JP2006091132A - Projector device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To extend the product life of a discharge lamp, prolong the use period of a projector device and reduce a maintenance cost by properly cooling the discharge lamp serving as a light source for the projector device, and preventing deterioration of a luminance characteristic of the discharge lamp and deterioration of the product life of the discharge lamp. <P>SOLUTION: The projector device includes: the discharge lamp as a light source; a reflector designed such that the discharge lamp is accommodated in it, its internal face is mirror-finished, and an opening for emitting light is made; a cooling fan for sending a cooling air into the reflector; a duct in which a cooling air inlet is formed for guiding the cooling air, created by the cooling fan, into the reflector; and a cooling air guide plate attached to the cooling air inlet and used to guide the cooling air towards the upper face of the discharge lamp. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector apparatus, and more particularly to a projector apparatus that guides cooling air in an appropriate direction in order to appropriately cool a light source.

  The projector device condenses the light emitted from the light source using a reflector such as a reflector, performs optical processing on the image display panel as a prism, reflector, and light modulation element, and then enlarges the image using a projection lens. It is projected and displayed on the screen.

  Here, as a light source, for example, a discharge lamp such as a metal hydride lamp generally generates high heat during light emission, but it is known that the high heat causes the discharge lamp to receive a large load and the product life is shortened by the load. . For this reason, conventionally, cooling is performed by blowing cooling air to a lamp housing provided with a metal hydride lamp with an axial fan (see Patent Document 1).

  However, since the metal hydride lamp generates heat, even if the cooling air is blown onto the lamp housing provided with the metal hydride lamp, the cooling effect is not always sufficient.

  Therefore, cooling is performed by blowing cooling air directly on the discharge lamp.

  FIG. 9 illustrates an example thereof, and is a side cross-sectional view of the vicinity of the light emitting unit when the projector device is grounded to a floor surface (not shown) (hereinafter referred to as “stationary grounding”). In a lamp housing (not shown), a hemispherical inner surface is mirror-finished, a reflector 10 having a light irradiation opening 11 for irradiating light, and a discharge lamp housing opening 12 provided at the base of the reflector 10. The light source lamp 4 composed of the discharge lamp 13 inserted so that the light emitting portion is positioned in the reflector 10 is housed.

  A lamp holding member 14 for holding the light source lamp 4 in a lamp housing (not shown) is provided at the edge of the light irradiation opening 11. In the opening 15 on the reflector side of the lamp holding member 14, a plate-shaped explosion-proof glass 19 is disposed so as to close the opening 15 on the reflector side 10.

  Further, a duct 20 for sending cooling air into the reflector 10 is formed integrally with the lamp holding member 14 at the lower end portion of the lamp holding member 14.

  A cooling air inlet 21 for sending cooling air into the reflector 10 is provided on the upper surface of the duct 20. In addition, a sirocco fan 7 that generates cooling air to be sent into the reflector 10 is connected to the duct 20.

  Under such a configuration, a case where the projector apparatus is installed so that the sirocco fan 7 is positioned on the lower end side of the reflector 10 as shown in FIG. 9 (hereinafter referred to as “stationary installation”) will be described first.

  When the projector device is driven, the discharge lamp 13 is turned on, and at the same time, the sirocco fan 7 is also started to drive and the cooling air X is generated. The cooling air X flows through the duct 20 in the direction of the light source lamp 4 and is guided in the direction of the cooling air inlet 21 after colliding with a wall provided at the end of the duct 20 on the light source lamp 4 side. The cooling air X that has passed through the cooling air inlet 21 collides with the vicinity of the upper surface of the lamp holding member 14 and the reflector 10, and then is blown mainly on the upper surface of the discharge lamp 13 to cool the discharge lamp 13. Thereafter, the cooling air X blown to the discharge lamp 13 is sucked by the axial fan 8 from the gap of the discharge lamp housing opening 12 and then discharged.

  Next, a case where the projector apparatus is installed stationary and a case where the projector apparatus is installed on a ceiling surface (not shown) in the upside down direction (hereinafter referred to as “ceiling installation”) will be described.

FIG. 10 shows a case where the projector apparatus is suspended from the ceiling, and the sirocco fan 7 is located on the upper end side of the reflector 10. Also in this case, when the project apparatus is driven, the discharge lamp 13 is turned on, the sirocco fan 7 is driven, and the cooling air Y is generated in the direction of the light source lamp 4. The cooling air Y is guided in the direction of the cooling air inlet 21 after colliding with a wall provided at the end of the duct 20 on the light source lamp 4 side. The cooling air Y that has passed through the cooling air inlet 21 collides with the lamp holding member 14 and the vicinity of the lower surface inside the reflector 10, and then is blown mainly on the lower surface of the discharge lamp 13 to cool the discharge lamp 13. Thereafter, the cooling air Y blown to the discharge lamp 13 is sucked from the gap of the discharge lamp housing opening 12 by the axial fan 8 and then discharged.
JP-A-10-106307

  Since the heat generated by lighting the discharge lamp 13 moves upward due to air convection, the upper surface of the discharge lamp 13 becomes higher than the lower surface. Here, regardless of whether the discharge lamp 13 is in a stationary installation or a ceiling-mounted state, the upper and lower surfaces of the discharge lamp 13 are standard values for lighting temperature in order to prevent deterioration due to excessive heating and cooling. Is provided.

  And when cooling the discharge lamp heated excessively by lighting with cooling air, the cooling air of the air quantity for cooling the upper surface of the discharge lamp which becomes high temperature to the temperature within the range of a standard value is the reflector 10. Is sprayed on. For this reason, the upper surface has a temperature within the range of the standard value, but the lower surface is excessively cooled and generally falls below the standard value, which causes deterioration of the discharge lamp.

  Therefore, as shown in FIG. 10, in the case of ceiling installation, since the cooling air Y is blown more than necessary on the lower surface of the discharge lamp 13, the lower surface is excessively cooled.

  When the discharge lamp 13 is turned on, high heat is generated and the heat convects upward, so that the temperature of the upper surface of the discharge lamp 13 becomes higher than the temperature of the lower surface. In the case of stationary grounding in FIG. 9, the cooling air X is mainly blown onto the upper surface of the discharge lamp 13, so that the upper surface portion of the discharge lamp 13 in a high temperature state can be effectively cooled.

  On the other hand, in the case of the ceiling suspended ground shown in FIG. 10, the cooling air Y is mainly blown to the lower surface of the discharge lamp 13, and the upper surface portion of the discharge lamp 13 in a high temperature state cannot be cooled. And the lower surface of the discharge lamp is excessively cooled.

  When the discharge lamp 13 is cooled, even if the temperature is too high and too low, the luminance characteristics of the discharge lamp 13 are deteriorated, so that the product life is shortened.

  Accordingly, the present invention appropriately cools a discharge lamp, which is a light source used in a projector device, and prevents the deterioration of the luminance characteristics and the product life of the discharge lamp, thereby extending the product life of the discharge lamp. The purpose is to extend the usable period and reduce the maintenance cost.

  In order to solve the above-described problem, a projector device according to claim 1 includes a discharge lamp as a light source, a reflector in which the discharge lamp is housed, an inner surface is mirror-finished, and an opening for light irradiation is formed. A cooling fan for sending cooling air into the reflector, a duct formed with a cooling air inlet for guiding the cooling air generated by the cooling fan into the reflector, and the cooling air inlet A cooling air guide plate that is attached and guides the cooling air toward the top surface of the discharge lamp.

  According to the first aspect of the present invention, the cooling air can be guided mainly to the upper surface of the discharge lamp by the cooling air guide plate regardless of the installation state of the projector device.

  According to a second aspect of the present invention, in the projector device according to the first aspect, the cooling air guide plate is rotatably provided at the cooling air inlet, and the cooling air guide plate is disposed in the duct. A locking portion for restricting the rotation range is provided.

  According to the second aspect of the present invention, the cooling air guide plate is rotatable, and when installed on the ceiling, the cooling air guide plate is closer to the cooling fan than when the cooling air guide plate is installed stationary. Therefore, the cooling air can be guided to the upper surface of the discharge lamp in both cases where the projector apparatus is installed stationary and ceiling mounted.

  According to a third aspect of the present invention, in the projector device according to the first aspect, in the duct, the cooling air guide plate is urged toward the back side of the surface of the cooling air guide plate where the cooling air collides. An elastic body and a locking portion provided on the back side of the surface of the cooling air guide plate on which the cooling air collides are provided.

  According to the third aspect of the present invention, in the case of stationary installation, the cooling air guide plate is urged toward the locking portion by the elastic body, so the cooling air guide plate is urged toward the locking portion. Compared to the case where the cooling air is not provided, the cooling air guide plate is not rattled by the cooling air, and the cooling air can be stably guided to the upper surface of the discharge lamp.

  According to a fourth aspect of the present invention, in the projector device according to the third aspect of the present invention, an opening formed in a surface of the duct facing the surface provided with the cooling air inlet, and the cooling air guide plate from the opening. And a ceiling hanger for installation on a ceiling surface provided with a protruding portion that is pushed in between the locking portions.

  According to the fourth aspect of the present invention, in the case of ceiling installation, the cooling air guide plate is inclined in the direction of the cooling fan by the protrusion provided on the ceiling suspension metal fitting, compared to the case of stationary installation. Therefore, even in the case of ceiling installation, the cooling air guide plate can guide the cooling air to the upper surface of the discharge lamp.

  According to the fourth aspect of the invention, the cooling air can be stably guided to the upper surface of the discharge lamp.

  According to a fifth aspect of the present invention, in the projector device according to the first aspect of the present invention, a concave portion is provided for receiving the leading end portion of the cooling air guide plate and is movable so as to rotate the cooling air guide plate. It is characterized by having a slide knob.

  According to the fifth aspect of the present invention, since the inclination angle of the cooling air guide plate can be adjusted by adjusting the slide knob, the cooling air can be used in both cases of stationary installation and ceiling installation. The inclination angle of the guide plate can be formed so that the cooling air can be guided to the upper surface of the discharge lamp.

  According to a sixth aspect of the present invention, in the projector device according to any one of the first to fifth aspects, the cooling air guide plate is inclined toward the cooling fan side, and is inclined when the projector is suspended from a ceiling. The angle is larger than the inclination angle in the case of stationary installation.

  With such an inclination angle, the cooling air can be blown onto the upper surface of the discharge lamp in any installation state.

  According to the first aspect of the present invention, since the cooling air can be blown mainly on the upper surface of the discharge lamp regardless of the installation state of the projector device, it is possible to prevent the lower portion of the discharge lamp from being excessively cooled. The discharge lamp can be efficiently cooled, and the temperature of the upper and lower surfaces of the discharge lamp during lighting can be kept within the standard value range. Therefore, it is possible to extend the product life of the discharge lamp, extend the usable period of the projector device, and reduce the maintenance cost while preventing deterioration of the luminance characteristics and product life of the discharge lamp.

  According to the invention described in claim 2, the angle at which the cooling air guide plate provided so as to be freely rotatable can guide the cooling air to the upper surface of the discharge lamp by the locking portion in both cases of the stationary installation and the ceiling installation. Therefore, the cooling air is blown to the upper surface of the discharge lamp in any installation state, and the discharge lamp is efficiently cooled while preventing the lower surface of the discharge lamp from being excessively cooled. be able to.

  According to the invention described in claim 3, in the case of stationary installation, it is possible to stably blow cooling air on the upper surface of the discharge lamp, and the discharge lamp can be efficiently cooled.

  According to the invention described in claim 4, even in the case of ceiling installation, the discharge lamp can be stably sprayed on the upper surface, and the discharge lamp can be efficiently cooled.

  According to the invention described in claim 5, by adjusting the slide knob, the cooling air can be stably blown on the upper part of the discharge lamp in both cases of the stationary installation and the ceiling-mounted installation. Can be cooled.

  According to the sixth aspect of the present invention, cooling air can be efficiently blown onto the upper surface of the discharge lamp in any installation state.

  A first embodiment of the present invention will be described below with reference to the drawings. However, the scope of the invention is not limited to the illustrated examples.

  FIG. 1 is a top sectional view of the projector device 1, and FIG. 2 is a side sectional view of the projector device 1.

  The projector apparatus 1 is provided with a case 2 and a power supply board 3 for controlling the entire projector apparatus 1 with a power supply attached therein. A light source lamp 4 controlled by the power supply board 3 is provided near the center of the case 2, and in the traveling direction of the light emitted from the light source lamp 4, a color for converting the light into RGB colors. A wheel 5 is arranged. A lens unit 6 for projecting an image is arranged in the traveling direction of the light transmitted through the color wheel 5. In addition, the projector apparatus 1 has a sirocco fan 7 that flows cooling air into the light source lamp 4 to cool the light source lamp 4, and wind that has been flown into the light source lamp 4 by the sirocco fan 7 from within the projector apparatus 1. An axial fan 8 for discharging is provided.

  FIG. 3 is a schematic side sectional view of the vicinity of the light source lamp 4 when the projector apparatus 1 is grounded in a stationary state. A light source lamp 4 is accommodated in a lamp housing (not shown), and the light source lamp 4 is provided with a reflector 10. A light irradiation opening 11 is provided on the color wheel 5 side of the reflector 10, and the reflector 10 is hemispherical and mirror-finished on the inner surface. In addition, a discharge lamp housing opening 12 is provided at the base of the reflector 10, and the discharge lamp 13 is housed so that the light emitting part is located in the reflector 10 from the discharge lamp housing opening 12.

  A lamp holding member 14 is attached to the light irradiation opening 11 so as to cover the outer peripheral surface of the edge of the light irradiation opening 11 in order to hold the light source lamp 4 in a lamp housing (not shown). On the inner peripheral edge of the opening 15 on the reflector 10 side of the lamp holding member 14, a projecting portion 16 projecting inward is integrally formed. A plate-shaped explosion-proof glass 19 is disposed in the opening 15 on the reflector 10 side of the lamp holding member 14 so as to close the opening 15 on the reflector 10 side of the lamp holding member 14. The explosion-proof glass 19 has such a strength that the explosion-proof glass 19 is not broken even by a blast generated when the discharge lamp 13 breaks or breaks, and the fragments are scattered, and transmits light emitted from the light source lamp 4. It is formed with the material which has.

  Further, both ends of the lamp holding member 14 are open, and a duct 20 is provided for sending cooling air into the reflector 10 formed integrally with the lamp holding member 14. A cooling air inlet 21 for sending cooling air into the reflector 10 is provided on the upper surface of the duct 20. A cooling air guide plate 22 is rotatably provided on the cooling air inlet 21 on the axial fan 8 side. On the inner surface of the duct 20, a locking portion 23 that restricts the rotation range of the cooling air guide plate 22 is provided on the back side of the surface of the cooling air guide plate 22 on which the cooling air collides. The locking portion 23 includes protrusions 24 and 25. The protrusion 24 forming the locking portion 23 is disposed at a position where the cooling air guide plate 22 is locked in a state where the cooling air guide plate 22 is inclined toward the color wheel 5 to restrict the rotation, and the protrusion 25 is more cooled than the protrusion 24. The guide plate 22 is further arranged to restrict the rotation on the color wheel 5 side. In this way, the cooling air guide plate 22 is locked in a state inclined to the color wheel 5 side, and the cooling air blown from the sirocco fan 7 can be guided to the wall surface of the reflector 10 above the discharge lamp 13. It is like that.

  The locking portion 23 may be any location in the duct 20 as long as it can regulate the rotation of the cooling air guide plate 22 toward the axial fan 8 side. Moreover, there is no restriction | limiting about the positional relationship of the protrusion 24 and the protrusion 25 which form the latching | locking part 23. FIG.

  The end of the duct 20 on the lens unit 6 side is connected to a sirocco fan 7 provided in the reflector 10 for cooling the discharge lamp 13, and the sirocco fan 7 is supplied with air for supplying air. A vent 26 is provided.

  In addition, the cooling fan used for cooling the discharge lamp 13 in the present invention is not limited to the sirocco fan 7, and the discharge lamp 13 can be appropriately cooled and can be stored in the projector device 1. There are no restrictions on the type of the product.

  Next, the operation of the first embodiment will be described.

  First, the case where the projector apparatus 1 is set in a stationary state will be described with reference to FIG.

  When the projector device 1 is driven, the discharge lamp 13 is turned on, and the light emitted from the discharge lamp 13 is collected in the reflector 10, passes through the explosion-proof glass 19 and is irradiated on the color wheel 5. The light converted into RGB light by the color wheel 5 is applied to the lens unit 6. Then, an image is irradiated from the lens unit 6 onto the screen or the like.

  Simultaneously, the sirocco fan 7 starts to be driven simultaneously with the light emission of the discharge lamp 13, and the cooling air A is blown into the duct 20 after intake from the air supply port 26.

  The cooling air A sent into the duct 20 flows through the duct 20, collides with the cooling air guide plate 22 whose rotation is restricted by the protrusion 24 of the locking portion 23, and is guided to the cooling air inlet 21 side. .

  The cooling air A that has passed through the cooling air inlet 21 collides with the vicinity of the upper surfaces of the lamp holding member 14 and the reflector 10 and is then blown onto the upper surface of the discharge lamp 13 to mainly cool the upper surface of the discharge lamp 13. Cooling air that cools the discharge lamp 13 and has heat is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted to the outside of the projector device 1.

  Next, the case where the projector apparatus 1 is suspended from the ground will be described with reference to FIG. When the projector apparatus 1 is driven in the same manner as in the above-described stationary grounding, the sirocco fan 7 starts to be driven in addition to the discharge lamp 13 and the like, and the cooling air B is blown into the duct 20 after being sucked from the air supply port 26. .

  The cooling air B sent from the sirocco fan 7 into the duct 20 flows through the duct 20 and collides with the cooling air guide plate 22. Here, the cooling air guide plate 22 is rotated by its own weight when it is changed from the stationary installation state to the ceiling installation state, and is locked by the protrusion 25 of the locking portion 23. Therefore, it locks in the state inclined to the color wheel 5 side rather than the case where it is locked by the protrusion 24.

  Therefore, the cooling air B is guided mainly in the direction of the upper surface of the discharge lamp 13. Then, the cooling air B blown to the discharge lamp 13 mainly cools the upper surface of the discharge lamp 13. Cooling air B that has cooled the discharge lamp 13 and has heat is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted to the outside of the projector apparatus 1.

  This is compared with a projector device that is not provided with a cooling air guide plate. The maximum temperature of the standard value of the upper surface of the discharge lamp 13 used here is 1030 ° C. or less, and the standard value of the lower surface is in the range of 900 ° C. ± 20 ° C.

  When the projector apparatus 1 not provided with the cooling air guide plate is driven when it is installed stationary as shown in FIG. 9, the temperature of the upper surface of the discharge lamp 13 is 980.7 ° C., and the temperature of the lower surface is 915.5 ° C. Both were within the range of the standard value. However, as shown in FIG. 10, in the case of ceiling installation, the temperature of the upper surface of the discharge lamp 13 was 1091.4 ° C., and the temperature of the lower surface was 864.3 ° C. As described above, the conventional projector apparatus 1 shown in FIGS. 9 and 10 without the cooling air guide plate does not satisfy the standard value in the case of the ceiling installation.

  On the other hand, when the projector apparatus 1 according to the present embodiment provided with the cooling air guide plate 22 is driven when installed stationary as shown in FIG. 3, the temperature of the upper surface of the discharge lamp 13 is 980. The temperature of 7 ° C and the lower surface was 915.5 ° C, both of which were within the range of the standard values. 4, the temperature of the upper surface of the discharge lamp 13 was 1004.0 ° C., and the temperature of the lower surface was 895.0 ° C. Thus, it is clear that the projector apparatus 1 according to the present embodiment provided with the cooling air guide plate 22 satisfies the standard value of the discharge lamp in both the stationary installation and the ceiling installation, and the discharge lamp 13 It is clear that can be effectively cooled.

  As described above, according to the first embodiment, the cooling air is blown mainly on the upper surface of the discharge lamp 13 regardless of the installation state of the projector device 1, and the lower portion of the discharge lamp 13 is excessively cooled. Can be prevented.

  Then, the discharge lamp 13 is efficiently cooled, the temperature of the upper surface and the lower surface of the discharge lamp 13 during lighting is kept within the standard value range, and the deterioration of the discharge lamp luminance characteristics and the product life are prevented. The product life of the discharge lamp can be extended, the usable period of the projector device 1 can be extended, and the maintenance cost can be reduced.

  Next, a second embodiment of the present invention will be described. However, the second embodiment will be described only with respect to differences from the first embodiment described above, and the description of the same configuration as the first embodiment will be omitted.

  As shown in FIG. 5, a plate-like cooling air guide plate 22 is rotatably provided at the lamp side edge of the cooling air inlet 21 of the projector device, and the cooling air inlet 21 in the duct 20 is provided. A locking portion 29 that is a protrusion that restricts the rotation of the cooling air guide plate 22 toward the axial fan 8 is provided on the surface opposite to the formed surface. In the duct 20, an elastic body holding portion 30 for hooking one end of the elastic body is provided further on the axial fan 8 side than the locking portion 29. One end of a spring 31 is hooked on the elastic body holding portion 30, the other end of the spring 31 is attached to the cooling air guide plate 22, and the cooling air guide plate 22 is urged in the direction of the axial flow fan 8. Even in this case, the cooling air guide plate 22 is locked in an inclined state toward the color wheel 5 so that the cooling air blown from the sirocco fan 7 is guided to the wall surface of the reflector 10 above the discharge lamp 13. It has become.

  In the present embodiment, a spring is used as the elastic body, but rubber or the like may be used as long as it is an elastic body that can urge the cooling air guide plate 22 and press it against the engaging portion 29.

  Further, as shown in FIG. 6, a protrusion insertion port 32 is provided on the surface of the duct 20 facing the surface on which the cooling air inlet 21 is provided. A projection insertion port 34 is also provided in the case 33 of the projector device so as to penetrate the projection insertion port 32. Note that a lamp housing (not shown) is also provided with a projection insertion port so that a projection 40 described later penetrates from the projection insertion port 34 provided in the case to the projection insertion port 32 provided in the duct 20. .

  When the projector apparatus is suspended from a ceiling, for example, as shown in FIG. 6, a ceiling bracket 35 is screwed to the ceiling surface 35 with screws 39, 39. The projector case is screwed to the ceiling mount 36 by screws 39, 39...

  The ceiling mount 36 is provided with a projection insertion port 34 and a projection 40 to be inserted into the projection insertion port 32.

  Next, the operation of the present embodiment will be described. First, the case where the projector apparatus is set in a stationary state will be described with reference to FIG.

  As in the case of the first embodiment, when the projector device is driven, the sirocco fan 7 starts to be driven in addition to the discharge lamp 13 and the like, and the cooling air C is blown into the duct 20 after sucking from the air supply port 26. .

  The cooling air C sent from the sirocco fan 7 into the duct 20 flows through the duct 20, collides with the cooling air guide plate 22, and is guided to the cooling air inlet 21 side.

  The cooling air C that has passed through the cooling air inlet 21 collides with the vicinity of the upper surfaces of the lamp holding member 14 and the reflector 10 and is then blown onto the upper surface of the discharge lamp 13 to mainly cool the upper surface of the discharge lamp 13. Cooling air that cools the discharge lamp 13 and has heat is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted to the outside of the projector apparatus.

  Next, a case where the projector apparatus is suspended from the ground will be described with reference to FIG. In this case as well, when the projector device is driven, the sirocco fan 7 starts to be driven in addition to the discharge lamp 13 and the like, and the cooling air D is blown into the duct 20 after intake from the air supply port 26.

  The cooling air D sent from the sirocco fan 7 into the duct 20 flows through the duct 20 and collides with the cooling air guide plate 22. Here, in the case of ceiling installation, the end of the projection provided on the projection insertion port 34 and the ceiling mounting bracket 36 inserted from the projection insertion port 32 is inserted into the duct 20 and the cooling wind guide plate is inserted. An end portion of the projection 40 is inserted between the pressure 22 and the cooling air guide plate 30 being pressed 30. Therefore, the cooling air guide plate 22 is pushed toward the color wheel 5 by the protrusion 40 and is inclined toward the color wheel 5 as compared with the case where the protrusion 40 is not inserted.

  As a result, the cooling air D blown from the sirocco fan 7 is guided mainly in the direction of the upper surface of the discharge lamp 13. The cooling air D blown to the discharge lamp 13 cools the discharge lamp 13. Cooling air D that cools the discharge lamp 13 and has heat is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted to the outside of the projector apparatus.

  Thus, according to the invention concerning the second embodiment, it becomes possible to stabilize the cooling air guide plate 22 and efficiently cool the discharge lamp 13.

  Next, a third embodiment of the present invention will be described. However, the third embodiment will be described only with respect to differences from the first embodiment described above, and the description of the same configurations as those of the first embodiment described above will be omitted.

  As shown in FIG. 7, a plate-shaped cooling air guide plate 22 is rotatably provided at the edge of the cooling air inlet 21 of the projector device on the axial fan 8 side. A slit 42 is provided in the case 41 of the projector device (not shown) so as to penetrate the cooling air inlet 21. A slide knob 43 provided with a recess at the tip end that moves along the slit 42 is attached to the slit 42. The tip of the slide knob 43 is positioned inside the projector device, and the tip of the cooling air guide plate 22 is received in the recess. The concave portion of the slide knob 43 is formed wider than the width of the received cooling air guide plate 22, and the cooling air guide plate 22 can be rotated within a predetermined range by moving the slide knob 43. ing. The cooling air guide plate 22 is inclined to the color wheel 5 side.

  A lamp housing (not shown) is provided with a slit or an opening so that the tip of the slide knob 43 receives the cooling wind guide plate 22 and the slide knob 43 can move along the slit 42.

  Next, the operation of the present embodiment will be described. First, the case where the projector apparatus is set in a stationary state will be described with reference to FIG.

  When the projector device is driven as in the case of the first embodiment, the sirocco fan 7 starts to be driven in addition to the discharge lamp 13 and the like, and the cooling air E is blown into the duct 20 after sucking from the air supply port.

  The cooling air E sent from the sirocco fan 7 into the duct 20 flows through the duct 20 and collides with the cooling air guide plate 22 and is guided to the cooling air inlet 21 side.

  The cooling air E that has passed through the cooling air inlet 21 collides with the vicinity of the upper surfaces of the lamp holding member 14 and the reflector 10 and is then blown onto the upper surface of the discharge lamp 13 to mainly cool the upper surface of the discharge lamp 13. Cooling air that cools the discharge lamp 13 and has heat is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted to the outside of the projector apparatus.

  Next, a case where the projector apparatus is suspended from the ground will be described with reference to FIG. In this case as well, when the projector device is driven, the sirocco fan 7 starts to be driven in addition to the discharge lamp 13 and the like, and the cooling air F is blown into the duct 20 after intake from the air supply port 26. The cooling air F sent from the sirocco fan 7 into the duct 20 flows through the duct 20 and collides with the cooling air guide plate 22. As shown in FIG. 8, in the case of ceiling installation, the slide knob 43 is moved to the color wheel 5 side and the cooling air guide plate 22 is inclined to the color wheel side compared to the case of stationary installation. Therefore, the cooling air F is guided mainly in the direction of the upper surface of the discharge lamp 13. The cooling air F blown to the discharge lamp 13 cools the discharge lamp 13. Cooling air F heated by cooling the discharge lamp 13 is sucked from the discharge lamp housing opening 12 by the axial fan 8 and then exhausted outside the projector apparatus.

  As described above, according to the third embodiment of the present invention, the cooling knob 43 is adjusted to stabilize the cooling air at the upper part of the discharge lamp 13 in both cases of stationary installation and ceiling installation. And can be efficiently cooled by spraying.

It is a top surface sectional view of the projector device concerning a first embodiment. It is side surface sectional drawing of the projector apparatus concerning 1st embodiment. It is side surface sectional drawing of the lamp vicinity for the light source at the time of installing the projector apparatus concerning 1st embodiment stationary. It is side surface sectional drawing of the lamp | ramp for light sources at the time of carrying out the ceiling installation of the projector apparatus concerning 1st embodiment. It is side surface sectional drawing of the lamp | ramp for light sources at the time of installing the projector apparatus concerning 2nd embodiment stationary. It is side surface sectional drawing of the lamp | ramp for light sources at the time of installing the projector apparatus concerning 2nd embodiment on a ceiling. It is side surface sectional drawing of the lamp | ramp for light sources at the time of deferring and installing the projector apparatus concerning 3rd embodiment. It is side surface sectional drawing of the lamp | ramp for light sources at the time of carrying out the ceiling installation of the projector apparatus concerning 3rd embodiment. It is side surface sectional drawing of the lamp | ramp for light sources at the time of installing the conventional projector apparatus stationary. It is side surface sectional drawing near the lamp | ramp for light sources at the time of installing the conventional projector apparatus on a ceiling.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Projector apparatus 4 Lamp 7 Sirocco fan 10 Reflector 11 Light irradiation opening 12 Discharge lamp storage opening 13 Discharge lamp 20 Duct 21 Cooling air inlet 22 Cooling air guide plate 23 Locking part 29 Locking part 30 Elastic body holding part 31 Spring 32 Projection insertion port 36 Ceiling mount bracket 40 Projection

Claims (6)

A discharge lamp as a light source;
A reflector in which the discharge lamp is housed, an inner surface is mirror-finished, and an opening for light irradiation is formed;
A cooling fan for sending cooling air into the reflector;
A duct formed with a cooling air inlet for guiding cooling air generated by the cooling fan into the reflector;
A cooling air guide plate attached to the cooling air inlet for guiding the cooling air toward the upper surface of the discharge lamp;
A projector apparatus comprising: The cooling air guide plate is rotatably provided at the cooling air inlet,
The projector device according to claim 1, wherein a locking portion that restricts a rotation range of the cooling air guide plate is provided in the duct. In the duct,
An elastic body for biasing the cooling air guide plate toward the back side of the surface of the cooling air guide plate on which the cooling air collides,
A locking portion provided on the back side of the surface of the cooling air guide plate on which the cooling air collides,
The projector device according to claim 1, further comprising: An opening formed in a surface facing the surface provided with the cooling air inlet in the duct;
From the opening, a ceiling hanger for installation on a ceiling surface provided with a projection that is pushed between the cooling air guide plate and the locking portion,
The projector device according to claim 3, further comprising:   2. The projector according to claim 1, further comprising a slide knob that is provided with a concave portion that receives a front end portion of the cooling air guide plate and that is movable so as to rotate the cooling air guide plate. apparatus.   6. The cooling air guide plate according to claim 1, wherein the cooling air guide plate is inclined toward the cooling fan, and an inclination angle in the case of ceiling suspension installation is larger than an inclination angle in the case of stationary installation. The projector device according to item.

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