JPH04310251A - Air purifier - Google Patents

Abstract

PURPOSE:To provide an air purifier ensuring the length of an electrode part as long as possible and capable of enhancing dust collecting capacity. CONSTITUTION:A columnar boss 6 is provided between two discharge electrode plates 3 and a coil part is provided to the columnar boss 6. A coil spring 7 is provided to the columnar boss 6 so that both arm parts extending from both end parts of the columnar boss 6 are fitted in the notch parts provided to the end parts of two discharge electrode plates 3 to apply tension to the discharge electrode plates 3. The columnar boss 6 is also used as the boss fixing the press fitting (B)8 fixing the discharge electrode plates 3, where (B) is an insulation frame.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates primarily to an air purifier for removing and purifying indoor air by removing foreign matter.

0002

BACKGROUND OF THE INVENTION In recent years, air purifiers have come into widespread use as buildings become more airtight and awareness of health and hygiene increases.

Conventionally, this type of air cleaner has generally had a configuration as shown in FIGS. 4 and 5. The configuration will be described below with reference to the drawings.

As shown in the figure, cigarette smoke, dust, etc. in the air sucked into the main body from an intake grill 101 are ionized in a charging device 102, and then transferred to a blower device 105 consisting of blades 103, a motor 104, etc. The clean air is collected by a dust collection device 106, such as a filter, disposed on the suction side of the room, and the clean air is returned to the room through the air outlet 107 by the blower device 105. Then, the charging device 1
02 is integrally molded so that a plurality of electrode plates are lined up in parallel, and has a grounded counter electrode plate 108 made of a sheet metal, and a sawtooth-shaped counter electrode plate 108 disposed between each of the counter electrode plates 108. a plurality of discharge electrode plates 109 forming a large number of needle-like electrode parts;
Electrical insulation is provided between the counter electrode plate 108 and the discharge electrode plate 109, and these counter electrode plates 108 and discharge electrode plates 1
A resin insulating frame that holds and positions parts such as 09 (
It consists of A) 110-a, an insulating frame (B) 110-b, etc. Further, the discharge electrode plate 109 is fixed at one end by a presser fitting 111 which also serves as a conductive part for contacting the discharge electrode plate 109 and applying a high voltage, and at the other end, a L via the coil spring 112
It is locked in a tensioned state by a letter-shaped spring fixing fitting 113.

In the above configuration, corona discharge is generated between the discharge electrode plate 109 and the counter electrode plate 108 to which a high voltage is applied, and cigarette smoke, dust, etc. are charged.

[0006]

[Problems to be Solved by the Invention] In such conventional air cleaners, the space occupied in the longitudinal direction (pulling direction) of the tension coil spring 112 increases, and the longer the discharge electrode, the better the dust collection performance. There was a problem in that the length of the effective discharge portion of the plate 109 and the length of the counter electrode plate 108 could not be ensured to be large. Also, for the same reason as above,
Insulating frame 110-b constituting a mounting portion of discharge electrode plate 109
However, there was a problem in that it was not possible to ensure the length of the electrode portion that performed the corona discharge function as long as possible while trying to make the device more compact.

The present invention has been made to solve the above-mentioned problems, and its first object is to provide an air cleaner that can reduce the space for the mounting portion in the longitudinal direction of the discharge electrode plate.

The second purpose is to make the insulator itself more compact.

[0009]

[Means for Solving the Problems] In order to achieve the above-mentioned first object, the air cleaner of the present invention includes a charging device for charging dust in the air, a dust collecting device,
The charging device includes a plurality of discharge electrode plates, an opposing ground electrode plate, a coil portion fitted and fixed to a columnar boss, and a coil portion that is fitted and fixed to an end of the discharge electrode plate, respectively. The structure includes a torsion coil spring consisting of both arms extending from both ends of the coil portion that fit into the provided notch and apply tension.

[0010] A second means for achieving the second object is that the columnar boss is configured to double as a screw fitting boss for screwing the torsion coil spring and the fixing lid of the discharge electrode plate. It is something.

[0011]

[Operation] According to the first means described above, the present invention applies tension to the discharge electrode plate using a torsion coil spring, so that the size of the mounting portion of the discharge electrode plate in the longitudinal direction can be reduced. It is possible to ensure a large length of the effective discharge portion of the discharge electrode plate.

Furthermore, with the configuration of the second means, the number of bosses provided on the insulating frame can be reduced, so the insulating frame can be made more compact, and as with the first means, the number of bosses provided on the insulating frame can be reduced. This makes it possible to ensure a large length of the effective discharge portion.

[0013]

[Embodiment] The first embodiment of the present invention will be described below with reference to FIG.
This will be explained with reference to FIG.

As shown in the figure, the charging device 1 includes a plurality of electrode plates arranged in parallel, integrally molded, and a counter electrode plate 2 made of a grounded sheet metal, and each pole of the counter electrode plate 2. A plurality of discharge electrode plates 3 are arranged between the plates and form a large number of sawtooth needle-like electrode parts, and electrical insulation is provided between the counter electrode plate 2 and the discharge electrode plate 3. Counter electrode plate 2
It is composed of an insulating frame (A) 4-a and an insulating frame (B) 4-b made of resin for holding and positioning parts such as the discharge electrode plate 3 and the discharge electrode plate 3. , is fixed by a holding metal fitting (A) 5 which also serves as a conductive part for contacting the discharge electrode plate 3 and applying a high voltage.

[0015] Also, an insulating frame (B) holding the other end
4-b, there is a columnar boss 6 between two discharge electrode plates 3 arranged in parallel, a coil part is fitted into this columnar boss 6, and both arm parts extending from both ends of the coil part are 2, respectively. A torsion coil spring 7 is provided which fits into an L-shaped notch provided at the end of the discharge electrode plate 3 of the book and applies tension in the longitudinal direction of the discharge electrode plate 3.

With the above configuration, the tension coil spring, which was conventionally located on the longitudinal extension line of the discharge electrode plate 3, is replaced with a torsion coil spring 6, which is installed between the discharge electrode plates 3, so that the discharge electrode plate 3 The space for the mounting portion in the longitudinal direction can be reduced. Therefore, on the contrary, it is possible to ensure a large length of the effective discharge portion of the discharge electrode plate 3 in which the serrated needle electrode portion is formed, and it is possible to improve the dust collection performance. Furthermore, in the past, at least one tension coil spring was required for one discharge electrode plate, but in the present invention, it is possible to apply tension to two discharge electrode plates 3 with one torsion coil spring 6. This reduces the number of parts and reduces assembly man-hours.

As described above, according to the air cleaner of the first embodiment of the present invention, it is possible to reduce the space for the attachment part in the longitudinal direction of the discharge electrode, and therefore, the length of the discharge electrode can be increased to increase the concentration. It is possible to improve dust efficiency.

Next, a second embodiment of the present invention will be described with reference to FIG. Note that the same parts as those in the first embodiment are given the same numbers and detailed explanations will be omitted. As shown in the figure, the columnar boss 6 is formed on a hollow screw boss, and a presser metal fitting (B) 8 for fixing the discharge electrode plate 3 and the torsion coil spring 7 in contact with each other is screwed to the columnar boss 6. .

With the above configuration, the columnar boss 6 is attached to the presser metal fitting (
B) Since the fixing screw boss of 8 is also used, the insulating frame 4
The number of bosses provided on the insulating frame 4-b can be reduced, and the insulating frame 4-b can be made more compact. Therefore, as in the first embodiment, the insulating frame 4-b is made compact, and the length of the effective discharge portion of the discharge electrode plate 3 can be ensured to be large, so that the dust collection performance can be improved.

As described above, according to the air purifier of the second embodiment of the present invention, the insulating frame 4-b can be made more compact, and therefore the length of the discharge electrode plate 3 can be increased to improve the dust collection performance. You can make improvements.

[0021]

As is clear from the above embodiments, according to the present invention, the length of the discharge electrode can be reduced by reducing the space for the mounting part in the longitudinal direction of the discharge electrode and by making the insulating frame more compact. It is possible to provide an air purifier that is effective in increasing dust collection performance by increasing the length of air.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing the state of support of a discharge electrode plate of an air cleaner according to a first embodiment of the present invention.

[Figure 2] Cross-sectional view showing the support state of the discharge electrode plate

[Figure 3]
The present invention is a perspective view showing a supporting state of a discharge electrode plate of an air cleaner in a second embodiment.

[Figure 4] Cross-sectional view showing the configuration of a conventional air purifier

[Figure 5]
A cross-sectional view showing how the discharge electrode plate is supported.

[Explanation of symbols]

1 Charging device 2 Counter electrode plate 3 Discharge electrode plate 4-a Insulation frame (A) 4-b Insulation frame (B) 6 Columnar boss 7 Torsion coil spring 8 Presser metal fitting (B)

Claims (2)

[Claims] 1. A charging device includes a charging device and a dust collector for applying a load to dust in the air, and a blowing device consisting of a motor, blades, etc., and the charging device includes a plurality of discharge electrode plates, an opposing ground electrode plate, and a torsion coil spring consisting of a coil part fitted and fixed to the columnar boss, and both arms extending from both ends of the coil part, each of which fits into a notch provided at the end of the discharge electrode plate and applies tension. Equipped with an air purifier. 2. The air cleaner according to claim 1, wherein the columnar boss also serves as a screw fitting boss for screwing the torsion coil spring and the fixing lid of the discharge electrode plate.