JP2020143878A - Local air conditioning booth - Google Patents

Abstract

To provide a local air conditioning booth capable of effectively reducing noise in an air supply duct connected to an air conditioner.SOLUTION: An air conditioner 12 is configured to blow out air from a top surface blow-out port 14 provided on a top surface. A supply chamber 13 is configured to introduce the air blown out by the air conditioner 12 from a top surface introduction port 15 provided on the top surface and to supply the air to an internal space through a side surface blow-out port 18 installed toward an internal space of a booth body. The top surface blow-out port 14 and the top surface introduction port 15 are communicated via an air supply duct 20. In the air supply duct 20, a cross-sectional shape of a ventilation passage is formed into a rectangle by a combination of plate-like members and to extend in a horizontal direction from right above the top surface blow-out port 14 and the top surface introduction port 15 via a ceiling surface of the booth body. Moreover, there is provided a blow-out side sound absorption member 40 for a part bypassing at least the ceiling surface.SELECTED DRAWING: Figure 2

Description

The present invention provides a booth body that separates the external space from the internal space, an air conditioner that blows air to supply the internal space, and a supply chamber that supplies air blown from the air conditioner to the internal space. Regarding the equipped local air conditioning booth.

In production equipment that requires high precision and high stability, when air conditioning the entire space where various devices are placed, it is suitable for the device that requires the highest precision and stability among the various devices. Since air conditioning equipment is required, capital investment will be enormous. Therefore, in order to avoid excessive capital investment for overall air conditioning, a local air conditioning booth is used to locally secure precision and stability according to the required precision and stability.

Even in such a local air conditioning booth, for example, an air conditioner that supplies a predetermined amount of air adjusted to an appropriate temperature and humidity is provided according to the precision and stability. The air conditioner and the local air conditioning booth The booth body is connected to the booth body by a flexible air supply duct, for example, a flexible duct, after being installed individually.

As an example of such a flexible duct, Patent Document 1 describes a cloth bag-shaped duct that can imitate the shape of the wall surface on which the duct is constructed for the purpose of easily realizing it in the field of a work space. Is disclosed.

By the way, since the air conditioner has a noise source such as a blower, this noise is propagated to the internal space of the booth body of the local air conditioning booth. In addition, since the flexible duct has a bellows structure, its inner surface is not smooth, so noise due to airflow is likely to occur, and pressure loss is large. Since the sound insulation of the duct wall itself of the flexible duct is low, noise in the external space of the flexible duct is likely to be propagated into the flexible duct through the duct wall.

These noises may adversely affect the devices installed in the internal space of the booth body. Therefore, it is conceivable to introduce a silencer that reduces noise. However, it is necessary to secure a space for installing a muffler between the air conditioner and the local air conditioning booth, connect the muffler to a flexible duct, and fix the muffler. It becomes complicated.

Japanese Unexamined Patent Publication No. 2013-50250

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a local air conditioning booth capable of effectively reducing noise in an air supply duct connected to an air conditioner.

The characteristic configuration of the local air conditioner booth according to the present invention for achieving the above object is a booth body that separates the external space from the internal space, an air conditioner that blows air to supply the internal space, and the air conditioner. A local air conditioner booth provided with a supply chamber for supplying air blown from the machine to the internal space, wherein the air conditioner and the supply chamber face the side surfaces of the booth body from the same direction and The air conditioners are arranged close to each other, and the air conditioners are configured to blow out air from a top surface outlet provided on the top surface, and the supply chamber is provided from a top surface introduction port provided on the top surface. , The air blown out by the air conditioner is introduced, and the air is supplied to the internal space from a side outlet provided toward the internal space of the booth main body. The air supply duct is communicated with the surface introduction port via an air supply duct, and the air supply duct has a rectangular cross-sectional shape of a ventilation path by a combination of flat plate-shaped members, and the top surface outlet and the top surface introduction port. It is configured to extend horizontally from directly above the booth body and pass over the ceiling surface of the booth body, and further, at least a portion passing over the ceiling surface is provided with a sound absorbing member on the outlet side.

According to the above configuration, since the air conditioner and the supply chamber face each other from the same direction with respect to the side surface of the booth body and are arranged close to each other, the space for installing the air conditioner and the supply chamber is wide. There is no need to secure it. Since the air supply duct has a rectangular cross-sectional shape of the ventilation path by combining flat plate members, it is compared with the flexible duct that has been conventionally used for connecting the air conditioner and the booth body in the local air conditioning booth. Since the inner surface is smooth, noise due to air flow is less likely to occur, and pressure loss is small. The term "booth" according to the present invention can be read as a room, a chamber, or the like.

The noise propagated from the top air outlet of the air conditioner is provided there when the air blown from the top air outlet of the air conditioner passes through the part of the air supply duct that passes over the ceiling surface of the booth body. It is reduced by the blowout side sound absorbing member. At that time, the air supply duct is not connected from the top surface outlet to the top surface introduction port at the shortest distance, but goes through the ceiling surface of the booth body from the top surface outlet to the top surface introduction port. Since the route is secured for a long time, the effect of reducing noise is higher. When securing the supply duct for a long time, it is not necessary to secure a separate space for installing the supply duct because it is used on the ceiling surface of the booth body.

In addition, in the conventional configuration in which a silencer is provided in addition to the flexible duct, a method of securing a space for installing the silencer, connecting the silencer to the flexible duct, and fixing the silencer is considered. I needed it. However, if the air supply duct is provided with a sound absorbing member on the outlet side on the inner surface, the sound absorbing member on the outlet side is provided on the inner surface of the air supply duct, so it is necessary to provide a silencer separately from the air supply duct. Therefore, the above problem can be avoided and the construction period can be shortened.

In the present invention, it is preferable that the blowout side sound absorbing member is provided on the left side surface and the right side surface of the inner surface of the air supply duct in the ventilation direction view.

According to the above configuration, since the blowout side sound absorbing member is provided on the left side surface and the right side surface of the air supply duct in the ventilation direction view, the air flowing in the air supply duct extending in the horizontal direction is prevented from flowing. In particular, the sound is effectively absorbed by the blowout side sound absorbing member arranged on the left side surface or the right side surface at the portion where the path of the air supply duct bends.

In the present invention, it is preferable that the blowout side sound absorbing member is provided on the top surface of the inner surface of the air supply duct.

According to the above configuration, since the blowout side sound absorbing member is provided on the top surface of the inner surface of the air supply duct, the air blown upward from the top surface outlet of the air conditioner is along the air supply duct. When it bends in the horizontal direction, it is absorbed by the sound absorbing member on the outlet side.

In the present invention, it is preferable that the blowout side sound absorbing member is also provided on the bottom surface of the inner surface of the air supply duct other than the portion communicating with the top surface outlet and the top surface introduction port.

According to the above configuration, since the blowout side sound absorbing member is also provided on the bottom surface of the inner surface of the air supply duct other than the portion communicating with the top surface outlet and the top surface introduction port, sound absorption is also provided on the bottom surface. Will be done.

In the present invention, it is preferable that the supply chamber includes a filter that captures foreign matter contained in the air blown out by the air conditioner.

According to the above configuration, the filter can capture foreign matter contained in the air blown out by the air conditioner, so that clean air can be supplied to the internal space of the booth body.

In the present invention, it is preferable that a return air duct is provided that communicates the suction port for sucking air in the internal space with the side introduction port provided on the side surface of the air conditioner.

According to the above configuration, the air whose temperature and humidity have been adjusted by the air conditioner can be collected by the return air duct and supplied to the booth body again, so that the temperature and humidity of the air taken in from the external space of the booth body can be adjusted at all times. The running cost can be reduced as compared with the configuration.

In the present invention, the return air duct communicates with an upward duct having the return air suction port near the bottom surface of the internal space and the upward duct, and is arranged sideways on the ceiling surface of the booth body. It is preferable to have a duct and a downward duct communicating the sideways duct and the side surface introduction port.

If the horizontal duct is placed in the internal space of the booth body, direct noise propagation and direct heat exchange will occur due to the horizontal duct, which will adversely affect the equipment installed in the internal space of the booth body. There is a risk of exerting it.

On the other hand, according to the above configuration, by arranging the horizontal duct on the ceiling surface of the booth body, direct noise propagation and direct heat exchange by the horizontal duct do not occur. Such adverse effects can be avoided.

Since the upward duct has a suction port near the bottom surface, the airflow toward the suction port is downward, so that there is little risk of dust falling toward the bottom surface of the internal space of the booth body due to gravity.

The downward duct can guide the air flowing through the upward duct and the lateral duct to the side suction port of the air conditioner.

In the present invention, it is preferable that the lateral duct is provided with a suction-side sound absorbing member on the inner surface on the downstream side in the ventilation direction.

According to the above configuration, since the suction side sound absorbing member is provided on the inner surface of the lateral duct on the downstream side in the ventilation direction, the air conditioner located on the downstream side in the ventilation direction of the lateral duct is upstream inside the lateral duct. The noise propagated toward the side can be effectively absorbed.

In the present invention, it is preferable that the suction side sound absorbing member is provided on at least the left side surface and the right side surface of the sideways duct, or the top surface and the bottom surface thereof in the ventilation direction view.

According to the above configuration, since the suction side sound absorbing member is provided on at least the left side surface and the right side surface of the sideways duct in the ventilation direction view, or the top surface and the bottom surface thereof, it is oriented sideways from the air conditioner. The noise propagated toward the upstream side inside the duct can be absorbed more effectively.

In the present invention, it is preferable that the flat plate-shaped member is composed of an outer surface plate, an inner surface plate, and a heat insulating layer provided between the outer surface plate and the inner surface plate.

Since the flat plate-shaped member constituting the air supply duct and the return air duct is provided with a heat insulating layer, the temperature and noise of the external space of the booth body are transmitted to the booth body through the air supply duct and the return air duct. The effect of heat transfer and propagation to the internal space is reduced.

Explanatory drawing of local air conditioning booth according to this invention Explanatory drawing of the air supply duct provided in the local air conditioning booth Explanatory drawing of the return air duct provided in the local air conditioning booth Top view of local air conditioning booth FIG. 6 is a view taken along the line CC. AA line arrow view in FIG. BB line arrow view in FIG. Detailed view of the air supply duct D-D line arrow view in FIG. EE line arrow view in FIG. A detailed view of the air supply duct according to another embodiment corresponding to the arrow view taken along the line DD in FIG. A detailed view of the air supply duct according to another embodiment corresponding to the arrow view taken along the line EE in FIG. A detailed view of the air supply duct according to another embodiment corresponding to the arrow view taken along the line DD in FIG. A detailed view of the air supply duct according to another embodiment corresponding to the arrow view taken along the line EE in FIG. Top view of the local air conditioning booth according to another embodiment Top view of air supply duct and return air duct according to another embodiment

Hereinafter, embodiments of the local air conditioning booth according to the present invention will be described with reference to the drawings.

FIG. 1 shows a local air conditioning booth 10 in a production facility that requires highly precise and highly stable air conditioning.

The local air conditioning booth 10 has a booth main body 11 that separates the external space from the internal space, an air conditioner 12 that blows out air to be supplied to the internal space of the booth main body 11, and an internal space that blows out air from the air conditioner 12. A supply chamber 13 is provided.

The booth main body 11 is composed of a housing that separates the external space from the internal space, and various devices that require high-precision and highly stable air conditioning are installed in the internal space of the housing.

As shown in FIGS. 1 and 4, the air conditioner 12 is installed in an installation space provided in one of the four corners of the booth main body 11. The supply chamber 13 is installed so as to be adjacent to the air conditioner 12. The air conditioner 12 and the supply chamber 13 are arranged so that the surfaces on the side of the booth main body 11 are flush with each other.

As shown in FIGS. 1, 2 and 4 to 7, a top air outlet 14 provided on the top surface of the housing of the air conditioner 12 and a ceiling provided on the top surface of the housing of the supply chamber 13. The surface introduction port 15 is communicated with the air supply duct 20.

As shown in FIGS. 1, 3 to 7, a return air duct 30 for returning air in the internal space of the booth body 11 is provided at the side suction port 16 provided below the side surface of the housing of the air conditioner 12. The return air port 38 is connected.

The air conditioner 12 is provided with a blower inside the housing, and is configured to blow out the air sucked from the side suction port 16 provided below the side surface of the housing from the top air outlet 14 by driving the blower. Has been done. At that time, the air conditioner 12 is configured so that the temperature and humidity are adjusted and a predetermined amount of air is blown out according to the conditions required for the internal space of the booth main body 11.

The supply chamber 13 introduces the air blown out by the air conditioner 12 into the housing from the top surface introduction port 15, captures foreign matter contained in the air by the filter 17 provided inside the housing, and then captures the foreign matter contained in the air. It is configured to blow out into the internal space of the booth main body 11 from the side air outlet 18 provided on the side surface of the housing.

As shown in FIGS. 2 and 5, the air supply duct 20 extends from directly above the top air outlet 14 toward the booth main body 11 in the same horizontal plane, and bends at a right angle from there to be viewed from the air conditioner 12. It is configured to extend in the direction of the supply chamber 13 and then bend at a right angle again to extend directly above the top surface introduction port 15 of the supply chamber 13. That is, the air supply duct 20 is configured to have a U-shape in a plan view, extends horizontally from directly above the top surface outlet 14 and the top surface introduction port 15, and passes through the ceiling surface of the booth body 11. Has been done.

When the projected shape of the air conditioner 12 with respect to the installation space of the air conditioner 12 is rectangular, the air conditioner 12 is provided so that the lateral direction thereof is parallel to the booth main body 11. As a result, since the longitudinal direction of the air conditioner 12 faces the booth main body 11, the distance from directly above the top air outlet 14 to the booth main body 11 can be increased, and the air outlet side sound absorbing member described later can be increased accordingly. Many 40 can be provided.

As shown in FIGS. 1, 3, 4 to 7, in the internal space of the booth main body 11, the corner of the side surface farthest from the side surface facing the air conditioner 12 and the most far from the side surface facing the air conditioner 12 Four vertical upward ducts 31 are provided between the distant side surface.

Each upward duct 31 has a return air suction port 32 for sucking air in the internal space at the lower end near the bottom surface of the internal space of the booth main body 11. That is, "upward" means that the ventilation direction is upward.

On the ceiling surface of the booth main body 11, a pair of merging ducts 33 parallel to each of the pair of side surfaces connected to the side surfaces facing the air conditioner 12 and in a horizontal posture are provided.

Each of the merging ducts 33 includes two upward ducts 31 out of four upward ducts 31, specifically, an upward duct 31 provided at the corner of the side surface farthest from the side surface facing the air conditioner 12. The air conditioner 12 is communicated with an upward duct 31 provided between the side surface facing the air conditioner 12 and the side surface farthest from the side surface facing the air conditioner 12.

Each of the merging ducts 33 communicates with a collecting duct 34 arranged in a horizontal position parallel to the side surface on the side surface side of the ceiling surface of the booth main body 11 facing the air conditioner 12.

Each of the merging duct 33 and the collecting duct 34 constitutes a sideways duct 35 arranged on the ceiling surface of the booth main body 11. In addition, "horizontal" means that the ventilation direction is horizontal.

The downward duct 36 extends horizontally in the direction of the air conditioner 12 from directly below the communication hole 37 provided on the lower surface of the collective duct 34 among the lateral ducts 35, and bends downward at a right angle on the side surface facing the air conditioner 12. The return air port 38 communicates with the side suction port 16 of the air conditioner 12.

That is, the return air duct 30 is composed of an upward duct 31, a lateral duct 35, and a downward duct 36. It is preferable that the upward duct 31, the merging duct 33, the collecting duct 34, and the downward duct 36 have a larger cross section toward the downstream side from the viewpoint of preventing an increase in pressure loss.

The air supply duct 20 and the return air duct 30 are formed by appropriately combining a flat plate-like member composed of an outer surface plate, an inner surface plate, and a heat insulating layer provided between the outer surface plate and the inner surface plate, thereby forming a ventilation path. It is configured so that the cross-sectional shape is rectangular. The outer surface plate and the inner surface plate are made of a metal plate such as stainless steel. The heat insulating layer may be composed of a foam-based member in which gas is finely dispersed in a synthetic resin, rubber, elastomer or the like and molded into a foam-like or porous shape, or may be composed of a fiber-based member such as glass wool. It may be configured.

At least the surface of the inner surface plate that becomes the contact surface with the air to be ventilated is formed smoothly, and the air supply duct 20 and the return air duct 30 are designed to reduce the air ventilation resistance.

As shown in FIGS. 2, 3 and 5, each of the air supply duct 20 and the return air duct 30 is provided with sound absorbing members (outlet side sound absorbing member 40, suction side sound absorbing member 41) on the inner surfaces thereof. The sound absorbing member may be a foam-based member obtained by finely dispersing gas in a synthetic resin, rubber, elastomer or the like and molded into a foamy or porous shape, or a fiber-based member such as glass wool. You may.

As shown in FIGS. 8 to 10, in the air supply duct 20, the blowout side sound absorbing member 40 is provided on the left side surface 20L and the right side surface 20R of the inner surface of the air supply duct 20 in the ventilation direction view. ..

The noise propagated from the top air outlet 14 of the air conditioner 12 passes through the portion of the air supply duct 20 where the air blown from the top air outlet 14 of the air conditioner 12 passes over the ceiling surface of the booth body 11. At that time, it is reduced by the blowout side sound absorbing member 40 provided there.

Since the blowout side sound absorbing member 40 is provided on the left side surface 20L and the right side surface 20R in the ventilation direction view of the inner surface of the air supply duct 20, the air flowing in the air supply duct 20 extending in the horizontal direction can be collected. In particular, at the portion where the path of the air supply duct 20 bends, sound is effectively absorbed by the blowout side sound absorbing member 40 arranged on the left side surface 20L to the right side surface 20R.

As shown in FIGS. 3 and 5, the return air duct 30 has a suction side sound absorbing member on the left side surface 30L and the right side surface 30R of the lateral duct 35 on the downstream side in the ventilation direction in the ventilation direction. 41 is provided.

Since the suction side sound absorbing member 41 is provided on the inner surface of the lateral duct 35 on the downstream side in the ventilation direction, the air conditioner 12 located on the downstream side in the ventilation direction of the lateral duct 35 is located on the upstream side inside the lateral duct 35. It is possible to effectively absorb the noise propagated toward.

In the above-described embodiment, the configuration in which the blowout side sound absorbing member 40 is provided on the left side surface 20L and the right side surface 20R of the inner surface of the air supply duct 20 in the ventilation direction is described, but the present invention is not limited to this. ..

For example, as shown in FIGS. 11 and 12, the blowout side sound absorbing member 40 may be provided on the top surface 20T of the inner surface of the air supply duct 20, and the blowout side sound absorbing member 40 may be provided. Of the inner surface of the air duct 20, it may be provided on the bottom surface 20B other than the portion communicating with the top surface outlet 14 and the top surface introduction port 15. As shown in FIGS. 13 and 14, the blowout side sound absorbing member 40 is not provided on the bottom surface 20B of the inner surface of the air supply duct 20 other than the portion communicating with the top surface outlet 14 and the top surface introduction port 15. In this case, the thickness of the blowout side sound absorbing member 40 provided on the top surface 20T may be increased as compared with the examples shown in FIGS. 11 and 12.

In the above-described embodiment, the structure in which the suction side sound absorbing member 41 is provided on the left side surface 30L and the right side surface 30R in the ventilation direction view of the inner surface on the downstream side in the ventilation direction of the lateral duct 35 will be described. However, it is not limited to this.

For example, the suction side sound absorbing member 41 is the left side surface 30L and the right side surface of the lateral duct 35 constituting the return air duct 30, specifically, the inner surface of the collecting duct 34 on the downstream side in the ventilation direction. In addition to or in place of 30R, it may be provided on the top surface and the bottom surface.

In the above-described embodiment, the configuration in which the air conditioner 12 is installed in the installation space provided in one of the four corners of the booth main body 11 has been described, but the present invention is not limited to this. As shown in FIG. 15, the air conditioner 12 may be installed in an installation space provided outside one of the four corners of the booth main body 11. In this case, as shown in FIG. 16, the air supply duct 20 is formed in an L shape in a plan view.

The above-described embodiments are all examples of the present invention, and the description does not limit the present invention, and the specific configuration of each part can be appropriately modified and designed within the range in which the effects of the present invention are exhibited. is there.

10: Local air conditioning booth 11: Booth body 12: Air conditioner 13: Supply chamber 14: Top surface outlet 15: Top surface introduction port 16: Side suction port 17: Filter 18: Side outlet 20: Air supply duct 20B: Bottom surface 20L: Left side 20R: Right side 20T: Top surface 30: Return air duct 30L: Left side 30R: Right side 31: Upward duct 32: Return air suction port 33: Confluence duct 34: Collective duct 35: Sideways duct 36: Downward Duct 37: Communication hole 38: Return air port 40: Outlet side sound absorbing member 41: Suction side sound absorbing member

Claims (10)

Local air conditioning equipped with a booth body that separates the external space from the internal space, an air conditioner that blows air to supply the internal space, and a supply chamber that supplies air blown from the air conditioner to the internal space. It ’s a booth
The air conditioner and the supply chamber face each other from the same direction with respect to the side surface of the booth body, and are arranged at positions close to each other.
The air conditioner is configured to blow out air from a top air outlet provided on the top surface of the air conditioner.
The supply chamber introduces the air blown out by the air conditioner from the top surface introduction port provided on the top surface thereof, and the air is directed into the internal space of the booth body from the side outlet provided inside the booth body. Configured to supply space
The top surface outlet and the top surface introduction port are communicated with each other via an air supply duct.
The air supply duct has a rectangular cross-sectional shape of the air passage by combining flat member members, and extends horizontally from directly above the top air outlet and the top introduction port to the ceiling surface of the booth body. A local air-conditioning booth that is configured to pass through the top and is further provided with a sound absorbing member on the blowing side at least in a portion that passes over the ceiling surface. The local air conditioning booth according to claim 1, wherein the blowout side sound absorbing member is provided on the left side surface and the right side surface of the inner surface of the air supply duct in the ventilation direction view. The local air conditioning booth according to claim 1 or 2, wherein the blowout side sound absorbing member is provided on the top surface of the inner surface of the air supply duct. The local air conditioning booth according to claim 3, wherein the blowout side sound absorbing member is also provided on the bottom surface of the inner surface of the air supply duct other than the portion communicating with the top surface outlet and the top surface introduction port. The local air conditioning booth according to any one of claims 1 to 4, wherein the supply chamber includes a filter for capturing foreign matter contained in the air blown out by the air conditioner. The local air conditioner according to any one of claims 1 to 5, wherein a return air duct for communicating the return air suction port for sucking air in the internal space and the side surface introduction port provided on the side surface of the air conditioner is provided. booth. The return air duct has a rectangular cross-sectional shape of the air passage by a combination of flat plate members, and is communicated with the upward duct having the return air suction port near the bottom surface of the internal space. The local air-conditioning booth according to claim 6, further comprising a lateral duct arranged on the ceiling surface of the booth body and a downward duct communicating the lateral duct with the side surface introduction port. The local air conditioning booth according to claim 6 or 7, wherein the lateral duct is provided with a suction side sound absorbing member on an inner surface on the downstream side in the ventilation direction. The local air conditioning booth according to claim 8, wherein the suction side sound absorbing member is provided on at least the left side surface and the right side surface, or the top surface and the bottom surface thereof in the ventilation direction view of the inner surface of the lateral duct. The local area according to any one of claims 1 to 9, wherein the flat plate-shaped member is composed of an outer surface plate, an inner surface plate, and a heat insulating layer provided between the outer surface plate and the inner surface plate. Air conditioning booth.

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