Title:
REFRIGERATING CYCLE AND HEAT PUMP WATER HEATER
Document Type and Number:
Japanese Patent JP2003336916
Kind Code:
A
Abstract:
To provide an environmentally-friendly heat pump water heater capa ble of assuring a high reliability by sufficiently holding oil film on a compressor sliding part and also capable of saving energy and providing a high efficiency in a heat pump water heater using carbon dioxide refrigerant (CO2).
In this heat pump water heater using carbon dioxide refrigerator, either one type of poly α-olefin or paraffin mineral oil or naphthene mineral oil or alkyl benzene which show the non-compatibility with the carbon dioxide refrigerant or a mixed oil is used as a refrigerator oil. Thus the wear of a compressor can be suppressed, a leak current can be reduced, and a performance can be increased.
Inventors:
OTA AKIRA
NAKAKAWAJI TAKAYUKI
ISHIYAMA AKIHIKO
IIZUKA TADASHI
NAKAKAWAJI TAKAYUKI
ISHIYAMA AKIHIKO
IIZUKA TADASHI
Application Number:
JP2002141150A
Publication Date:
November 28, 2003
Filing Date:
May 16, 2002
Export Citation:
Assignee:
HITACHI HOME & LIFE SOLUTIONS
International Classes:
F24H1/00; C09K5/04; C10M101/02; C10M105/06; C10M107/02; F04C23/00; F25B1/00; F25B39/02; C10N20/02; C10N40/30; F25B9/00; (IPC1-7): F25B1/00; C09K5/04; C10M101/02; C10M105/06; C10M107/02; F24H1/00; F25B39/02
Attorney, Agent or Firm:
Katsuo Ogawa (1 person outside)