JPH10228215A - Dust and ozone collecting device for image forming device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a dust/ozone collecting device capable of accomplishing the cost reduction without damaging each function of collecting dust/ozone as a collecting device for collecting dust/ozone by one suction device, and also, equipped with a suction dust which has a small number of parts and whose constitution is more simplified so that a space saving may be accomplished. SOLUTION: The connection duct 40 of a dust suction duct 4 connected to one suction device 3 and the connection duct 60 of an ozone suction duct 6 are constituted as an integrated connection duct 8 obtained by dividing the pass of one duct 80 into a dust pass 82 and an ozone pass 83 by a partition board 81. And, a dust collecting filler 5 is arranged in the dust pass 82, and an ozones decomposing filter 7 is arranged in the ozone pass 83.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust / ozone collecting apparatus for collecting dust and ozone generated inside an image forming apparatus such as a copying machine and a printer.

[0002]

2. Description of the Related Art In a copying machine or a printer using an electrophotographic system, contamination in a device caused by dust such as paper dust and a developer and an adverse effect on image formation are prevented.
For the purpose of preventing the ozone generated from the corona discharger from adversely affecting the human body and photosensitive materials, a so-called dust / ozone collection device is installed to collect the dust and ozone in the device and perform appropriate treatment. ing.

As a collecting device for collecting such dust and ozone, as shown in FIG. 5, air containing dust is sucked by a suction duct 102 connected to an intake device 101 and then collected by a collecting filter 103. An ozone recovery device 1 that sucks air containing ozone through a suction duct 122 connected to a suction device 121 and then decomposes ozone by a decomposition filter 123.
20 are separately provided in the image forming apparatus 200.

However, in this case, two intake devices 1
Since the suction ducts 01 and 121 and the two suction ducts 102 and 122 are used separately, this is disadvantageous in terms of cost and securing of installation space.

Therefore, conventionally, as shown in FIG. 6, one intake device 131 and one suction duct 132 are provided.
There is also known a dust / ozone recovery apparatus 130 of a type in which a collection filter 133 and a decomposition filter 134 are arranged in this order in a suction duct 132 from the upstream side in the suction direction. In this recovery device 130, air containing both dust and ozone is suctioned from the same suction duct 132 by the suction force of the common suction device 131, and the collection filter 1.
The dust is collected at 33 and then the ozone is decomposed by the decomposition filter 134.

[0006]

However, in the case of the recovery device 130, although there is an advantage that the cost and the installation space can be reduced by the use of the single suction device 131, the disassembly is performed. Since the collection filter 133 is arranged on the upstream side of the filter 134, the collection filter 133 is gradually clogged due to the collection of dust, and the pressure loss increases. However, there is a problem that it is difficult to aspirate.

Further, in such a recovery device 130, in order to increase the ozone decomposition rate by the decomposition filter 134,
The opening area of the flow path of the suction duct 132 is made as large as possible because it is necessary to reduce the flow rate of ozone in the duct to increase the contact time with the filter. Therefore, the suction duct 132 naturally has a large size,
The collection filter 133 installed in the duct 132 also needs to be of a large size. As a result, the cost was increased, and sufficient space for installing a large duct had to be secured.

Further, the collection filter 133 and the disassembly filter 134 have different filter life, but are arranged in series in the same suction duct 132. Therefore, especially when the collection filter is replaced, the disassembly filter must be removed. The replacement work of the collection filter had to be performed, which was troublesome.

Japanese Patent Application Laid-Open No. 5-19582 discloses a first guide duct for exhausting air near a corona discharger as a device for sucking ozone generated from a corona discharger and heat generated from a fixing device. And a second guide duct for exhausting air near the heat generating portion of the fixing device is connected near the outlet, and the combined exhaust duct is connected to one fan with an ozone decomposition filter interposed. Is shown. In addition, this exhaust device is provided with an opening area varying means (a means for moving a shutter through a link mechanism by a solenoid) on the first guide duct side for sucking ozone to vary the opening area. The opening area variable means reduces the opening area during corona discharge to reduce the amount of ozone discharged, thereby enhancing the ozone decomposition effect.

[0010] However, in the exhaust device disclosed in this publication, the first guide duct and the second guide duct are combined near the outlet in order to perform exhaust by one fan, but they are combined with each other. In order to enhance the disassembly effect, it is necessary to add a new part called an opening area variable means to the first guide duct, and to control the operation of the variable means, and the structure and configuration are correspondingly complicated. In addition to this, there is a problem that the cost and the installation space increase. Further, since the opening area of the first guide duct is reduced by the opening area variable means at the time of sucking ozone, ozone cannot be reliably sucked into the duct due to this. May occur.

An object of the present invention is to provide a dust and ozone collecting apparatus which can reduce the cost without impairing the collecting performance of dust and ozone as a collecting apparatus for collecting dust and ozone by using a single intake device. Is to provide. It is another object of the present invention to provide a dust / ozone collecting device provided with a suction duct having a simpler structure that can reduce the number of parts and save space. further,
It is another object of the present invention to provide a dust / ozone collecting apparatus which can easily replace a filter for collecting dust and ozone without depending on the life of other filters.

[0012]

According to a first aspect of the present invention, there is provided a dust / ozone collecting apparatus for achieving the above object.
One suction device installed in the image forming apparatus, a dust suction duct connected to the suction device and extending to a dust generation source in the image forming device, and a position near the suction device in the dust suction duct A dust collection filter for collecting dust to be sucked, and a dust collection filter connected to the suction device and extending to an ozone generation source in the image forming apparatus, and a flow passage opening area of the dust suction duct It has an ozone suction duct larger than the area, and an ozone decomposing filter attached to a position in the ozone suction duct close to the suction device and decomposing ozone to be sucked. The above-mentioned dust generation source is, for example, a developing device, and the ozone generation source is, for example, a corona discharger.

According to the first aspect of the present invention, the air containing dust is sucked from the dust suction duct by the suction force of the one suction device, and the dust is collected by the collection filter. The contained air is sucked from the ozone suction duct and ozone is decomposed by the decomposition filter. As described above, the dust and the ozone are surely sucked by the dedicated suction ducts, and are surely collected or decomposed by the filters installed in the dedicated suction ducts. And, since the flow path opening area of the ozone suction duct is larger than the flow path opening area of the dust suction duct, the flow rate of ozone in the ozone suction duct is slowed, and the contact time with the decomposition filter is prolonged. , The decomposition rate of ozone can be increased. In order to increase the decomposition rate of ozone, no special parts or devices are required, so that there is no increase in cost. In addition, since the collection filter and the disassembly filter are installed in separate ducts, the filter performance is not affected by the pressure loss of the other filter.

According to a second aspect of the present invention, there is provided the dust / ozone collecting apparatus according to the first aspect, wherein the dust suction duct is disposed near a dust generating source; The ozone suction duct is connected to a guide duct for ozone disposed near an ozone generating source, and is connected to the guide duct and the suction device. An ozone connection duct, wherein the dust connection duct and the ozone connection duct are formed by dividing a flow path of one duct into a dust flow path and an ozone flow path by a partition plate. It is characterized by being constituted by a body connection duct.

According to the second aspect of the present invention, since the connecting duct of the dust suction duct and the connecting duct of the ozone suction duct are constituted by the integrated connecting duct having the above-described structure, they have independent structures. Part of the dust suction duct and the ozone suction duct has fewer parts and a simpler structure that can save space compared to a unit in which the dust or ozone connecting ducts are simply combined and integrated. can do.

According to a third aspect of the present invention, in the dust / ozone recovery apparatus according to the second aspect, one wall surface of the flow path of the integrated connection duct is formed by a part of an exterior cover of the image forming apparatus. It is characterized by having.

According to the third aspect of the present invention, the integral connecting duct has a further reduced number of components and a simplified structure. In addition, by forming one side wall surface of the integrated connection duct with an exterior cover, an integrated connection duct configured by dividing a flow path by a partition plate can be manufactured more easily. When detached and disassembled, the inside of the duct flow path can be easily cleaned.

According to a fourth aspect of the present invention, there is provided the dust / ozone collecting apparatus according to the third aspect, wherein a dust collecting filter is detachably mounted in a dust flow path of the integrated connecting duct. An ozone decomposition filter is detachably mounted in the ozone flow path, and at least a part of an exterior cover corresponding to a mounting position of the dust recovery filter and the ozone decomposition filter is configured to be openable and closable. Things.

According to the device according to the fourth aspect, the openable and closable part of the outer cover is opened,
Since the mounting positions of the dust recovery filter and the ozone recovery filter are exposed, the replacement of both filters can be performed more easily and individually.

[0020]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention. FIG. 1 is a schematic diagram showing an image forming apparatus to which a dust / ozone collecting apparatus of the present invention is applied, and FIG. FIG. 3 is a plan view showing the configuration of the dust / ozone recovery device as viewed from above, and FIG. 3 is a sectional view taken along line AA of FIG.

The image forming apparatus shown in FIG. 1 is, for example, a copying machine or a printer employing an electrophotographic system. In the figure, reference numeral 10 denotes a photosensitive drum which rotates in the direction of arrow b;
Reference numeral 1 denotes a charging corotron formed of a conaro discharger for charging the surface of the photoconductor drum 10, LB denotes a laser beam emitted from a laser image exposure device (not shown) to the charging surface of the photoconductor drum 10, and 12 denotes an image exposure device. A developing device for developing an electrostatic latent image formed on the photoconductor drum 10 by laser beam irradiation with a developer; a corona device 13 for transferring a toner image developed on the photoconductor drum 10 to a recording sheet; A transfer corotron 14 composed of a discharger is provided for separating the recording paper after transfer from the photosensitive drum 10.
A stripping corotron 15 composed of a corona discharger, a paper transport belt 15 for transporting the recording paper after transfer to a fixing device described later, 16 a heating / pressing roll type fixing device,
Reference numeral 7 denotes a discharge tray for storing sheets to be discharged after image formation, and reference numeral 18 denotes a caster attached to the bottom of the image forming apparatus main body 1.

A dashed line P in FIG. 1 shows a flow of recording paper fed from a paper cassette or the like (not shown).
2 and 3, 1a is a frame plate on the rear side of the apparatus,
1b is a frame plate on the front side of the apparatus. If the image forming apparatus is a copying machine, image information of the original read by the original reading apparatus is input to the image exposure apparatus described above, and if the image forming apparatus is a printer, image information to be printed is input via a recording medium, communication, or the like. It is supposed to be.

In the apparatus main body 1 of the image forming apparatus thus configured, the developer, paper powder and the like floating around the developing device 12 are collected, and the charging corotron 11, the transfer corotron 13, and the peeling corotron are collected. A dust / ozone recovery device 2 for recovering ozone generated at 14 is provided.

As shown in FIGS. 1 to 3, the dust / ozone recovery device 2 in this embodiment has one intake device 3 disposed at a lower portion of the device main body 1, and is connected to the intake device 3. A dust suction duct 4 extending to a position reaching the developing device 12; a dust collection filter 5 disposed in the dust suction duct 4 for collecting dust; An ozone suction duct 6 extending to the corotron 11, the transfer corotron 13 and the peeling corotron 14, respectively, and an ozone decomposition filter 7 disposed in the ozone suction duct 6 for decomposing ozone, the main parts of which are shown. It is configured.

The above-described dust suction duct 4 is used for the developing device 1
2 and a dust connection duct 40 provided so as to connect the guide duct 41 and the air intake device 3 to each other. As for the guide duct 41, a suction part 41a connected to the suction duct 12a of the developing device 12, a relay part 41
b and the connecting portion 41c, of which the connecting portion 41c is connected to the dust connecting duct 40.

On the other hand, the above-mentioned ozone suction duct 6 comprises an ozone guide duct 61 disposed near the charging corotron 11, a transfer corotron 13 and a peeling corotron 1.
The guide duct 62 for ozone provided in the vicinity of the intake pipe 3 and the connecting duct 60 for ozone provided to connect between the guide ducts 61 and 62 and the intake device 3 are formed in combination. . As for the guide duct 61, a plurality of suction holes 65 are opened, and a suction portion 61 a, a relay portion 61 b, and a connection portion 6 arranged above the charging corotron 11.
1c, and a plurality of suction holes 66 are formed in the guide duct 62 so that the transfer corotron 13
And suction section 6 arranged below stripping corotron 14
2a, a relay section 62b and a connection section 62c. The connection portions 61c and 62c of the guide ducts are connected to the ozone connection duct 60.

The dust connecting duct 40 and the ozone connecting duct 60 are configured as an integrated connecting duct 8 as described later.

That is, as shown in FIG. 1 and FIG. 4, the integrated connecting duct 8 has a flow path of one duct frame 80 having an L-shaped box shape with one side surface opened over the entire surface. Dust passage 82 and ozone passage 8 are formed by a partition plate 81.
The dust passage 82 is used as the dust connection duct 40, and the ozone passage 83 is used as the ozone connection duct 60. The ozone connection duct 60 is connected to the channel 83
The opening area S ₁ of are partitioned by the partition plate 81 to be larger than the opening area S ₂ of the dust flow path 82 is a dust for connection duct 40. In this embodiment, as the opening area S ₁ is in particular the immediately preceding channel portion 83a of the ozone decomposing filter 7, about two times larger than the opening area S ₂ in the immediately preceding channel portion 62a of the dust collecting filter 5 You have set. However, such a relationship of the opening area may be the whole of the flow path 83, but in consideration of reduction of the installation space, as in this embodiment, before the ozone decomposition filter 7. It is preferred to have only a part. In FIG. 1, reference numeral 85 denotes an exhaust hole in which the integrated connection duct 8 is connected to the (intake port of) the intake device 3; 86, a connection intake hole in which the connection portion 41c of the dust guide duct 41 is connected; A connection suction hole 88 connected to the connection portion 61 c of the guide duct 61 is a connection suction hole 88 connected to the ozone guide duct 62.

Further, in the integrated connecting duct 8, since the dust channel 82 and the ozone channel 83 are no longer partitioned by the partition plate 81, the dust channel 82 and the ozone channel 83 join before the exhaust hole 85 connected to the intake device 3. It is structured to do. The dust collecting filter 5 is removably mounted in the dust flow path 82 on the front side of the merging portion 84 of the duct. On the other hand, the ozone decomposition filter 7 is detachably mounted in front of the duct junction 84 of the ozone flow channel 83.

The integrated connecting duct 8 is disposed in the space between the rear frame plate 1a and the outer cover 9 in the apparatus main body 1 of the image forming apparatus. The outer cover 9 is attached to the outer cover 9 so as to be in close contact with the inner surface side. Therefore,
The integrated connecting duct 8 has an open side surface of a duct frame 80 closed by an exterior cover 9, and the duct frame 8
0, one wall surface of each of the flow paths 62 and 83 and the duct confluence portion 84 is formed by a part of the exterior cover 9.

In addition, a portion 90 of the rear side outer cover 9 corresponding to the mounting position of the dust collection filter 5 and the ozone decomposition filter 7 of the integrated connection duct 8 is
It is mounted so that it can be opened and closed. That is, the cover 90 for opening and closing can be removed as shown in FIG. The opening 91 is formed in the exterior cover 9 by removing the opening / closing cover 90. The opening 91 has such a size that the dust collection filter 5 and the ozonolysis filter 7 can be attached or detached. Although the opening / closing cover portion 90 of this embodiment has a completely detachable structure, the opening / closing cover portion 90 of the present invention has a mounting structure in which one end is pivotally supported to open and close like a door. It may be something.

As shown in FIG. 3 and the like, the suction device 3 has a suction unit 30 having a built-in rotary fan for sucking air by rotation, and a drive unit having a built-in motor for rotating the fan in the suction unit 30. It comprises a part 31 and an exhaust hole 31 formed in the outer peripheral part of the suction part 30. In the suction device 3, the suction portion 30 is connected to the junction 8 of the integrated connection duct 8.
4 is attached so as to be connected to the connection intake hole 85 formed on the slope. In this embodiment, space is saved by adopting a structure in which the intake device 3 is attached to a lower slope portion of the integrated connecting duct 8. In FIG.
1c is an exhaust opening opened at the bottom of the apparatus main body 1, 35
Reference numeral denotes an exhaust duct connecting the exhaust hole 31 of the intake device 3 and the exhaust opening c.

Next, the operation of the dust and ozone recovery device 2 will be described.

First, the image forming operation of the image forming apparatus will be described. First, after the surface of the rotating photosensitive drum 10 is uniformly charged by the discharging action of the charging corotron 11, the image is applied to the charged drum surface. An electrostatic latent image is formed by scanning the laser beam LB from the exposure device according to image information. Next, after developing the electrostatic latent image with a developer supplied from the developing device 12 to form a toner image, the toner image is formed on a recording sheet P fed toward a transfer portion of the photosensitive drum 10. Is transferred electrostatically by the discharge action of the transfer corotron 13. After this transfer, the recording paper P is separated from the surface of the photosensitive drum 10 by the discharge action of the peeling corotron 14 and then sent to the fixing device 16 by the paper transport belt 15. Finally, the sheet fixed by the fixing device 16 is discharged onto a discharge tray 17. This completes the image formation on the recording paper.

Generally, while such an image forming operation is being performed, a very small amount of developer or the like may leak in the developing device 12 with the operation, and the charging corotron 11 and the transfer corotron 13 And stripping corotron 1
In No. 4, ozone is generated by corona discharge in each of these operations.

Therefore, in this image forming apparatus, the dust / ozone collecting device 2 is operated in conjunction with the image forming operation.

Specifically, the dust / ozone recovery device 2
When the image forming operation is started, the suction device 3 starts operating. By the operation of the suction device 3, the fan in the suction unit 30 is rotated, and the suction action is simultaneously applied to the dust suction duct 4 and the ozone suction duct 6. That is, the suction action extends from the connection duct 40 to the guide duct 41 in the dust suction duct 4, and from the connection duct 60 to the guide ducts 61 and 62 in the ozone suction duct 6.

Accordingly, in the developing device 12 in which the guide duct suction portion 41a of the dust suction duct 4 is installed, the developer and the like floating around the developing device 12 are sucked together with the air from the suction duct 12a. The sucked developer and the like pass through the guide ducts 41 a, 41 b, and 41 c in this order, are guided to the flow path 82 of the integrated connection duct 8 which is the connection duct 40, and are collected by the collection filter 5. . After the developer or the like has been collected, the air is sent from the junction 84 of the integrated connection duct 8 to the suction unit 30 of the suction device 3 through the connection suction hole 85, and then is discharged through the discharge hole 32. It is discharged from the unit 1c to the outside of the apparatus.

On the other hand, in the charging corotron 11 provided with the guide duct suction portion 61a of the ozone suction duct 6,
Ozone generated by corona discharge during charging is sucked together with air from the suction port 65 of the suction part 61a. The sucked ozone and the like are supplied to the guide ducts 61a, 61b, 61c.
After passing through in this order, it is led to the flow path 83 of the integrated connection duct 8 which is the connection duct 60, and is decomposed by the decomposition filter 7. In the transfer and peeling corotrons 13 and 14 in which the guide duct suction portions 62a are installed, ozone generated by corona discharge during transfer and peeling is sucked together with air from the suction ports 66 of the suction portions 62a.
The sucked ozone or the like is supplied to the guide ducts 62a and 62d.
b, 62c in this order and then the integrated connecting duct 8
And is decomposed by the decomposition filter 7.

At this time, since there is no other filter on the upstream side of the duct of the decomposition filter 7, ozone can be sucked into the decomposition filter 7 with a sufficient air flow without being affected by pressure loss by the other filters. .

At this time, the flow path 83 of the ozone connection duct 60 has an opening area just before the decomposing filter 7 and the opening area of the flow path 82 of the dust connection duct 40 just before the collection filter 5 as described above. Is formed so as to be larger than the opening area of the decomposition filter 7, and the contact time of the sucked ozone with the decomposition filter 7 is prolonged due to the slow flow rate in the flow path 83. As a result, the ozone decomposition rate of the decomposition filter 7 is increased, so that ozone can be sufficiently decomposed. As a result, the dust collection filter 5 having a smaller diameter than the ozone decomposition filter 7 can be used due to the size relationship of the opening areas of the flow paths.

The air after the ozonolysis is performed in the same manner as the air after dust collection described above.
After being sent from the junction 84 to the suction portion 30 of the suction device 3 through the connection suction hole 85, the air is discharged from the exhaust opening 1c through the exhaust hole 32 to the outside of the device. Then, almost simultaneously with the end of the image forming operation, the suction device 3 of the collection device 2 also stops.

When the dust / ozone collecting device 2 operates as described above, the developer and the like generated in the developing device 12 are sucked and collected, so that the main body 1 of the image forming apparatus due to dust such as the developer is collected. Internal contamination can be prevented, and deterioration of image quality can be prevented. Moreover, ozone generated in the charging corotron 11, the transfer corotron 13, the peeling corotron 14, and the like is sucked and decomposed, so that the ozone can be prevented from adversely affecting the human body, the photosensitive material, and the like.

When one or both of the dust collection filter 5 and the ozonolysis filter 7 reach the end of their life, the collecting device 2 removes the outer cover 9 as shown in FIGS. After removing the opening / closing cover 90, the necessary replacement work of the filters 5 and 7 can be performed.

That is, by removing the opening / closing cover 90, an opening 91 is formed in the outer cover 9, and the dust collecting filter 5 and the ozone decomposition filter 7 are located inside the opening 91 inside the apparatus. ing. For this reason, the old dust collection filter 5 and the ozone decomposition filter 7, which are detachably attached to the respective flow paths 82 and 83, can be removed and replaced with new ones. After the replacement work is completed, the opening / closing cover 90 may be attached again to close the opening 91. As described above, the replacement of the dust collection filter 5 and the ozonolysis filter 7 can be performed extremely easily. Also,
Since both filters 5 and 7 are installed in different flow paths, they can be replaced at any time without being affected by the life of the other filters. A problem such as the prior art that a filter to be replaced has to be attached from the device cannot occur.

Further, in the recovery device 2, since one wall surface of the integrated coupling duct 8 is formed by a part of the outer cover 9, the number of parts can be reduced and the cost can be reduced. The space can be reduced a little, and the occurrence of dead space in the installation space of the connecting duct can be prevented. In addition, since the integrated connection duct 8 can form the dust connection duct 40 and the ozone connection duct 60 simply by partitioning the flow path of one duct frame 80 by the partition plate 81, it is inexpensive. Can be provided. Since the integral connecting duct 8 has a structure in which one wall surface is formed by the outer cover 9, the partition plate 81 is provided.
The partitioning operation (production operation) of the flow path by the above is easy, and the inside of the flow path can be easily cleaned by removing from the exterior cover 9. Since the inside of the flow path can be easily cleaned, the integrated coupling duct 8 can be easily recycled.

In this embodiment, the case where the dust connecting duct 40 and the ozone connecting duct 60 are formed as an integrated connecting duct 8 is exemplified. However, the present invention is not limited to this. , 60 may be formed separately. However, the configuration like the integrated connection duct 8 is advantageous in various points as described above.

[0049]

As described above, according to the first aspect of the present invention, dust and ozone can be reliably sucked by the respective dedicated suction ducts by the single suction device, and each dedicated suction duct can be used. The filter installed in the duct can reliably collect or disassemble.
In particular, ozone can be sufficiently decomposed by a decomposition filter simply by making the flow path opening area of the ozone suction duct larger than the flow path opening area of the dust suction duct. That is, since no special components or devices are required, the cost does not increase and the cost can be reduced. In addition, since the collection filter and the disassembly filter are installed in separate ducts, the filter performance is not affected by the pressure loss of the other filter.

According to the second aspect of the present invention, the connecting duct for the dust suction duct and the connecting duct for the ozone suction duct are constituted by the integrated connecting duct as described above, so that the dust connecting ducts having independent structures are provided. Alternatively, part of the dust suction duct and the ozone suction duct can have a simple structure with a reduced number of parts and space saving as compared with a unit in which the ozone connection ducts are simply combined and integrated.

Further, according to the third aspect of the present invention, the integral connecting duct is further reduced in the number of components by the amount that one wall is formed by the outer cover, and the structure is simplified. Further, since the one-side wall surface of the integrated connecting duct is open, the operation of manufacturing the integrated connecting duct by dividing the flow path by the partition plate can be performed more easily. Further, when the outer cover is removed, the inside of each flow path of the integrated connection duct can be easily cleaned, which is advantageous when, for example, the integrated connection duct is recycled.

Further, according to the fourth aspect of the invention, by opening the openable part of the outer cover, the work of replacing the dust collection filter and the ozone collection filter can be performed more easily and individually. . As a result, the filter replacement life can be individually set without being affected by the life of the other filter.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an image forming apparatus to which a dust / ozone recovery device according to an embodiment of the present invention is applied.

FIG. 2 is a plan view showing a configuration of a dust / ozone recovery device.

FIG. 3 is a sectional view taken along line AA of FIG. 2;

FIG. 4 is an exploded perspective view showing a main part of the dust / ozone recovery device.

FIG. 5 is an explanatory view showing an example of a conventional collecting device.

FIG. 6 is an explanatory view showing another example of a conventional recovery device.

[Explanation of symbols]

2. Dust and ozone recovery device, 3 .... intake device, 4 .... dust suction duct, 5 ... dust collection filter, 6 ... ozone suction duct, 7 ... ozone decomposition filter, 8 ... integrated connection duct, 9 ... exterior cover, 81: Partition plate, 82: Dust channel, 83: Ozone channel, 90: Openable / closable cover part.

Claims (4)

[Claims] An air suction device installed in the image forming apparatus; a dust suction duct connected to the air suction device and extending to a dust generation source in the image forming apparatus; A dust collection filter attached to a position near the suction device for collecting dust to be sucked; and a dust collection filter connected to the suction device and extending to an ozone generation source in the image forming apparatus. It is characterized by comprising an ozone suction duct larger than the flow passage opening area of the duct, and an ozone decomposition filter attached to a position near the suction device in the ozone suction duct and decomposing ozone to be sucked. Dust / ozone recovery device for image forming equipment. 2. The dust suction duct includes a dust guide duct disposed in the vicinity of a dust generation source, a dust connection duct connecting between the guide duct and an intake device, and the dust suction duct. The suction duct includes an ozone guide duct disposed near the ozone generation source, and an ozone connection duct connecting the guide duct and the suction device. Connecting duct
2. The dust / ozone recovery device according to claim 1, wherein the duct / ozone recovery device is constituted by an integrated connection duct in which a flow path of one duct is divided into a flow path for dust and a flow path for ozone by a partition plate. 3. The dust and ozone recovery device according to claim 2, wherein one wall surface of the flow path of the integrated connection duct is formed by a part of an exterior cover of the image forming apparatus. 4. A dust recovery filter is removably mounted in the dust channel of the integrated connection duct, and an ozone decomposition filter is removably mounted in the ozone channel. 4. A mounting structure in which a part of an outer cover corresponding to a mounting position of a recovery filter and an ozonolysis filter is openable and closable.
Dust / ozone recovery device as described.