Waterproof and breathable electric appliance cavity structure and production method of waterproof and breathable film

Abstract

The invention discloses a waterproof and breathable electric appliance cavity structure which comprises a cavity of an electric appliance. The structure is characterized in that a through hole communicating the inside with the outside of the cavity is formed in a cavity wall, a waterproof and breathable film is covered on the through hole, and air holes preventing liquid water from passing are formed in the waterproof and breathable film. Particles become big after water molecules are condensed to become water drops, and due to action (the water molecules pull and contend against each other) of surface tension of the water drops, the liquid water cannot pass a bore diameter capable of allowing free water molecules to pass in a normal-pressure state, so that the waterproof and breathable film is enabled to have a waterproof and breathable function, waterproofing can be realized, and the problems of ventilating and air pressure balancing between the inside and the outside of the cavity of the electric appliance can be solved.

Description

technical field [0001] The invention relates to a waterproof and breathable electrical cavity structure and a production method of a waterproof and breathable film. Background technique [0002] As a kind of electrical appliances, LED lamps are generally divided into three components: 1. The metal shell is used to accommodate other components, to dissipate heat, to protect other components from water, and to realize secondary light distribution. 2. Power drive: used to ensure the normal operation of the LED illuminant and prolong its life. 3. LED illuminant: it consists of several small chips in a single or integrated package. [0003] The waterproofing of outdoor lights mainly depends on the method of sealing and isolation. Generally, rubber pads at the junction and waterproof glue are used to isolate the interior of the lamp body cavity from the outside world. The lamp is in an unbalanced state of internal and external gas pressure. When the lamp is working, the tempera...

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Problems solved by technology

In this way, although the internal and external air pressure can be balanced, it cannot solve the problem of water and dust entering the lamp.

The second is to leave a cavity and seal it with an elastic material, but it can only solve the problem of air pressure balance of small-volume lamps, while outdoor lights are generally large in size, and the effect of gas thermal expansion is large, which is not enough to solve the problem of internal and external air pressure balance.

[0005] The inventor has further learned that the water molecule particles in the free state are very small, but when the water molecules condense into water droplets, the particles become larger, due to the effect of the surface tension of the water droplets (the water molecules "pull and compete" with each other), which can be used for The pore size through which free water molecules pass is impenetrable for liquid water under normal pressure

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