JPH0358063A - Electrostatic recording device having structure for decreasing and discharging ozone - Google Patents

Abstract

PURPOSE:To decrease the ozone component in the air discharged from an exhaust fan by mixing the ozone-contg. air around an electrifier and toner transfer device with the high-temp. high-humidity air from a heat fixing device. CONSTITUTION:A discharge path 38 for introducing the high-temp. high-humidity air generated from the heat fixing device 24 is connected to the discharge path 36 consisting of a discharge path part 36a for guiding the ozone-contg. air around the electrifier 12 to the exhaust fan 28 and a discharge path part 36b for guiding the ozone-contg. air around the toner transfer device 18 to the fan 28 to decrease the ozone component in the ozone-contg. air. A ozone filter 32 is preferably installed at the down stream side than part 36c which the part 36c is joined with the part 36b, therefore, the air from which the ozone component is removed is then discharged.

Description

[Detailed Description of the Invention] [Summary] This invention relates to an electrostatic recording device using electrophotographic recording technology, more specifically relates to an ozone reduction exhaust structure incorporated in the electrostatic recording device, and relates to a thermal fixing device used in the electrostatic recording device. Focusing on the point that high-temperature, high-humidity air is generated from the ozone-containing air, the high-temperature, high-humidity air is mixed with the ozone-containing air from the charger and toner transfer device, thereby reducing the ozone content of the ozone-containing air. The purpose of the present invention is to provide an electrostatic recording device, which includes a charger that applies charge to an electrostatic latent image carrier to form a charged area, an optical exposure means that writes an electrostatic latent image in the charged area, and an electrostatic latent image carrier. A toner developing device that develops an image with charged toner to make a visible image, and a toner developing device that applies a recording medium to the charged toner image and applies a charge of opposite polarity to the charged toner image to the recording medium from the back side to form a charged toner image. A toner transfer device that electrostatically transfers the toner image onto the recording medium, a heat fixing device that heat-fixes the transferred toner image onto the recording medium, a charging device, an optical exposure means, a toner developing device, a toner transfer device, and a heat fixing device. In an electrostatic recording device equipped with a housing containing a charger and an exhaust fan attached to the housing wall, the inside of the housing must be cooled by forced ventilation. A first exhaust path is arranged to guide the contained air to the exhaust fan side, and a second exhaust path is arranged to introduce high-temperature, high-humidity air generated from the heat fixing device into the first exhaust path. An electrostatic recording device characterized by being connected to a.

[Industrial Field of Application] The present invention relates to an electrostatic recording device using electrophotographic recording technology, and more particularly to an ozone reduction exhaust structure incorporated into the electrostatic recording device.

As is well known, in electrophotographic recording technology, a uniformly charged area is provided on the surface of an electrostatic latent image carrier, such as a photosensitive drum, and an electrostatic latent image is formed on the charged area using optical exposure means. ,
This electrostatic latent image is developed with charged toner to become a visible image, and a recording medium such as recording paper is applied to the charged toner image, and a charge of opposite polarity to the charged toner is applied to the recording medium from the back side. and electrostatically transfer the charged toner image onto the recording medium, and send the recording medium carrying the transferred toner image to, for example, a heat fixing device to thermally fix the transferred toner image on the recording medium, As a result, a toner recorded image is obtained on the recording medium.

In an electrostatic recording device using such electrophotographic recording technology, a charger is used to provide a uniform charging area to an electrostatic latent image carrier, and a charger is used to transfer a charged l/color image to a recording medium. Both of the I/N transfer devices used are separated from, for example, a corona discharger, and such a corona discharger generates a large amount of ozone which is harmful to the human body. On the other hand, in such an electrostatic recording apparatus, the interior thereof is in a high-temperature environment due to the use of a heat fixing device that heat-fixes the transferred toner image to the recording medium. When the internal temperature of an electrostatic recording device increases, not only does it accelerate the deterioration of the various electronic components used in its control section, but it can also cause burns to maintenance workers when maintaining the electrostatic recording device. It also poses a safety issue. Furthermore, a problem associated with the rise in internal temperature of electrostatic recording devices is that when the toner temperature becomes high, the amount of charge on the toner decreases, and as a result, so-called fogging occurs during toner development, reducing the quality of recorded images. When the electrostatic latent image carrier, that is, the photosensitive drum is placed under high temperature conditions,
The sensitivity characteristics change and the toner density of the recorded image fluctuates, or in the worst case, the shape of the electrostatic latent image becomes impossible.

Therefore, an exhaust fan is generally attached to the housing wall of the electrostatic recording device, and this exhaust fan creates forced ventilation inside the electrostatic recording device to cool the inside of the device. However, at this time, it is necessary to prevent the ozone generated in the charger and toner transfer device from being discharged to the outside of the electrostatic recording apparatus by the exhaust fan.

(Prior Art) Referring to FIG. 6, there is shown a schematic diagram of an electrostatic recording device incorporating a conventional ozone reduction exhaust structure. The photosensitive drum 10 is rotated in the direction indicated by arrow A during recording operation.A charger 12, an optical exposure means 14,
A toner developing device 16 and a toner transfer device 18 are sequentially arranged. The charger 12 charges the photosensitive drum 10 to form a uniformly charged area thereon, and an electrostatic latent image is written in the tjF charged area by an optical exposure means 14, for example, a laser beam scanning system. The electrostatic latent image is developed with charged toner by a toner developer 16 into a visible image.

When the charged toner image reaches the toner transfer device 180 by rotation of the photosensitive drum 10, a recording medium such as recording paper P is fed between the photosensitive drum 10 and the charger 18 along the guide plate 20, and At this time, a charge having a polarity opposite to that of the charged toner image is applied to the recording medium P by the toner transfer device l8, so that the charged toner image is transferred to the photosensitive drum I.
The image is transferred from O to the recording paper P side. The transferred toner image is sent along the guide plate 25 along with the recording paper P to the thermal fixing device 24, where the transferred toner image is thermally fixed onto the recording paper P.

The heat fixing device 24 is composed of, for example, a heat roller 24a and a backup roller 24b, and the transferred toner image is thermally fused to the recording sleeve P by passing the recording sleeve P carrying the transferred toner image between the two rollers. It turns out.

As shown in FIG. 6, the t! All of the elements are housed in a housing 26 of the electrostatic recording device, and an exhaust fan 28 is mounted at a suitable location on the wall of the housing 26, by which a forced air flow inside the electrostatic recording device is provided. A draft is created, which in particular causes the heat generated in the thermal fuser 24 to be exhausted to the outside of the electrostatic recording device.

As mentioned above, the charger 12 and the toner transfer device 18
Since both of them are prevented by a corona discharger or the like which generates a large amount of ozone which is harmful to the human body, it is necessary to prevent such ozone from being discharged to the outside of the electrostatic recording apparatus by the exhaust fan 28. Therefore, a guide partition plate 30 as shown in FIG. 6 is disposed in the conventional electrostatic recording apparatus, and these guide partition plates 30 transfer ozone generated from the charger l2 and the toner transfer device 18 to the ozone filter 3.
I'm trying to lead to 2. That is, the ozone-containing air around the charger 12 and the toner transfer device 18 is passed through the ozone filter 32 and then exhausted to the outside of the electrostatic recording device by the exhaust fan 28, and the ozone content of the ozone-containing air is reduced to ozone. It is intended to be removed upon passing through filter 32.

[Problem to be solved by the invention]

By the way, the amount of ozone generated depends on temperature and humidity. That is, ozone is easily generated in a low temperature, low humidity environment, and ozone is difficult to generate in a high temperature, high humidity environment. Therefore, when such an electrostatic recording device is used in a low-temperature, low-humidity environment where ozone is likely to be generated, ozone will be generated that exceeds the ozone removal capacity of the ozone filter, and a considerable amount of ozone will be absorbed into the electrostatic recording device. The problem is that it can be discharged to the outside.

An object of the present invention is to focus on the fact that high-temperature, high-humidity air is generated from a heat fixing device used in an electrostatic recording device, and to mix the high-temperature, high-humidity air with ozone-containing air from a charger and a toner transfer device. An object of the present invention is to provide an electrostatic recording device that can thereby reduce the ozone content of the ozone-containing air.

[Means to solve the problem]

The electrostatic recording device according to the present invention includes a charger that applies charge to an electrostatic latent image carrier to form a charged area, an optical exposure unit that writes an electrostatic latent image on the charged area, and an optical exposure device that writes an electrostatic latent image on the charged area. A toner developing device that develops a visible image with charged toner, and a recording medium applied to the charged toner image, and an electric charge having a polarity opposite to that of the charged toner image applied to the recording medium from the back side of the charged toner image. a toner transfer device that electrostatically transfers the transferred toner image onto the recording medium, a thermal fixing device that thermally fixes the transferred toner image onto the recording medium, a charger, an optical exposure means, a toner developer, a toner transfer device, and a thermal fixing device. The fixing device includes a housing that accommodates a fixing device, and an exhaust fan attached to a wall of the housing to forcibly ventilate the inside of the housing for cooling.

In the electrostatic recording device according to the present invention, in order to achieve this purpose, a first exhaust path is arranged to guide ozone-containing air around the charger and toner transfer device to the exhaust fan side, and The present invention is characterized in that a second exhaust path for introducing high-temperature, high-humidity air generated from the fixing device into the first exhaust path is connected to the first exhaust path.

[For production]

When the recording paper that carries the transferred toner image, that is, the recording medium, passes through the heat fixing device, the moisture contained therein evaporates, and as a result, high temperature, high humidity air is generated from the heat fixing device, and this high temperature, high humidity air is introduced into the first exhaust passage by the second exhaust passage and mixed with the ozone-containing air in the first exhaust passage, resulting in a reduction in the ozone content of the ozone-containing air. When an electrostatic recording device is always used in a high temperature and high humidity environment, the amount of ozone generated by the charger and toner transfer device is small, and therefore the high temperature and high humidity air from the heat fixing device is routed through the first exhaust path. Ozone can be sufficiently reduced just by introducing it into the air, so there is no need for an ozone filter like in the past. However, when an electrostatic recording device is used in a low-temperature, low-humidity environment, it is not possible to sufficiently reduce ozone by simply introducing high-temperature, high-humidity air from the heat fixing device into the first exhaust path. Therefore, in that case, it is necessary to use an ozone filter in the first exhaust path. [Embodiment] Next, an embodiment of the electrostatic recording apparatus according to the present invention will be described with reference to FIGS. 1 to 4 of the accompanying drawings.

First, referring to FIG. 1, the principle structure of the electrostatic recording device according to the present invention is shown, and in FIG. number is used.

As shown in FIG. 1, in the electrostatic recording apparatus according to the present invention, a first exhaust path 36 is arranged to guide ozone-containing air around the charger and toner transfer device to the exhaust fan side. The first exhaust passage 36 is formed by suitably arranging a guide partition temporary element within the housing 26. Specifically, the first exhaust path 36 is an exhaust path portion 3 that guides ozone-containing air around the charger 12 to the exhaust fan 28.
6a, and an exhaust path portion 36b that guides ozone-containing air around the toner transfer device 18 to the exhaust fan 28, and both exhaust path portions 36a and 36b are joined at a point indicated by the reference numeral 36. Further, a second exhaust passage 3 for introducing high-temperature, high-humidity air generated from the heat fixing device 24 into the first exhaust passage 36 is connected in the middle of the exhaust passage portion 36b of the first exhaust passage 36. Therefore, the high temperature, high humidity air from the thermal fuser 24 is first mixed with the ozone-containing air from the toner transfer device 1, and then mixed with the ozone-containing air from the charger 12 at the confluence point 36c of the exhaust path sections 36a and 36b. I am made to do so.

In this way, the ozone-containing air from the charger 12 and the toner transfer device 18 is transferred to the heat fixing device 2 before reaching the exhaust fan 2.
4, the ozone content of the ozone-containing air is reduced before being discharged to the outside of the electrostatic recording device. When the electrostatic recording device is always used in a high temperature and high humidity environment, the amount of ozone in the ozone-containing air from the charger 12 and the toner transfer device 1 is small, and the ozone content is absorbed from the heat fixing device 24. This can be sufficiently reduced by mixing in high-temperature, high-humidity air.

On the other hand, when the electrostatic recording device is used in a high temperature and high humidity environment, the ozone content of the ozone-containing air from the charger 12 and the toner transfer device 18 increases, so the ozone content is transferred to the heat fixing device. It cannot be reduced only by mixing the low temperature, low humidity air from 24.

In this case, as shown in FIG. 1, an ozone filter 32 is provided in the first exhaust path 36 on the downstream side of the confluence point 36c of the exhaust path portions 36a and 36b.

According to such a structure, when a gas mixture of ozone-containing air and high-temperature, high-humidity air passes through the ozone filter 32, a portion of the ozone is further removed by the ozone filter 32. As a result, air from which a sufficient amount of ozone has been removed is exhausted to the outside of the electrostatic recording apparatus by the exhaust fan 28.

Referring to FIG. 2, a laser printer is shown as an electrostatic recording device embodying the present invention, and the laser printer includes a housing 40. As shown in FIG. The main components of the laser printer include a recording paper feeding section 42 provided on the bottom side of the housing 40, a recording section 44 and a fixing section 46 provided inside the housing 40, and a recording paper feeding section 42 provided on the bottom side of the housing 40, a recording section 44 and a fixing section 46 provided inside the housing 40, and a recording paper feeding section 42 provided on the bottom side of the housing 40; It consists of a built-in recording paper ejection section 48.

A feeding tray 42a is disposed in the recording paper feeding section 42 so as to be removable and removable, and a stack of recording papers is accommodated in the feeding tray 42a. The recording paper is fed out one by one by the big roller 42b, and the fed out recording paper is conveyed along the guide plate 42d by a pair of conveyance rollers 42c. A standby roller 42e is provided on the recording section 44 side of the guide plate 42d, and the recording paper is placed on the standby roller 42e.
The recording medium is temporarily stopped by the standby roller 42e, and is fed into the recording section 44 by the standby roller 42e in accordance with the recording timing in the recording section '44.

A photosensitive drum 50 is disposed in the recording section 44 as an electrostatic latent image carrier, and the photosensitive drum 50 is rotated at a constant speed in the direction shown by arrow B during recording operation. Around the photosensitive drum 50, a charger 52, a toner developer 54,
A toner transfer device 56, a static eliminator 57, and a cleaner 53 are provided. The recording unit 44 also includes an optical unit 60 disposed above the housing 40, and this optical unit 60 includes a laser light source and modulates the laser beam generated from the laser light source based on the video signal. A modulator and a polygon mirror for scanning the photosensitive drum 50 along its generatrix direction with the modulated laser beam are provided.

As mentioned above, the charger 52 can be charged by a corona discharger or the like, and the corona discharger applies an electric charge to the photosensitive drum 50 to form a uniformly charged area. . An electrostatic latent image is written on the charged area on the photosensitive drum 50 by a scanning laser beam of an optical unit 60 .

The electrostatic latent image written on the photosensitive drum 50 is developed by a toner developer 54 into a visible image.

In this embodiment, the toner developing device 54 uses a developer called toner, which is composed of a toner and a magnetic powder carrier. Therefore, a developing roller 54a of the toner developing device 54 has a built-in magnet, and a magnet is placed around the developing roller 54a of the toner developing device 54. A magnetic brush is formed by the magnetic powder carrier of the two precepts toner. That is,
The developing roller 54a is rotationally driven in the direction of arrow C during a developing operation, and uses its magnetic brush to convey developer, that is, toner, to the photosensitive drum IO side. A paddle roller 54b is provided in the toner developing device 54, and this paddle roller 5
The developing roller 4b is rotated in the opposite direction to the developing roller 54a and sends a portion of the toner toward the developing roller 54a, so that the developing roller 54a can always convey a sufficient amount of toner. The paddle roller 54b also has another function of agitating the toner and the magnetic powder carrier to triboelectrically charge the toner, so that the toner transported by the developing roller 54a, that is, the charged toner, forms an electrostatic latent image on the photosensitive drum 54a. will be electrostatically attached to the surface. Further, in the toner developing device 54, there is a blade 5 that regulates a magnetic brush formed on the developing roller 54a to a constant height.
4c is also provided, whereby the amount of toner conveyed by the developing roller 54a is made constant, and as a result, variations in the developer density due to fluctuations in the amount of toner conveyed are eliminated. Furthermore, a flow path plate 54d is disposed in the toner developing device 54 close to the blade 54c, and the flow path plate 54d is configured to return the two commandments toner that has been regulated and removed by the blade 54c to the paddle roller 54b side. Function. Note that reference numeral 54e indicates a toner replenisher, and this toner replenisher 5
4e is for appropriately replenishing toner according to the development consumption of toner among the two predetermined toners in the toner developing device 54.

The charged toner image developed by the toner developing device 54 is transported to the toner transfer device 56 side as the photosensitive drum 50 rotates, and at this time, the recording paper is transferred to the standby roller 4 at a predetermined timing.
2e between the photosensitive drum 50 and the toner transfer device 56. The toner transfer device 56 is also composed of, for example, a corona discharger, and this corona discharger applies an electric charge of opposite polarity to the charged toner image to the recording paper, so that the charged toner image is statically transferred from the photosensitive drum 50 side to the recording paper side. is electrically attracted,
As a result, the charged toner image is transferred.

The recording paper carrying the transferred toner image is fed into the heat fixing section 46 by a guide plate 62. On the other hand, the area from which the charged toner image has been transferred and removed from the photosensitive drum 50 is irradiated by a static eliminator, ie, a suitable static eliminator lamp 57, whereby residual charges are released and removed therefrom. Then,
The area is cleaned by cleaner 58 to remove residual toner, etc. therefrom. In this embodiment, the cleaner 58
A fur brush 58a that is rotated so as to come into wiping engagement with the photosensitive surface of the photosensitive drum 50;
Scraper 58 for scraping off toner adhering to a
b, and a discharge screw 58c for discharging the toner scraped off by the scraper 58b from inside the casing of the cleaner 58.

The heat fixing device 46 includes a heat roller 46a and a backup roller 46b that is brought into pressure contact with the heat roller 46a.
When the recording paper carrying the transferred toner image is passed between the heat roller 46a and the backup roller 46b, the transferred toner image is transferred to the heat roller 46a.
The transferred toner image is heated and thermally melted, and as a result, the transferred toner image is fixed on the recording medium.

1=1 During heating by the roller 46a, the water contained in the recording paper evaporates, so that the area around the heat fixing device 46 becomes high temperature and high humidity. Incidentally, reference numeral 46c indicates a separation claw that engages with recording paper that tends to adhere to and get wound up on the heat roller 46a and separates it from the heat roller 46a.

The recording paper discharged from the thermal fixing device 46, that is, the recording paper carrying the fixed toner image, is sent to the recording '@ discharge section 48 and discharged to the outside of the housing 40. In this embodiment, the recording paper guide plate 48a curves upward from the recording paper discharge side of the heat fixing device 46 and extends to the top wall side of the housing 40, and the recording paper guide plate 48a extends along the recording paper guide plate 48a. The rollers 48b, 48c and 48d are arranged at appropriate intervals. The recording paper is conveyed by the conveyance roller 48b,
By engaging with 48c and 48d, the recording guide plate 48
a, and is finally discharged onto the top wall of the housing 40.

Since the inside of the housing 40 is at a high temperature especially due to the use of the heat fixing device 46, the inside thereof is cooled by the exhaust fan 62. That is, the exhaust fan 62 is connected to the housing 40
(in the embodiment shown in FIG. 2, the side wall on the opposite side to the plane of the paper in FIG. 2), the exhaust fan 62 generates forced ventilation in the housing 40 to remove the inside thereof. Suppress temperature rise. In this case, as described above, ozone generated from the charger 52 and the toner transfer device 56 is removed from the housing 40 by the exhaust fan 62.
It is necessary to prevent it from being discharged to the outside. To this end, the laser printer shown in FIG. 1 incorporates an ozone reduction exhaust structure constructed in accordance with the present invention.

In this embodiment, such an ozone reduction exhaust structure is provided by the charger 52.
and a first exhaust path 6 arranged to guide ozone-containing air around the toner transfer device 56 to the D-air fan 62 side.
4, and a second exhaust path 6 arranged to introduce high-temperature, high-humidity air from the heat fixing device 24 into the first exhaust path 64.
It is composed of 6. To be more specific, the first exhaust path 6
4 is an exhaust fan 6 that exhausts ozone-containing air around the charger 52.
2, and an exhaust path portion 6 that leads the ozone-containing air around the toner transfer device 56 to the exhaust fan 62.
4b. The exhaust path portion 64a is the optical unit 60
a partition wall 68 extending between both side walls of the housing 40 to hold the charger 52; a hanging wall 70 suspended from the partition wall 68 close to the charger 52; and a hanging wall 70 that partially covers the outside of the cleaner 58. and a substantially horizontal portion of the substantially L-shaped cross-section cover wall 72. On the other hand, the exhaust passage portion 64b includes the bottom wall plate 14 which is disposed at the bottom of the housing 40 and extends between both side walls thereof, and the upright wall portion which is disposed below the temporary guide 62 and which is closer to the toner transfer device 56. a wall plate 76 with a substantially L-shaped cross section; a plate 78 (a passage section is formed on the lower side of this upright wall plate 78 through which the recording paper discharged from the heat fixing device 46 passes);
A cover wall plate 8 that covers the bottom of the heat fixing device 46 and the recording paper ejection side thereof and slopes toward the upper side of the heat fixing device 46
0 (Note that there is also a heat fixing device 4 on the lower side of this cover wall plate 80.
6) and a portion of the substantially vertical portion of the substantially L-shaped cross-section cover wall 72. As shown in Figure 2, upright wall +
7i78 includes an extended wall plate portion 78a that further extends in a substantially vertical direction from the tip side of the inclined portion and extends parallel to the partition wall 68, whereby the exhaust path portion 64b merges with the exhaust path portion 64a. The second exhaust passage 66 is defined by the inclined portion of the cover wall plate 80 and a portion of the generally vertical portion of the generally L-shaped force bar wall 72 such that the second exhaust passage 66 is The first one on the tip side of the inclined part.
The exhaust passage portion 64b of the exhaust passage 64 is opened. Note that reference number 82 indicates an ozone filter provided between the partition wall 63 and the extended wall plate portion 78a of the upright wall plate 78.

With the structure described above, the ozone-containing air around the charger 52 is guided to the exhaust fan 62 side by the exhaust path portion 64a, and the ozone-containing air from the toner charger 56 is guided to the exhaust fan 62 side by the exhaust path portion 64b. , before the ozone-containing air reaches the exhaust fan 62, the heat fixing device 46
This reduces the ozone content of the ozone-containing air. When the laser printer shown in FIG. 2 is always used in a high-temperature, high-humidity environment, the amount of ozone generated by the charger 52 and the toner transfer device 56 is relatively small, so the high-temperature, high-humidity air from the heat fixing device 46 is Just by mixing it with ozone-containing air, a certain amount of ozone can be sufficiently reduced. Therefore, in that case, the ozone filter 82 may be omitted. However, when the laser printer shown in FIG. 2 is used in a low temperature and low humidity environment, the charger 52 and the toner transfer device 5
Since the amount of ozone generated in case 6 is relatively large, an ozone filter 82 must be provided in this case.

FIG. 3 is an enlarged view showing the toner developing device 54 together with the photosensitive drum 50. As is clear from the figure, the casing of the toner developing device 54 is covered with a urethane rubber sheet 84.
is attached, and the gap between the casing and the photosensitive drum 50 is closed by this urethane rubber sheet 84. Such precautions prevent the developing toner from scattering, thereby avoiding a situation where the toner is taken into the exhaust path portion 64a. In addition, Fig. 4 shows the cleaner 58.
5 is an enlarged view showing the photosensitive drum 50 together with the photosensitive drum 50. As is clear from the same figure, a urethane rubber sheet 86 is also attached to the casing of the cleaner 58, and the urethane rubber sheet 86 connects the casing and the photosensitive drum 50.
The gap between the two is closed. As in the case described above, the toner thrown up by the fur brush 58a is prevented from scattering, and the toner is prevented from being taken into the exhaust passage portion 64a.

〔Effect of the invention〕

The graph shown in Figure 5 shows various types of electrostatic recording devices A and B.
, C, D, E, and F, the relationship between ozone concentration and temperature/humidity before and after implementing the present invention is shown. From this graph, the following table can be drawn. is obtained.

As is clear from the above table, by incorporating the ozone-reducing exhaust structure according to the present invention into an electrostatic recording device, the temperature of ozone-containing air can be increased from 1O°C to 25°C, and the relative humidity can be increased to 20%R}I. When increasing the RH from to 50%RH,
It can be seen that the ozone concentration is reduced to about 1/3.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the principle structure of the present invention, FIG. 2 is a longitudinal cross-sectional view of a laser printer embodying the present invention, and FIG. 3 is an enlarged view showing a toner developer together with a photosensitive drum. Fig. 4 is an enlarged view showing the cleaner together with the photosensitive drum, and Fig. 5 shows the ozone concentration and temperature before and after implementing the present invention for various types of electrostatic recording devices. FIG. 6 is a schematic diagram of an electrostatic recording device having a conventional ozone reduction exhaust structure. 50... Photosensitive drum, 52... Charger, 54...
...Developer, 56...Toner transfer device, 57
...Static eliminator, 58...Cleaner, 60.
...Optical unit, 62...Exhaust fan, 64.
...first exhaust path, 66...second exhaust path, 82.
...Ozone filter. Figure 1: An enlarged view of the toner developer Figure 3: An enlarged view of the cleaner Graph showing the effects of the present invention Figure 5

Claims (1)

[Scope of Claims] 1. A charger that applies charge to an electrostatic latent image carrier to form a charged area, an optical exposure means that writes an electrostatic latent image on the charged area, and an optical exposure device that writes an electrostatic latent image on the charged area. A toner developing device that develops a visible image with charged toner, and a recording medium applied to the charged toner image, and an electric charge having a polarity opposite to that of the charged toner image applied to the recording medium from the back side of the charged toner image. a toner transfer device that electrostatically transfers the transferred toner image onto the recording medium; a heat fixing device that heat-fixes the transferred toner image onto the recording medium; the charger, the optical exposure means, the toner developer, and the toner image. An electrostatic recording apparatus comprising a housing that accommodates a transfer device and the heat fixing device, and an exhaust fan attached to a wall of the housing to forcibly ventilate and cool the inside of the housing. A first exhaust path is arranged to guide ozone-containing air around the toner transfer device toward the exhaust fan, and a first exhaust path is configured to introduce high-temperature, high-humidity air generated from the heat fixing device into the first exhaust path. An electrostatic recording device characterized in that a second exhaust path is connected to the first exhaust path. 2. In the electrostatic recording device according to claim 1, an ozone filter is provided at a portion of the first exhaust path through which the mixed gas of the ozone-containing air and the high temperature and high humidity air passes. An electrostatic recording device characterized by: