EP2926705A1 - Device for vacuum cleaning with a tank-type vacuum cleaner - Google Patents

Abstract

The invention relates to a device for vacuuming with a Kesselstaubsauger, connected to the housing of the boiler vacuum cleaner suction hose and a filter bag, the boiler vacuum cleaner having a motor-blower unit, which is designed such that the average electrical power consumption is between 1000 W and 200 W, and at a mean electrical input power between 1000 W and 800 W, a negative pressure in the measuring chamber at orifice 6 of greater than 12.5 kPa and a negative pressure in the measuring chamber at orifice 8 of greater than 4.0 kPa results, 799 W and 600 W. a negative pressure in the measuring chamber at orifice 6 of greater than 10.0 kPa and a negative pressure in the measuring chamber at orifice 8 greater than 3.4 kPa results, 599 W and 400 W, a negative pressure in the measuring chamber at orifice 6 of greater than 7 , 0 kPa and a negative pressure in the measuring chamber at aperture 8 greater than 2.5 kPa results, 399 W and 200 W, a negative pressure in the measuring chamber at Blen de greater than 4.0 kPa and a negative pressure in the measuring chamber at orifice 8 of greater than 1.4 kPa results, and wherein the suction hose has a mean cross-sectional area of at least 9 cm 2, in particular at least 11 cm 2 or 13 cm 2, and the filter bag has a bag area between 2500 cm 2 and 5000 cm 2 and is a nonwoven disposable filter bag.

Description

FIELD OF THE INVENTION

The invention relates to a device for vacuuming comprising a boiler vacuum cleaner with a connected to the housing of the boiler vacuum cleaner suction hose, and comprising a filter bag made of nonwoven fabric.

DEFINITIONS

• VO 666/2013: VERORDNUNG (EU) Nr. 666/2013 DER KOMMISSION vom 8. Juli 2013 zur Durchführung der Richtlinie 2009/125/EG des Europäischen Parlaments und des Rates im Hinblick auf die Festlegung von Anforderungen an die umweltgerechte Gestaltung von Staubsaugern.
• VO 665/2013: DELEGIERTE VERORDNUNG (EU) Nr. 665/2013 DER KOMMISSION vom 3. Mai 2013 zur Ergänzung der Richtlinie 2010/30/EU des Europäischen Parlaments und des Rates im Hinblick auf die Energieverbrauchskennzeichnung von Staubsaugern.

The following standards, definitions and measuring methods are used to describe the state of the art and the invention:

• Regulation 666/2013: Commission Regulation (EU) No 666/2013 of 8 July 2013 implementing Directive 2009/125 / EC of the European Parliament and of the Council with regard to ecodesign requirements for vacuum cleaners.
• Regulation 665/2013: Commission Delegated Regulation (EU) No 665/2013 of 3 May 2013 supplementing Directive 2010/30 / EU of the European Parliament and of the Council with regard to energy labeling of vacuum cleaners.

Nominal power consumption: The rated power consumption in W denotes the electrical input power specified by the manufacturer, with devices having other functions in addition to the vacuum cleaner function, only the electrical power consumption when used as a vacuum cleaner is relevant (VO 666/2013, Annex II, para. 2, letter k).

EN 60312: EN 60312 designates - unless otherwise stated - the standard DIN EN 60312-1 (VDE 0705-312-1) in the January 2014 edition: Domestic vacuum cleaners - Part 1: Dry vacuum cleaners - Test method for determining the performance characteristics (IEC 60312-1: 2010, modified + A1: 2011, modified); German version EN 60312-1: 2013.

Determination of the air data: The air data of a vacuum cleaner are determined in accordance with EN 60312 section 5.8. The measuring device B is used in accordance with section 7.3.7.3. If motor-blower units are measured solo, ie without a vacuum cleaner housing, the measuring device B is also used. For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply.

Power consumption of a vacuum cleaner: The power consumption P _{1 of} a vacuum cleaner at a given orifice is determined in accordance with EN 60312 section 5.8. The measuring device B is used in accordance with section 7.3.7.3. For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply.

Power consumption of a motor-blower unit: The power consumption P _{1 of} a motor-blower unit at a given orifice is also determined in accordance with EN 60312 section 5.8. The measuring device B is used in accordance with section 7.3.7.3. For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply.

• P_f = Leistungsaufnahme in Watt nach 3 Minuten Betrieb auf der Messkammer bei Blende 9 (Nenndurchmesser d₀ = 50 mm)
• P_i = Leistungsaufnahme in Watt nach weiteren 20s Betrieb auf der Messkammer bei Blende 0 (Nenndurchmesser d₀= 0 mm).

Average electrical power consumption of a vacuum cleaner: The average power consumption of a vacuum cleaner is determined using the experimental setup for determining the air data in accordance with EN 60312, Chapter 5.8. The measuring chamber version B is used. For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply. The average recording power is defined as $$\mathrm{P}=\mathrm{0}.\mathrm{5}\left({\mathrm{P}}_{\mathrm{f}}+{\mathrm{P}}_{\mathrm{i}}\right)$$

• P _f = power consumption in watts after 3 minutes of operation on the measuring chamber at aperture 9 (nominal diameter d ₀ = 50 mm)
• P _i = power consumption in watts after another 20s operation on the measuring chamber at aperture 0 (nominal diameter d ₀ = 0 mm).

• P_f = Leistungsaufnahme in Watt nach 3 Minuten Betrieb auf der Messkammer bei Blende 9 (Nenndurchmesser d₀ = 50 mm)
• P_i = Leistungsaufnahme in Watt nach weiteren 20 s Betrieb auf der Messkammer bei Blende 0 (Nenndurchmesser d₀ = 0 mm).

Average electrical power consumption of the motor-blower unit: The average electrical power consumption of a motor-blower unit is carried out with the test set-up for determining the air data in accordance with EN 60312 chapter 5.8. For this, the motor-blower unit is connected directly to the measuring chamber (version B). For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply. The average recording power is defined as $${\mathrm{P}}_{\mathrm{m}}=\mathrm{0}.\mathrm{5}\left({\mathrm{P}}_{\mathrm{f}}+{\mathrm{P}}_{\mathrm{i}}\right)$$

• P _f = power consumption in watts after 3 minutes of operation on the measuring chamber at aperture 9 (nominal diameter d ₀ = 50 mm)
• P _i = power consumption in watts after another 20 s operation on the measuring chamber at aperture 0 (nominal diameter d ₀ = 0 mm).

Average power consumption when determining the performance characteristics of a filled dust container: The average power consumption for determining the performance characteristics of a filled dust container is determined on the basis of EN 60312 (see in particular chapter 5.9). Deviating from this standard, the measurement is carried out with the measuring chamber B at aperture 8. The average power consumption in the determination of the functional properties with a filled filter bag is defined as the mean value of the power consumption when the filter bag is empty and the power consumption when the filter bag is filled. For the suction of the test dust and the maximum amount to be absorbed (filled filter bag), the conditions of chapter 5.9.2., Especially the conditions of 5.9.2.3 apply.

Air flow: The air flow is determined according to EN 60312 with the measuring chamber according to version B. The air flow can be determined at different apertures. In accordance with EN 60312, measurements are made with a 30 mm diameter orifice. If this is measured differently for another aperture, this is stated. In the prior art, this air flow is often referred to as volume flow or suction air flow.

Airflow drop : The airflow drop is determined according to EN 60312 chapter 5.9 with the measuring chamber according to design B.

Notwithstanding this standard, the measuring chamber is equipped with a 40 mm perforated plate (according to standard 30 mm). The vacuum values h _f in the measuring chamber are converted into an air flow according to chapter 7.3.7. The difference between the airflow when the filter bag is empty and the airflow when the filter bag is loaded is called airflow waste.

Disposable filter bag : A disposable filter bag or disposable bag in the sense of the present invention is understood to mean a disposable filter bag.

Flat bags: A flat bag is understood to mean filter bags whose filter bag wall is formed from two individual layers of filter material with the same area such that the two individual layers are connected to one another only at their peripheral edges (the term "same area" does not of course exclude the two individual layers from one another distinguish that one of the layers has an entrance opening).

The connection of the individual layers can be realized by one or more (for example four) welding or adhesive seams along the entire circumference of the two individual layers.

Alternatively, the filter bag can be formed by a single layer of filter material such that the single layer is folded around one of its symmetry axes and the remaining open peripheral edges of the resulting two partial layers are welded or glued (so-called tubular bag). In such a production therefore one circumferential or more (for example three) welding or gluing seams are necessary. Two of these seams then form the filter bag edge, the third seam can also form a filter bag edge or lie on the filter bag surface.

Each of the aforementioned single layers of filter material may comprise multiple layers of nonwoven fabric, as is common for nonwoven filter bags today.

The welded or adhesive seams can also be designed as a spiral fold.

Flat bags may also have so-called gussets. These gussets can be completely unfoldable. A flat bag with such gussets is for example in the DE 20 2005 000 917 U1 shown (see there FIG. 1 with folded gussets and FIG. 3 with unfolded gussets). Alternatively, the gussets may be welded to portions of the peripheral edge. Such a flat bag is in the DE 10 2008 006 769 A1 shown (see there in particular FIG. 1 ).

Filter bag with surface folds: EP 2 366 320 A1 and EP 2 366 321 A1 disclose filter bag with surface wrinkles in the context of the present application.

Suction power: Suction power is the product of negative pressure [kPa] and air flow [l / s] and is designated P ₂ according to EN 60312.

Efficiency: The efficiency of the motor-blower unit or a vacuum cleaner is calculated from the suction power P ₂ and the power consumption P ₁ according to EN 60312 chapter 5.8 (see in particular chapter 5.8.4., Paragraph 4). For this purpose, the motor-blower unit or the vacuum cleaner is connected to the measuring chamber (version B). For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply. The nominal diameters d _{0 of} the diaphragms used can be found in the table in Section 7.3.7.3. The efficiency for a given aperture is calculated according to $$\mathrm{\eta }\left[\%\right]=\left({\mathrm{P}}_{\mathrm{2}}/{\mathrm{<figure-callout\; id="1"\; label="P"\; filenames="imgf0004.png"\; state="\{\{state\}\}">P</figure-callout>}}_{\mathrm{1}}\right)*\mathrm{100}$$

Here, P _{1 is} the power consumption of the vacuum cleaner (for a given aperture) and P _{2 is} the air power (for a given aperture), ie the product of airflow (see above) and negative pressure (see below).

Vessel vacuum cleaner : Construction of a vacuum cleaner in which a removable cover with the motor-blower unit is arranged on a mostly cylindrical dust collecting chamber. Boiler vacuum cleaners have filter bag holding spaces from 6 l to 25 l. Such a boiler vacuum cleaner is in FIG. 6 shown.

Negative pressure in the measuring chamber at a given orifice: The negative pressure in the measuring chamber at a given orifice is in accordance with EN 60312, Chapter 5.8. For this, the motor-blower unit is connected directly to the measuring chamber (version B). For any necessary intermediate pieces for connection to the measuring chamber, the explanations in chapter 7.3.7.1 apply. The nominal diameters d _{0 of} the diaphragms used are given in section 7.3.7.3.

Average cross-sectional area of a suction hose: To determine the average cross-sectional area of a suction hose, the cross-section of the suction hose is measured at 10 points uniformly distributed over the entire length of the suction hose and the mean value of these measurements is determined. The first measurement is performed at one end of the tube and the tenth measurement at the other end of the tube. The measurement of the cross-section is determined by internal gauge gauges corresponding to the shape of the cross-sectional area to be measured. For hoses that change their cross-sectional area, the limit gauge is inserted into the suction hose in the direction of the increasing cross-sectional area. Apart from irregular Cross-sectional areas can thus also determine the cross-sectional areas of spiral-wound or helically wound or otherwise structured suction hoses. This method can be used in particular in conical suction hoses.

Pouch area of a filter bag: The bag area of a bag designates the area that lies between the marginal welds that define the outer shape of the filter bag. Gussets and surface wrinkles must be taken into account for the calculation. The surface of the filling opening including a weld surrounding this opening is subtracted from the surface. It only means the theoretically usable area. Differences in the flow through the bag or due to incomplete unfolding of the filter bag are not taken into account. For filter bags that are not flat bags, of course, all additional surfaces (eg block bottom bag with side surfaces and end face) are used to determine the bag area.

Volume Filter bag holding space : The volume can be determined from the 3D drawing data of the vacuum cleaner or determined by pouring water or granules.

Deflection device: deflection devices for deflecting air in the sense of the application are, for example, in WO 2007 059936 A1 . WO 2007 059937 A1 . WO 2007 059938 A1 and WO 2007 059939 A1 disclosed.

Bag cage: Bag cage means a device which ensures that there is a gap between the filter bag and the wall of the filter bag space. It is important to ensure that the contact area between the filter bag and the bag basket is as small as possible. The bag basket can be made of any materials and be removable or permanently installed. An example of a bag basket is in FIG. 5 shown. A 3D record of in FIG. 5 described bag basket can be obtained from Eurofilters NV, Lieven Gevaertlaan 21, 3900 Overpelt, Belgium. If filter bags with surface folds are used, then a bag basket can be used which is specially adapted to these surface folds. How such a bag cage is designed, the WO 2012 126612 (especially Figures 3 and 4 ).

Efficient vacuum cleaner: An efficient vacuum cleaner has an energy efficiency rating of B or better (according to VO 665/2013, ANNEX I) and at the same time a cleaning class of C or better (according to VO 665/2013, APPENDIX I).

STATE OF THE ART

The demands placed on devices for vacuuming have undergone a significant change in recent years.

The VO 666/2013 requires the nominal power consumption of vacuum cleaners from 2017 to be limited to below 900 W. The VO 665/2013 means that in the longer term the annual energy consumption of a vacuum cleaner should be less than 10 kWh. This results in a rated power consumption of a vacuum cleaner of less than 300 W. The users of devices for vacuuming, however, expect that the cleaning performance compared to devices for vacuuming, as they are realized today with much higher recording power, not deteriorate. This is also taken into account by Regulation 665/2013, for example by Sets the requirement for an A rating (carpet cleaning class) for the dust absorption of carpet to ≥ 91%.

Of particular importance are the specifications of the European Commission also for boiler vacuum cleaners, which is defined by (see above) that its filter bag receiving space has a volume of 6 to 25 l. This vacuum cleaner type is used as a vacuum cleaner for commercial use and as a household vacuum cleaner (for definitions see VO 665/2013, Article 2, Item 10). Despite the relatively large filter bag receiving spaces of tank vacuum cleaners and correspondingly large filter bags, the efficiency of conventional tank vacuum cleaners is not satisfactory.

Thus, for example, a Numatic Henry HVR200A used in the household and in the commercial sector achieves the air data according to EN 60312 chapter 5.8.4) at aperture 8 (40 mm) and a power consumption P ₁ of 1054 W (suction power setting at the vacuum cleaner stage : Hi, in the following short HI) only a resulting suction air flow of 29.3 l / s. Already with this suction air flow a very good dust absorption of carpets (cleaning class C or better) is hardly possible. The resulting air flow at a power consumption P ₁ of 472 W (suction power setting on the device level: Lo, hereinafter referred to as LO) is insufficient for satisfactory dust absorption. Thus, with a power consumption of 472 W (at aperture 8) only an air flow of 21.3 l / s is achieved.

The situation with respect to the air flow still deteriorates during the filling of the filter bag during use of the vacuum cleaner. FIG. 1a respectively. FIG. 1b shows by way of example the air flow (volume flow in l / s) achieved by a Numatic Henry HVR200A at an average power consumption when determining the performance characteristics with a filled dust container of 465 W (LO) or 1026 W (HI) depending on the filling up to a maximum of 800 g DMT type 8 according to EN 60312.

To ensure efficient suction, air flows of at least 33 l / s are desirable.

In the Numatic Henry HVR200A a motor-blower unit is used whose characteristics, ie their air data in FIG. 2a (LO) and FIG. 2b (HI) are shown.

The mean electrical input power of the vacuum cleaner must be clearly differentiated from the mean electrical input power of the motor-blower unit, since the total mean electrical input power of the motor-blower unit is substantially converted into the air flow to be achieved, whereas the average electrical input power of the vacuum cleaner for compensation the flow losses that result from the flow paths in the vacuum cleaner (from the floor nozzle to the air outlet from the device - without motor-blower unit) is spent.

The average electrical input power of the Numatic Henry HVR200A Motor Blower Unit is 968 W (HI) or 503 W (LO). With this average recording power, at aperture 8 (this aperture corresponds approximately to the conditions that are present on hard floor suction), an air flow of about 49.0 l / s (HI) and about 36.7 l / s (LO) can be achieved. Finally, when using this motor blower unit in the Numatic Henry HVR200A, the airflows (which are actually available for vacuuming) are 29.3 l / s (HI) and 21.3 l / s (LO) leads.

The suction hose of the Numatic Henry HVR200A has an average cross-sectional area of 7.9 cm ² .

DESCRIPTION OF THE INVENTION

In view of the aforementioned disadvantages of the prior art, the object of the invention is to provide a device for vacuuming with a tank vacuum cleaner and filter bags, in which the efficiency is improved over the devices according to the prior art and in the determination of the air data according to EN 60312 (Section 5.8.4) at aperture 8 (40 mm) a suction air flow of more than 33 l / s is achieved, so that a cleaning class of C according to VO 665/2013 or better achievable, and the average electrical power of the vacuum cleaner as possible is low, so that an energy efficiency class of B according to VO 665/2013 or better is achieved, so an efficient vacuum cleaner in the sense of the present invention is realized.

This object is achieved by a device for vacuuming according to claim 1. This comprises a boiler vacuum cleaner with a connected to the housing of the boiler vacuum cleaner suction hose and a filter bag, in particular a disposable filter bag, made of nonwoven fabric with a bag area of between 2500 cm ² and 5000 cm ² , the boiler vacuum cleaner a motor-blower unit with a mean electrical input power between 1000 W and 200W. Here, the motor-blower unit is designed such that at a mean electrical power input between 1000 W and 800 W, a negative pressure in the measuring chamber at aperture 6 (23 mm) of greater than 12.5 kPa and a negative pressure in the measuring chamber at aperture. 8 (40 mm) of greater than 4.0 kPa sets; between 799 W and 600 W a negative pressure in the measuring chamber at orifice 6 of greater than 10.0 kPa and a negative pressure in the measuring chamber at orifice 8 of greater than 3.4 kPa sets; between 599 W and 400 W a negative pressure in the measuring chamber at orifice 6 of greater than 7.0 kPa and a negative pressure in the measuring chamber at orifice 8 of greater than 2.5 kPa sets; and between 399 W and 200 W, a negative pressure in the measuring chamber at orifice 6 of greater than 4.0 kPa and a negative pressure in the measuring chamber at orifice 8 of greater than 1.4 kPa sets.

This particular characteristic of the motor-blower unit differs from the characteristic usually in devices for vacuuming inserted motor-blower units.

The differences in the air data between the present invention and the prior art are disclosed in Figure 2a and 2b that show the state of the art, as well as in Figure 3a and 3b , which show an embodiment of the invention, illustrates. With the same recording power, the motor-blower unit with the characteristic according to the invention provides a significantly higher airflow at the diaphragms (D6 and D8) which are essential for the cleaning effect. D6 roughly corresponds to the situation when vacuuming carpets, D8 corresponds approximately to the situation when sucking on hard floor.

Surprisingly, it has been found that a motor-blower unit as specified above in combination with a suction hose with a middle Cross-sectional area of at least 9 cm ² particularly efficiency-enhancing for boiler vacuum cleaner can be used and are comparable with the disposable filter bags made of nonwoven fabric in their cleaning effect with devices for vacuuming, as they are available today only with much higher recording power.

Accordingly, the suction hose must have an average cross-sectional area of at least 9 cm ² , in particular at least 11 cm ² or 13 cm ² .

Experiments have shown that the combination of said motor-blower unit and said suction hose with an average power consumption in the determination of the performance characteristics with a filled dust container of about 1020 W for generating an air flow of more than 48 l / s (with empty filter bag) and thus sufficient to achieve a more than satisfactory suction result. In addition, it has been shown that even a power consumption of approximately 460 W, which also fully meets the future energy policy requirements, is sufficient to generate an air flow of more than 36 l / s (with empty filter bag) and thus to achieve a satisfactory suction result ,

Here, the boiler vacuum cleaner may in particular have a filter bag receiving space with a volume of 7 l to 15 l. The volume can be determined by pouring water or granules according to EN 60312.

The suction hose may be at least partially tapered and have a larger cross-sectional area at an end proximate to the motor / blower unit than at an end remote from the motor / blower unit. In this case, the suction hose may have a minimum and a maximum cross-sectional area and the minimum diameter of the suction hose may be reduced by at least 5%, in particular at least by 20%, from the maximum diameter. For example, the smallest diameter of the conical suction hose may be 35 mm at the near end and 47 mm at the far end. Alternatively, the suction hose may have a cylindrical shape throughout. In addition to good handling, a conical shape of the suction hose can also increase the efficiency of the boiler vacuum cleaner.

Incidentally, other cross-sectional shapes of the suction hose (conically tapered or with a constant cross-section) are possible as long as the claimed cross-sectional areas are maintained.

The suction hose can have a length of 1 m to 3 m.

A suction pipe connected to the suction hose may have a diameter of more than 30 mm, preferably more than 33 mm and particularly preferably more than 36 mm.

The motor-blower unit may have an efficiency according to EN 60312 of at least 35%, preferably of at least 38% and particularly preferably of at least 40%, at aperture 7 (30 mm). This development of the invention leads to particularly efficient devices for vacuuming.

According to a development of the invention described above, including the cited developments of the invention, the boiler vacuum cleaner on a bag basket, which is designed to receive a filter bag and at least partially spaced it from an inner housing wall of the boiler vacuum cleaner. Thereby, a reduction of the filter performance can be avoided by abutment of the filter surface on an inner wall of the filter bag receiving space. An exemplary embodiment of a bag cage for the Numatic Henry HVR200A is shown in FIG FIG. 5 shown. In particular, the bag basket for receiving a filter bag, for example, a filter bag with surface wrinkles, be formed.

In all the embodiments described above, the filter bag can be provided in the form of a flat bag. The flat bag form is the most common form for nonwoven bags since bags of this shape are very easy to manufacture. In contrast to the paper filter material used in filter bags made of paper, nonwoven filter material is very difficult to permanently fold due to the high resilience, so that the production of more complex bag shapes, such as block bottom bags or other bottom bag shapes, although possible, but very expensive and expensive.

The filter bag may in particular have surface folds.

In addition, the filter bag may be provided with at least one deflection device. Accordingly, the above-mentioned bag basket can then be designed to receive filter bags with surface folds.

The various developments can be used individually as claimed or combined with each other.

BRIEF DESCRIPTION OF THE FIGURES

Figuren 1a und 1b

die Abhängigkeit des erreichten Luftstroms von der Befüllung des Filterbeutels gemäß dem Stand der Technik;

Figuren 2a und 2b

Luftdaten für eine Motor-Gebläseeinheit, die gemäß dem Stand der Technik in Vorrichtungen zum Staubsaugen eingesetzt wird;

Figuren 3a und 3b

Luftdaten für eine Motor-Gebläseeinheit, die sich besonders zur Implementierung der vorliegenden Erfindung eignet;

Figur 4a und 4b:

die Abhängigkeit des erreichten Luftstroms von der Befüllung des Filterbeutels für verschiedene Ausführungsformen einer erfindungsgemäßen Vorrichtung;

Figur 5

einen Beutelkorb, der sich besonders zur Implementierung der vorliegenden Erfindung eignet; und

Figur 6

eine schematische Ansicht eines Kesselstaubsaugers.

Show it:

FIGS. 1a and 1b

the dependence of the achieved air flow from the filling of the filter bag according to the prior art;

FIGS. 2a and 2b

Air data for a motor-blower unit, which is used in accordance with the prior art in devices for vacuuming;

FIGS. 3a and 3b

Air data for an engine blower unit particularly suitable for implementing the present invention;

FIGS. 4a and 4b:

the dependence of the achieved air flow from the filling of the filter bag for various embodiments of a device according to the invention;

FIG. 5

a bag basket particularly suitable for implementing the present invention; and

FIG. 6

a schematic view of a boiler vacuum cleaner.

EMBODIMENTS OF THE INVENTION

In the vacuuming apparatus of the present invention, an engine-blower unit having a specific characteristic is used in combination with a relatively large-diameter suction hose. Surprisingly, this combination leads to efficient vacuum cleaners in the sense of the invention, ie to a vacuum cleaner which has an energy efficiency class of B or better (according to VO 665/2013, ANNEX I) and at the same time a cleaning class of C or better (according to VO 665 / 2013, ANNEX I).

The motor-blower unit is characterized by a high volume flow, a high air flow and a high efficiency at aperture 7 (30 mm) and 8 (40 mm).

In the FIGS. 3a and 3b Air data for an exemplary embodiment of the motor-blower unit, as used in the invention, shown here, an engine-blower unit the company Domel with the type designation 467.3.601-7. The abscissa shows the suction air flow in units of dm ³ / s or l / s. The ordinate shows values of the negative pressure (in kPa), the efficiency (in%), the power (in W) and the air power (in W). In FIG. 3a results for a mean electrical input of about 480 W, in FIG. 3b shown by about 976 W.

As already mentioned, the show FIGS. 2a and 2b for comparison, the air data for a motor-blower unit of the prior art. In FIG. 2a The air data for a mean electrical input of about 503 W and in FIG. 2b shown by about 968 W.

Table 1 compares the relevant measurements for an exemplary embodiment of the engine blower unit of the present invention and a prior art motor blower unit. At similar mean electrical input power both the air flow at aperture 7 and aperture 8 and the air flow at aperture 7 and aperture 8 and the efficiency at aperture 7 and aperture 8 for the exemplary embodiment are much higher than for the prior art. For example, the airflow at orifice 8 and a mean electrical input power of about 480 W for the exemplary embodiment is about three times as high as in the prior art.

With comparable power consumption, the efficiency and air flow of the present embodiment are superior to the prior art motor-blower unit. In particular, with a relatively low mean electrical input power at the relevant panels, which correspond to the real situation on hard and carpeted floors, a very good air flow can be achieved with which a good cleaning efficiency class can be realized.

In Figure 4a and Figure 4b is shown for inventive devices for vacuuming the dependence of the achieved air flow of the filling amount of the filter bag. The results shown are similar to those of the prior art vacuuming apparatuses as shown in Figs FIGS. 1a and 1b shown is to compare.

FIGS. 4a and 4b show results for a mean power of about 460 W or about 1020 W using a flat bag and a conical tube with a minimum diameter of 42 mm and a maximum diameter of 47 mm with and without the use of a bag basket. For the average cross-sectional area of the embodiment according to the invention thus results in a value of 15.6 cm ² . The filter bag used has an area of 3080 cm ² . The filter material was that of Eurofilters NV, Lieven Gevaertlaan 21, 3900 Overpelt, Belgium used material related to SMS92. Incidentally, the embodiment of the invention corresponds to the prior art, as described above. Even with a mean intake capacity of only approx. 460 W, a volume flow of almost 38 l / s is achieved when the filter bag is empty; for a filling with 400 g DMT Type 8 and using a bag basket, the volume flow is almost 32 l / s, and even after loading with 800 g of DMT 8, a volume flow of almost 24 l / s is still achieved. With an average intake capacity of only approx. 1020 W, almost 50 l / s are achieved even without using a bag basket with an empty filter bag, and with a high filling of 800 g DMT Type 8, a good 32 l / s volume flow is achieved.

Thus, the achievable volume flows are significantly higher than in the prior art, with which at an average power of about 465 W, only a flow rate of 21 l / s with empty filter bag and 1026 W, a volume flow with an empty filter bag of almost 30 l / s can be achieved.

The following table summarizes the air data for the Numatic HVR200A (HI and LO) boiler vacuum cleaner according to the prior art and for the above-described embodiment of the boiler vacuum cleaner according to the invention: Voltage [V] Average electrical power [W] Air flow aperture 7 [l / s] Air flow aperture 8 [l / s] Air output at aperture 7 [W] Air output at aperture 8 [W] Efficiency Aperture 7 [%] Efficiency aperture 8 [%] Numatic HVR200A power level Hi 230 968 43.2 49.0 280.6 127.2 22.1 10.1 Domel 467.3.601-7 220 976 52.0 66.3 496.3 319.0 41.5 26.3 Numatic HVR200A power level Lo 230 503 33.0 36.7 122.7 53.1 19.9 8.7 Domel 467.3.601-7 130 480 40.6 51.8 232.0 150.2 40.9 26.3

Claims (12)

Device for vacuuming comprising
a boiler vacuum cleaner with a suction hose connected to the housing of the boiler vacuum cleaner, and comprising
a filter bag, in particular a disposable filter bag,
wherein the boiler vacuum cleaner has a motor-blower unit, which is designed such that the average electrical power consumption is between 1000 W and 200 W, and at a mean electrical power between • 1000 W and 800 W
a negative pressure in the measuring chamber at aperture 6 of> 12.5 kPa and
sets a negative pressure in the measuring chamber at aperture 8 of> 4.0 kPa, • 799 W and 600 W
a negative pressure in the measuring chamber at aperture 6 of> 10.0 kPa and
sets a negative pressure in the measuring chamber at aperture 8 of> 3.4 kPa, • 599 W and 400 W
a negative pressure in the measuring chamber at aperture 6 of> 7.0 kPa and
sets a negative pressure in the measuring chamber at aperture 8 of> 2.5 kPa, • 399 W and 200 W
a negative pressure in the measuring chamber at aperture 6 of> 4.0 kPa and
sets a negative pressure in the measuring chamber at aperture 8 of> 1.4 kPa, wherein the suction hose has an average cross-sectional area of at least 9 cm ² , in particular at least 11 cm ² or 13 cm ² , and
wherein the filter bag has a bag area between 2500 cm ² and 5000 cm ² and is made of nonwoven fabric. Apparatus according to claim 1, wherein the boiler vacuum cleaner has a filter bag receiving space with a volume of 7 l to 15 l. The apparatus of claim 2, wherein the suction hose is at least partially tapered and has a larger cross-sectional area at an end proximate to the motor / blower unit than at an end remote from the motor / blower unit. Apparatus according to claim 3, wherein the suction hose has a minimum and a maximum cross-sectional area and the minimum diameter of the suction hose is reduced by at least 5%, in particular at least 20%, from the maximum cross-sectional area. Device according to one of the preceding claims, wherein the suction hose has a length of 1 m to 3 m. Device according to one of the preceding claims, wherein a suction tube connected to the suction hose has a diameter of more than 30 mm, preferably more than 33 mm and particularly preferably more than 36 mm. Device according to one of the preceding claims, in which the motor-blower unit at aperture 7 (30 mm) has an efficiency according to EN 60312 of at least 35%, preferably of at least 38% and particularly preferably of more than 40%. Device according to one of the preceding claims, in which the filter bag is designed as a flat bag. Device according to one of the preceding claims, in which the filter bag has surface folds. Device according to one of the preceding claims, in which the filter bag is provided with at least one deflecting device. Device according to one of the preceding claims, in which the boiler vacuum cleaner has a bag basket, which is designed to receive a filter bag and at least partial spacing thereof from an inner housing wall of the boiler vacuum cleaner. Apparatus according to claim 11, in which the bag basket is designed to receive a filter bag with surface folds.

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