JP2018017485A - Air conditioning system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an air conditioning system that can conduct natural ventilation by a natural ventilation installation while inhibiting generation of cold draft and an increase in air conditioning load of an air conditioning installation for a perimeter.SOLUTION: An air conditioning system includes: an air conditioning installation 1 for a perimeter for conditioning air on a side of a perimeter in an air conditioning region A; and a natural ventilation installation 3 for conducting natural ventilation for the air conditioning region A. The natural ventilation installation 3 has an air supply port 31B disposed on an interior side of the air conditioning region A relative to an air blow-out port 11 of the air conditioning installation 1 for a perimeter.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning system that performs air conditioning in an air conditioning target area.

In an air-conditioning target area such as an office room 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 is larger on the perimeter side than the interior side due to the influence of low temperature outside air. As a result, the cooling load on the perimeter side tends to be larger than that on the interior side.
In addition, depending on the air conditioning target area, cooling loads occur throughout the year due to the concentration of heat sources such as office automation equipment and office workers on the interior side, and air conditioning to counter the outside temperature throughout the year on the perimeter side. There are cases where the type of air conditioning load differs 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 an air conditioning target area, it is often used to provide a perimeter air conditioning facility that performs air conditioning on the perimeter side, in addition to an interior air conditioning facility that performs air conditioning on the interior side.

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

Japanese Patent Application Laid-Open No. 08-21085

In the above conventional air conditioning system, when ventilating the air-conditioning target area with natural ventilation equipment, the wall on the perimeter side of the air-conditioning target area heated by the perimeter air-conditioning equipment in the winter season when the outside air temperature is low Since the low temperature outside air is introduced from above, a natural drop of the low temperature outside air (so-called cold draft) occurs on the perimeter side of the air-conditioning target area, which causes inconvenience to those who are on the perimeter side.
In addition, during the summer when the outside air 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 perimeter air-conditioning equipment. Outside air in a temperature range opposite to the air conditioning load is directly introduced to the perimeter side, which causes an inconvenience of increasing the air conditioning load of the perimeter air conditioning equipment.

  In view of this situation, the main problem of the present invention is to provide an air conditioning system capable of performing natural ventilation with natural ventilation equipment while suppressing the occurrence of cold drafts and the increase in the air conditioning load of air conditioning equipment for perimeters. .

The first characteristic configuration of the present invention includes a perimeter air conditioning facility that performs air conditioning on the perimeter side of the air conditioning target area, and a natural ventilation facility that performs natural ventilation of the air conditioning target area,
The air supply port of the natural ventilation facility is located closer to the interior side of the air-conditioning target area than the air outlet of the perimeter air conditioning facility.

According to this configuration, when performing natural ventilation of the air-conditioning target area with the natural ventilation equipment, the air-conditioning equipment for the perimeter from the air supply port arranged on the interior side of the air-conditioning target area rather than the air outlet of the air-conditioning equipment for the perimeter Since outside air is introduced to the interior side of the air-conditioning target area rather than the regulated air blown out from the air, the introduction of outside air to the perimeter side of the air-conditioning target area is suppressed and the introduction of outside air to the interior side of the air-conditioning target area is promoted be able to.
Therefore, in winter when the outside air temperature is low, it is possible to suppress the natural fall of the low temperature outside air (so-called cold draft) from occurring on the perimeter side of the air conditioning target area heated by the air conditioning facility for the perimeter, Discomfort to the person on the perimeter side can be reduced.
In addition, it is possible to suppress the introduction of outside air in a temperature range that is inconsistent with the air conditioning load to the perimeter side of the air conditioning target area throughout the year, so that the increase in the air conditioning load of the perimeter air conditioning equipment due to the introduced outside air is suppressed. Can do.
Therefore, natural ventilation can be performed by the natural ventilation facility while suppressing the occurrence of a cold draft and the increase in the air conditioning load of the perimeter air conditioning facility.

  Furthermore, it is possible to expand the outdoor air conditions that can effectively use natural ventilation by suppressing the occurrence of cold drafts and the increase in the air conditioning load of the air conditioner for the perimeter when natural ventilation is performed in the natural ventilation facility. it can. Therefore, it becomes possible to increase the opportunity to perform natural ventilation, and energy saving by natural ventilation can be promoted.

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

The second characteristic configuration of the present invention is provided with an air conditioning facility for interior that performs air conditioning on the interior side of the air conditioning target area,
The air supply port of the natural ventilation facility is located between the air outlet of the perimeter air conditioning facility and the air outlet of the interior air conditioning facility.

According to this configuration, when the natural ventilation facility performs natural ventilation in the air conditioning target area, the supply of the natural ventilation facility disposed between the air outlet of the perimeter air conditioning facility and the air outlet of the interior air conditioning facility is provided. The flow of air between the interior-side area adjusted by the interior air-conditioning equipment and the perimeter-side area adjusted by the perimeter air-conditioning equipment can be suppressed by the outside air introduced from the air vent.
Therefore, when the type of air conditioning load differs between the perimeter side and the interior side of the air conditioning target area, air conditioning (for example, heating) on the perimeter side by the air conditioning facility for perimeter and air conditioning on the interior side (for example, cooling) by the air conditioning facility for interior Can be efficiently performed in a state in which mixing loss (mixing loss) is suppressed, and energy saving can be further improved.

  According to a third characteristic configuration of the present invention, the air supply port of the natural ventilation facility is installed in a state in which air is supplied laterally from the interior side to the interior side of the air outlet of the perimeter air conditioning facility. There is in point.

According to this configuration, when performing natural ventilation of the air-conditioning target area with the natural ventilation facility, the introduction of the outside air to the perimeter side, which is the back side of the air supply port of the natural ventilation facility, is further suppressed. 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 facility is supplied sideways toward the interior side from near the horizontal surface such as the ceiling surface, the flow of the air supply tends to flow along the horizontal surface due to the Counder effect. The introduction of the outside air to the interior side can be further promoted while further suppressing the introduction of the outside air to the perimeter side.
Therefore, it is possible to further suppress the occurrence of a cold draft and the increase in the air conditioning load of the perimeter air conditioning facility when the air conditioning target area is ventilated by the natural ventilation facility. Further, it is possible to further expand the outdoor air conditions that can effectively use natural ventilation to further promote energy saving by natural ventilation, and to further improve the energy saving performance by outdoor air cooling.

According to a fourth characteristic configuration of the present invention, on the ceiling side of the air-conditioning target area, the air supply passage from the outside air intake port to the air supply port in the natural ventilation facility has a bent portion that is bent upward and then bent downward. Provided,
The air conditioner for the perimeter is installed in the hollow space below the bent portion.

  According to the said structure, the site | part bent to the upper side of the bending part of the air supply flow path for arrange | positioning the air supply opening of natural ventilation equipment to the interior side rather than the air supply opening of perimeter air-conditioning equipment becomes water return. It is possible to prevent rainwater from entering the air-conditioning target area through the air supply channel. In addition, the air conditioner for the perimeter can be installed rationally and attractively by using the hollow space below the bent portion that bends downward after being bent upward of the air supply channel.

Conceptual diagram of air conditioning system Cross section of the main part of the air conditioning system

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

The air conditioning system includes a perimeter air conditioning facility 1 that air-conditions the perimeter side such as near a window in the air conditioning target area A, and an interior air conditioning facility 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 on each of the perimeter side and the interior side of the area A.
In addition, the air conditioning system includes a natural ventilation facility 3 for natural ventilation of the air-conditioning target area A and a mechanical ventilation facility 4 for mechanical ventilation of the air-conditioning target area A, according to various conditions such as outside air conditions. Natural ventilation and mechanical ventilation are appropriately switched, and the air-conditioning target area A is ventilated in a ventilation mode suitable at that time.

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

The interior air conditioning equipment 2 is provided with an air outlet 21 for blowing out the temperature-adjusted adjusted air SA toward the interior side of the air-conditioning target area A. The air conditioning equipment for interior 2 adjusts the thermal environment on the interior side of the air-conditioning target area A by the adjustment air SA blown out from the air outlet 21. The air outlet 21 of the interior air conditioning equipment 2 is disposed, for example, in the ceiling portion C on the interior side of the air-conditioning target area A while being installed in the indoor unit 22 of the interior air conditioning equipment 2.
Examples of the indoor unit 22 of the interior air conditioning equipment 2 include a packaged air conditioner indoor unit and a fan coil unit. For example, the air on the interior side of the air-conditioning target area A is sucked from an air suction port (not shown). Thus, the intake air can be blown out from the air outlet 21 after the temperature of the intake air is adjusted by an internal heat exchanger (not shown) to obtain the adjusted air SA.

The natural ventilation facility 3 includes an air supply passage 31 that supplies the outside air OA to the air-conditioning target area A, and an exhaust passage 32 that exhausts the air in the air-conditioning target area A to the outside as the exhaust air EA. .
The air supply passage 31 of the natural ventilation facility 3 is provided with an outside air intake port 31A that opens in a state of facing the outdoors, and an air supply port 31B that opens in a state of facing the air-conditioning target area A, from the outside air intake port 31A. The taken 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 a ceiling part C facing the air conditioning target area A.
The exhaust passage 32 of the natural ventilation facility 3 includes an exhaust port 32A that opens in a state facing the air-conditioning target area A, and an air discharge port 32B that opens in a state facing the outdoor, and is an air-conditioning target taken in from the exhaust port 32A. The air in the area 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 facility 3 is also installed in, for example, the ceiling C facing the air conditioning target area A.

  Although not shown, the mechanical ventilation equipment 4 includes an air supply fan, an air supply passage, an exhaust fan, an exhaust passage, and the like, and the outside air OA is air-conditioned through the supply passage with the driving force of the air supply fan. In addition to being supplied to A, the air in the air-conditioning target area A is discharged outdoors as exhaust air EA through the exhaust passage by the driving force of the exhaust fan.

  The mechanical ventilation equipment 4 includes heat such as a total heat exchanger 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 outside through the exhaust flow path. An exchanger can be attached as appropriate. In this way, when the outside air OA is hotter and humid than the air in the air-conditioning target area A, such as in summer, the hot and humid outside air OA is converted into the exhaust air EA having a lower temperature and lower humidity. After being cooled and dehumidified by total heat exchange, it can be supplied to the air conditioning target area A. In addition, when the outside air OA is at a lower temperature and lower humidity than the air in the air-conditioning target area A, such as in winter, the outside air OA at a lower temperature and lower humidity can be exchanged with the exhaust air EA at a higher temperature and humidity. 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 inlet 31 </ b> B of the natural ventilation facility 3 is arranged closer to the interior of the air conditioning target area A than the air outlet 11 of the perimeter air conditioning facility 1. In addition, the air supply port 31 </ b> B of the natural ventilation facility 3 is disposed between the air outlet 11 of the perimeter air conditioning facility 1 and the air outlet 21 of the interior air conditioning facility 2.

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

  In the air conditioning system configured as described above, the introduction position of the outside air OA when the natural ventilation facility 3 performs natural ventilation of the air conditioning target region A is more air-conditioned than the air outlet 11 of the perimeter air conditioning facility 1. Therefore, the introduction of outside air OA to the perimeter side of the air-conditioning target area A having a large air-conditioning load to counter the outside air temperature is suppressed, and the outside air to the interior side of the air-conditioning target area A is accordingly reduced. The introduction of OA can be promoted.

  Therefore, in the winter season when the outside air temperature is low, the natural fall of the low temperature outside air OA (so-called cold draft) on the perimeter side of the air conditioning target area A heated by the perimeter air conditioning equipment 1 is suppressed. It is possible to reduce discomfort to the person on the perimeter side. In addition, by suppressing the introduction of outside air OA in a temperature range that is inconsistent with the air conditioning load on the perimeter side of the air conditioning target area A throughout the year, the air conditioning load of the air conditioner 1 for the perimeter due to the introduced outside air OA during natural ventilation Can be suppressed.

  In addition, it is possible to suppress the occurrence of cold drafts when natural ventilation of the air-conditioning target area A in the natural ventilation facility 3 and the increase in the air conditioning load of the perimeter air conditioning facility 1, thereby expanding the outside air conditions that can effectively use natural ventilation. can do. Therefore, when performing ventilation of the air-conditioning target area A by switching between natural ventilation and mechanical ventilation according to the outside air condition, it is possible to increase the opportunities for natural ventilation, and 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 facility 3 performs natural ventilation of the air-conditioning target area A, for example, even though the outside temperature is low In the case where a cooling load is generated on the interior side of the air-conditioning target area A, it is possible to improve the energy saving by the outside air cooling.

Next, the air supply passage 31 of the natural ventilation facility 3 will be described.
FIG. 2 shows a specific configuration example of the air supply passage 31 of the natural ventilation facility 3. In the example of FIG. 2, the air supply channel 31 is configured on the ceiling C side of the air conditioning target area A. The supply air flow path 31 includes an outdoor air intake port 31A that is an outdoor side end, an air supply port 31B that is an air conditioning target area A side end, and an air supply that extends across the external air intake port 31A and the air supply port 31B. It is comprised from the duct 31D. A damper 31E that opens and closes the air supply passage 31 is interposed in the air supply duct 31D. The damper 31E is used when switching between natural ventilation by the natural ventilation facility 3 and mechanical ventilation by the mechanical ventilation facility 4.
The outside air intake port 31A of the air supply passage 31 is disposed at substantially the same height as the air supply port 31B, for example, and the outside air OA laterally from the upper part of the window W in the wall portion serving as a boundary between the outdoor and the air conditioning target area A. It is installed in the state to capture.

The air supply port 31B of the air supply channel 31 supplies air in a lateral direction from a location closer to the interior side to the interior side than the air outlet 11 of the air conditioner 1 for the perimeter at a location near the ceiling C of the air conditioning target area A. It is installed in the state to do.
Therefore, in this air conditioning system, when natural ventilation of the air conditioning target area A is performed by the natural ventilation facility 3, introduction of outside air to the perimeter side that is the back side of the air supply port 31B of the natural ventilation facility 3 is further suppressed. However, the introduction of the outside air OA to the interior side that is the front side of the air supply port 31B can be promoted. Moreover, since the outside air OA is supplied laterally 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 co-under effect. While further suppressing the introduction of the outside air OA to the side, the introduction of the outside air OA to the interior side can be further promoted.

The air supply duct 31D of the air supply flow path 31 is provided with a bent portion K that is bent upward and then bent downward.
Specifically, the air supply duct 31D includes an upward duct portion 31a extending obliquely upward from the outdoor outside air intake port 31A toward the indoor air supply port 31B, and an air supply port 31B from the tip of the upward duct portion 31a. A first lateral duct portion 31b extending laterally toward the side, a downward duct portion 31c extending substantially directly downward from the distal end of the first lateral duct portion 31b toward the air supply port 31B, and the distal end of the downward duct portion 31c It is comprised from the 2nd sideways duct part 31d extended sideways toward the air supply port 31B side from the side. The bent portion K of the air supply duct 31D includes an upward duct portion 31a, a first lateral duct portion 31b, and a downward duct portion 31c.

  The air conditioner for the perimeter is provided in the hollow space S below the bent portion K of the air supply duct 31D, that is, the upward hollow space S surrounded by the upward duct portion 31a, the first lateral duct portion 31b, and the downward duct portion 31c. One indoor unit 12 is installed in an embedded state. In other words, the indoor unit 12 of the perimeter air conditioning facility 1 is accommodated in the hollow space S below 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) in the bent portion K of the air supply duct 31D becomes water return, and rainwater enters the air conditioning target area A through the air supply passage 31. This can be suppressed. In addition, the air conditioner 1 for the perimeter can be installed rationally and attractively using the hollow space S below 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 downward or upward It may be one that supplies air.

  (2) In the above-described embodiment, the case where the bent portion K provided in the air supply flow path 31 of the natural ventilation facility 3 is configured to be bent downward after being bent upward is shown as an example. However, for example, it may be configured to bend only upward. Further, the air supply flow path 31 of the natural ventilation facility 3 may not include the bent portion K.

  (3) In the above-described embodiment, the air supply port A of the natural ventilation facility 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 arrange | positions to the part was shown as an example, you may arrange | position to the perimeter side or interior side rather than a boundary part.

DESCRIPTION OF SYMBOLS 1 Air conditioner for perimeters 11 Air blower outlet 2 Air conditioner for interiors 21 Air blower outlet 3 Natural ventilation equipment 31 Air supply flow path 31A Outside air intake port 31B Air supply port A Air-conditioning object area K Bending part S Dimple space

Claims (4)

Perimeter air conditioning equipment that performs air conditioning on the perimeter side of the air conditioning target area and natural ventilation equipment that performs natural ventilation of the air conditioning target area are provided,
An air conditioning system in which an air supply port of the natural ventilation facility is arranged closer to an interior side of an air conditioning target area than an air outlet of the perimeter air conditioning facility. Air conditioning equipment for interior that performs air conditioning on the interior side of the air conditioning target area is provided,
The air conditioning system according to claim 1, wherein an air supply port of the natural ventilation facility is disposed between an air outlet of the air conditioner for the perimeter and an air outlet of the air conditioner for the interior.   The air conditioner according to claim 1 or 2, wherein an air supply port of the natural ventilation facility is installed in a state in which air is supplied laterally from a location closer to the interior side to an interior side than an air outlet of the air conditioner for the perimeter. system. On the ceiling side of the air conditioning target area, the air supply passage 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 after bending upward,
The air conditioning system according to any one of claims 1 to 3, wherein the perimeter air conditioning equipment is installed in a hollow space below the bent portion.

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