Electrical appliance with leaktight connections, and a method of fabrication

摘要

An electrical connection is provided for an environment that is subjected to corrosive gases or liquids. An outer insulating layer is formed on each of at least two conductors and made up of a fluorinated polymer that is meltable at a temperature situated between the temperature of the environment and a predetermined higher temperature. A heat-shrink sleeve surrounds the conductors and is made up of an outer layer of heat-shrink polymer and an inner layer of the fluorinated polymer that is meltable at a temperature situated between the temperature of the environment and the predetermined higher temperature. A weld is formed by melting the outer insulating layers of the conductors and the inner layer of the heat-shrink sleeve by heating to a temperature higher than the temperature of the environment and lower than the predetermined higher temperature, thereby making a weld that is continuous and leaktight, and of controlled thickness.

主权项

1. An electrical connection for achieving leaktight electrical linking in an environment that is subjected to corrosive gases or liquids, wherein the connection comprises:
two conductors for forming said electrical connection between each other; an outer insulating layer formed on each of said conductors and made up of a fluorinated polymer that is meltable at a temperature situated between the temperature of said environment and a predetermined higher temperature; a heat-shrink sleeve surrounding said conductors and made up of an outer layer of heat-shrink polymer and an inner layer of said fluorinated polymer that is meltable at a temperature situated between the temperature of said environment and said predetermined higher temperature; a weld formed by the melting of said outer insulating layers of said conductors and said inner layer of said heat-shrink sleeve by heating to a temperature higher than said temperature of said environment and lower than said predetermined higher temperature, thereby making said weld continuous and leaktight, and of controlled thickness; and wherein said inner layer of said heat-shrink sleeve is of a thickness that varies from heating and is adapted to zones for filling around an element for connection of said conductors in order to obtain a weld that is continuous and completely leaktight.