JPS5829804Y2 - Variable air volume unit - Google Patents

Description

[Detailed description of the invention] This invention relates to a variable air volume unit used for indoor air conditioning.

When a variable air volume device is installed in a room and the air volume is controlled in each individual room by moving a manual knob to high, medium, or low, noise from the variable air volume device becomes a problem. There is.

In particular, hotel rooms are noisier than offices, and even if a static pressure of 60 mmAg is applied, NC-30 must be maintained in the room.

It is also required to have excellent constant airflow performance (the airflow does not change even if the static pressure is changed) by operating a manual knob.

This idea was devised in response to the above requirements, and
The noise is extremely low, so you won't have to worry about noise even when installed in an office or hotel guest room. The aim is to provide a variable air volume unit with a variable structure.

The invention for the above purpose is to provide an inlet and an outlet at both ends of a casing lined with a sound-deadening material, and a plurality of sound-deadening plates are vertically and alternately protruded across the flow path inside the outlet. A variable air volume device is installed inside the duct fixed between the upper end of the inner sound deadening plate bent inward and the above-mentioned inlet, and rotated by a motor on the side of the casing. A rotary shaft for adjusting the air volume blown by the variable air volume device via a member is supported by the bottom of the casing and the upper end of the sound deadening plate.

This invention will be explained in detail below using illustrated examples.

1 is a box-shaped casing with an inlet 2 and an outlet 3 on both sides.
and are provided in the same position.

The inside of the casing 1 is lined with a generally used sound deadening material 4, and a flow path 5 is provided inside the air outlet side.
A plurality of sound deadening plates 6 and 7 are provided vertically and alternately in a protruding manner to form the flow path 5 in a meandering shape.

Reference numeral 8 denotes a variable air volume device, which is set inside a duct 9 fixed between the upper end 7a of the inner sound deadening plate 7 bent horizontally inward and the inlet 2, and between the upper end 7a and the bottom of the casing. The amount of air blown is changed from strong to medium to weak by the rotating shaft 10 and the member 11, which are connected to the rotating shaft 10 supported by the rotating shaft 10 via a member 11 and rotated by a motor 12 on the side of the casing. is now possible.

Although the details of the variable air volume device shown in the figure are omitted, it is composed of three elements: an outer cylinder, an inner cylinder, and a wind pressure plate, and air flows through slits with the same cross-sectional area provided in the outer cylinder and the inner cylinder. , a constant flow rate can be obtained by reducing the flow path area of the slit, and the flow rate can be varied by changing the cross-sectional area of the slit, but in this invention, the use of the above type is specifically limited. The structure of the variable air volume device is arbitrary because other types of devices can also be installed inside.

As mentioned above, this idea has an inlet 2 and an outlet 3 on both sides.
A casing 1 provided with
Since the variable air volume device 8 is installed inside the duct 9 which is fixed across the bending upper end 7a of the inner sound deadening plate 7, the noise generated in the air supply path and the noise generated when passing through the variable air volume device are reduced. etc. are muffled inside the casing and become less loud.

In addition, sound deadening plates 6 and 7 are vertically and alternately protruded inside the air outlet 3 to make the flow path 5 meander.
The noise reduction is even more remarkable, and the indoor noise level is reduced as shown by the solid line in Figure 3, providing a sufficient silencing effect to be used even in the noisiest hotel rooms.

In addition, the motor-driven rotating shaft 10 that adjusts the air volume of the movable air volume device is connected to the bottom of the casing and the upper end 7 of the sound deadening plate 7.
Since the casing is supported over the casing, there is no need to provide a support member within the casing, the structure is simple, the casing is compact, and it has the advantage of being easy to store in a ceiling or the like.

[Brief explanation of the drawing]

The drawings show an embodiment of the variable air volume unit according to this invention. Fig. 1 is a sectional view, Fig. 2 is a plan view of a half section, and Fig. 3 is a table of indoor noise levels by the variable air volume device. be. 1... Casing, 2... Inlet, 3
...Air outlet, 4...Sound deadening material, 5...
...Flow path, 6,7... Sound deadening plate, 7a...
...Top end of sound deadening plate, 8...Variable air volume device, 9.
...Duct, 10...Rotation axis, 11...
...Parts, 12...Motor.

Claims (1)

[Scope of utility model registration request] An inlet and an outlet are provided at both ends of a casing lined with sound-deadening material, and a plurality of sound-deadening plates are vertically and alternately protruded across the flow path inside the outlet to form a meandering flow path. At the same time, a variable air volume device is installed in a duct fixed between the upper end of the inner sound deadening plate bent inward and the above inlet, and is rotated by a motor on the side of the casing, and is variable via a member. The rotation axis that adjusts the air volume of the air volume device is
A variable air volume unit supported by the bottom of the casing and the top of the sound deadening plate.