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Electric dust collector

A kind of equipment and electric technology, which is applied in the direction of mining equipment, dust prevention, electrode structure, etc., can solve the problem of large particle size dust particles reducing the dust collection rate, etc.

Inactive Publication Date: 2010-08-18
FUJI ELECTRIC CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conversely, when the frequency is lowered, there is a problem of redispersion and lower dust collection efficiency for large-sized dust particles

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0044] Fig. 1 is a cross-sectional structure of an electric dust collector according to a first embodiment of the present invention.

[0045] This electric vacuum cleaner includes a charging unit 40 and a dust collection unit 50 . The charging part 40 has a straight-to-plate electrode structure, including a pair of ground electrodes 21 and 22 and a straight high-voltage electrode 23 . The high voltage power supply 20 applies a DC high voltage between the ground electrodes 21 and 22 and the high voltage 23 to generate corona discharge in the charging unit 40 . The polarity of DC high voltage is either positive or negative, and the voltage can be pulse voltage.

[0046] The suction part 50 has a parallel plate electrode structure, including ground electrodes 31 and 32 as a pair of plates and a high voltage electrode 33 as a plate. The AC high voltage power supply 60 applies AC high voltage (with a frequency of 0.1-2 Hz) between the ground electrodes 31 and 32 and the high volt...

no. 2 example

[0060] It can be speculated that in the rectangular voltage waveform, the greater the voltage change rate dv / dt corresponding to the voltage gradient in section B in Figure 3, the more it can limit redispersion and maintain a higher dust collection rate. But the problem is that the higher the voltage change rate dv / dt, the more the induced current value increases, so it is required to increase the current resistance of a certain part inside the high-voltage power supply equipment, and for the same reason, it is also proposed to increase the cable size. thick question. This becomes an important practical issue when selecting the optimum dv / dt value for the rate of voltage change.

[0061] In this regard, an electric vacuum cleaner according to a second embodiment of the present invention will be described below, which achieves a high vacuum rate and has a necessary minimum voltage change rate dv / dt value when using a rectangular waveform AC high voltage, It also simplifies pow...

no. 3 example

[0101] Fig. 16 shows an electric vacuum cleaner according to a third embodiment of the present invention.

[0102] The electrode structures of the charging part 40 and the dust collecting part 50 are similar to those in FIG. 1 , so they will not be described in detail.

[0103] In the case of FIG. 16, the voltage applied to the charging section 40 consists of AC high voltage (ie, sinusoidal or rectangular AC high voltage).

[0104] AC high voltage is applied between the linear motor 23 and the plate electrodes 21 and 22 of the charging part 40 . As the AC high voltage, not only a sinusoidal AC high voltage but also a rectangular AC high voltage can be used. Therefore, according to this example, the output waveform of the AC high-voltage power supply 80 can be arbitrarily selected. Similarly, for the output waveform of the AC high voltage power supply 90 of the dust collection part 50, not only a sinusoidal AC high voltage but also a rectangular AC high voltage can be selecte...

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PUM

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Abstract

The electric dust collector in accordance of the present invention comprises an electrifying part and a dust collecting part, wherein the electrifying part is of corona discharge type and is provided to charge the air dust, the dust collecting part is provided to absorb charged dust in air. A rectangular wave alternating current high-voltage with 0.1-2 Hz is applied between a pair of grounding electrodes and high voltage electrodes to generate an electrostatic field therein. As a result, a suspended particle-containing gas stream passing through the part is charged and the suspended particlesare collected on the electrodes by the electrostatic field in the part.

Description

[0001] This application is a divisional application of an invention patent application with an application date of August 4, 2003, an application number of 03153005.2, and an invention title of "Electric Vacuum Cleaning Equipment". technical field [0002] The invention relates to a high-voltage generating part for cleaning the air in a tunnel by applying a rectangular waveform AC high voltage. Background technique [0003] As we all know, the harmful gas and soot in the exhaust of automobiles and the sub-micron floating dust caused by the wear and tear of tires or road asphalt when the car is running will pollute the air in the car lane in the tunnel. Therefore, in order to eliminate the smoke and dust in the polluted air, we To use an air cleaning device, the device employs a two-stage type electric vacuuming device including a charging part and a dusting part. [0004] Fig. 20 shows the structure of a common two-stage electric vacuum cleaner. The electric vacuum cleaner ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B03C3/04B03C3/66B03C3/68B03C3/40E21F5/00B03C3/41B03C3/47
CPCY02A50/2351
Inventor 瑞庆覧章朝安本浩二河野良宏伊藤泰郎
Owner FUJI ELECTRIC CO LTD
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