JPS5621201A - Control unit for operation of plural sets of machine - Google Patents

Control unit for operation of plural sets of machine

Info

Publication number
JPS5621201A
JPS5621201A JP9502479A JP9502479A JPS5621201A JP S5621201 A JPS5621201 A JP S5621201A JP 9502479 A JP9502479 A JP 9502479A JP 9502479 A JP9502479 A JP 9502479A JP S5621201 A JPS5621201 A JP S5621201A
Authority
JP
Japan
Prior art keywords
compressor
circuit
machine
stopped
operations
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP9502479A
Other languages
Japanese (ja)
Inventor
Takashi Kato
Hiroshi Watanabe
Tadahiro Imaizumi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP9502479A priority Critical patent/JPS5621201A/en
Publication of JPS5621201A publication Critical patent/JPS5621201A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To make average the number of operations and operating time and to extend the life of all the machines, by storing the operating state of each machine and determining the order of running and stop of the next machine so that the number of operations can be equal.
CONSTITUTION: When all the sets are in operation, the reduction in the load capacity is detected with the low pressure switch 6a, this is fetched to the detection circuit 7 and converted into electric signal and input to the operating circuit 9, and at the same time, the timer circuit 10 is reset and newly started. The memory circuit 8 stores the order of start of operation of each compressor, this is read out to the operation circuit for operation and it is determined which compressor is stopped. This decision is made that when the load capacity is reduced, the compressor starting operation first among the compressors in operation is stopped. When the load is increased, the compressor stopped first is operated.
COPYRIGHT: (C)1981,JPO&Japio
JP9502479A 1979-07-27 1979-07-27 Control unit for operation of plural sets of machine Pending JPS5621201A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9502479A JPS5621201A (en) 1979-07-27 1979-07-27 Control unit for operation of plural sets of machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9502479A JPS5621201A (en) 1979-07-27 1979-07-27 Control unit for operation of plural sets of machine

Publications (1)

Publication Number Publication Date
JPS5621201A true JPS5621201A (en) 1981-02-27

Family

ID=14126496

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9502479A Pending JPS5621201A (en) 1979-07-27 1979-07-27 Control unit for operation of plural sets of machine

Country Status (1)

Country Link
JP (1) JPS5621201A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119003A (en) * 1982-01-07 1983-07-15 Nagano Keiki Seisakusho:Kk Controller for number of devices in operation
US4670348A (en) * 1984-01-09 1987-06-02 Nippon Petrochemicals Co., Ltd. Electrical appliance impregnated with a curable impregnant composition
JPS62231302A (en) * 1986-03-31 1987-10-09 Mitsubishi Heavy Ind Ltd Operation control device for power generation plant

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5475019A (en) * 1977-11-28 1979-06-15 Toshiba Corp Number of units controller for motor groups

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5475019A (en) * 1977-11-28 1979-06-15 Toshiba Corp Number of units controller for motor groups

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS58119003A (en) * 1982-01-07 1983-07-15 Nagano Keiki Seisakusho:Kk Controller for number of devices in operation
US4670348A (en) * 1984-01-09 1987-06-02 Nippon Petrochemicals Co., Ltd. Electrical appliance impregnated with a curable impregnant composition
JPS62231302A (en) * 1986-03-31 1987-10-09 Mitsubishi Heavy Ind Ltd Operation control device for power generation plant

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