GB2299376A - Flue gas extractor fan - Google Patents

Flue gas extractor fan Download PDF

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Publication number
GB2299376A
GB2299376A GB9505565A GB9505565A GB2299376A GB 2299376 A GB2299376 A GB 2299376A GB 9505565 A GB9505565 A GB 9505565A GB 9505565 A GB9505565 A GB 9505565A GB 2299376 A GB2299376 A GB 2299376A
Authority
GB
United Kingdom
Prior art keywords
flue gas
assembly
fan
extractor fan
gas extractor
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Withdrawn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
GB9505565A
Other versions
GB9505565D0 (en
Inventor
Clive Michael Perry
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to GB9505565A priority Critical patent/GB2299376A/en
Publication of GB9505565D0 publication Critical patent/GB9505565D0/en
Publication of GB2299376A publication Critical patent/GB2299376A/en
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
    • F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
    • F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Sampling And Sample Adjustment (AREA)

Abstract

The impeller 2 and its housing 1 are formed of thermoplastic. An electric motor drives a stainless steel impeller shaft 4. A gas sampling outlet 5 is moulded in the housing 1. A thermostat 6 on the boiler hood 8 shuts down the boiler in response to flue gas temperature.

Description

BOILER FLUE GAS EXTRACTOR FAN This invention relates to the design of a plastic scroll and impeller which together form a flue gas extractor fan for boilers with high efficiency.
As the efficiency of boilers is increased the temperature of the flue gas is reduced, consequently an extractor fan has to be used to ensure that the gas is effectively extracted.
These fans have to be capable of operating with gases that are highly corrosive and in the case of "condensing boilers" the presents of condensate.
According to the present invention advantage has been taken of the lower flue gas temperature of high efficiency boilers to design a Flue Gas Extractor Fan using thermo plastic that will withstand this highly corrosive environment The Fan housing or scroll Fig.l.l, is mounted on the Fue Hood Fig.l.8, and this hood is assembled to the boiler case Fig.l.7. The fan motor is mounted on the out side of the fan scroll with a stainless steel shaft Fig.l.4 driving the impeller. The motor is protected from the corrosive flue gasses by the negative pressure difference. The fan scroll is fitted with a flue gas sampling point Fig.l.5. As a safety measure, to protect the fan assembly, a thermostat Fig.1.6. is fitted to the flue hood. This will shut down the boiler should a fault cause the flue gas temperature to rise.

Claims (6)

1. The whole assembly will stand up to the hostile environment and flue gas temperature of high efficiency boilers.
2. The assembly is simple to produce.
3. The assembly is lighter in weight than conventional metal construction.
4. The assembly is quieter in operation that conventional metal fans
5. A flue gas sampling point is moulded into the fan housing or scroll.
6. A safety thermostat is attached to the flue hood to check the flue gas temperature and protect the Fan Assembly.
GB9505565A 1995-03-20 1995-03-20 Flue gas extractor fan Withdrawn GB2299376A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9505565A GB2299376A (en) 1995-03-20 1995-03-20 Flue gas extractor fan

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9505565A GB2299376A (en) 1995-03-20 1995-03-20 Flue gas extractor fan

Publications (2)

Publication Number Publication Date
GB9505565D0 GB9505565D0 (en) 1995-05-03
GB2299376A true GB2299376A (en) 1996-10-02

Family

ID=10771486

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9505565A Withdrawn GB2299376A (en) 1995-03-20 1995-03-20 Flue gas extractor fan

Country Status (1)

Country Link
GB (1) GB2299376A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347892A (en) * 1999-03-17 2000-09-20 Bg Intellectual Pty Ltd An electrofusion coupler with axial reinforcement

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566336A (en) * 1942-06-18 1944-12-22 Sulzer Ag Improvements in or relating to pumps of the rotary type
GB772710A (en) * 1954-08-11 1957-04-17 Amag Hilpert Pegnitzhuette Ag Plastic casing for centrifugal pumps
GB2176272A (en) * 1985-06-07 1986-12-17 White Bradford Corp Direct power vented water heater
US5158446A (en) * 1992-03-30 1992-10-27 Rheem Manufacturing Company Combination pressure and temperature limit control for a fuel-fired, forced draft heating appliance combustion product exhaust system
US5352099A (en) * 1992-12-14 1994-10-04 Ametek, Inc. Exhaust fan for water heater
GB2281611A (en) * 1993-09-07 1995-03-08 Dunbrik (Yorks) Ltd Building flue systems

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB566336A (en) * 1942-06-18 1944-12-22 Sulzer Ag Improvements in or relating to pumps of the rotary type
GB772710A (en) * 1954-08-11 1957-04-17 Amag Hilpert Pegnitzhuette Ag Plastic casing for centrifugal pumps
GB2176272A (en) * 1985-06-07 1986-12-17 White Bradford Corp Direct power vented water heater
US5158446A (en) * 1992-03-30 1992-10-27 Rheem Manufacturing Company Combination pressure and temperature limit control for a fuel-fired, forced draft heating appliance combustion product exhaust system
US5352099A (en) * 1992-12-14 1994-10-04 Ametek, Inc. Exhaust fan for water heater
GB2281611A (en) * 1993-09-07 1995-03-08 Dunbrik (Yorks) Ltd Building flue systems

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2347892A (en) * 1999-03-17 2000-09-20 Bg Intellectual Pty Ltd An electrofusion coupler with axial reinforcement
GB2347892B (en) * 1999-03-17 2003-04-09 Bg Intellectual Pty Ltd Joining of reinforced thermoplastic pipe (RTP) for high pressure transportation applications using an electrofusion coupler

Also Published As

Publication number Publication date
GB9505565D0 (en) 1995-05-03

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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)