JP6854098B2 - Air conditioning system - Google Patents

Description

The present invention relates to an air conditioning system that air-conditions an air-conditioned area.

In an air-conditioned area such as an office in an office building, the perimeter side, such as near a window facing the outside, is more susceptible to the outside air temperature than the interior side. Therefore, for example, when the outside air temperature is low such as in winter, the heating load on the perimeter side is larger than that on the interior side due to the influence of the low temperature outside air, and when the outside air temperature is high such as in summer, the perimeter side has high temperature outside air. Due to the influence, the cooling load is larger than that on the interior side, and the air conditioning load on the perimeter side tends to be larger than that on the interior side to counter the outside air temperature.
In addition, depending on the air-conditioning target area, a cooling load is generated throughout the year due to the concentration of heat sources such as OA equipment and office workers on the interior side, and air conditioning to counter the outside temperature throughout the year on the perimeter side. The type of air conditioning load may differ between the interior side and the perimeter side, such as a load (cooling load in summer and heating load in winter).
Therefore, in an air conditioning system that air-conditions a target area for air conditioning, it is often used to provide a perimeter air-conditioning system that air-conditions the perimeter side in addition to the interior air-conditioning system that air-conditions the interior side.

In such an air conditioning system, a natural ventilation facility that performs natural ventilation using wind power, a temperature difference, or the like as a driving force may be provided. In this case, the natural ventilation equipment is provided with an air supply port for supplying outside air to the air conditioning target area and an exhaust port for exhausting the air in the air conditioning target area to the outside facing the air conditioning target area. As shown in Patent Document 1, for example, the air supply port that supplies the outside air to the air-conditioning target area is the air-conditioning target of the wall portion that is the boundary between the outdoor and the air-conditioning target area, which has a short air supply path and low air supply resistance. It is installed on the upper part of the surface on the area side (the most perimeter side of the air conditioning target area).

Japanese Unexamined Patent Publication No. 08-210685

In the above-mentioned conventional air-conditioning system, when the natural ventilation equipment ventilates the air-conditioning target area, the wall portion on the perimeter side of the air-conditioning target area heated by the perimeter air-conditioning equipment in winter when the outside temperature is low. Since the low-temperature outside air is introduced from the upper part of the air-conditioning area, a natural drop of the low-temperature outside air (so-called cold draft) occurs on the perimeter side of the air-conditioned area, which causes discomfort to the person on the perimeter side.
In addition, in the summer when the outside temperature is high, high-temperature outside air is introduced from the upper part of the wall on the perimeter side of the air-conditioning target area that is cooled by the air-conditioning equipment for the perimeter, so the air-conditioning target area is covered throughout the year. Since the outside air in a temperature range opposite to the air conditioning load is directly introduced to the perimeter side, there is also the inconvenience of increasing the air conditioning load of the air conditioning equipment for the perimeter.

In view of this situation, a main object of the present invention is to provide an air conditioning system capable of performing natural ventilation by natural ventilation equipment while suppressing the occurrence of cold draft and the increase in air conditioning load of the air conditioning equipment for perimeter. ..

The first characteristic configuration of the present invention is an air-conditioning equipment for a perimeter that air-conditions the perimeter side of the air-conditioning target area, a natural ventilation equipment that performs natural ventilation in the air-conditioning target area, and an interior that air-conditions the interior side of the air-conditioning target area. Equipped with air conditioning equipment,
The air supply port of the natural ventilation equipment is on the interior side of the air-conditioning target area with respect to the air outlet of the air-conditioning equipment for the perimeter, and the air outlet of the air-conditioning equipment for the perimeter and the air outlet of the air-conditioning equipment for the interior. Placed in between
The exhaust port of the natural ventilation equipment is arranged on the side opposite to the air supply port of the natural ventilation equipment with respect to the air outlet of the interior air conditioning equipment.
The natural ventilation equipment supplies air to the air-conditioning target area from the air supply port arranged between the air outlet of the perimeter air-conditioning equipment and the air outlet of the interior air-conditioning equipment, and the interior air-conditioning equipment. There rows natural ventilation of the air-conditioning target area in a form exhausting from the exhaust port, wherein the natural ventilation of the air supply port is disposed opposite to the air outlet of,
The air-conditioning equipment for the perimeter and the air-conditioning equipment for the interior have different thermal environments according to the air-conditioning loads on the perimeter side and the interior side, even if the types of air-conditioning loads differ between the perimeter side and the interior side in the air-conditioning target area. Is an adjustable air conditioner,
The air conditioner for the perimeter adjusts the thermal environment on the perimeter side according to the heating load on the perimeter side in the air conditioning target area, and the air conditioner for the interior adjusts the thermal environment on the interior side according to the cooling load on the interior side in the air conditioning target area. The point is to adjust the thermal environment.

According to this configuration, when natural ventilation of the air-conditioning target area is performed by the natural ventilation equipment, the air-conditioning equipment for the perimeter is provided from the air supply port located on the interior side of the air-conditioning target area rather than the air outlet of the air-conditioning equipment for the perimeter. Since the outside air is introduced to the interior side of the air-conditioned area rather than the regulated air blown out from the air-conditioned area, the introduction of the outside air to the perimeter side of the air-conditioned area is suppressed and the introduction of the outside air to the interior side of the air-conditioned area is promoted. be able to.
Therefore, in winter when the outside air temperature is low, it is possible to suppress the natural drop of low temperature outside air (so-called cold draft) on the perimeter side of the air-conditioned area heated by the air-conditioning equipment for the perimeter. It is possible to reduce the discomfort to the person on the perimeter side.
In addition, since it is possible to suppress the introduction of outside air in a temperature range opposite to the air conditioning load to the perimeter side of the air conditioning target area throughout the year, it is possible to suppress an increase in the air conditioning load of the air conditioning equipment for the perimeter due to the introduced outside air. Can be done.
Therefore, it is possible to perform natural ventilation by the natural ventilation equipment while suppressing the occurrence of cold draft and the increase in the air conditioning load of the air conditioning equipment for the perimeter.

Furthermore, it is possible to expand the outside air conditions that can effectively use natural ventilation by suppressing the occurrence of cold drafts when natural ventilation is performed in the air-conditioned area with natural ventilation equipment and the increase in the air-conditioning load of the air-conditioning equipment for perimeters. it can. Therefore, it is possible to increase the chances of performing natural ventilation, and it is possible to promote energy saving by natural ventilation.

Moreover, since it is possible to promote the introduction of outside air to the interior side of the air-conditioned area when ventilating the air-conditioned area with the natural ventilation equipment, for example, the air-conditioned area is subject to air conditioning even though the outside temperature is low. When a cooling load is generated on the interior side of the area, it is possible to improve energy saving by cooling the outside air.

In addition, when natural ventilation of the air-conditioned area is performed by the natural ventilation equipment, from the air supply port of the natural ventilation equipment arranged between the air outlet of the air-conditioning equipment for the perimeter and the air outlet of the air-conditioning equipment for the interior. The introduced outside air can suppress the flow of air between the area on the interior side adjusted by the interior air-conditioning equipment and the area on the perimeter side adjusted by the perimeter air-conditioning equipment.
Therefore, when the type of air conditioning load differs between the perimeter side and the interior side of the air conditioning target area, the air conditioning on the perimeter side (for example, heating) by the air conditioning equipment for the perimeter and the air conditioning on the interior side (for example, cooling) by the air conditioning equipment for the interior the mixing losses (mixing losses) can be efficiently performed while suppressing the, Ru can be further improved energy efficiency.

The second characteristic configuration of the present invention is installed in a state where the air supply port of the natural ventilation equipment supplies air sideways from a portion on the interior side of the air outlet of the perimeter air conditioning equipment toward the interior side. There is a point.

According to this configuration, when natural ventilation of the air-conditioned area is performed by the natural ventilation equipment, the introduction of outside air to the perimeter side, which is the back side of the air supply port of the natural ventilation equipment, is further suppressed, and the air supply port is opened. The introduction of outside air to the interior side, which is the front side, can be further promoted.
Furthermore, if the air supply port of the natural ventilation equipment is supplied sideways from near the horizontal plane such as the ceiling surface toward the interior side, the air supply flow tends to be along the horizontal plane due to the Counder effect. , The introduction of outside air to the interior side can be further promoted while further suppressing the introduction of outside air to the perimeter side.
Therefore, it is possible to further suppress the occurrence of cold draft and the increase in the air conditioning load of the air conditioning equipment for the perimeter when the natural ventilation equipment ventilates the air-conditioned area. In addition, the outside air conditions under which natural ventilation can be effectively used can be further expanded to further promote energy saving by natural ventilation, and energy saving by outside air cooling can be further improved.

The third characteristic configuration of the present invention includes a perimeter air-conditioning equipment that air-conditions the perimeter side of the air-conditioning target area and a natural ventilation equipment that naturally ventilates the air-conditioning target area.
The air supply port of the natural ventilation equipment is arranged on the interior side of the air conditioning target area with respect to the air outlet of the air conditioning equipment for the perimeter.
On the ceiling side of the air-conditioned area, the air supply flow path from the outside air intake port to the air supply port in the natural ventilation facility is provided with a bent portion that bends upward and then downward.
The point is that the air conditioner for the perimeter is installed in the recessed space below the bent portion.

According to the above configuration, the portion bent above the bent portion of the air supply flow path for arranging the air supply port of the natural ventilation equipment on the interior side of the air supply port of the air conditioner for the perimeter becomes a water return. It is possible to prevent rainwater from entering the air-conditioned area through the air supply flow path. Moreover, the air conditioner for the perimeter can be installed rationally and with good appearance by utilizing the recessed space under the bent portion that bends downward after bending upward in the air supply flow path.

Conceptual diagram of air conditioning system Sectional view of the main part of the air conditioning system

An embodiment of the air conditioning system according to the present invention will be described with reference to the drawings.
FIG. 1 schematically shows the configuration of the air conditioning system according to the present invention, and as shown in FIG. 1, this air conditioning system is used for the thermal environment of the air conditioning target area A such as an office room in an office building. It is configured as a system for conditioning and ventilation.

This air-conditioning system includes a perimeter air-conditioning equipment 1 that air-conditions the perimeter side such as near a window in the air-conditioning target area A, and an interior air-conditioning equipment 2 that air-conditions the interior side of the air-conditioning target area A. The thermal environment of each of the perimeter side and the interior side is adjusted according to the heat load of each of the perimeter side and the interior side of the region A.
Further, this air conditioning system is provided with a natural ventilation facility 3 for natural ventilation in the air conditioning target area A and a mechanical ventilation facility 4 for mechanical ventilation in the air conditioning target area A, depending on various conditions such as outside air conditions. The natural ventilation and the mechanical ventilation are appropriately switched, and the ventilation target area A is ventilated in the ventilation mode suitable at that time.

The perimeter air-conditioning equipment 1 is provided with an air outlet 11 that blows out temperature-controlled regulated air SA toward the perimeter side of the air-conditioning target area A. The air-conditioning equipment 1 for a perimeter adjusts the thermal environment on the perimeter side of the air-conditioning target area A by the adjusting air SA blown out from the air outlet 11. The air outlet 11 of the perimeter air-conditioning equipment 1 is arranged in the ceiling portion C on the perimeter side of the air-conditioning target area A in a state of being equipped in, for example, the indoor unit 12 of the perimeter air-conditioning equipment 1.
Examples of the indoor unit 12 of the air conditioning equipment 1 for the perimeter include an indoor unit of a packaged air conditioner, a fan coil unit, and the like. For example, air on the perimeter side of the air conditioning target area A is sucked from an air suction port (not shown). Then, the suction air can be temperature-controlled by an internal heat exchanger (not shown) to be adjusted air SA, and then blown out from the air outlet 11.

The interior air-conditioning equipment 2 is provided with an air outlet 21 that blows out temperature-controlled adjusted air SA toward the interior side of the air-conditioning target area A. The interior air-conditioning equipment 2 adjusts the thermal environment on the interior side of the air-conditioning target area A by the adjusted air SA blown out from the air outlet 21. The air outlet 21 of the interior air-conditioning equipment 2 is arranged in the ceiling portion C on the interior side of the air-conditioning target area A in a state of being equipped in, for example, the indoor unit 22 of the interior air-conditioning equipment 2.
As the indoor unit 22 of the interior air conditioning equipment 2, an indoor unit of a packaged air conditioner, a fan coil unit, and the like can be exemplified. For example, air on the interior side of the air conditioning target area A is sucked from an air suction port (not shown). Then, the suction air can be temperature-controlled by an internal heat exchanger (not shown) to be adjusted air SA, and then blown out from the air outlet 21.

The natural ventilation facility 3 includes an air supply flow path 31 that supplies outside air OA to the air conditioning target area A, and an exhaust flow path 32 that exhausts the air in the air conditioning target area A to the outside as exhaust air EA. ..
The air supply flow path 31 of the natural ventilation facility 3 is provided with an outside air intake port 31A that opens while facing the outdoors and an air supply port 31B that opens while facing the air conditioning target area A, and is provided from the outside air intake port 31A. The taken-in outside air OA is supplied to the air-conditioning target area A from the air supply port 31B. The air supply port 31B of the natural ventilation facility 3 is installed, for example, in the ceiling portion C facing the air conditioning target area A.
The exhaust flow path 32 of the natural ventilation facility 3 is provided with an exhaust port 32A that opens while facing the air conditioning target area A and an air discharge port 32B that opens while facing the outdoors, and is an air conditioning target taken in from the exhaust port 32A. The air in the region A is discharged to the outside from the air discharge port 32B as the exhaust air EA. The exhaust port 32A of the natural ventilation equipment 3 is also installed, for example, in the ceiling portion C facing the air conditioning target area A.

Although not shown, the mechanical ventilation equipment 4 is configured to include an air supply fan, an air supply flow path, an exhaust fan, an exhaust passage, and the like, and the outside air OA is air-conditioned through the air supply flow path by the driving force of the air supply fan. While supplying to A, the driving force of the exhaust fan releases the air in the air conditioning target area A to the outside as exhaust air EA through the exhaust flow path.

The mechanical ventilation equipment 4 has heat from a total heat exchanger or the like that exchanges heat between the outside air OA supplied to the air conditioning target area A through the air supply flow path and the exhaust air EA discharged to the outside through the exhaust flow path. The exchanger can be attached as appropriate. In this way, when the outside air OA is hotter and more humid than the air in the air conditioning target area A, such as in summer, the hot and humid outside air OA is replaced with the lower temperature and lower humidity exhaust air EA. It can be supplied to the air-conditioning target area A after being cooled and dehumidified by the total heat exchange. In addition, when the outside air OA is colder and less humid than the air in the air conditioning target area A, such as in winter, the low temperature and low humidity outside air OA is exchanged with the higher temperature and higher humidity exhaust air EA. It can be supplied to the air conditioning target area A after being heated and humidified.

Next, the arrangement of the air supply port 31B of the natural ventilation facility 3 will be described.
In this air conditioning system, the air supply port 31B of the natural ventilation equipment 3 is arranged on the interior side of the air conditioning target area A with respect to the air outlet 11 of the air conditioning equipment 1 for the perimeter. Further, the air supply port 31B of the natural ventilation equipment 3 is arranged between the air outlet 11 of the air conditioning equipment 1 for the perimeter and the air outlet 21 of the air conditioning equipment 2 for the interior.

Specifically, in this air conditioning system, in the ceiling portion C facing the air conditioning target area A, the air outlet 11 of the air conditioning equipment 1 for the perimeter, in the order from the perimeter side near the window W to the interior side on the center side, The air supply port 31B of the natural ventilation equipment 3 and the air outlet 21 of the interior air conditioning equipment 2 are arranged. The air supply port 31B of the natural ventilation equipment 3 is arranged, for example, at the boundary between the air-conditioning target area (perimeter zone) of the perimeter air-conditioning equipment 1 and the air-conditioning target area (interior zone) of the interior air-conditioning equipment 2.

In the air conditioning system configured in this way, the introduction position of the outside air OA when the natural ventilation equipment 3 naturally ventilates the air conditioning target area A is located in the air conditioning target area A rather than the air outlet 11 of the perimeter air conditioning equipment 1. Since it is closer to the interior side of the air conditioning area A, the introduction of outside air OA to the perimeter side of the air conditioning target area A, which has a large air conditioning load to counter the outside temperature, is suppressed, and the outside air to the interior side of the air conditioning target area A is suppressed. The introduction of OA can be promoted.

Therefore, in winter when the outside air temperature is low, it is possible to suppress the natural drop of low temperature outside air OA (so-called cold draft) on the perimeter side of the air conditioning target area A heated by the air conditioning equipment 1 for the perimeter. This makes it possible to reduce discomfort to those who are on the perimeter side. In addition, by suppressing the introduction of outside air OA in a temperature range opposite to the air conditioning load on the perimeter side of the air conditioning target area A throughout the year, the air conditioning load of the perimeter air conditioning equipment 1 due to the introduced outside air OA during natural ventilation. Can be suppressed.

Furthermore, by suppressing the occurrence of cold drafts and the increase in the air conditioning load of the perimeter air conditioning equipment 1 when the natural ventilation equipment 3 performs natural ventilation in the air conditioning target area A, the outside air conditions under which natural ventilation can be effectively used are expanded. can do. Therefore, when the ventilation of the air-conditioned area A is performed by switching between natural ventilation and mechanical ventilation depending on the outside air condition, it is possible to increase the chances of performing natural ventilation, and it is possible to promote energy saving by natural ventilation.

Further, by promoting the introduction of the outside air OA to the interior side of the air-conditioning target area A when the natural ventilation equipment 3 naturally ventilates the air-conditioning target area A, for example, even though the outside temperature is low. When a cooling load is generated on the interior side of the air-conditioning target area A, it is possible to improve energy saving by cooling the outside air.

Next, the air supply flow path 31 of the natural ventilation facility 3 will be described.
FIG. 2 shows a specific configuration example of the air supply flow path 31 of the natural ventilation facility 3. In the example of FIG. 2, the air supply flow path 31 is configured on the side of the ceiling portion C of the air conditioning target area A. The air supply flow path 31 covers the outside air intake port 31A, which is the outdoor side end, the air supply port 31B, which is the air conditioning target area A side end, and the outside air intake port 31A and the air supply port 31B. It is composed of a duct 31D. The air supply duct 31D is provided with a damper 31E that opens and closes the air supply flow path 31. The damper 31E is used when switching between natural ventilation by the natural ventilation equipment 3 and mechanical ventilation by the mechanical ventilation equipment 4.
The outside air intake port 31A of the air supply flow path 31 is arranged at substantially the same height as the air supply port 31B, and the outside air OA is laterally arranged from the upper part of the window W on the wall portion that is the boundary between the outside and the air conditioner target area A. It is installed in a state of taking in.

The air supply port 31B of the air supply flow path 31 supplies air sideways from a portion on the interior side of the air outlet 11 of the perimeter air conditioner 1 toward the interior side at a location near the ceiling portion C in the air conditioning target area A. It is installed in a state where it can be used.
Therefore, in this air conditioning system, when the natural ventilation equipment 3 performs natural ventilation in the air conditioning target area A, the introduction of outside air to the perimeter side, which is the back side of the air supply port 31B of the natural ventilation equipment 3, is further suppressed. However, it is possible to promote the introduction of the outside air OA to the interior side, which is the front side of the air supply port 31B. Moreover, since the outside air OA is supplied sideways from the vicinity of the ceiling surface toward the interior side, the flow of the supply air tends to flow along the ceiling surface of the ceiling portion C due to the Counder effect. It is possible to further promote the introduction of the outside air OA to the interior side while further suppressing the introduction of the outside air OA to the side.

The air supply duct 31D of the air supply flow path 31 is provided with a bent portion K that bends upward and then downward.
Specifically, the air supply duct 31D includes an upward duct portion 31a extending diagonally upward from the outdoor outside air intake port 31A toward the indoor air supply port 31B side, and an air supply port 31B from the tip of the upward duct portion 31a. The first lateral duct portion 31b extending laterally toward the side, the downward duct portion 31c extending substantially downward from the tip of the first lateral duct portion 31b toward the air supply port 31B side, and the tip of the downward duct portion 31c. It is composed of a second lateral duct portion 31d extending laterally from the side toward the air supply port 31B side. The bent portion K of the air supply duct 31D is composed of an upward duct portion 31a, a first lateral duct portion 31b, and a downward duct portion 31c.

Then, in the recessed space S below the bent portion K of the air supply duct 31D, that is, in the upward recessed space S surrounded by the upward duct portion 31a, the first lateral duct portion 31b, and the downward duct portion 31c, the air conditioning equipment for the perimeter The indoor unit 12 of 1 is installed in an embedded state. In other words, the indoor unit 12 of the perimeter air conditioner 1 is housed in the recessed space S under the bent portion K of the air supply duct 31D.

Therefore, in this air conditioning system, the upward duct portion 31a (an example of a portion bent upward) at the bent portion K of the air supply duct 31D becomes a water return, and rainwater enters the air conditioning target area A through the air supply flow path 31. Can be suppressed. Moreover, the perimeter air-conditioning equipment 1 can be rationally and visually installed by utilizing the recessed space S under the bent portion K of the air supply duct 31D.

[Another Embodiment]
(1) In the above-described embodiment, as a specific configuration of the air supply port 31B of the natural ventilation facility 3, an example is shown in which air is supplied sideways toward the interior side of the air-conditioning target area A, but it is directed downward or upward. It may be the one that supplies air to the air.

(2) In the above-described embodiment, a case where the bent portion K provided in the air supply flow path 31 of the natural ventilation facility 3 is configured to bend upward and then downward is shown as an example. However, for example, it may be configured to bend only on the upper side. Further, the air supply flow path 31 of the natural ventilation facility 3 does not have to be provided with the bent portion K.

(3) In the above-described embodiment, the air supply port A of the natural ventilation equipment 3 is a boundary between the air-conditioning target area (perimeter zone) of the perimeter air-conditioning equipment 1 and the air-conditioning target area (interior zone) of the interior air-conditioning equipment 2. Although the case where it is arranged in the portion is shown as an example, it may be arranged on the perimeter side or the interior side of the boundary portion.

1 Perimeter air-conditioning equipment 11 Air-conditioning outlet 2 Interior air-conditioning equipment 21 Air-conditioning outlet 3 Natural ventilation equipment 31 Air supply flow path 31A Outside air intake port 31B Air supply port A Air-conditioning target area K Bending part S Recessed space

Claims (3)

It is equipped with air-conditioning equipment for perimeters that air-conditions the perimeter side of the air-conditioning target area, natural ventilation equipment that performs natural ventilation in the air-conditioning target area, and interior air-conditioning equipment that air-conditions the interior side of the air-conditioning target area.
The air supply port of the natural ventilation equipment is on the interior side of the air-conditioning target area with respect to the air outlet of the air-conditioning equipment for the perimeter, and the air outlet of the air-conditioning equipment for the perimeter and the air outlet of the air-conditioning equipment for the interior. Placed in between
The exhaust port of the natural ventilation equipment is arranged on the side opposite to the air supply port of the natural ventilation equipment with respect to the air outlet of the interior air conditioning equipment.
The natural ventilation equipment supplies air to the air-conditioning target area from the air supply port arranged between the air outlet of the perimeter air-conditioning equipment and the air outlet of the interior air-conditioning equipment, and the interior air-conditioning equipment. There rows natural ventilation of the air-conditioning target area in a form exhausting from the exhaust port, wherein the natural ventilation of the air supply port is disposed opposite to the air outlet of,
The air-conditioning equipment for the perimeter and the air-conditioning equipment for the interior have different thermal environments according to the air-conditioning loads on the perimeter side and the interior side, even if the types of air-conditioning loads differ between the perimeter side and the interior side in the air-conditioning target area. Is an adjustable air conditioner,
The air conditioner for the perimeter adjusts the thermal environment on the perimeter side according to the heating load on the perimeter side in the air conditioning target area, and the air conditioner for the interior adjusts the thermal environment on the interior side according to the cooling load on the interior side in the air conditioning target area. An air conditioning system that regulates the thermal environment. The natural ventilation of the air inlets, the perimeter air conditioning equipment air conditioning system of claim 1, wherein is installed in a state that supply sideways toward the portion of the interior side interior side of the air outlet of the. It is equipped with a perimeter air-conditioning system that air-conditions the perimeter side of the air-conditioning target area and a natural ventilation facility that naturally ventilates the air-conditioning target area.
The air supply port of the natural ventilation equipment is arranged on the interior side of the air conditioning target area with respect to the air outlet of the air conditioning equipment for the perimeter.
On the ceiling side of the air-conditioned area, the air supply flow path from the outside air intake port to the air supply port in the natural ventilation facility is provided with a bent portion that bends upward and then downward.
An air conditioning system in which the air conditioning equipment for a perimeter is installed in a recessed space below the bent portion.

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