Air-tight type low-voltage electrical apparatus with working contact and its oxygen-free seal method

Abstract

The invention is concerned with the airtight low voltage apparatus with working contact and its no-air sealing method. For example, the no air no arc AC contactor, includes the airtight room with the tegmen and the base, which is fixed with the electromagnetism operating system, the contact operating system, and the energy-saving rectifier circuit board, also, the fixed contact down-lead and the coil down-lead. The edge of the tegmen connects the base form the ring of notch. The edge of the base connects the tegmen form the ring of uplift, which joins with the notch makes the tegmen, the base become one, form the airtight room. The invention also provides the method of sealing, it is: conducts the anaerobic treatment to airtight room, fills in with the inert gases and sealant, which this way prolongs the no-air environment to ensure the performance of the moving / fixed contacts.

Description

technical field [0001] The invention relates to an airtight low-voltage electrical appliance with working contacts, in particular to an arc-free AC contactor with an airtight chamber, and an oxygen-free sealing method for the airtight chamber. Background technique [0002] The same kind of low-voltage electrical appliances with working contacts currently on the market, such as contactors, work in the atmosphere, and the oxidation of the contacts is very serious. Oxidation of the contacts causes carbonization, ignition, and ignition of the conductive parts of the product, which significantly increases reactive power loss, excessive temperature rise, and low service life. As we all know, the loss generated by electrical products is generally composed of reactive power loss, electric corrosion and electrolysis, among which reactive power loss accounts for more than 60%. People have thought of sealing the working contacts in an airtight chamber. Compared with an aerobic environ...

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Problems solved by technology

[0004] 1. The process of injecting argon ions is complicated, the processing cost is high, and the arc extinguishing effect is not ideal;

[0005] 2. Directly fill the inert gas into the box body, that is, the box body is not anaerobic before filling the inert gas, so due to the effect of the residual air in the box body, the problem of oxidation and carbonization of the working contacts cannot be completely solved ;

[0006] 3. The box body formed by gluing the base and the shell, due to the unreasonable structural design of the glued interface between the base and the shell, the sealing effect is not good;

[0007] 4. The inert gas filled in the box is 1.5-2 atmospheres, so there is a serious leakage problem in the box, which affects the stability and life of the product

[0009] Due to the defect that the above-mentioned existing technology cannot meet the requirements of users, the airtight chamber designed and manufactured by using the sealing structure and anaerobic sealing treatment method of the above-mentioned prior art cannot meet the AC contactor with high rated current and high life expectancy at all. For example, the requirements for the use of AC contactors for air conditioners with a rated current 6 times greater than the national standard and a service life greater than 30,000 times

The sealing problem of the airtight chamber is a common technical problem in low-voltage electrical appliances with working contacts such as AC connectors, electromagnetic relays, and current breakers. So far, no existing technology that can better solve this problem has been seen.

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