WO2019128340A1

WO2019128340A1 - Heat dissipation system for gas-discharge lamp

Info

Publication number: WO2019128340A1
Application number: PCT/CN2018/107072
Authority: WO
Inventors: 蒋伟楷
Original assignee: 广州市浩洋电子股份有限公司
Priority date: 2017-12-30
Filing date: 2018-09-21
Publication date: 2019-07-04
Also published as: CN108050498B; CN108050498A

Abstract

The present invention relates to the technical field of stage lighting and provides a heat dissipation system for a gas-discharge lamp. The system structurally comprises a parabolic reflector, a lamp body disposed within the parabolic reflector, an air supply device, and an air guide device in communication with the air supply device. The air guide device comprises a parabolic reflector air channel and an air channel switch mechanism. The parabolic reflector air channel delivers air along the lamp body from one side of the parabolic reflector toward the other side of the parabolic reflector to be discharged out of the parabolic reflector. The air channel switch mechanism switches an air guide direction in the parabolic reflector air channel, such that the parabolic reflector air channel is altered in a circumferential direction of the parabolic reflector. The heat dissipation system for a gas-discharge lamp provided by the invention is capable of changing the air channel in an axial direction, such that air can be delivered to every surface of the lamp body, and accordingly the lamp body has uniform temperature distribution on the same cross section in a direction perpendicular to an optical axis. In addition, the air forms a downward flow in accordance with gravitational pull, thereby uniformly cooling all surfaces, reducing temperature differences on the outer surfaces of the lamp body, and reducing the probability of light bulb damage.

Description

Gas discharge lamp cooling system

Technical field

The invention relates to the field of lighting technology, in particular to the field of stage lighting technology, and more particularly to a gas discharge lamp heat dissipation system.

Background technique

The lighting design includes the design of outdoor lighting, indoor lighting, stage lighting and automotive lighting, selecting different lighting methods and lamps according to different spaces, different occasions and different objects, and ensuring proper illumination and brightness. Lights illuminate in certain things or spaces, and things or spaces are given a unique atmosphere, style and depth by the lighting design that attaches to the life texture.

Among them, stage lighting is an important means of stage art, using stage lighting equipment and technical means, with the development of the plot, with light color and its changes, showing the environment and rendering atmosphere, highlighting the central figure, creating a sense of stage space and time, Shape the exterior image of the stage performance and provide the necessary lighting effects. To achieve these effects and purposes, there is a high demand for stage lighting equipment.

A gas discharge lamp is a light source that converts electrical energy into light energy by a gas, metal vapor or a mixture of several gases and metal vapor. It is widely used in the field of lighting technology, especially in the field of stage lighting technology.

The high-intensity gas discharge lamp used in the field of moving head lamps requires high temperature control. The core area can neither be too cold nor overheated. Overheating can cause the internal pressure of the gas discharge lamp to rise and the bulb to burst. If it is too cold, it will lead to the inside of the bulb. The air pressure is not enough to affect the light efficiency, and the temperature difference between the different positions of the bulb sphere is not required to be too large. Since the internal gas chamber of the gas discharge lamp is completely isolated from the outside world, the external airflow change cannot affect the internal convection heat dissipation, so the gas discharge lamp will cause the temperature of the vertical gravity upward surface of the gas chamber to always be higher than the vertical downward side. Because of the high power density, the current heat dissipation design uses the blower to blow both ends of the bulb and the main sphere of the bulb so that the cold end temperature of the bulb is not too high. However, such a heat dissipation method is basically a fixed air blowing scheme, and the cold air is continuously fixedly blown in, so that the temperature of the bulb center is lower than the temperature of the leeward side. In addition, when a special posture occurs in the gas discharge lamp, such as side hanging, the rotation of the lamp head causes an angle change between the air inlet and the gravity direction. The extreme case is that the face of the cooling air is exactly the center of the bulb. The cold end, which is the lower end of gravity, will cause a greater difference in temperature between the two sides, which will increase the chance of bulb damage.

technical problem

In order to overcome the defects of the prior art, the present invention provides a heat dissipating system for a gas discharge lamp body, and the air is blown from the different angles of the lamp body to the other side through the circumferentially changing air inlet position, thereby achieving uniform heat dissipation to the lamp body. .

Technical solution

In order to achieve the above object, the technical solution adopted by the present invention is:

A gas discharge lamp heat dissipation system, the gas discharge lamp comprising a reflective bowl and a lamp body disposed in the reflective bowl, the heat dissipation system comprising a blowing device and a wind guiding device communicating with the air blowing device, the wind guiding device comprising reflective The bowl air duct and the air duct switching mechanism, the reflective bowl air duct includes an air inlet, and the reflective bowl air duct sends the wind from the side of the reflective bowl and the other side of the reflective bowl to the outside of the reflective bowl, and the air passage switching mechanism passes Switching the air inlet to change the air guiding direction of the reflective bowl air duct, so that the reflective bowl air duct changes along the circumferential direction of the reflective bowl.

According to the gas discharge lamp heat dissipation system provided by the invention, the air passage switching mechanism of the air guiding device continuously changes the air inlet position, and the wind is blown to the respective surfaces of the lamp body through the reflective bowl air passage, so that the lamp body is perpendicular to the optical axis The same section temperature distribution is uniform, and some parts will not be too cold or overheated, forming a temperature difference, causing the bulb to burst.

The gas discharge lamp heat dissipation system further includes a fixing bracket for fixing the reflective bowl, wherein the fixing bracket is provided with an opening corresponding to the light exiting opening of the reflective bowl, and the opening of the fixing bracket is provided with a plurality of ventilation openings, and the reflective bowl air passage The wind is blown from one side of the fixed bracket to the lamp body in the opening, and is sent out by the other side vent on the fixed bracket. The air duct cutting mechanism is used to switch the position of the air inlet of the reflective bowl air duct and the air outlet position of the ventilating opening. .

Preferably, in the gas discharge lamp heat dissipation system, the air duct cutting mechanism comprises a fixed air guiding shell connected to the fixing bracket and a rotatable air guiding shell sleeved in the fixed air guiding shell, the rotatable guiding The wind shell is connected with a power device for driving the rotation; the side wall of the fixed air guiding shell is provided with a first air inlet, the first air inlet is connected with the air blowing device; and the rotatable air guiding shell is The side wall is provided with a second air inlet communicating with the first air inlet, and the second air inlet is communicated with the air vent through the opening.

After the cold air of the solution enters the second air inlet through the air inlet through the first air inlet, the wind blows over the middle shaft of the lamp body to the other side, and exits from the air vent. Under the action of the power device, the rotatable wind guide shell continuously rotates, and the position of the second air inlet port also continuously performs a circular motion, that is, the position of the second air inlet port is circumferentially changed. Therefore, the cold air can be blown from the different angles of the lamp body to the other side, and the temperature difference on the same spherical surface of the lamp body can be reduced.

In order to make the wind form a downward flow along the gravity, all the faces can be uniformly cooled, the temperature difference of the outer surface of the lamp is reduced, and the probability of damage of the lamp body is reduced. The rotatable air guiding shell has an annular bottom portion, and the annular bottom portion is provided with an air outlet opening communicating with the venting opening, and the air outlet opening and the second air inlet opening are located opposite to the rotatable air guiding shell side.

Preferably, in the above gas discharge lamp heat dissipation system, the power unit includes a driven transmission gear disposed on the rotatable wind guide shell, a driving transmission gear meshing with the driven transmission gear, and the driving transmission gear Powered motor.

Since the stepping motor is an open-loop control element stepping motor that converts the electric pulse signal into an angular displacement or a line displacement, when the stepping driver receives a pulse signal, it drives the stepping motor to rotate in a set direction. The angle, its rotation is run step by step at a fixed angle. The angular displacement can be controlled by controlling the number of pulses to achieve the purpose of accurate positioning. At the same time, the speed and acceleration of the motor rotation can be controlled by controlling the pulse frequency to achieve the purpose of speed regulation. Therefore, in order to further control the angle of rotation of the rotating wind deflector, the motor arrangement is preferably a stepper motor.

In order to determine the initial position of the second air inlet, the rotatable wind guide is provided with a magnetic induction device for sensing the initial position of the second air inlet to indicate the angle at which the stepping motor rotates. The magnetic induction device includes a magnet or a magnetic field sensor disposed on the rotatable air guiding shell, and a magnetic field sensor or magnet disposed on the fixed air guiding shell. In addition to being placed in a fixed air guiding casing, it may be in other locations that do not interfere with changes in its induced magnetic field.

In order to enable the gas discharge lamp body heat dissipation system to be applied to the moving head lamp, the lamp body is provided with a three-axis gravity sensor, and the driving step of the stepping motor is controlled by sensing the angle of the lamp body offset. Because the hot air rises and the cold air sinks, the upper air is most likely to heat up when the airflow inside the reflective bowl is formed. It needs to be dissipated with the air with the lowest temperature that has just entered, and then the air enters and then the heat is taken away. More, the temperature itself will be higher and higher, and the second air inlet can be rotated above the lamp body by setting a three-axis gravity sensor. Preferably, the second air inlet rotates to a highest position from the ground.

Preferably, in the gas discharge lamp heat dissipation system described above, the air blowing device is a blower or a fan.

In addition, in the gas discharge lamp heat dissipation system, the air duct cutting mechanism includes a fixed air guiding shell connected to the fixing bracket and an air guiding inner shell sleeved in the fixed air guiding shell, the air guiding inner shell circumference a plurality of valves are arranged upwardly, the fixed air guiding shell is provided with an air inlet, the first air inlet is connected with the air blowing device, the valve is connected with the first air inlet; the air guiding inner shell has a ring a bottom portion is provided with a plurality of air outlets communicating with the vents, and the respective air outlets are disposed opposite to the respective valves.

The cold air of the scheme enters the air inlet through the air blowing device, and the wind coming out from the air inlet port is blown out from the selected valve to the lamp body, and then flows out of the lamp body through the air outlet. That is to say, the reflective bowl air duct is combined by an air inlet, a valve and an air outlet. The cold air can be blown from the different angles of the lamp body to the other side to achieve uniform heat dissipation of the lamp body, and the temperature difference on the same spherical surface of the lamp body is reduced.

Moreover, an infrared ultraviolet cut filter is fixed on the air guiding device to prevent infrared ultraviolet radiation.

Beneficial effect

Compared with the prior art, the beneficial effects produced by the present invention are as follows:

(1) The air inlet position of the gas discharge lamp heat dissipation system provided by the present invention can be constantly changed, and the cold air can be blown to each surface of the lamp body, so that the temperature distribution of the lamp body in the same section perpendicular to the optical axis is uniform, and no certain occurrence occurs. Some parts are too cold or too hot, forming a temperature difference, causing the bulb to burst.

(2) The air inlet position of the gas discharge lamp heat dissipation system provided by the present invention can produce a circumferential change, and the cold air can be blown from the different angles of the lamp body to the other side, and exits from the air outlet to form a downward flow along the gravity. It can evenly cool all the faces, reduce the temperature difference of the outer surface of the lamp, and reduce the chance of damage to the lamp body.

(3) The gas discharge lamp body heat dissipation system provided by the present invention controls the driving step of the stepping motor by setting a magnetic field sensor and a three-axis gravity sensor to sense the angle of the lamp body offset, and rotates the second air inlet port To a specific position, the stepper motor can be controlled to rotate the rotatable wind guide shell by sensing the spatial azimuth of the lamp body.

DRAWINGS

Figure 1 is a schematic view of the structure of the present invention

Figure 2 is a schematic exploded view of the structure of the present invention;

Figure 3 is a schematic view showing another structure of the present invention;

Figure 4 is a schematic view of the cold air flow direction of the present invention;

Figure 5 is a view showing the effect of the heat dissipation system of the gas discharge lamp body of the present invention from the incoming air to the wind to the lamp body;

Fig. 6 is a view showing the effect of the heat discharge system of the gas discharge lamp body of the present invention from the wind to the lamp body to the air outlet.

The reference numerals are: air supply device 100; air guiding device 200; fixed air guiding housing 210; first air inlet 211; rotatable air guiding shell 220; second air inlet 221; air outlet 222; Wind nozzle 224; motor 300; drive gear 310; driven drive gear 320; reflective bowl 400; fixed bracket 500; vent 510; infrared ultraviolet filter 600.

BEST MODE FOR CARRYING OUT THE INVENTION

实施例一Embodiment 1

The gas discharge lamp heat dissipation system designed according to the present invention has a specific structure as shown in FIG. 1, FIG. 2 and FIG. 3, a gas discharge lamp heat dissipation system, and the structure thereof comprises a reflective bowl 400 and a gas discharge placed in the reflective bowl 400. The fixing bracket 500 of the lamp and the fixed reflector bowl further includes an air blowing device 100 and an air guiding device 200 communicating with the air blowing device 100. The fixing bracket 500 is provided with an opening corresponding to the light exiting opening of the reflective bowl 400, and is fixed. A plurality of vents 510 are provided on the outer periphery of the opening of the bracket 500, and an infrared ultraviolet cut filter 600 is disposed on the air guiding device 200.

The air guiding device 200 includes a reflective bowl air duct and a air duct switching mechanism, and the air duct switching mechanism includes a fixed air guiding shell 210 connected to the fixing bracket 500 and a rotatable sleeve disposed in the fixed air guiding shell 210. a wind deflector 220, the rotatable wind deflector 220 is connected with a power device that drives the rotating air shell 220; the side wall of the fixed air guiding shell 210 is provided with a first air inlet 211, the first air inlet 211 and the The air blowing device 100 is connected to each other; the side wall of the rotatable air guiding shell 220 is provided with a second air inlet 221 communicating with the first air inlet 211, and the second air inlet 221 is connected to blow the wind toward the lamp body. The air vent 224 has a circular bottom 223, and the annular bottom 223 defines an air outlet 222 communicating with the vent 510, and the air outlet 222 and the air outlet 222 The two air inlets 221 are disposed on opposite sides of the rotatable air guiding shell.

The power unit includes a driven transmission gear 320 disposed on the rotatable wind deflector 220, a drive transmission gear 310 engaged with the driven transmission gear 320, and a motor 300 that powers the drive transmission gear 310.

The air blowing device 100 is a blower or a fan.

The cold air flow direction of the gas discharge lamp body heat dissipation system of this embodiment is as shown in FIG. 4, and after the cold air enters the second air inlet 221 through the first air inlet 211 through the air blowing device 100, the wind blows over the middle shaft of the lamp body to the other side. One side flows out from the air outlet 222 through the vent 510. The effects of the gas discharge lamp body heat dissipation system of the present invention are shown in Figs. 5 and 6.

The cold air of the embodiment can be blown from the different angles of the lamp body to the other side to reduce the temperature difference on the same spherical surface of the lamp body; and the cold air can form a downward flow of air along the gravity, so that all the faces can be cooled. Reduce the temperature difference on the outer surface of the lamp and reduce the chance of damage to the lamp body.

Embodiments of the invention

实施例二Embodiment 2

The difference between the embodiment and the first embodiment is that the motor 300 is a stepping motor, and the rotatable air guiding shell 220 is provided with a magnet, and the fixed air guiding shell 210 is provided with a magnetic field sensor, and the lamp body is disposed on the lamp body. There are three-axis gravity sensors.

Combining the angle of the three-axis gravity sensor to sense the deviation of the lamp body and the initial position of the second air inlet 221 determined by the magnetic field sensor, the driving step of the stepping motor is controlled, so that the second air inlet 221 is always in the lamp body. Above. Further, the second air inlet 221 can be rotated to the highest position from the ground.

The heat dissipation system of the embodiment can sense the spatial azimuth of the lamp body to control the stepping motor to rotate the rotatable wind guide casing, and the design can be applied to the lamp body of the moving head.

实施例三Embodiment 3

The difference between the embodiment and the first embodiment is that the air duct cutting mechanism comprises a fixed air guiding shell connected to the fixing bracket and an air guiding inner shell sleeved in the fixed air guiding shell, the air guiding inner shell a plurality of valves are arranged in the circumferential direction, the fixed air guiding shell is provided with an air inlet, the first air inlet is connected with the air blowing device, and the valve is connected with the first air inlet; the air guiding inner shell has a circle a bottom portion of the ring is provided with a plurality of air outlets communicating with the vents, and the respective air outlets are disposed opposite to the respective valves.

It is apparent that the above-described embodiments of the present invention are merely illustrative of the present invention and are not intended to limit the embodiments of the present invention. Other variations or modifications of the various forms may be made by those skilled in the art in light of the above description. There is no need and no way to exhaust all of the implementations. Any modifications, equivalent substitutions and improvements made within the spirit and scope of the invention are intended to be included within the scope of the appended claims.

Claims

A gas discharge lamp heat dissipation system, the gas discharge lamp comprising a reflective bowl and a lamp body disposed in the reflective bowl, wherein the heat dissipation system comprises a blowing device and a wind guiding device connected with the air blowing device, The wind device comprises a reflective bowl air duct and a air duct switching mechanism, the reflective bowl air duct comprises an air inlet, and the reflective bowl air duct sends the wind from the side of the reflective bowl and the light body to the other side of the reflective bowl to the outside of the reflective bowl, the wind The track switching mechanism changes the air guiding direction of the reflective bowl air passage by switching the air inlet, so that the reflective bowl air passage rotates circumferentially along the reflective bowl.
The heat dissipating system for a gas discharge lamp according to claim 1, further comprising a fixing bracket for fixing the reflecting bowl, wherein the fixing bracket is provided with an opening corresponding to the light exiting opening of the reflective bowl, and the opening of the opening of the fixing bracket is set There are a number of vents, and the reflective bowl air duct blows the wind from the side of the fixed bracket to the lamp body and is sent out by the vent on the other side of the fixed bracket. The air duct switching mechanism is used to switch the position of the air inlet of the reflective bowl air duct and the ventilation. The position of the air outlet.
The gas discharge lamp heat dissipation system according to claim 2, wherein the air duct switching mechanism comprises a fixed air guiding shell connected to the fixing bracket and a rotatable air guiding shell sleeved in the fixed air guiding shell. The rotatable air guiding shell is connected with a power device for driving the rotating air; the side wall of the fixed air guiding shell is provided with a first air inlet, and the first air inlet is connected with the air blowing device; The side wall of the rotating air guiding shell is provided with a second air inlet communicating with the first air inlet, and the second air inlet is communicated with the air vent through the opening.
The gas discharge lamp heat dissipation system according to claim 3, wherein the rotatable air guiding shell has an annular bottom portion, and the annular bottom portion is provided with an air outlet opening communicating with the air vent. The air outlet and the second air inlet are located on opposite sides of the rotatable air guiding shell.
A gas discharge lamp heat dissipation system according to claim 3, wherein said power unit comprises a driven transmission gear disposed on the rotatable wind guide housing, a driving transmission gear meshing with said driven transmission gear, and A motor that powers the drive transmission gear.
The gas discharge lamp heat dissipation system according to claim 5, wherein the motor is a stepping motor.
The gas discharge lamp heat dissipation system according to claim 3, wherein the rotatable air guiding shell is provided with a magnetic induction device for sensing an initial position of the second air inlet.
The gas discharge lamp heat dissipation system according to claim 5, wherein the lamp body is provided with a three-axis gravity sensor, and the number of driving steps of the stepping motor is controlled by sensing an angle at which the lamp body is offset.
The gas discharge lamp heat dissipation system according to claim 8, wherein the second air inlet is rotated to the upper side of the lamp body by sensing an angle at which the lamp body is offset.
The gas discharge lamp heat dissipation system according to claim 9, wherein said second air inlet is rotated to a highest position from the ground.
A gas discharge lamp heat dissipation system according to claim 1, wherein said air blowing means is a blower or a fan.
The gas discharge lamp heat dissipation system according to claim 2, wherein the air passage switching mechanism comprises a fixed air guiding shell connected to the fixing bracket and a wind guiding inner shell sleeved in the fixed air guiding shell, a plurality of valves are arranged in the circumferential direction of the inner casing of the wind guide, and the fixed air guiding shell is provided with a first air inlet, the first air inlet is connected with the air blowing device, and the valve is connected with the first air inlet; The inner casing of the air guide has an annular bottom portion, and the bottom portion is provided with a plurality of air outlets communicating with the vents, and the respective air outlets are disposed opposite to the respective valves.
The gas discharge lamp heat dissipation system according to any one of claims 1 to 12, characterized in that the air guiding device is fixed with an infrared ultraviolet cut filter.