EP1497593B1 - Gas handling system - Google Patents
Gas handling system Download PDFInfo
- Publication number
- EP1497593B1 EP1497593B1 EP03721186A EP03721186A EP1497593B1 EP 1497593 B1 EP1497593 B1 EP 1497593B1 EP 03721186 A EP03721186 A EP 03721186A EP 03721186 A EP03721186 A EP 03721186A EP 1497593 B1 EP1497593 B1 EP 1497593B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- casing
- units
- channels
- gas
- supporting structure
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/20—Casings or covers
-
- 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
- F24F3/044—Systems in which all treatment is given in the central station, i.e. all-air systems
Landscapes
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Drying Of Gases (AREA)
- Treating Waste Gases (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
- Separation Of Gases By Adsorption (AREA)
- Crystals, And After-Treatments Of Crystals (AREA)
- Glass Compositions (AREA)
Abstract
Description
- The present invention relates to a gas handling system and to a method of constructing it according to the preamble of claims 1 and 23, respectively. Such a system and method are known from DE-A-2 519 457.
- Gas handling systems are often custom-built and delivered to customers as a single factory-assembled block or in a multitude of elements that have to be constructed on site. Currently gas-handling systems are constructed using a framework of galvanized or stainless steel parts that are joined together. Steel panels are attached to the framework to form the outer casing of the system and the components of the gas handling system are mounted onto the casing.
- The construction of the outer casing is a complicated and time-consuming process as the metal panels have to be cut to shape and attached to the framework of the casing by riveting, screwing or welding. Manufacturing tolerances are high, as the elements constituting the system have to be produced with great precision to ensure accurate joining of the various parts. The casing comprises many individual parts, which results in high material costs. The system must be constructed with care and skill and mounting tools such as screwdrivers, riveting or welding tools are often required which also make the assembly costly.
- Conventional systems are quite heavy and are thus inconvenient to transport and handle. In the event of failure of a component of the gas handling system or if maintenance work or cleaning needs to be carried out, access to, and/or removal of the components that are fastened to the casing is troublesome due to the necessary screwing and unscrewing.
- The demands on gas quality in different environments vary depending on the activities pursued in the different environments. Places such as hospitals, laboratories and clean rooms utilized in the food, pharmaceutical and electronics manufacturing industry place extremely stringent demands on ventilation and air conditioning systems as people and/or products must be protected against pollutants, bacteria and toxic substances. The gas flowing through such systems can be at a high or low temperature and is sometimes corrosive and laden with dust. If there is a temperature difference between the outside the system and the gas inside the system, condensation can occur either on the inside or the outside of the casing.
- As the number of clean and hygienic applications continues to increase there is a growing need for safe and easy-to-use gas handling units that are easy to install and clean and which preferably contain no recesses or projections in which unwanted matter such as dirt or moisture can collect.
- It is an object of this invention to provide a simplified, lightweight gas handling system that can be manufactured easily and that ensures simple and rapid assembly and thus low cost installation.
- This object of the invention is achieved by utilizing a gas handling system, comprising one or more components such as a fan, filter, sound attenuator, humidifier, heater, cooler or heat exchanger enclosed in a casing, said casing comprises a plurality of conjoined units that comprise sealing means to provide a gas-tight seal between adjacent units. The gas handling system is characterized in that each unit comprises one or more channels that are aligned with corresponding channels in other units when said units are joined together, and that at least one of said channels is provided with a tension element threaded through said channel and is used as a guide for the tension element, which is arranged to draw the units together to form said casing.
- The object of the invention is further achieved by a method according to claim 23.
- For example each unit is placed on a common beam or base plate and then a person can draw the units together without requiring any special tools. The assembly work does not have to be carried out by a skilled person and because the casing is constructed first and then at least one component such as a fan, filter, sound attenuator, humidifier, heater, cooler or heat exchanger is inserted into said casing, great strength is not required. An advantage of this type of assembly is that the person constructing the system does not need to have access to all sides of the units. He/she merely aligns the units and draws them together. This means that a system can, for example, be constructed adjacent to a watt or in a space-restricted location.
- According to a preferred embodiment of the invention the gas handling system is constructed by prefabricating the plurality of individual units by gluing their constituent elements together, aligning the units and joining said units together for example by applying a force to the ends of casing to push the individual units together.
- In another preferred embodiment of the invention said channels contain connecting means between the components inside the casing i.e. electrical cables or optical fibres for transmitting signals between the components. In this way the connecting means do not hinder the flow of gas passing through the system as they are separated from the gas stream. In a preferred embodiment of the invention sealing means are applied between adjacent units to provide a gas-tight seal. The sealing means can be adapted to seal off the channels from the gas passing through the gas-handling system. Another possibility is to provide a light source, such as light emitting diodes, in a transparent channel along the inside of the casing so as to illuminate the inside of the system during maintenance or repair work or to aid monitoring of the system by sensors such as surveillance cameras when the system is in use. The presence of surveillance cameras along the inside of the casing eliminates the need for inspection windows, which are common in conventional systems, which decreases the number of potential leak sites.
- According to another preferred embodiment of the invention the units, which can have any cross-sectional shape, have the same transverse dimensions so that they are interchangeable. The individual units can be separated easily so the gas-handling system can be readily adapted to a different length or function to meet different/changing requirements. Furthermore if a supplier provides a standard range of cross-sectional sizes, systems can be modified easily by ordering new supplementary or replacement units. This dimensioning also aids efficient packaging, storage, handling, transportation and installation of the system.
- According to another preferred embodiment of the invention said casing comprises at least one unit whose constituent elements are glued together.
- According to another preferred embodiment of the invention the constituent elements of a unit comprise spacer means that position the elements at the optimum distance for gluing. The spacer means can either be incorporated into the design of the constituent elements or can be placed in-between elements that are to be glued together during the assembly of the unit. The glue used can be adapted to have vibration-damping properties.
- The casing according to the present invention can be made of any material however according to a preferred embodiment of the invention the casing comprises a material having a density up to 3000 kgm-3, preferably in the range 100 to 500 kgm-3 thereby significantly reducing the weight of the gas handling system as compared to a conventional system. The material is chosen to provide an inner casing surface that is at least one of the following: smooth, impenetrable, hygroscopic, non-hygroscopic, diffusion- and emission-free, wear resistant, thermally stable and/or chemical resistant.
- According to preferred embodiments of the invention the casing material comprises either a homogeneous material, such as a polymer/plastic, a composite, or a laminate fused by direct lamination under pressure and at high temperature such as Artboard™ or a laminate fused by high-pressure lamination such as Perstorp Laminate™. Both of these laminates are currently used as flooring. According to a preferred embodiment, of the invention the casing comprises material that is setf-supporting and which does not require a supporting framework as a foundation.
- Artboard™ is a fiber composite laminate consisting of mainly thermoset plastic and glass fibre having a density of 160 kgm-3. Using Artboard as the casing material can therefore reduce the weight of a gas handling system by up to 70%. Perstorp Laminate™ is a thermoset composite plastic fused at high temperature and pressure to form cross-linked polymers providing a stable, homogeneous material. It consists of layers of kraft paper, a brown paper made from high-quality sulphate wood pulp impregnated with phenolic resin which form a strong, rigid core and paper impregnated with clear melamine resin which provides an immensely durable, smooth surface. It has a density of 1400 kgm-3, it is unaffected by most chemicals, it is non-porous to water, it is stable at temperatures up to 180°C and it will not nourish or support fungi, moulds or bacteria which makes it suitable for hygienic applications. These laminates provide a leak-free casing and by modifying their thickness and resin formulation, their performance can be tailored to suit specific applications. The laminates have high-dimensional stability and high mechanical strength yet are resilient and thus energy absorbent. By varying the density, the shock absorbing and sound attenuating characteristics can be adjusted to meet specific requirements.
- According to a preferred embodiment of the invention the internal corners of the casing are rounded to produce perfectly smooth internal walls making cleaning easier and reducing the number of sites at which unwanted matter such as dirt or moisture can collect. This can be done by inserting corner joint pieces for example. In another preferred embodiment the casing incorporates at least one drainage canal to facilitate cleaning of the system. A gas handling system according to the present invention is therefore suitable for hygienic applications such as in a hospital, laboratory, in offshore or electronics applications or any other environment requiring a strictly controlled gas atmosphere.
- According to another preferred embodiment of the invention the said at least one component making up the gas handling system is supported on a structure that is inserted into or removed from the system via openings in the casing. This supporting structure can be a rack for example to which said component, or a plurality of components, is/are fastened. The components can thus be held in place without having to be fastened to the casing. In a preferred embodiment of the invention the surface of the supporting structure that makes contact with the casing comprises a low friction material that aids its movement into and out of said casing. In another preferred embodiment of the invention the supporting structure moves along guide rails or low friction material fixed to the inside of said casing. Such an arrangement means that components can be easily and rapidly installed and subsequently removed from the system for maintenance, replacement or cleaning. In another preferred embodiment of the invention the supporting structure comprises a panel of material that forms part of the casing when the supporting structure is in position inside the casing.
- The invention will now be described by way of example and with reference to the accompanying drawings in which:
- figure 1
- depicts the constituent elements of a single unit according to a preferred embodiment of the invention,
- figure 2
- shows a constituent part of a unit according to a preferred embodiment of the invention,
- figure 3
- illustrates a method of conjoining a plurality of units according to a preferred embodiment of the invention,
- figure 4
- shows part of the casing of a gas-handling system according to a preferred embodiment of the invention, and
- figure 5
- illustrates a casing material according to a preferred embodiment of the invention.
- Figure 1 depicts the constituent elements of a
single unit 10 having a square cross-section. The unit can of course be of any cross-sectional shape and size so that it can accommodate either a single component or an entire gas handling system. Since the number of elements constituting a single unit can be reduced such as by elimination of screws, the unit and thus the entire casing can be assembled at low cost. - The unit comprises
small channels 11 that run along the length of the unit. These channels can be aligned with corresponding channels in other units and can be used as a guide for a tension element when conjoining a plurality of units, or for electric/optic cables or a light source for example. Thechannels 11 can be located at the top, bottom and/or sides of the unit(s). Channels that carry light to illuminate the inside of the casing must run internally along the inside of the casing however the channels used as guides for a tension element or to accommodate connection cables may also be located externally along the outside of the units. - Figure 2 shows part of the
element 12 indicated in figure 1, which contains achannel 11 through which a tension element/electric or optic cable can be threaded. The element comprises spacer means 13 to position adjacent elements at the optimum distance for gluing together. - Figure 3 illustrates a method of conjoining three
prefabricated units 10. The units are placed on a common beam, movable supporting means or on a low friction surface andtension elements 14, that are threaded throughchannels 11 running along the length of the units are used to draw the individual units together. The method of constructing a casing therefore comprises the steps of prefabricating individual units each having at least one channel that can be aligned with corresponding channels in other units, aligning the units, threading a tension element through said channels and drawing said units together. The units comprise sealing means 15 to provide a gas-tight seal between adjacent units. The sealing means 15 are arranged to seal off thechannels 11 from the gas stream. - Figure 4 shows two
conjoined units 10. One of the units contains a component (not shown) of a gas handling system that is supported onstructure 16 that can be inserted into and removed from the system. The units comprise removable panels ordoors 17 that are sealed to the smooth outer surface of the casing once the components of the gas handling system have been placed inside the casing. In another preferred embodiment of the invention the supportingstructure 16 that bears the component is constructed to include a panel that provides part of the casing when it is in place inside the system. - Figure 5 shows a preferred casing material for a gas handling system. It comprises a laminate 18 having a core 19 consisting of layers of brown paper made from high-quality sulphate wood pulp impregnated with phenolic resin. The
surfaces 20 of the laminate comprise paper impregnated with clear melamine resin. The laminate can be modified to contain energy absorbing material.
Claims (25)
- A gas handling system, comprising one or more components, such as a fan, filter, sound attenuator, humidifier, heater, cooler or heat exchanger enclosed in a casing, said casing comprises a plurality of conjoined units (10) that comprise sealing means (15) to provide a gas-tight seal between adjacent units, characterized in that each unit (10) comprises one or more channels (11) that are aligned with corresponding channels in other units when said units are joined together, and that at least one of said channels (11) is provided with a tension element (14) threaded through said channel (11) and is used as a guide for the tension element (14), which is arranged to draw the units (10) together to form said casing.
- A system according to claim 1, characterized in that said channels (11) are arranged to run along the length of the units (10).
- A system according to claim 1 or 2, characterized in that said channels (11) are located at the top, bottom and/or sides of the units (10).
- A system according to claim 2 or 3, characterized in that said channels (11) are located internally along the inside of the units.
- A system according to claim 2 or 3, characterized in that said channels (11) are located extemally along the outside of the units.
- A system according to any preceding claims, characterized in that said channels (11) contain electrical/optical cables for transmitting signals between components inside the casing.
- A system according to claims 1-4 or 6, characterized in that said channels (11) being transparent and contain a light source, so as to illuminate the inside of the casing.
- A system according to any preceding claims, characterized in that said casing includes at least one unit (10) whose constituent elements are glued together.
- A system according to claim 8, characterized in that said constituent elements comprise spacer means (13) that position said elements at the optimum distance for gluing.
- A system according to any preceding claims, characterized in that the units (10) have the same transverse dimensions so that they are interchangeable.
- A system according to any preceding claims, characterized in that said casing comprises a material having a density up to 2500 kgm-3, preferably in the range 100 to 500 kgm-3.
- A system according to claim 11, characterized in that said material provides an inner casing surface that is at least one of the following: smooth, impenetrable, hygroscopic, non-hygroscopic, diffusion- and emission-free, wear resistant, thermally stable, chemical resistant.
- A system according to claims 11 or 12, characterized in that said material comprises a homogeneous or composite material.
- A system according to claims 11 or 12, characterized in that said material comprises a laminate or a high-pressure laminate (18).
- A system according to any of claims 11-14, characterized in that said material comprises an energy absorbing material.
- A system according to any preceding claims, characterized in that the internal corners of the casing are rounded to produce perfectly smooth internal walls.
- A system according to any preceding claims, characterized in that the casing incorporates at least one drainage canal to facilitate cleaning of the system.
- A system according to any preceding claims, characterized in that said at least one component is supported on a structure (16) that is inserted into or removed from said casing.
- A system according to claim 18, characterized in that the surface of the supporting structure (16) that makes contact with the casing comprises a low friction material that aids its movement into and out of said casing.
- A system according to claims 18 or 19, characterized in that said supporting structure (16) is movable arranged along guide rails or low friction material fixed to the inside of said casing.
- A system according to any of claims 18-20, characterized in that said supporting structure (16) comprises a panel that forms part of the casing when the supporting structure is in position inside the casing.
- A system according to any preceding claims, characterized in that it further comprises sensors, such as surveillance cameras, along the inside of the casing to monitor the system.
- A method of constructing a gas handling system enclosed in a casing, comprising the steps of:- prefabricating a plurality of individual units (10),- joining said units (10) together by applying sealing means (15) to provide a gas-tight seal between adjacent units (10), and- inserting at least one component such as a fan, filter, sound attenuator, humidifier, heater, cooler or heat exchanger, via an opening, into said casing, characterized in that the method further comprises the steps of:- aligning each unit (10) which has at least one channel (11) with corresponding channels in other units, and- joining said units (10) together by threading a tension element (14) through said channels and by means of the tension element (14) drawing said units together to form said casing.
- A method according to claim 23, characterized in that it further comprises the step of prefabricating a plurality of individual units (10) by gluing their constituent elements together.
- Use of a system according to any of claims 1-22 in a hospital, laboratory, in offshore or electronics applications or any other environment requiring a strictly controlled gas atmosphere.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE0201061 | 2002-04-09 | ||
SE0201061A SE525055C2 (en) | 2002-04-09 | 2002-04-09 | Gas treatment system enclosed in a housing consisting of a plurality of interconnected units, as well as a method of constructing and using such a system |
PCT/SE2003/000579 WO2003087676A1 (en) | 2002-04-09 | 2003-04-09 | Gas handling system |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1497593A1 EP1497593A1 (en) | 2005-01-19 |
EP1497593B1 true EP1497593B1 (en) | 2006-07-26 |
Family
ID=20287523
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP03721186A Expired - Lifetime EP1497593B1 (en) | 2002-04-09 | 2003-04-09 | Gas handling system |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1497593B1 (en) |
AT (1) | ATE334356T1 (en) |
AU (1) | AU2003224528A1 (en) |
DE (1) | DE60307080T2 (en) |
DK (1) | DK1497593T3 (en) |
SE (1) | SE525055C2 (en) |
WO (1) | WO2003087676A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2471292B (en) * | 2009-06-23 | 2013-09-11 | Flakt Woods Ltd | An air handling unit |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2519457A1 (en) * | 1975-05-02 | 1977-02-17 | Mabag Luft & Klimatechnik | Air conditioning unit construction - has housing within which units are mounted formed from framework profiles, wall plates and sealing profiles |
SE417641B (en) * | 1979-08-02 | 1981-03-30 | Hisaka Works Ltd | Plate heat exchanger |
NL9000987A (en) * | 1990-04-25 | 1991-11-18 | Lubbers Installaties B V | AIR TREATMENT DEVICE. |
-
2002
- 2002-04-09 SE SE0201061A patent/SE525055C2/en not_active IP Right Cessation
-
2003
- 2003-04-09 EP EP03721186A patent/EP1497593B1/en not_active Expired - Lifetime
- 2003-04-09 AT AT03721186T patent/ATE334356T1/en not_active IP Right Cessation
- 2003-04-09 WO PCT/SE2003/000579 patent/WO2003087676A1/en active IP Right Grant
- 2003-04-09 DK DK03721186T patent/DK1497593T3/en active
- 2003-04-09 AU AU2003224528A patent/AU2003224528A1/en not_active Abandoned
- 2003-04-09 DE DE60307080T patent/DE60307080T2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
SE525055C2 (en) | 2004-11-23 |
EP1497593A1 (en) | 2005-01-19 |
SE0201061D0 (en) | 2002-04-09 |
WO2003087676A1 (en) | 2003-10-23 |
DE60307080T2 (en) | 2007-02-08 |
AU2003224528A1 (en) | 2003-10-27 |
DK1497593T3 (en) | 2006-11-27 |
ATE334356T1 (en) | 2006-08-15 |
DE60307080D1 (en) | 2006-09-07 |
SE0201061L (en) | 2003-12-08 |
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Inventor name: FLAWN ORPANA, LISA Inventor name: SAGSTROEM, TOBIAS Inventor name: ROOS, GUNNAR Inventor name: WESTBERG, DANIEL Inventor name: EVERS, PEDER Inventor name: LAWRANCE, WILLIAM |
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