WO2016170587A1

WO2016170587A1 - Air curtain device

Info

Publication number: WO2016170587A1
Application number: PCT/JP2015/062026
Authority: WO
Inventors: 金指　忠
Original assignee: 株式会社トルネックス
Priority date: 2015-04-20
Filing date: 2015-04-20
Publication date: 2016-10-27

Abstract

The air curtain device 1 according to the present invention is equipped with: an airtight device body 10 which has an air inlet 11 and an air outlet 15; an air blowing means 12; an air-cleaning unit 13 where sucked in air becomes clean air; and a chamber 14 which stores cleaned air. The chamber has an air blowing control panel 16 which rectifies the cleaned air and sends out the cleaned air as an airflow. The panel 16 has: a blowout portion 16a which is disposed by arranging a plurality of airflow blowout ports 16b, 16c penetrating the panel 16 in such a manner that the airflow blowout ports 16b, 16c surround, in a band shape, the periphery of a projection view P where a target is projected in the direction in which the airflow is sent out; and an airflow guide 16e which is provided on the outer peripheral edge 16d of the blowout portion so as to extend in the direction in which the airflow is sent out.

Description

Air curtain device

The present invention relates to a technique for creating a space where clean air is locally present by supplying clean air to atmospheric air containing contaminants such as cigarette smoke.

喫煙 When smokers and non-smokers are present indoors, there is a need from a health point of view that non-smokers do not want to smoke the smoke emitted by smokers. In particular, there is a high need in situations where it is necessary to spend a certain amount of time in a room where smokers and non-smokers are mixed, such as a conference room, a gaming room such as a casino, and a restaurant / dining room where eating and drinking is performed.

In such places, smokers and non-smokers often face each other across a table. For example, casino customers and dealers. When a card game is played, several customers sit on one side across the game table, a dealer sits on the other side and faces the customer, and the customer smokes. In such cases, smokers pick up cigarettes in their mouths, hold them in front of their chests, or place them in an ashtray on the table, so that the smoke of contaminated cigarettes can be removed from the smoker's front. It diffuses over the table and into the room toward the smoker, and the non-smoker who faces it inhales this diffused smoke.

For this reason, the air curtain apparatus which ejects an airflow between a smoker and a non-smoker and interrupts | blocks the airflow between this is considered.
For example, an air purifier that blows clean air at the bottom of the table is installed, a blow-off port that blows clean air through the center of the table is provided at the center of the table, and the purified air is directed toward the ceiling from the blow-off port There were things that generated a blowout and air curtain flow to block the smoke emitted by the smoker and the smoke rising from the ashtray from spreading beyond the table.

However, although this technology can block smoke that is diffused linearly toward non-smokers, if smoke spreads widely in the room and is contained in the atmosphere, it is not smoked. It was difficult to effectively prevent sneaking into the position.

Further, if such a blowout port is provided in the table, it is necessary to prepare a dedicated table with the blowout port or to modify the existing table to provide a new blowout port.
In addition, in order to shut off, an air flow having a high wind speed is required, which may impair the comfortability of the passengers such as comfort and comfort.

On the other hand, it is also possible to install an air purifier on the ceiling and generate an air curtain flow from the upper side to the lower side of the table to shut off the atmosphere air so as not to require such modification of the table. it was thought.

However, although such a blocking technique is different in the direction of the air curtain flow, it does not differ in that it blows a large amount of air strongly, although it can block smoke that diffuses linearly toward non-smokers, When smoke diffuses widely in the room and is included in the atmosphere air, it is difficult to effectively prevent the smoke from entering the non-smoker's position. In addition, there was a risk that the comfortability of comfort and comfort of the attendees could be impaired.

For this reason, beyond the conventional air flow concept of simply separating the air flow by air curtain flow, while effectively blocking atmospheric air containing pollutants, it does not impair the comfort and comfort. A technique for delivering clean air to a specific target such as a non-smoker and maintaining that state has been desired.

JP 2009-195890 A

The present invention has been made in view of such conventional circumstances, and an object of the present invention is to provide a technique for forming a comfortable clean air region around a target in ambient air containing a pollutant. In particular, the present invention provides an air curtain device and a clean air delivery method suitable for targeting an individual who is in the same room as a smoker for a long time, such as a casino dealer.

<1> The present invention has been proposed in order to achieve the above-described problems, and has the following configuration. That is, an air curtain device that blows clean air toward a target to maintain the air around the target as clean air, and includes an airtight device body having an air inlet and an air outlet, and air from the air inlet. Air blowing means (in the first embodiment, the fan 12), air purifying means (in the first embodiment, the air purifying unit 13) that cleans the sucked air, A chamber for storing air, and this chamber includes a blower control panel that rectifies clean air and sends it out as an air flow. The blower control panel has a plurality of air flow outlets penetrating in the air flow delivery direction. A method of delivering an air flow to the outer periphery of the blowout portion provided on the opposite side of the projection view, having a blowout portion disposed so as to surround the projection view in which the target is projected. It characterized by having a provided air flow guide extends.

As a result, there is an air flow guide provided on the outer peripheral edge of the blowout part extending from the panel surface in the target direction, so the wind speed of the airflow blown from the blowout part is similar in the vicinity of the center of the blowout part and small at both ends. The peak shifts instead of the shape distribution, and the wind speed at the location on the air flow guide side, that is, the outside of the blowout portion increases.
For this reason, the clean air flow rectified by being sent out from the blow-out part flows toward the target, and when reaching the target, the inner air flow is slower than the wind speed of the outer air flow, so it is easy to wrap around the target. Forms a clean air area around it. At this time, the inner air flow tends to maintain comfort even at the target because the wind speed is slower than the outer air flow. On the other hand, the outer air flow flows over the target at a higher wind speed outside the inner air flow, so that ambient air containing pollutants that diffuse toward the target flows into the outer air flow. It becomes difficult to get close to the target.
Therefore, it is possible to easily maintain the target in the state where it is always covered with clean air while maintaining comfort.
In this specification, “clean air” refers to air that is relatively cleaner than the ambient air around the target. Therefore, the case where the atmosphere air is cleaned, the case where it is outside air, the case where the outside air is cleaned, or the case where these are mixed is included.

<2> In this case, the airflow outlet is disposed inside the first type of airflow outlet and the first type of airflow outlet disposed along the outer periphery of the blowout portion. It is preferable that at least a second type airflow outlet is provided, and that the first type airflow outlet has a larger opening cross-sectional area than the second type airflow outlet.

As a result, the opening cross-sectional area on the outside of the blowout portion becomes large, and the rectified clean air flow sent out from the air outlet becomes even faster on the outside than on the inside, so that clean air can easily flow around inside the target. The ambient air containing the pollutant that diffuses toward the target is engulfed by the outside air flow and flows, so that it becomes difficult to approach the target.

<3> In this case, it is preferable that the first type airflow outlet has a rectangular shape having a long side along the outer periphery of the blowout portion.

As a result, the supply amount of clean air is further increased on the outside of the blowout part than on the inside, so that clean air can easily flow around the inside of the target and the ambient air containing contaminants that diffuse toward the target is on the outside. It becomes difficult to get closer to the target because it is caught in the air flow.

<4> In this case, the chamber is preferably a separate body from the apparatus main body.

This makes it possible to increase the degree of freedom of arrangement of the air curtain device of the present invention.

<5> The present invention is also a clean air delivery method for maintaining local air around the target in clean air,
Generating clean air; and
The generated clean air is sent to the target as a band-like air flow surrounding the periphery thereof, and in the cross-sectional wind velocity distribution in the width direction of the band-shaped air flow, the wind speed peak is farther from the target than the center of the distribution. Sending the strip-shaped air stream to shift to a location;
A clean air delivery method is provided.

As a result, a band-shaped air flow is sent out so as to surround the periphery of the target, and in the cross-sectional wind speed distribution, the part far from the target is faster than the part in the center of the distribution, and the part near the target is slower. Since the air is sent out, the wind speed of the belt-like air flow shifts to a location where the peak is far from the target, not the distribution of the similar shape in the vicinity of the center of the blow-out portion and the small ends.
For this reason, the rectified clean air flow sent out from the blowout part flows toward the target, and when it reaches the target, the inner air flow is slower than the wind speed of the outer air flow, so it becomes easier to wrap around the target, To form a clean air area. At this time, the inner air flow tends to maintain comfort even at the target because the wind speed is slower than the outer air flow.
On the other hand, the outer air flow flows over the target at a higher wind speed outside the inner air flow, so that ambient air containing pollutants that diffuse toward the target flows into the outer air flow. It becomes difficult to get close to the target.
Therefore, it is possible to easily maintain the target in the state where it is always covered with clean air while maintaining comfort.

Since the present invention is configured as described above, the target can easily maintain a state in clean air while maintaining comfort.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

1 to 3 show an air curtain device 1 of this example. FIG. 1 is a perspective view showing an embodiment (Example 1) of the air curtain device of the present example. FIG. 2 schematically shows the inside of the apparatus of the first embodiment. FIG. 3 is a schematic central sectional view of FIG.

As shown in FIGS. 1 to 3, the air curtain device 1 of the present example is a self-supporting type, and sucks air from the lower surface of the device body 10 and sucks air by an air cleaning unit 13 provided in the device body 10. Is sent to the target T as a rectified air stream 22 from the air outlet 15 of the air blowing control panel 16 provided in the chamber 14. This will be described in more detail below.

(Device body)
As shown in FIGS. 1 and 2, the apparatus main body 10 is a box-shaped housing, and the inside thereof is hermetically sealed from an air inlet 11 to an air outlet 15 as will be described later. An air suction port 11 for sucking air is provided on the lower surface of the apparatus main body 10, and an air cleaning unit 13 and then a fan 12 are provided in the interior from the bottom, and are connected to the chamber 14. The chamber 14 is provided with a ventilation control panel 16 having an air outlet 15.

There are two leg portions 10a on the lower surface of the apparatus main body 10, whereby the air curtain apparatus 1 of this example can stand by itself.
Moreover, if the height of the leg 10a is changed or replaced by a known means, the height of the air outlet 15 can be arbitrarily determined. For example, in FIGS. 9 and 10 to be described later, the target T is set to sit on a chair, but if it is standing up, the height of the delivery port can be adjusted accordingly.

(Air purification unit)
As shown in FIGS. 2 and 3, the air purification unit 13 includes a prefilter 13a, an electrostatic precipitator 13b, and a deodorizing filter 13c in that order from the lower side of the apparatus. As shown by the arrows in FIG. 3, the unclean air 20 sucked by the fan 12 from the air suction port 11 provided on the lower surface of the apparatus main body 10 passes through the prefilter 13a and the electrostatic precipitator 13b in order. The particles are removed, and gas components such as gas that emits odor contained in the air are removed through the deodorizing filter 13c. The air 21 cleaned in this way is sent to the chamber 14 by the fan 12.
In addition, although the air purification unit of this example is comprised from three elements, the prefilter 13a, the electrostatic precipitator 13b, and the deodorizing filter 13c, depending on the state of the inhaled air, what has another function may be added, Can be reduced, and further, the performance of individual elements can be improved. For example, outdoor air can be sucked by connecting an air duct to the apparatus main body instead of indoor air, but in that case, it may be appropriately selected depending on the outdoor air condition.

(Air purification unit: Pre-filter)
The pre-filter 13a removes coarse particles floating in the air sucked from the air suction port 11 as a pre-stage of the electric dust collector 13b, and is composed of a nonwoven fabric or a mesh-like wire net. The target is mainly visible particles, and particles having a particle diameter of 10 to 20 μm can be removed. Through the pre-filter 13a, early clogging can be prevented to save maintenance, and the electric dust collector 13b can efficiently remove fine particles.

(Air purification unit: electric dust collector)
The electrostatic precipitator 13b is located immediately above the air suction port 11 through the prefilter 13a, and removes finer particles floating in the air sucked into the apparatus main body 10. The target is mainly those having a particle size of 0.3 μm or more.

As the electrostatic precipitator 13b, a so-called two-stage charged electrostatic precipitator can be used. The electrostatic precipitator 13b includes an ionization unit having an ionization line and an ionization electrode for charging floating particles in the air by corona discharge or the like, a dust collection electrode plate for collecting charged floating particles by an electric field, and dust collection. There are provided a dust collecting section in which counter electrode plates are alternately arranged and arranged at equal intervals by a spacer, and a power source for supplying power to the ionization section and the dust collecting section. Such an electrostatic precipitator 13b has a structure in which air passes between the ionization line and the ionization electrode and between the dust collection electrode plate and the dust collection counter electrode plate. Can be efficiently removed.

(Air purification unit: deodorizing filter)
As shown in FIG. 3, a deodorizing filter 13c is provided at the subsequent stage of the electrostatic precipitator 13b. As the deodorizing filter 13c, a known sheet-like filter having air permeability can be used. The air from which the suspended particles are removed is sucked into the fan 12 and passes through the deodorizing filter 13c.

(fan)
As shown in FIGS. 2 and 3, the apparatus main body 10 is provided with a fan 12 for sucking and sending air. The fan 12 creates a negative pressure in the apparatus main body 10 and sucks air from the air suction port 11, and pushes the cleaned air into the chamber 14. Finally, the air flows from the air outlet 15 toward the target T. Deliver clean air. A fan 12 having a capacity and pressure that covers the amount of air blown from the air outlet 15 can be used.

(Chamber)
As shown in FIGS. 2 and 3, the chamber 14 has a substantially rectangular parallelepiped box shape and constitutes the upper part of the apparatus main body 10. The lower surface of the chamber 14 is connected to the apparatus main body 10 and has a structure in which the clean air generated by the air cleaning unit 13 by the fan 12 is pushed into the inside. As a result, the pushed-in clean air is adjusted so that it is accumulated in the chamber 14 to a constant pressure.

(Blower control panel)
A blower control panel 16 is fitted on the front side of the chamber 14, and the blower control panel 16 has a blowout portion 16 a that sends clean air as a rectified air flow. And the air flow guide 16e extended in the target direction from the surface of the ventilation control panel 16 is provided in the outer periphery 16d of the blowing part 16a.

(Blowout part)
As shown in FIG. 2, the target T for delivering clean air is supposed to be a person, and when the apparatus 1 of this example is installed behind the person and the clean air is sent toward the target, The blowing portion 16a is arranged so that clean air blows around the person. That is, it is provided in a band shape so as to be blown out so as to surround the projection P in which the target T is projected onto the blower control panel 16 in the blowing direction of the air flow.

Here, in the band shape, the direction along the periphery of the projection P is the longitudinal direction of the band, and the direction orthogonal to this is the width direction of the band. Moreover, even if it says to enclose, it does not enclose completely and an air flow does not need to blow off at one part. As described above, since the target T is assumed to be a person, the blowout part 16a is provided evenly on the left and right along the arm line of the person, and a part of the air blow control panel near the center is short. There is no air outlet. Since the head is generally sensitive to wind, the blowing portion 16a is divided into two parts so that no airflow is applied near the apex of the head.
Depending on the situation, the blowing part 16a may be a gate-shaped blowing part that is blown by connecting the left and right sides as in this example, and may be an arched type instead of the portal type. Good. Furthermore, you may change the width | variety of a blowing part.

FIG. 4 shows a front partial enlarged view of the blower control panel 15 at the top of the chamber 14 of the present embodiment. Here, a corner portion of the air blowing control panel 16 provided with the blowing portion 16a is shown. As shown here, a blowing portion 16 a is provided in a band shape around the panel 16 when viewed from the front of the air blowing control panel 16.

The blow-out part 16a is a plurality of through slits 16b and through-holes 16c opened in the air blowing control panel 15 as will be described later, and the clean air sent from the chamber 14 passes through the air blowing part 16a of the air blowing control panel 15. As a result, a rectified air flow (air curtain flow) 22 is generated.

(Air flow guide)
As shown in FIG. 4, the airflow guide 16e is provided on the outer periphery of the blowout portion 16a. The blowing part 16a is provided along the peripheral edge of the air blowing control panel 15, and the air flow sent out from the surface of the air blowing control panel 15 along the outer peripheral edge 16d of the air blowing part 16a (the direction of the target T). It is formed to extend.
As will be described later, the air flow guide 16e shifts the peak of the air flow distribution to the outside and acts to reach the rectified air far away.

FIG. 5 shows a partially enlarged view of the upper part of the chamber as seen from the side of this embodiment. As shown in FIG. 5, when viewed from the side of the apparatus 1, the air blow control panel 16 is fitted into the rectangular opening of the chamber 14 so as to sink by the height of the air flow guide 16 e. That is, the air flow guide 16e is formed at a predetermined height so as to be higher than the surface of the air blowing control panel 16.

(Air flow outlet)
As shown in FIG. 4, the first type of air flow that is a through slit arranged along the side of the blowing portion 16 a where the air flow guide 16 e is provided (that is, the outer peripheral edge 16 d of the blowing portion 16 a). The blowout port 16b has a rectangular cross section (slit shape), and the second type of air flow blowout port 16c, which is a through hole disposed inside the blowout port 16b, has a circular cross section (round hole shape). The former is formed to have a larger opening area than the latter.
Many through-holes 16c can be provided in the shape of a punching metal depending on conditions such as a set air volume.

As described above, the air curtain device 1 includes the airtight device main body 10 having the air suction port 11 and the air delivery port 15, the air cleaning unit 13 for cleaning the sucked air, and the chamber for storing the cleaned air. 14. In this case, the chamber 14 may be separated from the apparatus main body 10 and separated (not shown). For example, the chamber 14 and the air cleaning unit 13 may be connected in a gastight manner with a duct or the like and installed in different places. If it does so, although the apparatus main body 10 will be isolate | separated into two, the freedom degree of the layout of the installation at the time of installing the air curtain apparatus 1 can be made high.

Next, the operation of this apparatus will be described.
(Operation of air cleaner)
3, when the fan 12 is operated, a negative pressure is generated in the vicinity of the air suction port 11, and the ambient air 20 around the air suction port 11 enters the apparatus main body 10 from the air suction port 11. Inhaled, first, coarse particles floating in the air are removed by the pre-filter 13a. Next, fine particles floating in the air are removed by the electric dust collector 13b. When the atmospheric air 20 passes through the electric dust collector 13b, the suspended particle component contained in the air is removed. In this example, about 90% is removed.

Subsequently, the air enters the deodorizing filter 13c, comes into contact with an adsorbent (not shown) in the deodorizing filter 13c, and gas components such as gas that emits odor are removed.
The air 21 purified by passing through the deodorizing filter 13c enters the fan 12 and is sent to the chamber 14 by the fan 12 as shown by the upward white arrow in FIG. It is sent out as a rectified air flow (air curtain flow) 22 toward the target T outside the air curtain device 1.

(Action of air flow)
FIG. 7 shows a schematic plan view of the flow of the rectified air flow 22 and FIG. 9 shows a schematic side view of the flow of the rectified air flow 22. The rectified clean air flow 22 delivered from the air outlet 15 of the air curtain device 1 flows toward the target T while gradually spreading, but the back surface of the target T (as viewed from the air curtain device 1) along the target T. ), The air flow advances.

At this time, if the outer flow 22a of the sent air is made faster than the inner flow 22b, this sneak occurs more and a staying portion 22c such as overflow is formed. That is, the rectified clean air flow sent out from the blowing part 16a flows toward the target T, and when reaching the target T, the inner air flow 22b wraps around the target T, and the clean air region 22d is surrounded around the target T. Form. On the other hand, the outer air flow 22a flows over the target T on the outer side of the inner air flow 22b. As a result, most of the atmospheric air containing pollutants that diffuse from the outside of these

air streams

22a, 22b, and 22c toward the target T is entrained and flowed in the outside air stream 22a, and also by the inside air stream 22b. Diffusion in the target direction is also hindered. This state is the same on the upper surface side of the target. Accordingly, the atmospheric air is less likely to approach the target from the front, side, and upper surface of the target T.

This state can be compared to the case where the target T is in a tunnel or curtain created by the air flow 22 sent out from the blow-out part 16a of the blower control panel 16 provided in a belt-like shape. Atmospheric air that is supplied from the apparatus 1 and diffuses so as to approach the target from the outside flows into the air flow 22 and is prevented from entering the inside. In particular, since the outer air stream 22a is faster than the inner air stream 22b, the ambient air is likely to flow along with the outer air stream 22a. Therefore, if the target T is a human body, especially if the target T is a human body, the clean air region 22d can be created around the respiratory organ such as the mouth and nose, and the target is always inside the clean air. It can be easier to maintain.

Furthermore, with reference to FIG. 6, the wind speed distribution of the air flow when the belt-like air flow 22 surrounding the target T is sent out in relation to the configuration of this example will be described. FIG. 6 shows an air flow having a constant cross-sectional shape and a cross-sectional area in which the x-axis is the width direction of the cross section of the air flow in a plane at a fixed distance from the air outlet and the w axis is the flow velocity of the air flow. When there is only the blowout port (FIG. 6B), when a blowout slit having a different cross-sectional shape with a large cross-sectional area is added to the end of the airflow blowout port (FIG. 6C), further, When the air flow guide 16e as in this example is present at the end (FIG. 6A), the wind speed distributions are compared and contrasted.
In the upper part of each figure, the horizontal axis X represents the position from the cross section of the blowout part, and the vertical axis W represents the wind speed. The lower part of each figure is a schematic plan view of a blowout portion corresponding to the wind speed distribution in the upper part, and the middle part of each figure is a schematic sectional view thereof.

First, as shown in FIG. 6 (b), consider a strip-shaped blowing portion 16a extending vertically at the end of the chamber. In this case, it is expected that the wind speed is the fastest at the central portion c, and both ends are symmetrically slowed about this, and the distribution is symmetrical as shown in the figure and the central portion c has a peak. It is thought that it becomes a convex wind speed distribution.

On the other hand, as shown in FIG. 6C, if the slit 16d having a relatively large opening area is provided along the wall as in this example, the air supply amount on the outer side (left side of the paper surface) As the flow rate increases and the flow velocity becomes faster, the wind speed distribution rises slightly from the center c to the end side (left side in the figure) and stands slightly. It is thought that the shape is convex but slightly distorted and asymmetric. .
Further, as shown in FIG. 6 (a), when the air flow guide 16e is provided, air easily flows along the guide, so that the wind speed distribution is further shifted to the end side and the degree of asymmetry is increased. , The peak is thought to come up.
Thus, it is considered that the wind speed distribution is biased so that the outer wind speed is faster than the inner wind speed due to the configuration of the blowing portion 16a and the air flow guide 16e employed in this example. The basis is shown in the following test example.

(Effects of outlet and air flow guide)
Below, based on FIG. 11, the advantage of this invention is demonstrated and shown experimental data.
As for the present embodiment, as described below, the wind speed of the blowout portion 16a is compared between the case near the end (hereinafter referred to as case P) and the case where it is far away (hereinafter referred to as case C). / Measured by taking the ratio of the wind speed of case C. In this test example, the wind speed at each point was measured using a hot-wire anemometer (Model 3451 manufactured by KANOMAX).

<Test Example 1>
The air curtain device 1 of this example is placed indoors and provided with an air flow guide 16e and a through slit 16b as shown in FIG. 12, case P (A1 to F1 close to the end) and case C (center portion). The ratio of the wind speed in A2 to F2), that is, A1 / A2, B1 / B2, C1 / C2, D1 / D2, E1 / E2, and F1 / F2 are sampled and belong to the end case P at any point. The wind speed was higher at the points (A1 to F1) than the points (A2 to F2) belonging to the center case C, and 1.30 was obtained as the average value of the wind speed ratio.

This result shows that the wind speed in the case C at the end is about 30% higher than the case P in the center on average, and the basis for thinking that the shift in the wind speed distribution estimated in FIG. 6 will be correct. It will be one. Therefore, as described above, it can be said that the effects of the through slit 16b having a large opening area and the air flow guide 16e are shown.

(Usage example 1)
FIG. 8 is a schematic diagram in which the air curtain device 1 of the present example is installed behind the casino gaming table 2. FIG. 9 shows a schematic view seen from the front. Thus, when one seated person is targeted, by installing the air curtain device 1 of this example behind the seated person, it is possible to make it easier for the person to maintain a state in clean air. In this example, for example, as a single-person air cleaning device, it is possible to easily create a so-called storage place for clean air in a sealed space such as a room even in atmospheric air containing pollutants such as cigarette smoke. There is an advantage that it is not necessary to take a strong air blow.

In this case, it is desirable that the distance between the person and the device 1, that is, the outlet of the rectified air flow is as close as possible. Thereby, entrainment of atmospheric air can be further reduced. Moreover, it is desirable that the initial velocity of the outside air flow is 3 m / s or more from the viewpoint of hindering the atmospheric air toward the person. Furthermore, in relation to the comfort felt by the person, the wind speed when the inner airflow reaches the person is preferably 2 m / s or less, and more preferably 1.5 m / s or less. The minimum value of the air velocity of the air flow can be determined according to various conditions of the use environment such as how much disturbance to the air flow (air conditioner, other blower, traffic of people) occurs.

In addition, this example does not prevent using the apparatus which generate | occur | produces an air curtain flow further on the front side of a target depending on use environment. For example, an air outlet may be provided in the central part of the casino table, and an air curtain flow may be generated upward from the air outlet so as not to hit a surrounding person. In this way, atmospheric air can be effectively prevented from diffusing from the front side of the target (the opposite side across the casino table). Then, it is possible to reduce the atmospheric air from diffusing into the clean air around the target.

(Usage example 2)
The apparatus 1 may be used by being embedded in a wall K as shown in FIGS. 10 and 11 when used in a casino or the like. In that case, an opening Ka for sucking atmospheric air and an opening Kb for sending clean air can be provided in the wall K and can be stored in the wall K.
If it does so, atmospheric air can be suck | inhaled from an inlet via the opening Ka similarly to the usage example 1, and clean air can be sent out via the opening Kb.
In addition to casinos, it may be convenient to embed in a wall in this way because of the layout in the room.

(Usage example 3)
The apparatus 1 sucks indoor atmospheric air, cleans the air, and delivers the air, but it may suck outside air or air in another room. For example, an air duct or the like may be used to connect to an air inlet (not shown) provided on a wall surface that is a partition between the air suction port 11 and the outdoor wall provided on the wall surface or another room. In that case, the

elements

13a, 13b, and 13c for cleaning used in the air cleaning unit 13 can be appropriately added or reduced depending on the state of the air to be sucked, and the function can be enhanced or suppressed. In some cases, it can be omitted.
Further, instead of sucking only the outside air or the room air in another room, the room air and the outside air may be mixed and sucked.

As described above, the embodiment of the present invention has been described mainly with the example where the target is a human body, but the present invention is not limited to the above-described embodiment.

INDUSTRIAL APPLICABILITY The air curtain device of the present invention can be used in the field of local air purification in a closed space where a plurality of persons such as smoking rooms live or work.

It is a perspective view which shows embodiment (Example 1) of the air curtain apparatus of this invention. The inside which opened the lower surface panel of Example 1 is shown typically. FIG. 3 is a schematic central sectional view (III-III view) of FIG. 2. FIG. 4 is an enlarged partial front view of the air blow control panel at the upper part of the chamber according to the first embodiment. FIG. 3 is an enlarged side view of a side portion of the upper portion of the chamber according to the first embodiment. It is explanatory drawing of the airflow blower outlet and airflow guide of the ventilation control panel of FIG. 2 is a plan view of an air flow in Example 1. FIG. 2 is a perspective view showing an example of use of Example 1. FIG. It is a side view of the usage example (with a target) of Example 1. 6 is a plan view of another usage example of Embodiment 1. FIG. 6 is a front view of another usage example of Embodiment 1. FIG. It is a figure which shows the wind speed measurement location of Example 1. FIG.

DESCRIPTION OF SYMBOLS 1 Air curtain apparatus 2 Table 3 Chair 10 Apparatus main body 11 Air inlet 12 Air blowing means (fan)
13 Air purification means (air purification unit)
13a Pre-filter 13b Electric dust collector 13c Deodorizing filter 14 Chamber 15 Air delivery port 16 Blower control panel 16a Outlet part 16b First type air flow outlet (through slit)
16c Second type air flow outlet (through hole)
16d Outer peripheral edge 16e Air flow guide 20 Unclean air 21 Cleaned air 22 Purified air 22 Sending air flow 22a Sending air flow (outside) 22b Sending air flow (inside)
22c Retention point 22d Clean air area A1 to F1 Measurement point (outer edge)
A2 ~ F2 measuring point (center)
D Air duct K Wall surface Ka, Kb Opening P Target projection T Target

Claims

An air curtain device that blows clean air toward a target and maintains the air around the target in clean air,
The air curtain device includes an airtight device body having an air inlet and an air outlet, an air blowing means for sucking air from the air inlet and sending air from the air outlet, and cleaning the sucked air An air purifying means for converting air into a chamber for storing the clean air;
The chamber includes a ventilation control panel that rectifies the clean air and sends it out from the air outlet as an air flow,
The blower control panel has a blow-out portion in which a plurality of penetrating air flow outlets are arranged so as to surround a projection around the target projected in the air flow sending direction, in a band shape,
An air curtain device having an air flow guide provided in an outer peripheral edge of the blowout portion on the side opposite to the projection view so as to extend in the air flow sending direction.
The airflow outlet is a first type of airflow outlet arranged along the outer periphery of the blowout portion, and a second type of airflowoutlet arranged inside the first type of airflow outlet. 2. The air curtain device according to claim 1, comprising at least one type of airflow outlet, wherein the first type of airflow outlet has a larger opening cross-sectional area than the second type of airflow outlet.
The air curtain device according to claim 1 or 2, wherein the first type air flow outlet has a rectangular shape having a long side along the outer peripheral edge of the blowout portion.
The air curtain device according to any one of claims 1 to 3, wherein the chamber is separate from the device main body.
A clean air delivery method for maintaining local air around the target in clean air,
Generating clean air; and
The generated clean air is sent to the target as a band-like air flow surrounding the periphery thereof, and in the cross-sectional wind velocity distribution in the width direction of the band-shaped air flow, the wind speed peak is farther from the target than the center of the distribution. Delivering the strip-shaped air flow to shift to a location.