GB2203828A - Controlling ventilator fans - Google Patents

Controlling ventilator fans Download PDF

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Publication number
GB2203828A
GB2203828A GB08708270A GB8708270A GB2203828A GB 2203828 A GB2203828 A GB 2203828A GB 08708270 A GB08708270 A GB 08708270A GB 8708270 A GB8708270 A GB 8708270A GB 2203828 A GB2203828 A GB 2203828A
Authority
GB
United Kingdom
Prior art keywords
circuit
cooker
bore
gas
float
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.)
Withdrawn
Application number
GB08708270A
Other versions
GB8708270D0 (en
Inventor
Leburn George Rose
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.)
British Gas PLC
Original Assignee
British Gas PLC
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 British Gas PLC filed Critical British Gas PLC
Priority to GB08708270A priority Critical patent/GB2203828A/en
Publication of GB8708270D0 publication Critical patent/GB8708270D0/en
Publication of GB2203828A publication Critical patent/GB2203828A/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2021—Arrangement or mounting of control or safety systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/0001—Control or safety arrangements for ventilation

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)

Abstract

A device for controlling the operation of an extractor fan serving in use to remove to atmosphere cooking smells and moisture resulting from the operation of a gas cooker, the device being adapted to control a circuit supplying current to the fan motor, the device, in use, closing the circuit when the gas flow rate to the cooker falls below that level. The device comprises a float valve, the polypropylene float 7 of which interrupts the light path between a sensor 8 and lamp 9. <IMAGE>

Description

Title: Device for controlling the operation of an extractor fan The present invention relates to a device for controlling the operation of an extractor fan serving, in use, to remove to atmosphere cooking smells and moisture resulting from the operation of a gas cooker.
According to the present invention we provide a device for controlling the operation of an extractor fan serving in use to remove to atmosphere cooking smells and moisture resulting from the operation of a gas cooker, the device being adapted to control a circuit supplying current to the fan motor, the device, in use, closing the circuit when the gas flow rate to the appliance exceeds a certain level and opening the circuit when the gas flow rate to the cooker falls below that level.
An embodiment of the invention will now be particularly described with reference to the drawing showing a side view in section of the device.
Referring to the drawing the device comprises a perspex block 1 which in use is arranged with its longer axis vertical.
A bore 2 extends vertically through the block 1 and is provided at its lowermost end with an internally threaded portion 3 for connection to a gas supply pipe (not shown).
The uppermost end of the bore 2 is also provided with an internally threaded portion 4 for connection to the cooker supply pipe (not shown). In use therefore the block 1 is located intermediate the main gas and cooker supply pipes with gas passing between these pipes by way of the bore 2.
An intermediate portion 5 of the bore 2 adjoins the bore portions 3 and 4 and tapers radially inwardly from the uppermost bore portion 4 to the lowermost bore portion 3, the diameter of the portion 5 exceeding that of the bore portions 4 at the uppermost end of the bore portion 5 but being less than that of the bore portion 3 at the lowermost end of the bore portion 5.
Located within the intermediate portion 5 of the bore 2 is an elongated polypropylene float 6 similar in concept of that used in rotameters.
The head 7 of the float 6 is so dimensioned that at rest with no or at any rate a low gas flow the float 6 assumes the position shown in outline. Otherwise the float will rise if gas is flowing through the bore to a position such as that shown in full line.
Located vertically just above the head 7 of the float 6 on opposite sides of the bore 2 are respectively a light emitter 8 and a light sensor 9. The light emitter 8 transmits a light beam across the bore 2, the presence of the beam being detected by the sensor 9. The emitter and sensor are linked to the electrical circuit of the extractor fan (not shown) in such a way that the circuit is closed when the beam is broken but otherwise the circuit is open.
The beam is broken when the float 6'rises sufficiently for its head 7 to be interposed between the emitter and the sensor as is shown in the drawing.
In use when the occupant turns on the cooker the float rises when the gas flow rate exceeds a certain level. When the head of the float breaks the light beam the extractor fan is switched on and remains on at all times whilst the beam is broken. Thus the extractor fan will be operating while gas is lit and combustion fumes and cooking smells and moisture are being produced.
The circuit may include a delay means serving to maintain the circuit closed for a preset period after the appliance has been turned off so that the fan runs for a period after the appliance has been turned off.
This will enable the extractor fan to remove all the residual smells remaining at the instant the appliance is turned off.

Claims (2)

1. A device for controlling the operation of an extractor fan serving in use to remove to atmosphere cooking smells and moisture resulting from the operation of a gas cooker, the device being adapted to control a circuit supplying current to the fan motor, the device, in use, closing the circuit when the gas flow rate to the cooker exceeds a certain level and opening the circuit when the gas flow rate to the cooker falls below that level.
2. A device substantially as hereinbefore described with reference to the drawings.
GB08708270A 1987-04-07 1987-04-07 Controlling ventilator fans Withdrawn GB2203828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08708270A GB2203828A (en) 1987-04-07 1987-04-07 Controlling ventilator fans

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB08708270A GB2203828A (en) 1987-04-07 1987-04-07 Controlling ventilator fans

Publications (2)

Publication Number Publication Date
GB8708270D0 GB8708270D0 (en) 1987-05-13
GB2203828A true GB2203828A (en) 1988-10-26

Family

ID=10615371

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08708270A Withdrawn GB2203828A (en) 1987-04-07 1987-04-07 Controlling ventilator fans

Country Status (1)

Country Link
GB (1) GB2203828A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642784A (en) * 1996-02-16 1997-07-01 Sani Metal Ltd. Exhaust hood apparatus
GB2396209A (en) * 2002-12-10 2004-06-16 Phillip John West Fan controller

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB591169A (en) * 1945-04-30 1947-08-08 Raymond Walter King Improvements in means for extracting objectionable gases or vapours, contaminated air and the like from kitchens water closets or other compartments

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB591169A (en) * 1945-04-30 1947-08-08 Raymond Walter King Improvements in means for extracting objectionable gases or vapours, contaminated air and the like from kitchens water closets or other compartments

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5642784A (en) * 1996-02-16 1997-07-01 Sani Metal Ltd. Exhaust hood apparatus
GB2396209A (en) * 2002-12-10 2004-06-16 Phillip John West Fan controller
GB2396209B (en) * 2002-12-10 2007-01-03 Phillip John West Fan controller

Also Published As

Publication number Publication date
GB8708270D0 (en) 1987-05-13

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)