FI106103B - Arrangement for cleaning ventilation ducts - Google Patents

Description

1 106103

APPARATUS FOR CLEANING AIR CONDITIONING Ducts

The present invention relates to a device for cleaning air ducts according to the preamble of claim 1.

Nowadays, e.g. in Finnish Announcement no. 94221 discloses a method and apparatus for cleaning air ducts. In this known solution, a flexible drive arm is coupled to the rear end of the pneumatic motor via a flexible cross member having a torque transferring cross member and a spring for elasticity and recovery. Compressed air pipes are also connected to this end of the pneumatic motor. They, like the operating arm, are protected inside a plastic protective tube.

The disadvantage of this known solution is that the pneumatic tubes are out of the spring, allowing them to make a large knee when bending and therefore easily bending near the rear of the pneumatic motor, thereby completely or at least restricting the flow of compressed air. After folding the pneumatic pipes, the pneumatic pipes, the operating arm and the protective pipe must be shortened and re-connected before continuing the work, this operation takes a lot of time and at the same time the aforementioned parts are shortened, thus shortening the working time of the device. It is stated in the application that the protective tube passes over the compressed air motor, but in practice this is not ψ, but ends about 10-20 cm before the rear end of the compressed air motor. The protective tube is so small in diameter that it cannot accommodate the spring contained in the aforementioned cross-member, and the protective tube is made of flexible but rigid plastic, so that it has a large bending radius of 2 106103. Em. consequently, the compressed air motor has a more flexible portion at the rear which bends more easily, thereby not exerting too much force on the engine and the brushes at its end to the outside of the ventilation duct. As can be seen from the foregoing, the pneumatic tubes behind the pneumatic motor without proper control and therefore easily fold, in addition, the pneumatic tubes twist and move within the shield, causing additional wear.

The above drawbacks can be overcome by an apparatus for cleaning air-conditioning ducts according to the invention, which is characterized in what is defined in the characterizing parts of the claims.

One of the main advantages of the invention is that the pneumatic tubes do not bend, and do not wrap around the operating arm, so that they are slightly worn. Thanks to the invented elastic part, the compressed air pipes maintain a larger turning radius, which prevents the pipes from bending, resulting in a constant flow of air. By changing the material of the elastic member, the desired stiffness can be selected. Further, the stiffness of the elastic member can be easily adjusted by moving the drive motor in or out of the elastic member. Adjusting the stiffness is very important because users want to choose the stiffness according to their usage habits depending on the ventilation duct and the cleaning brush used. Fastening of the drive motor is easy and fast, eg using hexagon socket screws. The invented elastic member is very inexpensive to manufacture. The fasteners that come with the elastic member are preferably aluminum, which makes them extremely lightweight. According to the invention, the pneumatic tubes and the like attached to the operating arm cannot wrap around it 3 106103, which makes them extremely long-lasting. When operating the device according to the invention, all the power of a compressed air compressor can be used without damaging the piping, thus saving working time. The elastic member of the invention collects the oil from the pneumatic motor so that it cannot enter the protective tube. The engine return air enters the elastic member, where the air flow slows down, whereby the oil gets stuck to the elastic member walls and filter, which prevents the oil from getting trapped in the ventilation duct during cleaning. It is clear from the foregoing that the use of the invention provides significant cost savings.

The invention will now be described in detail with reference to the accompanying drawings.

Fig. 1 shows a device according to the invention for cleaning air ducts, partly in section and perpendicular to the side.

Fig. 2 shows the motor mount of the device of Fig. 1, partly in section and perpendicular to the side.

Figure 3 is a front view of the motor mount of Figure 2.

Figure 4 is a sectional view of the device of Figure 1, partly in section and perpendicular to the side.

ψ

Figure S is a front view of the bracket of Figure 4.

Fig. 6 is a partial sectional view of the device of Fig. 1, viewed perpendicular to 4,610,103.

Fig. 7 shows the elastic portion of the device of Fig. 1, partially in section and perpendicular to the side.

The device shown in the figures has the following parts, a drive motor 1, having a front end 1a, a rear end 1b and a cover 1c, a resilient part 2 having a front end 2a and a rear end 2b, a motor mounting 3, a locking member 3a, a bracket 4, a connecting member 4a and an opening 4b. , pneumatic tube 5, operating arm 6, protective tube 7, attachment point 8, suction means 9, shrinking socket 10, disinfecting tube 11, shield 12, connecting piece 13 and filter 13.

In the device according to the invention, the drive arm 6 is attached to the bracket 4 by means of, for example, a thread and a locking nut. The fastener 4 is attached to the elastic member 2 by adhesive and / or pipe fasteners such as, for example, a lanyard. The elastic member 2 is a substantially non-twisted, non-stretchable flexible tube. Essentially non-twist memory and unstretched means that the twist and stretch of the tube is so small that it is undetectable when used, however, the tube is flexible laterally, e.g. with metal reinforcement or the like inside. The front end 2a is attached to the motor mounting bracket 3 where the drive motor 1 is attached, or the front end 2a is directly connected to the drive motor 1.

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The elastic member 2 is a reinforced rubber hose, such as a hydraulic hose, most preferably a hydraulic oil return hose.

At the rear end 2b of the elastic member 2, there is in part a bracket 4 which is attached to the upper part of the elastic member 2 by a hose clamp and / or adhesive such as, for example, a pigtail. The bracket 4 has s 106103 connecting member 4a e.g. a thread for securing the operating arm 6 and an opening (s) 4b for pneumatic and other pipes.

The inner diameter of the elastic member 2 is larger than the outer diameter of the drive motor 1, whereby it can be secured by a hose clamp over the elastic member 2.

The motor mount 3 is attached at least in part to the elastic member 2 by an adhesive such as, for example, pigflex or the like. The inner diameter of the motor bracket 3 is larger than the outer diameter of the drive motor 1. The drive motor is secured by one or more locking means, such as, for example, an Allen screw, for adjusting the travel length of the drive motor 1.

The inside of the elastic part 2 of the motor mount 3 has an external thread for securing gluing.

The pneumatic tubes 5 are pivotally connected to the drive arm 6 and to the brush end of the protective tube 7.

The attachment point 8 has one or more locking means 9 fixedly fixed to the drive arm 6, such as e.g. a clip or the like which is a fastener for compressed air pipes 5.

The attachment point 8 in Figs. 1 and 6 has one or more shrink stockings 10 around and, respectively, the compressed air pipes 5 and the locking member (s) 9 fixedly connected to said end of the protective tube 7 by one or more shrink stockings 10. The shrinking sock 10 is known in advance, for example, for the connection of electrical wire connections.

6 106103

The motor mount 3 has holes and ducts, as well as a connection portion for disinfecting the conduit 11 for disinfecting the ventilation duct, whereby duct disinfection can be performed with the same device and even at the same time as cleaning or when the device enters the duct

Advantageously, the invented device can be made by known methods from previously known raw materials. Figure 1 shows a prior art connection piece 13 which facilitates assembly of the device. In addition, the figure shows a previously known shield 12, as well as a newly invented filter 14 disposed within the elastic member 2. The filter 14 removes the compressed air oil needed to lubricate the engine 1. The filter 14 may be made of known materials such as wire mesh or wool. The filter 14 can be replaced or washed when its oil removal ability is impaired.

The device operates in such a way that the elastic part 2 prevents the formation of steep bends of the compressed air pipes 5 and the disinfection pipe 11 and hence the bending of the pipes. The function of the attachment point 8 is to immobilize the operating arm 6 with the pneumatic tubes 5, the protective tube 7 and the disinfection tube 11. The attachment point 8 r improves the durability of the pneumatic tubes 5 and the disinfection tube 11.

It will be apparent to one skilled in the art that the invention is not limited to the embodiments, but that many modifications are possible within the scope of the inventive concept as defined in the appended claims 106103 7. As a variant of the modification, it may be mentioned that the elastic part can be made, in addition to the rubber tube, for example from a metal spring, a metal woven flexible tube used in connection with the exhaust pipes or the like.

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Claims (10)

Apparatus for cleaning air ducts, comprising a drive motor (1) using one or more cleaning brushes and movable by a flexible drive arm (6) in the air duct, characterized in that the drive arm (6) is attached to the bracket (4) and in a portion (2) which is substantially a non-rotatable, non-stretchable flexible tube and that its front end (2a) is secured to the motor mount (3) where the drive motor (1) is attached, or the front end (2a) is directly connected to the drive engine (1) ). Device for cleaning air-conditioning ducts according to claim 1, characterized in that the elastic member (2) is a reinforced rubber hose, such as a hydraulic hose, most preferably a hydraulic oil return hose. Device for cleaning ventilation ducts according to claim 1, characterized in that at the rear end (2b) of the elastic member (2) there is a bracket (4) which is attached to the elastic member (2) by a hose clamp and / or glue, such as with a pigflex, and that the bracket (4) has a connection oil (4a), for example, a thread for attaching the operating arm (6) and an opening (s) (4b) for compressed air (5) and other pipes. Device for cleaning air-conditioning ducts according to claim 1, characterized in that the inside diameter of the elastic member (2) is larger than the outer diameter of the drive motor (1), whereby it can be secured by a hose clamp over the elastic member (2). 9 106103 Device for cleaning air-conditioning ducts according to claim 1, characterized in that the motor mount (3) is at least partially inside the elastic member (2) by means of an adhesive such as a pigflex or the like and that the inner diameter of the motor mount (3) larger than the outer diameter, and that the drive motor is secured by one or more locking means, such as hexagon screws, to adjust the inlet length of the drive motor (1). Device for cleaning ventilation ducts according to claim 1, characterized in that the insertion part of the motor mount (3) has an external thread for securing the gluing. Device for cleaning air-conditioning ducts, characterized in that the compressed air pipes (5) are pivotally connected to the drive arm (6) and to the brush-side end of the protective pipe (7). Device for cleaning air-conditioning ducts according to claim 7, characterized in that the attachment point (8) has one or more locking means (9) fixedly attached to the drive arm (6), such as e.g. a pet or the like which is a fastener for compressed air pipes (5). 8 106103 Device for cleaning ventilation ducts according to claim 7, characterized in that one or more shrink stockings (10) and the locking member (s) (9) are fixedly connected around the compressed air pipes (5), respectively, and the locking member (s). secured to said end of the protective tube (7) by one or more shrink stockings (10) applied thereto. Device for cleaning air ducts, characterized in that the motor mount (3) has holes and a duct system, and a connection part for a disinfection pipe (11) for disinfecting the air duct. : · * W w 106103