FI109096B - Device in a suction unit intended to suck impurities - Google Patents

Description

109096

Arrangement in connection with a suction apparatus for suction of impurities

The invention relates to an arrangement in connection with a suction apparatus for sucking contaminants, comprising a suction device connected to an object to be cleaned by means of a suction port and a blowing unit arranged to lead blowing air to

10 Such arrangements are known in various fields of industry. For example, solutions adapted to various machine tools, such as milling machines, lathes and the like, in which the machining takes place in a confined space, from which shavings, particles and other impurities formed during machining are removed. Another example is the operations performed during the painting steps. After the suction step, the impurities are filtered from the suction air by suitable filter means, after which the suction air is blown out. In addition, additional filters, silencers, etc. are usually provided on the blowing side. Known solutions have also occasionally used an additional blower adapted to blow air into the machining space 20 and thus to purge impurities in the machining space towards or in the vicinity of suction fluid. context has been used.

* 'The disadvantages of such arrangements have been, for example, the high level of noise * ·:' · the large size of the equipment and also the appearance aspects. In addition, the known solutions have the disadvantage of having a large number of components, such as an auxiliary blower, etc., which in turn has increased the costs.

The object of the invention is to provide an arrangement by which the drawbacks of the prior art can be eliminated. This has been achieved by the invention. The arrangement according to the invention is characterized in that: ···, the blowing connection 30 is arranged to start from the blowing side of the suction device and to conduct part of the blowing air of the suction device as blowing air through the blowing nozzle to the object to be cleaned.

The advantage of the invention is above all that the noise level is substantially lower than the solutions previously known. As an example of a noise reduction of -35, the noise level of the prior art device is about 76 dBA and the noise level of the device according to the invention is about 69 dBA, which shows that the invention achieves quite substantial noise reduction compared to the prior art. A further advantage of the invention is that it is possible to fit the control filter on the blow side of the suction device in a very advantageous manner, thus increasing the filtration rate compared to the prior art. The invention still has the advantage of providing a more favorable appearance than previously known solutions and also of considerably smaller dimensions than earlier solutions.

The invention will now be elucidated by the following exemplary embodiments shown in the accompanying drawings, in which: Fig. 1 is a perspective perspective view of a prior art suction device; Fig. 4 is a schematic view of another embodiment of an embodiment of the invention and Fig. 5 is a sectional view showing a detail of a suction device for use in an embodiment of the invention.

Figure 1 shows a typical prior art suction. device. Reference numeral 1 designates the blower, reference numeral 2 the filter unit and reference numeral 3 the impurity collecting bin. Reference numeral 4 denotes a suction port in Fig. 1 and reference numeral 5 denotes a silencer on the exhaust side of the suction device ** and reference numeral 6 a control filter. Figure 1 also shows, in principle, a cleaning connection 7 which: T: can be fitted in connection with the suction connection if necessary.

: T: The operation of the device of Figure 1 is basically as follows.

Impurities are aspirated by blower 1 through suction port 4 to suction unit si, where air is led through filter unit 2 so that impurities · · · · · · · · · · · · become adhered to the filters of the filter unit or fall into collecting container 3. muffler 5 and control filter 6:. · 'Through the suction device.

:, .. The structure and function of the above suction device is one of ordinary skill in the art, ..!. no details are given, ···. 35 in this context.

3, 109096

Figures 2 to 5 illustrate an arrangement according to the invention. Figure 2 shows a suction device used in an arrangement according to the invention. In Figure 2 the same reference numerals as in Figure 1 are used in the corresponding paragraphs. Figures 3 and 4 show, in principle, two examples of an arrangement according to the invention. Figure 5, in turn, shows an essential structural detail of the suction device of Figure 2.

As can be seen from Figures 3 and 4, the suction device of Fig. 2 is arranged by the suction connection 4 and the suction duct 8 connected thereto in a space 9 surrounded by its surroundings, for example a machine tool or the like. The machining-10 machine is not shown in the figures. The machine tool may be, for example, a milling machine or other device, as stated above. The arrangement further comprises a blowing unit 10 which is adapted to direct blowing air into a confined space 9 for blowing impurities towards or in the vicinity of the suction line, depending on the type of suction arrangement used. The purpose of blowing is thus to enable the most efficient suction operation, whereby impurities resulting from machining can be effectively sucked out of the machining space.

In accordance with the essential idea of the invention, the blowing connection 10 is arranged to start from the blowing side of the suction device and direct a portion of the blowing air of the suction device 20 through the blowing connection 10 into a confined space 9. As an example, it may be mentioned that in the order of 1/3 of the blower air of the suction device is directed through the blower connection 10.

In accordance with the invention, the air to be blown into space 9 can be advantageously utilized by utilizing a housing part 11 fitted to the suction device. The housing part 11 is shown in sectional view in Figure 5. The blowing air of the suction device is guided by rotation. A gentle exhaust outlet tan, ···, 30 is disposed on the side of the housing member 11 with respect to the rotational movement of the blowing air. The outlet is arranged to act as a starting point for the blowing unit 10 and as a means for guiding a portion of

Fig. 5 shows the structure of the housing part 11. Figure 5 shows the motor shown by reference numeral 13, the impeller by reference numeral 14 and the control filter by reference numeral 15 by reference numeral 15. As can be seen in Figure 5,

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The use of the lo-part 11 allows for a relatively compact design compared to the prior art 4,109,696 min, which is illustrated, for example, in Figure 1. It should be noted that the housing part provides a fairly effective sound reduction. The damping can be enhanced by applying a suitable soundproofing material 18 to the inner surface of the housing part, as shown in Figure 5. Figure 5 is marked by the arrow 5 in principle, the passage of air. The part of the air flowing out of the device always passes through the control filter 15. A portion of the blowing air flowing through the exhaust conduit 12 to the pu conduit 10 does not flow through the control filter. the part is led back to the space 10, where it exits, it is cleaned again by first passing through the suction device filter unit 2 and the control-10 auxiliary filter 15, unless it is re-directed to the blower connection 10.

As can be seen in the figures, the housing part 11 can be advantageously mounted on the suction device, whereby the overall height of the suction device is considerably lower than the height of the previously known devices and the appearance of the device is also improved. The housing part 11 can be mounted on the suction device, for example, by means of suitable quick release locks 16.

Figure 3 illustrates an embodiment in which the blow connection 10 is arranged to open into the space 9 so that the opening of the blow connection is substantially opposite to the opening of the inlet connection. In this arrangement, the blowing air advantageously transfers impurities towards the suction unit, so that the suction function is efficient.

Figure 4 illustrates an embodiment substantially corresponding to Figure 3 | * application. The essential difference is the arrangement at the suction connection.

: '* · In the embodiment of FIG. brush box ':' ': 25 17, which is intended to prevent contaminants from flying farther. The brush box has wall sections made of flexible bristles that prevent: 'i': impurities from flying away. Brush boxes are techniques known to those skilled in the art. In the embodiment of Fig. 4, the blowing air is adapted to flow so as to contribute to the retention of impurities in the area defined by the walls of the crate.

The foregoing embodiments are not intended to limit the invention in any way, but the invention may be modified freely within the scope of the claims. Thus, it is clear that the invention or its details need not necessarily be exactly as shown in the figures, but other solutions are also possible. For example, the invention is by no means limited to the environment-restricted space, but the 5,109,996 invention can of course also be applied, for example, to a machine tool in a normal industrial hall and to any work stage, etc.

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Claims (5)

An arrangement in connection with a suction apparatus intended for suction of impurities, comprising a suction apparatus which is connected by means of a suction stud (4) to the object to be cleaned for suction of impurities from the object, and a blower channel (10), which is arranged to direct blowing air to the object to be cleaned for blowing the impurities against the suction nozzle or for retaining the impurities in the vicinity of the suction nozzle, characterized in that the blowing channel (10) is arranged to bend from the suction side of the suction apparatus. part of the suction device's blowing air as blowing air through the blowing duct (10) to the object 10 to be cleaned. 2. Arrangement according to claim 1, characterized in that in connection with the suction apparatus a cover part (11) is arranged, by means of which the blowing air of the suction apparatus is controlled in a rotating movement and that on the side of the cover part (11) is a substantially tangential movement of the blowing air Arranged at the outlet nozzle (12), which is arranged to act as the starting point of the blowing duct. Arrangement according to claim 2, characterized in that a control filter (15) is also arranged in the cover part (11), through which the part of the blowing air of the suction unit which flows out of the arrangement is arranged to flow. # · 4. Arrangement according to claim 2 or 3, characterized in that: the cover part (11) is arranged on top of the suction apparatus. Arrangement according to any of the preceding claims 1-4, characterized in that the object to be cleaned is arranged in a space (9) defined from the environment. * · · L I · I ·