JPH0659745U - Outlet unit - Google Patents

Abstract

(57) [Summary] [Purpose] To propose an air outlet unit that has a superior sound absorbing effect. [Structure] In a blowout port unit that changes the direction of the blown airflow in a housing and blows it out indoors, while providing a heat insulating material such as glass wool in the housing,
A porous metal sound absorbing material is laminated on the heat insulating material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air flow outlet unit.

[0002]

[Prior art]

 Conventionally, an outlet unit as shown in FIG. 4 has been known. The air outlet unit is mainly attached to the ceiling, and in the space inside the housing 1 from the air outlet 5 to the air outlet 9, it changes the direction of the blown air flow and blows it out into the room.

This air outlet unit has a glass wool 11 as a heat insulating material in its housing 1 in order to prevent the air flow, which has been subjected to air conditioning such as air conditioning, from being heated or cooled conversely due to the influence of ambient temperature. Is installed inside. On the other hand, the glass wool 11 also serves as a sound absorbing material in order to prevent abnormal noises such as fan rotation noises and pipe vibration noises generated in an air conditioner to be air-conditioned from entering the room.

Certainly, according to this air outlet unit, the glass wool 11 can provide the heat insulating effect, and the influence of the ambient temperature and the like can be reduced as a low price. However, the abnormal noises such as the rotation noise of the fan and the vibration noise of the pipe were not sufficiently absorbed by the glass wool 11 in some cases, so that the noise sometimes entered the room.

[0005]

[Problems to be solved by the device]

 Therefore, it is an object of the present invention to propose an air outlet unit having a better sound absorbing effect than in the past.

[0006]

[Means for Solving the Problems]

 In order to solve the above-mentioned problems, this invention takes the following technical means. (Means of the invention according to claim 1) The air outlet unit according to the present invention is an air outlet unit that changes the direction of an air flow that has been blown in the housing and blows it out indoors. This is characterized in that the heat insulating material is internally provided, and a multi-layered metal sound absorbing material is layered on the heat insulating material. (Means of the invention according to claim 2) In the air outlet unit of the present invention, the space in the housing has a relatively large volume with respect to a region communicating from the ventilation port opened in the housing to the air outlet. It is characterized by the formation of a temporary retention area.

[0007]

[Action]

 As a result of adopting the above means, the present invention has the following actions. (Operation of the invention according to claim 1) Since the blowout unit of this invention has a heat insulating material such as glass wool in its housing, it has the same heat insulating effect as the conventional one, and the conventional glass wool alone is not sufficient. The existing sound absorbing effect can be improved by the porous metal sound absorbing material layered on the heat insulating material. (Operation of the device according to claim 2) In addition to the above operation, the following operation is provided.

The blown airflow is in a temporary retention area of the airflow formed in a space in the housing having a relatively large volume with respect to an area communicating from the ventilation port opened in the housing to the air outlet. At that time, before the air is blown out into the room, there is a temporary negotiation with the porous metal sound absorbing material. Therefore, in the past, the airflow simply passed through the inside of the housing by changing its direction. Abnormal noise can be further reduced.

[0009]

【Example】

 The configuration of the present invention will be described below with reference to the drawings showing preferred embodiments. As shown in FIGS. 1 to 3, the air outlet unit according to this embodiment has a cylindrical casing 1 formed of a 1.2 mm thick zinc iron plate. A top plate 2 of the cylindrical casing 1 is provided with a mounting hole 3 for fixing to a ceiling or the like, and a side face 4 of the casing 1 is provided with a vent hole 5 for air flow. A connection cylinder 6 for connecting with a pipe is fixed to this opening. The diameter of the connecting tube 6 is about 6/14 of the height of the cylindrical casing 1. Reference numeral 7 is a known air volume adjusting means. The bottom plate 8 is provided with a blowout port 9 having a diameter of about sixteenths of its diameter in the center, and a blowout pipe 10 is fixed to the blowout port 9. That is, in this air outlet unit, a step is formed between the cylindrical casing 1 and the air outlet cylinder 10. The height and diameter of the cylindrical casing 1 are formed to have substantially the same dimensions. The shape of the housing 1 is cylindrical in this embodiment, but other shapes such as a box shape may be used.

A glass wool 11 having a thickness of 25 mm is internally provided on the entire inner surface of the housing 1 as a heat insulating material. The glass wool 11 prevents the air stream, which has been subjected to air conditioning such as air conditioning, from being heated or cooled conversely due to the influence of the ambient temperature. As the heat insulating material, other materials may be used without being limited to the glass wool 11, but the glass wool 11 is advantageous in terms of economy.

Further, a porous metallic sound absorbing material is layered on almost the entire surface of the glass wool 11. As this porous metal sound absorbing material, a 1.5 mm thick aluminum sound absorbing plate 12 (manufactured by Unix Co., Ltd., trade name PORE) was used. The aluminum sound absorbing plate 12 is made by rolling an aluminum non-woven fabric into a sandwich with an expanded metal and has continuous pores. By the way, in the glass wool 11, the fibers tend to become fine dust as it ages, and in the past, this may have scattered into the room to contaminate the air. The scattering of fine fibers can be prevented by the aluminum sound-absorbing plate 12 layered on top of each other.

Since this glass outlet unit has the glass wool 11 inside the housing 1, it has the same heat insulating effect as the conventional one, and the glass wool 11 has a sound absorbing effect which was not sufficient with the conventional glass wool 11. On the other hand, by the aluminum sound absorbing plate 12 that is layered, it is improved by about 52% up to 500 Hz, and about 70 to 90% at frequencies higher than that.

Next, in this air outlet unit, the volume of the space inside the housing 1 is made larger than that of the conventional one shown in FIG. In other words, the space inside the conventional housing 1 has a small volume of about the area communicating with the ventilation port 5 to the air outlet 9, and the air flow simply passes through this space. Since the volume is relatively large with respect to the area, a temporary retention area for the air flow is formed.

Therefore, the blown air flow is agitated in the temporary retention area and has a temporary negotiation with the aluminum sound absorbing plate 12 before being blown out into the chamber. In other words, in the past, the airflow simply passed through the inside of the housing 1 by changing its direction, but according to this embodiment, the airflow in the airflow is changed by the temporary negotiation with the aluminum sound absorbing plate 12. There is an advantage that abnormal noise can be further reduced.

Further, according to this air outlet unit, it is possible to obtain a sufficient sound absorbing effect without providing a rectifying plate, which is economically advantageous in terms of manufacturing.

[0016]

[Effect of device]

 The present invention has the above-mentioned configuration and has the following effects. (Effect of the device according to claim 1) The sound absorbing effect, which was insufficient with only glass wool, can be improved by the multi-porous metal sound absorbing material overlaid with the heat insulating material. An excellent outlet unit can be provided. (Effect of the device according to claim 2) In addition to the above effects, the following effects are also obtained.

Since the blown air flow is temporarily negotiated with the porous metal sound absorbing material, the abnormal noise in the air flow can be further reduced, so that the air outlet unit is further excellent in the sound absorbing effect. Can be provided.

[Brief description of drawings]

FIG. 1 is a partially cutaway perspective view for explaining an embodiment of an air outlet unit of the present invention.

FIG. 2 is a cut side view of the air outlet unit of FIG.

FIG. 3 is a cutaway plan view of the air outlet unit of FIG.

FIG. 4 is a cutting side view illustrating a conventional air outlet unit.

[Explanation of symbols]

 1 Case 5 Vent 9 Outlet 11 Glass wool

Claims (2)

[Scope of utility model registration request] 1. A blowout port unit that changes the direction of a blown air flow in a housing and blows it out indoors, wherein a heat insulating material such as glass wool is provided inside the housing, and On the other hand, an outlet unit characterized by layering a porous metal sound absorbing material. 2. The space in the housing has a relatively large volume with respect to the area communicating from the ventilation port opened in the housing to the air outlet, and a temporary retention area for the air flow is formed. Item 1. The outlet unit according to item 1.