JPS5525719A - Protection device for in-room abnormal negative pressure - Google Patents

Protection device for in-room abnormal negative pressure

Info

Publication number
JPS5525719A
JPS5525719A JP9803578A JP9803578A JPS5525719A JP S5525719 A JPS5525719 A JP S5525719A JP 9803578 A JP9803578 A JP 9803578A JP 9803578 A JP9803578 A JP 9803578A JP S5525719 A JPS5525719 A JP S5525719A
Authority
JP
Japan
Prior art keywords
pressure
room
dynamic
pressure inside
negative pressure
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.)
Granted
Application number
JP9803578A
Other languages
Japanese (ja)
Other versions
JPS5823537B2 (en
Inventor
Masanobu Kuwata
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 Plant Technologies Ltd
Original Assignee
Hitachi Plant Technologies 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 Plant Technologies Ltd filed Critical Hitachi Plant Technologies Ltd
Priority to JP9803578A priority Critical patent/JPS5823537B2/en
Publication of JPS5525719A publication Critical patent/JPS5525719A/en
Publication of JPS5823537B2 publication Critical patent/JPS5823537B2/en
Expired legal-status Critical Current

Links

Landscapes

  • Central Air Conditioning (AREA)

Abstract

PURPOSE: To simplify an air conditioning equipment and to keep the negative pressure inside a room within a fixed range by fitting auto-operative movable vanes in an air feed duct system.
CONSTITUTION: When the pressure inside a ventilation room 1 has decreased below a predetermined negative pressure, the dynamic pressure inside an air feed duct 5 decreases, and the decrease in the dynamic pressure is transmitted through a dynamic-pressure introduction duct 23 and a dynamic-pressure blow-off port 24 to movable vanes 22, which are opened by high atmospheric pressure. The outside air is introduced through an outside-air introduction duct 21 into the air feed duct 5, to return the pressure inside the room 1 to a predetermined nagetive pressure. Because the vanes 22 are opened and closed by the balance between the dynamic pressure inside the duct 5 and the atmospheric pressure, the air conditioning equipment is simplified and the negative pressure inside the room is kept constant.
COPYRIGHT: (C)1980,JPO&Japio
JP9803578A 1978-08-10 1978-08-10 Indoor abnormal negative pressure prevention device Expired JPS5823537B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP9803578A JPS5823537B2 (en) 1978-08-10 1978-08-10 Indoor abnormal negative pressure prevention device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP9803578A JPS5823537B2 (en) 1978-08-10 1978-08-10 Indoor abnormal negative pressure prevention device

Publications (2)

Publication Number Publication Date
JPS5525719A true JPS5525719A (en) 1980-02-23
JPS5823537B2 JPS5823537B2 (en) 1983-05-16

Family

ID=14208781

Family Applications (1)

Application Number Title Priority Date Filing Date
JP9803578A Expired JPS5823537B2 (en) 1978-08-10 1978-08-10 Indoor abnormal negative pressure prevention device

Country Status (1)

Country Link
JP (1) JPS5823537B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235483A (en) * 1975-09-13 1977-03-18 Ikeda Denki Kk Discharge lamp lighting circuit
JPS5235482A (en) * 1975-09-13 1977-03-18 Ikeda Denki Kk Discharge lamp lighting circuit
JPS59161623A (en) * 1984-02-27 1984-09-12 Hitachi Ltd Airflow quantity control device for air duct
JP2010243439A (en) * 2009-04-09 2010-10-28 Daiichi Jitsugyo Viswill Co Ltd Visual inspection apparatus
JP2022034851A (en) * 2020-08-19 2022-03-04 株式会社日立プラントサービス Air exhaust/supply system and clean room system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5235483A (en) * 1975-09-13 1977-03-18 Ikeda Denki Kk Discharge lamp lighting circuit
JPS5235482A (en) * 1975-09-13 1977-03-18 Ikeda Denki Kk Discharge lamp lighting circuit
JPS5713120B2 (en) * 1975-09-13 1982-03-15
JPS5713119B2 (en) * 1975-09-13 1982-03-15
JPS59161623A (en) * 1984-02-27 1984-09-12 Hitachi Ltd Airflow quantity control device for air duct
JPS6360295B2 (en) * 1984-02-27 1988-11-24
JP2010243439A (en) * 2009-04-09 2010-10-28 Daiichi Jitsugyo Viswill Co Ltd Visual inspection apparatus
JP2022034851A (en) * 2020-08-19 2022-03-04 株式会社日立プラントサービス Air exhaust/supply system and clean room system

Also Published As

Publication number Publication date
JPS5823537B2 (en) 1983-05-16

Similar Documents

Publication Publication Date Title
JPS5525719A (en) Protection device for in-room abnormal negative pressure
ES464347A1 (en) Air distribution box
JPS5426055A (en) Air conditioning ventilation fan
JPS5718497A (en) Eddy flow fan
JPS5228152A (en) Controlling circuit for revolution of fan for air conditioning system
JPS55150443A (en) Ventilating method for tunnel
JPS547751A (en) Ventilating system for air conditioner
JPS5322300A (en) Air conditioner in airplane
JPS5279356A (en) Discharge pressure control system of air conditioner
JPS547750A (en) Control system for air conditioner
JPS53119201A (en) Pressure regulating method for exhaust gas of sintering
JPS5642038A (en) Air conditioning
JPS51147808A (en) Continuous conditioned air supplier for rolling stock
JPS5341097A (en) Air conditioning exhaust system
JPS541950A (en) Air conditioning and ventilating system
JPS5231417A (en) Movable air conditioner
JPS53148837A (en) Air conditioner
JPS52141041A (en) Air conditioning system
JPS55155129A (en) Air conditioning machine
JPS53148838A (en) Air conditioner
JPS5353145A (en) Air conditioner
JPS5316453A (en) Air conditioning system
JPS5640034A (en) Ventilating system for fumigating storehouse
JPS5246657A (en) Unit type system for controlling humidity
JPS5291546A (en) Exhausting apparatus for air conditioning