JP7494118B2 - Booth and ejection device - Google Patents

Description

The present invention relates to a booth and an ejection device.

There are known booths for assembling electronic and precision parts, performing various tasks such as experiments, operating process equipment and precision machinery, etc. In such booths, the interior space is isolated from the exterior space by partition members (walls, ceilings, etc.), and environmental conditions such as temperature, humidity, and cleanliness are maintained.

JP 2014-169816 A

In a booth, an entrance/exit is necessary to allow access to the internal space for workers to enter and exit and for carrying in and out items. Providing a structure such as a door, sliding door, or curtain at the entrance/exit makes access difficult and reduces workability. Therefore, it is possible to make the entrance/exit a simple opening without providing such a structure. In this case, however, the barrier against the outside space is insufficient, making it difficult to control the air conditioning in the internal space, such as temperature control and humidity control. In addition, there is a risk that dust will enter the internal space through the opening, lowering the cleanliness of the internal space. Thus, if the entrance/exit of the booth is a simple opening, various environmental conditions (temperature, humidity, cleanliness, etc.) will deteriorate.

One aspect of the present invention aims to create a booth that allows easy access to the interior space without degrading environmental conditions.

In order to solve the above problems, a booth according to one embodiment of the present invention has an air outlet that ejects air into an opening that leads to an internal space separated from an external space, and the air outlet is configured to form a first airflow that prevents disturbances from the external space from being introduced into the internal space, and a second airflow that is located inside the first airflow and prevents the first airflow from being introduced into the internal space.

According to one aspect of the present invention, a booth can be realized that allows easy access to the interior space without degrading environmental conditions.

1 is a schematic configuration diagram showing a booth according to a first embodiment of the present invention. 1 is a schematic vertical cross-sectional view showing a booth according to a first embodiment of the present invention. FIG. 1 is a schematic configuration diagram showing a jetting device according to a first embodiment of the present invention. 1 is a horizontal cross-sectional schematic diagram showing a booth according to a first embodiment of the present invention. FIG. FIG. 4 is a horizontal cross-sectional schematic diagram showing a booth according to a second embodiment of the present invention. FIG. 11 is a vertical cross-sectional view showing a booth according to a third embodiment of the present invention. FIG. 11 is a vertical cross-sectional schematic diagram showing a booth according to a fourth embodiment of the present invention. FIG. 11 is a vertical cross-sectional schematic diagram showing a booth according to a fifth embodiment of the present invention. FIG. 13 is a front view of a booth according to a sixth embodiment of the present invention. FIG. 13 is a front view of a booth according to a seventh embodiment of the present invention. FIG. 13 is a front view of a booth according to an eighth embodiment of the present invention. FIG. 13 is a front view of a booth according to embodiment 9 of the present invention. 13 is a result of a simulation regarding temperature distribution in the booth of the present invention. 13 is a result of a simulation regarding temperature distribution in the booth of the present invention. 13 is a result of a simulation regarding temperature distribution in the booth of the present invention.

[Embodiment 1]
Hereinafter, one embodiment of the present invention will be described in detail.

(Overall booth layout)
Fig. 1 is a diagram showing a schematic configuration of a booth 10 according to the first embodiment. Fig. 2 is a diagram showing a vertical cross section of the booth 10 as viewed from the side. The booth 10 has an internal space S separated from an external space by a ceiling portion 101, two side wall portions 102, a front wall portion 103, and a rear wall portion 104, which are partition members assembled on a floor 90 (not included in the components of the booth 10). The size of the internal space S is not limited to a specific value, but may be, for example, about 3 to 20 m in the depth direction, 3 to 20 m in the width direction, and 2 to 5 m in the height direction.

An opening 105 is provided near the center of a portion of the front wall 103, forming an entrance/exit to the internal space S. The size of the opening 105 is not limited to a specific value, but can be, for example, smaller than the width of the internal space S, 1 to 3 m in the width direction, and smaller than the height of the internal space S, 2 to 5 m in the height direction.

The booth 10 also has an air conditioning device (air conditioning section) 150 outside the internal space S, which controls the air conditioning of the internal space S. The internal space S is an area for performing tasks and machine operations in an air-conditioned environment, such as assembling electronic and precision components, performing various tasks such as experiments, and operating process equipment and precision machinery. In embodiment 1, the air conditioning control is specifically temperature control. However, the air conditioning control is not limited to temperature control, and may also be, for example, humidity control or cleanliness control.

The partition members (ceiling 101, side walls 102, front wall 103, rear wall 104) may be made of any suitable known material that is used as a wall or ceiling material for a booth, such as vinyl curtains, heat-insulating non-combustible panels, glass, acrylic panels, metal panels, etc. In order to maintain structural strength, it is preferable that the partition members be assembled using frames, columns, beams, etc. as appropriate.

The booth 10 is provided with an ejection device (ejection section) 120 that ejects air into the opening 105. The ejection device 120 can be attached to a part of the front wall 103 that is the end of the opening 105, for example. A suction device (suction section) 130 that sucks air is attached to a position opposite the ejection device 120 (for example, a part of the front wall 103 that is the edge of the opening 105). The ejection device 120 and the suction device 130 are disposed on the outside of the front wall 103 along a vertical line on the left and right of the opening 105. The ejection device 120 and the suction device 130 are disposed so that the air ejection port of the ejection device 120 and the air suction port of the suction device 130 face each other. The booth 10 of the first embodiment is provided with one ejection device 120 and one suction device 130. However, multiple ejection devices 120 may be arranged side-by-side along the edge of the opening 105, essentially acting as a single larger ejection device.

(Temperature control of the interior space)
An inlet 111 is provided on the bottom surface of the ceiling 101 for introducing temperature-controlled air into the internal space S of the booth 10. Air controlled to a predetermined temperature is sent from the air conditioner 150 to the inlet 111 through a pipe 143 to the inlet. The inlet 111 emits a uniform airflow (downflow) whose blowing direction is controlled downward into the internal space S. In FIG. 1, the inlet 111 is depicted as two members separated to the left and right, but this is an example, and the inlet 111 may be composed of a single member or two or more members, and may be provided on approximately the entire surface of the ceiling 101. The inlet 111 is attached to the rear wall 104 as illustrated in FIG. 1, and may not be a shape extending in the depth direction, and may be, for example, suspended from the ceiling 101 or embedded in the ceiling 101. In addition, it is preferable that the inlet 111 is provided with a filter or mesh for removing dust and the like.

The air sent into the internal space S is drawn into the outlet 112 provided at the bottom of the rear wall 104 and collected in the air conditioning unit 150 through the piping 144 to the outlet. The shape of the outlet 112 may be a horizontally long rectangle as shown in FIG. 1, but other shapes and any number of holes may be used as appropriate. The piping here may specifically be a circular tubular member, a square tubular member, a duct, etc., and the same applies below.

In this way, the temperature-controlled air is circulated by the air conditioner 150, thereby controlling the internal space S of the booth 10 to a predetermined temperature. The wind speed of the airflow blown out from the inlet 111 is not limited to a specific value, but it is desirable that the wind speed be gentle, between 0.1 and 1 m/s. If the wind speed is high, the airflow may directly hit the equipment and fixtures installed in the internal space S, resulting in partially cooled areas, which may cause temperature distribution. In this application, the wind speed of the airflow is defined as the wind speed (blowing wind speed) directly below the outlet of the inlet, outlet, etc.

In addition, it is not desirable from the standpoint of temperature control for outside air to flow directly into the internal space S. Therefore, the internal space S is maintained at a slightly positive pressure by the air conditioning unit 150. As a result, a small amount of air flows out of the internal space S through the openings 105 etc. (EA in Figure 2). To compensate for the air that flows out and further maintain the internal space S at a positive pressure, the air conditioning unit 150 takes in air from the outside air intake 151, adjusts the temperature together with the air recovered from the internal space S, and provides the required volume of air to the required locations.

(Airflow control at openings)
Furthermore, the characteristic airflow control at the opening 105 will be described with reference to Fig. 3 and Fig. 4. Fig. 3 is a schematic diagram showing the jetting device 120 according to the embodiment 1. Fig. 4 is a schematic diagram showing a horizontal cross section of the booth 10.

The jetting device 120 is supplied with temperature-controlled air through a pipe 141 from the air conditioning device 150 to the jetting device. The jetting device 120 has an outer jet 121 (first jet) and an inner jet 122 (second jet), each of which is vertically long and corresponds to the vertical length of the opening 105. The outer jet 121 and the inner jet 122 are parallel to each other. The outer jet 121 is provided farther from the internal space S than the inner jet 122. The lengths of the outer jet 121 and the inner jet 122 are not limited to a specific value, but may be, for example, 2 to 5 m. Also, as described above, when a configuration is made in which a plurality of jetting devices 120 are installed side by side along the edge of the opening 105, the lengths of the outer jet 121 and the inner jet 122 are not limited to a specific value, but may be, for example, about 0.5 to 2 m.

The outer air outlet 121 blows out the outer airflow 126 (first airflow) in a horizontal direction parallel to the plane formed by the opening 105 (parallel to the front wall 103). Here, the outer airflow 126 is a layered airflow that covers the opening 105, that is, an air curtain. The inner air outlet 122 blows out the inner airflow 127 (second airflow) in a horizontal direction parallel to the plane formed by the opening 105 (parallel to the front wall 103). Here, the inner airflow 127 is a layered airflow that covers the opening 105, which is also an air curtain. The directions of the outer airflow 126 and the inner airflow 127 are parallel and in the same direction.

The inner airflow 127 is weaker than the outer airflow 126. Here, a weaker airflow means that the wind speed is relatively small (slow). The preferred wind speed of the outer airflow 126 is 4 to 8 m/s, typically 5 m/s. The preferred wind speed of the inner airflow 127 is relatively smaller than the wind speed of the outer airflow 126, and is 3 to 6 m/s, typically 4 m/s. Furthermore, by maintaining the internal pressure at a positive pressure, it is possible to reduce the wind speed. In that case, the preferred wind speed of the outer airflow 126 is 3 to 6 m/s, and the preferred wind speed of the inner airflow 127 is 2 to 4 m/s. By reducing the wind speed, the turbulence of the air flow is reduced, and the effect of the present invention of suppressing the influence of external disturbances on the internal space S can be further exerted.
In any case, the wind speeds of the outer airflow 126 and the inner airflow 127 are not limited to the above ranges and may be different values as appropriate. However, as described above, the outer airflow 126 needs to have a higher wind speed than the inner airflow 127.

More preferably, the wind speed of the inner airflow 127 is greater than the wind speed of the airflow blown out from the inlet 111 in the internal space S.

The suction device 130 serves to suck in air without disturbing the outer airflow 126 and the inner airflow 127, which flow as laminar airflows. The suction device 130 preferably has two vertically long suction ports, one for the outer airflow 126 and the other for the inner airflow 127. However, the suction device 130 may have one vertically long suction port that sucks in both the outer airflow 126 and the inner airflow 127. The length of the vertically long suction port is preferably about the same as the outer outlet 121 or the inner outlet 122 of the ejection device 120. The air sucked in by the suction device 130 is sent to the air conditioner 150 through a pipe 142 to the suction device.

The wind speed of the outer airflow 126 and the inner airflow 127 can be adjusted appropriately according to the distance between the ejection device 120 and the suction device 130. The distance between the ejection device 120 and the suction device 130 is, in detail, the distance between the outer ejection port 121 (first ejection port) of the ejection device 120 and the suction port of the suction device 130 that sucks in the outer airflow 126, and the distance between the inner ejection port 122 (second ejection port) of the ejection device 120 and the suction port of the suction device 130 that sucks in the inner airflow 127. The preferred wind speed of the outer airflow 126 relative to the distance between the ejection device 120 and the suction device 130 is 2.5 to 5.5 m/s per meter of distance between the ejection device 120 and the suction device 130, and can be typically 3.3 m/s. A preferred wind speed of the inner airflow 127 relative to the distance between the ejection device 120 and the suction device 130 may be 2 to 4 m/s per meter of distance between the ejection device 120 and the suction device 130, typically 2.7 m/s. Furthermore, when the internal pressure is maintained at a positive pressure, the outer airflow 126 may be 2 to 4 m/s and the inner airflow 127 may be 1 to 3 m/s per meter of distance between the ejection device 120 and the suction device 130. By reducing the wind speed, turbulence of the air flow is reduced, and the effect of the present invention of suppressing the influence of external disturbances on the internal space S can be further exerted.

(Effects of the First Embodiment)
With the above-described configuration, the booth 10 according to the first embodiment achieves the following.

An opening 105 is provided in part of the front wall 103, making it easy for workers to enter and exit the booth and for items to be brought in and out, and providing good access to the interior space S. This improves the efficiency of various tasks that use the booth 10.

In general, in a booth with such an opening, it is difficult to control the air conditioning of the internal space due to the inflow of outside air and the outflow of air from the internal space. For example, when temperature control is performed as the air conditioning control, it becomes difficult to maintain a predetermined uniform temperature in the internal space S due to the inflow of outside air (an example of an external disturbance) with insufficient temperature control. In addition, the inflow of wind (an example of an external disturbance) into the internal space also disrupts the air flow in the internal space. However, in the booth 10, the opening 105 is configured to form an airflow that acts as an air curtain, so the inflow of outside air and the outflow of air from the internal space are suppressed. In other words, it works in the direction of blocking off the inside and the outside.

In addition, in the booth 10, an outer airflow 126 (first airflow) and an inner airflow 127 (second airflow) are formed at the opening 105, and the inner airflow 127 has a characteristic configuration in which it is weaker than the outer airflow 126. The significance of such a characteristic configuration will be explained below.

The inventors initially investigated a configuration in which a single-layer airflow (air curtain) would be formed at the opening. They found that when the airflow speed was low, the effect of suppressing the inflow of outside air and the outflow of air from the internal space was poor, and the target temperature control in the internal space S could not be achieved. More specifically, the target temperature control here means being able to control the temperature distribution in the internal space S to within ±0.1 degrees of the target temperature value.

Next, we tried to increase the speed of the airflow to improve the effect of blocking off inside and outside. However, when we tried to increase the speed of the single-layer airflow, it drew in and accelerated the air in the internal space, causing the airflow to enter the internal space. As a result, parts of the internal space had high wind speeds, and the target temperature control in the internal space could not be achieved. This is because the temperature distribution in the internal space S was disrupted by the formation of parts with high wind speeds. We investigated various wind speeds, but it was not possible to achieve the target temperature distribution in the internal space with a single-layer airflow (air curtain).

Although we have explained the temperature distribution in the internal space S here, the same is true for the humidity distribution.

It was also found that the use of a single-phase airflow does not effectively prevent dust from entering the interior space S. If the wind speed of the single-phase airflow is reduced, there is a risk that the airflow will not be effective in preventing dust from entering the interior space S. On the other hand, if the single-phase airflow is increased, dust may be caught in the airflow entering the interior space S, resulting in the dust being mixed into the interior space.

The inventors therefore came up with the idea of forming two layers of airflow at the opening 105: an outer airflow 126 with a high wind speed, and an inner airflow 127 that is weaker than the outer airflow 126, and completed the present invention. The outer airflow 126 with a high wind speed serves to provide a sufficient effect of blocking the inside from the outside. In other words, it serves to suppress the effects of external disturbances on the internal space S. Meanwhile, the relatively weak inner airflow 127 serves to suppress the outer airflow 126 with a high wind speed from entering the internal space S. By adopting such a unique airflow configuration and arrangement, the booth 10 can achieve the desired temperature and humidity control in the internal space S, and can also effectively prevent dust from entering the internal space.

Furthermore, the booth 10 is provided with a suction device 130 that is provided at the edge of the opening 105 opposite the ejection device 120 and that sucks in air. This configuration prevents the outer airflow 126 (first airflow) and the inner airflow 127 (second airflow) from being disturbed even in areas of the opening 105 that are away from the outer ejection port 121 and the inner ejection port 122, respectively. This makes it possible to effectively achieve the target temperature control and humidity control in the internal space S, and to prevent the intrusion of dust.

In addition, by making the directions of the outer airflow 126 (first airflow) and the inner airflow 127 (second airflow) horizontal, the ejection device 120 and the suction device 130 can be placed vertically on the left and right of the opening 105. Therefore, a booth equipped with the ejection device 120 and the suction device 130 can be easily manufactured.

In the booth 10, the outer airflow 126 (first airflow) and the inner airflow 127 (second airflow) are formed by air supplied from the air conditioning device 150. By forming the outer airflow 126 and the inner airflow 127 with air that has been air-conditioned by the air conditioning device 150, factors that disrupt the control of the internal space S are suppressed, and the desired air conditioning control in the internal space S is reliably achieved.

The ejection device 120 according to the first embodiment used in the booth 10 includes an outer ejection port 121 (first ejection port) for forming an outer airflow 126 (first airflow) and an inner ejection port 122 (second ejection port) for forming an inner airflow 127 (second airflow) that is weaker than the outer airflow 126. By applying the ejection device 120 of this configuration to a booth with an opening, it is possible to achieve good temperature control of the inner space while providing good access to the inner space.

[Embodiment 2]
Other embodiments of the present invention will be described below. For ease of explanation, the same reference numerals will be used to designate components having the same functions as those described in the above embodiment, and the description thereof will not be repeated.

Figure 5 is a diagram showing a schematic configuration of the booth 20 according to embodiment 2. Figure 5 (1) is a diagram showing a schematic horizontal cross section of the booth 20 according to embodiment 2. Unlike the booth 10 according to embodiment 1, the booth 20 does not have a suction device 130 and piping 142 to the suction device. Also, unlike the booth 10, the booth 20 has a jetting device 120 on both the left and right edges of the opening 105. Each jetting device 120 is connected to a piping 141 to the jetting device for supplying air-conditioned (temperature-controlled) air from the air conditioning device 150.

The left and right ejection devices 120 each form two layers of airflow: an outer airflow 226 (first airflow) with a high wind speed, and an inner airflow 227 (second airflow) that is weaker than the outer airflow 226. Therefore, the outer shapes of the left and right ejection devices 120 are mirror images of each other. Note that both airflows are oriented horizontally.

The preferred wind speed of the outer airflow 226 is 2 to 4 m/s, typically 3 m/s. The preferred wind speed of the inner airflow 227 is relatively slower than the wind speed of the outer airflow 226, and is 1 to 3 m/s, typically 2 m/s. In any case, the wind speeds of the outer airflow 226 and the inner airflow 227 are not limited to the above ranges, and can be different values as appropriate. However, as described above, the outer airflow 226 needs to have a higher wind speed than the inner airflow 227.

In addition, the wind speeds of the outer airflow 226 and the inner airflow 227 can be appropriately adjusted according to the distance between the outer outlets 121 (first outlets) and inner outlets 122 (second outlets) of the left and right ejection devices 120. A preferred wind speed of the outer airflow 226 relative to the distance between the left and right outer outlets 121 is 1 to 3 m/s per meter of distance between the left and right outer outlets 121, and can be typically 2 m/s. A preferred wind speed of the inner airflow 227 relative to the distance between the left and right inner outlets 122 is 0.5 to 2 m/s per meter of distance between the left and right inner outlets 122, and can be typically 1.3 m/s.

In the booth 20 according to the second embodiment, air is supplied from the left and right air ejection devices 120, so the wind speed of the outer airflow 226 and the inner airflow 227 can be reduced compared to when air is supplied from one side. This reduces turbulence in the air flow, and further enhances the effect of the present invention of suppressing the effect of external disturbances on the internal space S.

The rest of the configuration is the same as that of the booth 10 according to embodiment 1. Therefore, the booth 20 can also obtain the same effects as those of embodiment 1, except for the effects of the suction device 130.

In addition, in the booth 20, the outer airflow 226 and the inner airflow 227 are formed from the left and right sides of the opening 105, so that each airflow (air curtain) easily covers the opening 105. Therefore, it is easy to widen the width of the opening 105. On the other hand, since the airflows from the left and right meet near the center of the width of the opening 105, there is a risk that the airflow will be easily disturbed. Therefore, it is preferable that the directions of the outer airflow 226 and the inner airflow 227 are approximately parallel to the plane formed by the opening 105 (approximately parallel to the front wall portion 103) but slightly outward, so that the outer airflow 226 and the inner airflow 227 are less likely to enter the internal space S.

5(2) is an explanatory diagram showing angles θi1 and θi2 of the inner airflows 227 with respect to the plane P formed by the opening 105. The angles θi1 and θi2 of the left and right inner airflows 227 are not particularly limited, but are preferably 0 to 45°. The lower limit is, for example, 1° or more, 3° or more, 5° or more, or 10° or more. The upper limit is, for example, 40° or less, 35° or less, or 30° or less. The angles θi1 and θi2 of the left and right inner airflows 227 may be the same angle or different angles.
Similarly, for the outer airflows 226, the angles θo1 and θo2 of the left and right outer airflows 226 are not particularly limited, but are preferably 0 to 45°. The lower limit is, for example, 1° or more, 3° or more, 5° or more, or 10° or more. The upper limit is, for example, 40° or less, 35° or less, or 30° or less. The angles θo1 and θo2 of the left and right outer airflows 226 may be the same angle or different angles.
Furthermore, the angle of the inner airflow 227 and the angle of the outer airflow 226 may be the same or different.
The angles (θi1, θi2, θo1, θo2) may be variably controlled according to conditions such as the temperature and humidity of the internal space S and the external space. This allows the influence of disturbances on the internal space S to be better suppressed, for example, even when there is a change in the external environment. As a specific example, when the temperature in the external space rises, the external airflow 226 and the internal airflow 227 are warmed by radiant heat emitted from the floor, etc., making it easier for the external airflow and the internal airflow to enter the internal space S. In such a case, the influence of disturbances can be suppressed by directing the angle further outward.

[Embodiment 3]
6 is a diagram showing a schematic vertical cross section of the booth 30 according to the embodiment 3. Unlike the booth 10 according to the embodiment 1, the booth 30 does not include the suction device 130 and the piping 142 to the suction device. Also, unlike the booth 10, the booth 30 includes a horizontally placed jetting device 320 on the upper edge of the opening 105. A piping 141 to the jetting device is connected to the jetting device 320 for supplying air-conditioned (temperature-controlled) air from the air-conditioning device 150.

The blowing device 320 forms two layers of airflow: an outer airflow 326 (first airflow) with a high wind speed, and an inner airflow 327 (second airflow) that is weaker than the outer airflow 326. Both airflows are directed vertically downward.

The rest of the configuration is the same as that of the booth 10 according to embodiment 1. Therefore, the booth 30 can also obtain the same effects as those of embodiment 1, except for the effects of the suction device 130.

In the booth 30, an outer airflow 326 and an inner airflow 327 are formed from above the opening 105. Therefore, the width of the opening 105 is not easily restricted, and it is easy to widen the width of the opening 105. In addition, multiple ejection devices 320 may be arranged side by side along the upper edge of the opening 105.

The ejection device 320 according to the third embodiment used in the booth 30, like the ejection device 120 according to the first embodiment, is provided with an outer ejection port (first ejection port) for forming an outer airflow 326 (first airflow) and an inner ejection port (second ejection port) for forming an inner airflow 327 (second airflow) weaker than the outer airflow 326. By applying the ejection device 320 of this configuration to a booth with an opening, it is possible to realize good temperature control of the inner space while providing good access to the inner space.

[Embodiment 4]
FIG. 7 is a diagram showing a schematic cross section in a vertical plane to show a general configuration of the booth 31 according to the fourth embodiment. The booth 31 according to the fourth embodiment is obtained by adding a suction device 330 arranged to face the ejection device 320 and a pipe connected to the suction device to the booth 30 according to the third embodiment. In the fourth embodiment, the suction device 330 is arranged below the opening 105. The suction device 330 can be arranged at a position higher than the floor surface 90. In this case, the construction of the booth is easy. Alternatively, the suction device can be arranged at a position lower than the floor surface 90. In this case, access to the internal space is not hindered. The booth according to the fourth embodiment can also obtain the same effects as those of the above embodiments.

[Embodiment 5]
8 is a diagram showing a schematic vertical cross section of the booth 11 according to embodiment 5. The booth 11 according to embodiment 5 is obtained by removing the suction device 130 and the piping 142 to the suction device from the booth 10 according to embodiment 1. The booth 11 according to embodiment 5 can also obtain the same effects as the booth 10 according to embodiment 1, except for the effects provided by the suction device 130.

[Embodiment 6]
9 is a diagram showing a schematic front view of the booth 12 according to embodiment 6. The booth 60 according to embodiment 6 is the booth 10 according to embodiment 1, further comprising an upper cover 160 that covers the upper part of the opening 105, and the other configurations are the same.

When the air supplied from the ejection device 120 has a lower temperature than the air in the external space, the air supplied from the ejection device 120 is heavier than the air in the external space and therefore tends to flow downward. Therefore, there is a risk that outside air may easily flow in from the upper part of the opening 105. According to the booth 12 of the sixth embodiment, since the upper cover 160 that covers the upper part of the opening 105 is provided, the inflow of outside air from the upper part of the opening 105 can be suppressed.
Furthermore, since the air supplied from the jetting device 120 is diffused up, down, left and right, in the booth 10 according to the first embodiment, some of the air above the opening 105 is dispersed upwards without flowing toward the suction device 130. However, by providing the upper cover 160, the air supplied from the jetting device 120 can be rectified toward the suction device 130.

The shape of the upper cover 160 is not particularly limited, but may be, for example, a plate member installed in a horizontal direction. From the viewpoint of straightening the flow of air supplied from the ejection device 120, it is preferable that the surface of the upper cover 160 on the opening 105 side is formed along the direction in which the air supplied from the ejection device 120 flows.

[Embodiment 7]
10 is a diagram showing a schematic front view of the booth 21 according to the seventh embodiment. The booth 21 according to the seventh embodiment is the booth 20 according to the second embodiment, provided with an upper cover 160 that covers the upper part of the opening 105, but otherwise has the same configuration. As in the sixth embodiment, the provision of the upper cover 160 makes it possible to suppress the inflow of outside air from the upper part of the opening 105.
In addition, the air supplied from the ejection device 120 can be rectified toward the center of the opening 105 .

The shape of the upper cover 160 is the same as in the sixth embodiment, for example, a plate member installed in a horizontal direction. From the viewpoint of straightening the flow of air supplied from the ejection device 120, it is preferable that the surface of the upper cover 160 on the opening 105 side is formed along the direction in which the air supplied from the ejection device 120 flows.

[Embodiment 8]
11 is a diagram showing a schematic front view of the booth 13 according to embodiment 8. The booth 13 according to embodiment 8 is different from the booth 10 according to embodiment 1 in that the wind speed of the air (outer airflow 126 and inner airflow 127) supplied from the jetting device 120 is different between the upper and lower parts. More specifically, in the booth 13 according to embodiment 8, the wind speed of the air (outer airflow 126 and inner airflow 127) supplied from the jetting device 120 is faster at the upper part than at the lower part. Other configurations are similar.

When the air supplied from the ejection device 120 is at a lower temperature than the external space, the air supplied from the ejection device 120 is heavier than the air in the external space and therefore tends to flow downward. Therefore, there is a risk that outside air may easily flow in from the top of the opening 105. According to the booth 13 of embodiment 8, the wind speed of the air on the upper side of the opening 105 is faster than the wind speed of the air on the lower side, so that the inflow of outside air from the top of the opening 105 can be suppressed.

When the wind speed of the air (outer airflow 126 and inner airflow 127) supplied from the ejection device 120 is changed between the upper and lower parts, it may be set at two speed stages, high and low, or it may be set at multiple speed stages, with the speed gradually increasing upward.

In addition, the configuration of making the air speed on the upper side faster than the air speed on the lower side includes not only a means for increasing the linear velocity of the air on the upper side, but also a means for increasing the amount of air on the upper side.

Here, the wind speed of the air sucked in by the suction device 130 may be a constant wind speed in the vertical direction, or, similar to the air supplied from the ejection device 120, the wind speed of the air sucked in at the upper side may be set to be higher than that at the lower side.

As a modified example of the booth 13 according to embodiment 8, when the air supplied from the blowing device 120 is at a higher temperature than the outside space, the wind speed of the air on the lower side can be set faster than the wind speed of the air on the upper side. The air supplied from the blowing device 120 is lighter than the air in the outside space and therefore has a tendency to flow upward. Therefore, in this case, by setting the wind speed of the air on the lower side faster than the wind speed of the air on the upper side, the inflow of outside air can be suppressed.

[Embodiment 9]
12 is a diagram showing a schematic front view of the booth 22 according to the 9th embodiment. The booth 22 according to the 9th embodiment is different from the booth 20 according to the 2nd embodiment in that the wind speed of the air (the outer airflow 226 and the inner airflow 227) supplied from the two blowing devices 120 is different between the upper and lower parts. More specifically, the booth 22 according to the 9th embodiment is such that the wind speed of the air (the outer airflow 226 and the inner airflow 227) supplied from the blowing devices 120 at the upper part is faster than the wind speed of the air at the lower part. The other configurations are the same.
The setting of the wind speed of the air supplied from the ejection device 120 is the same as in the eighth embodiment, and therefore will not be described here.

〔simulation result〕
13 to 15 are diagrams showing the results of a simulation of the temperature distribution of the booth of the present invention. The conditions of the simulation were that the temperature of the inner space was 23°C, the temperature of the outer space was 28°C, and the effect of each configuration was verified with the goal of satisfying ±0.1°C as the temperature control of the inner space. In the case of the first embodiment and the sixth embodiment shown in FIG. 13, in which the blowing device was installed only on one side, the wind speed of the outer airflow and the inner airflow was set to 2 m/s. In the case of the second embodiment shown in FIG. 14 and the seventh embodiment shown in FIG. 15, in which the blowing device was installed on both sides, the wind speed of the outer airflow and the inner airflow was set to 2 m/s for each blowing device. In each simulation result, the left figure shows the temperature distribution of the vertical cross section of the opening at the position of the inner blowing port, and the right figure shows the temperature distribution of the vertical cross section of the opening at the position of the outer blowing port.

13 shows (1) the temperature distribution using the booth of embodiment 1, and (2) the temperature distribution using the booth of embodiment 7. In both (1) and (2), excellent temperature distribution was obtained at the position of the inner nozzle. This is believed to be because the outer airflow blocks disturbances while the inner airflow suppresses the inflow of the outer airflow into the internal space.
In addition, comparing (1) and (2), it was found that a better temperature distribution was achieved when the upper cover 160 was provided. This is believed to be because the airflow ejected from the ejection device 120 was rectified along the upper cover 160 to the suction device 130 without dispersing in the upward direction.

Figure 14 shows (3) the temperature distribution of the openings in the booth of embodiment 2 when the airflow direction (θi1 and θi2, θo1 and θo2) is 0°, (4) the temperature distribution of the openings in the booth of embodiment 2 when the airflow direction (θi1 and θi2, θo1 and θo2) is 15°, and (5) the temperature distribution of the openings in the booth of embodiment 2 when the airflow direction (θi1 and θi2, θo1 and θo2) is 30°.
Comparing (3), (4), and (5), it was found that the temperature distribution (not shown) in the booth was the best when (4) the airflow direction (θi1 and θi2, θo1 and θo2) was 15°, followed by (5) the airflow direction was 30°, and (3) the airflow direction was 0°, in that order. This is thought to be because by directing the airflows ejected from both sides of the opening slightly outward, the airflows are guided toward the outside space when the airflows on both sides collide with each other.

Figure 15 shows (6) the temperature distribution of the openings in the booth of embodiment 7 when the airflow direction (θi1 and θi2, θo1 and θo2) is 0°, (7) the temperature distribution of the openings in the booth of embodiment 7 when the airflow direction (θi1 and θi2, θo1 and θo2) is 15°, and (8) the temperature distribution of the openings in the booth of embodiment 7 when the airflow direction (θi1 and θi2, θo1 and θo2) is 30°.
Comparing (6), (7), and (8), it was found that, similarly to the case of the booth of embodiment 2, (7) when the airflow direction (θi1 and θi2, θo1 and θo2) was 15°, the temperature distribution in the booth (not shown) was the best, followed by (8) when the airflow direction was 30°, and (6) when the airflow direction was 0°, in that order.
In addition, when comparing (6) with (4), (6) had a better temperature distribution. In other words, the upper cover that covers the upper part of the opening is particularly effective in maintaining the temperature in the internal space.

[Additional Notes]
In each of the above-described embodiments, the airflow covering the opening is constituted by a first airflow on the outside and a second airflow on the inside, but for example, this does not prevent the formation of a third airflow between the first airflow and the second airflow. In this way, two or more multi-layer airflows can be formed.

In each of the above-mentioned embodiments, each booth may be installed in a room of a factory or the like so as to form a further partitioned internal space S. However, the booth in the present invention is not limited to this, and the internal space S may be a room constructed as part of a building in a factory or the like. Also, the booth may not be equipped with an air conditioning device, and by applying each embodiment, the intrusion of dust can be effectively prevented.

〔summary〕
The booth according to aspect 1 of the present invention is provided with an outlet section which ejects air into an opening leading to an internal space separated from an external space, and the outlet section is configured to form a first airflow which prevents disturbances from the external space from being introduced into the internal space, and a second airflow which is located inside the first airflow and prevents the first airflow from being introduced into the internal space.

The above configuration allows for the creation of a booth that allows easy access to the interior space without deteriorating environmental conditions.

The booth according to aspect 2 of the present invention may be configured as in aspect 1 above, such that the outlet portion outlets air so that the second airflow is weaker than the first airflow.

With the above configuration, it is possible to specifically realize a second air flow that prevents the first air flow from being introduced into the internal space.

The booth according to aspect 3 of the present invention comprises an air outlet provided at an opening leading to an internal space separated from an external space, which outlet outlet ejects air toward the opening, and the air outlet is configured to eject air so as to form a first airflow and a second airflow which is formed inside the first airflow and is weaker than the first airflow.

The above configuration allows for the creation of a booth that allows easy access to the interior space without deteriorating environmental conditions.

The booth according to aspect 4 of the present invention may be configured in any one of aspects 1 to 3 above, such that the outlet section has a first outlet for forming the first air flow and a second outlet for forming the second air flow.

According to the above configuration, it is specifically possible to form the required first and second air flows.

The booth according to aspect 5 of the present invention may be configured in any one of aspects 1 to 4 above, in which the directions of the first air flow and the second air flow are horizontal.

According to the above configuration, a booth equipped with a suction device can be easily manufactured.

The booth according to aspect 6 of the present invention may be configured in any one of aspects 1 to 4 above, such that the directions of the first air flow and the second air flow are vertically downward.

With the above configuration, the opening is less restricted in the width direction, making it easier to widen the opening.

The booth according to aspect 7 of the present invention may be configured as in any of aspects 1 to 6 above, with a suction section that is provided opposite the ejection section and that draws in air.

The above configuration ensures that the desired air conditioning control is achieved in the interior space.

The booth according to aspect 8 of the present invention may be configured as in any one of aspects 1 to 5 above, characterized in that it has two ejection sections, the two ejection sections are arranged on both sides of the opening, and the directions of the first air flow and the second air flow formed by the two ejection sections are the direction of the opening and toward the external space.

With the above configuration, the inflow of outside air can be suppressed, thereby ensuring the desired air conditioning control in the interior space.

The booth according to aspect 9 of the present invention may be configured in any of aspects 1 to 8 above, with an upper cover that covers the upper part of the opening.

With the above configuration, the inflow of outside air can be suppressed, thereby ensuring the desired air conditioning control in the interior space.

The booth according to aspect 10 of the present invention may be configured as in any one of aspects 1 to 9 above, characterized in that the wind speeds of the first airflow and the second airflow formed by the ejection portion differ in the vertical direction.

With the above configuration, the inflow of outside air can be suppressed, thereby ensuring the desired air conditioning control in the interior space.

The booth according to aspect 11 of the present invention may be configured in any one of aspects 1 to 10 above, further comprising an air conditioning unit that controls the air conditioning of the internal space, and the first air flow and the second air flow are formed by air supplied by the air conditioning unit.

The above configuration ensures that the desired air conditioning control is achieved in the interior space.

The booth according to aspect 12 of the present invention may be configured in any of aspects 1 to 11 above, such that a partition member is provided between the external space and the internal space, except for the opening.

The above configuration makes it possible to specifically form the required internal space.

The ejection device according to aspect 13 of the present invention is an ejection device that ejects air into an opening leading to an internal space separated from an external space, and is configured to form a first airflow that prevents disturbances from the external space from being introduced into the internal space, and a second airflow that is located inside the first airflow and prevents the first airflow from being introduced into the internal space.

According to the above configuration, in a booth with an opening, a spraying device can be provided that allows good access to the interior space without deteriorating the environmental conditions of the interior space.

The ejection device according to embodiment 14 of the present invention is an ejection device that ejects air into an opening that leads to an internal space separated from an external space, and is configured to eject air so as to form a first air flow and a second air flow that is formed inside the first air flow and is weaker than the first air flow.

According to the above configuration, in a booth with an opening, a spraying device can be provided that provides good access to the interior space without deteriorating the environmental conditions of the interior space.

The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the claims. Embodiments obtained by appropriately combining the technical means disclosed in different embodiments are also included in the technical scope of the present invention.

10, 11, 12, 13, 20, 21, 22, 30 Booth 101 Ceiling part (partition member)
102 Side wall portion (partition member)
103 Front wall portion (partition member)
104 Rear wall portion (partition member)
105 Opening 111 Inlet 112 Outlet 120, 320 Spouting device (spouting section)
121 outer nozzle (first nozzle)
122 Inner nozzle (second nozzle)
126, 226, 326 Outer airflow (first airflow)
127, 227, 327 Inner airflow (second airflow)
130, 330 Suction device (suction unit)
141: Pipe to ejection device 142: Pipe to suction device 143: Pipe to inlet 144: Pipe to outlet 150: Air conditioning device (air conditioning section)
151 Outside air intake S Internal space P Plane formed by opening

Claims (15)

The air conditioner has an air outlet that blows air into an opening that serves as an entrance to an internal space separated from an external space,
The jetting portion is provided outside the booth,
The blowing section forms a first airflow that suppresses an external disturbance from the external space from being introduced into the internal space, and a second airflow that is located inside the first airflow and suppresses the first airflow from being introduced into the internal space,
the first airflow and the second airflow are ejected toward an entire area of the opening to cover the opening;
The booth is characterized in that the first air flow and the second air flow are in the same direction . The booth according to claim 1, characterized in that the blowing section blows air so that the second airflow is weaker than the first airflow. A blowing part is provided at an opening serving as an entrance to an internal space separated from an external space, and blows air toward the opening,
the blowing section blows out air so as to form a first airflow and a second airflow that is formed inside the first airflow and is weaker than the first airflow,
the first airflow and the second airflow are ejected toward an entire area of the opening to cover the opening;
The booth is characterized in that the first air flow and the second air flow are in the same direction . The booth according to any one of claims 1 to 3, characterized in that the blowing section has a first blowing port for forming the first air flow and a second blowing port for forming the second air flow. The booth according to any one of claims 1 to 4, characterized in that the directions of the first air flow and the second air flow are horizontal. The booth according to any one of claims 1 to 4, characterized in that the directions of the first air flow and the second air flow are vertically downward. The booth according to any one of claims 1 to 5 , further comprising a suction section that is provided opposite the blowing section and that sucks in air. The nozzle includes two nozzles,
The two jets are disposed on both sides of the opening,
6. The booth according to claim 1, wherein the directions of the first airflow and the second airflow formed by the two air outlets are in the direction of the opening and toward the exterior space. The booth according to any one of claims 1 to 5 or 7 to 8, further comprising an upper cover for covering an upper portion of the opening. 10. The booth according to claim 1 , wherein the first airflow and the second airflow formed by the air outlet have different wind velocities in a height direction. 7. The booth according to claim 6, further comprising a suction section that is provided opposite the blowing section and that draws in air. Further comprising an air conditioning unit that controls air conditioning of the internal space,
The booth according to claim 1 , wherein the first air flow and the second air flow are formed by air supplied by the air conditioning unit. The booth according to claim 1 , wherein a partition member is provided between the external space and the internal space except for the opening. A jetting device that jets air into an opening that serves as an entrance/exit to an internal space separated from an external space,
The jetting portion is provided outside the booth,
A first airflow that suppresses an external disturbance from the external space from being introduced into the internal space;
a second airflow that is located inside the first airflow and that prevents the first airflow from being introduced into the internal space;
the first airflow and the second airflow are ejected toward an entire area of the opening to cover the opening;
The ejection device , wherein the first air flow and the second air flow are directed in the same direction . A jetting device that jets air into an opening that serves as an entrance/exit to an internal space separated from an external space,
A first air flow;
air is ejected so as to form a second air flow which is formed inside the first air flow and is weaker than the first air flow;
the first airflow and the second airflow are ejected toward an entire area of the opening to cover the opening;
The ejection device , wherein the first air flow and the second air flow are directed in the same direction .