JP2010117118A - Doorway shutoff device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a doorway shutoff device free from leakage of cigarette smoke to a non-smoking room side even when a wind velocity of the inflow air at a doorway between a smoking room and the non-smoking room is less than 0.2 m/sec., and capable of easily opening and closing a door of the non-smoking room. <P>SOLUTION: The inside of a room 2 is divided into the smoking room 3 and the non-smoking room 4, the doorway 5 is disposed therebetween, a throttle 6 and an air curtain generator 7 are disposed at the doorway 5, and an air discharger 8 is disposed at a smoking room 3 side, so that the inflow air 9 from the non-smoking room 4 side to the smoking room 3 side is generated by the air discharger 8 in opening the doorway 5, the doorway 5 is shut off by the air curtain 10 from the air curtain generator 7, and the inflow air 9 is straightened by the throttle 6 to suppress disturbance of the air at the doorway 5 by the air curtain 10, thus the leakage of the air in the smoking room 3 to the non-smoking room 4 side can be prevented even when the inflow air 9 at the doorway 5 flows at less than 0.2 m/sec., and the task can be accomplished. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention divides a room into a smoking room and a non-smoking room, an entrance is provided between them, and an air exhaust is provided on the smoking room side, regardless of whether the entrance is open or closed. The present invention relates to an entrance / exit blocking device that prevents smoke from leaking to the non-smoking room side.

  Conventionally, when a smoking room is provided in one corner of a room, even if a door is provided at the entrance / exit of the smoking room, when the door is opened / closed, smoke from the smoking room passes through the entrance / exit and is not smoked. It is stipulated in the "Guidelines for Smoking Control in the Workplace" that the Labor Standards Bureau of the Ministry of Health, Labor and Welfare will prevent leakage to the room side. In this guideline, it is recommended that the wind speed of the air flowing into the smoking room from the non-smoking room side at the entrance / exit is always maintained at 0.2 m / second or more.

  Therefore, if the size of the entrance / exit is 1 m (width) x 2 m (height), the exhaust fan of 0.2 m / sec x 1 m x 2 m x 60 sec / min = 24 m3 / min can be used for the area and volume of the smoking room. Regardless, it must be provided in the smoking room, and air equivalent to 24 m 3 / min is discharged from the non-smoking room through the smoking room and the smoking room.

  As described above, if the wind speed of the air flowing into the smoking room from the non-smoking room side at the entrance / exit is kept at 0.2 m / sec or more, air equivalent to 24 m3 / min is discharged from the smoking room or non-smoking room to the outside. As a result, excessive energy loss occurs in winter and summer when the temperature difference between the inside and outside of the country is large, and the capacity of the exhaust fan itself increases and the running cost increases. In addition, when a door is provided in a non-smoking room connected to the smoking room by the entrance and the door opens to the outside of the non-smoking room, it is difficult to close due to wind pressure but it is easy to close, conversely, the door is inside the non-smoking room In the case of opening, the phenomenon that it is easy to open but is difficult to close due to wind pressure occurs. In addition, if the capacity of the exhaust fan installed in the smoking room is small and the wind speed of the air flowing into the smoking room from the non-smoking room side at the entrance / exit cannot be secured at 0.2 m / second or more, replacement of the exhaust fan Is required.

  Then, this invention was made | formed in view of the said situation, The wind speed of the air which flows in into the smoking room side from the non-smoking room side in the entrance / exit between a smoking room and a non-smoking room is less than 0.2 m / sec. However, it is an object of the present invention to provide an entrance / exit blocking device that prevents cigarette smoke from leaking from the smoking room side to the non-smoking room side and that can easily open and close the door of the non-smoking room.

The present invention has been proposed in order to achieve the above-mentioned problems, and is characterized by having the following configuration.
That is, the invention according to claim 1 divides the room into a smoking room and a non-smoking room and has an entrance / exit between them, and a throttle is provided at the entrance / exit and an air exhaust is provided on the smoking room side. When the inlet / outlet is opened, inflow air from the non-smoking room side to the smoking room side is generated by the exhaust fan, and the inflow air is rectified by the throttle, so that the flow rate of the inflow air is reduced to 0. 0. The doorway shut-off device characterized in that it can prevent the air in the smoking room from leaking to the non-smoking room side even when the speed is lower than 2 m / sec.

  According to a second aspect of the present invention, there is provided an entrance / exit blocking device in which the throttle extends at least 200 mm in the horizontal direction of the entrance / exit.

  According to a third aspect of the present invention, an air curtain generator is provided at the entrance and exit described above, the entrance and exit is blocked by the air curtain from the air curtain generator, the inflow air is rectified by the throttle, and the air curtain The air in the smoking room can be prevented from leaking to the non-smoking room side even if the flow rate of the inflow air at the doorway is reduced to less than 0.2 m / sec. Is an entrance / exit shut-off device.

  According to a fourth aspect of the present invention, there is provided an entrance / exit shut-off device, wherein the air curtain generator is provided with a function of cleaning the air in the smoking room.

As described above in detail, the present invention has the following effects.
According to the first aspect of the present invention, when the entrance / exit is opened, the inflow air at the entrance / exit by the exhaust fan is rectified by the throttle, and the inflow direction is directed to the smoking room side. Therefore, even if the wind speed of the inflow air from the non-smoking room side to the smoking room side at the entrance / exit is reduced below 0.2 m / sec, the smoke of the cigarette in the smoking room can be prevented from leaking to the non-smoking room side. There is an effect that the door installed in the non-smoking room can be easily opened and closed.

  According to the second aspect of the present invention, when the throttle extends at least 200 mm or more in the horizontal direction of the entrance / exit, the inflow air at the entrance / exit can be rectified to direct the inflow direction toward the smoking room. Therefore, there is an effect of ensuring the above effect.

  According to the third aspect of the present invention, the air curtain from the air curtain generator shuts off the air in the smoking room at the entrance and exit, the flow restricts the inflow air at the entrance and exit by the exhaust fan, and the entrance and exit by the air curtain. Relieve air turbulence and direct the inflow direction of inflow air toward the smoking room. Therefore, even if the wind speed of the air flowing from the non-smoking room side to the smoking room side at the entrance / exit is reduced below 0.2 m / sec, the smoke of the cigarette in the smoking room does not leak to the non-smoking room side more reliably. It is possible to easily open and close the door installed in the non-smoking room.

  In the invention according to claim 4, after the air in the smoking room is cleaned by the cleaning function added to the air curtain generator, the air is blown out as an air curtain and the air in the smoking room is shut off at the doorway. Therefore, in addition to the above-described effect, even if the air curtain is not sufficiently relaxed due to the air curtain due to the restriction, the air curtain source is clean air, so that there is no particular effect.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a perspective view of an entrance / exit blocking device showing an embodiment of the present invention, and FIG. 2 is a sectional view of an air curtain generator with an air cleaner of the entrance / exit blocking device of FIG. In the drawing, an entrance / exit blocking device 1 divides a room 2 into a smoking room 3 and a non-smoking room 4 and has an entrance / exit 5 between them, and the entrance / exit 5 is provided with a throttle 6 and an air curtain generator 7. In addition, when the ventilator 8 is provided on the smoking room 3 side and the entrance / exit 5 is opened, inflow air 9 is generated by the ventilator 8 from the non-smoking room 4 side to the smoking room 3 side, and an air curtain generator 7, the inlet / outlet 5 is blocked by the air curtain 10, and the inflow air 9 is rectified by the throttle 6, so that the disturbance of the air at the inlet / outlet 5 by the air curtain 10 is alleviated, and the flow rate of the inflow air 9 at the inlet / outlet 5 is reduced. The air in the smoking room 3 can be prevented from leaking to the non-smoking room 4 side even if the speed is lowered from 0.2 m / sec.

  The room 2 includes all kinds of houses such as general houses, commercial and industrial facilities, public facilities, and transportation facilities. The room 2 is divided into a smoking room 3 and a non-smoking room 4. It becomes an installation target of the entrance / exit blocking device 1. Furthermore, the entrance / exit 5 is an installation target of the entrance / exit blocking device 1 regardless of whether there is a door.

  The exhaust fan 8 is assumed to be installed on the smoking room 3 side, but even if it is not installed, there is no particular problem as long as it can be installed later. Since the capacity of the exhaust fan 8 is determined by the number of ventilations in the room 2 that is normally installed, the room 2 is divided into a smoking room 3 and a non-smoking room 4, and non-smoking at the entrance / exit 5 thereof. In many cases, the flow velocity of the inflowing air 9 entering the smoking room 3 side from the room 4 side is less than 0.2 m / second, which is the recommended value of the above guidelines. The capacity of the exhaust fan 8 is, for example, 0.9 m × 1.8 m × 0.2 m / sec × 60 sec / min = 19.44 m 3 / min when the size of the entrance / exit 5 is 900 mm wide × 1800 mm high, and smoking Regardless of the size of the chamber 3, the capacity of the exhaust fan 8 is determined. In this calculation example, the size of the entrance / exit 5 is 900 mm wide × 1800 mm high, but due to the improvement of the Japanese physique and the increase in foreigners, the recent trend is about 1000 mm wide × 2000 mm high. Yes.

  The diaphragm 6 has a horizontal dimension L1 of the entrance / exit 5 extending at least 200 mm or more, for example, at least 200 mm toward the smoking room 3 side of the entrance / exit 5 in the horizontal direction. That is, the diaphragm 6 is formed by providing plates 20, 21, and 22 having a dimension L1 of 200 mm or more on both side surfaces and the ceiling surface of the entrance / exit 5. As will be described in detail later, these plates 20, 21, and 22 have a sufficient effect as long as they are 200 mm or more, and a better effect is obtained as they become longer. However, in terms of economy and efficiency, the limit is about 500 mm. It seems to become. In the case of FIG. 1, the plate 22 also serves as a side plate of the air curtain generator 9.

  As shown in FIG. 2, the air curtain generator 7 generates an air curtain 10, and includes a square pipe 30 having an opening 31 for connecting an air purifier 40, which will be described later, and an opening. A plurality of air passages 33 having substantially the same shape provided continuously on the wall surface 32 of the square pipe 30 extending from the installation location 30a to the upper portion 30b separated by a predetermined length from 31 and each air passage installed in the square pipe 30 At least an air volume adjusting plate 34 that freely adjusts the amount of air that passes through each inner opening 33a. The distance L2 between each inner opening 33a of each air passage 33 and the air volume adjusting plate 34 is expressed as follows. The air curtain 10 is generated by rotating and adjusting in the direction of the arrow A as a fulcrum so that the air exiting from each outer opening 33b of each air passage 33 is made to flow uniformly. The method for generating the air curtain is not particularly limited, and for example, an ion wind may be used.

  And the function which cleans the air in the smoking room 3 connects the air cleaner 40 to the opening part 31 of the air curtain generator 7. FIG. This air cleaner 40 has a suction port 42 and a discharge port 43 in its body 41, and further, a cleaning filter 44 and a blower 45 are built in the downstream of this body 41.

  The cleaning filter 44 includes a prefilter 46 that removes relatively large particles such as cigarette smoke sucked into the airframe 41 from the suction port 42, and an electric dust collector 47 that removes fine particles that have passed through the prefilter 46. The deodorizing filter 48 that removes ultrafine particles, odorous components, and the like that have passed through the electric dust collector 47 has a three-part configuration. Further, instead of the electric dust collector 47, a mechanical filter capable of removing at least fine particles may be used, and a high-performance mechanical filter having a function of removing ultrafine particles and odor components may be used in combination.

  The blower 45 can suck the air curtain 10 from the air curtain generator 7, that is, the air in the space surrounded by the air curtain 10 and the smoking room 3 from the suction port 42, It passes through the cleaning filter 44 in the body 41 of the cleaner 40, is further delivered from the outlet 43 to the opening 31 of the air curtain generator 7, enters the square pipe 30, passes through each air passage 33 There is no particular limitation except that the conditions having the basic capacity and pressure required to become the set air curtain 10 are added.

  And when the air blower 45 of this air cleaner 40 is operated, the air containing the smoke of the cigarette in the smoking room 3 is sucked into the airframe 41 from the air inlet 42, and is cleaned by the cleaning filter 44. The purified air is transferred from the discharge port 43 to the opening 31 of the air curtain generator 7 and enters the square pipe 30 and passes through each air passage 33 to become a set uniform flow, that is, a high-quality air curtain 10. The entrance / exit 5 can be divided by the cleaning air. Therefore, the air curtain generator 7 with the air cleaner 40 can clean contaminated air such as cigarette smoke and can reliably separate the room 2 from the high-quality air curtain 10.

Next, the use situation of the entrance / exit blocking device 1 configured as described above will be described.
First, when the exhaust fan 8 is operated, even if the air curtain generator 7 with the air purifier 40 is not operated, if the entrance / exit 5 is opened, the entrance / exit 5 is moved from the non-smoking room 4 side to the smoking room 3 side. Inflow air 9 is generated. The flow velocity of the inflow air 9 is determined by the capacity of the exhaust fan 8 and the area of the entrance / exit 5, and if the recommended value of the guideline is 0.2 m / sec, the air in the smoking room 3 leaks to the non-smoking room 4 side. There is nothing. Even if the flow velocity of the inflow air 9 is less than 0.2 m / sec, the inflow air 9 is rectified by the throttle 6 at the entrance 5 and the inflow direction is directed to the smoking room 3 side. Tobacco smoke does not leak to the non-smoking room 4 side, and the flow rate of the incoming air 9 is slow, so that the door in the non-smoking room 4 can be easily opened and closed.

  Next, when the air curtain generator 7 with the air purifier 40 is operated, that is, when the blower 45 is operated, the air containing the smoke of the cigarette in the smoking room 3 from the suction port 42 of the air purifier 40. Into the machine body 41 and cleaned by the cleaning filter 44, and the cleaned air is transferred from the discharge port 43 to the opening 31 of the air curtain generator 7 and enters the square pipe 30 to each air passage 33. The air flow is set to a uniform flow, that is, a high-quality air curtain 10, and the air in the smoking room 3 is reliably blocked at the entrance / exit 5 by the high-quality air curtain 10, and in addition to the above, As described above, the restriction 6 rectifies the inflow air 9 at the entrance / exit 5, and reduces the disturbance of the air at the entrance / exit 5 due to the air curtain 10. Can toward reliably ingress direction the smoking chamber 3 side. Therefore, even if the wind speed of the air flowing from the non-smoking room 4 side to the smoking room 3 side at the entrance / exit 5 is reduced to 0.2 m / sec, the smoke of the cigarette in the smoking room 3 is more reliably transferred to the non-smoking room 4. Even if there is a door in the non-smoking room 4, it can be opened and closed easily.

  3 and 4 show an entrance / exit blocking device 1A according to another embodiment of the present invention. The difference from the entrance / exit blocking device 1 shown in FIGS. 1 and 2 is that an air curtain generator 7A is provided on the ceiling surface of the entrance / exit 5. The air curtain 10A is blown down from the air curtain generator 7A. The air curtain generator 7A employs a cross flow fan type blower 45A that can directly form the air curtain 10A because the width of the air curtain 10A is small. Other configurations and operations are the same as those of the doorway shut-off device 1 shown in FIGS. In addition, you may attach the air cleaner 40A shown by a dotted line to the air curtain generator 7A, and this air cleaner 40A is also substantially the same as the air cleaner 40 of FIGS. The description is omitted.

Below, since the superiority of the doorway shutoff device of the present invention was proved, it is shown below.
<Reference value measurement>
First, the flow rate of inflow air at the entrance / exit is set to 0.2 m / sec, the dust concentration on the non-smoking room side is measured in the case of no restriction, and the amount of dust leakage is set as a reference value.
<Measurement example 1>
The flow rate of inflow air at the entrance / exit is 0.1 m / sec, and the dust concentration on the non-smoking room side is measured in each case where the size of the throttle is 100 mm, 200 mm, 350 mm, and 500 mm. That is, the dimension of the aperture (mm) is taken on the horizontal axis, the amount of dust leakage (mg / m3) is taken on the vertical axis, and the amount of dust leakage at each aperture size is plotted and plotted.
<Comparative example 1>
The flow rate of the inflow air at the entrance / exit is 0.1 m / second, and the dust concentration on the non-smoking room side is measured in the case of no throttle.
<Measurement example 2>
The flow rate of inflow air at the entrance / exit is set to 0.05 m / second, and the dust concentration on the non-smoking room side is measured in each case where the size of the throttle is 100 mm, 200 mm, 350 mm, and 500 mm. The amount of dust leakage in the dimensions of each aperture is plotted and graphed in the same manner as in Measurement Example 1. These are shown in FIGS.

  According to FIG. 5, when the size of the throttle is 200 mm or more, even if the flow rate of the inflowing air at the entrance / exit is 0.1 m / second, the result is almost the same as the case of 0.2 m / second which is the recommended value of the guideline. Obtained. In addition, according to FIG. 6, when the size of the throttle is 500 mm or more, even if the flow rate of the inflowing air at the inlet / outlet is 0.05 m / second, the same result as in the case of 0.2 m / second is obtained. It was. Therefore, the superiority of the doorway shut-off device of the present invention could be demonstrated.

  As described above, the first and second embodiments of the present invention have been described. However, the specific configuration is not limited to this, and modifications and additions within a range not departing from the gist of the present invention, and other combinations in each claim. It should be understood that this is possible as appropriate.

  In the entrance / exit blocking device of the present invention, the wind speed of the air flowing from the non-smoking room side to the smoking room side at the entrance / exit between the smoking room and the non-smoking room cannot be 0.2 m / sec or more due to insufficient capacity of the exhaust fan. However, in order to further reduce the air conditioning load, if you do not want to take more than 0.2m / sec, make sure that cigarette smoke does not leak from the smoking room side to the non-smoking room side, and open and close the non-smoking room door. However, when it is desired to make it easier, its availability becomes extremely high.

  BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of an entrance / exit blocking device showing an embodiment of the present invention (Example 1).   (Example 1) which is sectional drawing of the air curtain generator with an air cleaner of the entrance-exit block device of FIG.   It is a perspective view similar to FIG. 1 which shows other embodiment of this invention (Example 2).   It is sectional drawing similar to FIG. 1 which shows other embodiment of this invention (Example 2).   It is a characteristic view of the aperture | diaphragm | squeeze dimension which shows the predominance of this invention, and the leakage amount of the dust of the non-smoking room side (Example 1).   It is a characteristic view of the aperture | diaphragm | squeeze dimension which shows the predominance of this invention, and the leakage amount of the dust of the non-smoking room side (Example 1).

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1A Entrance / exit blocking device 2 Indoor 3 Smoking room 4 Non-smoking room 5 Entrance / exit 6 Aperture 7, 7A Air curtain generator 8 Ventilator 9 Inflow air 10, 10A Air curtain 20, 21, 22 Plate 30 Square pipe 30a Installation location 30b Upper part 31 Opening part 32 Wall surface 33 Air passage 33a Inner opening 33b Outer opening 34 Air volume adjustment plate 35 Shaft 40 Air cleaner 41 Airframe 42 Suction port 43 Discharge port 44 Cleaning filter 45, 45A Blower 46 Prefilter 47 Electric dust collector 48 Deodorizing filter L1 Horizontal dimension L2 Distance

Claims (4)

  When the room is divided into a smoking room and a non-smoking room and has an entrance / exit between them, a throttle is provided at the entrance / exit and an air exhaust is provided on the smoking room side, and when the entrance / exit is opened, By generating inflow air from the non-smoking room side to the smoking room side by the exhaust fan, and by rectifying the inflow air by the throttle, even if the flow rate of the inflow air is reduced from 0.2 m / second, An entrance / exit blocking device characterized in that air in the smoking room can be prevented from leaking to the non-smoking room side.   The entrance / exit blocking device according to claim 1, wherein the throttle extends at least 200 mm or more in a horizontal direction of the entrance / exit.   An air curtain generator is provided at the entrance / exit according to claim 1, and the entrance / exit is shut off by an air curtain from the air curtain generator, the inflow air is rectified by the throttle, and the entrance / exit by the air curtain is It is possible to prevent the air in the smoking room from leaking to the non-smoking room side even if the air turbulence is alleviated and the flow rate of the inflow air at the entrance / exit is lowered below 0.2 m / sec. Entry / exit shut-off device.   A doorway shut-off device, wherein the air curtain generator according to claim 3 is added with a function of cleaning air in the smoking room.

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