FI125767B - hood - Google Patents

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Publication number
FI125767B
FI125767B FI20135593A FI20135593A FI125767B FI 125767 B FI125767 B FI 125767B FI 20135593 A FI20135593 A FI 20135593A FI 20135593 A FI20135593 A FI 20135593A FI 125767 B FI125767 B FI 125767B
Authority
FI
Finland
Prior art keywords
housing
hood
wall
air
channel
Prior art date
Application number
FI20135593A
Other languages
Finnish (fi)
Swedish (sv)
Other versions
FI20135593A (en
Inventor
Vesa Jumppanen
Pasi Karpiala
Robert Horoszkiewicz
Original Assignee
Climecon Oy
SeaKing Oy
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 Climecon Oy, SeaKing Oy filed Critical Climecon Oy
Priority to FI20135593A priority Critical patent/FI125767B/en
Priority to EP14170190.4A priority patent/EP2808613B1/en
Publication of FI20135593A publication Critical patent/FI20135593A/en
Application granted granted Critical
Publication of FI125767B publication Critical patent/FI125767B/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B15/00—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area
    • B08B15/02—Preventing escape of dirt or fumes from the area where they are produced; Collecting or removing dirt or fumes from that area using chambers or hoods covering the area
    • 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
    • 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
    • F24C15/2057—Removing cooking fumes using a cleaning liquid

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Ventilation (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Separating Particles In Gases By Inertia (AREA)

Description

Hood extractor
The invention relates to a hood extractor for extracting contaminated air from appliances.
In commercial kitchens contaminated air produced by cooking appliances is extracted by a hood extractor mounted above the appliances. The hood extractor comprises a grease filter, which collects grease and dust from the air. Additionally, the hood extractor may comprise a UV light source emitting UV light, which breaks the grease molecules into small particles, which are removed from the hood extractor with the air flow.
Despite the use of the grease filter and the UV light, the extractor surfaces collect grease and dust, which has to be removed periodically. This is done by spraying washing agent mixed with water into the extractor through nozzles. Typically the spraying system is realized by fitting nozzles to pipes arranged inside the extractor. This construction, however, needs a lot of space inside the extractor, which in turn increases the dimensions of the extractor and air pressure drop caused by the extractor. Further, there is a gap between the pipe and the extractor wall, which collects grease and dust, which is difficult remove by washing. Also the spraying angle of the nozzles is not always an optimal, which weakens the washing result.
The object of the present invention is to provide an improved hood extractor.
This object can be achieved by a hood extractor according to independent claim 1.
The hood extractor according to the invention comprises a housing through which air to be extracted is arranged to flow, an air inlet for conducting air into the housing, an air outlet for removing air from the housing, a grease filter arranged in the housing between the air inlet and the air outlet and an arrangement for spraying washing agent into the housing. The arrangement for spraying washing agent comprises at least one duct and nozzles for spraying wash- ing agent from the duct into the housing. The nozzles are formed in a wall of the duct.
The hood extractor according to the invention causes a low air pressure drop, since the nozzles are formed in the wall of the duct and therefore do not extend outwards from surface of the duct.
According to an embodiment of the invention the duct is attached to or integrated into the wall of the housing or installed with a small gap between it and the wall of the housing. This further reduces the air pressure drop in the extractor. If the duct is attached or integrated into the wall of the housing, there is no gap between the duct and the wall of the housing and no grease and dust can go therebetween. This makes it easier to wash the surfaces of the hood extractor efficiently.
In the following the invention will be described by way of examples with reference to the accompanying drawings, in which:
Fig. 1 is a cross-sectional view of a hood extractor according to an embodiment of the invention,
Fig. 2 is a cross-sectional view of a duct that can be used in the hood extractor of fig. 1.
Fig. 3 is a cross-sectional view of a nozzle that can be used for injecting washing agent from the duct into the interior of the hood extractor.
Fig. 4 shows from above a spin plate of the nozzle of fig. 3.
Fig. 1 shows a hood extractor 1 according to an embodiment of the invention. In kitchens contaminated air from cooking appliance(s) is extracted by the hood extractor 1, which is mounted above the cooking appliance(s). The hood extractor 1 can be used in ship kitchens, restaurants, hotels and other commercial kitchens.
The hood extractor 1 comprises a housing 2, through which air to be extracted is arranged to flow. The housing 2 is provided with an air inlet 3 for conducting air into the housing 2 and an air outlet 4 for removing air from the housing 2. The air outlet 4 is connected to an exhaust duct, which conducts air to the atmosphere. Air is sucked through the housing 2 by a fan installed downstream of the air outlet 4. The hood extractor 1 comprises a hood 18, which prevents contaminated air from escaping to the kitchen and directs air toward the air inlet 3. The front wall 15 of the housing comprises a baffle 12 having a front surface 13, which directs the airflow downwards after passing through the air inlet 3.
A grease filter 7 for collecting grease from the air flow is arranged in the housing 2 between the air inlet 3 and the air outlet 4. The grease filter 7 can be a mesh or baffle filter or a hybrid of mesh filter and baffle filter. The grease filter 7 is installed between a front wall 15 and a rear wall 19 of the housing 2 so that all the air flowing from the air inlet 3 to air outlet 4 passes through the grease filter 7.
The hood extractor 1 further comprises a UV light source 20, which emits UV light. UV light breaks the grease molecules into small particles, which are removed from the hood extractor 1 with the air flow. The UV light source 20 is installed in the housing 2 downstream of the grease filter 7.
In use the housing 2 surfaces collect grease and dust, which has to be removed periodically. For this purpose the hood extractor 1 comprises an arrangement for spraying washing agent into housing 2. Washing agent can be water, pure washing agent or mixture of water and washing agent. The arrangement for spraying washing agent comprises at least one duct 5 attached to or integrated into a wall of the housing 2 and nozzles 6 for spraying washing agent from the duct 5 into the housing 2. The duct 5 is arranged in the housing 2. The duct 5 can be attached directly to the wall of the housing 2 or installed with a gap between it and the wall of the housing 2. The width of the gap is less than 50 mm, typically less than 20 mm. Also this gap can be washed with nozzles 6, for example the nozzles 6 can be formed in a wall of the duct 5, which faces the wall of the housing 2. Washing agent is conducted into housing 2 along the duct 5 and sprayed by nozzles 6 into the housing 2.
The duct 5 can be attached to or integrated into the wall of the housing 2 upstream of the grease filter 7. A front wall 15 of the housing 2 comprises a baffle 12 having a front surface 13for directing the airflow downwards after passing through the air inlet 3. The duct 5 can be attached to or integrated into or arranged on a rear surface 14 of the baffle 12. Additionally or alternatively, the duct 5 can be attached to or integrated into or arranged on an inner corner between a bottom wall 21 and the rear wall 19 of the housing 2. Additionally or alternatively, the duct 5 can be attached to or integrated into or arranged on the wall of the housing 2 downstream of the grease filter 7. For example, the duct 5 can be attached to or integrated into or arranged on an inner corner between the front wall 15 or rear wall 19 and a top wall 16 of the housing 2.
The duct 5 has an angular cross-section. The duct 5 comprises a rear wall 22, which is arranged against the wall of the housing 2. Alternatively, the wall of the housing 2 may form the rear wall of the duct 5. The duct 5 comprises at least three walls, typically 4-6 walls, which are arranged at an angle with respect to each other. The angle between the walls can be selected so that washing agent can be sprayed at an optimal angle from the nozzles 6. The walls of the duct 5 are flat. At least two of the walls are provided with nozzles 6 for spraying washing agent into the housing 2. Typically, the walls, which are directed towards the interior of the housing 2, are provided nozzles 6 for spraying washing agent into the housing 2.
According to an embodiment of the invention shown in figs. 3 and 4, the nozzles 6 are formed in the wall or walls of the duct 5. The nozzle 6 comprises a nozzle opening 8 in the wall of the duct 5. The washing agent is sprayed from the nozzle opening 8 into the housing 2.The diameter of the nozzle opening 8 is 0.7-1 mm. The shape and/or the diameter of nozzle opening 8 affect the droplet size and/or the shape of the spraying pattern. The nozzle 6 further comprises a spin plate 9 having an S-shaped opening 10. The spin plate 9 is arranged against the inner surface of the wall of the duct 5 so that the nozzle opening 8 and the S-shaped opening 10 are facing each other. The nozzle 6 further comprises a block plate 11 arranged against the spin plate 8 so that both ends of the S-shaped opening 10 are uncovered. With this type of nozzle a swirl of washing agent can be formed in the housing 2. Additionally or alternatively, other types of nozzles can be used, for example conventional spray nozzles, which are mounted to the wall of the duct 5 and extend outwards from the duct 5.
The distance between adjacent nozzles 6 in the wall of the duct 5, as measured in the longitudinal direction of the duct 5, is 100-200 mm, typically 130-170 mm. The pressure of the washing agent in the duct 5 is below 15 bar, typically 8-10 bar.
The hood extractor 1 further comprises a filter nozzle 17 for injecting washing agent directly into the grease filter 7. The filter nozzle 17 is arranged to inject washing agent into the grease filter 7 from a filter end which faces the wall of the housing 2. By means of the filter nozzle 17 the grease filter 7 can be cleaned efficiently.
The hood extractor is also provided with a drain opening 23, through which washing agent is removed from the housing 2. The drain opening 23 is formed in the bottom wall 21 of the housing 2.

Claims (13)

1. Huuva (1) likaantuneen ilman poistamiseksi laitteista, joka huuva (1) käsittää: - kotelon (2), jonka läpi poistettava ilma on järjestetty virtaamaan, - ilman sisäänmenon (3) ilman johtamiseksi koteloon (2), - ilman ulostulon (4) ilman poistamiseksi kotelosta (2), - rasvasuodattimen (7), joka on järjestetty koteloon (2) ilman sisäänmenon (2) ja ilman ulostulon (4) väliin, ja -järjestelyn pesuaineen ruiskuttamiseksi koteloon (2), joka järjestely käsittää ainakin yhden kanavan (5) ja suuttimia (6) pesuaineen ruiskuttamiseksi kanavasta (5) koteloon (2), jotka suuttimet (6) on muodostettu kanavan (5) seinämään, tunnettu siitä, että suutin (6) käsittää kanavan (5) seinämässä olevan suutinaukon (8), pyörähdyslevyn (9), jossa on S-muotoinen aukko (10) ja joka on järjestetty vasten kanavan (5) seinämän sisäpintaa siten, että suutinaukko (8) ja S-muotoinen aukko (10) ovat toistensa kanssa vastakkain, ja sulkulevyn (11), joka on järjestetty vasten pyörähdyslevyä (9) siten, että S-muotoisen aukon (10) molemmat päät ovat paljaita.A hood (1) for removing contaminated air from devices, the hood (1) comprising: - a housing (2) through which the exhaust air is arranged to flow, - an air inlet (3) for introducing air into the housing (2), - an air outlet (4) ) for removing air from the housing (2), - a grease filter (7) arranged in the housing (2) between the air inlet (2) and the air outlet (4), and - an arrangement for injecting detergent into the housing (2); (5) and nozzles (6) for injecting detergent from the duct (5) to the housing (2), which nozzles (6) are formed on the wall of the duct (5), characterized in that the nozzle (6) comprises a nozzle opening (8) ), a rotary plate (9) having an S-shaped opening (10) arranged against the inner surface of the channel (5) wall with the nozzle opening (8) and an S-shaped opening (10) facing each other, and a closing plate ( 11) which is arranged against the wheel hdyslevyä (9), so that the S-shaped opening (10), the two ends are exposed. 2. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että kanavan (5) poikkileikkaus on kulmikas.Hood (1) according to Claim 1, characterized in that the channel (5) is angular in cross-section. 3. Patenttivaatimuksen 1 tai 2 mukainen huuva (1), tunnettu siitä, että kanava (5) käsittää takaseinämän (22), joka on järjestetty kotelon (2) seinämää vasten.The hood (1) according to claim 1 or 2, characterized in that the channel (5) comprises a rear wall (22) arranged against the wall of the housing (2). 4. Patenttivaatimuksen 1 tai 2 mukainen huuva (1), tunnettu siitä, että kotelon (2) seinämä muodostaa kanavan (5) takaseinämän.Hood (1) according to Claim 1 or 2, characterized in that the wall of the housing (2) forms the rear wall of the channel (5). 5. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että kanava (5) on kiinnitetty tai integroitu kotelon (2) seinämään.Hood (1) according to Claim 1, characterized in that the channel (5) is fixed or integrated in the wall of the housing (2). 6. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että kanava (5) on järjestetty koteloon (2) vastavirtaan rasvasuodattimesta (7).Hood (1) according to Claim 1, characterized in that the channel (5) is arranged in the housing (2) upstream of the grease filter (7). 7. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että huuva (1) käsittää suodatinsuuttimen (17) pesuaineen ruiskuttamiseksi suoraan rasvasuodattimeen (7).A hood (1) according to claim 1, characterized in that the hood (1) comprises a filter nozzle (17) for directly injecting detergent into the grease filter (7). 8. Patenttivaatimuksen 7 mukainen huuva (1), tunnettu siitä, että the suodatinsuutin (17) on järjestetty ruiskuttamaan pesuainetta rasvasuodattimeen (7) suodattimen päästä, joka on vasten kotelon (2) seinämää.Hood (1) according to Claim 7, characterized in that the filter nozzle (17) is arranged to inject detergent into the grease filter (7) from the end of the filter which is against the wall of the housing (2). 9. Jonkin edellä olevan patenttivaatimuksen 1-5 mukainen huuva (1), tunnettu siitä, että kanava (5) ainakin kolme seinämää, jotka on järjestetty kulmaan toistensa suhteen.Hood (1) according to one of claims 1 to 5, characterized in that the channel (5) has at least three walls arranged at an angle to each other. 10. Patenttivaatimuksen 9 mukainen huuva (1), tunnettu siitä, että kanavan(5) seinämät, jotka on suunnattu kohti kotelon (2) sisäpuolta, on varustettu suuttimilla (6).Hood (1) according to Claim 9, characterized in that the walls of the channel (5) facing the interior of the housing (2) are provided with nozzles (6). 11. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että kotelon (2) etuseinämä käsittää ohjauslevyn (12), jossa on etupinta (13) ilmavirran suuntaamiseksi alaspäin ilman sisäänmenon (3) jälkeen, ja että kanava (5) on kiinnitetty tai integroitu ohjauslevyn (12) takapintaan (14).A hood (1) according to claim 1, characterized in that the front wall of the housing (2) comprises a baffle plate (12) having a front surface (13) for directing downward flow of air downstream of the air inlet (3); integrated with the rear surface (14) of the baffle plate (12). 12. Patenttivaatimuksen 1 tai 11 mukainen huuva (1), tunnettu siitä, että kanava (5) on kiinnitetty tai integroitu kotelon (2) etuseinämän (15) ja katon (16) väliseen sisäkulmaan.A hood (1) according to claim 1 or 11, characterized in that the channel (5) is fixed or integrated in the inner angle between the front wall (15) of the housing (2) and the roof (16). 13. Patenttivaatimuksen 1 mukainen huuva (1), tunnettu siitä, että myötävirtaan rasvasuodattimesta (7) on järjestetty UV-valolähde (20).A hood (1) according to claim 1, characterized in that a UV light source (20) is provided downstream of the grease filter (7).
FI20135593A 2013-05-29 2013-05-29 hood FI125767B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FI20135593A FI125767B (en) 2013-05-29 2013-05-29 hood
EP14170190.4A EP2808613B1 (en) 2013-05-29 2014-05-28 Hood extractor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20135593 2013-05-29
FI20135593A FI125767B (en) 2013-05-29 2013-05-29 hood

Publications (2)

Publication Number Publication Date
FI20135593A FI20135593A (en) 2014-11-30
FI125767B true FI125767B (en) 2016-02-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
FI20135593A FI125767B (en) 2013-05-29 2013-05-29 hood

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EP (1) EP2808613B1 (en)
FI (1) FI125767B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10337749B2 (en) 2017-08-16 2019-07-02 Biozone Scientific International, Inc. Ultraviolet light system
CN108731059A (en) * 2018-06-01 2018-11-02 嘉兴宇乾环保科技有限公司 A kind of wall-mounted equipment of kitchen oil fume purifying environmental protection
CN111237827B (en) * 2018-11-28 2022-03-18 宁波方太厨具有限公司 Fan system capable of cleaning front-end filter screen
CN111059598B (en) * 2020-01-07 2021-10-12 宁波方太厨具有限公司 Fume exhaust fan

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Also Published As

Publication number Publication date
EP2808613B1 (en) 2016-12-07
FI20135593A (en) 2014-11-30
EP2808613A1 (en) 2014-12-03

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