1. A laminate comprising:
a ceramic substrate;
a metal film provided on the ceramic substrate; and
an intermediate layer provided between said metal film and the ceramic substrate, the intermediate layer containing a metal andor an oxide thereof as a main component and having a hole, the metal being different from a metal contained in said metal film; said laminate further comprising a ceramic layer provided on the metal film opposite to the ceramic substrate, wherein said intermediate layer includes a ceramic material which is the same as the ceramic material contained in said ceramic layer and embedded in the hole.
2. The laminate of claim 1, wherein the metal andor the oxide thereof in said intermediate layer has an affinity with said metal film and said ceramic substrate.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A hermetic-type compressor including an electric motor part and a compressor part to be driven by said electric motor part both enclosed in a hermetically sealed container which reserves a lubricant oil, wherein:
said compressor part comprises a crank shaft having a crank part and a main shaft, which has an axis of rotation in a perpendicular direction, and a main shaft bearing for rotatably supporting said main shaft;
a viscous pump is comprised by combining a groove, at least part of which being spiral, formed on the outer periphery of said main shaft, with the inner periphery of said main shaft bearing;
at least one sliding section being in a sliding engagement with said main shaft bearing and at least one non-contact sliding-section having a predetermined gap with said main shaft bearing are formed on the outer periphery of said main shaft which faces said main shaft bearing; and
the lower end of said groove is arranged at said non-contact sliding-section.
2. The hermetic-type compressor in accordance with claim 1, wherein the lower end of said groove is arranged at said non-contact sliding-section beneath said sliding section where said main shaft slides with said main shaft bearing.
3. The hermetic-type compressor in accordance with claim 1, wherein a plurality of non-contact sliding-sections are formed on the face of the outer periphery of said main shaft opposing to said main shaft bearing and the diameter gap between said main shaft and said main shaft bearing at one of said non-contact sliding-section of the lowermost position is formed narrower than the diameter gaps between said main shaft and said main shaft bearing at the other non-contact sliding-sections.
4. The hermetic-type compressor in accordance with claim 2, wherein the diameter gap between said main shaft and said main shaft bearing at said non-contact sliding-section arranged at the lower end of said groove is within a range between 0.05 mm and 0.40 mm.
5. The hermetic-type compressor in accordance with claim 1, wherein the upper end of said groove is arranged at said non-contact sliding-section above said sliding section where said main shaft slides with said main shaft bearing.
6. The hermetic-type compressor in accordance with claim 5, wherein the diameter gap between said main shaft and said main shaft bearing at said non-contact sliding-section arranged at the upper end of said groove is within a range between 0.05 mm and 0.50 mm.
7. The hermetic-type compressor in accordance with any one of claim 1 through claim 6; further comprising an auxiliary shaft being coaxial with said main shaft for sandwiching the crank part, and an auxiliary shaft bearing rotatably supporting said auxiliary shaft.
8. The hermetic-type compressor in accordance with claim 7; wherein one sliding section of said main shaft with said main shaft bearing is formed on the face of the outer periphery of said main shaft.
9. The hermetic-type compressor in accordance with claim 1, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
10. The hermetic-type compressor in accordance with claim 2, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
11. The hermetic-type compressor in accordance with claim 3, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
12. The hermetic-type compressor in accordance with claim 4, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
13. The hermetic-type compressor in accordance with claim 5, said hermetic-type compressor is driven by an verter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
14. The hermetic-type compressor in accordance with claim 6, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
15. The hermetic-type compressor in accordance with claim 7, said hermetic-type compressor is driven by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.
16. The hermetic-type compressor in accordance with claim 8, said hermetic-type compressor is drien by an inverter at a plurality of driving frequencies including at least a driving frequency not greater than the power frequency.