EP1558878B1 - Inspection device for conveyor ducts for aeriform media - Google Patents
Inspection device for conveyor ducts for aeriform media Download PDFInfo
- Publication number
- EP1558878B1 EP1558878B1 EP02760559A EP02760559A EP1558878B1 EP 1558878 B1 EP1558878 B1 EP 1558878B1 EP 02760559 A EP02760559 A EP 02760559A EP 02760559 A EP02760559 A EP 02760559A EP 1558878 B1 EP1558878 B1 EP 1558878B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- frame
- wall
- duct
- inspection
- illumination 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.)
- Expired - Lifetime
Links
- 238000007689 inspection Methods 0.000 title claims description 45
- 238000005286 illumination Methods 0.000 claims description 24
- 239000012780 transparent material Substances 0.000 claims description 4
- 239000011521 glass Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 239000004417 polycarbonate Substances 0.000 claims description 3
- 229920000515 polycarbonate Polymers 0.000 claims description 3
- 238000011179 visual inspection Methods 0.000 claims description 3
- 229920002994 synthetic fiber Polymers 0.000 claims description 2
- 210000002105 tongue Anatomy 0.000 description 14
- 238000004140 cleaning Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 230000003749 cleanliness Effects 0.000 description 3
- 230000000295 complement effect Effects 0.000 description 3
- -1 for example Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 239000004065 semiconductor Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 1
- 229920005372 Plexiglas® Polymers 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000011109 contamination Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 229920002457 flexible plastic Polymers 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
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- 238000009423 ventilation Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Images
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
- F24F13/02—Ducting arrangements
- F24F13/029—Duct comprising an opening for inspection, e.g. manhole
-
- 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
- F24F13/02—Ducting arrangements
Definitions
- the subject of the present invention is an inspection device for ducts for aeriform media, in particular, air in climate-control, air-conditioning, heating, ventilation, and air-extraction and air-exchange systems.
- the ducts require frequent inspection and cleaning operations at intervals which are variable and difficult to define.
- An inspection door is usually constituted by two plastics shells with dimensions larger than the dimensions of the access opening, the two shells being superimposed and connected to one another by means of screws which can move the shells towards one another and apart so that one shell can be positioned on the inside and the other on the outside of the wall including the access opening and the shells can be tightened against the wall from both sides in order to close the opening therein.
- the object of the present invention is therefore to propose an inspection device for conveyor ducts for aeriform media, in particular air, having characteristics such as to overcome the problems mentioned with reference to the prior art.
- a inspection device for conveyor duct for aeriform media in particular for air in climate-control, air-conditioning and air-exchange systems, comprising a porthole element of substantially transparent material and a frame which can be connected to a wall of the conveyor duct in the region of an access opening provided in the wall, in a manner such that the porthole element is superimposed on the access opening and the access opening is substantially hermetically closed, illumination means, directed towards the interior of the conveyor duct, being provided an being suitable for illuminating a conveying space therein, permitting visual inspection thereof, both when the system is idle and when the system is in operation.
- an inspection device for a conveyor duct is generally indicated 1.
- the inspection device 1 comprises a porthole element 2 of substantially transparent material, for example, glass or plastics material, and a frame 3 to be connected to a wall 4 of the conveyor duct in the region of an access opening 6 provided in the wall 4, in a manner such that the porthole element 2 is superimposed on the access opening 6 and the access opening 6 is closed.
- the inspection device 1 advantageously has illumination means, preferably an electric lamp 7 which can be supplied with energy, for example, by means of an electrical cable connected to the mains or to a battery, the illumination means 7 being directed towards the interior of the conveyor duct and being suitable for illuminating a conveying space therein to permit inspection thereof.
- illumination means preferably an electric lamp 7 which can be supplied with energy, for example, by means of an electrical cable connected to the mains or to a battery, the illumination means 7 being directed towards the interior of the conveyor duct and being suitable for illuminating a conveying space therein to permit inspection thereof.
- the porthole element 2 is connected to the frame 3 releasably, preferably by threaded or bayonet means, to permit the opening and closure of an inspection opening 8 delimited by the frame 3 and to afford access to the interior of the conveyor duct through the inspection opening 8.
- the frame 3 preferably has a substantially annular shape with an inner surface 13 which faces towards the interior of the conveyor duct, is substantially smooth, and is preferably chamfered around its outer periphery 14 in order advantageously to reduce the resistance to the airflow and to prevent the formation of recesses which lead to the deposition of dirt and to the harbouring of bacteria.
- the inspection opening 8 of the frame 3 is delimited by an inner edge 15 of a shape substantially complementary with the periphery 9 of the porthole element 2 and, in particular, with the step 11, for which it forms a support.
- the periphery 9 and the inner edge 15 have complementary shapes such that an inner surface 16 of the porthole element 2 is substantially aligned with the inner surface 13 of the frame 3 in order to form a substantially uniform and preferably smooth and uninterrupted internal surface of the inspection device 1.
- the frame 3 advantageously has inner tongues 16 projecting substantially radially towards the centre of the frame 3 and preferably arranged at regular intervals around the inspection opening 8 in positions corresponding to the positions of the outer tongues 10 of the porthole element.
- the intervals between the inner tongues 16 permit the insertion of the outer tongues 10 of the porthole element during the movement of the latter towards the frame 3.
- Rotation of the porthole element 2 for example, by means of one or more handles 17, preferably formed on an outer surface of the porthole element 2, inserts the outer tongues 10 in the space between the inner tongues 16 and the inner edge 15 of the frame 3 where they are locked, for example, by the friction between the tongues 10, 16.
- the inspection device 1 has suitable stop means for ensuring that the porthole element 2 is positioned and stopped relative to the frame 3 in a predetermined closure position.
- the stop means are preferably resiliently deformable or resiliently movable in order to bring about resilient and/or snap stopping.
- the outer tongues 10 of the porthole element 2 have, on the side facing towards the inner tongues 16 of the frame 3, projections 18 suitable for engaging respective grooves 19 formed in the inner tongues 16 of the frame 3.
- the projections 18 advantageously snap-engage the grooves 19 owing to the relative pliability of the tongues 10 and 16.
- a suitable channel 22 formed in the frame 3 is provided for housing an electrical cable for supplying the lamp 7.
- the space for housing the illumination means 7 is delimited by a transparent wall 20 facing towards the interior of the conveyor duct and by an opaque wall 21 facing towards the exterior of the duct so as to ensure illumination of the conveying space without dazzling the person inspecting the duct through the inspection device 1.
- the frame 3 comprises an outer half-frame 3' to be associated with the wall 4 on the outside of the duct and an inner half-frame 3" to be associated with the wall 4 on the inside of the duct.
- the inner and outer half-frames 3" and 3' advantageously have complementary shapes and can be connected to one another by connection means, preferably threaded or snap connection means and, in the specific embodiment, by connection screws 12, to form the frame 3.
- the frame 3, preferably composed of these two half-frames 3' and 3", has a substantially U-shaped peripheral portion 23 which can house and protect an edge 24 delimiting the access opening 6, as well as connecting the device 1 to the wall 4.
- the peripheral portion 23 is advantageously formed by an outer flange 25 of the outer half-frame 3', an inner flange 26 of the inner half-frame 3'', and a circular wall 27 substantially perpendicular to the inner and outer flanges 26 and 25.
- the circular wall 27 advantageously delimits, together with the transparent and opaque walls 20 and 21, a channel which extends substantially around the periphery of the inspection opening 8 and which houses the tubular lamp 7.
- the channel and, more generally, the space for housing the illumination means 7 has an opening which enables the illumination means 7 to be replaced, preferably without complete dismantling of the inspection device 1.
- the opening is advantageously covered by means of the outer half-frame 3' so as to permit replacement of the illumination means 7 without removal of the inner half-frame 3" from the wall 4 of the duct.
- the inspection device is advantageously but not necessarily made of synthetic material, for example, plastics material or Plexiglas, preferably polycarbonate with a glass content.
- the frame 3 and the porthole element 2 may also be made of different materials, for example, stainless steel for the frame and polycarbonate for the porthole element.
- the illumination means emit a substantially azure light.
- Azure light has in fact been found to have an unusual ability to render metal surfaces, particularly stainless-steel surfaces, highly visible and to show up impurities on the surfaces extremely well.
- the illumination means 7 emit a suffused light, further increasing the positive effect of the azure light. This is very advantageous in environments which require a very high degree of air cleanliness, such as operating theatres and hospitals in general, semiconductor and microprocessor production plants, in the pharmaceutical field, etc.
- the inspection device 1 permits visual inspection of the interior of a conveyor duct in optimal light conditions both when the system is idle and when the system is in operation.
- the interior of the conveyor duct can be illuminated both when the inspection opening 8 is closed by the porthole element 2 and when it is open.
- the releasable connection of the porthole element to the frame permits cleaning of the internal surface of the porthole element and easy replacement thereof, if necessary, thus ensuring maximum transparency of the porthole element and hence optimal visibility of the interior of the duct through the porthole element.
- the inspection device 1 is particularly suitable for use in conveyor ducts in critical environments such as hospitals, in the semiconductor and microprocessor industries, etc. where a high degree of air cleanliness is required. In fact, the device 1 permits both access to the interior of the duct for cleaning and maintenance operations and visual checking of the results of these operations, in very favourable conditions.
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Investigating Materials By The Use Of Optical Means Adapted For Particular Applications (AREA)
Description
- The subject of the present invention is an inspection device for ducts for aeriform media, in particular, air in climate-control, air-conditioning, heating, ventilation, and air-extraction and air-exchange systems.
- To ensure the cleanliness of the air conveyed, for example, along the ducts of an air-conditioning system, the ducts require frequent inspection and cleaning operations at intervals which are variable and difficult to define.
- Since the conveyor systems do not have regular openings in addition to the air-intake and air-outlet openings, many of the ducts of the conveyor systems are inaccessible and hermetically separated from the environment. This makes it very difficult if not impossible to monitor events which take place inside the ducts, in particular to check the state of contamination of the surfaces delimiting the conveying space.
- It is consequently difficult to determine the most appropriate moment for maintenance and for cleaning of the ducts and to identify any dangerous conditions or other abnormalities which might prejudice normal and safe operation of the air-conveyor system.
- There are known inspection systems which provide for access openings in the walls of the ducts to afford access to the interior thereof, and in which the openings can be closed by inspection doors. An inspection door is usually constituted by two plastics shells with dimensions larger than the dimensions of the access opening, the two shells being superimposed and connected to one another by means of screws which can move the shells towards one another and apart so that one shell can be positioned on the inside and the other on the outside of the wall including the access opening and the shells can be tightened against the wall from both sides in order to close the opening therein.
- However, the mounting and removal of the two shells of the inspection doors is complex and expensive in terms of time.
- Moreover, each time access to the interior of the duct is required, the edges of the access opening are exposed and become more and more damaged and may lose polluting material, for example, fragmented thermal-insulation material.
- The access openings of the prior art allow the interior of the duct to be inspected only when the system is idle and inspection is in any case difficult owing to the poor accessibility and illumination which are due both to the limited dimensions of the access opening and to the often poor accessibility of the conveyor ducts.
- It is known from document US-A-3782411 of an inspection device, comprising a porthole element of substantially transparent material and a frame which can be connected to a wall of the conveyor duct in the region of an access opening provided in the wall. However this inspection device does not comprise illumination means to have easier and better inspection of the conveyor ducts.
- It is also known from document JP A 2001121172 of feature as illuminating lights to illuminate the inside of tank installed facing the inside surface of the inspection device. The illuminating lights installed facing the inside surface of the inspection device could lead to the deposition of dirt.
- The object of the present invention is therefore to propose an inspection device for conveyor ducts for aeriform media, in particular air, having characteristics such as to overcome the problems mentioned with reference to the prior art.
- These and other objects are achieved by means of a inspection device for conveyor duct for aeriform media, in particular for air in climate-control, air-conditioning and air-exchange systems, comprising a porthole element of substantially transparent material and a frame which can be connected to a wall of the conveyor duct in the region of an access opening provided in the wall, in a manner such that the porthole element is superimposed on the access opening and the access opening is substantially hermetically closed, illumination means, directed towards the interior of the conveyor duct, being provided an being suitable for illuminating a conveying space therein, permitting visual inspection thereof, both when the system is idle and when the system is in operation.
- For a better understanding of the invention, some embodiments are described below by way of non-limiting example, with reference to the appended drawings, in which:
- Figure 1 is an exploded and partially-sectioned, perspective view of the device according to the invention,
- Figure 2 is a plan view of a detail of the device according to the invention,
- Figure 3 is a plan view of a further detail of the device according to the invention,
- Figure 4 is a sectioned side view of the device according to the invention, during assembly,
- Figure 5 is a sectioned side view of the device according to the invention, mounted on a wall of a conveyor duct, and
- Figure 6 is a perspective view of a portion of a duct for aeriform media on which the inspection device according to the invention is mounted.
- With reference to Figure 1, an inspection device for a conveyor duct is generally indicated 1. The inspection device 1 comprises a
porthole element 2 of substantially transparent material, for example, glass or plastics material, and aframe 3 to be connected to awall 4 of the conveyor duct in the region of anaccess opening 6 provided in thewall 4, in a manner such that theporthole element 2 is superimposed on theaccess opening 6 and theaccess opening 6 is closed. - The inspection device 1 advantageously has illumination means, preferably an
electric lamp 7 which can be supplied with energy, for example, by means of an electrical cable connected to the mains or to a battery, the illumination means 7 being directed towards the interior of the conveyor duct and being suitable for illuminating a conveying space therein to permit inspection thereof. - The illumination means preferably comprise tubular electric lamps, advantageously flexible tubes, for example, a flexible plastics-coated cord with luminous resistors.
- According to one embodiment, the
porthole element 2 is connected to theframe 3 releasably, preferably by threaded or bayonet means, to permit the opening and closure of an inspection opening 8 delimited by theframe 3 and to afford access to the interior of the conveyor duct through the inspection opening 8. - According to the embodiment shown in Figure 1, the
porthole element 2, which is substantially flat and advantageously circular, has a plurality ofouter tongues 10 projecting substantially radially outwardly and preferably arranged at regular intervals around itsperiphery 9. Theouter tongues 10 are intended to engage inner tongues of theframe 3 which will be described below. Theperiphery 9 itself advantageously has anouter step 11, preferably a continuous circular step, for forming a reaction surface for an inner edge of theframe 3 which will be described below. - The
frame 3 preferably has a substantially annular shape with aninner surface 13 which faces towards the interior of the conveyor duct, is substantially smooth, and is preferably chamfered around itsouter periphery 14 in order advantageously to reduce the resistance to the airflow and to prevent the formation of recesses which lead to the deposition of dirt and to the harbouring of bacteria. - The inspection opening 8 of the
frame 3 is delimited by aninner edge 15 of a shape substantially complementary with theperiphery 9 of theporthole element 2 and, in particular, with thestep 11, for which it forms a support. - Preferably, the
periphery 9 and theinner edge 15 have complementary shapes such that aninner surface 16 of theporthole element 2 is substantially aligned with theinner surface 13 of theframe 3 in order to form a substantially uniform and preferably smooth and uninterrupted internal surface of the inspection device 1. - In order to form the above-mentioned releasable connection with the
porthole element 2, theframe 3 advantageously hasinner tongues 16 projecting substantially radially towards the centre of theframe 3 and preferably arranged at regular intervals around the inspection opening 8 in positions corresponding to the positions of theouter tongues 10 of the porthole element. The intervals between theinner tongues 16 permit the insertion of theouter tongues 10 of the porthole element during the movement of the latter towards theframe 3. - Rotation of the
porthole element 2, for example, by means of one ormore handles 17, preferably formed on an outer surface of theporthole element 2, inserts theouter tongues 10 in the space between theinner tongues 16 and theinner edge 15 of theframe 3 where they are locked, for example, by the friction between thetongues - According to one embodiment, the inspection device 1 has suitable stop means for ensuring that the
porthole element 2 is positioned and stopped relative to theframe 3 in a predetermined closure position. The stop means are preferably resiliently deformable or resiliently movable in order to bring about resilient and/or snap stopping. - In the embodiment shown in Figure 2, the
outer tongues 10 of theporthole element 2 have, on the side facing towards theinner tongues 16 of theframe 3,projections 18 suitable for engagingrespective grooves 19 formed in theinner tongues 16 of theframe 3. Theprojections 18 advantageously snap-engage thegrooves 19 owing to the relative pliability of thetongues - The inspection device 1 and, in particular, the
frame 3, delimits internally a space for housing the illumination means, for example, anelectric lamp 7, preferably a fluorescent tubular lamp. Asuitable channel 22 formed in theframe 3 is provided for housing an electrical cable for supplying thelamp 7. - Advantageously, the space for housing the illumination means 7 is delimited by a
transparent wall 20 facing towards the interior of the conveyor duct and by anopaque wall 21 facing towards the exterior of the duct so as to ensure illumination of the conveying space without dazzling the person inspecting the duct through the inspection device 1. - In order to achieve a high level of illumination without limiting the field of view, it is advantageous to provide an
elongate lamp 7, preferably a fluorescent tubular lamp which extends substantially around the periphery of the inspection opening 8 of the inspection device 1. - According to the embodiment shown in Figure 1, the
frame 3 comprises an outer half-frame 3' to be associated with thewall 4 on the outside of the duct and an inner half-frame 3" to be associated with thewall 4 on the inside of the duct. The inner and outer half-frames 3" and 3' advantageously have complementary shapes and can be connected to one another by connection means, preferably threaded or snap connection means and, in the specific embodiment, byconnection screws 12, to form theframe 3. - The
frame 3, preferably composed of these two half-frames 3' and 3", has a substantially U-shapedperipheral portion 23 which can house and protect anedge 24 delimiting the access opening 6, as well as connecting the device 1 to thewall 4. - The
peripheral portion 23 is advantageously formed by anouter flange 25 of the outer half-frame 3', aninner flange 26 of the inner half-frame 3'', and acircular wall 27 substantially perpendicular to the inner andouter flanges - The
circular wall 27 advantageously delimits, together with the transparent andopaque walls tubular lamp 7. - According to one embodiment, the channel and, more generally, the space for housing the illumination means 7, has an opening which enables the illumination means 7 to be replaced, preferably without complete dismantling of the inspection device 1. The opening is advantageously covered by means of the outer half-frame 3' so as to permit replacement of the illumination means 7 without removal of the inner half-
frame 3" from thewall 4 of the duct. - The inspection device is advantageously but not necessarily made of synthetic material, for example, plastics material or Plexiglas, preferably polycarbonate with a glass content.
- Alternatively, the
frame 3 and theporthole element 2 may also be made of different materials, for example, stainless steel for the frame and polycarbonate for the porthole element. - According to a further aspect of the invention, the illumination means emit a substantially azure light. Azure light has in fact been found to have an unusual ability to render metal surfaces, particularly stainless-steel surfaces, highly visible and to show up impurities on the surfaces extremely well. Even more advantageously, the illumination means 7 emit a suffused light, further increasing the positive effect of the azure light. This is very advantageous in environments which require a very high degree of air cleanliness, such as operating theatres and hospitals in general, semiconductor and microprocessor production plants, in the pharmaceutical field, etc.
- The inspection device 1 permits visual inspection of the interior of a conveyor duct in optimal light conditions both when the system is idle and when the system is in operation.
- Access to the interior of the conveyor duct through the inspection opening 8 is convenient and safe. The
edge 24 of thewall 4 of the duct is completely protected and reinforced by theframe 3, eliminating the risk of loss of pollutant substances and increasing the strength and life of the conveyor duct. - The interior of the conveyor duct can be illuminated both when the
inspection opening 8 is closed by theporthole element 2 and when it is open. - The releasable connection of the porthole element to the frame permits cleaning of the internal surface of the porthole element and easy replacement thereof, if necessary, thus ensuring maximum transparency of the porthole element and hence optimal visibility of the interior of the duct through the porthole element.
- The inspection device 1 is particularly suitable for use in conveyor ducts in critical environments such as hospitals, in the semiconductor and microprocessor industries, etc. where a high degree of air cleanliness is required. In fact, the device 1 permits both access to the interior of the duct for cleaning and maintenance operations and visual checking of the results of these operations, in very favourable conditions.
- Naturally, in order to satisfy contingent and specific requirements, a person skilled in the art may apply to the inspection device 1 according to the present invention further modifications and variations, all of which, however, are included within the scope of protection of the invention as defined by the appended claims.
Claims (17)
- An inspection device (1) for a conveyor duct for aeriform media, in particular for air, comprising a porthole element (2) of substantially transparent material and a frame (3) which can be connected to a wall (4) of the conveyor duct in the region of an access opening (6) provided in the wall (4), in a manner such that the porthole element (2) is superimposed on the access opening (6) and the access opening (6) is closed, characterized in that the device (1) comprises illumination means (7), directed towards the interior of the conveyor duct internally a space for housing illuminating means and suitable for illuminating a conveying space therein, to permit visual inspection thereof, both when the system is idle and when the system is in operation, wherein the inspection device delimits internally a space for housing the illumination means.
- A device (1) according to Claim 1 in which the porthole element (2) is connected to the frame (3) releasably, affording access to the interior of the duct through an inspection opening (8) delimited by the frame (3).
- A device according to Claim 1 or Claim 2 in which the porthole element (2) is connected to the frame (3) by threaded or bayonet means (10, 16).
- A device (1) according to Claim 2 or Claim 3, comprising stop means (18, 19) suitable for stopping the porthole element (2) relative to the frame (3) in a predetermined closure position.
- A device (1) according to Claim 4 in which the stop means (18, 19) are resiliently movable or deformable in order to bring about resilient and/or snap stopping of the porthole element (2) in the closure position.
- A device (1) according to any one of the preceding claims in which the illumination means (7) are associated with the frame (3).
- A device (1) according to any one of the preceding claims in which the illumination means (7) comprise an elongate lamp, preferably a fluorescent tubular lamp.
- A device (1) according to the preceding claim in which the tubular lamp extends in the vicinity of the periphery of the inspection opening (8).
- A device (1) according to Claim 8 in which the frame (3) delimits, by means of a transparent wall (20) facing towards the interior of the duct and an opaque wall (21) facing towards the exterior of the duct, a channel which extends substantially around the periphery of the inspection opening (8) and which houses the tubular lamp.
- A device (1) according to any one of the preceding claims in which the frame (3) has a substantially U-shaped peripheral portion (23) suitable for housing and protecting an edge (24) of the wall (4) delimiting the access opening (6).
- A device (1) according to any one of the preceding claims in which the frame (3) comprises an inner half-frame (3") to be associated with the wall (4) on the inside of the duct and an outer half-frame (3') to be associated with the wall (4) on the outside of the duct, the inner half frame (3'') and the outer half-frame (3') being connectible to one another by means of connection members (12), preferably threaded or snap connection members, to form the frame (3).
- A device (1) according to Claim 11 in which the frame (3) delimits internally a space for housing the illumination means (7), the space having an opening to permit the replacement of the illumination means (7), the opening being covered by the outer half-frame (3') so as to permit replacement of the illumination means (7) without removal of the inner half-frame (3'') from the wall (4) of the duct.
- A device (1) according to any one of the preceding claims, made of synthetic material, preferably polycarbonate with a glass content.
- A device according to any one of the preceding claims in which the illumination means emit a substantially azure light.
- A device according to any one of the preceding claims in which the illumination means emit a suffused light.
- A wall (4) for forming a conveyor duct for aeriform media, in particular air, comprising an access opening (6), in which the wall (4) is provided with an inspection device according to any one of the preceding claims.
- A conveyor duct for aeriform media, in particular air, comprising a wall (4) with an access opening (6), in which the conveyor duct comprises an inspection device according to any one of the preceding claims.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT02760559T ATE344427T1 (en) | 2002-08-06 | 2002-08-06 | INSPECTION DEVICE FOR A TRANSFER LINE OF A GASEOUS MEDIUM |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/IT2002/000523 WO2004013543A1 (en) | 2002-08-06 | 2002-08-06 | Inspection device for conveyor ducts for aeriform media |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1558878A1 EP1558878A1 (en) | 2005-08-03 |
EP1558878B1 true EP1558878B1 (en) | 2006-11-02 |
Family
ID=31198600
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02760559A Expired - Lifetime EP1558878B1 (en) | 2002-08-06 | 2002-08-06 | Inspection device for conveyor ducts for aeriform media |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1558878B1 (en) |
AU (1) | AU2002326150A1 (en) |
DE (1) | DE60215868D1 (en) |
WO (1) | WO2004013543A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2468907A (en) * | 2009-03-27 | 2010-09-29 | Clive James Berry | An improved access door for ductwork |
DE202011109291U1 (en) | 2011-12-20 | 2012-11-29 | Gert Bartholomäus | Fire damper with fasteners |
CH707889A1 (en) * | 2013-04-15 | 2014-10-15 | Rieter Ag Maschf | Filter device for a textile machine with a filter chamber. |
EP4354066A1 (en) * | 2022-10-14 | 2024-04-17 | BDR Thermea Group B.V. | Air guiding duct |
US11841160B1 (en) * | 2023-04-26 | 2023-12-12 | Christopher Mickey | Air handler coil access |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3782411A (en) * | 1972-06-30 | 1974-01-01 | United Mcgill Corp | Duct access section |
US4217930A (en) * | 1978-09-28 | 1980-08-19 | Charles Dallas | Venting port for shipping containers |
US4572240A (en) * | 1984-02-27 | 1986-02-25 | Philips Industrial Components, Inc. | Access door construction |
DE19654683A1 (en) * | 1996-12-31 | 1998-07-02 | Zubler Geraetebau | System for monitoring flow taking along objects especially labels in suction system |
-
2002
- 2002-08-06 AU AU2002326150A patent/AU2002326150A1/en not_active Abandoned
- 2002-08-06 DE DE60215868T patent/DE60215868D1/en not_active Expired - Lifetime
- 2002-08-06 EP EP02760559A patent/EP1558878B1/en not_active Expired - Lifetime
- 2002-08-06 WO PCT/IT2002/000523 patent/WO2004013543A1/en active IP Right Grant
Also Published As
Publication number | Publication date |
---|---|
DE60215868D1 (en) | 2006-12-14 |
EP1558878A1 (en) | 2005-08-03 |
AU2002326150A1 (en) | 2004-02-23 |
WO2004013543A1 (en) | 2004-02-12 |
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