KR20220142357A - Method using suction force of local air exhauster for individually sucking and adsorbing droplet and aerosol in exhaled breath of singer, wind instrumentalist or speaker - Google Patents

Abstract

The present invention provides a method and an apparatus for reducing loss of pressure to a proper value and lowering noise to a proper value within a local exhaust device that sucks droplets and the like, which can prevent infection from spreading in a more strict and more effective way, even in the case of singing, playing wind instruments, and speaking as infection such as a new coronavirus infection spreads worldwide. Accordingly, provided is the method and the apparatus for forcefully sucking and capturing droplets in the exhaled air of an individual such as a singer and the like at a location where a diffusion range of droplets is small by using power from a suction and local exhaust device consisting of a suction unit (1), a connection unit (2), a noise-reducing means (30), an air blower (4), a capturing unit (5), and an exhaust hole (6).

Description

Method using suction force of local air exhauster for individually sucking and adsorbing droplet and aerosol using the power of a local exhaust device in exhaled breath of singer, wind instrumentalist or speaker}

The present invention utilizes the power of a local exhaust system (hereinafter referred to as "a local exhaust system for suction, such as droplets") consisting of a suction part, a connecting part, a sound damping part, a blower (exhaust fan), a collecting part, and an exhaust part. In order to prevent ingestion of splashes, etc. by persons staying in the same room by singing, blowing, or speaking (hereinafter referred to as "singing, etc."), Before the droplets and aerosols in breathing air (hereinafter referred to as "droplets, etc.") of singers, etc.) spread widely, it relates to a method of forcibly and individually inhaling droplets of singers, etc.

The present invention relates to an apparatus and method for reducing the pressure loss in a suction local exhaust system such as droplet to an appropriate value and reducing noise to an appropriate value.

As a conventional apparatus or method for preventing infection of viruses or the like to people staying in the same room, in Prior Art Document 1 and Prior Art Document 2, a mechanical exhaust or total ventilation of the room performed by opening an opening such as a window , a method of diluting the concentration of 　 droplets in breathing air is disclosed. Patent Document 1 discloses an adhesive mask for effectively collecting droplets and the like in breathing air. Patent Document 2 discloses a partition that blocks movement of droplets and the like in breathing air so as not to reach a person in contact. Patent Document 3 discloses an air curtain that does not reach a face-to-face person by changing the direction of movement of droplets or the like from the vertical direction of the face to another direction.

In the prior art document 3, it is disclosed that it is difficult to implement|achieve the performance of a blower with many air volume, high static pressure, and little noise volume.

In Prior Art Document 4, an appropriate noise level in each case is disclosed.

In the prior art document 5, the pressure loss which occurs in each part of a local exhaust system is shown. In addition, in order to prevent leakage from the source in the hood in the direction of the entrance of the opening of the hood, the control wind speed of the enclosed hood according to the organic solvent poisoning prevention rule, which is the standard of the wind speed required at the opening surface of the suction part, is disclosed in Document 6 of the prior art. have.

In Prior Art Document 7, the minimum value of pressure loss indicating the collection performance of a medical surgical mask, which is a performance criterion of a filter required by the collection unit, is disclosed.

Patent Document 1: Japanese Patent Application Laid-Open No. 2020-7691 Patent Document 2: Japanese Utility Model Application No. 2020-2359 (Utility Model Registration No. 3228491) Patent Document 3: Japanese Utility Model Application No. 2020-2698 (Utility Model Registration No. 3228244)

Prior Art Document 1:　“About the operation of facilities centered on air-conditioning facilities as countermeasures against novel coronavirus infection” (Revised 2nd edition) September 7, 2020 Special Committee on New Coronavirus Countermeasures, Air Conditioning and Sanitation Engineering Society, a public interest corporation Prior Art Document 2: “Regarding restrictions on holding events until the end of November, etc.” Cabinet Secretariat Novel Coronavirus Infectious Disease 　 Countermeasures Promotion Office Office Liaison Sept. 11, 2020 (September 11, 2020) Prior art document 3:　“Basics of subdued ventilation” Beginner 2 dl.mitsubishielectric.co.jp Prior Art Document 4: Environmental Standards for Noise in the Environmental Standards Act Prior Art Document 5: “Easy Local Design Classroom” Masashi Numasawa Prior art document 6: Organic solvent poisoning prevention rules Prior art document 7: 　 Japan Nonwovens Association "Voluntary Standard on Filters for Masks" 　 American Association for Testing and Practice ASTM F2100-02 Prior Art Document 8: “An analysis of the protective effect of masks such as Mt. Tomidake, karaoke and izakaya” (Katsuyuki Ogawara, October 14, 2020 06:10) 　https://pc.watch.impress.co.jp/docs /news/1282701.html

In the past, in order to prevent the spread of infection, it has been practiced to avoid 3 mils (closed, dense, close), and to ventilate or wear a mask. Prior to the global spread of the infection, the infection was controlled by previous methods. However, in the case of singing under the global spread of infection such as the new corona virus, a more rigorous and effective method of preventing the spread of infection is required. As disclosed in Prior Art Document 8, the scattering range of droplets in individual breathing air increases with the scattering distance. The problem to be solved by the present invention is, as disclosed in Prior Art Documents 1 and 2, in breathing air as a method by mechanical exhaust or full room ventilation performed by opening an opening such as a window. The droplets of air diffuse in the downstream direction of the air flow, and there is a possibility that people in the downstream direction in the same room may ingest it. Moreover, since the total ventilation exhausts air from places other than the generation source as well, the size of the facility increases, and the facility cost and maintenance cost increase.

The problem to be solved by the present invention is that there is a possibility that leaks such as droplets may occur due to gaps depending on the wearing state, even when wearing a close-fitting mask. Partitions or air curtains block or change the direction of movement of droplets, so that ingestion of droplets, etc. can be prevented, but droplets spread in other directions, and the possibility of re-diffusion of droplets, etc. once adhered Therefore, there is a possibility that people other than the face-to-face person staying in the same room may ingest it.

The problem to be solved by the present invention is that, when a mask, a partition, or an air curtain is used, the sound pressure of singing or the like decreases, making it difficult to discriminate from the sound pressure of the surrounding noise, making it difficult to hear.

As disclosed in Prior Art Document 5, pressure loss occurs due to air movement in the local exhaust system for suction such as droplets, and in particular, in order to collect droplets and the like in the collecting unit, a pressure loss of 39.2 Pascal or more presented in Prior Art Document 7 You need to use a filter of values. In addition, depending on the shape or mounting condition of the suction unit, turbulence generated within the suction local exhaust device such as droplets moves in the opposite direction to the suction, possibly causing leakage at the suction unit inlet. And in order to suction and collect droplets, etc., in order to move air in a suction local exhaust apparatus, such as a droplet, the static pressure of an exhaust port needs to be atmospheric pressure or more. Furthermore, as disclosed in Prior Art Document 3, in general, a blower having a large static pressure or a large power that can increase the air volume also has a large noise and sound pressure, so when noise reduction is also to be realized at the same time, the blower that can be used There is a limit to static pressure or air volume. The problem to be solved by the present invention is that, under these conditions, it is necessary to realize a certain or more wind speed at the opening of the suction unit for sucking and collecting droplets etc. generated in the suction local exhaust system without leaking in the opposite direction to the suction. have.

By using the power of the suction local exhaust system, such as droplets composed of the suction unit 1, the connecting unit 2, the decompression unit 3, the blower 4, the collector 5, and the exhaust port 6, At a position where the diffusion range is small, droplets in the breathing air of individuals such as singers are forcibly sucked and collected.

The ratio of the filter area of the collecting part is adjusted appropriately.

The filter type is a medical surgical non-woven filter disclosed in Prior Art Document 7.

The shape of the suction part is an elliptical bottom cone shape with the major axis of the base from the chin to the eyes and nose, and the minor axis being a point greater than or equal to the face width.

A contact signal contact is provided in two places on the part in contact with the chin and nose of the suction part, and an alarm signal is transmitted.

In order to reduce the volume of the local exhaust system for suction, such as droplets, and to increase the area for absorbing negative energy, the damping part is formed in a corridor type. And, for sound damping, an energy absorbing material and a sound insulating material that does not cause coincidence are used together.

The exhaust port of the exhaust unit 6 is the outer surface of the filter.

By forcibly and individually suctioning using power at a location including a source with a small divergent diffusion range, it is possible to effectively aspirate droplets, etc. Therefore, it is possible to reduce the fear of ingestion of droplets or the like during actual singing such as singing or chorus in a karaoke room used by a plurality of people.

By using a suction local exhaust device such as droplet that sucks air including droplets in a limited area compared to total ventilation, equipment and maintenance costs can be lower than that of total ventilation. Therefore, it is possible to effectively collect droplets, etc. even in a small facility where full ventilation is not performed sufficiently, and even in a large facility where total ventilation is performed, it is possible to reduce the cost of overall ventilation by using it in combination with a suction local exhaust system such as droplet.

Adjust the ratio of the filter area of the collection unit to an appropriate ratio, reduce the air resistance by making the suction unit conical in shape, and reduce the pressure loss in the suction local exhaust system such as droplets by creating a gap between the face and the suction unit due to the shape of the suction unit can be reduced

When the filter type is a medical surgical nonwoven filter, large particles such as droplets can be collected, and viruses adhering thereto can be collected.

Since the shape of the bottom surface of the cone of the suction unit can cover the nose and mouth that emit droplets or the like, the local exhaust suction device such as droplet can be used as the enveloping hood presented in Prior Art Document 5.

By reducing the pressure loss in the suction local exhaust device such as droplet, the wind speed at the opening of the suction unit can be increased, so that it is possible to exceed the control wind speed of the enveloping hood requirements disclosed in Prior Art Documents 5 and 6.

Since the conical shape of the suction portion can reduce the turbulence of air in the suction portion, it is possible to constantly suck the droplets and the like in the suction portion, so that there is no part where the droplet or the like remains.

By the contact signal from the portion in contact with the chin and nose of the suction unit, it can be confirmed whether the suction unit is mounted so that the nose and mouth are wrapped in the suction unit.

The sound pressure of the blower noise in the suction part that propagates through the space in the suction local exhaust system such as droplets can be lower than 55 dB, which is the minimum environmental standard for noise disclosed in Prior Art Document 4, and local exhaust by suction such as droplets Because the noise around the device can be made to 55 dB or less, the noise does not interfere with singing. Since the shape of the suction portion can create a gap between the face and the suction portion, it is possible to reduce a decrease in volume such as vocalization.

By integrating the exhaust port with the suction local exhaust device such as droplet, there is no need to install an exhaust duct, and it is possible to prevent an increase in the size of the equipment and the equipment cost and maintenance cost.

1 is a block diagram of an embodiment of the present invention.
Fig. 2 shows a suction unit in the configuration diagram of an embodiment of the present invention.
3 is a cross-sectional view of a sound winding unit in the configuration diagram of an embodiment of the present invention.
4 shows a collecting unit and an exhaust unit in the configuration diagram of an embodiment of the present invention.

1 is a block diagram of an embodiment of the present invention.

The suction local exhaust device for droplets or the like of the present invention is composed of a suction unit 1, a connection unit 2, a sound damper 3, a blower 4, a collection unit 5, and an exhaust unit 6, and the singer It is possible to forcibly and individually aspirate and collect droplets, etc., by using the power of a local exhaust system.

2 shows the suction part 1 and the connection part 2 in the block diagram of one Embodiment of this invention.

As for the suction unit 1 of the present invention, it is optimal to use the suction unit as an enveloping hood, but when there is little turbulence outside the hood and the control wind speed at the collecting point is satisfied, prior art document 5 and prior art document It is also possible to use it as an external hood as described in 6 .

The suction part 1 of the present invention has an optimal shape of an elliptical cone on the bottom, but it can be wrapped around the nose and mouth, has a gap between the face and has a shape with low air resistance. In addition, although a transparent material is suitable, if the sound damping effect is small, a colored material is also acceptable. It is optimal to set the contact signal contact point in two places on the suction part 1, the part in contact with the chin and the nose of the suction part, but if it can be confirmed that the suction part is mounted so that the nose and mouth are wrapped in the suction part, The contact location or the number of contact points may be different from those described above. The microphone installation hole is always closed, but when using the microphone, open it and install the microphone. The quantity of the suction part 1 and the connection part 2 may be plural, if the suction air volume in a suction part can be enlarged.

3 is a cross-sectional view of the sound winding unit 3 in the configuration diagram of an embodiment of the present invention.

For the sound damping unit 3 of the present invention, it is optimal to wrap the blower 4 and the corridor in three layers with a casing material, a sound absorbing material and a sound insulating material, but the noise of 55 dB or less in the vicinity of the suction unit 1 and the suction local exhaust device such as droplets If sound pressure can be realized, it does not need to be three layers. In addition, although one layer is optimal for a corridor, if it is to implement|achieve a noise sound pressure of 55 dB or less around the suction part 1 and a suction local exhaust system, such as a droplet, it may not be a single layer.

4 : shows the collection part 5 and the exhaust part 6 in the block diagram of one Embodiment of this invention.

It is optimal to comprise the collecting part 5 of this invention with a filter part and a casing part. The case of increasing the ratio of the filter part is made by replacing the casing part with the filter part. Although a medical surgical nonwoven fabric mask is optimal as a filter type, a collection material or apparatus, such as a filter whose collection performance is equal or more, can be used. The exhaust port of the exhaust unit 6 is optimally formed on the outer surface of the filter in order to prevent the enlargement of the facility and increase in facility cost and maintenance cost by installing the exhaust duct, but the exhaust port is separately installed indoors, or the exhaust duct It is also free to install outdoors.

(1) suction part (2) connection part
(3) damping unit (4) blower
(5) collection unit (6) exhaust port
(The suction unit 1 collects air including droplets, etc., transports it to the connection unit 2, winds it up at the damping unit 3, and the blower 4 gives energy to the air containing droplets, etc., The collection unit (5) collects droplets, etc., and exhausts the air through the exhaust port (6).

Claims (1)

In order to prevent ingestion of droplets, etc. by a person staying in the same room as the singer, by the suction unit of the local exhaust system for suctioning droplets, etc., at a location where the diffusion and diffusion range of droplets, etc. is small, the singer's droplets, etc. are forcibly and individually How to aspirate and collect.

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