JP2006080044A - Lamp device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a lamp device which can make it hard to leak outside the explosive sound of a discharge lamp and can improve cooling effect of a concave reflecting mirror. <P>SOLUTION: The lamp device comprises a discharge lamp 1, the concave reflecting mirror 2 inside of which the discharge lamp 1 is arranged, an inner housing 3 of enclosed structure which covers and holds the concave reflecting mirror 2, an outer housing 4 of non-enclosed structure which covers the inner housing 3 and has an outside air inlet port 42 arranged on the opening side of the concave reflecting mirror 2 and an exhaust port 43 arranged on the bottom side of the concave reflecting mirror 2, a first fan 5 which is arranged in the inner housing 3 and generates air stream in the inner housing 3, and a second fan 6 which is arranged at the exhaust port 43 and exhausts the outside air taken into the outer housing 4 from the outside air inlet port 42 from the exhaust port 43. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a lamp device having a discharge lamp.

  A lamp device used as a light source for a projector (image projection device), a lighting fixture or the like includes a discharge lamp, a concave reflecting mirror on which the discharge lamp is arranged, and a transparent surface facing the peripheral portion of the concave reflecting mirror. A housing having an optical part and covering the concave reflecting mirror (for example, Patent Documents 1 and 2).

  When a lamp device having a high-pressure discharge lamp capable of obtaining high brightness is used as a light source for a projector capable of obtaining a large screen image, the internal pressure of the high-pressure discharge lamp during lighting increases, and the discharge lamp may burst. When the discharge lamp ruptures, the bursting sound leaks to the outside. Therefore, in Patent Document 1, the housing has a hermetically sealed structure, an air circulation fan is disposed on the center side of the concave reflecting mirror in the housing, and the housing A cooling mechanism and / or a heat radiating mechanism is provided outside the side portion so as to suppress the temperature rise in the housing and, consequently, the temperature rise of the discharge lamp.

In Patent Document 2, the housing has a sealed structure, and a heat sink is provided at the base of the discharge lamp, or a convection device for cooling is provided outside the rear side of the housing. It is comprised so that the temperature rise of may be suppressed.
Japanese Utility Model Publication No. 2-113731 JP 2002-75014 A

  However, in the configuration in which the air circulation fan is arranged in one housing having a sealed structure as in Patent Document 1, the cooling mechanism and / or the heat radiating mechanism attached to the outer side of one side of the housing is used. Since one side is cooled and only the air in the housing is circulated by the air circulation fan, there is a problem that it is difficult to enhance the cooling effect in the entire housing. Further, when a through hole is provided in the housing to enhance the cooling effect, there is a problem that a burst sound generated when the discharge lamp bursts leaks from the through hole to the outside.

  Moreover, even in a configuration in which a heat sink is arranged in one sealed housing as in Patent Document 2 or a cooling convection device is attached to the rear part of the housing, there is a problem similar to that in Patent Document 1. .

  The present invention has been made in view of such circumstances, and a main object thereof is to hold a concave reflecting mirror, and include an inner housing body that covers the concave reflecting mirror, and an outer housing body that covers the inner housing body. By providing an air flow generating means for generating an air flow in the inner housing body and the outer housing body, it is possible to prevent the burst sound of the discharge lamp from leaking to the outside, and to enhance the cooling effect of the concave reflecting mirror. The object is to provide a lamp device.

  Another object is to provide a second structure in which the inner housing body is hermetically sealed, a first fan is disposed in the inner housing body, a through hole is provided in the outer housing body, and air in the outer housing body is exhausted from the through hole. An object of the present invention is to provide a lamp device that can speed up the air flow in the inner housing by providing a fan and can exhaust the air in the outer housing from a through hole.

  Another object is to circulate the air in the concave reflecting mirror and the inner housing while flowing by the air flow by providing the concave reflecting mirror with a plurality of communication holes that allow the inside of the concave reflecting mirror to communicate with the inner housing body. Accordingly, it is an object of the present invention to provide a lamp device that can enhance the cooling effect of the discharge lamp.

  Another object of the present invention is to provide a structure in which the through hole has an outside air intake port disposed on the peripheral side of the concave reflecting mirror and an exhaust port disposed on the center side of the concave reflecting mirror, so It is an object of the present invention to provide a lamp device that can be quickly replaced with outside air.

  Another object is to dissipate heat from the guide fins by providing a plurality of guide fins for guiding the air flow generated by the air flow generating means in the inner housing body and / or the outer housing body. An object of the present invention is to provide a lamp device that can cause the air heated by the airflow to flow along guide fins by the airflow generated by the airflow generating means.

  Another object of the present invention is to provide a lamp device that can reduce the stagnation of air in the inner housing body and / or the outer housing body by providing a rectifying plate that rectifies the air flow generated by the air flow generating means. There is.

  The lamp device according to the present invention includes a discharge lamp, a concave reflecting mirror in which the discharge lamp is disposed, and a housing that covers the concave reflecting mirror, wherein the housing is the concave reflecting mirror. An inner housing body that holds the inner housing body and an outer housing body that covers the inner housing body, and an air flow generating means for generating an air flow in the inner housing body and the outer housing body. To do.

  In this invention, since the concave reflecting mirror is covered in two stages by the inner housing body and the outer housing body, the burst sound of the discharge lamp generated in the inner housing body can be blocked by the inner housing body, Since the sound leaking from the inner housing body can be blocked by the outer housing body, the burst sound of the discharge lamp can be hardly leaked to the outside. In addition, since an internal air flow is generated in each of the inner housing body and the outer housing body, an increase in the temperature of the concave reflecting mirror can be suppressed by the air flow in the inner housing body. A temperature rise can be suppressed and the cooling effect of the concave reflecting mirror can be enhanced.

  In the lamp device according to the present invention, the inner housing body has a sealed structure, the outer housing body has a through hole, and the air flow generating means is disposed in the inner housing body. 1 fan and the 2nd fan which exhausts the air in the said outer housing body from the said through-hole.

  According to the present invention, the fan disposed in the inner housing body can increase the air flow in the inner housing body, can enhance the cooling effect in the inner housing body, and further, the air in the outer housing body. Since the fan that generates the flow can introduce external air into the outer housing body through the through hole and exhaust the air inside the outer housing body from the through hole, the temperature rise of the inner housing body can be further suppressed. Further, since the inner housing body has a hermetically sealed structure, it is possible to further prevent the burst sound of the discharge lamp from leaking to the outside.

  Further, in the lamp device according to the present invention, the concave reflecting mirror has a plurality of communication holes that allow the inside of the concave reflecting mirror to communicate with the inside of the inner housing.

  In this invention, the air flow generated by the first fan is introduced from one of the communicating holes into the concave reflecting mirror, and the air inside the concave reflecting mirror is introduced into the other one of the communicating holes. Can be discharged into the inner housing body, and the air inside the concave reflecting mirror and the air inside the inner housing body can be circulated while flowing by the air flow. The cooling effect of the lamp can be enhanced.

  Further, in the lamp device according to the present invention, the through-hole has an outside air intake port disposed on a peripheral side of the concave reflecting mirror and an exhaust port disposed on a central portion side of the concave reflecting mirror. And

  In the present invention, the outside air intake port and the exhaust port are arranged separately from the peripheral side and the center side of the concave reflecting mirror, and the air in the outer housing body can be quickly replaced with the outside air. The temperature rise of the inner housing body can be further suppressed.

  The lamp device according to the present invention is characterized in that the inner housing body and / or the outer housing body have a plurality of guide fins for guiding an air flow generated by the air flow generating means.

  In this invention, the heat of the inner housing body heated by the temperature in the inner housing body and / or the heat of the outer housing body heated by the temperature in the outer housing body can be dissipated from the guide fins, Since the air heated by this heat radiation can be made to flow along the guide fins by the air flow generated by the air flow generating means, the temperature rise in the inner housing body and / or the outer housing body can be further suppressed.

  In the lamp device according to the present invention, the inner housing body and / or the outer housing body may include a rectifying plate that rectifies the air flow generated by the air flow generating means.

  In this invention, the air flow generating means can rectify and flow the air flow generated in the inner housing body and / or the outer housing body by the rectifying plate, so that the inner housing body and / or the outer housing body It is possible to reduce the stagnation of the air, and it is possible to further suppress the temperature rise in the inner housing body and / or the outer housing body.

  According to the present invention, the burst sound of the discharge lamp generated in the inner housing body can be blocked by the inner housing body, and the sound leaking from the inner housing body can be blocked by the outer housing body. Can hardly leak to the outside. Moreover, the temperature rise of the concave reflecting mirror can be suppressed by the air flow in the inner housing body, and further, the temperature increase of the inner housing body can be suppressed by the air flow in the outer housing body, and the cooling effect of the concave reflecting mirror can be enhanced.

  In addition, according to the present invention, the cooling effect in the inner housing can be enhanced, and further, external air can be introduced into the outer housing through the through hole, and the air in the outer housing can be exhausted from the through hole. In addition, the temperature rise of the inner housing body can be further suppressed, and the burst sound of the discharge lamp can be further prevented from leaking to the outside.

  Further, according to the invention, since the air in the concave reflecting mirror and the inner housing body can be circulated while flowing by the air flow, the temperature rise in the concave reflecting mirror can be suppressed and the cooling effect of the discharge lamp can be enhanced. Can do.

  Moreover, according to this invention, the air in an outer housing body can be rapidly replaced with external air, and the temperature rise of an inner housing body can be suppressed further.

  Further, according to the present invention, the temperature of the inner housing body and / or the temperature of the outer housing body can be radiated from the guide fins, and the air heated by the radiated heat is generated by the air flow generating means. It can be made to flow along the guide fins by the air flow, and the temperature rise in the inner housing body and / or the outer housing body can be further suppressed.

  Moreover, according to this invention, it can reduce that the air in an inner housing body and / or an outer housing body stagnates, and can suppress further the temperature rise in an inner housing body and / or an outer housing body.

Hereinafter, the present invention will be described in detail with reference to the drawings showing embodiments thereof.
Embodiment 1
FIG. 1 is a schematic longitudinal sectional side view showing a layout configuration of Embodiment 1 of a lamp device according to the present invention.
This lamp device is opposed to a discharge lamp 1 having a light emitting part 1 a that emits light by discharge, a conical horn-shaped concave reflecting mirror 2 on which the discharge lamp 1 is arranged, and a peripheral part of the concave reflecting mirror 2. An inner housing body 3 that covers the concave reflecting mirror 2, an outer housing body 4 that covers the inner housing body 3, and an inner housing body 3 that has a sealed structure in which the front wall 3 a is provided with a translucent portion 31. And a first fan 5 that generates an air flow in the inner housing body 3 and a second fan 6 that generates an air flow in the outer housing body 4. The first fan 5 and the second fan 6 are interlocked and connected to an output shaft of an electric motor (not shown), and the first fan 5 and the second fan 6 constitute air flow generating means.

  The discharge lamp 1 has a substantially cylindrical shape, and is disposed opposite to a discharge space in which a light emitting material mainly composed of mercury is sealed in a light emitting portion 1a provided in the center. A pair of electrodes that are connected to a power source by lead wires connected to the electrodes. Further, the base of the discharge lamp 1 is fitted and fixed in a fitting hole 2 a formed on the opposite side of the periphery of the concave reflecting mirror 2.

  The concave reflecting mirror 2 has a peripheral edge attached to the front wall 3a of the inner housing body 3 at a position where the peripheral edge faces the translucent portion 31, and the concave reflecting mirror 2 is provided at a plurality of circumferential positions near the peripheral edge. A communication hole 21 is provided for communicating the inside of the inner housing body 3 with the inner housing body 3.

  The inner housing body 3 is connected to a front wall 3a provided with a light transmitting part 31 made of a light transmitting material at the center thereof, a peripheral wall 3b connected to the outer peripheral part of the front wall 3a, and a rear end part of the peripheral wall 3b. It has a rear wall 3c, and is formed in such a size that an appropriate space can be formed between it and the outer surface of the concave reflecting mirror 2. Further, a plurality of first fins 32 are integrally projected inside the peripheral wall 3b and the rear wall 3c, and a plurality of second fins 33 are integrally projected outside the peripheral wall 3b and outside the rear wall 3c. In addition, a first fan 5 whose rotational axis is in the front-rear direction is disposed in a space between the upper part of the concave reflecting mirror 2 and the upper part of the peripheral wall 3b.

  The outer housing body 4 is connected to a front wall 4a provided with a window hole 41 corresponding to the translucent portion 31 at the center thereof, and an outer peripheral portion of the front wall 4a, and a plurality of outside air inlets 42 are provided at the front end thereof. It has a peripheral wall 4b that is provided and a rear wall 4c that is connected to the rear end of the peripheral wall 4b and is provided with an exhaust port 43 at the center thereof. It is formed in a size that allows space. The exhaust fan 43 is provided with a second fan 6 whose rotational axis is the front-rear direction. The outside air inlet 42 and the exhaust port 43 constitute a through hole for making the outer housing body 4 non-sealed.

  The lamp device configured as described above is used as a light source for a projector, a lighting fixture or the like, and is incorporated in a device such as a projector. In use, the first fan 5 and the second fan 6 are driven. By driving the first fan 5, an air flow is generated in the inner housing body 3, and the concave reflecting mirror communicates with the air in the inner housing body 3 by the air flow through the communication hole 21 in the inner housing body 3. The air inside 2 circulates while flowing. By this air circulation, the discharge lamp 1 inside the concave reflecting mirror 2 and the concave reflecting mirror 2 can be cooled.

  Further, since the first fin 32 is provided inside the inner housing body 3, the heat of the inner housing body 3 can be radiated by the first fin 32, and the inner housing body heat-exchanged by this heat radiation. Since the air in 3 can be circulated by the first fan 5, the temperature rise of the inner housing body 3 can be further suppressed.

  Further, the second fan 6 is driven to generate an air flow in the outer housing body 4, and the air flow causes the outside air to be taken into the outer housing body 4 from the outside air inlet 42, and the air in the outer housing body 4 is changed. The air is exhausted from the exhaust port 43 to the outside. The inner housing body 3 in the outer housing body 4 can be cooled by this air exhaust. Since the inner housing body 3 can be cooled in this way, the temperature rise of the inner housing body 3 can be suppressed, the temperature rise of the concave reflecting mirror 2 in the inner housing body 3 can be suppressed, and the temperature rise of the discharge lamp 1 can be further suppressed. Can be suppressed.

  Further, since the second fin 33 is provided outside the inner housing body 3, the heat of the inner housing body 3 can be radiated by the second fin 33, and the outer housing body heat-exchanged by this heat radiation. Since the air in 4 can be exhausted by the second fan 6, the temperature rise of the inner housing body 3 can be further suppressed.

Embodiment 2
2 is a schematic longitudinal side view showing the layout configuration of the second embodiment, and FIG. 3 is a schematic rear view showing the configuration of the guide fins. The lamp device according to the second embodiment includes a plurality of first guides that guide the air flow generated by the first fan 5 in the flow direction of the air flow inside the peripheral wall 3b and the rear wall 3c of the inner housing body 3. Guide fins 34 are provided integrally, and a plurality of second fins for guiding the air flow generated by the second fan 6 to the outside of the peripheral wall 3b and the outside of the rear wall of the inner housing body 3 in the flow direction of the air flow. Guide fins 35 are integrally provided.

  In the second embodiment, the heat of the inner housing body 3 can be radiated by the first and second guide fins 34 and 35, and further, the heat in the inner housing body 3 that is heat-exchanged by this heat radiation Air can flow along the first guide fins 34, and the heat of the outer housing body 4 can be dissipated by the second guide fins 35. Since the air in the housing body 4 can flow along the second guide fins 35, the temperature rise in the inner housing body 3 and the outer housing body 4 can be further suppressed.

Embodiment 3
FIG. 4 is a schematic longitudinal sectional side view showing the layout configuration of the third embodiment. In the lamp device according to the third embodiment, a first rectifying plate 7 that rectifies an air flow generated by the first fan 5 is provided in the inner housing body 3, and a second fan 6 is generated in the outer housing body 4. The second rectifying plate 8 for rectifying the air flow to be supplied is provided.

  In the third embodiment, the air flow generated by the first fan 5 can be rectified and circulated, and the air flow generated by the second fan 6 can be circulated through the first and second rectifying plates 7, 7. 8, the air in the inner housing body 3 and the outer housing body 4 can be reduced and the temperature rise in the inner housing body 3 and the outer housing body 4 can be further suppressed. it can.

  In the embodiment described above, the rectifying plates 7 and 8 are provided in the inner housing body 3 and in the outer housing body 4, but in addition, the inner housing body 3 and the outer housing body 4 themselves are the rectifying plate 7. , 8 may also be configured. Further, in the embodiment described above, the outer housing body 4 is provided with a through hole made up of the outside air inlet 42 and the exhaust port 43. However, for example, the outside air inlet 42 is eliminated, and the exhaust port 43 of the rear wall 4c is removed. One through hole may be formed, outside air may be taken in from a part of the through hole, and air in the outer housing body 4 may be exhausted from the other part of the through hole.

It is a typical longitudinal section side view showing the layout composition of Embodiment 1 of the lamp device concerning the present invention. It is a typical vertical side view which shows the layout structure of Embodiment 2 of the lamp device which concerns on this invention. It is a typical rear view which shows the structure of the guide fin of the lamp device which concerns on this invention. It is a typical longitudinal cross-sectional side view which shows the layout structure of Embodiment 3 of the lamp device which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge lamp 2 Concave reflecting mirror 21 Communication hole 3 Inner housing body (housing)
34 guide fins 35 guide fins 4 outer housing body (housing)
42 Outside air intake (through hole)
43 Exhaust port (through hole)
5 First fan (air flow generating means)
6 Second fan (air flow generating means)
7 Current plate 8 Current plate

Claims (6)

  A lamp apparatus comprising: a discharge lamp; a concave reflecting mirror on which the discharge lamp is disposed; and a housing that covers the concave reflecting mirror; and the housing includes an inner housing body that holds the concave reflecting mirror; A lamp device comprising: an outer housing body that covers the inner housing body; and an air flow generating means for generating an air flow in the inner housing body and the outer housing body.   The inner housing body has a sealed structure, the outer housing body has a through hole, and the air flow generating means includes a first fan disposed in the inner housing body, and air in the outer housing body. The lamp device according to claim 1, further comprising a second fan that exhausts air from the through hole.   The lamp device according to claim 1, wherein the concave reflecting mirror has a plurality of communication holes that allow the inside of the concave reflecting mirror to communicate with the inside of the inner housing.   4. The lamp device according to claim 2, wherein the through hole has an outside air intake port disposed on a peripheral side of the concave reflecting mirror and an exhaust port disposed on a center side of the concave reflecting mirror.   The lamp device according to any one of claims 1 to 4, wherein the inner housing body and / or the outer housing body includes a plurality of guide fins for guiding an air flow generated by the air flow generating means.   The lamp device according to any one of claims 1 to 5, wherein the inner housing body and / or the outer housing body includes a rectifying plate that rectifies an air flow generated by the air flow generating means.

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