| 摘要 |
A temperature sensitive safety device (10) comprises a hollow housing (18); two electric conductors (20, 20') guided through the housing (18); and a fusible body (22) arranged inside the hollow housing (18). The fusible body (22) is associated with the electric conductors (20, 20') and is designed to normally provide an electrical connection between the electric conductors (20, 20') in the housing (18), and, in response to an increase of temperature above a predetermined threshold temperature, break the electrical connection between the two electric conductors (20, 20'). According to an important aspect of the invention, the temperature sensitive safety device (10) further comprises a heat collecting structure (24) for transmitting heat from a medium to be monitored to the fusible body (22). The heat collecting structure (24) comprises:
a first layer (26) arranged at least partially outside the hollow housing (18) so as to be in contact with the medium to be monitored; the first layer (26) being of a first material having high thermal conductivity;
a second layer (28) arranged inside the hollow housing (18) ; the second layer (28) being of a second material being electrically insulating and having high thermal conductivity; and
a third layer (30) arranged inside the hollow housing (18) and carrying the fusible body (22); the third layer (30) being of a third material having high thermal conductivity.
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