JPS5925624B2 - electric dust collector - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an electrostatic precipitator that collects dust by charging it and electrically adsorbing it, and its purpose is to prevent dust from adhering to discharge wires and to facilitate maintenance of equipment. The goal is to make things better.

As shown in FIG. 1, the configuration of the electrode section of a conventional electric precipitator includes dust collecting electrodes 11 arranged parallel to the air flow,
A counter electrode 12 arranged between the dust collecting electrodes 11 and at an opposite potential to this dust collecting electrode 11, and a discharge line 13 having the same polarity as this counter electrode 12 and provided in front of the opposite electrode 12. The dust in the contaminated air flowing in from the intake port 14 is charged by the discharge wire 13, and this charged dust is transferred to the dust collecting electrode 1.
During the process of passing between the dust collector electrode 11 and the counter electrode 12, the dust is attracted to the dust collection electrode 11, and dust collection is performed.

Therefore, the discharge wire 13 is constantly exposed to contaminated air, causing a problem of dust adhering to the discharge wire 13 and deterioration of performance.

In other words, when cigarette smoke or oil mist such as lard or salad oil is inhaled, oil or tar adheres to the discharge wire, which reduces the discharge of the discharge wire and reduces the ability to charge dust. A major problem arises in that the dust efficiency is drastically reduced.

In conventional dust collectors, as a countermeasure to this problem, it is necessary to clean the discharge wires and remove adhering dust at regular intervals, but this work also cuts the discharge wires or loses their tension. This makes it difficult for ordinary household users to carry out this procedure.

In addition, in order to solve this problem, the inventors have already proposed that the discharge wire 21 should not be brought into direct contact with dust-containing air, as shown in FIG.
We proposed a method in which a shower of ions is created outside the dust-containing air stream and blown into the dust-containing air to charge the dust particles, but even with this method, the dust-containing air is drawn into the ion generating section. This does not mean that the above problems do not exist.

The present invention has been made in view of the above points, and embodiments thereof will be described below based on the accompanying drawings.

In FIG. 3, reference numeral 1 denotes a casing of an electrostatic precipitator, which has an intake port 2 for sucking in dust-containing air and an exhaust port 3 for discharging purified air.

Reference numeral 4 denotes a ventilation path formed between the intake port 2 and the exhaust port 3, and air is circulated through the ventilation path 4 by a fan 5.

Reference numeral 6 denotes an ion generating section formed in communication with the ventilation path 4, and a shielding net 7 made of an insulating material that does not affect the electric field, such as plastic or string, is stretched over the population 6a, and the ventilation path 4 is connected to the ventilation path 4.
and hydrodynamically isolated.

Reference numeral 8 denotes a discharge line disposed within the ion generating section 6, to which a positive voltage is applied.

Reference numeral 9 is an opposing type provided with respect to the discharge wire 8 in a direction substantially perpendicular to the air flow flowing in front of the ion generating section 6 and on the opposite side of the ventilation path 40, and is grounded with respect to the discharge wire 8. There is.

10 is a dielectric filter provided at the rear of the ventilation path 4 where it is not affected by the discharge caused by the discharge wire 8;
Same as (dust that is grounded and charged by the discharge wire 8,
The clean air captured by the dielectric filter 10 passes through the fan 5 and is discharged from the exhaust port 3.

Ion generation in the ion generating section 6 and the charging state of dust will be explained as follows.

That is, when the discharge line 8 and the counter electrode 9 are made to face each other, the fourth
An electric field distribution as shown in the figure is formed.

Therefore, a divergent electric field is formed from the discharge line 8 toward the opposite side of the counter electrode 90, and ions generated in the vicinity of the discharge line 8 move along this electric field, and ions are irradiated into the air passage 4 like a shower. I will do it.

Therefore, the dust in the contaminated air flowing through the ventilation path 4 is charged by the ion shower.

The ion generating section 6 is connected to a ventilation path 4 through which dust-containing air flows.
Since the dust-containing air flowing through the ventilation path 4 does not go around to the ion generating section 6 due to the resistance of the shielding net 7, the discharge wire 8 And the adhesion of dust to the counter electrode 9 is greatly reduced.

As described above, according to the present invention, the discharge line that charges dust is located outside the ventilation passage, and the dust is charged by irradiating ions from there into the ventilation passage, and the ion generating part is not included in the shielding net. Since it is fluidly sealed from the dust air ventilation path, the discharge wire can escape from dust adhesion due to the circulation of dust-containing air, and the reduction in discharge capacity due to the adhesion of cigarette tar and oil. In addition to not causing a decrease in dust collection efficiency, since the shielding net is almost mechanically shielded, there is no possibility that the discharge wire will be damaged or strained by being used as a discharge wire from the outside. This greatly improves safety.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the configuration of a conventional example, Fig. 2 is an explanatory diagram of the configuration of a one-type ion shower that has already been developed, Fig. 3 is an explanatory diagram of the configuration of an electrostatic precipitator according to an embodiment of the present invention, and Fig. 4 is an explanatory diagram of the configuration of an electrostatic precipitator according to an embodiment of the present invention. It is an explanatory view showing electric field distribution between an electric wire and a counter electrode. 2...Intake port, 3...Exhaust port, 4...
...Vent passage, 6...Ion generation part, 6a.
... Entrance, 7 ... Shielding net, 8 ...
・Discharge wire, 9...Counter electrode.

Claims (1)

[Claims] 1. An air passage connecting the intake port and the exhaust port, an ion generating section located outside the air passage and surrounded by a recess facing the air passage, and an ion generating section located behind the ion generating section within the air passage. The ion generating section has a dust collecting section that adsorbs charged dust, and the ion generating section has a discharge wire and a counter electrode positioned facing each other to irradiate the air passage with ions. An electrostatic precipitator characterized in that a shielding net made of a material that has little effect on discharge is installed at the entrance of the section to prevent contaminated air flowing through the ventilation path from flowing into the ion generating section.