LIQUID REFRIGERANT PUMP AND ICE HEAT ACCUMULATING AIR- CONDITIONING SYSTEM HAVING THIS PUMP

摘要

PROBLEM TO BE SOLVED: To realize a hermetic and highly reliable liquid refrigerant pump as well as to provide an ice heat accumulating air-conditioning system capable of efficiently utilizing the liquid refrigerant pump. SOLUTION: A motor part 12 and a pump part 11 are isolated in pressure. The pump part 12 has at least two communicating passages 21, 25 for communicating with an external part by penetrating through a chamber wall surface. The respective communicating passages 21, 25 have a self-cooling passage 31 acting as an inlet or an outlet of a liquid refrigerant and reaching the motor part 11 by branching off from a midway part of a liquid refrigerant passage reaching the outlet from the inlet. The self-cooling passage 31 is constituted so as to include an orifice and a passage for repeating an ascent-descent in order from a branch part. The motor part 12 has a communicating passage 28 for communicating with the external part by penetrating through the chamber wall surface.