AU782773B2 - Exhaust fan canopy apparatus - Google Patents
Exhaust fan canopy apparatus Download PDFInfo
- Publication number
- AU782773B2 AU782773B2 AU71724/00A AU7172400A AU782773B2 AU 782773 B2 AU782773 B2 AU 782773B2 AU 71724/00 A AU71724/00 A AU 71724/00A AU 7172400 A AU7172400 A AU 7172400A AU 782773 B2 AU782773 B2 AU 782773B2
- Authority
- AU
- Australia
- Prior art keywords
- flue
- exhaust
- canopy
- cowling
- fan
- 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.)
- Ceased
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- 239000007789 gas Substances 0.000 claims description 8
- 239000003517 fume Substances 0.000 claims description 7
- 238000001816 cooling Methods 0.000 claims description 5
- 239000004519 grease Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 5
- 239000000356 contaminant Substances 0.000 claims description 4
- 206010022000 influenza Diseases 0.000 claims description 4
- 230000004048 modification Effects 0.000 claims description 4
- 238000012986 modification Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 claims description 3
- 239000003925 fat Substances 0.000 claims description 3
- 231100000719 pollutant Toxicity 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 claims description 2
- 239000008162 cooking oil Substances 0.000 claims description 2
- 230000007797 corrosion Effects 0.000 claims description 2
- 238000005260 corrosion Methods 0.000 claims description 2
- 238000007599 discharging Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 239000000843 powder Substances 0.000 claims description 2
- 239000010959 steel Substances 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims 1
- 239000010935 stainless steel Substances 0.000 claims 1
- 239000000463 material Substances 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
- Ventilation (AREA)
Description
'ai
I
This invention relates to fixed components of exhaust fan canopy apparatus and involves a further improvement in and/or modification of the main invention disclosed and claimed in our standard patent No. 698736 granted 18th February, 1999 from application No. 61873/96 lodged 8th August, 1996.
The present specification incorporates the subject matter disclosed illustrated and claimed in our patent No. 698736 by cross reference.
Apparatus of the main invention disclosed illustrated and claimed in the specification of our patent 698736 is vertical-discharge, exhaust canopy fan apparatus for upwardly discharging a stream of hot gases and fumes from the canopy which has an outer housing and an inner housing, the outer housing forms a flue extension, the inner housing forms a cowling for an electric motor of a motor exhaust/fan unit for forced exhausting of the stream of hot gases and fumes from an opening at the top of the cowling; the bottom or lower part of the cowling interior being sealed against entry of hot exhaust gases and fumes exiting the flue and flowing into the flue extension and being directly connected to motor-cooling air inlet ducts entering through holes in an inclined base plate forming the bottom of the outer housing flue extension into ducts extending between the flue extension and the cowling, cooling air external to the flue being drawn into the cowling via the ducts and onto the motor and through the cowling and being discharged through an opening at the top of the cowling by low pressure created by the flow of hot gases discharged S°through a gap in the top of the flue extension.
A probierii witi this type of apparatus used mialn -y fo -r a.ov.
commercial kitchens, is that when the fan in inoperative, rain water contaminated by accumulated grease, oils and the like washed by rain out from the cowling or down from the flue falls onto a roof of a building below the canopy, flows into the guttering then through a spout down into downpipes and, if not intercepted and treated ends up in storm water drains, waste oulets to flow into and pollute streams, bays, lakes and the like. A similar situation applies to other waste contaminants which are washed down from exhaust systems by rain to thereby pollute the environment, for example from factories, paint shops and automotive repair shops whenever the exhaust canopy fan is inoperative.
Collection and separation and other treatment is required prior to release of the rain water run off into drains and the like.
It is an object of this invention or improvement in and/or modification of the invention of parent patent 698736 to prevent or at least alleviate the problem of contaminated rain water caused by rain washing down fats, oils and grease pollutants or contaminants from kitchen exhaust fan canopy apparatus onto a roof of a building and into storm water systems when the exhaust canopy fan is inoperative.
The improvement in and/or modification of the main invention of patent 698736 comprises the provision of a collector device for contaminated run off rain water, the device is adapted to be fitted or is already fitted) go.leO externally to and around a flue of a vertical-discharge exhaust canopy fan i" "apparatus and above a roof line to intercept the flow of rain water containing the pollutants or contaminants when they are washed down during such times as when the exhaust canopy fan of the apparatus is inoperative.
More particularly, the device is preferably in the form of a frustro- S•conical collar serving as a collection tray for rain water and entrained waste such as fat, grease or cooking oils, the tray is adapied to be fitted around or formed as part of the flue exterior of an exhaust canopy fan and is provided S•with a water-draining outlet in a lower part or bottom of a wall, a spout being below the outlet for connection to a downpipe running to a separator.
A
3 For existing exhaust fan canopy installations with flues above roof lines, the collector device of the present form of the invention may be manufactured, sold and installed as a separate integer namely a split-segment device of two separate (but non-identical) half components which are generally semi-annular when viewed in plan, may then be fitted around the exterior of a flue extension of exhaust fan canopy apparatus and joined on site during installation.
Alternatively, the whole assembly can be factory made to incorporate a one-piece contaminated rain water collector device according to the invention already joined to the flue or flue extension as part of an integral unit.
If desired, the water run off material collected by the tray device of the present invention and the down pipe attached to it may be intercepted by separator means in form of a grease trap such as that described in our co-pending complete patent application No. 18444/99 lodged 25th February, 1999 also for a patent of addition to our same parent patent 698,736.
o o.A non-limiting example of an embodiment or practical arrangement of the contaminated rain water collector device of the present invention will now be described with reference to the accompanying drawings in which: Figure 1 is a diagrammatic vertical sectional assembly view of the collector device of the present invention installed around the exterior of the flue of above-roof vertical discharge, exhaust fan canopy apparatus of patent S"698736.
Figure 2 is a pian view of fhe contaiinated -ail Iwater cl CL of Figure 1.
Referring to the drawings, the device of the present invention is applicable to the above-roof flue of exhaust fan canopy apparatus when the fan 4 motor and fan unit are inoperative usually when switched off with atmosphericcontaminating equipment shut down and in this example the fan motor, fan and linkage or coupling assembly remain the same in both the main or original invention and in that of the present updated version of the vertical-discharge exhaust fan canopy apparatus so that separate drawings of these as in Figure 3 of patent 698736 are unnecessary and have been omitted for clarity especially since the device of the present invention relates to a fixed component and not to a moving mechanical or electro-mechanical component. Figure 1 of patent 698736 has generally been retained but in an altered version which includes the collector device for contaminated rain water which is shown separately in Figure 2 of the drawings of the present specification and as an integral part of the assembly of the whole apparatus as shown in Figure 1. Referring to Figure 1 of the present specification, the relevant parts of the fully assembled exhaust fan canopy apparatus comprise; hot air and fumes exhaust flue 10 having an external surface which is preferably of cylindrical shape, flue extension 11, and inclined base plate 11 a forming the bottom or base plate of the outer housing of the flue extension 11 of the emodiment of the invention in patent 698736, motor cowling 12, cowling side wall 12a, cowling roof 21 and fan motor cooling ducts 19b, 20b. The gap between the base plate 11 a and flue 10 has been labelled 1 lb in the present specification. The new integer of the contaminated rain water collector device is labelled 26 in the total assembly view of Figure 2 and is preferably in the °oooo form of a frustro-conical tray-like collar made of any suitable material such as corrosion-resistant sheet metai for exampie siairiiess seel l or coirrosionprotected sheet metal for example powder-coated painted steel and may be installed around already-installed flues or can be made in two split segments the two halves of which are semi-annular when viewed in plan and, referring again to Figure 2 of the drawings of the present specification, are labelled 26a and 26b. For existing installations, the two segments of the tray may be overlapped at the diametrical join line in a lapped joint. The contaminated rain water collector device 26 has a contaminated water run off collection spout 27 at one side near the bottom. The device preferably also has a folded-over lower lip or flanged edge 28 and an upper lip or flanged edge 29. In the illustrated embodiment, the assembled or one-piece contaminated rain water collector device preferably has a circular central opening 30 defined by a circular edge for fitment around the exterior of the cylindrical flue It will be appreciated that althugh the contaminated rain water collector device 26 has been described and illustrated as having a circular central opening with circular surrounding edges for fitment around the exterior of a cylindrical flue, the opening could have straight edges defining a rectangular central opening to fit around the exterior of a rectangular flue but the collector device could be of any suitable geometry according to flues of different shape.
S o *i S SS.
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Claims (17)
1. In vertical-discharge, exhaust canopy fan apparatus for upwardly discharging a stream of hot gases and fumes from the canopy which has an outer housing and an inner housing, the outer housing forms a flue extension, the inner housing forms a cowling for an electric motor of a motor exhaust/fan unit for forced exhausting of the stream of hot gases and fumes from an opening at the top of the cowling; the bottom or lower part of the cowling interior being sealed against entry of hot exhaust gases and fumes exiting the flue ancflowing into the flue extension and being directly connected to motor-cooling air inlet ducts entering through holes in an inclined base plate oooS forming the bottom of the outer housing flue extension into ducts extending between the flue extension ard the cowling, cooling air external to the flue S•being drawn into the cowling via the ducts and onto the motor and through the cowling and being discharged through an opening at the top of the cowling by low pressure created by the flow of hot gases discharged through a gap in the top of the flue extension, the improvement in and/or modification of the S vertical-discharge, exhaust canopy fan apparatus comprises a collector device :°°for contaminated run off rain water, the device being adapted to be fitted externally to and around a flue or is incorporated with the flue of the'said apparatus and above a roof line to intercept the flow of rain water containing e pollutants or contaminants when they are washed down during such times as when the exhaust canopy fan of the apparatus is inoperative.
2. The device according to claim 1 which is a collection tray for rain water and entrained waste such as fat, grease or cooking oils and is adapted to be fitted around or formed as part of the flue exterior of exhaust canopy fan apparatus.
3. The device according to claim 1 or 2 which is provided with a water-draining outlet in a lower part or bottom of a wall.
4 The device according to claim 3 wherein a spout is provided below the outlet for connection to a downpipe running to a separator.
The device according to any preceding claim which has a lower lip or flanged edge and an upper lip or flanged edge.
6. The device according to claim 5 which also has a folded-over lower lip or flanged edge.
7. The device according to any preceding claim and which is in the formrof a'frustro-conical collar serving as a collection tray
8. The device according to claim 7 wherein the collar is made of corrosion-resistant or corrosion-protected sheet metal.
9. The device according to claim 7 or 8 wherein the collar is made of stainless steel.
The device according to any one of claims 7 to 9 wherein the collar is made of powder-coated painted steel. i
11. The device according to any preceding claim wherein for existing exhaust fan canopy installations with flues above roof lines, the collector device may be manufactured, sold and installed as a separate integer namely a split-segment device of two separate) half components may then be fitted around the exterior of a flue extension of exhaust fan canopy apparatus and joined on site during installation.
12. The device according to claim 11 wherein the split segments are non-identicaL.
13. The device according to claim 11 wherein the half components are generally semi-annular when viewed in plan,
14. The device according to any one of claimsl 1 to 13 wherein the two segments of the tray may be overlapped at the diametrical join line in a 8 lapped joint.
The device according to any one of claims 1 to 14 wherein each segment of the tray has an internal edge configured, when inside edges of the segments are overlapped and joined, to abut and fit around the external surface of a flue of vertical discharge, exhaust canopy fan apparatus.
16. The device according to any preceding claim in a one piece, factory made assembly with vertical, discharge, exhaust canopy fan apparatus.
17. A collector device for contaminated run off rain water and for use with the vertical-discharge, exhaust canopy fan apparatus S substantiilly as hereinbefore described with reference to the drawings. Dated this 10th day of December, 2004 Commercial Food Machinery (Vic) Pty.Ltd. By Our Patent Attorney JOHN L.DAVIES CO. O* *ooo
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU71724/00A AU782773B2 (en) | 1996-08-08 | 2000-11-22 | Exhaust fan canopy apparatus |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU61973/96A AU698736B2 (en) | 1995-09-18 | 1996-08-08 | Vertical discharge exhaust canopy fan apparatus |
| AU71724/00A AU782773B2 (en) | 1996-08-08 | 2000-11-22 | Exhaust fan canopy apparatus |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU61973/96A Addition AU698736B2 (en) | 1995-09-18 | 1996-08-08 | Vertical discharge exhaust canopy fan apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| AU7172400A AU7172400A (en) | 2002-05-23 |
| AU782773B2 true AU782773B2 (en) | 2005-08-25 |
Family
ID=34912911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU71724/00A Ceased AU782773B2 (en) | 1996-08-08 | 2000-11-22 | Exhaust fan canopy apparatus |
Country Status (1)
| Country | Link |
|---|---|
| AU (1) | AU782773B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN118654033B (en) * | 2024-06-25 | 2026-02-06 | 宁波方太厨具有限公司 | Volute, centrifugal fan and range hood |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4635617A (en) * | 1985-05-01 | 1987-01-13 | Simonsen Kenard A | Grease catch basin with solvent reservoir for use with cooking exhaust systems |
| US4869236A (en) * | 1988-05-20 | 1989-09-26 | Blough John W | Apparatus for collecting and storing grease discharged from roof mounted exhaust systems |
| US4887588A (en) * | 1988-12-27 | 1989-12-19 | Terry Rial | Grease absorption box for roof use |
-
2000
- 2000-11-22 AU AU71724/00A patent/AU782773B2/en not_active Ceased
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4635617A (en) * | 1985-05-01 | 1987-01-13 | Simonsen Kenard A | Grease catch basin with solvent reservoir for use with cooking exhaust systems |
| US4869236A (en) * | 1988-05-20 | 1989-09-26 | Blough John W | Apparatus for collecting and storing grease discharged from roof mounted exhaust systems |
| US4887588A (en) * | 1988-12-27 | 1989-12-19 | Terry Rial | Grease absorption box for roof use |
Also Published As
| Publication number | Publication date |
|---|---|
| AU7172400A (en) | 2002-05-23 |
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