WO2024057863A1

WO2024057863A1 - Ventilation system

Info

Publication number: WO2024057863A1
Application number: PCT/JP2023/030512
Authority: WO
Inventors: 祐司尾崎
Original assignee: パナソニックＩｐマネジメント株式会社
Priority date: 2022-09-16
Filing date: 2023-08-24
Publication date: 2024-03-21

Abstract

The present disclosure addresses the problem of providing a ventilation system in which the ventilation direction can be changed while the structure of a nozzle is simplified. In the ventilation system (VS1), a nozzle unit (1) has at least two nozzles (10). The at least two nozzles (10) each have a hollow elongated housing (10a) extending along a first direction, and the nozzles are lined up along a second direction that intersects the first direction. A ventilation device (3) is placed above the nozzle unit (1), and the ventilation device blows air from a first end (1a) toward a second end (1b) in the first direction of the nozzle unit (1). A control device (4) controls the ventilation device (3). Ventilation ports (10b) extending along the first direction are formed in the lower surfaces of the housings (10a) of the at least two nozzles (10). Air that has been sent into the housings (10a) is blown by the ventilation ports (10b) out of the housings (10a).

Description

ventilation system

The present disclosure relates to a ventilation system.

The blower device of Patent Document 1 includes a plurality of nozzles of equal length. The nozzle is provided with an inlet and an outlet. Then, high-pressure air flows into the nozzle through the inlet, and the high-pressure air inside the nozzle is blown out from the outlet. The plurality of nozzles are provided with gaps so that the respective outlets are on the same plane, and this gap forms an induced wind path for air attracted by the air flow blown out from the outlets on the outside of the nozzles. . The blower device includes a damper mechanism that changes the opening area of the inlet of the nozzle, and adjusts the blowing range by adjusting the opening area of the inlet of the nozzle.

In the blower device such as Patent Document 1, in order to make the blowing direction variable, it was necessary to provide the nozzle with a damper mechanism that made the opening area of the inlet of the nozzle variable. As a result, the structure of the nozzle has become complicated.

JP 2018-3658 Publication

An object of the present disclosure is to provide an air blowing system that can change the air blowing direction while simplifying the structure of the nozzle.

A blowing system according to one aspect of the present disclosure includes a nozzle unit, a blowing device, and a control device. The nozzle unit includes at least two nozzles each having a hollow elongated housing extending along a first direction, and arranged side by side along a second direction intersecting the first direction. has. The air blower is disposed above the nozzle unit and blows air from a first end to a second end of the nozzle unit in the first direction. The control device controls the blower. An air outlet extending along the first direction is formed on a lower surface of each housing of the at least two nozzles. The air outlet blows the air sent into the housing to the outside of the housing.

FIG. 1 is a perspective view showing a ventilation system according to an embodiment. FIG. 2 is a perspective view showing a blower unit included in the blower system. FIG. 3 is a side sectional view showing the same blower unit as above. FIG. 4 is a bottom view of the same blower unit as above. FIG. 5A is a plan view showing the right end of the nozzle included in the blower unit. FIG. 5B is a plan view showing the left end of the nozzle included in the air blowing unit. FIG. 6 is a diagram showing a part of the air blowing unit same as the above. FIG. 7 is a diagram showing the airflow directly below the air blowing system. FIG. 8 is a diagram showing oblique airflow in the air blowing system. FIG. 9 is a perspective view showing a ventilation unit included in the ventilation system of the first modification. FIG. 10 is a side sectional view showing the same air blowing unit as above. FIG. 11 is a diagram showing the airflow directly below the air blowing system. FIG. 12 is a diagram showing the first oblique airflow in the air blowing system. FIG. 13 is a diagram showing a second oblique airflow in the ventilation system same as above.

The present embodiment generally relates to a ventilation system. More particularly, the present disclosure relates to a blowing system comprising at least two nozzles formed in a hollow elongated shape and arranged in parallel.

Note that the embodiment described below is only an example of the embodiment of the present disclosure. The present disclosure is not limited to the following embodiments, and various changes can be made depending on the design etc. as long as the effects of the present disclosure can be achieved.

Furthermore, in the following description, unless otherwise specified, the X-axis, Y-axis, and Z-axis that are orthogonal to each other in FIG. 1 are defined. For convenience, one of the two directions along the X axis is defined as the right direction, and the other direction is defined as the left direction. Furthermore, one direction out of both directions along the Y axis is defined as the front direction, and the other direction is defined as the rear direction. Furthermore, one direction among the two directions along the Z-axis is defined as an upward direction, and the other direction is defined as a downward direction.

(Embodiment)
(1) Outline FIG. 1 shows the ventilation system VS1 of this embodiment. The ventilation system VS1 is used, for example, in facilities such as office buildings, offices, stores, factories, or commercial facilities. Moreover, the ventilation system VS1 may be used in a residential unit of an apartment complex, a detached house, or the like. Although the ventilation system VS1 is assumed to be installed in buildings such as facilities and houses, it may be installed in structures other than buildings.

The ventilation system VS1 of this embodiment includes a nozzle unit 1, a ventilation device 3, and a control device 4. The nozzle unit 1 has at least two nozzles 10. At least two nozzles 10 each have a hollow elongated housing 10a extending along the first direction, and are arranged side by side along a second direction intersecting the first direction. . The blower device 3 is arranged above the nozzle unit 1 and blows air from the first end 1a to the second end 1b of the nozzle unit 1 in the first direction. The control device 4 controls the blower device 3 . An air outlet 10b extending along the first direction is formed on the lower surface of each housing 10a of at least two nozzles 10. The air outlet 10b blows out the air sent into the interior of the housing 10a to the outside of the housing 10a.

In the air blowing system VS1 having the above configuration, the control device 4 controls the air blowing device 3, so that the air blowing direction can be made variable without providing the nozzle with a damper mechanism as in Patent Document 1 mentioned above. That is, the air blowing system VS1 can make the air blowing direction variable while simplifying the structure of the nozzle 10.

Note that in this embodiment, the first direction corresponds to the left-right direction along the X-axis, and the second direction corresponds to the front-rear direction along the Y-axis.

(2) Details As shown in FIG. 1, the ventilation system VS1 is installed in the room R1. The room R1 is a space where people exist, such as a working space, a conference room, a rest room, a waiting room, a reception room, and a living room. The upper surface of the room R1 is a ceiling R11, and the lower surface of the room R1 is a floor R12.

The ventilation system VS1 includes a nozzle unit 1, a ventilation device 3, and a control device 4. The nozzle unit 1 has eight nozzles 10. Moreover, it is preferable that the ventilation system VS1 further includes a first nozzle blower 21 and a second nozzle blower 22. Here, the nozzle unit 1, the first nozzle blower 21, and the second nozzle blower 22 constitute a blower unit U1.

Moreover, it is preferable that the ventilation system VS1 further includes an operation terminal 5 and a human sensor 6.

(2.1) Air Blower Unit The air blower unit U1 is fixed to the lower surface of the ceiling R11 with a hanging bolt or wire (not shown). The blower unit U1 includes a nozzle unit 1, a first nozzle blower 21, and a second nozzle blower 22, as shown in FIGS. 2-4.

The nozzle unit 1 includes eight nozzles 10. The nozzle 10 has a hollow rectangular plate-shaped housing 10a whose long sides extend in the left-right direction along the X-axis. A rectangular opening with long sides extending in the left-right direction is formed as an air outlet 10b on the lower surface of the housing 10a. The air outlet 10b is formed at the center in the front-rear direction on the lower surface of the housing 10a. The casings 10a of the eight nozzles 10 are arranged in parallel in the front-rear direction along the Y-axis. The front surface of the housing 10a of the nozzle 10 faces the rear surface of the housing 10a of the nozzle 10 adjacent to the front, and the rear surface of the housing 10a of the nozzle 10 faces the front surface of the housing 10a of the nozzle 10 adjacent to the rear. are doing. The housing 10a is made of, for example, a resin material, but may also be made of a lightweight metal material such as aluminum.

In the internal space of the housing 10a, a partition plate 10c is provided at the center in the longitudinal direction of the housing 10a. The partition plate 10c divides the internal space of the housing 10a into two spaces: a right space 10d, which is a space on the right side, and a left space 10e, which is a space on the left side.

As shown in FIG. 5A, an opening 10f is formed at the right end of the housing 10a, and the right space 10d communicates with the outside of the housing 10a via the opening 10f. As shown in FIG. 5B, an opening 10g is formed at the left end of the housing 10a, and the left space 10e communicates with the outside of the housing 10a via the opening 10g.

As shown in FIG. 3, FIG. 4, FIG. 5A, and FIG. 5B, a plurality of fins 10h are provided on the lower surface of each of the right space 10d and the left space 10e, arranged in the left-right direction at regular intervals along the X-axis. ing. The fin 10h has a plate shape extending upward from the lower surface of each of the right space 10d and the left space 10e, and the fin 10h has a plate shape extending upward from the lower surface of each of the right space 10d and left space 10e. (a part of the lower side of each space 10e) is closed. As shown in FIG. 4, when the housing 10a of the nozzle 10 is viewed from below, a plurality of fins 10h are positioned so as to partition the air outlet 10b at regular intervals along the X-axis.

The first nozzle blower 21 is a cross flow fan. As shown in FIGS. 2 to 4, the first nozzle blower 21 includes a hollow rectangular housing 21a, and has a fan 21b inside the housing 21a. The first nozzle blower 21 is provided at the right end (first end) 1a of the nozzle unit 1, and the left surface of the housing 21a faces the right end surface of the nozzle unit 1. The housing 21a is connected to a duct (not shown), and air is supplied from the duct, and an air outlet 21c (see FIG. 3) is formed on the left side of the housing 21a. Then, the air blown out to the left from the air outlet 21c by the rotation of the fan 21b flows into the right space 10d through the opening 10f of each nozzle 10 of the nozzle unit 1. That is, the first nozzle blower 21 sends air from the opening 10f of each nozzle 10 to the right space 10d, thereby generating an internal airflow F11 (see FIG. 3) that flows from the opening 10f to the left in the right space 10d. . The internal airflow F11 is rectified by the fins 10h in the right space 10d, and is blown downward from the air outlet 10b on the lower surface of the housing 10a. Note that, as shown in FIG. 5A, it is preferable that the width of the lower part of the right space 10d in the front-rear direction becomes narrower as it goes downward.

The second nozzle blower 22 is a cross flow fan. As shown in FIGS. 2 to 4, the second nozzle blower 22 includes a hollow rectangular housing 22a and a fan 22b inside the housing 22a. The second nozzle blower 22 is provided at the left end (second end) 1b of the nozzle unit 1, and the right surface of the housing 22a faces the left end surface of the nozzle unit 1. The housing 22a is connected to a duct (not shown), and air is supplied from the duct, and an air outlet 22c (see FIG. 3) is formed on the right side of the housing 22a. The air blown out to the right from the air outlet 22c as the fan 22b rotates flows into the left space 10e through the opening 10g of each nozzle 10 of the nozzle unit 1. That is, the second nozzle blower 22 sends air into the left space 10e from the opening 10f of each nozzle 10, thereby generating an internal airflow F12 (see FIG. 3) that flows from the opening 10g to the right in the left space 10e. . The internal airflow F12 is rectified by the fins 10h in the left space 10e, and is blown downward from the air outlet 10b on the lower surface of the housing 10a. Note that, as shown in FIG. 5B, it is preferable that the width of the lower part of the left space 10e in the front-rear direction becomes narrower toward the bottom.

That is, as shown in FIG. 6, each of the eight nozzles 10 making up the nozzle unit 1 generates the air flow F2 by blowing air downward from the elongated air outlet 10b on the lower surface of the housing 10a. . In addition, FIG. 6 shows arbitrary two nozzles 10 which are arrange|positioned adjacently in the front-back direction along the Y-axis among the eight nozzles 10 which comprise the nozzle unit 1.

Here, an attraction path 91 shown in FIG. 6 is formed between two nozzles 10 adjacent in the front-back direction. The attraction path 91 is a space that is sandwiched from the front and back between the rear surface of the casing 10a of the front nozzle 10 and the front surface of the casing 10a of the rear nozzle 10, and is open from above and below. Then, when each of the two nozzles 10 arranged side by side generates a blast air flow F2 blowing downward from the air outlet 10b, the attraction path 91 becomes a negative pressure, and the attraction path 91 has a space above the two nozzles 10. The air in the upper space 92 is drawn from top to bottom. The air attracted from the top to the bottom of the attraction path 91 is blown out from the attraction path 91 downward. The air blown downward from the attraction path 91 generates an attraction airflow F3 that flows downward from the attraction path 91.

As a result, below the nozzle unit 1, an induced airflow F3 is generated between the two blast airflows F2 generated by two adjacent nozzles 10, and a descending airflow F1 is created by combining the blast airflow F2 and the induced airflow F3. generated. The downdraft F1 is blown out from the nozzle unit 1 downward.

If the flow rate of the descending air flow F1 at the air outlet 10b is taken as the amount of air blown by the nozzle unit 1, the amount of air blown from the nozzle unit 1 increases as each rotational speed of the

fans

21b and 22b increases, and each rotational speed of the

fans

21b and 22b increases. As the value decreases, the amount of air blown from the nozzle unit 1 decreases. The rotational speeds of the

fans

21b and 22b are controlled by the control device 4.

(2.2) Air blower The air blower 3 is a cross flow fan. The blower device 3 is arranged above the nozzle unit 1, sucks in surrounding air, and blows the air from the right end (first end) 1a to the left end (second end) 1b of the nozzle unit 1.

Specifically, as shown in FIG. 3, the blower device 3 is arranged above the first nozzle blower 21 (or above the right end 1a of the nozzle unit 1). The blower device 3 is fixed to the lower surface of the ceiling R11 with a hanging bolt or wire (not shown). The blower device 3 includes a hollow rectangular housing 3a, and has a fan 3b inside the housing 3a. An air outlet 3c is formed on the left side of the housing 3a. The air blown out to the left from the air outlet 3c by the rotation of the fan 3b turns into an airflow F21 that flows above the nozzle unit 1 from right to left.

Assuming that the flow rate of the air flow F21 at the air outlet 3c is the amount of air blown by the blower 3, the amount of air blown by the blower 3 increases as the rotational speed of the fan 3b increases. Further, as the rotational speed of the fan 3b decreases, the amount of air blown by the air blower 3 decreases. The rotation speed of the fan 3b is controlled by the control device 4.

(2.3) Control device The control device 4 controls at least the blower device 3. In this embodiment, the control device 4 controls the blower device 3, the first nozzle blower 21, and the second nozzle blower 22.

The control device 4 performs wired communication or wireless communication with the blower device 3, the first nozzle blower 21, and the second nozzle blower 22, thereby controlling the blower device 3, the first nozzle blower 21, and the second nozzle blower 22. The amount of air blown by each blower 22 is controlled. Further, the control device 4 acquires an operation signal from the operation terminal 5 and a sensor signal from the human sensor 6 by performing wired communication or wireless communication with the operation terminal 5 and the human sensor 6. . Note that the wired communication is, for example, wired communication via a twisted pair cable, a dedicated communication line, or a LAN (Local Area Network) cable. The wireless communication is, for example, wireless communication compliant with standards such as Wi-Fi (registered trademark), Bluetooth (registered trademark), ZigBee (registered trademark), or low power wireless that does not require a license (specific low power wireless).

The operating terminal 5 includes a switch or a touch panel for instructing each operation of the blower device 3, the first nozzle blower 21, and the second nozzle blower 22, and accepts user operations. The operation terminal 5 then transmits an operation signal according to the user's operation to the control device 4. Specifically, the operation terminal 5 accepts operations such as operation, stop, and direction of air blowing. Based on the operation signal received from the operation terminal 5, the control device 4 controls the operation and stop of each of the blower device 3, the first nozzle blower 21, and the second nozzle blower 22, and the amount of air blown during operation.

The human sensor 6 detects the presence or absence of a person in the room R1 and the position of the person, and transmits the detection result to the control device 4 as a sensor signal. Based on the sensor signal received from the human sensor 6, the control device 4 controls the operation and stop of each of the blower device 3, the first nozzle blower 21, and the second nozzle blower 22, and the amount of air blown during operation. .

Therefore, the control device 4 controls the operation and operation of each of the blower device 3, the first nozzle blower 21, and the second nozzle blower 22 based on the user's operation received by the operation terminal 5 and the detection result of the human sensor 6. You can switch between stops and adjust the amount of air flow during each operation.

(2.4) Operation of the air blowing system In the air blowing system VS1, the control device 4 controls the air blower 3, the first nozzle blower 21, and the second nozzle blower 22 to generate air below the nozzle unit 1. Adjust the direction of airflow. In this embodiment, the control device 4 puts the first nozzle blower 21 and the second nozzle blower 22 into operation, and then controls the operation, stopping, and air flow rate of the blower 3 to control the nozzle unit 1. The direction of the airflow generated downward (blow direction) is variable.

(2.4.1) Airflow Directly Below FIG. 7 shows the airflow generated below the nozzle unit 1 when the first nozzle blower 21 and the second nozzle blower 22 are in operation and the blower 3 is in a stopped state. The airflow F31 directly below is shown.

In this case, the descending airflow F1 is blown downward from the nozzle unit 1. On the other hand, the air flow F21 is not blown out from the air outlet 3c of the air blower 3. Therefore, the descending airflow F1 blown downward from the nozzle unit 1 proceeds directly below (vertically downward), and below the nozzle unit 1, the downward airflow F31 that proceeds directly below is generated.

(2.4.2) Oblique airflow FIG. 8 shows the airflow generated below the nozzle unit 1 when the first nozzle blower 21 and the second nozzle blower 22 are in operation and the blower device 3 is also in operation. The oblique airflow F32 is shown as an airflow.

In this case, the descending airflow F1 is blown downward from the nozzle unit 1. Further, above the nozzle unit 1, a blowing air flow F21 is blown out from the blowing port 3c of the blowing device 3 to the left. The blast airflow F21 flowing from right to left above the nozzle unit 1 is attracted by the downward airflow F1 blowing out from the nozzle unit 1 and is pulled downward, passing between two nozzles 10 adjacent in the front and back direction and moving to the left. Proceed diagonally downward. As a result, the descending airflow F1 is attracted by the blowing airflow F21 that advances diagonally downward to the left below the nozzle unit 1, and the descending airflow F1 also advances diagonally downward to the left. Therefore, below the nozzle unit 1, an oblique airflow F32 that moves diagonally downward to the left is generated.

The larger the air volume of the air blower 3 (the larger the air volume of the air flow F21), the closer the direction of movement of the oblique air flow F32 becomes to the horizontal direction. Moreover, the smaller the air flow rate of the air blower 3 (the smaller the air flow rate of the air flow F21), the closer the direction of movement of the oblique air flow F32 becomes to the direct downward direction. That is, the control device 4 can control the traveling direction of the oblique airflow F32 by adjusting the amount of air blown by the blower 3.

(2.4.3) Swing airflow The control device 4 periodically switches between operating and stopping the blower 3 to periodically control the direct airflow F31 (see Fig. 7) and the oblique airflow F32 (see Fig. 8). You can switch to As a result, the air blowing system VS1 can generate a swing airflow in which the direct airflow F31 and the oblique airflow F32 are alternately generated below the nozzle unit 1.

Furthermore, the control device 4 can periodically change the traveling direction of the oblique airflow F32 (see FIG. 8) by periodically increasing and decreasing the amount of air blown by the blower device 3. The control device 4 alternately repeats an increase period in which the amount of air blown by the air blower 3 is increased and a decrease period in which the amount of air blown by the air blower 3 is decreased. As a result, the air blowing system VS1 can generate a swing airflow in which the traveling direction of the oblique airflow F32 changes continuously below the nozzle unit 1.

In addition, the control device 4 realizes a swing airflow that continuously changes between the direct airflow F31 and the oblique airflow F32 by periodically increasing and decreasing the airflow amount of the airflow device 3 between zero and a target value. can.

As described above, in the blower system VS1, the control device 4 controls the blower device 3 to generate the direct airflow F31 and the diagonal airflow F32. Further, the swing airflow can be generated by the control device 4 switching between operating and stopping the blower device 3 or periodically changing the amount of air blown by the blower device 3. That is, the air blowing system VS1 can make the air blowing direction variable without providing a damper mechanism in the nozzle. That is, the air blowing system VS1 can make the air blowing direction variable while simplifying the structure of the nozzle 10.

(3) First Modified Example FIGS. 9 and 10 show a blower unit U2 as a modified example of the blower unit. Note that other configurations are similar to those in the above-described embodiment, and similar configurations are denoted by the same reference numerals and description thereof will be omitted.

The blower unit U2 is obtained by adding a blower device 3 arranged above the second nozzle blower 22 (or above the left end 1b of the nozzle unit 1) to the blower unit U1. In the following description, the blower 3 placed above the first nozzle blower 21 will be referred to as the first blower 31, and the blower 3 placed above the second nozzle blower 22 will be referred to as the second blower 32. do.

A ventilation port 3c is formed on the right side of the casing 3a of the second ventilation device 32. The air blown out to the right from the air outlet 3c by the rotation of the fan 3b becomes an airflow F22 (see FIG. 10) that flows above the nozzle unit 1 from left to right.

In this modification, the control device 4 controls the first blower 31 , the second blower 32 , the first nozzle blower 21 , the first blower 31 , the second blower 32 , the first nozzle blower 21 , It is possible to switch between operation and stop of each of the second nozzle blowers 22 and adjust the amount of air blown during each operation. Therefore, the control device 4 puts the first nozzle blower 21 and the second nozzle blower 22 into operation, and then controls the operation, stopping, and air blowing amount of the first blower 31 and the second blower 32. , adjust the direction of airflow (blow direction) generated below the nozzle unit 1.

(3.1) Airflow Directly Below FIG. 11 shows the flow of the nozzle unit 1 when the first nozzle blower 21 and the second nozzle blower 22 are in operation and the first blower 31 and second blower 32 are in a stopped state. A direct airflow F41, which is an airflow generated downward, is shown.

In this case, the descending airflow F1 is blown downward from the nozzle unit 1. On the other hand, the airflows F21 and F22 are not blown out from the respective ventilation ports 3c of the first ventilation device 31 and the second ventilation device 32, respectively. Therefore, the downward airflow F1 blown downward from the nozzle unit 1 proceeds directly below (vertically downward), and below the nozzle unit 1, the downward airflow F41 that proceeds directly below is generated.

(3.2) First oblique airflow FIG. 12 shows the flow of air below the nozzle unit 1 when the first nozzle blower 21 and the second nozzle blower 22 are in operation, and the first blower 31 is also in operation. A first oblique airflow F42, which is a generated airflow, is shown. At this time, the second air blower 32 is in a stopped state.

In this case, the descending airflow F1 is blown downward from the nozzle unit 1. Moreover, above the nozzle unit 1, the air flow F21 is blown out from the air outlet 3c of the first air blower 31 to the left. The blast airflow F21 flowing from right to left above the nozzle unit 1 is attracted by the downward airflow F1 blowing out from the nozzle unit 1 and is pulled downward, passing between two nozzles 10 adjacent in the front and back direction and moving to the left. Proceed diagonally downward. As a result, the descending airflow F1 is attracted by the blowing airflow F21 that advances diagonally downward to the left below the nozzle unit 1, and the descending airflow F1 also advances diagonally downward to the left. Therefore, below the nozzle unit 1, a first diagonal airflow F42 that moves diagonally downward to the left is generated.

The larger the air volume of the first air blower 31 (the larger the air volume of the air flow F21), the closer the traveling direction of the first oblique air flow F42 becomes to the horizontal direction. Furthermore, the smaller the air flow rate of the first air blower 31 (the smaller the air flow rate of the air flow F21), the closer the traveling direction of the first oblique air flow F42 becomes to the direct downward direction. That is, the control device 4 can control the traveling direction of the first oblique airflow F42 by adjusting the amount of air blown by the first air blower 31.

(3.3) Second oblique airflow FIG. 13 shows the flow of air below the nozzle unit 1 when the first nozzle blower 21 and the second nozzle blower 22 are in operation, and the second blower 32 is also in operation. A second oblique airflow F43, which is a generated airflow, is shown. At this time, the first air blower 31 is in a stopped state.

In this case, the descending airflow F1 is blown downward from the nozzle unit 1. Further, above the nozzle unit 1, a blowing air flow F22 is blown out to the right from the blowing port 3c of the second blowing device 32. The blast airflow F22 flowing from left to right above the nozzle unit 1 is attracted by the downward airflow F1 blowing out from the nozzle unit 1 and is drawn downward, passing between two nozzles 10 adjacent in the front and back direction and moving to the right. Proceed diagonally downward. As a result, the descending airflow F1 is attracted by the blowing airflow F22 that advances diagonally downward to the right below the nozzle unit 1, and the descending airflow F1 also advances diagonally downward to the right. Therefore, below the nozzle unit 1, a second oblique airflow F43 that moves diagonally downward to the right is generated.

The larger the air volume of the second air blower 32 (the larger the air volume of the air flow F22), the closer the traveling direction of the second oblique air flow F43 becomes to the horizontal direction. Moreover, the smaller the air flow rate of the second air blower 32 (the smaller the air flow rate of the air flow F22), the closer the traveling direction of the second oblique air flow F43 becomes to the direct downward direction. That is, the control device 4 can control the traveling direction of the second oblique airflow F43 by adjusting the amount of air blown by the second blower 32.

(3.4) Swing Air Flow The control device 4 can switch between operation and stop of each of the first blower device 31 and the second blower device 32. Therefore, the control device 4 alternately switches the operating period of the first blower 31 and the second blower 32 to create a first diagonal airflow F42 (see FIG. 12) and a second diagonal airflow F43 (see FIG. 13)) is preferably switched periodically. As a result, the blower system VS1 can generate a swing airflow in which the first oblique airflow F42 and the second oblique airflow F43 are alternately generated below the nozzle unit 1. That is, the ventilation system VS1 can expand the variable range of the ventilation direction by controlling the first ventilation device 31 and the second ventilation device 32.

Moreover, when the control device 4 alternately switches the operating period of the first air blower 31 and the operating period of the second air blower 32, the control device 4 controls the operation period of the first air blower 31 and the operation period of the second air blower 32. In between, a full stop period may be provided in which both the first blower 31 and the second blower 32 are stopped. In this case, the air blowing system VS1 can realize a swing airflow that repeatedly occurs below the nozzle unit 1 in the order of the first oblique airflow F42→directly below airflow F41→second oblique airflow F43→directly below airflow F41→first oblique airflow F42. Therefore, the ventilation system VS1 can generate a smooth swing airflow.

Furthermore, it is preferable that the control device 4 increases the air flow rate of the first air blower 31 from zero to the first target value, and then decreases it to zero during the operation period of the first air blower 31. In this case, the traveling direction of the first oblique airflow F42 changes continuously below the nozzle unit 1. Similarly, during the operation period of the second blower 32, the control device 4 preferably increases the amount of air blown by the second blower 32 from zero to the second target value, and then decreases it to zero. In this case, the traveling direction of the second oblique airflow F43 changes continuously below the nozzle unit 1. Therefore, the air blowing system VS1 can smoothly change the air blowing direction, and can realize a swing airflow in which the traveling directions of the first oblique airflow F42 and the second oblique airflow F43 change continuously.

Specifically, during the operation period of the first blower device 31, the traveling direction of the first oblique airflow F42 gradually changes from directly below to the left, and then gradually returns from the left to directly below. When the traveling direction of the first oblique airflow F42 returns to the direct downward direction, the operating period of the first air blower 31 ends, and the operating period of the second air blower 32 begins. During the operation period of the second blower device 32, the traveling direction of the second oblique airflow F43 gradually changes from directly below to the right, and then gradually returns from the right to directly below. When the traveling direction of the second oblique airflow F43 returns to the direct downward direction, the operating period of the second blower 32 ends, and the operating period of the first blower 31 starts. By repeating the above-described operation, a swing airflow in which the traveling directions of the first oblique airflow F42 and the second oblique airflow F43 change continuously is realized.

Further, the control device 4 may continuously change the blowing direction of the swing airflow by continuously adjusting the ratio between the blowing amount of the first blowing device 31 and the blowing amount of the second blowing device 32. .

As described above, in the first modification, the control device 4 controls the first blower 31 and the second blower 32 to generate the direct airflow F41, the first diagonal airflow F42, and the second diagonal airflow F43. can. In addition, the control device 4 switches between operating and stopping the first blower device 31 and the second blower device 32, or periodically changes the amount of air blown by the first blower device 31 and the second blower device 32. , can generate swing airflow. That is, the air blowing system VS1 can make the air blowing direction variable without providing a damper mechanism in the nozzle. That is, the air blowing system VS1 can make the air blowing direction variable while simplifying the structure of the nozzle 10.

(4) Second Modification Each of the first nozzle blower 21, the second nozzle blower 22, and the blower 3 may be other than a crossflow fan, for example, a sirocco fan or a propeller fan.

Furthermore, each of the first nozzle blower 21, the second nozzle blower 22, and the blower device 3 may take in air through a duct or may take in air around the casing.

Instead of having the blower device 3, the blower units U1 and U2 may be configured to include a duct through which high-pressure air flows. In this case, each nozzle 10 of the nozzle unit 1 is supplied with air from a duct.

The number of nozzles 10 that the nozzle unit 1 has may be two or more.

Furthermore, the structure to which the blower units U1 and U2 are attached is not limited to the ceiling R11, but may be another structure such as a pedestal provided above the room R1.

Moreover, each of the configurations of the above-described embodiment and modified example can be combined as appropriate, and the effects of each configuration can be similarly obtained.

(5) Summary The ventilation system (VS1) of the first aspect according to the above-described embodiment includes a nozzle unit (1), a ventilation device (3), and a control device (4). The nozzle unit (1) has at least two nozzles (10). The at least two nozzles (10) each have a hollow elongated housing (10a) extending along the first direction, and are lined up along a second direction intersecting the first direction. Placed. The blower device (3) is arranged above the nozzle unit (1) and blows air from the first end (1a) to the second end (1b) in the first direction of the nozzle unit (1). The control device (4) controls the blower device (3). An air outlet (10b) extending along the first direction is formed on the lower surface of each housing (10a) of the at least two nozzles (10). The air outlet (10b) blows the air sent into the housing (10a) to the outside of the housing (10a).

The above-described air blowing system (VS1) can make the air blowing direction variable while simplifying the structure of the nozzle (10).

In the second aspect of the ventilation system (VS1) according to the above-described embodiment, in the first aspect, the control device (4) preferably adjusts the amount of air blown by the ventilation device (3).

The above-mentioned air blowing system (VS1) can smoothly change the air blowing direction by adjusting the air blowing amount of the air blower (3).

In the ventilation system (VS1) of the third aspect according to the above-described embodiment, in the first or second aspect, the control device (4) may periodically increase or decrease the amount of air blown by the ventilation device (3). preferable.

The above-mentioned ventilation system (VS1) can generate swing airflow.

In the ventilation system (VS1) of the fourth aspect according to the above-described embodiment, in the first aspect, the ventilation device (3) is a first ventilation device (31), and a second ventilation device (32). It is preferable to further include. The second air blower (32) is arranged above the nozzle unit (1) and blows air from the second end (1b) toward the first end (1a) in the first direction. The control device (4) controls the first air blower (31) and the second air blower (32).

The above-mentioned ventilation system (VS1) can expand the variable range of the ventilation direction by controlling the first ventilation device (31) and the second ventilation device (32).

In the ventilation system (VS1) of the fifth aspect according to the above-described embodiment, in the fourth aspect, the control device (4) controls the operation period of the first ventilation device (31) and the operation period of the second ventilation device (32). It is preferable to alternately switch the operation period.

The above-mentioned ventilation system (VS1) can generate swing airflow over a wider range.

In the ventilation system (VS1) of the sixth aspect according to the above-described embodiment, in the fifth aspect, the control device (4) controls the operation period of the first ventilation device (31) and the operation period of the second ventilation device (32). It is preferable to provide a full stop period in which both the first blower (31) and the second blower (32) are stopped between the operating periods.

The above-mentioned ventilation system (VS1) can generate a smooth swing airflow.

In the ventilation system (VS1) of the seventh aspect according to the above-described embodiment, in any one of the fourth to sixth aspects, the control device (4) controls the first ventilation device (31) and the second ventilation system. Preferably, the amount of air blown by each device (32) is adjusted.

The above-mentioned air blowing system (VS1) can smoothly change the air blowing direction by adjusting the amount of air blown by each of the first air blower (31) and the second air blower (32).

In the ventilation system (VS1) of the eighth aspect according to the above-described embodiment, in the seventh aspect, the control device (4) controls the operation of the first ventilation device (31) during the operation period of the first ventilation device (31). It is preferable that the amount of air blown is increased from zero to the first target value and then decreased to zero. Preferably, the control device (4) increases the amount of air blown by the second blower (32) from zero to the second target value and then decreases it to zero during the operation period of the second blower (32).

The above-mentioned air blowing system (VS1) can smoothly change the air blowing direction.

VS1 Air blowing system 1 Nozzle unit 1a Right end (first end)
1b Left end (second end)
10 nozzle 10a housing 10b ventilation port 3 ventilation device 31 first ventilation device 32 second ventilation device 4 control device

Claims

A nozzle unit having at least two nozzles each having a hollow elongated housing extending along the first direction and arranged side by side along a second direction intersecting the first direction; ,
a blower device that is disposed above the nozzle unit and blows air from a first end toward a second end of the nozzle unit in the first direction;
A control device that controls the blower,
An air outlet extending along the first direction is formed on the lower surface of each housing of the at least two nozzles,
The air blowing system is such that the air blowing port blows out the air sent into the interior of the housing to the outside of the housing.
The air blowing system according to claim 1, wherein the control device adjusts the amount of air blown by the air blowing device.
The air blowing system according to claim 1 or 2, wherein the control device periodically increases or decreases the amount of air blown by the air blower.
The blower is a first blower,
further comprising a second blowing device that is disposed above the nozzle unit and blows air from the second end toward the first end in the first direction,
The ventilation system according to claim 1, wherein the control device controls the first ventilation device and the second ventilation device.
The blowing system according to claim 4, wherein the control device alternately switches between an operating period of the first blowing device and an operating period of the second blowing device.
The control device provides a full stop period in which both the first air blower and the second air blower are stopped between the operation period of the first air blower and the operation period of the second air blower. Item 5. Air blowing system.
The blowing system according to any one of claims 4 to 6, wherein the control device adjusts the amount of air blown by each of the first blowing device and the second blowing device.
The control device includes:
During the operation period of the first blower, increasing the air flow rate of the first blower from zero to a first target value, and then decreasing it to zero;
The blowing system according to claim 7, wherein during the operation period of the second blowing device, the amount of air blown by the second blowing device is increased from zero to a second target value, and then is decreased to zero.