JP4053016B2 - Lamp unit - Google Patents

Description

  The present invention relates to a lamp unit, and more particularly to a lamp unit used in a video display device such as a projector device.

  The projector device guides light obtained from a light source to an optical system to generate image light, and enlarges and projects the image light on a screen. The lamp unit 50 shown in FIG. 8 is used as the light source.

  The lamp unit 50 includes a housing 51 in which the light source unit 52 is accommodated, and an exhaust fan 56 disposed at the rear portion of the light source unit 52.

  The housing 51 is provided with a plurality of air intake ports 54 for taking in air for cooling the lamp. An air discharge port 57 is opened behind the housing 51, and an exhaust fan 56 is attached to the air discharge port 57.

  The light source unit 52 is configured by disposing the light emitting unit 53 at the focal position of the reflector 55 and disposing the translucent plate 58 in the opening 55a of the reflector 55, and radiates high-luminance white light forward.

  When a high-intensity lamp such as an ultra-high pressure mercury lamp is used for the light emitting unit 53 of the light source unit 52, the light emitting unit 53 becomes very hot. For this reason, the reflector 55 is provided with an exhaust hole 60 in the neck portion 55b, and a blower hole 61 is provided below the opening 55a on the front surface of the reflector 55. The light source unit 52 is cooled by the exhaust fan 56 and the cooling air is sent from the blower hole 61 to the exhaust hole 60 to cool the inside of the light source unit 52. And at this time, the ventilation hole 61 is opened toward the light emission part 53, and the light emission part 53 is cooled (for example, refer patent document 1).

In addition, since the temperature of the upper part of the light emitting part 53 is about 900 ° C., a technique for intensively cooling the upper part of the light emitting part 53 by devising a cooling air flow path to cool the upper part of the light emitting part 53 is also known. (For example, refer to Patent Document 2).
Japanese Patent No. 3462863 Japanese Patent Laid-Open No. 11-353933

  In any of the above techniques, the cooling air is blown into the interior of the reflector 55 from the intake hole 61 below the opening 55a to cool the light emitting unit 53, or the upper part of the light emitting unit 53 that is extremely hot is cooled by the cooling air. In this technique, the upper part of the light emitting unit 53 is cooled intensively.

  However, the air intake hole is located farthest from the light emitting portion 53 in the reflector 55. Moreover, the upper portion of the light emitting portion 53 is always higher in temperature than the lower portion, and the entire light emitting portion 53 needs to be maintained at about 750 ° C. to 900 ° C. in order to obtain a predetermined light emission efficiency. That is, even if the cooling air flow path is devised, it is difficult to control the air flow from a distance, and it is insufficient in terms of direct cooling of the light emitting part.

  For example, if the temperature difference between the upper and lower portions of the light emitting unit is increased, the lamp may be damaged due to uneven temperature, and if the cooling air is not used efficiently, the addition of a fan for blowing increases, leading to noise.

  The present invention has been made in view of the above problems. First, a concave reflecting mirror having an opening and a neck, a sealing portion penetrating near the center of the neck, and light emission connected to the sealing portion. A light source unit having a light source comprising a light source unit, a light-transmitting plate covering the opening, an upper air intake hole and a lower air intake hole provided in the neck part, and a neck part of the light source unit. This problem can be solved by providing a ventilation duct and an intake fan that blows air from behind the light source unit through the ventilation duct.

  In addition, the amount of air blown from the air duct to the upper air intake hole is larger than that of the lower air intake hole.

  Moreover, the air intake fan is solved by being housed in a fan case provided with an air blowing port above the light emitting portion.

  Further, the blower duct is connected to the light source unit with its open end biased upward with respect to the central portion of the light source unit.

  Further, an exhaust hole is provided in a peripheral edge portion of the opening on the upper intake hole side.

  Further, an exhaust hole is provided in a peripheral portion of the opening on the upper and lower intake hole sides.

  Further, the blower duct and the intake fan are rotatable with respect to the concave reflecting mirror.

  In addition, an exhaust hole is provided in each of the upper peripheral edge and the lower peripheral edge of the opening, and the exhaust hole is provided with a lid that can be opened and closed by gravity.

  According to the present invention, first, cooling air is blown directly from the upper and lower intake holes provided in the neck of the reflector to the upper and lower portions of the light emitting unit. As a result, the cooling air passing through the upper air intake hole and the lower air intake hole is almost directly blown to the light emitting part, so that the cooling efficiency of the light emitting part can be increased. Further, since the cooling air cools the light emitting part almost directly, it becomes easy to adjust the temperature of the light emitting part to obtain the optimum light emission efficiency.

  2ndly, the upper part of a light emission part can be cooled intensively by making the ventilation volume from the ventilation duct to an upper intake hole larger than a lower intake hole. At the same time, since the lower part of the light emitting part can be appropriately cooled, the temperature difference between the upper and lower parts of the light emitting part can be reduced and the entire light emitting part can be cooled.

  Third, by providing the air intake fan's air outlet above the light emitting portion, the air flow can be biased and the air flow to the upper air intake hole can be increased, so that the upper portion of the light emitting portion can be intensively cooled. it can.

  Fourthly, by connecting the opening end of the air duct to the center portion of the light source unit so as to be biased upward, the flow passage width of the air intake duct on the upper intake hole side is made larger than the flow passage width on the lower intake hole side. Can be bigger. Thereby, the upper part of a light emission part can be cooled intensively.

  Fifth, by providing the exhaust hole in the peripheral edge of the opening on the upper intake hole side, the upper part of the light emitting part can be cooled more efficiently.

  Sixth, by providing exhaust holes in the upper peripheral edge and the lower peripheral edge of the upper and lower openings, the entire light emitting part can be efficiently cooled.

  Seventh, since the air duct can be rotated 180 degrees with respect to the concave reflecting mirror, the upper part of the light emitting part that is always at a high temperature can be efficiently cooled even when the lamp unit is used upside down. . For example, when the lamp unit is applied to a projector device or the like, the cooling air on the upper side of the light emitting unit can always be increased regardless of the ceiling-mounted type or the desk-mounted type, and the upper part of the light emitting unit can be intensively cooled. .

  Eighth, the exhaust hole is provided with a lid that can be opened and closed by gravity, and by providing a stopper that always opens upward, the upper exhaust hole can always be opened even when the lamp unit is turned upside down. The upper part (the upper light emitting part) of the light emitting part can be intensively cooled.

  A lamp unit according to an embodiment of the present invention will be described with reference to FIGS. 1 to 4 show a first embodiment of the present invention.

  FIG. 1 is a view showing a lamp unit of the present embodiment. 1A is a perspective view of an appearance, FIG. 1B is a perspective view without a housing, and FIG. 1C is a cross-sectional view taken along line AA ′ of FIG. 1B. .

  The lamp unit 20 includes a housing 11, a light source unit 10, a blower duct 12, and a blower fan 14.

  In the housing 11, for example, a plurality of air discharge ports 21 are opened above the light source unit 10, and an air intake port 22 is opened behind the light source unit 10. The light source unit 10 and the air duct 12 are accommodated in the housing 11, and an intake fan case 19 is disposed outside the housing 11.

  The light source unit 10 includes a concave reflecting mirror 1, a light emitting unit 2, a sealing unit 3, a translucent plate 4, an upper intake hole 5, a lower intake hole 6, and an exhaust hole 8.

  A concave reflecting mirror (hereinafter referred to as a reflector) 1 has an opening 1a on the front side (left side in FIG. 1C) from which light is emitted, and has a neck-like part 1b on the rear side facing the opening 1a. The neck 1b has a small diameter with respect to the opening 1a, for example, a cylindrical shape.

  The light source is, for example, an ultra-high pressure mercury lamp, and has a pair of electrodes in the light emitting unit 2, and sealing portions 3 are formed at both ends of the light emitting unit 2. A metal foil is embedded in the sealing portion 3, and an electrode is connected to one end of the metal foil and an external lead is connected to the other end. And the sealing part 3 by the side of the neck-shaped part 1b penetrates the center vicinity of the neck-shaped part 1b, and is fixed with the cap 7 provided in the sealing part 3 front-end | tip. Thereby, the sealing part 3 is supported substantially horizontally by the neck part 1b of the reflector 1, and the optical axis of the reflector 1 and the light emission part 2 corresponds.

  The neck portion 1b is provided with an upper intake hole 5 and a lower intake hole 6. These are branched intake passages of the neck-like portion 1b into intake passages above the sealing portion 3 and intake passages below the sealing portion 3, and in fact, the intake air continuous in an annular shape In this embodiment, the intake flow path above the center of the sealing portion 3 is the upper intake hole 5 and the lower is the lower intake hole 6.

  Although details will be described later, the upper intake hole 5 of the present embodiment is an intake hole that is always upward when viewed from the user even when the lamp unit 20 is used upside down. Let's say that the intake hole always goes down.

  A cooling air vent 9 is provided between the cap 7 and the neck 1b. The ventilation holes 9 communicate with the upper intake hole 5 and the lower intake hole 6, respectively, and are connected to the inside of the reflector 1.

  The translucent plate 4 is provided so as to cover the opening 1 b of the reflector 1. And the elongate exhaust hole 8 which spreads in the width direction of the translucent plate 4 is opened in the peripheral part of the opening part 1b of the reflector 1 by the side of the upper intake hole 5. As shown in FIG.

  The air duct 12 is provided so as to cover the neck portion 1 b of the light source unit 10.

  The intake fan case 19 accommodates the intake fan 14. The intake fan case 19 includes an air outlet 16 that opens toward the inside of the air duct 12, and a suction port 15 that takes in air from the side surface of the air intake fan case 19. The air outlet 16 of the fan case 19 is opened above the center of the circular intake fan 14 in the figure so as to be above the light emitting unit 2, and the cooling air from the intake fan 14 is The air is blown more by the upper intake hole 5.

  Further, the air duct 12 is connected to the light source unit 10 with its opening end biased upward with respect to the center of the light source unit 10. This also makes it possible to increase the amount of air blown from the air duct 12 to the upper air intake hole 5 than the lower air intake hole 6.

  2 is a cross-sectional view taken along line B-B ′ of FIG. 1A, and is a schematic view of the attachment position of the air duct 12 as viewed from the direction of the intake fan 14 (the X direction of FIG. 1C).

  For example, FIG. 2A shows a case where the opening end of the air duct 12 on the light source unit 10 side is circular. In this way, the center C2 of the opening end of the air duct 12 is shifted upward with respect to the center C1 of the neck 1b and connected to the light source unit 10.

  Further, when the opening end of the air duct 12 is rectangular as shown in FIG. 2B, the diagonal line center C2 is shifted with respect to the center C1 of the neck portion 1b so as to be connected to the light source unit 10. . By doing in this way, the air flow rate to the upper intake hole 5 of the light source unit 10 can be made larger than the air flow rate to the lower intake port 6.

  Next, the intake flow will be described with reference to FIG.

  When the intake fan 14 rotates, for example, counterclockwise in FIG. 3, outside air is sucked from the suction port 15 and blown into the blower duct 12 from the blower port 16, and the air passes through the blower duct 12 and passes through the light source unit 10. To the air vent 9. Then, the cooling air passes through the upper intake hole 5 and the lower intake hole 6 of the light source unit 10 and is directly blown against the light emitting unit 2.

  Then, the cooling air exchanges heat with the light emitting unit 2 at a high heat transfer rate, forcibly air-cools the light emitting unit 2, and is then introduced into the reflector 1. Then, after the reflector 1 is also cooled, it is discharged from the exhaust hole 8 to the outside.

  At this time, as described above, since the flow rate of the cooling air passing through the upper intake hole 5 is larger than that of the lower intake hole 6, the upper part of the light emitting unit 2 is intensively cooled. Further, the lower part of the light emitting unit 2 is also appropriately cooled, and cooling is possible so that the temperature distribution of the light emitting unit 2 becomes uniform.

  The air introduced into the reflector 1 is led out of the reflector 1 through the exhaust hole 8. The exhaust hole 8 also penetrates the housing 11 and is connected to the outside.

  As described above, the temperature of the light emitting unit 2 is higher than the lower side, and the temperature unevenness causes deterioration of the light emitting unit. Moreover, also from the point of cooling efficiency, it is necessary to hold | maintain the whole light emission part at about 750 to 900 degreeC, and control of the cooling air from a distant place is difficult.

  However, in the present embodiment, the cooling air is directly blown into the light emitting unit 2, and the cooling air is further divided into the upper intake hole 5 and the lower intake hole 6 to be sent from the air duct to the upper intake hole 5. By increasing the air volume, the upper part of the light emitting unit 2 can be more reliably cooled from below. At the same time, the lower part of the light emitting unit 2 is also appropriately cooled, so that temperature unevenness can be suppressed and the temperature distribution of the entire light emitting unit can be made uniform. Furthermore, it can be considered that the cooling air passing through the upper air intake hole 5 and the lower air intake hole 6 substantially contributes directly to the cooling of the light emitting unit 2, so that it is easy to control the temperature of the light emitting unit 2 by controlling the air volume.

  In addition, since the upper part of the light emitting unit 2 that is the highest temperature of the light source unit 10 is efficiently cooled, the air volume of the intake fan 14 can be set small, thereby greatly reducing noise generated from the intake fan 14. Can be reduced.

  When the exhaust hole 8 is provided at one place, the upper part of the light emitting part 2 can be cooled more efficiently if it is provided at the peripheral part of the opening 1a on the upper intake hole 5 side. Moreover, when providing two places, if it provides in an upper side peripheral part and a lower side peripheral part, the whole light emission part 2 can be cooled more efficiently. Further, at this time, the opening areas of the upper and lower exhaust holes 8 may be made different so that the cooling balance between the upper and lower portions of the light emitting unit 2 becomes the best.

  Furthermore, with reference to FIG. 4, an example at the time of employ | adopting the lamp unit 20 of this embodiment for the projector apparatus 30 is shown.

  FIG. 1 is a perspective view showing the entire projector apparatus 30. 4A is an external view, and FIG. 4B is a perspective view showing an internal structure.

  As shown in the figure, the projector device 30 includes a flat casing 31 composed of an upper half case 31a and a lower half case 31b. A projection window 32 is opened on the front surface of the casing 31, and a temperature discharged from the built-in lamp unit 20 is shown. A wind side outlet 33 is provided.

  In addition to the lamp unit 20, an optical unit 34 for generating a color image is provided inside the casing 31. The optical unit 34 includes a cooling unit (not shown) for cooling.

  Further, an upper surface discharge port 35 is provided on the upper surface of the casing 31, and this is directly connected to the exhaust hole 8 of the light source unit 10.

  The intake fan 14 of the lamp unit 20 is disposed in the vicinity of the side surface outlet 33 of the casing 31. Or you may connect the intake fan case 19 and the side surface outlet 33 of the vicinity with a duct.

  Further, the upper surface discharge port 35 is not provided, and the exhaust hole 8 of the light source unit 10 may be connected to the side surface discharge port 33 by a duct.

  With such an arrangement, the intake fan 14 sucks outside air, and the light emitting unit 12 of the light source unit 10 can be directly cooled via the air duct 12. At this time, since the upper intake hole 5 has a larger air volume than the lower intake hole 6, the upper part of the light emitting unit 2 can be cooled intensively. And the warm air after cooling can be discharged | emitted outside via the exhaust hole 8 and the upper surface discharge port 35 (or via the duct and the side surface discharge port 33).

  Next, a second embodiment of the present invention will be described with reference to FIGS.

  The projector device 30 as shown in FIG. 4 includes, for example, a ceiling type that hangs from the ceiling and a desktop installation type that is installed on a desk. According to the second embodiment, the upper side of the light emitting unit 2 can be intensively cooled regardless of the usage form.

  That is, as shown in FIG. 5, the air duct 12 and the light source unit 10 are not integrally connected, and the air duct 12 can be rotated with respect to the light source unit 10. The rotation angle is 180 degrees or 360 degrees.

  Thereby, when the top and bottom of the lamp unit 20 is reversed, the blower duct 12 is turned upside down together with the intake fan 14. That is, when installed on a desk (FIG. 5A) and when suspended from the ceiling (FIG. 5B), the ceiling of the light source unit 10 is reversed, but the air duct 12 and the intake fan 14 (fan case 19) are always up and down ( A large amount of cooling air can be blown into the intake holes (upper intake holes 5) that are upward for the user without changing the top and bottom.

  That is, with this structure, the upper portion of the light emitting unit 2 that is at a high temperature is actively cooled regardless of the state of the projector device 30.

  In FIG. 5, the case where one exhaust hole 8 is provided so that the top and bottom of the light source lamp 10 and the air duct 12 is clear has been described as an example. However, as described above, the exhaust hole 8 is on the upper intake hole 5 side. Alternatively, since the cooling efficiency is good when provided on both upper and lower sides, the exhaust holes 8 are preferably provided on the upper and lower sides in the second embodiment in which the air duct 12 is rotatable.

  In addition, as shown in FIG. 6, when the air duct 12 is rotatable, exhaust holes 8 may be provided in the upper peripheral edge and the lower peripheral edge, respectively, and the exhaust holes 8 may be provided with lids 40 that can be opened and closed by gravity. . The lid 40 can be opened and closed by a fulcrum 41, for example, and a stopper 42 is provided inside the exhaust hole 8 as shown in FIG. Thereby, the lid 40 on the lower side is closed by the stopper 42, and the lid 40 on the upper side is opened by gravity. In other words, the exhaust hole 8 which is the upper part of the device is always opened, and the cooling efficiency of the upper part of the light emitting unit 2 can be improved.

  Further, as shown in FIG. 6B, a stopper 42 may be provided at a position where the lower exhaust hole 8 is not completely closed. When the upper and lower exhaust holes 8 are provided, the upper and lower cooling balances of the light emitting section 2 also change due to the difference in the size of these exhaust holes 8, so that the lower exhaust holes 8 are large so that the cooling balance is the best. In such a case, the opening / closing state of the lid 40, that is, the position of the stopper 42 is set to an optimal position so that the exhaust can be performed, thereby enabling effective cooling.

  Furthermore, an example of fixation of the light source unit 10 and the air duct 12 when it can rotate is shown with reference to FIG.

  As shown in FIG. 7A, the light source unit 10 is fixed in the housing 11 at, for example, four fixing positions F on the outer end of the reflector 1. For example, in the case of the layout as shown in FIG. 4B, the air duct 12 is provided with a fixed shaft 45 in the intake fan case 19 as shown in FIG. 7B, and is fixed inside the casing 31. The air duct 12 and the intake fan case 19 are supported so as to be rotatable about the fixed shaft 45.

  Further, as shown in FIG. 7C, the rail 46 and the disk 47 may be used for fixing. The rail 46 is fixed to the inner surface of the housing 11, and the air duct 12 is disposed on the inner periphery of a disk 47 fitted in the rail 46. Thereby, the air duct 12 and the intake fan case 19 are rotatably supported by the disk 47.

Furthermore, although illustration is abbreviate | omitted, a rail may be made in the outer surface of the reflector 1, and the edge part of the ventilation duct 12 may be made circularly and it may engage | insert.

It is (A) perspective view, (B) perspective view, and (C) sectional view showing a lamp unit according to the present invention. It is sectional drawing explaining an upper Example. It is sectional drawing explaining an upper Example. It is a perspective view which shows the example of arrangement | positioning of the lamp unit which concerns on this invention. It is sectional drawing which shows 2nd Example of the lamp unit which concerns on this invention. It is sectional drawing which shows 2nd Example of the lamp unit which concerns on this invention. It is (A) perspective view, (B) side view, and (C) side view showing a lamp unit according to the present invention. It is sectional drawing which shows the conventional lamp unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Reflector 1a Opening part 1b Neck-shaped part 2 Light emission part 3 Sealing part 4 Translucent plate 5 Upper inlet hole 6 Lower inlet hole 7 Cap 8 Exhaust hole 9 Vent hole 10 Light source unit 11 Housing 12 Air duct
DESCRIPTION OF SYMBOLS 14 Air intake fan 15 Air inlet 16 Air outlet 19 Air intake fan case 20 Lamp unit 21 Air exhaust port 22 Air intake port 30 Projector apparatus 31 Casing 32 Projection window 33 Side surface discharge port 34 Optical unit 35 Upper surface discharge port 40 Lid 41 Support point 42 Stopper 45 Fixed shaft 46 Rail 47 Disc

Claims (7)

A light source comprising a concave reflecting mirror having an opening and a neck, a sealing part penetrating near the center of the neck and a light emitting part connected to the sealing part, and a translucent covering the opening A light source unit having a plate, and an upper intake hole and a lower intake hole provided in the neck-shaped part,
An air duct provided to cover the neck of the light source unit;
An air intake fan that blows air from behind the light source unit through the air duct ;
The lamp unit , wherein the blower duct and the intake fan are rotatable with respect to the concave reflecting mirror .   The lamp unit according to claim 1, wherein an amount of air blown from the air duct to the upper air intake hole is larger than that of the lower air intake hole.   The lamp unit according to claim 1, wherein the intake fan is housed in a fan case provided with an air blowing port above the light emitting unit.   The lamp unit according to claim 1, wherein the air duct is connected to the light source unit with an opening end biased upward with respect to a center portion of the light source unit.   The lamp unit according to claim 1, wherein an exhaust hole is provided in a peripheral portion of the opening on the upper intake hole side.   The lamp unit according to claim 1, wherein an exhaust hole is provided in a peripheral edge portion of the opening on the upper and lower intake hole sides.   2. The lamp unit according to claim 1, wherein an exhaust hole is provided in each of an upper peripheral edge and a lower peripheral edge of the opening, and a lid that can be opened and closed by gravity is provided in the exhaust hole.

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