JP2002267229A - Air buffer system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a partition parting function due to air flow from being destroyed with turbulence, and reduce loss of heat, consumption of power, and noise. SOLUTION: Once a jet F1 from an air blow-off outlet 1 reaches the height of a restriction barrier 3, it flows along a surface 3a on a side opposite to an inside space S1 on the restriction barrier 3 due to Coanda effect and collides with an opposite all surface 7. Thereafter becomes a secondary air stream F2 and is directed to an outside boundary position P for an air buffer, while permitting temperature to approach the temperature of an outside space S2 and is dammed up by dam means 4 and is pushed up. Such an air ream is formed in a region S3 between the restriction barrier 3 and the dam means 4, whereby the region S3 as a whole acts as an air buffer between the outside space S2 and the inside space S1, and demonstrates a stable partition function.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air buffer system for forming a curtain by a jet of air in an inner space of a building to block air mixing, soot and the like in areas having different temperatures.

[0002]

2. Description of the Related Art In a building, an air curtain device is used as an air shield technology for separating an area having a different temperature or a concentration of soot contained in air into a continuous space without walls or doors by an air flow. Things are known.
FIG. 7 schematically shows a conventional air shield technique using an air curtain device.
And a push-pull type as shown in FIG. 7B.

[0003] Among them, a simplified air curtain device shown in FIG. 7 (A) is provided with an air outlet 101 from a blower on a ceiling, a floor, or a side wall, and the air outlet 1
Air jet (air curtain) from 01 to the opposite surface
F1 is blown out like a curtain to prevent the invasion of external cold air or warm air. The illustrated example is an air outlet 101.
Is provided on the ceiling 103, and the jet F1 is directed to the opposite wall surface (floor surface) 10
4 is blown out vertically.

The air jet F1 may be isothermal with the outer space S1, may be lower in temperature than the outer space S1, may be higher in temperature than the outer space S1, and may heat or cool the inner space S2. Depending on the purpose of use, such as
Appropriately selected. In the case of this simple type, the jet F
When 1 reaches the opposing wall surface 104, it mixes with the air in the outer space S1 and the air in the inner space S2 to generate a secondary airflow F2. Therefore, care must be taken to prevent the secondary airflow F2 from affecting the inner space S2. become.

The push-pull type air curtain device shown in FIG. 7 (B) has an air outlet 101 provided on a ceiling, a floor or a side wall, and an air inlet facing the air outlet 101 on an opposing wall surface. With the provision of the nozzle 102, the jet F <b> 1 vertically blown out from the air outlet 101 is sucked in by the opposed inlet 102.

A push-pull type air curtain device is
Compared to the simplified type shown in FIG.
The air shield effect is high because there is little decrease in the jet velocity near the area and there is no influence of the secondary air flow. However, on the other hand, power consumption, installation space and cost of the blower increase.

[0007]

The following problems are pointed out in the conventional air shield technology using the above-described air curtain device.

In the air curtain device, an air outlet 101 is usually provided on a ceiling 103 from the viewpoint of installation and use. When the inner space S2 is a living space, warm air is supplied in winter to improve the thermal environment near the air curtain.
Cool air blows out in summer. In the winter season, warm air blown out from the ceiling air outlet 101 receives buoyancy due to ambient air having a lower temperature, so that a warm air jet reaches the floor surface 104 against this buoyancy. The blowing speed needs to be considerably increased. However, as the blowing speed increases, the mixing with the surrounding air also increases, so that the heat loss increases, and moreover, power consumption for blowing air and noise due to wind noise increase.

In the air curtain, since the air shield layer formed by the jet F1 is disturbed by being traversed by a person or an object, the sorting performance with respect to the temperature, the concentration of soot contained in the air, and the like is significantly reduced. In addition, external wind and airflow near the air curtain also hinder the formation of the air shield layer. In order to cope with such a disturbance in the related art, there is no other way but to increase the blowing speed. Therefore, as described above, heat loss due to mixing with surrounding air, power consumption and wind A problem such as an increase in sound occurs.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has a technical problem in that a function of separating air is hardly destroyed by disturbance, and heat loss, power consumption, and noise are reduced. Is to do.

[0011]

FIG. 1 is an explanatory view showing a schematic configuration of an air buffer system according to the first embodiment of the present invention. The right side of FIG. 1 shows the temperature and the concentration of soot contained in the air. The inner space S1 to be classified is the outer space S2 on the left side. That is, the air buffer system includes an air outlet 1 of a jet F1 which is provided on one wall surface 6 inside a position P which is to be an outer boundary of the air buffer and is connected to an air conditioner 2; A constraining barrier 3 provided on the other wall surface 7 opposite to the inner boundary of the jet F1 from the air outlet 1 and an outer boundary of the air buffer provided on the other wall surface 7 And a weir means 4 for blocking the secondary airflow F2 from the restraint barrier 3 at the position P.

In the structure of the first aspect of the present invention, when the jet F1 from the air outlet 1 reaches the height of the constraining barrier 3, the jet F1 is constrained by the Coanda effect, that is, the property that the airflow flows along the surface of the object. In order to flow along the barrier 3, the blowing speed from the air outlet 1 may be any speed that can reach the constrained barrier 3.
The blowing speed can be made lower than in the case of reaching the other opposed wall surface 7 without providing the restraint barrier 3, and the power consumption in the air conditioner 2 can be reduced. The required wind speed of the jet F1 from the air outlet 1 can be easily obtained by a non-isothermal jet equation.

The constraining barrier 3 is connected to a jet F1 from the air outlet 1.
The jet F1 flows along the surface 3a of the constrained barrier 3 on the side opposite to the inner space S1 due to the Coanda effect, and collides with the opposing wall surface 7 because of the Coanda effect.
A secondary airflow F2 is formed along the wall surface 7. Secondary airflow F2
Moves toward the outer boundary position P of the air buffer while the temperature gradually approaches the temperature of the outer space S2, is blocked by the weir means 4 provided there, and is converged and pushed up.

The air flow as described above is formed in the region S3 between the restraining barrier 3 and the weir means 4, whereby
The entire area S3 functions as an air buffer between the inner space S1 and the outer space S2. Air buffer area S3
Inside, there is a temperature gradient in which the temperature gradually approaches the temperature of the outer space S2 from the vicinity of the restraint barrier 3 to the vicinity of the weir means 4. And the temperature of the air in the air buffer area S3 is
In the vicinity of the weir means 4, the temperature difference with the outer space S2 is small,
Moreover, since the weir means 4 suppresses ventilation due to a temperature difference from the outer space S2, heat loss is reduced.

Further, even in the vicinity of the constrained barrier 3, the temperature difference between the jet F1 from the air outlet 1 and the surrounding air is small. To reach the wall surface 7 more easily. As a result, power consumption in the air conditioner 2 to the air outlet 1 can be reduced, and heat loss due to mixing of the jet F1 with surrounding air can be suppressed.

FIG. 2 is a schematic structural explanatory view showing the structure of the air buffer system according to the second aspect of the present invention. That is, in the air buffer system according to the second aspect of the present invention, the jet F which is provided on one wall surface 6 inside the position P to be the outer boundary of the air buffer and is connected to the air conditioner 2 is provided.
1; an air outlet 1; a constraining barrier 3 provided on the other wall 7 facing the wall 6 near the inner boundary of the jet F1 from the air outlet 1; And a blower 5 for blowing the secondary airflow F2 from the constraining barrier 3 toward the one wall surface 6 at a position P to be the outer boundary of the air buffer.

According to the configuration of the second aspect, the secondary airflow F2 from the restriction barrier 3 side to the outer boundary position P of the air buffer.
Is forcibly blown toward the wall surface 6 by the blower 5 provided therein. For this reason, since the jet F3 from the blower 5 forms a kind of air shield layer, as described above, the temperature difference between the outer space S2 and the outer space S2 near the outer boundary position P of the air buffer is small. Thus, heat loss due to temperature difference ventilation with the outer space S2 is effectively suppressed. Note that the required wind speed of the jet F3 from the blower 5 can be easily obtained by a non-isothermal jet equation.

In the air buffer system according to the first or second aspect of the present invention, different regions such as the temperature and the concentration of soot contained in the air are divided into jets F from the air outlet 1.
1 and the area S from the constrained barrier 3 to the weir means 4 or the blower 5 instead of relying solely on the jet F3 from the blower 5.
Since the whole 3 functions as a buffer, it is not easily destroyed by disturbances such as traversing a person or an object or wind pressure from the outside, and has a stable function.

In this system, the effect is impaired by disturbance when a large amount of outside air flows into the air buffer area S3 at once, and the air in the air buffer area S3 suddenly approaches the outside state. It is. what if,
Even if the same amount of outside air as the air mass in the air buffer region S3 enters, the temperature in the air buffer region S3 becomes the average temperature of the temperature of the outer space S2 and the temperature in the air buffer region S3 immediately before the outside air enters. Only.

In the air buffer system according to the third aspect of the present invention, as shown in FIG. 3, which will be described later, the other wall surface is a floor surface 22, and a restraining barrier and weir means are installed on the floor surface 22. It is formed by furniture 13, a screen, handrails 14, and the like. That is, by appropriately arranging furniture, screens, handrails, and the like, it can be used as a restraint barrier and a dam unit in the present system.

In the air buffer system according to a fourth aspect of the present invention, as shown in FIGS. 5 and 6 described later, the other wall surface is the floor surfaces 22 and 25, and the restraining barrier and the weir means are provided as follows.
The rising surface 23 of the concave portion 23 formed on the floor surfaces 22 and 25
a, 23b and 25a, wherein the recess 23 is covered with a ventilation plate 24 through which air can flow. That is, when the restraining barrier and the weir means are formed higher than the floor surface, it is conceivable that the movement of a person or an object may be hindered. However, according to the configuration of claim 4, the restraint does not become such an obstacle. Barriers and weir means can be formed.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, specific embodiments of the present invention will be described. First, FIG. 3 is a schematic configuration explanatory view showing a first embodiment in which the air buffer system of the present invention is applied to an open type atrium.

In FIG. 3, reference numeral 21 denotes a ceiling plate as one wall surface, and reference numeral 22 denotes a floor surface as the other wall surface, and a continuous space without walls or doors is formed between the two 21 and 22. The right side in the figure is an office S11, which is an inside space to be classified by the present system,
The left side is the atrium S12 which is the outer space. Between the office S11 and the atrium S12, a passage S13 serving as an air buffer area according to the present system extends in a direction orthogonal to the cross section shown in the drawing.

The ceiling plate 21 is located inside the boundary position P1 between the passage S13 and the atrium S12, specifically, the passage S
An air outlet 11 is provided at the end of the office 13 on the side of the office S11 and extends in a direction perpendicular to the cross section shown in the figure, and is connected to an air conditioner 12 arranged in a space behind the ceiling. The boundary position P1 between the passage S13 and the atrium S12 corresponds to a position that should be the outer boundary of the air buffer area according to the present system.

The air conditioner 12 is connected to an office S11 through an air inlet 12a provided in a ceiling plate 21 in the office S11.
The air in the inside 11 is heated or cooled, and a built-in blower (not shown) blows out a jet F1 in a vertical direction from the air outlet 11 into the passage S13 through the variable damper 12b, thereby producing curtain-shaped air. It forms a shield layer.

The floor surface 22 is located near the inner boundary of the jet F1 from the air outlet 11, specifically at a position slightly below the air outlet 11 on the side of the office S11, such as a locker. Tall furniture 13 is installed side by side in a direction orthogonal to the cross section shown. This furniture 13
In addition to the original use purpose such as storage of clothes, it also has a function as a restraint barrier in the present system and a function as a blindfold between the passage S13 and the office S11.

On the floor 22, a handrail or fence 14 is provided at a boundary position P between the passage S13 and the atrium S12. This handrail or fence 14
In addition to the primary function of partitioning the atrium 13 from the atrium S12, the system also functions as a weir means at a position that should be the outer boundary of the air buffer in the present system.

In the above configuration, the jet F1 blown out from the air outlet 11 by the air conditioner 12 is cool air when the office S11 is cooled.
If it is heated, it is warm.

When the jet F1 reaches the height of the furniture 13 serving as a restraining barrier, it flows along the surface of the furniture 13 on the side of the passage S13 due to the Coanda effect, and collides with the floor surface 22.
A secondary airflow F2 along the floor 22 is obtained. Secondary airflow F
2 flows in the passage S13 toward the atrium S12 while the temperature gradually approaches the temperature of the atrium S12, and is raised by being blocked by a handrail or fence 14 as a weir means provided there.

The flow of air as described above is formed in the passage S13 between the row of furniture 13 and the handrail or fence 14, so that the entire passage S13 becomes the office S1.
1 and acts as an air buffer between the atrium S12. In the passage S13, there is a temperature gradient in which the temperature gradually approaches the temperature of the atrium S12 from near the row of the furniture 13 to near the handrail or the fence 14. For this reason,
In the vicinity of the handrail or fence 14, the temperature difference from the atrium S12 is small. Also, if the height of the handrail or fence 14 is about half of the height from the floor surface 22 to the ceiling plate 21,
This handrail or fence 14 has the same effect as the blow-up jet F4 by the blower 5 in FIG.
Ventilation can be effectively suppressed due to the temperature difference between
, Heat loss due to mixing of the secondary airflow F2 with the surrounding air can be suppressed.

Further, even in the vicinity of the row of furniture 13, the temperature difference between the jet F1 from the air outlet 11 and the surrounding air is small. Therefore, even when the jet F1 is warm, the buoyancy received from the surrounding air. And the jet F1 easily reaches the floor surface 22 in combination with the Coanda effect in the furniture 13. As a result, power consumption of the air conditioner 2 to the air outlet 1 can be reduced, and heat loss due to mixing of the jet F1 with surrounding air can be suppressed.

FIGS. 4A and 4B show the case where the temperature classification during heating is performed by the configuration of the above embodiment (A) and the case of FIG.
FIG. 6A shows a comparison of the results of measuring the temperature distribution in the space from the passage S13 to the office S11 in the case of performing the temperature classification during heating by the conventional method using the simplified air curtain of FIG. . From the results of this experiment, according to the conventional technology (B), the cold air of 19 ° C. enters from the lower part of the space, the cold area of 20 to 21 ° C. greatly spreads in the office S11, and the warm air from the air outlet is further increased. The warm region of 23 to 25 ° C. by blowing is distributed so as to crawl on the ceiling by buoyancy, and the temperature gradient in the vertical direction is large. On the other hand, in the case of the configuration (A) of the embodiment, due to the effect of the buffer area S13, the cold area does not enter the office S11, and the warm area of 23 to 25 ° C. in the office S11 reaches one near the floor. And the temperature gradient was small.

Also, the time required for the temperature in the office S11 to reach the set temperature is shorter than that of the prior art, that is, the superiority of the system of the present invention is confirmed also from the standpoint of heating start-up performance.

Next, FIG. 5 is a schematic structural explanatory view showing a second embodiment in which the air buffer system of the present invention is applied to a warehouse. The right side in this figure is an inner space to be divided by the air buffer. A certain warehouse space S21, and a left side is an entrance side space S22 which is an outer space.

In the case of a warehouse, the installation of a barrier or a weir means on the entrance / exit side hinders the entry and exit of people, vehicles, and the like. Is formed, and the inner rising surface 23a on the space S21 side in the warehouse functions as a restraint barrier, and the outer rising surface 23b on the entrance-side space S22 side is formed.
Function as weir means. The concave portion 23 is covered with a ventilation plate 24 made of a grating or a mesh plate having a required strength so as to allow passage of a person or a vehicle.

The inner rising surface 23a as a restraining barrier is
The outer rising surface 23b, which is formed near the inner boundary of the jet F1 from the air outlet 11 and more specifically, is located slightly closer to the space S21 in the warehouse than immediately below the air outlet 11, It is formed so as to be located closer to the entrance than the position just below the air outlet 11. Also, the outer rising surface 23
b, the air inlet 15 facing the lower space in the concave portion 23;
a and a blower 15 having an air outlet 15b facing vertically upward.

According to the structure shown in FIG.
When the jet flow F1 reaches the height of the floor surface 22, the jet flow F1 passes through the ventilation plate 24 and the inner rising surface 2 by the Coanda effect.
3a, enters the concave portion 23, flows into the concave portion 23 as a secondary airflow F2 toward the outer rising surface 23b,
There, it is blocked and blown up vertically by the blower 15 to form a jet F3.

Therefore, the air flow as described above allows the recess 2 to be formed in the same manner as in the first embodiment described above.
The entire space S23 directly above the space 3 functions as an air buffer between the warehouse space S21 and the entrance-side space S22.
The jet F3 from the blower 15 forms a kind of air shield layer, and the temperature difference between the outer space S2 and the outer space S2 is small near the outer rising surface 23b. Heat loss is effectively suppressed.

Next, FIG. 6 is a schematic structural explanatory view showing a third embodiment in which the air buffer system of the present invention is applied to a unloading space in a warehouse. A warehouse unloading space S21 'which is an inner space, and an entrance side space S22 which is an outer space on the left side. The floor surface on the unloading space S21 'side is a platform 25 higher than the entrance / exit side, and in this embodiment, the platform 25
The step surface 25a on the entrance side is used as a restraining barrier of the present system. The configuration of the other parts is shown in FIG.
Is the same as

In each of the embodiments described above,
Inlet 12a of air conditioner 12 that blows air to air outlet 11
Is installed in the inner space to be classified by the present system, that is, in the office S11, the warehouse space S21, or the unloading space S21 ′, and this is installed in the passage S13 serving as a buffer area or the space S23 on the concave portion. However, the same effect can be obtained.

[0041]

According to the air buffer system according to the first aspect of the present invention, the blowing speed of the jet from the air outlet can be reduced to a speed that can reach the constraining barrier by the Coanda effect in the constraining barrier. Thus, power consumption and noise can be reduced. Moreover, since the entire area between the restraining barrier and the dam means acts as an air buffer between the inner space and the outer space, it is possible to form an air shield that is not easily broken by disturbance such as the passage of a person or an object, Heat loss due to temperature difference ventilation is reduced.

According to the air buffer system of the second aspect of the present invention, by providing a blower that blows up the secondary airflow from the restricted barrier, the jet from the blower has the same function as the weir means in the first aspect. Since the entire area between the constraining barrier and the blower acts as an air buffer between the inner space and the outer space, it is possible to form an air shield that is not easily broken by disturbances such as the passage of a person or an object, and has a temperature difference. Heat loss due to ventilation is reduced.

According to the air buffer system according to the third aspect of the present invention, furniture, partitions, handrails, and the like can be used as restraint barriers and dams in the present system by appropriately arranging them. And so on.

According to the air buffer system of the fourth aspect, the restraining barrier and the weir means comprise the rising surface of the concave portion formed on the floor, and the concave portion is covered with the ventilation plate through which air can flow. Thus, since the buffer area is formed, the restraining barrier and the weir means do not hinder the passage of a person or a vehicle.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of an air buffer system according to the invention of claim 1;

FIG. 2 is an explanatory diagram showing a schematic configuration of an air buffer system according to the invention of claim 2;

FIG. 3 is a schematic configuration explanatory view showing a first embodiment in which the air buffer system of the present invention is applied to an open type atrium.

FIG. 4 shows the temperature distributions in the case of performing the temperature classification during heating according to the first embodiment (A) and in the case of performing the temperature classification during heating by a conventional method using a simplified air curtain (B). It is explanatory drawing which shows and compares the measured result.

FIG. 5 is a schematic configuration diagram showing a second embodiment in which the air buffer system of the present invention is applied to a warehouse.

FIG. 6 is a schematic configuration explanatory view showing a third embodiment in which the air buffer system of the present invention is applied to an unloading space in a warehouse.

FIGS. 7A and 7B schematically show a conventional air shield technique using an air curtain device, wherein FIG. 7A is a simplified air curtain device and FIG. 7B is a push-pull air curtain device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1,11 Air outlet 2,12 Air conditioner 3 Restriction barrier 4 Weir means 5,15 Blower 6,7 Wall surface 13 Furniture (Restriction barrier) 14 Handrail or fence (Weir means) 21 Ceiling board (wall surface) 22 Floor surface (wall surface) 23) recessed portion 23a inner rising surface (restricted barrier) 23b outer rising surface (retaining means) 24 ventilation plate 25a stepped surface (restricted barrier) F1 jet F2 secondary airflow F3 jet S1 inner space S2 outer space S3 air buffer area S11 office ( Inner space) S12 Atrium (outer space) S13 Passage (air buffer area) S21 Warehouse inner space (inner space) S22 Entrance / exit side space (outer space) S23 Recessed upper space (air buffer area)

Claims (4)

[Claims] 1. An air outlet provided on one wall surface and located inside a position to be an outer boundary of an air buffer and connected to an air conditioner, and an air outlet provided on the other wall surface facing the one wall surface. A restricting barrier provided near the inner boundary of the jet from the air outlet, and a weir provided on the other wall surface and blocking the secondary airflow from the restricting barrier at a position to be the outer boundary of the air buffer And an air buffer system. 2. An air outlet connected to an air conditioner, which is provided on one wall surface inside a position to be an outer boundary of the air buffer, and an air outlet provided on the other wall surface facing the one wall surface. A constraining barrier provided near the inner boundary of the jet from the air outlet, and the secondary airflow from the constraining barrier provided on the other wall surface at a position to be the outer boundary of the air buffer. An air buffer system comprising a blower for blowing air toward a wall surface. 3. The other wall surface is a floor surface, and the restraining barrier and the weir means are formed by furniture, a screen, a handrail, or the like installed on the floor surface.
An air buffer system according to claim 1. 4. The other wall surface is a floor surface, wherein the restraining barrier and the weir means comprise rising surfaces of recesses formed in the floor surface, and the recesses are covered with a ventilation plate through which air can flow. The air buffer system according to claim 1, wherein: