Vacuuming Apparatus

Abstract

The invention relates to a vacuuming apparatus having a vacuum cleaner, a suction hose which is connected to the housing of the vacuum cleaner, and a filter bag, wherein the cylinder-type vacuum cleaner has a motor/fan unit which is designed in such a way that the average electrical input power of said motor/fan unit lies between 1000 W and 200 W and a negative pressure in the measurement chamber at aperture 6 of greater than 12.5 kPa, and a negative pressure in the measurement chamber at aperture 8 of greater than 4.0 kPa result at an average electrical input power of between 1000 W and 800 W, a negative pressure in the measurement chamber at aperture 6 of greater than 10.0 kPa, and a negative pressure in the measurement chamber at aperture 8 of greater than 3.4 kPa result at an average electrical input power of between 799 W and 600 W, a negative pressure in the measurement chamber at aperture 6 of greater than 7.0 kPa, and a negative pressure in the measurement chamber at aperture 8 of greater than 2.5 kPa result at an average electrical input power of between 599 W and 400 W, a negative pressure in the measurement chamber at aperture 6 of greater than 4.0 kPa, and a negative pressure in the measurement chamber at aperture 8 of greater than 1.4 kPa result at an average electrical input power of between 399 W and 200 W, and wherein the suction hose has an average cross-sectional area of at least 9.5 cm.sup.2, in particular at least 11 cm.sup.2 or 13 cm.sup.2, and the filter bag is composed of nonwoven material.

Claims

1. A vacuum cleaning apparatus comprising: a vacuum cleaner having a suction hose connected to a housing of the vacuum cleaner, and comprising: a filter bag, comprising a disposable filter bag made of nonwoven material, wherein the vacuum cleaner comprises a motor/fan unit, which is configured such that an average electrical input power of which is between 1000 W and 200 W, and with an average electrical input power of between 1000 W and 800 W a negative pressure in the a measurement chamber at aperture 6 of >12.5 kPa and a negative pressure in the measurement chamber at aperture 8 of >4.0 kPa result, 799 W and 600 W a negative pressure in the measurement chamber at aperture 6 of >10.0 kPa and a negative pressure in the measurement chamber at aperture 8 of >3.4 kPa result, 599 W and 400 W a negative pressure in the measurement chamber at aperture 6 of >7.0 kPa and a negative pressure in the measurement chamber at aperture 8 of >2.5 kPa result, 399 W and 200 W a negative pressure in the measurement chamber at aperture 6 of >4.0 kPa and a negative pressure in the measurement chamber at aperture 8 of >1.4 kPa result, wherein the suction hose has an average cross-sectional area of at least 9.5 cm.sup.2.

2. The apparatus according to claim 1, wherein the filter bag has a bag surface of between 1000 cm.sup.2 and 4000 cm.sup.2.

3. The apparatus according to claim 2, wherein the suction hose conically tapers at least partially and has at an end near to the motor/fan unit a greater cross-sectional area than at an end distant to the motor/fan unit.

4. The apparatus according to claim 3, wherein the suction hose has a minimum and a maximum cross-sectional surface and wherein a minimum diameter of the suction hose is reduced by at least 5% compared to a maximum cross-sectional area.

5. The apparatus according to claim 1, wherein the suction hose has a length of 1 m to 3 m.

6. The apparatus according to claim 1, wherein a suction pipe connected to the suction hose has a diameter of more than 30 mm.

7. The apparatus according to claim 1, in which the motor/fan unit at aperture 7 (30 mm) has a degree of efficiency of at least 35% according to EN 60312.

8. The apparatus according to claim 1, wherein the filter bag is configured as flat bag or comprises surface folds and/or is equipped with a deflection device.

9. The apparatus according to claim 1, wherein the vacuum cleaner has a spacing unit comprising a bottom and/or at least a side wall or a cover in order to at least partially space apart a filter bag from at least one interior housing wall of the vacuum cleaning apparatus.

10. The apparatus according to claim 9, wherein the spacing unit is configured such that between the bottom and/or the at least one side wall or the cover overflow paths are provided.

11. The apparatus according to claim 9, wherein the spacing unit for a filter bag is configured with surface folds.

12. The apparatus according claim 9, wherein in the apparatus, against the air flow direction there are arranged in the following order: an air suction opening inside the bottom or inside the at least one side wall or inside the cover, through which during operation of the vacuum cleaner air from a filter bag receptacle is sucked into the motor/fan unit, a motor protection filter support, and the spacing unit, wherein the spacing unit is arranged spaced apart from the motor protection filter support.

13. The apparatus according to claim 12, wherein the spacing unit comprises a perforated plate or a grid or bars, bar-shaped sections, brackets, bracket-shaped sections, ribs, rib-shaped sections or pins.

14. The apparatus according to claim 12, wherein the motor protection filter support is configured such that a motor protection filter is retractable into the motor protection filter support or is foldable.

15. The apparatus according to claim 1, comprising a filter bag retaining plate accommodation, which is in respect of the vacuum cleaning apparatus arranged foldable or may be completely removed from the vacuum cleaner.

16. The apparatus according to claim 1, wherein the average cross-sectional area of the suction hose is at least 11 cm.sup.2 or 13 cm.sup.2.

17. The apparatus according to claim 4, wherein the minimum diameter of the suction hose is reduced by at least 20% compared to the maximum cross-sectional area.

18. The apparatus according to claim 6, wherein the diameter of the suction pipe is more than 36 mm.

19. The apparatus according to claim 7, wherein the degree of efficiency is at least 38%.

20. The apparatus according to claim 7, wherein the degree of efficiency is more than 40%.

Description

BRIEF DESCRIPTION OF THE FIGURES

[0074] FIGS. 1a and 1b show the dependency of the achieved air flow on the filling of the filter bag according to the prior art;

[0075] FIGS. 2a and 2b show air data for a motor/fan unit, which is implemented in vacuum cleaning apparatuses according to the prior art;

[0076] FIGS. 3a and 3b show air data for a motor/fan unit, which is explicitly suitable for being implemented in the present invention;

[0077] FIG. 4 shows the dependency of the achieved air flow on the filling of the filter bag for an apparatus according to the invention;

[0078] FIGS. 5a to 5p show different views of a spacing unit of the vacuum cleaning apparatus according to the invention; and

[0079] FIG. 6 shows an illustration of a filter bag, which is explicitly suitable for the present invention.

EMBODIMENTS OF THE INVENTION

[0080] In the vacuum cleaning apparatus according to the invention, a motor/fan unit having a specific characteristic in combination with a suction hose with a relatively large diameter is applied. This combination surprisingly leads to an efficient vacuum cleaner in the meaning of the invention, thus, a vacuum cleaner falling into an energy efficiency class B or better (according to VO 665/2013, ANNEX I) and simultaneously, into a cleaning performance class C or better (according to VO 665/2013, ANNEX I).

[0081] The motor/fan unit is characterized by a high volume flow, a high air capacity (power) and a high efficiency degree at aperture 7 (30 mm) and 8 (40 mm). The respective values are listed in table 1.

[0082] In FIGS. 3a and 3b, air data are shown for an exemplary embodiment of the motor/fan unit as used according to the invention, here, a motor/fan unit of the company Domel with the type designation 467.3.601-7. On the x-axis, the suction air flow in units of dm.sup.3/s and/or l/s is respectively plotted. The y-axis respectively shows values of the negative pressure (in kPa), the degree of efficiency (in %), the input power (in V\/), and the air capacity (in W). In FIG. 3a, results for an average electrical input power of app. 480 W, in FIG. 3b of app. 976 W are shown.

[0083] As already mentioned earlier, for comparison, FIGS. 2a and 2b show air data for a motor/fan unit of the prior art. In FIG. 2a the air data for an average electrical input power of app. 622 W and in FIG. 2b of app. 1121 W are shown.

[0084] In table 1, the relevant measured values for an exemplary embodiment of the motor/fan unit according to the invention and a motor/fan unit according to the prior art are compared with one another. With a low average electrical input power, the air data at aperture 7 and aperture 8, as well as the air capacity at aperture 7 and aperture 8, and the degree of efficiency at aperture 7 and aperture 8 for the exemplary embodiment are significantly higher than for the prior art. For example, the air capacity at aperture 8 and with an average electrical input power of approximately 480 W regarding the exemplary embodiment is approximately 70% higher than regarding the prior art with an average electrical input power of 622 W.

[0085] With a comparable input power, the degree of efficiency and the air flow of the embodiment according to the invention are superior to the motor/fan unit of the prior art. Specifically, with a relatively low average electrical input power with the relevant apertures corresponding to the real situation on hard and carpeted floors, a very good air flow may be achieved, with which a good cleaning performance class may be realized.

[0086] In FIG. 4, for vacuum cleaning apparatuses according to the invention, the dependency of the achieved air flow on the filling quantity of the filter bag is shown. The results shown are to be compared with those for vacuum cleaning apparatuses of the prior art, as shown in FIGS. 1a and 1b.

[0087] FIG. 4 shows results for an average input power of app. 670 W by using a flat bag with side folds according to FIG. 6 and of a conical hose with a minimum diameter of 47 mm by using a spacing unit.

[0088] The used spacing unit is in detail shown in FIGS. 5a to 5o. In FIG. 5p, the spacing unit is illustrated together with the motor protection filter support. As derivable from this FIG. 5p, due to the arrangement shown, it is ensured that between motor protection filter and filter bag, there is always a distance and that the filter bag does not cover the motor protection filter support that leads to the fact that the air from the filter bag is only sucked from the area of the filter bag covering the motor protection filter. A 3D data set of the vacuum cleaning apparatus described in FIG. 5 may be obtained from Eurofilters N.V., Lieven Gevaertlaan 21, 3900 Overpelt, Belgium. Specifically, the spacing unit for accommodating a specific filter bag, for example a filter bag according to FIG. 6, may be formed.

[0089] For the average cross-sectional area of the embodiment according to the invention, thus, a value of 15.6 cm.sup.2 occurs. The used filter bag has a surface of app. 1800 cm.sup.2. The used material was Material MTTS9, which is to be obtained from Eurofilters N.V., Lieven Gevaertlaan 21, 3900 Overpelt, Belgium. This is a multi-layer filter material with a dust holding layer and a meltblown fine filter layer. The filter bag comprises a deflection device in the form of a slit nonwoven material made of Material LF75, which may be also obtained from Eurofilters N.V., Lieven Gevaertlaan 21, 3900 Overpelt, Belgium.

[0090] Moreover, the embodiment according to the invention corresponds to the prior art as already explained earlier. Even with an average input power of only app. 670 W with an empty filter bag, a volume flow of 41 1/s is achieved; after filling with 400 g DMT type 8 and by using a spacing unit, still a volume flow of nearly 37 l/s is achieved.

[0091] Thus, the achievable volume flows are considerably higher than in the prior art, according to which with an average input power of app. 698 W, only a volume flow of 30 l/s with an empty filter bag can be achieved. After filling with 400 g DMT 8 dust, the volume flow even declines below 27 l/s and, therefore, lies app. 10 l/s lower than the embodiment according to the invention.

[0092] In the following table, air data for Miele S 8340 (max and carpet) according to the prior art as well as according to the above described embodiment of the vacuum cleaner according to the invention are summarized:

TABLE-US-00001 Average electrical Air capacity Air capacity Degree of Degree of power Air flow Air flow at at efficiency efficiency Voltage input aperture 7 aperture 8 aperture 7 aperture 8 aperture 7 aperture 8 [V] [W] [l/s] [l/s] [W] [W] [%] [%] Motor-fan unit 233 1121 47.6 55.5 378.0 185.0 27.8 13.3 Miele S 8340 Power level max Domel 220 976 52.0 66.3 496.3 319.0 41.5 26.3 467.3.601-7 Motor-fan unit 233 622 37.8 43.7 186.0 89.6 25.2 11.9 Miele S 8340 Power level Carpet Domel 130 480 40.6 51.8 232.0 150.2 40.9 26.3 467.3.601-7