CN1612033A

CN1612033A - filter

Info

Publication number: CN1612033A
Application number: CN 200310102988
Authority: CN
Inventors: 魏宏任; 徐子桓; 吕圣章
Original assignee: BenQ Corp
Current assignee: BenQ Corp
Priority date: 2003-10-31
Filing date: 2003-10-31
Publication date: 2005-05-04

Abstract

A filter device is used in a projector. The above-mentioned filter equipment includes: a first rotating shaft, a second rotating shaft parallel to the first rotating shaft and keeping a distance, a filter screen surrounding the first rotating shaft and the second rotating shaft and capable of rolling along with the rotation of the first rotating shaft and the second rotating shaft, a brush shaft having a plurality of bristles and arranged to make the bristles contact with the filter screen; a transmission device which enables the brush shaft to be connected with the second rotating shaft to rotate together, and a motor which is connected with the second rotating shaft and drives the second rotating shaft to rotate.

Description

Filtration unit

Technical field

The present invention relates to a kind of filtration unit, particularly relate to and a kind ofly utilize hairbrush contact filter screen and remove the filtration unit of the dust on the filter screen automatically.

Background technology

Under relatively poor air quality, if dust deposit in projector inside, can cause the damage of internal electrical components and projecting camera light bulb, so add upper filter screen to filter dust at air outlet.Traditional filtration unit only is used for blocks dust and the place of dust deposit is provided, but that dust has deposited on filter screen is many, can influence the filtering efficiency of filter screen, also can influence air output and then the influence heat radiation to intraware and bulb.The cleaning mode of this outer leaching net also can the remote effect filter screen filtration, and then influence the usefulness of projector.

Summary of the invention

In view of this, when the objective of the invention is to the start of each projector, filtration unit is rotated once, filter screen is contacted with a hairbrush and dust brushed and drop on the collection tray.

In order to reach above-mentioned purpose, filtration unit of the present invention comprises one first rotating shaft; One second rotating shaft and first shaft parallel also keep a distance; One filter screen in first rotating shaft and second rotating shaft, and can be followed the rotation of first rotating shaft and second rotating shaft and scrolling; One brush axle has many bristles and is arranged to make bristle to be contacted with filter screen; One gearing makes brush axle be connected in second rotating shaft and rotates together; And a motor, be connected to second rotating shaft and drive second rotating shaft and rotate.

Filtration unit of the present invention also comprises a collection tray and a dust blowing device, and above-mentioned collection tray is arranged at the below of filter screen, and above-mentioned dust blowing device contacts with bristle on the brush axle, and strikes off dust accompanying in the bristle thus.

In the filtration unit of the present invention, the dust blowing device is fixed on the collection tray.

In the filtration unit of the present invention, brush axle is positioned at the opposition side with projector's air supply direction with respect to filter screen.

In the filtration unit of the present invention, brush axle is identical with the second rotating shaft rotation direction.

In the filtration unit of the present invention, brush axle is adjacent to the second rotating shaft setting.

By above-mentioned device, when the starting of each projector, make filter screen rotate a circle, and contact and rotate with filter screen by brush axle, the dust that is attached on the filter screen is brushed, on collection tray, so because once cleaning is all done to filter screen by each projector that starts, the state of projector air-supply can keep stable, can make the heat radiation of system keep certain state, and can avoid dust accretions and cause the problem of dust pollution inside.

Description of drawings

Fig. 1 is the stereographic map of filtration unit of the present invention;

Fig. 2 is installed on the synoptic diagram of projector for filtration unit of the present invention.

Embodiment

As shown in Figure 1, one filter screen 6 is around between first rotating shaft 2 and second rotating shaft 4, can follow the rotation of first rotating shaft 2 and second rotating shaft 4 and scrolling, brush axle 8 connects with second rotating shaft 4 by gearing (being a driving-belt in the present embodiment) 12 and can rotate.Have many bristles 10 on the brush axle 8 and be contacted with filter screen 6, dust on the filter screen 6 brush can be fallen within the collection tray 16 of below, in addition brush axle 8 near be provided with a dust blowing device 14, the bristle 10 of brush axle contacts with this dust blowing device 14, when brush axle 8 rotated, fine dust accompanying on the bristle 10 can scrape to collection tray 16 by dust blowing device 14, when dust accumulation when a certain amount of, collection tray 16 can be taken out, dust is wherein outwelled.

As shown in Figure 2, the place ahead of filter screen 6 is the fan 20 of projector 100, get back to Fig. 1, A is the air supply direction of projector, when projector (not shown) starts, motor 18 can drive second rotating shaft 4 and rotate, because filter screen 6 is around first rotating shaft 2 and second rotating shaft 4, so filter screen 6 can be by second rotating shaft, 4 drives around first, second rotating shaft 2,4 scrollings, and brush axle 8 is arranged near second rotating shaft 4, and be connected to second rotating shaft 4 by driving-belt 12, also rotate together along with second rotating shaft 4 and rotation direction identical, this moment, bristle 10 brushed the dust on the filter screen 6, and the dust that brushes falls within on the collection tray 16, was attached to fine dust on the bristle 10 and can be contacted with dust blowing device 14 by bristle and scrapes in collection tray 16.

By above-mentioned device, when the starting of each projector, make filter screen 6 rotate a circle, and contact and rotate with filter screen 6 by brush axle 8, the dust that is attached on the filter screen 6 is brushed, on collection tray 16, so because once cleaning is all done to filter screen 6 by each projector that starts, the state of projector air-supply can keep stable, so that the heat radiation of system keeps certain state, and can avoid dust accretions and causes the problem of dust pollution inside.

Though disclosed the present invention in conjunction with above preferred embodiment; yet it is not in order to limiting the present invention, anyly is familiar with this operator, without departing from the spirit and scope of the present invention; some change and retouching of Ying Kezuo, so protection scope of the present invention should be with being as the criterion that claim was defined.

Claims

1. A filtering device comprising:

a first rotating shaft;

a second rotating shaft spaced a predetermined distance from the first rotating shaft;

A filter screen is used to filter impurities, the filter screen surrounds the first rotating shaft and the second rotating shaft, and can be rolled along with the rotation of the first rotating shaft and the second rotating shaft; and

A brush, the brush is in contact with the filter screen.

2. The filter device as claimed in claim 1, further comprising a transmission device, arranged between the brush and the second shaft, so that the brush is connected to the second shaft, and together with the second shaft turn.

3. The filtering device as claimed in claim 2, further comprising a driving device connected to any one of the following devices: the first rotating shaft, the second rotating shaft or the brush.

4. The filtering device as claimed in claim 3, wherein the driving device is connected to the second rotating shaft and drives the second rotating shaft to rotate; when the second rotating shaft rotates, it will drive the filter screen to roll and pass through The transmission device drives the brush to rotate, so that the brush brushes off impurities attached to the filter net.

5. The filter device as claimed in claim 3, wherein the driving device is connected to the first rotating shaft and drives the first rotating shaft to rotate; when the first rotating shaft rotates, it will drive the filter screen to scroll and simultaneously drive The second rotating shaft rotates, and drives the brush to rotate through the transmission device, so that the brush brushes off impurities attached to the filter net.

6. The filter device as claimed in claim 3, wherein the driving device is connected to the brush and drives the brush to rotate; when the brush rotates, the transmission device drives the second rotating shaft to rotate to drive the brush The filter screen is rolled to make the brush brush off the impurities attached to the filter screen.

7. The filter device as claimed in claim 1, further comprising a dust collecting pan disposed under the filter screen.

8. The filtering device as claimed in claim 7, further comprising a dust scraper contacting the brush, thereby scraping off impurities attached to the brush.

9. The filter device as claimed in claim 8, wherein the dust scraper is fixed on the dust collecting pan.

10. A method for automatically cleaning the filter screen, which is suitable for a filter device, the filter device has a filter screen and a brush, and the brush tool is used to brush away impurities on the filter screen, the method comprising the following steps:

(a) rotate the screen;

(b) touch the screen with the brush; and

(c) Use the brush to scrape the filter screen.

11. The method for automatically cleaning the filter according to claim 10, wherein said step (c) further comprises a step (d) of rotating the brush.

12. The method for automatically cleaning the filter screen as claimed in claim 11, in the above-mentioned step (d), further comprising a step (e) connecting the filter screen and the brush, so that the filter screen and the brush are relatively moved .

13. The method for automatically cleaning the filter screen as claimed in claim 12, wherein the above-mentioned filter device further comprises a first rotating shaft and a second rotating shaft, the filter screen surrounds the first rotating shaft and the second rotating shaft, when the When the first rotating shaft or the second rotating shaft rotates, it will drive the filter screen to scroll; and in the above step (e), it also includes a step (f) to install a linkage device between the brush and any of the following devices Between: between the first rotating shaft or the second rotating shaft, used to connect the filter net and the brush, so that the filter net and the brush move relative to each other.

14. The method for automatically cleaning the filter screen as claimed in claim 11, in its above-mentioned step (d), further comprising the following steps:

(g) a dust collecting pan is arranged under the brush;

(h) providing a dust scraper on the pan; and

(i) Make the brush tool contact the dust scraper; when the brush tool rotates, the brush tool touches the dust scraper so that impurities on the brush tool fall onto the dust collecting pan.