WO2022050484A1

WO2022050484A1 - Outdoor facility filled with purified air and preventing droplet propagation therein

Info

Publication number: WO2022050484A1
Application number: PCT/KR2020/014561
Authority: WO
Inventors: 이건홍; 허수경; 이도재
Original assignee: 주식회사 엔쓰컴퍼니
Priority date: 2020-09-03
Filing date: 2020-10-23
Publication date: 2022-03-10
Also published as: KR102317042B1

Abstract

Disclosed is an outdoor facility configured to be filled with purified air and to prevent droplet propagation therein. The outdoor facility of the present invention forms an enclosed space which is filled with clean air and which allows people to enter and exit, thereby providing a space safe from fine dust, and the outdoor facility can effectively block droplet propagation between people by creating a vertical downdraft that prevents droplets emitted by people inside the facility from being propagated to others.

Description

An outdoor facility that is filled with purified air and is implemented to prevent the spread of droplets from inside

The present invention relates to an outdoor facility that is installed outdoors and is a closed space filled with purified air that is distinct from outdoor air, and has an air flow that flows downward in the inner space to prevent the spread of infectious diseases due to droplet propagation between people who enter and exit. .

Spaces installed on the streets of the city center, for example, 'Pagora' and facilities such as booths installed on bus platforms, are public facilities used by several people, so they are made in an unsealed state so that people can come and go freely. It was a space made available.

However, as air pollution in the city center became severe and fine dust increased, there was a need for a space filled with clean air that people could freely enter and exit. For example, the structure of a bus stop is the same. Therefore, an entrance door is installed and a booth space filled with air purified by an air purifier is being designed.

On the other hand, an enclosed space to which an unspecified number of people can enter can be a structure opposite to social distancing measures to prevent the spread of infectious diseases that are recently prevalent. Infectious diseases caused by virus transmission are known to be transmitted directly or indirectly through droplets, which are secretions from people's mouths and noses. Part of the droplets secreted from a person's mouth or nose are discharged forward in a parabolic shape, while another part floats in the air and enters other people's respiratory tract as it falls, and some falls straight down in a steep parabola. Pray. Among them, it is known that the main factor in the spread of infectious diseases is flying forward or floating in the air.

An object of the present invention is to provide an outdoor facility that is installed outdoors and is a closed space filled with purified air that is distinct from outside air, and has an air flow flowing downward in the inner space to prevent the spread of infectious diseases due to droplet propagation between people who enter and exit. is in providing.

In order to achieve the above object, the present invention provides an outdoor facility that can be installed outdoors and filled with purified air to block the propagation of droplets between people in the interior space.

An outdoor facility of the present invention includes: an exhaust fan for supplying air to a ceiling portion of the inner space; the ceiling portion filled with the air supplied by the exhaust fan (a plurality of ceiling exhaust ports are provided in the ceiling portion toward the inner space); A side wall part having a built-in side wall circulation part that forms the internal space together with the ceiling part, a lower surface circulation port connected to the inner space is provided at the lower side, and connects the lower surface circulation port and the exhaust fan to form a circulation path of air Wow; an air purifier for sterilizing viruses contained in the air introduced into the sidewall circulation unit and purifying dust; and a blower for circulating the air filled in the inner space to the exhaust fan by sucking the air introduced into the sidewall circulation unit at a preset wind speed. Here, the ceiling exhaust port discharges the purified air in a vertical direction to generate a vertical descending airflow of purified air in the entire inner space, and the blower is a vertical descending airflow of purified air formed in the entire interior space. A vertical descending airflow is formed in the internal space by sucking air in the internal space at a wind speed sufficient to convert the propagation of droplets in the vertical direction in the internal space.

According to an embodiment, it is preferable that the plurality of ceiling exhaust ports are spaced apart from each other at regular intervals and are disposed over the entire lower surface of the ceiling facing the interior space to discharge air purified by a surface spray method to the interior space.

Splash prevention mode when the door is opened

According to another embodiment, the outdoor facility of the present invention, a circulation unit door for opening and closing the lower surface circulation port; an openable and openable intake port provided on the outside of the side wall part; an entrance door provided on one side of the side wall to open and close the inner space; The sensor may further include a sensor for recognizing the opening and closing of the door: when it is confirmed that the door is opened by reading the sensor, the control unit closes the circulation unit door and opens the intake port to control so that outside air flows into the exhaust fan can

According to another embodiment, when it is confirmed that the door is opened by reading the sensor, the control unit opens the intake port in a state in which the circulation unit door is opened to allow the air and outside air circulated from the interior space by the exhaust fan can be controlled to flow simultaneously.

Air conditioner for spraying cotton

According to another embodiment, the outdoor facility further includes an air conditioner that circulates a refrigerant including an evaporator, a compressor, a condenser, and an expansion valve, cools the air passing through the air purifier and supplies it to the exhaust fan by performing a phase change can do.

According to an embodiment, the exhaust fan may be included as a component of the air conditioner that blows the purified air to the side toward the evaporator to fill the ceiling with the purified and cooled air. In this case, the air conditioner may be disposed in the center of the ceiling part. The exhaust fan is implemented as a centrifugal fan that discharges the purified air blown by the blower along the entire outer periphery of the circular rotating vehicle and is cooled by blowing it into the evaporator, and the evaporator has a donut shape surrounding the exhaust fan. desirable.

The outdoor facility of the present invention can provide a safe space from fine dust by creating a closed space that is filled with clean air inside and accessible to people, and prevents the droplets emitted by people inside from spreading to others. It can effectively block the spread of droplets between people by creating an airflow. Accordingly, even though the outdoor facility provides an enclosed space, it is possible to prevent the spread of infectious diseases among people located inside.

Even if the door is opened while operating in the anti-splash mode, the outdoor facility of the present invention can maintain the anti-splash effect by controlling the air flow in the internal space not to change, as well as maintaining the required air pressure.

The air conditioner used in the outdoor facility of the present invention can be implemented with an external circulation ventilation structure, and can effectively reduce energy consumption for air purification and cooling by being implemented with a bet circulation structure.

1 is an external view of an outdoor facility according to an embodiment of the present invention;

Figure 2 is a cross-sectional view showing the air flow in the outdoor facility of Figure 1,

3 is a cross-sectional view of an outdoor facility according to another embodiment of the present invention;

4 is a cross-sectional view showing the air flow of the outdoor facility of FIG. 3 when the door is closed;

5 is a view conceptually showing the air flow of the outdoor facility of FIG. 3 when the door is opened;

6 is a view showing the structure and form of an air conditioner applied to the present invention, and

7 is a cross-sectional view of an outdoor facility according to another embodiment of the present invention.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

1 and 2, the outdoor facility 100 of the present invention is installed outdoors, in particular, in a plaza or pedestrian path that people can access, a sidewalk facing the road, etc., and the inner space 101 is It can be open or closed. In terms of air flow, the outdoor facility 100 of the present invention may operate in any one selected from the bet circulation mode and the outdoor air circulation mode, and may receive and circulate the circulating air and the outdoor air at the same time as necessary.

The outdoor facility 100 includes a ceiling portion 110 that becomes the ceiling of the inner space 101, a side wall portion 130 that seals the inner space 101 while supporting the ceiling portion 110, and the inner space 101. It includes an air conditioner 150 for generating cooling air and a control unit 170 for controlling the overall operation, and the side wall 130 is installed on the floor, so that it becomes an outdoor facility as a whole together with the ceiling 110 . The door 131 is installed on one side of the side wall 130 to open and close the inner space 101 . Although the side wall portion 130 of FIG. 1 is illustrated as having a rectangular plane, it is not limited thereto.

The outdoor facility 100 operates in any one selected from the bet circulation mode and the outdoor air circulation mode, and basically operates in the bet circulation mode. In the circulation mode, air circulates in the air conditioner 150 → the ceiling 110 → the inner space 101 → the side wall 130 → the air conditioner 150 .

At least one ceiling exhaust port 111 for discharging cooling air to the interior space 101 is provided in the ceiling portion 110 . The cooling air supplied by the air conditioner 150 is introduced into the interior space of the ceiling part 110 , and then is supplied to the interior space 101 by a surface spray method through the ceiling exhaust port 111 while moving along the ceiling part 110 .

The side wall part 130 has a built-in side wall circulation part 131 that circulates the air filled in the internal space 101 by connecting the internal space 101 and the exhaust fan 151 of the air conditioner 150 . The side wall circulation unit 131 may be made over the entire side wall unit 130 or may be implemented in a separate pipe form. The side wall 130 has an air purification unit 135 that is connected to the side wall circulation unit 131 to sterilize viruses contained in the circulating air and remove fine dust to purify the air, and a set wind speed for the sterilized and purified circulating air. A blower 141 that sucks in and circulates to the air conditioner 150 is built-in. The lower side circulation port 133 provided at one end of the side wall circulation unit 131 is provided at the lower side of the side wall unit 130 facing the inner space 101 to connect the inner space 101 and the side wall circulation unit 131 . A circulatory pathway is formed. In the circulation mode, the cooling air discharged to the inner space 101 is introduced into the side wall circulation unit 131 through the lower surface circulation port 133 by the blower 141 and then circulates while being supplied to the air conditioner 150 again. The circulation mode operates as an anti-splash mode in the present invention, which will be described again below.

The air conditioner 150 receives circulated air and/or external air circulated through the sidewall circulation unit 131 , cools it to a set temperature, and then supplies the cooled air to the ceiling unit 110 . The structure or operation method of the air conditioner 150 may apply any conventionally known cooling method, cooling structure, or cooling mechanism.

The air conditioner 150 may be installed anywhere inside or outside the outdoor facility 100 . In the example of FIG. 1 , the air conditioner 150 is shown in a form accommodated in the ceiling part 110 , but may be installed exposed outside the ceiling part 110 , may be installed on one side of the side wall part 130 , or the side wall part 130 . ) may be installed on the outside or inside floor.

However, as will be described below, in order to uniformly supply cooled air to the entire interior of the ceiling unit 110 , the air conditioner 150 is preferably provided in the center of the ceiling unit 110 . Alternatively, it is necessary to provide a separate exhaust fan in the ceiling part 110 to uniformly supply cooling air supplied by the air conditioner 150 placed at a location other than the ceiling part 110 to the inside of the ceiling part 110 as a whole.

When the air conditioner 150 is provided in the center of the ceiling part 110, in the circulation mode, the air is supplied by the air conditioner 150 → the ceiling part 110 → the inner space 101 → the side wall part 130 → the ceiling part 110 → the air conditioner 150. ) cycle through Also, as shown in FIG. 2 , a ceiling circulation unit ( ) is provided in the ceiling unit 110 , which continues from the side wall circulation unit 131 and transfers the circulating air to the exhaust fan 151 of the air conditioner 150 , thereby forming a double bulkhead structure.

When the air conditioner 150 is disposed in the middle of the ceiling part 110 as shown in FIG. 1 , an exhaust fan 151 for discharging air in all directions 360 degrees is provided in order to evenly supply the cooled air to the entire ceiling part 110 . It is preferable to do As will be described below again, an exhaust fan 151 in the form of a centrifugal fan is provided inside the circular evaporator ( ), and the exhaust fan 151 supplies cooling air in a 360-degree direction, so that the ceiling 110 provides an even air pressure as a whole. It can be filled with cooled air from In addition, in order to maintain a constant wind speed of the cooling air in the internal space 101 , the wind speed generated by the exhaust fan 151 should be equal to or greater than the wind speed generated by the blower 141 .

The air purification unit 135 sterilizes viruses contained in the circulating air circulated to the sidewall circulation unit 131 and purifies the dust. For the air purifier 135 , for example, a filter 137 capable of filtering out fine dust and a UV lamp 139 capable of sterilizing viruses and bacteria may be used.

The blower 141 is provided between the air purifier 135 and the air conditioner 150 to circulate the air filled in the internal space 101 back to the air conditioner 150 .

The control unit 170 controls the overall operation of the outdoor facility 100 of the present invention. The control of the controller 170 includes control of the cooling temperature of the air conditioner 150, the blowing control of the blower 141, the operation control of the air purifier 135, and the opening and closing control of the lower circulation port 133, which will be described below. Controls the overall operation of the outdoor facility 100, including In particular, the control unit 170 can control the characteristic splash prevention mode of the present invention.

Droplet diffusion blocking structure and droplet prevention mode to prevent the spread of infectious diseases

The outdoor facility 100 of the present invention may be used with the door 131 opened, or may operate in an outdoor air circulation mode. In the outdoor air circulation mode, the outdoor air is supplied to the air conditioner 150 through an intake port that is provided on the outside of the side wall 130 and opened and closed. However, the outdoor facility 100 of the present invention operates in a betting circulation mode in a state in which the door 131 is closed and the inner space 101 is sealed, so that droplets emitted by people located in the inner space 101 are transmitted to other people. It is characterized by creating an air flow that prevents propagation and creating a safe space from external fine dust. Among the droplets secreted from a person's mouth or nose, the main factor in spreading infectious diseases is flying forward or floating in the air. The outdoor facility 100 of the present invention creates a vertical descending airflow from the ceiling 110 toward the floor in the entire interior space 101, so that the vertical descending airflow of the cooling air prevents the propagation of droplets in the interior space 101. The droplet does not float forward or into the air by acting as a pressing force to divert downwards.

Referring to FIG. 2 , first, the ceiling part 110 is implemented in the form of a chamber filled with cooling air supplied by the air conditioner 150 , and the lower surface of the ceiling part discharges the cooling air over the entire surface facing the internal space 101 . A plurality of ceiling exhaust ports 111 are provided. In other words, the method in which the ceiling part 110 sprays the cooling air into the inner space 101 should be a surface spray method, and should not be a method in which the cooling air is sprayed through a point or an edge of the ceiling of the inner space.

For the surface injection method, the cooled air discharged by the air conditioner 150 is filled in the ceiling part 110 and then discharged to the internal space 101 through the ceiling exhaust port 111 . The ceiling exhaust port 111 is provided evenly over the entire ceiling of the internal space 101 , that is, the entire floor of the ceiling part 110 , so that the cooled air filled in the ceiling part 110 is discharged over the entire internal space 101 . The ceiling exhaust port 111 may be implemented in various forms. For example, the ceiling exhaust port 111 may be provided in a form in which a mesh or fine nozzles are evenly arranged over the entire bottom surface of the ceiling unit 110 , as shown in FIG. 2 , of the ceiling unit 110 facing the interior space 101 . It may be provided in the form of a plurality of slits spaced apart from each other at regular intervals over the entire bottom surface. Even if the plurality of slits are spaced apart from each other by a predetermined interval, the air discharged from the slits spreads evenly in the downward direction while spreading to a certain extent.

In addition, the ceiling exhaust port 111 is implemented to discharge the cooled air in a vertical direction, so it is important to create a vertical descending airflow of the cooling air from the ceiling to the floor over the entire interior space 101 . The cooled air discharged from the ceiling exhaust port 111 forms a vertical downdraft over the entire internal space 101, and the vertical downdraft in the internal space 101 acts on droplets secreted from people, so that the droplets move downward. will receive power from In other words, secretions discharged from people's mouths or noses do not fly forward or fly into the air, but move downwards by a vertical force, thereby blocking the spread of viruses and the like between people.

In addition, in order for the vertical downdraft of the cooled air in the inner space 101 to block the propagation of the droplet, a downdraft sufficient to change the travel direction of the droplet is continuously required. The downward airflow of the cooling air in the inner space 101 is determined by the exhaust fan 151 and the blower 141 . The exhaust fan 151 and the blower 141 have a wind speed such that the vertical descending airflow of cooling air formed in the entire internal space 101 diverts the propagation of the droplets in the internal space 101 downward in the internal space 101. The air inside should be circulated, and the amount of air corresponding to the volume of the internal space 101 should be circulated. At this time, the required wind speed of the cooling air in the internal space 101 (hereinafter referred to as 'splash prevention mode wind speed') can be obtained experimentally, and the exhaust fan 151 and the blower 141 are the required wind speed of the splash prevention mode. It is possible to determine the number of revolutions per minute (RPM) (hereinafter referred to as 'splash prevention mode rotation speed') corresponding to the wind speed having a value equal to or greater than . In general, since the blowing of the exhaust fan 151 of the air conditioner 150 is controlled at a number of preset revolutions per minute, the control unit 170 operates in the splash prevention mode and operates the blower 141 as 'splash'. It is generally desirable to operate at the prevent mode rotational speed.

Splash prevention mode when the door is opened

When the door 131 is opened while operating in the betting circulation mode, that is, the splash prevention mode, a part of the cooled air escapes to the outside through the door 131, and as a result, a negative pressure generated in the inner space 101 is generated while the outside air is opened. can be introduced. The external air may contain fine dust, and the internal space 101 may be polluted, and the droplet propagation prevention may not work properly as the downdraft of cooling air is disturbed by the inflow of external air. Cooling supplied from the ceiling 110 Since there is air, the amount of air lost according to the opening of the door is larger than that of outside air, and the amount of circulating air flowing into the sidewall circulation unit 131 is reduced accordingly, and the cooling supplied by the ceiling unit 110 to the inner space 101 . The amount of air also decreases. 3 shows an outdoor facility 300 further including a configuration for solving this condition.

Referring to FIG. 3 , in the outdoor facility 300 of the present invention, in addition to the outdoor facility 100 of FIG. 1 , an openable and openable circulation door 301 is provided in the lower circulation port 133 , and a side wall portion 130 . An openable and openable intake port 303 through which outside air is introduced is provided, and a sensor 305 capable of recognizing the opening and closing of the door is attached to the door 131 .

The circulation door 301 may be implemented in the form of a damper operated by a motor driving, a sliding door, or the like. The intake port 303 may also be implemented as a damper operated by a motor drive.

On the other hand, since the circulation door 301 is closed, the inside circulation path is closed and only outside air is introduced, so the intake port 303 may be implemented as a damper in the form of connecting one of the circulating air and the outside air toward the air conditioner 150 . there is. 3, the intake port 303 is provided between the filter 137 and the blower 141 of the air purification unit 135 to prevent outside air from passing through the filter 137, but it is provided in front of the filter 137 and the filter 137 ) can also be implemented to pass

When it is confirmed that the door 131 is opened by reading the sensor 305, the control unit 170 closes the lower circulation port 133 by operating the circulation port door 301, and opens the intake port 303 to introduce outside air. Then, the blower 141 is operated at a speed obtained by adding the additional rotation speed to the 'splash prevention mode rotation speed'. Accordingly, it is switched from the betting circulation mode to the outdoor air circulation mode as shown in FIG. In the outdoor air circulation mode, air flows from outside air → air conditioner 150 → ceiling part 110 → internal space 101 .

Referring to FIG. 5 , the cooling air provided from the ceiling part 110 in a state in which the door 131 is opened makes the internal space 101 into a relatively high-density space compared to the outside air. If the expansion occurs and the cooled air is continuously discharged through the ceiling part 110 , the movement of air from the internal space 101 to the surroundings becomes the main air flow, and the inflow of air from the outside into the internal space 101 is negligible. can be In other words, even if the door 131 is opened and the inner space 101 is not sealed, it becomes a space filled with cooled air. Therefore, even when the door 131 is opened, it is possible to prevent the air polluted with fine dust from flowing into the inner space 101 . In addition, since the downdraft in the vertical direction is maintained as it is, the effect of blocking the transfer of droplets between people is also maintained.

According to another method, the intake port 303 may be configured to pass both the circulated air and the outside air, and thus both the air circulated in the inner space 101 and the outside air may be supplied to the air conditioner 150 .

Structure of air conditioner for cotton spray

The

outdoor facilities

100 and 300 of FIGS. 1 and 3 must evenly supply cooling air to the entire interior space 101 by a surface spray method through the ceiling exhaust port 111, and as a result, from the entire interior space 101 It should be able to create a vertical downdraft. To this end, the air conditioner 150 needs to evenly supply cooling air into the ceiling part 110 .

Referring to FIG. 6 , the exhaust fan 151 is implemented as a centrifugal fan that discharges air introduced by the blower 141 along the entire outer periphery of the circular rotating vehicle. The introduced air is blown toward the evaporator 153 by the exhaust fan 151 . The evaporator 153 cools the air blown by the exhaust fan 151 and discharges it to the outside. Similarly, the fan 609 for the condenser is implemented as a centrifugal fan that discharges the upper air introduced through the upper intake port along the entire outer periphery of the circular rotary vehicle. The condenser 607 is provided in a donut shape surrounding the fan 609 for the condenser. When the condenser fan 609 operates and blows the upper air toward the condenser 607, the condenser 607 heats the upper air blown by the condenser fan 609 and discharges it to the outside.

The rotation difference used in the exhaust fan 151 and the fan 609 for the condenser may have various forms. A backward fan inclined in the direction opposite to the direction of rotation of the rotating vehicle or a forward fan inclined in the direction of rotation may be used. However, as compared to a forward fan in which air is discharged in a direction normal to the rotation of the rotating vehicle, a backward fan in which air is discharged in a direction perpendicular to the rotation axis is preferable. In addition, a radial fan in which the blades of the rotary vehicle are perpendicular to the rotation axis may be used.

When the air conditioner 150 is operated by the control unit 170, air circulation is also performed in the

outdoor facilities

100 and 300 of the present invention.

another embodiment

In the outdoor facility of the present invention, the air conditioner 150 may not be an essential component. In other words, the bet circulation mode (splash prevention mode) and the outdoor air circulation mode of the present invention can operate even if the air that makes the vertical descending airflow in the inner space 101 is not the cooling air cooled to a constant temperature. However, a fan to replace the exhaust fan 151 of the air conditioner 150 is required as it is.

The outdoor facility 700 of FIG. 7 has the same configuration as the

outdoor facilities

100 and 300 of FIGS. 1 and 3 , except that the air conditioner 150 is not provided. However, the exhaust fan 151 is included as it is.

In this case, when the door 131 is closed and the internal space 101 is sealed, the exhaust fan 151 → the ceiling part 110 → the internal space 101 → the lower surface circulation port 133 → the air purification unit 135 → Blower (141) → Purified air is circulated along the path to the exhaust fan (151). Compared to the

outdoor facilities

100 and 300 of FIGS. 1 and 3 , it is not cooled air, but can be described as the same air flow.

When the door 131 is opened, since the air provided from the ceiling 110 is not high-density cooling air compared to the outside air, the internal space 101 becomes a high-density space compared to the outside or the air expands toward the low-density air outside. It does not occur as a main phenomenon. Nevertheless, as the air is continuously discharged through the ceiling 110 and the vertical downdraft is maintained as it is, the movement of air from the inner space 101 to the surroundings becomes the main air flow, and the air inflow from the outside into the inner space 101 is relatively negligible. In other words, even if the door 131 is opened and the inner space 101 is not sealed, it becomes a space in which the vertical downdraft is maintained. Therefore, since the downdraft in the vertical direction is maintained as it is, the effect of blocking the transfer of droplets between people is also maintained.

In the above, preferred embodiments of the present invention have been illustrated and described, but the present invention is not limited to the specific embodiments described above, and it is common in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the claims. Various modifications may be made by those having the knowledge of, of course, and these modifications should not be individually understood from the technical spirit or perspective of the present invention.

Claims

As a facility that forms an interior space with an entrance door installed and is installed outdoors,

an exhaust fan for supplying air to the ceiling of the inner space;

the ceiling portion filled with air supplied by the exhaust fan; A plurality of ceiling exhaust ports are provided in the ceiling portion toward the inner space.

A side wall part having a built-in side wall circulation part that forms the internal space together with the ceiling part, a lower surface circulation port connected to the inner space is provided at the lower side, and connects the lower surface circulation port and the exhaust fan to form a circulation path of air ;

an air purifier for sterilizing viruses contained in the air introduced into the sidewall circulation unit and purifying dust; and

and a blower that circulates the air filled in the inner space to the exhaust fan by sucking the air introduced into the side wall circulation unit at a preset wind speed,

The ceiling exhaust port discharges the air purified by the air purifier in a vertical direction to generate a vertical descending airflow in the entire interior space,

The blower is an outdoor facility, characterized in that the vertical descending air flow formed in the entire internal space sucks the air in the internal space at a wind speed that converts the propagation of droplets in the internal space in a vertical direction.
According to claim 1,

The plurality of ceiling exhaust ports are spaced apart from each other at regular intervals and are disposed over the entire lower surface of the ceiling facing the interior space to discharge air purified by a surface spray method to the interior space.
According to claim 1,

a circulation part door that opens and closes the lower circulation port;

an openable and openable intake port provided on the outside of the side wall part;

an entrance door provided on one side of the side wall to open and close the inner space; and

A sensor for recognizing the opening and closing of the door: and

When it is confirmed that the door is opened by reading the sensor, the outdoor facility further comprises a control unit that closes the circulation unit door and opens the intake port to control the inflow of outside air to the exhaust fan.
4. The method of claim 3,

When it is confirmed that the door is opened by reading the sensor, the control unit opens the intake port in a state in which the circulation unit door is open to control so that the air circulated from the inner space and the outside air are simultaneously introduced into the exhaust fan Features outdoor facilities.
According to claim 1,

The outdoor facility of claim 1, further comprising: an air conditioner that circulates a refrigerant including an evaporator, a compressor, a condenser, and an expansion valve, performs a phase change, cools the air passing through the air purifier, and supplies it to the exhaust fan.
6. The method of claim 5,

The exhaust fan is included as a component of the air conditioner that blows the purified air to the side toward the evaporator to fill the ceiling with purified and cooled air.
7. The method of claim 6,

The air conditioner is disposed in the center of the ceiling portion,

The exhaust fan is implemented as a centrifugal fan that discharges the purified air blown by the blower along the entire outer periphery of the circular rotary car, and cools it by blowing it into the evaporator,

The evaporator is an outdoor facility, characterized in that provided in a donut shape surrounding the exhaust fan.