Imaging system with cleaning of fine particle collection device

Patent metadata

Field	Value
Publication number	US-11921459-B2
Application number	US-202117908656-A
Country	US
Kind code	B2
Filing date	Jan 27, 2021
Priority date	Mar 6, 2020
Publication date	Mar 5, 2024
Grant date	Mar 5, 2024

Abstract

An imaging system includes a housing to define a housing space, a collection device to collect fine particles in the housing space, a detection device to detect a collection performance of the collection device, and a cleaning device to clean the collection device.

First claim

The invention claimed is:

1. An imaging system comprising:
a housing to define a housing space;
a collection device to collect fine particles in the housing space, wherein the collection device includes a charging device and a filter downstream of the charging device in a direction of an air flow passage that directs a portion of the fine particles to collect as a soiling on the charging device;
a detection device to detect a collection performance of the collection device based in part on a measurement of the soiling on the charging device; and
a cleaning device to clean the collection device based on the collection performance.

2. The imaging system according to claim 1 ,
wherein the collection device includes the charging device to charge the fine particles and the filter to collect the fine particles having been charged, wherein the fine particles collected form a soiling on the filter, and
wherein the detection device includes a filter soiling measurement device to measure the soiling on the filter and to detect the collection performance based on the soiling measured.

3. The imaging system according to claim 2 ,
wherein the filter soiling measurement device includes an optical sensor to detect light reflected from the filter so as to measure the soiling based on the light reflected.

4. The imaging system according to claim 3 ,
wherein the charging device and the filter are aligned along the air flow passage to carry the fine particles to the filter, and
wherein the optical sensor is adjacent the air flow passage.

5. The imaging system according to claim 4 ,
wherein the filter includes a detection surface located in the air flow passage, and
the optical sensor to detect light reflected from the detection surface.

6. The imaging system according to claim 5 ,
wherein the filter includes a recess that extends in a direction of the air flow passage, and
wherein the detection surface is in the recess.

7. The imaging system according to claim 5 ,
wherein the filter includes a main body and a protrusion that extends from the main body to form the detection surface.

8. The imaging system according to claim 2 ,
wherein the cleaning device includes a filter cleaning device to impart a vibration to the filter of the collection device.

9. The imaging system according to claim 2 ,
wherein the cleaning device includes a charging-device cleaning device to impart a vibration to the charging device of the collection device.

10. The imaging system according to claim 1 , further comprising a charging-device soiling measurement device,
wherein the charging device comprises electric characteristics that are variable in accordance with the soiling formed, and
the charging-device soiling measurement device to measure the electric characteristics of the charging device, to detect the soiling formed on the charging device.

11. The imaging system according to claim 1 , comprising:
a cleaning controller to compare the collection performance detected with a threshold performance, and to cause the cleaning device to operate when the collection performance is less than the threshold performance.

12. The imaging system according to claim 1 , comprising:
a fixing device; and
a print controller to:
compare the collection performance detected with a threshold performance, and
reduce a highest temperature of the fixing device when the collection performance detected is less than the threshold performance.

13. The imaging system according to claim 1 , comprising:
a first air flow passage including the collection device which is a first collection device;
a second air flow passage including a second collection device; and
a switching device to selectively switch between the first air flow passage and the second air flow passage, to form a selected air flow passage which communicates an inside of the housing with an outside of the housing,
the switching device to switch to the second air flow passage, as the selected air flow passage, when the first air flow passage is set as the selected air flow passage and the collection performance of the first collection device is less than a threshold performance.

14. An imaging system comprising:
a housing to define a housing space;
a second collection device including a second filter coupled to a second air flow passage;
a switching device to selectively switch between the first air flow passage and the second air flow passage to form a selected air flow passage which communicates an inside of the housing with an outside of the housing, wherein the switching device is to switch to the second air flow passage when a collection performance of the first collection device is less than a threshold performance; and
a cleaning device to clean the first collection device.

15. An imaging system comprising:
a housing to define a housing space;
a collection device to collect fine particles in the housing space, the collection device including a charging device to charge the fine particles and a filter to collect the fine particles having been charged, wherein the fine particles collected form a soiling on the filter;
a fixing device; and
a print controller to:
compare a detected collection performance of the filter with a threshold performance for the filter; and
reduce a highest temperature of the fixing device when the detected collection performance is less than the threshold performance.

16. The imaging system according to claim 15 , further comprising:
a detection device to detect a collection performance of the collection device.

17. The imaging system according to claim 16 , comprising a cleaning device to clean the collection device:
wherein the cleaning device to clean the collection device based on the collection performance detected, and
the detection device includes a filter soiling measurement device to measure the soiling on the filter and to detect the collection performance based on the soiling measured.

Assignees

• Hewlett Packard Development Co

Inventors

• Aoshima Yuji
• Nakazawa Takashi
• Ito Takuya

Classifications

• G03G21/206 Primary

  Conducting air through the machine, e.g. for cooling, filtering, removing gases like ozone · CPC title

• B01D24/4615

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• B01D24/4673

  using rotary devices or vibration mechanisms, e.g. stirrers · CPC title

• B01D29/6415

  with a rotary movement with respect to the filtering element · CPC title

• B01D35/20

  Vibrating the filters (regenerating filter material by vibrations in filters with stationary filtering elements B01D29/72; discharging the filter cake by vibrations in filters with moving filtering elements B01D33/54, B01D33/76) · CPC title