CA2055126A1 - Apparatus for controlling the ventilation of laboratory fume hoods - Google Patents

Apparatus for controlling the ventilation of laboratory fume hoods

Info

Publication number
CA2055126A1
CA2055126A1 CA 2055126 CA2055126A CA2055126A1 CA 2055126 A1 CA2055126 A1 CA 2055126A1 CA 2055126 CA2055126 CA 2055126 CA 2055126 A CA2055126 A CA 2055126A CA 2055126 A1 CA2055126 A1 CA 2055126A1
Authority
CA
Canada
Prior art keywords
controlling
opening
flow
fume hood
air
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
CA 2055126
Other languages
French (fr)
Other versions
CA2055126C (en
Inventor
Osman Ahmed
Steven Arthur Bradley
Steven L. Fritsche
Steven D. Jacob
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.)
Siemens Industry Inc
Original Assignee
Landis and Gyr Powers Inc
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 Landis and Gyr Powers Inc filed Critical Landis and Gyr Powers Inc
Priority to CA 2055126 priority Critical patent/CA2055126C/en
Publication of CA2055126A1 publication Critical patent/CA2055126A1/en
Application granted granted Critical
Publication of CA2055126C publication Critical patent/CA2055126C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Landscapes

  • Ventilation (AREA)
  • Devices For Use In Laboratory Experiments (AREA)
  • Flow Control (AREA)

Abstract

Apparatus for controlling the air flow through a fume hood to maintain a predetermined average face velocity through an uncovered portion of an opening of a fume hood of the type which has at least one moveable sash door adapted to cover the opening as the fume hood sash door is moved. The apparatus detects the position of each moveable sash door and calculates the size of the uncovered portion of the opening, measures the actual flow of air through the exhaust duct, and varies the flow of air through the exhaust duct responsive to door position signals and the actual flow signal for controlling a flow modulating means to maintain the predetermined average face velocity through the uncovered portion of the opening.
CA 2055126 1991-11-07 1991-11-07 Apparatus for controlling the ventilation of laboratory fume hoods Expired - Fee Related CA2055126C (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA 2055126 CA2055126C (en) 1991-11-07 1991-11-07 Apparatus for controlling the ventilation of laboratory fume hoods

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CA 2055126 CA2055126C (en) 1991-11-07 1991-11-07 Apparatus for controlling the ventilation of laboratory fume hoods

Publications (2)

Publication Number Publication Date
CA2055126A1 true CA2055126A1 (en) 1993-05-08
CA2055126C CA2055126C (en) 1997-07-29

Family

ID=4148720

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2055126 Expired - Fee Related CA2055126C (en) 1991-11-07 1991-11-07 Apparatus for controlling the ventilation of laboratory fume hoods

Country Status (1)

Country Link
CA (1) CA2055126C (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138849A (en) * 2023-09-04 2023-12-01 中科美菱低温科技股份有限公司 Biological safety cabinet wind speed control method and biological safety cabinet

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN117138849A (en) * 2023-09-04 2023-12-01 中科美菱低温科技股份有限公司 Biological safety cabinet wind speed control method and biological safety cabinet

Also Published As

Publication number Publication date
CA2055126C (en) 1997-07-29

Similar Documents

Publication Publication Date Title
CA2120193A1 (en) Method and Apparatus for Controlling Fume Hood Face Velocity Using Variable By-Pass Resistance
NZ314157A (en) Determining speed of fume hood door movements in control of air flow though hood opening
CA2218473A1 (en) Hoistway door seal structure
CA2166094A1 (en) Fluid flow control damper assembly and method
EP0290106A3 (en) Sliding roof panel control apparatus
DK0612962T3 (en) Hood, especially for use in industrial kitchens
US5924920A (en) Fume hood having a bi-stable vortex
SE8404827L (en) DEVICE FOR OPENING AND CLOSING OF DOORS, CLOSES AND CAPS
CA2141356A1 (en) Fume hood with air foil member
FI872722A0 (en) FOERFARANDE OCH ANORDNING FOER REGLERING AV VOLYMSTROEMMEN I VENTILATIONSANLAEGGNINGAR.
EP0240977A3 (en) Ventilating device for an air exchange according to the needs
CA2055126A1 (en) Apparatus for controlling the ventilation of laboratory fume hoods
CA2031728A1 (en) Air conditioner with ventilating means
JPS61145235U (en)
DE4091373T (en)
CA2182107A1 (en) Fume hood with improved counterbalance system
MX9202354A (en) PROCEDURE AND DEVICE FOR GAS OR SMOKE ASPIRATION IN A METALLURGICAL CONTAINER AND ELECTRIC FURNACE PROVIDED WITH SUCH A SUCTION DEVICE.
AU7494391A (en) Method and apparatus for providing substantially constant air flow through the door opening of a fume cupboard
GB1227038A (en)
GB1216070A (en) Extraction hood apparatus
JPS61145236U (en)
SE8404442D0 (en) DEVICE FOR PRESSURE CONTROL IN VENTILATION SYSTEM WITH VARIOUS FLOW
DE3865774D1 (en) DEVICE FOR HEAT TREATMENT OF A TRACK.
GB1393991A (en) Ventilators
GB2279455A (en) Fume cupboard extraction system

Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed