JP2006091697A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector wherein a part in proximity to a lamp in an enclosure is prevented from having a high temperature locally. <P>SOLUTION: The projector includes; a lamp 6 stored in an enclosure 2; a lamp cover 11 surrounding the lamp 6; a heat dissipating member 15 disposed apart from the lamp cover 11 and outside the lamp cover 11; and a heat transport means 13 comprising heat conduction member 13 having heat receiving parts 13a and 13b, which are attached to the lamp cover 11 and receive heat generated by the lamp 6, and transmitting the heat received by the heat receiving parts 13a and 13b to the heat dissipating member 15, a heat pipe 32, etc. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector that enlarges and displays an image on a projection object such as a screen, and more particularly to a projector that suppresses overheating of a housing temperature when the projector is thinned.

The projector includes a lamp and an optical unit as main components inside the casing. In general, the light output of a lamp used in a projector is large, and accordingly, the amount of heat generated is large and cooling is necessary. Conventionally, an air cooling structure using forced convection by a fan is often employed. For example, see Patent Document 1.
Japanese Patent Laid-Open No. 10-23355

  Among the projector parts, the heat generated by the lamp is remarkably large, and in recent years, the output of the lamp has been increasing due to the demand for bright display images. It tends to get hot. In particular, resin materials with excellent UV resistance and heat resistance are often used for lamp covers provided to prevent lamp peripheral parts from being deteriorated by UV rays and heat emitted from the lamps, and resin materials with low thermal conductivity are used for heat. Difficult to diffuse, and this also tends to concentrate heat on the housing near the lamp. In such a situation, if the thinning of the casing is promoted, the lamp is positioned immediately inside the casing, and the casing temperature will increase further.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a projector that can suppress a portion of a housing located near a lamp from being locally heated.

The present invention employs the following configuration in order to solve the above problems.
That is, the projector according to the present invention includes a lamp housed in a housing, a lamp cover surrounding the lamp, a heat dissipating member that is spaced from the lamp cover and disposed outside the lamp cover, and a heat receiving member that receives heat generated by the lamp. And a heat transport means for transmitting heat received by the heat receiving portion to the heat radiating member.

  Here, the heat transport means functions as a heat transport path for diffusing the heat generated by the lamp from the lamp arrangement location. That is, the heat generated by the lamp is transmitted to the heat radiating member via the heat transport means, and is radiated from the heat radiating member to the air around the heat radiating member.

  The heat dissipating member is disposed at a lower temperature than the lamp disposition location, and heat transfer from the lamp side to the heat dissipating member occurs via the heat transport means due to a temperature difference between the lamp disposition location and the heat dissipating member disposition location. . For example, the heat dissipating member is disposed in a position that does not overlap the lamp in a plan view. Alternatively, the heat dissipating member is not limited to being disposed inside the housing, and a part of the housing may be configured by the heat dissipating member itself by exposing a part of the heat dissipating member (for example, fins for heat dissipation) to the outside of the housing. Good.

  Further, if a plate-like or sheet-like heat conducting member having a relatively large surface area is used as the heat transporting means, a heat diffusion effect due to heat radiation from the heat transporting means itself can be obtained. When it is desired to obtain a heat transport capacity larger than the heat conduction in the solid, it is effective to use a heat pipe or heat lane utilizing heat transport by phase change.

  Further, if the heat receiving portion of the heat transport means is not directly attached to the lamp but attached to the lamp cover, the replacement work of the consumable lamp is not hindered.

  In order to suppress heat transfer from the lamp to the housing, it is also effective to interpose a heat insulating material between the inner portion of the housing and the lamp.

  Further, a fan may be provided for air cooling of the lamp and the heat radiating member. If a cross-flow fan having a suction port facing the lamp and the heat radiating member is used as the fan, high temperature air is sucked and exhausted. Since it is possible to avoid the motor of the fan being located on the path, it is possible to suppress a reduction in motor life due to heat. Further, since the cross flow fan can obtain a wide uniform wind as compared with the axial fan, the heat diffused over a wide range can be exhausted by only one fan without using a plurality of fans.

  Also, as the air cooling fan for the lamp and the heat radiating member, a fan having a cross flow fan part and a sirocco fan part that are rotated together by the same motor and have different suction directions is used. If one of them sucks the air inside the lamp cover and the other sucks the air around the heat dissipation member, the arrangement of the lamp and the heat dissipation member is more than that when a fan with only one suction direction is used. The degree of freedom in layout can be increased.

  According to the projector of the present invention, since the heat generated by the lamp is diffused by using the heat transport means and the heat radiating member, the heat concentration at the lamp arrangement location is suppressed, and the portion located near the lamp in the housing is locally It is possible to prevent the temperature from becoming high. As a result, local overheating of the surface temperature of the casing near the lamp can be suppressed even if the height of the casing is reduced to reduce the size of the projector.

[First Embodiment]
FIG. 1 is an external perspective view of a projector 1 according to an embodiment of the present invention. The projector 1 has a substantially rectangular parallelepiped housing 2 made of resin or metal material, and the housing 2 accommodates the lamp 6 and the optical unit 8 shown in FIGS. For example, a metal halide lamp, a high-pressure mercury lamp, a halogen lamp, or a xenon lamp can be used as the lamp 6. The optical unit 8 includes an integrator, a color separation dichroic mirror, liquid crystal panels 23a to 23c, a color composition dichroic prism 21, a projection lens 4, and the like. A window hole 3 is opened in the front portion 2 a of the housing 2, and the projection lens 4 faces the outside of the housing from the window hole 3.

  The light emitted from the lamp 6 is guided to the optical unit 8 and is separated into red, green and blue by the color separation dichroic mirror, and is transmitted through the liquid crystal panels 23a to 23c forming the respective color images. Color synthesis is performed by the synthesis dichroic prism 21 to form a color image. The color image is enlarged and projected onto a projection object such as a screen via the projection lens 4.

  As shown in FIG. 4, the reflector 7 surrounds the arc tube 26 of the lamp 6. The reflector 7 is an elliptical mirror or a parabolic mirror in which a light-reflective film is attached to a glass member having heat resistance and ultraviolet resistance. The reflector 7 efficiently collects light emitted from the arc tube 26 and guides it to the optical unit 8 side. To do.

  Referring to FIGS. 2 and 3 again, the lamp 6 is disposed in the lamp cover 11. The lamp cover 11 is made of a resin or a metal material and has a function of preventing deterioration of parts around the lamp 6 due to heat and ultraviolet rays emitted from the lamp 6. The lamp cover 11 surrounds the lamp 6 so as not to block the front of the lamp 6 which is the light emission direction of the lamp 6 to the optical unit 8 and the rear of the lamp 6 which is the opposite direction. That is, the upper plate portion 11 a of the lamp cover 11 covers the upper side of the lamp 6, and two side plate portions 11 b and 11 c provided integrally and substantially perpendicular to the upper plate portion 11 a cover the sides of the lamp 6. The lamp cover 11 is not in contact with the lamp 6.

  A heat conducting member 13 is attached to the lamp cover 11 by a method such as screwing, bonding, or welding. The heat conducting member 13 includes a first heat receiving portion 13a, a second heat receiving portion 13b, and a heat radiating member attaching portion 13c. The heat conducting member 13 is made of, for example, a metal or alloy having excellent heat conductivity such as copper, copper alloy, aluminum, aluminum alloy, magnesium, magnesium alloy.

  The first heat receiving portion 13a and the heat radiating member mounting portion 13c form a flat plate having a rectangular planar shape, and the second heat receiving portion 13b is provided substantially perpendicular to the flat plate at a substantially central portion in the longitudinal direction of the flat plate. ing. The second heat receiving portion 13b is provided along the short direction of the flat plate. The first heat receiving portion 13a and the second heat receiving portion 13b are in direct contact with the outer surface of the upper plate portion 11a of the lamp cover 11 and the outer surface of the side plate portion 1b, respectively. Or you may interpose the adhesive agent, heat conductive grease, heat conductive sheet, etc. which have heat conductivity.

  The heat radiating member mounting portion 13c extends in the direction opposite to the first heat receiving portion 13a with the second heat receiving portion 13b as a boundary. The heat radiating member 15 is attached to the lower surface of the heat radiating member attaching part 13c by methods, such as screwing, adhesion | attachment, and welding, for example. The heat radiating member 15 and the second heat receiving portion 13b are not in contact with each other, and a space is formed between them.

  The heat radiating member 15 is a so-called plate heat sink having a base 15a (see FIG. 3) and a plurality of plate-like fins 15b provided substantially perpendicular to the base 15a. In addition, not only a plate type heat sink but a pin type heat sink or a tower type heat sink may be used. The heat dissipation member 15 is made of, for example, a metal or an alloy having excellent thermal conductivity such as copper, copper alloy, aluminum, aluminum alloy, magnesium, magnesium alloy. The base 15a is in direct contact with the lower surface of the heat dissipation member mounting portion 13c. Or you may interpose the adhesive agent, heat conductive grease, heat conductive sheet, etc. which have heat conductivity.

  The heat radiating member 15 is disposed in a space where the lower surface of the heat radiating member mounting portion 13c and the outer surface of the second heat receiving portion 13b face each other, and the amount of space formed between the outer surface of the second heat receiving portion 13b, It is located away from the lamp cover 11. Further, the heat radiating member 15 is accommodated within the height dimension of the side plate portions 11 a and 11 b of the lamp cover 11 and does not protrude above the heat conducting member 13. Therefore, it is not necessary to secure an extra space in the housing 2 in the height direction for the heat radiating member 15, and this does not hinder the projector 1 from being thinned.

  The heat conducting member 13 described above functions as a heat transport means that receives the heat generated by the lamp 6 at the first and second heat receiving portions 13 a and 13 b via the lamp cover 11 and transmits the heat to the heat radiating member 15.

  Further, as such a heat transport means, a heat conductive sheet 63 shown in FIG. 14 may be used. The heat conductive sheet 63 is, for example, a graphite sheet, an aluminum foil, a copper foil, or the like, and the portions attached to the upper plate portion 11a and the side plate portion 11b of the lamp cover 11 function as heat receiving portions. A portion continuing from the lower end of the portion adhered to the side plate portion 11b in the heat conductive sheet 63 is laid on the base 28 provided on the inner surface of the bottom of the housing, and the heat radiating member 15 is disposed thereon. 2 and 3, the heat dissipating member 15 is upside down, the base 15a is mounted on the heat conductive sheet 63, and the fins 15b face upward from the base 15a.

  Referring again to FIGS. 2 and 3, the fan 18 is disposed so as to face the rear part of the lamp 6 (the part facing the direction opposite to the light emitting direction to the optical unit 8). Fans 17 are arranged so as to face each other. The fans 17 and 18 are so-called axial fans in which motors 17b and 18b are positioned at the rotation centers and blades 17a and 18a are provided around the motors 17b and 18b, respectively.

  Each component described above is housed in the housing 2. In such a projector 1, the heat generated by the lamp 6 is transmitted to the first and second heat receiving portions 13 a and 13 b of the heat conducting member 13 through the lamp cover 11. The heat of the first and second heat receiving portions 13a and 13b moves through the heat conducting member 13 to the heat radiating member mounting portion 13c on the lower temperature side than the first and second heat receiving portions 13a and 13b. The heat is transmitted to the heat radiating member 15 attached to the member attaching portion 13c, and is radiated from the fins 15b of the heat radiating member 15 to the surrounding air.

  That is, in this embodiment, the heat generated by the lamp 6 is diffused through the heat conducting member 13 to the heat dissipating member 15 provided at a position away from the lamp 6, thereby increasing the temperature at the place where the lamp 6 is disposed. Can be suppressed. Further, since the heat conducting member 13 has a shape in which two flat plates are combined in a T shape and has a relatively large surface area, a sufficient heat radiation effect can be obtained from the heat conducting member 13 itself. Contributes to the suppression of temperature rise at the location. By the above, in the housing | casing 2, it can prevent that the part (for example, part right above the lamp | ramp 6) located near the lamp | ramp 6 becomes high temperature locally. Therefore, it is not necessary to secure a large gap between the casing 2 and the lamp 6 inside thereof, and the projector 1 can be thinned.

  The air around the lamp 6, whose temperature has been increased by receiving heat radiated from the lamp 6, is sucked in by the fan 18, and the housing 2 through a number of slit-like exhaust ports 5 provided on the side of the housing 2 shown in FIG. 1. Exhausted outside. The air around the heat radiating member 15 whose temperature has been increased by receiving heat radiated from the heat radiating member 15 is sucked by the fan 17 and is similarly discharged from the exhaust port 5 to the outside of the housing 2.

  Here, since the fan 18 is an axial fan, it is inevitable that high-temperature air sucked from the lamp 6 side hits the motor 18b, and this may lead to a decrease in fan life. However, in the present embodiment, the heat from the lamp 6 is diffused to the heat dissipating member 15 located away from the lamp 6 to suppress the temperature increase at the place where the lamp 6 is arranged. The rise in the temperature of the air sucked in can be suppressed, the heat load applied to the motor 18b can be reduced, and the lifetime reduction of the fan 18 can be suppressed.

  Instead of providing the fan 18, the heat conducting member 13 may be extended to the rear side of the lamp 6 and a heat radiating member may be attached to the extended portion. Further, the heat conducting member 13 may be extended in the direction opposite to the direction in which the heat dissipating member attaching portion 13c extends, and the heat dissipating member may be attached to that portion. The fan 18 is not necessarily required when the lamp 6 can be suppressed to a desired temperature only by the heat dissipation effect of the heat dissipation member 15 and the heat conducting member 13. Of course, the fan 17 for cooling the heat radiating member 15 is not necessarily required. As described above, in the present embodiment, it is not always necessary to provide a fan near the lamp 6, which improves the degree of freedom of component arrangement layout.

  Further, the lamp 6 is a consumable item and must be replaced when the service life is reached. Here, in the present embodiment, the first and second heat receiving portions 13 a and 13 b of the heat conducting member 13 are both attached to the lamp cover 11 and are not in contact with the lamp 6. Therefore, the lamp can be replaced without performing the troublesome work of removing or attaching the heat conducting member 13 to the lamp 6.

[Second Embodiment]
Next, a second embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  When the housing 2 is made thinner with the miniaturization of the projector 1, the space above the lamp 6 is narrowed inside the housing 2, and the lamp 6 is positioned immediately inside the housing 2. The temperature of the part facing the lamp 6 in the body 2 tends to be high. Therefore, in the present embodiment, as shown in FIG. 4, a heat insulating material 24 is interposed between the inner portion of the upper plate portion 2 b of the housing 2 and the upper plate portion 11 a of the lamp cover 11. Since the heat insulating material 24 is located on the opposite side of the surface in contact with the lamp cover 11 in the heat conducting member 13, it does not hinder heat conduction from the lamp cover 11 to the heat conducting member 13. Further, a heat insulating material 25 is also interposed between the bottom plate portion 2 c of the housing 2 and the lamp base 28. As shown in FIG. 3, the heat insulating materials 24 and 25 are formed in a plate shape or a sheet shape.

  As the heat insulating materials 24 and 25, for example, glass wool, hard urethane foam, a vacuum heat insulating material, a heat insulating coating material, or the like can be used. Here, the vacuum heat insulating material has a core material made of a porous material such as a powder material such as silica powder or a fiber material, and the core material is covered with a laminate film, and the inside is evacuated so that the heat insulating performance of the core material is achieved. In addition, it has a structure that is less likely to transmit heat. Moreover, as a heat insulation paint used for a heat insulation coating material, what mix | blended ceramic particle | grains and the hollow ceramic bead with the emulsion of urethane or an acrylic can be mentioned as an example.

  As described above, according to the present embodiment, in addition to the heat diffusion effect from the lamp arrangement place using the heat conducting member 13 and the heat radiating member 15, the heat from the lamp 6 to the housing 2 is further increased by the heat insulating materials 24 and 25. Since the transmission is suppressed, it is possible to further suppress the temperature rise in the portion of the housing 2 near the lamp. This is particularly effective when the casing 2 is thinned and the spatial distance between the casing 2 and the lamp 6 is small.

[Third Embodiment]
Next, a third embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 5, a heat pipe 32 having a heat transport capability several tens of times that of copper, for example, is used as the heat transport means. A heat receiving portion 31 is provided on one end side of the heat pipe 32. The heat receiving portion 31 is made of, for example, a metal or alloy having excellent thermal conductivity, such as copper, copper alloy, aluminum, aluminum alloy, or magnesium alloy. The heat receiving portion 31 is attached in direct contact with the outer surface of the upper plate portion 11a of the lamp cover 11 or with an adhesive having thermal conductivity, thermal conductive grease, a thermal conductive sheet, or the like interposed therebetween.

  A heat radiating member 33 is provided on the other end side of the heat pipe 32. The heat radiating member 33 is made of, for example, a metal or alloy having excellent thermal conductivity, such as copper, copper alloy, aluminum, aluminum alloy, and magnesium alloy. The heat dissipating member 33 and the side plate portion 11b of the lamp cover 11 are not in contact with each other, and a gap is formed between them. The heat dissipating member 33 is located away from the lamp cover 11 by the amount of the gap. The heat dissipating member 33 is accommodated within the height dimension of the side plate portion 11b of the lamp cover 11. Therefore, it is not necessary to secure an extra space in the height direction in the housing 2 for the heat dissipating member 33. It will not interfere with the reduction in thickness.

  Heat generated by the lamp 6 is transmitted to the heat receiving portion 31 through the lamp cover 11. The heat of the heat receiving part 31 is transmitted to the heat radiating member 33 located on the lower temperature side than the heat receiving part 31 through the heat pipe 32 and is radiated from the heat radiating member 33 to the surrounding air.

  That is, the heat generated by the lamp 6 is diffused through the heat receiving portion 31 and the heat pipe 32 to the heat radiating member 33 provided at a position away from the lamp 6, thereby suppressing the temperature rise at the place where the lamp 6 is disposed. Can do. As a result, in the housing 2, a portion located near the lamp 6 (for example, a portion directly above the lamp 6) can be prevented from being locally heated. Therefore, it is not necessary to secure a large gap between the casing 2 and the lamp 6 inside thereof, and the projector 1 can be thinned.

  The air around the lamp 6, whose temperature has been increased by receiving heat radiated from the lamp 6, is sucked in by the fan 18, and the housing 2 through a number of slit-like exhaust ports 5 provided on the side of the housing 2 shown in FIG. 1. Exhausted outside. The air around the heat radiating member 33 whose temperature has been increased by receiving heat radiated from the heat radiating member 33 is sucked by the fan 17 and is also discharged from the exhaust port 5 to the outside of the housing 2.

  Also in the present embodiment, the heat receiving portion 31 is attached to the lamp cover 11 and is not in contact with the lamp 6, so that it does not hinder lamp replacement.

  In addition, you may use the heat lane which has the heat transport capability more than a heat pipe. In the heat lane, the hydraulic fluid undergoes a phase change due to heat absorption in the heat receiving part 31, the liquid phase vibrates due to nucleate boiling that transports latent heat using the movement of steam, and this vibration is used to transport sensible heat. The heat of the lamp 6 is diffused into the heat radiating member 33.

[Fourth Embodiment]
Next, a fourth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  In this embodiment, as shown in FIG. 12, a cross flow fan 37 is used instead of the axial fan. The casing 37b of the cross flow fan 37 accommodates a plurality of elongated blades 37c that are integrally provided so as to surround a rotation axis indicated by a one-dot chain line. The cross flow fan 37 is disposed with its suction port directed toward the lamp 6 and the heat radiating member 15, and the motor 37 a that rotates the blade 37 c does not face the lamp 6 and the heat radiating member 15.

  The cross flow fan 37 sucks in air that has been heated by receiving heat radiated from the lamp 6, the heat radiating member 15, and the power source 35, and exhausts the air toward an exhaust port provided on the side of the housing 2. Since the air cooling of the lamp 6, the heat radiating member 15, the power source 35, and the like can be performed by one cross flow fan 27, the number of fans can be reduced. Further, the cross flow fan 27 can obtain a wide wind with a uniform wind speed distribution, and widely diffuses the heat of the lamp 6 to portions other than the place where the lamp 6 is disposed by using a heat transport means and a heat radiating member. Suitable for

  In the case of the axial fan 18 used in the embodiment shown in FIGS. 2 and 3, it is inevitable that the high-temperature air sucked from the lamp 6 side hits the motor 18b located at the center of the blade 18a. This may lead to a decrease in fan life. On the other hand, in the cross flow fan 37, the motor 37a is not located in the blade | wing 37c. Therefore, the motor 37a can be positioned at a position away from a heat source such as the lamp 6 without being positioned on a path for sucking in high-temperature air, and a decrease in the service life is suppressed without applying a thermal load to the motor 37a. it can.

  Further, as the casing 2 is made thinner, the height of the fan needs to be reduced. However, when the axial flow fan is reduced in size, the motor diameter is relatively larger than the blade diameter and the air volume is reduced. There is a tendency. However, with the axial flow fan and the cross flow fan having the same height, the cross flow fan can obtain a larger air volume, and even if the cross flow fan is downsized, the air volume necessary for exhausting the lamp heat can be secured.

[Fifth Embodiment]
Next, a fifth embodiment of the present invention will be described. In addition, the same code | symbol is attached | subjected to the same component as the said 1st Embodiment, and the detailed description is abbreviate | omitted.

  In the present embodiment, as shown in FIG. 6, as an air cooling fan for the lamp 6 and the heat radiating member 15, a cross flow fan unit 41 and a sirocco fan unit 51 that are rotated together by the same motor 43 and have different suction directions. Is used.

  The cross flow fan unit 41 and the sirocco fan unit 51 are housed in a common casing 45 as shown in FIGS. The cross flow fan unit 41 includes a plurality of elongated blades 42 that are integrally provided around the rotation axis. The sirocco fan unit 51 includes a plurality of blades 52 that are integrally provided so as to surround the same rotation axis as the cross flow fan unit 41 and are shorter than the blades 42 of the cross flow fan unit 41. A disc-shaped partition plate 44 is provided between the cross flow fan unit 41 and the sirocco fan unit 51, and separates the cross flow fan unit 41 and the sirocco fan unit 51.

  In the casing 45, the side surface on the side where the cross flow fan part 41 and the sirocco fan part 51 exhaust is opened as shown in FIG. An air conditioning member 49 is provided on the upper side of the side surface along the longitudinal direction to restrict the flow of exhaust air from the cross flow fan unit 41 and the sirocco fan unit 51 upward.

  In the casing 45, the side surface on the side where the cross flow fan portion 41 sucks air is opened as shown in FIG. On the side surface, the portion 48 corresponding to the sirocco fan portion 51 is closed.

  In the casing 45, a suction port 47 of the sirocco fan unit 51 is formed on an end side surface 46 on the sirocco fan unit 51 side. A motor 43 is provided on the end side surface opposite to the end side surface 46. The motor 43 is provided outside the casing 45. The rotation shaft of the motor 43 is connected to the cross flow fan unit 41 and the sirocco fan unit 51, and the cross flow fan unit 41 and the sirocco fan unit 51 are rotated together by driving the motor 43.

  The fan 50 configured as described above is disposed behind the lamp 6 and the lamp cover 11 as shown in FIG. The suction port of the cross flow fan unit 41 is directed into the lamp cover 11. The suction port 47 of the sirocco fan part 51 is directed to the space behind the heat radiating member 15.

  The air in the lamp cover 11 is sucked into the cross flow fan unit 41 and is exhausted toward the exhaust port 5 (see FIG. 1) provided on the side of the housing 2, and the air is discharged from the exhaust port 5 to the outside of the housing 2. Exhausted. The air around the heat radiating member 15 is sucked into the sirocco fan 51 together with the air in the space behind the heat radiating member 15. Since the sirocco fan 51 is closed by the casing 45 (including the portion 48 shown in FIG. 11) and the partition plate 44 except for the suction port 47 and the exhaust direction, the air sucked from the suction port 47 is Similarly to the cross flow fan unit 41, the air is exhausted toward the exhaust port 5 of the housing 2, and is exhausted from the exhaust port 5 to the outside of the housing 2.

  In the present embodiment, heat is radiated from the suction port 47 formed on the end side surface 46 of the fan 50 without facing the fan 50 to the heat radiating member 15 as in the crossflow fan 67 of the fourth embodiment shown in FIG. Since the air around the member 15 is sucked in, the length can be shortened as compared with the cross flow fan 67 of the fourth embodiment, and the installation space is not required accordingly. This leads to miniaturization of the projector 1.

  Further, if a fan that realizes suction from two different directions as in this embodiment is used, the degree of freedom in the layout of the lamp 6 and the heat dissipation member 15 increases. For example, in the example shown in FIG. 13, the heat radiating member 15 is disposed at the left rear of the housing 2, and the fan 61 faces the suction port of the sirocco fan unit 55 to the heat radiating member 15, and the suction port of the cross flow fan unit 54. Are arranged facing the side of the lamp 6.

  The sirocco fan portion 55 is a partition plate 57 provided between the casing of the fan 61 and the cross flow fan portion 54 except for the suction port facing the heat radiating member 15 and the exhaust port facing the back side of the housing 2. Therefore, the air around the heat radiation member 15 sucked from the suction port is exhausted toward the exhaust port provided on the back side of the housing 2, and the air is discharged from the exhaust port to the outside of the housing 2. Exhausted.

  The cross flow fan unit 54 sucks air around the lamp 6 and air around the power source 35 from the suction port facing the lamp 6 and exhausts it toward the exhaust port provided on the back side of the housing 2. The exhaust air is exhausted from the exhaust port of the housing 2 to the outside of the housing 2.

  Since the motor 43 of the fan 50 and the motor 56 of the fan 61 described above are not configured in the blades, the motors 43 and 56 are not positioned on the path for sucking air around the heat source. It is possible to suppress a decrease in the service life without applying a heat load to the motors 43 and 56.

  In addition, as shown in FIG. 7, in the sirocco fan part 51, the portion 38 on the exhaust direction side of the cross flow fan part 41 was closed, and the part facing the lamp 6 side was opened and sucked from the suction port 47. Air may be blown toward the lamp cover 11. In addition to the air around the heat radiating member 15, cooler air is sucked from the wide area where the suction port 47 faces from the suction port 47. Then, the lamp 6 is cooled by air.

  As mentioned above, although each embodiment of this invention was described, of course, this invention is not limited to these, A various deformation | transformation is possible based on the technical idea of this invention.

  Each of the embodiments described above is not limited to being implemented alone, and can be combined with other embodiments. For example, the heat insulating material shown in the second embodiment can be applied to other embodiments. Moreover, the structure which combined the heat transport means shown in 3rd Embodiment and the crossflow fan 37 shown in 4th Embodiment may be sufficient.

  Alternatively, as shown in FIG. 8, the heat transport means of the third embodiment and the fan 50 of the fifth embodiment may be combined. In this case, the exhaust direction of the sirocco fan unit 51 is the same as the exhaust direction of the cross flow fan unit 41. However, even if the air sucked by the sirocco fan unit 51 is blown toward the lamp 6 as shown in FIG. Good.

  The heat radiating members 15 and 33 are not limited to being disposed inside the housing 2, and the heat radiating members 15 and 33 may constitute a part of the housing 2. In that case, if the heat dissipation members 15 and 33 have fins, the fins are exposed to the outside of the housing 2.

1 is an external perspective view of a projector according to an embodiment of the invention. It is a perspective view of a lamp vicinity part concerning a 1st embodiment of the present invention. It is the perspective view seen from the direction different from FIG. It is sectional drawing of the lamp | ramp vicinity part which concerns on the 2nd Embodiment of this invention. It is a perspective view of the lamp vicinity part which concerns on the 3rd Embodiment of this invention. It is a perspective view of the lamp vicinity part which concerns on the 5th Embodiment of this invention. FIG. 6 is a perspective view in which the exhaust direction of the sirocco fan portion is changed. It is a perspective view of the lamp vicinity part by the modification of this invention. FIG. 8 is a perspective view in which the exhaust direction of the sirocco fan portion is changed. FIG. 9 is an enlarged perspective view of the fan shown in FIGS. It is the perspective view seen from the opposite side of FIG. It is a schematic plan view of the lamp | ramp vicinity part which concerns on the 4th Embodiment of this invention. It is a schematic plan view of the lamp vicinity part by the modification of this invention. It is a schematic cross section of the lamp vicinity part by the modification of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... Projector, 2 ... Housing | casing, 4 ... Projection lens, 6 ... Lamp, 7 ... Reflector, 8 ... Optical unit, 11 ... Lamp cover, 13 ... Heat conduction member, 13a, 13b ... Heat receiving part, 15 ... Heat radiation member, 24, 25 ... heat insulating material, 31 ... heat receiving part, 32 ... heat pipe, 33 ... heat radiating member, 35 ... power source, 37 ... cross flow fan, 37a ... motor, 41 ... cross flow fan part, 43 ... motor, 50 ... fan , 51 ... Sirocco fan part, 54 ... Cross flow fan part, 55 ... Sirocco fan part, 56 ... Motor, 61 ... Fan, 63 ... Heat conduction sheet.

Claims (5)

A lamp housed in a housing;
A lamp cover surrounding the lamp;
A heat dissipating member spaced from the lamp cover and disposed outside the lamp cover;
A heat receiving portion that receives heat generated by the lamp, and heat transport means that transfers heat received by the heat receiving portion to the heat radiating member;
A projector comprising: The projector according to claim 1, wherein the heat receiving unit is attached to the lamp cover. The projector according to claim 1, wherein a heat insulating material is interposed between an inner portion of the housing and the lamp. The projector according to claim 1, further comprising a cross flow fan arranged with a suction port facing the lamp and the heat dissipation member. A fan having a cross flow fan portion and a sirocco fan portion that are rotated together by the same motor and have different suction directions from each other,
2. The projector according to claim 1, wherein one of the cross-flow fan unit and the sirocco fan unit sucks air in the lamp cover, and the other sucks air around the heat dissipation member.

Images