Turbo chiller, compressor therefor, and control method therefor

Details Turbo chiller, compressor therefor, and control method therefor Turbo chiller, compressor therefor, and control method therefor

2004-12-14

2008-08-19

Tyler, Cheryl J. (Department: 3744)

Refrigeration

Automatic control

Refrigeration producer

C062S201000, C062S209000, C417S022000, C417S042000

Reexamination Certificate

active

07412841

ABSTRACT:
A compressor for a turbo chiller that can stably and efficiently operate in various operating states is provided. An aerodynamic feature map showing a rotating stall line at which rotating stall occurs is provided on a map represented by a flow parameter reflecting the volume flow based on the output thermal capacity of the chiller and by a pressure parameter reflecting the head based on the evaporator pressure and the condenser pressure. A minimum rotation speed obtaining unit obtains a minimum rotation speed from the pressure parameter and the rotating stall line on the aerodynamic feature map in the current operating state, and a rotation speed greater than or equal to the minimum rotation speed thus obtained is designated to the inverter.

REFERENCES:
patent: 4546618 (1985-10-01), Kountz et al.
patent: 5355691 (1994-10-01), Sullivan et al.
patent: 5798941 (1998-08-01), McLeister
patent: 5873257 (1999-02-01), Peterson
patent: 5908462 (1999-06-01), Batson
patent: 1-200095 (1989-08-01), None

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