JP2010134028A - Blower for electronic equipment and electronic equipment with the blower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To efficiently cool each of a plurality of cooling objects (electronic equipment or parts accompanying heat) when air from a cooling fan is made to flow in a plurality of channels. <P>SOLUTION: An air duct 30 includes: an intake part 37 taking in air from the cooling fan; a first exhaust hole 31 exhausting the air toward the first cooling object; a second exhaust hole 32 exhausting the air toward the second cooling object; a first channel 33 allowing the air to flow by changing an advancing direction of the air so that a flow of the air taken in from the intake part 37 may direct toward the first exhaust hole 31; a second channel 34 allowing the air to flow by changing the advancing direction of the air so that the flow of the air taken in from the intake part 37 may direct toward the second exhaust hole 32; and a partition plate partitioning the first channel 33 and the second channel 34. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a blower for an electronic device used for an electronic device such as a projection display device that projects an image on a screen or the like by projecting light, and an electronic device with a blower. More specifically, the present invention relates to a technique in which air from a cooling fan is allowed to flow through a plurality of flow paths to efficiently cool a plurality of objects to be cooled (electronic devices and components with heat).

  Conventionally, as an electronic apparatus, for example, a projection display device (liquid crystal projector or the like) is known. The projection display device includes a light source such as a lamp unit supported by a reflector, a PS conversion element that converts a polarization direction of light emitted from the light source, and a light valve that modulates light polarized by the PS conversion element. And a cross prism that color-synthesizes the light modulated by the light valve, and a projection lens that projects the light color-synthesized by the cross prism. The image projected from the projection lens is projected on a screen or the like.

Here, when using a projection display device, various optical components (PS conversion elements, cross prisms, etc.) are heated, so the optical components are cooled by the wind from the blower, and the optical components are limited. It is kept below the guaranteed temperature. And as a ventilation apparatus, it has the 1st flow path and the 2nd flow path which flow the wind for cooling, and sends the ventilation from one cooling fan to a light valve or a cross prism in a 1st flow path, and 2nd A technique is disclosed in which the flow is made to flow through a PS conversion element in a flow path (see, for example, Patent Document 1).
JP 2006-91143 A

  However, the technique of Patent Document 1 described above provides the second flow path on an extension line in the traveling direction of the wind flowing through the first flow path. A first exhaust hole and a second exhaust hole are formed in the first flow path and the second flow path, respectively, in a direction perpendicular to the wind traveling direction. For this reason, the wind flowing through the first flow path is hardly discharged from the first exhaust hole, but goes straight to the second flow path and is discharged from the second exhaust hole. As a result, there is a large difference in cooling efficiency between the light valve and the cross prism that are cooled by the air exhausted from the first exhaust hole and the PS conversion element that is cooled by the air exhausted from the second exhaust hole. There was a problem.

  Accordingly, the problem to be solved by the present invention is to efficiently cool a plurality of objects to be cooled (electronic devices and components accompanied by heat) when air from a cooling fan is caused to flow through a plurality of flow paths. It is to be.

The present invention solves the above problems by the following means.
According to a first aspect of the present invention, there is provided a cooling fan that generates wind for cooling an electronic device, and a direction of travel of the wind generated by the cooling fan toward the electronic device. A ventilation duct that guides the air from the cooling fan, the air duct taking in the wind from the cooling fan, the first exhaust part for discharging the wind toward the first cooling target of the electronic device, A second exhaust part for discharging wind toward the second cooling target of the electronic device, and a first flow for changing the traveling direction so that the wind flow taken from the intake part is directed to the first exhaust part and flowing the wind A path, a second flow path that changes the advancing direction so that the flow of wind taken from the intake section is directed to the second exhaust section, and between the first flow path and the second flow path Blower for electronic equipment having a first partition plate for partitioning It is the location.

  According to a fifth aspect of the present invention, there is provided a cooling fan that generates a wind for cooling a component that includes heat, and the wind generated by the cooling fan that is directed to the component. The air duct includes an air blowing device that guides the air by changing the traveling direction, and the air duct discharges the air toward the first cooling target of the electronic device and an intake portion that takes in the air from the cooling fan. The first exhaust part, the second exhaust part for discharging the wind toward the second cooling target of the electronic device, and the direction of travel are changed so that the flow of wind taken from the intake part is directed to the first exhaust part. A first flow path for flowing wind, a second flow path for flowing wind by changing the advancing direction so that the flow of wind taken from the intake section is directed to the second exhaust section, the first flow path and the first flow path A first partition plate that partitions the second flow path; A blower with an electronic device having.

(Function)
The invention according to claim 1 and claim 5 includes a first flow path for changing the advancing direction so that the flow of wind taken from the intake portion is directed to the first exhaust portion, and taking in from the intake portion. And a second flow path for changing the direction of travel so that the wind flow is directed toward the second exhaust part. The first flow path and the second flow path are partitioned by a first partition plate. Therefore, even if there is one cooling fan, the wind from the cooling fan is divided into wind flowing through the first flow path and wind flowing through the second flow path.

  According to said invention, the wind from a cooling fan is divided into the wind which flows through a 1st flow path, and the wind which flows through a 2nd flow path. And the wind which flows through a 1st flow path goes to a 1st exhaust part, and the wind which flows through a 2nd flow path goes to a 2nd exhaust part. For this reason, separate cooling objects (electronic equipment and heat) are used for the wind that flows through the first flow path and is discharged from the first exhaust part and the wind that flows through the second flow path and is discharged from the second exhaust part. The accompanying parts) can be cooled. Therefore, efficient cooling can be performed on a plurality of objects to be cooled.

The best mode for carrying out the present invention (hereinafter referred to as an embodiment) will be described below with reference to the drawings.
Here, the electronic device according to the present invention is a liquid crystal projector 10 which is a projection display device in the following embodiments. In the following embodiments, the blower of the present invention is assumed to be a sirocco fan 20 (corresponding to a cooling fan in the present invention) and a blower duct 30 incorporated in the liquid crystal projector 10.

[Configuration Example of Electronic Device (Liquid Crystal Projector 10)]

FIG. 1 is a perspective view showing an internal structure of a liquid crystal projector 10 as an embodiment of the electronic apparatus of the present invention.
FIG. 2 is a plan view showing the internal structure of the liquid crystal projector 10 as one embodiment of the electronic apparatus of the invention.
FIG. 3 is a plan view showing the internal structure of the optical unit 40 in the liquid crystal projector 10 shown in FIGS.
The liquid crystal projector 10 incorporates a sirocco fan 20 and a blower duct 30 as an embodiment of the blower of the present invention.

  As shown in FIGS. 1 and 2, the liquid crystal projector 10 has an optical unit 40 and a power supply unit 60 housed in a rectangular parallelepiped case 11. The optical unit 40 includes a lamp unit 41 (which corresponds to a light source in the present invention) that emits light for projecting an image, a light valve 42 that modulates the light emitted from the lamp unit 41, and the like. ing. The lens holding frame 12 is attached to the side surface of the optical unit 40 close to the light valve 42. Further, the lens holding frame 12 holds a projection lens 13 that projects an image so that the tip portion protrudes from the side surface of the case 11. Therefore, an image obtained by irradiating the light bulb 42 with the light emitted from the lamp unit 41 is displayed on a screen or the like via the projection lens 13.

  Here, in the optical unit 40, as shown in FIG. 3, in addition to the lamp unit 41 and the light bulb 42 (42R, 42G, 42B), a fly-eye lens 43, a PS conversion element 44 (first cooling in the present invention). (Corresponding to the target conversion element), condenser lens 45, dichroic mirrors 46a, 46b, total reflection mirrors 47a, 47b, 47c, relay lenses 48a, 48b, field lenses 49 (49R, 49G, 49B), incident side polarization A plate 50 (50R, 50G, 50B), an output side polarizing plate 51 (51R, 51G, 51B), and a cross prism 52 (corresponding to the second cooling object in the present invention) are provided. The light bulb 42R modulates light in the red (R) wavelength region in the light emitted from the lamp unit 41. The light valve 42G modulates light in the green (G) wavelength region. Furthermore, the light valve 42B modulates light in the blue (B) wavelength region. The field lens 49, the incident side polarizing plate 50, and the outgoing side polarizing plate 51 are provided corresponding to the light valves 42R, 42G, and 42B, respectively.

  In the optical unit 40, each optical component will be described in order from the light emission side. The lamp unit 41 is obtained by attaching a discharge lamp 41b to a reflector 41a. And the protective glass 41c is attached to the opening surface of the reflector 41a. Therefore, the light emitted from the discharge lamp 41b is reflected by the reflector 41a and is emitted from the protective glass 41c.

  Next, two fly-eye lenses 43 are arranged at positions separated from the lamp unit 41. The fly-eye lens 43 divides the light from the lamp unit 41 having an intensity distribution into a number of light spots, and makes the luminance distribution of the entire screen of the light bulb 42 (42R, 42G, 42B) uniform. is there.

  In addition, a PS conversion element 44 and a condenser lens 45 are arranged in order near the fly-eye lens 43. The PS conversion element 44 is composed of a polarizing beam splitter formed by laminating a strip-shaped glass coated with a dielectric film with an adhesive, and a phase plate provided intermittently corresponding to the polarizing beam splitter. Yes. The PS conversion element 44 converts the polarization direction of the light from the lamp unit 41 (aligns the polarization direction).

  Furthermore, the dichroic mirrors 46 a and 46 b are located on the opposite side of the PS conversion element 44 with the condenser lens 45 interposed therebetween, and are spaced apart from the condenser lens 45 by a predetermined distance. Further, the dichroic mirrors 46a and 46b are arranged so as to be inclined by 45 ° in the same direction, separated by a predetermined distance. The dichroic mirror 46a reflects only 90% of the light in the blue (B) wavelength region among the light that has passed through the condenser lens 45. On the other hand, among the light in the wavelength region that is not reflected by the dichroic mirror 46a, the light in the green (G) wavelength region is reflected by 90 ° by the dichroic mirror 46b. Note that the light in the blue (B) wavelength region reflected by the dichroic mirror 46a is again reflected by 90 ° by the total reflection mirror 47a arranged at a distance.

  Therefore, only the light in the red (R) wavelength region among the light that has passed through the condenser lens 45 is not reflected by the dichroic mirror 46a and the dichroic mirror 46b, but goes straight. For this reason, a relay lens 48a and a total reflection mirror 47b are disposed behind the dichroic mirror 46b, and light in the red (R) wavelength region is reflected by 90 ° by the total reflection mirror 47b. Further, the light in the red (R) wavelength region is transmitted through the relay lens 48b that is spaced apart and reflected again by 90 ° by the total reflection mirror 47c.

  In this manner, the light in the red (R) wavelength region, the light in the green (G) wavelength region, and the light in the blue (B) wavelength region are separated by the dichroic mirrors 46a and 46b. Then, the light in the blue (B) wavelength region reflected by the total reflection mirror 47a is incident on the field lens 49B that is disposed separately. The light in the green (G) wavelength region reflected by the dichroic mirror 46b is incident on the field lens 49G. Furthermore, the light in the red (R) wavelength region reflected by the total reflection mirror 47c is incident on the field lens 49R.

  On the exit side of the field lenses 49R, 49G, and 49B, incident-side polarizing plates 50R, 50G, and 50B corresponding to the respective exit lenses are disposed apart from each other. Therefore, light in the red (R), green (G), and blue (B) wavelength regions respectively incident on the field lenses 49R, 49G, and 49B is transmitted through the incident-side polarizing plates 50R, 50G, and 50B and is predetermined. It becomes light of the polarization direction.

  Further, light valves 42R, 42G, and 42B, which are light modulation elements, are arranged so as to face the incident-side polarizing plates 50R, 50G, and 50B. Then, in the light valves 42R, 42G, and 42B, the polarization plane of the light is rotated based on the applied image signal. Predetermined polarization components of the light whose polarization plane has been rotated are transmitted through the exit-side polarizing plates 51R, 51G, and 51B that are disposed apart from the light valves 42R, 42G, and 42B, and are transmitted as image light to each of the cross prisms 52. The light is incident on the incident surface (three side surfaces where the projection lens 13 is not disposed) and is color-synthesized. For this reason, the color-synthesized light is emitted from the projection lens 13, and a full-color image is projected on a screen or the like.

  As described above, the light emitted from the lamp unit 41 is color-combined by the cross prism 52 and emitted from the projection lens 13, and the cross prism 52 and the like are components accompanied by heat at the time of image projection. The PS conversion element 44 and the like are components that are heated to a high temperature in order to receive light from the lamp unit 41. For this reason, it is necessary to cool each of the peripheral portions of the cross prism 52 and the PS conversion element 44 accompanied by heat by blowing air and keep them below the limit guarantee temperature.

  However, if the PS conversion element 44 and the cross prism 52 are cooled by separate fans (two fans), not only the liquid crystal projector 10 is increased in size, but also the cost increases due to the use of two fans, and fan noise is reduced. Problems such as an increase occur. Therefore, in the liquid crystal projector 10 according to the present embodiment, as shown in FIGS. 1 and 2, one sirocco fan 20 is disposed behind the optical unit 40, and the sirocco fan 20 allows the PS conversion element 44 and the cross prism. The wind for cooling 52 is generated.

  Here, the wind from the sirocco fan 20 is guided by the air duct 30 (see FIG. 2) connected to the sirocco fan 20 and travels toward the PS conversion element 44 and the cross prism 52 shown in FIG. For this reason, the PS conversion element 44 and the cross prism 52 in the optical unit 40 are each held below the limit guaranteed temperature. The air heated in the optical unit 40 is discharged to the outside of the case 11 by the two exhaust fans 14 disposed on the side surface of the case 11.

[Configuration example of blower device (sirocco fan 20 and blower duct 30)]

FIG. 4 is a perspective view showing the sirocco fan 20 and the air duct 30 as one embodiment of the air blower of the present invention.
As shown in FIG. 4, the sirocco fan 20 has a fan case 21. And air is taken in from the four intake holes 21 a formed in the upper part of the fan case 21, and the wind is sent into the blower duct 30.

  The air duct 30 is connected to the sirocco fan 20 and guides the wind generated by the sirocco fan 20 toward the PS conversion element 44 (see FIG. 3) and the cross prism 52 (see FIG. 3) while changing the traveling direction. is there. Specifically, the air duct 30 is provided with a first exhaust hole 31 that discharges wind toward the periphery of the PS conversion element 44 that is the first cooling target of the liquid crystal projector 10 (see FIGS. 1 and 2) (the present invention). And a second exhaust hole 32 (corresponding to the second exhaust part in the present invention) for exhausting air toward the peripheral part of the cross prism 52 that is the second cooling target. have.

  Further, the air duct 30 is directed so as to be directed to the first flow path 33 and the second exhaust hole 32 in which the flow of the wind taken from the sirocco fan 20 is changed so that the flow is directed toward the first exhaust hole 31. And a second flow path 34 that changes the advancing direction and flows wind. Furthermore, it has the 3rd flow path 35 which changes the advancing direction so that the flow of the wind taken in from the sirocco fan 20 may go to the 1st exhaust hole 31 by a path | route different from the 1st flow path 33, and flows. Yes.

FIG. 5 is a plan view and a side view showing the internal structure of the sirocco fan 20 shown in FIG.
As shown in FIG. 5A, the sirocco fan 20 is a fan case 21 in which a rotatable rotor blade 22 is housed. Specifically, the fan case 21 is formed with an arcuate arc wall 21a as viewed in a plane orthogonal to the rotation center axis 22a of the rotor blade 22 (see FIG. 5B). And the inner side of the circular arc wall 21a becomes the rotary blade accommodating part 23 which accommodates the rotary blade 22 rotatably. Further, the fan case 21 has a linear straight wall 21 b protruding from the rotor blade housing portion 23 in the centrifugal direction of the rotor blade 22, and the inside of the straight wall 21 b receives the centrifugal wind generated by the rotor blade 22. It becomes the discharge part 24 which discharges.

  Further, a space between the outer peripheral portion of the rotary blade 22 and the arc wall 21 a of the fan case 21 is formed as a blower space 25. The blower space 25 is formed so as to gradually increase in width in the rotational drive direction of the rotor blade 22 (in the clockwise direction in the embodiment) as it approaches the discharge unit 24. Specifically, the portion away from the discharge portion 24 is the narrowest minimum width portion 25a, and the portion close to the discharge portion 24 is the widest maximum width portion 25b.

  In such a sirocco fan 20, centrifugal wind is generated in the air blowing space 25 by rotating the rotor blades 22 in the clockwise direction, and the wind is indicated by an arrow along the arc wall 21 a of the fan case 21. Flowing into. Further, the air volume increases from the minimum width portion 25a to the maximum width portion 25b of the blower space 25. From the maximum width portion 25b, wind flows along the straight wall 21b of the fan case 21 as indicated by an arrow, and the wind is discharged in parallel to the straight wall 24a (straight from the discharge portion 24).

  Here, as viewed in the side view shown in FIG. 5B, the wind discharged from the upper side in the thickness direction of the discharge portion 24 is sent into the first flow path 33. On the other hand, the wind discharged from the lower side of the discharge unit 24 is sent to the second flow path 34 and the third flow path 35. This is because the generated wind flow is biased along the straight wall 21b (see FIG. 5A) of the discharge section 24, so that the wind is appropriately divided and used. Specifically, when the flow of the wind is divided into left and right in the width direction of the discharge section 24, a large amount is sent to the side closer to the straight wall 21b. However, if the discharge part 24 is divided into upper and lower parts in the thickness direction, the deviation of the amount of air sent can be reduced.

FIG. 6 is a perspective view showing the surface side of the air duct 30 shown in FIG.
FIG. 7 is a perspective view showing an AA ′ section and a BB ′ section in the air duct 30 shown in FIG. 6.
Furthermore, FIG. 8 is a perspective view showing the back side of the air duct 30 shown in FIG.
As shown in FIG. 6, the air duct 30 has a fan mounting portion 36 to which the sirocco fan 20 (see FIG. 5) is attached and an intake portion 37 that takes in the wind from the sirocco fan 20.

  Here, the wind taken in from the intake part 37 flows through the first flow path 33, the second flow path 34, and the third flow path 35, and the traveling direction can be changed. And the wind which flows through the 1st flow path 33 and the 3rd flow path 35 is discharged | emitted from the 1st exhaust hole 31. As shown in FIG. Further, the wind flowing through the second flow path 34 is discharged from the second exhaust hole 32. Note that the second flow path 34 and the third flow path 35 are a common flow path on the intake portion 37 side.

  Thus, the wind generated by the sirocco fan 20 (see FIG. 5) is taken in from the intake portion 37 and is discharged from the first exhaust hole 31 and the second exhaust hole 32. Therefore, as shown in FIG. 7A, the intake portion 37 is provided with a first partition plate 38 (corresponding to the first partition plate and the partition plate in the present invention). The first partition plate 38 partitions the first flow path 33 and the second flow path 34 (and the third flow path 35), and the wind entering the first flow path 33 and the second flow path 34. The wind entering the (and third flow path 35) is arranged so as to be separated in the direction of the rotation center axis 22a of the rotor blade 22. Specifically, the first partition plate 38 rises from the bottom to the top so that the first flow path 33 and the second flow path 34 (and the third flow path 35) are divided into two in the vertical direction. ing. An upper portion of the first partition plate 38 is an opening, and the tip of the opening is connected to the first flow path 33. Therefore, the wind taken in from the upper part of the intake part 37 (refer FIG. 6) will be sent into the 1st flow path 33. FIG.

  Moreover, as shown in FIG.7 (b), the 1st flow path 33 is the side of the ventilation duct 30, and the flow of the wind taken in from the upper part of the intake part 37 (refer FIG. 6) goes to the downward direction from the middle. Is formed. Further, the air flow is formed so that the wind flows toward the first exhaust hole 31 to the right. Therefore, the wind taken in from the upper part of the intake part 37 is changed in the traveling direction by the first flow path 33 and is finally discharged upward from below the first exhaust hole 31 as shown in FIG. Will come to be.

  On the other hand, the wind taken in from the lower part of the intake part 37 (see FIG. 6) collides with the first partition plate 38, changes its traveling direction, and the second flow path 34 (and the third flow path 35) heads to the right. ) Here, the first partition plate 38 is arranged so that more air flows through the second flow path 34 (and the third flow path 35) than the first flow path 33. Specifically, the first partition that allows the wind to flow toward the second flow path 34 (and the third flow path 35) rather than the opening above the first partition plate 38 that serves as the inlet of the first flow path 33. The rising portion of the plate 38 is larger.

  Moreover, the 2nd flow path 34 and the 3rd flow path 35 which became a common flow path by the side of the intake part 37 (refer FIG. 6) are divided from the middle, as shown in FIG. Specifically, the second flow path 34 and the third flow path 35 are partitioned by the second partition plate 39 so that the third flow path 35 is wider than the second flow path 34. The second flow path 34 is formed so that the wind flow is directed toward the second exhaust hole 32. Therefore, most of the wind taken in from the lower part of the intake part 37 is changed in the traveling direction by the second flow path 34, and finally, as shown in FIG. Will be discharged.

  On the other hand, the third flow path 35 is formed so that the flow of wind is directed toward the first exhaust hole 31. Therefore, a part of the wind taken in from the lower part of the intake part 37 is changed in the traveling direction by the third flow path 35, and finally, from the lower side of the first exhaust hole 31 to the upper side as shown in FIG. It will be discharged towards. Therefore, the third flow path 35 is a path different from the first flow path 33, and changes the traveling direction so that the wind flows toward the first exhaust hole 31 and flows the wind.

  Thus, the wind taken from the upper part of the intake part 37 (refer to FIG. 6) is changed in the traveling direction by the first flow path 33 so that the wind flow is directed to the first exhaust hole 31. Further, most of the wind taken from the lower portion of the intake portion 37 can be changed in the traveling direction by the second flow path 34 so that the wind flow is directed to the second exhaust hole 32. Furthermore, a part of the wind taken in from the lower part of the intake part 37 is changed in the traveling direction by the third flow path 35 so that the wind flow is directed to the first exhaust hole 31. Finally, more wind is discharged from the second exhaust hole 32 than from the first exhaust hole 31.

  Here, the first exhaust hole 31 discharges the wind toward the peripheral portion of the PS conversion element 44 (see FIG. 3) that is the first cooling target of the liquid crystal projector 10 (see FIGS. 1 and 2). Has been placed. On the other hand, the second exhaust hole 32 is arranged such that wind is discharged toward the periphery of the cross prism 52 (see FIG. 3) that is the second cooling target of the liquid crystal projector 10. Therefore, in the liquid crystal projector 10 of the present embodiment, the wind from one sirocco fan 20 (see FIG. 5) flows separately through the first flow path 33, the second flow path 34, and the third flow path 35. And the wind which flowed through the 1st flow path 33 and the 3rd flow path 35 is discharged | emitted from the 1st exhaust hole 31, and the PS conversion element 44 is cooled. Further, the wind that has flowed through the second flow path 34 is discharged from the second exhaust hole 32, and the cross prism 52 is cooled. The PS conversion element 44 is a component that receives light from the lamp unit 41 (see FIG. 3) and is heated to a high temperature, and the cross prism 52 is a component that generates heat during image projection.

  Further, the wind that has flowed through the first flow path 33, the second flow path 34, and the third flow path 35 is discharged from the second exhaust holes 32 more than the first exhaust holes 31. Therefore, in the liquid crystal projector 10 of this embodiment (see FIGS. 1 and 2), the cross prism 52 (see FIG. 3) is preferentially cooled over the PS conversion element 44 (see FIG. 3). As a result, each can be efficiently cooled according to the temperature or the like of each cooling target.

  As mentioned above, although embodiment of this invention was described, this invention is not limited to embodiment mentioned above, A various deformation | transformation is possible. For example, in the present embodiment, the liquid crystal projector 10 that is a projection display device is taken as an example of the electronic apparatus, and the PS conversion element 44 and the cross prism 52 are to be cooled. However, the present invention is not limited to this, and various components accompanied by heat, such as the lamp unit 41 and the light bulb 42, can be the cooling target. Further, the present invention is not limited to the liquid crystal projector, and can be widely applied to various electronic devices such as a liquid crystal display and a notebook personal computer, and backlights of these electronic devices, components such as a CPU that involve heat, and the like.

1 is a perspective view showing an internal structure of a liquid crystal projector as an embodiment of an electronic apparatus of the present invention. It is a top view which shows the internal structure of the liquid crystal projector as one Embodiment of the electronic device of this invention. It is a top view which shows the internal structure of the optical unit in the liquid crystal projector shown in FIG.1 and FIG.2. It is a perspective view which shows the sirocco fan and ventilation duct as one Embodiment of the air blower of this invention. It is the top view and side view which show the internal structure of the sirocco fan shown in FIG. It is a perspective view which shows the surface side of the ventilation duct shown in FIG. It is a perspective view which shows the A-A 'cross section and B-B' cross section in the ventilation duct shown in FIG. It is a perspective view which shows the back surface side of the ventilation duct shown in FIG.

Explanation of symbols

10 Liquid crystal projector (electronic equipment)
13 Projection lens 20 Sirocco fan (cooling fan)
22 Rotating blades 22a Rotation center shaft 30 Air duct 31 First exhaust hole (first exhaust part)
32 2nd exhaust hole (2nd exhaust part)
33 1st flow path 34 2nd flow path 35 3rd flow path 37 Intake part 38 1st partition plate (partition plate)
39 Second partition plate 41 Lamp unit (light source)
42 Light valve 44 PS conversion element (conversion element that is the first cooling target)
52 Cross prism (second cooling target)

Claims (6)

A cooling fan that generates air for cooling electronic devices;
An air duct connected to the cooling fan and guiding the wind generated by the cooling fan toward the electronic device while changing a traveling direction;
The air duct is
An intake for taking in the wind from the cooling fan;
A first exhaust unit for discharging wind toward the first cooling target of the electronic device;
A second exhaust unit for discharging wind toward the second cooling target of the electronic device;
A first flow path that changes the advancing direction so that the flow of wind taken from the intake section is directed to the first exhaust section, and flows the wind;
A second flow path that changes the advancing direction so that the flow of wind taken from the intake portion is directed to the second exhaust portion, and flows the wind;
A blower for electronic equipment, comprising: a first partition plate that partitions the first flow path and the second flow path. In the electronic device blower according to claim 1,
The cooling fan has a rotor blade that generates wind in a centrifugal direction,
The electronic apparatus blower according to claim 1, wherein the first partition plate is arranged such that the wind entering the first flow path and the wind entering the second flow path are separated in a direction of a rotation center axis of the rotary blade. In the electronic device blower according to claim 1,
The blower for electronic equipment, wherein the first partition plate is arranged such that more air flows in the second flow path than in the first flow path. In the electronic device blower according to claim 1,
The air duct is
A third flow path that changes the advancing direction so that the flow of wind taken from the intake section is directed to the first exhaust section in a different path from the first flow path;
A blower for electronic equipment, comprising: the third flow path and a second partition plate that partitions the first flow path or the second flow path. A cooling fan that generates air for cooling the components with heat;
An air blower connected to the cooling fan and configured to guide a wind generated by the cooling fan toward the component while changing a traveling direction;
The air duct is
An intake for taking in the wind from the cooling fan;
A first exhaust unit for discharging wind toward the first cooling target of the electronic device;
A second exhaust unit for discharging wind toward the second cooling target of the electronic device;
A first flow path that changes the advancing direction so that the flow of wind taken from the intake section is directed to the first exhaust section, and flows the wind;
A second flow path that changes the advancing direction so that the flow of wind taken from the intake portion is directed to the second exhaust portion, and flows the wind;
An electronic device with a blower, comprising: a partition plate that partitions the first flow path and the second flow path. In the electronic device with an air blower according to claim 5,
A light source that emits light for projecting an image;
A conversion element for converting the polarization direction of the light emitted from the light source;
A light valve that modulates light polarized by the conversion element;
A cross prism that color-synthesizes the light modulated by the light valve;
A projection lens for projecting light synthesized by the cross prism;
The first exhaust part of the air duct discharges air toward the peripheral part of the conversion element,
The second exhaust part of the blower duct discharges air toward the peripheral part of the cross prism.

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