EP2644077A1 - 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 mutually synchronizing motor-blower-characteristic curve and size, shape and material of a filter bag and size and shape of a filter bag receiving chamber and inner diameter of a connecting piece for the filter bag and floor nozzle, such that an efficiency factor of 30 percent in the dust suction system during standard suction on a Wilton- type standard carpet is adjusted when emptying the filter bag. The standard suction is carried out according to the European standard 60312 and the Wilton-type standard carpet is provided corresponding to the standard. An air flow curve is determined initially from motor-blower characteristic curve and size, shape and material of the filter bag and size and shape of the filter bag receiving chamber, which is synchronized with floor nozzle. An efficiency factor of 20 percent is set after standard filling of the vacuum system with 400 gram DMT 8-standard dust.

Description

FIELD OF THE INVENTION

The invention relates to a method for optimizing a vacuum cleaning system comprising a substantially hose and tube-less vacuum cleaner and a filter bag, wherein the vacuum cleaner a motor-blower unit with a motor-fan characteristic curve, a filter bag receiving space, a connection piece for the filter bag and a floor nozzle and wherein the filter bag comprises a non-woven fabric filter material. 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 relate exclusively to the version: DRAFT DIN EN 60312-1 "Domestic vacuum cleaners - Dry vacuums - Test method for determining the performance characteristics" (IEC 59F / 188 / CDV: 2009) ; German version FprEN 60312-1: 2009 with the release date of 21st December 2009.

Essentially tubular and tubeless vacuum cleaner:

The term essentially hose and tubeless vacuum cleaner device is used in the present case to distinguish it from the so-called floor vacuum cleaner, which is a housing which is movable on rollers and / or skids on the ground and in which a motor-blower unit and the dust collection room located. The housing is connected in such a floor vacuum cleaner device via a long hose with a long tube, at the end of the suction nozzle, usually in the form of a replaceable floor nozzle attached. These floor vacuum cleaners are not the subject of the present invention. 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. In the floor vacuum cleaner device, the tube is also referred to as a suction tube and the hose as a suction hose.

An example of a substantially hose and tube-less vacuum cleaner apparatus encompassed by the present invention, on the other hand, is the hand-held vacuum cleaner (or hand-held vacuum cleaner). It consists of a housing with motor-blower unit and filter bag receiving space with a filter bag. At one end of the housing is a handle. At the other end, a floor nozzle is exchangeable over a very short pipe. When vacuuming the floor, the housing together with the floor nozzle is moved back and forth and only the floor plate and the rollers of the floor nozzle touch the floor. Such an arrangement does not require a hose and a long pipe; typically the pipes or connecting pipes used in such devices are not longer than 0.4 m).

Other essentially tubular and tubeless vacuum cleaners encompassed by the present invention belong to a group of upright vacuum cleaners.

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. Included in the invention are now upright vacuum cleaners in which the total length of hose and / or pipe is less than 0.5 m. 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).

Upright vacuum cleaners of the group whose total length of hose and / or pipe is greater than 0.5 m, however, are not encompassed by the present invention.

Another example of a vacuum cleaner, which is almost completely tubular and almost tubular, encompassed by the present invention is the compact vacuum cleaner. This consists of a housing with motor-blower unit and filter bag receiving space and filter bag, which is mounted directly on the floor nozzle, or in which a floor nozzle is integrated. This housing is connected to a handle with a handle.

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):

To determine this so-called air data, the essentially hose and tube-less vacuum cleaner with filter bag according to EN 60312 (see especially EN 60312, Chapter 5.8 air data) is measured. The hand-held vacuum cleaner without a floor nozzle by means of an adapter directly to a measuring box, as in EN 60312, Chapter 7.2.7. is described, connected. The Upright vacuum cleaner and the compact vacuum cleaner are connected with a floor nozzle, ie like a brush vacuum cleaner, as described in chapter 5.8.1 of EN 60312.

Fig. 1a shows how a hand-held vacuum cleaner according to the present invention is to be connected to the measuring box. Fig. 1 b to Fig. 1 e are technical drawings of a concrete design of the connection to the measuring box, which are suitable for immediate reproduction. In addition to this embodiment, any other configurations are possible as long as the internal dimensions for the air ducts are not changed (for example, the radius of 20 mm in Fig. 1 b "detail 02" or the inner diameter of the fitting in Fig. 1 c "detail 05).

Fig. 1i and Fig. 1j show a schematic representation of the adapter, as it was used for the known from the prior art hand-vacuum cleaner Vorwerk VK140. The adapter part, which in Fig. 1j is shown via the adapter part, which in Fig. 1 b shown connected to the measuring box. To the adapter according to Fig. 1i It should be noted that the inner diameter of the tubular part is 33 mm.

Furthermore, in both drawings and the intake manifold for standard filling of the vacuum system to see (see below the section "Normally filling the vacuum with 400 g DMT8 standard dust"). The inner diameter can in the case of the hand-vacuum cleaner of the invention Fig. 1 c be removed. In the case of the adapter in Fig. 1i it is 16 mm. For the measurements of the air data, this intake manifold is hermetically sealed. In connection with the present invention was Only the measuring box version B (see chapter 7.2.7.2, fig. 20c) is 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.

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 linear interpolation between the measuring points for determining the airflow curve prescribed in the standard EN 60312 is a very good approximation in the case of radial blowers and is therefore always used here when the radial-type motor-blower unit is. 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 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 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. 1f to Fig. 1g and Fig. 1b 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. 1f 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 in Fig. 1f "detail 02" and the conical extension of the air duct from 35 mm to 40 mm in Fig. 1g "detail 10"). The motor-blower unit according to the prior art, ie the unit of the hand-vacuum cleaner Vorwerk VK140, is correspondingly connected 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 characteristic curve M with the x-axis in turn defines the maximum airflow q _max achievable by the motor-blower 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 P _{2max of} the motor-blower unit. 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 hand-held vacuum cleaner 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 without floor nozzle. In compact vacuum cleaners and Upright vacuum cleaners, the floor nozzle can not be separated from the unit or is an integral part of the unit. In these cases, the efficiency reduction is defined as the difference between the maximum efficiency of the motor-blower unit and the maximum efficiency of the vacuum cleaning system with empty filter bag and with floor nozzle.

The efficiency reduction is a measure of the losses of the vacuum cleaning system The efficiency reduction is given in [%].

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:

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. In the case of a hand-held vacuum cleaner this is then without floor nozzle with appropriate adapters to the measuring box, version B, for measuring the air data according to EN 60312, Chapter 5.8, connected with panel 8 (see Fig. 1i . 1j and 1 b for the hand vacuum cleaner Vorwerk VK 140 according to the prior art and Fig. 1a for the hand-vacuum cleaner devices according to the invention). If it concerns a compact vacuum cleaner or an upright vacuum cleaner covered by the invention, these are connected to the measuring box like a brush vacuum cleaner, as described in chapter 5.8.1 of EN 60312.

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 is not changed compared to the dust collection measurement. 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 DMTB standard dust:

The standard filling of the vacuum cleaning system with 400 g DMT8 standard dust is carried out according to chapter 5.9 of EN 60312. The adapters used for the various vacuum cleaners are in Fig. 1i (Prior art) and Fig. 1c (Invention) and described above in connection with these figures. Likewise, the DMT8 standard dust must 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 formed on the three-dimensional edge. be determined. 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 having an edge length equal to the root of the sum of the squares of maximum length and maximum width of the filter bag satisfies 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.

In particular, 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, in particular if the filter bag accommodation space is of complicated geometric shape, alternatively the surface of a parallelepiped body completely enclosing the filter bag accommodation space can be determined; the surface of such a body is obtained, for example, if one determines the surface of a cuboid with the edge lengths which correspond to the maximum extent of the actual filter bag receiving space in the length, width and height direction (length, width and height directions are of course orthogonal to one another) ,

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 substantially hose and tube-less 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 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. For currently available devices that are touted as ecological devices with reduced power consumption, the power consumption is in the range of about 900 W.

Such an optimized vacuum cleaning system is, for example, the Vorwerk VK 140 vacuum cleaner system. With an empty vacuum cleaner filter bag, it can achieve a dust absorption in accordance with standard EN 60312 for the Wilton standard carpet of about 84%. It should be noted, however, that the good dust absorption values come about through the support of the electric motor driven floor nozzle. The power consumption of the floor nozzle must be added to the electrical power consumption of the vacuum cleaner to be able to assess the performance and efficiency of the device. Fig. 2a shows the air data of the motor-blower units used in the Vorwerk VK 140 vacuum system, Fig. 2b show the air data for this vacuum cleaning system with empty filter bag and Fig. 2c the air data for this vacuum cleaner system with filter bag filled with 400 g DMT8 dust. These measurements were carried out with the original accessories supplied by Vorwerk to this vacuum cleaner and the original filter bags. The data obtained will be discussed below in connection with the data for the vacuum cleaning systems according to the invention.

In view of this state of the art, the object of the invention is to optimize vacuum cleaning systems consisting essentially of tubular and tubular vacuum cleaners and filter bags in such a way that the electrical power consumption of the vacuum cleaner of the system can be significantly reduced without the dust receptacle according to EN 60312 is affected.

BRIEF DESCRIPTION OF THE INVENTION

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

In particular, a method for optimizing a vacuum cleaning system with a substantially hose and tube-less vacuum cleaner and a filter bag, wherein the substantially hose and tube-less vacuum cleaner a motor-blower unit with a motor-fan characteristic curve, a filter bag receiving space, a connecting piece for the filter bag and a floor nozzle, and wherein the filter bag comprises a non-woven fabric filter material, provided with the following step:

Matching the motor-fan characteristic and size, shape and material of the filter bag and size and shape of the filter bag receiving space and the inner diameter of the connecting piece for the filter bag and floor nozzle, such that in the vacuum cleaner in the standard suction on a standard carpet Wilton type with empty Filter bag an efficiency of at least 30%, preferably at least 33%, most preferably at least 36%, adjusted, wherein the standard suction according to the standard EN 60312 is performed and the standard carpet Wilton type according to the standard EN 60312 is provided.

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 an electrical power of about 400 watts, a dust absorption according to EN 60312 in the standard Wilton carpet of 80% with a pushing force of 32 N can be realized.

With only slightly better dust absorption of 84%, a Vorwerk VK140 has a power consumption of 942 W for the vacuum cleaner and an additional 130 W for the electric brush. The electrical power consumption of the vacuum cleaning system optimized with the method according to the invention over the Vorwerk VK 140 can be reduced by 63%.

The method according to the invention can be developed in such a way that first of all an airflow curve is determined from the motor-blower characteristic and size, shape and material of the filter bag and size and shape of the filter bag receiving space, which is matched to the floor nozzle so that when sucking on the standard carpet Wilton achieves the highest possible efficiency. This development represents a particularly efficient implementation of the method described above.

All of the above-described methods can also be developed in such a way that the matching leads to the fact that after standard filling of the vacuum system with 400 g DMT8 standard dust in accordance with standard suction on the standard carpet Wilton, an efficiency of at least 20%, preferably at least 23 %, 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 such that the matching results in that the efficiency reduction between the maximum efficiency of the motor-blower unit and the maximum Efficiency of the vacuum system with empty filter bag and without floor nozzle less than 15%, preferably less than 13%, most preferably less than 10%.

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

In accordance with another embodiment, in all of the previously described methods, the 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 in the case of a filter bag filled with 400 g DMT8 standard dust and without a bottom nozzle %, preferably less than 30%, most preferably less than 25%.

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 suction system in the standard vacuuming on the Wilton standard carpet at 400 g DMT8 standard dust filled filter bag is at least 70 W, preferably at least 100 W, most preferably at least 130 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 20 l / s, preferably at least 23 l / s, particularly preferred is at least 26 l / s and / or that the air flow in the standard suction on the standard carpet of the type Wilton at at least 20 l / s, preferably at least 23 l / s, more preferably at least 25 l / s in filter bag filled with 400 g DMT8 standard dust.

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 substantially tubular and tubular 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 substantially tubular and tubular vacuum cleaner have a length which is at least half of the total extent of the filter bag in the direction of the fold, preferably substantially the total extent of the filter bag in the direction of Fold, corresponds. Here, in a particularly preferred embodiment, each fold of the flat bag used before the first use of the filter bag in a substantially tubular and tubular 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, any surface fold of the filter bag employed 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 substantially hose and tubeless vacuum cleaner having a rigid bag filter bag receiving space wherein at least one first spacer means is provided on the walls of the filter bag containment space such as to keep the areas of at least one surface fold located in the surface of the filter bag wall spaced from the wall of the filter bag containment space, and at least one second spacer means is provided to define the deployed areas which holds at least one surface fold away 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 substantially hose and tube-less vacuum cleaner with a filter bag receiving space with rigid walls are used, the filter bag receiving space a closable by a flap opening with a predetermined Has opening area through which the filter bag is inserted into the filter bag receiving space, and wherein the ratio of the area of a rectangle corresponding to the opening area and the surface of the filter bag is greater than 1.0.

If the opening area in relation to the area of the filter bag satisfies this relation, then it is ensured that the filter bag in the filter bag receiving space is substantially complete unfolded can be introduced. 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 further development of all the above-described methods for optimizing, a filter bag in the form of a flat bag can be used, and a substantially tubular vacuum cleaning device with a filter bag receiving space with rigid walls 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 is 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, especially the achievable for the filter bag dust holding capacity at high separation efficiency and long life, are optimally utilized.

All of the above-described methods can be developed so that the components are matched to one another in an empty filter bag results in an air flow curve at the aperture 0, a negative pressure between 8 kPa and 20 kPa, preferably between 8 kPa and 15 kPa, most preferably between 8 kPa and 13 kPa, and a maximum air flow of at least 40 l / s, preferably of at least 44 l / s, most preferably at least 50 l / s, is generated and / or that the components in such a way be tuned that filled with 400 g of DMT8 dust filter bag results in an air flow curve at the aperture 0, a negative pressure between 8 kPa and 20 kPa, preferably between 8 kPa and 18 kPa, most preferably between 8 kPa and 15 kPa, and maximum air flow of at least 30 l / s, preferably of at least 35 l / s, most preferably at least 40 l / s is generated.

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 substantially hose and tubeless vacuum cleaner and a filter bag, the substantially hose and tubeless vacuum cleaner having an engine / blower unit with a motor / blower characteristic, a filter bag receiving space, a filter bag neck and a bottom nozzle, and wherein the filter bag comprises a non-woven fabric filter material, wherein one of the previously described methods has been used in the development and / or manufacture of the system.

BRIEF DESCRIPTION OF THE FIGURES

Fig. 1a - 1j:

Versuchsaufbauten zur Messung von zur Beschreibung der vorliegenden Erfindung verwendeten Parameter nach und analog zu der Norm EN 60312;

Fig. 2a - 2c:

Luftdaten für eine Motor-Gebläse-Einheit und ein Hand-Staubsaugsystem 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 - 9g:

schematische Ansichten einer Ausführungsform des im Wesentlichen schlauch- und rohrlosen Staubsaugergeräts, die als ein Ergebnis aus der Anwendung des erfindungsgemäßen Verfahrens resultiert; und

Fig. 10a - 10c:

Luftdaten für eine Motor-Gebläse-Einheit und eine Ausführungsform des im Wesentlichen schlauch- und rohrlosen Staubsaugergeräts, die als ein Ergebnis aus der Anwendung des erfindungsgemäßen Verfahrens resultiert.

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

Fig. 1a - 1j:

Experimental constructions for measuring parameters used to describe the present invention according to and analogous to the standard EN 60312;

2a-2c:

Air data for a motor-blower unit and a hand-vacuum cleaner 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 - 9g:

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

10a-10c:

Air data for a motor-blower unit and an embodiment of the substantially hose and tube-less vacuum cleaner, which results as a result of the application of the method according to the invention.

DESCRIPTION OF THE PREFERRED EMBODIMENTS

According to a first embodiment of the invention, different motor-fan units with different motor-fan characteristics, filter bags with different sizes, different shapes and made of different materials, differently shaped filter bag receiving spaces, differently shaped connecting pieces and different bottom nozzles are combined together until in the Vacuum suction system in accordance with standard suction on a standard carpet of the Wilton type with empty filter bag an efficiency of at least 30%, preferably at least 33%, most preferably at least 36%.

According to a second embodiment of the invention, an airflow curve is first determined for various engine-blower units with different engine-blower characteristics, for different filter bags of different sizes, different shapes and materials, for differently shaped filter bag containment spaces, and for variously shaped ports , 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 30%, preferably at least 33%, most preferably at least 36%.

According to a third preferred embodiment of the invention, various motor-fan units having different motor-fan characteristics, filter bags of different sizes, shapes and materials, differently shaped filter bag receiving spaces, variously shaped nozzles and various bottom nozzles are combined together until standard filling of the vacuum cleaning system with 400 g of DMT8 standard dust during standard suction on the Wilton standard carpet, an efficiency of at least 20%, preferably at least 23%, most preferably at least 25%.

In accordance with further preferred embodiments of the method according to the invention, the optimization is carried out in such a way that, furthermore, the optimization criteria that are specified in the individual embodiments Subclaims are specified to be met. Any combinations of these criteria are also possible.

In the following, particularly advantageous results of the optimization methods according to the invention, ie particularly advantageous combinations for essentially hose and tube-less 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 with regard to connecting pieces and floor nozzle is not discussed here. In the following presented mainly hose and tubeless vacuum cleaners always the same connection piece and the same floor nozzle were used. These components have been found in the context of the experiments to be particularly favorable. Nevertheless, with the method according to the invention, results could and can be found with connection nozzles and floor nozzles different from these.

1. Connecting piece and floor nozzle of the particularly advantageous results of the optimization method according to the invention

All substantially tubular and pipeless vacuum cleaners obtained as a result of the optimization process according to the invention, which are presented below, have a connecting piece as described in US Pat Fig. 1e including its dimensions. As a floor nozzle, the floor nozzle type RD295 the company Wessel (available to Wesselwerk GmbH, 51573 Reichshof-Wildbergerhütte) was used.

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, 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. present These consisted of 22 strips of 11 mm wide and 290 mm long. 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 is intended to 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 bow-shaped ribs which engage between the surface folds of the filter bag to assist in unfolding 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 suction, so that the filter bag receiving space has a shape which corresponds approximately 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 the unfolding of the surface folds. 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

elezniki, Slovenija) verwendet. Durch Regelung der Netzspannung mittels eines Transformators wurden Motor-Gebläse-Einheiten mit unterschiedlichen mittleren Leistungsaufnahmen simuliert. In Fig. 10a sind beispielhaft die Luftdaten für die Motor-Gebläse-Einheit mit einer mittleren Leistungsaufnahme von 340 W gezeigt.The engine / blower unit was the Domel KA 467.3.601-4 engine / blower unit (available from Domel, doo Otoki 21, 4228

elezniki, 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 425 W, 501 W, 665 W and 825 W. In addition, in Table 1, specific air data are given for those in the hand-held vacuum cleaner according to the prior art Technology used engine-blower unit shown (see also Fig. 2a ). <b> Table 1: </ b> Specific air data of the motor-blower unit (invention and prior art) Domel KA 467.3.601-4 Original engine Vorwerk Specific values average power consumption P _1m [W] 340 425 501 665 825 890 Max. Vacuum box h _max [kPa] 11.8 14.0 15.7 19.1 22.0 24.2 Max. airflow q _max [l / s] 53.8 59.3 63.7 70.8 77.2 58.8 Max. air output P _2max [W] 157 206 249 337 424 356 Max. efficiency η _max [%] 40.5 42.3 43.3 44.4 44.6 39.1

Comparing the Domel motor-blower unit with low mean power consumption of 500W and below with the motor-blower unit used in the prior art, it is found that with similar maximum air flow and similar maximum efficiency they have lower negative pressure and produce a lower maximum air output than the prior art unit. The Domel motor-blower units, which are operated at a mains voltage, with an average power consumption on the other hand shows a significantly higher maximum airflow than the unit used by Vorwerk.

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

Fig. 9a to Fig. 9g show the schematic structure of hand-vacuum cleaner devices, which have been found to be particularly advantageous from the optimization method according to the invention.

In Fig. 9a . Fig. 9b and Fig. 9c is in particular the filter bag receiving space (see also Fig. 4 to Fig. 7 ). As in Fig. 9c shown, this filter bag receiving space is a connection piece, which is already in detail in Fig. 1 e is shown provided. At this connector is already in the Fig. 1 c shown fittings "detail 03", "detail 04" and "detail 05" and the in Fig. 9f and Fig. 9g shown adapter pieces "detail 14" and "detail 15" the floor nozzle connected.

The upper part of the fitting according to Fig. 1e 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. 9c results in the connection of the filter bag receiving space to the motor-blower unit on the in Fig. 9d and 9e shown in detail connector.

The motor-blower unit is installed in a silencer housing (see Fig. 9a and Fig. 9b ). The construction of the soundproofing enclosure results Fig. 9b , 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. Such a sound insulation unit is provided in all hand-vacuum cleaner devices. It goes without saying that in 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 environment. From such a housing was in the in Fig. 9a apart from the prototypes shown.

Fig. 1c . Fig. 1e . Fig. 9d to Fig. 9g Fig. 11 are technical drawings of a concrete configuration of the connection of the filter bag accommodating space to the floor nozzle 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 inner dimensions of the air ducts are not changed.

Table 2 shows specific air data, partly derived from the Fig. 2b 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 hand-held vacuum systems, particularly when using motor-blower units of other average power consumption.

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. In particular, the air data of the last two lines are of particular interest to the daily use of the vacuum cleaning system.

From the values in Table 2 it follows immediately that for all hand vacuum cleaners according to the invention the efficiency of standard vacuuming on the Wilton standard carpet is considerably higher than according to the prior art. An increase compared to the Vorwerk system results more than 100 %.

Likewise, the efficiency on hard floor for the hand-vacuum cleaning systems according to the invention is much higher than for the hand-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 386 W achieves a similar air output as the Vorwerk system at 936 W). <b> Table 2: </ b> Special air data with empty filter bag (invention and prior art) Inventive compact vacuum cleaner, filter bag with surface wrinkles Inventive compact vacuum cleaner, filter bag without surface wrinkles Vorwerk VK 140 Specific values average power consumption P _1m [W] 267 340 425 506 266 347 438 511 768 Max. Vacuum box h _max [kPa] 9.4 11.6 13.6 15.4 9.2 11.7 13.6 15.3 25.3 Max. airflow q _max [l / s] 44.4 50.4 54.8 58.3 44.4 50.1 54.4 57.3 41.7 Max. air output P _{2 max} [W] 104 145 186 225 101 146 185 219 270 Max. efficiency η _max [%] 35.8 37.8 39.2 39.7 34.8 37.6 39.3 39.5 31.8 at aperture 40 mm input P ₁ [W] 303 401 501 600 303 403 504 598 948 Vacuum box h [kPa] 1.5 1.9 2.3 2.6 1.5 1.8 2.2 2.5 1.9 airflow q [l / s] 37.5 42.2 45.7 48.7 37.0 42.3 45.7 47.9 38.6 air output P ₂ [W] 56 79 103 124 58 76 98 119 67 efficiency η [%] 18.5 19.8 20.5 20.6 19.0 18.9 19.4 19.9 7.1 with floor nozzle on hard floor input P ₁ [W] 303 401 500 600 303 402 502 597 947 Vacuum box h [kPa] 1.6 2.2 2.5 2.9 1.6 2.3 2.6 2.8 2.1 airflow q [l / s] 36.7 40.7 44.6 47.2 36.6 40.0 44.0 47.0 38.2 air output P ₂ [W] 61 90 113 138 60 93 113 129 75 efficiency η [%] 20.1 22.5 22.5 23.0 19.8 23.2 22.6 21.6 7.9 with floor nozzle on Wilton input P ₁ [W] 291 386 478 570 292 384 470 559 936 Vacuum box h [kPa] 4.2 5.4 6.4 7.5 4.2 5.8 6.7 7.5 4.4 airflow q [l / s] 24.8 26.7 28.9 29.9 24.2 25.2 27.7 29.1 34.4 air output P ₂ [W] 103 145 186 225 100 146 185 219 151 efficiency η [%] 35.3 37.5 38.8 39.5 34.4 38.1 39.4 39.2 16.2

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.

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 hand-vacuum cleaner. The differences between the prior art and the manual 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 not only far superior when the filter bag has just been changed, but moreover the performance drop during vacuuming, that is to say during filling of 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) Inventive compact vacuum cleaner, filter bag with surface wrinkles Inventive compact vacuum cleaner, filter bag without surface wrinkles Vorwerk VK 140 Specific values average power consumption P _{1 m} [W] 261 340 427 506 256 341 429 489 710 Max. Vacuum box h _max [kPa] 9.5 12.0 13.9 16.1 9.6 12.0 13.8 15.6 24.0 Max. airflow q _max [l / s] 34.7 36.0 42.9 44.9 31.7 36.0 40.2 42.0 27.9 Max. air output P _{2 max} [W] 83 108 149 181 76 108 138 164 169 Max. efficiency η _max [%] 30.3 30.4 33.3 33.4 28.9 30.8 31.0 31.6 21.8 at aperture 40 mm input P ₁ [W] 295 393 493 593 291 392 495 573 903 Vacuum box h [kPa] 1.2 1.3 1.7 1.9 1.0 1.3 1.5 1.7 1.0 airflow q [l / s] 30.2 32.2 37.7 39.7 28.5 32.1 35.8 37.3 26.8 air output P ₂ [W] 37 40 64 74 28 42 55 64 25 efficiency η [%] 12.6 10.2 12.9 12.5 9.5 10.7 11.1 11.3 2.8 with floor nozzle on hard floor input P ₁ [W] 296 396 495 595 291 394 497 575 903 Vacuum box h [kPa] 0.7 0.4 1.0 1.1 0.8 0.8 1.1 0.8 1.0 airflow q [l / s] 32.3 34.7 39.9 41.8 29.0 33.5 37.0 39.8 26.8 air output P ₂ [W] 21 14 39 47 24 28 42 31 25 efficiency η [%] 7.1 3.6 8.0 7.9 8.2 7.1 8.5 5.4 2.8 with floor nozzle on Wilton, input P ₁ [W] 289 381 472 569 283 375 473 552 895 Vacuum box h [kPa] 3.1 3.8 5.1 6.3 3.2 4.0 4.6 5.5 2.2 airflow q [l / s] 23.4 24.8 27.1 27.5 21.2 23.9 26.9 27.3 25.4 air output P ₂ [W] 72 93 139 172 67 96 123 150 55 efficiency η [%] 25.0 24.4 29.4 30.2 23.8 25.7 25.9 27.1 6.2

In Tables 4 and 5, the losses that result when installing the motor / blower unit in a hand-held vacuum cleaner are shown; in Table 4 for the hand-vacuum cleaner with empty filter bag and in Table 5 for the hand-held vacuum cleaner with a vacuum cleaner bag filled with 400 g of 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 changes only insignificantly both in the system according to the invention and in the system according to the prior art. While the power consumption hardly changes in the system according to the invention, this drops in the Vorwerk system.

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. <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) Inventive compact vacuum cleaner, filter bag with surface wrinkles Inventive compact vacuum cleaner, filter bag without surface wrinkles Vorwerk VK 140 Losses (measured values of vacuum cleaner minus measured values of motor) Δ mean power consumption ΔP _{1 m} [W] 0 0 6 7 14 11 -122 Δ max. Vacuum box Δh _max [kPa] -0.3 -0.4 -0.3 -0.2 -0.4 -0.5 1.1 Δ max. airflow Δq _max [l / s] -3.5 -4.4 -5.4 -3.8 -4.9 -6.3 -17.1 Δ max. air output M '2 max [W] -12 -20 -24 -11 -21 -30 -86 Δ max. efficiency Δη _max [%] -2.7 -3.0 -3.6 -2.8 -2.9 -3.9 -7.3 Percentage losses input Δh _max [%] 0 0 1 2 3 2 -14 Δ max. Vacuum box Δh _max [%] -2.2 -3.2 -1.8 -1.4 -3.1 -2.9 4.5 Δ max. airflow Δq _max [%] -6.4 -7.5 -8.4 -7.0 -8.3 -9.9 -29.1 Δ max. air output ΔP _{2 max} [%] -7 -10 -10 -7 -10 -12 -24 Δ max. efficiency Δη _max [%] -6.6 -7.2 -8.3 -7.0 -6.9 -8.9 -18.7

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 DMT8 dust (invention and prior art) Inventive compact vacuum cleaner, filter bag with surface wrinkles Inventive compact vacuum cleaner, filter bag without surface wrinkles Vorwerk VK 140 Losses (measured values of vacuum cleaner minus measured values of motor) Δ mean power consumption ΔP _{1 m} [W] 0 2 6 1 4 -11 -180 Δ max. Vacuum box Δh _max [kPa] 0.2 -0.1 0.4 0.1 -0.2 -0.1 -0.2 Δ max. airflow Δq _max [l / s] -17.8 -16.4 -18.8 -17.8 -19.1 -21.7 -30.9 Δ max. air output ΔP _{2 max} [W] -49 -57 -68 -49 -68 -85 -188 Δ max. efficiency Δη _max [%] -10.0 -9.0 -9.9 -9.7 -11.3 -11.7 -17.3 Percentage losses Δ mean power consumption ΔP _{1 m} [%] 0 0 1 0 1 -2 -20 Δ max. Vacuum box Δh _max [%] 1.8 -0.5 2.6 1.2 -1.2 -0.5 -0.7 Δ max. airflow Δq _max [%] -33.1 -27.7 -29.5 -33.0 -32.2 -34.1 -52.5 Δ max. air output ΔP _{2 max} [%] -31 -28 -27 -31 -33 -34 -53 Δ max. efficiency Δη _max [%] -24.8 -21.3 -22.9 -24.0 -26.6 -27.1 -44.3

The results obtained for the hand-held vacuum system mean that for a compact vacuum system consisting of the same components, the results for such a system will be even better than for a corresponding hand-held vacuum system, as the Compact Vacuum System is designed to have a shorter connection is provided between the floor nozzle and filter bag receiving space, so that the throttling effect, which can be further reduced by the connection between the floor nozzle and the filter bag receiving space.

Since essentially tubular and tubeless upright vacuum cleaning systems have only a slightly longer connection between floor nozzle and filter bag receiving space compared to hand vacuuming systems, the values for such upright vacuum systems will be only slightly worse than for the hand vacuum system, so that State of the art still a significant improvement can be achieved.

Claims (22)

A method for optimizing a vacuum cleaning system comprising a substantially hose and tubeless vacuum cleaner and a filter bag, the substantially hose and tubeless vacuum cleaner comprising an engine fan unit having an engine fan characteristic, a filter bag receiving space, a filter bag neck, and a bottom nozzle, and wherein the filter bag comprises a filter material made of nonwoven fabric, comprising the step: 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
Inner diameter of the connection piece for the filter bag 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 30%, preferably at least 33%, most preferably at least 36%, 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, which are coordinated with the floor nozzle. Method according to claim 1 or 2, in which the matching up further leads to that after standard filling of the vacuum system with 400 g of DMT8 standard dust in the standard sucking on the standard carpet of Type Wilton, an efficiency of at least 20%, preferably at least 23%, most preferably at least 25% adjusted, the DMT8 standard dust is provided according to the standard EN60312. Method according to one of the preceding claims, in which the co-tuning 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 and without floor nozzle less than 15%, preferably less than 13% , most preferably less than 10%. A method according to any one of the preceding claims, in which the co-tuning 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% for filter bag filled with 400 g DMT8 standard dust and no floor nozzle. , preferably less 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 70 W, preferably at least 100 W, most preferably at least 130 W is. Method according to one of the preceding claims, in which the co-tuning further results in that the air flow in the standard Suction on the Wilton standard carpet with the filter bag empty is at least 20 l / s, preferably at least 23 l / s, particularly preferably at least 26 l / s. Method according to one of the preceding claims, in which the co-tuning further means that the air flow at normal sucking on the standard carpet Wilton at at least 20 l / s, preferably at least 23 l / s, especially when filled with 400 g of DMT8 standard dust filter bag preferably at least 25 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 , the maximum height before the first use of the filter bag in a substantially tubular and tubular 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, prior to first putting the filter bag into a substantially tubular vacuum cleaner, has a length which is at least half of the total expansion of the filter bag in the direction of the fold, preferably substantially the total extent of the filter bag Filter bag in the direction of the fold, corresponds. Method according to claim 10 or 11, in which each fold of the filter bag used before the first operation of the filter bag in a substantially hose and tubeless vacuum cleaner a fold height between 3 mm and 50 mm, preferably between 5 mm and 15 mm, and / or Wrinkle 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, in which each surface fold of the filter bag employed has areas lying in the surface of the filter bag wall and has areas which protrude beyond the surface of the filter bag wall and are deployable in the suction mode, in which they are substantially tubular and vacuumless vacuum cleaner apparatus having a filter bag receiving space with 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 a second Spacer means is provided such that it keeps the deployed portions of the at least one surface fold from the wall of the filter bag receiving space spaced. 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 substantially hose and tube-less vacuum cleaner is used with a filter bag containing space with rigid walls, wherein the filter bag receiving space a closable by a flap opening with a predetermined Has opening area through which the filter bag is inserted into the filter bag receiving space, and wherein the ratio of the area of a rectangle corresponding to the opening area and the surface 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 substantially tubular and tubular vacuum cleaner is used with a filter bag receiving 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 is 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, wherein at 0 a negative pressure between 8 kPa and 20 kPa, preferably between 8 kPa and 15 kPa, most preferably between 8 kPa and 13 kPa, and a maximum air flow of at least 40 l / s, preferably at least 44 l / s, most preferably at least 50 l / s is generated. Method according to one of the preceding claims, in which the components are matched to each other so that at 400 g of DMT8 dust filled filter bag results in an air flow curve, wherein at aperture 0, a negative pressure between 8 kPa and 20 kPa, preferably between 8 kPa and 18 kPa, most preferably between 8 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 40 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 substantially hose and tubeless vacuum cleaner and a filter bag, the substantially hose and tubeless vacuum cleaner having an engine and blower unit with a motor-fan characteristic, a filter bag receiving space, a nozzle 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.

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