Relay, relay vacuumizing and air inflation system and relay vacuumizing and air inflation method

Abstract

The invention relates to the field of a low-voltage electric appliance, in particular to a relay. The relay comprises a cover case and a base connected with the cover case, wherein the cover case andthe base are matched to form a sealed installing space; an air inflation opening is formed in the base; an elastic sealing body in interference fit with the air inflation opening is arranged in the air inflation opening; the outer side of the elastic sealing body is tightly attached to the inner side of the air inflation opening; an air pin penetrates through the middle part of the elastic sealingbody, so that the vacuumizing or the air inflation is performed in the installation space. The elastic sealing body of the relay forms a first seal of the air inflation opening; the vacuumizing operation, the air inflation operation and the sealing operation continuity of the relay are favorably improved; the operation efficiency is improved; further, the air tightness of the vacuumizing and airinflation operation of the relay is ensured. The invention also provides a relay vacuumizing and air inflation system, which has the advantages that the operation is simple and convenient; the work efficiency is high; the air tightness of the product is high. The invention also provides a relay vacuumizing and air inflation method, which has the advantages that the operation is simple; the feasibility is high; the method is applicable to automatic production; the air tightness of the product is good; the qualified rate is high.

Description

technical field [0001] The invention relates to the technical field of low-voltage electrical appliances, in particular to a relay, a relay vacuuming and filling system for vacuuming and filling the relay, and a relay vacuuming and filling method using the system. Background technique [0002] After the existing relay is evacuated and filled with inert gas, due to the unbalanced air pressure inside and outside the relay, the inert gas leaks out or the outside gas mixes into the product, which affects the sealing effect of the product and further affects the arc extinguishing effect of the product. [0003] Most of the existing low-voltage sealed relays filled with inert gas are sealed with solid sealant, and a few are sealed with molten matrix materials. Regardless of which sealing method is used, the operation is more complicated. The vacuuming, inflation and sealing of the relay The operation continuity is poor, which affects the production efficiency, and there is a risk ...

AI Technical Summary

Problems solved by technology

[0002] After the existing relay is evacuated and filled with inert gas, due to the unbalanced air pressure inside and outside the relay, the inert gas leaks out or the outside gas mixes into the product, which affects the sealing effect of the product and further affects the arc extinguishing effect of the product

[0003] Most of the existing low-voltage sealed relays filled with inert gas are sealed with solid sealant, and a few are sealed with molten matrix materials. Regardless of which sealing method is used, the operation is more complicated. The vacuuming, inflation and sealing of the relay The operation continuity is poor, which affects the production efficiency, and there is a risk of inert gas leakage inside the product (internal gas positive pressure) or external air mixing (internal gas negative pressure) during the process of relay vacuuming, filling inert gas and sealing. , affecting the arc extinguishing performance of the relay; the relay sealed with solid sealant, due to the influence of positive or negative gas pressure inside the relay, is prone to bulging of solid sealant (internal gas positive pressure) or glue leakage into the relay (internal gas Negative pressure), affecting the normal use of the product or even functional failure; relays using matrix fusion sealing, in addition to the same problem of gas leakage or air mixing, the process requirements of the matrix melting method are relatively high, and it is not suitable for thermosetting materials Made of base material (thermosetting materials cannot be melted and deformed)

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