JPH04225815A - Ozone removing filter - Google Patents

Abstract

PURPOSE:To prolong the life of a filter, to make the filter in expensive by reduction of the thickness and to make the exchange facile and quick by providing a projection member projected to an upper stream side of a fluid from the central part of a sheet form filtering member, containing an ozone decomposition agent at the outer surface part and removing a portion of ozone in the fluid. CONSTITUTION:The ozone removing filter 20 is provided with a sheet form filtering member 21 which is installed nearly orthogonally crossing air flow 13 and a conical form projection member 22 attached at the central part 21a and projected to the upper stream side of the air flow 13. The filtering member 21 incorporates the ozone decomposition agent 23 and the projection member 22 is coated or printed with the ozone decomposition agent on the outer surface part 22a. The filtering member 21 is supported with a supporting member 25 and is attachable and detachable together with the projection member 22 when it is used to the life limit. While the air 13 containing ozone sucked from an ozone generation source 14 with a fun 15 is brought into contact with the outer surface part 22a of the projection part 22 or is sucked directly into the filtering member 21, and is exhausted to the outside.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention is an ozone removal filter, for example, which removes ozone generated from a discharge device in an electrophotographic image forming apparatus such as a copying machine, a laser printer, or a facsimile machine. related to ozone removal filters.

0002

2. Description of the Related Art Generally, an image forming apparatus such as a copying machine has a built-in corona discharger such as a charging charger, a transfer charger, a separation charger, and a static elimination charger for charging a photoreceptor. Ozone generated when a corona discharger discharges can cause discomfort to the human body if it exceeds a certain concentration, so an ozone removal means using an ozone removal filter is usually provided at the outlet of the cooling air that cools the internal heat generation. After removing as much ozone as possible from the cooling air flowing outside, it is released outside.

Examples of ozone removal means using conventional ozone removal filters are shown in FIGS. 4 to 6. In the ozone removal means 1 shown in FIG. 4, a propeller fan 2 having four blades 2a is arranged near the outer cover of the image forming apparatus, and is fixed to the outer cover (not shown). Filter 3 is attached. As the propeller fan 2 rotates, the ozone-containing air 5 inside the device is sucked in the direction of the arrow by the suction force of the propeller fan 2, passes through the ozone removal filter 3 together with the hot air inside the device, and the ozone is removed by the ozone removal filter 3. Most of it is removed and released to the outside.

0004

[Problems to be Solved by the Invention] However, in such a conventional propeller fan 2, the four blades 2a are supported by a central circular support portion 2b. As shown in FIG.
is emitted to the outside through the peripheral portion 3a of the. Therefore, almost no air 5 passes through the central part 3b of the ozone removal filter 3 corresponding to the peripheral part 2b of the propeller fan 2 and is wasted, resulting in a problem that the ozone removal effect per total area of the propeller fan 2 becomes small. There is.

[0005] To eliminate this waste, Japanese Patent Application Laid-open No. 1983
There is a device as shown in FIG. 6 described in Japanese Patent No. 195668. Since the support part 2b of the propeller fan 2 originally has no suction force, the ozone removal filter 6 has a central part 6 facing the support part 2b.
Based on the idea that an ozone removal filter member is not necessary for the ozone removal filter 6, a grip portion 7 is provided in the center portion 6a of the ozone removal filter 6 in place of the ozone removal filter.

The present invention has been made against the background of such prior art, and includes providing a protruding member that protrudes from the center of a plate-shaped filter member of an ozone removal filter toward the upstream side of the fluid. To provide an ozone removal filter that can extend the life of the ozone removal filter or reduce its thickness by containing an ozone decomposing agent in the outer surface of the ozone removal filter and removing part of the ozone in the fluid with a protruding member. purpose.

[0007]

[Structure of the Invention] The present invention has been made in view of the problems of the prior art, and includes a fan installed almost perpendicularly to the flow of ozone-containing fluid discharged from the ozone source side to the outside by a fan. a plate-shaped filter member containing an ozone decomposer, and a protruding member attached to the center of the filter member and protruding from the center toward the upstream side of the fluid flow, and having the ozone decomposer on at least an outer surface portion; It is characterized by having the following.

Furthermore, in the ozone removal filter according to claim 1, the filter member is removably supported by a support member, and is removable together with the protruding member when the filter member reaches the end of its life.

[0009]

[Operation] According to claim 1 of the present invention, the fluid containing ozone is sucked by the blades around the fan, flows toward the plate-shaped filter member, and reaches the outer surface of the protruding member on the upstream side of the center of the filter member. Part of the ozone is decomposed by contacting the outer surface of the filter, the ozone concentration in the fluid is reduced, and the reduced ozone concentration fluid passes through the periphery of the filter member. This reduces the use of ozone decomposers in the filter member, greatly extending its usable period and extending the life of the ozone removal filter.

In claim 2, when replacing the ozone removal filter of claim 1, the plate-shaped filter member is separated from the support member by grasping the protruding member, and the ozone removal filter is removed integrally. Also, a new ozone removal filter can be attached, and the ozone removal filter can be replaced by holding the support member.

[0011]

Embodiments Next, embodiments of the present invention will be specifically explained based on the drawings. 1 and 2 show a case where a first embodiment of an ozone removal filter according to claims 1 and 2 of the present invention is applied to an ozone removal device for a copying machine. First, the configuration will be explained. In FIG. 1, reference numeral 11 denotes an ozone removal device, and the ozone removal device 11 is attached to an opening in a side plate 12 of a copying machine (not shown). The ozone removal device 11 includes a propeller fan 15 that sucks air 13, which is a fluid containing hot air and ozone, from an ozone generation source 14 such as a charging charger or a transfer charger (not shown) inside the copying machine.
have. The propeller fan 15 is housed in a square case 16,
The inside of the case 16 communicates with the outside through a square duct 17 and an opening in the side plate 12 . The propeller fan 15 has a cylindrical central portion 15a that accommodates the motor 18, and four blades 15b extending radially from the central portion 15a. The motor 18 is connected via a power switch, which is turned on at the same time as the copier is powered on. Motor 1
8 rotates the blades 15b of the propeller fan 15, and the air 13 inside the copying machine is discharged to the outside through the duct 17.

An ozone removal filter 20 is disposed on the upstream side of the propeller fan 15 through which the air 13 flows. The ozone removal filter 20 is formed into an annular plate shape and
a plate-shaped filter member 21 provided substantially perpendicular to the flow of air 13; and a conical protruding member 22 attached to the center portion 21a of the filter member 21 and protruding from the center portion 21a toward the upstream side of the flow of air 13. It is equipped with. Filter member 21 contains a conventional ozonolytic agent 23, such as a terpene compound. Further, the protruding member 22 is
The above-mentioned ozone decomposing agent 23 is applied or printed on the outer surface portion 22a of 2.

Filter member 2 of ozone removal filter 20
1 is attached to a case 16 of a propeller fan 15 and is detachably supported by four brackets 25 which are supporting members. The ozone removal filter 20 can be detached from the case 16 of the propeller fan 15 integrally with the filter member 21 by holding the protruding member 22 and unattaching the lower support member 25a of the case 16. 20 can be attached to the case 16 by performing the reverse operation. When the ozone removal filter 20 is attached to the case 16, the peripheral part of the filter member 21 is in close contact with the case 16, and the air 13 is transferred to the outer surface 22 of the protruding member 22.
The filter member 21 is made to pass through the filter member 21 after contacting the filter member 21 or directly.

Next, the operation will be explained. When the copying machine is turned on, the ozone generation source 14 inside the copying machine operates and begins to generate ozone, and the ozone removal device 1
The power of the motor 18 of No. 1 is turned on, and the propeller fan 15
begins to rotate, and the ozone-containing air 13 generated within the copying machine is sucked into the propeller fan 15 and concentrated near the ozone removal device 11. The air 13 near the ozone removal device 11 is swirled by the propeller fan 15, and some of the air 13 comes into contact with the outer surface 22a of the protruding member 22, and some of the air 13 is not directly sucked into the filter member 21.
The duct 17 passes through the blade portion 15b of the propeller fan 15.
is discharged to the outside through the At this time, ozone in the air 13 that has come into contact with the outer surface 22a of the protruding member 22 comes into contact with the ozone decomposer 23 and is decomposed, and the ozone concentration in the air 13 is significantly reduced and passes through the filter member 21. Ozone is further decomposed by the ozone decomposer 23 in the filter member 21, and harmless air 13 is discharged to the outside. In the filter member 21, ozone is decomposed by the protruding member 22, and the air 13 whose ozone concentration has been significantly reduced is sucked into the filter member 21 and passes through the filter member 21.
The decrease in the ozone decomposing agent in the filter member 21 is small, the deterioration of the ozone decomposition performance is small, and the retention period of the ozone decomposition performance of the filter member 21 is significantly extended.
1, that is, the life of the ozone removal filter 20 is significantly increased.

[0015] Furthermore, the thickness of the filter member 21 can be reduced in consideration of the amount of ozone generated, and the cost can also be reduced. After using the ozone removal filter 20 for a long period of time, the protruding member 22 is held and the support member 25a on the lower side of the case 16 is unattached, and the protruding member 22 and the filter member 21 are removed from the case 16 as one unit. can be removed, and then a new ozone removal filter 20 can be attached to the case 16 by the reverse operation, and the ozone removal filter 20 can be removed.
It is extremely easy to attach and detach, and can be replaced quickly.

Next, the second ozone removal filter of the present invention
~4 Examples will be explained. FIGS. 2(a), (b) and 3 show the second to fourth ozone removal filters of the present invention, respectively.
It is a figure showing an example, and the same code is given to the same composition. Ozone removal filter 3 of the second embodiment shown in FIG. 2(a)
0 is a case where the protruding member 32 has a quadrangular pyramid shape. Figure 2
In the ozone removal filter 40 of the third embodiment shown in (b), the protruding member 42 has a cylindrical shape. Further, in the ozone removal filter 50 of the fourth embodiment shown in FIG. 3, the protruding member 52 has a rectangular cylinder shape. Cylindrical and prismatic ozone removal filters are closed at the top or bottom.

[0017]

[Effects of the Invention] As explained above, according to the present invention,
A protruding member protruding from the center of the plate-shaped filter member of the ozone removal filter toward the upstream side of the fluid is provided, and an ozone decomposing agent is contained in the outer surface of the protruding member. By removing it, the life of the ozone removal filter can be extended or the thickness can be reduced to make it cheaper. Furthermore, the ozone removal filter can be replaced easily and quickly.

[Brief explanation of the drawing]

FIG. 1 is an ozone removal device for a copying machine to which a first embodiment of the ozone removal filter of the present invention is installed, in which (a) is a perspective view showing the installed state, and (b) is a schematic cross-sectional explanatory view thereof. .

FIG. 2 is a diagram showing another embodiment of the ozone removal filter of the present invention, in which (a) is a schematic perspective view showing the second embodiment;
b) is a schematic perspective view showing the third embodiment.

FIG. 3 is a schematic perspective view showing a fourth embodiment of the ozone removal filter of the present invention.

FIG. 4 is a diagram showing a conventional ozone removal filter, (a)
is a perspective view showing the state installed on the ozone removal device, (
b) is a perspective view showing a fan in the ozone removal device.

FIG. 5 is a schematic cross-sectional view taken along arrows AA in FIG. 4(a).

FIG. 6 is a perspective view showing another conventional ozone removal filter.

[Explanation of symbols]

13 Air (fluid) 14 Ozone source side 15 Propeller fan 20, 30, 40, 50 Ozone removal filter 2
1 Filter members 22, 32, 42, 52 Projecting member 23
Ozone decomposer

Claims (2)

[Claims] Claim 1: A plate-shaped filter member that is provided substantially perpendicularly to the flow of an ozone-containing fluid discharged from an ozone generation source to the outside by a fan and that contains an ozone decomposer, and a center of the filter member. An ozone removal filter, comprising: a protruding member attached to the central part, protruding from the central part to the upstream side of the fluid flow, and having an ozone decomposing agent on at least an outer surface part. 2. The ozone removal filter according to claim 1, wherein the filter member is removably supported by a support member, and is removable together with the protruding member when the filter member reaches the end of its life.