JPH0517128Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] The present invention is a filter unit with a blower that simultaneously muffles the noise caused by the blower and the noise around the air suction port, and diffuses and rectifies the air from the blower. This relates to a filter unit that can be used.

[Prior Art] Conventionally, as a means of silencing noise caused by a blower,
A filter 32 is attached to the lower surface of the casing 31 as shown in FIG.
A filter unit 37 with a blower is provided with a blower 34 communicating with the discharge hole 33 on the outer side of the filter unit 3, and a blower box 36 having a suction hole 35 bored on the other side is fixed. A sound deadening sheet 38 made of glass wool or the like is pasted and fixed on the inner wall surface of the casing 31 to absorb and muffle the noise from the blower 34 inside the casing 31, and also to absorb and muffle the noise from the blower 34 inside the blower box 36 equipped with the blower 34. A sound deadening sheet 39 made of glass wool or the like similar to that described above is also adhered and fixed to the wall surface to absorb and muffle the noise of the blower 34 itself and the noise generated when air is sucked near the suction hole 35. That is, conventionally, the noise was silenced in two stages: inside the blower box 36 and inside the casing 31.

Furthermore, a buttful plate 40 for suppressing the dynamic pressure of the air flow is attached to the casing 31 in front of the discharge hole 33 that discharges the air blown from the blower 34 into the casing 31. As shown, the airflow from the discharge hole 33 is changed to a downward airflow in the baffle plate 40, and
By changing the current to the rear of 0, the full plate 4
The configuration was such that turbulent flow was generated behind the filter 0, air further flowed in from the rear, and the air on the downstream side was rectified and sent to the filter 32.

[Problems to be Solved by the Invention] However, in the above-mentioned conventional device, the noise of the blower 34 is muffled by each of the sound deadening sheets 38 and 39, but the effective dimension of the filter 32 (L in the figure)
) becomes long, it may not be possible to install multiple blowers 34 to obtain the required air volume, and there is also the problem that the airflow distribution cannot be made uniform if the effective dimension of the filter 32 becomes long.

The present invention aims to solve the above problems.

[Means for Solving the Problems] The present invention includes fixing a blower box equipped with a blower and having blower openings on both sides above a casing with a filter fixed to the bottom surface, and
A pyramid-shaped or cone-shaped diffuser plate is provided on the inside of the lower surface of the casing and protrudes upward so that the opening edge of the diffuser plate is located inside of the air blowing opening, and a noise reduction plate is provided on the upper surface of the diffuser plate and the inner wall surface of the casing. The above-mentioned problem was solved by adopting a method of pasting and fixing the sheet.

[Function] According to the present invention having the above configuration, a blower and a pyramid-shaped or cone-shaped diffuser plate are installed in the casing, and a sound-deadening sheet is adhered and fixed on the inner wall surface of the casing and the diffuser plate. , the diffuser plate can simultaneously rectify and diffuse the airflow and muffle the noise from the blower, etc.

[Embodiment] An example of the implementation of the present invention will be described in detail with reference to the drawings.A filter 3 is attached and fixed to the lower surface of the opening 2 in the lower part of the casing 1, and an air suction port is provided on the upper plate 4 of the casing 1. 5, a blower box 8 equipped with one or more blowers 6 and having blower openings 7 on both sides is fixedly installed on the lower surface of the air inlet 5, A pyramid-shaped or cone-shaped diffuser plate 9 is provided protruding upward from its edge so that its opening edge 9' is positioned inside the air blowing opening 7, and the upper surface of the diffuser plate 9 and A filter unit 11 with a blower is formed by adhering and fixing a sound deadening sheet 10 such as glass wool to the inner wall surface of the casing 1, respectively.

When the effective dimension L' of the filter is required for multiple filter units 11 with blowers, the air suction ports 5 of the filter units 11 with blowers are connected in parallel with the duct D as shown in Fig. 2. use.

To explain the operation of the embodiment, air sucked by the blower 6 is blown into the casing 1 through the blower opening 7. Since the opening edge 9' of the pyramid-shaped or conical diffuser plate 9 is located inside the ventilation opening 7, the air blown into the casing 1 is always blocked by the diffuser plate 9. The turbulent air flows in the casing 1 above the diffusion plate 9, and the turbulent air is pushed out through the opening 9 of the diffusion plate 9.
The air is guided along the lower surface of the diffuser plate 9 from a, and is diffused and rectified in the direction of the filter 3 and sent. During this time, the noise emitted from the blower 6 and the noise near the air suction port 5 are suctioned and muffled by the sound deadening sheet 10.

[Effects of the invention] Since the present invention is as described above, it is possible to simultaneously diffuse and rectify the air flow using the diffuser plate, to muffle the noise from the blower and the noise near the air suction port, and to reduce the effective size of the filter. Even if a long filter is required, the required number of filter units can be installed in the duct.In this case, each filter unit is also equipped with a blower, so the required air volume can be obtained and the airflow can be diffused and rectified. Since this is done for each filter unit, the airflow distribution can also be made uniform.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view, FIG. 2 is a longitudinal sectional view showing another usage example, and FIG. 3 is a longitudinal sectional view showing a conventional filter unit. In the figure, 1 is a casing, 3 is a filter, 6 is a blower, 8 is a blower box, 9 is a diffuser plate, 9'
1 is an opening edge, and 10 is a sound deadening sheet.

Claims (1)

[Scope of utility model registration request] A blower box equipped with a blower and with air blowing openings on both sides is fixed above the casing with a filter fixed to the lower surface, and a pyramid-shaped or conical diffuser plate is installed inside the lower surface of the casing.
A filter unit that protrudes upward so that its opening edge is positioned inside the air blowing opening, and has a sound deadening sheet adhered and fixed to the upper surface of the diffusion plate and the inner wall surface of the casing.