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JPS57129292A - Pump apparatus - Google Patents

Pump apparatus

Info

Publication number
JPS57129292A
JPS57129292A JP1413781A JP1413781A JPS57129292A JP S57129292 A JPS57129292 A JP S57129292A JP 1413781 A JP1413781 A JP 1413781A JP 1413781 A JP1413781 A JP 1413781A JP S57129292 A JPS57129292 A JP S57129292A
Authority
JP
Japan
Prior art keywords
water
level
pump
switches
responsive switch
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
JP1413781A
Other languages
Japanese (ja)
Inventor
Yukimi Yamada
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP1413781A priority Critical patent/JPS57129292A/en
Publication of JPS57129292A publication Critical patent/JPS57129292A/en
Pending legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)

Abstract

PURPOSE:To enable to control the water level in a stable manner, by providing two water-level responsive switches in a high and a low stages, and keeping a water head by driving a pump through operation of the two switches. CONSTITUTION:A water-level responsive switch menas shown in the drawing comprises a first water-level responsive switch 7 in addition to a second water- level responsive switch 10. These two switches 7, 10 are disposed with a level difference to have a water head (H2-H1) corresponding to a capacity 60% or more of the content of a water drawing hose 25. Therefore, if air is drawn into the pump, the level of water in a water storage tnak 2 does not lower to the level H1 where the first water-level responsive switch 7 is set into operation, and the switch 7 continues to operate for operating a pump 13 continuously, so that the water level can be controlled in a stable manner.
JP1413781A 1981-01-31 1981-01-31 Pump apparatus Pending JPS57129292A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1413781A JPS57129292A (en) 1981-01-31 1981-01-31 Pump apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1413781A JPS57129292A (en) 1981-01-31 1981-01-31 Pump apparatus

Publications (1)

Publication Number Publication Date
JPS57129292A true JPS57129292A (en) 1982-08-11

Family

ID=11852752

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1413781A Pending JPS57129292A (en) 1981-01-31 1981-01-31 Pump apparatus

Country Status (1)

Country Link
JP (1) JPS57129292A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552171A (en) * 2018-05-31 2019-12-10 日立环球生活方案株式会社 washing machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110552171A (en) * 2018-05-31 2019-12-10 日立环球生活方案株式会社 washing machine

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