JPH01263668A - Fan for image forming device - Google Patents

Fan for image forming device

Info

Publication number
JPH01263668A
JPH01263668A JP63092937A JP9293788A JPH01263668A JP H01263668 A JPH01263668 A JP H01263668A JP 63092937 A JP63092937 A JP 63092937A JP 9293788 A JP9293788 A JP 9293788A JP H01263668 A JPH01263668 A JP H01263668A
Authority
JP
Japan
Prior art keywords
ozone
image forming
speed
wind speed
copying
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP63092937A
Other languages
Japanese (ja)
Inventor
Yoshitaka Masuda
義隆 増田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Canon Inc
Original Assignee
Canon Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Canon Inc filed Critical Canon Inc
Priority to JP63092937A priority Critical patent/JPH01263668A/en
Publication of JPH01263668A publication Critical patent/JPH01263668A/en
Pending legal-status Critical Current

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  • Control Or Security For Electrophotography (AREA)

Abstract

PURPOSE:To make efficient the cooling in the main body of an equipment, and the elimination and resolution of ozone and to prevent image blurring caused by vibration by making a wind speed of an cooling equipment low during an image forming process and making it high after the image forming process. CONSTITUTION:In case of single copying, the wind speed of a fan 6 is medium in a stand-by state, low, during copying, thereby reducing the influence of vibration. At the same time when copying is finished, the wind speed is made high so as to discharge heat and ozone accumulated too much during copying. It is returned back to the medium speed in the stand-by state after specific time passes. On the other hand, in case of sequential copying, the high speed of the air cooling equipment and the low speed of it are alternated. Thus, functions opposite to each other can be satisfied by one air cooling equipment. Cooling in a machine, ozone elimination and ozone resolution can be quite efficiently achieved. Furthermore, the wind speed of the fanning means which is a vibration source can be lowered during the image forming process, whereby image blurring caused by vibration can be reduced and sharp image can be obtained.

Description

【発明の詳細な説明】 [産業上の利用分野] 本発明は複写機およびマイクロリーダープリンター等の
画像形成装置に装備される送風装置に関するものである
DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a blower device installed in an image forming apparatus such as a copying machine and a microreader printer.

[従来の技術] 従来、画像形成装置に装備される送風装置は、大別して
下記(1) 、 (2) 、 (3)の機能を有してい
る。
[Prior Art] Conventionally, a blower device installed in an image forming apparatus has the following functions (1), (2), and (3).

(1)画像形成装置本体内の冷却 (2)画像形成用感光体表面からのオゾンの除去(3)
除去オゾンを分解しつつ画像形成装置本体外に排出する
(1) Cooling inside the image forming apparatus main body (2) Removal of ozone from the surface of the image forming photoreceptor (3)
The removed ozone is decomposed and discharged to the outside of the image forming apparatus main body.

一方、送風装置の風速と上記した機能(1)。On the other hand, the wind speed of the blower and the above-mentioned function (1).

(2) 、 (3)との関係は、上記(1) 、 (2
)の機能を満足させるには風速を増すことが効果的であ
り、また上記(3)の機能を満足させるには、オゾン分
解フィルターを通過する際に起る化学結合によりオゾン
を除去する関係上風速は遅い方が良い。
The relationship with (2) and (3) is the above (1) and (2
) In order to satisfy the function (3) above, it is effective to increase the wind speed, and in order to satisfy the function (3) above, ozone is removed by the chemical bonds that occur when passing through the ozone decomposition filter. The slower the wind speed, the better.

[発明が解決しようとする課題] ところで、上記(1) 、 (2)の機能を重視して、
ファンモータの回転数を高くし風速を大きくすると、フ
ァンのダイナミックバランスが悪い方向に作用し、画像
形成を行うための感光ドラム等の機器に振動が伝わり、
画質を著しく劣化させる画像ブレの原因となる他、オゾ
ンを分解するフィルターを大型化する必要が生じる。
[Problem to be solved by the invention] By the way, with emphasis on the functions (1) and (2) above,
If the rotation speed of the fan motor is increased and the wind speed is increased, the dynamic balance of the fan will be adversely affected, and vibrations will be transmitted to equipment such as photosensitive drums that perform image formation.
In addition to causing image blur that significantly degrades image quality, it also requires a larger filter to decompose ozone.

また、上記(3)の機能を重視し風速を下げれば画像形
成装置本体内の温度が上昇し、さらに感光ドラムの表面
からオゾンを十分に除去できず、画像が流れる画像流れ
現象を引き起こす。
Furthermore, if the function (3) is emphasized and the wind speed is lowered, the temperature inside the image forming apparatus body increases, and ozone cannot be sufficiently removed from the surface of the photosensitive drum, resulting in image deletion.

そこで、従来は風速を大きくすると効果があるという要
求と、風速を小さくすると効果があるという要求の相反
する要求の双方をできるだけ満足させる風速を試行錯誤
して見つけ出し、その風速でファンを駆動するようにし
ていたが、相反する双方の要求に対して妥協した風速で
あることから上記した(1) 、 (2) 、 (3)
の機能を全て満足できるものであるとは言えなかった。
Therefore, conventional methods have been used to find, through trial and error, a wind speed that satisfies the contradictory requirements of increasing the wind speed to be more effective and reducing the wind speed to be more effective, and to drive the fan at that wind speed. However, since the wind speed was a compromise between the conflicting demands of both parties, the above-mentioned (1), (2), and (3)
It could not be said that all the functions of the system could be satisfied.

本発明の目的は、画像形成装置本体内の冷却、オゾンの
除去、オゾン分解を効率よく行うことができ、画像形成
時における振動影響も低減できる画像形成装置の送風装
置を提供するものである。
An object of the present invention is to provide an air blower for an image forming apparatus that can efficiently cool the inside of the image forming apparatus, remove ozone, and decompose ozone, and can also reduce the effects of vibration during image formation.

[課題を解決するための手段] 本発明の目的を達成するための要旨は、画像形成装置内
の空気を循環排気する送風手段を風速可変可能とすると
共に、画像形成装置の動作状態に応じて該送風手段の風
速を制御手段により制御する画像形成装置の送風装置で
あって、該制御手段は、画像形成工程中において低風速
に制御すると共に、画像形成工程終了後高風速に制御し
、画像形成が引ぎ続いて選択されていないとその後次の
画像形成が開始されるまで高風速と低風速との間で風速
を制御することを特徴とする画像形成装置の送風装置に
ある。
[Means for Solving the Problems] The gist of the present invention is to make the air blowing means for circulating and exhausting the air in the image forming apparatus variable in wind speed, and to adjust the speed according to the operating state of the image forming apparatus. An air blowing device for an image forming apparatus in which the air speed of the air blowing device is controlled by a control means, the control means controlling the air speed to a low air speed during the image forming process, and controlling the air speed to a high air speed after the end of the image forming process, so as to control the air speed of the air blowing device to A blower device for an image forming apparatus is characterized in that if formation is not selected subsequently, the wind speed is controlled between a high wind speed and a low wind speed until the next image formation is started.

[作用] 上記した構成の画像形成装置の送風装置は、画像形成工
程中は送風手段を低風速として、画像形成時に生ずるオ
ゾンの分解をオゾンフィルター等により高効率に行える
ようにするとともに、画像形成に対する振動の影響を極
力少なくし、画像形成工程終了後は送風手段を高風速と
して画像形成装置本体内の冷却と、画像形成のための機
器周辺のオゾンの除去を迅速に行うことができる。
[Function] The air blower of the image forming apparatus configured as described above uses a blower at a low air speed during the image forming process so that ozone generated during image formation can be decomposed with high efficiency using an ozone filter, etc. After the image forming process is completed, the blowing means is set at high air speed to cool the inside of the image forming apparatus and to quickly remove ozone around the image forming apparatus.

[実施例] 第2図は本発明による送風装置の一実施例を適用した複
写機の概略断面図を示す。1は感光ドラム、2は結像レ
ンズ、3は一次帯電器、4は定着ユニット、5はオゾン
フィルター、6は送風機で、不図示の送風機制御装置に
より風速が高速(Hi ) 、中速(M)、低速(Lo
)の3段階に調整される。7は前露光ランプをそれぞれ
表わす。
[Embodiment] FIG. 2 shows a schematic sectional view of a copying machine to which an embodiment of the blower device according to the present invention is applied. 1 is a photosensitive drum, 2 is an imaging lens, 3 is a primary charger, 4 is a fixing unit, 5 is an ozone filter, and 6 is a blower, and a blower control device (not shown) controls the wind speed from high speed (Hi) to medium speed (M ), low speed (Lo
) is adjusted in three stages. 7 each represent a pre-exposure lamp.

・印による流線は熱に関する気流を表わす。・The streamlines marked represent airflow related to heat.

熱の発生源は定着ユニット4および前露光ランプ7等で
あり、送風機6はそれらの熱に影響される感光ドラムま
わりや機内を冷却する。またQ印による流線はオゾンの
流れを表わし、発生源は主に一次帯電器3である。
The sources of heat are the fixing unit 4, the pre-exposure lamp 7, etc., and the blower 6 cools the area around the photosensitive drum and inside the machine, which are affected by the heat. The streamlines marked with Q represent the flow of ozone, and the source of the ozone is mainly the primary charger 3.

一次帯電器3より感光ドラム1に向はコロナ放電する際
に起こる化学反応でオゾンが発生し、熱気流と同じく送
風機6によって感光ドラム1まわりから除去される。
Ozone is generated by a chemical reaction that occurs during corona discharge from the primary charger 3 toward the photosensitive drum 1, and is removed from around the photosensitive drum 1 by the blower 6 in the same way as the hot air flow.

上記より、熱とオゾンは送風機6の排気容量が大きいほ
ど効率がよくなる事がわかる。しかし実際には送風機6
の設置空間にも限度があり、吸気断面積が等しければ流
速が速いほど排気量が増えるため、効率アップのために
は風速を上げなければならないが、化学反応でオゾンを
分解していたオゾンフィルター5はフィルター内をオゾ
ンが通過する間に分解しきれなくなる。そのためオゾン
フィルターの目を細かくしたり、厚みを増す、するとま
た圧力損失が増え排気容量が減ってしまうという悪循環
をくりかえし、既述した如くどこかで妥協しなければな
らないのが現状であった。
From the above, it can be seen that the efficiency of heat and ozone becomes higher as the exhaust capacity of the blower 6 becomes larger. However, in reality, the blower 6
There is a limit to the installation space for ozone filters, and if the intake cross-sectional area is the same, the faster the flow velocity, the greater the exhaust volume.In order to increase efficiency, the air velocity must be increased, but ozone filters that decompose ozone through chemical reactions 5 becomes unable to be completely decomposed while ozone passes through the filter. Therefore, if the mesh size of the ozone filter is made finer or the thickness is increased, the pressure loss increases again and the exhaust capacity decreases, repeating the vicious cycle, and as mentioned above, the current situation is that a compromise has to be made somewhere.

本実施例は前記送風機制御装置により送風機6の回転速
度を第1図に示す制御シーケンスに従って制御し、装置
本体内の冷却、オゾンの除去、オゾン分解の夫々の機能
を高効率に行なっている。
In this embodiment, the rotational speed of the blower 6 is controlled by the blower control device according to the control sequence shown in FIG. 1, and the functions of cooling the inside of the apparatus body, removing ozone, and decomposing ozone are performed with high efficiency.

第1図において、横軸を時間とし、パラメータにコピ操
作、オゾン発生量、送風機回転速度、機内の残存オゾン
量、フィルターのオゾン分解効率、機外へ排出されるオ
ゾン量を示している。
In FIG. 1, the horizontal axis is time, and parameters include copy operation, amount of ozone generated, fan rotation speed, amount of ozone remaining in the machine, ozone decomposition efficiency of the filter, and amount of ozone discharged to the outside of the machine.

シングルコピーの場合に、コピー動作のための信号が送
風機制御装置に何も人力されていない時期状態では、送
風機6の風速をM(中速)、コピー中はLo(低速)と
して振動の影響を低減し、またコピー終了と同時にHi
(高速)としてコピー中にたまりすぎた熱とオゾンを排
出し、一定時間後に時期状態のM(中速)に戻す。一方
、連続コピーの場合には最後の時期状態がなく、Hiと
LOを繰り返す。
In the case of single copying, when no signal for copying operation is manually input to the blower control device, the wind speed of the blower 6 is set to M (medium speed), and during copying, the wind speed is set to Lo (low speed) to reduce the influence of vibration. and goes high at the same time as copying is completed.
(high speed) to discharge excess heat and ozone accumulated during copying, and return to the timing state of M (medium speed) after a certain period of time. On the other hand, in the case of continuous copying, there is no final timing state, and Hi and LO are repeated.

すなわち、1コピーサイクル中において、−成帯電器3
等より発生するオゾンは、時間に対して一定であるため
機内の残存オゾン量は増加する。しかしその間送風機6
0回転速度は低速(LO)になって風速が小さいため、
オゾンフィルター5のオゾン分解効率は高く、排気され
るオゾン量は少ない。
That is, during one copy cycle, the negative charger 3
Since the amount of ozone generated by these factors remains constant over time, the amount of ozone remaining inside the aircraft increases. However, during that time the blower 6
Since 0 rotation speed is low speed (LO) and the wind speed is small,
The ozone filter 5 has a high ozone decomposition efficiency, and the amount of ozone exhausted is small.

そしてコピー終了後−時的に送風機6は高速(Hi)に
なり風速が最大となって機内で過剰になった熱とオゾン
を一気に放出する。ただし風速が速くなりフィルターの
オゾン分解効率がおちるため機外へ出ていくオゾンも増
えることも考えられるが、同時に放出される熱のためオ
ゾン自身が分解する傾向にある。その後機内の残存オゾ
ン量が規定内におさまるころに又時期状態の回転速度(
中速)にもどる。以下この繰り返しとなる。なお、最終
的に分解しきれず排出されるオゾンは100%除去する
ことはできないが、第1図に示す排出オゾン量−時間の
関係で表わされる最大値と単位時間当りの総排出量が安
全基準を満たす様に、送風機6の回転速度とその時間間
隔を適切に設定することでフレキシブルなコントロール
が可能となる。
After the copying is completed, the blower 6 temporarily becomes high speed (Hi) and the wind speed reaches its maximum, releasing excess heat and ozone inside the machine at once. However, as the wind speed increases, the ozone decomposition efficiency of the filter decreases, so it is possible that more ozone escapes from the aircraft, but at the same time, the ozone itself tends to decompose due to the heat released. Afterwards, when the amount of residual ozone inside the machine falls within the specified range, the rotational speed (
Return to medium speed). This process is repeated from here on. Although it is not possible to remove 100% of the ozone that is ultimately emitted due to incomplete decomposition, the maximum value and the total amount of ozone emitted per unit time shown in Figure 1 are the safety standards. Flexible control is possible by appropriately setting the rotational speed of the blower 6 and its time interval so as to satisfy the following conditions.

[発明の効果コ 以上説明してきたように、本発明によれば、1つの送風
手段で相反する機能を満足し、機内冷却、オゾン除去、
オゾン分解をそれぞれ高効率に実現できる。
[Effects of the Invention] As explained above, according to the present invention, contradictory functions can be satisfied with one air blowing means, and the functions of internal cooling, ozone removal,
Ozone decomposition can be achieved with high efficiency.

ざらに加振源である送風手段の風速を画像形成工程中に
低くできるため、振動による画像ブレが低減できシャー
プな画像が得られる。また画像形成工程中の振動を気に
しなくてもよく。
Since the wind speed of the air blowing means, which is the vibration source, can be lowered during the image forming process, image blur caused by vibration can be reduced and sharp images can be obtained. Furthermore, there is no need to worry about vibrations during the image forming process.

例えば翼径の小さな送風ファンであっても高回転速度で
風量をかせげ、画像形成装置の小型化に寄与することが
できる。
For example, even a blower fan with a small blade diameter can increase the air volume at a high rotation speed and contribute to downsizing of the image forming apparatus.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明による送風装置における送風機の回転
速度シーケンスの一実施例を示す図、第2図は、本発明
による送風装置の一実施例を装備した複写の概略断面図
。 1・・・感光ドラム、   2・・・結像レンズ、3・
・・−成帯電器、  4・・・定着ユニット、5・・・
オゾン分解フィルター− 6・・・送風機、     7・・・前露光ランプ。
FIG. 1 is a diagram showing an embodiment of the rotational speed sequence of a blower in a blower according to the present invention, and FIG. 2 is a schematic cross-sectional view of a copy equipped with an embodiment of the blower according to the present invention. 1... Photosensitive drum, 2... Imaging lens, 3...
...-charger, 4... fixing unit, 5...
Ozone decomposition filter - 6...Blower, 7...Pre-exposure lamp.

Claims (1)

【特許請求の範囲】[Claims] 1 画像形成装置内の空気を循環排気する送風手段を風
速可変可能とすると共に、画像形成装置の動作状態に応
じて該送風手段の風速を制御手段により制御する画像形
成装置の送風装置であって、該制御手段は、画像形成工
程中において低風速に制御すると共に、画像形成工程終
了後高風速に制御し、画像形成が引き続いて選択されて
いないとその後次の画像形成が開始されるまで高風速と
低風速との間で風速を制御することを特徴とする画像形
成装置の送風装置。
1. A blower device for an image forming apparatus, in which a blower means for circulating and exhausting air within the image forming apparatus is variable in speed, and the speed of the blower is controlled by a control means in accordance with the operating state of the image forming apparatus. The control means controls the wind speed to a low speed during the image forming process and to a high wind speed after the image forming process is completed, and if image formation is not selected continuously, the control means controls the wind speed to a high speed until the next image formation is started. A blower device for an image forming apparatus, characterized in that the wind speed is controlled between a wind speed and a low wind speed.
JP63092937A 1988-04-15 1988-04-15 Fan for image forming device Pending JPH01263668A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP63092937A JPH01263668A (en) 1988-04-15 1988-04-15 Fan for image forming device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP63092937A JPH01263668A (en) 1988-04-15 1988-04-15 Fan for image forming device

Publications (1)

Publication Number Publication Date
JPH01263668A true JPH01263668A (en) 1989-10-20

Family

ID=14068392

Family Applications (1)

Application Number Title Priority Date Filing Date
JP63092937A Pending JPH01263668A (en) 1988-04-15 1988-04-15 Fan for image forming device

Country Status (1)

Country Link
JP (1) JPH01263668A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100452549B1 (en) * 2002-06-28 2004-10-14 삼성전자주식회사 printer, and method for driving cooling-fan of printer
US6847795B2 (en) * 2002-05-24 2005-01-25 Brother Kogyo Kabushiki Kaisha Image forming apparatus
US7248811B2 (en) 2004-04-27 2007-07-24 Samsung Electronics Co., Ltd. Oxidation catalyst unit, a controlling method thereof, and a wet-type electrophotographic image forming apparatus comprising the oxidation catalyst unit

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6847795B2 (en) * 2002-05-24 2005-01-25 Brother Kogyo Kabushiki Kaisha Image forming apparatus
KR100452549B1 (en) * 2002-06-28 2004-10-14 삼성전자주식회사 printer, and method for driving cooling-fan of printer
US7248811B2 (en) 2004-04-27 2007-07-24 Samsung Electronics Co., Ltd. Oxidation catalyst unit, a controlling method thereof, and a wet-type electrophotographic image forming apparatus comprising the oxidation catalyst unit

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