JP7426865B2 - blowout chamber - Google Patents

Description

The present invention relates to a wall-mounted blow-off chamber having a bag-like filter inside the chamber body, and particularly to a wall-mounted blow-off chamber for temperature stratified air conditioning.

When air conditioning is used in buildings with high ceiling heights, instead of using the mixed-dilution air conditioning method that diffuses conditioned air (hereinafter referred to as conditioned air) throughout the room, the buoyancy of the high-temperature air is used to reduce the high temperature in the upper part of the space. Stratification is created based on the difference in air density between the area and the lower low-temperature area, and in summer, for example, the area where many people are present (for example, the lower low-temperature area within a range of about 2 meters above the floor) can be used with conditioned air. Temperature stratified air conditioning methods may be adopted to meet the requirements. By actively exhausting the air that remains in the high temperature area at the top of the space and circulating the air in the middle and bottom as return air, there is no need to cool the high temperature air in the high temperature area, so compared to the mixed dilution air conditioning method. However, temperature stratified air conditioning is easier to save energy.

In temperature stratified air conditioning, it is necessary to supply conditioned air slowly in order to form layers of conditioned air and not to disturb the formed layers. Therefore, in Patent Documents 1 and 2, instead of blowing out the conditioned air sent from the duct as it is, it is blown out through a chamber having a sufficiently large capacity and outlet for the amount of conditioned air, thereby weakening the blowing wind speed. . In particular, in Patent Documents 1 and 2, a sock duct or a bag filter is connected to the duct, and a ventilation panel (a louver chamber, a diffuser plate) is attached to the air outlet provided on the front or side of the chamber, so the air outlet It is possible to supply air that seems to seep out from the entire area.

Patent No. 5087688 Patent No. 2862149

By the way, in Patent Documents 1 and 2, the ventilation holes (openings) provided in the ventilation panel (side panel or diffuser plate) are uniform over the entire surface, and the blowing resistance is uniform over the entire surface. However, when we prototyped a blow-off unit with the same structure and divided the ventilation panel of the blow-off port into a grid pattern and measured the blow-out air speed in each section, we found that the blow-out speed varied depending on the section, and unnecessary air flow was generated from unintended areas. It turned out that the conditioned air was blowing out.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a blowing chamber that can suppress unnecessary blowing from unintended portions.

The blowing chamber of the present invention includes a chamber body 10 having an air supply inlet 11a and an air outlet 121a, and a bag-shaped filter 20 disposed within the chamber body 10 and attached to the air supply inlet 11a. , the air outlet 121a is provided on a plane substantially parallel to the direction in which the supplied air is introduced and opens laterally, and the air outlet 121a is characterized in that the air resistance of the air outlet 121a is varied depending on the region.

In the above-mentioned blowing chamber, the blowing resistance of a separate portion 121a1 that is distant from the supply air introduction port 11a in the direction of supply air introduction is greater than the blowing resistance of a neighboring portion 121a2 that is close to the supply air introduction port 11a. is preferred.

Further, it is preferable that an air resistance material 16 is attached to the separated portion 121a1. Furthermore, it is preferable that the length ratio of the separated portion 121a1 and the adjacent portion 121a2 in the direction of introduction of the supply air is approximately 2:1. Furthermore, it is preferable that the flow path area of the bag-shaped filter 20 decreases toward the tip.

In the blowing chamber of the present invention, by varying the blowing resistance of the blowing outlet depending on the part, the blowing resistance of the part where excessive blowing is occurring can be made relatively larger than that of other parts, thereby eliminating unnecessary blowing. can be suppressed.

If air resistance material is installed, etc., and the blowing resistance of a space away from the supply air inlet in the direction of supply air introduction is greater than the blowing resistance of a nearby part close to the supply air inlet, Unnecessary blowing out at the separated parts can be suppressed. In other words, for example, with bag-shaped filters such as sock ducts and bag filters, the amount of air discharged from the end tends to be larger than from other parts, so if the blowing resistance is uniform over the entire surface of the blowing outlet, it will be difficult to Although the amount of blowing increases, this effect can be reduced by making the blowing resistance of the separated parts relatively large.

When the length ratio between the separated portion and the adjacent portion in the direction of introduction of the supply air is approximately 2:1, it is possible to achieve a well-balanced blowout wind speed throughout the blowout port.

When the flow path area of the bag-shaped filter decreases toward the tip, it is possible to suppress the tendency for the amount of discharge from the end to increase.

FIG. 1 is an exploded perspective view of a blowing chamber according to an embodiment of the present invention. FIG. 2 is a perspective view of the blowout chamber of FIG. 1; FIG. 3 is a cross-sectional view of the blowout chamber of FIG. 2; FIG. 7 is a cross-sectional view of a blowing chamber according to another embodiment. FIG. 5A is a diagram showing experimental results, with FIG. 5A showing an example and FIG. 5B showing a comparative example.

Next, one embodiment of the blowing chamber of the present invention will be described in detail based on the drawings. The blowing chamber 1 of the present invention is a wall-mounted chamber for heating and cooling for temperature stratified air conditioning, and as shown in FIGS. It is equipped with

The chamber body 10 has a hollow rectangular parallelepiped shape, and has a bottom portion 11 that is rectangular in plan view, side wall portions 12 rising from four sides of the bottom portion 11, and an upper portion 13 that closes the upper end of the side wall portion 12. The side wall portion 12 includes a front portion 121 and a back portion 122 rising from the long sides of the bottom portion 11, and two side portions 123 rising from the short sides of the bottom portion 11. The front part 121 and the two side parts 123 are each provided with an outlet 121a that opens laterally for blowing out conditioned air. The air outlet 121a is provided over almost the entire surface of the front part 121 and the side part 123. Therefore, it can be said that the chamber main body 10 is composed of a bottom part 11, a back part 122, and an upper part 13, and has air outlets 121a on the front and both sides.

As shown in FIG. 1, the air outlet 121a is partitioned by a crosspiece 14. Specifically, the front part 121 is provided with one vertical bar 141 and one horizontal bar 142, and each side part 123 is provided with one horizontal bar 142. The vertical bar 141 is located approximately at the center of the front part 121, and the horizontal bar 142 is located at the first height from the bottom when the air outlet 121a is divided into three in the height direction. A ventilation member 15 is attached to each section divided by the crosspieces 14 (see FIG. 3). The ventilation material 15 is, for example, a resin net. For example, the average collection efficiency (mass method) is about 15 to 25%, and the initial pressure loss is 2.0 to 9.0 Pa at a wind speed of 1.5 m/s. Furthermore, an air resistance material 16 is attached to the upper section of each section. The air resistance material 16 is located upstream of the ventilation material 15. The air resistance material 16 is, for example, a nonwoven fabric. For example, the average collection efficiency (mass method) is about 50 to 70%, and the initial pressure loss is 20 to 90 Pa at a wind speed of 2.5 m/s. By attaching the air resistance material 16 to the upper section in this way, the blowing resistance of the upper section is greater than that of the lower section. The length ratio in the vertical direction of the portion where the blowing resistance is large and the portion where the blowing resistance is small is approximately 2:1. In addition, in the upper left section when the chamber main body 10 is viewed from the front, a ventilation material 15 and an air resistance material 16 are detachably attached to the crosspiece 14. Specifically, the ventilation material 15 and the air resistance material 16 are attached to the crosspiece 14 via a frame material 17 having the same shape as the partition.

Incidentally, an air supply inlet 11 a is provided approximately at the center of the bottom portion 11 for introducing conditioned air from the air supply duct 30 into the chamber body 10 . Further, a flange is provided to frame the air supply inlet 11a (see FIG. 3). The flange 11b extending outside the chamber body 10 is for connecting the air supply duct 30, and the flange 11c extending inside the chamber body 10 is for connecting the bag-shaped filter 20.

The bag-shaped filter 20 has a hollow triangular prism shape, and is disposed in the chamber body 10 with its triangular surface (side gusset) facing the inner surface of the side surface 123 of the chamber body 10. The lower end of the bag-shaped filter 20 is open and connected to the flange 11c. The upper end is closed and fixed to the upper part 13 of the chamber body 10. Therefore, it can be said that this bag-shaped filter 20 extends from the bottom to the top, and the air outlet 121a can be said to be provided in a plane substantially parallel to the direction in which the bag-shaped filter 20 extends. Note that since the air supply is performed from the bottom to the top, it can be said that the air outlet 121a is provided on a plane substantially parallel to the introduction direction of the air supply (the white arrow in FIGS. 2 and 3). As can be seen from the substantially triangular side view shape of the bag-like filter 20, the flow path area of the bag-like filter 20 becomes smaller toward the end (tip). The rate of decrease is almost uniform. The length of the bag-shaped filter 20 in the vertical direction is approximately the same as the height of the air outlet 121a. The bag-shaped filter 20 is made of nonwoven fabric. Therefore, the bag-shaped filter 20 can also be said to be a flat nonwoven fabric bag with side gussets. The nonwoven fabric has, for example, an average collection efficiency (mass method) of 50 to 70%, an initial pressure loss of 20 to 90 Pa at a wind speed of 2.5 m/s, and is the same as the air resistance material 16, but with different Good too.

The blowing chamber 1 having the above configuration is used by connecting the air supply duct 30 to the flange 11b. When the conditioned air is supplied from the air supply duct 30 during use, the conditioned air is slowly discharged into the chamber body 10 through the bag-shaped filter 20, but the discharge amount from the end of the bag-shaped filter 20 is distributed to other parts. If no countermeasures are taken, a large amount of conditioned air will be drawn from the upper part of the air outlet 121a (separated part 121a1 that is away from the supply air inlet 11a in the direction of supply air introduction). I burst out laughing. Dynamic pressure is applied to the inside of the air supply duct 30 connected to the flange 11b by a fan of an air conditioner (not shown), and the static pressure is converted by the bag-shaped filter 20 at the end of the air supply duct 30, and the air is transferred from the nonwoven fabric to the direction. This is because the dynamic pressure of the converted material remains at the end, creating a feeling of blowing through. In this regard, in the blowing chamber 1 having the above configuration, by attaching the air resistance material 16 to the upper section which is the separated portion 121a1, the blowing resistance of the upper section is reduced to the lower section (nearby portion near the air supply inlet 11a). 121a2), even if a large amount of conditioned air is discharged from the end of the bag-shaped filter 20, unnecessary blowing out from the upper compartment can be suppressed. It is possible to reduce the unevenness of the blowing wind speed. Therefore, it can be suitably used as a blowing chamber for temperature stratified air conditioning.

As shown in FIG. 3, the blowing chamber 1 may be installed in a recess provided in a wall surface 31 of a building. In this case, since the blowing chamber 1 is accommodated within the wall surface 31, the blowing chamber 1 does not become an obstacle for indoor users. Moreover, if a louver 33 is installed in front of the blow-off chamber 1, air conditioning can be performed while hiding the blow-off chamber 1. However, the back portion 122 may be installed along the wall surface 31. In this case, there is no need to provide a depression in the wall surface 31. It is preferable that the air supply duct 30 is drawn in from a vertical hole provided in the floor surface 32.

FIG. 4 shows a blowing chamber 1A according to a different embodiment. This blowing chamber 1A is provided with an air supply inlet 11a in the upper part 13 of the chamber body 10, and the bag-shaped filter 20 extends downward from the top. The horizontal bar 142 is located at the second height from the bottom when the air outlet 121a is divided into three parts in the height direction. Air resistance material 16 is attached to the lower compartment. That is, this is a state in which the blowing chamber 1 in FIG. 3 is upside down. Regarding this blowing chamber 1A, the blowing resistance of the lower section (separated portion 121a1) which is away from the supply air inlet 11a in the direction of supply air introduction is higher than that of the upper section (nearby portion 121a2) which is closer to the supply air inlet 11a. ) is larger than the blowing resistance of It is possible to reduce unevenness in the blowing wind speed in the introduction direction.

(Example)
FIG. 5A shows a blow-off chamber of the type (FIG. 4) in which air is supplied from above, in which the width of the chamber body 10 is 2480 mm, the height is 1800 mm, the depth is 620 mm (capacity approximately 2.77 m ³ ), and the width of the crosspiece 14 is is 80 mm, the total area of the air outlet 121a is approximately 5.49 m ² , the width of the air supply inlet 11a is 1304 mm, and the length in the depth direction is 304 mm. Filter PH3800-1 (average collection efficiency (mass method) 18%, initial pressure loss 5.6 Pa at wind speed 1.5 m/s) was used as the air resistance material 16 using a nonwoven fabric filter for coarse dust made by Nippon Vilene Co., Ltd. PS/150N (average collection efficiency (mass method) 63%, initial pressure loss 30 Pa at wind speed 2.5 m/s), using the same material as the air resistance material 16 as the bag-like filter 20, It is a figure showing the blowing wind speed when the volume is 6000 m ³ /h. Note that the ventilation resistance of the portion where the air resistance material 16 is present is increased by 65.8% compared to the portion where the air resistance material 16 is not present. The unit of numbers shown in the figure is m/s. Moreover, the blowing wind speed was measured at each of 12 points by dividing the front section 121 into 12 parts.

(Comparative example)
In addition, a comparative example was prepared under the same conditions as the above embodiment except that the air resistance material 16 was not provided. FIG. 5B is a diagram showing the blowing wind speed of a comparative example.

In the comparative example shown in FIG. 5B, the blowing wind speed is high on the lower side (separated area 121a1) that is far away from the air supply inlet 11a in the supply air introduction direction, while the upper side (near area 121a2) that is close to the air supply inlet 11a is high. ) is low, and the dispersion of the wind speed in the vertical direction is large. On the other hand, in the embodiment (FIG. 5A) in which the air resistance material 16 is provided on the lower side (separated part 121a1) that is away from the supply air inlet 11a in the supply air introduction direction, the variation in the blowing wind speed in the vertical direction can be seen to be suppressed.

Although the embodiments of this invention have been described above, this invention is not limited to the above embodiments, and can be implemented with various changes within the scope of this invention. For example, in the above embodiment, a resin net is used as the ventilation material 15, but a metal net may also be used. In addition to the net, a perforated panel or a louver in which a large number of holes are provided in a plate material may be used. Furthermore, the air resistance material 16 is not limited to non-woven fabric, and woven fabric may also be used. In addition, by not using the air resistance material 16 and varying the aperture ratio, pressure loss, average collection efficiency, etc. of the ventilation material 15 (net, perforated panel, louver) depending on the region, the blowout resistance of the separated region 121a1 can be reduced. The blowing resistance may be greater than that of the portion 121a2. Furthermore, the blowing resistance may be changed stepwise or continuously so that the blowing resistance increases as the distance from the air supply inlet 11a in the direction of introducing the air supply increases. Further, the length ratio of the portion where the blowing resistance is high to the portion where the blowing resistance is small is not limited to 2:1, but may be changed as appropriate.

In addition, in the above embodiment, the blowing resistance is increased at the separated portion 121a1 that is far away from the air supply inlet 11a in the direction of supply air introduction, but the blowing resistance is increased depending on the situation around the air outlet 121a. may be adjusted. For example, if there is a spectator seat or the like that is an obstacle to the air supply in front of the air outlet 121a, it is possible to increase the air flow resistance at the part facing the obstacle to reduce the amount of air that hits the obstacle. be. By reducing the amount of air supplied to the audience seats, where the supply air hits the seats and spectators and the air flows in various directions, disrupting temperature stratification, even if the air volume directly above is large, the difference in air density at the bottom of the target room is reduced. On the contrary, the temperature stratification caused by this is not disturbed and becomes good.

In another embodiment, the air supply inlet 11a may be provided on one of the two side surfaces 123. In this case, the side surface portion 123 is not provided with the air outlet 121a. Further, the separated portion 121a1 is on the other side surface portion 123 side, and the nearby portion 121a2 is on the one side surface portion 123 side.

1, 1A Blowout chamber 10 Chamber body 11 Bottom 11a Air supply inlet 11b Flange (for air supply duct connection)
11c Flange (for bag-shaped filter connection)
12 Side wall part 121 Front part 121a Air outlet 121a1 Separated part 121a2 Nearby part 122 Back part 123 Side part 13 Upper part 14 Crosspiece 141 Vertical crosspiece 142 Horizontal crosspiece 15 Ventilation material 16 Air resistance material 17 Frame material 20 Bag-shaped filter 30 Air supply duct 31 Building wall 32 Building floor 33 Louver

Claims (4)

a chamber body having an air supply inlet and an outlet to which a ventilation member is attached ;
a bag-shaped filter disposed within the chamber body and attached to the air supply inlet;
The air outlet is provided on a surface substantially parallel to the direction of introduction of the supply air and opens laterally,
By attaching an air resistance material to a spaced apart part of the air outlet that is away from the air supply inlet in the supply air introduction direction, the blowout resistance of the spaced part is reduced to a neighboring part close to the air supply inlet. It is said to be greater than the blowout resistance of
the air resistance material is located upstream of the ventilation material,
Since the bag-shaped filter has a hollow triangular prism shape and the side gussets are triangular, the flow path area becomes smaller toward the end, and the rate of decrease is almost uniform.
Blow chamber. The length ratio of the separated portion and the adjacent portion in the direction of introduction of the supply air is approximately 2:1;
The blowing chamber according to claim 1 . The ventilation material is a resin net, and the air resistance material is a nonwoven fabric.
The blowing chamber according to claim 1 or 2. The supply air introduction hole is provided at the bottom of the chamber body,
The separated part is an upper part of the air outlet,
The blowing chamber according to any one of claims 1 to 3.

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