JPH085101A - Air-conditioning system for supplying air through ceiling chamber - Google Patents

Abstract

PURPOSE:To improve uniformity in the quantity of air let out from outlets and in a static pressure inside the ceiling even with a low-beam dimension, to enable to send air to a larger extent and to prevent scattering of a fire- resistant cover. CONSTITUTION:Cross flow fans 28 are provided at beam parts 20 in a ceiling chamber between an air conditioner 10 and outlets 22a, 22b and 22c, and by operating the fans, the quantities of air let out from the outlets 22a, 22b and 22c can be maintained even when dimensions under beams are small. Air can be sent to a larger extent by making the cross flow fans 28 be of a long shaft. Besides, the outlet of the cross flow fan 28 is shaped like a nozzle, so that an airflow may not hit directly against a fire-resistant cover inside the ceiling chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceiling chamber air supply / air conditioner, and more particularly to a ceiling chamber air supply / air conditioner which uses a ceiling space as a chamber to make the static pressure in the chamber more uniform.

[0002]

2. Description of the Related Art As a conventional air conditioning method, as shown in FIG. 4, air conditioned by an air conditioner 1 is supplied to a room through an air supply duct 3 to an outlet 2. Then, pressure loss occurs due to various factors such as inner wall tube friction and duct cross-sectional shape change when air passes through these ducts.

Therefore, in order to solve these problems,
By removing the duct in the ceiling and adopting the ceiling chamber system, it is expected to develop an air conditioner that reduces the space under the beam and lowers the height of the ceiling space.

[0004]

However, in the means as shown in FIG. 4, the air conditioned by the air conditioner 1 is supplied to the room through the air supply duct 3 up to the air outlet 2, so that the air is Pressure loss was caused by various factors such as inner wall pipe friction and duct cross-sectional shape change when passing through the duct. For this reason, the capacity of the blower must be increased, which leads to an increase in the size of the device, leading to an increase in the air conditioning machine room space and air conditioning equipment costs.

Therefore, in order to solve these problems,
By removing the duct in the ceiling and adopting the ceiling chamber system, it is expected to develop an air conditioner that reduces the space under the beam and lowers the height of the ceiling space. However, by removing the duct in the ceiling, reducing the space under the beam, and lowering the height of the ceiling space, the length of the air flow path and the difference in cross-section change, etc. Therefore, there is a problem in that the generated pressure loss becomes different, the static pressure in the ceiling space becomes non-uniform, and depending on the outlet at the end, even if the blower capacity of the blower is increased to some extent, the blown air volume is insufficient.

The present invention has been made in view of the above circumstances, and solves the problems of the prior art, and provides a ceiling chamber air supply / air conditioner in which the static pressure in the ceiling is more uniform even with a low beam size. The purpose is to provide.

[0007]

In order to achieve the above object, the present invention connects an end of an air supply duct from an air conditioner to a ceiling space directly above which is surrounded by a ceiling board and a floor slab directly above. In the ceiling chamber air supply air conditioner that supplies the conditioned air into the room from each outlet installed on the ceiling board, the entire space above the ceiling is used as the air supply chamber, and the upstream side of the beam with respect to the flow of the conditioned air. Equipped with a cross-flow fan,
The feature is that the conditioned air on the upstream side of the beam is sent from the space under the beam to the downstream side of the beam.

[0008]

According to the present invention, by operating the cross-flow fan installed on the beam portion, even when the air conditioner is installed in a state where the dimension under the beam is low, it is possible to maintain the blast force exceeding the pressure loss, and In addition to the effect that air-conditioned air can be comfortably supplied from the upstream side to the downstream side through the space below the beam, it is possible to improve the amount of air blown from the air outlet, which was conventionally low.

Further, since the through-flow fan having the axial length is used, the conditioned air can be blown not only in the axial direction of the through-flow fan but also over a wide range, and the static pressure in the ceiling space becomes more uniform, so that each blowoff This has the effect of making the amount of air blown from the mouth more uniform. Further, since the cross-flow fan outlet has a nozzle shape, when applied to a fireproof building structure in which a fireproof coating is formed on a beam, there is an effect that an airflow does not directly impinge on these fireproof coatings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ceiling chamber supply air conditioner of the present invention will be described with reference to FIGS. FIG. 1 is a sectional view showing the overall structure of an embodiment using a cross-flow fan. FIG. 2 is a sectional view showing details of the vicinity of the cross-flow fan of the embodiment of the present invention. In FIG. 1 and FIG. 2, the air conditioned by the air conditioner 10 in the machine room is blown to the first space portion 14 in the ceiling chamber formed between the floor slab 12 and the ceiling. The conditioned air passes through the inside of the first space portion 14, passes through the outlet (anemo) 22a connected to the first space portion 14, and a part of the conditioned air is blown out into the indoor space portion, and at the same time, passes through the under-beam space portion. The air is blown into the second space portion 16. When the air moves from the first space portion 14 to the second space portion 16, the function of the cross-flow fan 28 provided on the air conditioner 10 side of the first beam 20 can maintain the wind force that exceeds the pressure loss. Therefore, the space under the beam, which has conventionally been hard to flow air, can be blown to the second space portion 16 without difficulty. Further, due to the function of the cross-flow fan 28, a part of the conditioned air in the first space portion 14 is attracted to the ceiling board 24 and the cross-flow fan 28.
It passes through the gap between them and is fed into the second space portion 16. Then, the static pressures of the first space portion 14 and the second space portion 16 are balanced in a direction in which they become equal. As a result, the conditioned air having an air volume approximate to the amount of air blown out from the air outlet (anemo) 22a is blown out from the air outlet (anemo) 22b in the second space portion 16.

In this way, the second space 16 is also similarly blown to the third space 18, so that not only the blowout port 22c arranged in the second space 16 but also the third space 18 is blown. The blowout port 22c arranged inside blows out a more uniform amount of conditioned air as compared with the conventional example by the same action. Next, FIG. 3 shows an embodiment of the ceiling chamber supply air conditioner in the case where a refractory coating is sprayed on the beam portion. The method of supplying the conditioned air from the first space portion 14 to the second space portion 16 ... Is the same, but in order to prevent the fireproof coating for the fireproof building structure from being scattered, the once-through fan cover 32. The balloon 33 of the second space 16 ...
The nozzle shape extends to the point where the airflow does not directly hit the fireproof coating that is coated by spraying on the lower part of the beam.

[0012]

According to the present invention, since the through-flow fan is provided in the air flow paths in the narrow space under the beam, the conditioned air flow can be maintained against the pressure loss in these air flow paths. Therefore, there is an effect that it is possible to secure the amount of air blown out from the air outlet that has been reduced.

Further, by interposing the axial-length cross-flow fan, the static pressure in the ceiling chamber can be made more uniform not only in the axial direction of the axial-length cross-flow fan but also in the direction orthogonal to this axis. It is possible to obtain the effect of making the amount of air blown from the air blower uniform over a wider range. Further, by making the shape of the once-through fan cover a nozzle shape, there is an effect of preventing scattering of the fireproof coating in addition to these effects.

Since the ceiling chamber can be effectively used as an air flow path, the present invention can suppress the floor height of the building, which is advantageous from the viewpoint of reducing construction cost, duct equipment cost and the like.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing the overall configuration of an embodiment of a ceiling chamber supply air conditioner according to the present invention.

FIG. 2 is a cross-sectional view showing details of a ceiling chamber supply air conditioner according to an embodiment of the present invention.

FIG. 3 is a cross-sectional view showing details of another embodiment of the ceiling chamber supply air conditioner of the embodiment of the present invention.

FIG. 4 is a cross-sectional view showing an overall configuration of a conventional example.

[Explanation of symbols]

 10 ... Air conditioner 12 ... Floor slab 22a, 22b, 22c ... Blowout port 24 ... Ceiling panel 28 ... Cross-flow fan 32 ... Nozzle

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kozo Izawa 1-1-14 Kanda, Uchikanda, Chiyoda-ku, Tokyo Within Nihon Plant Construction Co., Ltd. (72) Junji Asai 1-1-1 Uchikanda, Chiyoda-ku, Tokyo No. 14 at Hitachi Plant Construction Co., Ltd.

Claims (3)

[Claims] 1. An end of an air supply duct from an air conditioner is connected to a ceiling space directly above, which is surrounded by a ceiling board and a floor slab directly above the floor, and the entire ceiling space directly above serves as an air supply chamber, and the ceiling is provided. A ceiling chamber supply air conditioner for supplying conditioned air into the room from each outlet attached to a board, wherein a cross-flow fan is provided on the upstream side of the beam with respect to the flow of the conditioned air, and is located on the upstream side of the beam. A ceiling chamber supply air conditioner characterized by sending conditioned air from a space below a beam to the downstream side of the beam. 2. The cross-flow fan is an axial-long cross-flow fan, a space in which air flows is provided between the ceiling boards, and the axial-long cross-flow fan is operated to partially attract ambient air, The ceiling chamber supply air conditioner according to claim 1, wherein the conditioned air is sent into the space on the downstream side. 3. The ceiling chamber supply air according to claim 2, further comprising: a refractory coating formed on the beam, and a nozzle-shaped through-flow fan blowing section for preventing the refractory coating from scattering. Harmony device.