To prevent a heat source machine from frequently repeating start/stop.
A stage increase basic condition in which a basic condition when stages of heat source machines are increased is defined by a relationship between a refrigeration load and a demand refrigeration load of the heat source machine and a stage decrease basic condition in which a basic condition when the stages of the heat source machine is decreased is defined by a relationship between the refrigeration load and the demand refrigeration load of the heat source machine are prestored into a storage part 22. When the number of the heat source machines is controlled, and when the present operation condition satisfies the stage increase basic condition, it is determined whether the stage decrease basic condition is satisfied or not when one machine is added to the present number of the machines. When it is determined that the stage decrease basic condition is not satisfied, one heat source machine is started. When the present operation condition satisfies the stage decrease basic condition, it is determined whether the stage increase basic condition is satisfied, when one machine in the present operation machines is reduced, and when the stage increase basic condition is not satisfied, one heat source machines is stopped.
MATSUO MINORU
NIKAIDO SATOSHI
OUCHI TOSHIAKI
| JP2011021855A | 2011-02-03 | |||
| JP2000257938A | 2000-09-22 | |||
| JP2010175093A | 2010-08-12 |
Kunio Ueda
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