JPS5966323A - Exhaust apparatus of electric dust collector - Google Patents

Abstract

PURPOSE:To attenuate noise energy, by providing a polygonal case in an exhaust chamber formed to the downstream side of a fan motor to change the area of a flowline in an exhaust gas flowing direction. CONSTITUTION:Dust contained air sucked from a suction port 12 is passed through a filter 10 and dust therein is filtered. Thereafter, clean air is flowed through a fan part 9, an air passing port 7, an exhaust passage 15, an air passing port 18 and the interior of a motor part 8 to be exhausted to the outside from an exhaust port 13. On the other hand, dust filtered by the filter 10 is stored in a dust collecting case 11 and, when the dust collecting case 11 is detached at a proper time, it can be simply discarded. During a process flowing exhaust air through the exhaust passage 15, the exhaust air stream repeats contraction and expansion with the change of the passage area and noise generated at the fan part 9 is attenuated in the energy thereof during flowing.

Description

DETAILED DESCRIPTION OF THE INVENTION FIELD OF INDUSTRIAL APPLICATION The present invention relates to an exhaust system for an electrostatic precipitator that aims to reduce exhaust noise.

Conventional Structure and Problems Conventionally, the exhaust system for this type of electrostatic precipitator has provided a baffle plate in the middle of the exhaust path to create a meandering exhaust flow pattern, which is intended to attenuate noise energy. Unless a considerable number of baffle plates are provided, the noise reduction effect will be poor, and the configuration and assembly will be complicated.

Purpose of the Invention The present invention solves these conventional drawbacks.
The purpose is to reliably reduce noise with a simple configuration.

Structure of the Invention The present invention includes a cedar air chamber formed downstream of a fan motor, and a polygonal case disposed within this exhaust chamber.
Between the inside of these exhaust chambers and the outside of the case, one end communicates with the J Co. 1 air port, and the exhaust system of the electrostatic precipitator is equipped with an exhaust path whose flow path area changes in the direction of exhaust flow. Compression of flow.

The expansion and long exhaust path ensure reliable attenuation of noise energy.

Description of examples Examples thereof will be described below with reference to the accompanying drawings.

In FIGS. 1 and 2, the interior of the exhaust chamber 4.1 is accessed from above by partition walls 2, 3. It is a rectangular main body case divided into a fan chamber 5 and an east dust chamber 6. The motor part 8 of the fan motor 7 is installed in the exhaust chamber 4, and the fan section 9 is installed in the fan chamber 5 (in the exhaust chamber 4). Yes, there is a filter 10 for dust filtration in the Takada dust collection chamber 6.

This filter and a pull-out dust collection case 11 for collecting the dust filtered by the filter 10 are arranged. Reference numeral 12 indicates an intake port formed in the dust collection chamber 6, and reference numeral 13 indicates the top wall of the exhaust chamber 40. An exhaust port 14 formed in the center is a case provided in the exhaust chamber 4 so as to surround the exhaust port 13, and its upper and lower ends are hermetically joined to the top wall of the exhaust chamber 4 and the partition wall 2.

The case 14 has a rectangular shape similar to the main case 1, and is placed 90 degrees offset from the main case 1, so that there is a flow path in the flow direction between the two. A generally annular exhaust path 15 having a different area is set. 1
Reference numeral 6 designates a partition wall that blocks this exhaust passage 15, and reference numerals 1' and 7.18 designate vent holes formed with the partition wall 16 as a boundary, one of which is formed in the partition wall 3 and the other in the case 14.

In the structure described in ``2'', when the dust-containing air sucked from the intake port 12 passes through the filter 10, the dust is filtered out. After that, the purified air, that is, the exhaust air is fan part 9-ventilation hole 17→exhaust path 17-ventilation port: '18-motor part 8
The inside and flow of the exhaust port 13 are...6 QJBr2.
, released. In addition, the dust filtered by the filter 1o is collected in the dust collection case 11, and an appropriate II ¥1
If this dust collection/case 11 is removed during the first period, it can be easily disposed of. □-' Now, in the process of exhaust gas flowing into the exhaust passage 17, it contracts and expands repeatedly as the area of the exhaust passageway changes. hand,
The noise generated by the fan, section 9, etc. is attenuated by energy/j<energy during its flow.

In addition, in the above example, does the main body goo? 1 and the case 14 have similar shapes of squares, but the case 1 and the book body case 1 may have circular shapes or other shapes, and the case 14 is not specified to be square either. Further, in consideration of noise generation in the motor part 8, the exhaust passage 17 may be formed on the downstream side thereof.

As described in detail, according to the present invention, exhaust passages with different passage areas can be formed by simply incorporating a polygonal case into the exhaust chamber, and the configuration and assembly can be significantly simplified. Since the exhaust path is set in a substantially annular shape, the passage is long compared to the size of the exhaust chamber, and this ensures reliable noise reduction.

[Brief explanation of drawings]

Fig. 1 is a perspective view with main parts cut away of an electrostatic precipitator showing an embodiment of the present invention, and Fig. 2 is a cross-sectional view.
Exhaust chamber, 13...exhaust port, 14...case, 15...exhaust path. ((Name of J person: Patent attorney Toshio Nakao and 1 other person Figure 1)

Claims (1)

[Claims] It is equipped with an exhaust chamber formed on the downstream side of the fan motor and a polygonal case disposed within the exhaust chamber, with one end communicating with the exhaust port between the inside of the exhaust chamber and the outside of the case. An exhaust system for an electrostatic precipitator that has an exhaust path with a flow path area that changes in the direction of exhaust flow.