Cooling device

Abstract

To ventilate a space having other devices, walls, and the like depending on an arrangement method in a projector.SOLUTION: A cooling device includes: a casing that houses a cooling object and has a first surface and a second surface that are adjacent mutually; an air flow path that is provided in the casing and circulates air for cooling a cooling object; a rotating unit that has a third surface and can switch the direction of the third surface relative to the casing; a connection terminal disposed on the third surface; and an exhaust port that is disposed on the third surface and discharges air circulating in the air flow path. The rotating unit can be switched to either a first state in which a normal line of the third surface is parallel with a normal line of the first surface or a second state in which the normal line of the third surface is parallel with a normal line of the second surface.SELECTED DRAWING: Figure 9

Description

[Technical field]

[0001] The present disclosure relates to a cooling device. [Background technology]

[0002] There is known an image projection device that exhausts heat inside the device to the outside. The projector described in Patent Document 1 has an exhaust fan, an exhaust port, and a heat exhaust direction control means. The exhaust fan exhausts air inside the projector to the outside. The exhaust port is an opening that is provided on the exhaust surface of the projector and exhausts air. The heat exhaust direction control means is a means for changing the exhaust direction of the air exhausted from the exhaust port. The heat exhaust direction control means can change the angle of the exhaust direction with respect to the exhaust surface. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] JP 2017-90787 A Summary of the Invention [Problem to be solved by the invention]

[0004] The projector described in Patent Document 1, depending on the installation method, has a reduced cooling capacity when ventilating a space in which other devices, walls, etc. are provided. [Means for solving the problem]

[0005] The cooling device includes a housing that accommodates an object to be cooled and has a first surface and a second surface adjacent to each other, an airflow path provided inside the housing and circulating air to cool the object to be cooled, a rotating unit that has a third surface and is capable of switching the orientation of the third surface relative to the housing, a connection terminal arranged on the third surface, and an exhaust port arranged on the third surface and discharging the air circulating through the airflow path, and the rotating unit is switchable between a first state in which a normal to the third surface is parallel to a normal to the first surface, and a second state in which the normal to the third surface is parallel to a normal to the second surface. [Brief description of the drawings]

[0006] [Figure 1] FIG. 1 illustrates an external configuration of a projector. [Diagram 2] FIG. 1 illustrates an external configuration of a projector. [Diagram 3] FIG. 1 illustrates an external configuration of a projector. [Figure 4] FIG. 1 is a diagram showing a schematic configuration of an image projection device. [Diagram 5] FIG. 1 illustrates an external configuration of a projector. [Figure 6] FIG. 1 illustrates an external configuration of a projector. [Figure 7] FIG. [Figure 8] 8 is a side view of the rotation unit as viewed in the A direction in FIG. 7. [Figure 9] FIG. 1 is a diagram showing a schematic configuration of a projector. [Figure 10] FIG. 1 is a diagram showing a schematic configuration of a projector. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0007] FIG. 1 shows the external configuration of a projector 10. FIG. 1 shows the external configuration of the projector 10 in a perspective view. The projector 10 corresponds to an example of a cooling device. FIG. 1 shows a perspective view of the projector 10 installed on an installation surface, as viewed from the front. The projector 10 includes an exterior housing 20, a rotation unit 25, and an image projection device 30. The exterior housing 20 is an example of a housing.

[0008] The exterior housing 20 accommodates the image projection device 30. The exterior housing 20 shown in FIG. 1 is rectangular. The shape of the exterior housing 20 is not limited to a rectangle. The shape of the exterior housing 20 can be set appropriately. The exterior housing 20 shown in FIG. 1 has an upper surface 20a, a lower surface 20b, a front surface 20c, a first side surface 20d, a rear surface 20e, and a second side surface 20f. The upper surface 20a is a surface parallel or approximately parallel to the installation surface. The lower surface 20b is a surface facing the installation surface. The front surface 20c is a surface facing the projection surface onto which the image projection device 30 projects image light. The first side surface 20d and the second side surface 20f are surfaces adjacent to the front surface 20c and are perpendicular or approximately perpendicular to the installation surface. The rear surface 20e is a surface adjacent to the first side surface 20d and the second side surface 20f and is a surface perpendicular or approximately perpendicular to the installation surface. The names of each surface are indicated based on the installation posture in which the bottom surface 20b faces the installation surface, but do not indicate the up-down relationship of each surface. As an example, the projector 10 may be disposed so that the bottom surface 20b faces the +Z direction. The installation posture of the projector 10 is set appropriately. The exterior housing 20 corresponds to an example of a housing. The back surface 20e is an example of a first surface. The first side surface 20d is an example of a second surface.

[0009] A number of figures including FIG. 1 show an XYZ coordinate system. The Z axis is an axis perpendicular to the installation surface. The +Z direction is a direction from the lower surface 20b to the upper surface 20a. The -Z direction is a direction from the upper surface 20a to the lower surface 20b. The X axis is an axis parallel to the installation surface. The +X direction is a direction from the rear surface 20e to the front surface 20c. The -X direction is a direction from the front surface 20c to the rear surface 20e. The Y axis is an axis parallel to the installation surface and perpendicular to the X axis. The +Y direction is a direction from the second side surface 20f to the first side surface 20d. The -Y direction is a direction from the first side surface 20d to the second side surface 20f. The first side surface 20d is the right side surface when the projector 10 is viewed from the front surface 20c side. The second side surface 20f is the left side surface when the projector 10 is viewed from the front surface 20c side.

[0010] 1, an indicator 21, a part of the image projection device 30, and an air intake 40 are arranged on the front surface 20c of the projector 10. Image light is projected onto a projection surface from the front surface 20c by the image projection device 30. The configuration of the image projection device 30 will be described later.

[0011] The indicator 21 indicates the operating state of the projector 10. As an example, the indicator 21 is composed of a plurality of LED (Light Emitting Diode) lamps. The indicator 21 indicates that the power of the projector 10 is ON, etc. The rotation unit 25 is incorporated in the exterior housing 20. The rotation unit 25 is configured to be rotatable about an axis 26. The axis 26 extends along the Z axis. The rotation unit 25 is rotatable with respect to the exterior housing 20.

[0012] The air intake port 40 is an opening that draws air into the inside of the projector 10. As an example, the air intake port 40 is composed of a plurality of slits. The configuration of the air intake port 40 is not limited as long as it is capable of drawing air into the inside of the projector 10. The air intake port 40 shown in FIG. 1 is disposed on the front surface 20c, but is not limited to this. The position of the air intake port 40 is set appropriately. The air intake port 40 corresponds to an example of a vent.

[0013] An exhaust port 50 is arranged on the first side surface 20d. The exhaust port 50 exhausts air circulating inside the projector 10. As an example, the exhaust port 50 is composed of a plurality of slits. The configuration of the exhaust port 50 is not limited as long as it is a configuration that can exhaust air inside the projector 10. In the projector 10 shown in FIG. 1, a plurality of exhaust ports 50 are arranged on the first side surface 20d. The number and arrangement positions of the exhaust ports 50 are set appropriately. The exhaust port 50 corresponds to an example of an air vent.

[0014] Fig. 2 shows the external configuration of the projector 10. Fig. 2 is a perspective view showing the external configuration of the projector 10. Fig. 2 shows a perspective view of the projector 10 installed on an installation surface, as seen from behind.

[0015] An operation panel 23 is disposed on the upper surface 20a of the projector 10. The operation panel 23 accepts input operations from a user. The operation panel 23 is composed of a plurality of input buttons and the like. The operation panel 23 may have a display. The display displays setting information and the like to the user.

[0016] A plurality of exhaust ports 50 are arranged on the rear surface 20e shown in FIG. 2. The number and positions of the exhaust ports 50 arranged on the rear surface 20e are set appropriately. The configuration of the exhaust ports 50 arranged on the rear surface 20e may be the same as or different from the configuration of the exhaust ports 50 arranged on the first side surface 20d. The rotation unit 25 is located between the first side surface 20d and the rear surface 20e. The rotation unit 25 is located at the intersection of the first side surface 20d and the rear surface 20e.

[0017] The rotating unit 25 has a first unit surface 27A and a second unit surface 27B. The first unit surface 27A is an example of a third surface. The rotating unit 25 has a connection unit 60 and a power supply unit 70. The connection unit 60 and the power supply unit 70 are provided on the first unit surface 27A of the rotating unit 25. Furthermore, a plurality of exhaust ports 50 are formed on the first unit surface 27A of the rotating unit 25. The configuration of the exhaust ports 50 formed on the rotating unit 25 may be the same as or different from the exhaust ports 50 disposed on the first side surface 20d. The exhaust ports 50 formed on the rotating unit 25 are identified as exhaust ports 50A.

[0018] The connection unit 60 is connected to an external device for communication. The connection unit 60 has one or more connectors 61 that connect the projector 10 to the external device. The connection unit 60 may have a wireless communication circuit that wirelessly connects to the external device. In FIG. 2, the first unit surface 27A of the rotation unit 25 faces the -X direction. The connector 61 is a terminal that connects to the external device by wire. The connector 61 inputs image data and the like from the external device. Alternatively, the connector 61 outputs setting data and the like to the external device. FIG. 2 shows a plurality of connectors 61. The connector 61 is composed of a USB (Universal Serial Bus) terminal, an HDMI (High-Definition Multimedia Interface) terminal, an optical digital cable terminal, a display port terminal, and the like. Here, HDMI is a registered trademark. The type and number of the connectors 61 included in the connection unit 60 are set as appropriate.

[0019] The power supply unit 70 supplies power to the projector 10. The power supply unit 70 includes a power supply terminal 71 that connects to a power cable 211, which will be described later. The power supply unit 70 may be disposed on the same surface as the connection unit 60, or may be disposed on a different surface. As shown in FIG. 3, the rotation unit 25 is configured to be rotatable about an axis 26. In FIG. 3, a first unit surface 27A of the rotation unit 25 faces in the +Y direction. The rotation unit 25 is switchable about the axis 26 between a state in which the first unit surface 27A faces in the +Y direction and a state in which the first unit surface 27A shown in FIG. 2 faces in the -X direction.

[0020] The state change between a state in which the first unit surface 27A faces the -X direction and a state in which the first unit surface 27A faces the +Y direction is realized by rotating the rotation unit 25 around the axis 26. The -X direction is called the rear, and the +Y direction is called the side. The state in which the first unit surface 27A faces the -X direction is also expressed as the rotation unit 25 facing rearward. In addition, the state in which the first unit surface 27A faces the +Y direction is also expressed as the rotation unit 25 facing sideways. Therefore, the rotation unit 25 can be switched between facing rearward and facing sideways.

[0021] As shown in Fig. 2, when the rotating unit 25 faces backward, the exhaust port 50A, the connection unit 60, and the power supply unit 70 also face backward. That is, when the rotating unit 25 faces backward, the exhaust port 50A, the connection unit 60, and the power supply unit 70 face in the -X direction. Also, as shown in Fig. 3, when the rotating unit 25 faces to the side, the exhaust port 50A, the connection unit 60, and the power supply unit 70 also face to the side. That is, when the rotating unit 25 faces to the side, the exhaust port 50A, the connection unit 60, and the power supply unit 70 face in the +Y direction.

[0022] The state in which the first unit surface 27A faces the -X direction is a state in which the normal of the first unit surface 27A is parallel to the normal of the rear surface 20e of the exterior housing 20. The state in which the normal of the first unit surface 27A is parallel to the normal of the rear surface 20e of the exterior housing 20 is called the first state. In other words, the first state is a state in which the first unit surface 27A is along the rear surface 20e. The state in which the first unit surface 27A faces the +Y direction is a state in which the normal of the first unit surface 27A is parallel to the normal of the first side surface 20d of the exterior housing 20. The state in which the normal of the first unit surface 27A is parallel to the normal of the first side surface 20d of the exterior housing 20 is called the second state. In other words, the second state is a state in which the first unit surface 27A is along the first side surface 20d.

[0023] 4 shows a schematic configuration of the image projection device 30. The image projection device 30 is housed in an exterior housing 20. The image projection device 30 forms image light according to image information input from an external device. The image projection device 30 enlarges and projects the image light onto a projection surface. The image projection device 30 includes a light source unit 31, a homogenizing optical system 32, a color separation optical system 33, a relay optical system 34, an image forming unit 35, an optical component housing 36, and a projection optical unit 37. The image projection device 30 corresponds to an example of a cooling target.

[0024] The light source unit 31 emits light to the homogenizing optical system 32. As an example, the light source unit 31 has a solid-state light source and a wavelength conversion element. The solid-state light source emits blue light which is excitation light. The wavelength conversion element converts at least a part of the blue light emitted from the solid-state light source into fluorescence containing green light and red light. The light source unit 31 may have a light source lamp such as an extra-high pressure mercury lamp. The light source unit 31 may have a light-emitting element which individually emits blue light, green light and red light.

[0025] The homogenizing optical system 32 homogenizes the light emitted from the light source unit 31. The homogenized light passes through a color separation optical system 33 and a relay optical system 34, and illuminates a modulation area of ​​the transmissive liquid crystal panel 353. The homogenizing optical system 32 includes a first lens array 321, a second lens array 322, a polarization conversion element 323, and a superimposing lens 324.

[0026] The first lens array 321 splits the light emitted from the light source unit 31 into a plurality of partial light beams. The first lens array 321 is composed of a plurality of first lenses. The first lenses are not shown. The plurality of first lenses are arranged in an array on one plane.

[0027] The second lens array 322 is composed of a plurality of second lenses corresponding to the plurality of first lenses. The second lenses are not shown. The plurality of second lenses are arranged in an array on one plane.

[0028] The polarization conversion element 323 converts the light into linearly polarized light having a specific vibration direction. The polarization conversion element 323 converts the other linearly polarized light into one linearly polarized light. As an example, the polarization conversion element 323 converts P-polarized light into S-polarized light.

[0029] The superimposing lens 324 collects the partial light beams from the polarization conversion element 323. The superimposing lens 324 superimposes the collected partial light beams near the transmissive liquid crystal panel 353. The first lens array 321, the second lens array 322, and the superimposing lens 324 configure an integrator optical system that makes the in-plane light intensity distribution of the light uniform.

[0030] The color separation optical system 33 separates the light incident from the homogenization optical system 32 into red light, green light, and blue light. The color separation optical system 33 includes a first dichroic mirror 331, a second dichroic mirror 332, and a first reflecting mirror 333.

[0031] The first dichroic mirror 331 separates the light into blue light and a mixture of red light and green light. The first dichroic mirror 331 reflects the blue light. The first dichroic mirror 331 transmits the red light and the green light.

[0032] The second dichroic mirror 332 separates the mixed light of red light and green light into red light and green light. The second dichroic mirror 332 reflects the green light. The second dichroic mirror 332 transmits the red light. The second dichroic mirror 332 reflects the green light toward the transmissive liquid crystal panel 353.

[0033] First reflecting mirror 333 reflects the blue light separated by first dichroic mirror 331. First reflecting mirror 333 is disposed in the optical path of the blue light. First reflecting mirror 333 reflects the blue light towards transmissive liquid crystal panel 353.

[0034] The relay optical system 34 is provided in the optical path of the red light. The optical path of the red light is longer than the optical paths of the blue light and the green light. The relay optical system 34 suppresses loss of the red light. The relay optical system 34 includes an incident side lens 341, a second reflecting mirror 342, a relay lens 343, and a third reflecting mirror 344.

[0035] Incident side lens 341 prevents optical loss of red light. Incident side lens 341 transmits the red light transmitted by second dichroic mirror 332. Incident side lens 341 is provided between second dichroic mirror 332 and second reflecting mirror 342.

[0036] Second reflecting mirror 342 reflects the red light that has passed through incident-side lens 341. Second reflecting mirror 342 reflects the red light toward relay lens 343. Second reflecting mirror 342 is provided between incident-side lens 341 and relay lens 343 on the optical path of the red light.

[0037] Relay lens 343 prevents optical loss of the red light. Relay lens 343 passes the red light reflected by second reflecting mirror 342. Relay lens 343 is provided between second reflecting mirror 342 and third reflecting mirror 344.

[0038] Third reflecting mirror 344 reflects the red light that has passed through relay lens 343. Third reflecting mirror 344 reflects the red light toward transmissive liquid crystal panel 353. Third reflecting mirror 344 is provided between relay lens 343 and transmissive liquid crystal panel 353 on the optical path of the red light.

[0039] The relay optical system 34 shown in Fig. 4 is provided on the optical path of the red light and guides the red light. The relay optical system 34 is not limited to the configuration shown in Fig. 4. The image projection device 30 may be configured such that the optical path of the blue light is longer than the optical paths of the red light and the green light. In this case, the relay optical system 34 may be configured to guide the blue light.

[0040] The image forming unit 35 modulates red light, green light, and blue light. The image forming unit 35 forms image light by combining the modulated red light, green light, and blue light. The image forming unit 35 has three field lenses 351, three incident side polarizing plates 352, three transmissive liquid crystal panels 353, three exit side polarizing plates 354, one color combining optical system 355, and an optical path shift module 356. The three field lenses 351, the three incident side polarizing plates 352, and the three transmissive liquid crystal panels 353 are provided corresponding to the incident red light, green light, and blue light, respectively.

[0041] Field lens 351 collimates the chief ray of incident light. Field lens 351 into which red light is incident collimates the chief ray of the red light. Field lens 351 into which green light is incident collimates the chief ray of the green light. Field lens 351 into which blue light is incident collimates the chief ray of the blue light.

[0042] Incident side polarizing plate 352 adjusts the polarization of each color light that has passed through field lens 351. Incident side polarizing plate 352 is provided between field lens 351 and transmissive liquid crystal panel 353.

[0043] The transmissive liquid crystal panel 353 modulates the light emitted from the light source unit 31 based on an image signal input from an external device. The transmissive liquid crystal panel 353 modulates the light incident from the incident side polarizing plate 352 according to the image signal. The transmissive liquid crystal panel 353 emits the modulated light. The three transmissive liquid crystal panels 353 are a red light transmissive liquid crystal panel 353R, a green light transmissive liquid crystal panel 353G, and a blue light transmissive liquid crystal panel 353B. The red light transmissive liquid crystal panel 353R modulates the red light incident from the incident side polarizing plate 352 according to the image signal. The red light transmissive liquid crystal panel 353R emits the modulated red light. The green light transmissive liquid crystal panel 353G modulates the green light incident from the incident side polarizing plate 352 according to the image signal. The green light transmissive liquid crystal panel 353G emits the modulated green light. The blue light transmissive liquid crystal panel 353B modulates, in accordance with an image signal, the blue light incident from the incident-side polarizing plate 352. The blue light transmissive liquid crystal panel 353B emits the modulated blue light.

[0044] The transmissive liquid crystal panel 353 has a plurality of pixels arranged along a first axis corresponding to the Y axis and a second axis corresponding to the Z axis. Depending on the aspect ratio of the projected image, the pixels corresponding to the aspect ratio are operated.

[0045] The color combining optical system 355 combines three color lights modulated by the blue light transmissive liquid crystal panel 353B, the green light transmissive liquid crystal panel 353G, and the red light transmissive liquid crystal panel 353R to form image light. The image light formed by the color combining optical system 355 is incident on the projection optical unit 37. The color combining optical system 355 shown in FIG. 4 is formed of a substantially rectangular parallelepiped cross dichroic prism. The color combining optical system 355 may be formed of a plurality of dichroic mirrors.

[0046] The light path shift module 356 shifts the optical path of the image light formed by the color synthesis optical system 355. The light path shift module 356 is disposed between the color synthesis optical system 355 and the projection optical unit 37. The light path shift module 356 increases the resolution of the projection image projected onto the projection surface by shifting the optical path of the image light. The light path shift module 356 has, as an example, two sets of actuators (not shown). The light path shift module 356 oscillates around two oscillation axes by the operation of the two sets of actuators. The two oscillation axes are perpendicular to each other. The actuator is composed of a magnet and a coil.

[0047] The optical component housing 36 accommodates therein the homogenizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35. The image projection device 30 is designed to have an optical axis Ax. The optical component housing 36 holds the homogenizing optical system 32, the color separation optical system 33, the relay optical system 34, and the image forming unit 35 at predetermined positions on the optical axis Ax. The light source unit 31 and the projection optical unit 37 are disposed at predetermined positions on the optical axis Ax.

[0048] The projection optical unit 37 projects the image light incident from the image forming unit 35 onto the projection surface. A part of the projection optical unit 37 is disposed so as to protrude from the front surface 20c. The projection optical unit 37 has a lens barrel 371. The lens barrel 371 houses, as an example, a plurality of lenses (not shown). The projection optical unit 37 is composed of a lens assembly having a plurality of lenses.

[0049] At least a part of the projection optical unit 37 may be configured to be detachable from the image projection device 30. When at least a part of the projection optical unit 37 is removed from the image projection device 30, the image projection device 30 including the projection optical unit 37 remaining in the image projection device 30 corresponds to an example of an optical device. When the entire projection optical unit 37 is removed, the image projection device 30 excluding the projection optical unit 37 corresponds to an example of an optical device. The image projection device 30 shown in FIG. 4 is configured to use a transmissive liquid crystal panel 353, but is not limited to this configuration. The image projection device 30 may be configured to use a reflective liquid crystal panel or to include one or more DMDs (Digital Micromirror Devices).

[0050] As shown in FIG. 5, an internal housing flow path 81 is provided inside the exterior housing 20. The internal housing flow path 81 is a path for circulating air. The internal housing flow path 81 circulates air sent from the air intake 40. The air circulating through the internal housing flow path 81 cools the entire image projection device 30, or the light source unit 31, the image forming unit 35, and the like included in the image projection device 30. As an example, the internal housing flow path 81 is configured as a duct through which air can flow. The configuration of the internal housing flow path 81 is not limited as long as it is configured so that air can flow. The internal housing flow path 81 corresponds to an example of an air flow path. An exhaust fan 85 is provided in the internal housing flow path 81.

[0051] When the exhaust fan 85 is driven, air outside the exterior housing 20 is sucked into the inside of the housing internal flow path 81 from the intake port 40. The air sucked into the inside of the housing internal flow path 81 from the intake port 40 is exhausted from the exhaust port 50A by the exhaust fan 85. The exhaust port 50A is provided in the rotating unit 25. The rotating unit 25 has an internal unit flow path 87 that is connected to the internal housing flow path 81. The exhaust port 50A is connected to the internal unit flow path 87. The air sucked into the inside of the housing internal flow path 81 is exhausted from the exhaust port 50A to the outside of the exterior housing 20 through the internal unit flow path 87 of the rotating unit 25. In FIG. 5, the rotating unit 25 is facing backward. Therefore, the air sucked into the inside of the housing internal flow path 81 is exhausted from the exhaust port 50A to the rear of the exterior housing 20 through the internal unit flow path 87 of the rotating unit 25. That is, when the rotary unit 25 faces backward, the air drawn into the inside of the housing internal flow path 81 passes through the unit internal flow path 87 and is exhausted from the exhaust port 50A in the −X direction of the exterior housing 20.

[0052] 6, when the rotating unit 25 faces sideways, the exhaust port 50A faces sideways, i.e., in the +Y direction. Therefore, when the rotating unit 25 faces sideways, the air sucked into the inside of the housing internal flow path 81 is discharged from the exhaust port 50A to the side of the exterior housing 20 via the unit internal flow path 87 of the rotating unit 25. In other words, when the rotating unit 25 faces sideways, the air sucked into the inside of the housing internal flow path 81 is discharged from the exhaust port 50A to the +Y direction of the exterior housing 20 via the unit internal flow path 87.

[0053] As shown in FIG. 7, the rotation unit 25 has a unit body 28 and two rotation shafts 29. FIG. 7 is a front view of the rotation unit 25 with the first unit surface 27A facing the front. The unit body 28 has a box-shaped structure. The two rotation shafts 29 are provided in the unit body 28. The two rotation shafts 29 protrude from the unit body 28. Of the two rotation shafts 29, the rotation shaft 29A is provided on the upper surface of the unit body 28. The rotation shaft 29A protrudes in the +Z direction from the upper surface of the unit body 28. Of the two rotation shafts 29, the rotation shaft 29B is provided on the bottom surface of the unit body 28. The rotation shaft 29B protrudes in the -Z direction from the bottom surface of the unit body 28. The two rotation shafts 29 are each inserted into a bearing portion of the exterior housing 20 (not shown). As a result, the rotation unit 25 is rotatably supported by the exterior housing 20 via the two rotation shafts 29. The rotation of the rotation unit 25 can be performed by various driving methods, such as by power from a motor or manually.

[0054] The unit body 28 is provided with an exhaust port 50A, a connection unit 60, and a power supply unit 70. The exhaust port 50A communicates with an internal flow path 87 shown in FIG. 6. As shown in FIG. 7, the exhaust port 50A, the connector 61, and the power supply terminal 71 are disposed on the first unit surface 27A of the rotating unit 25. The connector 61 is located in the +Z direction of the power supply terminal 71. The exhaust port 50A is located in the +Z direction of the connector 61. As shown in FIG. 8, the rotating unit 25 includes a wiring path 155. The wiring path 155 is accommodated inside the unit body 28. The wiring path 155 extends inside the unit body 28 along the Z axis. The wiring path 155 connects the connection unit 60 and the power supply unit 70. The wiring path 155 is a path on which an internal power cable connected to the power supply terminal 71, an internal wiring cable connected to the connector 61, and the like can be disposed. The wiring path 155 is connected to an electric circuit of the projector 10 (not shown). The power supply terminal 71 is an example of a connection terminal. The connector 61 is an example of a connection terminal.

[0055] 9, a power cable 211 is connected to the power supply unit 70. A connection cable 201 is connected to the connection unit 60. The power cable 211 is connected to a power terminal 71 of the power supply unit 70. The connection cable 201 is connected to a connector 61 of the connection unit 60. The power cable 211 is connected to the power supply unit 70 in a direction perpendicular to the first unit surface 27A. The connection cable 201 is connected to the connection unit 60 in a direction perpendicular to the first unit surface 27A.

[0056] FIG. 9 illustrates a state in which the first unit surface 27A faces the -X direction. In a state in which the first unit surface 27A faces the -X direction, if there is a space in which the power cable 211 can be arranged in the -X direction of the first unit surface 27A, the power cable 211 can be connected to the power supply unit 70. That is, in a state in which the first unit surface 27A faces the -X direction, in order to connect the power cable 211 to the power supply unit 70, it is necessary to secure a space in which the power cable 211 can be arranged in the -X direction of the first unit surface 27A. Also, in a state in which the connection cable 201 can be arranged in the -X direction of the first unit surface 27A, the connection cable 201 can be connected to the connection unit 60. That is, in a state in which the first unit surface 27A faces the -X direction, in order to connect the connection cable 201 to the connection unit 60, it is necessary to secure a space in which the connection cable 201 can be arranged in the -X direction of the first unit surface 27A.

[0057] As shown in FIG. 10, in a state where the first unit surface 27A faces the +Y direction, if there is a space in which the power cable 211 can be arranged in the +Y direction of the first unit surface 27A, the power cable 211 can be connected to the power supply unit 70. In other words, in a state where the first unit surface 27A faces the +Y direction, in order to connect the power cable 211 to the power supply unit 70, it is necessary to secure a space in which the power cable 211 can be arranged in the +Y direction of the first unit surface 27A. Also, in a state where there is a space in which the connection cable 201 can be arranged in the +Y direction of the first unit surface 27A, the connection cable 201 can be connected to the connection unit 60. In other words, in a state where the first unit surface 27A faces the +Y direction, in order to connect the connection cable 201 to the connection unit 60, it is necessary to secure a space in which the connection cable 201 can be arranged in the +Y direction of the first unit surface 27A.

[0058] According to the projector 10, the first unit surface 27A of the rotating unit 25 can be selected to face backward or to face sideways. The orientation of the first unit surface 27A of the rotating unit 25 can be changed depending on the space in which the projector 10 is placed. This makes it easier to secure space for connecting the power cable 211 and the connection cable 201. This makes it easier to secure space in the -X direction of the first unit surface 27A or in the +Y direction of the first unit surface 27A. As a result, in the projector 10, the air flowing through the housing internal flow path 81 can be exhausted from the exhaust port 50A to a space in which no other device, wall, or the like is provided, so that a decrease in cooling capacity due to ventilation can be suppressed.

[0059] It is also possible to employ a configuration in which a sensor is added to the projector 10 to detect obstacles such as other devices or walls that exist behind or to the sides of the first unit surface 27A. The orientation of the first unit surface 27A can be changed based on the detection by the sensor of the presence of other devices or walls behind or to the sides of the first unit surface 27A. This makes it possible to automatically ensure a space for connecting the power cable 211 and the connection cable 201.

[0060] The following is a summary of this disclosure.

[0061] (Additional Note 1) A cooling device comprising: a housing for accommodating an object to be cooled and having a first surface and a second surface adjacent to each other; an airflow path provided inside the housing for circulating air to cool the object to be cooled; a rotating unit having a third surface and capable of switching the orientation of the third surface relative to the housing; a connection terminal arranged on the third surface; and an exhaust port arranged on the third surface for discharging the air circulating through the airflow path, wherein the rotating unit can be switched between a first state in which a normal to the third surface is parallel to a normal to the first surface, and a second state in which the normal to the third surface is parallel to a normal to the second surface. According to this cooling device, the direction in which air is exhausted from the exhaust port can be changed by switching the rotating unit between the first state and the second state, thereby preventing a decrease in the cooling capacity of the cooling device by discharging air toward a space that is not occupied by other devices or walls.

[0062] (Appendix 2) A cooling device as described in claim 1, comprising a sensor that detects an obstacle and a motor that changes the normal direction of the third surface of the rotating unit, and if the sensor detects the obstacle when the rotating unit is in the first state, the motor is used to switch the rotating unit from the first state to the second state. According to this cooling device, when an obstacle is detected by the sensor in the normal direction of the first surface, the rotation unit is operated by the motor so that a second normal direction different from the first normal direction is parallel to the normal direction of the third surface of the rotation unit, thereby switching the direction of exhausting air from the exhaust port to a direction in which no obstacle is detected. This allows the air to be exhausted toward a space where there are no other devices or walls, thereby preventing a decrease in the cooling capacity of the cooling device. [Explanation of symbols]

[0063] 10...projector, 20...exterior housing, 20a...upper surface, 20b...lower surface, 20c...front surface, 20d...first side surface, 20e...rear surface, 20f...second side surface, 21...indicator, 23...operation panel, 25...rotation unit, 26...axis, 27A...first unit surface, 27B...second unit surface, 28...unit body, 29...rotation axis, 29A...rotation axis, 29B...rotation axis, 30...image projection device, 31...light source unit, 32...uniformization optical system, 33...color separation optical system, 34...relay optical system, 35...image formation unit, 36...housing for optical components, 37...projection optical unit, 40...intake port, 50...exhaust port, 50A...exhaust port, 60...connection unit, 61...connector, 70...power supply unit, 71...power supply terminal, 81...flow path inside housing, 85...exhaust fan , 87...flow path within unit, 155...wiring path, 201...connection cable, 211...power cable, 321...first lens array, 322...second lens array, 323...polarization conversion element, 324...superimposing lens, 331...first dichroic mirror, 332...second dichroic mirror, 333...first reflecting mirror, 341...entrance side lens, 342...second reflecting mirror, 343...relay lens, 344...third reflecting mirror, 351...field lens, 352...entrance side polarizing plate, 353...transmissive liquid crystal panel, 353B...transmissive liquid crystal panel for blue light, 353G...transmissive liquid crystal panel for green light, 353R...transmissive liquid crystal panel for red light, 354...exit side polarizing plate, 355...color synthesis optical system, 356...optical path shift module, 371...lens barrel.

Claims

1. a housing that houses an object to be cooled and has a first surface and a second surface adjacent to each other; an airflow passage provided inside the housing for circulating air for cooling the cooling target; a rotation unit having a third surface and capable of switching an orientation of the third surface with respect to the housing; A connection terminal disposed on the third surface; an exhaust port disposed on the third surface and configured to exhaust the air flowing through the airflow passage; the rotation unit is switched between a first state in which a normal line to the third surface is parallel to a normal line to the first surface, and a second state in which a normal line to the third surface is parallel to a normal line to the second surface; Cooling device.

2. A sensor for detecting obstacles; a motor for changing a normal direction of the third surface of the rotation unit, When the sensor detects the obstacle while the rotation unit is in the first state, the rotation unit is switched from the first state to the second state using the motor. The cooling device according to claim 1 .

Images