JP2009264638A - Floor blowing type air conditioner - Google Patents

Abstract

An inexpensive floor blowing type air conditioner that can prevent inflow of outside air from outside an air conditioning target area such as an open space and that does not impair the ceiling design.
In a floor blowing type air conditioner that air-conditions an air-conditioning target area on the floor surface 36 by blowing air-conditioned air upward from a plurality of blow holes 30 or a breathable carpet provided in the floor surface 36. The air curtain forming means 34 is provided below the boundary 16 inside and outside the air-conditioning target area and blows air upward to block the inside and outside of the air-conditioning target area with an air flow.
[Selection] Figure 1

Description

  The present invention uses an air-conditioning duct between a double floor laid on a floor slab and a floor slab as an air conditioning duct in an office building or the like. The present invention relates to a floor blowing type air conditioner that performs air conditioning by blowing air conditioned air toward, and particularly relates to a floor blowing type air conditioner that prevents inflow of outside air from outside an air conditioning target area such as an open space.

  2. Description of the Related Art Conventionally, in buildings such as office buildings, a so-called floor blowing type air conditioner or an air conditioning method is known that performs indoor air conditioning by blowing conditioned air from a floor surface toward a room on the floor (see, for example, Patent Document 1). ).

  Such a floor blowing type air conditioner or air conditioning method lays a double floor in which a number of blowout holes are formed on a floor slab, and air-conditioning ducts in the space formed between the floor slab and the double floor It is used as. The conditioned air in the duct is allowed to bleed out from the blowout holes or the air permeable carpet onto the floor at a low speed so as to perform air conditioning in the floor room.

  On the other hand, in recent buildings such as office buildings, an open space such as an atrium structure has been provided in order to enhance the feeling of opening (see, for example, Patent Document 2). Such an open space is usually arranged adjacent to a living space so that it can be seen from a living room space such as an office or a living room.

  In such an arrangement layout, when the living room space is air-conditioned by the floor blowing method, a relatively high temperature outside air or air in the open space may enter the living space from the opening at the boundary with the living space. The outside air or air that enters the air acts to increase the vertical temperature difference in the living space or to disturb the airflow of the conditioned air that is blown off from the floor surface in a low speed state. For this reason, a desired air conditioning state cannot be realized in the room, and people in the living space may feel uncomfortable. As a solution to such a problem, for example, an apparatus or an air conditioning method shown in FIG. 6 is known.

  As shown in FIG. 6, an open space 1 and a living space 2 that is air-conditioned by a full-surface floor blowing method are disposed adjacent to each other in a building 3. In general, the interior of an open room has many glass surfaces, so the upper part tends to be hot. A handrail panel 4 is installed at the left end of the living space 2 so as to define a boundary with the open space 1. The open space 1 and the living space 2 are provided between the handrail panel 4 and the ceiling surface 5 of the living space 2. Is formed. In this configuration, an air outlet 7 is provided on the ceiling surface 5 near the boundary with the open space 1, and an air curtain 8 is formed in the opening 6 by blowing air downward, and flows in from the open space 1 through the opening 6. The outside air 9 (high temperature air) to be tried is shut off.

JP 2003-247733 A Japanese Utility Model Publication No. 5-10935

  By the way, in recent years, a living space combining a ceiling-less design and a floor blowing type air conditioning has been used. The main reason why this combination is used is that it is possible to air-condition the room by using an air conditioning duct under the floor as well, so it is not necessary to install air supply equipment for air conditioning on the ceiling side. This is because it has the advantage of being suitable for the concept of ceiling design, which aims to eliminate as much as possible, and the advantage of reducing the construction cost by keeping the floor height low. For this reason, in this combination, as in the above-described conventional technology, the structure of providing an auxiliary facility such as an air outlet or a duct on the ceiling side to form an air curtain impairs the ceiling design. It is difficult and will increase the floor height.

  Also, in floor blowing type air conditioning where air supply equipment is arranged on the floor side, as in the conventional technology above, dedicated to the ceiling side away from the floor surface to form an air curtain that blocks the inflow of outside air Arranging these air supply facilities causes an increase in equipment costs.

  Furthermore, in the floor blow-off type air conditioning, air conditioning is performed by blowing extremely low-speed conditioned air upward from the floor surface, so the flow rate of the conditioned air in the living space is very small. Therefore, if the airflow is blown down downward from the air outlet provided on the ceiling side in order to form the air curtain as in the prior art described above, the airflow for air conditioning in the living space is disturbed. For this reason, it becomes a factor which causes the malfunction of an air-conditioning state, such as a vertical temperature difference arises indoors. Conversely, if air is blown out from the air outlet on the ceiling side at low speed so as not to disturb the air-conditioning airflow in the living space, the air volume forming the air curtain becomes insufficient and the air from the open space It may allow intrusion of outside air.

  The present invention has been made in view of the above circumstances, and an inexpensive floor blowout type air conditioner that can prevent the inflow of outside air from outside the air-conditioning target area such as an open space and does not impair the ceiling design. The purpose is to provide.

  In order to achieve the above object, a floor blowing type air conditioner according to claim 1 of the present invention is characterized in that the conditioned air is blown upward from a plurality of blowing holes or breathable carpets provided on the floor surface. A floor blowing type air conditioner for air-conditioning an air-conditioning target area on a floor surface, provided below a boundary between the air-conditioning target area and an open semi-air-conditioned or non-air-conditioned space, and blowing air upward An air curtain forming means for blocking the inside and outside of the target area with an air flow is provided.

  The floor blowing type air conditioner according to claim 2 of the present invention is the above-described floor blow-type air conditioner, wherein the wall surface having a top end portion is provided on the floor surface, and the air curtain forming means includes the wall body. An air outlet is provided in the vicinity and blows air upward.

  According to a third aspect of the present invention, there is provided a floor blowing type air conditioner according to the second aspect, wherein the air outlet is provided on the floor near the lower end of the wall body and is ejected from the air outlet. The air to be flowed upwards along the surface of the wall body.

  Moreover, the floor blow-off type air conditioner according to claim 4 of the present invention is characterized in that, in the above-described claim 3, the portion of the wall surface adjacent to the air outlet is formed in a substantially flat shape. .

  The floor blowing type air conditioner according to claim 5 of the present invention is the floor blowout type air conditioner according to any one of claims 2 to 4, wherein the wall body is a handrail panel, and the grip portion of the handrail is It is provided above a predetermined distance from the air outlet.

  The floor blowout type air conditioner according to claim 6 of the present invention is characterized in that, in claim 2 described above, the air outlet is provided at the top end of the wall.

  According to claim 7 of the present invention, the floor blowout type air conditioner according to claim 6 is configured such that the wall body includes two plate-like members arranged to face each other, and the air outlet is And communicating with a space formed between the two plate-like members.

  According to claim 8 of the present invention, in the floor blowout type air conditioner according to any one of claims 2 to 7, the air outlet is an conditioned air passage provided below the floor surface. It is characterized by communication.

  According to a ninth aspect of the present invention, in the floor blowout type air conditioner according to any one of the second to eighth aspects, the air outlet is formed in a slit shape, and the slit width is substantially the same. It is set to 5 to 25 mm, and the blowing flow velocity at the air outlet is approximately 2.5 to 6 m / s.

  According to the present invention, the air curtain forming means provided below the boundary between the inside and outside of the air conditioning target area shuts off the inside and outside of the air conditioning target area with the air flow by blowing air upward. Inflow of outside air into the air conditioning target area can be prevented. In addition, since there is no need to provide an air outlet for forming an air curtain on the ceiling side, it is not necessary to provide ancillary facilities associated with the air outlet such as an air duct on the ceiling side. For this reason, inflow of outside air can be prevented at low cost without impairing the ceiling design.

  Exemplary embodiments of a floor blowing type air conditioner according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic side sectional view showing an example of an embodiment of a floor blowing type air conditioner according to the present invention, and FIG. 2 is a schematic perspective view of FIG.

  As shown in FIGS. 1 and 2, in a building 10 such as an office building, an office living space 12 and an open space 14 by an atrium are provided adjacent to each other. In the living space 12, a handrail panel 18 is provided on the boundary 16 side with the open space 14, and an opening 22 that connects the open space 14 and the living space 12 is formed between the upper end of the handrail panel 18 and the ceiling surface 20. The

  The floor blowing type air conditioner 100 according to the present invention is an apparatus that air-conditions the living space 12 as an air-conditioning target area by the floor blowing type, and is provided on the floor 24 side of the living space 12 and supplies conditioned air by an air conditioning blower (not shown). The air-conditioning air passage 26 to be fed and a large number of small air holes 30 or air-permeable carpets that are formed on the entire surface of the floor panel 28 and for blowing the air-conditioned air into the living space 12 are configured. Further, the floor blowing type air conditioner 100 includes an air outlet 34 as an air curtain forming means for forming an air curtain 32 in the opening 22 of the boundary 16 on the floor surface 36 near the lower end of the handrail panel 18.

  The air outlet 34 is for forming the air curtain 32 by the air flow in the opening 22, and is formed in the floor surface 36 as an elongated slit-like long hole along the lower end of the handrail panel 18. The air outlet 34 communicates with the conditioned air passage 26 below the floor surface 36 so that conditioned air fed into the conditioned air passage 26 from an air conditioning blower (not shown) can be blown upward from the floor surface 36. . The blown airflow reaches the ceiling surface 20 of the living space 12. Thereby, the air curtain 32 is formed in the opening 22 formed between the upper end of the handrail panel 18 and the ceiling surface 20. In this way, communication between the open space 14 outside the air-conditioning target area and the living space 12 inside the air-conditioning target is blocked, and the inflow of outside air 38 from the open space 14 can be prevented. .

  Further, the air outlet 34 is provided on the floor surface 36 close to the handrail panel 18, and the air blown from here is easily along the side surface 40 of the handrail panel 18. For this reason, the airflow blown upward from the air outlet 34 is sucked to the handrail panel surface 40 by the so-called Coanda effect. And since this airflow flows so that it may be guided to the handrail panel surface 40, it raises in the aspect which is hard to spread | diffuse to the circumference | surroundings, and is maintained at a faster speed than the case where the blower outlet 34 is separated from the handrail panel surface 40. For this reason, an airflow can be efficiently reached to the ceiling surface 20. If this is demonstrated using FIG. 3, it will become flow velocity distribution that the airflow speed above the air blower outlet 34 is large, and the airflow speed on the open area side in the living space 12 is small.

  In this case, the reach distance of the airflow from the air outlet 34 flows upward at a flow velocity about 1.4 times greater than the reach distance of the airflow for air conditioning blown out from the blowout hole 30 at a low speed. I know that. In this way, in the present invention, the air outlet 34 is provided close to the handrail panel 18 with the aim of inducing the Coanda effect, and the blowout necessary to block the opening 22 with the air curtain 32 having a sufficient air volume. The air volume can be made smaller. Since the air volume above the handrail panel 18 can be reduced, it is possible to reduce exposure of a person in the vicinity of the handrail panel 18 to the vigorous wind, and as a result, the range of exposure to the vigorous wind is reduced, thereby reducing the discomfort. be able to.

  The conditioned air passage 26 is an air passage defined by a space formed between the floor slab 42 of the living space 12 and the double floor 44 laid on the floor slab 42, and is provided by an air conditioning blower (not shown). Air-conditioned air adjusted to low or high temperature is being sent. The double floor 44 is constructed by stacking a breathable tile carpet 46 and a floor panel 28 from above and below. The conditioned air sent into the conditioned air passage 26 oozes at a very low speed from the numerous blow holes 30 or the air permeable carpet on the entire surface of the floor panel 28, thereby realizing a desired air-conditioned state in the living space 12. It has become so.

  The handrail panel 18 is a substantially flat panel having a top end and extending vertically, and is provided on the floor surface 36 of the living space 12 near the boundary 16. The handrail panel 18 has a wall structure that does not have an opening in order to prevent leakage of conditioned air from the living space 12 to be air-conditioned, and the side surface 40 of the panel 18 is substantially flat in order to facilitate the flow along this. It is formed in a shape. On the upper part of the handrail panel 18 on the side of the living space 12, a grip bar 48 as a grip portion is provided so as to extend in a substantially horizontal direction so as to be convenient for a person to move. The grip bar 48 is attached to the handrail panel 18 by a plurality of arm-shaped attachment members 50 arranged at predetermined intervals, and the airflow from the air outlet 34 of the bottom surface 36 of the handrail panel 18 is changed between the attachment member 50 and the handrail panel. 18 and the upper opening 22 can be reached through the space surrounded by the grip bar 48.

The operation and action of the above configuration will be described.
When conditioned air is blown upward from an air outlet 34 provided on the floor surface 36 so as to approach the lower end of the handrail panel 18, this airflow is drawn upward to the side surface 40 of the handrail panel 18 due to the Coanda effect. Flowing. Since this airflow is guided to the handrail panel side surface 40, it flows upward in a manner that it is difficult to diffuse around. Then, the air curtain 32 is formed in the opening 22 above the handrail panel 18 and reaches the ceiling surface 20. By forming the upward air curtain 32 in the opening 22, the communication of the airflow between the open space 14 and the living space 12 is blocked. Thereby, it is possible to prevent the outside air 38 from entering the living space 12 from the open space 14 through the opening 22.

  Thus, since it is not necessary to provide the air outlet 34 for forming the air curtain 32 in the ceiling surface 20, it is not necessary to provide a ventilation duct in the ceiling surface 20 side. This does not damage the ceiling design. For example, even if the living space 12 has a ceiling-less design, it can be easily applied, which contributes to an improvement in the degree of freedom in designing the ceiling side. Furthermore, an increase in initial cost due to the provision of an air supply duct or the like on the ceiling surface 20 side can be avoided.

  Moreover, since the direction of the airflow for forming the air curtain 32 and the direction of the airflow for air-conditioning the living space 12 coincide with the upward direction, the airflow for forming the air curtain 32 flows in the living space 12. The possibility of disturbing the air-conditioning airflow can be reduced.

  In the above embodiment, the handrail panel 18 has been described as being constituted by a single substantially flat panel, but instead of doing this, as shown in FIG. A double handrail panel structure is formed by the two plate-like members 52a and 52b, a space 54 formed by being sandwiched by the two plate-like members 52a and 52b, and an air-conditioned air passage for air conditioning under the floor 36 26 may be in a communication state. In this case, the conditioned air passing through the conditioned air passage 26 is guided to the space 54 sandwiched between the two plate-like members 52a and 52b, and the conditioned air is directed upward from the air outlet 58 formed at the upper end of the handrail panel. By blowing out, the air curtain 32 can be formed in the opening 22 above.

  In this case, what is considered is not the Coanda effect described in the above embodiment, but the air outlet 58 is placed at the upper end of the handrail panel so that the airflow blowing position is arranged closer to the ceiling. It aims to form an efficient air curtain. By doing so, the airflow is less likely to be diffused compared to the case where the air outlet 34 is provided on the floor surface 36 at the lower end of the handrail panel 18 as in the above embodiment, and the airflow reaches the ceiling surface 20 more reliably. It can be efficient. In this case, it is possible to reduce the air volume necessary for forming the air curtain 32 sufficient to block the opening 22.

In the above-described embodiment, the blowing air speed at the air outlets 34 and 58 for forming the air curtain 32 having an air volume sufficient to block the inflow of outside air at the opening 22 is the slit width of the air outlets 34 and 58, It can be determined by the height from the air outlets 34, 58 to the ceiling surface 20, the outside air temperature of the open space 14, and the like. In this case, for example, the slit width of the air outlet 34 may be set to 5 to 25 mm, and the blowing air speed from the slit may be set to 2.5 to 6.0 m / s or the like. In this case, as shown in the relationship diagram of the slit width and the blowing air speed in FIG. 5, the air volume per unit length is 170 m ³ / h / m or more in the case of the floor air outlet, and in the case of the handrail upper end air outlet. Can be 150 m ³ / h / m or more.

  In the above embodiment, instead of providing the air outlet 34 for forming the air curtain 32 at a position close to the lower end of the handrail panel 18, air may be provided in the upper opening 22 even if it is provided away from the lower end of the handrail panel 18. A curtain 32 can be formed. However, since the effect in this case is considered not to exhibit much Coanda effect as compared with the case where it is provided close to the lower end of the handrail panel 18 as in the above embodiment, the shape size of the living space 12 and the performance of the air conditioning blower Or, depending on the outside air temperature in the open space 14 or the like, it is considered that a larger blowing air speed or slit width is required. For this reason, regarding the setting of the installation position of the air outlet 34 and the like, the blowout wind speed, and the like, it is desirable to examine in advance through experiments and numerical simulation and select appropriate specifications.

  In the above embodiment, the air outlet 34 has been described as one slit-like continuous long hole provided in the floor surface 36. Instead of doing this, a plurality of slit-like long holes are provided in the floor. It may be provided on the surface 36, or the air from the conditioned air passage 26 may be guided to the height of the approximate center of the handrail panel 18, and the air may be blown upward from there. The same effects as the present invention can be achieved.

It is a schematic sectional side view which shows an example of embodiment of the floor blowing type | formula air conditioner which concerns on this invention. It is a schematic perspective view which shows an example of embodiment of the floor blowing type | formula air conditioner which concerns on this invention. It is a schematic side view which shows an example of the flow-velocity distribution in the living space by the floor blowing type | formula air conditioner which concerns on this invention. It is a schematic sectional side view which shows an example of other embodiment of the floor blowing type | formula air conditioner which concerns on this invention. It is a graph which shows an example of the relationship between the slit width | variety of the floor blowing type | formula air conditioner which concerns on this invention, a blowing wind speed, and an air volume. It is a schematic sectional side view which shows an example of the conventional floor blowing system air conditioner.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Building 12 Living space 14 Open space 18 Handrail panel 20 Ceiling surface 22 Opening 26 Air-conditioning air passage 30 Air outlet (or air-permeable carpet)
32 Air curtain 34 Air outlet 36 Floor surface 38 Outside air 40 Side surface 48 Grasping rod 52a, 52b Plate-like member 100 Floor blowing type air conditioner

Claims (9)

A floor blowing type air conditioner that performs air conditioning of an air-conditioning target area on the floor surface by blowing air conditioned air upward from a plurality of blowout holes or breathable carpets provided on the floor surface,
The air curtain forming means is provided below a boundary between the air-conditioning target area and the open semi-air-conditioned or non-air-conditioned space, and blows air upward to block the inside and outside of the air-conditioning target area with an air flow. Floor blowing type air conditioner.   The wall surface having a top end portion is provided on the floor surface, and the air curtain forming means is provided in the vicinity of the wall body and includes an air outlet for blowing air upward. The floor blowing type air conditioner described.   The said air blower outlet is provided in the said floor surface of the lower end vicinity of the said wall body, and flows the air spouted from the said air blower outlet upward along the surface of the said wall body. The floor blowing type air conditioner described in 1.   The floor blowing type air conditioner according to claim 3, wherein a portion of the wall surface adjacent to the air outlet is formed in a substantially flat shape.   The floor according to any one of claims 2 to 4, wherein the wall body is a handrail panel, and a grip portion of the handrail is provided above a predetermined distance from the air outlet. Air blower type air conditioner.   The floor blowout type air conditioner according to claim 2, wherein the air outlet is provided at a top end portion of the wall body.   The wall body includes two plate-like members arranged to face each other, and the air outlet communicates with a space formed between the two plate-like members. Item 7. The floor blowout type air conditioner according to Item 6.   The floor blowout type air conditioner according to any one of claims 2 to 7, wherein the air blowout port communicates with an conditioned air passage provided below the floor surface.   The said air blower outlet is formed in slit shape, the said slit width is made into about 5-25 mm, and the blowing flow velocity in the said air blower outlet is made into about 2.5-6 m / s, It is characterized by the above-mentioned. The floor blowing type air conditioner according to claim 8.

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