EP2644075A1 - Method for optimising a device for vacuum cleaning with hand-held, compact or upright vacuum cleaning device and filter bag - Google Patents

Abstract

The method involves adjusting motor-fan characteristics and size, form and material of a filter bag, size and form of a filter bag holding chamber, length and internal diameter of a pipe and length and internal diameter of a hose and internal diameter of a pipe joint and a base nozzle such that an efficiency of preferably highest 32% is adjusted with a dust suction system during standard suction on a Wilton type standard carpet with an empty filter bag. The suction is performed according to standard EN 60312. The carpet is provided according to standard EN 60312. An independent claim is also included for a dust suction system.

Description

The invention relates to a method for optimizing a vacuum cleaning system comprising a floor-vacuum cleaner and a filter bag, wherein the vacuum cleaner a motor-blower unit with a motor-blower characteristic, a filter bag receiving space, a connection piece for the filter bag, a hose, a pipe and a bottom nozzle, and wherein the filter bag comprises a filter material made of nonwoven fabric. Furthermore, the invention relates to a vacuum cleaning system in which the same was used for the development and / or production of such a method for optimization.

USED STANDARDS AND DEFINITIONS Standard EN 60312:

References in the following description and the claims to the standard EN 60312 refer exclusively to the version: DRAFT DIN EN 60312-1 " Domestic vacuum cleaners - Dry vacuum cleaners - Test method for the determination of performance characteristics "(IEC 59F / 188 / CDV: 2009), German version FprEN 60312-1: 2009 with the date of publication of 21 December 2009 ,

Floor vacuum cleaner (also called floor vacuum cleaner):

A floor vacuum cleaner has a housing which is movable on rollers and / or skids on the ground. In this housing are a motor-blower unit and the filter bag storage room with the filter bag. Characteristic of a floor vacuum cleaner is that the housing is connected via a hose and a pipe with the floor nozzle. The floor nozzle is changeable. The lengths of tubing and tubing in such floor vacuum cleaners are typically in the range of 1.4m to 1.9m for the tubing and 0.6m to 1.0m for the tubing. Between pipe and hose is a typically bent intermediate piece in the form of a handle. This intermediate piece has a typical length of 0.3 m to 0.4 m. The inner diameter of this intermediate piece corresponds to the inner diameters of tube and hose. In the floor vacuum cleaner device, the tube is also referred to as a suction tube and the hose as a suction hose.

The vacuum cleaner devices in the sense of the present invention also include the vacuum cleaner devices of a group of upright vacuum cleaner devices.

The upright vacuum cleaner is a combination of a bottom part with floor nozzle, which often has a motor-driven brush roller, and a top part, in which the dust collection container is provided. The floor nozzle is not interchangeable and connected via a hose and / or a pipe to the dust collector. This tube and hose are also called Upright vacuum cleaners as a connecting pipe and connecting hose. The motor-blower unit may be disposed in the bottom part or in the top part. The vacuum cleaners of the Upright vacuum cleaner group, which is encompassed by the present invention, have a total length of hose and / or pipe of at least 0.5 m.

On the other hand, vacuum cleaners of the group of upright vacuum cleaners in which the total length of hose and / or pipe is smaller than 0.5 m are not included in the invention. In particular, if the filter bag is provided on the head (ie with an opening facing downwards), then the connection of hose and / or pipe between floor nozzle and filter bag can be made very short (<0.3 m).

For the sake of completeness, two other Staubsaugsystemtypen, which are not the subject of the present invention, called. These are the hand vacuum cleaner (or hand vacuum cleaner) - it consists of a housing with motor-blower unit and dust collecting space, at one end of the housing is a handle, at the other end a floor nozzle is changeable via a very short pipe; when the floor is vacuumed, the housing and the floor nozzle are moved back and forth, only the base plate and the rollers of the floor nozzle touch the floor, such arrangement without hose and long pipe), and the compact vacuum cleaner (or compact vacuum cleaner) consists of a housing with motor-blower unit and dust collecting chamber, which are mounted directly on the floor nozzle, or in which a floor nozzle is integrated, this housing is connected to a handle with a handle, such an arrangement comes almost completely without tube and almost without tube).

Motor-fan unit:

Motor-blower unit is the combination of an electric motor with a single or multi-stage blower. Usually, the two components are mounted on a common axis and matched in terms of performance optimally matched.

Air flow, negative pressure, suction power, air flow curve (air data) for the floor vacuum cleaner:

To determine this so-called air data, the floor-vacuum cleaner with filter bag, hose and pipe according to EN 60312 (see especially EN 60312, Chapter 5.8 air data), but without floor nozzle, measured. For this purpose, a so-called measuring box, as described in EN 60312, chapter 7.2.7. is described. In connection with the present invention, only the measuring box version B (see Chapter 7.2.7.2, Figure 20c) was used. The air data are determined for different orifices (0 to 9), which differ in the internal diameter of their opening size (0 mm to 50 mm) (see the table in chapter 7.2.7.2). The different diaphragms simulate a different load, which is caused by the floor nozzle and the substrate to be sucked in daily use.

If the floor vacuum cleaner is an upright vacuum cleaner covered by the present invention, then the entire upright vacuum cleaner with filter bag, according to EN 60312 (see in particular EN 60312, chapter 5.8 Air data), is measured to determine this so-called air data. The measuring box according to version B (see chapter 7.2.7.2, figure 20c) is also used for this purpose. The Upright vacuum cleaner is connected to the measuring box like a brush vacuum cleaner (see chapter 5.8.1.). The air data are determined for different orifices (0 to 9), which differ in the internal diameter of their opening size (0 mm to 50 mm) (see the table in chapter 7.2.7.2). The different diaphragms simulate a different load, which is caused by the floor nozzle and the substrate to be sucked in daily use.

The negative pressure h and power consumption P ₁ , which are set at the different apertures 0 to 9, are measured.

As the electrical power consumption of the vacuum cleaner device in the context of the present invention, the power consumption at aperture 8 (40 mm) is defined. This results in the practice-relevant values, since it is usually worked on different floor coverings approximately in this throttle state.

The average recording power P _1m [W] defines the mean value of the recording power at aperture 0 (0 mm) and aperture 9 (50 mm).

The air flow q (also referred to in the prior art as suction air flow or volume flow) is determined for each diaphragm from the measurement for the negative pressure (see EN 60312, Chapter 7.2.7.). If necessary, the measured values must be corrected in accordance with EN 60312, in particular with regard to standard air density (see EN 60312, Chapter 7.2.7.4). The airflow curve h (q) describes the relationship between the negative pressure and the airflow of a vacuum cleaner. It is obtained by interpolation, as described in EN 60312 (see EN 60312, Chapter 7.2.7.5), between the pairs of values obtained for the different orifices from the measured negative pressure and the determined airflow. The intersection with the x-axis gives the maximum achievable with the device air flow q _max . The negative pressure here is 0, so the device runs unthrottled.

The intersection with the y-axis indicates the maximum achievable with the device vacuum h _max . The air flow is equal to 0, the device is throttled maximum. This value results at aperture 0.

The curve shape of the airflow curve is characteristic of the type of blower used. In the field of vacuum cleaners mostly radial-type motor-blower units are used. The air is sucked parallel to the drive axle in this type and deflected by the rotation of the radial fan by 90 ° and blown radially to the drive axle. Furthermore, it is also possible to use motor-blower units of the axial type, in which the intake and outflow take place parallel to the drive axle. It is also possible to use diagonal motor-blower units. These are also drawn parallel to the drive axle, but the outflow is diagonal to the drive axle.

The linear interpolation between the measuring points for determining the airflow curve prescribed in standard EN 60312 is a very good approximation in the case of radial blowers and is therefore always used in the present case when the motor-blower unit is of the radial type. For axial and diagonal blowers, by contrast, a quadratic interpolation is used analogously to the standard EN 60312.

The intersections of the airflow curve with the coordinate axes are (regardless of the type of interpolation selected) characteristic of the blower geometry, the power consumption and the flow resistance in the vacuum cleaner.

By multiplying air flow and negative pressure, the suction power characteristic P ₂ can be derived from the air flow curve (see EN 60312, chapter 5.8.3, in the prior art this suction power is also referred to as air flow). The maximum of this curve is referred to as the maximum suction power P _{2max of} the vacuum cleaner. The efficiency η is calculated as the ratio of the mating values (ie, values of the same air flow) for suction power P ₂ and P power consumption. ₁ The maximum of this curve corresponds to the maximum efficiency η _{max of} the vacuum cleaner. Efficiency η is given in [%] according to EN 60312.

Air flow, negative pressure, suction power, motor-fan characteristic (air data) for the motor-blower unit:

The motor-fan characteristic describes the relationship between air flow and negative pressure of not built into a vacuum cleaner unit motor-fan unit at different throttle states, which in turn are simulated by the different apertures. The determination of the motor-fan characteristic curve is analogous to the determination of the airflow curve according to EN 60312.

For this purpose, the motor-blower unit is placed directly and airtight on the measuring box and measured at different apertures 0 to 9 in accordance with EN 60312. Otherwise, the procedure is the same as for measuring the airflow curve. Fig. 1a to Fig. 1d are technical drawings of a concrete embodiment of the connection of the motor-blower unit, which is used in the present invention, to the measuring box. Here, the wall of the measuring box is in Fig. 1a marked with I. In addition to this embodiment, any other configurations are possible as long as the inner dimensions of the air ducts are not changed (the radius of 20 mm of the funnel of the air duct in Fig. 1b "detail 02" and the conical extension of the air duct from 35 mm to 40 mm in Fig. 1c "detail 10", as well as the diameter of the opening of 49.2 mm in Fig. 1d "detail 11"). The motor-blower units used according to the prior art are connected with corresponding connections to the measuring box.

In turn, negative pressure and power consumption are measured at the different apertures 0 to 9. These measured values are corrected if necessary (see above). The air flow is determined for the corresponding orifices from the measured vacuum values. The motor-fan characteristic h (q) describes the relationship between the negative pressure and the air flow of the measured engine-fan unit. It results in turn from a linear or quadratic interpolation (depending on the motor-blower unit used, see above) between the pairs of values obtained for the different diaphragms from the measured negative pressure and the determined air flow. The point of intersection of the motor-fan characteristic curve h (q) with the x-axis in this case again defines the maximum airflow q _max achievable by the motor / fan unit. The vacuum at this point is 0, the motor-blower unit is running unthrottled. The intersection with the y-axis again indicates the maximum negative pressure h _max . The air flow is equal to 0 in this point, the device is completely throttled (aperture 0).

By multiplying the air flow and negative pressure for each measuring point, the suction power characteristic P ₂ can be derived from the motor-fan characteristic curve. The maximum of this curve is referred to as the maximum suction power of the motor-blower unit P _2max . The efficiency η is calculated as the ratio of the related values (ie values of the same air flow) for the suction power P ₂ and the power consumption P ₁ . The maximum of this curve corresponds to the maximum efficiency η _{max of} the motor-blower unit. Efficiency η is given in [%] according to EN 60312.

Reduction in efficiency:

The efficiency reduction is defined in the case of the vacuum cleaner in the present case as the difference between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum cleaner with empty filter bag and hose and tube but without floor nozzle. It is a measure of the losses of the vacuum cleaner system. The efficiency reduction is given in [%]. If the floor vacuum cleaner is an upright vacuum cleaner, it is measured in accordance with EN 60312 with floor nozzle.

Standard suction:

Standard vacuuming on the Wilton standard carpet is carried out as described in EN 60312, Chapter 5.3. Information on the Wilton standard carpet can be found in EN 60312, Chapter 7.1.1.2.1; and Annex C.1 of EN 60312

Efficiency and suction performance when standard vacuuming on standard carpet Wilton:

• Es wird eine Messung in Anlehnung an die Staubaufnahmemessung nach EN 60312, Kapitel 5.3 auf dem Normteppich vom Typ Wilton mit der Bedienvorrichtung nach Kapitel 4.8 durchgeführt. Abweichend zu dieser Vorschrift wird auf das Aufbringen des Prüfstaubes verzichtet.
• Die Punkte 5.3.4 bis 5.3.7 der EN 60312 entfallen somit.

The efficiency of standard vacuuming on the Wilton standard carpet is determined as follows:

• A measurement based on the dust pick-up measurement according to EN 60312, chapter 5.3 on the Wilton standard carpet with the operating device according to chapter 4.8 is carried out. Notwithstanding this rule, the application of the test dust is dispensed with.
• Points 5.3.4 to 5.3.7 of EN 60312 are therefore eliminated.

During the measurement, the flow velocity in the exhaust air of the Kanomax Model 6813 vane anemometer with APT275 impeller probe of 70 mm diameter is measured (manufacturer of this anemometer is Kanomax, 219 US Hwy 206, PO Box 372 Andover, NJ 07821). www.kanomax-usa.com). For this purpose, the vane probe was fastened above the blow-out opening of the vacuum cleaner device at a position at which the above-mentioned anemometer indicates a flow velocity value which is approximately in the middle of the measuring range of the anemometer, ie approximately 20 m / s. This serves to ensure that the flow velocity of the exhaust air is within the measuring range of the anemometer. After attaching the anemometer, the value of the flow velocity is measured accurately. Then the floor vacuum cleaner without floor nozzle with standard pipe, handle and hose to the measuring box, version B, for measuring the air data according to EN 60312, chapter 5.8, connected with panel 8. If the floor vacuum cleaner is an upright vacuum cleaner, the measurement is also carried out in accordance with Chapter 5.8 of EN 60312, but with a floor nozzle. The same value of the flow rate in the exhaust air of the vacuum cleaner as measured during the dust collection measurement on the Wilton standard carpet is then set. This adjustment of the flow rate is carried out by appropriate adjustment of the operating voltage of the motor-blower unit. It is important that the position of the anemometer with respect to the exhaust opening compared to the dust collection measurement not changed. The actual position of the anemometer is not critical here.

With this setup the vacuum value according to EN 60312, chapter 5.8.3 is measured and the airflow according to EN 60312, chapter 7.2.7.2 is determined.

This value obtained for the air flow is transmitted in the determined air flow curve to read the corresponding negative pressure, to determine the suction power P ₂ from both values, and together with the power consumption P ₁ corresponding to the air flow, the efficiency of normal sucking on the standard carpet to determine the type of Wilton.

The negative pressure value can also be calculated, namely by calculating a regression line for the airflow curve and the airflow value directly into this regression equation (this regression equation is linear or quadratic, depending on the type of motor-blower unit, see above) to calculate the negative pressure (see also EN 60312, chapter 7.2.7.5).

Standard filling of the vacuum cleaning system with 400 g DMT8 standard dust:

The standard filling of the dust extraction system with 400 g DMT8 standard dust is carried out in accordance with Chapter 5.9 of EN 60312. The DMT8 standard dust must also be provided in accordance with EN 60312.

Dust removal:

The dust absorption of carpets is determined according to EN 60312, chapter 5.3. The pumping speed with a filled filter bag is determined according to chapter 5.9. Contrary to the demolition conditions in Chapter 5.9.1.3, 400 g of DMT8 dust are always sucked in.

Flat bag, filter bag wall, fold, length, height and width, and direction of a fold, surface fold, maximum height of surface fold:

The terms flat bag, filter bag wall, fold, length, height and width and direction of a fold, surface folding, maximum height of surface folding are in the present specification and the claims according to the EP 2 366 321 A1 used definitions.

Determining the area of the opening area of the corresponding rectangle:

The area of the rectangle corresponding to the opening area is determined in the context of the present invention by means of the so-called minimally circumscribing rectangle which is well known from image processing (see, for example, in US Pat Tamara Ostwald, "Object Identification Using Regions Descriptive Features in Hierarchically Partitioned Images", Aachener Schriften zur medizinische Informatik, Volume 04, 2005 .)

For determining the area of the rectangle, it is to be distinguished whether the opening area is in one plane (two-dimensional opening area with two-dimensional edge) or the opening area is extending beyond one plane (three-dimensional opening area with three-dimensional edge).

In the case of a two-dimensional opening area, the area of the rectangle corresponding to the opening area is determined directly by the area of the minimally circumscribing rectangle of the two-dimensional edge of the opening area.

For a three-dimensional surface, before the surface of the rectangle can be identified with a circumscribing rectangle, the three-dimensional edge must first be transformed into a two-dimensional edge. For this, the edge is divided into N equal parts. By this division, N points P _n (n = 1,..., N) are set on the three-dimensional edge. Then, the center of gravity SP of this three-dimensional boundary is determined, and the distance d _n of each of the N points P _n to the center of gravity SP is determined. This results in a set of points in polar coordinates K _n (d _n ; (360 × n / N) °). If one lets N be very large, then this point set becomes a two-dimensional edge corresponding to the three-dimensional edge, for which a circumscribing rectangle can be determined. For transformation according to the present invention, N = 360 is set.

The area of the rectangle corresponding to the opening area represents a good and unambiguous approximation of the opening area of the vacuum cleaner device, which can be easily determined even with complex opening areas and opening edges.

The surface of a filter bag in the sense of the present invention is determined on the filter bag when it lies flat in a completely unfolded form, ie in a 2-dimensional form. In a filter bag with non-welded gussets, the gussets are fully unfolded to determine the area. On the other hand, if the filter bag has welded gussets, these are not taken into account when determining the area. For example, the area of a filter bag having a rectangular shape results from taking the filter bag out of its packaging, fully unfolding it, measuring its length and width, and multiplying them by one another.

Welded and not welded gussets:

Flat bags in the sense of the present invention may also have so-called gussets. These side folds 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 ).

Absorption volume of the filter bag in the receiving space, maximum absorption volume:

The receiving volume of the filter bag in the filter bag receiving space is determined according to the present invention according to EN 60312, Chapter 5.7.

The maximum receiving volume of the filter bag is determined according to the present invention in analogy to EN 60312, Chapter 5.7. The only difference to EN 60312, Chapter 5.7, is that the filter bag is designed to be suspended in a chamber the volume of which is at least sufficient to prevent the filter bag from fully expanding to its maximum possible size when fully filled. For example, a cube-shaped chamber with an edge length equal to the root of the sum is sufficient the squares of maximum length and maximum width of the filter bag is this requirement.

Surface of the filter bag, surface of the filter bag receiving space:

The surface of the filter bag in the sense of the present invention is defined here as twice the area occupied by the filter bag when it lies flat in a completely unfolded form, ie in a 2-dimensional form. The area of the entrance opening and the area of the welds are not taken into account as they are comparatively small in relation to the actual filter area. Likewise, any foldings provided in the filter material itself (to increase the surface area of the filter material) are disregarded. The surface of a rectangular filter bag (as defined above) thus results simply from being taken out of its package, fully unfolded, measured its length and width, multiplied together and the result taken two times.

The surface of the filter bag accommodation space in the sense of the present invention is defined as the surface that the filter bag accommodation space would have (if any) all the facilities (ribs, rib sections, stirrups, etc.) provided in the filter bag accommodation space for the filter material of the filter bag Filter bag from the wall of the filter bag receiving space remains isolated (which is required for a smooth filter material to ensure that even air can flow through the filter bag) remain disregarded. The surface of a cuboid filter bag receiving space with ribs thus results as maximum length times maximum width times maximum height of the filter bag receiving space without taking into account the dimensions of the ribs.

Since the surface of the filter bag accommodating space enters the above relation only as a lower limit, in order to determine whether a particular vacuum cleaner in combination with the filter bag makes use of the previously discussed embodiment, especially if the filter bag containing space is of complicated geometrical shape, alternatively the surface of a parallelepiped Body can be determined, which completely encloses the filter bag receiving space; the surface of such a body is obtained, for example, when the surface of a cuboid with the edge lengths, that of the maximum extent of the actual filter bag receiving space in the length, width and height direction correspond, determined (length, width and height direction are hereby of course orthogonal to each other).

STATE OF THE ART

Due to the scarcity of resources, it is becoming increasingly important to save energy in the areas of daily life, for example in the field of household appliances, such as vacuum systems. It is desirable here that the function of such vacuum cleaning systems is not limited compared to the previously known.

Such energy saving presupposes that the vacuum cleaning systems are optimized with regard to their energy consumption, whereby the function of such optimized vacuum cleaning systems, ie in particular the dust absorption, should not be impaired.

According to the prior art, the components of a vacuum cleaner with a floor vacuum cleaner and a filter bag, the vacuum cleaner having a motor-blower unit with a motor-fan characteristic curve, a filter bag receiving space, a hose, a pipe and a floor nozzle, and wherein the filter bag comprises a filter material made of nonwoven fabric, optimized so that at a given electrical power consumption, also referred to as power consumption, a maximum suction power according to EN 60312 is achieved. With devices currently available on the market that are touted as ecological devices with reduced power consumption, the power consumption is in the range of about 800 W to about 1,300 W.

Such optimized vacuum cleaning systems, for example, the vacuum cleaner Miele S5 Ecoline. It can be achieved with an empty vacuum cleaner filter bag dust absorption according to EN 60312 in the standard carpet of the Wilton type with a pushing force of 44 N of about 82%. With a pushing force of 30 N, about 78% of dust is reached. A pushing force of 30 N is considered by the Stiftung Warentest (Stiftung Warentest, Lützowplatz 11-13, 10785 Berlin, Germany, PO Box 30 41 41, 10724 Berlin) as the consumer maximum reasonable pushing force. The Stiftung Warentest assumes that the consumption in case of even higher pushing forces reduces the suction power of a vacuum cleaner and therefore the dust absorption values at higher pushing forces are not relevant.

Another vacuum cleaning system is the vacuum cleaning system Siemens Z5.0 VSZ5GPX2. It can be achieved with an empty vacuum cleaner filter bag dust collection according to EN 60312 in the standard carpet of the Wilton type with a pushing force of 32 N of about 78%.

Fig. 2a and Fig. 2d show the air data of the motor-blower units used in the vacuum cleaning system Siemens Z5.0 VSZ5GPX2 and in the vacuum cleaning system Miele S5 Ecoline, Fig. 2b and Fig. 2e show the air data for the vacuum cleaning system Siemens Z5.0 VSZ5GPX2 and the vacuum cleaning system Miele S5 Ecoline with empty filter bag and Fig. 2c and Fig. 2f show the air data for the vacuum cleaning system Siemens Z5.0 VSZ5GPX2 and the vacuum cleaning system Miele S5 Ecoline with filter bag filled with 400 g DMT8 dust. These measurements were carried out with the original accessories and original filter bags supplied by Siemens and Miele respectively to these vacuum cleaners. The data obtained are discussed below in connection with the data for the floor vacuum cleaner systems according to the invention.

In view of this state of the art, the object of the invention is to optimize vacuum systems consisting of floor vacuum cleaners and filter bags in such a way that the electrical power consumption of the vacuum cleaner of the system can be considerably reduced without adversely affecting the dust absorption according to EN 60312 ,

BRIEF DESCRIPTION OF THE INVENTION

This object is achieved by the method according to claim 1.

• Aufeinanderabstimmen von Motor-Gebläse-Kennlinie und Größe, Form und Material des Filterbeutels und Größe und Form des Filterbeutelaufnahmeraums und Innendurchmesser des Anschlussstutzens für den Filterbeutel und Länge und Innendurchmesser des Rohrs und Länge und Innendurchmesser des Schlauches und Bodendüse, derart, dass sich bei dem Staubsaugsystem beim normgemäßen Saugen auf einem Normteppich vom Typ Wilton bei leerem Filterbeutel ein Wirkungsgrad von mindestens 24 %, vorzugsweise mindestens 28 %, höchst vorzugsweise mindestens 32 %, einstellt, wobei das normgemäße Saugen nach der Norm EN 60312 durchgeführt wird und der Normteppich vom Typ Wilton gemäß der Norm EN 60312 vorgesehen wird.

In particular, a method for optimizing a vacuum cleaner system with a floor vacuum cleaner and a filter bag, wherein the floor vacuum cleaner, a motor-blower unit with a motor-fan characteristic, a filter bag receiving space, a connection piece for the filter bag, a hose, a pipe and a floor nozzle, and the filter bag comprises a non-woven fabric filter material, comprising the following step:

• Matching motor-fan characteristic and size, shape and material of the filter bag and size and shape of the filter bag receiving space and inner diameter of the connecting piece for the filter bag and length and inner diameter of the tube and Length and inner diameter of the hose and floor nozzle, such that in the vacuum cleaning system in accordance with standards on a standard carpet Wilton type with empty filter bag, an efficiency of at least 24%, preferably at least 28%, most preferably at least 32%, sets the standard Suction is carried out in accordance with standard EN 60312 and the Wilton standard carpet is provided in accordance with standard EN 60312.

Surprisingly, it has been shown that in the optimization described above, the power consumption can be significantly reduced compared to previous vacuum systems.

Thus, for example, with a power input of about 500 watts, a dust absorption according to EN 60312 in the case of the Wilton standard carpet of 79% with a pushing force of 30 N can be realized. With only a significantly better dust absorption of 82% but significantly higher pushing force of 44 N, a Miele S5 Ecoline has an electrical power of 1346 W. The electrical power of the optimized with the inventive vacuum cleaning system over the vacuum cleaner Miele S5 Ecoline can be reduced by 63%. Compared to the Siemens Z5.0 VSZ5GPX2 vacuum cleaner, the 789 W electrical power consumption can be reduced by 37% with almost the same dust absorption of 78% and almost the same pushing force of 32 N.

The inventive method can be developed such that from motor-fan characteristic and size, shape and material of the filter bag and size and shape of the filter bag receiving space and length and inner diameter of the tube and length and inner diameter of the tube, first, an air flow curve is determined, which with the Floor nozzle is coordinated so that the highest possible efficiency is achieved when vacuuming on the standard carpet Wilton. This development represents a particularly efficient implementation of the method described above.

All of the methods described above can also be developed in such a way that the matching results furthermore that after standard filling of the vacuum system with 400 g DMT8 standard dust in accordance with standards sucking on the standard carpet Wilton, an efficiency of at least 15%, preferably at least 20%, most preferably at least 25%, with DMT8 standard dust being provided in accordance with standard EN60312.

According to this development, it is ensured that the vacuum cleaning system also has a long service life.

All of the methods described above can also be developed in such a way that the matching results in the efficiency reduction between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum system with the filter bag empty being less than 30%, preferably less than 20%. most preferably less than 15%. As a rule, it is measured without a floor nozzle; if the vacuum cleaner is an upright vacuum cleaner with a floor nozzle.

According to this development, the other components of the vacuum system are adapted particularly efficient to the motor-blower unit

In accordance with another development, in all of the above-described methods, co-tuning may also result in the efficiency reduction between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum system being less than 40%, preferably 400 pouches of DMT8 standard dust filled filter bag less than 30%, most preferably less than 25%. As a rule, it is measured without a floor nozzle; if the vacuum cleaner is an upright vacuum cleaner with a floor nozzle.

This development is characterized by a particularly efficient adaptation of the other components of the vacuum system to the motor-blower unit with a long service life.

In all of the methods described above, the co-tuning can be developed so that the suction power of the vacuum system in normal sucking on the standard carpet Wilton with empty filter bag at least 100 W, preferably at least 150 W, most preferably at least 200 W is and / or that the suction power of the vacuum system in accordance with standard suction on the standard carpet of the Wilton type with filled with 400 g of DMT8 standard dust filter bag at least 100 W, preferably at least 150 W, most preferably at least 200 W.

The values given here ensure that Wilton has both sufficient air flow and sufficient negative pressure to achieve good dust absorption.

In addition to or in addition to the alternatives described above, the system can be tuned such that the air flow at normal sucking on the standard carpet Wilton with empty filter bag at least 25 l / s, preferably at least 30 l / s, particularly preferred is at least 35 l / s and / or that the air flow at standard sucking on the Wilton standard carpet at 400 g DMT8 standard dust filled filter bag at least 25 l / s, preferably at least 30 l / s, more preferably at least 35 l / s is.

If the system is tuned in this way, then it is ensured that a minimally used electric power leads to a satisfactory suction performance with a long service life.

All the methods described above can be developed in such a way that a filter bag in the form of a flat bag with a first and a second filter bag wall is used, the first and / or the second filter bag wall having at least five folds, wherein the at least five folds form at least one surface fold, the maximum height before the first use of the filter bag in a floor vacuum cleaner device is smaller than the maximum height corresponding maximum width. Preferably, in such a flat bag, each fold before the first use of the filter bag in a floor vacuum cleaner have a length which corresponds to at least half of the total expansion of the filter bag in the direction of the fold, preferably substantially the total extension of the filter bag in the direction of the fold. Here, in a particularly preferred embodiment, each fold of the flat bag used before the first use of the filter bag in a floor vacuum cleaner a fold height between 3 mm and 50 mm, preferably between 5 mm and 15 mm, and / or a fold width between 3 mm and 50 mm, preferably between 5 mm and 15 mm. Such flat bags are from the EP 2 366 321 A1 known and represent embodiments of flat bags, which are particularly suitable for all previously described inventive method for optimizing the question Staubsaugsystems.

Further, each surface fold of the filter bag used may have areas lying in the surface of the filter bag wall and areas protruding beyond the surface of the filter bag wall and deployable in the suction mode, the floor vacuum cleaner having a rigid wall filter bag housing space At least one first spacer means is provided on the walls of the filter bag containment space such that it spaces the areas of at least one surface fold away from the wall of the filter bag containment space and at least one second standoff means is provided to define the deployed portions of the at least one surface fold spaced from the wall of the filter bag receiving space.

In the development described in the last paragraph, the height of the first and / or the second spacer means with respect to the wall of the filter bag receiving space in a range of 5 mm to 60 mm, preferably from 10 mm to 30 mm lie.

By providing this particular spacing device (s) for the areas of surface fold (s) lying in the surface of the filter bag wall and the particular spacer means for the areas of surface folding that protrude over that area, the surface fold may unfold to such an extent Most of the surface of the surface folding forming filter material is flowed. This increases the effective filter area of the filter bag (as opposed to use in a conventional vacuum cleaner) so that the dust holding capacity of the filter bag can be further increased with higher separation efficiency and longer service life over this conventional device. Such spacer devices are therefore particularly suitable for the optimization method according to the invention.

The above-described methods can also be further developed by using an engine / blower unit whose motor / blower characteristic curve is provided such that at aperture 0 a negative pressure of between 6 kPa and 23 kPa, preferably between 8 kPa and 20 kPa, most preferably between 8 kPa and 15 kPa, and a maximum air flow of at least 50 l / s, preferably at least 60 l / s, most preferably at least 70 l / s.

Motor-blower units with such a motor-fan characteristic have surprisingly led to a vacuum cleaning system with a particularly low electrical power consumption.

According to another embodiment of all the methods described above, a filter bag in the form of a flat bag can be used for optimizing, and a bottom vacuum cleaner with a filter bag receiving space with rigid walls are used, wherein the filter bag receiving space has a closable by a flap opening with a predetermined opening area the filter bag is inserted into the filter bag accommodation space, and wherein the ratio of the area of a rectangle corresponding to the opening area and the area of the filter bag is greater than 1.0.

If the opening area in relation to the surface of the filter bag satisfies this relation, then it is ensured that the filter bag can be introduced into the filter bag receiving space essentially completely unfolded. An overlap of the two individual layers or an overlap of one of the two individual layers with itself is thus avoided. It is from the beginning of the suction to (for this filter bag) the majority of the entire filter surface of the filter bag available and the filter properties of the filter bag, especially the achievable for the filter bag dust holding capacity with high separation efficiency and long life, are thus optimally utilized from the beginning.

Also, according to a refinement of all the above-described methods for optimizing, a filter bag in the form of a flat bag can be used, and a floor vacuum cleaner with a rigid wall filter bag receiving space can be used, wherein the ratio of the receiving volume of the filter bag in the filter bag receiving space to the maximum receiving volume of the filter bag greater than 0.70, preferably greater than 0.75, most preferably greater than 0.8.

If a filter bag accommodating space is designed such that the filter bag provided for it fulfills the above-mentioned conditions, then it is ensured that the entire filter surface of the filter bag is available during the entire suction operation (until the bag is changed) and thus the filter bag becomes available is filled optimally during operation. The filter properties of the filter bag, in particular the dust absorption capacity achievable for the filter bag with high separation efficiency and long service life, are thus optimally utilized until the filter bag is changed.

Advantageously, in the two developments described last, the ratio of the surface of the filter bag receiving space and the surface of the filter bag may be greater than 0.90, preferably greater than 0.95, most preferably greater than 1.0. Are filter bag receiving space and provided for him filter bag designed so that this condition is met, then both are particularly advantageous matched, so that the filter properties of the filter bag, in particular the dust absorption capacity achievable for the filter bag with high separation efficiency and a long service life, are optimally utilized.

All of the above-described methods can be developed so that the components are matched to one another so that with empty filter bag results in an airflow curve at the aperture 0, a negative pressure between 10 kPa and 25 kPa, preferably between 10 kPa and 20 kPa, most preferably between 10 kPa and 15 kPa, and a maximum air flow of at least 35 l / s, preferably of at least 40 l / s, most preferably at least 45 l / s, is generated and / or that the components are matched to one another such that at 400 For a diaphragm 0, a negative pressure between 10 kPa and 25 kPa, preferably between 10 kPa and 20 kPa, most preferably between 10 kPa and 15 kPa, and a maximum air flow of at least 30 l / s, preferably of at least 35 l / s, most preferably at least 45 l / s.

Surprisingly, it has been shown that such optimized systems both very well dissolve the dust from the substrate (especially on carpet) and ensure good transport of the dissolved dust into the vacuum cleaning system.

All of the above-described methods can be further developed by optimizing the inner diameter of the connecting piece so that it is greater than the smallest inner diameter of the pipe and / or hose connection, in particular less than or equal to the largest inner diameter of the pipe and pipe connection / or hose, is.

This will prevent the spigot from introducing an additional restrictor into the system, thereby reducing airflow. An inner diameter which is larger than the largest inner diameter of the connection of pipe and / or hose, while harming nothing, but brings no further advantage.

The invention also relates to a vacuum cleaner system comprising a floor vacuum cleaner and a filter bag, the floor vacuum cleaner having a motor-blower unit with a motor-blower characteristic, a filter bag receiving space, a connection piece for the filter bag and a floor nozzle, and wherein the Filter bag comprises a filter material made of nonwoven fabric, wherein in the development and / or in the preparation of the system of the method described above was carried out.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1a - 1d:

Versuchsaufbau zur Messung der Luftdaten von Motor-Gebläse-Einheiten nach und analog zu der Norm EN 60312;

Fig. 2a - 2f:

Luftdaten nach und analog zu der Norm EN 60312 für Motor-Gebläse-Einheiten und Staubsaugsysteme gemäß dem Stand der Technik;

Fig. 3:

eine schematische Ansicht einer Filtermaterialbahn und einer Vliesmaterialbahn bei der Herstellung von Filtermaterial für Filterbeutel mit einer Oberflächenfaltung in Form von fixierten Schwalbenschwanzfalten, sowie eine Querschnittsansicht eines Filterbeutels mit einer Oberflächenfaltung, wie sie erfindungsgemäß eingesetzt wird, in welcher die Bemaßung der Oberflächenfaltungen in [mm] angegeben ist;

Fig. 4:

schematische Ansichten des Filterbeutelaufnahmeraums für einen Flachbeutel ohne Oberflächenfaltungen, wie er erfindungsgemäß eingesetzt wird

Fig. 5:

schematische Ansichten des Filterbeutelaufnahmeraums für einen Filterbeutel mit Oberflächenfaltungen, wie er erfindungsgemäß eingesetzt wird; im Schnitt B-B sind der Übersichtlichkeit halber nur die Abstandshaltebügel abgebildet, die der Ein- und Auslassöffnung benachbart sind;

Fig. 6:

eine schematische Ansicht des Filterbeutelaufnahmeraumes für einen Filterbeutel mit Oberflächenfaltungen, wie er erfindungsgemäß eingesetzt wird, welche der Schnittansicht A-A in Fig. 5 mit eingelegtem Filterbeutel entspricht;

Fig. 7:

eine Ansicht des Filterbeutelaufnahmeraums für die bevorzugten Ausführungsformen gemäß Fig. 4 und Fig. 5, in welcher die Bemaßung für diesen Filterbeutelaufnahmeraum angegeben ist; die Abstandshaltebügel sind der Übersichtlichkeit halber weggelassen;

Fig. 8:

Querschnittsansicht des erfindungsgemäß verwendeten Filterbeutels mit Oberflächenfaltung sowie Querschnittsansicht desselben mit Bemaßung;

Fig. 9a - 9f:

schematische Ansichten einer Ausführungsform des Boden-Staubsaugergeräts, die als ein Ergebnis aus der Anwendung des erfindungsgemäßen Verfahrenes resultiert; und

Fig. 10a - 10c:

Luftdaten nach und analog zu der Norm EN 60312 für eine Motor-Gebläse-Einheit und eine Ausführungsform eines Staubsaugsystems als ein Ergebnis aus der Anwendung des erfindungsgemäßen Verfahrnes resultiert.

The figures serve to explain the measuring methods used, the prior art and the invention. Show it:

1a-1d:

Experimental set-up for measuring the air data of motor-blower units in accordance with standard EN 60312;

2a-2f:

Air data in accordance with the standard EN 60312 for motor-blower units and vacuum cleaning systems according to the prior art;

3:

a schematic view of a filter material web and a nonwoven material web in the production of filter material for filter bags with a surface folding in the form of fixed dovetails, and a cross-sectional view of a filter bag with a surface folding, as used in the invention, in which the dimensioning of the surface folds in [mm] indicated is;

4:

schematic views of the filter bag receiving space for a flat bag without surface folds, as used in the invention

Fig. 5:

schematic views of the filter bag receiving space for a filter bag with surface folds, as used in the invention; in section BB, for the sake of clarity, only the spacer stirrups are shown, which are adjacent to the inlet and outlet openings;

Fig. 6:

a schematic view of the filter bag receiving space for a filter bag with surface folds, as used according to the invention, which the sectional view AA in Fig. 5 with inserted filter bag corresponds;

Fig. 7:

a view of the filter bag receiving space for the preferred embodiments according to Fig. 4 and Fig. 5 in which the dimension for this filter bag receiving space is indicated; the spacers are omitted for clarity;

Fig. 8:

Cross-sectional view of the filter bag according to the invention with surface folding and cross-sectional view of the same with dimensioning;

9a - 9f:

schematic views of an embodiment of the floor-vacuum cleaner, resulting as a result of the application of the method according to the invention; and

10a-10c:

Air data according to and analogous to the standard EN 60312 for a motor-blower unit and an embodiment of a vacuum cleaning system as a result of the application of the method according to the invention results.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

According to a first embodiment of the invention, various motor-fan units with different motor-fan characteristics, filter bags of different sizes, different shapes and of different materials, differently shaped filter bag receiving spaces, tubes and tubes with different lengths and inner diameters, in particular conically shaped Hoses, various shaped connecting piece and various floor nozzles combined as long as the efficiency of at least 24%, preferably at least 28%, most preferably at least 32% adjusts the vacuum cleaner in the standard suction on a standard carpet Wilton type with empty filter bag.

According to a second embodiment of the invention, first for various motor-fan units with different motor-fan characteristics, for different filter bags of different sizes, different shapes and of different materials, for differently shaped filter bag receiving spaces, for pipes and hoses of different lengths and Inside diameters, especially conical hoses and determined for differently shaped connecting piece an air flow curve. This is then matched with different floor nozzles so that in the vacuum cleaning system in accordance with standard suction on a standard carpet of the Wilton type with empty filter bag an efficiency of at least 24%, preferably at least 28%, most preferably at least 32%.

According to a third preferred embodiment of the invention, various motor-fan units with different motor-fan characteristics, filter bags of different sizes, different shapes and of different materials, differently shaped filter bag receptacles, tubes and tubes of different lengths and Inner diameters, especially conical hoses, differently shaped connecting piece and various floor nozzles combined until after standard filling of the vacuum system with 400 g of DMT8 standard dust in accordance with standard suction on the standard carpet Wilton, an efficiency of at least 15%, preferably at least 20 %, most preferably at least 25%.

According to further preferred embodiments of the method according to the invention, the optimization is carried out such that, furthermore, the optimization criteria specified in detail in the individual subclaims are met. Any combinations of these criteria are also possible.

In the following, particularly advantageous results of the optimization methods according to the invention, that is to say particularly advantageous combinations for floor-vacuum cleaner devices with filter bags, are presented. In particular, a particularly advantageous optimization with respect to various motor-blower units and with regard to various adjustments of filter bag to filter bag receiving space is shown. The detailed optimization of the pipe, hose, connecting piece and floor nozzle will not be discussed here. The floor vacuum cleaner presented below always uses the same pipe, hose, connection and floor nozzle. The components used here have proven to be particularly favorable in the optimization experiments. Nevertheless, with the method according to the invention, results could also be found with tubes, hoses, connecting pieces and floor nozzles which are different from these. These results are not explicitly listed here, as this would go beyond the scope.

1. pipe, hose, connecting piece and floor nozzle of the particularly advantageous results of the optimization method according to the invention

All of the floor vacuum cleaners obtained as a result of the optimization process of the present invention presented below have a tube with an inner diameter of 36 mm and a length of 94 cm. The hose used was a 176 cm long, conical hose having an inner diameter of 46 mm at its end facing the filter bag receiving space and an inner diameter of 42 mm at its end facing the pipe. The hose is too Obtain from Guangzhoz Schauenburg-Truplast pants Technoloby Ltd, No 9 Yong'an Street, Pearl River Administration Zone, Nansha District, Guangzhou City, China. The connection of the hose to the filter bag accommodating space will be described below with reference to the filter bag accommodating space with reference to FIG Fig. 9d still explained in detail. The used connecting piece is also in Fig. 9d including its dimensions. Between pipe and hose is a curved pipe piece with handle. The length of this pipe section is 0.4 m, the inner diameter of the pipe of 36 mm is not reduced by the handle. As a floor nozzle, the floor nozzle type RD295 the company Wessel (available to Wesselwerk GmbH, 51573 Reichshof-Wildbergerhütte) was used. The connection piece of the floor nozzle has an inside diameter of 36 mm. The tube with an inner diameter of 36 mm is widened over a length of 30 mm so that it can be pushed over the socket of the floor nozzle, so that the inner diameter of 36 mm is not reduced.

2. Filter bag and filter bag receiving space of the particularly advantageous results of the optimization method according to the invention

As a result of the optimization process according to the invention, two combinations of filter bag and filter bag receiving space turned out to be particularly advantageous.

These two combinations were on the one hand a flat bag without gussets and without surface folds with a space adapted to this space and on the other hand a flat bag with fixed surface folds with an adapted to this space.

The filter material CS50 was used for both filter bags. Spunbond 17 g / m ² , netting 8 g / m ² / meltblown 40 g / m ² / spunbond 17 g / m ² / PP staple fibers 50 to 60 g / this material is a laminate with the structure viewed from the outflow side. m ² / carded staple fiber nonwoven 22 g / m ² . A detailed description of the PP staple fiber layer can be found, moreover, in the EP 1 795 247 A1 , The filter material CS50 can be obtained from Eurofilters NV (Lieven Gevaertlaan 21, Nolimpark 1013, 3900 Overpelt, Belgium). Both the filter bags with and the filter bags without surface folding have the dimensions 290 mm x 290 mm.

The pleats of the surface-folding filter bags were fixed inside the bag by strips of non-woven material. In Fig. 3 It is shown how a fold fixation for dovetail folds can be made. Fig. 3 here shows the top view of a filter material web, which comprises the dovetail folds, and an overlying nonwoven material web, from which ultimately the fleece strips used for folding fixation are formed. From the nonwoven material web (which may for example consist of a spunbonded fabric with 17 g / m ² ) rectangular holes of 10 mm x 300 mm were punched out. The illustrated cross-sectional view is taken along the line AA. It can be seen from this sectional view that the parts of the nonwoven material web which are used for folding fixation are connected to the filter material web by means of weld lines. The fleece stiffener, which fixes the folds, is somewhat exaggerated in the cross-sectional view for reasons of better depictability. In fact, the nonwoven material web lies flat on the filter material web. In the Fig. 3 Furthermore, the distances between the spot welds and the distances between the punched holes as well as the web widths of the filter material web as well as the perforated nonwoven material web and the length of the weld points are given in [mm].

Two layers of this consisting of the two webs filter material are now superimposed and welded to a width of 290 mm to a filter bag; the remaining material of about 20 mm at each edge is cut off.

Further explanations and explanations for folding fixation can also be found in the EP 2 366 321 A1 ,

The filter bags with surface folds were equipped with diffusers. Diffusers in vacuum cleaner filter bags are known in the art. Thus, the variants used according to the present invention in the EP 2 263 507 A1 described. In the present case, these consisted of 22 strips of 11 mm width and 290 mm length. The material used for the diffusers was LT75. LT75 is a laminate with the following construction: Spunbond 17 g / m ² / staple fiber layer 75 g / m ² / Spunbond 17 g / m ² . The layers are ultrasonically laminated using the Ungricht U4026 lamination pattern. The filter material LT75 can also be obtained from Eurofilters NV.

The filter bag receiving space for a flat bag without surface folds has on its insides a grid, which should prevent the filter material conforms flat to the housing wall and can no longer be flowed through. The filter bag receiving space for flat bags with surface folds is characterized by larger bow-shaped ribs which intervene between the surface folds of the filter bag to support a folding out of the folds. Apart from the bow-shaped ribs of the filter bag receiving space for both versions has the same dimensions.

In Fig. 4 are schematic representations of the filter bag receiving space for a filter bag without surface folds shown. Fig. 4 shows the filter bag receiving space in plan view. In this plan view, it has a shape of a square with a side length of 300 mm. Fig. 4 also shows sectional views along the lines AA and BB. As in Fig. 4 can be seen, the filter bag receiving space has a maximum height of 160 mm. In Fig. 7 are even more heights of in Fig. 4 indicated Filterbeutelaufnahmeraums indicated. The shape describing the interior walls of the filter bag containment space is reminiscent of the shape of a pillow. A flat bag without surface folds takes exactly a pillow shape during the suction operation. In this sense, it should also be understood that the filter bag receiving space has a shape that approximately corresponds to the shape of the envelope of the filled filter bag.

In Fig. 4 In addition, a grid is shown. In this embodiment, the grid has a wall distance of about 10 mm. This ensures a free circulation of the cleaned air in the filter bag accommodation space.

Fig. 5 Fig. 3 is a schematic representation of the filter bag receiving space for a surface-folding filter bag. The inner dimensions of the filter bag accommodating space are the same as those of the filter bag accommodating space according to FIG Fig. 4 , In that regard, here too on the dimensions in Fig. 7 to get expelled. A flat bag with fixed surface folds also assumes a pillow shape during the suction operation, so that the filter bag receiving space has a shape that approximately corresponds to the shape of the envelope of the filled filter bag.

Instead of a grid (as in the case of flat bags without surface folding, see Fig. 4 ), the filter bag receiving space (for flat bags with surface folding) has bow-shaped ribs of different height. In this embodiment, a device in the form of a small grid is further provided in the region in front of the outlet opening, which prevents the filter bag from being sucked into it due to the suction flow in the outlet opening.

Fig. 6 corresponds to the sectional view AA in Fig. 5 , wherein a filter bag with fixed surface folds in the form of dovetails is inserted. The bow-shaped ribs intervene between the surface folds of the filter bag and thus contribute to a development the surface folding at. This is in Fig. 6 shown schematically. At the same time, the filter bag wall is kept at a distance from the wall of the filter bag receiving space so as to ensure a flow through the entire filter surface of the filter bag. As in Fig. 6 it can be seen, the bow-shaped ribs have from outside to inside a height of 10 mm, 15 mm and 15 mm on the side facing away from the grid and from outside to inside on the grid side facing a height of 10 mm, from 20 mm and 35 mm. The fact that the ribs are broken, a free circulation of the purified air is ensured in the filter bag receiving space.

In Fig. 6 Furthermore, the wall of the filter bag receiving space can be seen. The inserted filter bag has a plurality of surface folds, which are shown schematically as partially unfolded. The air to be cleaned is sucked into the filter bag through the inlet opening (indicated by the arrow in the filter bag accommodation space) and sucked out via the outlet of the filter bag receiving space (indicated by the arrow from the filter bag receiving space). In front of the outlet opening is the grille, which prevents the filter bag from blocking the outlet opening.

In Fig. 4 . Fig. 5 . Fig. 6 and Fig. 7 the inlet and the outlet are shown only schematically. The exact dimensions of the inlet and the outlet opening of the filter bag receiving space results from the Fig. 9b to Fig. 9f ,

A model that measures the dimensions of the filter bag containment space Fig. 4 . Fig. 5 and Fig. 7 exactly reproduced can be obtained from Eurofilters NV.

In Fig. 8 Figure 3 is a cross-sectional view of the surface-finned filter bag used in accordance with the invention and a cross-sectional view of the same with dimensioning.

3. Motor-blower unit of the particularly advantageous results of the optimization method according to the invention

The motor / blower unit used was the Domel KA 467.3.601-4 engine / blower unit (available from Domel, doo Otoki 21, 4228 Zelezniki, Slovenija). By controlling the mains voltage by means of a transformer motor-blower units were simulated with different average power consumption. In Fig. 10a For example, the air data for the motor-blower unit with an average power consumption of 340 W are shown.

Table 1 also shows the characteristics for further average power consumptions of this motor-blower unit, namely for 425 W, 501 W, 665 W and 825 W. In Table 1 are also specific air data for in the soil vacuum cleaner devices according to the Technology used engine-blower units shown (see also Fig. 2a and Fig. 2d ). <b> Table 1: </ b> Special Air Data of Motor-Blower Units (Invention and Prior Art) Domel KA 467.3.601-4 Miele MRG 546-42 / 2 Siemens BSH hB136 Specific values average power consumption P _1m [W] 340 425 501 665 825 1161 717 Max. Vacuum box h _max [kPa] 11.8 14.0 15.7 19.1 22.0 32.3 19.4 Max. airflow q _max [l / s] 53.8 59.3 63.7 70.8 77.2 61.8 57.6 Max. air output P _2max [W] 157 206 249 337 424 516 294 Max. efficiency η _max [%] 40.5 42.3 43.3 44.4 44.6 39.9 41.2

Comparing the Domel motor-blower unit with low mean power consumption of 500W and below with the motor-blower units used in the prior art, it will be noted that with similar maximum air flow and similar maximum efficiency they will have lower vacuum and produce a lower maximum air output than the prior art units. By contrast, Domel's Motor Blower units, which operate at a line voltage that results in an average power consumption of over 600W, show significantly higher maximum airflow and higher maximum airflow than the unit used by Siemens. Compared to Miele's motor-blower unit, whose average power consumption is significantly higher than that of the two Domel units, there is a significantly lower maximum vacuum and a higher maximum airflow, resulting in a lower maximum airflow overall. However, the maximum efficiency achieved with the Domel units is higher than the maximum efficiency of the Miele unit.

4. Floor vacuum cleaner devices as particularly advantageous results of the optimization method according to the invention

FIGS. 9a to 9f show the schematic structure of soil vacuum cleaner devices, which have been found to be particularly advantageous from the optimization process according to the invention.

In Fig. 9a In particular, the filter bag receiving space (see also Fig. 4 to Fig. 7 ). As in particular in Fig. 9b is shown on this filter bag receiving space on the one hand, the hose of the vacuum cleaner (with handle, pipe and floor nozzle) on the in Fig. 9c and 9d connected in detail connector shown.

In the lower part of the fitting according to Fig. 9d the hose provided with a corresponding counterpart is connected. How to form this counterpart, inevitably results from the fitting according to Fig. 9d and the fact that the inner diameter of the hose is 46 mm. The upper part of the fitting according to Fig. 9d is the connection piece for the filter bag. At these, the holding plate and the inlet opening of the filter bag to be adjusted so that the filter bag can be placed airtight in the filter bag receiving space.

As is also apparent Fig. 9b results in the connection of the filter bag receiving space to the motor-blower unit on the in Fig. 9e and 9f shown in detail connector. The motor-blower unit is installed in a sound-absorbing housing whose construction is made of Fig. 9a results. The plate of the silencer housing, to which the motor-blower unit is attached, was made of aluminum with the thickness of 5 mm. Aluminum plates of 2 mm thickness were used for the other panels of the soundproof enclosure. Was dampened this case (apart from the in Fig. 9a shown openings) with acoustic foam in a thickness of 25 mm. It goes without saying that in the case of a series apparatus, the filter bag accommodation space and the sound insulation unit with integrated motor / blower unit are provided in a single housing with an exhaust opening into the surroundings. From such a housing was in the in Fig. 9a apart from the prototypes shown.

FIGS. 9c to 9f Fig. 11 are technical drawings of a concrete configuration of the connection of the filter bag accommodating space to the hose and to the motor-blower unit used in the present invention. These technical drawings allow an immediate replica of the fittings. In addition to this embodiment, any other configurations are possible as long as the internal dimensions for the air ducts are not changed (in particular the air ducts in the fittings according to Fig. 9d and Fig. 9e ).

Table 2 shows specific air data, partly derived from the Fig. 2b and Fig. 2e for the state of the art and out Fig. 10b according to the invention as described above. In addition, this table gives specific air data for further embodiments of the invention for floor-vacuum systems, in particular when using motor-blower units of other average power consumption. <b> Table 2: </ b> Special air data with empty filter bag (invention and prior art) Underground vacuum cleaner according to the invention, filter bags with surface folds According to the invention vacuum cleaner, filter bag without surface wrinkles Miele S5 ecoline HS 11 S5310 Siemens Z5.0 VSZ5GP X2 Specific values average power consumption P _1m [W] 348 430 517 674 829 429 511 832 1216 662 Max. Vacuum box h _max [kPa] 12.5 14.6 16.5 19.5 22.9 14.2 15.9 22.5 29.2 18.1 Max. airflow q _max [l / s] 43.9 47.6 50.8 56.2 61.3 47.0 50.6 61.0 41.0 38.1 Max. air output P _2max [W] 138 174 211 276 354 167 202 347 305 176 Max. efficiency η _max [%] 36.5 37.0 37.6 37.6 39.1 35.8 35.8 38.1 24.7 25.0 at aperture 40 mm input P ₁ [W] 408 504 607 805 1007 499 602 999 1346 789 Vacuum box h [kPa] 1.6 1.8 2.1 2.6 3.1 1.8 2.1 3.1 1.7 1.5 airflow q [l / s] 38.4 41.6 44.5 48.7 53.0 40.9 43.9 52.5 38.6 35.0 air output P ₂ [W] 59 76 91 123 160 75 91 159 58 48 efficiency η [%] 14.4 15.1 14.9 15.3 15.9 15.1 15.2 15.9 4.3 6.0 with floor nozzle on hard floor input P ₁ [W] 408 504 607 805 1006 497 602 997 1341 785 Vacuum box h [kPa] 1.6 1.9 2.1 2.7 3.3 2.4 2.2 3.7 2.6 2.0 airflow q [l / s] 38.1 41.5 44.4 48.4 52.3 39.2 43.4 50.9 37.3 33.9 air output P ₂ [W] 61 78 92 127 170 93 96 185 93 64 efficiency η [%] 15.0 15.4 15.2 15.8 16.9 18.7 16.0 18.6 6.9 8.2 with floor nozzle on Wilton input P ₁ [W] 399 491 587 776 963 491 587 962 1321 749 Vacuum box h [kPa] 4.2 5.1 5.8 7.0 8.4 3.7 5.5 8.2 5.9 5.6 airflow q [l / s] 29.0 31.0 33.0 35.9 38.7 34.9 33.1 38.7 32.7 26.2 air output P ₂ [W] 123 158 192 254 328 128 183 320 192 149 efficiency η [%] 30.8 32.1 32.6 32.7 34.1 26.1 31.1 33.2 14.5 19.9

Table 2 shows in the "Specific values" line the mean power consumption and maximum values for negative pressure, air flow, air flow and efficiency. In addition, the air data are given, which adjust at the aperture 40, the standard suction on hard floor (see EN 60312, Chapter 5.1) and the standard sucking on the standard carpet type Wilton.

It can be seen from the values in Table 2 that for all floor vacuum cleaners according to the invention the efficiency of standard vacuuming on the Wilton standard carpet is considerably higher than in the prior art (apart from the worst embodiment of the invention (429 W average power consumption) with filter bag without surface folding) results in an increase of more than 50% compared to the Siemens system and by more than 100% compared to the Miele system).

Likewise, the efficiency on hard floor for the floor-vacuum cleaning systems according to the invention is substantially higher than for the floor-vacuum cleaning systems of the prior art. In other words, in the vacuum cleaning systems according to the invention, the electrical power used is converted much more efficiently into air power, which makes it possible to achieve the same air output with significantly lower electrical power consumption (for example, Wilton with the system according to the invention (filter bag with surface folding) with a mean electrical power consumption of 491 W achieves a similar air output as the Siemens system at 750 W, the difference being even greater in the Miele system, the Miele system has to use 1321 W to achieve the same air output on Wilton as the 587 W system (filter bag with surface folding).

These greatly improved results compared with the prior art result from the fact that the vacuum cleaning systems according to the invention have not been optimized, as is common in the prior art, to the effect that maximum power is obtained at a given electrical power consumption, but to the extent that the air flow is normal Sucking on the Wilton standard rug is as high as possible.

The available for sucking air flow is the ground-vacuum systems of the invention for all versions on the value of the Siemens system (also for the versions with lower power consumption) and for most versions (at much lower power consumption) above the value of Miele system ..

Table 3 corresponds to Table 2, but with no empty filter bag but a 400 g DMT8 standard dust filled filter bag was inserted into the soil vacuum cleaner. The differences between the state of the art and the floor-vacuum cleaning systems according to the invention are even greater here than in the case of the empty filter bag.

This means that the vacuum cleaning systems according to the invention are far superior not only when just changed filter bag, but beyond the power loss during the vacuuming, so while filling the filter bag, is lower. The service life of the vacuum cleaning systems according to the invention is therefore higher than the service life of the system according to the prior art. <b> Table 3: </ b> Specific air data on filter bag filled with 400 g of DMT8 dust (Invention and Prior Art) Underground vacuum cleaner according to the invention, filter bags with surface folds According to the invention vacuum cleaner, filter bag without surface wrinkles Miele S5 ecoline HS 11 S5310 Siemens Z5.0 VSZ5GP X2 Specific values average power consumption P _1m [W] 340 428 504 667 821 423 485 833 1218 627 Max. Vacuum box h _max [kPa] 12.5 14.5 16.4 19.7 22.1 14.2 16.0 22.1 26.4 17.1 Max. airflow q _max [l / s] 39.6 42.8 45.6 50.2 55.6 39.2 39.2 53.8 37.5 27.7 Max. air output P _{2 max} [W] 124 156 188 250 311 137 156 297 259 119 Max. efficiency η _max [%] 33.7 33.7 34.6 35.3 35.1 30.0 30.2 33.2 21.4 18.7 at aperture 40 mm input P ₁ [W] 395 502 595 798 993 487 575 992 1329 722 Vacuum box h [kPa] 1.3 1.4 1.8 2.2 2.7 1.4 1.4 2.4 1.7 0.8 airflow q [l / s] 35.5 38.5 40.6 44.7 48.9 35.4 35.8 47.8 35.1 26.4 air output P ₂ [W] 44 55 72 94 125 51 48 116 48 19 efficiency η [%] 11.2 10.9 12.0 11.7 12.6 10.5 8.4 11.7 3.6 2.7 with floor nozzle on hard floor input P ₁ [W] 394 499 591 792 988 487 573 984 1324 723 Vacuum box h [kPa] 1.8 2.3 2.6 3.1 3.5 1.4 2.0 3.2 2.6 0.7 airflow q [l / s] 33.9 36.1 38.5 42.2 46.7 35.4 34.4 45.9 33.9 26.6 air output P ₂ [W] 60 81 98 130 161 51 67 148 78 16 efficiency η [%] 15.1 16.3 16.5 16.5 16.3 10.5 11.7 15.1 5.9 2.3 with floor nozzle on Wilton input P ₁ [W] 385 487 576 769 957 476 559 940 1307 702 Vacuum box h [kPa] 3.7 4.4 5.0 6.0 6.8 3.8 4.3 7.3 5.3 3.4 airflow q [l / s] 27.8 29.9 31.7 35.1 38.5 28.8 28.6 35.9 30.0 22.2 air output P ₂ [W] 103 131 159 209 262 108 123 263 156 75 efficiency η [%] 26.7 26.9 27.6 27.2 27.4 22.8 22.1 28.0 12.0 10.7

In Tables 4 and 5, the losses that result when installing the motor-blower unit in a floor vacuum cleaner, are shown; in Table 4 for the empty filter bag bottom vacuum cleaner and in Table 5 for the floor vacuum cleaner with a vacuum cleaner bag filled with 400 g DMT8 standard dust.

From Table 4 it follows immediately that in the vacuum cleaning systems according to the invention, the characteristic losses of the motor-blower unit used in the vacuum cleaner device are much lower than in the prior art. The characteristic losses are the losses for the maximum air flow, for the maximum air power and for the maximum efficiency. The maximum negative pressure and the average power consumption changes only insignificantly both in the system according to the invention and in the systems according to the prior art. <b> Table 4: </ b> Losses due to the installation of the motor-blower units in the vacuum cleaner when the filter bag is empty (invention and state of the art) Efindungsgemäßer vacuum cleaner, filter bag with Obeflächenfalten According to the invention vacuum cleaner, filter bag without surface wrinkles Miele S5 ecoline HS 11 S5310 Siemens Z5.0 VSZ5GP X2 Losses (measured values of vacuum cleaner minus measured values of motor) Δ mean power consumption ΔP _1m [W] 8th 5 17 10 4 4 10 7 56 -56 Δ max. Vacuum box Δh _max [kPa] 0.6 0.6 0.8 0.4 0.9 0.2 0.2 0.5 -3.1 -1.3 Δ max. airflow Δq _max [l / s] -9.9 -11.6 -12.8 -14.6 -15.9 -12.3 -13.1 -16.2 -20.9 -19.5 Δ max. air output ΔP _{2 max} [W] -19 -32 -38 -61 -70 -39 -47 -77 -211 -118 Δ max. efficiency Δη _max [%] -4.0 -5.3 -5.7 -6.7 -5.5 -6.4 -7.5 -6.5 -15.2 -16.2 Percentage losses input ΔP _{1 m} [%] 2 1 3 1 0 1 2 1 5 -8th Δ max. Vacuum box Δh _max [%] 5.5 3.9 5.1 2.1 4.0 1.5 1.2 2.1 -9.5 -6.6 Δ max. airflow Δq _max [%] -18.4 -19.6 -20.2 -20.7 -20.6 -20.7 -20.6 -20.9 -33.8 -33.9 Δ max. air output ΔP _{2 max} [%] -12 -16 -15 -18 -16 -19 -19 -18 -41 -40 Δ max. efficiency Δη _max [%] -9.8 -12.6 -13.2 -15.2 -12.4 -15.2 -17.2 -14.6 -38.2 -39.3

This shows that the adaptation of the motor / blower unit to the other components of the vacuum cleaning system in the systems according to the invention also contributes to the superiority of these systems over the prior art.

The same can be found in Table 5. This means that the motor-blower units of the vacuum cleaning systems according to the invention are better adapted to the other components of the system not only with just changed filter bag, but that this behavior is guaranteed even during the vacuuming, ie during filling of the filter bag. <b> Table 5: </ b> Losses due to installation of the motor-blower units in the vacuum cleaner with filter bag filled with 400 g of DMT8 dust (invention and prior art) Underground vacuum cleaner according to the invention, filter bags with surface folds According to the invention vacuum cleaner, filter bag without surface wrinkles Miele S5 ecoline HS 11 S5310 Siemens Z5.0 VSZ5GP X2 Losses (measured values of vacuum cleaner minus measured values of motor) Δ mean power consumption ΔP _{1 m} [W] 0 3 3 2 -4 -2 -16 7 57 -90 Δ max. Vacuum box Δh _max [kPa] 0.6 0.5 0.7 0.7 0.1 0.2 0.2 0.1 -5.9 -2.3 Δ max. airflow Δq _max [l / s] -14.2 -16.5 -18.1 -20.6 -21.6 -20.1 -24.5 -23.4 -24.3 -30.0 Δ max. air output .DELTA.P _{2 max} [W] -33 -50 -61 -87 -113 -69 -93 -127 -258 -175 Δ max. efficiency Δη _max [%] -6.8 -8.6 -8.7 -9.1 -9.5 -12.3 -13.1 -11.4 -18.5 -22.5 Percentage losses Δ mean power consumption ΔP _{1 m} [%] 0 1 1 0 -1 0 -3 1 5 -13 Δ max. Vacuum box Δh _max [%] 5.5 3.7 4.5 3.5 0.6 1.2 1.5 0.3 -18.3 -11.6 Δ max. airflow Δq _max [%] -26.5 -27.8 -28.4 -29.1 -28.0 -33.9 -38.5 -30.3 -39.3 -52.0 Δ max. air output ΔP _{2 max} [%] -21 -24 -25 -26 -27 -33 -37 -30 -50 -60 Δ max. efficiency Δη _max [%] -16.7 -20.3 -20.1 -20.4 -21.2 -29.0 -30.3 -25.5 -46.5 -54.7

Claims (22)

A method of optimizing a vacuum cleaning system with a floor vacuum cleaner and a filter bag, the floor vacuum cleaner comprising an engine / blower unit having an engine fan characteristic, a filter bag receiving space, a hose, a pipe, a filter bag spigot and a floor nozzle and wherein the filter bag comprises a non-woven fabric filter material, comprising the step of: Matching of
Motor fan characteristic and
Size, shape and material of the filter bag and
Size and shape of the filter bag receiving space and
Length and inside diameter of the tube and length and inside diameter of the tube and
Inner diameter of the connecting piece and
floor nozzle, in such a way that in the vacuum cleaning system in accordance with standards on a standard carpet of the Wilton type with an empty filter bag, an efficiency of at least 24%, preferably at least 28%, most preferably at least 32%, is established, wherein the standard suction according to the standard EN 60312 is performed and the Wilton standard carpet is provided in accordance with standard EN 60312. Method according to claim 1, in which first of all an airflow curve is determined from the motor / blower characteristic and the size, shape and material of the filter bag and the size and shape of the filter bag receiving space and inner diameter of the tube and inner diameter of the hose, which are coordinated with the floor nozzle. The method according to claim 1 or 2, in which the co-tuning further results in that after standard filling of the vacuum system with 400 g of DMT8 standard dust during standard sucking on the standard carpet Wilton, an efficiency of at least 15%, preferably at least 20%, most preferably at least 25%, with DMT8 standard dust being provided according to standard EN60312. Method according to one of the preceding claims, in which the matching further results in the efficiency reduction between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum system with empty filter bag less than 30%, preferably less than 20%, most preferably less than 15%. A method according to any one of the preceding claims, in which said matching further results in the efficiency reduction between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum system being less than 40%, preferably less, for filter bag filled with 400 g of DMT8 standard dust than 30%, most preferably less than 25%. Method according to one of the preceding claims, in which the co-tuning further means that the suction power of the vacuum suction system in the standard suction on the Wilton standard carpet with empty filter bag at least 100 W, preferably at least 150 W, most preferably at least 200 W is. Method according to one of the preceding claims, in which the co-tuning further means that the suction power of the vacuum system at standard sucking on the Wilton standard carpet with 400 g DMT8 standard dust filled filter bag at least 100 W, preferably at least 150 W, most preferably at least 200 W is. Method according to one of the preceding claims, in which the co-tuning further results in the air flow at normal sucking on the standard carpet Wilton with empty filter bag at least 25 l / s, preferably at least 30 l / s, more preferably at least 35 l / s is. Method according to one of the preceding claims, in which the co-tuning further means that the air flow at normal sucking on the Wilton standard carpet at at least 25 l / s, preferably at least 30 l / s, especially when filled with 400 g of DMT8 standard dust filter bag preferably at least 35 l / s. Method according to one of the preceding claims, in which is used for matching a filter bag in the form of a flat bag having a first and a second filter bag wall, wherein the first and / or the second filter bag wall having at least five folds, wherein the at least five folds form at least one surface fold whose maximum height before the first use of the filter bag in a floor vacuum cleaner device is smaller than the maximum height corresponding maximum width. A method according to claim 10, wherein each fold of the filter bag used has a length equal to at least half of the total expansion of the filter bag in the direction of the pleat, preferably substantially the total extent of the filter bag in the direction of the plump, prior to the first use of the filter bag in a floor vacuum cleaner Fold, corresponds. Method according to claim 10 or 11, in which each fold of the filter bag used before the first use of the filter bag in a floor vacuum cleaner a fold height between 3 mm and 50 mm, preferably between 5 mm and 15 mm, and / or a fold width between 3 mm and 50 mm, preferably between 5 mm and 15 mm. A method according to any one of claims 10 to 12, wherein each surface fold of the filter bag employed has areas lying in the surface of the filter bag wall and has areas which project beyond the surface of the filter bag wall and are deployable in the suction mode in which the floor vacuum cleaner a filter bag receiving space having rigid walls, wherein on the walls of the filter bag receiving space at least a first spacer means is provided so as to keep lying in the surface of the filter bag wall areas of at least one surface fold from the wall of the filter bag receiving space spaced, and at least one second spacer means is provided in that it keeps the deployed areas of the at least one surface fold away from the wall of the filter bag containment space. The method of claim 13, wherein the height of the first and / or the second spacer means relative to the wall of the filter bag receiving space in a range of 5 mm to 60 mm, preferably from 10 mm to 30 mm. Method according to one of the preceding claims, in which is used for matching a motor-blower unit whose motor-blower characteristic is formed so that at aperture 0, a negative pressure of between 6 kPa and 23 kPa, preferably between 8 kPa and 20 kPa, most preferably between 8 kPa and 15 kPa, and a maximum air flow of at least 50 l / s, preferably at least 60 l / s, most preferably at least 70 l / s. Method according to one of the preceding claims, in which a filter bag in the form of a flat bag is used for matching, and a bottom vacuum cleaner is used with a filter bag containing space with rigid walls, wherein the filter bag receiving space has a closable by a flap opening with a predetermined opening area the filter bag is inserted into the filter bag accommodation space, and wherein the ratio of the area of a rectangle corresponding to the opening area and the area of the filter bag is greater than 1.0. Method according to one of the preceding claims, in which a filter bag in the form of a flat bag is used for matching, and a bottom vacuum cleaner is used with a filter bag containing space with rigid walls, wherein the ratio of the receiving volume of the filter bag in the filter bag receiving space to the maximum receiving volume of the filter bag greater than 0.70, preferably greater than 0.75, most preferably greater than 0.8. The method of claim 16 or 17, wherein the ratio of the surface of the filter bag receiving space and the surface of the filter bag is greater than 0.90, preferably greater than 0.95, most preferably greater than 1.0. Method according to one of the preceding claims, in which the components are matched to one another so that an air flow curve results when the filter bag is empty, in the case of aperture 0 a negative pressure between 10 kPa and 25 kPa, preferably between 10 kPa and 20 kPa, most preferably between 10 kPa and 15 kPa, and a maximum air flow of at least 35 l / s, preferably at least 40 l / s, most preferably at least 45 l / s is generated. Method according to one of the preceding claims, in which the components are matched to one another such that when filled with 400 g of DMT8 dust filter bag results in an air flow curve, at the aperture 0, a negative pressure between 10 kPa and 25 kPa, preferably between 10 kPa and 20 kPa, most preferably between 10 kPa and 15 kPa, and a maximum air flow of at least 30 l / s, preferably at least 35 l / s, most preferably at least 45 l / s. Method according to one of the preceding claims, in which the inner diameter of the connecting piece is chosen so that it is greater than the smallest inner diameter of the connection of pipe and / or hose, in particular less than or equal to the largest inner diameter of the connection of pipe and / or hose , A vacuum cleaner system comprising a floor vacuum cleaner and a filter bag, the floor vacuum cleaner having a motor-blower unit with a motor-blower characteristic, a filter bag receiving space, a hose, a pipe, a connection piece for the filter bag and a floor nozzle, and wherein the filter bag comprises a filter material made of nonwoven fabric, characterized in that for the development and / or production of the system, the method was carried out according to one of the preceding claims.

Images