JPS56147645A - Air cleaner - Google Patents

Air cleaner

Info

Publication number
JPS56147645A
JPS56147645A JP5074680A JP5074680A JPS56147645A JP S56147645 A JPS56147645 A JP S56147645A JP 5074680 A JP5074680 A JP 5074680A JP 5074680 A JP5074680 A JP 5074680A JP S56147645 A JPS56147645 A JP S56147645A
Authority
JP
Japan
Prior art keywords
air
air cleaner
change
corona discharge
cleanliness
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
JP5074680A
Other languages
Japanese (ja)
Inventor
Keizo Otsuka
Masaichi Kawamoto
Shoichi Sawahata
Tsugita Yukitake
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 JP5074680A priority Critical patent/JPS56147645A/en
Publication of JPS56147645A publication Critical patent/JPS56147645A/en
Pending legal-status Critical Current

Links

Landscapes

  • Electrostatic Separation (AREA)

Abstract

PURPOSE: To obtain an air cleaner of high sensitivity, a small size, light weight and a low cost by providing an air cleanliness sensor and an air cleanliness meter operated by the change in corona discharge current to the air cleaner.
CONSTITUTION: If air is allowed to flow while corona discharge is being caused by applying high voltage, the discharge current across both electrodes changes with the change in the dust concn. in the air, and therefore the dust concn. is detected from the change in this current. Thereupon, an air cleanliness sensor 28 and an air cleanliness meter 48 are provided to the air cleaner. In this way, the contamination of the air is accurately and easily measured with the corona discharge type sensor of a small size and light weight, and the air cleaner is operated.
COPYRIGHT: (C)1981,JPO&Japio
JP5074680A 1980-04-15 1980-04-15 Air cleaner Pending JPS56147645A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5074680A JPS56147645A (en) 1980-04-15 1980-04-15 Air cleaner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5074680A JPS56147645A (en) 1980-04-15 1980-04-15 Air cleaner

Publications (1)

Publication Number Publication Date
JPS56147645A true JPS56147645A (en) 1981-11-16

Family

ID=12867396

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5074680A Pending JPS56147645A (en) 1980-04-15 1980-04-15 Air cleaner

Country Status (1)

Country Link
JP (1) JPS56147645A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0248420U (en) * 1988-09-29 1990-04-04

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0248420U (en) * 1988-09-29 1990-04-04

Similar Documents

Publication Publication Date Title
JPS5536874A (en) Detection method for toner remainder
JPS56147645A (en) Air cleaner
JPS5796248A (en) Detecting method for gas using superparticulate gas sensor
JPS5336268A (en) Level detecting circuit of liquid
JPS55155253A (en) Output compensation circuit for bridge type measuring apparatus
JPS5587035A (en) Automatic controller for grain moisture meter
JPS55122161A (en) Device for measuring velocity of wind
JPS55110961A (en) Capacity measuring apparatus
JPS56130243A (en) Air cleaner with air cleanliness meter
JPS55117955A (en) Semiconductor sensor and impurity detection method
JPS54109236A (en) Air pollution control apparatus
JPS5587913A (en) Gas flow rate measuring device
IT7927188A0 (en) ARRANGEMENT FOR THE CONTROL OF HIGH VOLTAGE DIRECT CURRENTS AND ALTERNATING CURRENTS BY MEANS OF POTENTIAL SEPARATION FAULT INDICATION.
JPS52143833A (en) Method and device for charging by corona discharge
JPS5368290A (en) Insulation resistance measuring apparatus of ground system
JPS5412840A (en) Measuring method for surface potential of electrophotographic photoreceptor by time series
JPS5752837A (en) Vacuum degree measuring instrument
JPS54147085A (en) Measuring apparatus for degree of vacuum
JPS57200814A (en) Detection amplifier
JPS5317357A (en) Analog display device
JPS57106804A (en) Measuring device for thickness of film
JPS5361299A (en) Photoelectric smoke detector
JPS5670245A (en) Double feed detection system
JPS5631629A (en) Moisture sensing sensor
JPS5234734A (en) Electrophotographic light sensitive plate