KR102246239B1 - Air purge sterilization system - Google Patents

Abstract

The present invention relates to an indoor air purification and harmful virus sterilization system for a large space, which comprises: a central air inflow unit; a plurality of side air inflow units; a plurality of dummy air inflow units; a plurality of air purification and sterilization units; a plurality of purified air discharge units; a plurality of purified air guide units; a plurality of strainers; a signal input unit; and a system controller.

Description

Indoor air purification and harmful virus sterilization system in large spaces {Air purge sterilization system}

The present invention relates to a system for purifying indoor air in large spaces and sterilizing harmful viruses, and more specifically, suitable for application to indoor large spaces of buildings, and can easily and effectively sterilize harmful viruses as well as air purification indoors in large spaces. It relates to a large space indoor air purification and harmful virus sterilization system.

Indoor spaces such as companies and commercial buildings have long been operated with efficient thermal insulation and cooling systems.

However, due to the increasing air pollution and indoor air pollution, it is becoming more important to secure a clean and clean living space as well as efficient warming and cooling in the future.

In particular, when yellow dust or fine dust is becoming more severe as in recent years, while contamination by various bacteria and viruses increases, it is most important to purify the indoor air and sterilize harmful viruses.

Accordingly, the air purifier 10 as shown in FIG. 1 is widely used. The air purifier 10 of FIG. 1 has a series of structures that filter foreign matter in external air introduced through an internal filter and discharge purified air through a fan.

On the other hand, the air purifier 10 as shown in Fig. 1 or different in shape from Fig. 1, a general air purifier is a popular type, so it can be easily purchased, and it is convenient to place it on the room or floor of a home, but it has a small capacity, so it is an exhibition hall, etc. It is not suitable for indoor air purification or sterilization of harmful viruses in large spaces.

Therefore, although it is being disclosed in some systems suitable for the interior of large spaces, considering that the existing system has a lot of difficulty in practical application due to its low efficiency compared to the facility cost or facility structure, it is a new concept of a large space interior that is not known before. There is a need for air purification and harmful virus sterilization systems.

Korean Intellectual Property Office Application No. 10-2018-0115527 Korean Intellectual Property Office Application No. 10-2004-0095345

An object of the present invention is to provide a system for indoor air purification and harmful virus sterilization in large spaces, which is suitable for application to large spaces indoors of buildings and can easily and effectively sterilize harmful viruses as well as air purification in large spaces. .

The object is a central air inlet unit provided in a central area of the ceiling of the interior of a large space of a building, and through which upper air of the interior of the large space is introduced; A plurality of side air inlet units provided in the side area of the ceiling and through which upper air of the indoor side area of the large space is introduced; A plurality of dummy air inlet units provided on the ceiling in a region between the central air inlet unit and the side air inlet units and through which upper air in the dummy region between the center and the side of the large space is introduced; A plurality of air purification combined sterilization units coupled to the central air inlet unit, the side air inlet unit, and the dummy air inlet unit, respectively, and purifying air introduced from a corresponding region and sterilizing harmful viruses; A plurality of purified air discharge units for discharging the purified and sterilized air through the plurality of air purification combined sterilization units to the floor of the interior of the large space; It is arranged to surround the outside of the interior of the large space and is connected to the plurality of air purification combined sterilization units and the plurality of purified air discharging units, and the purified and sterilized air is purified through the plurality of air purification combined sterilization units. A plurality of purified air guide units guiding to the air discharge unit; A plurality of strainers provided in the central air inlet unit, the side air inlet unit, the dummy air inlet unit, and the purified air outlet unit, respectively, for removing foreign substances in the air flowing along the unit; A signal input unit for inputting signals for individual operations of the plurality of air purification and sterilization units; And a system controller for controlling an operation of a corresponding one of the plurality of air purification combined sterilization units based on an input value of the signal input unit.

Provided for each location in the interior of the large space, further comprising a plurality of pollution level measurement sensors for measuring the pollution level of the area, and when the automatic control by the signal input unit is selected, the system controller senses the pollution level measurement sensors Based on the signal, it is possible to individually control the operation of the air purification and sterilization units at the corresponding location.

The air purification combined sterilization unit includes a sterilization unit casing; It is provided at one end of the sterilization unit casing and is connected to a corresponding one of the central air inlet unit, the side air inlet unit, and the dummy air inlet unit, and collects air delivered from the air inlet unit and guides it to the rear end. A first air guide; A first air duct connected to the first air guide; An air intake fan device rotatably provided in the first air duct, acting to suck air into the first air duct, and controlling an operation and speed by the system controller; A second air guide communicating with a rear end of the first air duct, collecting air in the first air duct and guiding it to a rear end, but having a width narrower than that of the first air guide; A purification module connected to the second air guide and purifying air delivered from the second air guide; An ultraviolet sterilization module connected to the purification module and sterilizing harmful viruses in the air for which purification is completed; A third air guide that is communicated to the rear end of the ultraviolet sterilization module and collects and guides the purified air that has been purified and sterilized to the rear end, but is manufactured to have the same width as the second air guide; A second air duct having both sides connected to the third air guide and the purified air guide unit; And a circulator device provided in the second air duct and forcibly blowing air in the second air duct toward the purified air guide unit, and controlling an operation and speed by the system controller.

Each of the central air inlet unit, the side air inlet unit, the dummy air inlet unit, and the purified air outlet unit further includes an opening degree-adjustable grille capable of adjusting the opening degree of air, wherein the opening degree-adjustable grille includes: Empty grill body; A grill net formed on the front surface of the grill main body to limit the inflow of foreign matter; An opening degree control plate operably provided in the grill mesh; And a knob coupled to the grill body and operating the opening degree control plate, wherein the strainer comprises: an air passage path through which air passes; And a foreign matter filtering net disposed to intersect with the air passage part and to filter foreign matter in the air passing through the air passage part, wherein the central air inlet unit, the side air inlet unit, and the dummy air inlet unit are all in plurality. It can take the structure of a branch pipe made of pipes.

According to the present invention, it is suitable for application to the interior of a large space of a building, and has the effect of being able to easily and effectively sterilize harmful viruses as well as purify the air inside the large space.

1 is a structural diagram of a general air purifier.
2 is a structural diagram of a system for purifying indoor air in a large space and sterilizing harmful viruses according to an embodiment of the present invention.
3 is a view showing air flow in the drawing of FIG. 2.
4 is a structural diagram of a sterilizing unit for both air purification.
5 is a structural diagram of a strainer.
6 and 7 are operation diagrams of an opening-adjustable grille.
8 is a control block diagram of the indoor air purification and harmful virus sterilization system of a large space of FIG. 2.
9 is a structural diagram of a system for purifying indoor air in a large space and sterilizing harmful viruses according to another embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to embodiments to be described later in detail together with the accompanying drawings.

However, the present invention is not limited to the embodiments disclosed below, but will be implemented in various different forms.

In the present specification, the present embodiment is provided to complete the disclosure of the present invention, and to completely inform the scope of the present invention to those of ordinary skill in the art to which the present invention pertains. And the invention is only defined by the scope of the claims.

Accordingly, in some embodiments, well-known components, well-known operations, and well-known techniques have not been described in detail in order to avoid obscuring interpretation of the present invention.

The same reference numerals refer to the same elements throughout the specification. In addition, terms used in the present specification (referred to) are for explaining embodiments and are not intended to limit the present invention.

In the present specification, the singular form also includes the plural form unless specifically stated in a written phrase. In addition, components and actions (actions) referred to as'comprising (or having)' do not preclude the presence or addition of one or more other components and actions.

Unless otherwise defined, all terms (including technical and scientific terms) used in the present specification may be used with meanings that can be commonly understood by those of ordinary skill in the art to which the present invention belongs.

In addition, terms defined in a commonly used dictionary are not interpreted ideally or excessively unless they are defined.

Hereinafter, a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

2 is a structural diagram of an indoor air purification and harmful virus sterilization system in a large space according to an embodiment of the present invention, FIG. 3 is a view showing air flow in the drawing of FIG. 2, and FIG. 4 is a structure of a sterilization unit for both air purification FIG. 5 is a structural diagram of a strainer, FIGS. 6 and 7 are operation diagrams of an opening-adjustable grill, and FIG. 8 is a control block diagram for the indoor air purification and harmful virus sterilization system of a large space of FIG. 2.

Referring to these drawings, the indoor air purification and harmful virus sterilization system in a large space according to the present embodiment is suitable for application to a large space indoor 101 of a building, while purifying air in a large space indoor 101 as well as harmful viruses. As to be easily and effectively sterilized, it may include a plurality of air inlet units 111 to 113, an air purification combined sterilization unit 120, a purified air discharge unit 140, and a purified air guide unit 135. . Here, the large space indoor 101 may mean a large space indoor 101 such as an exhibition hall.

The air inlet units 111 to 113 form a place where air is introduced into the large space indoor 101. These air inlet units 111 to 113 are provided in the central area of the ceiling part 104 of the interior 101 of the large space of the building, and the central air inlet unit 111 through which the upper air in the central area of the large space indoor 101 is introduced. And, provided in the side area of the ceiling part 104, a plurality of side air inlet unit 112, the central air inlet unit 111 and the side air inlet unit to which the upper air of the large space indoor 101 side area is introduced. It includes a plurality of dummy air inlet units 113 which are provided on the ceiling part 104 in the area between 112 and through which upper air in the dummy area between the center and the side of the large space indoor 101 is introduced.

The central air inlet unit 111, the side air inlet unit 112, and the dummy air inlet unit 113 all have a branch pipe structure made of a plurality of pipes. Accordingly, although the structure is simple, the efficiency of introducing air in the area where the central air inlet unit 111, the side air inlet unit 112, and the dummy air inlet unit 113 are located is good.

The air purification combined sterilization unit 120 is coupled to the central air inlet unit 111, the side air inlet unit 112, and the dummy air inlet unit 113, respectively, and purifies the air flowing in from the corresponding area while preventing harmful viruses. It serves to sterilize. The structures of the air purification combined sterilization unit 120 provided in the central air inlet unit 111, the side air inlet unit 112, and the dummy air inlet unit 113 are all the same as shown in FIG. 4.

The air purification combined sterilization unit 120 includes a sterilization unit casing 121 as an exterior structure, and the following components are mounted in the sterilization unit casing 121 for each position. As described above, since the following components are provided in the sterilization unit casing 121, there is an advantage that the installation or maintenance work of the device becomes much easier.

At one end of the sterilization unit casing 121, the central air inlet unit 111, the side air inlet unit 112, and the dummy air inlet unit 113 are connected to the corresponding ones, and the corresponding air inlet units 111 to 113 A first air guide 122 is provided to collect the air transmitted from the side and guide it to the rear end. Then, the first air duct 123 is connected to the first air guide 122.

An air intake fan device 124 rotatably provided so that air is sucked into the first air duct 123 is provided in the first air duct 123. The air intake fan device 124 on which the motor is mounted may be controlled by the system controller 190.

At the rear end of the first air duct 123, a second air guide 125 for collecting air in the first air duct 123 and guiding it to the rear end is provided in communication. At this time, the second air guide 125 is formed to be narrower than the first air guide 122 to induce a rapid air flow.

The second air guide 125 is provided with a purification module 126 that purifies the air delivered from the second air guide 125. In addition, an ultraviolet sterilization module 127 is connected to the purification module 126 to sterilize harmful viruses in the air for which the purification operation has been completed.

In this way, as both the purification module 126 and the ultraviolet sterilization module 127 are provided, the air passing through them is purified, while harmful viruses in the air can be sterilized. It is preferable that the purification module 126 and the ultraviolet sterilization module 127 are detachably attached to the corresponding positions for maintenance.

A third air guide 128 is provided at the rear end of the ultraviolet sterilization module 127 to collect purified air that has been purified and sterilized and guide it to the rear end. In this case, the third air guide 128 may be manufactured to have the same width as the second air guide 125.

A second air duct 129 is connected to the third air guide 128. That is, both sides of the second air duct 129 are connected to the third air guide 128 and the purified air delivery pipe 170.

In the second air duct 129, a circulator device 131 forcibly blowing air in the second air duct 129 toward the purified air guide unit 135 is mounted. The circulator device 131 on which the motor is mounted may be controlled by the system controller 190.

The purified air discharging unit 140 serves to discharge the purified and sterilized air through a plurality of air purification combined sterilization units 120 to the floor 105 of the interior 101 of the large space. Accordingly, purged air discharge units 140 are provided in various places on the floor 105 of the indoor 101 of the large space.

The purified air guide unit 135 is disposed to surround the outside of the large space indoor 101 and is connected to a plurality of air purification and sterilization units 120 and a plurality of purified air discharge units 140, and a plurality of air purification and use. It serves to guide the purified and sterilized air through the sterilization unit 120 to the purified air discharge unit 140. The structure and position of the purified air guide unit 135 may be different from that shown. Therefore, the scope of the present invention is not limited to the shape of the drawing.

A strainer 118 is provided in the central air inlet unit 111, the side air inlet unit 112, the dummy air inlet unit 113, and the purified air outlet unit 140.

The strainer 118 is a means for filtering out foreign matter when air passes through the corresponding position. That is, the strainer 118 is disposed to intersect with the air passage path portion 118a through which air passes, and the air passage passage portion 118a, and filters foreign matter in the air passing through the air passage passage portion 118a. ) Can be included. It is preferable that the front of the strainer 118 can be opened and closed to clean the foreign matter filtering net 118b.

In addition to the strainer 118, the central air inlet unit 111, the side air inlet unit 112, the dummy air inlet unit 113, and the purified air outlet unit 140 are further equipped with an opening-adjustable grille 150 in addition to the strainer 118. . The application of the opening-adjustable grill 150 is optional, but when the opening-adjustable grill 150 is provided, the effect of use is high in that the flow of air can be controlled.

The opening degree adjustable grill 150 is formed on the front of the grill main body 151 and the grill main body 151 with an empty inside, and can be operated within the grill net 152 and the grill net 152 to limit the inflow of foreign matter. It may include an opening adjustment plate 153 provided and a knob 154 coupled to the grill main body 151 and manipulating the opening adjustment plate 153.

Due to the application of the grill net 152, foreign substances or insects may be partially prevented from flowing into the grill main body 151. In addition, the knob 154 is connected to the opening degree adjustment plate 153 and serves to rotate the opening degree adjustment plate 153. For example, when the knob 154 is rotated in a clockwise or counterclockwise direction, the opening degree adjustment plate 153 is interlocked therewith, and the overall opening degree of the grill mesh 152 may be narrowed as shown in FIG. 6 or the total opening degree may increase as shown in FIG. 7. have. Of course, you can close it completely or open it completely.

Meanwhile, in the system for purifying indoor air and sterilizing harmful viruses in a large space according to the present embodiment, a signal input unit 180, a pollution level measurement sensor 185, and a system controller 190 are mounted in the system for control of the system.

The signal input unit 180 serves to input signals for individual operations of the plurality of air purification and sterilization units 120. The signal input unit 180 may have a built-in timer function. Accordingly, indoor air purification and harmful virus sterilization modes can be set and reserved for a time desired by the user.

The pollution level measurement sensor 185 is provided for each location of the indoor 101 of the large space, and serves to measure the pollution level of the corresponding area. Therefore, the contamination level measurement sensor 185 is provided in plural.

The system controller 190 controls the operation of a corresponding one of the plurality of air purification and sterilization units 120 based on an input value of the signal input unit 180. In particular, it controls the operation of the air intake fan device 124 and the circulator device 131 provided in the sterilization unit 120 for both air purification.

In addition, when the automatic control by the signal input unit 180 is selected, the system controller 190 individually performs the operation of the air purification and sterilization units 120 at the corresponding location based on the sensing signals of the pollution level measurement sensors 185. Control. That is, when the operation of the air purification combined sterilization unit 120 corresponding to the location of the area with a lot of contamination is stopped, it is controlled to be on, and when it is already in operation, the air flow is controlled to become stronger.

The system controller 190 performing this role may include a central processing unit 181 (CPU), a memory 182 (MEMORY), and a support circuit 183 (SUPPORT CIRCUIT).

The central processing unit 181 is a variety of computer processors that can be industrially applied to control the operation of the corresponding one of the plurality of air purification and sterilization units 120 based on the input value of the signal input unit 180 in this embodiment. It can be one of.

The memory 182 (MEMORY) is connected to the central processing unit 181. The memory 182 may be installed locally or remotely as a computer-readable recording medium, and can be easily used such as random access memory (RAM), ROM, floppy disk, hard disk, or any digital storage type. It may be at least one or more memories.

The support circuit 183 (SUPPORT CIRCUIT) is coupled to the central processing unit 181 to support the typical operation of the processor. The support circuit 183 may include a cache, a power supply, a clock circuit, an input/output circuit, a subsystem, and the like.

In the present embodiment, the system controller 190 controls the operation of the corresponding one of the plurality of air purification and sterilization units 120 based on the input value of the signal input unit 180, such as a series of control processes, such as the memory 182 ) Can be stored. Typically software routines may be stored in memory 182. Software routines can also be stored or executed by other central processing units (not shown).

Although the process according to the present invention has been described as being executed by a software routine, it is also possible that at least some of the processes of the present invention are performed by hardware. As such, the processes of the present invention may be implemented by software executed on a computer system, or by hardware such as an integrated circuit, or by a combination of software and hardware.

With this configuration, when the operation of the air intake fan device 124 and the circulator device 131 is turned on by the system controller 190, the air in the large space interior 101 is transferred to the air inlet units 111 to 118. Circulation through which the purified air is discharged to the indoor 101 of the large space through the purified air guide unit 135 and the purified air discharge unit 140 after being delivered to the air purification combined sterilization unit 120 to be purified and sterilized. You can implement the process.

According to this embodiment, which acts on the basis of the structure as described above, it is suitable for application to the interior 101 of a large space of a building, and can easily and effectively sterilize harmful viruses as well as purify the air in the interior 101 of the large space. You will be able to.

9 is a structural diagram of a system for purifying indoor air in a large space and sterilizing harmful viruses according to another embodiment of the present invention.

Referring to this drawing, a large space indoor air purification and harmful virus sterilization system according to the present embodiment also includes a plurality of air inlet units 111 to 113, an air purification combined sterilization unit 120, and a purified air discharge unit 140. , May include a purified air guide unit 135.

On the other hand, in the case of the present embodiment, the purified air distribution plate 235 is disposed at a position spaced from the bottom portion 105 to the top. While supporting the purified air distribution plate 235, a plurality of spaced supporters 238 support the purified air distribution plate 235 apart from each other so that the purified air distribution plate 235 is spaced apart from the bottom portion 105.

A plurality of ventilation holes 236 are formed in the purified air distribution plate 235. In this way, the purified air distribution plate 235 is spaced apart from the bottom part 105 and forms a space, and a plurality of ventilation holes 236 are formed in the purified air distribution plate 235, thereby discharging through the purified air discharge unit 140 After the purified air is spread evenly into the space between the bottom portion 105 and the purified air distribution plate 235, it may be discharged into the room 101 through the ventilation holes 236. Therefore, there is an advantage in that the purified air can evenly spread to the entire area of the room 101.

Between the bottom portion 105 and the purified air distribution plate 235 is provided with a replacement-type deodorant combined fragrance generator 237. Since the purified air is discharged through the purged air discharging unit 140 through the interchangeable deodorant combined scent generator 237, the odor of the purified air can be removed, and a subtle good scent can be delivered to the interior 101 of a large space. .

Even if this embodiment is applied, it is suitable to be applied to the interior 101 of a large space of a building, and it is possible to easily and effectively sterilize harmful viruses as well as purify the air of the interior 101 of the large space.

As described above, the present invention is not limited to the described embodiments, and it is obvious to those of ordinary skill in the art that various modifications and variations can be made without departing from the spirit and scope of the present invention. Therefore, it should be said that such modifications or variations belong to the claims of the present invention.

100: building 101: large space indoor
104: ceiling part 105: floor part
111: central air inlet unit 112: side air inlet unit
113: dummy air inlet unit 118: strainer
120: air purification combined sterilization unit 121: sterilization unit casing
122: first air guide 123: first air duct
124: air intake fan device 125: second air guide
126: purification module 127: ultraviolet sterilization module
128: third air guide 129: second air duct
131: circulator device 135: purified air guide unit
140: purified air discharge unit 150: opening degree adjustable grill
151: grill body 152: grill mesh
153: opening degree control plate 154: knob
180: signal input unit 185: pollution level measurement sensor
190: system controller 235: purified air distribution plate
236: ventilation hole 237: interchangeable deodorant combined fragrance generator
238: separation support

Claims (4)

delete delete A central air inlet unit provided in a central area of the ceiling of the indoor of the large space of the building, and through which upper air of the indoor central area of the large space is introduced;
A plurality of side air inlet units provided in the side area of the ceiling and through which upper air of the indoor side area of the large space is introduced;
A plurality of dummy air inlet units provided on the ceiling in a region between the central air inlet unit and the side air inlet units and through which upper air in the dummy region between the center and the side of the large space is introduced;
A plurality of air purification combined sterilization units coupled to the central air inlet unit, the side air inlet unit, and the dummy air inlet unit, respectively, and purifying air introduced from a corresponding region and sterilizing harmful viruses;
A plurality of purified air discharge units for discharging the purified and sterilized air through the plurality of air purification combined sterilization units to the floor of the interior of the large space;
It is arranged to surround the outside of the interior of the large space and is connected to the plurality of air purification combined sterilization units and the plurality of purified air discharging units, and the purified and sterilized air is purified through the plurality of air purification combined sterilization units. A plurality of purified air guide units guiding to the air discharge unit;
A plurality of strainers provided in the central air inlet unit, the side air inlet unit, the dummy air inlet unit, and the purified air outlet unit, respectively, for removing foreign substances in the air flowing along the unit;
A signal input unit for inputting signals for individual operations of the plurality of air purification and sterilization units; And
And a system controller for controlling an operation of a corresponding one of the plurality of air purification and sterilization units based on an input value of the signal input unit,
The air purification combined sterilization unit,
Sterilization unit casing;
It is provided at one end of the sterilization unit casing and is connected to a corresponding one of the central air inlet unit, the side air inlet unit, and the dummy air inlet unit, and collects air delivered from the air inlet unit and guides it to the rear end. A first air guide;
A first air duct connected to the first air guide;
An air intake fan device rotatably provided in the first air duct, acting to suck air into the first air duct, and controlling an operation and speed by the system controller;
A second air guide communicating with a rear end of the first air duct, collecting air in the first air duct and guiding it to a rear end, but having a width narrower than that of the first air guide;
A purification module connected to the second air guide and purifying air delivered from the second air guide;
An ultraviolet sterilization module connected to the purification module and sterilizing harmful viruses in the air for which purification is completed;
A third air guide that is communicated to the rear end of the ultraviolet sterilization module and collects and guides the purified air that has been purified and sterilized to the rear end, but is manufactured with the same width as the second air guide;
A second air duct having both sides connected to the third air guide and the purified air guide unit; And
And a circulator device provided in the second air duct and forcibly blowing air in the second air duct toward the purified air guide unit, and controlling an operation and speed by the system controller. Air purification and harmful virus sterilization system.
A central air inlet unit provided in a central area of the ceiling of the indoor of the large space of the building, and through which upper air of the indoor central area of the large space is introduced;
A plurality of side air inlet units provided in the side area of the ceiling and through which upper air of the indoor side area of the large space is introduced;
A plurality of dummy air inlet units provided on the ceiling in a region between the central air inlet unit and the side air inlet units and through which upper air in the dummy region between the center and the side of the large space is introduced;
A plurality of air purification combined sterilization units coupled to the central air inlet unit, the side air inlet unit, and the dummy air inlet unit, respectively, and purifying air introduced from a corresponding region and sterilizing harmful viruses;
A plurality of purified air discharge units for discharging the purified and sterilized air through the plurality of air purification combined sterilization units to the floor of the interior of the large space;
It is arranged to surround the outside of the interior of the large space and is connected to the plurality of air purification combined sterilization units and the plurality of purified air discharging units, and the purified and sterilized air is purified through the plurality of air purification combined sterilization units. A plurality of purified air guide units guiding to the air discharge unit;
A plurality of strainers provided in the central air inlet unit, the side air inlet unit, the dummy air inlet unit, and the purified air outlet unit, respectively, for removing foreign substances in the air flowing along the unit;
A signal input unit for inputting signals for individual operations of the plurality of air purification and sterilization units; And
And a system controller for controlling an operation of a corresponding one of the plurality of air purification and sterilization units based on an input value of the signal input unit,
Each of the central air inlet unit, the side air inlet unit, the dummy air inlet unit, and the purified air outlet unit further includes an opening degree adjustable grill, which is capable of adjusting the opening degree of air,
The opening degree adjustable grill,
A grill body with an empty inside;
A grill net formed on the front surface of the grill main body to limit the inflow of foreign matter;
An opening degree control plate operably provided in the grill mesh; And
It is coupled to the grill body, and includes a knob for operating the opening degree control plate,
The strainer,
An air passage path through which air passes; And
It is disposed to cross the air passage portion and includes a foreign matter filtering net for filtering foreign matter in the air passing through the air passage portion,
The central air inlet unit, the side air inlet unit, and the dummy air inlet unit are all of a large space indoor air purification and harmful virus sterilization system, characterized in that they have a branch pipe structure consisting of a plurality of pipes.

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