JP2005081263A - Cleaning apparatus for inside of duct - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a cleaning apparatus for the insides of ducts permitting visual observation of the insides by displaying an image of the inside on a displaying mechanism. <P>SOLUTION: This apparatus 10 has an air-jetting means 13 inserted into the inside 30A of the duct in a freely movable way and jetting compressed air toward the inside wall of the duct 30, a compressed air generating means 11 supplying compressed air to the jetting means 13 through a flexible hose 21, an air-sucking means 20 sucking air in the inside 30A of the duct from a part other than the part from which the jetting means 13 is inserted, an image taking means 40 or a camera, for taking an image of at least a forward portion of the inside 30A in the progressing direction of the jetting means 13 and a displaying means 45 displaying the image taken by the image taking means 40. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a duct cleaning device that cleans the inside of a duct by jetting and sucking compressed air.

  Conventionally, in this type of cleaning device in a duct, for example, a moving wheel is attached to an expansion / contraction frame that can be extended and biased in the direction of the duct cross section via an extension actuator, and the cleaning device in the duct can travel in the duct with this moving wheel (Refer patent document 1). This telescopic frame is formed with a suction chamber part that directly or separately contacts the inner wall surface of the duct and inserts a rotating brush. A dust collection hose for sucking dust in the duct is connected to the suction chamber part. A suction means is connected.

Then, by moving the cleaning device in the duct by the drive device, the suction chamber traces the bottom surface or the entire inner wall surface of the duct to be cleaned, and dust is removed with a rotating brush and sucked with the dust collecting hose. Dust adhering to the entire bottom surface or inner wall surface was removed. Thereby, the dust adhering to the cleaning surface was removed without being scattered.
Japanese Patent Laid-Open No. 10-249297

  However, the conventional cleaning device in the duct moves the cleaning device in the duct provided with the driving device in the duct, and rotates the rotating brush on the bottom surface or the entire inner wall surface of the duct to remove the dust. I was sucking in with the dust collecting hose, but I couldn't see the image before cleaning in the duct and the image after cleaning. For this reason, there has been a problem that it cannot be determined whether or not the inside of the actually cleaned duct is still dirty.

  That is, the duct cleaning device of the present invention is movably inserted into a duct, and air blowing means for blowing compressed air toward the inner wall of the duct, and compressed air is supplied to the air blowing means by a flexible hose. Compressed air generating means to be supplied, air suction means for sucking air in the duct from a place other than the place where the air jetting means is inserted, and provided in the air jetting means, at least in the duct in the traveling direction of the air jetting means An image pickup means for picking up images and a display means for displaying an image picked up by the image pickup means are provided.

  In addition to the above, the in-duct cleaning device of the invention of claim 2 is characterized in that a space is provided between the imaging means and the traveling direction end of the air ejection means.

  In addition to the second aspect, the in-duct cleaning device of the third aspect of the invention is characterized in that a communication hole communicating with the hose is formed in the space portion.

  According to a fourth aspect of the present invention, there is provided the in-duct cleaning device according to the third aspect, wherein the communication hole is directed to the lens of the imaging means.

  According to a fifth aspect of the present invention, in the duct cleaning device according to the first, second, third, or fourth aspect, the imaging means and the display means are wirelessly connected.

  As described above in detail, according to the present invention, the air blowing means is movably inserted into the duct and blows the compressed air toward the inner wall of the duct, and the compressed air is supplied to the air blowing means by the flexible hose. Compressed air generating means to be supplied, air suction means for sucking air in the duct from a place other than the place where the air jetting means is inserted, and provided in the air jetting means, at least in the duct in the traveling direction of the air jetting means The image pickup means for picking up the image and the display means for displaying the image picked up by the image pickup means are provided, so that the image in the duct before cleaning is picked up by the image pickup means and displayed on the display means for visual recognition. Can do. Thereby, for example, it can be grasped how much dust is dirty in the duct. Therefore, since the dirt in the duct can be cleaned while visually recognizing with the display means, the dirt remaining in the duct can be prevented and reliably cleaned.

  In particular, since the inside of the duct after cleaning can be displayed on the display means, it becomes possible to grasp the dirt in the duct after cleaning. Thereby, the cleaning requester in the duct can visually recognize the cleaning state in the duct after cleaning, for example. Therefore, it is possible to greatly improve the reliability of the cleaning device in the duct to the requester of the cleaning in the duct, and it is possible to expect the widespread use of the cleaning device in the duct.

  According to the invention of claim 2, in addition to the above, since the space portion is provided between the image pickup means and the end portion in the traveling direction of the air ejection means, for example, as shown in claim 3, the space portion includes a hose. By forming the communication hole communicating with the opening, the compressed air from the air ejecting means can be injected into the space. Thereby, since a space part is satisfy | filled with the compressed air injected from the air ejection means, it can prevent that the dirt in a duct enters into a space part. Accordingly, it is possible to reliably prevent the imaging unit from being contaminated with dust in the duct, and when the inside of the duct is being cleaned or the state in the duct after cleaning is captured by the imaging unit and displayed on the display unit. Therefore, it becomes possible to always grasp the cleaning state and dirt state in the duct.

  According to the invention of claim 4, in claim 3, since the communication hole is directed to the lens of the imaging means, the compressed air from the air ejection means can be jetted toward the lens. Thereby, for example, even when the lens is contaminated with dust in the duct, the stain can be blown off by the jet pressure of the compressed air. This makes it possible to prevent the camera lens from being contaminated with dust even while the inside of the duct is being cleaned. Therefore, the trouble of wiping off the surface of the lens of the imaging means can be saved, and the convenience of the in-duct cleaning device can be greatly improved.

  According to the invention of claim 5, in claim 1, claim 2, claim 3, or claim 4, since the image pickup means and the display means are wirelessly connected, for example, the image pickup means and the display means are connected. This eliminates the need for electric wires. Thereby, the inside of the duct can always be displayed on the display means simply by attaching the camera to the air ejection means, and the structure of the air ejection means can be simplified. Therefore, it is possible to display the image in the duct on the display means wherever it is, and the cost of the duct cleaning device can be greatly reduced.

  In particular, since the image pickup means and the display means are wirelessly connected, it is possible to prevent inconvenience such as the electric wire being cut as when the image pickup means and the display means are connected by an electric wire. Accordingly, the convenience of the duct cleaning device can be further improved.

  The present invention provides a duct cleaning device that displays an image of an inner surface of a duct on a display means and visually recognizes the inside of the duct. For the purpose of being able to clean while visually checking the dirt in the duct, the air jetting means is provided with an imaging means for imaging the inside of the duct, and a display means for displaying an image captured by the imaging means is provided. It was realized.

  Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a schematic view of a building 35 provided with the in-duct cleaning apparatus 10 of the present invention, FIG. 2 is a schematic view of a duct 30 having the in-duct cleaning apparatus 10 of the present invention, and FIG. 3 is an in-duct cleaning apparatus of the present invention. 4 is a perspective side view of the air ejection means 13 of FIG. 3, and FIG. 5 is a plan sectional view of the air ejection means 13 of FIG.

  In these drawings, reference numeral 11 denotes compressed air generating means constituting the in-duct cleaning apparatus 10, 13 constituting the in-duct cleaning apparatus 10, air blowing means inserted into the end opening 31 of the duct 30, and 20 a duct. An air suction means 30 constituting the internal cleaning device 10 is a duct having a square cross section disposed in a building 35 such as a general household, a store, or a factory. It should be noted that a plurality of ducts 30 are provided and end portions open into the rooms of the building 35, and the ducts 30 are connected and communicated with each other. Further, it is assumed that the duct 30 has an end 31 opened outside the building 35 and sealed with a lid (not shown).

  Although not shown, the compressed air generating means 11 generates compressed air by rotating a compressor or a plurality of wings. The compressed air generating means 11 is a driving device (not shown) such as an engine or a motor. It is driven by. That is, the compressed air generating means 11 is constituted by a so-called generally used compressed air generating device that generates compressed air by driving a driving device. In addition, about the technique which generates compressed air with a compressed air generator, since it is a conventionally well-known technique, detailed description is abbreviate | omitted.

  The air jetting means 13 is connected to the compressed air generating means 11 through a flexible hose 12 that is not easily damaged by the compressed air of a predetermined pressure generated by the compressed air generating means 11 and air. The ejection means 13 is rotatably connected to the hose 12 (FIG. 3). Of course, the duct 30 is also configured so as not to be easily damaged by the compressed air of a predetermined pressure generated by the compressed air generating means 11.

  The air ejection means 13 includes a rotary joint 14, a cylindrical air injection device 15 rotatably connected to the rotary joint 14, and an imaging means. The rotary joint 14 includes a fixed member 14A and a rotary member 14B that is rotatably fitted to the fixed member 14A. The fixed member 14A and the rotating member 14B are configured to be smoothly rotatable by a bearing (not shown). The fixing member 14 </ b> A of the rotary joint 14 is configured to be detachable from the hose 12. Then, the fixing member 14 </ b> A of the rotating joint 14 is connected to the hose 12, whereby the rotating member 14 </ b> B is connected to the air injection device 15.

  The imaging means is a CCD (Charge Coupled Device) camera 40, that is, a camera 40 using a semiconductor light receiving element that converts light into an electrical signal, and a lens 40A is provided at the tip. The camera 40 is connected to display means 45 such as a cathode ray tube type display device or a liquid crystal display device. The camera 40 and the display unit 45 are wirelessly connected, and an image in the duct 30A captured by the camera 40 via the lens 40A is transmitted to the display unit 45 wirelessly. As a result, the image of the duct 30 </ b> A is displayed on the display means 45. In FIG. 1, the display unit 45 is installed in the vicinity of the compressed air generation unit 11. However, the display unit 45 can be visually recognized anywhere as long as the image captured by the camera 40 can be displayed on the display unit 45. It is easy to use.

  Although not shown, the camera 40 is provided with a storage battery for driving the camera 40, and the camera 40 images the inside 30 </ b> A of the duct by this storage battery and transmits the captured video signal to the display means 45. In this case, the camera 40 and the display means 45 may be connected by an electric wire, but the wireless connection is easier to use because the electric wire is not obstructed. The technique for transmitting the image captured by the camera 40 via the lens 40A to the display means 45 by wire or wirelessly is a well-known technique and will not be described in detail. In addition, since a technique for transmitting and projecting an image captured by the camera 40 via the lens 40A to the display means 45 is a known technique, a detailed description thereof will be omitted.

  Here, generally, no illumination is installed in the duct 30A, so that the camera 40 needs to illuminate the duct 30A in order to image the duct 30A. Therefore, the camera 40 is provided with a lighting device (not shown) at a position where the lens 40A is not directly illuminated. By illuminating the duct interior 30A with this illumination device, the duct interior 30A is clearly imaged and the display means 45 displays the duct interior 30A.

  Although not shown, the lighting device is provided with a storage battery for driving the lighting device, and the lighting device illuminates the inside 30A of the duct by this storage battery. In addition, when a illuminating device consumes a lot of electric power, you may use the commercial alternating current power supply (not shown) currently used in a general household, without using a storage battery. In this case, the lighting device is connected to a commercial AC power source with an electric wire (not shown) through a support member 41 and a side surface of the hose 12 described later.

  The camera 40 is fixed to a fixing member 14 </ b> A of the rotary joint 14, and the rotation axis of the rotary joint 14 is fixed to a support member 41 extending in the traveling direction of the air ejection means 13. The lens 40 </ b> A of the camera 40 is provided on the rotary joint 14 side with a predetermined dimension from the front end of the air ejection unit 13, and a space 43 is formed between the lens 40 </ b> A of the camera 40 and the front end of the air ejection unit 13. Is provided. The space 43 is expanded as it goes to the front end of the air ejection means 13 in the traveling direction.

  Accordingly, the camera 40 is configured to be able to image the duct 30A in a wide range with the camera 40 even from the back of the space 43, and by injecting the compressed air from the air ejection means 13 into the space 43, The space 43 is filled with compressed air, and dirt in the duct 30 </ b> A is prevented from entering the space 43. The camera 40 and the air ejection means 13 are connected via a ball bearing or the like (not shown), and the air ejection means 13 smoothly rotates around the support member 41 and the camera 40. That is, the camera 40 does not rotate, and the air injection device 15 rotates around the camera 40.

  In addition, a plurality of communication holes 44 (only one is shown in the embodiment) are formed in the air ejection means 13 (air ejection device 5) (FIG. 4). The communication hole 44 opens on one side into the hose 12 via the rotary joint 14 and communicates with the compressed air generating means 11 like the nozzle 16 described later. The other side of the communication hole 44 is directed toward the lens 40 </ b> A side of the camera 40. Thus, the compressed air from the compressed air generating means 11 is configured to be jetted onto the lens 40A of the camera 40 (FIG. 5).

  The air injection device 15 extends in the direction in which the duct 30 extends and is inserted into the duct 30A. The air injection device 15 substantially closes the duct 30A (in this case, the air injection means 13 is in the duct). In the state inserted in 30A, there is a predetermined gap between the air ejection means 13 and the duct 30), and the outer diameter is formed to be rotatable in the duct 30A.

  That is, the air injection device 15 is connected to the hose 12 so as to be rotatable by a rotary joint 14 as shown in FIG. 2, and is configured to be movable in the duct 30A. Is sucked, the air injection device 15 is configured to move to the air suction means 20 side by the suction force. The air injection device 15 has an outer diameter that can move even in a curved duct or a bent duct.

  The air injection device 15 is provided with a plurality of nozzles 16. These nozzles 16 are provided at substantially equal intervals in the circumferential direction around the air injection device 15, and extend in a predetermined radial direction with respect to the rotation of the rotary joint 14. Each nozzle 16 injects compressed air generated by the air jetting means 13, passes through the rotary joint 14 and the hose 12, and communicates with the compressed air generating means 11. In addition, although the nozzle 16 is provided in four places at substantially equal intervals in the circumferential direction around the air injection device 15, the nozzle 16 is not limited to this number, and may be provided in five places to ten places and four places or more. That's fine.

  Each nozzle 16 is provided at a different angle with respect to the extending direction of the duct 30 and at an angle at which compressed air is sprayed onto the inner wall of the duct 30 to remove dust. In this case, one nozzle 16 (nozzle 16 on the lower side in FIG. 4) is provided at an angle at which the compressed air can be injected at a substantially right angle toward the inner wall of the duct 30, and the nozzle 16 at the opposite position (the nozzle 16 on the upper side in FIG. 4). ) Is inclined at a predetermined angle in a direction away from the rotary joint 14. And the compressed air which flowed in into the air injection apparatus 15 from the hose 12 is injected from each nozzle 16 (FIG. 4 solid line arrow).

  In addition, one nozzle 16 (nozzle 16 on the upper side in FIG. 5) provided at a position orthogonal to both nozzles 16 and 16 in FIG. 4 is provided at a predetermined angle in the direction of the rotary joint 14, The nozzle 16 (nozzle 16 on the lower side in FIG. 5) at a position facing the nozzle 16 is at an angle closer to a right angle to the inner wall of the duct 30 than the nozzle 16 on the upper side in FIG. Inclined. And the compressed air which flowed in into the air injection apparatus 15 from the hose 12 is injected from each nozzle 16 (FIG. 5 solid line arrow). Although four nozzles 16 are provided at substantially equal intervals in the circumferential direction around the air injection device 15, the number of nozzles 16 may be five or five or more as needed. Further, the angle of the nozzle is not limited to the above angle, and may be any angle as required.

  When the compressed air generated by the compressed air generation means 11 passes through the hose 12 and is injected from each nozzle 16 provided in the air injection device 15 of the air injection means 13, the air injection device 15 rotates the rotary joint 14. It rotates in a predetermined direction as an axis (solid arrow in FIG. 6). That is, each nozzle 16 is oriented in a direction in which a predetermined angle is in contact with a circle around the rotation axis around which the air injection device 15 is rotated by the rotary joint 14 (for example, in FIG. 7, the air injection device 15 rotates each nozzle 16. (A direction around a rotation axis that rotates around the rotation axis).

  And the air injection apparatus 15 rotates counterclockwise by the reaction of the compressed air (FIG. 7 white arrow) injected from the nozzle 16 (solid line arrow of FIG. 7). The air injection device 15 is configured to rotate in a balanced state around the rotation axis of the rotary joint 14 by injecting compressed air from a plurality of nozzles 16. Further, the air injection device 15 is configured such that when compressed air is injected from a plurality of nozzles 16, the air injection device 15 rotates without hitting the inner wall of the duct 30 by the injection of the compressed air. The air injection device 15 configured as described above is configured to have a large outer diameter with a small gap between the inner wall of the duct 30 (FIG. 8).

  On the other hand, the end opening 31 of the duct 30 having a square cross section disposed in the building 35 (in this case, the opening 31 of the duct 30 other than the duct 30 into which the air blowing means 13 is inserted) is also flexible. One end portion of the suction hose 23 having the property is connected, and the air suction means 20 is connected to the other end portion of the suction hose 23. The air suction means 20 is composed of a compressor or a so-called vacuum device that sucks air by rotating a plurality of wings.

  Although not shown, the air suction means 20 sucks a predetermined amount of air in the duct 30A by rotating a compressor or a plurality of wings. That is, the air suction means 20 is air that passes through the gap between the air injection device 15 and the duct 30, air that passes through the through-hole 25 </ b> A provided in the closing member 25, and air that is injected from the air blowing means 13. Air combined with the air passing through the member 25 is sucked (solid line arrow and white arrow in FIG. 2).

  In this case, since the air injection device 15 is configured in a cylindrical shape with respect to the rectangular duct 30, the amount of air passing through the gap between the air injection device 15 and the duct 30 increases. A flexible shielding plate (not shown) smaller than the inner wall of the duct 30 is provided in the vicinity of the fixing member 14 </ b> A or the fixing member 14 </ b> A of the hose 12, and air passes through the gap between the air injection device 15 and the duct 30. The amount can be reduced. Thus, the duct 30 can be easily set to a predetermined low pressure. By configuring the shielding plate to be flexible, the air injection device 15 can be easily moved even in a curved duct or a bent duct.

  The air suction means 20 is driven by a drive device (not shown) such as an engine or a motor, similar to the compressed air generation means 11 described above. The air suction means 20 passes between through holes 25A of a plurality of closing members 25 described later and flows into the duct 30A between the duct 30 in which the air ejection means 13 is inserted and the air ejection means 13. An amount of air that passes and flows into the duct 30 </ b> A and an amount of air larger than the amount of air ejected from the air ejection means 13 can be sucked.

  Note that a technique for sucking air by the vacuum device is a well-known technique and will not be described in detail. The compressed air generating means 11 is provided with a filter 21 capable of removing dust and a suction device 22 having a plurality of wings. The filter 21 is formed of a net that allows air to pass but does not allow dust to pass. The filter 21 may be a cyclone type that captures dust by centrifugal force. Further, the duct 30 and the suction hose 23 are configured so as not to be deformed or damaged even when the internal air is sucked by the air suction means 20 and the inside becomes a predetermined low pressure.

  When cleaning the duct interior 30 </ b> A with the duct interior cleaning device 10, the air ejection means 13 connected to the flexible hose 12 is inserted into the duct interior 30 </ b> A from the opening 31 that opens to the outside of the building 35. The suction hose 23 is connected to the opening 31 of another duct 30 that opens to the outside. Further, the opening 30 of the duct 30 into which the air blowing means 13 is inserted and the opening 30 of the duct 30 other than the opening 31 of the duct 30 to which the suction hose 23 is connected are closed by the closing member 25. At this time, if the opening 31 is sealed with a lid, the lid is removed and closed with the closing member 25.

  Here, the closing member 25 is used to prevent the passage of air entering the duct 30A from the outside of the duct 30 or to adjust the amount of passage of air. The opening and closing can open and close the through hole 25A provided in the closing member 25. A plate 26 (corresponding to the adjusting means of the present invention) is provided. The opening / closing plate 26 is configured to be slidable or rotary, and by adjusting the opening of the through hole 25A with the opening / closing plate 26, the passage of air entering the duct 30A from the outside of the duct 30 is prevented, or Adjust the amount of air passing through.

  And if the drive device of the air suction means 20 is operated and air in the duct 30A is sucked, the duct 30A becomes a predetermined low pressure. When the pressure in the duct 30A reaches a predetermined low pressure, the driving device for the compressed air generating means 11 is operated next. The air compressed by the compressed air generating means 11 flows into the air ejecting means 13 via the hose 12 and is injected into the duct 30 </ b> A from each nozzle 16 of the air injection device 15. Moreover, since the inside 30A of the duct is set to a predetermined low pressure, the compressed air injected from each nozzle 16 into the inside 30A flows out of the duct 30 from each through hole 25A provided in the plurality of opening / closing plates 26. There is no.

  And when compressed air is injected from each nozzle 16, the rotation joint 14 rotates by reaction of the injected compressed air. The air injection device 15 rotates in a predetermined direction by the rotation of the rotary joint 14, and the air injection device 15 rotates in the direction of the air suction means 20 that sucks the air in the duct 30A (the white air near the air injection means 13 in FIG. 2). Move to the arrow). In this case, since the air injection device 15 is rotated by the injection of compressed air from a plurality of nozzles 16 without the air injection device 15 hitting the inner wall of the duct 30, the air suction means 20 side is located at the approximate center of the inside 30 A of the duct. Can be moved to. The air injection device 15 moves in the duct 30A toward the air suction means 20 if the hose 12 connected to the air injection means 13 is loosened, and the air injection means 13 moved toward the air suction means 20 is the hose. If 12 is pulled, it can be moved in the direction of pulling out from the duct 30A.

  Since the air ejection means 13 is provided with the camera 40, the cleaning status of the duct 30A can be displayed on the display means 45 and displayed. At this time, compressed air is ejected from each nozzle 16 of the air ejection means 13 and the dust in the duct 30A is blown away and rises, but the soared dust moves to the air suction means 20 side. Further, since the compressed air is injected from the communication hole 44 to the space portion 43 provided at the front end of the air blowing means 13, it is possible to prevent the soared dust from entering the space portion 43.

  Further, when the lens 40A of the camera 40 is contaminated with the dust that has risen for some reason, the communication hole 44 does not have to be cleaned after the air ejecting means 13 is once pulled out of the duct 30A and then the dirty lens 40A of the camera 40 is cleaned. Since the compressed air is injected toward the lens 40A, the lens 40A can be cleaned without pulling out the air blowing means 13 from the duct 30A. As a result, the duct 30A can be cleaned while the duct 30A is projected on the display means 45 thereafter.

  The compressed air ejected from each nozzle 16 is blown against the dust in the duct 30. Each nozzle 16 moves in the direction of the air suction means 20 while spraying compressed air at a different angle with respect to the extending direction of the duct 30, so that the inner wall of the duct 30 is compressed by the compressed air injected from each nozzle 16. Different parts are sprayed. And since the compressed air which blows off from the nozzle 16 while rotating is blown from the front and rear, right and left directions of the dust, the dust accumulated in the duct 30A and the dust which is stuck is blown away and rises. Thereby, dust stuck to the inner wall of the duct 30 is peeled off.

  The dust that has been blown off in the inside of the duct 30A and moved off is moved by the air suction means 20 toward the air suction means 20 side by the air suction means 20, and is captured by the filter 21 provided in the air suction means 20. Since a predetermined gap is provided between the air ejection means 13 (air injection device 15) and the duct 30, the dust that has risen in the duct 30A is caused by the air flowing into the duct 30A from this gap. It does not flow out to the opening side of the duct 30 in which the ejection means 13 is inserted. The dust that has been peeled off and blown up in the duct 30 </ b> A moves through the duct 30 </ b> A by the suction of the air suction means 20 and is captured by the filter 21. Since the pressure inside the duct 30A is lower than that outside the duct 30, the air outside the duct 30 flows into the duct 30A from the gap between the air injection device 15 and the duct 30.

That is, the air suction means 20 passes through the through holes 25 </ b> A of the plurality of closing members 25 and flows into the duct 30 </ b> A, and between the duct 30 in which the air ejection means 13 is inserted and the air ejection means 13. Since the amount of air flowing into the duct 30A and the amount of air larger than the amount of air ejected from the air ejecting means 13 is sucked, it is ejected from each nozzle 16 of the air ejecting device 15 and peeled off and blown away in the duct 30A. Dust can be captured by the filter 21 without flowing out of the duct 30 from between each of the through holes 25 </ b> A, the duct 30, and the air ejection means 13.

  Then, by adjusting the slack of the hose 12, the inside 30A of the duct from the opening 31 of the duct 30 into which the air blowing means 13 is inserted to the opening of the duct 30 to which the suction hose 23 of the air suction means 20 is connected is cleaned. Further, the air jetting means 13 is also inserted from the opening 31 of the other duct 30, and similarly, the duct 30 to which the suction hose 23 of the air suction means 20 is connected from the opening 31 of the duct 30 into which the air jetting means 13 is inserted. The inside of the duct 30A up to the opening is cleaned. Similarly, the remaining 30A inside the duct is cleaned. When the air ejection means 13 is pulled out from the duct 30A, the duct 30A can be displayed and displayed on the display means 45, so that it can be visually confirmed whether or not the cleaned duct 30A is cleanly cleaned. .

  As described above, the in-duct cleaning device 10 includes the camera 40 for imaging the inside 30A of the duct in the traveling direction of the air ejection means 13, and the display means 45 for displaying and displaying the video imaged by the camera 40. Therefore, the image in the duct 30A before the duct 30A is cleaned can be picked up by the camera 40 and displayed on the display means 45 for visual recognition. Thereby, it is possible to grasp how much dust is dirty in the duct 30 </ b> A, and thus it is possible to clean the duct 30 </ b> A while visually checking the state of the dirt in the duct 30 </ b> A.

  Further, since the inside 30A of the duct after cleaning can be displayed on the display means 45, it becomes possible to grasp the dirt in the inside 30A of the duct after cleaning. Thereby, the cleaning requester of the duct 30A can visually recognize the cleaning state of the duct 30A after cleaning, and the duct cleaning device 10 is greatly improved in reliability to the cleaning client of the duct 30A. It becomes possible.

  Further, since the space portion 43 is provided between the camera 40 and the end portion in the traveling direction of the air ejecting means 13 and the communication hole 44 communicating with the hose 12 is formed in the space portion 43, the air ejecting means 13 The compressed air can be injected from the space 43. Thereby, since the space part 43 will be filled with the compressed air injected from the air ejection means 13, it can prevent that the stain | pollution | contamination of 30A in a duct enters the space part 43, and adheres to the lens 40A. In addition, it is possible to reliably prevent the camera 40 from being contaminated with dust in the duct 30A. As a result, when the inside 30A of the duct is being cleaned or the state of the inside 30A of the duct after cleaning is imaged by the camera 40 and displayed on the display means 45, the cleaning state and the dirt state of the inside 30A of the duct can be always grasped. become.

  Further, since the communication hole 44 is directed toward the lens 40A of the camera 40, the compressed air from the air ejection means 13 can be ejected toward the lens 40A. Thereby, for example, even when the lens 40 </ b> A is soiled with dust in the duct 30 </ b> A, the soil can be blown off with the jet pressure of the compressed air. Accordingly, it is possible to prevent the lens 40A of the camera 40 from being contaminated with dust even while the duct 30A is being cleaned, and it is possible to save troubles such as wiping the surface of the lens 40A of the camera 40.

  Further, since the camera 40 and the display unit 45 are wirelessly connected, a video transmission wire for connecting the camera 40 and the display unit 45 and a wire for driving the camera 40 become unnecessary. As a result, the duct 30A can always be displayed and displayed on the display means 45 simply by attaching the camera 40 to the tip of the air ejection means 13, and the structure of the air ejection means 13 can be greatly simplified. Therefore, it is possible to project the image in the duct 30A anywhere on the display means 45, and the cost of the duct cleaning device can be greatly reduced.

  In particular, since the camera 40 stage and the display means 45 are wirelessly connected, it is possible to prevent inconveniences such as wire breakage as in the case where the camera 40 to the display means 45 are connected by an electric wire.

  Next, FIG. 9 shows an in-duct cleaning device 10 according to another embodiment of the present invention. In this case, the in-duct cleaning device 10 is used for cleaning the duct 30 having a substantially rectangular cross section, and the in-duct cleaning device 10 includes a plurality of air ejection means 13. Further, in the duct cleaning device 10, the air ejection means 13 includes an imaging means and a display means 45 that displays an image captured by the imaging means, as described above. That is, the duct cleaning device 10 is provided with the branch hose 17 between the hose 12 and the air ejection means 13. The branch hose 17 is configured such that a plurality of air ejection means 13 (two air ejection means 13 in the embodiment) can be connected to the hose 12. The branch hose 17 has flexibility similar to the hose 12 and is continuously branched into two from the connection portion 17A connected to the hose 12, and connection portions 17B and 17B are provided.

  That is, one side of the branch hose 17 is provided with a connection portion 17A that can be connected to the end of the hose 12, and the other side is branched and connected to the fixing member 14A of the rotary joint 14 of the air ejection means 13. Connection portions 17B and 17B are provided. And the connection part 17A of the branch hose 17 is connected to the hose 12, and the fixing member 14A of the rotary joint 14 of the air ejection means 13 is connected to the two branched connection parts 17B and 17B, respectively. Others are the same as described above.

  In this case, as described above, the amount of air passing through the gaps between the plurality of air ejection means 13 and the duct 30, the amount of air passing through the through hole 25 </ b> A provided in the closing member 25, and the plurality of air ejection means 13 are injected. Of course, the amount of air sucked by the air suction means 20 is made larger than the amount of air that is the sum of the amount of air and the amount of air passing through the closing member 25. Also in this case, a flexible shielding plate (not shown) smaller than the inner wall of the duct 30 is provided in the vicinity of the fixing member 14A of the branch hose 17 as described above, and passes through the gap between the air injection device 15 and the duct 30. You can reduce the amount of air to be used.

  The in-duct cleaning device 10 is provided with a support plate 27 for adjusting both the air injection devices 15 and 15 to a predetermined interval in accordance with the width of the horizontally long substantially rectangular duct 30. The support plate 27 is formed in a vertically long and substantially rectangular shape with a lightweight metal plate such as aluminum having a predetermined thickness. The support plate 27 has a size that does not protrude from both the air injection devices 15 and 15 in a state where the air injection devices 15 and 15 described later are brought closest to each other. The support plate 27 is provided with an adjustment groove 28 extending from one end to the other end in the longitudinal direction. The adjustment groove 28 passes through the front and back of the support plate 27 and is provided in the vicinity of both sides ( FIG. 10). The support plate 27 may be a synthetic resin plate instead of a lightweight metal plate).

  Further, the support plate 27 is provided with a hose hole 27A through which the connection portion 17B of the branch hose 17 can be inserted and the connection portion 17B can be moved in the longitudinal direction of the support plate 27. The hose hole 27A penetrates the front and back of the support plate 27 and is provided in the vicinity of both ends in the longitudinal direction of the support plate 27. The air injection devices 15 and 15 described later are in the closest state and the most separated state. The connecting portion 17B of the branch hose 17 is formed in a long hole that does not contact.

  Then, the adjustment groove 28 provided in the support plate 27 is aligned with a pair of screw holes (not shown) provided in advance in the fixing member 14A, and when the bolt 29 is screwed into the screw hole, the support plate 27 is engaged with the fixing member 14A. Is fixed. When the air injection devices 15 and 15 are fixed to the support plate 27, the fixing member 14A of the rotary joint 14 of the air ejection means 13 is then connected to both the connection portions 17B and the connection portion 17B. In this case, the cameras 40 are provided on both the air ejection means 13, but only the image of one of the cameras 40 may be displayed on the display means 45, and the images of both the cameras 40 are divided by dividing the screen into left and right or top and bottom. You can display images at the same time. Note that the camera 40 may be provided only in one of the air ejection means 13.

  When cleaning the inside of the duct 30A having a narrow cross-sectional width, the fixed bolts 29 are loosened, and both the air ejection means 13 and 13 are set to a predetermined narrow dimension (in this case, the both air ejection means 13 and 13 If the loosened bolts 29 are tightened and fixed in accordance with the approach, the air jetting means 13 and 13 can be narrowed to a predetermined dimension (arrows in FIG. 10). Thereby, since the air ejection means 13 and 13 can be made to approach the inner wall of the duct 30A having a narrow cross-sectional width, the duct 30A can be cleanly cleaned with the compressed air ejected from each nozzle 16 as described above. it can.

  Further, when cleaning the inside of the duct 30A having a wide cross-sectional width, the fixed bolts 29 are loosened, and both the air ejecting means 13, 13 are set to a predetermined wide dimension (in this case, the both air ejecting means 13, 13). If the loosened bolts 29 are tightened and fixed in accordance with the distance, the air ejection means 13 and 13 can be widened to a predetermined dimension (arbitrary dimensions) (arrows in FIG. 11). Thereby, since the air ejection means 13 and 13 can be made to approach the inner wall of the duct 30 with a wide cross-sectional width, the duct 30A can be cleaned cleanly with the compressed air injected from each nozzle 16 as described above. it can.

  Thus, the duct cleaning device 10 is provided with the branch hose 17, the hose 12 is connected to the connection part 17 </ b> A on one side of the branch hose 17, and the air ejection means 13 is connected to the branched connection parts 17 </ b> B and 17 </ b> B, respectively. 13, even if the cross-section of the duct 30 is a horizontally long substantially rectangular shape, it is stuck to the inner wall surface of the duct 30 with the compressed air (the white arrow in FIG. 12) injected from the plurality of air ejection means 13, 13. Dust can be removed.

  And the dust which peeled off is attracted | sucked to the air suction means 20 side, is caught with the filter 21, The duct 30A from the air ejection means 13 and 13 side inserted in the duct 30A to the air suction means 20 is imaged with the camera 40 Cleaning can be performed while displaying the inner 30A on the display means 45. Since the branch hose 17 is flexible, the air suction means 13 and 13 can be connected to the air suction means by suction of air by the air suction means 20 even in a curved duct or a bent duct. It can be moved to the 20 side. In addition, since the duct interior 30A can be cleaned while visually recognizing the duct interior 30A captured by the camera 40 with the display means 45, the same effect as described above can be obtained.

  Next, FIG. 13 shows an in-duct cleaning apparatus 10 according to another embodiment of the present invention. In this case, the air ejection means 13 which comprises the duct cleaning apparatus 10 is comprised in the substantially spherical shape. The duct cleaning device 10 is also provided with an image pickup means on the air ejection means 13 and a display means 45 for displaying an image picked up by the image pickup means, as described above. That is, the air ejection device 15 of the air ejection means 13 is formed in a substantially spherical shape, and a rotary joint 14 is provided on one side of the air ejection device 15, and a plurality of nozzles 16 are provided in the air ejection device 15. A hose 12 is connected to the rotary joint 14, and the hose 12 is connected to the compressed air generating means 11.

  The nozzle 16 is provided on the separated side of the hose 12 with respect to the position where the spherical air injection device 15 contacts the duct 30. As a result, the compressed air injected from the nozzle 16 is prevented from blowing out to the opening 31 side of the duct 30. Also in this case, the camera 40 is provided in the air ejection means 13 as described above. In addition, what is shown with the code | symbol similar to the above-mentioned is comprised similarly to the above-mentioned.

  Thus, since the air injection device 15 is formed in a substantially spherical curve, the periphery of the air injection device 15 can be brought into line contact with the inner wall of the duct 30 even when the air injection device 15 is inclined. As a result, even in a curved duct or a complicatedly bent duct 30A, the air ejection means 13 can be moved to the air suction means 20 side very smoothly by the air suction by the air suction means 20. Further, even if there is unevenness or a step (connection location) in the duct 30A, the air injection device 15 is configured in a substantially spherical shape, so that it can be smoothly moved without being caught. Thereby, it is possible to clean the duct 30 </ b> A imaged by the camera 40 from the air ejection means 13 side to the air suction means 20 side while displaying it on the display means 45. As a result, the same effect as described above can be obtained.

  In the embodiment, the in-duct cleaning device 10 is applied to the rectangular or horizontally elongated duct 30. However, the in-duct cleaning device 10 is not limited to this and may be used for a cylindrical duct. In this case, in particular, if a spherical air jetting device 15 constituting the air jetting means 13 is used, the gap between the duct and the air jetting device 15 can be narrowed, so the air passing through the duct inner wall and the jetting device 15 can be reduced. The amount can be reduced. Thereby, since the driving force of the suction device 22 can be reduced, the cost and energy saving of the duct cleaning device 10 can be achieved.

It is a schematic diagram of the building provided with the in-duct cleaning device of the present invention (Example 1). It is a schematic diagram of the duct provided with the cleaning apparatus in a duct of this invention (Example 1). (Example 1) which is a perspective view of the air ejection means which comprises the in-duct cleaning apparatus of this invention. FIG. 4 is a longitudinal side view of the air ejection means of FIG. 3 (Example 1). (Example 1) which is a plane sectional view of the air ejection means of FIG. (Example 1) which is a perspective view of the air ejection means rotated with the compressed air injected from the nozzle. (Example 1) which is a vertical side view of the air ejection means of FIG. It is a vertical side view of the air ejection means which shows the state which is cleaning the inside of a duct (Example 1). It is a top view of another cleaning apparatus in a duct (Example 2). FIG. 10 is a view taken along the line A-A in FIG. 9 (a state in which the air ejecting means is brought close) (Example 2). FIG. 10 is a view taken along the line AA in FIG. 9 (a state in which the air ejection means is separated) (Example 2). (Example 2) which is a vertical side view of the air ejection means of FIG. 9 which shows the state which injected compressed air in the duct and is cleaned. It is a side view of another cleaning apparatus in a duct (Example 3).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Duct cleaning apparatus 11 Compressed air generation means 12 Hose 13 Air ejection means 14 Rotating joint 14A Fixed member 14B Rotating member 15 Air injection device 16 Nozzle 17 Branch hose 17A Connection portion 17B Connection portion 20 Air suction means 21 Filter 22 Suction device 23 Suction hose 25 Closing member 25A Through hole 26 Opening and closing plate 27 Support plate 27A Hose hole 28 Adjustment groove 29 Bolt 30 Duct 30A Duct 31 Opening 35 Building 40 Camera 40A Lens 41 Support member 43 Space portion 44 Communication hole 45 Display means

Claims (5)

An air ejection means that is movably inserted into the duct and ejects compressed air toward the inner wall of the duct;
Compressed air generating means for supplying compressed air to the air ejection means with a flexible hose;
An air suction means for sucking air in the duct from a place other than the place where the air ejection means is inserted;
An imaging unit provided in the air ejection unit, and at least imaging the inside of the duct in the traveling direction of the air ejection unit;
A duct cleaning apparatus comprising: display means for displaying an image picked up by the image pickup means.   The in-duct cleaning device according to claim 1, wherein a space portion is provided between the imaging unit and the end portion in the traveling direction of the air ejection unit.   The in-duct cleaning device according to claim 2, wherein a communication hole communicating with the hose is formed in the space portion.   The in-duct cleaning device according to claim 3, wherein the communication hole is directed to a lens of the imaging means.   The in-duct cleaning device according to claim 1, 2, 3, or 4, wherein the imaging unit and the display unit are wirelessly connected.

Images