A sealed internal-circulation type cooling system for the bulbs

Abstract

The invention relates to a light bulb sealed internal circulation type heat dissipation system, which includes a light bulb with a built-in wick, an air inlet and an air outlet which are used for heat dissipation of the internal wick are arranged on a lamp cup of the light bulb, the light bulb is arranged in a sealed box body, the interior of the sealed box body is provided with an internal heat dissipation fan and a heat exchange device, the air inlet and the air outlet which are arranged on the lamp cup of the light bulb and the built-in fan and the heat exchange device which are arranged in the sealed box body form an internal circulation heat dissipation system in the sealed box body. The outside of the sealed box body is provided with an external heat dissipation device, and the heat of the heat exchange device in the sealed box body is conducted and dissipated to the outside. The internal circulation type heat dissipation system can not only meet the heat dissipation requirements of the light bulb, but also allow the light bulb to be arranged in the dust-proof box body which is sealed well, so as to ensure the stable work.

Description

【Technical field】 [0001] The invention relates to a heat dissipation technology for projector bulbs, in particular to a light bulb heat dissipation technology for front-projection or rear-projection open-type lamp cups. 【Background technique】 [0002] Most of the projectors on the market now use ultra-high pressure mercury lamps as the light source. The light energy emitted by the light source passes through the illumination optical system to illuminate the imaging device, and then passes through the projection lens to form an image on the projection screen to form an image picture. In order to achieve high brightness of the projected image, the power of the bulb in the projector is gradually increased. The problem brought about is that the heat dissipation requirements of the bulb are becoming more and more stringent. The original closed bulb can no longer meet the heat dissipation needs. All tend to adopt the mode of opening heat dissipation vents on the lamp cup of the bu...

AI Technical Summary

Problems solved by technology

Blowing air to the inside of the bulb can solve the problem of heat dissipation of the wick of high-power bulbs, but the disadvantage is that the dust is easily blown into the interior of the lamp cup with the heat dissipation wind, and adheres to the reflective surface of the lamp cup and the wick, making the reflective surface of the lamp cup It is easy to deposit dust and cause the reflectivity to drop rapidly, thereby reducing the output luminous flux of the bulb; at the same time, the dust brought in can also accumulate on the surface of the wick, which reduces the light transmittance of the wick and weakens the heat dissipation effect, which reduces the luminous efficiency of the bulb. More seriously affect the life of the bulb

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