Internal and external air pressure balancing system for waterproof lamp

Abstract

The invention discloses an internal and external air pressure balancing system for a waterproof lamp. The system comprises at least one lamp, wherein a closed chamber is formed in the lamp. The system also comprises an internal and external air pressure balancing structure communicating to the closed chamber. The internal and external air pressure balancing structure comprises an air pipe joint and an air pipe fixed to the side wall of the lamp. One end of the air pipe is connected to the air pipe joint while the other end of the air pipe is arranged in a dried environment and communicates to the outside. By stretching the air pipe in the closed chamber, the end part of the air pipe is located in the dried environment and communicates to the outside. The lamp is balanced in internal and external pressures in any states by means of the air pipe, so that the technical problem that the lamp is internally misted and condensed, or even fails in sealing as a result of stress to the lamp due to position and negative pressures generated by change of temperature. The internal and external air pressure balancing system for the waterproof lamp is simple and reasonable in structural design, convenient to mount and easy to implement. The internal and external pressures of the lamp are balanced, so that the service life of the lamp is prolonged, and the lamp is high in practicality.

Description

technical field [0001] The invention relates to the technical field of lighting, in particular to a system for balancing internal and external air pressure of a waterproof lamp. Background technique [0002] At present, LED lamps are becoming the main product in the new generation lighting market due to their technical characteristics of high efficiency, energy saving, longevity, and compactness, and they have effectively stimulated the rapid development of the environmental protection and energy saving industry. Existing outdoor lamps have high requirements for waterproof structure and performance, generally above IP67. In order to achieve waterproof IP value, a silicone ring or glass structural glue with particularly strong adhesion will be installed at the connection between the light-transmitting panel and the lamp housing. , such a structure makes the interior of the luminaire form a sealed chamber with waterproof function, but because the luminaire works in various out...

AI Technical Summary

Problems solved by technology

Existing outdoor lamps have high requirements for waterproof structure and performance, generally above IP67. In order to achieve waterproof IP value, a silicone ring or glass structural glue with particularly strong adhesion will be installed at the connection between the light-transmitting panel and the lamp housing. , such a structure makes the interior of the luminaire form a sealed chamber with waterproof function, but because the luminaire works in various outdoor environments for a long time, especially the luminaire buried under the ground, the heat accumulated in the airtight chamber will make the The temperature inside the lamp rises. If the inside of the sealed lamp is in a high-pressure, high-temperature and high-humidity environment for a long time, the light decay speed of the LED light source structure will be accelerated, and the service life of the lamp will be shortened.

[0003] At the same time, according to the gas state equation PV=nRT, it can be seen that the gas pressure P in the airtight container is proportional to the temperature T, that is, the higher the temperature, the greater the pressure in the airtight space. Since the outdoor lamps are installed outdoors, the temperature changes greatly, such as the sun during the day Direct sunlight and high temperature make the pressure in the airtight chamber strong, and the pressure difference between the inside and outside of the lamp is large, so that the waterproof part has to bear a large or even several times the normal expansion stress. If it is a sealing ring, it is easy to deform and break and make the waterproof Failure, if it is a glass structural adhesive, it will gradually lose its elasticity under the impact of internal pressure and expansion stress for a long time to reduce its adhesive force, and the waterproof will fail over time, eventually causing rainwater and humid air to enter the closed chamber, causing Fog and condensation on the lamps will affect the lighting effect, and even water will damage the electronic components and shorten the service life of the lamps

[0004] Moreover, in case of sudden rainfall or in areas with large temperature difference between day and night, the rainfall or temperature difference will cause the lamp to cool down rapidly, and a vacuum negative pressure of 200 MPa or even greater will be formed in the airtight chamber during cooling, and the pressure difference between the inside and outside of the lamp will be large, resulting in external air and humid gas It enters the inside of the lamp housing through the closed gap or the failed gap, forming fog and affecting the lighting effect. Such a vicious circle will directly affect the service life of the lamp, increase the failure rate, and cause serious quality problems in the project.

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