JPH0323312Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an electrostatic precipitator that charges dust and collects the charged dust by adsorbing it.

[Conventional technology]

In recent years, electrostatic precipitators that remove floating dust, airborne microorganisms, cigarette smoke, etc. contained in indoor air, sterilize and deodorize it, and keep indoor air clean have become popular. For example, JP-A-55-
The one disclosed in Publication No. 22390 is known.

FIG. 4 shows the configuration of a conventional electrostatic precipitator, with the charging section 10 and the dust collecting section 20 shown in cross section.

In FIG. 4, reference numeral 12 denotes a casing made of an insulator, in which an air inlet 13 and an air outlet 14 are formed.
A fan 16 driven by the fan 5 is housed therein. Note that 17 indicates an air flow sucked in from the suction port 13.

The charging section 10 is configured as shown in FIG. That is, a plurality of charged electrode plates 2 are arranged at predetermined intervals in parallel to the air flow 17 shown in FIG.
As shown in FIG. 7a, the discharge wires 1 are arranged at opposite potentials to the charged electrode plates 2 and at the central position between the charged electrode plates 2, facing each other at a predetermined distance from the charged electrode plates 2. The electric wire 1 has one end connected to the discharge wire connection plate 5.
a, the other end is attached to a discharge wire connection plate 5b via a spring 4 for maintaining the tension of the discharge wire 1, and this charging section 10 further includes a sixth
As shown in the figure, the discharge wire connecting plate 5 is inserted into the grooves of the fitting parts 12a and 12b protruding from the inner wall surface of the casing 12.
a, 5b are engaged and held, respectively, and connecting portions 3a, 3b at both ends of the charged electrode plate 2 are fixed and attached to the inner wall surface of the casing 12 with screws 18.

Further, the dust collecting section 20 is disposed at the same polarity as the charged electrode plate 2 and at the rear of the charged electrode plate 2 and the discharge wire 1, as shown in FIG. 4, at right angles to the charged electrode plate 2.

Next, the operation will be explained.

Dirty airflow 17 containing floating dust, floating microorganisms, cigarette smoke, etc. is passed through the suction port 13 of the casing 12 to the charging section 10 composed of the charged electrode plate 2 and the discharge wire 1.
flow into. A high voltage is applied between the charged electrode plate 2 and the discharge wire 1, and the discharge wire 1 is discharged by this high voltage, and the dust in the air contaminated by this discharge is at the same potential as the discharge wire 1. charged to. In the process of passing through the dust collection section 20, this charged dust is adsorbed by the dust collection section 20, which is set at a potential opposite to that of the discharge wire 1, and the dirty air becomes clean air and is supplied into the room through the air outlet 14.

[Problem that the invention attempts to solve]

In the charging section of the conventional electrostatic precipitator configured as described above, the relationship between the discharge wire 1 and the charged electrode plate 2 is such that the charged electrode plate 2 is arranged so that discharge is uniformly performed as shown in FIG. The distance between the discharge wire 1 and the charged electrode plate 2 is L/2 with respect to the distance L between them, that is, the discharge wire 1 is placed at the center position between the charged electrode plates 2, and the connecting plate 3 connects the charged electrode plates 2. The distance l' between the discharge wire 1 and the charged electrode plate 2 was set to a value larger than the distance L/2 between the discharge wire 1 and the charged electrode plate 2 relative to the width l of the charged electrode plate 2.

However, as the electrostatic precipitator becomes thinner, the width _l1 of the charged electrode plate 2 is reduced, as shown in FIG. 7b, and the distance l' ₁ between the discharge wire 1 and the connecting plate 3 is reduced. Due to the distance L/2 from the electrode plate 2, it became impossible to secure a large value. Due to the proximity of the discharge wire 1 and the connecting plate 3, a discharge occurs between the discharge wire 1 and the connecting portions 3a and 3b, and spark discharge is also generated.
There were problems such as a significant decrease in the discharge between the electrode plate 2 and the charged electrode plate 2. Further, the discharge wire 1 in the charging section 10,
The charged electrode plate 2 and the discharge wire connection plates 5a and 5b are assembled one after another, but this is a very labor-intensive task because there are a large number of parts.

This idea was made to solve the problems mentioned above, and it was designed to have sufficient cleaning performance without compromising the thinness of the electrostatic precipitator, as well as to improve assembly workability. The purpose is to provide an electrostatic precipitator that can.

[Means for solving problems]

In the electrostatic precipitator according to this invention, the charging part is attached to the casing by providing a fitting part on the casing for covering and fixing the connecting parts formed at right angles to the charging electrode plate at both ends of the charging electrode plate. This is what I did.

[Effect]

In this invention, by attaching the connecting parts at both ends of the charged electrode plate to the fitting parts formed in the casing, the entire surface of the connecting part facing the discharge wire is covered, thereby creating a gap between the connecting part and the discharge wire. Discharge is prevented.

〔Example〕

FIG. 1 is a perspective view of the charging section 11 of the electrostatic precipitator according to this invention, and FIG. 2 is a perspective view of the charging section 1 of FIG.
1 is attached to a casing 12. In these figures, the same reference numerals as in FIGS. 4 and 5 indicate the same components, and 12a, 12
b is a fitting part made of an insulator for covering and fixing the connecting parts 3a and 3b, respectively; for example, one part is formed with a rib groove and the other part is formed into a concave shape, and is integrally attached to the casing 12 made of an insulator. It is formed. Connecting portions 3a, 3b at both ends of the charging electrode plate 2 of the charging section 11 are connected to these fitting portions 12a, 12b.
are fitted, and the fitting portion 12b formed in a concave shape is fixed by a fixing means, for example, a rivet 19 made of an insulator. Further, discharge wire connection plates 5a and 5b, to which both ends of a plurality of discharge wires 1 are connected, are connected to an engagement holding portion 1 that protrudes from the inner wall surface of the casing 12.
At 2c and 12d, the discharge wire 1 is attached facing the charged electrode plate 2 while maintaining tension. As a result, the charging section 11 is installed inside the casing 12.

Next, the operation will be explained.

Connecting parts 3a arranged at both ends of the charged electrode plate 2,
Fitting part 1 where one side of 3b is formed in casing 12
2a, and the other side is inserted into the concave fitting part 12b.
By fitting and fixing with rivets 19,
The entire surfaces of the connecting parts 3a and 3b are covered with the fitting parts 12a and 12b of the casing 12, and are fixedly positioned. As a result, only the charged electrode plate 2 facing the discharge wire 1 is exposed.

Therefore, as the width of the charged electrode plate 2 decreases as the electrostatic precipitator becomes thinner, the discharge wire 1 and the connecting portions 3a and 3b become closer to each other, and the discharge wire 1 and the connecting portion 3 become closer together.
The discharge (spark discharge) between the discharge wire 1 and the connecting parts 3a and 3b caused by the approach of the casing 1
The fitting parts 12a and 12b formed in the connecting part 3
This is prevented by covering the charged electrode plates 2 and 3b.
Since only the discharge occurs between the electric precipitator and the discharge wire 1, the cleaning performance of the electrostatic precipitator can be fully exhibited.

In the above embodiment, a groove-shaped fitting part 12a and a concave fitting part 12b were formed, but as shown in FIG. Similar effects can be obtained by forming the charging section 11 and attaching the charging section 11 thereto. Moreover, both fitting parts can also be fitted and fixed into grooves made of ribs.

[Effect of idea]

As explained above, in this invention, a fitting part made of an insulator is formed in a casing made of an insulator to cover the connecting parts formed at both ends of the charged electrode plate of the charging part, and a load is applied to this fitting part. Since the electrostatic precipitator is constructed by fitting the connecting parts at both ends of the electrode plate and attaching the charging part, the simple structure can prevent discharge at inappropriate locations and improve the cleaning performance of the electrostatic precipitator. It is possible to achieve the effect of being able to take full advantage of the

[Brief explanation of drawings]

Fig. 1 is a perspective view of the charging section of the electrostatic precipitator according to this invention, Fig. 2 is a top sectional view showing the mounting state of the charging section of this invention, and Fig. 3 is a charging section showing another embodiment of this invention. Figure 4 is a cross-sectional view of a conventional electrostatic precipitator, Figure 5 is a perspective view of a conventional charging unit, and Figure 6 is a top view showing how a conventional charging unit is installed. The sectional views and FIGS. 7a and 7b are explanatory diagrams showing the positional relationship of the discharge wire with respect to the charged electrode plate. In the figure, 1 is a discharge wire, 2 is a charged electrode plate, and 3
a and 3b are connection parts, 5a and 5b are discharge wire connection plates,
11 is a charging part, 12 is a casing, 12a, 12
b is a fitting part, and 12c and 12d are engagement holding parts. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of utility model registration request] A charging section that charges dust in the passage and a dust collection section that adsorbs the charged dust are provided in a ventilation path of a casing made of an insulator in which an air intake port and an air outlet are formed, and the charging section is connected to a plurality of In an electrostatic precipitator configured by arranging electrode plates at predetermined intervals and disposing a discharge wire in the center between each of the charged electrode plates facing the charged electrode plates, the electrode plate faces the discharge wire of the charging section. An electrostatic precipitator characterized in that the casing is provided with a fitting part made of an insulator that is fitted and fixed so as to cover the connecting parts formed at both ends of the charged electrode plate.