| 摘要 |
<p>PURPOSE: A condenser which uses an organic solvent as an electrolyte sometimes suffers rupture when the pressure in the condenser is abnormally elevated. To prevent the occurrence of such rupture, safety valves operated particularly at a low pressure are needed. CONSTITUTION: A safety valve element for condenser use is provided, which stably operates especially in a predetermined low pressure range and rupture precisely at a predetermined pressure for releasing inner pressure outside and can be manufactured readily. A condenser is also provided, which incorporates the safety valve elements. The safety valve element for condenser use can readily provide a rupture portion having a uniform thickness so that the irregularity on inner pressure which causes rupture can be minimized. The safety valve element for condenser use is made of a composite material which is produced using cold pressure welding so that the lowering of the strength of material can be minimized. A condenser case lid is formed after the metal substrate is provided with a perforated opening and pressure welded together with the metal foil serving as a safety valve.</p> |
