To maintain a refrigerating machine oil level in a compressor in a range of not impairing performance and reliability of the compressor by arranging an oil returning hole in a suction pipe to return refrigerating machine oil to the compressor side from a liquid reserving means.
Oil having noncompatibility or feeble compatibility to a liquefied refrigerant and low density to this liquefied refrigerant, is used as refrigerating machine oil. An oil returning hole 21 is arranged in a position where a liquefied refrigerant 14 corresponding to the compressor volume (an A part) up to a refrigerant delivery port 22 existing on the upper end of a delivery muffler 23 covering a bearing from a refrigerating machine oil supply port 18 surface on the lower end of a main shaft 17, can be stored in a liquid reserving muffler 19. This position is a height directional almost central part of a suction pipe 20. The oil returning hole 21 is set so that an upper surface of refrigerating machine oil 15 in a compressor 1 is always maintained between the refrigerant delivery port 22 and a refrigerating machine oil supply port 18 with this position as the upper limit. Therefore, performance reduction and an oil circulating quantity of the compressor 1 can be restrained within an allowable range.
| JP2002130128 | HORIZONTAL COMPRESSOR |
| WO/2019/161262 | PUMP |
| JPH04350387 | ROTARY COMPRESSOR |
KATO TARO
SUZUKI SATOSHI
IZAWA TAKESHI
SHIRAFUJI YOSHINORI
SEKIYA SHIN
SEGAWA KOJI
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