EP2349581A1 - Method and apparatus for maintaining a fluid supply - Google Patents
Method and apparatus for maintaining a fluid supplyInfo
- Publication number
- EP2349581A1 EP2349581A1 EP09798213A EP09798213A EP2349581A1 EP 2349581 A1 EP2349581 A1 EP 2349581A1 EP 09798213 A EP09798213 A EP 09798213A EP 09798213 A EP09798213 A EP 09798213A EP 2349581 A1 EP2349581 A1 EP 2349581A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spray
- pipe
- cleaning
- self
- nozzle
- 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- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/14—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means with multiple outlet openings; with strainers in or outside the outlet opening
- B05B1/20—Arrangements of several outlets along elongated bodies, e.g. perforated pipes or troughs, e.g. spray booms; Outlet elements therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/02—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape
- B05B1/04—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to produce a jet, spray, or other discharge of particular shape or nature, e.g. in single drops, or having an outlet of particular shape in flat form, e.g. fan-like, sheet-like
- B05B1/046—Outlets formed, e.g. cut, in the circumference of tubular or spherical elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/52—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles
- B05B15/531—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter for removal of clogging particles using backflow
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B15/00—Details of spraying plant or spraying apparatus not otherwise provided for; Accessories
- B05B15/50—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter
- B05B15/55—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids
- B05B15/555—Arrangements for cleaning; Arrangements for preventing deposits, drying-out or blockage; Arrangements for detecting improper discharge caused by the presence of foreign matter using cleaning fluids discharged by cleaning nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2221/00—Applications of separation devices
- B01D2221/02—Small separation devices for domestic application, e.g. for canteens, industrial kitchen, washing machines
Definitions
- This invention relates to an apparatus for maintaining a fluid supply and a method for maintaining the apparatus and refers particularly, though not exclusively to a spray method and apparatus system that requires reduced maintenance for extracting contaminants from a spray system.
- Spray systems require regular maintenance to keep the systems in efficient working order.
- the spray system may comprise a plurality of fluid outlets. Deposits can accumulate in one or more the plurality of fluid outlets preventing correct operation.
- the fluid spray is used to extract contaminants such as, for example, grease and food particles from the exhaust flow. It is important that deposits of contaminants are removed from the fluid outlets to maintain a consistent spray.
- a self-cleaning spray system comprising a spray pipe having at least one nozzle in a wall of the spray pipe such that, during a spray operation, fluid is sprayed in a spray in a spray plane from the at least one nozzle; a cleaning pipe spaced from the spray pipe and having at least one outlet to direct fluid towards the at least one nozzle and into the spray pipe for cleaning the at least one nozzle during a reverse flush operation, the at least one outlet being spaced from the spray plane.
- the cleaning pipe may be parallel to the spray pipe.
- the at least one outlet may be configured to direct a jet of fluid directly at the at least one nozzle.
- the at least one outlet may be laterally and angularly spaced from the spray plane. The angular spacing may be less than an included angle of the spray.
- the cleaning pipe may include at least one tube branching from the cleaning pipe.
- the at least one tube may terminate at the at least one outlet.
- the at least one tube may be attached to the spray tube proximate the at least one nozzle.
- the system may further comprise at least one pump, a plurality of valves and a controller to energise the pump and open and close the valves to change between the spray operation and the reverse flush operation.
- the at least one nozzle may be an aperture through the wall of the spray pipe.
- a method for maintaining a fluid supply by removing contaminants from a spray system comprising in a spray operation, directing fluid from at least one nozzle in a spray pipe, in a spray that is in a spray plane; and in a reverse flushing operation, directing fluid from at least one outlet of a cleaning pipe at the at least one nozzle to clear contaminants therefrom, the at least one outlet being spaced from the spray plane.
- the reverse flushing operation may further comprise applying a negative pressure in the spray pipe and a positive pressure in the cleaning pipe.
- a jet of fluid may be directed at the at least one nozzle.
- the at least one outlet may be laterally and angularly spaced from the spray plane. The angular spacing may be less than an included angle of the spray.
- At least one pump and a plurality of valves may be provided.
- a controller may be used to energise the pump and open and close the valves to change between the spray operation and the reverse flush operation.
- the at least one nozzle may be an aperture through the wall of the spray pipe.
- the self- cleaning spray system may be part of a self-cleaning kitchen exhaust system.
- Figure 1 is a perspective view of a fluid supply apparatus according to the earlier application;
- Figure 2 is a top view of the apparatus of Figure 1 ;
- Figure 3 is a vertical cross section view along the lines and in the direction of arrows
- Figure 4 is a side view of a kitchen exhaust system according to an exemplary embodiment
- Figure 5 is a schematic view of the kitchen exhaust system in Figure 4;
- Figure 6 is a cross section view along the lines and in the direction of arrows B-B in
- Figure 7 is (a) a schematic perspective view and (b) a vertical cross-sectional view of another exemplary embodiment
- Figure 8 is (a) a schematic perspective view and (b) a vertical cross-sectional view of a further exemplary embodiment
- Figure 9 is (a) a schematic perspective view and (b) a vertical cross-sectional view of yet another exemplary embodiment.
- Figure 10 is (a) a schematic perspective view and (b) a vertical cross-sectional view of a final exemplary embodiment.
- FIG. 1 to 3 show an apparatus 100 for supplying a fluid in an enclosure according to the earlier application.
- the fluid may be, for example, a fluid that is in normal circumstances considered as being an incompressible fluid.
- the apparatus 100 comprises a pipe 110 having a plurality of nozzles 112 that as shown are in the form of apertures 112 through a wall 113 of the pipe 110.
- nozzles 112 are in the form of apertures 112 through a wall 113 of the pipe 110.
- Each of the plurality of apertures 112 has a first portion 114 extending from an inner surface 115 of the wall 113, and a second portion 116 extending from the outer surface 117 of the wall 113, the first portion 114 and the second portion 116 intersecting to form an opening 118.
- the pipe 110 may be of a shape selected from a group consisting of: polygon, ellipse and circle.
- Each of the plurality apertures 112 may be equidistantly spaced to provide an even distribution of fluid.
- the opening 118 will be somewhat rectangular and will thus have a spray 125 that is fan shaped, generally in a longitudinally oriented spray plane 132.
- FIGS. 4 to 6 illustrate the exemplary embodiment in operation.
- the pipe 110 with the plurality of apertures 112 formed as described above is integrated into, for example, a self-cleaning kitchen exhaust system 140. It may be incorporated in any other spray system such as, for example, agricultural sprays, road sprays, irrigation sprays, spray cooling systems, and so forth.
- the pipe 110 is at the top of an enclosure 146 and during spray operation directs the fluid spray 125 of a fan shape in a spray plane 132 between a set of baffles 148 and a filter module 156 towards a fluid tray 162.
- the kitchen exhaust flow is drawn through inlet 142 and flows through the baffles 148.
- the baffles 148 include three overlapping louvers 150,152,154 which prevent any of the spray from leaking.
- the kitchen exhaust flow then flows horizontally though the spray plane 132.
- the kitchen exhaust flow then flows horizontally though the replaceable filter cartridge 158 in filter module 156 and out outlet 144.
- the flow rate of kitchen exhaust flow may be controlled by a fan (not shown) integrated with the outlet 144.
- a cleaning pipe 170 of any suitable size, shape and form has a plurality of outlets 172 that are directed at the apertures 112 but which are spaced laterally and angularly from the fluid spray 125 and spray plane 132 so as not to interfere with the fluid spray 125 during spray operation.
- the lateral spacing of outlets 172 prevents the interference with the fluid spray 125 during spray operation.
- the angular spacing of outlets 172 enables the outlets 172 to be directed at the apertures 112.
- the angular spacing is less than half the spray angle 126, being the included angle of the spray 125. If any of the apertures 112 become blocked they will be blocked from within pipe 110 due to contaminants from within pipe 110. Therefore, there is a reverse flush operation that supplies fluid through pipe 170 into outlets 172.
- the outlets 172 are directed at apertures 112 and supply a jet 174 of cleaning solution directly at the apertures 112.
- the jet 174 of cleaning solution therefore intersects the spray plane 132 at the apertures 112.
- the jet 174 of cleaning solution is forced through the apertures 112 to clear any blockage due to the pressure of jet 174. This may be assisted by having a positive pressure in pipe 120 and a negative pressure in pipe 110.
- the negative pressure in pipe 110 may assist by drawing the jet 174 through apertures 112, as well as providing a suction pressure (negative pressure) on any obstruction in an aperture 112.
- the fluid flow through pipe 110 and pipe 170 is controlled by a controller (not shown), which energises a series of values and at least one pump 176; in either the spray operation or the reverse flush operation.
- the pipe 110 and/or pipe 170 may be connected to a pressurised water supply system such as, for example, the public water supply, in which case there may not be a pump 176.
- compressed air may be used to pressurise the fluid in pipes 110 and/or 170.
- the switch between spray operation and the reverse flush operation, or the initiation of the reverse flush operation from an off condition may be automatic based on sensors detecting a blockage, at scheduled times or may be manually initiated.
- valves MVl between the pump 176 and the pipe 110, and MV2, between a reservoir 180 and the pump 176, are open.
- the end of pipe 110 is blocked by valve SV3 which is closed to maintain the desired pressure in pipe 110.
- Pump 176 is operatingrFluid is drawn from the reservoir 180 by the pump 176 and supplied by pipe 110 through valves MV2 and MV 1.
- the return pipe 184 returns the waste fluid from the fluid tray 162 and returns it to the reservoir 180. If the fluid level in reservoir 180 becomes low, valve MV4 is opened to add fluid to reservoir from a fluid supply.
- valve MV5 is opened to drain all unwanted contaminants from reservoir 180 to a grease trap (not shown).
- Valve MV5 is then closed.
- Valve MV4 is then opened to supply fluid from fluid supply to the reservoir 180 to fill reservoir 180 to the required level.
- Valve SV3, between the pipe 110 and the reservoir 180, is then opened and pump 176 operated to clear pipe 110 by flushing. The pump 176 is then switched off and valve SV3 closed.
- valve MVl To clean any aperture 112 that may be blocked (completely or partially), valve MVl is closed. Valves SVl, between the pump 176 and the reverse flush pipe 170, and SV2, which may be connected between an optional Venturi opening in the valve MV2 and the pipe 110, are opened. By valve SVl being opened, fluid from reservoir 180 and/or directly from the fluid supply is supplied to pipe 170 to create jets 174 from each of the outlets 172. The pump 176 is switched on. Fluid jets 174 from outlets 172 pass through apertures 112 into pipe 110. As pipe 110 is connected to the Venturi opening in the valve MV2 the fluid flow through valve MV2 causes a negative .
- the negative pressure will also act directly on any contaminant in apertures 112 as a blockage. If required or desired, other forms of assistance may be used to generate the negative pressure. This may include, for example, a second pump (not shown). This may be in addition to or in place of the Venturi opening. As the first portion 114 is normally larger than the second portion 116, any blockage will most likely be at the opening 118 and will thus be easily drawn into the first portion 114 and thus into pipe 110, where it can be eliminated.
- Any contaminants in an aperture 112 will have a positive pressure applied to them by jet 174, on one side of the contaminant, and a negative pressure applied to them from pipe 110 on a side opposite the jet 174.
- the two pressures therefore compliment each other to dislodge the contaminant and draw it into pipe 110.
- the pipe 170 may include tubes 178 branching at an angle relative thereto such as, for example, a right angle, terminating in the openings 172.
- the tube 178 may be affixed to the pipe 110 to minimise any relative movement due to thermal expansion and contraction, fluid pressure changes, and the like.
- the tubes 178 may be somewhat hook shaped and be partially around pipe 110 with outlets 172 directed at apertures 112. Tubes 178 may be securely or releasably attached to pipe 110.
- the outlets 172 are formed directly through the wall of pipe 170 and are aimed to form the jet spray 174 directly at the apertures 112.
- the tubes 178 are relatively short, generally straight tubes extending outwardly from pipe 170 in a non-radial manner with outlets 172 directed at apertures 112.
- a bracket 179 is used to maintain pipes 110, 170 in the correct relationship so outlets 172 are always directed at apertures 112, and tubes 178, are spaced from the spray plane 132 both laterally and angularly.
- the tubes 178 pass through the wall of pipe 110 opposite apertures 112 with outlets 172 directed at apertures 112.
- valves SVl and SV2 are closed, values MVl and SV3 opened, and pump 176 switched on to flush the contaminants in the pipe 110 into the reservoir 180.
- a pressure sensor (not shown) may be placed in pipe 110 and connected to the controller.
- the pressure in pipe 110 may be used to determine whether there may be a blockage in one or more of the apertures 112 and/or whether a preventative, reverse flushing operation may be desirable.
- the controller may be programmed for automatic operation of the reverse flushing operation. This may be periodic such as, for example, daily, weekly, monthly, at the end of each operational cycle, and so forth.
- the embodiment of Figures 3 to 9 may also be used with conventional spray outlets.
- the cleaning pipe 170 may also be retrofitted to existing spray systems.
- the cleaning pipe 170 may be able to be can be moved to a suitable non-operating position when not required and may be able to be moved to the operating position described above when required.
- the jet would be provided only when in the operating position.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SG200805310-0A SG158760A1 (en) | 2008-07-14 | 2008-07-14 | Method and apparatus for maintaining a fluid supply |
PCT/SG2009/000252 WO2010008346A1 (en) | 2008-07-14 | 2009-07-14 | Method and apparatus for maintaining a fluid supply |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2349581A1 true EP2349581A1 (en) | 2011-08-03 |
EP2349581A4 EP2349581A4 (en) | 2013-03-13 |
Family
ID=41550569
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09798213A Withdrawn EP2349581A4 (en) | 2008-07-14 | 2009-07-14 | Method and apparatus for maintaining a fluid supply |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2349581A4 (en) |
AU (1) | AU2009271761A1 (en) |
SG (1) | SG158760A1 (en) |
TW (1) | TW201006553A (en) |
WO (1) | WO2010008346A1 (en) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2139750A (en) * | 1983-04-04 | 1984-11-14 | Chan Glenn & Partners | Cooker hoods |
EP0466943A1 (en) * | 1990-02-05 | 1992-01-22 | Vsesojuzny Nauchno-Issledovatelsky Instrumentalny Institut | Liquid pulverizer |
US5351886A (en) * | 1993-02-11 | 1994-10-04 | Bull Dan F | Self-cleaning shower nozzle system |
WO2006138448A2 (en) * | 2005-06-15 | 2006-12-28 | Spraying Systems Co. | Liquid adhesive dispensing system |
WO2007097714A1 (en) * | 2006-02-24 | 2007-08-30 | Kim Lui So | Method and apparatus for supplying a fluid |
EP1972442A1 (en) * | 2007-03-21 | 2008-09-24 | technotrans AG | Method and device for cleaning nozzles on a spray dampening unit |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3575185A (en) * | 1968-10-23 | 1971-04-20 | Gen Motors Corp | Self-cleaning dishwasher strainer |
US5874292A (en) * | 1996-07-11 | 1999-02-23 | Mcminn, Jr.; Pearson Vernie | System and method for vent hood cleaning and comprehensive bioremediation of kitchen grease |
DE19838864C2 (en) * | 1998-08-26 | 2001-12-13 | Rational Ag | Method for cleaning a cooking device and device used therefor |
US7614396B2 (en) * | 2002-08-16 | 2009-11-10 | Kim Lui So | Self-cleaning exhaust system and method |
-
2008
- 2008-07-14 SG SG200805310-0A patent/SG158760A1/en unknown
-
2009
- 2009-07-14 TW TW098123716A patent/TW201006553A/en unknown
- 2009-07-14 EP EP09798213A patent/EP2349581A4/en not_active Withdrawn
- 2009-07-14 WO PCT/SG2009/000252 patent/WO2010008346A1/en active Application Filing
- 2009-07-14 AU AU2009271761A patent/AU2009271761A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2139750A (en) * | 1983-04-04 | 1984-11-14 | Chan Glenn & Partners | Cooker hoods |
EP0466943A1 (en) * | 1990-02-05 | 1992-01-22 | Vsesojuzny Nauchno-Issledovatelsky Instrumentalny Institut | Liquid pulverizer |
US5351886A (en) * | 1993-02-11 | 1994-10-04 | Bull Dan F | Self-cleaning shower nozzle system |
WO2006138448A2 (en) * | 2005-06-15 | 2006-12-28 | Spraying Systems Co. | Liquid adhesive dispensing system |
WO2007097714A1 (en) * | 2006-02-24 | 2007-08-30 | Kim Lui So | Method and apparatus for supplying a fluid |
EP1972442A1 (en) * | 2007-03-21 | 2008-09-24 | technotrans AG | Method and device for cleaning nozzles on a spray dampening unit |
Non-Patent Citations (1)
Title |
---|
See also references of WO2010008346A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2010008346A1 (en) | 2010-01-21 |
SG158760A1 (en) | 2010-02-26 |
AU2009271761A1 (en) | 2011-09-01 |
EP2349581A4 (en) | 2013-03-13 |
TW201006553A (en) | 2010-02-16 |
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Legal Events
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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17P | Request for examination filed |
Effective date: 20110531 |
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DAX | Request for extension of the european patent (deleted) | ||
A4 | Supplementary search report drawn up and despatched |
Effective date: 20130208 |
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RIC1 | Information provided on ipc code assigned before grant |
Ipc: B05B 15/02 20060101ALI20130204BHEP Ipc: B05B 1/04 20060101ALI20130204BHEP Ipc: F24C 15/20 20060101ALN20130204BHEP Ipc: B05B 1/20 20060101AFI20130204BHEP |
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STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
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18D | Application deemed to be withdrawn |
Effective date: 20130910 |