JP3806959B2 - Lighting device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a cooling structure for a lighting device, and more particularly, heat stored in each part of the housing and the components constituting the lighting device by a natural cooling method, not a forced cooling method using means such as a fan, a heat pipe, and a heat sink. In order to cool the energy, the external cool air efficiently flows into the housing, the overheated internal hot air is quickly raised, and the overheated internal hot air is quickly discharged, so that each component constituting the lighting device, particularly The present invention relates to a combined cooling structure for a lighting device that can efficiently cool a lamp sealing portion.
[0002]
[Prior art]
Conventionally, many lighting technology cooling techniques have been developed and improved by lighting engineers. The improvement of the lighting device was in the battle of how to reduce the heat energy radiated from the lamp. A method of improving the structure of the lamp itself in order to reduce the thermal energy itself of the light emitted from the light source, a method of forced air cooling by forcing external cold air into the housing, and the interior of the housing itself constituting the lighting device Alternatively, a method for improving an external structure, a method for removing heat rays irradiated from a lighting device through a filter, and the like have been researched and developed.
[0003]
In Japanese Utility Model Publication No. 63-40820 as these prior arts, in order to provide a small illumination device that does not affect the lamp life, a ventilation gap formed corresponding to the moving range of the lamp socket and the ventilation gap 1 are shielded from light. A plurality of hot air outflow holes are disposed on the upper part of the light shielding plate and the casing. However, one light shielding plate has a function of blocking light from being diffused to the outside, and does not perform a function of positively flowing external cold air into the housing. The plurality of hot air outflow holes are only provided with a plurality of openings through which hot air flows out. Therefore, Japanese Utility Model Publication No. 63-40820 is a case where the external cold air is allowed to actively flow into the casing, each component, in particular, the lamp sealing portion constituting the lighting device, and the hot air inside the casing is positively increased, It does not propose a technical idea that the hot air inside the housing is actively discharged from the ceiling.
[0004]
U.S. Pat. No. 2,368,781 discloses a studio spot lamp in which lighting devices can be stacked in two stages. In this illuminating device, in order to keep the lamp cooled, a plurality of “<”-shaped baffles are arranged in the longitudinal direction at the lower part of the lamp socket, and the outside air inflow function is achieved simultaneously with the light shielding function. In addition, a pair of double baffle plates are arranged around the lamp inside the housing, and a chimney function for raising the internal hot air is achieved. In addition, one horizontal baffle plate is disposed on the left and right sides of the central axis on the ceiling of the housing, and functions to discharge hot air. However, U.S. Pat. No. 2,368,781 discloses that a pair of double baffle plates are arranged around the lamp to perform a chimney function that raises the internal hot air, but the lamp seal is actively cooled. The heat energy stored in the lamp sealing portion is not positively increased in the ceiling direction, but the hot air inside the housing is merely increased in the ceiling direction. Furthermore, hot air is discharged from the upper part of the ceiling by a single horizontal baffle plate arranged on the ceiling in a pair of left and right. Certainly, the function of the double baffle plate is suggestive, but it still does not feel positive as a natural cooling technology.
[0005]
[Problems to be solved by the invention]
The present invention intensively and actively dissipates the hot air inside the casing, which rises in temperature due to heat radiation from the lamp, and the heat energy that is remarkably stored in each part of the lighting device, particularly the lamp sealing part. It is an object of the present invention to provide a cooling structure for a lighting device that can be used. Furthermore, the present invention not only enhances the functions so that each component of the conventional natural cooling technology can be analyzed more scientifically and can be cooled more efficiently, but also a novel novel technology that has never been known before. This is to propose a combined cooling technology.
[0006]
[Means for Solving the Problems]
The present invention has been made in view of the above points, and has a plurality of bottom ventilation holes for cooling the lamp socket and a plurality of bottom ventilation plates so that external cold air can flow in an accelerated manner through the bottom ventilation holes. Combined with large and small wedge-shaped metal fittings, a pair of skirt-shaped ventilation holes are arranged so that external cold air can be in direct contact with the lamp sealing part, and the internal hot air after contact with the lamp sealing part is quickly raised. In order to dispose a pair of internal ventilation plates, and to discharge the overheated internal hot air, a plurality of ventilation plates are arranged substantially horizontally on the ceiling of the housing, and the thermal energy accumulated in the lens flows in and rises. In order to discharge, the front frame is doubled and a gap is formed in the double front frame, so that external cold air is passed through the inner surface of the lens, so that the heat energy stored in the housing, lamp seal or lens is stored. It is an attempt to efficiently cool the Energy.
[0007]
That is, the illumination device of the present invention is
A housing,
A light source disposed on the central axis of the housing;
A lens that transmits light emitted from the light source;
A pair of guides disposed below the light source in parallel with a central axis in which the centers of the light source and the lens are in a straight line;
A lamp socket slidably mounted on a pair of guides;
A plurality of bottom vents formed in the bottom of the housing located below the pair of guides;
A plurality of bottom ventilation plates that are arranged between the pair of guides and the bottom of the casing and allow outside air to flow into the casing through the bottom ventilation holes;
An inlet opening provided below the lamp socket and through which outside air flows, and narrower than the inlet opening so that the air flowing into the housing from the inlet opening contacts the periphery of the lamp socket and A vent outlet formed so as to be positioned above the inlet opening and positioned above the bottom vent hole and the bottom vent plate, and both outer side surfaces of the pair of guides A pair of skirt-like vents arranged in,
A plurality of horizontal ventilation plates symmetrical on the center axis of the ceiling of the housing;
Air that is disposed on both sides of the central axis and outside the light source and above the vent of the skirt-shaped vent, and flows from both the bottom vent and the skirt-shaped vent. A pair of internal ventilation plates to circulate to the horizontal ventilation plate;
It is characterized by comprising.
[0008]
Further, in the illumination device of the present invention , a gap is formed between the lens bracket and the front frame by the lens bracket that fixes the outer peripheral surface of the lens and the front frame on which the lens bracket is provided. The air from the outside passes through the gap .
[0009]
Furthermore, the lighting device of the present invention, prior Symbol pair of internal airway plate, lateral width perpendicular to the central axis, widening the bottom of the housing, characterized in that it is formed so as to narrow the top .
[0010]
【Example】
The present invention will be described with reference to the drawings.
FIG. 1 is a front sectional view of an embodiment of a combined cooling structure for a lighting device according to the present invention.
In FIG. 1, a lamp 1 is arranged on the central axis. When the lamp is turned on, the portion where the thermal energy is most remarkably stored is the lamp sealing portion 2, and as this thermal energy is stored in the lamp sealing portion, the lamp is deteriorated and the life of the lamp is shortened. Therefore, a plurality of bottom vent holes 5 are arranged to cool the periphery of the lamp sealing portion 2 and the lamp socket 3. Further, the structure of the bottom ventilation plate is combined with a plurality of large and small wedge-shaped metal fittings 6 so that external cold air can flow in an accelerated manner through the bottom ventilation hole 5. The external cold air a rises through a gap between the wedge-shaped bottom ventilation plate 6 and the wedge-shaped bottom ventilation plate 6 ′ through the bottom ventilation hole 5 to cool the periphery of the lamp socket 3.
[0011]
Further, a pair of skirt-like vent holes 8 and 8 'are arranged so that the external cold air can directly contact the lamp sealing portion 2. The pair of skirt-like vent holes 8 and 8 'are provided with a large skirt-like vent opening 7 and a vent direction adjusting plate 9, and the external cold air b flowing in from the skirt-like vent opening 7 is in the vent direction. Along the adjustment plate 9, the air passes through the ventilation outlet 7 ′ narrower than the inlet opening 7 of the skirt-like ventilation hole and directly contacts the periphery of the lamp sealing portion 2 and the lamp socket 3. Cool and rise. The reason why the size of the vent outlet 7 ′ is made smaller than the size of the inlet opening 7 of the skirt-like vent hole is that a large amount of external cold air b easily flows from the large inlet opening 7 of the skirt-like vent hole, and the narrow vent outlet 7. It is an application of hydrodynamics so that it can pass through the 'opening' rapidly.
[0012]
Further, as a synergistic effect that could not be predicted at the design stage, the external cold air b flowing in from the inlet opening 7 of the skirt-shaped vent comes into contact with the lamp sealing portion 2 and the lamp socket 3 and at the same time the bottom vent. A further synergistic effect has been found in which the external cold air a flowing in through 5 is attracted and the external cold air a flowing in from the bottom vent hole 5 is accelerated. This synergistic effect is estimated from the smoke operation experiment introduced from the bottom vent hole 5 and further from the smoke operation experiment introduced from the skirt vent inlet opening 7. At the same time as the external cold air b flowing in from the lamp contacts the lamp seal 2 and the lamp socket 3, the air around the lamp seal 2 and the lamp socket 3 is overheated and rises. In addition, since the internal ventilation plate 10 described later quickly raises the heated internal hot air c around the lamp sealing portion 2 and the lamp socket 3 as a chimney effect, the air density around the lamp sealing portion 2 and the lamp socket 3 is increased. It is considered that the air becomes thin and sparse, and a force that balances the air density acts on this sparse region where the air density is thin, and external cold air is attracted from the bottom vent hole 5 and the opening 7 of the skirt-like vent hole.
[0013]
Further, a pair of internal ventilation plates 10 are disposed on both sides of the central axis and in the longitudinal direction between the inside of the housing and the lamp 1 in order to quickly raise the internal hot air c after contacting the lamp sealing portion. . The pair of internal ventilation plates 10 serve as a chimney effect. That is, the width of the transverse direction perpendicular to the central axis of the pair of internal ventilation plates is made wider at the lower part of the housing and further narrowed at the upper part, so that the external cold air is externally transferred from the bottom ventilation holes or the skirt-like ventilation holes. Cold air can be sucked into the housing at an accelerated rate, and the internal hot air can be quickly raised and discharged from the horizontal vents on the ceiling. For example, by forming the shape of the internal vent hole in a flared shape and narrowing the upper part into a substantially triangular shape, the flow of air is accelerated by applying fluid mechanics to widen the opening and narrow the outlet. It is based on. With this structure, the external cold air a flowing in from the bottom vent hole 5 and the external cold air b flowing in from the inlet opening 7 of the skirt-shaped vent hole 8 come into contact with the lamp sealing portion 2 and the lamp socket 3 periphery. It has the function of quickly raising the overheated internal hot air c.
Further, in order to discharge the overheated internal hot air d, a plurality of ventilation plates 11, 11 ′ are arranged substantially horizontally on the ceiling of the housing. The ceiling ventilation plate is described in detail in FIG.
[0014]
The heat flow state of the embodiment of the present invention in FIG. 1 is very good because the amount of external cold air sucked from the skirt-like vent is great for the lamp, the internal air circulation is good for the reflector, and there is no accumulation of air. As for the upper part of the internal ventilation plate, the flow of air on the inner surface is good due to the suction of the external cold air from the skirt-like ventilation holes and the discharge action of the horizontal ventilation plate on the ceiling, and there is no accumulation of air.
[0015]
FIG. 2 is a side sectional view showing the front frame structure of the lighting device according to the present invention.
In order to allow the heat energy accumulated in the lens 12 to flow in, rise and discharge, the front frame 15 is doubled and the gap 13 (not shown) is formed in the double front frame, so that the external cold air e is removed from the lens inner surface. The heat energy stored in the lens is efficiently taken away by passing through the lens, and is released from the gap 13 'between the double front frames of the ceiling to be naturally cooled.
[0016]
FIG. 3 is an enlarged view of the gap 13 of the double front frame.
A lens bracket 14 is attached to the front frame 15, and the outer end portion of the lens 12 is placed on the horizontal portion 16 of the lens bracket 14. The external cold air f passes through the gap 13 where the flange 17 of the lens bracket 14 is broken and opened.
[0017]
FIG. 4 is a front sectional view of a conventional lighting device.
A pair of left and right light shielding plates 20, 20 ′ are disposed in the lower part of the guide 4 in the longitudinal direction of the central axis, and at the same time, a plurality of light shielding plates 21 are disposed circumferentially inside the housing. In such a configuration, the inflow of the external cool air g is small, and the weak cool air h and i is only slightly convected around the lamp sealing portion 2. The external cold air j, k flowing in from the periphery of the light shielding plate 21 is discharged from the housing without contributing to taking away the heat energy of the housing. The hot air l at the top of the lamp is only slightly convection around. Also, the hot air m discharged from the ceiling of the housing is weak.
[0018]
The heat flow state of the conventional lighting device of FIG. 4 is that the air flow in the lamp sealing portion is weak for the lamp and drifts around the lamp sealing portion, and the reflector has a poor air escape on the upper surface of the reflector. A reservoir is formed on the inner side, and the upper discharge surface is narrow at the upper part of the inner vent plate, and air does not enter from the vent holes on the side surface.
[0019]
FIG. 5 is a front sectional view of another embodiment of a conventional lighting device.
In FIG. 5, a pair of left and right light shielding plates 20 and 20 ′ are arranged in the longitudinal direction of the central axis at the lower part of the guide 4, and the internal ventilation plates 30 and 30 ′ are arranged inside the housing with the light source 1 and the housing. It is characterized by being arranged substantially vertically inside and a plurality of horizontal ventilation plates arranged on the left and right of the central axis on the ceiling of the housing.
In such a configuration, the inflow of the external cool air n is small, and the weak cool air o, p is only slightly raised around the lamp 1 or the lamp sealing portion 2. The external cold air q is discharged from the casing without contributing to taking away the thermal energy of the casing. The hot air r at the top of the lamp will be described with reference to FIG.
[0020]
The heat flow state of the conventional lighting device of FIG. 5 is such that the air flow in the lamp sealing portion is weak for the lamp, and the air pool on the reflector inner surface is pulled to the upper reflector surface for the reflector and becomes somewhat weaker. As for the upper part, hot air is sucked into the horizontal ventilation plate on the ceiling, there is no accumulation in the upper part of the inner ventilation plate, and the hot air is discharged to the outside.
[0021]
FIG. 6 is a front cross-sectional view of an experimental sample of the skirt-like vent of the lighting device according to the present invention. In FIG. 6, a pair of left and right light shielding plates 20, 20 ′ are arranged in the longitudinal direction of the central axis at the lower part of the guide 4, and a pair of skirt-like vent holes 8, 8 ′ are arranged. Internal ventilation plates 30 and 30 ′ are disposed substantially vertically inside the housing and inside the housing. Further, a light shielding plate 21 is disposed on the left and right of the central axis in the longitudinal direction on the ceiling of the housing. In such a configuration, the cooling efficiency is the best as compared with FIG. 4 and FIG. 5, but there is little inflow of external cold air, and the cold air convects the lamp 1 or around the lamp sealing portion 2. Is rising. The external cold air k is discharged from the casing without contributing to taking away the thermal energy of the casing. The hot air s at the top of the lamp is discharged weakly.
[0022]
The heat flow state of the conventional lighting device of FIG. 6 is that the amount of air sucked from the pair of skirt-like vent holes to the lamp sealing portion is extremely large for the lamp, and the reflector does not allow air to escape from the inner surface of the upper portion of the reflector. Hot air can be accumulated on the inner surface, and the upper discharge surface is narrow at the top of the internal ventilation plate, so that it can be accumulated inside the housing.
[0023]
FIG. 7 is an experimental sample of the ceiling plate (horizontal ventilation plate) of the ceiling portion of the lighting device according to the present invention, (a) is an experimental example of the horizontal ventilation plate, and (b) is an experimental example of the vertical ventilation plate. It is.
Since a plurality of top plates are arranged in the lateral direction shown in (a), the hot air staying around the ceiling can be efficiently discharged. Further, when a plurality of top plates (vertical ventilation plates) are arranged in the vertical direction shown in (b), hot air staying around the ceiling convects, and the discharge of hot air is weak.
[0024]
FIG. 8 is a side sectional view showing a front frame structure of a conventional lighting device.
Since the front frame of the conventional lighting device is single and no gap 13 is formed between the lens 12 and the front frame 15, external cold air t can be slid up on the lens front surface. External cold air cannot be slid up on the inner surface, and external cold air is convected around the lens mounting portion.
[0025]
FIG. 9 shows temperature transition data at three measurement points of the conventional lighting device and the lighting device (horizontal ventilation plate) of the present invention.
α ₁ , α ₂ , and α ₃ were measured using a conventional lighting device (FIG. 4).
β ₁ , β ₂ , and β ₃ were measured using a conventional lighting device (FIG. 5).
γ ₁ , γ ₂ , and γ ₃ were measured using an experimental sample illumination device (FIG. 6).
δ ₁ , δ ₂ , and δ ₃ were measured using the example of the present invention (FIG. 1).
(A) measured the lamp pinch shield (lamp sealing part / reference 2 in FIG. 1).
(B) measured the reflector.
(C) measured the lens center outer side.
Lamp sealing portion is lowered temperature to 250 ° C. from 260 ° C., in terms of [delta] ₁ is found to be lowest. This means that the embodiment of the present invention has the best cooling efficiency.
[0026]
The temperature of the reflector decreases in the range of 210 ° C. to 190 ° C., but the point of γ ₂ is the lowest and further increases to 200 ° C. at δ ₂ . This means that the cooling efficiency of the skirt-like vent is good.
The lens center outside increases from 290 ° C. or lower to 320 ° C. or higher and decreases to 300 ° C. or lower. As far as the lens center outside is concerned, it can be seen that the conventional illumination device (FIG. 4) or the embodiment of the present invention (FIG. 1) has good cooling efficiency.
[0027]
FIG. 10 shows temperature transition data of three measurement points of the conventional lighting device and the lighting device (vertical ventilation plate) according to the present invention.
α ₄ , α ₅ , and α ₆ were measured using a conventional illumination device (FIG. 4).
β ₄ , β ₅ , and β ₆ were measured using a conventional lighting device (FIG. 5).
γ ₄ , γ ₅ , and γ ₆ were measured using an experimental sample illumination device (FIG. 6).
δ ₄ , δ ₅ , and δ ₆ were measured using the example of the present invention (FIG. 1).
(A) measured the lamp pinch shield (lamp sealing part / reference 2 in FIG. 1).
(B) measured the reflector.
(C) was measured outside the center of the lens.
The temperature of the lamp sealing portion increases from 260 ° C. to 270 ° C., decreases to 255 ° C., and further increases to 260 ° C. This means that the cooling efficiency of the skirt-like vent holes (FIG. 6) indicated by the points γ ₄ and δ ₄ and the embodiment of the present invention (FIG. 1) is good.
[0028]
The reflector rises slightly from 210 ° C., decreases to 190 ° C., and approaches 210 ° C. This means that the cooling efficiency of the skirt-like air hole (FIG. 6) indicated by the point γ ₅ is good.
At the lens center outer side, the temperature rises from 290 ° C. or lower to around 320 ° C. and falls to around 310 ° C. This shows that the conventional illumination device (FIG. 4) or the embodiment of the present invention (FIG. 1) has a good cooling efficiency as far as the lens center outside is concerned.
It was proved that the cooling efficiency of the skirt-like ventilation plate and the ceiling horizontal ventilation plate was very good from the temperature transition data of the three measurement points of the conventional illumination device and the illumination device of the present invention.
[0029]
【The invention's effect】
According to the present invention, a plurality of bottom vent holes for cooling the periphery of the lamp socket are provided, and the structure of the bottom vent plate is combined with a plurality of large and small wedge-shaped metal fittings so that external cold air can flow in an accelerated manner through the bottom vent holes. In addition, a pair of skirt-like vent holes are arranged so that the external cold air can be in direct contact with the lamp sealing portion, and a pair of internal ventilation plates are used to quickly raise the internal hot air after contact with the lamp sealing portion. In order to discharge the overheated internal hot air, a plurality of ventilation plates are arranged substantially horizontally on the ceiling of the housing, and the front frame is used to allow the heat energy accumulated in the lens to flow in, rise and discharge. By forming a gap in the double front frame and allowing external cold air to pass through the lens inner surface, the heat energy stored in the housing, lamp seal or lens is efficiently combined. It can be naturally cooled.
[Brief description of the drawings]
FIG. 1 is a front sectional view of an embodiment of a combined cooling structure of a lighting device according to the present invention.
FIG. 2 is a side sectional view showing a front frame structure of a lighting device according to the present invention.
FIG. 3 is an enlarged view of a gap 13 in a double front frame.
FIG. 4 is a front sectional view of a conventional lighting device.
FIG. 5 is another front cross-sectional view of a conventional lighting device.
FIG. 6 is a front sectional view of an experimental sample of a skirt-like vent of the lighting device according to the present invention.
FIG. 7A is an experimental example of a horizontal ventilation plate.
(B) is an experimental example of a vertical ventilation plate.
FIG. 8 is a side sectional view showing a front frame structure of a conventional lighting device.
FIG. 9 is temperature transition data of three measurement points of the conventional lighting device and the lighting device (horizontal ventilation plate) of the present invention.
(A) Measured value of lamp shield (b) Measured value of reflector (c) Measured value at the center outer side of the lens [FIG. 10] FIG. It is temperature transition data.
(D) Lamp shield measurement value (e) Reflector measurement value (f) Lens center outside measurement value
1: Light source (lamp)
2: Lamp shield (lamp sealing part)
3: Socket 4, 4 ': Guide 5, 5': Bottom vent hole 6, 6 ': Bottom vent plate 7: Skirt-shaped vent inlet opening 7': Skirt-shaped vent vent outlet 8, 8 ': Skirt Ventilation hole 9: Ventilation direction adjusting plate 10, 10 ': Internal ventilation plate 11, 11': Horizontal ventilation plate 12: Lens 13: Gap 14: Lens bracket 15: Front frame a: External cold b: External cold c: Internal hot air d: Internal hot air e: External cold air

Claims (3)

A housing,
A light source disposed on the central axis of the housing;
A lens that transmits light emitted from the light source;
A pair of guides disposed below the light source in parallel with a central axis in which the centers of the light source and the lens are in a straight line;
A lamp socket slidably mounted on a pair of guides;
A plurality of bottom vents formed in the bottom of the housing located below the pair of guides;
A plurality of bottom ventilation plates that are arranged between the pair of guides and the bottom of the casing and allow outside air to flow into the casing through the bottom ventilation holes;
An inlet opening provided below the lamp socket and through which outside air flows, and narrower than the inlet opening so that the air flowing into the housing from the inlet opening contacts the periphery of the lamp socket and A vent outlet formed so as to be positioned above the inlet opening and positioned above the bottom vent hole and the bottom vent plate, and both outer side surfaces of the pair of guides A pair of skirt-like vents arranged in,
A plurality of horizontal ventilation plates symmetrical on the center axis of the ceiling of the housing;
Air that is disposed on both sides of the central axis and outside the light source and above the vent of the skirt-shaped vent, and flows from both the bottom vent and the skirt-shaped vent. A pair of internal ventilation plates to circulate to the horizontal ventilation plate;
An illumination device comprising: A gap is formed between the lens bracket and the front frame by the lens bracket that fixes the outer peripheral surface of the lens and the front frame on which the lens bracket is provided, and air from the outside is formed in the gap. lighting equipment according to claim 1, wherein passing. Said pair of inner vent plate, lateral width perpendicular to the central axis, widening the bottom of the housing, according to claim 1 Symbol mounting lighting device is formed to be narrower top.

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