JP5289352B2 - Cooling structure - Google Patents

Description

  The present invention relates to a cooling structure, and more particularly to a cooling structure attached to a video apparatus.

  For example, a video device such as a television receiver generates heat during operation, but conventional video devices place importance on quietness and are cooled by natural air cooling. However, with the recent increase in size and functionality of video equipment, the amount of heat generation has increased and cooling by forced air cooling has been performed.

  On the other hand, in the video equipment, since the necessity of avoiding the influence on the audio for video is required, quietness is particularly important for the forced air cooling device. Therefore, in the forced air cooling device, it is difficult to use a large fan with high rotation, and as a result, there is a problem that the amount of blown air is small and high-efficiency cooling is difficult. In order to solve such a problem, for example, in Patent Document 1, a large air passage is formed in the casing of the video equipment itself, an electronic device is accommodated in the air passage, and a fan is provided on the side surface of the air passage. A configuration to provide is proposed.

JP-A-9-102281

  However, in the configuration disclosed in Patent Document 1, it is possible to surely ventilate the air passage, but high-temperature exhaust air passes through the gap between the air passage and the housing, thereby A circulating flow toward the mouth will occur. Therefore, there is a problem that the temperature of the air entering the air passage becomes high and a sufficient heat removal effect cannot be obtained. In addition, there is a problem that the cooling ability is small because it is not possible to concentrate air on the radiating fins that require high-efficiency cooling. Furthermore, there is a problem that the exhausted air from the fans arranged in parallel interferes with each other and the amount of air blown is small.

  The present invention has been made to solve such a problem, and an object of the present invention is to provide a cooling structure capable of cooling an apparatus with higher cooling efficiency than conventional ones.

In order to achieve the above object, the present invention is configured as follows.
That is, the cooling structure in one embodiment of the present invention includes an intake side surface having an intake port, a housing having an exhaust side surface facing the intake side surface and having an exhaust port, the intake side surface in the housing, and the above An electronic device accommodated between the exhaust side surface, an exhaust fan that is provided between the electronic device and the exhaust port and forms an airflow flowing from the intake port to the exhaust port, and the exhaust fan is accommodated A cooling structure including a fan case disposed adjacent to the exhaust side surface, wherein the cooling structure is a structure for cooling an electronic device housed in a casing of a video device, and the electronic device is , a laser light source for generating a laser beam irradiated to the screen back of the video device, the housing, which has a frame surrounding the screen for displaying an image, the intake side and the exhaust side surface of the housing , At a position close to the laser light source than the frame, as viewed from the screen rear surface side and which are located located inside the said frame member.

  According to the cooling structure of the above aspect, the housing that houses the electronic device and the fan case is provided, and the exhaust case and the heat radiating member are housed in the fan case. Therefore, ventilation can be performed only within the housing in the cooling structure. In other words, the provision of the fan case allows air to flow from the intake port to the exhaust port in the housing, thereby preventing the formation of a hot air pool trapped in the housing, and bypass flow that circulates from the exhaust port to the intake port. Can be suppressed. Therefore, the casing serves as a ventilation path, and the electronic equipment accommodated in the casing can be cooled by ventilation, and air can be reliably blown to the heat radiating member, thereby improving the cooling efficiency. Can do.

It is a top view which shows the outline of the cooling structure in Embodiment 1 of this invention with a main body apparatus back surface. 1B is a front view of the main device shown in FIG. 1A. FIG. 1B is a top view of the main device shown in FIG. 1A. FIG. It is a left side view of the main device shown in FIG. 1A. It is a right side view of the main device shown in FIG. 1A. 1B is a rear view of the main device shown in FIG. 1A. FIG. It is sectional drawing which shows schematic structure in the fan case with which the cooling structure in Embodiment 2 of this invention is equipped. It is the figure which looked at the fan case shown to FIG. 2A from the right side, and is an exhaust drawing of a fan case. It is an experimental result which shows airflow velocity distribution in the exhaust fan accommodated in the fan case which does not provide the conventional partition plate. It is an experimental result which shows airflow velocity distribution in the exhaust fan accommodated in the fan case shown to FIG. 2A.

  A cooling structure according to an embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the same code | symbol is attached | subjected about the same or similar component. Further, in the embodiment described below, for example, a case where the cooling structure is provided for a video device is taken as an example, but the target device including the cooling structure is not limited to the video device.

Embodiment 1 FIG.
1A to 1F are diagrams illustrating a video apparatus 102 to which a cooling structure according to Embodiment 1 of the present invention is applied. 1B to 1E are a front view, a top view, a left side view, a right side view, and a rear view of the video equipment, respectively. Moreover, FIG. 1A is AA sectional drawing of FIG. 1C. The video equipment 102 is, for example, a video equipment having electronic components that generate a large amount of heat, such as a rear projection television (laser television), a plasma display television, and a liquid crystal television. Hereinafter, a case where the video equipment shown in FIGS. 1A to 1F is a laser TV will be described as an example, but equipment to which the present invention is applicable is not limited to this.

  For convenience of explanation, in the following, the longitudinal direction of the screen 126 of the video equipment is horizontal, the short side is vertical, the direction from the back side to the front side of the video equipment is the front direction, and the direction from the front side to the back side is the back. This will be described as a direction. The left and right sides in the direction from the front side to the back side of the video equipment are simply referred to as the left side and the right side.

  In FIG. 1B, the screen 126 is surrounded by a frame body (bezel) 127, and side portions 112 and 113 are provided on the inner side in the horizontal direction than the bezel 127. More specifically, the side portions 112 and 113 of the video equipment are wall portions 112a and 113a that extend backward from the bezel 127 in an inverted C shape, and walls that extend from the ends of the wall portions 112a and 113a in the rearward direction. Parts 112b and 113b. Further, an upper surface portion 201 is provided on the upper part of the video equipment. More specifically, an upper surface portion 201a that covers between the wall portions 112a and 113a and an upper surface portion 201b that covers between the wall portion 112b and the wall portion 113b are provided. Provided. Further, the lower surface portion 202 is provided on the lower surface of the video equipment. More specifically, a lower surface portion 202a that covers between the wall portions 112a and 113a and a lower surface portion 202b that covers between the wall portions 112b and 113b are provided. ing. In addition, a back portion 129 is provided on the back of the video equipment to cover a region surrounded by the ends of the wall portion 112b, the upper surface portion 201b, the wall portion 113b, and the lower surface portion 202b.

  A housing 111 of the video equipment in this embodiment includes the above-described bezel 127, left side surface portion 112, right side surface portion 113, top surface portion 201, bottom surface portion 202, and back surface portion 129. Here, all the above-described side surface portions 112 and 113, the upper surface portion 201, the lower surface portion 202, and the back surface portion 129 may be integrally formed by resin molding or the like. For example, the wall portion 112b, the upper surface portion 201b, the wall portion 113b, Only the lower surface portion 202b and the back surface portion 129 may be integrally formed separately from the remaining portions, and the remaining portions may be integrally formed by screwing or the like. In that case, leaking air that enters from the outside of the housing into the housing through the gap of the connection portion occurs, but in the present embodiment, even when such leaking air occurs, Since the structure allows ventilation only from the fan to the exhaust port, it is possible to efficiently cool the heat generating components in the video equipment without reducing other ventilation characteristics. Similarly, the back surface portion 129 may have several openings.

  In FIG. 1A, reference numerals 117c to 117e denote semiconductor laser light sources that emit light in red (R), green (G), and blue (B), respectively, and laser light from these light sources 117c to 117d is not shown in a light guide path (lens barrel). Or an optical fiber), an optical engine, a projection lens or an aspherical mirror, and a diffusing plate. Since such laser light sources are electronic components that generate a large amount of heat, if they continue to be used at high power without taking sufficient heat dissipation measures, individual semiconductor laser elements will deteriorate due to their own heat generation, resulting in a significant increase in device life. Shrink. Therefore, a laser TV needs a cooling structure that efficiently cools the light source. In addition, since the laser light source of such a laser TV is usually provided near the center in the horizontal direction of the housing, even if an opening is provided on the side of the housing, the distance from the opening to the laser light source is long. Difficult to cool.

  In the first embodiment, as a countermeasure against the heat, an opening 312 and an opening 313 are provided as an intake port and an exhaust port, respectively, on the side surfaces 112 and 113 of the video equipment, and the laser light sources 117c to 117e are thermally conducted. Is disposed on a heat receiving plate 117b formed of a material having good properties, for example, a metal material such as copper or aluminum, and a heat radiating member 123 such as a heat radiating fin is provided in the vicinity of the exhaust port 313, and the heat receiving plate 117b and the heat radiating member The heat transfer member 125 such as a heat pipe is thermally coupled to the heat transfer member 123. Further, a fan 122 is provided between the heat dissipation member 123 and the exhaust port 313 to create an airflow with the intake port 312 side as the upstream side and the exhaust port 313 side as the downstream side. This is accommodated in a frame-shaped fan case 121 having openings on the side and the exhaust port 313 side. The heat transport member 125 is divided into two elements so that the heat receiving plate 117b and the heat radiating member 123 can be separated. As a result, the heat radiating member 125 may be configured by thermally connecting the respective heat radiating members. Good.

  In addition, here, the heat receiving plate that receives heat from the laser light sources 117c to 117e extends in the horizontal direction, whereas the heat radiating member 123 provided in the vicinity of the exhaust port 313 has the vertical direction as the longitudinal direction. A plurality of fans 122 are arranged along the longitudinal direction of the heat dissipating member, and exhaust ports 313 are provided in portions facing the fans, that is, by providing exhaust ports 313 whose longitudinal direction is the vertical direction, a larger exhaust port is formed. In addition, heat from the laser light source can be efficiently discharged from the exhaust port 313 provided on the side surface of the housing without increasing the thickness of the video equipment.

Further, here, the side surfaces 112 and 113 of the video equipment are brought closer to the video equipment center side in the horizontal direction, that is, the laser light sources 117c to 117e side, than the bezel 127 at the screen peripheral edge of the video equipment. By providing the intake port 312 and the exhaust port 313 in 112 and 113, the distance between the intake port 312 and the exhaust port 313 is made closer, and the intake port 312 and the exhaust port 313 are made closer to the laser light sources 117c to 117e side. Therefore, when the heat from the laser light sources 117c to 117e is efficiently discharged and the heat transport member 125 is used, the transport distance can be shortened. Further, a power supply circuit that is a heat generating component other than the laser light source and a video / audio signal processing circuit 117a that generates less heat than those are provided in the space between the laser light sources 117c to 117e and the air inlet 312. The cooling structure can be used not only for cooling the laser light source but also for cooling other circuits.
Desirably, circuit equipment (video / audio signal processing circuit 117a, power supply circuit, etc.), optical equipment (optical engine, projection lens, laser light source, etc.) disposed in the center, heat radiation member, fan, and finally exhaust air from the intake port. It arrange | positions so that it can ventilate in order of a mouth.

  In addition, the exhaust port 313 needs to be provided to face the opening of the fan case 121, while the intake port 312 has few such positional and shape restrictions, so that the video / audio signal processing described above is performed. The video / audio signal input / output terminal 128 connected to the circuit 117a is provided in the side surface portion 112 in the vicinity of the video / audio signal processing circuit 117a, that is, the side surface portion 112 in which the intake port 312 is provided. / The input / output terminals 128 may be provided at positions facing the audio signal processing circuit 117a, and the shape of the intake port 312 provided in the side surface portion 112 may be different from the shape of the discharge port 313 provided in the side surface portion 113. . By doing so, the wiring connecting the input / output terminals 128 and the video / audio signal processing circuit 117a can be shortened as much as possible, and the signal deterioration of the video / audio signals input / output from the input / output terminals 128 can be suppressed. It becomes possible. Further, since the insertion port of the input / output terminal 128 opens in the horizontal direction, dust or the like is less likely to enter the input / output terminal 128 than when the input / output terminal 128 is provided on the top surface, and the input / output terminal 128 Compared with the case where the terminal 128 is provided, the video equipment main body can be easily installed near the wall, and the connector can be easily inserted into and removed from the input / output terminal 128.

  Next, the fan case 121 will be described in detail. The fan case 121 is housed in the casing 111 as described above, and is a frame-like case arranged in correspondence with the exhaust port 313, in other words, a square pipe-like case. The periphery of the portion communicating with the port 313 is placed in close contact with the side surface 113 where the exhaust port 313 is provided. The fan case 121 is disposed adjacent to the exhaust port 313, and is disposed on the opposite side of the exhaust port 313 with respect to the exhaust fan 122, and dissipates heat generated by the electronic device. The heat radiating member 123 to be stored is accommodated and held in a frame-shaped fan case 121. In the present embodiment, the heat radiating member 123 is formed by a heat radiating fin as an example, and has a length corresponding to the exhaust fan 122 as illustrated. The heat dissipating member 123 is preferably configured by arranging a plurality of plate-like heat dissipating fins extending in the horizontal direction along the air flow direction in the vertical direction, and thermally connecting the heat dissipating fins and the heat transport member 125. preferable.

  Here, the laser light sources 117c to 117e are illustrated as the electronic devices that dissipate heat, but other electronic devices may be used. Some electronic devices 117 can dissipate heat only by ventilation along the side wall of the device main body 102. However, in a device having a high heating element such as an optical element such as a laser light source, it may be difficult to dissipate heat only by ventilation. is there. Here, the high heat generating element on the substrate is configured to be connected to the heat radiating member 123 by a high thermal conductor 125 such as a copper rod or a heat pipe. With such a configuration, the heat generated in the high heat generating element can be heat transported to the heat radiating member 123 by the high thermal conductor 125 and can be radiated through the heat radiating member 123.

  Since the fan case 121 has a frame shape as described above, the fan case 121 does not have a side surface facing the exhaust port 313. Therefore, when the exhaust fan 122 operates, air flows in the fan case 121 along the exhaust direction 124 from the heat radiating member 123 side to the exhaust port 313 side.

  Further, as in the present embodiment, in order to improve the cooling efficiency by flowing air in a straight line, the air inlet 312, the electronic device 117, and the fan case 121, that is, the air outlet 313 are arranged so as to be in a straight line. However, it is not limited to the configuration of the present embodiment.

  Further, as shown in the figure, in this embodiment, two exhaust fans 122 are provided, but at least one exhaust fan 122 may be provided. That is, the number of exhaust fans 122 may be one, or two, or three or more illustrated.

The operation of the cooling structure 101 configured as described above will be described below.
When a video device corresponding to an example of the device main body 102 outputs an image, the electronic devices 117 such as the laser light sources 117c to 117e generate heat, and the heat is transported to the heat radiating member 123. At this time, the pressure in the housing 111 decreases due to the operation of the exhaust fan 122. Therefore, low-temperature air around the casing 111 flows into the casing 111 mainly from the air inlet 312 through the gap between the casing 111 and the device main body 102. The low-temperature air that has flowed into the housing 111 from the air inlet 312 passes through the electronic device 117 installed on the way when it moves to the inlet of the fan case 121, that is, the heat dissipation member 123, and flows into the fan case 121. To do.

  The heat dissipating member 123 installed on the upstream side in the fan case 121 releases heat transported from the electronic device 117 to the low-temperature air, and the high-temperature air that has received the heat and rises in temperature passes through the exhaust fan 122 and is It is discharged from the exhaust port 313 of the body 111.

  As described above, the cooling structure 101 according to this embodiment has a configuration in which the exhaust fan 122 and the heat dissipation member 123 are surrounded by the fan case 121 and the fan case 121 and the electronic device 117 are accommodated in the casing 111. Therefore, the electronic device 117 housed in the casing 111 is ventilated and cooled, and the fan case 121 is installed in close proximity / close contact with the exhaust port 313. The occurrence of (bypass flow) is suppressed. Therefore, the air flowing in from the intake port 312 can be reliably discharged from the exhaust port 313. Further, since the intake port 312 and the exhaust port 313 are provided at positions facing each other, the high-temperature air does not move to the intake port 312 side. Therefore, low temperature air can always flow into the intake port 312.

In addition, by housing the heat radiating member 123 in the fan case 121, the low-temperature air that has flowed from the intake port 312 or the like can be surely cooled by passing through the heat radiating member 123, thereby enabling highly efficient cooling.
Note that the heat dissipation member 123 is not necessarily housed in the fan case 121 and may be disposed outside the fan case 121 in the housing 111 depending on the situation.

  The video equipment of this embodiment may be installed in a semi-open container (for example, a TV board) whose front is open. In this case, in particular, high-temperature air does not stagnate on the back of the video equipment. Since the apparatus is ventilated in the left-right direction, the effect of the present invention is great.

  Further, in this embodiment, since the exhaust port is provided at one place and the blower fan box is directly attached to the exhaust port, low-temperature air flows from each gap of the video equipment, so However, even if there are two or more exhaust ports, it is possible to obtain higher exhaust performance than before.

Embodiment 2. FIG.
The cooling structure in the second embodiment has a configuration in which the fan case 121 provided in the cooling structure 101 in the first embodiment described above is changed. Other configurations are the same as those in the cooling structure 101. Therefore, hereinafter, only the fan case 131 provided in the cooling structure according to the second embodiment will be described with reference to FIGS. 2A and 2B. 2A shows a cross section of the fan case 131 in the exhaust direction 124, and FIG. 2B is a view of the fan case 131 shown in FIG. 2A viewed from the right side.

  Like the fan case 121, the fan case 131 is a frame-shaped case, and includes two exhaust fans 122 (hereinafter also referred to as 122-1 and 122-2 for convenience of explanation) and heat dissipation. The member 123 is accommodated and held. The differences between the fan case 131 and the fan case 121 include the following three points.

  As a first point, the fan case 131 includes a partition plate 132 extending along the exhaust direction 124 between the exhaust fan 122-1 and the exhaust fan 122-2. Even when the fan case 131 includes three or more exhaust fans 122, a partition plate 132 is provided between the adjacent exhaust fans 122.

Such a partition plate 132 is provided for the following reasons.
That is, when two exhaust fans 122 having the same exhaust fan 122, that is, fans each rotating in the same direction, are arranged side by side, the air exhausted from each exhaust fan 122 has an arbitrary rotational direction as shown in FIG. 2B. Therefore, in the adjacent portion 133 of each exhaust fan 122, the airflows collide with each other and interfere with each other. Due to this interference, the kinetic energy of the airflow is attenuated, and the amount of ventilation decreases, in other words, the pressure loss increases. Further, the air flow sucked into the exhaust fans 122-1 and 122-2 interferes with each other even on the upstream side of the air flow in the exhaust fan 122, and the same adverse effect occurs.

  Therefore, the fan case 131 is provided with a partition plate 132 between the exhaust fan 122-1 and the exhaust fan 122-2, and suppresses the airflow of the exhaust fans 122-1 and 122-2 from interfering with each other. As a result, the attenuation of the momentum is suppressed, and the ventilation rate can be increased. Thereby, it is possible to select an exhaust fan 122 suitable for the amount of ventilation required in the cooling structure, in other words, the cooling capacity required in the device main body to which the cooling structure is attached. Therefore, it is possible to select a smaller exhaust fan 122 or to reduce the drive voltage of the exhaust fan 122, that is, to reduce the rotational speed of the fan, compared to the fan case 121 described above. Therefore, the fan case 131 can reduce noise generated from the exhaust fan 122 compared to the fan case 121.

In order to confirm the effectiveness of the partition plate 132, the applicant conducted the following experiment.
That is, an exhaust fan having a diameter of 92 mm was installed in parallel and driven at 7V. When there is no partition plate between both exhaust fans, the air volume discharged from both exhaust fans is 0.56 m ³ / min. On the other hand, when a partition plate is provided, the air volume is 0.72 m ³ / min, Increased about 30%.

  Moreover, the result of having measured the local wind speed in each exhaust fan is shown to FIG. 3A and FIG. 3B. FIG. 3A shows a case where no partition plate is provided, and FIG. 3B shows a case where a partition plate is provided. When the partition plate is provided, except for the boss portion at the center of the fan, the air is relatively well ventilated, but when there is no partition plate, the above-described adjacent portion 133, that is, the portion where the airflow from both fans collides, It can be seen that the ventilation characteristics are poor and the speed distribution is greatly broken.

As shown in FIG. 2A, the downstream portion 132 b of the partition plate 132 preferably extends to the air exhaust port 134 of the fan case 131. The exhaust port side end 132 c of the partition plate 132 located on the exhaust port 313 side is in contact with the fan case 131.
By comprising in this way, the interference of each exhaust from each adjacent exhaust fan 122-1 and 122-2 becomes small, and a ventilation characteristic improves.

Further, as shown in FIG. 2A, the downstream portion 132b of the partition plate 132 preferably has a shape that tapers as it moves away from the exhaust fan 122 along the exhaust direction 124. By adopting such a shape, the ventilation cross-sectional area increases as the distance from the exhaust fan 122 increases, and the swirling flow 122a flows smoothly, so that the ventilation characteristics can be further improved.
Note that the upstream portion 132a of the partition plate 132 is also preferably tapered at the tip as shown in FIG. 2A.

  In the present embodiment, the airflow interference between the exhaust fans 122 is suppressed by the partition plate 132 as described above. However, the same effect as described above can be obtained even when the rotation directions of the fans are set opposite to each other between the adjacent exhaust fans 122. Can be obtained.

  Second, it is preferable that the exhaust side of the fan case 131 connected to the exhaust port 313 has a shape 131 a that expands in the exhaust direction 124. By expanding the exhaust side of the fan case 131 into the shape 131a, the ventilation cross-sectional area can be increased as the distance from the exhaust fan 122 increases. Thereby, the airflow can be further smoothed and the ventilation characteristics can be improved by the synergistic effect with the tapered shape in the downstream portion 132b of the partition plate 132 described above. Moreover, by setting it as the expansive shape 131a, ventilation becomes possible to the exhaust port 313 at a more uniform speed. Moreover, since the cross-sectional area of the exhaust port is increased by the spread shape 131a, the maximum velocity of the airflow passing through the exhaust port 313 can be reduced, and the pressure loss generated when passing through the exhaust port 313 can be reduced. Therefore, the amount of blown air further increases, and the wind noise can be reduced.

  As a third point, the fan case 131 preferably has a vibration isolation material 135 at the joint between the fan case 131 and the exhaust fan 122. In this case, as shown in FIG. 2B, in the exhaust fan 122-1, the anti-vibration material 135a and the anti-vibration material 135b are arranged asymmetrically with respect to the symmetry axis 122b, and in the exhaust fan 122-2, the anti-vibration material It is preferable to dispose the material 135c and the vibration isolating material 135d asymmetrically with respect to the symmetry axis 122c. Thus, by installing the vibration isolator 135 in an asymmetrical system, the timbre (frequency) of the noise generated from each of the exhaust fans 122-1 and 122-2 is shifted and the resonance of the fan vibration is suppressed to reduce the noise. can do. Furthermore, the noise reduction effect is increased by shifting the phase by a half period.

  In the present embodiment, as shown in FIG. 2B, the exhaust fan 122-1 is arranged in an asymmetric system with respect to the vibration isolating material 135 in the vertical direction, and the exhaust fan 122-2 is arranged in the asymmetrical system with respect to each vibration isolation material 135 in the left and right direction. An example is shown. Of course, it is not limited to such an arrangement form, which vibration isolator 135 is arranged in an asymmetric system, and its arrangement position is set based on the above-described viewpoints of resonance suppression and noise reduction. Good.

  Furthermore, as shown in FIG. 2A, the fan case 131 preferably has a gap material 136 made of, for example, a cushion material at a joint portion between the fan case 131 and the heat radiating member 123. By comprising in this way, the ventilation | gas_flowing amount which passes the heat radiating member 123 can be enlarged more by interrupting | blocking the cooling air which ventilates the clearance gap between the heat radiating member 123 and the fan case 131. FIG. Further, noise caused by contact between the fan case 131 and the heat radiating member 123 or noise generated by an electromagnetic field is prevented, and when the device body 102 or the fan case 131 is subjected to an impact, the heat radiating member 123 is connected to the fan case 131. It is possible to prevent contact and deformation.

As described above, according to the fan case 131 provided in the cooling structure of the second embodiment, the air blowing capability of the exhaust fan 122 can be utilized more greatly than the fan case 121 in the first embodiment, and the capability is improved. Even with a small fan, a large air flow can be obtained.
The cooling structure according to the second embodiment having such a fan case 131 has the effect of the cooling structure 101 according to the first embodiment described above. Further, the modification described in the cooling structure 101 in the first embodiment is also applicable to the cooling structure in the second embodiment.

101 cooling structure, 102 device body,
111 Housing, 112 Intake side, 113 Exhaust side, 117 Electronic equipment,
121 fan case, 122 exhaust fan, 123 heat dissipation member,
131 fan case, 132 partition plate, 135 anti-vibration material, 136 gap material,
312 Intake port, 313 Exhaust port.

Claims (9)

A housing having an intake side having an intake port, and an exhaust side surface located opposite to the intake side and having an exhaust port;
Electronic equipment housed between the intake side and the exhaust side in the housing;
An exhaust fan which is provided between the electronic device and the exhaust port and forms an airflow flowing from the intake port to the exhaust port;
A cooling structure that houses the exhaust fan and includes a fan case disposed adjacent to the exhaust side surface,
This cooling structure is a structure that cools the electronic equipment housed in the casing of the video equipment,
The electronic device is a laser light source that generates laser light to be irradiated on the screen back surface of the video device,
The housing, which has a frame surrounding the screen for displaying an image, the intake side and the exhaust side surface of the housing, at a position close to the laser light source than the frame, viewed from the screen back side And a cooling structure provided on the inner side of the frame . A plurality of the exhaust fans are provided, and each exhaust fan is a fan for discharging swirling air, and the rotation direction thereof is the same direction.
The fan case contains a plurality of the exhaust fans, each exhaust fan is disposed to face the exhaust port, and has a partition plate extending in the exhaust direction between adjacent exhaust fans. 2. The cooling structure according to 1.   The cooling structure according to claim 2, wherein, in the partition plate, an exhaust port side end located on the exhaust port side is in contact with the fan case.   The cooling structure according to claim 2 or 3, wherein the partition plate has a shape that tapers as it moves away from the exhaust fan.   The cooling structure according to any one of claims 1 to 4, wherein an exhaust side of the fan case connected to the exhaust port has a shape expanding toward an exhaust direction. A housing having an intake side having an intake port, and an exhaust side surface located opposite to the intake side and having an exhaust port;
Electronic equipment housed between the intake side and the exhaust side in the housing;
An exhaust fan which is provided between the electronic device and the exhaust port and forms an airflow flowing from the intake port to the exhaust port;
A cooling structure that houses the exhaust fan and includes a fan case disposed adjacent to the exhaust side surface,
This cooling structure is a structure that cools the electronic equipment housed in the casing of the video equipment,
The electronic device is a laser light source that generates laser light to be irradiated on the screen back surface of the video device,
The housing has a frame surrounding a screen for displaying an image, and at least one of the intake side and the exhaust side of the housing is provided at a position closer to the laser light source than the frame,
A heat receiving plate for receiving heat from the laser light source;
A heat dissipating member that dissipates heat from the heat receiving plate;
A heat transport member that transports heat from the heat receiving plate to the heat radiating member,
The heat dissipating member extends so as to face the exhaust port, and includes a plurality of the exhaust fans, and the plurality of exhaust fans are arranged along the extending direction of the heat dissipating member,
The fan case accommodates the plurality of exhaust fans and the heat dissipation member,
A video signal or audio signal processing circuit is further provided between the laser light source and the intake side surface ,
A cooling structure characterized by that .   The said fan case is arrange | positioned on the opposite side to the said exhaust port with respect to the said exhaust fan, and further accommodates the heat radiating member which radiates the heat which the said electronic device generate | occur | produces. The cooling structure described. A plurality of the exhaust fans are provided, each exhaust fan is a fan for discharging swirling air, and the fan case accommodates the plurality of exhaust fans, and each exhaust fan is disposed to face the exhaust port. The cooling structure according to claim 1 or 6 , wherein the adjacent exhaust fans have the fans rotating in opposite directions. A heat receiving plate that receives heat generated from the laser light source, and a heat radiating member that is accommodated in the fan case and extends so as to face the exhaust port, and dissipates heat from the heat receiving plate. Item 2. The cooling structure according to Item 1.

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