Vacuum cleaning device with a tank-type vacuum cleaner

Abstract

The invention relates to a vacuum cleaning device with a tank-type vacuum cleaner, a suction hose which is connected to the housing of the tank-type vacuum cleaner, and a filter bag. The tank-type vacuum cleaner has a motor fan unit which is designed such that the average electric input power of the fan unit ranges from 1000 W to 200 W and results in a vacuum of more than 12.5 kPa in the measuring chamber when using aperture 6 and a vacuum of more than 4.0 kPa in the measuring chamber when using aperture 8 in the event of an average electric power input ranging from 1000 W to 800 W; a vacuum of more than 10.0 kPa in the measuring chamber when using aperture 6 and a vacuum of more than 3.4 kPa in the measuring chamber when using aperture 8 in the event of an average electric power input ranging from 799 W to 600 W; a vacuum of more than 7.0 kPa in the measuring chamber when using aperture 6 and a vacuum of more than 2.5 kPa in the measuring chamber when using aperture 8 in the event of an average electric power input ranging from 599 W to 400 W; and a vacuum of more than 4.0 kPa in the measuring chamber when using aperture 6 and a vacuum of more than 1.4 kPa in the measuring chamber when using aperture 8 in the event of an average electric power input ranging from 399 W to 200 W. The suction hose has an average cross-sectional area of at least 9 cm.sup.2, in particular at least 11 cm.sup.2 or 13 cm.sup.2, and the filter bag has a bag surface area between 2500 cm.sup.2 and 5000 cm.sup.2 and is a disposable filter bag made of a nonwoven fabric.

Claims

1. A vacuum cleaning device comprising: a tank-type vacuum cleaner having a suction hose connected to a housing of the tank-type vacuum cleaner, and comprising: a disposable filter bag, wherein the tank-type vacuum cleaner comprises a motor/fan unit, which is configured to operate at an average electrical input power between 1000 W and 200 W measured in accordance with Standard DIN EN 60312-1, section 5.8; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 1000 W and 800 W with aperture 6 (23 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 12.5 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 1000 W and 800 W with aperture 8 (40 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 4.0 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 799 W and 600 W with aperture 6 (23 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 10.0 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 799 W and 600 W with aperture 8 (40 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 3.4 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 599 W and 400 W with aperture 6 (23 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 7.0 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 599 W and 400 W with aperture 8 (40 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 2.5 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 399 W and 200 W with aperture 6 (23 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 4.0 kPa; wherein when the vacuum cleaning device is tested in accordance with Standard DIN EN 60312-1, section 5.8, operating at the average electrical input power between 399 W and 200 W with aperture 8 (40 mm) the vacuum cleaning device generates a negative pressure in the measurement chamber greater than 1.4 kPa; wherein the suction hose has an average cross-sectional area of at least 9.5 cm.sup.2, and wherein the filter bag has a bag surface of between 2500 cm.sup.2 and 5000 cm.sup.2 and is made of nonwoven material.

2. The device according to claim 1, wherein the tank-type vacuum cleaner comprises a filter bag receptacle with a volume of 7 l to 15 l.

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

4. The device 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 the maximum cross-sectional area.

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

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

7. The device according to claim 1, wherein when the vacuum cleaning device with aperture 7 (30 mm) is tested in accordance with DIN EN 60312-1 section 5.8.4, the vacuum cleaning device has a degree of efficiency of at least 35%.

8. The device according to claim 1 wherein the filter bag comprises a flat bag.

9. The device according to claim 1, wherein the filter bag has surface folds.

10. The device according to claim 1, wherein the filter bag is equipped with at least one deflector device.

11. The device according to claim 1, wherein the tank-type vacuum cleaner comprises a bag cage, which is configured in order to accommodate the filter bag and to at least partially space the filter bag from an internal housing wall of the tank-type vacuum cleaner.

12. The device according to claim 11, wherein the bag cage is configured to accommodate the filter bag with surface folds.

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

14. The device 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.

15. The device according to claim 6, wherein the diameter of the suction pipe is more than 33 mm.

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

17. The device according to claim 1, wherein when the vacuum cleaning device with aperture 7 (30 mm) is tested in accordance with DIN EN 60312-1 section 5.8.4, the vacuum cleaning device has a degree of efficiency at least 38%.

18. The device according to claim 1, wherein when the vacuum cleaning device with aperture 7 (30 mm) is tested in accordance with DIN EN 60312-1 section 5.8.4, the vacuum cleaning device has a degree of efficiency more than 40%.

Description

BRIEF DESCRIPTION OF THE FIGURES

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

(2) FIGS. 2a and 2b show air data for a motor/fan unit, which is implemented in vacuum cleaning devices according to the prior art;

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

(4) FIGS. 4a and 4b: shows the dependency of the achieved air flow on the filling of the filter bag for different embodiments of a device according to the invention;

(5) FIG. 5 shows a bag cage, which is particularly suitable to be implemented in the present invention; and

(6) FIG. 6 shows a schematic view of a tank-type vacuum cleaner.

EMBODIMENTS OF THE INVENTION

(7) In the vacuum cleaning device 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, to 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).

(8) 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).

(9) 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 W), 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.

(10) 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. 503 W and in FIG. 2b of app. 1968 W are shown.

(11) 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 similar 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 an average electrical input power of approximately 480 W regarding the exemplary embodiment is approximately three times higher than for the prior art.

(12) 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.

(13) In FIGS. 4a and 4b, for vacuum cleaning devices 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 devices of the prior art, as shown in FIGS. 1a and 1b.

(14) FIG. 4 shows results for an average input power of app. 460 W and/or app. 1020 W by using a flat bag and of a conical hose with a minimum diameter of 47 mm by using or not using a bag cage. 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. 3080 cm.sup.2. The used material was Material SMS92, which is to be obtained from Eurofilters N.V., Lieven Gevaertlaan 21, 3900 Overpelt, Belgium. 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. 460 W with an empty filter bag, a volume flow of nearly 38 l/s is achieved; for a filling with 400 g DMT type 8 and by using a bag cage, still nearly 32 l/s volume flow is achieved, and even after charging 800 g DMT 8, still a volume flow results of nearly 24 l/s. With an average input power of only app. 1020 W, even without using a bag cage with empty filter bag, nearly 50 l/s is achieved and with a high filling of 800 g DMT type 8 still around 32 l/s volume flow is achieved.

(15) Thus, the achievable volume flows are considerably higher than in the prior art, according to which with an average input power of app. 465 W, only a volume flow of 21 l/s with an empty filter bag and with app. 1026 W, a volume flow with an empty filter bag of just under 30 l/s can be achieved.

(16) In the following table, the air data for the tank-type vacuum cleaner Numatic HVR200A (HI and LO) according to the prior art as well as according to the above described embodiment of the tank-type vacuum cleaner according to the invention are summarized:

(17) TABLE-US-00001 Average Degree of Degree of electrical Air flow Air flow Air capacity at Air capacity at efficiency efficiency Voltage power input aperture 7 aperture 8 aperture 7 aperture 8 aperture 7 aperture 8 [V] [W] [l/s] [l/s] [W] [W] [%] [%] Numatic 230 968 43.2 49.0 280.6 127.2 22.1 10.1 HVR200A Power level Hi Domel 220 976 52.0 66.3 496.3 319.0 41.5 26.3 467.3.601-7 Numatic 230 503 33.0 36.7 122.7 53.1 19.9 8.7 HVR200A Power level Lo Domel 130 480 40.6 51.8 232.0 150.2 40.9 26.3 467.3.601-7