JP2000291972A - Air conditioning method for perimeter zone, and member equipped with blowoff outlet for air conditioning for the perimeter zone - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce air mixing loss by restricting induction of air in the interior zone by an air stream blown into a perimeter zone in an air conditioning method for the perimeter zone. SOLUTION: There are disposed a first blowoff outlet 6 in the vicinity of a load surface 3 in a perimeter zone Z1 and a second blowoff outlet 7 farther inward of a building than the first blowoff outlet. A high-speed air stream H is blown out from the first blowoff outlet along the load surface 3, and a low-speed air stream L with the same air direction as that of the high-speed air stream at a lower speed than the high-speed air stream from the second blowoff outlet 7, adjoining the high-speed air stream H, whereby the low-speed air stream L is intervened between the high-speed air stream H and air in an interior zone Z2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a perimeter zone air-conditioning method and a member with an air outlet for perimeter zone air-conditioning.

[0002]

[Prior art]

In recent years, in a large-scale building, the air-conditioning area is often divided into several zones having different heat loads to perform efficient air-conditioning. In particular, in the perimeter zone, a heat load that enters from an outer wall of a building or each inner surface of a window glass (hereinafter, referred to as a load surface), that is,
In order to treat the skin load, a system that circulates air between a sunshade such as a blind and a window glass (hereinafter referred to as an air barrier system) and a general air conditioning system such as a fan coil are often used. However, in this case, if the air between the divided zones is mixed, energy loss (air mixing loss) due to the mixing occurs, and the exhaust heat efficiency and the air conditioning efficiency decrease.

For example, the air barrier system shown in FIG.
Perimeter zone Z ₁ push fan 9 disposed below
In, blown up air sucked from the interior zone Z ₂ lower half as a push flow P, the After removal of the skin load in perimeter zone, is configured to exhaust by the exhaust fan (heat exhaust fan) 11 with the ceiling However, at this time, the push flow P is
To newly attract airflow E especially interior zone Z ₂ lower half through the excess air overflow to the left interior zone Z ₂ upper half bearing a heat which can not be exhausted by the exhaust fan, exhaust heat efficiency Had been lowered. In order to avoid this, it seems that the exhaust air volume of the exhaust fan should be increased more than the blow-out volume of the push fan in accordance with the air volume of the induced airflow E due to the push flow. was there. (a) The gap between the perimeter zone and the interior zone is not necessarily interrupted by sheet glass or the like, and the exhaust fan tries to draw air from near the exhaust port. As shown in FIG. 9, the suction airflow S from the vicinity of the ceiling of the interior zone by the exhaust fan
As a result, the induced airflow E due to the push flow is
Cannot be processed by the exhaust fan, and there is a strong possibility that a part of the induced airflow will flow into the interior zone below the suction airflow S. (b) Even if all of the induced airflow E can be exhausted, the energy consumption of the exhaust fan is increased by increasing the exhaust amount, so that the efficiency as the exhaust heat system (the amount of exhaust heat per unit of energy consumption) is eventually increased. It does not mean much improvement.

When an air-conditioning airflow A (cold air or hot air) outlet for a general air-conditioning system is provided on the floor-standing counter of FIG. 10, a part of the skin load that cannot be completely processed by the airflow is: It may be carried to the interior zone by the illustrated induced airflow E and cause a mixing loss.

[0005] Further, in the case where the air outlet for the general air-conditioning system is provided on the ceiling as shown in Fig. 11, when the perimeter zone is heated and the interior zone is cooled, as is often done in offices with OA equipment in winter in recent years, ( JP 10-2
No. 591 and No. 10-132309), the cold air C is drawn into the perimeter zone side by the attraction of the hot air W, and the cooling and heating effects of both are canceled out, which may cause a decrease in air conditioning efficiency. .

[0006] As a conventional air conditioning method for the perimeter zone, for example, as shown in the above-mentioned publications, the cold air generated between the window glass and the air-conditioned air stream is removed or suppressed so that the cold air does not mix with the indoor air. Although there is a method for reducing the air mixing loss, there is no known effective method for reducing the air mixing loss due to the airflow induced by the airflow or the airflow induced by the push flow.

In view of the above points, a first object of the present invention is to interpose a low wind speed airflow between a high wind speed airflow corresponding to a conventional air-conditioned airflow or push flow and air in an interior zone. Another object of the present invention is to provide an air conditioning method for a perimeter zone, which restricts the attraction of air from an interior zone and thereby reduces air mixing loss.

A second object of the present invention is to easily carry out the perimeter zone air-conditioning method using the two airflows, so that the air outlet (existing existing air outlet) existing in the perimeter zone for an air barrier system or a general air-conditioning system is used. It is an object of the present invention to provide a member with an outlet which can be retrofitted to the outlet through a simple renewal work.

[0009]

First problem achieving means of the present invention, in order to solve the problem] is related to an air conditioning method perimeter zones, by traveling airflow along the load surface 3 of the perimeter zone Z _1, skin load In the air conditioning method of the perimeter zone provided so as to remove air, the first air outlet 6 is provided near the load surface 3, and the second air outlet 7 is provided inside the building from the first air outlet. The high wind speed airflow H is blown out from the first blowout port 6 along the load surface 3, and the second blowout port 7 is adjacent to the high windflow speed H and is higher than the high windflow speed H. by blowing the low wind speed airflow L having the same wind direction at a low speed, in which the low air velocity air flow L is interposed between the air of the high air velocity air flow H and the interior zone Z _2.

[0010] A second object of the present invention is to provide a perimeter zone air-conditioning method having the above-mentioned first means.
The high-speed airflow H and the low-speed airflow L that have traveled from one end to the other end are discharged outside by the exhaust fan 11.

A third object of the present invention is to provide a perimeter zone air-conditioning method having the above-described first means, wherein the high wind speed air H and the low wind speed air L enter the skin load from the load surface 3 as warm air or cold air. Cold or warm air is used to reduce or eliminate some of the air.

The fourth object of the present invention relates to a member with an air outlet for air conditioning in a perimeter zone. The member includes first and second air outlets 6 and 7 all over one surface, and an air inlet 1 and a second air outlet.
6 has an opening on the other surface and a casing 15 having the other surface as a mounting surface 17, and a wind speed adjusting mechanism 21 installed in the casing, and the wind speed adjusting mechanism blows air from at least the second outlet 7. Speed reduction means for reducing the flow velocity of the air to be blown.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIGS.
A first embodiment of the present invention applied to an air barrier system will be described. The invention of the present application can be implemented in almost the same mode for both cooling and heating. Here, a case where the invention is used for cooling will be described.

Reference numeral 1 denotes an outer wall having an inner surface of the window glass 2 as a load surface 3, and a solar light shield 5 such as a Venetian blind or a roll screen is hung from a window portion of a ceiling plate 4 continuous with the outer wall. Have been. As boundary該日Shako ray blocking object, the room is divided into a perimeter zone Z ₁ and interior zone Z _2.

Perimeter zone Z₁Inside the window glass 2
A first outlet 6 placed on a floor plate portion on the lower end side of the surface;
The second outlet 7 placed inside the building than the first outlet
Provide. These first and second outlets are embedded in the floor plate 8.
Connected to the push fan 9. The push fa
The interior zone Z through the ventilation holes provided in the floorboard. _Two
Induces air from the lower part and through the outlets 6 and 7
And perimeter zone Z₁Blow up inside. In addition, the illustration example
Then, the two outlets 6 and 7 are one fan casing.
Although it is configured as an integral type installed in 10,
Each is shaped as a separate body installed in a separate casing
You can do it. Also note the number and shape of the outlets.
There is no restriction on the high wind speed and low wind speed
It is possible to blow out the required amount of air at the same time
I just need.

An exhaust fan 11 is provided in the ceiling plate on the upper side of the inner surface of the window glass 2 so as to correspond to the first and second outlets 6 and 7. The exhaust fan discharges both airflows after the airflows blown out from the air outlets 6 and 7 travel inside the window glass 2 and absorb the skin load. In the illustrated example, the ceiling plate 4, are placed on the exhaust fan and opens the exhaust port perimeter zone Z ₁ side.

From the first outlet 6, a high wind velocity airflow H is blown out. The high wind velocity air blows out along the inner surface of the window glass 2 and is attracted to the inner surface by the Coanda effect to become an attached flow. Since the attached flow cannot diffuse to the window glass side in the drawing, it is less likely to be attenuated than a free jet that can diffuse in all directions perpendicular to the traveling direction, and therefore, its reaching distance can be extended. Thus, the high wind speed H
By running along the inner surface of the windowpane, skin roads that enter from the windowpane 2 by re-emission of solar radiation absorbed by the glass or heat conduction are removed. The wind speed of the high wind speed H is generally about several m / s.
As shown in FIG. 9, when the push flow having a uniform wind speed is used, the wind speed is larger than the wind speed (usually about 2 m / s).
It can be about 4 m / s.

At the same time as the high airflow H, the low airflow L having the same wind direction at a lower speed than the high airflow is blown out of the second air outlet 7.

The low wind speed airflow L, by blown side by side with the high air velocity air flow along the inside of the high air velocity air flow H, the high wind speed air flow H in the interior zone Z ₂ air in perimeter zones Z ₁ To prevent air mixing between the two zones. That is, since the high wind speed H attracts the low wind speed L instead of the air in the interior zone, the attractive force of the high wind speed H is no longer in the interior zone Z _2.
Does not affect the side. Further, since the low wind speed between the air flow L and interior zone Z _2, the velocity gradient is small compared to the case where the air high wind stream and interior zones adjacent,
Attraction of low wind speed air flow itself against the interior zone Z ₂ is also small. Therefore, it is possible to prevent the air from being drawn from the interior zone or to reduce the amount of the drawn air, and to reduce the air mixing loss due to the drawn air flow E.
In addition, by suppressing the induced airflow E, it is possible to prevent the solar light shield 5 from swaying when the induced airflow passes, and to avoid inconvenience such as the reflected light of the shield flickering in the room. it can.

As can be seen from the above description, the low wind speed L
Of wind speed, high wind speed air flow H to the interior zone Z ₂
Large enough to lose the attraction of
Low air velocity airflow L itself must be small enough not to excessively attract air from the interior zone Z ₂ side. The wind speed is determined by various conditions, but can be generally set to a fraction of the wind speed of the high wind speed H, for example, about one eighth.

In the above configuration, the low wind speed airflow L passes through the solar ray shield 5 side of the perimeter zone and removes the re-radiated heat from the solar ray-receiving shield, while maintaining a high level above the perimeter zone. Exhaust fan 1 with wind speed H
It is discharged outside by 1. At this time, the low wind speed airflow L
Is attracted to the inner surface side of the window glass 2 by the attraction of the high wind velocity air flow H as shown in FIG. 2, so that the gas is prevented from being mixed into the interior zone due to the diffusion action or the like.

That is, the condition that the air flow rate of the blown airflow of the conventional perimeter air conditioner having a uniform velocity is equal to the sum of the airflow rates of the high wind velocity airflow and the low wind velocity airflow of the present invention (or the low wind velocity airflow and the uniform velocity velocity). When the conventional example and the present invention are compared under the condition that the wind speed increases in the order of the conventional blown airflow and the high wind speed airflow), the low wind speed is determined by the high wind speed airflow H that is pressed against the load surface and flows as described above. As a result of the airflow L being attracted to the load surface side, the amount of airflow mixed into the interior zone side in the present invention is further reduced as compared with the conventional example.

Next, a second embodiment will be described with reference to FIGS. This embodiment relates to a member with an outlet for retrofit that can be easily attached to an existing outlet of the air-conditioning system described above, and symbols other than the member and the existing outlet are those of the first embodiment. Use the one as it is.

Reference numeral 12 denotes a floor-mounted counter having a built-in blower fan and a cold / hot water coil (not shown). An existing outlet 13 is provided on the upper surface of the counter.

Reference numeral 14 denotes a retrofitted outlet member provided at the existing outlet 13.

The member has a casing 15. In the casing, the first and second outlets 6 and 7 are on one surface (upper surface in FIG. 3), and the suction port 16 is on the other surface (lower surface in FIG. 3).
Side, and the other side is connected to the existing outlet 1
3 is a mounting surface 17 with respect to the periphery. The attachment is performed by well-known attachment means such as bolts and nuts.
The top wall of the casing 15 is formed in a shape having a step 18 as shown in FIG. 3, and a first outlet 6 is formed in an upper step 19 formed by a top wall portion on the outer side of the building. The second outlets 7 are respectively opened in the lower portion 20 forming the top wall portion on the inner side of the object. The first outlet 6 is
As shown in FIG. 4, the upper part of the inner side of the building is elongated in the left-right direction at right angles to the inside and outside of the building.

The casing 15 is provided with a wind speed adjusting mechanism 21 including an acceleration mechanism and a deceleration mechanism.

The accelerating mechanism is configured to move the first
It is formed by an airflow guide 21a provided in a flow path leading to the outlet 6. The airflow guide, as shown in FIG.
It has a fan-shaped cross-sectional shape in contact with the window side (outside of the building) of the upper section and the upper half of the window side wall of the casing 15,
In addition, it is a quarter-cylindrical shape extending in the left-right direction along the first air outlet 6, and the flow width in the flow passage is gradually reduced as going upward along the sectional shape of the fan. Is provided so as to increase the wind speed. Thus,
The airflow is blown out from the first outlet 6 as a high wind speed airflow H. However, in this acceleration mechanism, the area of the first outlet (high-speed outlet) 6 is similar to the area obtained by subtracting the area of the second outlet (low-speed outlet) 7 from the area of the existing outlet 13. It is effective at the time, and when the blowout amount from the existing blowout port 13 is sufficient for the required blowout amount from the first blowout port 6,
It is not necessary to have this.

The speed reduction mechanism is provided in the second direction from the inside of the casing 15.
It is formed by a baffle plate 21b provided in a flow path leading to the outlet 7. The baffle plate is provided so as to increase the blowing resistance in the flow path and reduce the wind speed of the airflow in the flow path. Thus, the airflow is blown out from the second outlet 7 as a low wind velocity airflow L. In the illustrated example, the baffle plate has a lower portion 20 formed as a plate portion with a plurality of through holes (such as punching metal), and the plurality of through holes are used as the second outlet 7. Alternatively, a baffle plate may be provided separately.

In the above configuration, most of the skin load that has entered the room as warm or cool air from the load surface 3 is:
The heat is eliminated by heat exchange with the high wind speed air H and the low wind speed air flow L, whose temperature is set as cold air or hot air. The remaining part of the skin road is, for example, a high wind speed H and a low wind speed L
Is considered to be transported to the vicinity of the ceiling on the interior zone side (see FIG. 5). It is considered that the influence on the living area O is small. That is, in the latter case, since the air-conditioned airflow A induces a new airflow E, the airflow in the perimeter zone increases, and a part of the heated airflow near the ceiling is pushed out to the living area O side, and air mixing is performed. However, in this embodiment, since the low wind speed restricts the attraction of air from the interior zone, if the sum of the blowing amounts of the first and second outlets is about the same as that of the existing outlet, If so, the above-mentioned environmental degradation is unlikely to occur.

Next, a third embodiment of the present invention will be described with reference to FIGS.

[0032] The form, the existing outlet 13 which opens into the ceiling plate 4 of the perimeter zone Z _1, is obtained by installing the air outlet member with 14 for retrofit. That is, the other surface of the casing of the member with the air outlet is attached to the ceiling plate portion around the air outlet with the upper and lower sides inverted from the second embodiment,
Other configurations are the same as those of the second embodiment.

According to this configuration, for example, as shown in FIG. 8, when the cool air C is blown out from the ceiling outlet 22 in the interior zone, the high wind speed which is the warm air from the first and second outlets 6, 7 is provided. The airflow H and the low airflow L are blown out, and the low airflow is interposed between the high airflow H and the cold air C to prevent the cold air C from being drawn into the perimeter zone.

[0034]

The present invention has the above-described configuration,
In the case of the first aspect, the following effects are obtained. (a) While blowing out the high wind velocity H along the load surface 3,
Side by side with the high wind speed airflow, low wind speed airflow L between the air and the high air velocity air flow H interior zone Z ₂ by blowing low wind speed airflow L having the same wind direction at high wind speeds lower rate than air flow Since it is interposed, the high wind speed airflow induces a low wind speed airflow instead of the interior zone air, and the attraction of the interior zone air by the high wind speed airflow is suppressed. It is possible to reduce the air mixing loss accompanying the decrease in exhaust heat efficiency and exhaust efficiency, or to reduce the initial power and running cost by keeping the fan power and air conditioning function power to keep the efficiency at a low level. be able to. (b) As described above, the high wind speed H is along the load surface, and the low wind speed L is adjacent to the high wind speed,
The high wind speed H is attracted to the load surface by the Coanda effect and becomes an adherent flow, and the low wind speed L is also attracted to the high wind speed side (that is, the load surface side) by the attraction of the high wind speed. (See FIG. 2, FIG. 5, and FIG. 8), the mixing amount of the gas with the low wind velocity toward the interior zone side is further reduced, and the above-described air mixing loss is further reduced. (c) As described in (a) and (b) above, since the amount of air mixing between the perimeter zone and the interior zone is reduced, the skin load is processed separately from the air flow in the interior zone. For example, a simple and efficient air-conditioning process can be performed. For example, the amount of air blown into the perimeter zone and the amount of exhaust air may be equal.

In the case of the second aspect, the high wind speed H and the low wind speed L having the structure described in the first aspect and traveling from one end of the load surface 3 to the other end thereof. Is discharged to the outside by the exhaust fan 11, so that both air flows can be reliably prevented from entering the interior zone and mixing.
Exhaust heat efficiency or air conditioning efficiency can be further increased.

According to a third aspect of the present invention, there is provided a skin road having the structure described in the first aspect, wherein the high wind speed air H and the low wind speed air L enter the load surface 3 as warm air or cold air. Since the cold air or the hot air is used to reduce or eliminate a part of the skin load, the skin load can be reduced in the remaining portion of the skin load by suppressing the air mixing by the low wind speed air flow L described above.

Further, in the case of the fourth aspect, the member 14 with the air outlet has the first and second air outlets 6 and 7 on one surface and the suction port 16 on the other surface, and has the other surface. Mounting surface 17
And a wind speed adjusting mechanism 21 installed in the casing, and the wind speed adjusting mechanism includes at least a deceleration means for slowing down the flow rate of the air blown out from the second outlet 7. By installing the member with the air outlet in the air outlet 13 already existing in the perimeter zone, the air conditioning method of the present invention can be carried out as it is or with only a slight renewal work without major modification to the existing air outlet, which is convenient.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a main part of a room to which a first embodiment of the present invention, that is, an embodiment in an air barrier system is applied.

FIG. 2 is an explanatory diagram showing a flow of air in the first embodiment.

FIG. 3 is a vertical sectional view of a main part of a room to which a second embodiment of the present invention, that is, a mode using an existing outlet of a floor-standing counter is applied.

FIG. 4 is a perspective view showing a state in which a member with an outlet for retrofit is installed in an existing outlet in the second embodiment.

FIG. 5 is an explanatory diagram showing a flow of air in a second embodiment.

FIG. 6 is a vertical sectional view of a main part of a room to which a third embodiment of the present invention, that is, a mode using an existing outlet with a ceiling is applied.

FIG. 7 is a partially sectional perspective view showing a member with an outlet used in a third embodiment.

FIG. 8 is an explanatory diagram showing a flow of air in a third embodiment.

FIG. 9 is an explanatory diagram showing the flow of air in the conventional air conditioning system corresponding to FIG.

FIG. 10 is an explanatory diagram showing the flow of air in the conventional air conditioning system corresponding to FIG.

FIG. 11 is an explanatory diagram showing the flow of air in the conventional air conditioning system corresponding to FIG.

[Explanation of symbols]

Z ₁ … Perimeter zone Z ₂ … Interior zone H… High wind speed L… Low wind speed P… Push flow E… Attraction air flow A… Air conditioning air flow S… Suction air flow C… Cold air W… Warm air 1… Outer wall 3… Load surface 6 First outlet 7 Second outlet 13 Existing outlet 14 Member with outlet 15 Casing 16 Inlet 17 Mounting surface 21 Wind speed adjusting mechanism 21a Air flow guide 21b Baffle plate

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Naoyuki Hirakawa 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside the Technical Research Institute, Takenaka Corporation (72) Inventor Noriyuki Takahashi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Takenaka Corporation Technical Research Institute Co., Ltd. (72) Inventor Yoshiaki Higuchi 1-5-1, Otsuka, Inzai City, Chiba Prefecture Inside Incorporated Company Takenaka Corporation Technical Research Institute (72) Inventor Mikio Takahashi 1-5-5 Otsuka, Inzai City, Chiba Prefecture Address 1 F-term in Takenaka Corporation Technical Research Institute (Reference) 3L049 BA00 BB05 BB06

Claims (4)

[Claims] We claim: 1. along the load surface 3 of the perimeter zone Z ₁ is traveling airflow, the perimeter zone air conditioning methods provided to remove skin load, first outlet in the vicinity of the load surface 3 6, and a second outlet 7 is disposed inside the building than the first outlet, and a high wind speed air H is blown out from the first outlet 6 along the load surface 3. At the same time, a low wind speed air stream L having the same wind direction at a lower speed than the high wind speed air stream is blown out from the second outlet 7 adjacent to the high wind speed air stream H,
Perimeter zone air-conditioning method, wherein a low wind speed airflow L is interposed between the air of the high air velocity air flow H and the interior zone Z _2. 2. A high wind speed air flow H and a low wind speed air flow L which have traveled from one end side of the load surface 3 to the other end side thereof are supplied to the exhaust fan 1.
2. The air conditioning method for a perimeter zone according to claim 1, wherein the air is discharged outside the room according to (1). 3. The high wind speed air flow H and the low wind speed air flow L,
2. The air conditioning method for a perimeter zone according to claim 1, wherein cold air or hot air is used to reduce or eliminate a part of the skin load that enters as warm air or cool air from the load surface 3. 4. A casing 15 having the first and second outlets 6 and 7 on one surface and the suction port 16 on the other surface and the other surface as a mounting surface 17, and installed in the casing. A wind speed adjusting mechanism 21 for air conditioning for the perimeter zone, characterized in that the wind speed adjusting mechanism comprises at least a speed reducing means for reducing the flow velocity of the air blown out from the second outlet 7. Element.