JP2623999B2 - Electric dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric precipitator capable of collecting oil mist.

[0002]

2. Description of the Related Art Conventionally, a dust-containing gas mixed with dust and tobacco smoke is introduced into a casing through a suction port, and dust particles contained in the introduced dust-containing gas are ionized by a dust collecting element. There is provided an electric precipitator of a type in which a dust is collected by a dust collecting part after being charged by the part.

[0003] This type of electric precipitator is used, for example, in a barbecue shop,
When installed in a restaurant such as an eel shop, a Chinese restaurant, or a factory where oil mist is generated a lot, oil collected in the dust collecting part of the dust collecting element will be downstream of the dust collecting part by wind pressure. There is a problem in that the oil droplets gather at the end and become oil droplets, and when the oil droplets grow to some extent, they are scattered from the dust collecting portion and mixed with the clean gas and released into the room.

Therefore, an after-filter made of a fiber layer of synthetic fiber or cotton is arranged downstream of the dust collecting portion of the dust collecting element, and the after filter collects oil droplets scattered from the dust collecting portion. Such a configuration is provided (for example, see Japanese Utility Model Application Laid-Open No. 64-56847).

[0005]

In an electric precipitator provided with the above-mentioned after-filter, a very high-density after-filter is used in order to efficiently collect oil droplets scattered from a dust collecting portion. . For this reason, there was a problem that the blowing resistance was large and the dust collection efficiency was reduced accordingly.
In addition, in order to reliably collect the scattered oil droplets, the after-filter needs to be arranged at a certain distance from the dust collecting portion, and an extra space is required by that amount, which increases the size of the device. There was a problem.

[0006] The present invention has been made in view of the above problems, and has as its object to provide an electric precipitator having a small resistance to blowing air and capable of reducing the size of the apparatus.

[0007]

According to the present invention, there is provided an electric precipitator for achieving the above object. The electric precipitator includes a dust-containing gas sucked into a casing having a dust-containing gas inlet and a clean gas outlet. In an electric precipitator provided with a dust collecting element comprising an ionizing portion for charging dust particles contained in a gas and a dust collecting portion for collecting dust particles charged by the ionizing portion, a downstream portion of the dust collecting portion A net-like body is provided along the end on the downstream side to allow oil droplets attached to the downstream end to flow down and be collected.

[0008]

According to the electric dust collecting apparatus having the above-described structure, the oil droplets attached to the downstream end of the dust collecting portion can be collected by flowing down along the mesh provided at the downstream end. Therefore,
It is possible to prevent oil droplets attached to the downstream end of the dust collecting portion from growing and scattering. As described above, the mesh body collects the oil droplets attached to the dust collecting portion by flowing down the oil droplets.
Since it does not collect the oil droplets once scattered from the dust collecting part, it is not necessary to increase the density as in the conventional after-filter, and the ventilation resistance can be extremely reduced, and the installation space is very small. I'm done.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a schematic sectional view showing the internal structure of the electric precipitator of the present invention. This electrostatic precipitator is of a ceiling-hanging type, in which a suction port 11 for introducing dust-containing gas is formed at one end of a casing 1, and a purified gas inlet is formed at the other end of the casing 1. An outlet 12 is formed. Further, inside the casing 1, a dust collecting element 2 and a blower fan 3 are arranged in this order along the gas flow direction.

The dust collecting element 2 is removably mounted inside the element housing frame 21. An ionizing section 22 for charging dust particles in the dust-containing gas is provided on the upstream side, and the ionizing section 22 is provided on the downstream side. A dust collection unit 23 that collects dust particles charged by the unit 22 is provided. A dust collecting part 23 is provided at the bottom of the element storage frame 21.
An oil pan 24 for storing oil dropped from the oil pan is provided so as to be drawn out. The above dust collecting element 2
Can be pulled out together with the element storage frame 21 through an opening 13 formed in the bottom of the casing 1. The opening 13 is normally closed by a lid 14.

In the electric dust collecting apparatus having the above-mentioned structure, the dust collecting portion 2 is provided at the downstream end of the dust collecting portion 23 of the dust collecting element 2.
In order to collect oil droplets adhering to the downstream end of No. 3, a net 25 is provided. The net-like body 25 is provided in contact with or close to the end of the ground electrode 23a constituting the dust collecting part 23, and transmits the oil droplets attached to the end of the dust collecting part 23, and It is caused to flow down to the pan 24. The mesh 25 is made of a relatively coarse mesh of about 30 to 40 mesh.

As described above, according to the above-mentioned electric dust collector,
The oil droplets attached to the downstream end of the dust collecting portion 23 can flow down along the mesh member 25 provided at the downstream end and can be collected, so that the oil droplets attached to the downstream end of the dust collecting portion 23 grow. Can be prevented from scattering. Moreover, since the mesh 25 can be made of a relatively coarse mesh,
The ventilation resistance can be extremely reduced. Further, since the mesh member 25 is close to or in contact with the dust collecting portion 23, the installation space is hardly required, the device can be reduced in size, and the scattering of oil droplets can be prevented with a very simple structure. Can be.

FIG. 2 is a schematic sectional view showing another embodiment. This embodiment is different from the above embodiment in that
The downstream end of the is inclined so that the lower side protrudes,
The point is that the mesh body 25 is brought close to or in contact with the inclined downstream end. According to this embodiment, since the downstream end of each ground electrode 23a gradually shifts along the air blowing direction, even if an oil droplet drops from the downstream end of the upper electrode 23a, the downstream end of the lower ground electrode 23a is Since dropping can be prevented, it is possible to prevent oil droplets attached to the lower-stage ground electrode 23a from growing at a stretch and scattering.

The net 25 can be made of a synthetic resin net in addition to the above-mentioned wire net, but in any case, it is preferable to use a net made of non-combustible material.

[0015]

As described above, in the electric dust collecting apparatus of the present invention, the oil droplets adhering to the downstream end of the dust collecting portion of the dust collecting element are formed by the mesh body along the downstream end of the dust collecting portion. Since oil droplets are collected and prevented from being scattered, the ventilation resistance is very small and the dust collection efficiency can be improved as compared with a conventional one using an after-filter.
In addition, since scattering of oil droplets can be prevented with little space, the size of the apparatus can be reduced.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing one embodiment of an electric precipitator of the present invention.

FIG. 2 is a schematic sectional view showing another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Casing 2 Dust collection element 22 Ionization part 23 Dust collection part 25 Net-like body

Claims (1)

(57) [Claims] 1. An ionization section for charging dust particles contained in a sucked dust-containing gas in a casing having a dust-containing gas suction port and a clean gas discharge port, and charged by the ionization section. In an electric precipitator provided with a dust collecting element comprising a dust collecting portion for collecting dust particles, an oil droplet attached to the downstream end of the dust collecting portion flows down along a downstream end of the dust collecting portion. An electrostatic precipitator, comprising a mesh body for collecting and collecting.