JP2953311B2 - Ceiling chamber supply air conditioner - Google Patents

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-conditioning apparatus, and more particularly, to a ceiling-chamber air-conditioning apparatus that uses a ceiling space as a chamber and makes 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 has occurred due to various factors such as friction of the inner wall pipe when the air passes through these ducts and a change in duct cross-sectional shape.

[0003] In order to solve these problems,
By removing the duct in the ceiling and using the ceiling chamber method, the development of an air conditioner that reduces the space under the beam and reduces the height of the ceiling space is expected.

[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 to the outlet 2 so that the air is Pressure loss was caused by various factors such as friction of the inner wall pipe when passing through the duct and change in duct cross-sectional shape. For this reason, the capacity of the blower must be increased, which results in an increase in the size of the device, which leads to an increase in the space of the air conditioning machine room and the cost of the air conditioning equipment.

Therefore, in order to solve these problems,
By removing the duct in the ceiling and using the ceiling chamber method, the development of an air conditioner that reduces the space under the beam and reduces the height of the ceiling space is expected. However, by removing the duct in the ceiling, reducing the space under the beam, and lowering the height of the ceiling space, as the size of the space around the ceiling space becomes smaller, differences in the length and cross-sectional changes in the air flow path, etc. As a result, there is a problem in that a difference in pressure loss occurs, the static pressure in the ceiling space becomes uneven, and depending on the outlet at the end, even if the blowing capacity of the blower is slightly increased, the amount of blown air is insufficient.

[0006] The present invention has been made in view of such circumstances, and solves the problems of the prior art, to provide a ceiling chamber air supply air conditioner in which the static pressure in the ceiling becomes more uniform even under low beam dimensions. The purpose is to provide.

[0007]

According to the present invention, an end of an air supply duct from an air conditioner is connected to a ceiling space surrounded by a ceiling board and a floor slab immediately above the floor. In the ceiling chamber supply air conditioner that supplies the conditioned air into the room from each outlet attached to the ceiling board, the fireproof coating is applied to the flow of the conditioned air. Axis on the upstream side of the beam
It comprises a long-type cross-flow fan, balloon portion of the cross-flow fan
Is formed into a nozzle shape extending to the downstream space of the beam, and the conditioned air upstream of the beam is sent to the downstream side of the beam .
Thus, the air flow from the once-through fan causes the
It does not directly hit the part .

[0008]

According to the present invention, by operating the cross-flow fan installed on the beam, even when the air conditioner is installed in a state where the dimension under the beam is low, it is possible to maintain the wind force exceeding the pressure loss and to maintain the air flow direction. It is possible to supply the conditioned air from the upstream side to the downstream side via the space under the beam without difficulty, and it is possible to improve the blow-out air volume of the blow-out port, which has conventionally had a low blow-out amount.

Further, the use of the axially extending cross-flow fan has the effect of allowing the conditioned air to be blown not only in the axial direction of the cross-flow fan but also over a wide range, and the static pressure in the ceiling space becomes more uniform, so that each of the blow-out fans This has the effect of making the amount of air blown out of the mouth more uniform. Since the once-through fan outlet has a nozzle shape, when applied to a fire-resistant building structure in which a fire-resistant coating is formed on a beam, there is an effect that airflow does not directly hit these fire-resistant coatings.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a ceiling chamber supply air conditioner according to the present invention will be described with reference to FIGS. FIG. 1 is a sectional view showing the overall configuration of an embodiment using a once-through fan. FIG. 2 is a sectional view showing details in the vicinity of the once-through fan according to the embodiment of the present invention. 1 and 2, air conditioned by an air conditioner 10 in a machine room is blown to a first space portion 14 in a ceiling chamber formed between a floor slab 12 and a 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 blows out into the indoor space portion, and at the same time, passes through the space under the beam. The air is blown to the second space 16. When air moves from the first space portion 14 to the second space portion 16, it is possible to maintain the wind power exceeding the pressure loss by the function of the cross-flow fan 28 provided on the air conditioner 10 side of the first beam 20. In addition, the space under the beam, in which air has conventionally been difficult to flow, can be blown to the second space 16 without difficulty. Further, by the function of the once-through fan 28, a part of the conditioned air in the first space portion 14 is induced, and the ceiling board 24 and the once-through fan 28
And is fed into the second space 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, conditioned air having a flow rate that is closer to the blowing amount from the outlet (anemo) 22a is blown out from the outlet (anemo) 22b in the second space 16.

Are similarly blown from the second space portion 16 to the third space portion 18..., And not only the outlet 22 c arranged in the second space portion 16 but also the third space 18. The air outlets 22c arranged inside each blow out a more uniform amount of conditioned air as compared with the conventional example. Next, FIG. 3 shows an embodiment of a ceiling chamber air supply air conditioner in a case where a refractory coating is sprayed on a beam portion. The supply method of the conditioned air from the first space portion 14 to the second space portions 16 is the same, but the cross-flow fan cover 32 is used to prevent the fireproof coating for the fireproof building structure from scattering. Of the second space portion 16...
It has a nozzle shape that extends to the bottom, so that the airflow does not directly hit the refractory coating portion coated by spraying on the lower part of the beam.

[0012]

According to the present invention, since the cross-flow fan is interposed in the air flow path in the narrow space below the beam, the air-conditioning air flow can be maintained against the pressure loss in these air flow paths. Therefore, there is an effect that the amount of air blown out from the outlet, which has been reduced, can be secured.

[0013] By interposing the axial flow-through fan, the static pressure in the ceiling chamber can be made more uniform not only in the axial direction of the axial flow-through fan but also in the direction perpendicular to the axial direction. Thus, the effect that the amount of air blown from the air can be made more uniform over a wide range can be obtained. And, by making the shape of the once-through fan cover a nozzle shape, there is an effect of preventing scattering of the refractory coating in addition to these effects.

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

[Brief description of the drawings]

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

FIG. 2 is a sectional view showing details of a ceiling chamber air supply air conditioner of the embodiment of the present invention.

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

FIG. 4 is a cross-sectional view showing the entire configuration of a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Air conditioner 12 ... Floor slab 22a, 22b, 22c ... Outlet 24 ... Ceiling panel 28 ... Cross-flow fan 32 ... Nozzle

──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Junji Asai 1-1-1 Uchikanda, Chiyoda-ku, Tokyo Examiner, Hitachi Plant Construction Co., Ltd. Kazuto Tomioka (56) References JP-A-5-71765 (JP) JP-A-3-267636 (JP, A) JP-A-61-101734 (JP, A) JP-A-58-1556837 (JP, U) JP-A-59-191524 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) F24F 3/00

Claims (1)

(57) [Claims] 1. An end of an air supply duct from an air conditioner is connected to a ceiling space surrounded by a ceiling board and a floor slab directly above the floor, and the entire ceiling space is used as an air supply chamber. In a ceiling chamber air supply air conditioner that supplies conditioned air into the room from each of the attached outlets, a shaft is installed upstream of the beam with fireproof coating against the flow of conditioned air.
It comprises a long-type cross-flow fan, balloon portion of the cross-flow fan
Is formed into a nozzle shape extending to the downstream space of the beam, and the conditioned air upstream of the beam is sent to the downstream side of the beam .
Thus, the air flow from the once-through fan causes the
A ceiling-chamber air-conditioning apparatus characterized in that it does not directly hit a part .