JP2005185896A - Apparatus for removing dust and dirt - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an epoch-making apparatus for removing dust and dirt exhibiting an unprecedented action effect. <P>SOLUTION: This apparatus for removing the dust and dirt for removing the dust and dirt D adhering to a grill body 3 arranged at a ventilation opening part 2 such as an air outlet port, an air inlet port mounted on a duct 1 of an air conditioner, or the like, is provided with a box shaped body 4 having an inner space S abutting on the grill body 3, the ventilation opening part 2 or the periphery thereof in an airtight condition and blocking the ventilation opening part 2, when the ventilation opening part 2 is blocked by the box shaped body 4, comprises allowing an inner pressure of the duct 1 and an inner pressure of the inner space S of the box shaped body 4 to mutually become a roughly similar pressure condition, and the inner space S of the box shaped body 4, is provided with dust and dirt separation means 6 for separating the dust and dirt D adhering to the grill body 3 from the surface of the grill body 3 and an air suction means 7 for sucking air in the inner space S. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a dust removing device.

  Conventionally, air conditioning equipment installed in clean rooms where clean environments are required, such as electronic and precision parts manufacturing factories and food processing factories, has a feeding duct that sends clean air pumped from an air purifier, A return duct that sucks out air from the room is arranged in the facility. The feed duct is provided with an air outlet (vent) that communicates with the room, and the return duct has an air inlet (vent) that communicates with the room. Mouth).

  Therefore, this air-conditioning equipment supplies clean air from the feed duct to the room through the air outlet, and sucks out indoor air (air containing dust) from the suction port to replace the room air. , You can always keep the room clean.

  By the way, when this air-conditioning equipment is used for a long period of time, dust contained in the air adheres to the grill body disposed in the suction port on the side for sucking out indoor air. The grill body generally has a structure in which a fin member for adjusting the air direction and a shutter member for adjusting the air volume are provided in a erected state on a frame having a frontal view shape. In addition to exerting the function of adjusting the wind direction and the air volume, it also exerts a makeup function that makes the inside of the vent portion difficult to see.

  Therefore, in the prior art, when removing dust adhered to the grill body, a scaffold 51 is assembled as shown in FIG. 13, and the operator removes the grill body 3 on the scaffold 51 and performs manual work. The dust D adhering to the surface of the grill body 3 is removed.

  However, this conventional removal method (hereinafter referred to as the conventional method) has the following problems.

  That is, in the conventional method, as described above, since the operator removes or attaches the grill body 3, the dust D adhering to the grill body 3 is scattered around, and thus a clean environment is maintained. The problem is above, and the work efficiency is extremely poor because the surrounding area needs to be separately cleaned after the grill body 3 is cleaned.

  In the conventional method, the removal operation is usually performed during the operation of the air-conditioning equipment, so that the productivity in the room is not hindered. When cleaning the grill body 3 to be provided, when the grill body 3 is removed, the massive dust D adhering to the grill body 3 is sucked in as it is, and a large amount of dust D at a time. May be adversely affected by air conditioning equipment (air purifier).

  In addition, the work for removing dust adhering to the grill body is a work at a high place, which is associated with the risk of personal injury.

  The present applicant pays attention to the above-mentioned problems and repeatedly conducts various experiments and researches, and as a result, has developed an epoch-making dust removing device that exhibits unprecedented effects.

  The gist of the present invention will be described with reference to the accompanying drawings.

  A dust removing device for removing dust D attached to a grill body 3 disposed in a vent 2 such as an air outlet or a suction port provided in a duct 1 of an air conditioner or the like, wherein the dust body 3 or A box-shaped main body 4 having an inner space S that closes the vent opening 2 is provided in contact with the vent opening 2 or its peripheral portion in an airtight state, and the vent opening 2 is blocked by the box-shaped main body 4. At this time, the internal pressure of the duct 1 and the internal pressure of the internal space S of the box-shaped main body 4 can be made substantially the same, and the internal space S of the box-shaped main body 4 includes the grill body 3. According to the dust removing device, dust separating means 6 for separating the attached dust D from the surface of the grill body 3 is provided, and air suction means 7 for sucking air in the inner space S is provided. Is.

  2. A member having an appropriate flexibility is disposed on the abutting portion 5 of the box-shaped main body 4 that abuts on the grill body 3 or the vent opening 2 or its peripheral portion. This relates to the dust removing apparatus described.

  Further, the dust separating means 6 is configured such that a rod-like body 9 having an abutting body 8 that abuts against the grill body 3 at the front end portion is rotatably provided in the inner space S of the box-shaped main body 4. The rod-shaped body 9 is configured to rotate so that the dust D attached to the grill body 3 can be separated from the surface of the grill body 3 by the contact body 8 provided on the rod-shaped body 9. It concerns on the dust removal apparatus of any one of Claims 1-3 characterized by these.

  4. The dust removing device according to claim 3, wherein the rod-like body 9 is configured to extend until the abutting body 8 abuts on the grill body 3.

  Further, a ventilation portion 10 is provided in the longitudinal direction inside the rod-like body 9, and air is sent to the ventilation portion 10 from an air feeding portion 11 connected to the base end portion of the rod-like body 9. An injection nozzle portion 12 for injecting air that has been passed through the ventilation portion 10 and pumped to the distal end side of the rod-shaped body 9 is provided at the distal end portion of the rod-shaped body 9, and the injection direction of the injection nozzle portion 12 is The dust removing device according to any one of 3 and 4, wherein the dust removing device is set in a direction in which air is jetted toward a base end side of the rod-like body 9.

  Further, the box-shaped main body 4 is configured to be movable up and down via an elevating device 13, and an operating portion 14 capable of operating the elevating device 13 is provided at a lower portion of the elevating device 13, the operating portion 14 being The dust removing device according to any one of claims 1 to 5, wherein the dust separating means 6 and the intake means 7 are configured to be operable.

  Since the present invention is configured as described above, unlike the above-described conventional method, for example, an epoch-making effect that is unprecedented, such as being able to quickly and satisfactorily remove dust without stopping production activities. It becomes a typical dust removing device.

  Embodiments of the present invention that are considered suitable (how to carry out the invention) will be briefly described with reference to the drawings, illustrating the operation of the present invention.

  In the present invention, for example, when removing dust D adhering to the grill body 3 disposed in the vent portion 2, the box-shaped main body 4 is brought into contact with the grill body 3 or the vent opening 2 or its peripheral portion in an airtight state. In this state, the dust D attached to the grill body 3 is separated from the surface of the grill body 3 by the dust separating means 6, and the air in the inner space S of the box-shaped main body 4 is sucked by the intake means 7.

  At this time, the dust D separated from the grill body 3 is sucked by the suction means 7 and is carried to a predetermined location, and the box-shaped main body 4 is placed on the grill body 3 or the ventilation opening 2 or its peripheral portion. Since it is in contact with the airtight state, the dust D is not scattered around the box-shaped main body 4 and is surely sucked by the intake means 7.

  Therefore, since the grill body 3 or the ventilation opening 2 or its peripheral portion is covered with the box-shaped main body 4, it is possible to reliably prevent dust separated from the grill body 3 from being scattered around. Good dust removal operation can be performed.

  Further, the present invention can be used, for example, in a state where the air conditioning equipment is operated, and can be cleaned while maintaining the clean state of the clean room. In particular, the present invention is disposed in the vent portion 2 as a suction port. This is effective in removing dust adhering to the grill body 3 to be applied.

  That is, the present invention has a configuration in which the box-shaped main body 4 is brought into contact with the grill body 3 or the vent opening 2 or its peripheral portion in an airtight state to close the vent hole portion 2 in use. The internal pressure and the internal pressure of the internal space S of the box-shaped main body 4 are configured to be in substantially the same pressure state.

  That is, in this case, since the internal pressure of the duct 1 in the reduced pressure state and the internal pressure of the internal space S of the box-shaped main body 4 are substantially the same pressure state, the suction direction is placed in the duct 1 and the internal space S of the box-shaped main body 4. As a result, the dust D separated from the grill body 3 moves in the suction direction by the air intake means 7, so that the dust separated from the grill body 3 even when the air conditioning equipment is in operation. D is not sucked into the duct 1 as it is, but is surely sucked by the suction means 7 and the dust D is carried to a predetermined location.

  Therefore, it is possible to reliably prevent a problem that a large amount of dust D is sucked at a time as in the conventional method described above, which adversely affects the air conditioning equipment (air purifier).

  Specific embodiments of the present invention will be described with reference to the drawings.

  The present embodiment is for removing dust D adhering to a grill body 3 disposed in a vent portion 2 such as an air outlet or a suction port provided in a duct 1 of an air conditioner or the like. A dust separating means 6 for separating dust D adhering to the grill body 3 from the surface of the grill body 3 and an intake means 7 for sucking air in the inner space S of the box body 4 Is provided. In the present embodiment, as the grill body 3 disposed in the vent portion 2, the fin member 3b for adjusting the air direction to the frame body 3a having a front view shape and the shutter member 3c for adjusting the air volume are used. However, the present invention is not limited to this structure. For example, a grill body 3 of a type in which only the fin member 3b is installed may be used. The arrangement body disposed in the vent portion 2 that exhibits the function of adjusting the wind direction and the amount of air and the function of making up the vent portion 2 is widely meant.

  Hereinafter, each component according to the present embodiment will be described in detail.

  The box-shaped main body 4 is formed in a box shape having an inner space S by connecting appropriate metal plate materials as shown in FIGS. 1 to 4. Specifically, the top plate portion 4 a, It consists of a bottom plate portion 4b, a left side plate portion 4c, a right side plate portion 4d, and a back plate portion 4e, and is provided so as to have a rectangular opening 5 in the front. The opening area of the opening 5 is appropriately designed in consideration of various sizes of the grill body 3 proposed.

  Further, the box-shaped main body 4 is configured as an abutting portion in which the front opening 5 abuts on the grill body 3 or the ventilation opening 2 or its peripheral portion in an airtight state.

  Specifically, in the present embodiment, a member (magnet sheet 16) having moderate flexibility and moderate magnetism is disposed at the opening end 5a of the box-shaped main body 4.

  Therefore, when the opening 5 of the box-shaped main body 4 is brought into contact with a contact portion, for example, the grill body 3, the contact is reliably made in an airtight state according to the unevenness of the surface of the frame body 3 a related to the grill body 3. In addition, it is adsorbed to the metal grill body 3, and thus a good airtight state can be obtained. The airtight state referred to in the present invention does not indicate an airtight state in a strict sense, but the main point is that when the box-shaped main body 4 is brought into contact with the grill body 3 or the ventilation opening 2 or its peripheral portion, dust This is an airtight state to the extent that scattering around D can be prevented, and the internal pressure of the duct 1 and the internal pressure of the internal space S of the box-shaped main body 4 can be made substantially equal.

  The opening 5 of the box-shaped main body 4 may be formed of a magnetic material for the opening 5 related to the box-shaped main body 4 in addition to the above-described attracting means by the magnet sheet 16 or an adhesive material may be used for the opening 5. It may be disposed, and may not be necessarily configured to exhibit an adsorption action, but may be configured to abut against the grill body 3 or the ventilation opening 2 or its peripheral portion in an airtight state.

  The box-shaped main body is partitioned into a plurality of regions (a plurality of regions are formed around the inner space S), and air suction means 7 and dust separation means 6 are provided in each region. It has been.

  Specifically, as shown in FIGS. 2 to 4, the air intake means 7 is provided with a partition plate 17 on the inner bottom surface portion of the box-shaped main body 4 to form a first region S1 partitioned from the inner space S. The compressor 18 is disposed in the first region S1, and a hole 17a is formed in the partition plate 17. The impeller 18a of the compressor 18 is rotated to decompress the first region S1. Thus, the air in the inner space S can be sucked into the first region S1 (see FIG. 3).

  Accordingly, the first region S1 is configured as a dust storage space for storing the dust D contained in the air sucked from the inner space S. Reference numeral 19 denotes a filter. Accordingly, clean air from which the dust D is removed is supplied to the second region S2, which will be described later.

  Further, the box-shaped main body 4 has a second region S2 and a third region S3 formed by two partition plates 20 and 21 disposed on the inner and rear surfaces thereof. The first region S1 and the hole 17b communicate with each other, and the second region S2 is configured to be supplied with exhaust air generated by the operation of the compressor 18 described above (see FIG. 4). . This is the air feeding portion 11 as referred to in the claims.

  The dust separating means 6 is configured by rotatably providing a rod-like body 9 having a contact body 8 to be brought into contact with the grill body 3 at the tip portion in the inner space S of the box-shaped main body 4. By rotating the body 9, the abutting body 8 provided on the rod-shaped body 9 is configured so that the dust D attached to the grill body 3 can be separated from the surface of the grill body 3.

  Specifically, as shown in FIG. 2, a plurality of driving devices 22 (motors) are arranged in parallel in the third region S <b> 3, and a rod-like body 9 is projected from each driving device 22.

  As shown in FIGS. 5 to 10, the rod-shaped body 9 is provided with a fixed pipe 23 fixed to the partition plate 20, and a rotation pipe provided in the fixed pipe 23 in a state of being inserted and protruding from the driving device 22. A moving shaft 24, a cylindrical moving body 25 that is fitted on the rotating shaft 24 so as to be freely screwed and provided with a contact body 8 at a tip end portion thereof, and a tip end portion fixed to the moving body 25, the fixing The moving pipe 26 is fitted and connected to the pipe 23.

  The fixed pipe 23 is formed of an appropriate metal member, and is provided in a penetrating manner in the partition plate 20, so that the base end portion is configured to open to the second region S2. .

  Therefore, the air pressure-fed from the second region S <b> 2 (air feeding part 11) is supplied into the inner hole 23 a of the fixed pipe 23.

  The rotation shaft 24 is formed of an appropriate metal member, and is connected to the drive portion 22a of the drive device 22 so as to be rotatable. The second region S2 on the rotation shaft 24 is provided. A vane plate 31 is attached to the base end portion arranged in the base plate. This vane plate 31 is used to satisfactorily supply the air fed through the second region S2 into the hole 23a of the fixed pipe 23 (see FIG. 7).

  Further, the rotating shaft 24 has a thread groove 24a formed at a portion to be fitted into the fixed pipe 23, and a cylindrical moving body 25 is fitted and connected to the thread groove 24a. Reference numeral 24b denotes a stopper portion for preventing the moving body 25 from coming off.

  This moving body 25 is formed of an appropriate metal member, and is provided in a state where it is fitted into the fixed pipe 23. Between the outer peripheral surface of this moving body 25 and the inner peripheral surface of the fixed pipe 23, A spacer 27 is disposed, and a predetermined gap 10 a is formed between the outer peripheral surface of the moving body 25 and the inner peripheral surface of the fixed pipe 23. The gap 10a is configured to function as a part of a ventilation portion 10 to be described later of the rod-like body 9.

  Further, the movable body 25 is provided with a fitting portion 25a to be fitted into the screw groove portion 24a of the rotating shaft 24 at the base end portion, and this fitting portion 25a has a slight gap with respect to the screw groove portion 24a. The frictional resistance is reduced as much as possible by being provided so as to be screwed in, and when the rotating shaft 24 is rotated, it rotates in the same direction as the rotating shaft 24. However, it is configured to move in the length direction of the rotating shaft 24.

  Therefore, the moving body 25 moves forward and backward in the length direction of the rotating shaft 24 (front and rear direction of the box-shaped main body 4) by rotating the rotating shaft 24 in the opposite direction. The rotating shaft 24 rotates in the same direction as the rotating direction. The forward movement of the moving body 25 and the rotation in the opposite direction of the forward / reverse direction function as the forward movement of the rod-like body 9 in the opposite direction of the forward / backward direction.

  Further, the moving body 25 is provided with a contact body 8 at the tip thereof.

  As shown in FIG. 9, the contact body 8 is configured by a large number of bristle members 8 a protruding in a dense state on the peripheral surface of a connecting member 8 b that is detachable from the distal end portion of the moving body 25.

  Accordingly, the abutting body 8 moves forward and backward in the front-rear direction of the box-shaped main body 4 as the moving body 25 moves forward and backward, and rotates in the rotating direction of the moving body 25. The contact body 8 can separate the dust D adhering to the surface of the grill body 3 by sweeping (scraping it off).

  Further, the moving body 25 has a moving pipe 26 connected to the tip thereof.

  The moving pipe 26 is formed of an appropriate metal member, and the distal end of the moving pipe 25 is movably (slidably) fitted to the fixed pipe 23 via the connecting member 28. It is connected to.

  The connecting member 28 is a bottomed cylindrical body having a diameter larger than that of the moving pipe 26, and is fitted and connected to the distal end portion of the moving pipe 26. The connecting portion 28a with the moving pipe 26 has an opening 12 therein. Is formed.

  The opening portion 12 is configured as an injection nozzle portion 12 that injects air that has passed through a ventilation portion 10 (described later) provided in the rod-shaped body 9, and the injection nozzle portion 12 is directed toward the proximal end side of the rod-shaped body 9. Thus, the air is turned back and jetted in the direction opposite to the direction passing through the ventilation portion 10 (see FIG. 9).

  Therefore, when the rod-shaped body 9 is rotated while air is jetted from the jet nozzle portion 12, a spiral swirl airflow (spiral airflow) is formed in the inner space S, and the swirl airflow is put on the swirl airflow. The dust can be sucked by the suction means 6 (see FIG. 11). In consideration of this point, in this embodiment, the jet nozzle portion 12 is in a direction opposite to the direction of rotation of the rod-shaped body 9 (the direction of arrow a in FIG. 10) so that the swirling airflow is easily generated during the dust D removing operation. (See FIG. 10).

  The connecting member 26 is provided with a moving body 25 penetrating at the bottom thereof, and a predetermined gap is provided between the outer peripheral surface of the moving body 25 and the inner peripheral surface of the moving pipe 26 via the connecting member 26. 10b is formed.

  Therefore, the rod-shaped body 9 includes the gap 10b between the outer peripheral surface of the moving body 25 and the inner peripheral surface of the moving pipe 26, the inner hole 23a of the fixed pipe 23 and the inner peripheral surface of the moving body 25 and the inner surface of the fixed pipe 23. The ventilation part 10 through which the air supplied from the second region S2 passes is formed by the gap 10a with the peripheral surface.

  In addition, the expansion-contraction rotation means provided in the rod-shaped body 9 is not limited to this embodiment, and can be appropriately changed in design, for example, a type that operates by air or hydraulic pressure.

  In the present embodiment, the box-shaped main body 4 is used via the lifting device 13.

  As shown in FIG. 1, the elevating device 13 has a configuration in which a telescopic body 29 having a grounding portion 29a provided in the lower portion is provided in an upright state, and an operation portion 30 provided in the lower portion is operated on the grounding surface. Thus, the operation unit 30 is configured to be able to operate the intake means 7 and the dust separation means 6 described above.

  The box-shaped main body 4 may be provided with a CCD camera or the like, and the operation unit 30 may be provided with a monitor so that the operation can be performed while viewing the monitor.

  The dust D removing operation using the dust removing device according to the present embodiment having the above-described configuration will be described. In addition, although the present Example demonstrated by the operation | work which removes the dust D adhering to the grill body 3 arrange | positioned at the vent part 2 as an inlet, it arrange | positions at the vent part 2 as a blower outlet. Of course, it can be used in the operation | work which removes the dust D adhering to the grill body 3 to be performed.

  First, the elevating device 13 is operated to raise the box-shaped main body 4 to a position where the grill body 3 is disposed, and the opening 5 of the box-shaped main body 4 is adsorbed to the frame body 3a of the grill body 3 in an airtight state. Make contact. At this time, the internal pressure of the duct 1 and the internal pressure of the internal space S of the box-shaped main body 2 are in substantially the same pressure state.

  In this state, when the air suction means 7 is operated to suck the air in the inner space S of the box-shaped main body 4 and the dust separation means 6 is operated, the rod-shaped body 9 becomes the fin material 3b of the grill body 3 and the shutter member 3c. When the abutting body 8 provided at the tip of the rod-shaped body 9 that has been rotated and rotated is brought into contact with the fin member 3b of the grill body 3 and the shutter member 3c. The extension of the rod-shaped body 9 stops and only rotates, and the dust D adhering to the fin material 3b and the shutter member 3c of the grill body 3 is swept away by the rotating contact body 8 and separated. The dust D is sucked by the intake means 7 and stored in the first region S1 as a dust storage space (FIG. 11).

  At this time, air that has passed through the ventilation portion 10 of the rotating rod-like body 9 is jetted from the jet nozzle portion 12, and a swirling airflow is generated toward the proximal end side of the rod-like body 9. The dust D separated from the air is sent in the direction of the intake means 7 (direction toward the inner space S of the box-shaped main body 4) also by the swirling airflow (see FIG. 12).

  When the rod-shaped body 9 is rotated in the opposite direction after a predetermined time has elapsed, the rod-shaped body 9 contracts and returns to its original position, stops the operation of the air intake means 7 and the dust separating means 6, and the lifting device The box-shaped main body 4 is lowered by operating 13 and the apparatus is removed from the construction site to complete the work.

  Therefore, according to the present embodiment, since the grill body 3 is covered with the box-shaped main body 4, the dust D separated from the grill body 3 is reliably prevented from being scattered around. Therefore, it is possible to remove the dust D.

  In addition, the present embodiment can be used even when the air conditioning equipment is operated, for example, and can be cleaned while maintaining the hygienic condition of the clean room, and is particularly arranged in the vent portion 2 as a suction port. It is effective in removing the dust D adhering to the grill body 3 provided, and a large amount of dust D is sucked at a time as in the conventional method described above, which adversely affects the air conditioning equipment (air purifier). Can be prevented reliably.

  Further, in this embodiment, the ventilation opening 2 is closed by the box-shaped main body 4 so that the internal pressure of the duct 1 and the internal pressure of the internal space S of the box-shaped main body 4 are substantially equal to each other. Since the structure is provided with the intake means 7 for sucking in the air, it does not require strong power and is excellent in cost.

  That is, if power stronger than the suction force of the duct 1 is used, the dust D is sucked into the duct 1 without making the internal pressure of the duct 1 and the internal pressure of the inner space S of the box-shaped body 4 substantially equal. Although it is considered that the intake means 7 can inhale the air without making it, the manufacturing cost increases and the running cost increases accordingly. In this respect, the present embodiment reliably obtains a good suction force without using such a powerful power (compressor) from the above-described structure, and therefore, in terms of cost (manufacturing cost and running cost). ).

  Further, in this embodiment, the box-shaped main body 4 is configured to be movable up and down via an elevating device 13, and an operating portion 14 that can operate the elevating device 13 is provided at a lower portion of the elevating device 13. Since the part 14 is configured to be able to operate the dust separating means 6 and the air intake means 7, when the grill body 3 is disposed at a high place, a scaffold is assembled in the conventional method. The work efficiency is poor and the cost is high, such as the need to carry in and out the materials accompanying it, and the work is not performed well if there is no wide space to build a scaffold, Various problems such as a risk of personal injury caused by work at high places are always occurring. However, in the present embodiment, these problems can be surely solved by providing the functions described above.

  Note that the present invention is not limited to this embodiment, and the specific configuration of each component can be designed as appropriate.

It is use condition explanatory drawing of a present Example. It is use condition explanation sectional drawing of a present Example. It is explanatory drawing of the principal part which concerns on a present Example. It is explanatory drawing of the principal part which concerns on a present Example. It is operation | movement explanatory drawing of the principal part which concerns on a present Example. It is operation | movement explanatory drawing of the principal part which concerns on a present Example. It is operation | movement explanatory drawing of the principal part which concerns on a present Example. It is explanatory sectional drawing of the principal part which concerns on a present Example. It is operation | movement explanatory drawing of the principal part which concerns on a present Example. It is explanatory sectional drawing of the principal part which concerns on a present Example. It is schematic operation explanatory drawing of a present Example. It is a schematic operation | movement explanatory drawing of the principal part which concerns on a present Example. It is explanatory drawing of the conventional method.

Explanation of symbols

D Dust S Internal space 1 Duct 2 Ventilation port 3 Grill body 4 Box-shaped body 5 Abutting portion 6 Dust separating means 7 Intake means 8 Abutting body 9 Rod-shaped body
10 Vent
11 Pneumatic feed section
12 Injection nozzle
13 Lifting device
14 Operation unit

Claims (6)

  A dust removing device for removing dust adhering to a grill body disposed in a vent part such as an air outlet or a suction port provided in a duct of an air conditioner or the like, the grill body or the vent opening or A box-shaped main body having an inner space that closes the ventilation opening by abutting in an airtight state is provided at the periphery thereof, and when the ventilation opening is closed by the box-shaped main body, the internal pressure of the duct and the box-shaped main body The internal pressure of the internal space is configured to be almost the same pressure, and the internal space of the box-shaped main body is provided with dust separation means for separating dust attached to the grill body from the surface of the grill body. And a dust removing device provided with suction means for sucking air in the inner space.   2. The dust removing device according to claim 1, wherein a member having moderate flexibility is disposed in the abutting portion of the box-shaped main body that abuts on the grill body or the vent opening or its peripheral portion.   The dust separating means comprises a rod-like body having an abutting body that abuts against the grill body at the front end portion, and is rotatably provided in the inner space of the box-shaped main body, and the rod-like body is rotated. 4. The structure according to claim 1, wherein the dust attached to the grill body can be separated from the surface of the grill body by the contact body provided on the rod-shaped body. The dust removal apparatus as described in.   4. The dust removing device according to claim 3, wherein the rod-shaped body is configured to extend until the contact body contacts the grill body.   A ventilation portion is provided in the longitudinal direction inside the rod-like body, and air is sent to the ventilation portion from an air feeding portion connected to the proximal end portion of the rod-like body. A nozzle is provided at the tip of the rod-like body for injecting the air that has been fed to the tip of the rod-like body and the jet direction of the nozzle is jetted toward the base end of the rod-like body The dust removing device according to any one of 3 and 4, wherein the dust removing device is set in a direction in which the dust is removed. The box-shaped main body is configured to be movable up and down via an elevating device, and an operation unit capable of operating the elevating device is provided at a lower portion of the elevating device, and the operation unit includes the dust separating unit and the intake unit. It is comprised so that it can operate, The dust removal apparatus of any one of Claims 1-5 characterized by the above-mentioned.

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