Fluid machine system and method for controlling same

Patent metadata

Field	Value
Publication number	US-12044232-B2
Application number	US-201917274700-A
Country	US
Kind code	B2
Filing date	Nov 29, 2019
Priority date	Dec 20, 2018
Publication date	Jul 23, 2024
Grant date	Jul 23, 2024

Abstract

There are provided an operation number control device and a method for controlling the same that can level the operation times of the fluid machines, which are connected to the operation number control device. A fluid machine system comprises a plurality of fluid machines, and an operation number control device capable of individually controlling start and stop of the fluid machines. The operation number control device sets a continuous operation time for each of the fluid machines based on total operation times of the fluid machine and other fluid machines. When among fluid machines in operation, there is a fluid machine for which the continuous operation time set for the fluid machine has elapsed and there is a fluid machine at stop, the operation number control device causes the fluid machine at stop to start and causes the fluid machine to stop.

First claim

The invention claimed is:

1. A fluid machine system comprising:
a plurality of fluid machines; and
an operation number control device capable of individually controlling start and stop of the fluid machines,
wherein the operation number control device determines an order of operation start of the fluid machines in ascending order of total operation time of each fluid machine,
sets a continuous operation time for each of the fluid machines based on total operation times of each of the fluid machines such that the continuous operation time of one of the plurality of fluid machines having a first total operation time is longer than the continuous operation time of another of the plurality of fluid machines having a second total operation time that is longer than the first total operation time,
starts the operation of each of the plurality of fluid machines until a preset value is reached in accordance with the determined order of operation start of each fluid machine; and
when there is a fluid machine for which the continuous operation time set for the fluid machine has elapsed among fluid machines in operation and there is a fluid machine at stop, the operation number control device causes the fluid machine at stop to start and causes the fluid machine for which the continuous operation time has elapsed to stop.

2. The fluid machine system according to claim 1 ,
wherein in setting the continuous operation time of each of the fluid machines, the operation number control device sets the continuous operation time of each of the fluid machines before a fluid machine having a longest total operation time reaches a maintenance time.

3. The fluid machine system according to claim 1 ,
wherein when the fluid machine system starts, the operation number control device causes a fluid machine having a longest continuous operation time to start first.

4. A method for controlling a fluid machine system including a plurality of fluid machines and an operation number control device capable of individually controlling start and stop of the fluid machines, the method comprising:
the operation number control device determining an order of operation start of the fluid machines in ascending order of total operation time of each fluid machine,
setting a continuous operation time for each of a plurality of fluid machines based on total operation times of each of the fluid machines such that the continuous operation time of a fluid machine having a first total operation time is longer than the continuous operation time of a fluid machine having a second total operation time that is longer than the first total operation time,
starting the operation of each of the fluid machines until a preset value is reached in accordance with the determined order of operation start of the fluid machine; and
when there is a fluid machine for which the continuous operation time set for the fluid machine has elapsed among fluid machines in operation and there is a fluid machine at stop, causing a fluid machine at stop to start and causing the fluid machine for which the continuous operation time has elapsed to stop.

5. The method for controlling a fluid machine system according to claim 4 ,
wherein in setting the continuous operation time of each of the fluid machines, the continuous operation time of each of the fluid machines is set before a fluid machine having a longest total operation time reaches a maintenance time.

6. The method for controlling a fluid machine system according to claim 4 ,
wherein when the fluid machine system starts, a fluid machine having a longest continuous operation time is started first.

Assignees

• Hitachi Industry Equipment Systems Co Ltd

Inventors

• Aoyagi Norio
• Saito Hiroaki
• Kato Fuminori
• Oka Daichi
• Yamamoto Akihiro

Classifications

• F25B2500/26

  characterised by the startup of the refrigeration cycle · CPC title

• F25B5/02

  arranged in parallel · CPC title

• F25B49/022

  Compressor control arrangements · CPC title

• F04D15/0066

  by changing the speed, e.g. of the driving engine · CPC title

• F04D15/0088

  Testing machines · CPC title