EP3395453B1 - Laboratory suction hood - Google Patents

Laboratory suction hood Download PDF

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Publication number
EP3395453B1
EP3395453B1 EP18168659.3A EP18168659A EP3395453B1 EP 3395453 B1 EP3395453 B1 EP 3395453B1 EP 18168659 A EP18168659 A EP 18168659A EP 3395453 B1 EP3395453 B1 EP 3395453B1
Authority
EP
European Patent Office
Prior art keywords
suction
suction hood
hood
housing
delivery means
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.)
Active
Application number
EP18168659.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3395453A1 (en
Inventor
Luca Pagano
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.)
Omicron Italia Srl
Original Assignee
Omicron Italia Srl
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 Omicron Italia Srl filed Critical Omicron Italia Srl
Publication of EP3395453A1 publication Critical patent/EP3395453A1/en
Application granted granted Critical
Publication of EP3395453B1 publication Critical patent/EP3395453B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B08B15/023—Fume cabinets or cupboards, e.g. for laboratories
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
    • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
    • F24F3/16—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by purification, e.g. by filtering; by sterilisation; by ozonisation
    • F24F3/163—Clean air work stations, i.e. selected areas within a space which filtered air is passed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L1/00—Enclosures; Chambers
    • B01L1/04—Dust-free rooms or enclosures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2200/00—Solutions for specific problems relating to chemical or physical laboratory apparatus
    • B01L2200/08—Ergonomic or safety aspects of handling devices
    • B01L2200/085—Protection against injuring the user
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
    • B01L2400/00—Moving or stopping fluids
    • B01L2400/04—Moving fluids with specific forces or mechanical means
    • B01L2400/0475—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure
    • B01L2400/0487—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics
    • B01L2400/049—Moving fluids with specific forces or mechanical means specific mechanical means and fluid pressure fluid pressure, pneumatics vacuum

Definitions

  • the present invention relates to a suction hood, in particular of the type used in chemical and biological laboratories.
  • suction hoods which may be of different type, in particular for normal processes or for distillation (i.e. with lowered platform) or without platform (the so-called walk-in suction hoods), are characterized by a base on which a platform rests, a work space placed over the platform and surrounded by side and bottom walls and by a front wall made of glass or similar transparent material, which is slidable such as to allow the closing and the partial or total opening, and finally by a roof, which forms the hood itself, which comprises an air, gas and fume evacuation duct provided with appropriate suction means.
  • the evacuation duct conveys air, gas and fumes out of the building in which the laboratory is housed, normally after passing through appropriate pollutant filtering and/or abatement systems.
  • the air flow aspirated from the environment of the laboratory by the suction means must be sufficiently high to prevent the pollutants present under the hood from exiting frontally, whereby invading the laboratory environment.
  • an air flow directed univocally from the environment of the laboratory towards the work space under the hood and from here towards the evacuation duct must be established.
  • a conventional suction hood must work with flow rates from about 650 to about 1100 m 3 /hr.
  • JPH02144158 discloses a suction hood in accordance with the preamble of claim 1, comprising a draft chamber wherein an air curtain is introduced from a hollow door.
  • EP0139128 discloses a clean bench wherein the air is recirculated and wherein a blower provides an air curtain.
  • JPH06233941 discloses a draft chamber which forms an air curtain in the front open part thereof.
  • DE3235927 discloses a clean room cabin with an air supply member and a particulate filter.
  • US2008311837 discloses a maintenance hood provided with an air curtain forming apparatus.
  • US2013095006 discloses a laminar flow device including a containing body and an air circulating unit.
  • WO2009018679 discloses an air curtain generating device.
  • the suction hood according to the invention indicated by reference numeral 1 as a whole, comprises a body 2 which encloses a work space 3.
  • the body 2 comprises a base block 4 having a work plane 5 on top which forms the lower surface of the work space 3.
  • the base block 4 may be provided with doors 6, which allow the access to an inner space to stow materials or instruments and may comprise knobs, switches or other controls 7 for switching on, adjusting or controlling light, suction or other installations with which the hood may be provided.
  • the base block 4 is missing, so that the work plane 5 coincides with the floor surface of the hood.
  • the expression "work plane” in the case of walk-in hoods will also mean this floor surface.
  • the body 2 further comprises side wall 8a, rear wall 8b and upper wall 8c, which delimit the work space 3 on four sides, while the front side 8d is open.
  • a lifting-lowering panel 9 made at least in part of transparent material, such as for example glass, crystal or polymeric material, is slidingly mounted on the front side of the body 2.
  • the lifting-lowering panel 9 allows the total closing or partial or total opening of the front side of the body 2, allowing operative access to the work space 3 and, in all cases, the visual access to it, i.e. also with the panel all down.
  • the lifting-lowering panel 9 comprises a counter-weight member 10 which comprises a counter-weight 11 connected to the panel 9 by system of rope 12 and pulley 13, which allows, in an entirely conventional manner, to position the lifting-lowering panel 9 at the required working height.
  • the working height is allowed from the lower position of the lifting-lowering panel to a maximum of 60 cm from the work plane.
  • the operator works with the lifting-lowering panel at 50 cm from the work plane.
  • the counter-weight member 10 further comprises stop means 14 connected to the cable 12, so as to prevent the lifting-lowering panel 9 from suddenly dropping if the cable 12 breaks ( figure 3B ).
  • stop means 14 are known and may be, for example, similar to those conventionally used as stop means of the rolling shutters. They comprise a lever 15 actuated by a spring which, when the cable 12 tears, triggers the lever 15 to the extended position ( figure 3B ), so as to fit in suitable notches (not shown) present on the edge of the walls 8a, 8b of the body 2.
  • the upper wall 8c of the body 2 comprises a hole from which an air, fume and vapor evacuation duct 16 departs.
  • the evacuation duct 16 comprises suction means 17, e.g. a suction fan, typically at the hole of the upper wall 8c.
  • the evacuation duct 16 conveys the air, the fumes and/or the vapors towards the outside of the building and typically comprises a treatment system (filtering, abatement etc.).
  • the suction hood 1 described hereto is entirely conventional.
  • the suction hood 1 of the invention further comprises means 18 for delivering a vertical air flow, arranged at the front side 8d of the body 2 and facing downwards, so as to convey an air curtain onto the front portion 5' of the work plane 5.
  • the delivery means 18 are placed in a housing 19 obtained under the front portion 8c' of the upper wall 8c of the body 2.
  • a housing 19 comprises an air intake, e.g. a grid (not shown), for aspirating air from the laboratory environment.
  • the housing 19 may be positioned immediately under the upper wall 8c or, preferably, in a lower position, typically on the level of the working height of the lifting-lowering panel 9, which, as mentioned, is normally between 40 and 60 cm from the work plane 5.
  • the housing 19' of the delivery means 18 is positioned on the inner face of the lifting-lowering panel 9, near its lower edge 9'.
  • the delivery means 18 comprise one or more fans (five in figure 1 and three in figure 2 ) or similar ventilation devices.
  • the air curtain is sent by the delivery means 18 towards the front portion 5' of the work plane 5, and thus - by virtue of the suction operated by the suction means 17 connected to the evacuation duct 16 - is directed towards the inside of the work plane 5, and thus aspirated upwards by said suction means 17.
  • the front portion 5' of the work plane 5 comprises a suction grid, so as to create a vertical air curtain which separates the work space 3 from the external environment of the laboratory.
  • the suction hood 201 is configured so as to create a frontal air curtain directed from the bottom upwards.
  • such an embodiment comprises delivery means 18', also in this case chosen from one or more fans or similar ventilation devices arranged with the delivery opening facing upwards.
  • the delivery means 18' are contained in a housing 19" arranged under the front portion 5' of the work plane 5.
  • the front portion 5' comprises, in this case, a delivery grid 20 from which air exits to form an air curtain which partially separates the work space 3 from the external environment before being aspirated by the suction means 17.
  • the housing 19, 19', 19" preferably has a length extension substantially equal to the width of the front side 8d of the body 2 and a depth of about 3-10 cm.
  • the flow rate of the delivery means 18, 18' must be slower than the flow rate of the suction means 17. So, a given amount of air will be aspirated directly through the front opening of the hood 1, 101, 201, so as to avoid absolutely the release of polluted air towards the laboratory; however, such an amount is considerably reduced by virtue of the air curtain which creates a barrier effect.
  • the flow rate aspirated by the suction means 17 will be, for example, of 300-310 m 3 /hr, while in a traditional suction hood, i.e. without the delivery means 18, it will be generally from 650 to 1100 m 3 /hr.
  • the flow rate of the supply means 18 may be, for example, of 200-210 m 3 /hr. However, it will be possible to appropriately size the air flows by reducing the aspirated flow up to 50 m 3 /hr and the air curtain to about 30 m 3 /hr without because of this penalizing the protection of the operator and of the laboratory environment.
  • the advantages of the suction hood 1 of the invention are not simply less consumption of electricity of the suction means 17 and the delivery means 18, but also concern air conditioning costs (cooling in summer and heating in winter) of the laboratory environment. For example, according to the calculation performed above, a saving from 350 to 800 m 3 /hr of conditioned air can be obtained with respect to a traditional suction hood.
EP18168659.3A 2017-04-27 2018-04-23 Laboratory suction hood Active EP3395453B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT102017000045556A IT201700045556A1 (it) 2017-04-27 2017-04-27 Cappa aspirante da laboratorio

Publications (2)

Publication Number Publication Date
EP3395453A1 EP3395453A1 (en) 2018-10-31
EP3395453B1 true EP3395453B1 (en) 2021-10-20

Family

ID=59811850

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18168659.3A Active EP3395453B1 (en) 2017-04-27 2018-04-23 Laboratory suction hood

Country Status (7)

Country Link
EP (1) EP3395453B1 (nl)
ES (2) ES2901459T3 (nl)
FR (1) FR3065787B3 (nl)
IT (1) IT201700045556A1 (nl)
NL (1) NL2020831B1 (nl)
PL (1) PL127284U1 (nl)
RO (1) RO201800019U3 (nl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3865224B1 (en) * 2020-02-13 2023-11-08 Visu Kaluste Oy Suspension system for a sash of a fume cupboard, and method in a sash of a fume cupboard
FR3116595B3 (fr) * 2020-11-24 2022-10-28 Noroit Hotte notamment pour le traitement d’échantillon contenant de l’ADN
CN112975217B (zh) * 2021-02-05 2023-05-26 重庆大江国立精密机械制造有限公司 一种汽车零配件焊接用除尘设备
CN114433269A (zh) * 2022-03-01 2022-05-06 张银花 一种智能通风的中央实验台

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3235927C1 (de) * 1981-03-07 1990-04-05 Glatt Maschinen & Appbau Ag Reinraumkammer
JPH0649279B2 (ja) * 1983-08-24 1994-06-29 株式会社日立製作所 清浄作業台
JPH074538B2 (ja) * 1988-11-25 1995-01-25 株式会社イトーキクレビオ ドラフトチャンバ
DE4106134A1 (de) * 1991-02-27 1992-09-03 Stroehlein Gmbh & Co Laborabzug in schrankform
JPH06233941A (ja) * 1993-02-10 1994-08-23 Daruton:Kk ドラフトチャンバ
US20080311837A1 (en) * 2007-06-12 2008-12-18 United Microelectronics Corp. Preventive maintenance hood
WO2009018679A1 (fr) * 2007-08-06 2009-02-12 Acxing Industrial Co., Ltd. Dispositif générateur de rideau d'air
US20130095006A1 (en) * 2011-10-14 2013-04-18 Yang-Te Hsu Laminar Flow Device
EP3099429A1 (en) * 2014-01-30 2016-12-07 Laborial Soluções Para Laboratório S.A. Fume hood

Also Published As

Publication number Publication date
RO201800019U2 (ro) 2019-01-30
PL127284U1 (pl) 2018-11-05
IT201700045556A1 (it) 2018-10-27
NL2020831B1 (en) 2020-01-13
FR3065787B3 (fr) 2019-12-13
EP3395453A1 (en) 2018-10-31
RO201800019U3 (ro) 2024-03-29
NL2020831A (en) 2018-11-02
FR3065787A3 (fr) 2018-11-02
ES1212590U (es) 2018-05-18
ES2901459T3 (es) 2022-03-22

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