JP2016057556A - Projection type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a projection type image display device that prevents reduction in cooling efficiency due to clogging of a filter, and allows a filter change or the frequency of cleaning to be largely reduced.SOLUTION: In a projection type image display device comprising a fan for cooling inside a casing and a filter unit that has a filter unit provided in an opening portion for taking in outside air in the casing, the filter unit comprises: a dust-proof filter; dust peeling means that causes the dust adhered to the dust-proof filter to be peeled off; an air blower that blows a wind along the dust-proof filter; and a wind guide member for letting the wind flow by the air blower. The wind guide member is arranged movably along the dust-proof filter, and the dust peeling means causes the wind guide member to move as causing the dust adhered to the dust-proof filter to be peeled off, and letting the wind flow from the air blower discharges the dust.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a projection type image display apparatus, and more particularly to a projection type image display apparatus that takes in outside air and cools the inside of a housing.

  Conventionally, a projection type image display apparatus has been provided with a fan for air-cooling the light source and the light modulation means, and in order to prevent dust contained in the air taken into the enclosure by the fan from entering the enclosure. A dustproof filter is provided. When the dust filter is clogged, the cooling efficiency decreases, so maintenance such as regular replacement and cleaning of the dust filter has been required. However, in recent years, dust attached to the dust filter has been cleaned to improve maintenance. The structure which reduces the frequency | count of replacement | exchange of a dustproof filter by providing a mechanism is employ | adopted.

  In Patent Document 1, in a projection-type image display apparatus including a plurality of types of dust removal filters and a vibration applying unit that applies vibration to the dust removal filters, the dust removal filter is vibrated by the vibration applying unit. Techniques have been disclosed for dropping attached dust and reducing the number of filter replacements.

  In Patent Document 2, an indoor unit of an air conditioner including a cleaning unit that is movably disposed on the surface of an air filter, and an exhaust unit that is appropriately connected to the cleaning unit and discharges dust collected in the cleaning unit to the outside of the machine. Discloses a technique for discharging dust housed in a dust housing section in the cleaning unit together with air blown from the exhaust fan when the cleaning unit and the exhaust unit are connected to each other.

JP 2010-197575 A JP 2008-32351 A

  However, in the prior art disclosed in Patent Document 1 described above, since the dust is not treated by vibrating the dustproof filter, the dust accumulates in the apparatus. For this reason, there is a risk that the dust may reattach to the dustproof filter and cause clogging, or it may be necessary to clean the inside of the unit.

  Further, in the prior art disclosed in Patent Document 2 described above, dust collected in the cleaning unit leaks out of the cleaning unit before being discharged out of the apparatus by the exhaust unit, and is reattached to the dustproof filter and clogged. There is a risk of causing work or cleaning the inside of the unit.

  Accordingly, an object of the present invention is to prevent the cooling efficiency from being reduced due to clogging of the filter, and to prevent the dust removed from the filter from reattaching to the filter, thereby greatly reducing the number of filter replacements and cleanings. It is an object of the present invention to provide a projection type image display apparatus that enables the above.

  In order to achieve the above object, the present invention provides a projection-type image display device comprising a fan for cooling the inside of a housing and a filter unit provided in an opening for taking outside air into the housing. The unit includes a dustproof filter, dust peeling means for peeling dust adhering to the dustproof filter, a blower for allowing wind to flow along the dustproof filter, and a wind guide member for passing the wind through the blower. The wind guide member is movably disposed along the dust filter, and the dust guide means moves the wind guide member while removing dust attached to the dust filter, and at the same time, the wind blows from the blower. This is characterized by discharging dust.

  According to the present invention, in the projection type display device, the dust removing means removes dust adhering to the dustproof filter and suppresses clogging of the filter, so that the number of filter replacement operations is greatly reduced while maintaining good cooling efficiency. It is possible to make it. In addition, the dust that has been peeled off is immediately discharged from the filter unit by a blower, so that the re-attachment of dust to the filter and the accumulation of dust on the filter unit are suppressed. It is possible to provide a projection-type image display device that can

1 is an overall perspective view of a projection type image display apparatus according to an embodiment of the present invention. Schematic plan view of a projection type image display device according to an embodiment of the present invention The perspective view of the filter unit which concerns on 1st Embodiment in this invention. Sectional view along line AA in FIG. Sectional view along line BB in FIG. The perspective view of the filter unit which concerns on 2nd Embodiment in this invention. Sectional view along the AA line of FIG. Sectional view along line BB in FIG.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

<< First Embodiment >>
FIG. 1 is an overall perspective view of a projection type image display apparatus according to an embodiment of the present invention, and FIG. 2 is a schematic plan view of the projection type image display apparatus according to an embodiment of the present invention. The overall configuration of the projection type image display apparatus according to the first embodiment of the present invention will be described below with reference to FIGS. In FIG. 1, 1 is a projection type image display device, 2 is a projection lens, and 3 is an air inlet for introducing outside air into the device. In FIG. 2, 4 is a light source lamp, 5 is an optical engine having light modulation means such as a liquid crystal panel that modulates a light beam emitted from the light source into an image, 6 is an exhaust fan, 7 is an exhaust port, and 8 is the proposal. It is a filter unit.

  Since the light source lamp 4 and the optical engine 5 are very hot, the exhaust fan 6 is operated to cool the light source lamp 4 and the optical engine 5 and the cooling air 20 is introduced from the intake port 3. After passing through the filter unit 8, the cooling air 20 is guided to the light source lamp 4 and the optical engine 5 to cool it. Cooling air 20 that has been cooled and raised in temperature is discharged from the exhaust port 7 to the outside of the apparatus by the exhaust fan 6.

  Next, the filter unit according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 3 is a perspective view of the filter unit according to the first embodiment of the present invention. 4 and 5 are sectional views of the filter unit (a sectional view taken along the line AA in FIG. 3 and a sectional view taken along the line BB).

  In FIG. 3, the filter unit 8 includes a dustproof filter 10, a wind guide member 11, a blower 12, a telescopic duct 13 that connects the wind guide member and the blower, a piezoelectric element 14 that is a dust peeling means, And a windproof member 15. Further, the wind guide member 11 and the windproof member 15 include moving means (not shown) that is movable along the dustproof filter 10.

  In FIG. 4, the cooling air 20 introduced from the air inlet 3 passes from the outer surface to the inner surface of the dust filter 10 and is guided to the cooled part inside the apparatus. On the other hand, the air 21 from the blower 12 passes through the duct 13 and is guided to the air guide member 11. The air 21 flows along the surface of the dustproof filter 10 without passing through the dustproof filter 10 because of the windproof member 15, and is discharged from the end of the wind guide member 11 to the outside of the filter unit 8.

  In FIG. 5, 22 is dust in the air, and the dust 22 is guided from the air inlet 3 to the apparatus and adheres to the outer surface of the dust filter 10. By vibrating the dust-proof filter 10 by the piezoelectric element 14, the dust 22 can be separated from the dust-proof filter 10, but is reattached to the dust-proof filter 10 by the cooling air 20 sucked from the air inlet 3. However, the dust 22 in a range where the cooling air 20 is prevented by the air guide member 11 is separated from the dust filter 10 and rises into the air guide member 11. The dust 20 rising in the air guide member 11 is discharged out of the filter unit 8 from the end of the air guide member 11 by the air 21 guided from the blower 12 to the air guide member 11.

  Since the wind guide member 11 and the windproof member 15 can be moved along the dustproof filter by a moving means (not shown), the wind guide member 11 and the windproof member 15 are attached to the entire surface of the dustproof filter by moving the wind guide member 11 and the windproof member 15 while separating the dust. Dust can be peeled off.

  Thus, it becomes possible to suppress that dust adheres to a dust-proof filter again by setting it as the structure discharged | emitted from a filter unit with an air blower immediately after peeling the dust adhering to a dust-proof filter.

  In addition, the dust that has been peeled off is immediately discharged from the filter unit by a blower, so that the re-attachment of dust to the filter and the accumulation of dust on the filter unit are suppressed. Is possible.

  According to the projection-type image display device equipped with the filter unit having the above-described configuration, the dust removal means removes dust adhering to the dustproof filter and suppresses clogging of the filter. The number of operations can be greatly reduced. In addition, since the separated dust is immediately discharged from the filter unit by the blower, it is possible to suppress the reattachment of the dust to the filter, and thus it is possible to efficiently maintain a good cooling efficiency. Can be provided.

<< Second Embodiment >>
Hereinafter, a filter unit according to a second embodiment of the present invention will be described with reference to FIGS. FIG. 6 is a perspective view of a filter unit according to the second embodiment of the present invention. 7 and 8 are principle views of the filter unit (a cross-sectional view taken along line AA in FIG. 6 and a cross-sectional view taken along line BB). In this embodiment, the same numbers as those in the first embodiment are given the same numbers.

  In FIG. 6, a second dust filter 16 capable of collecting finer dust than the dust filter 10 and a filter capable of collecting finer dust than the dust filter 10 having a sufficient dust capacity. A dust accommodating portion 17, a duct 18 that can be expanded and contracted to connect the air guide member 11 and the dust accommodating portion 17, and a rotating body 19 that is swingable within the windbreak member 15.

  In FIG. 7, the cooling air 20 sucked from the air inlet 3 passes from the outer surface to the inner surface of the dust-proof filter 10 and then passes from the outer surface to the inner surface of the second dust-proof filter 16. Led to.

  On the other hand, the air 21 from the blower 12 passes through the duct 13 and is guided to the air guide member 11. The air 21 flows along the surface of the dust-proof filter 10 without passing through the dust-proof filter 10 because of the wind-proof member 15, passes through the duct 18 from the end of the wind guide member 11, and is discharged to the dust container 17.

  In FIG. 8, 22 is dust in the air, and the dust 22 is guided from the air inlet 3 to the apparatus and adheres to the outer surface of the dust filter 10. By disposing the second dust-proof filter 16 on the downstream side of the flow of cooling air from the dust-proof filter 10, fine dust passing through the dust-proof filter 10 can be collected, so that more dust is collected. I can do it.

  The rotating body 19 is swung until it hits the dustproof filter 10 as shown in the swinging direction 23 shown in FIG. 8 to give an impact to the dustproof filter 10 and adhere to the periphery of the portion of the dustproof filter 10 where the shock is applied. The dust 22 is peeled off. The separated dust 22 rises into the air guide member 11 and is discharged from the end of the air guide member 11 through the duct 18 by the air 21 from the blower 12 to the dust container 17.

  Since the wind guide member 11 and the wind shield member 15 can be moved along the dust filter by a moving means (not shown), the dust guide filter can be moved by moving the wind guide member 11 and the wind shield member 15 while swinging the rotating body 19. Dust adhering to the entire surface can be peeled off.

  The dust 22 separated from the dust filter 10 is discharged to the dust container 17 by the air 21 from the blower 12, thereby suppressing the dust 22 from returning into the dust filter 10 and the air guide member 11.

  The peeled-off dust is immediately discharged from the filter unit to the dust container by the blower, so that the reattachment of dust to the dustproof filter is suppressed, and the dust leaks into the device to store the dust in the dust container. Can be suppressed. Therefore, it is possible to greatly reduce the number of times the dustproof filter is replaced and the inside of the apparatus is cleaned. Further, if the dust container can be attached to and detached from the filter unit, even if dust accumulates in the dust container, it can be easily cleaned and replaced, so that the usability can be further improved.

  According to the projection type image display apparatus equipped with the filter unit having the above-described configuration, the dust attached to the dust-proof filter is peeled off by the rotating body to suppress clogging of the dust-proof filter. The number of replacement operations can be greatly reduced.

  In addition, since the separated dust is immediately discharged from the filter unit by the blower, it is possible to suppress the reattachment of the dust to the filter, and thus it is possible to efficiently maintain a good cooling efficiency. Can be provided.

  As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment, A various deformation | transformation and change are possible within the range of the summary.

1 projection type image display device, 2 projection lens, 3 air inlet, 4 light source lamp,
5 Optical engine, 6 Exhaust fan, 7 Exhaust port, 8 Filter unit,
10 dustproof filter, 11 air guide member, 12 blower, 13 duct,
14 piezoelectric elements, 15 windproof member, 16 second dust filter, 17 dust container,
18 Duct, 19 Rotating body, 20 Cooling air, 21 Air flowing from the blower,
22 Dust, 23 Rotating direction of rotating body

Claims (5)

A fan for cooling the inside of the housing,
A filter unit provided in an opening for taking outside air into the housing;
In a projection type image display device comprising:
The filter unit is
A dust filter,
Dust peeling means for peeling dust adhering to the dust filter;
A blower for flowing wind along the dust filter;
An air guide member for passing air by the blower;
With
The air guide member is arranged to be movable along the dust filter,
A projection type image display apparatus, wherein the dust guide is moved while the dust adhering means is peeled off the dust adhering to the dust filter, and the dust is discharged by flowing air from the blower. A windproof member disposed on the inner side of the housing than the wind guide member;
The windproof member is arranged to be movable along the dustproof filter,
The projection type image display device according to claim 1, wherein the wind guide member and the windproof member are arranged so as to sandwich the dustproof filter. A dust container is provided to store the discharged dust.
The projection type image display device according to claim 1, wherein an end portion of the air guide member is connected to the dust container.   The projection type image display device according to claim 2, wherein the dust peeling means is disposed on the windproof member.   The projection type image display apparatus according to claim 1, wherein the dust peeling unit is a vibration applying unit.