3 pin WL032F2-1.5-21 Automobile Waterproof Cable Electrical Connector Wiring Socket For 1.5 Series

The condensation phenomenon under laboratory conditions mainly includes two situations. One is that it occurs in the heating stage. During the heating process, the surface temperature of the shell is lower than the ambient temperature. When the air on the outer surface of the shell encounters the surface of the product whose temperature is lower than the dew point, water vapor will condense on the outer wall of the shell to form condensation.

The other is in the cooling stage, the external environment cools down first, so the inner wall of the shell is cooler than the internal air. If the temperature of the inner wall of the shell reaches the dew point temperature of the internal air, condensation will form on the inner wall of the shell.

The condensation problem we want to solve is mainly the second one, which is to avoid condensation on the inner wall and affect the performance of internal electrical components. Condensation is the result of the joint action of temperature and humidity. The ambient humidity is high and the climate temperature difference is large, so condensation is easy to occur;

my country has a vast territory and huge climate differences. The humidity in the coastal environment is high, and the temperature difference in the northwest region changes greatly. Such areas are generally more prone to condensation.

After the metal surface is coated with a silica gel desiccant coating, when the metal surface temperature is lower than the dew point temperature and water is separated out, it will first be adsorbed into the metal surface coating, and condensation will not appear until the adsorption is saturated. Therefore, coating the metal surface with a silicone coating can effectively delay the generation of condensation for a certain period of time, but it cannot achieve the purpose of dehumidification, and it increases the processing and maintenance costs and installs a breather valve.

Siphon:

There are two main ways for electronic components such as connectors to enter water. The first is that the external liquid penetrates into its interior by gravity, such as a connector without a sealing ring, or moisture from the internal connection point of the wiring harness (such as an unprotected solder joint) / crimping point/ grounding point) to enter; the word "siphon" is emphasized here, because the general electrical appliance has a certain temperature when it is working, and the internal air forms a certain pressure. When it stops working, the temperature drops and the internal pressure is also small. When the air pressure difference is formed, if the connector is not well sealed, water vapor will enter the interior along the gap between the multi-strand copper wires, resulting in functional failure.

that the N509 plug of the transmission oil cooling valve leaks antifreeze, and the antifreeze enters the J217 plug (7) of the transmission computer along the N509 plug (1) line, causing a fault (liquid siphon phenomenon)

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