Outdoor Air Purification System

Abstract

To provide an air cleaning system capable of efficiently forming a purification section in an outdoor space.SOLUTION: An outdoor air cleaning system includes: a partition surrounding a purification space to define the purification space relative to an external space and having at least one opening connecting the purification space to the external space; an air purifying device to supply purified air to the purification space; and a controller to control the air purifying device. An openness level, which is the area ratio of the opening to the surface area of the partition, is from 10% to 50% inclusive.SELECTED DRAWING: Figure 1

Description

Technical Field

[0001] The present invention relates to an air purification system provided outdoors, and more particularly to an air purification system capable of efficiently forming a purification area in an outdoor space.

Background Art

[0002] As air pollution caused by fine dust (particulate matter: PM), harmful gases, etc. becomes more serious, attempts have been made to purify the air in specific outdoor areas for safe outdoor activities. As part of such outdoor air purification attempts, there are methods such as enlarging existing indoor air purification devices and installing them outdoors, a method of washing out pollutants by artificial rainfall, and an air flow method through the destruction of the atmospheric inversion layer.

[0003] However, according to the above methods, in an open outdoor space, due to air flow and the like, large air purification equipment is required to secure a wide purification area, and it is not easy to ensure the efficiency of removing pollutants such as fine dust.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] The present invention has been made in view of the problems in the above-mentioned conventional air purification system provided outdoors, and an object of the present invention is to provide an air purification system capable of efficiently forming a purification area in an outdoor space.

Means for Solving the Problems

[0006] The outdoor air purification system according to the present invention made to achieve the above object includes a partition wall that surrounds a purification space, defines the purification space with respect to the external space, and has one or more openings that communicate the purification space and the external space, an air purification device that supplies purified air to the purification space, and a control unit that controls the air purification device, and further includes an air sensor that measures the quality of air. The air sensor is provided in the external space and the purification space, measures the air quality inside the purification space and the air quality of the external space around the purification space. The air sensor includes a fine dust sensor that measures the concentration of fine dust in the air, and the air sensor includes a temperature sensor and a humidity sensor that measure the temperature and humidity of the air. The opening degree, which is the area ratio of the opening to the surface area of the partition wall, is 10% or more and 50% or less. wherein the partition wall includes a side wall that forms a lateral boundary between the purification space and the external space, and an upper wall that forms a vertical boundary between the purification space and the external space; the opening is provided in at least one of the side wall and the upper wall; the air purifying device further has a blocking device that blocks unpurified air from flowing into the purification space through the opening; the opening includes a first opening provided in the side wall; the blocking device is provided at a lateral edge of the first opening and includes a lateral blocking device that jets the purified air supplied from the air purifying device across the first opening in the lateral direction; and the lateral blocking device jets the purified air obliquely toward the purification space side with respect to the lateral direction It is characterized by this.

[0007] Preferably, the opening degree is 20% or more. The volume of the purification space is preferably 100,000 m 3 or less. Preferably, at least a part of the partition wall is transparent. Preferably, the partition wall includes a movable wall that opens and closes at least a part of the opening. Preferably, it further has a temperature adjustment device that forms a temperature gradient between the purification space and the external space. Yes

[0008] It further has a downward flow device that is supplied with the air purified by the air purification device and forms a downward air flow from the upper part to the lower part of the purification space. The blocking device is preferably supplied with the air purified by the air purification device and includes a lateral flow device that forms a lateral air flow along the side wall inside the purification space. Before Preferably, the blocking device is provided at a vertical edge of the first opening and includes a vertical blocking device that ejects the purified air supplied from the air purification device across the first opening in the vertical direction. Preferably, the vertical blocking device ejects the purified air obliquely toward the purified space side with respect to the vertical direction. Preferably, the vertical blocking device includes a downward blocking device provided at an upper edge of the first opening for ejecting the purified air downward. Preferably, the vertical blocking device includes an upward blocking device provided at a lower edge of the first opening for ejecting the purified air upward. Yes Before Preferably, the opening includes a second opening provided in the upper wall, and the blocking device includes a streamlined dome structure provided around the second opening.

[0009] In addition, an outdoor air purification system according to the present invention made to achieve the above object includes a partition wall surrounding a purification space, defining the purification space with respect to an external space, and having one or more openings communicating the purification space and the external space, and an air purification device for supplying purified air to the purification space, and further includes an air sensor for measuring the quality of air, the air sensor being provided in the external space and the purification space for measuring the air quality inside the purification space and the air quality of the external space around the purification space, the air sensor including a fine dust sensor for measuring the concentration of fine dust in the air, the air sensor including a temperature sensor and a humidity sensor for measuring the temperature and humidity of the air, and an opening degree which is an area ratio of the opening to the surface area of the partition wall being 20% or more. wherein the partition wall includes a side wall that forms a lateral boundary between the purification space and the external space, and an upper wall that forms a vertical boundary between the purification space and the external space; the opening is provided in at least one of the side wall and the upper wall; the air purifying device further has a blocking device that blocks unpurified air from flowing into the purification space through the opening; the opening includes a first opening provided in the side wall; the blocking device is provided at a lateral edge of the first opening and includes a lateral blocking device that jets the purified air supplied from the air purifying device across the first opening in the lateral direction; and the lateral blocking device jets the purified air obliquely toward the purification space side with respect to the lateral direction It is characterized by this.

[0010] Preferably, at least a part of the partition wall is transparent. Preferably, it further has a moving wall for opening and closing at least a part of the opening. Preferably, an opening degree which is an area ratio of the opening to the surface area of the partition wall is 50% or less.

Advantages of the Invention

[0011] According to the air purification system of the present invention, it is possible to efficiently purify outdoor air by maintaining a sense of openness and forming a purification space that is isolated from the external space to a certain extent.

Brief Description of the Drawings

[0012]

Figure 1

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Embodiments for Carrying Out the Invention

[0013] Next, specific examples of embodiments for implementing the air purification system according to the present invention will be described with reference to the drawings. In the following drawings, the same reference numerals denote the same components, and in the drawings, the size of each component may be exaggerated for clarity and convenience of explanation.

[0014] FIG. 1 is a diagram showing a schematic configuration of an air purification system according to an embodiment of the present invention. Referring to FIG. 1, an air purification system according to an embodiment of the present invention includes a partition wall 3 that defines a purification space 2, and an air purification device 4 that supplies purified air to the purification space 2. The partition wall 3 surrounds the purification space 2 and defines the purification space 2 with respect to the external space 1. The partition wall 3 partially separates the purification space 2 from the external space 1. The partition wall 3 includes one or more openings 31 that communicate the purification space 2 and the external space 1. The purification space 2 can be, for example, a bus stop, a playground, a park rest area, a bus terminal, a school playground, an outdoor sports stadium, a building courtyard, etc.

[0015] The partition wall 3 is an artificial structure for separating the purification space 2 from the external space 1. For example, the partition wall 3 surrounds a bus stop, a playground, a bus terminal, a park rest area, and partially isolates the bus stop, the playground, the bus terminal, the park rest area from the external space 1. In addition, the partition wall 3 is also embodied by the structure itself that requires the purification space 2. For example, in the case of a sports stadium, the partition wall 3 is also embodied by a structure including a wall surrounding the central sports ground and a spectator stand. In the case of a building courtyard, the partition wall 3 is also embodied by the building structure surrounding the courtyard.

[0016] The purification space 2 is connected to the external space 1 through the opening 31. That is, the openness of the purification space 2 is maintained by the opening 31. The opening 31 may have a size that can guarantee the autonomous usability of the purification space 2. For example, in the case of a bus stop, the opening 31 may have a position, shape, and size such that it can function as a passage for passengers waiting for a bus to move from the external space 1 to the purification space 2 and vice versa. In the case of a playground, a park rest area, an outdoor sports stadium, etc., the opening 31 may have a position, shape, and size such that it functions as an access passage for users, and additional openings 31 are also formed in the partition wall 3 so that the playground, park rest area, outdoor sports stadium, etc. are open to the sky. In the case of the atrium of a building, the opening 31 is also formed in the partition wall 3 so that the atrium is open to the sky. One or more openings 31 may be formed in the partition wall 3 so as to maintain the functionality and openness suitable for the purpose of use of the facility to which the air purification system is applied.

[0017] The air purification device 4 can purify air by various purification methods such as a filter method, an electrostatic method, a plasma method, a catalyst method, and an adsorption method. The purified air is supplied to the purification space 2. The air purification device 4 is provided outside the partition wall 3, purifies the air in the external space 1, and supplies it to the purification space 2. Alternatively, the air purification device 4 is provided in the purification space 2 and purifies the air inside the purification space 2. Alternatively, the air purification device 4 is also provided in each of the external space 1 and the purification space 2. The air purification device 4 is manufactured, for example, based on PM2.5 to supply purified air in which the concentration of fine dust (particulate matter: PM) is reduced by about 50% or more compared to the outside air.

[0018] The air purification system may include an air sensor 5 that measures the quality of the air. The air sensor 5 is provided in the external space 1 or the purification space 2, or both. The air sensor 5 measures the air quality inside the purification space 2. The air sensor 5 can also measure the air quality in the external space 1 around the purification space 2. The air sensor 5 may include a fine dust sensor 53 that measures the concentration of fine dust in the air. The air sensor 5 may further include a temperature sensor 51 and a humidity sensor 52 that measure the temperature and humidity of the air. Although not shown in the figure, the air sensor 5 may further include a wind speed sensor that measures the air flow rate in the external space 1, a gas detection sensor that detects gas components in the air in the purification space 2, and the like.

[0019] Sensors of various types known as the fine dust sensor 53 may be employed. For example, the fine dust sensor 53 may include a flow meter unit that induces an air flow and measures the flow rate, and a sensing unit that detects fine dust in the air. The sensing unit measures the amount of fine dust in the air by various detection methods, for example, by light scattering, gravimetric, or inertial mass methods. The light scattering method irradiates light on a measurement region through which air passes, receives the light scattered by the fine dust, and measures the amount of fine dust. The gravimetric method passes air through a filter in the sensor to collect fine dust and measures the amount of the collected fine dust. The inertial mass method sinks the fine dust to a specific position and indirectly measures its weight.

[0020] The control unit 9 controls the air purification device 4 based on the detection values of the air sensor 5. The control unit 9 turns the air purification device 4 on / off or controls the operating speed of the air purification device 4 based on the detection values of the air sensor 5.

[0021] In a conventional outdoor air purification system, the air purification device 4 is provided in the external space 1. The purified air is supplied to the periphery of the air purification device 4. Since the purification space 2 to which the purified air is supplied is not separated from the external space 1, the air flow generated in the external space 1 directly passes through the purification space 2. Therefore, even if the purified air is supplied to the purification space 2, it is difficult to maintain the purified air in the purification space 2, and it is mixed with the unpurified air flowing in from the external space 1, making it difficult to maintain the air cleanliness of the purification space 2. In addition, the required capacity of the air purification device 4 per unit volume of the purification space 2 that can be secured is extremely large, making it difficult to ensure economic effectiveness.

[0022] According to an embodiment of the present invention, the purification space 2 is partially isolated from the external space 1 by a partition wall 3. The air inside the purification space 2 and the air in the external space 1 are partially isolated by the partition wall 3. The influence of the air flow in the external space 1 on the purification space 2 can be reduced, and the mixing of the purified air supplied to the purification space 2 and the unpurified air in the external space 1 can be reduced. In addition, the purification space 2 is partitioned by the partition wall 3 into a space where the purified air can stay and circulate. Since the purification space 2 is partially isolated from the external space 1, compared with the conventional outdoor air purification system, an air purification device 4 with a small purification capacity can be used to maintain the air cleanliness of the purification space 2 at an appropriate level. This means an improvement in air purification efficiency in terms of the cost comparison of the air purification system, and guarantees the feasibility of the outdoor air purification system.

[0023] The size of the opening 31 is determined in consideration of the openness of the purification space 2 and the functionality of the opening 31. The size of the opening 31 is defined by the openness, which is the area ratio of the opening 31 to the surface area of the partition wall 3, as shown in Equation 1 below. (Equation 1) Openness = {(Area of the opening) / (Surface area of the partition wall)} × 100 (%) ··· Equation 1

[0024] As a minimum condition for ensuring the openness of the purification space 2 and the functionality of the opening 31, the openness can be about 10% or more. If the opening degree is lower than 10%, the purification space 2 is not distinguishable from the interior space of the building and is difficult to be regarded as a substantial outdoor air purification system. In order to define a practical purification space 2 provided outdoors that can ensure openness and functionality, such as a bus stop, a playground, a bus terminal, or a rest space in a park, the opening degree of the partition wall 3 is about 20% or more.

[0025] An excessively high opening degree is disadvantageous for maintaining the air cleanliness of the purification space 2. The upper limit of the opening degree is determined considering the openness of the purification space 2, the functionality of the opening 31, the economy and efficiency of the installation cost of the air purification device 4 that can maintain the air cleanliness of the purification space 2 to a desired level. Considering such points, the opening degree is about 50% or less, whereby the fine dust reduction efficiency of the purification space 2 of 50% or more can be realized. Also, the clean air maintenance efficiency of the purification space 2 can be maintained at 50% or more.

[0026] The partition wall 3 may include a side wall 32 that forms a lateral boundary of the purification space 2 and an upper wall 33 that forms a longitudinal boundary of the purification space 2. The opening 31 may be provided with one or more in at least one of the side wall 32 and the upper wall 33. In the embodiment shown in FIG. 1, one opening 31 is provided in the side wall 32. The area of the opening 31 is 10% or more of the surface area of the side wall 32 and the upper wall 33 including the opening 31. Considering openness and functionality, the area of the opening 31 may be 20% or more of the surface area of the side wall 32 and the upper wall 33 including the opening 31. Considering the economy and efficiency of the air purification system, the area of the opening 31 may be 50% or less of the surface area of the side wall 32 and the upper wall 33 including the opening 31.

[0027] In order to realize high openness even at a low opening degree, at least a part of the partition wall 3 may be transparent. For example, at least a part of the side wall 32 is transparent, and the upper wall 33 may also be partially or entirely transparent. Although not shown in the figure, a solar cell for solar power generation may be provided on the upper wall 33. In that case, the air purification system may include an energy storage system (ESS) for storing the electricity generated by the solar cell. The electricity stored in the energy storage system can be used as energy to drive the air purification device 4, the air sensor 5, the temperature control device 6, the control unit 9, and the like. Thereby, an environmentally friendly air purification system can be realized.

[0028] If the volume of the purification space 2 is excessive (large), the installation cost of the air purification device 4 for maintaining the air cleanliness of the purification space 2 will increase excessively, and the economic efficiency will be low. Considering such points, the volume of the purification space 2 is about 100,000 mm 3 or less. When the air cleanliness inside the purification space 2 is very low, it is necessary to quickly increase the air cleanliness of the purification space 2. For example, in the case of a bus stop, a playground, a rest space in a park, a school playground, a bus terminal, an atrium of a building, etc., at night, since there are no users, the control unit 9 does not operate the air purification device 4. In the case of a sports stadium, during the non-use period, the control unit 9 does not operate the air purification device 4. In that case, the air cleanliness of the purification space 2 will decrease. When it becomes daytime and the bus stop, the playground, the rest space in the park, the school playground, the bus terminal, the atrium of the building, etc. are used again, or during the use time of the sports stadium, it is necessary to quickly increase the air cleanliness of the purification space 2.

[0029] Therefore, the air purification system may include a moving wall 34 that opens and closes at least a part of the opening 31. When it is necessary to rapidly increase the air cleanliness of the purification space 2, the control unit 9 drives the movable wall 34 to entirely or partially block the opening 31, isolates the purification space 2 from the external space 1, drives the air purification device 4, and supplies the purified air to the purification space 2. Thereby, the air cleanliness of the purification space 2 can be rapidly increased. When the air cleanliness of the purification space 2 reaches the target cleanliness, the control unit 9 drives the movable wall 34 to open the opening 31.

[0030] The movable wall 34 of the present embodiment is provided at the end of the side wall 32 so as to rotate, and moves (rotates) between a position where the opening 31 is opened and a position where the opening 31 is blocked. The form of the movable wall 34 can be diverse. For example, the movable wall 34 can be provided on the side wall 32 or the upper wall 33 and can also be embodied in a bellows shape that contracts / expands in the vertical direction. Although not shown in the figure, when the opening 31 is provided in the upper wall 33, the movable wall 34 is provided on the upper wall 33. The movable wall 34 can also open and close the opening 31 in order to protect the purification space 2 in response to external weather changes.

[0031] FIG. 2 is a perspective view showing another embodiment of the partition wall 3 of the present invention. Referring to FIG. 2, the partition wall 3 is generally cylindrical and defines the purification space 2 with respect to the external space 1. A plurality of first openings (31-1) are provided in the side wall 32 that forms the lateral boundary of the purification space 2. The plurality of first openings (31-1) can function as entrances and exits to the purification space 2. The upper wall 33 that forms the vertical boundary of the purification space 2 can function as a roof.

[0032] Second openings (31-2, 31-3) are provided in the upper wall 33. The movable walls (34-1, 34-2) open and close the second openings (31-2, 31-3), respectively. Although not shown in the figure, a movable wall for opening and closing the first opening (31-1) may be provided. At least a part of the side wall 32 may be transparent. At least a part of the upper wall 33 may be transparent. For example, the movable walls (34-1, 34-2) are transparent.

[0033] The sum of the areas of the first opening (31-1) and the second openings (31-2, 31-3) may be 10% or more of the surface areas of the side wall 32 and the upper wall 33. Considering openness and functionality, the sum of the areas of the first opening (31-1) and the second openings (31-2, 31-3) may be 20% or more of the surface areas of the side wall 32 and the upper wall 33. Considering the economy and efficiency of the air purification system, the sum of the areas of the first opening (31-1) and the second openings (31-2, 31-3) may be 50% or less of the surface areas of the side wall 32 and the upper wall 33. The purification space 2 is also, for example, a playground, a school playground, a rest space in a park, etc. The partition wall 3 is not limited to the examples shown in FIGS. 1 and 2, and can be embodied in various forms including functional and aesthetic structures.

[0034] Referring to FIG. 1 again, the air purification system of the present invention can further include a temperature control device 6. The temperature control device 6 adjusts the internal temperature of the purification space 2. The temperature control device 6 may include, for example, a freezer and a heater. The temperature control device 6 receives the air purified by the air purification device 4, cools or heats it to a desired temperature, and supplies it to the purification space 2. The temperature control device 6 can be provided inside the purification space 2 and can also cool or heat the purified air to a desired temperature.

[0035] The air cleanliness inside the purification space 2 is maintained at an appropriate level by the purified air supplied from the air purification device 4. According to the air purification system of the present embodiment, the purification space 2 is connected to the external space 1 through the opening 31. Therefore, there is a possibility that unpurified outside air may flow into the purification space 2 through the opening 31. Therefore, a blocking device is required to block the unpurified outside air from flowing into the purification space 2 through the opening 31.

[0036] As an example, the temperature control device 6 can form a temperature gradient between the purification space 2 and the outside space 1 so that air does not flow from the outside space 1 into the purification space 2 through the opening 31. That is, the temperature control device 6 forms a temperature gradient between the purified air inside the purification space 2 and the outside air in the outside space 1. At the opening 31, the purified air and the outside air meet each other. Due to the temperature difference between the purified air and the outside air, the outside air can be partially blocked from flowing into the purification space 2 through the opening 31. Thereby, the temperature control device 6 can function as a blocking device. Also, as an example, by utilizing the air flow inside the purification space 2, it is possible to prevent unpurified air from flowing into the purification space 2 or to reduce the inflow.

[0037] FIG. 3 is a diagram showing a schematic configuration of a blocking device according to an embodiment of the present invention. In this embodiment, the air supply structure itself that supplies air to the purification space 2 functions as a blocking device. Referring to FIG. 3, the air cleaning system may include a vertical flow device 110 that is supplied with purified air from the air purification device 4 and forms a downward air flow 113 from the upper part of the purification space 2. The blocking device may include a lateral flow device 120 that is supplied with purified air from the air purification device 4 and forms a lateral air flow 123 along the side wall 32 inside the purification space 2.

[0038] The vertical flow device 110 is connected to the air purification device 4 and provided on the upper wall 33. The vertical flow device 110 may include an air discharge port 112 that is open downward. The air discharge port 112 is in a form that extends horizontally. Although not shown in the figure, the air discharge port 112 may also be implemented by a plurality of air discharge ports arranged horizontally. Although not shown in the figure, the vertical flow device 110 may also include a blower that discharges the purified air received from the air purification device 4 to the air discharge port 112. The blower may be controlled by the control unit 9.

[0039] The horizontal flow device 120 is connected to the air purification device 4 and is provided on the side wall 32. The horizontal flow device 120 may include an air discharge port 122 that is open horizontally. The air discharge port 122 is in a form that extends vertically. Although not shown in the figure, the air discharge port 122 may also be implemented by a plurality of air discharge ports arranged vertically. Although not shown in the figure, the horizontal flow device 120 may also include a blower that discharges the purified air received from the air purification device 4 to the air discharge port 122. The blower may be controlled by the control unit 9.

[0040] According to such a configuration, while the downward air flow 113 and the horizontal air flow 123 are combined with each other, overall, an air flow that circulates horizontally along the side wall 32 is formed inside the purification space 2. The horizontally circulating air flow forms a blocking wall that blocks the unpurified external air flowing in through the opening 31. Therefore, the opening 31 provided on the side wall 32, or as shown in FIG. 2, the openings (31-1, 34-1, 34-2) provided on the side wall 32 and the upper wall 33 can block the external air flowing into the purification space 2 or reduce the amount of external air flowing in.

[0041] The horizontal flow device 120 ejects the purified air obliquely toward the purification space 2 in the horizontal direction. For example, the air outlet 122 is formed to incline toward the purification space 2 in the horizontal direction. According to such a configuration, since the purified air ejected through the air outlet 122 heads toward the purification space 2, the leakage amount of the purified air to the external space 1 can be reduced.

[0042] FIG. 4 is a perspective view showing a schematic configuration of a blocking device according to an embodiment of the present invention. In FIG. 4, the air supply structure for supplying the purified air from the air purifier 4 to the purification space 2 is omitted, and only the structure of the blocking device is shown. Referring to FIG. 4, a first opening 31a is provided in the side wall 32. The blocking device may include a vertical blocking device provided at a vertical edge of the first opening 31a and ejecting the purified air across the first opening 31a in the vertical direction. The vertical blocking device is connected to the air purifier 4 and ejects the purified air supplied from the air purifier 4. The vertical blocking device can also inhale and eject the air inside the purification space 2.

[0043] The vertical edge of the first opening 31a includes an upper edge (31a-1). The vertical blocking device includes a downward blocking device 130 provided at the upper edge (31a-1) of the first opening 31 and ejecting the purified air downward. The downward blocking device 130 includes an air outlet 131 opened downward. The air outlet 131 may be in a form extending horizontally along the upper edge (31a-1). Although not shown in the figure, the air outlet 131 may also be implemented by a plurality of horizontally arranged air outlets. Although not shown in the figure, the downward blocking device 130 may also include a blower that discharges the purified air received from the air purifier 4 or the air inside the purification space 2 to the air outlet 131.

[0044] The downward blocking device 130 forms a downward air flow 135 that traverses the first opening 31a in the vertical direction. The downward air flow 135 functions as an air curtain that traverses the first opening 31a in the vertical direction. Therefore, the unpurified air is blocked by the downward air flow 135 and will not flow into the purification space 2 through the first opening 31a or the inflow volume will decrease.

[0045] The vertical edges of the first opening 31a include the lower edge (31a-2). The vertical blocking device is provided at the lower edge (31a-2) of the first opening 31 and includes an upward blocking device 140 that upwardly ejects the purified air. The lower edge (31a-2) of the first opening 31 is substantially also the bottom where the partition 3 is provided. The upward blocking device 140 is connected to the air purification device 4 and includes an air discharge port 141 that is open upward. The air discharge port 141 is also in a form that extends horizontally along the lower edge (31a-2). Although not shown in the figure, the air discharge port 141 can also be implemented by a plurality of horizontally arranged air discharge ports. Although not shown in the figure, the upward blocking device 140 can also include a blower that discharges the purified air received from the air purification device 4 or the air inside the purification space 2 to the air discharge port 141.

[0046] The upward blocking device 140 forms an upward air flow 145 that traverses the first opening 31a in the vertical direction. The upward air flow 145 functions as an air curtain that traverses the first opening 31a in the vertical direction. Therefore, the unpurified air is blocked by the upward air flow 145 and will not flow into the purification space 2 through the first opening 31a or the inflow volume will decrease. In addition, since the upward blocking device 140 blocks the external air flowing near the bottom, it can effectively block the dust at the bottom from flowing into the purification space 2.

[0047] Figure 5 is a schematic partial longitudinal sectional view of the shut-off device shown in Figure 4. Referring to Figure 5, the longitudinal flow device ejects the purified air obliquely to both sides of the purification space 2 in the longitudinal direction. For example, the downward air outlet 131 and the upward air outlet 141 are formed so as to incline toward the purification space 2 in the longitudinal direction. According to such a configuration, since the purified air ejected through the downward air outlet 131 and the upward air outlet 141 will go toward the purification space 2, the leakage amount of the purified air to the external space 1 can be reduced.

[0048] Figure 6 is a perspective view showing the schematic configuration of the shut-off device according to an embodiment of the present invention. In Figure 6, the air supply structure for supplying the purified air from the air purification device 4 to the purification space 2 is omitted, and only the structure of the shut-off device is shown in the figure. Referring to Figure 6, a first opening 31a is provided in the side wall 32. The shut-off device includes a lateral shut-off device 150 provided at at least one of the lateral edges (31a-3, 31a-4) of the first opening 31a, and ejects the purified air across the first opening 31a in the lateral direction. The lateral shut-off device 150 is connected to the air purification device 4 and ejects the purified air supplied from the air purification device 4. The lateral shut-off device 150 can also inhale and eject the air inside the purification space 2.

[0049] In the present embodiment, lateral shut-off devices 150 are provided at the lateral edges (31a-3, 31a-4) of the first opening 31a respectively, and eject air in opposite directions to each other in the lateral direction. The lateral shut-off device 150 is connected to the air purification device 4 and includes an air outlet 151 opened in the lateral direction. The air outlet 151 may be in a form extending longitudinally along the edges (31a-3, 31a-4). Although not shown in the figure, the air outlet 151 may also be embodied by a plurality of air outlets arranged in the vertical direction. Although not shown in the figure, the lateral blocking device 150 may also include a blower that discharges the purified air received from the air purification device 4 or the air in the purification space 2 to the air outlet 151.

[0050] The lateral blocking device 150 forms an air flow 155 that traverses the first opening 31a in the lateral direction. The air flow 155 functions as an air curtain that traverses the first opening 31a in the lateral direction. Therefore, the unpurified air is blocked by the air flow 155 and does not flow into the purification space 2 through the first opening 31a, or the inflow amount is reduced. The blocking device shown in FIG. 4 can be applied to the blocking device shown in FIG. 6.

[0051] FIG. 7 is a cross-sectional view of the blocking device shown in FIG. 6. Referring to FIG. 7, the lateral blocking device 150 ejects the purified air obliquely toward the purification space 2 in the lateral direction. For example, the air outlet 151 is also formed so as to incline toward the purification space 2 in the lateral direction. According to such a configuration, since the purified air ejected through the air outlet 151 is directed toward the purification space 2, the leakage amount of the purified air to the external space 1 can be reduced.

[0052] FIG. 8 is a perspective view showing a schematic configuration of a blocking device according to another embodiment of the present invention. In FIG. 8, the main supply device that supplies the purified air from the air purification device 4 to the purification space 2 is omitted, and only the structure of the blocking device is shown in the figure. Referring to FIG. 8, the partition wall 3 includes a side wall 32 that forms a lateral boundary of the purification space 2 and an upper wall 33 that forms a vertical boundary of the purification space 2. A plurality of first openings (31-1) are provided in the side wall 32. A second opening (31-2) is provided in the upper wall 33. The shut-off device of this embodiment utilizes the air flow flowing along the upper wall 33 from the external space 1, and through the second opening (31-2), prevents the external air from flowing into the purification space 2.

[0053] For example, referring to FIG. 8, the shut-off device is implemented by a streamlined dome structure 160 provided around the second opening (31-2). The streamlined dome structure 160 has a shape that guides the external air flowing along its outer surface to flow outside across the second opening (31-2). With such a configuration, it is possible to prevent the external air from flowing into the purification space 2 through the second opening (31-2), or to reduce the inflow amount. Also, when the external air flows across the second opening (31-2) along the streamlined dome structure 160, a negative pressure is generated around the second opening (31-2). Therefore, in the vicinity of the second opening (31-2), an air flow is formed from the purification space 2 toward the external space 1, making it difficult for the external air to flow into the purification space 2 through the second opening (31-2). The above-described embodiments of the air purification system can be applied in various ways.

[0054] FIG. 9 is a perspective view showing a schematic configuration of an example of the air purification system of the present invention provided at a bus stop. Referring to FIG. 9, the purification space 2 is defined by the partition wall 3. The purification space 2 is a waiting space for passengers waiting for a bus. The opening 31 functions as an entrance and exit for passengers. The air purification device 4 is provided outside the side wall 32. The air purification device 4 supplies the purified air to the purification space 2. The temperature adjustment device 6 adjusts the temperature inside the purification space 2. At least a part of the side wall 32 and the upper wall 33 can be transparent. A solar cell can be provided on the upper wall 33. The cutoff device shown in FIGS. 3 to 7 can also be applied to the air purification system of the bus stop shown in FIG. 9.

[0055] FIG. 10 is a perspective view showing a schematic configuration of an example of the air purification system of the present invention provided in a bus terminal. Referring to FIG. 10, a purification space 2 is defined by a partition wall 3. The partition wall 3 is embodied by a side wall 32, an upper wall 33, and a side wall 8 of the main building of the bus terminal. The purification space 2 is a bus lifting space. An opening 31 provided in the side wall 32 functions as an entrance and exit for the bus. Passengers enter and exit the purification space 2 through the opening 31. Although not shown in the figure, passengers can enter and exit the purification space 2 through an entrance and exit provided in a side wall 8 of the main building of the bus terminal. At least a part of the side wall 32 and the upper wall 33 can be transparent. A solar cell can be provided on the upper wall 33. The air purification device 4 is provided outside the purification space 2 and supplies purified air to the purification space 2 through a duct (not shown). The temperature control device 6 adjusts the temperature inside the purification space 2. The cutoff device shown in FIGS. 3 to 7 can also be applied to the air purification system of the bus terminal shown in FIG. 10.

[0056] FIG. 11 is a perspective view showing a schematic configuration of an example of the air purification system of the present invention provided in a playground. Referring to FIG. 11, the partition wall 3 structure shown in FIG. 2 is adopted to surround a playground provided with a plurality of play equipment and define a purification space 2. The partition wall 3 of the present embodiment generally includes a cylindrical side wall 32 and an upper wall 33 forming a roof. A plurality of first openings (31-1) are provided in the side wall 32. The plurality of first openings (31-1) function as entrances and exits to the purification space 2. At least a part of the side wall 32 and the upper wall 33 can be transparent. On the upper wall 33, second openings (32-2, 32-3) are provided, which can improve the sense of openness of the playground. The second openings (32-2, 32-3) are opened and closed by moving walls (34-1, 34-2). The control unit 9 can drive the moving walls (34-1, 34-2) as necessary to close the second openings (32-2, 32-3) or open them partially or entirely. The moving walls (34-1, 34-2) can be transparent. Although not shown in the drawings, a moving wall for opening and closing the first opening (31-1) may be provided. The air purification device 4 supplies the purified air to the purification space 2. The temperature adjustment device 6 adjusts the temperature inside the purification space 2. The shut-off device shown in FIGS. 3 to 7 can also be applied to the air purification system of the playground shown in FIG. 11.

[0057] FIG. 12 is a perspective view showing a schematic configuration of an example of the air purification system of the present invention provided in the atrium of a building. Referring to FIG. 12, in this embodiment, the atrium becomes the purification space 2. The partition wall 3 is embodied by a building surrounding the atrium in the lateral direction. The upper part of the atrium is opened by the second opening (31-2). The air purification device 4 supplies the purified air to the purification space 2. The temperature adjustment device 6 adjusts the temperature inside the purification space 2. As a shut-off device for blocking the purified air from flowing out of the purification space 2 through the second opening (31-2), the embodiment shown in FIG. 8 can be applied. The shut-off device can also be embodied by a streamlined dome structure 160 provided around the second opening (31-2).

[0058] Note that the outdoor air purification system according to the present invention is not limited to the above-described embodiments. Various modifications can be made without departing from the technical scope of the present invention.

Explanation of Reference Numerals

[0059] 1 External space 2 Purification space 3 Partition wall 4 Air purification device 5 Air sensor 6 Temperature control device 9 Control unit 31 Opening 31-1, 31a First opening 31-2, 31-3 Second opening 31a-1 Upper edge 31a-2 Lower edge 32 Side wall 33 Upper wall 34, 34-1, 34-2 Moving wall 51 Temperature sensor 52 Humidity sensor 53 Fine dust sensor 110 Vertical flow device 120 Horizontal flow device 112, 122, 131, 141 Air discharge port 130 Downward blocking device 140 Upward blocking device 150 Horizontal blocking device 160 Streamlined structure

Claims

1. A partition wall that surrounds a purification space, defines the purification space with respect to the external space, and has one or more openings that communicate the purification space and the external space; An air purification device that supplies purified air to the purification space; A control unit that controls the air purification device, and further includes: An air sensor that measures the quality of air; The air sensor is provided in the external space and the purification space, and measures the air quality inside the purification space and the air quality of the external space around the purification space; The air sensor includes a fine dust sensor that measures the concentration of fine dust in the air; The air sensor includes a temperature sensor and a humidity sensor that measure the temperature and humidity of the air; The openness, which is the area ratio of the opening to the surface area of the partition wall, is 10% or more and 50% or less; The partition wall includes a side wall that forms a horizontal boundary between the purification space and the external space; An upper wall that forms a vertical boundary between the purification space and the external space; The opening is provided in at least one of the side wall and the upper wall; Further includes a blocking device that blocks unpurified air from flowing into the purification space through the opening; The opening includes a first opening provided in the side wall; The blocking device is provided at a horizontal edge of the first opening, and includes a horizontal blocking device that ejects the purified air supplied from the air purification device across the first opening in the horizontal direction; The horizontal blocking device ejects the purified air obliquely toward the purification space with respect to the horizontal direction. An outdoor air purification system characterized by this.

2. The outdoor air purification system according to claim 1, wherein the openness is 20% or more.

3. The volume of the purification space is 100,000 m ３ The outdoor air purification system according to claim 1, characterized in that it is as follows.

4. The outdoor air purification system according to claim 1, wherein at least a part of the partition wall is transparent.

5. The outdoor air purification system according to claim 1, further comprising a moving wall that opens and closes at least a part of the opening.

6. The outdoor air purification system according to claim 1, further comprising a temperature adjustment device that forms a temperature gradient between the purification space and the external space.

7. Further includes a downward flow device that is supplied with the purified air from the air purification device and forms a downward air flow from the upper part of the purification space. The shut-off device is supplied with the air purified by the air purification device, and includes a lateral flow device that forms a lateral air flow along the side wall inside the purification space. The outdoor air purification system according to claim 1, characterized in that.

8. The shut-off device is provided at a vertical edge of the first opening, and includes a vertical shut-off device that ejects the purified air supplied from the air purification device across the first opening in the vertical direction. The outdoor air purification system according to claim 1, characterized in that.

9. The vertical shut-off device ejects the purified air obliquely toward the purification space side with respect to the vertical direction. The outdoor air purification system according to claim 8, characterized in that.

10. The vertical shut-off device is provided at an upper edge of the first opening, and includes a downward shut-off device that ejects the purified air downward. The outdoor air purification system according to claim 8, characterized in that.

11. The vertical shut-off device is provided at a lower edge of the first opening, and includes an upward shut-off device that ejects the purified air upward. The outdoor air purification system according to claim 8, characterized in that.

12. The opening includes a second opening provided in the upper wall, The shut-off device includes a streamlined dome structure provided around the second opening. The outdoor air purification system according to claim 1, characterized in that.

13. A partition wall that surrounds the purification space, defines the purification space with respect to the external space, and has one or more openings that communicate the purification space and the external space, An air purification device that supplies purified air to the purification space, Further includes an air sensor that measures the quality of air, The air sensor is provided in the external space and the purification space, and measures the air quality inside the purification space and the air quality of the external space around the purification space, The air sensor includes a fine dust sensor that measures the concentration of fine dust in the air, The air sensor includes a temperature sensor and a humidity sensor that measure the temperature and humidity of the air, The opening ratio, which is the area ratio of the opening to the surface area of the partition wall, is 20% or more, The partition wall includes a side wall that forms a lateral boundary between the purification space and the external space, An upper wall that forms a vertical boundary between the purification space and the external space, The opening is provided in at least one of the side wall and the upper wall, Further comprising a blocking device that blocks unpurified air from flowing into the purification space through the opening from the external space. The opening includes a first opening provided in the side wall. The blocking device is provided at a lateral edge of the first opening and includes a lateral blocking device that ejects the purified air supplied from the air purification device across the first opening in the lateral direction. The lateral blocking device ejects the purified air obliquely toward the purification space with respect to the lateral direction. An outdoor air purification system characterized by this.

14. The outdoor air purification system according to claim 13, wherein at least a part of the partition wall is transparent.

15. The outdoor air purification system according to claim 13, further comprising a movable wall that opens and closes at least a part of the opening.

16. The outdoor air purification system according to claim 13, wherein the opening degree, which is the area ratio of the opening to the surface area of the partition wall, is 50% or less.

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