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(11) | EP 1 359 324 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Sealed type compressor |
| (57) An attempt has been made to prevent damage of a hermetic terminal and to improve
pressure-resistance strength of the welded joint of connecting pipes in order to provide
a sealed housing 4 having a pressure-resistance strength high enough to allow use
of a high-pressure alternative refrigerant. For this purpose, ring-shaped metal members
15 and 23 are welded to the outer peripheries of the welded joints of a hermetic terminal
8 to be hermetically welded to an upper end plate 1 of a sealed housing 4 and a discharge
pipe 10. As a result, in the event the internal pressure of the sealed housing 4 increases
and the upper end plate 1 deforms in the shape of a sphere, the ring-shaped metal
member 15 on the outer periphery of the welded joint of the hermetic terminal 8 suppresses
the deformation of the hermetic terminal 8 thus preventing damage of a glass seal
12 of the hermetic terminal 8, and the ring-shaped metal member 23 on the outer periphery
of the welded joint of the discharge pipe 10 decreases the tensile stress produced
in the welded joint of the discharge pipe 10 thus improving the pressure-resistance
strength of the connecting section of the discharge pipe 10 thereby providing a sealed
type compressor having a sealed housing 4 with a sufficiently high pressure-resistance
strength. |