JP2006047914A - Projector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a projector capable of enhancing cooling efficiency by cooling not only a light source unit but also the inner side of a housing. <P>SOLUTION: The projector is equipped with the light source unit 10 which emits light, an optical constitution section 20 which constitutes an optical system for modulating or putting together the projection light from the light source unit 10, a projection section 30 which projects the projection light from the optical constitution section, a cooling flow passage 50 where cooling liquid for cooling the light source unit 10 is circulated, and the housing 70 which constitutes the exterior, and is characterized in that the housing 70 is equipped with a 1st opening section 80a which is formed in the housing upstream in a gas flowing direction and a 2nd opening section 80b which is formed downstream. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a projector, and more particularly to a projector that circulates a cooling fluid to cool a light source device.

  In recent years, high brightness and miniaturization of projectors have been promoted, and the heat density in the apparatus has increased compared with the conventional projector. Therefore, further improvement in cooling performance has been required particularly for a cooling device that cools a light modulation element such as a light source that is a heat generation source or a light valve that is heated by receiving light emitted from the light source device. ing. Under such circumstances, a projector using a light emitting diode (LED), which is a light emitting element, in the light source device is in the same situation, and further improvement in cooling performance is required.

  In the case of a projector using a light-emitting diode (LED) as a light-emitting element in the light source device, an illumination light with a uniform light intensity distribution on the irradiation surface is output using an LED array panel in which a plurality of LED elements are arranged. Thus, there has been proposed an illumination device as a light source for a projector (Patent Document 1).

  In the case of a projector using a cathode ray tube, a cooling tank is provided in contact with the surface of the cathode ray tube displaying an image, the cooling liquid is filled therein, and the cooling liquid is circulated to the cooling tank through a circulation mechanism. Thus, an apparatus for lowering the temperature of the cathode ray tube has been proposed (Patent Document 2).

In addition, in the case of a liquid crystal projector that irradiates the liquid crystal panel with light from a light source and projects a display image on the liquid crystal panel onto a screen, the liquid crystal panel is vaporized by heat in a container having transparent portions larger than the display area on the both sides Enclose a transparent cooling medium. The container is provided with a cooler having a vaporized refrigerant storage chamber in which the heat-absorbed and vaporized cooling medium is liquefied again and dissipated to the outside of the container, and a liquid crystal panel is disposed on one surface of the cooler to An apparatus for cooling the heat generated in the panel has also been proposed (Patent Document 3).
JP 2002-374004 A JP-A-8-242463 Public Open Hei 1-75288

  However, according to Patent Document 2, a metal tube or a heat radiating plate is used as a circulation mechanism to dissipate heat and cooling. However, when cooling is performed using a cooling fan, the casing of the casing that forms the exterior of the projector is used. Since it is necessary to install a cooling fan inside, there is a problem that the projector becomes very large. In addition, there is a problem that the use of a fan has a limit on the noise of the projector. According to Patent Document 3, there is a fan for cooling the cooling medium in the housing, and when the light source diode (LED) is used for the light source device in order to dissipate the heat in the housing to the outside of the housing by the fan. However, there is a problem that there is a limit on the miniaturization and noise of the projector.

  According to Patent Document 2, when a cooling fan is not used, cooling is performed using natural air cooling inside the housing, but when a cathode ray tube is used, the amount of heat generated by the cathode ray tube. Because the temperature difference is large, a temperature difference from the inside of the housing is secured, so that cooling can be performed. On the other hand, when a light emitting diode (LED) is used for the light source device, the calorific value itself is not large compared to the calorific value in the cathode ray tube, and the difference between the temperature of the circulating liquid and the temperature inside the housing is small. Therefore, there is a problem that the cooling efficiency is low in natural air cooling inside the housing.

Further, in order to solve the problems of Patent Documents 2 and 3 described above, the present inventors have studied a liquid cooling method in which a casing is provided with a heat dissipation channel. It was confirmed that the heat generation could not be efficiently cooled.
The present invention has been made in view of the above problems, and an object of the present invention is to provide a projector capable of improving the cooling efficiency by cooling not only the light source device but also the heat generated inside the housing.

The present inventors have found that heat is trapped inside the housing simply by adopting the liquid cooling method. Specifically, the heat generation in the projector is generally considered to be mainly due to the heat generation of the light source device, but the present inventors are not limited to the light source device but from semiconductor devices such as LSI and CPU. We paid attention to the fact that the fever of can not be ignored. Since such a semiconductor device is disposed inside the housing of the projector, it has been found that the heat generated by the semiconductor device is trapped inside the housing and cannot be removed and cannot be efficiently cooled. . Accordingly, it has been found that the cooling efficiency is insufficient only by providing a flow path for liquid cooling on the surface of the housing and cooling only the light source device.
Therefore, the present inventors have arrived at the present invention having the following means based on the above.

  That is, the projector according to the present invention includes a light source device that emits light, a light source device that emits light, an optical configuration unit that configures an optical system for modulating or combining light emitted from the light source device, and the optical configuration. A projection unit that projects light emitted from the unit, a cooling flow path for circulating a cooling fluid for cooling the light source device, and a casing that constitutes an exterior. 1 is provided with a first opening formed on the upstream side in the gas flow direction and a second opening formed on the downstream side.

In this way, the light source device, the semiconductor device, and the like inside the housing generate heat, and ascending airflow is generated inside the housing. Along with such an updraft, the gas outside the housing flows into the housing through the first opening, the gas flows from the first opening toward the second opening, and further the gas Flows out of the housing through the second opening. As the gas recirculates in this way, the heat generated inside the housing is dissipated.
Therefore, compared with the case where the first opening and the second opening are not formed in the housing, gas does not stay inside the housing, and heat does not accumulate inside the housing. Heat generated inside the housing can be dissipated outside the housing.
Furthermore, since the present invention has a configuration in which the light source device is cooled by the flow of the cooling fluid, the inside of the housing and the light source device can be cooled together, and the cooling efficiency of the projector is improved by these synergistic effects. Can be made.

In the projector described above, the first opening is formed on the lower surface side of the casing, and the second opening is formed on the upper surface side of the casing.
In this way, the gas (air) outside the housing flows from the lower surface side of the housing, the gas flows from the lower surface side of the housing toward the upper surface side of the housing, and the gas further flows into the housing. Flows out of the housing from the upper surface side. As the gas recirculates in this manner, the inside of the housing is cooled. Therefore, no gas stays inside the housing, and heat does not stay inside the housing, so that heat generated inside the housing can be dissipated outside the housing.

In the projector described above, the first opening is formed on a lower surface side of the housing, and the second opening is formed on a side surface of the housing.
In this way, the gas outside the housing flows in from the lower surface side of the housing, the gas flows from the lower surface side of the housing toward the side surface of the housing, and the gas further flows on the side surface side of the housing. Out of the housing. As the gas recirculates in this manner, the inside of the housing is cooled. Therefore, no gas stays inside the housing, and heat does not stay inside the housing, so that heat generated inside the housing can be dissipated outside the housing.

In the projector described above, the first opening is formed on a side surface of the housing, and the second opening is formed on an upper surface of the housing.
In this way, the gas outside the housing flows from the side surface side of the housing, the gas flows from the side surface side of the housing toward the upper surface side of the housing, and the gas further flows on the upper surface side of the housing. Out of the housing. As the gas recirculates in this manner, the inside of the housing is cooled. Therefore, no gas stays inside the housing, and heat does not stay inside the housing, so that heat generated inside the housing can be dissipated outside the housing.

In the projector described above, a filter is formed in at least one of the first opening and the second opening.
By forming the filter in this way, dust that enters the inside of the housing from the outside of the housing via the first opening or the second opening can be removed. Therefore, a dustproof effect can be obtained and the inside of the housing can be maintained in a high clean state.

In the projector described above, a plurality of at least one of the first opening and the second opening are formed.
Thus, the flow rate of the gas flowing into the housing can be increased by providing the plurality of first openings. Moreover, the flow volume of the gas which flows out of a housing | casing can be increased by providing a some 2nd opening part. Therefore, inflow of gas into the housing can be promoted, and outflow of gas to the outside of the housing can be promoted. That is, the cooling efficiency inside the housing can be improved.

  Here, in the first opening and the second opening, not only the number of one opening is increased, but the number of both openings is increased to increase the number of the first opening and the second opening. It is preferable to balance the sum of the respective opening areas. This is because the recirculation of the gas inside the housing is performed by the balance between the inflow and outflow of the gas, so if the number of only one opening is increased to increase the sum of the opening areas, It is difficult to perform reflux efficiently. On the other hand, by increasing the number of both openings and balancing the sum of the respective opening areas, the flow rate increases together while maintaining the balance between the gas inflow and outflow. The cooling efficiency inside the housing can be improved.

In the projector described above, the first opening is formed in the vicinity of a heat source disposed inside the casing.
Here, the heat generation source means a device that generates heat by current supply like a light source device, or a device that generates heat by light energy accompanying irradiation of the light source device, such as an optical component.
Since the first opening is formed in the vicinity of the heat generation source in this way, the gas inside the casing flows out of the casing through the second opening and flows in the vicinity of the heat generation source. Thereby, not only can the light source device be cooled by the cooling fluid, but also the heat source can be efficiently cooled. Therefore, the cooling efficiency can be improved.

In the projector, the cooling channel includes a connection channel connected to the light source device and a heat dissipation channel for heat dissipation continuously connected to the connection channel. The second opening is formed according to the position.
Here, “the second opening is formed according to the position of the heat dissipation channel” means that at least a part of the heat dissipation channel and the second opening overlap in a plan view. Or, it means that the second opening is formed at a position following the direction in which the heat dissipation channel extends, and in both cases, the gas flowing out from the second opening is directly connected to the heat dissipation channel. It is arranged so as to come into contact.

  Since the second opening is formed according to the position of the heat dissipation channel in this way, the gas inside the casing flows out of the casing through the second opening, and near the heat dissipation channel. To flow. As a result, the heat radiation channel itself is cooled, and the cooling fluid flowing in the heat radiation channel is cooled. The light source device is cooled by circulating the cooling fluid in the cooling flow path. Therefore, not only can the heat generated inside the housing be dissipated, but the light source device can be cooled and the cooling efficiency can be improved.

In the projector described above, the heat dissipation channel is disposed outside the housing.
In this way, since the heat dissipation channel is disposed in a state exposed to the outside of the housing, the cooling fluid flowing through the heat dissipation channel can be cooled more effectively than when the heat dissipation channel is disposed inside the housing where heat is easily trapped. .

In the projector described above, the heat radiation channel is disposed inside the housing.
In this way, since the heat radiation channel is not exposed to the outside of the housing, it is possible to realize a compact projector shape including the heat radiation channel. Further, when the heat radiation channel is exposed to the outside of the housing, there is a restriction on the design of the projector. However, by arranging the heat radiation channel inside the housing, the degree of freedom in the external design of the projector can be increased.

Further, the projector includes a heat radiating housing unit in which at least a part of the heat radiating channel and at least a part of the housing are integrally formed, and the second opening is provided in the heat radiating housing unit. It is characterized by being formed.
Here, in the heat radiating housing part, the heat radiating housing part and the heat radiating channel can conduct heat.
According to the present invention, the gas inside the casing flows out of the casing through the second opening while flowing in the vicinity of the heat dissipation passage in the heat dissipation casing. Thereby, the cooling fluid flowing in the heat dissipation channel is cooled by cooling the heat dissipation channel itself. In addition, since the heat radiating housing part and the heat radiating channel can conduct heat, the heat radiating housing part is cooled to cool the heat radiating channel, and the cooling fluid flowing in the heat radiating channel is cooled. Is done.
The light source device is cooled by circulating the cooling fluid in the cooling flow path. Therefore, the heat radiation flow path can be cooled using the heat conduction in the heat radiation casing. Thereby, not only can the heat generated inside the housing be dissipated, but the light source device can be cooled, and the cooling efficiency can be improved.

In the projector described above, a rectifying plate is formed inside the casing.
In this way, in the gas flow path that flows into the housing from the first opening and flows out of the housing from the second opening, there is no stagnation in the gas flow inside the housing, The said gas can be made to flow with the shape of a baffle plate. Therefore, the heat generated inside the housing can be efficiently radiated to the outside of the housing.

In the projector described above, the rectifying plate is formed in the connection channel.
By forming the rectifying plate in the connection flow path in this manner, the connection flow path and the rectification plate can conduct heat, so that not only the gas flows along with the shape of the rectification plate, but also rectification. The connection channel can be cooled via the plate.
Therefore, the heat generated inside the housing can be efficiently radiated to the outside of the housing, and the light source device can be cooled, and the cooling efficiency can be improved.

In the projector described above, the rectifying plate is formed in the heat dissipation channel.
Since the heat radiating flow path is formed in the rectifying plate in this way, the heat radiating flow path and the rectifying plate can conduct heat, so not only the gas flows along with the shape of the rectifying plate. The heat radiation channel can be cooled via the plate.
Therefore, the heat generated inside the housing can be efficiently radiated to the outside of the housing, and the light source device can be cooled, and the cooling efficiency can be improved.

(First embodiment)
Hereinafter, a first embodiment of the present invention will be described with reference to the drawings.
First, a schematic configuration of the projector will be described with reference to FIG. FIG. 1 is a schematic configuration diagram of a projector embodying the present invention.

  The projector 1 includes three light source devices 10R, 10G, and 10B that emit red light (R), green light (G), and blue light (B), respectively, as the light source device 10. The light source devices 10R, 10G, and 10B that emit light of each color use light emitting elements as light emitting sources. In this embodiment, a light emitting diode (LED) is used as the light emitting element. The three light source devices 10R, 10G, and 10B constituting the light source device 10 in the first embodiment are configured as separate light source devices, and are connected to the cooling flow path 55 to form the integrated light source device 10.

  And the optical structure part 20 for modulating and combining each color light radiate | emitted from the light source device 10 is provided. A light valve 22 is used as the light modulation element, and a red light valve 22R, a green light valve 22G, and a blue light valve 22B are used. A dichroic prism 26 is used for composition. A projection unit 30 is provided for enlarging and projecting the modulated and synthesized light. The projection unit 30 includes a projection lens 32.

Further, the projector 1 includes a control unit CONT therein. The control unit CONT controls the light emission operation of the light source devices 10R, 10G, and 10B, the modulation operation of the light valves 22R, 22G, and 22B, and the operation of a pump 60 (described later) that causes the cooling fluid in the cooling passage 55 to flow. is there. The control unit CONT includes an external input terminal (not shown), and performs the above-described control based on a signal input from the external input terminal.
The control unit CONT is configured by an electronic circuit such as an LSI (Large Scale Integration Circuit) formed on a printed circuit board. Specifically, an arithmetic circuit such as a CPU (Central Processing Unit), a RAM (Random Access Memory), or the like. ) And the like, and a driver circuit.

Next, the operation of the projector will be described.
Each color light is emitted from the three light source devices 10R, 10G, and 10B constituting the light source device 10. Then, each emitted color light is incident on a light valve 22 constituting the optical configuration unit 20 provided at a position facing each color light.

  The light valve 22 has a function of controlling image data as an image source and a function of modulating each color light. For each color light incident on the light valve 22, red light (R) is modulated by a red light valve 22R, green light (G) is modulated by a green light valve 22G, and blue light (B) is for blue light. Is modulated by the light valve 22B. Each color light that is modulated and emitted from the light valve 22 enters a dichroic prism 26 that constitutes the optical component 20.

The dichroic prism 26 has a function of combining each color light. The color lights incident on the dichroic prism 26 are combined, and the combined light is emitted. The emitted combined light is incident on the projection unit 30.
The projection unit 30 includes a plurality of projection lenses 32 and has a function of expanding light for projection. The combined light incident on the projection unit 30 is enlarged and emitted. The enlarged combined light emitted from the projection lens 32 is projected as an image on a screen 40 provided outside the projector 1. In this way, the projector 1 projects an image.

Next, the configuration of the cooling channel 55 will be described. The cooling channel 55 cools the light source device 10 by circulating a cooling fluid.
The cooling channel 55 includes connection channels 11, 13, and 16A that connect the three light source devices 10R, 10G, and 10B in series, and a heat radiation channel 50 that radiates the heat of the cooling fluid flowing through the cooling channel 55. Become.
Specifically, the connection flow path 11 connects three light source devices 10R, 10G, and 10B in series. Moreover, the connection flow path 13 is connected to the light source device 10B located on the downstream side in the flow direction of the cooling fluid. Further, the connection flow path 16A is connected to the light source device 10R located on the upstream side in the flow direction of the cooling fluid. Further, the connection flow path 16A is connected to the discharge port of the pump 60 that circulates the cooling fluid.
Further, the connection flow path 13 is connected to one end of the heat dissipation flow path 50 via the flow path relay section 14, and the other end is connected to the suction port of the pump 60 via the flow path relay section 15 and the connection flow path 16B. ing.
The heat radiation channel 50 of this embodiment is provided by a path in which U-shaped bent portions are formed in layers. Here, the connection flow path 16B and the connection flow path 13 are connected to the both ends of the heat dissipation flow path 50 for heat dissipation via the flow path relay section 15 and the flow path relay section 14.

Next, the operation of the cooling fluid flowing through the flow path will be described.
The series of cooling flow paths 55 are filled with a cooling fluid. As the cooling fluid, liquids such as ethylene glycol, propylene glycol, pure water, silicon oil, and fluorine-based hydrocarbons, and gases such as nitrogen gas (N2) and argon gas (Ar) can be used. In order to circulate such a cooling fluid in the cooling flow path 55, a pump 60 is used.

  First, the cooling fluid flows in one direction by driving the pump 60. In the present embodiment, the cooling fluid is set to flow in the direction of flowing from the pump 60 through the connection flow path 16A and flowing into the red light source device 10R.

  When the pump 60 is driven, the cooling fluid flows through the connection channel 16A and flows into the light source device 10R for red, receives heat generated by the red light emitting diode (LED), which is a light emitting element, and flows out to the connection channel 11 side. To do. And the cooling fluid which flowed out distribute | circulates the connection flow path 11 of the downstream of the light source device 10R, and flows in into the light source device 10G for green. The inflowing cooling fluid receives heat generated by the green light emitting diode (LED) and flows out to the connection channel 11 side on the downstream side of the light source device 10G. The cooling fluid that has flowed out flows through the connection channel 11 and flows into the blue light source device 10B. The cooling fluid that flows in receives the heat generated by the blue light emitting diode (LED) and flows out to the connection flow path 13.

  And the cooling fluid which received the heat | fever in the light source device 10B distribute | circulates the connection flow path 13, and flows in into the thermal radiation flow path 50 for thermal radiation via the flow path relay part 14. FIG. The heat radiation flow path 50 for heat radiation has a path in which several bent portions are formed, and continues to the flow path relay section 15. As a material constituting the heat radiation flow path 50 for heat radiation, a pipe made of a copper metal having a high thermal conductivity is used.

  When the cooling fluid flows through the heat radiation channel 50 for heat radiation, the heat received by the light source device 10R for red, the light source device 10G for green, and the light source device 10B for blue of the light source device 10 Heat is efficiently transferred to the path 50. Then, the heat radiation channel 50 for heat radiation that has been transmitted heat efficiently radiates heat to the outside air by convection of the surrounding outside air. By radiating heat, the temperature of the heat radiating flow path 50 is lowered, so that the cooling fluid flowing through the heat radiating flow path 50 is also cooled.

  Here, the heat radiation flow path 50 for heat radiation is a path in which U-shaped bent portions are formed in multiple layers, by increasing the flow path length and increasing the surface area in contact with the outside air, This is because the cooling fluid is efficiently cooled by natural air cooling.

The cooling fluid cooled by flowing through the heat radiating flow path 50 flows into the flow path relay section 15, flows through the connection flow path 16 </ b> B connected to the flow path relay section 15, and flows into the pump 60. Then, the cooled cooling fluid flows through the connection channel 16A by the pump 60 and flows into the light source device 10R for red.
As the cooling fluid circulates in the cooling flow path 55 in this way, a series of heat circulation occurs, and the light source device 10 can be cooled by natural cooling using convection of the outside air.

  In the present embodiment, the cooling fluid is circulated in the order of the light source device 10R to the light source device 10G and the light source device 10G to the light source device 10B. However, the present invention is not limited to this, and the optical system arrangement relationship and the light source It is important to circulate such that the cooling efficiency is high due to the heat generation relationship of the devices 10R, 10G, and 10B. Further, due to the difference in the amount of heat generated by the light source devices 10R, 10G, and 10B, a flow path may be formed so as to cool the light source devices 10R, 10G, and 10B alone. It becomes possible to cool by using.

  In the present embodiment, the cooling fluid is circulated through the one series of cooling flow paths 55. However, the present invention is not limited to this, and when the pump 60 or the like has a circulation capability, a plurality of series of flow paths are used. It is also possible to improve the cooling efficiency by circulation.

  The three light source devices 10R, 10G, and 10B constituting the light source device 10 in the present embodiment are configured as separate light source devices, and are connected by a connection flow path 11 to form an integrated light source device 10. However, the light source device 10 may be configured as an integrated light source device 10 from the beginning, and the connection flow path 11 may be formed of a member constituting the light source device 10. With this configuration, the light source device 10 can be further reduced in size.

  In the first embodiment, a copper-based metal having a high thermal conductivity is adopted as the material of the cooling channel 55, but the present invention is not limited to this, and an aluminum alloy having a high thermal conductivity, etc. Other metals can also be used.

Next, the configuration of the projector 1 will be described with reference to FIG.
2A is a schematic plan view of the projector, FIG. 2B is a cross-sectional view taken along line AA ′ of FIG. 2A, and FIG. 2C is a partial cross-sectional view.
In FIG. 2B, the light source device 10 is arranged at the center of the projector 1. In FIG. 2B, the light source device 10 indicates one of the light source devices 10R, 10G, and 10B. is there. In addition, it is assumed that the light source device 10 is provided with a pump 60 and a control unit CONT adjacent to each other.

As shown in FIG. 2A, the casing 70 that forms the exterior of the projector 1 is roughly composed of two bodies, a first casing member 70A and a second casing member 70B.
Here, the first housing member 70 </ b> A constitutes the upper side including the upper surface of the projector 1 and the left and right side surfaces facing each other. The second casing member 70 </ b> B constitutes the lower side including the lower surface of the projector 1. Further, in the housing interior 70C surrounded by the first and second housing members 70A and 70B, gas can freely flow.

  In addition, a heat radiation channel 50 is provided on the upper surface of the first housing member 70A and the outer surfaces of the left and right side surfaces. Further, the heat radiation channel 50 is provided by a path in which U-shaped bent portions are formed in layers. The heat radiation channel 50 is also provided around the opening 75.

As shown in FIG. 2B, the second housing member 70B is provided with the light source device 10, the optical configuration unit 20, the projection unit 30, the pump 60, and the control unit CONT.
Here, the light source device 10, the optical configuration unit 20, the projection unit 30, the pump 60, and the control unit CONT correspond to a heat source in the present invention. Specifically, the light source device 10 generates heat by a current supplied to the light emitting element. Further, the optical configuration unit 20 and the projection unit 30 generate heat due to the irradiation light of the light source device 10. The pump 60 generates heat by driving means for circulating the cooling fluid. The control unit CONT generates heat from an electronic circuit such as a CPU and a driver accompanying the operation of the projector.

  Further, connection flow paths 11, 13, and 16 are connected to the light source device 10. The connection channel 13 is connected to a channel relay unit 14 for connecting to the heat dissipation channel 50. Similarly, a flow passage relay portion 15 for connecting to the heat radiation flow passage 50 is connected to the connection flow passage 16. The second casing member 70B is provided with a leg member 77 so that the projector 1 can be stably placed on the desk.

In the projector 1, a lower opening (first opening) 80 a formed on the lower surface side of the housing 70 and an upper opening (second opening) 80 b formed on the upper surface side of the housing 70. It is the composition provided with. Here, the lower opening 80a is provided on the upstream side in the gas flow direction due to the rising air flow generated in the housing interior 70C, and the upper opening 80b is provided on the downstream side in the gas flow direction. Is.
Specifically, the lower opening 80a is formed at two locations on the lower surface of the second housing member 70B, and the inside of the housing 70C and the outside of the second housing member 70B through the lower opening 80a. And gas can flow. Here, the lower opening 80a is provided in the vicinity of the light source device 10, the optical component 20, the projection unit 30, the pump 60, and the control unit CONT, and the gas flowing through the lower opening 80a is the light source device. 10 and the surface of the pump 60.

On the other hand, the upper opening 80b is formed in a substantially quadrangular shape on the upper surface of the first housing member 70A, and gas is generated in the housing inside 70C and the outside of the first housing member 70A through the upper opening 80b. Is flowable. Further, since the light source device 10 is positioned at the approximate center of the first casing member 70A, the upper opening 80b is also provided at the approximate center of the first casing member 70A. Here, the upper opening 80b is formed in a portion where a part of the heat radiation channel 50 and the U-shaped bent portion 50a of the heat radiation channel 50 are arranged (see FIG. 2A). As described above, the upper opening 80b is disposed corresponding to the heat radiating flow path 50, so that the gas flowing through the upper opening 80b comes into contact with the surface of the heat radiating flow path 50.
Further, a filter 82 is formed in each of the lower and upper openings 80a and 80b, and dust is prevented from being applied to the housing interior 70C. As the filter 82, for example, a porous member such as a sponge is employed.

FIG. 2C is a partially enlarged view of the heat radiation channel 50 provided on the outer surface of the first housing member 70A. The heat radiating channel 50 uses a pipe formed of a copper-based metal having a high thermal conductivity. The first casing member 70A is made of a magnesium alloy that has high thermal conductivity and is lightweight. Of course, the first housing member 70A is not limited to a magnesium alloy, and a metal such as an aluminum alloy having a high thermal conductivity can also be used. If there is a cooling capacity, a synthetic resin may be used. And the heat radiation flow path 50 is being fixed to the outer surface of 70 A of 1st housing | casing by performing the welding 57 partially.
The fixing means is not limited to the welding 57, and a double-sided tape, an adhesive, or the like can also be used. Further, the first casing member 70A has a mechanism for fixing the cooling heat radiation channel 50, for example, a slight flexibility so that the outer cross-sectional shape of the cooling heat radiation channel 50 can be fixed. Fixing can be simplified by performing a molding process including the shape portion.

Next, assembly of the projector 1 will be described.
The light source device 10, the optical component unit 20, the projection unit 30, the pump 60, and these connected to the first casing member 70 </ b> A to which the heat radiation channel 50 is fixed are connected to the connection channels 13 and 16 and the channel relay units 14 and 15. The second casing member 70B to which the power source for operation and the control unit CONT and the like are fixed is fixed by positioning. Fix with screws. Next, one end of the heat radiation channel 50 is connected to the channel relay unit 14, and the other end is connected to the channel relay unit 15.

  When the connection is completed, the filter 82 is set in the lower and upper openings 80a and 80b, and the filter 82 is fixed. Further, optical adjustment (for example, adjustment for aligning the optical axis) is performed by the light source device 10 set on the second housing member 70B side, the optical configuration unit 20, and the projection unit 30 before assembly. Go to. This completes the mechanical assembly and flow path assembly.

Next, the flow of the cooling fluid in the cooling channel 55 will be described.
The cooling fluid receives heat generated in each of the light source devices 10R, 10G, and 10B by a pump 60 (see FIG. 1) provided integrally with the light source device 10, and the connection flow path 13 is shown in FIG. 2 (b). It flows in the direction of the arrow and flows into the connected heat dissipation flow path 50 via the flow path relay portion 14. The cooling fluid flows in the direction of the arrow shown in FIG. 2 (a) through a path that is folded several times through the U-shaped bent portion while transferring the received heat to the heat dissipation flow path 50. . Since the heat radiation channel 50 is provided on the upper surface and the side surface of the first housing member 70A, it tends to cause convection of the outside air and efficiently radiates the heat transferred to the outside air by the convection of the outside air.
By radiating heat in this way, the temperature of the heat radiating channel 50 decreases, and the cooling fluid flowing through the lowered heat radiating channel 50 is cooled. Then, the cooled cooling fluid flows through the flow path relay unit 15, flows through the connection flow path 16 in the direction of the arrow shown in FIG. 2B, and returns to the pump 60 (see FIG. 1). The cooled cooling fluid again flows into the light source device 10 by the pump 60 (see FIG. 1).
As the cooling fluid circulates in the cooling flow path 55 configured in this way, a series of heat circulation occurs. Thereby, the installation volume is large, and the light source device 10 can be cooled without using a cooling fan as a noise source.

Next, the flow of gas between the outside of the housing 70 and the inside 70C of the housing will be described.
The projector 1 operates by being controlled by the control unit CONT. Here, since the control unit CONT includes various electronic circuits as described above and is disposed in the housing interior 70C, the controller CONT generates heat as the various electronic circuits operate, and the temperature inside the housing 70C is increased. To rise. As a result, an ascending airflow is generated in the housing interior 70C, and accordingly, the gas outside the second housing member 70B flows into the housing interior 70C via the lower opening 80a. And the said gas flows in the direction shown to the code | symbol B and code | symbol B 'toward the upper side opening part 80b from the lower side opening part 80a. Further, the gas flows out from the upper opening 80b to the outside of the first housing member 70A. As the gas recirculates in this way, the heat generated in the housing 70C is dissipated.

Here, since the lower opening 80a is formed in the vicinity of the light source device 10, the optical component 20, the projection unit 30, the pump 60, and the control unit CONT, these flow in via the lower opening 80a. The gas is cooled.
In addition, since the heat radiating flow path 50 is formed corresponding to the position of the upper opening 80b, the gas inside the housing 70C flows out of the housing 70 through the upper opening 80b, and the heat radiating flow. It flows in the vicinity of the path 50. Thereby, the heat radiation channel 50 itself is cooled, and the cooling fluid flowing in the heat radiation channel 50 is cooled. The light source device 10 is cooled as the cooling fluid circulates in the cooling flow path 55.

Next, the configuration and operation of the light source device 10 will be described in detail.
3 to 5 are diagrams showing the light source device 10.
FIG. 3 is a plan view of the light source device 10, and the lens cap 130 and the fixing ring 140 illustrated in FIG. 4 are omitted. FIG. 4 is a cross-sectional view of the light source device 10. FIG. 5 is a plan view showing details of the light emitting element base 120 of the light source device 10. 3 and 4, the light source device 10 includes a light emitting element base 120, an LED chip 100 as a light emitting element fixed to the light emitting element base 120, a fixing ring 140, and a lens cap 130. .

  The LED chip 100 has a substantially square planar shape, and is provided with a p-electrode 101 on the top surface and an n-electrode 102 on the bottom surface, and the bottom surface 122 of the recess formed on the light-emitting element base 120. The p-electrode 101 is connected to the lead substrate 160 with a wire 110 and is fixed to the central portion with a conductive material such as silver paste.

  The light emitting element base 120 has a rectangular parallelepiped shape, and has a concave portion with a wide opening and a narrow bottom at the center. The light emitting element base 120 has inflow passages 124 and 126 through which the cooling fluid 150 penetrating from the outer edge to the recess and outflow passages 125 and 127 are formed. The inflow passages 124 and 126 and the outflow passages 125 and 127 are partially provided at a cross-sectional height where the upper surface of the LED chip 100 described later is desired, and the planar position is formed in a direction along one side of the LED chip 100. Has been.

  In FIG. 3, the inflow paths 124 and 126 and the outflow paths 125 and 127 are formed in parallel, and the outflow paths 125 and 127 have a distance H in the direction perpendicular to the LED chip 100 from the longitudinal direction. The distance from the longitudinal direction 126 to the LED chip 100 is set at a position away from the perpendicular distance h. Intersections 125A and 127A of the outflow passages 125 and 127 and the inclined surface portion 121 of the recess are formed at an acute angle with respect to the other intersections 125B and 127B when the plane is viewed.

  In FIG. 5, a flow guide path 128 of a windmill-like cooling fluid 150 is formed on the bottom 122 of the light emitting element base 120 toward the LED chip 100. The flow channel 128 is formed in a groove shape or a protrusion shape in the bottom portion 122. The flow guide path 128 may be a windmill shape or a linear radial shape, and is formed in a range from the vicinity of the outer periphery of the bottom portion 122 to the vicinity of the periphery of the LED chip 100. It is preferable to provide a space that can flow so as to rotate along the LED chip 100.

For the light emitting element base 120, an aluminum alloy or a copper alloy having a high thermal conductivity can be used. Hereinafter, a case where an aluminum alloy having a small specific gravity and a light weight is used will be described as an example. The light emitting element base 120 has a mirror finish, a fine uneven finish (diffuse reflection finish), and a light reflection layer in order to efficiently reflect the visible light emitted from the LED chip 100 onto the surfaces of the slope portion 121 and the bottom portion 122. The plating to form is given. Although not shown, the light emitting element base 120 is connected to an external control circuit.
A fixing ring 140 in which a lead substrate 160 is inserted is closely fixed to the upper surface 123 of the light emitting element base 120.

The lead substrate 160 is a strip-shaped thin plate made of metal, and is disposed between the inflow path 126 and the outflow path 127. Both ends of the lead board 160 are extended from the fixing ring 140, and one end on the inner side is The other end of the LED chip 100 is connected to an external control circuit (not shown).
A lens cap 130 is tightly fixed to the upper surface 141 of the fixing ring 140, and a cooling fluid storage chamber (hereinafter referred to as a cooling fluid storage chamber) in which the cooling fluid 150 flows through the lens cap 130, the fixing ring 140, and the recess of the light emitting element base 120. 170, referred to as a storage chamber).
The LED chip 100 emits light according to a light emission signal from an external control circuit.

Next, the flow of the cooling fluid 150 will be described with reference to FIGS.
Here, the flow when the light source device 10G (see FIG. 1) is taken as an example will be briefly described. The inflow channels 124 and 126 are connected to the connection channel 11 (see FIG. 1), and the outflow channels 125 and 127 are connected to the connection channel 11 (see FIG. 1). Then, the cooling fluid 150 is cooled in the flow process of the heat radiating channel 50 (see FIG. 1), and flows again into the light source device 10G from the inflow channels 124 and 126.

  The cooling fluid 150 flowing in from the inflow paths 124 and 126 flows in the storage chamber 170 of the light emitting element base 120 in the direction of arrow A. Since the inflow path 126 and the outflow path 127 and the inflow path 124 and the outflow path 125 are displaced in the plane direction, they are diverted at the intersections 125A and 127A between the outflow paths 125 and 127 and the slope portion 121. The And a part is discharged | emitted from the outflow path 125,127 outside, a part flows to the arrow B direction, is discharged | emitted from the outflow path 125,127, and the above-mentioned circulation is performed.

As described with reference to FIG. 5, when the flow guide path 128 is formed, it flows as indicated by the arrows A and B described above (see FIG. 3) and flows toward the LED chip 100 in the direction of the arrow C. The flow as indicated by the arrow D around the LED chip 100 is performed.
Here, the LED chip 100 as a light source constituting the light source devices 10R, 10G, and 10B in the first embodiment may be constituted by one light emitting element (LED), or the light emitting elements (LED) are arranged in an array. It may be configured as follows. Thereby, brightness can be set freely and the light source devices 10R, 10G, and 10B can be downsized.

As described above, in the projector 1 according to the present embodiment, the gas flows from the lower opening 80a toward the upper opening 80b along with the rising air flow caused by the heat generation in the housing 70C, and the interior of the housing Since the gas recirculates at 70C, the heat inside the housing 70C can be dissipated. Therefore, as compared with the case where the lower opening 80a and the upper opening 80b are not formed in the housing 70, no gas stays in the housing 70C and heat is stored in the housing 70C. Therefore, the heat generated inside the housing 70 </ b> C can be radiated to the outside of the housing 70.
Furthermore, since the projector 1 according to the present embodiment has a configuration in which the pump 60 cools the light source device 10 by causing the cooling fluid to flow, both the housing interior 70 </ b> C and the light source device 10 can be cooled. As a result of these synergistic effects, the cooling efficiency of the projector 1 can be improved.

  In the projector 1 of the present embodiment, the lower opening 80a is formed on the lower surface side of the housing 70, that is, the second housing member 70B, and the upper opening 80b is formed on the upper surface side of the housing 70, that is, Since it is formed in the first housing member 70A, the gas flowing in from the lower surface side of the second housing member 70B is recirculated in the housing interior 70C, and the upper surface side of the first housing member 70A from the housing interior 70C. Can be drained towards As the gas recirculates in this way, the heat inside the housing 70C can be dissipated. Therefore, no gas stays in the housing interior 70 </ b> C and no heat is accumulated in the housing interior 70 </ b> C, so that heat generated in the housing interior 70 </ b> C can be dissipated to the outside of the housing 70.

  Further, in the projector 1 of the present embodiment, since the filter 82 is formed in the lower opening 80a and the upper opening 80b, the lower opening 80a and the upper opening 80b are provided from the outside of the housing 70. It is possible to remove dust that enters the interior 70C of the housing. Therefore, a dustproof effect can be obtained and the inside 70C of the housing can be maintained in a state of high cleanliness.

Further, in the projector 1 of the present embodiment, the lower opening 80a is formed in the vicinity of the light source device 10, the optical component 20, the projection unit 30, the pump 60, and the control unit CONT arranged in the housing interior 70C. Therefore, the heat generated from these members can be efficiently radiated by the flow of the gas flowing in from the lower opening 80a.
Moreover, since the plurality of lower openings 80a are formed, the flow rate of the gas flowing into the housing interior 70C can be increased.
In the present embodiment, the lower openings 80a are formed at two locations. However, the number of the lower openings 80a can be increased, or the number of the light source device 10, the optical configuration unit 20, the projection unit 30, the pump 60, and the control unit CONT can be increased. The lower opening 80a may be formed at an arbitrary position, such as by forming the lower opening 80a according to each position.

  Further, in the projector 1 according to the present embodiment, since the heat radiation channel 50 is formed at the position of the upper opening 80b, the gas inside the casing 70C flows out of the casing 70 through the upper opening 80b. At the same time, it flows in the vicinity of the heat radiation channel 50. Thereby, the heat radiation channel 50 itself is cooled, and the cooling fluid flowing in the heat radiation channel 50 is cooled. The light source device 10 is cooled as the cooling fluid circulates in the cooling flow path 55. Therefore, not only can the heat generated in the housing 70C be dissipated, but the light source device 10 can be cooled, and the cooling efficiency can be improved.

  Further, in the projector 1 of the present invention, since the heat radiation channel 50 is disposed outside the housing 70, the heat radiation channel 50 is exposed to the outside of the housing 70, and heat is easily accumulated inside the housing. The cooling fluid flowing through the heat radiation channel 50 can be cooled more effectively than the case where it is disposed at 70C.

(Second Embodiment)
Next, a second embodiment of the present invention will be described.
In this embodiment, a different part from 1st Embodiment described previously is demonstrated, and the same code | symbol is attached | subjected to the same structure and description is simplified.
6A and 6B are diagrams illustrating the configuration of the projector 1a according to the present embodiment. FIG. 6A is a schematic plan view of the projector, and FIG. 6B is a cross-sectional view taken along the line CC ′ in FIG. It is.

  The projector 1a shown in FIGS. 6A and 6B includes a plurality of upper openings (second openings) 80c different from the upper openings 80b according to the position of the heat radiation channel 50. More specifically, a plurality of upper openings 80c are formed along the direction in which the heat radiation channel 50 extends. In other words, when the projector 1a is viewed in plan, a plurality of upper openings 80c are formed on the upper surface of the first housing member 70A so as to overlap the heat radiating flow path 50. As described above, a plurality of the upper openings 80 c are arranged corresponding to the heat radiating flow paths 50, so that the gas flowing through the upper openings 80 c comes into contact with the surface of the heat radiating flow paths 50. Further, a filter 82 is formed in each of the upper openings 80c, and dustproofing is performed on the housing interior 70C.

  Further, in the lower opening 80a and the upper openings 80b and 80c, not only the number of one opening is increased, but the number of both openings is increased to reduce the lower opening 80a and the upper opening. It is preferable to balance the sum of the opening areas of the portions 80b and 80c. This is because the recirculation of the gas in the housing interior 70C is performed by the balance between the inflow amount and the outflow amount of the gas. Therefore, when the number of only one opening is increased and the sum of the opening areas is increased, the gas is recirculated. It is difficult to perform the reflux of the water efficiently. On the other hand, by increasing the number of both openings and balancing the sum of the respective opening areas, the flow rate can be increased together while maintaining the balance between the gas inflow and outflow. It becomes possible.

  In addition, although the planar shape of the upper side opening part 80c is circular, it may be another shape, without limiting this. For example, it may be an elongated hole-shaped slit that is long in the direction in which the heat radiation channel 50 extends, or may be elliptical.

Next, the flow of gas between the outside of the housing 70 and the inside 70C of the housing will be described.
Similarly to the first embodiment, the temperature inside the housing 70C rises due to the heat generated by the control unit CONT, and an ascending air current is generated. Accordingly, the gas outside the second housing member 70B flows into the housing interior 70C through the lower opening 80a. The gas flows from the lower opening 80a toward the upper opening 80b in the directions indicated by reference numerals B and B ′, and the gas D and the upper opening 80c from the lower opening 80a. It flows in the direction shown by the symbol D ′. Further, the gas flows out from the upper opening 80b to the outside of the first housing member 70A. As the gas recirculates in this way, the heat generated in the housing 70C is dissipated.

As described above, in the projector 1a according to the present embodiment, since the plurality of upper openings 80c are formed, the flow rate of the gas flowing out of the housing 70 can be increased. Therefore, inflow of gas into the housing can be promoted, and outflow of gas to the outside of the housing can be promoted. That is, the cooling efficiency inside the housing can be improved.
Further, since the upper opening 80c is formed following the direction in which the heat radiation channel 50 extends, the gas flowing out of the housing 70 directly from the inside 70C through the upper opening 80c is directly passed. Can be brought into contact with the heat dissipation channel 50.

(Third embodiment)
Next, a third embodiment of the present invention will be described.
In this embodiment, a different part from embodiment described above is demonstrated, and the same code | symbol is attached | subjected to the same structure and description is simplified.
FIG. 7 is a cross-sectional view showing a main part of the projector 1b according to the present embodiment.
In the present embodiment, the light source device 10, the optical configuration unit 20, the projection unit 30, the pump 60, and the control unit CONT formed on the second housing member 70B are formed in portions not shown. And

  As shown in FIG. 7, the projector 1b according to the present embodiment has a configuration in which a heat radiation channel 50 is provided between the first housing member 70A and the second housing member 70B. That is, the heat radiation channel 50 is arranged in the housing interior 7C. Further, the heat radiation channel 50 is arranged according to the position of the upper opening 80c formed in the first housing member 70A.

Next, the flow of gas between the outside of the housing 70 and the inside 70C of the housing will be described.
Similarly to the above-described embodiment, the temperature inside the housing 70C rises due to heat generated by the control unit CONT, and an ascending air current is generated. Accordingly, the gas outside the second housing member 70B flows into the housing interior 70C through the lower opening 80a. Then, the gas flows in the direction indicated by E from the lower opening 80a toward the upper opening 80b. Further, the gas flows out from the upper opening 80b to the outside of the first housing member 70A. As a result, the heat generated in the housing interior 70C is dissipated. Further, since the heat radiating flow path 50 is formed in the housing interior 70C as described above, the heat radiating flow path 50 is cooled by the reflux of gas in the housing internal 70C.

As described above, in the projector 1b of the present embodiment, the heat generated in the housing interior 70C can be radiated and formed corresponding to the position of the heat radiating flow path 50, as in the above-described embodiment. Since the upper opening 80c is provided, the heat radiation channel 50 can be directly cooled.
Further, in the projector 1b, since the heat radiation channel 50 is disposed inside the housing 70C, the heat radiation channel 50 is not exposed to the outside of the housing 70, so that the projector shape including the heat radiation channel 50 can be made compact. Can be realized. Further, when the heat radiation channel 50 is exposed to the outside of the housing 70, there is a restriction on the design of the projector. However, by disposing the heat radiation channel 50 inside the housing 70C, the degree of freedom in the external design of the projector is increased. be able to.

(Fourth embodiment)
Next, a fourth embodiment of the present invention will be described.
In this embodiment, a different part from embodiment described above is demonstrated, and the same code | symbol is attached | subjected to the same structure and description is simplified.
FIG. 8 is a diagram illustrating the configuration of the projector 1c according to the present embodiment. FIG. 8A is a schematic plan view of the projector, and FIG. 8B is a partial perspective view illustrating the main part of the projector.

The projector 1c shown in FIGS. 8A and 8B includes a heat radiating casing 85 in which at least a part of the heat radiating channel 50 and at least a part of the first casing member 70A are integrally formed. Yes. Further, the heat radiating casing 85 has an upper opening (second opening) 80d.
The heat radiating casing 85 is formed at a substantially central portion of the first casing member 70A, and has a configuration in which a U-shaped bent portion 50a in which the heat radiating flow path 50 is bent is embedded.

Further, as shown in FIG. 8 (b), the heat dissipating casing 85 includes a plurality of fins 85a provided in series. Each of the fins 85a is formed with a flow path holding part 85b, and the heat dissipation flow path 50 is held by the flow path holding part 85b. A gap formed between each of the plurality of fins 85a is an upper opening 80d. As a result, the upper opening 80d allows the heat generated in the housing interior 70C to flow out along with the gas along with the rising airflow. In addition, the heat-dissipating fluid 50 held in the flow path holding part 85b is brought into direct contact with the outflow of gas to cool it. Further, in the heat radiating casing 85, the fins 85a and the heat radiating channel 50 can conduct heat, so that the heat radiating channel 50 is cooled via the fins 85a.
Here, the thickness of the fins 85a is preferably about 0.2 mm, and the pitch is preferably about 0.5 mm. In this way, by providing a plurality of fins 85, the fins 85 themselves function as a filter. Further, a protective filter for preventing the fins 85 from being damaged may be formed on the surface of the heat dissipation casing 85.

Next, the flow of gas between the outside of the housing 70 and the inside 70C of the housing will be described.
Similarly to the above-described embodiment, the temperature inside the housing 70C rises due to heat generated by the control unit CONT, and an ascending air current is generated. Then, the gas in the housing interior 70C flows out of the first housing member 70A through the upper opening 80d while flowing in the vicinity of the heat radiation channel 50 in the heat radiation housing 85. Thus, the cooling fluid flowing in the heat dissipation channel 50 is cooled by cooling the heat dissipation channel 50 itself. In addition, since the heat radiating casing 85 and the heat radiating channel 50 can conduct heat, the heat radiating channel 85 is cooled by cooling the heat radiating casing 85 and flows in the heat radiating channel. The cooling fluid is cooled. Then, the optical device 10 is cooled as the cooling fluid circulates in the cooling flow path 55.

  As described above, in the projector 1c of the present embodiment, the heat conduction with the heat radiating flow path 50 in the heat radiating casing 85 can be used. Thereby, not only can the heat generated in the housing interior 70C be dissipated, but the light source device 10 can be cooled, and the cooling efficiency can be improved.

(Fifth embodiment)
Next, a fifth embodiment of the present invention will be described.
In this embodiment, a different part from embodiment described above is demonstrated, and the same code | symbol is attached | subjected to the same structure and description is simplified.
FIG. 9 is a cross-sectional view showing the configuration of the projector 1d according to the present embodiment.

As shown in FIG. 9, the projector 1 d has a configuration in which rectifying plates 87 and 88 are provided inside the housing 70 </ b> C. Further, the projector 1d includes a side opening (second opening) 80e on the side of the casing 70, that is, on the side of the first casing member 70A.
Here, the rectifying plate 87 is formed in the connection channels 11, 13, and 16 and is formed immediately above the lower opening 80 a. Further, the rectifying plate 88 is formed in the heat radiating flow path 50 and is formed at the corner of the first housing member 70A.

  Such rectifying plates 87 and 88 have a guiding shape for controlling the air flow. Therefore, it has a function of regulating the flow direction of the gas flowing into the housing interior 70C and rectifying it in a predetermined direction. Specifically, the rectifying plate 87 has an inclined surface that is inclined at a predetermined angle with respect to the extending direction of the connection channels 11, 13, and 16, and the gas flowing in from the lower opening 80 a is inclined. It is designed to flow according to the surface. The rectifying plate 88 has an inclined surface that is inclined at a predetermined angle with respect to the inner surface of the first housing member 70A, and the upper opening 80c is made to follow the gas flowing in the inside 70C of the housing according to the inclined surface. And has a function of flowing to the side opening 80e.

Further, each of the rectifying plates 87 and 88 also functions as fins provided in the connection flow paths 11, 13, and 16 and the heat dissipation flow path 50. Specifically, the rectifying plate 87 receives the heat of the cooling fluid flowing through the connection flow paths 11, 13, and 16 and cools the cooling fluid. Further, the rectifying plate 88 receives the heat of the cooling fluid flowing through the heat radiation channel 50 and cools the cooling fluid. Further, since the rectifying plate 88 is also in contact with the first housing member 70A, it receives the heat of the first housing member 70A and cools the first housing member 70A itself.
Here, it is preferable that the rectifying plates 87 and 88 have a large effective heat radiation area, and it is possible to improve the cooling efficiency by increasing the surface area of the rectifying plates 87 and 88 in a fine shape. Further, as the material of the rectifying plates 87 and 88, it is preferable to adopt a material having high thermal conductivity, as in the heat radiation channel 50.

  As described above, in the projector 1d of the present embodiment, the gas flowing in from the lower opening 80a is rectified in the directions indicated by the symbols F and F ′ in accordance with the rising airflow generated in the housing interior 70C. Can do. As a result, no stagnation occurs in the gas flow in the housing interior 70 </ b> C, and the gas can be caused to flow along with the shapes of the rectifying plates 87 and 88. Therefore, the heat generated in the housing interior 70 </ b> C can be efficiently radiated to the outside of the housing 70.

  Further, since the rectifying plate 87 is formed in the connection flow paths 11, 13, and 16, heat can be conducted between the connection flow paths 11, 13, and 16 and the rectification plate 87. Therefore, not only can the gas flow according to the shape of the rectifying plate 87, but also the cooling fluid flowing through the connection flow paths 11, 13, 16 can be cooled via the rectifying plate 87. That is, the cooling efficiency of the light source device 10 can be improved.

  Further, since the rectifying plate 88 is formed in the heat radiating flow path 50, heat can be conducted between the heat radiating flow path 50 and the rectifying plate 88. Therefore, not only can the gas flow according to the shape of the rectifying plate 88, but also the heat radiation channel 50 can be cooled via the rectifying plate 88. Therefore, the heat generated in the housing interior 70 </ b> C can be efficiently radiated to the outside of the housing 70, and the cooling fluid flowing through the heat radiation channel 50 can be cooled via the rectifying plate 88. That is, the cooling efficiency of the light source device 10 can be improved.

  Further, in the projector 1d of the present embodiment, since the side opening 80e is provided, the gas outside the second housing member 70B flows from the lower surface side of the second housing member 70B, and the gas is the second gas. It flows from the lower surface side of the housing member 70B toward the side surface side of the first housing member 70A. Further, the gas flows out from the side surface side of the first housing member 70A to the outside of the first housing member 70A through the side surface opening 80e. As the gas recirculates in this way, the heat inside the housing 70C is dissipated. Therefore, no gas stays in the housing interior 70 </ b> C and no heat is accumulated in the housing interior 70 </ b> C, so that heat generated in the housing interior 70 </ b> C can be dissipated to the outside of the housing 70.

(Modification of the fifth embodiment)
Next, a modification of the fifth embodiment of the present invention will be described.
In this modification, the structure of the projector 1d shown in the fifth embodiment is provided with a heat radiation channel 50 in which heat radiation fins 89 are formed.
FIG. 10 is a cross-sectional view showing a configuration of a projector 1e shown as a modification.

As shown in FIG. 10, the projector 1 e includes heat radiating fins 89 in the vicinity of the side opening 80 e. Further, a heat radiation channel 50 is formed inside the heat radiation fin 89.
As described above, the heat dissipating fin 89 having the heat dissipating flow path 50 formed in the housing 70 </ b> C is provided in a place where the gas flow rate is slow because it is relatively out of the internal gas flow path. Ascending airflow is generated by heat radiation from the inside, and the internal heat radiation channel 50 can be efficiently cooled. Furthermore, since heat is efficiently radiated to the first casing member 70A via the radiating fins 89 having a large contact area with respect to the first casing member 70A, the cooling that flows through the radiating flow path 50 more efficiently. The fluid can be cooled. That is, the cooling efficiency of the light source device 10 can be improved.

(Sixth embodiment)
Next, the installation state of the projector described in the first to fifth embodiments will be described. In this embodiment, a different part from embodiment described above is demonstrated, and the same code | symbol is attached | subjected to the same structure and description is simplified.
11A and 11B are diagrams for explaining the installation state of the projector. FIG. 11A is a schematic diagram showing a state where the projector is placed on the base, and FIG. It is the schematic which shows the state which attached the projector to.
In the present embodiment, the projector 1 will be described as a representative.

  As shown in FIG. 11A, in the projector 1 arranged on the base 100, an upward air flow is generated in the housing interior 70C when the projector 1 operates. As a result, gas flows into the housing interior 70 </ b> C from the gap between the base 100 and the projector 1 through the lower opening 80 a. Further, the gas rises above the projector 1 and flows out through the upper opening 80b. That is, the gas flows in the direction of the symbol G in the drawing.

  On the other hand, as shown in FIG. 11B, in the projector 1 attached to the ceiling 200, an upward air flow is generated in the housing interior 70C when the projector 1 operates. As a result, gas flows into the housing interior 70C from below the projector 1 through the lower opening 80a. Further, the gas rises toward the gap between the ceiling 200 and the projector 1 and flows out through the upper opening 80b. That is, the gas flows in the direction of the symbol H in the figure.

  As described above, the projector 1 according to the present embodiment is associated with the rising air current in the housing interior 70 </ b> C regardless of whether it is placed on the base 100 or attached to the ceiling 200. Gas can flow. Therefore, as described in the above embodiment, the heat generated inside the housing 70 </ b> C can be radiated to the outside of the housing 70.

  In the projector described in the above-described embodiment, the gas flowing into the housing interior 70C from the lower opening 80a is caused to flow out from the upper opening 80b or the side opening 80e. However, this is not a limitation. Absent. The gas may flow from the side opening (first opening) 80e toward the upper opening (second opening) 80b without forming the lower opening 80a. Even if such a configuration is adopted, gas does not stay in the housing interior 70C, and heat does not accumulate in the housing interior 70C, so that heat generated in the housing interior 70C is transferred to the housing 70C. It can dissipate heat to the outside.

  The projector described in the above embodiment employs a configuration in which the light source device 10 serving as a heat source, the optical configuration unit 20, the projection unit 30, the pump 60, and the control unit CONT are provided in the second casing member 70B. However, this is not a limitation. A configuration in which the heat generation source is provided in the first housing member 70A may be employed. Even if such a configuration is adopted, gas does not stay in the housing interior 70C, and heat does not accumulate in the housing interior 70C, so that heat generated in the housing interior 70C is transferred to the housing 70C. It can dissipate heat to the outside.

1 is a schematic configuration diagram of a projector according to a first embodiment of the invention. FIG. 1 is a plan view, a cross-sectional view, and a cross-sectional view of a projector according to a first embodiment of the invention. The top view which shows a light source device. Sectional drawing which shows a light source device. The principal part top view which shows a light source device. The top view and sectional drawing of the projector which concern on 2nd Embodiment of this invention. Sectional drawing of the principal part of the projector which concerns on 3rd Embodiment of this invention. The top view and partial perspective view of the projector which concern on 4th Embodiment of this invention. Sectional drawing of the projector which concerns on 5th Embodiment of this invention. Sectional drawing of the projector which concerns on the modification of 5th Embodiment of this invention. FIG. 10 is an installation diagram of a projector according to a sixth embodiment of the invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1, 1a, 1b, 1c, 1d, 1e ... Projector 10, 10R, 10G, 10B ... Light source device 11, 13, 16, 16A, 16B ... Connection flow path (cooling flow path), 20 ... Optical structure part, DESCRIPTION OF SYMBOLS 30 ... Projection part, 50 ... Radiation flow path (cooling flow path), 55 ... Cooling flow path, 60 ... Pump, 70 ... Housing | casing, 70A ... 1st housing member (housing | casing), 70B ... 2nd housing member (Case), 70C ... Inside of the case (Case), 80a ... Lower opening (first opening), 80b, 80c, 80d ... Upper opening (second opening), 80e ... Side opening ( (Second opening), 82 ... filter, 85 ... heat radiating casing, 87, 88 ... rectifying plate

Claims (14)

A light source device that emits light;
An optical component constituting an optical system for modulating or synthesizing the emitted light of the light source device;
A projection unit for projecting light emitted from the optical component;
A cooling flow path for circulating a cooling fluid for cooling the light source device;
A housing constituting the exterior;
Comprising
The projector includes a first opening formed on the upstream side in the gas flow direction in the housing and a second opening formed on the downstream side.   The projector according to claim 1, wherein the first opening is formed on a lower surface side of the housing, and the second opening is formed on an upper surface side of the housing.   The projector according to claim 1, wherein the first opening is formed on a lower surface side of the housing, and the second opening is formed on a side surface of the housing.   The projector according to claim 1, wherein the first opening is formed on a side surface side of the casing, and the second opening is formed on an upper surface side of the casing.   The projector according to any one of claims 1 to 4, wherein a filter is formed in at least one of the first opening and the second opening.   The projector according to any one of claims 1 to 5, wherein a plurality of at least one of the first opening and the second opening is formed.   The projector according to any one of claims 1 to 6, wherein the first opening is formed in the vicinity of a heat source disposed in the housing.   The cooling flow path includes a connection flow path connected to the light source device and a heat dissipation flow path for heat dissipation continuously connected to the connection flow path, and the second flow path corresponds to the position of the heat dissipation flow path. The projector according to claim 1, wherein an opening is formed.   The projector according to any one of claims 1 to 8, wherein the heat radiation channel is disposed outside the housing.   The projector according to any one of claims 1 to 8, wherein the heat radiation channel is disposed inside the housing. A heat dissipating case part integrally formed with at least a part of the heat dissipating flow path and at least a part of the case;
The projector according to claim 1, wherein the second opening is formed in the heat radiating housing.   The projector according to any one of claims 1 to 11, wherein a rectifying plate is formed inside the casing.   The projector according to claim 1, wherein the rectifying plate is formed in the connection flow path. The projector according to claim 1, wherein the rectifying plate is formed in the heat dissipation channel.

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