JP2006196504A - Cooling device and electric apparatus using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cooling device having a heat generation component inside, where clogging of a filter removing dust is prevented in cooling air, the heat generation component can be cooled with clean air even if a fan is reversely rotated and sufficient cooling can be performed even if a calorific value is large. <P>SOLUTION: First air including dust taken in from outside by negative pressure generated by a sirocco fan 1i forms air current circulating inside a cylindrical container 1c. Dust is centrifugally separated from air by circulating air current, and is collected into a case 1e. Clean second air where dust and the like are separated is sucked into a container 1g through a duct 1h by negative pressure. Clean second air is exhausted from an exhaust duct 1b by the sirocco fan 1i, and is blown to a high pressure discharge lamp 3. Thus, a cooling operation of the electric apparatus 2 is performed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an electric device having a heating element, for example, an electric device such as a projection display device having a high-pressure discharge lamp or the like therein. The present invention relates to a cooling device for air cooling.

  Generally, a heating element such as a lamp, a motor, or a semiconductor component is present inside an electric device. In such an electrical device, when the internal temperature of the electrical device rises due to heat generated by the heating element, not only does it cause abnormal operation of the heating element itself or parts near the heating element, but also the electrical device. It may cause failure, destruction or shortening of the service life. For this reason, external air is taken into the electric equipment by a blower such as a fan to cool the heat-generating component, and the temperature rise is suppressed. However, when taking in outside air, dust, dust, and other unnecessary materials (hereinafter referred to as dust) contained in the air enter the inside of the electrical equipment together with the air, so the quality, reliability, or safety of the electrical equipment May decrease.

  For example, taking a projection display device as an example, when dust or the like enters a projection unit inside the projection display device, the quality of the image deteriorates if the dust or the like adheres to an optical component in the projection unit. In addition, if dust or the like adheres to the movable part of the projection display device, the movement of the movable part is hindered, or wear of the movable part is caused to induce a failure, thereby impairing reliability. Furthermore, if dust or the like adheres to an insulating material, the insulating performance is deteriorated, which may lead to the destruction of the projection display device or the shortening of the service life, thereby impairing safety. On the other hand, in a conventional cooling device, dust and the like are removed using a filter when taking in outside air (for example, Patent Document 1). Further, in other conventional cooling devices, heat-generating components in the electrical equipment are sealed, and security measures have been taken so that performance is not deteriorated even if dust or the like enters the electrical equipment (for example, Patent Document 2 and Patents). Reference 3).

JP 09-130713 (2nd and 3rd pages) JP 2004-45990 (page 4, FIG. 1) JP 08-125364 (2nd page, FIG. 1)

  When a filter is used when taking in external air as in a conventional cooling device, the filter is clogged with dust or the like, and air hardly passes through the filter, resulting in a problem that cooling efficiency is lowered. In order to solve this problem, in the improved cooling device, a method of increasing the surface area of the filter to make it a winding type (for example, Patent Document 1), or a method of controlling the amount of air taken in based on the temperature inside the electrical equipment For example, the filter of the filter is prevented by applying Patent Document 4). However, these improved cooling devices are not different from the prior art in that only the filter removes dust and the like. Therefore, for example, when performing continuous operation for a long time or in an environment where a lot of dust is contained in the air, there is a problem that clogging of the filter cannot be essentially prevented. In another improved cooling device, clogging is prevented by blowing off dust or the like adhering to the filter by reverse rotation of the fan (for example, Patent Document 5). However, in this case, since the fan is rotated in reverse, it cannot be applied to electrical equipment that requires continuous cooling, and is ineffective for large dust that cannot be blown away even when the fan is rotated in reverse. . In addition, another problem that dust blown off diffuses into the outside air and deteriorates the surrounding environment.

  On the other hand, when the heat generating components are sealed like other conventional cooling devices, there is a problem that they cannot be sufficiently cooled. For example, in the projection type display device exemplified above, a light source such as a high-pressure discharge lamp that is usually used generates a very large amount of heat, and cannot be sufficiently radiated if a sealed structure is used. As a result, the projection display device may be damaged or broken. That is, for an electrical device that generates a large amount of heat from the heat generator, it is essential to cool the heat-generating component by directly applying air.

  Furthermore, with only the above-described prior art, unnecessary items such as broken parts (hereinafter referred to as broken pieces) are generated inside the electric device for some reason, for example, when the high-pressure discharge lamp in the projection display device is broken. When this occurs, the fragments and the like are carried to the exhausted gas and diffused to the outside. As a result, there is a problem that the surrounding environment is contaminated by debris and the like.

JP 09-180427 (2nd, 3rd page, FIG. 1) JP 07-130161 (2nd page, FIG. 3)

  In the cooling device according to the present invention, the first air taken in from the air inlet is separated from the container that forms an air current that swirls inside, and the first air that is spatially connected to the inside of the container and swirls. A dust collecting unit for storing unnecessary materials, a duct for sucking out the second air from which the unnecessary materials are centrifuged, and a negative pressure to generate the first air into the container. And a blower that generates a positive pressure and sends the second air to the heat-generating component.

  According to this invention, since air containing dust or the like is taken into the container of the cooling device and the air is swirled in the container to centrifuge the dust or the like, the air that does not contain dust or the like can be cooled without using a filter. The heat generating parts can be cooled by discharging from Moreover, since no filter is used, clogging does not occur essentially, and sufficient cooling can be achieved even when the amount of heat generation is large. Also, if a filter is used in combination with the cooling device, in addition to increasing the dust collection capability, the filter is less likely to become dirty than when only the filter is used, so the resistance when inhaling outside air is kept low. It is possible to prevent a reduction in intake efficiency.

  Further, according to the present invention, after the cooling device inhales the air that has cooled the heat-generating component, the air is swirled in the container to centrifuge the dust and the like, so that the fragments of the component caused by some cause in the electrical equipment This is effective in preventing the surrounding environment from being polluted. For example, when a high-pressure discharge lamp or the like mounted in an electrical device reaches the end of its life and breaks, there is an effect of preventing the risk of fine glass fragments being scattered outside the electrical device.

  Further, according to the present invention, by disposing the heat generating component in the container in which the air in the cooling device swirls, dust or the like together with the taken-in air enters the electric equipment and adheres to the heat generating component. However, since the swirling air hits the heat generating component, dust and the like can be separated from the heat generating component, so that there is an effect of preventing contamination of the heat generating component. In this case, since the heat generating component is cooled by the swirling gas, the air to be cooled is agitated, and the temperature distribution of the heat generating component can be made uniform.

  In addition, according to the present invention, by using the filter in combination with the cooling device that takes in the air heated by the heat-generating component, the effect of preventing the fragments and the like of the component from being discharged out of the electrical equipment and harming the environment and the human body is enhanced. be able to. In this case, since the contamination of the filter can be suppressed as compared with a cooling device that collects dust only with the filter, the resistance when exhausting the air in the electrical equipment can be kept low, and the exhaust efficiency is reduced. Can be prevented.

  Moreover, according to this invention, since unnecessary objects, such as dust, can be collected in a predetermined place, this can be removed easily.

  Moreover, according to this invention, since it is not necessary to apply a filter to a cooling device, the operation | movement which reversely rotates a fan becomes unnecessary and there exists an effect which can simplify control.

Hereinafter, the present invention will be specifically described with reference to the drawings showing embodiments thereof. In the first embodiment, the case where the high pressure discharge lamp of the projection display device is cooled by the cooling device according to the present invention will be described as an example.
Embodiment 1 FIG.
FIG. 1 is a perspective view of the projection display device 2 when the cooling device 1 according to the first embodiment is arranged at the cooling air intake 2a of the projection display device 2 which is an electric device. In FIG. 1, the air flow is indicated by dotted arrows. The first air containing dust, which is an unnecessary material, taken from the cooling air intake 2a of the projection display device 2 is taken into the cooling device 1 from the intake duct 1a of the cooling device 1. The cooling device 1 removes dust and the like contained in the taken-in air from the air, and exhausts clean air as second air from the exhaust duct 1b. The clean air exhausted from the exhaust duct 1b is blown as cooling air to the high-pressure discharge lamp 3 which is a heat-generating component, separated from the cooling device 1 inside the projection display device 2 and provided near the exhaust duct 1b. It is turned on. The high-pressure discharge lamp 3 is turned on and generates heat during operation of the projection display device 2 and is cooled by cooling air. After cooling the high pressure discharge lamp 3, the cooling air is exhausted from the cooling air outlet 2 b of the projection display device 2 to the outside.

  Next, the cooling device 1 will be described. FIG. 2 is a perspective view of the cooling device 1. In FIG. 2, an intake duct 1 a is attached to the outer surface of a bottomed cylindrical container 1 c which is a container that forms an air flow in which the first air swirls, in parallel to the tangent line of the container 1 c. Furthermore, the intake duct 1a spatially connects the inside and the outside of the container 1c at an opening 1d provided on the inner wall surface of the container 1c so that air can be sent into the container 1c from the outside. On the other hand, a case 1e, which is a dust collecting portion, is detachably attached to the lower portion of another outer surface of the container 1c, and discharges dust and the like from a discharge port 1f provided on the side surface of the container 1c. The case 1e is configured to collect dust. Further, on the upper side of the container 1c, a bottomed cylindrical container 1g having the same central axis as the container 1c is provided. The container 1c and the container 1g are spatially connected by a cylindrical duct 1h in the vicinity of the central axis. The duct 1h extends to the vicinity of the center of the height of the container 1c. Further, a sirocco fan 1i that is a blower is provided above the container 1g, and is spatially connected to the container 1g. Then, the air in the container 1g is discharged from the exhaust duct 1b to the outside of the cooling device 1 by the sirocco fan 1i.

  Next, the operation of cooling the high pressure discharge lamp 3 by the cooling device 1 will be described. The cooling device 1 is a device that applies a cyclone dust collection technique to cooling. In the cooling device 1, negative pressure is generated by the rotation of the sirocco fan 1i. The generated negative pressure is applied to the intake duct 1a through the spatially connected container 1g, duct 1h, and container 1c. Due to the negative pressure applied to the intake duct 1a, air containing dust or the like existing outside the cooling device 1 is taken into the container 1c. Here, the intake duct 1a is installed so as to suck in air from the tangential direction of the cylindrical curved surface that is the inner wall surface so that the sucked air forms an airflow that swirls along the inner wall surface of the container 1c. For this reason, the air sucked into the container 1c from the intake duct 1a through the opening 1d is the central axis of the bottomed cylindrical container 1c along the inner wall surface of the container 1c as shown by a dotted arrow D0 in FIG. An airflow swirling around (not shown) is formed.

  The air swirling in the container 1c usually contains dust or the like as described above. However, when the air swirls inside the container 1c, centrifugal force acts on these dusts and the like, and the dust is unevenly distributed near the inner wall surface of the container 1c. Dust and the like that are unevenly distributed in the vicinity of the inner wall surface move along the inner wall surface by the swirling airflow, eventually reach the discharge port 1f, and are collected in the case 1e as indicated by the dotted arrow D1 in FIG.

  On the other hand, the air in the container 1c is sucked into the container 1g through the duct 1h by the negative pressure generated by the sirocco fan 1i, as indicated by the dotted arrow D2 in FIG. At this time, since the duct 1h is installed near the central axis of the container 1c, only the air near the center of the container 1c is sucked and the air near the inner wall surface of the container 1c is not sucked. For this reason, only the clean air which does not contain dust etc. unevenly distributed near the inner wall surface can be sucked into the container 1g. That is, dust or the like collected near the inner wall surface of the container 1c by centrifugal force is always collected in the case 1e as indicated by the arrow D1, and is not sucked into the container 1g as indicated by the arrow D2. In Embodiment 1, dust etc. are removed from the taken-in air by such a cyclone type dust collection technique. In Embodiment 1, the case 1e itself is detachable from the cooling device 1, and dust collected in the case 1e can be easily removed by removing the case 1e.

  The clean air sucked into the container 1g is sucked out of the container 1g by the negative pressure generated by the sirocco fan 1i, and discharged out of the cooling device 1 from the exhaust duct 1b. The exhausted clean air is blown to the high-pressure discharge lamp 3 by the positive pressure generated by the sirocco fan 1i, as shown by the dotted arrow in FIG. 1, and the heat generated by the high-pressure discharge lamp 3 is taken away. Cooling. The clean air from which heat has been removed is exhausted to the outside from the cooling air discharge port 2b of the projection display device 2 as it is. As described above, in the first embodiment, the cyclone type dust collection technology that separates dust and the like from the air by swirling the air inside the container 1c is applied to cooling, and the air from which dust and the like are separated is used as a high-pressure discharge lamp. The high pressure discharge lamp 3 can be cooled by clean air.

  In the first embodiment, the external air is directly taken into the cooling device 1, but a net or the like is attached to the cooling air inlet 2a, the intake duct 1a, or the opening 1d so that large dust or the like does not enter. It is good also as a structure. Moreover, it is good also as a structure which attaches a filter to the container 1g or the sirocco fan 1i. When the filter is mounted, for example, even if there is dust that could not be removed by the container 1c, it can be removed by the filter. FIG. 3 shows an example in which the filter 1j is inserted between the container 1g and the sirocco fan 1i. By inserting the filter 1j in this way, it becomes possible to remove fine dust that cannot be removed by the container 1c. Note that the filter 1j in this case can be removed by a sliding method or the like so that it can be easily replaced.

  In the first embodiment, the description has been given using the configuration in which the intake duct 1a is provided on the outer surface of the container 1c. However, even if the intake duct 1a is integrated with the container 1c, the inside of the container 1c is formed through the opening 1d. The same effect can be obtained if the configuration is such that external air is taken in from the tangential direction of the wall surface.

  Further, in the first embodiment, the case 1e itself is configured to be detachable. However, for example, the collected dust or the like may be easily taken out by adopting a configuration in which a lid, a drawer, or the like is attached. Further, the case 1e may be a transparent container, and in this case, it is possible to check the collection state of dust and the like without removing the case 1e. Further, the case 1e is provided at the lower portion of the outer surface of the container 1c, but this is not always necessary. If the case 1e is spatially connected to the container 1c by the discharge port 1f provided on the side surface of the container 1c, the case 1e can obtain the same effect as a dust collecting portion.

  Further, in the first embodiment, the container 1g and the container 1c are integrally configured and connected by the duct 1h. However, for example, the container 1g and the container 1c may be configured such that they can be separated. As a result, the inner wall surface of the container 1c can be easily cleaned by removing the container 1g. Further, the sirocco fan 1i may be configured to be removable from the container 1g. As a result, the inside of the container 1g can be easily cleaned and the blades and motors of the sirocco fan 1i can be easily replaced. Further, the container 1g may be reduced, and the sirocco fan 1i may be connected to the duct 1h so that the sirocco fan 1i directly sucks air out of the container 1c. In this case, the configuration can be simplified by reducing the container 1g, The manufacturing process of the cooling device 1 can be simplified and the cooling device 1 can be manufactured at low cost.

  Further, in the first embodiment, the duct 1h has been described as extending to the vicinity of the center in the height direction of the container 1c as shown in FIGS. 1 and 2, but this is not always necessary. Even if the duct 1h is made longer or shorter, the same effect can be obtained. Moreover, although the duct 1h is cylindrical, it may be rectangular. Furthermore, the duct 1h can be reduced, and only a vent hole spatially connected to the container 1g can be installed in the vicinity of the upper center axis of the container 1c. In this case, the configuration can be simplified by reducing the number of ducts 1h, the manufacturing process of the cooling device 1 can be simplified, and the cooling device 1 can be manufactured at low cost. Moreover, you may provide the hole and slit which suck | inhale the air in the container 1c in the side surface of the duct 1h.

  Further, in the first embodiment, the blower is described as being a sirocco fan 1i as shown in FIGS. 1 and 2, but this is not always necessary, and for example, an axial fan 1k may be used as shown in FIG. it can. FIG. 4 is a perspective view of another cooling device 1, and the same components as those in FIG. In the first embodiment, as shown in FIGS. 1 and 2, the sirocco fan 1i has the central axis of the container 1c, that is, the central axis of the swirling airflow and the central axis of the sirocco fan 1i installed in parallel. It can also be installed in a positional relationship having an arbitrary angle. In the first embodiment, negative pressure is generated by the sirocco fan 1i so that air is sucked into the container 1c from the intake duct 1a. However, for example, by installing the sirocco fan 1i outside the intake duct 1a, It goes without saying that a configuration may be adopted in which a positive pressure is generated and gas is blown into the container 1c.

  Further, in the first embodiment, the cooling device 1 is installed so that the plane on which the projection display device 2 is installed and the rotation axis around which the air swirls in the container 1c of the cooling device 1 is vertical. It is not always necessary, and can be installed in a positional relationship having an arbitrary angle.

  Further, in the first embodiment, the case 1e of the cooling device 1 has been described as being provided on the outer surface of the container 1c, but this is not necessarily provided on the outer surface. For example, as shown in FIG. 5, the lower part of the container 1c has a conical shape, a case 1e is provided thereunder, and the container 1c and the case 1e are spatially connected by removing the bottom surface of the container 1c to form a discharge port 1f. It is good also as composition to do. FIG. 5 is a perspective view of another cooling device 1, and the same components as those in FIG. Also in this case, dust and the like are unevenly distributed in the vicinity of the inner wall surface of the container 1c due to the centrifugal force of the swirling airflow as indicated by the dotted arrow D0 in FIG. Thereafter, a large number of dusts gather to form heavy dusts, and these heavy dusts fall by gravity along the inner wall surface of the conical portion from the container 1c through the outlet 1f to the case 1e. It is collected at. Note that the outer shape of the case 1e in this case is circular as shown in FIG. 5, but it is not necessary to be circular, and may be any shape.

Embodiment 2. FIG.
In the first embodiment, the case where the cooling device 1 is arranged in the cooling air inlet 2a of the projection display device 2 has been described. On the other hand, in the second embodiment, a case where the cooling device 11 is arranged in the cooling air discharge port 2b of the projection display device 2 will be described. FIG. 6 is a perspective view showing the projection display device 2 according to the second embodiment, and corresponds to FIG. 1 of the first embodiment. In FIG. 6, unlike FIG. 1, the cooling device 11 is installed at the cooling air outlet 2 b of the projection display device 2. The cooling device 11 has a configuration similar to that of the cooling device 1 shown in FIG. 2 of the first embodiment, and is the other cooling device 1 shown in FIG. Specifically, the sirocco fan 1i of the cooling device 1 is replaced with an axial fan 1k, and the exhaust duct 1b is further removed. In addition, about the part same as the cooling device 1 in the cooling device 11, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  In FIG. 6, the air taken in from the cooling wind inlet 2a of the projection display device 2 is blown to the high-pressure discharge lamp 3 as cooling air. This is because the cooling device 11 takes in the air in the vicinity of the high-pressure discharge lamp 3, and more specifically, the negative pressure generated by the axial fan 1k of the cooling device 11 is applied to the cooling air inlet 2a. is there. The high-pressure discharge lamp 3 is turned on and generates heat during operation of the projection display device 2 and is cooled by cooling air. The cooling air cools the high-pressure discharge lamp 3 and then is taken into the cooling device 1 from the intake duct 1 a of the cooling device 1. Based on the operation described in the first embodiment, the cooling device 1 removes dust and the like contained in the taken-in air from the air and exhausts clean air from the axial fan 1k. As shown in FIG. 6, the exhaust surface of the axial flow fan 1k is the cooling air discharge port 2b of the projection display device 2 as it is, so that clean air exhausted from the cooling device 1 is exhausted to the outside. .

  As described above, the air sucked from the cooling air inlet 2a cools the high-pressure discharge lamp 3 in the projection display device 2. For example, when the high-pressure discharge lamp 3 is broken, fragments and the like are projected on the projection display device. 2 may be scattered. In the second embodiment, these fragments and the like are taken in by the cooling device 1 by the cooling air, so that the fragments and the like can be separated from the air and collected in the case 1e of the cooling device 11. Then, the cleaned air is exhausted from the cooling device 11 to the outside of the projection display device 2.

  Specifically, the case where the high-pressure discharge lamp 3 in the projection display device 2 is broken will be described while showing the structure of the high-pressure discharge lamp 3. FIG. 7 is a view showing the high-pressure discharge lamp 3. In this type of lamp, a light source portion for discharging is generally sealed with glass, and the sealed interior has a high pressure. The light radiated from the burner 3a, which is a light source portion sealed with glass, is changed to illumination light in the direction of arrow L shown in FIG. 7 by the reflector 3b. Further, a windshield 3c is provided on the front surface of the burner 3a in the radial direction to prevent the glass from scattering when the burner 3a is ruptured.

  Here, if the burner 3a is hermetically sealed with the windshield 3c and the reflector 3b, the glass can be prevented from scattering outside the high-pressure discharge lamp 3 even if the burner 3a is damaged. However, in the high-power high-pressure discharge lamp 3 used in the normal projection display device 2, when the burner 3a is sealed with the reflector 3b and the windshield 3c, the internal temperature of the high-pressure discharge lamp 3 is significantly increased. Therefore, normally, in order to suppress the rise in the internal temperature, a vent 3d is provided around the burner 3a as shown in FIG. The number of vents 3d is not limited to two as shown in FIG. 7, and a plurality of vents 3d may be provided.

  Further, there is a high-pressure discharge lamp 3 that does not include the windshield 3c in order to suppress an increase in internal temperature. In this case, since there is no windshield 3c, if the burner 3a breaks, broken pieces of glass are scattered around the high-pressure discharge lamp 3, and these broken pieces are mixed into the cooling air and discharged out of the projection display device 2. There is a case. According to the second embodiment, fragments and the like mixed in the cooling air described above can be collected in the case 1e by the cooling device 11, so that the fragments and the like are scattered outside the projection display device 2 and the surrounding environment is reduced. It has the effect of preventing contamination.

Embodiment 3 FIG.
In the first embodiment, the case where the high pressure discharge lamp 3 is cooled by blowing clean air from which dust or the like has been removed by the cooling device 1 to the high pressure discharge lamp 3 has been described. On the other hand, in Embodiment 3, the high-pressure discharge lamp 3 is housed in the container 1c of the cooling device 12, and the high-pressure discharge lamp 3 is cooled by the airflow swirling in the container 1c. The cooling device 12 has a configuration similar to that of the cooling device 11 shown in FIG. 6 of the second embodiment. Specifically, the cooling device 12 is different in that the high-pressure discharge lamp 3 is stored in the container 1 c inside the cooling device 12. Moreover, about the part same as the cooling device 11 in the cooling device 12, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  FIG. 8 is a diagram illustrating the cooling device 12 according to the third embodiment. The same components as those in FIG. 4 are denoted by the same reference numerals and description thereof is omitted. As shown in FIG. 8, the cooling device 12 in the third embodiment includes a high-pressure discharge lamp 3 in a container 1c. The air sucked from the intake duct 1a of the cooling device 1 as shown by the dotted arrow is taken into the container 1c, and inside the container 1c as shown by the dotted arrow C0 in FIG. Turn along. Inside the container 1c, a high-pressure discharge lamp 3 is installed at a location where a swirling air current blows and at a position where the swirling air current is not obstructed as much as possible. In general, the outer shape of the high-pressure discharge lamp 3 is often a conical shape derived from the shape of the reflector 3b as shown in FIG. 7, and specifically, the air flow swirling around the central axis of the conical shape and the inside of the container 1c. The high pressure discharge lamp 3 is installed so that the rotation axes of the two coincide.

  When installed as described above, the swirling airflow flows along the outer periphery of the reflector 3b of the high-pressure discharge lamp 3 as indicated by an arrow C0, and heat is taken from the reflector 3b to cool the high-pressure discharge lamp 3. A part of the swirling airflow enters the inside of the high-pressure discharge lamp 3 through the vent 3d provided in the high-pressure discharge lamp 3 as shown by the dotted arrow C1 in FIG. 8, and cools the burner 3a. Further, the swirling airflow cools the high-pressure discharge lamp 3, and at the same time, dust, etc. present around the high-pressure discharge lamp 3, dust that comes from the outside and adheres to the high-pressure discharge lamp 3, or damage to the high-pressure discharge lamp 3 Blow off the fragments and the like generated by the above, and collect these in the case 1e. From the duct 1h, clean air from which dust and the like are removed is taken into the container 1g. Subsequent operations are the same as those in the second embodiment, and are therefore omitted.

  By configuring as described above, the high pressure discharge lamp 3 can be cooled without hindering the airflow swirling in the container 1c. Moreover, since the swirling airflow is used to cool the high-pressure discharge lamp 3, the cooling is not localized, and the air around the high-pressure discharge lamp 3 is agitated, so that the whole can be cooled uniformly. be able to. Moreover, since the cooling device 12 has a configuration in which the cooling device and the high-pressure discharge lamp 3 are integrated, the projection display device 2 can be made compact. Furthermore, even when the burner 3a, which is a light source in the high-pressure discharge lamp 3, is broken, debris and the like generated by the breakage can be collected by the case 1e of the cooling device 12. For this reason, it is possible to obtain an effect of preventing contamination of the surrounding environment without debris scattering to the outside.

  In the third embodiment, the cooling device 12 has been described so that the irradiation light from the high-pressure discharge lamp 3 is in the horizontal direction. However, this is not necessarily limited to the horizontal direction, but in any direction. There may be.

Embodiment 4 FIG.
In the first to third embodiments, the case where one cooling device is applied to one projection display device 2 has been described. On the other hand, in the fourth embodiment, a plurality of cooling devices are applied to one projection display device 2.

  FIG. 9 is a diagram illustrating the projection display device 2 according to the fourth embodiment, and more specifically is a diagram illustrating the rear projection projector 4. The rear projection projector 4 in FIG. 9 is applied with the cooling device 1 shown in the first embodiment and the cooling device 12 shown in the third embodiment. In the rear projection type projector 4 shown in FIG. 9, the projection unit 4 a projects an image using light output from the high-pressure discharge lamp 3 provided in the cooling device 12. The light of the image output from the projection unit 4a is reflected by the reflecting mirror 4b, and the light reflected by the reflecting mirror 4b is displayed as an image by the transmissive screen 4c, thereby exhibiting a function as a projector.

  In FIG. 9, the cooling device 1 described in the first embodiment is arranged in the cooling wind inlet 2 a of the rear projection type projector 4 in the same manner as in the first embodiment. That is, it arrange | positions so that the cooling device 1 may take in external air from the cooling wind inlet 2a by the intake duct 1a. Since the cooling device 1 performs the same operation as the cooling device 1 in the first embodiment, a detailed description of the operation is omitted. The cooling device 1 collects dust and the like contained in the air taken into the rear projection projector 4, and clean air is blown onto the projection unit 4a. The blown clean air rises inside the rear projection type projector 4 and cools the reflecting mirror 4b and the transmissive screen 4c. At this time, dust or the like inside the rear projection type projector 4 is taken in and lowered again.

  On the other hand, the high pressure discharge lamp 3 of the rear projection type projector 4 is provided with the cooling device 12 described in the third embodiment. Since the cooling device 12 performs the same operation as the cooling device 12 in the third embodiment, a detailed description of the operation is omitted. The cooling device 12 takes in the air that has circulated and descended through the rear projection type projector 4 and is generated when dust or the like inside the rear projection type projector 4 contained in the air or the high pressure discharge lamp 3 is damaged. Collect debris.

  The rear projection type projector 4 seals the outside air only from the cooling device 1 disposed in the cooling air inlet 2a while discharging the inside air only from the cooling device 12 in which the high-pressure discharge lamp 3 is incorporated, or By reducing structural gaps and the like, it is configured so that outside air does not enter and exit as much as possible. Thereby, dust or the like contained in the outside air is removed by the cooling device 1, and clean air is sucked into the rear projection type projector 4. This clean air prevents dust and the like from adhering to the reflecting mirror 4b reflecting the light from the projection unit 4a and the transmissive screen 4c, so that the reflection efficiency of the light is reduced and the image is not darkened. Obtainable. Further, by using this clean air for cooling the projection unit 4a, it is possible to prevent the internal parts of the projection unit 4a from being contaminated, and to prevent performance deterioration and reliability deterioration. The clean air is further drawn into the cooling device 12 to cool the high-pressure discharge lamp 3 and prevent contamination, and is discharged to the outside of the rear projection type projector 4. The cooling device 12 collects dust by centrifuging these debris even if the lamp is broken and debris is mixed in the air, so the debris is discharged to the outside and pollutes the external environment. The effect of preventing this can be obtained.

  In the above description, the projection display device has been described as an example of the electric device to which the cooling device according to the present invention is applied. However, the present invention is not limited to the projection display device, but other electric devices such as a personal computer, a television, a video, an air conditioner, or a heater. Needless to say, it can also be applied to equipment.

It is a perspective view of the projection type display apparatus used for Embodiment 1 of this invention. It is a perspective view of the cooling device used for Embodiment 1 of this invention. It is a figure which shows a part of cooling device used for Embodiment 1 of this invention. It is a perspective view of the other cooling device used for Embodiment 1 of this invention. It is a perspective view of the other cooling device used for Embodiment 1 of this invention. It is a perspective view of the projection type display apparatus used for Embodiment 2 of this invention. It is a figure which shows the high pressure discharge lamp used for Embodiment 2 of this invention. It is a perspective view of the cooling device used for Embodiment 3 of this invention. It is a figure which shows the rear projection type projector used for Embodiment 4 of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 11, 12 Cooling device 1c Container 1e Case 1h which is a dust collecting part Duct 1i Sirocco fan 1k which is a blower Axial fan 2 Projection type display device 3 High pressure discharge lamp 4 Rear projection type projector

Claims (8)

A container that forms an air flow in which the first air taken in from the air inlet swirls;
A dust collecting unit for storing unnecessary matter centrifuged from the first air that is spatially connected to the inside of the container and swirls;
A duct for sucking out the second air from which the unwanted matter has been centrifuged out of the container;
A cooling device comprising: a blower that generates a negative pressure and takes the first air into the container, and generates a positive pressure and sends the second air to a heat generating component. A container that forms an air flow in which the first air that is sent to the heat-generating component, cools the heat-generating component, and is taken in from the air inlet, swirls inside;
A dust collecting unit for storing unnecessary matter centrifuged from the first air that is spatially connected to the inside of the container and swirls;
A duct for sucking out the second air from which the unwanted matter has been centrifuged out of the container;
A cooling device comprising: a blower that generates negative pressure and sends the first air to a heat-generating component to be taken into the container, and generates positive pressure and exhausts the second air. A container configured to form an air flow in which the first air taken in from the air intake swirls, and to cool the heat-generating component contained therein by the air flow;
A dust collecting unit for storing unnecessary matter centrifuged from the first air that is spatially connected to the inside of the container and swirls;
A duct for sucking out the second air from which the unwanted matter has been centrifuged out of the container;
A cooling apparatus comprising: a blower that generates a negative pressure to take in the first air into the container and generates a positive pressure to exhaust the second air.   The cooling device according to any one of claims 1 to 3, wherein the blower is connected to a duct and exhausts the second air.   The cooling device according to any one of claims 1 to 3, wherein the blower is connected to the container and sends the first air taken in from the intake port to the inside of the container.   6. The cooling device according to claim 1, wherein the heat generating component is a lamp for a display device. Heat-generating parts,
An electrical apparatus comprising the cooling device according to any one of claims 1 to 6, which cools a heat-generating component.   The electric device according to claim 7, wherein the heat generating component is a lamp that emits illumination light or an optical system that outputs an image using the illumination light, and includes a screen on which the image is projected.

Images