JP7395896B2 - ventilation system - Google Patents

Description

TECHNICAL FIELD This invention relates to a ventilation system.

A ventilation system consists of a chamber box that opens into the room and has an opening that serves as an intake port for exhausting indoor air or an air supply port for blowing outside air into the room, and a movable panel that opens and closes the opening of this chamber box. , a control device that brakes the movable panel at any position within its movable range, and a sensor that is provided inside the chamber box of the movable panel and detects the indoor air condition. There is a known ventilation terminal device that determines the degree of contamination of indoor air based on the output of the ventilation terminal, controls a movable panel according to the determination result, and adjusts the air volume (for example, see Patent Document 1).

Japanese Patent Application Publication No. 06-011177

However, in the ventilation device as shown in Patent Document 1, when performing an air supply operation, the sensor that detects the indoor air condition is exposed to outdoor air. Therefore, the output of the sensor also depends on the degree of contamination (amount of pollution) of the outdoor air, making it difficult to adjust the amount of ventilation according to the amount of pollution of the indoor air.

This invention was made to solve such problems. The purpose is to provide a ventilation system that can detect the amount of indoor air pollution without being affected by the amount of outdoor air pollution, and can appropriately adjust the amount of ventilation according to the amount of indoor air pollution. There is a particular thing.

The ventilation device according to the present invention includes: an indoor air supply section in which an indoor air supply port is formed for blowing air supplied from outdoors into an indoor space; an indoor sensor that detects the amount of air pollution in the indoor space; an air supply amount changing device that changes the amount of air blown out from the indoor air supply port according to a detection result of the indoor sensor; and a wind shielding device that blocks wind blown out from the indoor air supply port and directly directed toward the indoor sensor; The indoor air supply section includes a panel section in which a plurality of the indoor air supply ports are formed and is arranged on the ceiling of the indoor space, and the indoor sensor is provided on the panel section and includes a panel section in which a plurality of the indoor air supply ports are formed. The indoor air supply port is disposed closer to the periphery of the panel portion than the indoor sensor, the wind blocking means includes a wind guide plate that changes the direction of air blown from the indoor air supply port, and the air guide plate is configured to The direction of the air blown from the indoor air supply port can be changed within a range from vertically downward to the ceiling surface to the peripheral edge of the panel part, and the direction of the air blown from the indoor air supply port is directed toward the indoor space. The sensor is oriented in such a way as to obstruct the flow of air from other installed air blowing devices toward the indoor sensor .

According to the ventilation device according to the present invention, it is possible to detect the amount of pollution in indoor air without being affected by the amount of pollution in outdoor air, and it is possible to appropriately adjust the amount of ventilation according to the amount of pollution in indoor air. It has the effect of being.

1 is a diagram schematically showing the configuration of a room in which a ventilation device according to Embodiment 1 of the present invention is installed. 1 is a diagram schematically showing the configuration of a ventilation device according to Embodiment 1 of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic diagram of the ventilation device according to Embodiment 1 of the present invention, viewed from the indoor space side. 1 is a block diagram showing the configuration of a control system of a ventilation device according to Embodiment 1 of the present invention. FIG. It is a figure which shows typically the structure of another example of the ventilation device based on Embodiment 1 of this invention. FIG. 2 is a schematic diagram of another example of the ventilation device according to Embodiment 1 of the present invention, viewed from the indoor space side. FIG. 2 is a diagram schematically showing the configuration of a room in which a ventilation device according to Embodiment 2 of the present invention is installed.

DESCRIPTION OF THE PREFERRED EMBODIMENTS Modes for carrying out the invention will be described with reference to the accompanying drawings. In each figure, the same or corresponding parts are given the same reference numerals, and overlapping explanations will be simplified or omitted as appropriate. In the following description, for convenience, the positional relationship of each structure may be expressed based on the illustrated state. Note that the present invention is not limited to the following embodiments, and can be modified in various ways without departing from the spirit of the present invention.

Embodiment 1.
Embodiment 1 of the present invention will be described with reference to FIGS. 1 to 6. FIG. 1 is a diagram schematically showing the configuration of a room in which a ventilation device is installed. FIG. 2 is a diagram schematically showing the configuration of the ventilation device. FIG. 3 is a schematic diagram of the ventilation device viewed from the indoor space side. FIG. 4 is a block diagram showing the configuration of the control system of the ventilation device. FIG. 5 is a diagram schematically showing the configuration of another example of the ventilation device. FIG. 6 is a schematic diagram of another example of the ventilation device viewed from the indoor space side.

A ventilation system 10 according to this embodiment is installed in a room 1, as shown in FIG. The ventilation device 10 is for introducing air outside the room 1 (hereinafter referred to as "outdoor air") into the interior space of the room 1 (hereinafter referred to as "indoor space") to be ventilated.

As shown in FIG. 2, the ventilation device 10 includes a housing 11 and a duct 12. The housing 11 has a hollow box shape. The duct 12 is a hollow cylindrical member. The housing 11 and the duct 12 are installed in the ceiling of the room 1, that is, above the ceiling 2. One end of the duct 12 is connected to the housing 11. An outside air inlet 13 is formed at the other end of the duct 12 . The outside air inlet 13 is an opening for taking in outdoor air. The inside of the casing 11 communicates with the outdoors via the inside of the duct 12 and the outside air inlet 13.

The ventilation device 10 includes a panel section 14. The panel section 14 is provided on the lower surface of the housing 11. The panel section 14 is exposed to the indoor space of the room 1 along the ceiling surface. In other words, the panel section 14 is arranged on the ceiling 2 of the indoor space of the room 1. An indoor air supply port 15 is formed in the panel portion 14 . The indoor air supply port 15 is an opening for blowing air supplied from outdoors into the indoor space. The inside of the casing 11 communicates with the indoor space of the room 1 via the indoor air supply port 15. In this way, in the ventilation device 10, an air path is formed that communicates from the outside air introduction port 13 to the indoor air supply port 15 through the inside of the casing 11 and the duct 12.

The ventilation system 10 includes a ventilation fan 17 and a fan motor 18. The blower fan 17 is housed inside the housing 11. The blower fan 17 is for generating an air flow that flows through the above-mentioned air path from the outside air inlet 13 to the indoor air supply port 15 through the inside of the casing 11. Fan motor 18 drives rotation of ventilation fan 17 . When the blower fan 17 rotates, outdoor air passes through the duct 12 from the outside air inlet 13 and is taken into the housing 11. The air taken into the housing 11 is then blown out into the indoor space of the room 1 from the indoor air supply port 15.

The panel portion 14 is provided with a baffle plate 16 . The air guide plate 16 changes the direction of air blown out from the indoor air supply port 15. As described above, the panel section 14, the indoor air supply port 15, and the air guide plate 16 constitute an indoor air supply section that blows air supplied from the outdoors into the indoor space of the room 1.

The ventilation system 10 includes an indoor sensor 31. The indoor sensor 31 detects the amount of air pollution in the indoor space of the room 1 . Specifically, the indoor sensor 31 detects one or more of dust concentration, carbon dioxide concentration, odor concentration, and VOC concentration as the amount of indoor air pollution. Specifically, the indoor sensor 31 detects the dust concentration, for example, the concentration of particles such as PM2.5, various allergens, pollen, bacteria, and mold. Furthermore, the indoor sensor 31 may be capable of detecting environmental physical quantities such as temperature, humidity, and atmospheric pressure.

The ventilation system 10 of this embodiment includes an outdoor sensor 32. Outdoor sensor 32 detects the amount of pollution in outdoor air. Specifically, the outdoor sensor 32 detects one or more of dust concentration, carbon dioxide concentration, odor concentration, and VOC concentration as the amount of outdoor air pollution. At this time, the element of the amount of pollution of the outdoor air detected by the outdoor sensor 32 is made to include at least the element of the amount of pollution of the indoor air detected by the indoor sensor 31 described above. Note that the outdoor sensor 32 detects the amount of contamination of outdoor air taken indoors from the outdoor air inlet 13. Therefore, in the configuration example described here, the outdoor sensor 32 is installed in the duct 12.

The ventilation system 10 of this embodiment includes a human detection sensor 33. The person detection sensor 33 detects a person 3 in the indoor space of the room 1. The human detection sensor 33 is, for example, an infrared sensor. The infrared sensor uses a known configuration to detect the surface temperature distribution (thermal image) within the detection target range in a non-contact manner. The detection result of the infrared sensor, that is, the surface temperature distribution (thermal image) data acquired by the infrared sensor is processed by the control device 20, which will be described later. It is possible to detect the presence or absence of heat sources, their number and their positions, the surface temperature of the human body, parts of the human body (exposed and non-exposed parts of the skin, head, etc.), etc.

In the configuration example described here, as shown in FIG. 3, a plurality of indoor air supply ports 15 are formed in the panel section 14. The panel portion 14 has a square shape with four rounded corners. Four indoor air supply ports 15 are arranged along each of the four sides of the panel section 14. Further, an indoor sensor 31 is arranged at the center of the panel section 14. Therefore, the plurality of indoor air supply ports 15 are arranged closer to the periphery of the panel section 14 than the indoor sensor 31 is.

As shown in FIG. 2, the ventilation device 10 includes a control device 20. The control device 20 controls the overall operation of the ventilation device 10. The control device 20 is equipped with a control circuit and the like for implementing various controls necessary for the operation of the ventilation device 10. The control device 20 includes, for example, a microcomputer, and includes a processor and memory (not shown). The control device 20 controls the ventilation device 10 by having a processor execute a program stored in a memory, thereby executing preset processing.

Next, the configuration of the control system of the ventilation system 10 will be described with reference to FIG. 4. In the ventilation system 10 of this embodiment, the control device 20 includes an air supply control section 21 and an external information acquisition section 22 shown in the figure. The external information acquisition unit 22 is an external information acquisition unit that acquires information regarding the amount of pollution in outdoor air from the outside. The external information acquisition unit 22 is connected to an external communication network such as the Internet, for example. Then, the external information acquisition unit 22 acquires information regarding the amount of outdoor air pollution from an external information source via the Internet or the like. Specific examples of information regarding the amount of outdoor air pollution include information regarding the occurrence of PM2.5, pollen, and photochemical smog. The outdoor sensor 32 and the external information acquisition unit 22 constitute outdoor pollution amount acquisition means that acquires the amount of pollution in outdoor air.

Note that, although it is preferable that the outdoor pollution amount acquisition means includes both the outdoor sensor 32 and the external information acquisition section 22, it is not necessary to include both of these. That is, the outdoor pollution amount acquisition means only needs to include at least one of the outdoor sensor 32 and the external information acquisition section 22.

The outdoor air pollution amount acquired by the outdoor pollution amount acquisition means, that is, the detection result of the outdoor sensor 32 and the information regarding the outdoor air pollution amount acquired by the external information acquisition section 22 are input to the air supply control section 21 . Further, the amount of pollution in indoor air, which is the detection result of the indoor sensor 31, is also input to the air supply control unit 21. Further, the presence or absence of a person 3 in the room 1, which is a detection result of the person detection sensor 33, is also input to the air supply control unit 21. Then, the air supply control unit 21 operates and guides the fan motor 18 that drives the ventilation fan 17 according to the amount of indoor air pollution, the amount of outdoor air pollution, and the presence or absence of a person 3 in the room 1 that have been input in this way. The direction of the wind plate 16 is controlled. Therefore, the air supply control unit 21, the blower fan 17, and the fan motor 18 constitute an air supply amount changing unit that changes the amount of air blown out from the indoor air supply port 15 according to the detection result of the indoor sensor 31.

Specifically, for example, if the amount of indoor air pollution detected by the indoor sensor 31 increases, the air supply control unit 21 increases the rotation speed of the fan motor 18 and increases the amount of air blown out from the indoor air supply port 15. Conversely, if the amount of indoor air contamination detected by the indoor sensor 31 decreases, the air supply control unit 21 lowers the rotation speed of the fan motor 18 and reduces the amount of air blown out from the indoor air supply port 15. At this time, the air supply control unit 21 determines the rotation speed of the fan motor 18 by comparing the amount of pollution in the indoor air detected by the indoor sensor 31 and the amount of pollution in the outdoor air detected by the outdoor sensor 32. Good too. That is, for example, when the amount of pollution in the outdoor air is less than the amount of pollution in the indoor air, the air supply control unit 21 increases the rotation speed of the fan motor 18 to increase the amount of air blown out from the indoor air supply port 15. Conversely, when the amount of pollution in the outdoor air is greater than the amount of pollution in the indoor air, the air supply control unit 21 lowers the rotation speed of the fan motor 18 and reduces the amount of air blown out from the indoor air supply port 15. Such control can reduce the concentration of pollutants in indoor air.

Further, when the person detection sensor 33 detects that there is a person 3 in the room 1, the air supply control unit 21 controls the indoor air supply according to the position of the person 3 detected by the person detection sensor 33, for example. The wind blown out from the mouth 15 may be directed toward the person 3. That is, the air guide plate 16 changes the direction of the wind blown out from the indoor air supply opening 15 according to the detection result of the human detection sensor 33. By doing so, carbon dioxide and the like generated from the person 3 can be removed from the area around the person 3, and the concentration of pollutants around the person 3 can be reduced preferentially.

In the ventilation system 10 configured as described above, the air guide plate 16 can change the direction of the air blown out from the indoor air supply port 15 within a range from vertically downward to the ceiling surface to toward the peripheral edge of the panel section 14. be. That is, the air guide plate 16 prevents the wind blown from the indoor air supply port 15 from moving toward the indoor sensor 31 side rather than vertically downward with respect to the ceiling surface. Therefore, the baffle plate 16 functions as a wind shielding means for blocking the wind blown out from the indoor air supply port 15 and directed directly toward the indoor sensor 31 .

As shown in FIG. 1, pollutants 4 generated from people 3, objects, etc. in the indoor space of the room 1 float in the indoor space, rise, and reach the indoor sensor 31 located on the ceiling 2 of the room 1. and is detected by the indoor sensor 31. At this time, if the outdoor air blown out from the indoor air supply port 15 directly heads towards the indoor sensor 31, the detection result of the indoor air pollution amount by the indoor sensor 31 will be influenced by the outdoor air pollution amount. .

The ventilation device 10 of this embodiment includes the air guiding plate 16 as the wind blocking means described above, thereby suppressing the contact between the indoor sensor 31 and the outdoor air blown out from the indoor air supply port 15, and The sensor 31 can detect the amount of pollution in indoor air without being influenced by air originating outdoors. Therefore, it is possible to appropriately adjust the ventilation amount according to the amount of indoor air pollution, thereby improving ventilation efficiency and quickly removing indoor air pollution.

Note that the air supply control unit 21 may swing the baffle plate 16 within the range described above. By doing so, the indoor air in the room 1 is stirred, and the indoor sensor 31 can detect pollution occurring in the indoor space at an early stage.

In the configuration example described here, the air supply control unit 21 of the ventilation device 10 is provided so as to be able to communicate with other ventilation equipment 50. The other blower device 50 here refers to a blower device different from the ventilation device 10 that is installed in the indoor space of the room 1. The air supply control unit 21 specifies the air blowing direction of the air blowing device 50 through communication with the air blowing device 50 . Then, the air supply control unit 21 controls the orientation of the air guide plate 16 according to the specified air blowing direction of the air blowing device 50. More specifically, the air supply control unit 21 orients the air guide plate 16 so that the direction of the wind blown from the indoor air supply port 15 obstructs the wind flowing from the blower device 50 toward the indoor sensor 31 . In other words, the air guide plate 16 directs the wind blown out from the indoor air supply port 15 in a direction that obstructs the wind from other blowing devices 50 installed in the indoor space of the room 1 toward the indoor sensor 31 . By doing so, it is possible to suppress the wind blown out from the indoor air supply port 15 from going directly to the indoor sensor 31 due to the air blowing from other blowing devices 50 .

In addition, the case where the direction of the baffle plate 16 can be changed within a preset range has been described above. However, the orientation of the baffle plate 16 may be fixed. In this case, the baffle plate 16 is fixed so that the direction of the wind blown out from the indoor air supply port 15 is directed toward the peripheral edge of the panel portion 14. At this time, it is even better if the air guide plate 16 is fixed so that the direction of the wind blown from the indoor air supply port 15 forms an acute angle with respect to the ceiling surface. Further, the baffle plate 16 and the panel portion 14 may be integrally formed.

Next, another example of the configuration of the above-mentioned wind shielding means of the ventilation system 10 will be explained. In this other example, the aforementioned wind shielding means includes a wind shielding plate 19 as shown in FIG. 5 together with the wind guiding plate 16 or in place of the wind guiding plate 16. What is shown in the figure is a configuration example in which the above-mentioned wind shielding means includes a wind shielding plate 19 instead of the wind guide plate 16. In this configuration example, a wind shielding plate 19 is fixedly provided between the indoor air supply port 15 and the indoor sensor 31. The wind shielding plate 19 is arranged between the indoor air supply port 15 and the indoor sensor 31 in the panel section 14 so as to surround the indoor sensor 31. The wind shield plate 19 is provided to extend vertically downward from the panel portion 14. The lower side of the indoor sensor 31 is open, and the indoor sensor 31 is in contact with the indoor air of the room 1 via this open part. The wind shielding plate 19 configured as described above can also block the wind blown out from the indoor air supply port 15 and directly directed toward the indoor sensor 31.

Further, another example of the arrangement of the indoor air supply port 15 and the indoor sensor 31 in the panel section 14 in the ventilation device 10 of this embodiment will be described with reference to FIG. 6. The figure shows a configuration example in which three indoor air supply ports 15 are formed in the panel section 14. In this example, the panel portion 14 has a rectangular shape with four rounded corners. Three indoor air supply ports 15 are arranged along each of the three sides of the panel section 14. Further, an indoor sensor 31 is arranged inside one remaining side of the panel section 14. In this case, as shown by the arrow in the figure, the direction of the air guide plate 16 is such that the direction of the air blown from the indoor air supply port 15 is directed toward the peripheral edge of the panel section 14 on the opposite side from the indoor sensor 31. Make it.

In addition, above, the case where the indoor sensor 31 was provided in the panel part 14 of the ventilation device 10 was demonstrated. However, the position of the indoor sensor 31 is not limited to this. The indoor sensor 31 may be located at a position closer to the indoor space of the room 1 than the indoor air supply port 15 and where it can come into contact with the air in the indoor space.

The ventilation device 10 according to this embodiment is connected to a terminal device 40 so as to be able to communicate in both directions. The communication method at this time may be either wired or wireless. The terminal device 40 is, for example, a personal computer installed in a user's house. Alternatively, for example, the terminal device 40 may be a mobile terminal such as a smartphone or a tablet terminal.

The terminal device 40 includes a display section 41 and an operation section 42. The display unit 41 is a liquid crystal display or the like that displays various information. When the terminal device 40 is a personal computer, the operation unit 42 is an input device such as a mouse (pointing device) and a keyboard of the personal computer. Further, when the terminal device 40 is a smartphone, the terminal device 40 includes a touch panel that serves as an operation section 42 and a display section 41.

The terminal device 40 can receive the detection result of the indoor sensor 31 from the air supply control section 21 and display the detection result of the indoor sensor 31 on the display section 41. Further, the terminal device 40 may be configured to receive the detection result of the outdoor sensor 32 from the air supply control section 21 and to display the detection result of the outdoor sensor 32 on the display section 41. By doing so, the user can easily understand the pollution status of indoor air and outdoor air.

The operation unit 42 of the terminal device 40 may be configured to allow input of an operation for specifying the amount and direction of air blown from the indoor air supply port 15. In this case, the operation details input to the operation unit 42 are transmitted to the air supply control unit 21. The air supply control unit 21 then controls the fan motor 18 and the baffle plate 16 according to the operation input to the operation unit 42 .

Embodiment 2.
Embodiment 2 of the present invention will be described with reference to FIG. FIG. 7 is a diagram schematically showing the configuration of a room in which a ventilation device is installed.

In the second embodiment described here, in the configuration of the first embodiment described above, the indoor sensor is arranged in the indoor space of the room at a position different from the panel section of the ventilation device. The ventilation system according to the second embodiment will be described below, focusing on the differences from the first embodiment. The configuration whose description is omitted is basically the same as that of the first embodiment. In the following description, structures similar to or corresponding to those of the first embodiment will be described with the same reference numerals used in the description of the first embodiment.

In the ventilation device 10 according to this embodiment, as shown in FIG. 7, the indoor air supply section of the ventilation device 10 includes a panel section 14 in which an indoor air supply port 15 is formed. The indoor sensor 31 is arranged at a different position from the panel section 14 in the indoor space of the room 1. In the configuration example described here, the indoor sensor 31 can be placed at any position in the indoor space of the room 1. However, the indoor sensor 31 may be fixed at a different position from the panel part 14 in the indoor space of the room 1.

Also in this embodiment, the ventilation device 10 includes an air supply control section 21, as in the first embodiment described above. The air supply control unit 21 is provided to be able to communicate with the indoor sensor 31. The air supply control unit 21 identifies the position of the indoor sensor 31 in the indoor space of the room 1 through communication with the indoor sensor 31 . In this sense, the air supply control unit 21 of this embodiment also serves as a sensor position detection means for detecting the position of the indoor sensor 31.

Then, the air supply control unit 21 adjusts the orientation of the air guide plate 16 in accordance with the specified position of the indoor sensor 31 so as to block the wind blown out from the indoor air supply port 15 and directly toward the indoor sensor 31. That is, in this embodiment as well, as in the first embodiment described above, the baffle plate 16 functions as a wind shielding means for blocking the wind blown out from the indoor air supply port 15 and directly directed toward the indoor sensor 31. There is. The air guide plate 16 changes the direction of the wind blown out from the indoor air supply port 15 according to the position of the indoor sensor 31.

Further, in the configuration example shown in FIG. 7, an exhaust section 60 is provided in the room 1. The exhaust section 60 is provided with a blower fan 17 and a fan motor 18 (not shown). The air supply control unit 21 operates the fan motor 18 so that the indoor air in the room 1 is exhausted outdoors from the exhaust unit 60 by the ventilation fan 17 . As a result, the pressure in the indoor space of the room 1 decreases, and an air flow is generated that flows from the outside air inlet 13 through the inside of the casing 11 to the indoor air supply port 15. By changing the rotational speed of the blower fan 17, the amount of air blown out from the indoor air supply port 15 can be changed. In this way, the blower fan 17 and the like serving as air supply amount changing means for changing the amount of air blown out from the indoor air supply port 15 may be provided at a location other than the casing 11 of the ventilation device 10.

The ventilation apparatus 10 configured as described above can also achieve the same effects as in the first embodiment. Furthermore, by making it possible to arrange the indoor sensor 31 at a location other than the panel section 14 provided on the ceiling 2 of the room 1, it is possible to prevent contaminants that are difficult to reach the ceiling 2, such as dust kicked up during cleaning operations, etc. The amount of contamination can be detected by indoor sensor 31. In addition, by allowing the indoor sensor 31 to be placed at any position in the indoor space of room 1, the user can place the indoor sensor 31 in a location where it is easy to detect contamination according to the usage status of room 1, etc. It is possible to efficiently ventilate indoor air.

1 Room 2 Ceiling 3 People 4 Pollutants 10 Ventilation system 11 Housing 12 Duct 13 Outside air intake 14 Panel section 15 Indoor air supply port 16 Air guide plate 17 Blow fan 18 Fan motor 19 Wind shield plate 20 Control device 21 Air supply control Section 22 External information acquisition section 31 Indoor sensor 32 Outdoor sensor 33 Human detection sensor 40 Terminal device 41 Display section 42 Operation section 50 Air blower device 60 Exhaust section

Claims (6)

an indoor air supply section formed with an indoor air supply port for blowing air supplied from the outdoors into the indoor space;
an indoor sensor that detects the amount of air pollution in the indoor space;
supply air amount changing means for changing the amount of air blown out from the indoor air supply port according to the detection result of the indoor sensor;
comprising a wind shielding means for blocking wind blowing out from the indoor air supply port and directly heading towards the indoor sensor ;
The indoor air supply section includes a panel section in which a plurality of indoor air supply ports are formed and arranged on the ceiling of the indoor space,
The indoor sensor is provided in the panel section,
The plurality of indoor air supply ports are arranged closer to the periphery of the panel than the indoor sensor,
The wind blocking means includes a wind guide plate that changes the direction of wind blown out from the indoor air supply port,
The air guide plate is capable of changing the direction of the air blown from the indoor air supply opening in a range from vertically downward to the ceiling surface to toward the peripheral edge of the panel part, and the direction of the air blown from the indoor air supply opening is adjustable. The ventilator is oriented in such a way as to obstruct wind from other blowing equipment installed in the indoor space toward the indoor sensor . 2. The ventilation system according to claim 1 , wherein the wind blocking means further includes a wind blocking plate provided in a fixed direction between the indoor air supply port and the indoor sensor. The ventilation device according to claim 1 or 2 , wherein the indoor sensor detects one or more of dust concentration, carbon dioxide concentration, odor concentration, and VOC concentration as the amount of air pollution in the indoor space. further comprising outdoor pollution amount acquisition means for acquiring the outdoor air pollution amount,
4. The air supply amount changing means changes the amount of air blown from the indoor air supply opening according to the detection result of the indoor sensor and the acquisition result of the outdoor pollution amount acquisition means. Ventilation equipment as described in. The ventilation system according to claim 4 , wherein the outdoor pollution amount acquisition means includes an outdoor sensor that detects one or more of dust concentration, carbon dioxide concentration, odor concentration, and VOC concentration as the outdoor air pollution amount. . 6. The ventilation system according to claim 4 , wherein the outdoor pollution amount acquisition means includes external information acquisition means for acquiring information regarding the outdoor air pollution amount from the outside.

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