JPH09236294A - Cooling facilities - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the high cooling effect in the area to be cooled of the lower layer in the space inside a building while attempting to reduce the necessary cooling capacity. SOLUTION: The cooling facilities comprise a cooler 2 for cooling the area 1a to be cooled at the lower layer of a space 1 inside a building, and a ceiling exhaust port 11 for exhausting the indoor air RA2 from the upper end of the space 1 out of the building, wherein an atmosphere introducing port 13 for introducing the atmosphere OA2 provided at the lower position than the ceiling exhaust port 11 and at the higher position than the area 1a to be cooled is provided in the space 1.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling system, and more particularly, to a cooling device for cooling a cooling target area of a lower part of a building space and an indoor air from the upper end of the building space. The present invention relates to a cooling facility provided with a ceiling exhaust port for exhausting air to the outside.

[0002]

2. Description of the Related Art This type of cooling equipment is generally used in high-roof buildings such as factories, but conventionally, in this type of cooling equipment, as shown in FIG. As 1a, the cooling target area 1a is limitedly cooled by the cooling device 2. On the other hand, for the portion 1b above the cooling target area 1a in the building space 1, the indoor air RA2 from the ceiling exhaust port 11 It was only exhausting.

That is, hot air trapped in the portion 1b above the cooling target area 1a is exhausted from the upper end of the building space 1 to the outside by the ceiling exhaust port 11, so that the temperature of the building space 1 is entirely increased. The target area 1a
It is intended to enhance the cooling effect of.

In the figure, reference numeral 10 indicates the indoor air R from the ceiling exhaust port 11.
It is an exhaust fan that compulsorily exhausts A2.

In the equipment shown in FIG. 4, the cooling device 2
An air circulation type is adopted as the air conditioner 6 for supplying the air RA1 in the cooling target area 1a sucked from the return air port 3
And the cooling air SA1 is blown from the outlet 4 into the cooling target area 1a to supply the cooling target area 1a.
To cool down.

Further, in this cooling device 2, 8 is an exhaust passage for discharging a part of the intake air RA1 from the return air outlet 3 to the outside, 9 is an intake passage for the outside air OA1, and these exhaust passages 8 The interior space 1 is ventilated by partially exhausting air and taking in outside air from the outside air intake passage 9.

[0007]

However, if the hot air is exhausted from the ceiling exhaust port 11 in the above-mentioned conventional equipment, the temperature of the roof 12 of the building rises due to the solar radiation (for example, 6 on the inner surface side).
0 ° C to 80 ° C) is not sufficiently suppressed, and the heat radiation from the inner surface of the roof to the cooling target area 1a is large, so that the cooling effect in the cooling target area 1a is sufficiently improved. In other words, in other words, in order to obtain a desired cooling effect in the cooling target area 1a, the cooling device 2 is still required to have a large cooling capacity in consideration of a load due to heat radiation from the inner surface of the roof.

Further, in the conventional equipment, the amount of outside air corresponding to the exhaust air amount Qe from the ceiling exhaust port 11 is the outside air taken in from the outside air intake passage 9 in the cooling device 2 and the outside air entering from the opening such as the door. As a result, the so-called outside air load (that is, the heat load for lowering the inflowing outside air to the target temperature of the cooling target area 1a) is large because the air flows into the cooling target area 1a.
This is also a major factor in increasing the required cooling capacity of the cooling device 2.

Moreover, in the case of the cooling device 2 that takes in the outside air from the outside air intake passage 9, the outside air intake amount and the air supply amount to the blowout port are the exhaust amount Qe from the ceiling exhaust port 11.
Therefore, in addition to the above-mentioned increase in the required cooling capacity, a large device capacity is also required for air transportation.
In order to obtain the desired cooling effect, there is still a problem that the equipment cost and running cost are high.

In view of the above situation, the main object of the present invention is to reduce the equipment cost and running cost by adopting a rational ventilation structure, while achieving a high cooling effect in the cooling target area in the lower part of the building space. The point is to be able to obtain.

[0011]

[Means for Solving the Problems]

[Invention of Claim 1] In the invention of Claim 1, the cooling target area in the lower part of the building space is limitedly cooled by the cooling device, whereas the cooling target area in the building space is higher than the cooling target area. As for the part, the outside air introduction port is used to introduce the outside air to a position lower than the ceiling exhaust port and higher than the cooling target area, while indoor air is exhausted to the outside from the upper end of the building space by the ceiling exhaust port. , This allows
A part above the cooling target area is ventilated in a form in which the introduced outside air is ventilated from the outside air introduction port to the ceiling exhaust port.

Therefore, according to the first aspect of the present invention, as shown in the experimental result of FIG. 3 regarding the temperature distribution in the building space, the above-mentioned conventional equipment that simply discharges hot air from the ceiling exhaust port is used. In comparison, the outside air ventilation from the outside air inlet to the ceiling exhaust can effectively suppress the temperature rise of the roof, reduce the heat radiation from the inside of the roof to the cooling target area, and more than the cooling target area. It is also possible to more effectively achieve lowering the temperature of the upper portion to lower the temperature of the entire building space including the cooling target area.

Moreover, since the outside air introduced into the position higher than the cooling target area by the outside air introduction port is discharged to the outside through the ceiling exhaust port, the amount of exhaust air from the ceiling exhaust port is reduced as in the conventional equipment described above. It is also possible to avoid a situation where a corresponding amount of outside air flows into the cooling target area and the load of outside air increases, and by doing so, the required cooling capacity of the cooling device is reduced, and the device cost and running cost are reduced. It is possible to obtain a high cooling effect in the cooling target area in the lower part of the building space while reducing the above.

Further, when a cooling device for taking in the outside air from the outside air intake passage is adopted as the cooling device, the outside air intake amount from the outside air intake passage and the air supply amount to the blowout port are reduced. , It is not necessary to include the outdoor exhaust air from the ceiling exhaust port, the amount of outside air intake in these cooling devices and the amount of air supply to the air outlet can be reduced, and the device required capacity for air transfer can also be reduced. This makes it possible to more effectively achieve the reduction of the device cost and the running cost together with the reduction of the required cooling capacity.

[Invention of Claim 2] In the invention of Claim 2, the indoor fan is forcibly exhausted from the ceiling exhaust port by an exhaust fan, so that the outside air introduction port extends to the ceiling exhaust port. The effect of reducing the heat radiation from the inner surface of the roof to the cooling target area by reducing the temperature rise of the roof by lowering the temperature of the part above the cooling target area. Enhances the effect of lowering the temperature of the building space as a whole.

Therefore, according to the second aspect of the invention, the required cooling capacity can be reduced more effectively.

[Invention of Claim 3] In the invention of Claim 3, the diffusion of the inflowing outside air from the outside air introduction port to the lower side is controlled by a plate-like control provided on the lower edge side of the outside air introduction port. This is suppressed by the air blower, which prevents the cooling load in the cooling target area from increasing due to the mixture of the inflowing outside air and the air in the cooling target area due to the downward diffusion.

Therefore, according to the third aspect of the invention, the required cooling capacity can be reduced more effectively.

[Invention of Claim 4] In the invention of Claim 4, the roof toward the cooling target area is provided by the radiation blocking member provided in the air path from the outside air introduction port to the ceiling exhaust port. It receives the heat radiation from the inner surface, and also suppresses the temperature rise of the radiation blocker itself by the introduced outside airflow from the outside air inlet to the ceiling exhaust port, and reheat radiation from this radiation blocker to the cooling target area. Prevent.

Therefore, according to the fourth aspect of the present invention, it is possible to further reduce the heat radiation from the roof side to the cooling target area, and it is possible to more effectively achieve the intended reduction of the required cooling capacity.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a cooling facility in a building with a high roof such as a factory. While the lower part of the building space 1 is a work area for personnel, the working area of this lower part is a cooling target area. As the area 1a, the cooling target area 1a is limitedly cooled by the cooling device 2. In the figure, M indicates a working device as a heat source.

Reference numeral 3 is a return air port arranged at the lower part of the cooling target area 1a, 4 is an outlet port arranged at the upper part of the cooling target area 1a, and the cooling device 2 is the cooling target area 1a sucked from the return air port 3. The air RA1 in the region is sent to the air conditioner 6 through the return air passage 5, is cooled by this air conditioner 6, and the air SA1 cooled by this air conditioner 6 is sent to the air outlet 4 through the air supply air passage 7. The target cooling area 1a is cooled by being blown out from the outlet 4 and supplied to the target cooling area 1a. That is, in this example, a circulation type cooling device is adopted as the cooling device 2.

Reference numeral 8 is an exhaust passage for exhausting a part of the intake air RA1 from the return air outlet 3 to the outside of the system, and 9 is an intake passage for the outside air OA1. The outside air OA1 introduced from the outside air intake passage 9 is shown.
Is the intake air RA after a part of the air is divided into the exhaust passage 8.
Along with 1, the air is cooled by the air conditioner 6 and then blown out and supplied to the cooling target area 1a. That is, with the partial exhaust of air through the exhaust passages 8 and the intake of the outside air OA1 through the outside air intake passage 9, the cooling target area 1a is ventilated in parallel with cooling.

On the other hand, in the building space 1, the cooling target area 1
Regarding the portion 1b above a, the ceiling exhaust port for forcibly exhausting the indoor air RA2 (that is, the air in the portion 1b above the cooling target area 1a) from the upper end of the building space 1 to the outside by the exhaust fan 10. 11 is provided on the roof 12, and a plurality of outside air introduction ports 13 for introducing outside air OA2 to a position lower than the ceiling exhaust port 11 and higher than the cooling target area 1a are dispersed in the peripheral portion of the indoor space 1 to form side walls. Part 1
4 is provided, so that as the exhaust fan 10 operates,
The inflowing outside air OA2 from the outside air inlet 13 is connected to the outside air inlet 1
A part 1b above the cooling target area 1a is ventilated in a form in which air is ventilated from 3 to the ceiling exhaust port 11.

That is, the ventilation of the outside air OA2 from the outside air introduction port 13 to the ceiling exhaust port 11 suppresses the temperature rise of the roof 12 due to solar radiation, and the inside of the roof 12 toward the cooling target area 1a is controlled. To reduce the temperature of the portion 1b above the cooling target area 1a,
The temperature of the interior space 1 including the cooling target area 1a is lowered as a whole, whereby the required cooling capacity of the cooling device 2 is made small, and the outside air intake from the outside air intake passage 9 in the cooling device 2 is also performed. The amount of air supply to the air outlet 4 and the amount of air supplied to the air outlet 4 are limited to the required amount in the cooling target area 1a, while achieving a high cooling effect in the cooling target area 1a in the lower part of the building space 1. There is.

As a result of the experiment, the ratio Qe / Qs of the exhaust air amount Qe from the ceiling exhaust port 11 to the air supply amount Qs from the air outlet 4 to the cooling target area 1a is about 0.4 to 0.6. The increase in the effect of reducing the required cooling capacity (in other words, the increase in the effect of increasing the cooling effect on the cooling target area 1a) is remarkably observed with the increase of 0.4 to 0.4.
If it exceeds 0.6, the increase in this effect tends to reach a ceiling and tends to become slower. From this, the above ratio Qe / Q
As s, considering the required power of the exhaust fan 10 and the like,
A value between 0.2 and 0.7, more preferably 0.3 to
A value between 0.6 is suitable.

At the lower edge side of the outside air inlet 13, the inflowing outside air OA2 from the outside air inlet 13 is prevented from diffusing downward, and the inflowing outside air OA2 is directed obliquely upward toward the ceiling exhaust port 11. Guide to the plate 1
5 is provided to prevent the cooling load of the cooling target area 1a from increasing due to the mixing of the inflowing outside air OA2 and the in-area air RA1 of the cooling target area 1a due to this downward diffusion, and at the same time, the outside air introduction port 13 The outside air ventilation from the ceiling to the ceiling exhaust port 11 is made smooth to promote the above-mentioned heat radiation reduction effect and temperature reduction effect.

[Other Embodiments] Next, other embodiments will be listed. As shown in FIG. 2, in the air path from the outside air inlet 13 to the ceiling exhaust port 11, a plate-like or net-like radiation blocker 16 that receives heat radiation from the inner surface of the roof 14 toward the cooling target area 1a is provided. The heat radiation from the roof side with respect to the cooling target area 1a may be further effectively reduced.

In the above-described embodiment, the example in which the indoor air RA2 is forcedly exhausted from the ceiling exhaust port 11 by the exhaust fan 10 has been shown, but in some cases, the exhaust fan 10
May be omitted, and outside air ventilation from the outside air introduction port 13 to the ceiling exhaust port 11 may be performed by natural convection.

The number and the specific shape of the ceiling exhaust ports 11
The structure can be modified in various ways, and the number of arrangements of the outside air introduction port 13 for introducing the outside air OA2 at a position lower than the ceiling exhaust port 11 and higher than the cooling target area 1a, specifically, Shape / structure, and ceiling exhaust port 11
The relative arrangement height with respect to the cooling target area 1a can be variously changed.

In the above-described embodiment, in the configuration of the cooling device 2, the air outlet 4 is arranged above the cooling target area 1a and the return air port 3 is arranged below the cooling target area 1a. On the contrary, the outlet 4 may be arranged in the lower part of the cooling target area 1a, and the return air port 3 may be arranged in the upper part of the cooling target area 1a. The arrangement in the target area 1a can be modified in various ways.

The cooling device 2 is not limited to the type in which air is circulated between the cooling target area 1a and the air conditioner 6 via the external air passages 5 and 7 as in the above embodiment.
For example, various types of cooling devices such as a direct-blowing type package air conditioner and a fan coil unit installed in the cooling target area 1a can be adopted.

The present invention is particularly suitable as cooling equipment for high-roof buildings such as factories and indoor stadiums, but the use of the cooling target area 1a in the building is not limited to a specific use.

In the claims, reference numerals are provided for convenience of comparison with the drawings, but the present invention is not limited to the configuration shown in the accompanying drawings.

[Brief description of drawings]

[Figure 1] Configuration diagram of the cooling equipment in the building

FIG. 2 is a facility configuration diagram showing another embodiment.

FIG. 3 is a graph showing experimental results.

[Figure 4] Configuration diagram of conventional equipment

[Explanation of symbols]

 1 Indoor Space 1a Area to be Cooled 2 Air Conditioner RA2 Indoor Air 11 Ceiling Exhaust Port OA2 Outside Air 13 Outside Air Inlet Port 10 Exhaust Fan 15 Plate-shaped Air Conditioner 16 Radiation Stopper

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masatoyo Oshiro 2-6-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo In-house Co., Ltd. (72) Masanobu Saito 2-6-1 Nishishinjuku, Shinjuku-ku, Tokyo In-house Co., Ltd. (72) Inventor Koji Morioka 2-6-1, Nishi-Shinjuku, Shinjuku-ku, Tokyo In-house Co., Ltd.

Claims (4)

[Claims] 1. A cooling device (2) for cooling the cooling target area (1a) with a lower layer portion of the building space (1) as a cooling target area (1a), and an upper end portion of the building space (1). From indoor air (RA2)
And a ceiling exhaust port (11) for exhausting air to the outside, wherein the ceiling exhaust port (1) is provided in the building space (1).
Outside air introduction port (1) for introducing outside air (OA2) to a position lower than 1) and higher than the cooling target area (1a)
Cooling equipment equipped with 3). 2. The cooling facility according to claim 1, further comprising an exhaust fan (10) for forcibly exhausting indoor air (RA2) from the ceiling exhaust port (11). 3. A plate-like air conditioner (15) is provided on the lower edge side of the outside air inlet (13) to prevent the inflowing outside air (RA2) from the outside air inlet (13) from diffusing downward. The cooling equipment according to claim 1 or 2, which is provided. 4. A radiation blocker (16) for receiving heat radiation from the inner surface of the roof toward the cooling target area (1a) in an air path extending from the outside air introduction port (13) to the ceiling exhaust port (11). ) Is provided, the cooling equipment according to claim 1, 2 or 3.