JP6443083B2 - Dust collector and projector - Google Patents

Description

  The present invention relates to a dust collecting member and a projector.

  2. Description of the Related Art Conventionally, there is known a projector that modulates light emitted from a light source device to form an image according to image information, and enlarges and projects the image on a projection surface such as a screen. Such a projector often uses a light source device including a light source lamp such as an ultra-high pressure mercury lamp and a housing in which the light source lamp is housed.

  Here, the light source lamp may rupture due to aging or the like. In this case, it is necessary to replace the light source device, but it is also necessary to prevent fragments of the light source lamp from being scattered outside. For this reason, a light source device is known in which a mesh is provided in each of an inlet for introducing cooling air into the housing and an outlet for discharging cooling air outside the housing (see, for example, Patent Document 1).

JP 2013-117742 A

Here, relatively large fragments of the light source lamp are prevented from being scattered outside the housing by the mesh. However, relatively small fragments (dust) may pass through the mesh due to the explosion pressure when the light source lamp is ruptured. In order to prevent such fragments from scattering outside the projector when the light source device is replaced, it is conceivable to make the mesh mesh finer.
However, if the mesh is made finer, the resistance when air passes through the mesh is increased, so that the efficiency of discharging the air that has cooled the light source lamp is reduced, and consequently the cooling efficiency of the light source lamp is reduced. There's a problem.
In particular, in recent projectors, a light source lamp with high emission luminance is often employed, and accordingly, the temperature of the light source lamp during lighting is higher than before. For this reason, the problem due to the decrease in cooling efficiency becomes significant.

  An object of the present invention is to solve at least a part of the above problems, and a dust collecting member capable of suppressing scattering of fragments of a light source lamp at the time of rupture while suppressing a decrease in cooling efficiency of the light source lamp, and One of the purposes is to provide a projector.

  A dust collecting member according to a first aspect of the present invention is used by being incorporated in a projector including a light source device having a light source lamp and a light source housing that houses the light source lamp, and flows into the light source housing. A dust collecting member that collects dust from the air, an inlet that introduces air that has flowed out from the outlet of the light source casing; a branching portion that branches the air introduced from the inlet; and the flow A first duct portion extending from the branch portion along a first direction orthogonal to the opening surface connecting the edges of the outlet, and through which air introduced from the inlet through the branch portion can be circulated; A second duct portion extending from the branch portion along a second direction intersecting the first direction and allowing air introduced from the inlet through the branch portion to flow, The first duct part forms the first duct part. A plurality of side walls, a first opening formed on at least one of the plurality of side walls, and allowing the air flowing through the first duct to flow outside the first duct, and the first opening And the second duct part has a second opening for circulating the air flowing through the second duct part to the outside of the second duct part.

According to the said 1st aspect, the air which flowed out from the outflow port of the housing | casing for light sources is introduce | transduced in a dust collection member from an inlet.
Here, in a state other than when the light source lamp is ruptured (a state where the light source lamp is not ruptured or a state after the light source lamp is ruptured), the exhaust pressure from the outlet is not relatively high. For this reason, the air which cooled the light source lamp can be discharged | emitted outside the dust collection member by attracting | sucking the air which distribute | circulated the 2nd duct part with the fan etc., for example.

On the other hand, when the light source lamp is ruptured, air containing dust such as fragments of the light source lamp flows into the dust collecting member from the outlet. At this time, since the exhaust pressure from the outlet is relatively high due to the explosion pressure generated by the burst of the light source lamp, the air introduced into the dust collecting member flows in the first direction orthogonal to the opening surface of the outlet. And it flows in into a 1st duct part from a branch part. Since the first opening is formed in at least one of the plurality of side walls constituting the first duct portion, the air that has flowed into the first duct portion passes through the first opening. It is discharged outside the duct part. When the air passes through the first opening, the dust is captured by the mesh covering the first opening. Thereby, since the said dust is stopped in the 1st duct part, scattering of the dust (fragment of a light source lamp) to the exterior of a dust collection member is suppressed.
Therefore, even when another mesh is provided at the outlet, it is possible to prevent fine fragments of the light source lamp from scattering outside the dust collecting member without making the mesh of the other mesh finer. The scattering of the fragments can be suppressed without reducing the cooling efficiency.

In the first aspect, the first opening is formed in a side wall portion substantially orthogonal to the first direction among a plurality of side wall portions forming the first duct portion, and circulates through the first duct portion. It is preferable that the air is discharged outside the dust collecting member along the first direction.
The state substantially orthogonal to the first direction includes a state orthogonal to the first direction and a state slightly inclined from the state orthogonal to the first direction.
Here, due to the explosion pressure generated when the light source lamp bursts, the air in the light source casing, that is, the air containing the dust, passes through the outlet of the light source casing, the inlet of the dust collecting member, and the branch portion. It is easy to flow into the first duct portion extending in the first direction. The first opening portion of the first duct portion is formed in a side wall portion substantially orthogonal to the first direction, and air flowing through the first duct portion is disposed outside the dust collecting member along the first direction. Discharge. According to this, since the air which distribute | circulates a 1st duct part can be rapidly discharged | emitted from a 1st opening part, it can suppress backflow by the air which distribute | circulates the said 1st duct part being sprayed on a side wall part. Therefore, it can suppress that the air containing dust flows to the 2nd duct part side, and can suppress that the said dust is discharged | emitted outside the dust collection member.

In the first aspect, it is preferable that the first opening is formed in a slit shape, and the mesh is located on a side opposite to the first direction with respect to the first opening.
Here, when light from the light source lamp leaks to the outside from the outlet, if the first opening is formed on substantially the entire surface of the side wall perpendicular to the first direction, the leaked light is in the first direction. And may leak out of the dust collecting member through the first opening.
On the other hand, according to the said 1st aspect, the opening area of the said 1st opening part can be made small because the 1st opening part is formed in slit shape. Therefore, even when the light leaks to the outside of the light source casing through the outlet, the light can be prevented from leaking to the outside of the dust collecting member.
The mesh is located on the opposite side to the first direction with respect to the first opening, that is, on the upstream side in the flow direction of the air passing through the first opening. According to this, compared with the case where the said mesh is located in the downstream, the captured dust can be made easy to retain in the 1st duct part. Therefore, it is possible to reliably suppress the dust including the fragments of the light source lamp from being discharged to the outside of the dust collecting member.

In the first aspect, it is preferable that the mesh is disposed at a position substantially orthogonal to the first direction.
According to the first aspect, since the air that includes the dust and is discharged from the outlet along the first direction when the light source lamp is ruptured can reliably pass through the mesh, The dust can be easily captured. Accordingly, it is possible to further suppress the fragments of the light source lamp from being discharged to the outside of the first duct portion and, consequently, the dust collecting member.

In the first aspect, after the first duct portion extends in the first direction, the first duct portion extends along the second direction, and the first opening portion includes a plurality of the first duct portion. It is preferable that the side wall portion is formed on the side wall portion located on the second direction side, and the mesh is disposed at a position substantially orthogonal to the second direction.
According to the first aspect, the air discharged in the first direction from the outlet by the explosion pressure generated by the burst of the light source lamp flows in the first direction through the first duct portion, and then in the first direction. It circulates in the 2nd direction which intersects perpendicularly. And the air which passed through the 1st opening and the mesh which were formed in the side wall part located in the 2nd direction side in the 1st duct part, and circulated through the 1st duct part is the 1st duct part. It is discharged outside.
According to this, the shape of the terminal-side first duct part in the air flow path that circulates through the first duct part is made into a bag path shape, so that the dust captured by the mesh is collected in the first duct part. It can be easy to fasten. Therefore, it is possible to reliably suppress the dust including the fragments of the light source lamp from being discharged to the outside of the dust collecting member.

In the first aspect, there is an aggregation part that aggregates the air that has passed through the mesh through the first duct part and the air that has passed through the second duct part, and the aggregation part is introduced into the first aspect. It is preferable to have an exhaust port for discharging the air to the outside of the dust collecting member.
According to the said 1st aspect, the air which distribute | circulated the 1st duct part and the air which distribute | circulated the 2nd duct part can be collected and discharged | emitted from an exhaust port. Therefore, the air discharged from the dust collecting member is introduced as compared with the case where the air flowing through the first duct portion and the air flowing through the second duct portion are discharged from different parts of the dust collecting member. The structure of the duct etc. which can be simplified can be simplified.
In addition, when another mesh is provided at the exhaust port, even if the dust captured by the mesh moves to the second duct part side when the dust collecting member is moved, the dust is exhausted. Scattering from the mouth to the outside of the dust collecting member can be suppressed by the other mesh.

A projector according to a second aspect of the present invention includes an exterior casing that constitutes an exterior, a light source device, a light modulation device that modulates light emitted from the light source device, and light modulated by the light modulation device. A projection optical device for projecting; and the dust collecting member, wherein the light source device houses a light source lamp, the light source lamp, and an outlet through which air that has cooled the light source lamp flows out. And the dust collecting member is detachably attached to a position in the exterior housing where air discharged from the outlet is introduced into the interior through the inlet.
According to the said 2nd aspect, there can exist an effect similar to the dust collection member which concerns on the said 1st aspect. Further, since the dust collecting member is detachably attached at a position in the outer casing, the dust collecting member can be exchanged together with the light source device when the light source lamp is ruptured. Can be kept clean.

In the second aspect, a duct and a fan respectively disposed in the exterior casing are provided, the exterior casing has a casing-side exhaust port that exhausts internal air, and the duct includes the dust collecting member It is preferable that the housing side exhaust port is connected, and the fan is disposed in the duct and discharges the air flowing through the dust collecting member from the housing side exhaust port to the outside of the exterior housing.
According to the second aspect, the fan in the duct connecting the dust collecting member and the housing side exhaust port is driven, so that the air in the light source housing (for example, the air that has cooled the light source lamp) can be sucked. The air can be discharged to the outside of the exterior casing through the casing-side exhaust port. Therefore, the cooling efficiency of the light source lamp can be improved.

1 is a perspective view showing a projector according to a first embodiment. The top view which shows the apparatus main body in the said 1st Embodiment. FIG. 2 is a schematic diagram showing a configuration of an image forming apparatus in the first embodiment. The perspective view which looked at the light source device in the said 1st Embodiment from the light-projection side. The side view which shows the light source device in the said 1st Embodiment. The figure which shows the positional relationship of the image forming apparatus, power supply device, and duct in the said 1st Embodiment. The perspective view which shows the duct in the said 1st Embodiment. The perspective view which shows the duct in the said 1st Embodiment. The figure which shows the flow path of the air discharged | emitted from the light source device in the said 1st Embodiment. The figure which shows the deformation | transformation of the duct in the said 1st Embodiment. The figure which shows the light source device with which the projector which concerns on 2nd Embodiment is provided, a power supply device, and a duct. The figure which shows the deformation | transformation of the duct in the said 2nd Embodiment. FIG. 10 is a schematic diagram illustrating an internal configuration of a projector according to a third embodiment. The figure which shows the positional relationship of the light source device in the said 3rd Embodiment, a power supply device, a dust collection member, and a duct. The figure which shows the flow path of the air which flows out out of the light source device in the said 3rd Embodiment. The figure which shows the deformation | transformation of the duct in the said 3rd Embodiment. Sectional drawing which shows the light source device in 4th Embodiment, a power supply device, a dust collection member, and a duct. The figure which shows the flow path of the air which flows out out of the light source device in the said 4th Embodiment. The figure which shows the deformation | transformation of the duct in the said 4th Embodiment. Sectional drawing which shows the light source device in 5th Embodiment, a power supply device, a dust collection member, and a duct. The figure which shows the deformation | transformation of the duct in the said 5th Embodiment.

[First Embodiment]
Hereinafter, a first embodiment will be described based on the drawings.
[Schematic configuration of projector]
FIG. 1 is a perspective view showing an external appearance of a projector 1 according to the present embodiment. FIG. 2 is a diagram showing the inside of the projector 1. In FIG. 2, a part of the apparatus main body 3 included in the projector 1 is not shown.
The projector 1 according to the present embodiment modulates light emitted from a light source device housed therein to form an image according to image information, and enlarges and projects the image on a projection surface such as a screen. As shown in FIGS. 1 and 2, the projector 1 includes an exterior housing 2 (FIGS. 1 and 2) constituting an exterior, and an apparatus main body 3 (FIG. 2) housed in the exterior housing 2. .

[Configuration of exterior casing]
As shown in FIG. 1, the exterior housing 2 has an overall substantially rectangular parallelepiped shape, and is formed of a synthetic resin in the present embodiment. The exterior casing 2 includes an upper case 21, a lower case 22, a front case 23, and a rear case 24, and these are combined.
The upper case 21 constitutes the top surface portion 2A of the outer casing 2 and a part of each of the left side surface portion 2E and the right side surface portion 2F. The lower case 22 constitutes a bottom surface portion 2B of the exterior housing 2 and a part of each of the left side surface portion 2E and the right side surface portion 2F. The front case 23 and the rear case 24 constitute a front part 2C and a back part 2D of the exterior housing 2, respectively.

A lamp cover 2A1 that covers the arrangement position of the light source device 41 (FIG. 2) accommodated therein is detachably attached to the top surface portion 2A. By removing the lamp cover 2A1, the light source device 41 is exposed, whereby the light source device 41 can be replaced.
The front portion 2C is formed with a substantially semicircular opening 2C1 through which an image projected from a projection optical device 46 described later passes.
The right side surface portion 2F is formed with an air inlet 2F1 through which external air is sucked and introduced into the exterior housing 2 by a cooling device 6 (FIG. 2) described later.
As shown in FIG. 2, the left side surface portion 2 </ b> E is formed with an exhaust port 2 </ b> E <b> 1 that circulates through the exterior housing 2 and discharges air that has been cooled for cooling. A duct 7 described later is connected to the exhaust port 2E1.

[Device configuration]
The apparatus main body 3 corresponds to the internal configuration of the projector 1, and includes an image forming apparatus 4, a power supply apparatus 5, and a cooling apparatus 6, as shown in FIG. Although not shown, the apparatus main body 3 includes a control device for controlling the operation of the entire projector 1 in addition to these.

[Configuration of Image Forming Apparatus]
FIG. 3 is a schematic diagram illustrating the configuration of the image forming apparatus 4.
The image forming apparatus 4 forms and projects an image according to image information under the control of the control device. As shown in FIG. 3, the image forming apparatus 4 includes a light source device 41, an illumination optical device 42, a color separation device 43, a relay device 44, an electro-optical device 45, a projection optical device 46, and optical components that support them. And a housing 47.

The light source device 41 emits a light beam to the illumination optical device 42. The light source device 41 includes a light source lamp 411, a reflector 412 and a collimating lens 413, and a housing 414 that accommodates them. The housing 414 will be described in detail later.
The illumination optical device 42 equalizes the illuminance in the plane orthogonal to the central axis of the light beam emitted from the light source device 41. The illumination optical device 42 includes a first lens array 421, a light control device 422, a second lens array 423, a polarization conversion element 424, and a superimposing lens 425 in the order of incidence of light from the light source device 41.

The color separation device 43 separates the light beam incident from the illumination optical device 42 into three color lights of red (R), green (G), and blue (B). The color separation device 43 includes dichroic mirrors 431 and 432 and a reflection mirror 433.
The relay device 44 is provided on an optical path of red light having a longer optical path than other color lights among the three separated color lights. The relay device 44 includes an incident side lens 441, a relay lens 443, and reflection mirrors 442 and 444.

The electro-optical device 45 modulates the separated color lights according to the image information, and then synthesizes the color lights. The electro-optical device 45 includes a field lens 451 provided for each color light, an incident-side polarizing plate 452, and a liquid crystal panel 453 as a light modulation device (red, green, and blue liquid crystal panels are 453R, 453G, and 453B, respectively). ) And the output side polarizing plate 454, and a cross dichroic prism 455 as a color synthesizing optical device that synthesizes each modulated color light to form a projected image.
The projection optical device 46 enlarges and projects the formed projection image on the projection surface. The projection optical device 46 is configured as a combined lens including a plurality of lenses (not shown) and a lens barrel 461 that accommodates the plurality of lenses therein.

  Although not shown in detail, the optical component casing 47 includes a component storage member that stores various optical components, a lid-like member that closes a component storage opening formed in the component storage member, and projection optics. A support member that supports the device 46. An illumination optical axis Ax is set in the optical component casing 47, and the devices 41 to 46 are arranged at predetermined positions with respect to the illumination optical axis Ax. For this reason, when the light source device 41 is disposed in the optical component casing 47, the central axis of the light emitted from the light source device 41 coincides with the illumination optical axis Ax.

[Configuration of power supply unit]
Returning to FIG. 2, the power supply device 5 is disposed at the approximate center in the exterior housing 2. Specifically, the power supply device 5 includes both end portions of the image forming apparatus 4 configured in a substantially L shape along the back surface portion 2D and along the right side surface portion 2F (end portions on the side opposite to the light emitting side in the light source device 41). , And the projection direction side end portion of the projection optical device 46). Although not shown in detail, the power supply device 5 includes an AC / DC conversion circuit, a voltage conversion circuit, and a lighting control circuit.
The AC / DC converter circuit converts a commercial alternating current input to an inlet connector disposed on the back surface portion 2D into a direct current. The voltage conversion circuit boosts and steps down the converted direct current according to the supplied electronic component. The lighting control circuit generates an AC rectangular wave current from the converted DC current, supplies the current to the light source device 41, and turns on the light source device 41. Among these, the lighting control circuit is controlled by the control device.

[Configuration of cooling device]
The cooling device 6 circulates the cooling air introduced from the outside of the exterior housing 2 to the cooling object constituting the apparatus main body 3 to cool the cooling object. The cooling device 6 includes fans 61 to 64 and ducts 65 and 7.
The fans 61 and 62 are composed of centrifugal fans (sirocco fans), and are arranged between the projection optical device 46 and the right side surface portion 2F with the intake surface facing the intake port 2F1. These fans 61 and 62 suck the air outside the exterior casing 2 through the intake port 2F1 and introduce it into the exterior casing 2. Then, the fans 61 and 62 send the sucked air to the vicinity of the liquid crystal panels 453 and the emission-side polarizing plate 454 through the duct 65 to cool them.
The fan 63 is a centrifugal fan and is disposed in the vicinity of the light source device 41. The fan 63 sucks the air in the exterior housing 2 and sends it out to the light source device 41, thereby cooling the light source lamp 411.

The duct 7 is formed in a substantially L shape in plan view, and is disposed at a position on the left side surface portion 2E side in the exterior housing 2. Specifically, the duct 7 has one end portion disposed between the light source device 41 and the power supply device 5, and the other end portion disposed between the left side surface portion 2 </ b> E and the power supply device 5. The duct 7 introduces air that has cooled the light source device 41, the illumination optical device 42, and the power supply device 5, and air that has circulated through the exterior housing 2. The duct 7 will be described in detail later.
The fan 64 is an axial fan. The fan 64 is disposed in the duct 7 and discharges the air flowing through the duct 7 to the outside of the exterior housing 2 through the exhaust port 2E1.

[Housing configuration]
FIG. 4 is a perspective view of the light source device 41 as viewed from the light emitting side, and FIG. 5 is a side view of the light source device 41 as viewed from the left side surface portion 414E side.
Here, the housing 414 constituting the light source device 41 will be described.
As shown in FIGS. 4 and 5, the housing 414 includes a main body 415 (FIGS. 4 and 5) and a duct member 416 (FIG. 4). These are combined to form the top surface portion 414A, the bottom surface portion 414B, the front surface portion 414C, the back surface portion 414D, the left side surface portion 414E, and the right side surface portion 414F of the housing 414.

The main body 415 is formed of a synthetic resin containing a glass filler, has a storage space S (see FIG. 6) in which the light source lamp 411 and the reflector 412 are stored, and a collimating lens 413 is attached. In other words, the storage space S is a space formed by the inner surface of the main body 415 and the inner surface of the reflector 412, and is a space in which the light source lamp 411 is disposed.
Although not shown in the drawing, the right side surface of the main body 415 is formed with inlets for introducing air into the main body 415 at positions on the top surface 414A side and the bottom surface 414B side. And the duct member 416 is attached to the said right side surface part so that these inlets may be covered.

Exhaust ports 4151 and 4152 are formed in the left side surface portion of the main body portion 415 constituting the left side surface portion 414E.
The exhaust port 4151 discharges the air introduced into the main body 415 and cooling the light source lamp 411 to the outside of the housing 414. The exhaust port 4151 is formed in a substantially rectangular shape, and a mesh 4153 is disposed inside the exhaust port 4151 to suppress the scattering of relatively large fragments to the outside when the light source lamp 411 is ruptured. Has been.
The exhaust port 4152 circulates on the back surface (surface opposite to the light emitting side) of the reflector 412 and discharges the air that has cooled the reflector 412 to the outside of the housing 414.

The duct member 416 has an introduction port 4161 that opens to the front portion 414C side, and the introduction port 4161 is connected to the discharge port of the fan 63. In this inlet 4161, a mesh 4162 that suppresses the scattering of fragments when the light source lamp 411 is ruptured is disposed.
In addition, although not shown in the figure, a flow that moves in the vertical direction by its own weight in the duct member 416 and causes air introduced into the duct member 416 through the inlet 4161 to flow upward in the vertical direction. A path switching member is provided.

In such a housing 414, the flow direction of the air introduced into the duct member 416 is changed upward in the vertical direction by moving the flow path switching member according to the posture of the light source device 41. This air is introduced into the main body 415 through the inlet located in the vertical direction among the inlets formed in the right side surface portion of the main body 415, and is blown from above to the light source lamp 411. Thereby, the light source lamp 411 is effectively cooled.
Thereafter, air used for cooling the light source lamp 411 (hereinafter referred to as light source cooling air) is discharged out of the housing 414 through the exhaust port 4151 and flows into the duct 7 facing the exhaust port 4151. The

[Duct structure]
FIG. 6 is a diagram illustrating a positional relationship between the image forming apparatus 4 and the power supply apparatus 5 and the duct 7.
In the following description, the Z direction indicates the emission direction of light from the light source device 41, and the X direction and the Y direction indicate directions orthogonal to the Z direction and orthogonal to each other. In the present embodiment, when the projector 1 is placed on the placement surface with the bottom surface portion 2B facing the placement surface and the Z direction is along the horizontal direction (installed in the normal placement posture). The Y direction refers to the direction from the bottom surface portion 2B to the top surface portion 2A (the direction from the bottom to the top), and the X direction refers to the direction from the back surface portion 2D to the front surface portion 2C (right as viewed from the Z direction). To the left).
The duct 7 introduces air that has cooled the image forming apparatus 4, the power supply device 5, and the like into the interior, and causes the fan 64 provided therein to exhaust the air to the outside of the exterior housing 2 through the exhaust port 2 </ b> E <b> 1. As shown in FIG. 6, the duct 7 includes a substantially L-shaped introduction portion 71 that faces the light source device 41, the illumination optical device 42, and the power supply device 5, an arrangement portion 73 that is connected to the introduction portion 71, and Have

FIG. 7 is a perspective view of the duct 7 as seen from the side opposite to the Z direction, and FIG. 8 is a perspective view of the duct 7 as seen from the Z direction side.
As shown in FIGS. 7 and 8, such a duct 7 includes a duct body 7S located on the opposite side to the Y direction, a lid-like member 7T located on the Y direction side with respect to the duct body 7S, Is provided. And these are combined and the duct 7 is comprised and the introduction part 71 and the arrangement | positioning part 73 in which air distribute | circulates are comprised.

[Configuration of introduction section]
As shown in FIG. 6, the introduction unit 71 faces each of the image forming apparatus 4 and the power supply apparatus 5 and introduces air that has cooled them into the interior. The introduction part 71 includes introduction ports 711 to 715, a branch part 716, and duct parts 717 to 720.

The introduction port 711 is formed on the surface of the introduction portion 71 that faces the left side surface portion 414E of the light source device 41 so as to face the exhaust port 4151. The area of the substantially rectangular opening surface (virtual surface connecting the edges forming the opening) of the introduction port 711 is larger than the opening surface 4151A of the exhaust port 4151, and the air discharged from the exhaust port 4151 has a larger area. Almost all are configured to flow into the introduction portion 71 via the introduction port 711.
The branch portion 716 is located inside the introduction port 711 and communicates with duct portions 717 and 718 described later. Of the air introduced into the branch portion 716 via the inlet port 711, the air having a high exhaust pressure from the exhaust port 4151 flows into the duct portion 717 via the branch portion 716. Further, the air having a low exhaust pressure flows into the duct portion 718 via the branch portion 716 by the suction force of the fan 64 disposed in the disposition portion 73 described later.

Duct portion 717 corresponds to the first duct portion of the present invention. As shown in FIG. 6, the duct portion 717 is orthogonal to the opening surface 4151A of the exhaust port 4151 and is in a first direction A1 (X direction in the present embodiment) that is a direction from the exhaust port 4151 toward the introduction port 711. The duct portion extends from the branching portion 716 along the direction parallel to the direction of the head. The duct portion 717 is formed by side wall portions 7171 to 7174 (see the drawing for the side wall portion on the Y direction side) formed by the duct body 7S and the lid-like member 7T.
Among these side wall portions, in the side wall portion 7173 located on the first direction A1 side, a slit-like opening 7176 that is elongated in the Y direction is formed at the end of the side wall portion 7173 on the Z direction side.

  Further, in the duct portion 717, a metal mesh 7177 is fixed on the side opposite to the first direction A1 with respect to the opening portion 7176 so as to be orthogonal to the first direction A1. The mesh 7177 is formed in a plate shape, and has a function of capturing dust (for example, fragments of the light source lamp 411) contained in the air flowing in the duct portion 717 along the first direction A1. Since the dust captured by the mesh 7177 has a mass, it falls in the vertical direction (that is, the direction opposite to the Y direction) and remains in the duct portion 717.

  Of the side wall portions forming the duct portion 717, the side wall portion 7171 located on the Z direction side and along the XY plane forms the edge of the introduction port 711. The side wall portion 7171 has a direction in which the light source cooling air in the housing 414 is inclined with respect to the first direction A1 due to an explosion pressure when the light source lamp 411 is ruptured (a first direction A1 that is the same direction as the X direction). The light source cooling air is formed so as to be guided into the duct portion 717 even when it flows in the direction inclined to the Z direction side).

  The duct portion 718 corresponds to the second duct portion of the present invention, and communicates with the branch portion 716 together with the duct portion 717. The duct portion 718 is a branching portion along a second direction A2 that is a direction intersecting the first direction A1 (in this embodiment, a direction orthogonal to the first direction A1 and a direction opposite to the Z direction). A duct portion extending from 716. Such a duct portion 718 has a function of guiding the air flowing through the inside to the fan 64 arranged in the arrangement portion 73 described later. That is, when the fan 64 is driven, the air introduced into the branching portion 716 from the introduction port 711 flows into the duct portion 718 by the suction force of the fan 64, flows through the duct portion 718, and flows through the fan 64. Led to.

As shown in FIGS. 6 and 7, the introduction port 712 is formed in the vicinity of the end portion opposite to the Z direction on the surface of the introduction portion 71 facing the image forming apparatus 4. That is, the introduction port 712 is located on the side opposite to the Z direction from the introduction port 711. The introduction port 712 introduces air discharged from the exhaust port 4152 (see FIGS. 4 and 5), that is, air that has cooled the back side of the reflector 412 into the introduction unit 71.
The duct part 719 communicates with the duct part 718 and guides the air introduced through the introduction port 712 to the duct part 718.

The introduction port 713 is formed in a substantially rectangular shape near the end portion on the Z direction side on the surface of the introduction portion 71 facing the image forming apparatus 4. That is, the introduction port 713 is located on the Z direction side from the introduction port 711. The introduction port 713 introduces air into which the illumination optical device 42 (for example, the light control device 422 and the polarization conversion element 424) is cooled into the introduction unit 71.
As shown in FIGS. 7 and 8, the duct portion 720 includes a pair of communication portions 7201 and 7202 that sandwich the duct portion 717 from the Y direction side and the opposite side to the Y direction (the Y direction side communication portion is 7201, The communication portion opposite to the Y direction is 7202). These communication portions 7201 and 7202 guide the air introduced from the introduction port 713 to the duct portion 718.

The introduction ports 714 and 715 are formed in a portion along the X direction and facing the power supply device 5 in the introduction portion 71 formed in a substantially L shape.
As shown in FIG. 8, a plurality of introduction ports 714 are formed in a slit shape on the Y direction side, and the introduction ports 715 are formed in a substantially L shape on the end surface on the Z direction side. Air in the exterior housing 2 (for example, air that has cooled the power supply device 5) is introduced into the introduction portion 71 through the introduction ports 714 and 715.

[Configuration of placement section]
The placement unit 73 is connected to the introduction unit 71. Specifically, the arrangement portion 73 is formed so as to protrude from the portion along the X direction in the introduction portion 71 to the opposite side to the Z direction. The fan 64 is arranged in the arrangement portion 73. That is, the fan 64 is arranged in the duct 7 so that the air introduced from the introduction port 711 flows into the duct portion 718 from the branching portion 716 and the air flowing through the duct portion 718 can be sucked.
The arrangement portion 73 has a connection portion 731 that further protrudes in the direction opposite to the Z direction (that is, the direction in which air is discharged by the fan 64). As shown in FIG. 7, the connection portion 731 is formed in a substantially cylindrical shape, and is connected to the exhaust port 2E1 and the left side surface portion 2E.
By the fan 64 arranged in such an arrangement part 73, the air circulated in the duct part 718 and the air introduced into the inside through the introduction ports 714, 715 are sucked by the fan 64, The gas is discharged from the exhaust port 2E1 to the outside of the exterior casing 2 through the connection portion 731.

[Flow path of air introduced from the light source device in a state other than when the light source lamp bursts]
FIG. 9 is a view showing a flow path of air introduced from the light source device 41 into the duct 7. In FIG. 9, the air flow path in a state where the light source lamp 411 is not ruptured is indicated by a solid arrow L1, and the air flow path when the light source lamp 411 is ruptured is indicated by a one-dot chain line arrow L2. Is shown.
The light source cooling air in the housing 414 is introduced into the introduction part 71 (duct 7) through the introduction port 711 facing the exhaust port 4151.

Here, in a state where the light source lamp 411 is not ruptured, the light source cooling air is discharged from the exhaust port 4151 by convection in the housing 414, so that the exhaust pressure of the light source cooling air from the exhaust port 4151 is so high. Absent. For this reason, as indicated by the solid line arrow L1 in FIG. 9, the light source cooling air introduced into the introduction portion 71 from the exhaust port 4151 and the introduction port 711 is separated from the branch portion 716 by the suction force of the fan 64. It flows along the two directions A2 (the direction opposite to the Z direction), and thereby flows into the duct portion 718.
The light source cooling air flows through the duct portion 718 and is sucked by the fan 64, and is then discharged out of the exterior casing 2 through the exhaust port 2E1 connected to the connection portion 731.

[Flow path of air introduced from the light source device when the light source lamp bursts]
On the other hand, when the light source lamp 411 is ruptured, explosion pressure is generated by rupture in the housing 414 as described above. Therefore, the exhaust pressure of the light source cooling air from the exhaust port 4151 is ruptured by the light source lamp 411. It is higher than the exhaust pressure when it is not. Specifically, the exhaust pressure when the light source cooling air reaches the branch portion 716 is higher than the suction pressure by the fan 64 in the branch portion 716. For this reason, the air discharged from the exhaust port 4151 when the light source lamp 411 is ruptured is introduced into the introducing portion 71 via the introducing port 711 as shown by the one-dot chain line arrow L2 in FIG. From 716, it flows along the first direction A1 and flows into the duct portion 717.
The light source cooling air flows in the duct portion 717 along the first direction A1, passes through the mesh 7177, and is discharged to the outside of the duct 7 through the opening portion 7176.

Here, the light source cooling air discharged from the exhaust port 4151 when the light source lamp 411 is ruptured also includes dust that is a fragment of the light source lamp 411. This dust is captured by the mesh 7177 in the process in which the light source cooling air passes through the mesh 7177. Since such dust has a mass, it falls in the vertical direction after the explosion pressure is settled and stays in the duct portion 717.
On the other hand, after the explosion pressure is settled, as described above, the air introduced into the introducing portion 71 through the introducing port 711 flows into the duct portion 718 from the branching portion 716 due to the suction force of the fan 64. Is done. As described above, when the explosion pressure is not generated, it is difficult for air to flow through the duct portion 717. For this reason, the dust captured by the mesh 7177 tends to stay in the duct portion 717 and is not easily discharged out of the duct 7.

  Although illustration of the flow path is omitted in FIG. 9, even when the light source lamp 411 is not ruptured or ruptured, the air that has cooled the back side of the reflector 412 by the drive of the fan 64 is introduced into the inlet port. Air that has flowed into the duct portion 718 through the duct 712 and the duct portion 719 and has cooled the illumination optical device 42 flows into the duct portion 718 through the inlet 713 and the duct portion 720. The air flowing through the duct portion 718 is sucked by the fan 64 together with the air introduced into the introduction portion 71 through the introduction ports 714 and 715 (see FIG. 8) after cooling the power supply device 5 and is discharged to the exhaust port. 2E1 is discharged out of the outer casing 2.

[Effect of the first embodiment]
The projector 1 according to the present embodiment described above has the following effects.
As described above, in a state where the light source lamp 411 is not ruptured, the air discharged from the exhaust port 4151 by convection is introduced into the duct 7 from the introduction port 711 facing the exhaust port 4151. This air circulates in the duct portion 718 from the branch portion 716 due to the suction force of the fan 64, and is discharged by the fan 64 out of the duct 7 and eventually out of the exterior casing 2.

On the other hand, when the light source lamp 411 is ruptured, the light source cooling air including fragments (dust) of the light source lamp 411 is discharged from the exhaust port 4151 and is introduced into the duct 7 through the introduction port 711. Since the exhaust pressure of the air from the exhaust port 4151 is increased by the explosion pressure generated when the light source lamp 411 is ruptured, the air travels straight in the first direction A1 and passes through the branch portion 716. Into the part 717. Here, since the opening 7176 is formed in the side wall portion 7173 that forms the duct portion 717, the air that has flowed into the duct portion 717 passes through the opening portion 7176, and thus the duct 7. Discharged outside. When the air passes through the mesh 7177, the fragments included in the air are captured by the mesh 7177, and the scattering of the fragments is suppressed.
Therefore, since the scattering of fine fragments of the light source lamp 411 can be suppressed without making the mesh 4153 provided in the exhaust port 4151 fine, the fragments of the light source lamp 411 can be prevented without reducing the cooling efficiency of the light source device. Can be prevented from scattering.

In the projector 1, the light source device 41 is configured to be replaceable for reasons such as rupture and life of the light source lamp 411. Here, large fragments of the light source lamp 411 can be captured by the mesh 4153. However, if the light source device 41 is provided with a configuration capable of capturing even fine fragments, the light source device 41 tends to be expensive, and the above-described As such, the cooling efficiency of the light source lamp 411 may be reduced. Further, when such a configuration is provided in the light source device 41, the light source device 41 becomes complicated and large.
On the other hand, since the duct 7 has a configuration that suppresses the scattering of the fragments of the light source lamp 411, the configuration of the light source device 41 can be suppressed from being complicated and enlarged, and the light source device can be provided without reducing the cooling efficiency. 41 can be configured at low cost.

  The air flowing through the duct portion 717 is discharged out of the duct 7 through the opening 7176. According to this, the air does not stagnate in the duct portion 717 and is discharged from the opening 7176, so that the fragments of the light source lamp 411 carried from the light source device 41 and retained in the duct portion 717 are It is possible to suppress the suction by 64 and the discharge from the exterior housing 2. Even when very fine fragments pass through the mesh 7177 and the opening 7176 together with the air, the fragments are discharged to a position outside the duct 7 and a position inside the exterior housing 2. Therefore, even in this case, it is possible to suppress the fragments of the light source lamp 411 from being discharged out of the exterior housing 2.

  The mesh 7177 in the duct portion 717 is disposed at a position substantially orthogonal to the first direction A1. According to this, when the light source lamp 411 is ruptured, it can be configured such that the air containing the fragments and discharged from the exhaust port 4151 along the first direction A1 surely passes through the mesh 7177. Therefore, since the debris can be easily captured by the mesh 7177, it is possible to further suppress the debris from being discharged out of the exterior housing 2.

The opening portion 7176 is formed in a slit shape at the end portion on the Z direction side in the side wall portion 7173 substantially orthogonal to the first direction A1. According to this, even when light from the light source lamp 411 leaks from the exhaust port 4151 in the light source device 41, the light is out of the duct 7 as compared with the case where the opening 7176 is formed on the substantially entire surface of the side wall 7173. Leakage can be suppressed.
Further, the mesh 7177 is located on the opposite side to the first direction A1 with respect to the opening 7176, that is, on the upstream side in the air flow path passing through the opening 7176. According to this, compared with the case where the said mesh 7177 is located in a downstream, it can be made easy to hold | maintain the captured fragment in the duct 7. FIG. Therefore, it can suppress reliably that the said fragment | piece is discharged | emitted out of the duct 7. FIG.

[Modification of First Embodiment]
In the projector 1, the fan 64 is configured to discharge the air introduced into the duct 7 through the exhaust port 2 </ b> E <b> 1 formed in the left side surface part 2 </ b> E of the exterior housing 2. That is, in the projector 1, the fan 64 is arranged in the duct 7 so that the air suction direction and the discharge direction are along the direction opposite to the Z direction. However, instead of such a duct 7, a duct in which the fan 64 is arranged so that the air suction direction and the discharge direction are along the X direction may be adopted.

FIG. 10 is a view showing a duct 7 </ b> A that is a modification of the duct 7.
As shown in FIG. 10, the duct 7 </ b> A, which is a modification of the duct 7, has the same configuration and function as the duct 7 except that it has a placement portion 73 </ b> A instead of the placement portion 73.
The placement portion 73A is located at the end of the introduction portion 71 on the X direction side. In the arrangement portion 73A, a fan 64 constituted by an axial fan is arranged so that the air suction direction and the discharge direction are along the X direction.
The connection portion 731A of the arrangement portion 73A is formed so as to protrude on the discharge side of the fan 64 arranged in the arrangement portion 73A, that is, the X direction side with respect to the fan 64, and the connection portion 731A is , Connected to the inner surface of the front portion 2C.

When such a duct 7A is employed, the exterior casing 2 is employed in which the exhaust port 2E1 is not formed in the left side surface portion 2E and the exhaust port (not shown) is formed in the front surface portion 2C. . And connection part 731A is connected with the said exhaust port inside 2 C of front parts, and the exhaust air by the fan 64 is discharged | emitted out of the exterior housing | casing 2 from the front part 2C side.
Even with the projector 1 including such a duct 7 </ b> A, the same effects as those of the projector 1 including the duct 7 can be obtained.

[Second Embodiment]
Next, a second embodiment will be described.
The projector according to the present embodiment has the same configuration as that of the projector 1, but differs from the projector 1 in that the configuration of the duct portion through which air including fragments is circulated when the light source lamp 411 is ruptured. . In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 11 is a cross-sectional view in the XZ plane of a part of the image forming apparatus 4, the power supply device 5, and the duct 7 </ b> B provided in the projector 1 </ b> B according to the present embodiment. More specifically, FIG. 11 is a diagram showing a flow path of air flowing from the light source device 41 through the duct 7B.
The projector 1B according to the present embodiment has the same configuration and function as the projector 1 except that the duct 7B is provided instead of the duct 7, and the duct 7B includes an introduction portion 71B and an arrangement as shown in FIG. Part 73.

  Similarly to the introduction portion 71, the introduction portion 71B is configured in a substantially L shape having a portion along the Z direction and a portion along the X direction when viewed from the Y direction side. The introduction portion 71B has the same configuration and function as the introduction portion 71 except that the introduction portion 71B has a duct portion 717B that is different in shape and configuration from the duct portion 717. That is, the introduction part 71B has introduction ports 711 to 715, a branch part 716, duct parts 717B and 718 to 720.

The duct portion 717B is a duct portion that extends from the branch portion 716 along the first direction A1, similarly to the duct portion 717. Air that is discharged from the exhaust port 4151 in the first direction A1 when the light source lamp 411 is ruptured and introduced into the introduction unit 71B through the introduction port 711 flows through the duct unit 717B.
Like the duct part 717, such a duct part 717B includes a side wall part 7171 located on the Z direction side, a side wall part 7172 located on the opposite side to the Z direction, a side wall part 7173 located on the X direction side, Y It is surrounded by a side wall portion 7174 located on the opposite side to the direction and a side wall portion (not shown) located on the Y direction side.

Here, in the duct part 717B, the opening part 7176 is not formed in the side wall part 7173, and the opening part 7176 is formed in the side wall part 7172 located in the second direction A2. The opening 7176 allows the duct portion 717B and the duct portion 718 to communicate with each other. In the present embodiment, the opening 7176 is formed in a rectangular shape having a relatively large opening surface, but may be formed in a slit shape.
Further, the mesh 7177 is provided in the opening 7176. Note that the mesh 7177 may be provided so as to cover the opening 7176 on the Z direction side or on the opposite side to the Z direction.

[Flow path of air introduced from light source device]
When the light source lamp 411 is not ruptured, the light source cooling air discharged by convection from the exhaust port 4151 is introduced into the inlet port as shown by the solid line arrow L3 in FIG. 711 is introduced into the introducing portion 71B. Then, the light source cooling air flows into the duct portion 718 from the branch portion 716 along the second direction A2 by the suction force of the fan 64. The light source cooling air flows through the duct portion 718 and is sucked by the fan 64 and is discharged out of the exterior housing 2 through the connection portion 731 and the exhaust port 2E1.

  On the other hand, when the light source lamp 411 is ruptured, explosion pressure is generated in the housing 414 as described above. The exhaust pressure is higher than the exhaust pressure when the light source lamp 411 is not ruptured. For this reason, the air flows along the first direction A1 and is introduced into the introduction part 71B from the introduction port 711 as shown by a one-dot chain line arrow L4 in FIG. It flows into the duct portion 717B.

  The light source cooling air that has flowed into the duct portion 717B collides with the side wall portion 7173 that forms the duct portion 717B, and the pressure is weakened. The flow direction of the air is that of the fan 64 that acts via the opening portion 7176. The direction is changed along the second direction A2 by the suction force. The debris contained in the light source cooling air is captured by the mesh 7177 in the process of passing through the opening 7176, then falls in the vertical direction, and remains in the duct portion 717B. The air that has passed through the opening 7176 flows into the duct portion 718 and is sucked by the fan 64 in the same manner as described above. Thereby, it is suppressed that the said fragment is discharged | emitted out of the duct 7B.

  Although the flow path is not shown in FIG. 11, the air that has cooled the back side of the reflector 412 by driving the fan 64, regardless of whether the light source lamp 411 is ruptured, passes through the inlet 712 and the duct portion 719. The air that has flowed into the duct portion 718 and has cooled the light control device 422 and the polarization conversion element 424 flows into the duct portion 718 through the introduction port 713 and the duct portion 720. Furthermore, the air that has cooled the power supply device 5 flows into the introduction part 71B via the introduction ports 714 (not shown in FIG. 11) and 715, and merges with the air that circulates in the duct part 718. These airs are exhausted from the exhaust port 2E1 to the outside of the exterior casing 2 by the fan 64 in the same manner as described above.

[Effects of Second Embodiment]
According to the projector 1B according to the present embodiment described above, in addition to the same effects as the projector 1, the following effects can be achieved.
When the light source lamp 411 is not ruptured, the air discharged from the exhaust port 4151 flows through the duct portion 718 and is sucked by the fan 64.
On the other hand, when the light source lamp 411 is ruptured, the light source cooling air discharged from the exhaust port 4151 by the explosion pressure is captured by the mesh 7177 and then the duct portion through the opening 7176. It flows into a duct portion 718 communicating with 717.
According to this, when the light source lamp 411 is ruptured and when it is not ruptured, the air introduced into the duct 7B from the introduction port 711 finally flows through the duct portion 718. The air can be discharged out of the duct 7B by the fan 64. That is, the discharge direction of the air can be summarized. Therefore, the configuration of the duct 7B can be simplified as compared with the configuration in which the air flowing through the duct portion 717 and the air flowing through the duct portion 718 are discharged from different openings to the outside of the duct.

[Modification of Second Embodiment]
In the duct 7B, the fan 64 arranged in the arrangement portion 73 is arranged so that the air suction direction and the discharge direction are along the direction opposite to the Z direction. On the other hand, instead of the duct 7B, a duct in which the fan 64 is arranged so that the air suction direction and the discharge direction are along the X direction may be employed in the same manner as the duct 7A.

FIG. 12 is a cross-sectional view of the duct 7C, which is a modification of the duct 7B, a part of the image forming apparatus 4, and the power supply device 5 in the XZ plane.
As shown in FIG. 12, the duct 7C, which is a modification of the duct 7B, has the same configuration and function as the duct 7B, except that it has a placement portion 73A instead of the placement portion 73.
Like the arrangement part 73A in the duct 7A, the arrangement part 73A is located at the end of the introduction part 71B on the X direction side, and in the arrangement part 73A, the air suction direction and the discharge direction are in the X direction. A fan 64 composed of an axial fan is disposed along the fan.
Similar to the above, the arrangement portion 73A has a connection portion 731A that protrudes on the discharge side of the fan 64 arranged in the arrangement portion 73A, that is, the X direction side with respect to the fan 64, and the connection portion 731A. Is connected to the inner surface of the front portion 2C.

When such a duct 7C is employed, the fan 64 disposed in the placement portion 73A is adopted, as described above, using the exterior housing 2 having an exhaust port (not shown) formed in the front portion 2C. The discharged air is discharged out of the exterior housing 2 from the front surface 2C side.
Also with the projector 1B provided with such a duct 7C, the same effects as those of the projector 1B provided with the duct 7B can be obtained.

[Third Embodiment]
Next, a third embodiment will be described.
The projector according to this embodiment has the same configuration as the projector 1 described above. Here, in the projector 1, the duct 7 has a structure that captures dust including fragments of the ruptured light source lamp 411. On the other hand, in the projector according to the present embodiment, instead of the duct 7, the duct is fixed in the exterior casing 2 and is detachably attached in the exterior casing 2, and is connected to the duct and the light source device. And a dust collecting member that captures the dust flowing out from the exhaust port 4151 of the light source device 41. In this respect, the projector according to the present embodiment is different from the projector 1 described above. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 13 is a schematic diagram showing an internal configuration of the projector 1L according to the present embodiment.
As shown in FIG. 13, the projector 1 </ b> L according to the present embodiment includes an exterior housing 2 and an apparatus main body 3 </ b> L, and has the same functions as the projector 1.
Among these, the apparatus main body 3L has the same configuration as the apparatus main body 3 except that it includes a cooling device 6L instead of the cooling device 6 and further includes a dust collecting member 8. The cooling device 6 </ b> L includes fans 61 to 64 similarly to the cooling device 6 except that the cooling device 6 </ b> L has a duct 7 </ b> L instead of the duct 7.

[Configuration of dust collecting member]
FIG. 14 is a diagram showing a positional relationship among the light source device 41, the power supply device 5, the dust collecting member 8, and the duct 7L. In other words, FIG. 14 is a diagram showing a cross section in these XZ planes.
The dust collecting member 8 is detachably attached to the duct 7L, and has a function of guiding the air discharged from the light source device 41 to the duct 7L. In addition, the dust collecting member 8 has a function of capturing dust such as fragments of the light source lamp 411 from the air discharged from the light source device 41 when the light source lamp 411 is ruptured, and retaining the dust inside. The dust collecting member 8 is exposed by removing the lamp cover 2A1 (see FIG. 1), and is attached to and detached from the exterior housing 2 through an opening (not shown) closed by the lamp cover 2A1. . In the present embodiment, the dust collecting member 8 is detachably attached to the duct 7L.
As shown in FIG. 14, the dust collecting member 8 has an introduction port 81, a branch portion 82, a first duct portion 83, and a second duct portion 84.

The introduction port 81 is formed in a substantially rectangular shape according to the shape of the exhaust port 4151 of the main body 415. The introduction port 81 faces the exhaust port 4151 when the dust collecting member 8 is attached to the duct 7L and the light source device 41 is stored in the light source storage unit 471 of the optical component casing 47, and the exhaust port The air discharged from 4151 is introduced into the dust collecting member 8 through the inlet 81.
The branch portion 82 is located inside the introduction port 81 and communicates with each of the first duct portion 83 and the second duct portion 84, similarly to the branch portion 716. Of the air introduced into the dust collecting member 8 through the inlet 82 through the branch portion 82, the air having a high exhaust pressure from the exhaust port 4151 is orthogonal to the opening surface 4151A of the exhaust port 4151 and It circulates to the 1st duct part 83 side along the 1st direction C1 (this embodiment X direction) which is a direction which goes to the inlet 81 from exhaust port 4151. On the other hand, air having a low exhaust pressure from the exhaust port 4151 is in a second direction C2 that is a direction intersecting the first direction C1 by the suction force of the fan 64 disposed in the duct 7L facing the dust collecting member 8. (In this embodiment, it is the direction orthogonal to the first direction C1 when viewed from the Y direction side, and flows in the second duct portion 84 side along the direction opposite to the Z direction).

  The first duct portion 83 is a duct portion extending from the branch portion 82 along the first direction C1 (that is, the X direction). The first duct portion 83 is formed by side wall portions 831 to 834 similar to the side wall portions 7171 to 7174 of the duct portion 717 (see the drawing for the side wall portion on the Y direction side). Among these, the slit-like opening 836 elongated in the Y direction is formed at the end of the side wall portion 833 located on the first direction C1 side on the Z direction side. The opening 836 allows the air flowing through the first duct portion 83 to flow outside the first duct portion 83 and thus outside the dust collecting member 8 and outside the duct 7L along the first direction C1. Drain to site.

  In the first duct portion 83, a metal mesh 837 similar to the mesh 7177 is orthogonal to the first direction C1 on the opposite side of the opening 836 from the first direction C1. It is fixed. That is, the mesh 837 is disposed on the upstream side in the flow direction in which the air introduced from the introduction port 81 flows through the first duct portion 83 with respect to the opening 836. The mesh 837 is formed in a plate shape, and captures dust (for example, fragments of the light source lamp 411) included in the air flowing in the first duct portion 83 along the first direction C1.

  Of the side wall portions forming the first duct portion 83, the side wall portion 831 located on the Z direction side and along the XY plane is the end edge (Z direction) of the inlet port 81, similar to the side wall portion 7171. Side edge). For this reason, even when the air in the main body 415 flows from the exhaust port 4151 in a direction inclined toward the Z direction toward the first direction C1 due to the explosion pressure when the light source lamp 411 is ruptured, the air remains on the side wall. It circulates along the part 831 and is guided into the first duct part 83.

The second duct portion 84 is a duct portion extending from the branch portion 82 along the second direction C2 (that is, the direction opposite to the Z direction). The second duct portion 84 has a function of guiding the light source cooling air discharged from the exhaust port 4151 after cooling the light source lamp 411 to the fan 64 disposed in the duct 7L.
Here, as described above, the light source cooling air that has cooled the light source lamp 411 is discharged from the exhaust port 4151 by convection in the main body 415, but the exhaust pressure of the light source cooling air from the exhaust port 4151 is so high. Absent. On the other hand, the end of the second duct portion 84 faces the introduction port 7L12 of the duct 7L in which the fan 64 is disposed, so that the suction force of the fan 64 acts in the second duct portion 84. For this reason, the air introduced into the dust collecting member 8 from the exhaust port 4151 through the inlet port 81 circulates in the second duct portion 84 from the branch portion 82 except when the light source lamp 411 is ruptured. It flows into the duct 7 </ b> L through an opening 841 formed on the end surface on the X direction side at the end of the second duct portion 84. A mesh 842 similar to the mesh 837 is disposed in the opening 841. However, the mesh 842 may be omitted.

[Duct structure]
The duct 7L sucks the air that has flowed into the dust collecting member 8 from the light source device 41 by the fan 64 provided inside, and guides the air to the outside of the exterior housing 2 through the exhaust port 2E1. is there. The duct 7L includes an introduction portion 7L1 and the arrangement portion 73.
Among these, in the arrangement | positioning part 73, as mentioned above, the said fan 64 is arrange | positioned so that the suction direction and discharge direction of air may follow a direction opposite to a Z direction.

Similarly to the introduction part 71, the introduction part 7L1 faces the light source device 41, the power supply apparatus 5 and the dust collecting member 8, and introduces the air flowing through the light source apparatus 41 and the power supply apparatus 5 into the interior. The introduction portion 7L1 includes a connection portion 7L11 and introduction ports 7L12, 7L13, and 714 (not shown in FIG. 14) and 715.
The connecting portion 7L11 is a portion facing the left side surface portion 414E of the light source device 41 and the dust collecting member 8 in the duct 7L. This connection portion 7L11 is a mounted portion to which the dust collecting member 8 is detachably attached, and when the light source device 41 is inserted into the exterior housing 2 along the direction opposite to the Y direction, It is also a guide part that contacts the left side surface part 414E and guides the light source device 41 to be stored in the light source storage part 471.

The introduction port 7L12 is formed at a position corresponding to the opening 841 in the connection portion 7L11, and introduces air that has circulated through the second duct portion 84 of the dust collection member 8 into the introduction portion 7L1.
The introduction port 7L13 is formed at a position corresponding to the exhaust port 4152 in the connection portion 7L11, and introduces air that has cooled the back surface portion of the reflector 412 into the introduction portion 7L1.
Similarly to the case of the duct 7, the introduction ports 714 and 715 are formed in the introduction portion 7 </ b> L <b> 1 at a portion facing the power supply device 5, and air in the exterior housing 2 (for example, air that has cooled the power supply device 5). ) Is introduced into the introduction part 7L1.

[Flow path of air introduced from the light source device in a state other than when the light source lamp bursts]
FIG. 15 is a diagram illustrating a flow path of air flowing out from the light source device 41. In FIG. 15, the air flow path other than when the light source lamp 411 is ruptured is indicated by a solid arrow N1, and the air flow path when the light source lamp 411 is ruptured is indicated by a one-dot chain line arrow N2. .
In the present embodiment, in a state other than when the light source lamp 411 is ruptured (a state where the light source lamp 411 is not ruptured and a state after the rupture), air in the storage space S of the main body 415 (for example, light source cooling air) ) Follows the flow path indicated by the arrow N1 in FIG.
Specifically, the air is discharged from the exhaust port 4151 by convection in the main body 415 and flows into the dust collecting member 8 through the introduction port 81. The suction force of the fan 64 acts in the second duct portion 84 of the dust collecting member 8 as described above. For this reason, the air that has flowed into the dust collecting member 8 flows into the second duct portion 84 from the branch portion 82 along the second direction C <b> 2 by the suction force of the fan 64. The air flowing through the second duct portion 84 is introduced into the introduction portion 7L1 of the duct 7L through the opening portion 841 and the introduction port 7L12, and is discharged from the exhaust port 2E1 to the outside of the exterior housing 2 by the fan 64. The

[Flow path of air introduced from the light source device when the light source lamp bursts]
On the other hand, when the light source lamp 411 is ruptured, an explosion pressure is generated in the main body 415 as described above. Therefore, the exhaust pressure of the air in the storage space S from the exhaust port 4151 It is higher than the exhaust pressure except when 411 bursts, and higher than the suction pressure of the fan 64 that acts on the branch portion 82. For this reason, the air discharged from the exhaust port 4151 when the light source lamp 411 bursts follows the flow path indicated by the arrow N2 in FIG.
Specifically, the air is introduced into the dust collecting member 8 through the introduction port 81, then flows along the first direction C <b> 1 from the branch portion 82, and flows into the first duct portion 83. The The air travels straight in the first duct portion 83 along the first direction C1 and passes through the mesh 837. As a result, the dust contained in the air is captured by the mesh 837, falls in the vertical direction (that is, the direction opposite to the Y direction) after the explosion pressure is settled, and stays in the first duct portion 83. . The air from which the dust has been removed passes through the opening 836 along the first direction C1, and is discharged to the outside of the first duct portion 83, and hence the dust collecting member 8, and the outside of the duct 7L. Is done.

On the other hand, after the explosion pressure associated with the burst of the light source lamp 411 is settled, the air introduced into the dust collecting member 8 through the introduction port 81 follows the flow path indicated by the arrow N1 as described above. That is, the air flows into the second duct portion 84 from the branch portion 82 by the suction force of the fan 64. As described above, when the explosion pressure is settled, the air does not easily flow through the first duct portion 83. Therefore, the dust captured by the mesh 837 tends to stay in the first duct portion 83, and the dust collecting member. 8 It is hard to be discharged outside.
Although not shown, the air that has cooled the back side of the reflector 412 and the air that has cooled the power supply device 5 are connected to the inlets 7L13, 714, and 715 by the fan 64 regardless of the state of the light source lamp 411. It is introduced into the introduction part 7L1. These airs are also sucked by the fan 64 and discharged out of the exterior casing 2 from the exhaust port 2E1.

[Effect of the third embodiment]
According to the projector 1L according to the present embodiment described above, the same effects as those of the projector 1 can be obtained.
Air that has flowed out from the exhaust port 4151 (outlet port of the light source casing) of the housing 414 is introduced into the dust collecting member 8 from the inlet port 81.
Here, in a state other than when the light source lamp 411 is ruptured (a state where the light source lamp 411 is not ruptured or a state after the light source lamp 411 is ruptured), the exhaust pressure from the exhaust port 4151 is not relatively high. For this reason, the air introduced into the dust collection member 8 flows into the duct 7L through the second duct portion 84 by the suction force of the fan 64 in the duct 7L connected to the dust collection member 8. By doing so, the air that has cooled the light source lamp 411 can be discharged to the outside of the dust collecting member 8.

On the other hand, when the light source lamp 411 bursts, air containing dust such as fragments of the light source lamp 411 flows into the dust collecting member 8 from the exhaust port 4151. At this time, since the exhaust pressure from the exhaust port 4151 is relatively high due to the explosion pressure generated by the burst of the light source lamp 411, the air introduced into the dust collecting member 8 is orthogonal to the opening surface 4151A of the exhaust port 4151. It flows in the first direction C1 and flows into the first duct portion 83 from the branch portion 82. Since an opening 836 (first opening) is formed in the side wall part 833 constituting the first duct part 83, the air flowing into the first duct part 83 passes through the opening 836. To the outside of the first duct portion 83. When the air passes through the opening 836, the dust is captured by the mesh 837 covering the opening 836. Thereby, since the said dust is stopped in the 1st duct part 83, scattering of the dust to the dust collection member 8 exterior is suppressed.
Therefore, it is possible to prevent fine fragments of the light source lamp 411 from being scattered outside the dust collecting member 8 without making the mesh 4153 provided in the exhaust port 4151 finer, so that the cooling efficiency of the light source lamp 411 is reduced. The scattering of the debris can be suppressed without causing it.

  Due to the explosion pressure generated when the light source lamp 411 is ruptured, the air in the storage space S of the housing 414 (air containing the dust) flows in the first direction C1 through the exhaust port 4151, the inlet port 81, and the branching portion 82. It tends to flow into the extending first duct portion 83. The opening portion 836 of the first duct portion 83 is formed in the side wall portion 833 substantially orthogonal to the first direction C1, and the air that flows through the first duct portion 83 flows along the first direction C1 with a dust collecting member. 8 is discharged outside. According to this, since the air flowing through the first duct portion 83 can be quickly discharged from the opening 836, the air flowing through the first duct portion 83 is prevented from flowing backward by being blown to the side wall portion 833. it can. Therefore, it is possible to suppress the air containing the dust from flowing to the second duct portion 84 side, and it is possible to suppress the dust from being discharged to the outside of the dust collecting member 8.

Here, when the light from the light source lamp 411 leaks to the outside through the exhaust port 4151, if the opening 836 is formed on the substantially entire surface of the side wall portion 833 perpendicular to the first direction C1, the leaked light is first. There is a possibility of proceeding in the direction C1 and leaking to the outside of the dust collecting member 8 through the opening 836.
On the other hand, since the opening 836 is formed in a slit shape, the opening area of the opening 836 can be reduced. Therefore, even when the light leaks to the outside of the housing 414 through the exhaust port 4151, the light can be prevented from leaking to the outside of the dust collecting member 8.
Further, the mesh 837 is located on the opposite side to the first direction C1 with respect to the opening 836, that is, on the upstream side in the flow direction of the air passing through the opening 836. According to this, compared with the case where the said mesh 837 is located in the downstream, the captured dust can be made easy to stay in the 1st duct part 83. FIG. Therefore, it is possible to reliably suppress the dust including the fragments of the light source lamp 411 from being discharged to the outside of the dust collecting member 8.

  The mesh 837 is disposed at a position substantially orthogonal to the first direction C1. According to this, since the air that includes the dust and is discharged from the exhaust port 4151 along the first direction C1 when the light source lamp 411 is ruptured can reliably pass through the mesh 837, the mesh 837 This makes it easy to capture the dust. Therefore, it is possible to further suppress the fragments of the light source lamp 411 from being discharged to the outside of the first duct portion 83 and thus to the outside of the dust collecting member 8.

  The dust collecting member 8 is detachably attached to the connecting portion 7L11 of the duct 7L disposed in the exterior housing 2. According to this, when the light source lamp 411 is ruptured, it is possible to replace the dust collecting member 8 together with the light source device 41, thereby keeping the exterior casing 2 clean.

  The fan 64 in the duct 7L that connects the dust collecting member 8 and the exhaust port 2E1 (housing side exhaust port) is driven, so that the air in the storage space S of the housing 414 (for example, air that has cooled the light source lamp 411). ) And the air can be discharged to the outside of the exterior casing 2 through the exhaust port 2E1. Therefore, the cooling efficiency of the light source lamp 411 can be improved.

[Modification of Third Embodiment]
FIG. 16 is a sectional view of the duct 7M, which is a modification of the duct 7L, the light source device 41, and the power supply device 5 in the XZ plane.
In the duct 7L, the fan 64 is arranged in the arrangement portion 73 so that the air suction direction and the discharge direction are along the direction opposite to the Z direction. On the other hand, a duct 7M (FIG. 16) having an arrangement portion 73A is adopted instead of the arrangement portion 73, and the fan 64 is arranged so that the air suction direction and the discharge direction are along the X direction, similar to the ducts 7A and 7C. However, it may be arranged in the duct 7M. When such a duct 7M is employed, the exterior housing 2 in which an exhaust port (not shown) is formed in the front portion 2C is employed as described above.

[Fourth Embodiment]
Next, a fourth embodiment will be described.
The projector according to the present embodiment has the same configuration as the projector 1L. Here, in the dust collecting member 8 of the projector 1L, the opening portions 836 and 841 positioned at the terminal ends of the first duct portion 83 and the second duct portion 84 are formed at positions separated from each other. On the other hand, in the projector according to the present embodiment, as with the duct 7B, the openings through which the air flowing through the first duct portion and the second duct portion is discharged are formed at close positions. In this respect, the projector according to the present embodiment is different from the projector 1L. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 17 is a cross-sectional view of the light source device 41, the power supply device 5, the dust collecting member 8N, and the duct 7N included in the projector 1N according to the present embodiment in the XZ plane.
As shown in FIG. 17, the projector 1N according to the present embodiment has the same configuration and function as the projector 1L except that the dust collecting member 8N and the duct 7L are replaced by a dust collecting member 8N and a duct 7N.

[Configuration of dust collecting member]
The dust collection member 8N is detachably attached to the introduction portion 7L1 (specifically, the connection portion 7L11) of the duct 7L in the same manner as the dust collection member 8, and ducts the air discharged from the exhaust port 4151 of the light source device 41. It has a function as a duct member leading to 7N. In addition, the dust collecting member 8N has a function of collecting dust including fragments of the light source lamp 411 when the light source lamp 411 is ruptured and suppressing the dust from being scattered.
Such a dust collecting member 8N includes the introduction port 81 and the branching portion 82, and the first duct portion 85 and the second duct portion 86.

The first duct portion 85 is a duct portion through which the air in the storage space S that has flowed out from the exhaust port 4151 circulates mainly due to the explosion pressure generated when the light source lamp 411 is ruptured. After extending along the second direction C2 perpendicular to the first direction C1. The first duct portion 85 is formed by a side wall portion 851 that forms an edge on the Z direction side in the introduction port 81, and side wall portions 852 to 855 (see the drawing for the side wall portion on the Y direction side), In the first duct portion 85, the extending portion along the second direction C <b> 2 is closed like a narrow path by the side wall portions 852 to 855 and the side wall portion on the Y direction side.
An opening 856 is formed in the side wall 852 that is one of the side walls that form the closed portion and is located on the second direction C2 side. A metal mesh 857 similar to the mesh 837 is provided in the opening 856 so as to be orthogonal to the second direction C2. The mesh 857 is formed in a plate shape, and captures dust (for example, fragments of the light source lamp 411) contained in the air flowing through the first duct portion 85. The mesh 857 may be provided so as to cover the opening 856 on the second direction C2 side (the opposite side to the Z direction) or on the opposite side to the second direction C2 (the Z direction side). .

The second duct portion 86 is a duct portion through which air in the storage space S that has flowed out from the exhaust port 4151 circulates mainly at times other than when the light source lamp 411 is ruptured. It extends along C2. That is, the second duct portion 86 circulates substantially all of the air introduced from the main body portion 415 into the dust collecting member 8N by the suction force of the fan 64 when the light source lamp 411 is not ruptured. Has a function of guiding the air to the duct 7N.
Of the side wall portions that form the terminal portion of the second duct portion 86, the side wall portion on the first direction C1 (X direction) side is the side wall portion 855 that forms the first duct portion 85. Is formed with an opening 861 at a position closer to the second direction C2 than the side wall 852. And the air which distribute | circulated the 2nd duct part 86 is discharged | emitted outside the dust collection member 8N through the said opening part 861. FIG. Note that a mesh 862 similar to the mesh 857 is disposed in the opening 861.
As described above, the opening 861 and the opening 856 are formed at positions relatively close to each other in the side wall portions 855 and 852 orthogonal to each other. And the connection part 7N11 of the duct 7N is connected to the dust collection member 8N so that these opening parts 856 and 861 may be covered.

[Duct structure]
Similarly to the duct 7L, the duct 7N sucks air that has flowed from the light source device 41 into the dust collecting member 8N by the fan 64 and guides the air to the outside of the exterior housing 2 through the exhaust port 2E1. is there. The duct 7N includes an introduction portion 7N1 and the arrangement portion 73.
The introduction unit 7N1 faces the light source device 41, the power supply device 5, and the dust collecting member 8N, and introduces air that has cooled the light source device 41 and the power supply device 5 into the interior, similarly to the introduction units 71 and 7L1. The introduction portion 7N1 includes a connection portion 7N11 and introduction ports 7N12, 7N13, 7L13, and 714 (not shown in FIG. 17) and 715.

Similarly to the connection portion 7L11, the connection portion 7N11 is a portion facing the left side surface portion 414E of the light source device 41 and the dust collecting member 8N in the duct 7N. The connection portion 7N11 is a mounted portion to which the dust collecting member 8N is attached, and is also a guide portion that guides the storage of the light source device 41 in the light source storage portion 471.
The introduction ports 7N12 and 7N13 are formed at positions corresponding to the openings 856 and 861 in the connection portion 7N11. Then, air flowing through the first duct portion 85 and flowing out from the opening portion 856 is introduced into the introduction portion 7N1 through the introduction port 7N12, and the second duct portion 86 is introduced into the introduction portion 7N13 through the introduction port 7N13. The air that flows and flows out from the opening 861 is introduced into the introduction portion 7N1.
The introduction port 7L13 is formed at a position corresponding to the exhaust port 4152 in the connection portion 7N11, and air that has cooled the back surface portion of the reflector 412 is introduced into the introduction portion 7N1 through the introduction port 7L13.
The introduction ports 714 and 715 are formed on the surface facing the power supply device 5 in the introduction portion 7N1.

[Flow path of air introduced from the light source device in a state other than when the light source lamp bursts]
FIG. 18 is a diagram illustrating a flow path of air flowing out from the light source device 41. In FIG. 18, the air flow path other than when the light source lamp 411 is ruptured is indicated by a solid arrow N3, and the air flow path when the light source lamp 411 is ruptured is indicated by a dashed-dotted arrow N4. .
In the present embodiment, in a state other than when the light source lamp 411 is ruptured, the air (for example, light source cooling air) in the storage space S of the main body 415 follows the flow path indicated by the arrow N3 in FIG.
Specifically, the air flows out from the exhaust port 4151 by convection in the main body 415, and flows into the dust collecting member 8N from the exhaust port 4151 through the introduction port 81. The air is sucked by the fan 64 in the duct 7N connected to the dust collecting member 8N and mainly circulates in the second duct portion 86. Then, the air is introduced into the duct 7N through the opening 861 and the introduction port 7N13, and is discharged out of the exterior casing 2 from the exhaust port 2E1 by the fan 64.

[Flow path of air introduced from the light source device when the light source lamp bursts]
On the other hand, when the light source lamp 411 is ruptured, the air in the storage space S follows the flow path indicated by the arrow N4 in FIG.
Specifically, after the air is discharged from the exhaust port 4151 along the first direction C1, the air flows into the dust collecting member 8N through the introduction port 81, and enters the first duct portion 85 from the branch portion 82. Is flowed into. Since the first duct portion 85 extends from the branch portion 82 along the first direction C1 and then extends along the second direction C2, the air discharged by the explosion pressure is It flows through the inside of the duct portion 85 and passes through the mesh 857 in the opening 856 formed in the side wall portion 852 on the second direction C2 side at the end. The mesh 857 captures dust contained in the air and stays at the end portion of the first duct portion 85 formed in a bag path shape. On the other hand, the air from which the dust has been removed is introduced into the duct 7N through the inlet 7N12 formed at a position corresponding to the opening 856, and is discharged out of the exterior casing 2 from the exhaust port 2E1 by the fan 64. .

  Although not shown, the air that has cooled the back side of the reflector 412 and the air that has cooled the power supply device 5 are introduced into the inlet 7L13 by the fan 64 regardless of the state of the light source lamp 411, as described above. , 714, 715 and introduced into the introduction part 7N1. And these air is also discharged | emitted out of the exterior housing | casing 2 from the exhaust port 2E1.

[Effect of Fourth Embodiment]
According to the projector 1N according to the present embodiment described above, the same effects as the projector 1L can be obtained, and the following effects can be obtained.
The first duct portion 85 extends in the first direction C1 and then extends in the second direction C2, and an opening 856 through which the air flowing through the first duct portion 85 flows out to the outside is , Formed on the side wall portion 852 located on the second direction C2 side. According to this, the shape of the first duct portion 85 on the end side in the air flow path that circulates through the first duct portion 85 becomes a bag path, so that dust captured by the mesh 857 covering the opening 856 is removed. , It can be easily retained in the first duct portion 85. Therefore, it is possible to reliably suppress the dust including the fragments of the light source lamp 411 from being discharged to the outside of the dust collecting member 8N.
Further, since the mesh 857 is disposed in a portion extending along the second direction C2 in the first duct portion 85 so as to be orthogonal to the second direction C2, the air passing through the mesh 857 can be prevented. The dust can be easily captured.

[Modification of Fourth Embodiment]
FIG. 19 is a cross-sectional view in the XZ plane of the duct 7P, which is a modification of the duct 7N, the light source device 41, the power supply device 5, and the dust collecting member 8N.
In the duct 7N, the fan 64 is arranged in the arrangement part 73 so that the air suction direction and the discharge direction are along the direction opposite to the Z direction. In contrast, a duct 7P (FIG. 19) having an arrangement portion 73A is employed instead of the arrangement portion 73, and the fan 64 is arranged in the duct 7P so that the air suction direction and the discharge direction are along the X direction. May be. When such a duct 7P is employed, the exterior housing 2 in which an exhaust port (not shown) is formed in the front portion 2C is employed.

[Fifth Embodiment]
Next, a fifth embodiment will be described.
The projector according to the present embodiment has the same configuration as the projector 1N. Here, the dust collecting member 8N of the projector 1N circulates through the duct portions 85 and 86 via the opening portions 856 and 861 formed at the terminal ends of the first duct portion 85 and the second duct portion 86, respectively. It was the structure which distribute | circulates the air in the duct 7N. On the other hand, in the projector according to the present embodiment, the dust collecting member aggregates the air that has circulated through the first duct portion and the second duct portion and distributes the air from one exhaust port to the duct. In this respect, the projector according to the present embodiment is different from the projector 1N. In the following description, parts that are the same as or substantially the same as those already described are assigned the same reference numerals and description thereof is omitted.

FIG. 20 is a cross-sectional view of the light source device 41, the power supply device 5, the dust collecting member 8Q, and the duct 7Q included in the projector 1Q according to the present embodiment on the XZ plane. It is a figure which shows the flow path of the air which distribute | circulates.
The projector 1Q according to the present embodiment has the same configuration and function as the projector 1N except that the dust collecting member 8Q and the duct 7Q are provided instead of the dust collecting member 8N and the duct 7N.

[Configuration of dust collecting member]
The dust collection member 8Q is detachably attached to the duct 7Q, similarly to the dust collection members 8 and 8N, and has a function of guiding the air discharged from the exhaust port 4151 of the light source device 41 to the duct 7Q. In addition, the dust collecting member 8Q has a function of preventing the fragments of the light source lamp 411 from scattering when the light source lamp 411 is ruptured.
The dust collection member 8Q includes an aggregation portion 87 in addition to the configuration of the dust collection member 8N. That is, the dust collecting member 8Q includes an introduction port 81, a branching part 82, a first duct part 85, a second duct part 86, and an aggregation part 87.

The concentrating part 87 consolidates the air that has circulated through the first duct part 85 and the second duct part 86. The concentrating portion 87 is formed in the Y direction by the side wall portions 852 and 855 and the side wall portions 871 facing the side wall portions 852 and 855 on the downstream side in the flow direction of the air flowing through the duct portions 85 and 86. It is formed in a substantially triangular shape when viewed from the side. In other words, the aggregating portion 87 is a position on the second direction C2 side (opposite to the Z direction) with respect to the end of the first duct portion 85, and in the first direction C1 side (X direction) with respect to the end of the second duct portion 86. Side) position.
The air that has flowed through the first duct portion 85 flows into the concentrating portion 87 through the opening portion 856, and the air that has flowed through the second duct portion 86 flows through the opening portion 861. These air flows out of the dust collecting member 8Q through the exhaust port 872 formed in the side wall portion 871.

  In the present embodiment, meshes 857, 862, and 873 are disposed in the openings 856 and 861, and the exhaust port 872, respectively. However, the present invention is not limited to this, and the mesh may be arranged only in one of the opening 856 and the exhaust port 872. Further, the mesh 862 provided in the opening 861 may be omitted.

[Duct structure]
Similarly to the duct 7N, the duct 7Q guides the air that has flowed from the light source device 41 to the dust collecting member 8Q to the outside of the exterior housing 2 through the exhaust port 2E1. The duct 7Q has an introduction part 7Q1 and an arrangement part 73 in which the fan 64 is arranged.
Similarly to the introduction part 7N1, the introduction part 7Q1 faces the light source device 41, the power supply apparatus 5 and the dust collecting member 8Q, and introduces the air circulated through the light source apparatus 41 and the power supply apparatus 5 into the interior. The introduction portion 7Q1 has the same configuration as the introduction portion 7N1 except that the connection portion 7Q11 and the introduction port 7Q12 are provided instead of the connection portion 7N11 and the introduction ports 7N12 and 7N13. That is, the introduction part 7Q1 has a connection part 7Q11 and introduction ports 7Q12, 7L13, 714 (not shown in FIG. 20), 715.

Similarly to the connection portion 7N11, the connection portion 7Q11 is a portion facing the left side surface portion 414E of the light source device 41 and the dust collecting member 8Q in the duct 7Q. The connecting portion 7Q11 is a mounted portion to which the dust collecting member 8Q is detachably attached. The connecting portion 7Q11 is in contact with the left side surface portion 414E and guides the storage of the light source device 41 in the light source storage portion 471. But there is.
The introduction port 7Q12 is formed at a position corresponding to the exhaust port 872 in the connection portion 7Q11. Via this inlet 7Q12, the air that flows through the dust collecting member 8Q and is discharged from the outlet 872 is introduced into the inlet 7Q1.

[Flow path of air introduced from the light source device in a state other than when the light source lamp bursts]
In a state other than when the light source lamp 411 is ruptured, the air in the storage space S of the main body 415 flows through the dust collection member 8Q from the exhaust port 4151 through the introduction port 81 as indicated by the solid arrow N5 in FIG. Into the inside. The air is sucked by the fan 64 and mainly circulates in the second duct portion 86. Then, after the air has circulated through the concentrating portion 87, the air is introduced into the duct 7Q via the exhaust port 872 and the introduction port 7Q12, and is discharged from the exhaust port 2E1 to the outside of the exterior casing 2 by the fan 64.

[Flow path of air introduced from the light source device when the light source lamp bursts]
At the time of rupture of the light source lamp 411, the air in the storage space S is caused by the explosion pressure from the exhaust port 4151 through the exhaust port 4151 as shown by the two-dot chain line arrow N6 in the same manner as in the projector 1N. It is discharged along the one direction C1 and flows into the dust collecting member 8Q through the introduction port 81. Thereafter, the air flows along the first duct portion 85 from the branch portion 82 and reaches the opening portion 856 positioned on the second direction C2 side. When the air passes through the opening 856, the dust contained in the air is captured by the mesh 857. The air from which the dust has been removed flows into the concentrating portion 87, and then is introduced into the duct 7Q through the exhaust port 872 and the introduction port 7Q12 as indicated by the arrow N5, and is exhausted by the fan 64. 2E1 is discharged out of the outer casing 2.

  Similarly to the above, the air that has cooled the back side of the reflector 412 and the air that has cooled the power supply device 5 are routed by the fan 64 via the inlets 7L13, 714, and 715 regardless of the state of the light source lamp 411. Then, it is introduced into the introduction portion 7Q1 and is discharged out of the exterior casing 2 by the fan 64.

[Effect of Fifth Embodiment]
According to the projector 1Q according to the present embodiment described above, the same effects as those of the projector 1N can be obtained, and the following effects can be obtained.
Since the dust collection member 8Q includes the concentrating portion 87, the air that has circulated through the first duct portion 85 and the air that has circulated through the second duct portion 86 can be integrated and discharged from one exhaust port 872. Accordingly, the duct 7Q into which the air that has flowed out from the dust collection member 8Q is introduced, compared to the case where the dust collection member 8N in which the air that has circulated through the duct portions 85 and 86 is discharged from different parts is employed. Can be simplified.
In addition, even when the dust captured by the mesh 857 moves to the second duct portion 86 side by the mesh 873 provided in the exhaust port 872, the dust can be prevented from scattering outside the dust collecting member 8Q. Furthermore, since the mesh 862 is also provided in the opening 861 through which the air circulated through the second duct 86 passes, the dust can be reliably prevented from scattering outside the dust collecting member 8Q.

[Modification of Fifth Embodiment]
FIG. 21 is a cross-sectional view in the XZ plane of the duct 7R, which is a modification of the duct 7Q, the light source device 41, the power supply device 5, and the dust collecting member 8Q.
In the duct 7Q, the fan 64 is arranged in the arrangement portion 73 so that the air suction direction and the discharge direction are along the direction opposite to the Z direction. In contrast, a duct 7R (FIG. 21) having an arrangement portion 73A is employed instead of the arrangement portion 73, and the fan 64 is arranged in the duct 7R so that the air suction direction and the discharge direction are along the X direction. May be. When such a duct 7R is employed, the exterior housing 2 in which an exhaust port (not shown) is formed in the front portion 2C is employed.

[Modification of each embodiment]
The present invention is not limited to the above-described embodiments, and modifications, improvements, and the like within the scope that can achieve the object of the present invention are included in the present invention.
In each of the above embodiments, the ducts 7, 7A to 7C, 7L to 7N, and 7P to 7R are formed in a substantially L shape when viewed from the Y direction side. However, the present invention is not limited to this. For example, the duct may have a substantially U shape in which the duct portions 717 and 717B further extend in the first direction A1. That is, the shape of the duct can be changed as appropriate.

In the first and second embodiments, the ducts 7 and 7 </ b> A to 7 </ b> C are at least one of the duct portions 717 and 717 </ b> B along the first direction A <b> 1 orthogonal to the opening surface 4151 </ b> A that is a plane connecting the edges of the exhaust ports 4151. The portion extends from the branch portion 716, and at least a part of the duct portion 718 extends from the branch portion 716 along the second direction A <b> 2 orthogonal to the first direction A <b> 1. Among these, the first direction A1 is a direction along the X direction in the projectors 1 and 1B, and the second direction A2 is a direction along the direction opposite to the Z direction. However, the present invention is not limited to this. For example, when the exhaust port 4151 is formed at a position opening in the Z direction, the first direction A1 may be a direction along the Z direction, and the second direction A2 is orthogonal to the Z direction. It may be a direction. That is, the position of the exhaust port 4151 in the light source device 41 can be changed as appropriate. In the projector, each of the first direction A1 orthogonal to the opening surface 4151A and the second direction A2 orthogonal to the first direction A1. Can be appropriately changed in consideration of the configuration of the light source device 41, the position of the exhaust port 4151, and the like.
Similarly, in the third to fifth embodiments, the first direction C1 is the direction along the X direction, and the second direction C2 is the direction opposite to the Z direction. However, the present invention is not limited to this. For example, the second direction C2 may be a direction along the Z direction. That is, the respective directions of the first direction C1 and the second direction C2 intersecting the first direction C1 can be appropriately changed in consideration of the configuration of the light source device 41, the position of the exhaust port 4151, and the like.

In the said 1st Embodiment, the opening part 7176 which the duct part 717 has was formed in the side wall part 7173 located in the 1st direction A1 side in the said duct part 717. In FIG. In the second embodiment, the opening 7176 is formed in the side wall portion 7172 located on the second direction A2 side in the duct portion 717. However, the present invention is not limited to this. For example, the opening portion 7176 may be formed in the side wall portion 7171 opposite to the second direction A2 in the duct portion 717, and the side wall portion in the direction orthogonal to each of the first direction A1 and the second direction A2 ( For example, it may be formed on the side wall portion 7174). That is, the position where the opening 7176 is formed may be any side wall. Furthermore, the air that has passed through the opening 7176 formed in the side wall portion 7173 in the duct portion 717 may flow through the duct portion 718. In this case, the opening portion 7176 may be formed at a position opposite to the Z direction in the side wall portion 7173, and the air that has passed through the opening portion 7176 may be guided to the duct portion 718.
Similarly, in the third embodiment, in the dust collecting member 8, the opening 836 through which the air flowing through the first duct portion 83 is discharged is located in the first direction C1 in the first duct portion 83, and The side wall portion 833 substantially orthogonal to the first direction C1 is formed. However, the present invention is not limited to this. For example, it may be formed on the side wall portion 831, or may be formed on the side wall portion (not shown) located on the Y direction side, or on the side wall portion 834 located on the opposite side to the Y direction. That is, the position of the opening 836 may be anywhere in the first duct portion 83.

In the first and third embodiments, the plate-like meshes 7177 and 837 are arranged at positions orthogonal to the first directions A1 and C1. However, the present invention is not limited to this. That is, the meshes 7177 and 837 are arranged in any direction and position as long as they are arranged at positions covering the openings 7176 and 836 and can capture fragments (dust) of the light source lamp 411 from the air discharged from the light source device 41. It may be. For example, the meshes 7177 and 837 may be disposed to be inclined in the first direction A1 or C1.
The meshes are not limited to metal, and may be made of resin as long as strength and durability can be secured.

In the first and third embodiments, the openings 7176 and 836 are formed in a slit shape at the end portions on the Z direction side of the side wall portions 7173 and 833. However, the present invention is not limited to this. That is, the opening portions 7176 and 836 may be formed in the center of the side wall portions 7173 and 833, for example, if the light shielding property or the like is not taken into consideration.
In the first and third embodiments, the meshes 7177 and 837 are opposite to the first directions A1 and C1 with respect to the openings 7176 and 836 (that is, in the air flow path passing through the openings 7176 and 836). It was supposed to be located upstream). However, the present invention is not limited to this. For example, the meshes 7177 and 837 may be fitted into the openings 7176 and 836. Further, the meshes 7177 and 837 may be disposed on the downstream side of the openings 7176 and 836 so as to cover the openings 7176 and 836.

In each of the embodiments described above, the fan 64 is disposed in the ducts 7, 7B, 7L, 7N, and 7Q so that the air suction direction and the discharge direction are in the direction opposite to the Z direction. Arranged in the ducts 7A, 7C, 7M, 7P, and 7R so that the discharge direction is along the X direction. However, the present invention is not limited to this. For example, the fan 64 may be disposed in the duct so that the air suction direction and the discharge direction are along the Y direction or the direction opposite to the Y direction. In this case, what is necessary is just to form the exhaust port of the exterior housing | casing 2 by which the air is discharged | emitted by the fan 64 in the top | upper surface part 2A or the bottom face part 2B. That is, in the first and second embodiments, the position of the fan 64 is not limited as long as the air introduced into the duct can be circulated through the duct portion 718 in a state where the light source lamp 411 is not ruptured. In the third to fifth embodiments, the air introduced into the dust collecting members 8, 8N, 8Q is circulated to the second duct portions 84, 86 in a state where the light source lamp 411 is not ruptured. If it is possible, the position of the fan 64 does not matter.
Further, the fan 64 is not limited to an axial fan, and may be a centrifugal fan (sirocco fan). For example, the fan 64 configured by a centrifugal fan may be arranged such that the intake surface faces the Z direction and the exhaust surface faces the X direction. In other words, the fan 64 may be arranged in the arrangement portion 73A so that the air suction direction is along the direction opposite to the Z direction and the discharge direction is along the X direction.

  In the said 1st and 2nd embodiment, it was the structure which fastens the fragment | piece of the light source lamp 411 captured by the mesh 7177 in the duct parts 717 and 717B. In the third to fifth embodiments, the fragments of the light source lamp 411 captured by the meshes 837 and 857 are retained in the first duct portions 83 and 85. On the other hand, concave portions that are recessed in the vertical direction from the arrangement positions of the meshes 7177, 837, and 857 are formed in the duct portions 717 and 717B and the first duct portions 83 and 85, and fragments (dust dust) captured by the meshes 7177, 837, and 857 are formed. ) May fall into the recess so that the debris does not scatter more reliably.

  In the third embodiment, the opening 836 located at the terminal end of the first duct portion 83 in the dust collecting member 8 is covered with the mesh 837 located on the opposite side to the first direction C1, and the second duct portion 84 is A mesh 842 was disposed in the opening 841 located at the end. In the fourth embodiment, the openings 856 located at the end of the first duct portion 85 and the openings 861 located at the end of the second duct portion 86 in the dust collecting member 8N are respectively provided with meshes 857, 862 was provided. Furthermore, in the said 5th Embodiment, the mesh 873 was provided in the exhaust port 872 of the aggregation part 87 in the dust collection member 8Q. And it was supposed that by these structures, dust, such as a fragment of the light source lamp 411, was suppressed from being scattered outside the dust collecting members 8, 8N, 8Q. However, the structure is not limited to the structure that suppresses the scattering of the dust from the opening and the exhaust port by using only the mesh. For example, when the dust collection members 8, 8N, 8Q are removed from the exterior housing 2, the openings 836, 841, 856, 861 and the exhaust port 872 are closed by the shutter, and the dust collection members 8, 8N, 8Q are When mounted in the exterior housing 2, the openings 836, 841, 856, 861 and the exhaust port 872 may be opened. In this case, for example, when the lamp cover 2A1 is mounted on the top surface portion 2A, operation members such as buttons and levers provided on the dust collecting members 8, 8N, and 8Q are pressed by the lamp cover 2A1, thereby causing the shutter to move. When the opening 836, 841, 856, 861 and the exhaust port 872 are opened by moving in the opening direction and the lamp cover 2A1 is removed, the shutter is moved in the closing direction and the opening 836, 841, 856, 861 and The exhaust port 872 can be closed. Even when the mesh is provided in accordance with the opening and the exhaust port, the arrangement position of the mesh may be in the opening and the exhaust port as described above, and the air flowing through the opening is distributed. It may be upstream or downstream in the direction.

  In the third to fifth embodiments, the dust collecting members 8, 8N and 8Q are detachably attached to the ducts 7L to 7N and 7P to 7R in the present embodiment, and are attached to the ducts 7L to 7N and 7P to 7R. The light source device 41 is connected to the ducts 7L to 7N and 7P to 7R by being attached. However, the configuration to which the dust collecting members 8, 8N, and 8Q are attached is not limited to the ducts 7L to 7N and 7P to 7R, but may be other configurations in the exterior housing 2. For example, you may provide the attachment part to which the dust collection member 8,8N, 8Q is attached to the inner surface of the exterior housing | casing 2 so that attachment or detachment is possible.

  In each of the embodiments described above, the light source device 41 includes the light source lamp 411, the reflector 412 and the collimating lens 413, and the housing 414 as a light source casing that houses them. Such a light source device 41 is not limited to the configuration in which one projector is provided, and a plurality of light source devices may be provided. In this case, the dust collection member and the duct may be provided according to each light source device, and the air discharged from each light source device may be collected by one duct.

In each of the embodiments described above, the image forming apparatus 4 is configured to have a substantially L shape when viewed from the Y direction side. However, the present invention is not limited to this. For example, the image forming apparatus may be configured in a substantially U shape when viewed from the Y direction side.
In the above embodiments, the projectors 1, 1B, 1L, 1N, and 1Q include the three liquid crystal panels 453 (453R, 453G, and 453B). However, the present invention is not limited to this. That is, the present invention can also be applied to a projector using two or less or four or more liquid crystal panels. Further, the liquid crystal panel employed is not limited to the transmissive liquid crystal panel 453 having a light incident surface and a light exit surface different from each other, and a reflective liquid crystal panel having the same light incident surface and the same light exit surface may be used. Good. Further, if the light modulation device can modulate incident light and form an image according to image information, a device using a micromirror, for example, a device using a DMD (Digital Micromirror Device) or the like can be used. A light modulation device may be used.

  In each of the above embodiments, the front type projectors 1, 1B, 1L, 1N, and 1Q in which the image projection direction and the image observation direction are substantially the same are illustrated. However, the present invention is not limited to this. For example, the present invention can be applied to a rear type projector in which the projection direction and the observation direction are opposite directions.

  1L, 1N, 1Q ... projector, 2 ... exterior housing, 2E1 ... exhaust port (housing side exhaust port), 41 ... light source device, 411 ... light source lamp, 414 ... housing (housing for light source), 4151 ... exhaust port ( Outlet), 453 (453R, 453G, 453B) ... liquid crystal panel (light modulation device), 46 ... projection optical device, 64 ... fan, 7L-7N, 7P-7R ... duct, 8, 8N, 8Q ... dust collecting member , 81 ... introduction port, 82 ... branching part, 83, 85 ... first duct part, 831 to 834, 851 to 855 ... side wall part, 836, 856 ... opening part (first opening part), 837, 857 ... mesh, 84, 86 ... 2nd duct part, 841, 861 ... Opening part (2nd opening part), 87 ... Aggregation part, 872 ... Exhaust port, C1 ... 1st direction, C2 ... 2nd direction.

Claims (8)

A dust collecting member that is used in a projector including a light source lamp and a light source device having a light source housing that houses the light source lamp, and that collects dust from air flowing in from the light source housing,
An inlet for introducing air that has flowed out of the outlet of the light source housing;
A branching section for branching air introduced from the inlet;
A first duct portion that extends from the branch portion along a first direction orthogonal to an opening surface that connects the edge of the outlet and through which the air introduced from the inlet through the branch portion can flow. When,
A second duct portion extending from the branch portion along a second direction intersecting the first direction and allowing air introduced from the inlet through the branch portion to flow,
The first duct part is
A plurality of side wall portions forming the first duct portion;
A first opening that is formed in at least one of the plurality of side wall portions and allows air flowing through the first duct portion to flow outside the first duct portion;
A mesh covering the first opening,
The dust collecting member, wherein the second duct part has a second opening for allowing air flowing through the second duct part to circulate outside the second duct part. In the dust collection member according to claim 1,
The first opening is formed in a side wall portion substantially orthogonal to the first direction among a plurality of side wall portions forming the first duct portion, and air flowing through the first duct portion is passed in the first direction. A dust collecting member that is discharged to the outside of the dust collecting member along the line. In the dust collection member according to claim 2,
The first opening is formed in a slit shape,
The dust collecting member, wherein the mesh is located on a side opposite to the first direction with respect to the first opening. In the dust collecting member according to any one of claims 1 to 3,
The dust collecting member, wherein the mesh is disposed at a position substantially orthogonal to the first direction. In the dust collection member according to claim 1,
The first duct portion extends in the first direction, and then extends along the second direction.
The first opening is formed in a side wall located on the second direction side among the plurality of side walls forming the first duct part,
The dust collecting member, wherein the mesh is disposed at a position substantially orthogonal to the second direction. The dust collecting member according to claim 5,
An aggregating unit that aggregates the air that has passed through the mesh through the first duct part and the air that has passed through the second duct part;
The concentrating part has an exhaust port for discharging the inflowed air to the outside of the dust collecting member. An exterior casing constituting the exterior; and
A light source device;
A light modulation device that modulates light emitted from the light source device;
A projection optical device for projecting light modulated by the light modulation device;
A dust collecting member according to any one of claims 1 to 6,
The light source device
A light source lamp,
A light source housing that houses the light source lamp and has an outlet through which air that has cooled the light source lamp flows out.
The projector according to claim 1, wherein the dust collecting member is detachably attached to a position in the exterior casing where air discharged from the outlet is introduced into the interior through the inlet. The projector according to claim 7,
Each including a duct and a fan disposed in the exterior casing,
The exterior casing has a casing-side exhaust port that discharges air inside.
The duct connects the dust collecting member and the housing side exhaust port,
The fan is disposed in the duct and discharges the air flowing through the dust collecting member from the housing side exhaust port to the outside of the exterior housing.

Images