EP1868478A1

EP1868478A1 - Vacuum cleaner

Info

Publication number: EP1868478A1
Application number: EP06706421A
Authority: EP
Inventors: Christian Stewen; Uli HÄUSSERMANN
Original assignee: Alfred Kaercher SE and Co KG
Current assignee: Alfred Kaercher SE and Co KG
Priority date: 2005-04-11
Filing date: 2006-01-26
Publication date: 2007-12-26
Anticipated expiration: 2026-01-26
Also published as: DK1868478T3; EP2347690B1; EP2347690A2; DE202006020948U1; PL2347690T3; PL1868478T3; EP2347690A3; DK2347690T3; DE502006009299D1; ATE505123T1; EP1868478B1; DE102005017568A1; ES2361427T3; US20080086835A1; DE102005017568B4; US8186005B2; WO2006108460A1

Abstract

The invention relates to a vacuum cleaner which comprises a dirt collecting container which is provided with a suction inlet and which is fluidically connected, via at least one filter and at least one suction line, to at least one suction unit. Said vacuum cleaner comprises at least one external air inlet which leads into the suction line upstream from the at least one filter, which can be closed by means of at least one closing valve. The closing valve comprises a displaceable valve body which can be placed in a closed position forming one or several sealing lines on at least one valve seat. The at least one sealing line limits a surface which is impinged upon by differential pressure when in the closed position of the closing valve. The aim of the invention is to further develop the vacuum cleaner in such a manner that the at least one closing valve has a simple structure and the at least one filter can be completely cleaned in a short space of time. According to the invention, the square of the entire length of all of the sealing lines is at least 25 times greater than the total size of all of the surfaces limited by the sealing lines, and is impinged upon by differential pressure.

Description

vacuum cleaning

The invention relates to a Saugreinigungsgerät with a dirt collecting container having a suction inlet and is connected via at least one filter and at least one suction line with at least one suction unit in flow communication, and with at least one downstream of the at least one filter in the at least one suction line opening foreign air inlet, the can be closed by at least one closing valve, wherein the at least one closing valve has a movable valve body which rests in a closed position to form at least one valve seat forming one or more sealing lines, wherein the at least one sealing line delimits a surface which in the closed position of the closing valve a differential pressure is applied.

Such Saugreinigungsgeräte can be configured, for example, as a vacuum cleaner or as sweeping vacuum. They have a dirt collecting container, which can be acted upon by one or more suction units with negative pressure, so that forms a suction flow, under the influence of dirt in the dirt collecting container can be sucked. The dirt collector is connected via at least one filter and at least one adjoining suction line with the suction unit in flow communication. The at least one filter makes it possible to separate solids, so for example dirt or dust particles, from the suction flow. During the operation of the vacuum cleaning device, more and more solids accumulate on the filter, so that the filter is an increasing flow resistance and must therefore be cleaned. For this purpose, the at least one filter can be formed counter to that in suction operation. The flow direction can be acted upon by external air, which can flow into the suction line via the outside air inlet downstream of the filter. For example, ambient air can be used as external air or compressed air also stored by the vacuum cleaning device or stored in a reservoir under pressure. During the suction operation, the outside air inlet is tightly closed by the at least one closing valve, which is opened for filter cleaning. The at least one closing valve has a movable valve body which bears tightly against at least one associated valve seat during the suction operation, wherein at least one sealing line is formed between the valve seat and the valve body, along which the outside air inlet is sealed. The at least one sealing line delimits a surface which is subjected to a differential pressure in the closed position of the at least one closing valve.

Such vacuum cleaning devices are known, for example, from DE 298 23 411 U1, in which it is proposed to close off the suction inlet for cleaning the filter, so that a strong negative pressure forms within the dirt collecting container. Subsequently, a closing valve is then opened, thereby cleaning a filter. It can be achieved by an effective cleaning, but this must be completely interrupted the suction operation. In order to counteract this disadvantage, it is proposed in DE 199 49 095 A1 to clean off only a subarea of the filter in each case, so that the suction operation can be maintained over a different subarea. Individual sections of the filter are thus cleaned in succession, without the suction must be interrupted. However, the supply of external air in each case only to a portion of the filter requires a structurally complex mechanism for the closing valve. Object of the present invention is to provide a Saugreinigungsgerät of the type mentioned in such a way that the at least one closing valve designed structurally simple and the at least one filter can be completely cleaned within a short time.

This object is achieved in a Saugreinigungsgerät of the generic type according to the invention that the square of the total length of all seal lines is at least 25 times the total size of all limited by the seal lines, acted upon by differential pressure surfaces.

In the invention, the idea flows into that by providing one or more sealing lines as long as possible, but limit the smallest possible area, when lifting the valve body from the valve seat within a very short time a strong, abrupt onset of external air flow can be provided that on the side facing away from the dirt collecting container of the at least one filter, the negative pressure drops abruptly and the filter is flowed through in the counterflow direction with external air. The sudden pressure increase has the consequence that the filter is mechanically shaken and cleaned, whereby the cleaning can be done within a very short time. The total length of all sealing lines is chosen to be significantly larger than the circumference of a circular area whose surface area corresponds to the area of the surface bounded by the sealing lines. The ratio between the square of the total length of all sealing lines and the size of the total of the sealing lines limited area is according to the invention at least 25 and is thus at least twice as large as in Find that there is only one seal line surrounding a closed circular area whose perimeter is defined by the seal line. In the case of a circular area, the ratio of the square of the length of the sealing line and the size of the circular area gives a value of approximately 12.5, namely four times the number π (3.14).

The area delimited by the at least one sealing line denotes that area which, in the closed position of the closing valve, is acted on by the pressure difference which forms via the closing valve. This surface is delimited by the at least one sealing line, and according to the invention it is provided that, when providing the longest possible sealing line, the area subjected to the differential pressure is chosen as small as possible. Since the surface acted upon by the differential pressure determines the force with which the closing valve is acted upon in its closed position, the mechanical load of the closing valve can be reduced by providing the smallest possible area. This in turn has the consequence that the closing valve may have a small size, and yet on the at least one, as long as possible selected sealing line when opening the closing valve, a strong external air flow can be provided for cleaning the filter.

It is particularly advantageous if the square of the total length of all sealing lines amounts to at least 50 times, preferably more than 100 times, the total size of all the surfaces delimited by the sealing lines. There is thus provided a very long line along which the outside air inlet is sealed. About this seal line can be supplied to the filter external air when opening the closing valve. This makes it possible even with very short-term opening of the closing valve to achieve an effective filter cleaning. For filter cleaning therefore the suction must be interrupted only for fractions of a second. This has the consequence that virtually no interruption of the suction flow occurs at the free end of a suction hose connected to the suction inlet, thus a quasi-continuous suction operation can be maintained with approximately constant suction power, that is with approximately constant suction volume flow. The vacuum cleaning device according to the invention is therefore characterized by a high degree of effectiveness.

The at least one closing valve may have a single sealing line, for example a star-shaped or in the form of the edge of a clover designed seal line with alternating positive and negative curvature.

It has proved to be particularly advantageous if the at least one closing valve has a plurality of sealing lines in the form of closed sealing sections. Thus, for example, two sealing sections can be used which define an outer edge and an inner edge of a surface acted upon by the differential pressure.

The closed sealing sections can be arranged side by side. Preferably, however, the sealing sections form nested sealing rings. Preferably, the sealing rings are arranged concentrically with each other. For example, four sealing rings can be used, which are arranged concentrically to each other, wherein each two sealing rings define an annular, acted upon by the differential pressure surface. In In this case, the total of the sealing lines limited area results from the sum of the two annular surfaces.

The sealing rings can be arranged over their entire circumference at a uniform distance from each other, but it can also be provided that touch individual sealing rings.

Preferably, the sealing sections are designed to be round and form, for example, an oval or a circle.

If only one sealing line is used, it is preferably arranged in one plane. In the case of the use of several sealing lines, however, it can also be provided that the individual sealing lines are arranged in different planes, for example in mutually offset or tilted planes.

In a structurally particularly simple and störungsunanfälligen embodiment of the at least one closing valve, the valve body on a valve disc which is tightly applied to the at least one valve seat with the interposition of at least one sealing line defining a sealing element. The valve disk can be formed very flat, so that the closing valve requires only a very small space.

It is advantageous if the valve disk has at least one, preferably annular passage opening, which is delimited by one or more sealing elements in the closed position of the valve disk. Such a configuration has the advantage that when lifting the valve disk from the valve seat External air for a side adjacent to the valve plate can flow into the suction line, on the other hand, but also through the at least one passage opening of the valve disk. Even if the valve plate lifts only slightly from the valve seat, already a strong external air flow can be achieved. This not only has the advantage that only a small range of motion for the valve disc must be ensured, but this has the advantage that even a very short opening movement is sufficient to abruptly act on the at least one filter with external air and thus an effective To achieve cleaning.

In a particularly preferred embodiment, the at least one valve seat has a plurality of passage openings, which are each delimited by at least one sealing element in the closed position of the valve disk. It can be provided, for example, that the at least one valve seat comprises two concentrically arranged annular through openings over which external air can flow into the suction line when the valve disk is lifted off the valve seat.

The valve body may be pivotably mounted on the at least one valve seat or on a device-fixed part. It is particularly advantageous, however, if the valve body is held displaceably, in particular it can be provided that the valve body is held displaceably in a guide.

The guide is cylindrical in an advantageous embodiment, because this gives the possibility to rotate the valve body about the cylinder axis of the guide, without thereby the opening and closing Bewbewhen movement of the valve body is impaired. By providing a cylindrical guide so the risk is reduced that the valve body tilted.

It can be provided that the at least one closing valve has a guide sleeve into which a guide receptacle dips. The guide sleeve can be arranged on the valve body, preferably the guide sleeve is integrally connected to the valve body.

It is advantageous if the valve body is acted upon by a spring with a closing force. The spring moves the opening when the closing valve from the valve seat lifting valve body back into its closed position as soon as the negative pressure in the suction line downstream of the at least one filter is degraded by the action of the suction unit. The suction unit is in fact during the filter cleaning with the at least one filter in flow communication, so that the inflowing via the closing valve in the suction line foreign air, which briefly acts on the filter in the counterflow direction is sucked from the suction unit. In the closed position, the spring ensures a reliable fixation of the valve body. When opening the closing valve, the spring absorbs the energy of the valve body, brakes it and accelerates it back to its closed position.

The spring may be designed in several parts, in particular in two parts, wherein a longer spring part may have a lower spring constant than a shorter spring part. The shorter spring part with the higher spring constant limits the opening travel of the valve body and thus also the ingress of foreign air. Alternatively it can be provided that a single spring is used, which preferably has a non-linear characteristic, so that the movement of the valve body at the beginning is only slightly and then more inhibited. As a result, when opening the closing valve, a very strong pressure surge can be achieved by which the at least one filter can be cleaned in a very short time.

Alternatively or in addition to the spring can be provided that the valve body is held by a magnetic holder in the closed position. For this purpose, for example, at least one permanent magnet can be used, which reliably holds the valve body in its closed position in the case of pressure differences as they occur during the proper suction operation at the at least one closing valve. If the pressure difference is increased for filter cleaning, the magnetic holder releases the valve body, which then lifts off from the valve seat, so that external air can flow in. The pressure difference can be increased, for example, by the fact that the negative pressure within the dirt collecting container is increased, for example by closing the suction inlet or a suction hose connected to this. Alternatively or additionally, the pressure difference can be increased by supplying external air with overpressure to the at least one closing valve. For this purpose, the vacuum cleaning device may have a pressure accumulator which is filled with a compressor. If external air is released from the pressure accumulator, then the overpressure exerted on the valve body exerts an increased force in the opening direction, which force can no longer be compensated by the magnet holder, so that the at least one closing valve opens. Is the supply of pressurized external air interrupted, then the pressure builds up, and under the action of the magnetic force, possibly supported by the action of a closing spring, the valve body goes back to its closed position.

It is particularly advantageous if the magnet holder comprises an electromagnet. This allows an electrical control of the magnetic holder such that the closing valve maintains its closed position, as long as the solenoid is energized. If the power supply is interrupted, the closing valve opens abruptly.

It has proven to be particularly advantageous to design the electromagnet as an electrostatic magnet. Such Elektrohaftmagente are characterized by a very low magnetic remanence, so that when interrupting the power supply virtually no residual magnetic field is present and therefore the valve body can lift off the valve seat in a very short time.

It can be provided that the at least one closing valve is mechanically actuated. It is advantageous, however, if it is electronically operable. For example, it may be provided that the pressure difference that forms via the filter is detected by means of pressure sensors. The greater the pressure difference, the greater the flow resistance of the filter, and when a predetermined value for the pressure difference is exceeded, the at least one closing valve can be actuated by means of control electronics.

A time-controlled actuation of the at least one closing valve is advantageous. It can be provided that it can be actuated with different time intervals. In particular, after several shorter time periods, a further operation should be provided only after a longer time interval. However, effective filter cleaning can also be achieved with filter cleaning at constant time intervals.

The at least one filter is preferably designed as a folded filter, for example in the form of a filter cartridge or a flat pleated filter.

The vacuum cleaning device may have a plurality of filters, but it has proved to be particularly advantageous if the vacuum cleaning device comprises a single filter. In particular, it can be provided that the filter can be acted upon by external air simultaneously by opening all closing valves over its entire surface.

As already explained, the inventive design of the vacuum cleaning device makes it possible to abruptly increase the negative pressure in the suction line in the area adjacent to the at least one filter, and subsequently the negative pressure is reduced again within a very short time due to the effect of the at least one suction unit. When the at least one closing valve is opened, the valve body can momentarily remain in an open position in order then to change over again into its closed position. However, it is particularly advantageous if, starting from its closed position, the valve body is continuously movable back into its closed position via its open position. In such an embodiment, the valve body performs a continuous movement when opening the closing valve without it remains in its open position. The valve body is greatly accelerated when opening the closing valve and then braked again, so that it reverses its direction of movement and then his again Closed position occupies. The entire movement of the valve body starting from its closed position on the open position back into the closed position can be done in fractions of a second.

In a particularly preferred embodiment, the at least one filter is acted upon by the closing valve for less than 200 ms, in particular for less than 100 ms, with external air. Such loading does not result in any appreciable interruption of the suction operation for the user, but due to the provision of a very long seal line for the at least one closing valve, it results in effective cleaning of the filter.

Preferably, the at least one filter can be acted on by means of the at least one closing valve while maintaining a negative pressure in the mouth region of a suction hose opening into the suction inlet with external air. If the at least one closing valve is opened, the pressure on the side of the filter facing away from the dirt collecting container abruptly increases and is then reduced again. The sudden increase in pressure causes an effective cleaning of the filter, but since it is degraded by the at least one suction turbine immediately again, it does not lead to a complete interruption of the negative pressure in the mouth region of the opening into the suction inlet suction hose. Rather, a quasi-continuous suction operation can be maintained.

It can be provided, for example, that when connecting a 2.5 m long suction hose with an inner diameter of 35 mm during the application of the at least one filter with external air of the negative pressure in Suction hose at a distance of 3 cm from the suction inlet at best drops for 150 ms below 40% of the value formed with closed closing valves. A standard hose having an inner diameter of 35 mm and a length of 2.5 m is usually connected to the vacuum cleaning device according to the invention. During the suction operation, a negative pressure forms in the suction hose and in the dirt collecting container, the negative pressure in the suction hose at a distance of 3 cm from the suction inlet, for example, about 50 mbar, if no tool is connected to the free end of the suction hose, the free end of the suction hose so it is open. If the at least one closing valve for filter cleaning is opened for a short time, then the negative pressure at the designated point briefly drops to a value of less than 20 mbar, but at the latest after 150 ms the negative pressure again exceeds the value of 20 mbar and then approaches again the original value of 50 mbar. For the user, therefore, there is no noticeable interruption of the suction operation. It may be provided, for example, that the negative pressure at the designated point for less than 100 ms, in particular for about 50 to about 80 ms drops below a value of 40% of the forming at closed closing valves value.

The following description of a preferred embodiment of the invention serves in conjunction with the drawings for further explanation. Show it:

FIG. 1 shows a schematic sectional view of a vacuum cleaner according to the invention; FIG. 2 shows an enlarged sectional view of the vacuum cleaning device from FIG. 1 in the region of a closing valve;

Figure 3: a fragmentary plan view of a valve holder of the closing valve;

Figure 4 is a sectional view taken along line 4-4 in Figure 3;

FIG. 5 is a sectional view of a valve body of the closing valve;

Figure 6: a perspective view of the valve body of Figure 5 and

FIG. 7 shows the course of the negative pressure forming in the mouth region of a suction hose connected to the vacuum cleaner when the closing valve is actuated.

In the drawing, a vacuum cleaning device in the form of a vacuum cleaner 10 is shown schematically with a lower part, which forms a dirt collecting container 12, on which an upper part 14 is placed, which receives a suction unit 16. The dirt collecting container 12 has a volume of up to 80 l, preferably a volume of about 30 l to about 80 l. It comprises a suction inlet 18, to which a suction hose 20 can be connected, at its free end, that in the drawing to achieve a better overview is not shown, a suction nozzle can be connected. Alternatively it can be provided that the suction hose 20 is connected to a machining tool, such as a drilling unit or a milling unit, so that during operation of the machining tool accumulating dust can be sucked.

The upper part 14 forms a suction outlet 22 for the dirt collecting container 12, wherein at the suction outlet 22, a pleated filter 24 is held, to which a suction line in the form of a suction channel 26 connects, via which the pleated filter 24 is in flow connection with the suction unit 16. About the suction channel 26 and the pleated filter 24, the dirt collector 12 can be acted upon by the suction unit 16 with negative pressure, so that a symbolized in Figure 1 by the arrows 28 Saugströmung forms, under the effect of dirt in the dirt collector 12 can be sucked. By means of the fold filter 24, the dirt particles from the suction flow 28 can be deposited.

Above the pleated filter 24, a closing valve 30 is arranged in the upper part 14, which is shown enlarged in Figure 2. It comprises a stationary in the upper part 14 arranged valve holder 32 which forms a valve seat and cooperates with a valve body in the form of a valve plate 34. The valve disk 34 is acted upon by a closing spring 36 with a non-linear characteristic in the direction of the valve holder 32 with a closing force. The closing spring 36 is clamped between a plate-like, in the upper part 14 arranged filter holder 38 and the valve plate 34.

As is clear in particular from FIGS. 3 and 4, the valve holder 32 has two annular passages 40, 42 arranged concentrically to one another, which are sealed in the closed position of the closing valve 30 by the valve disk 34. The passage openings 40 and 42 are formed in a retaining plate 44 of the valve holder 23, wherein the retaining plate 44 is divided by the through holes 40 and 42 in an outer ring 45 and an inner ring 46 concentrically surrounding a cylindrical center portion 47 and by means of the outside of the central portion 47 in the radial direction protruding retaining ribs 49 are fixed to the middle part 47.

The central part 47 comprises a hollow cylindrical shell 51, which is covered on the upper side by an end wall 52 and receives an electro-magnet 54. This is surrounded by an annular space 55 within the middle part 47 and is connected via a connection cable, not shown in the drawing, to a control unit of the vacuum cleaner 10, likewise not shown in the drawing, in electrical connection.

The valve disk 34 has an annular passage opening 57, which is penetrated by a plurality of radially aligned support ribs 58, which connect an outer annular region 60 of the valve disk 34 with a circular central region 61 of the valve disk 34. From the central region 61 is in the direction of the central portion 47 of the valve holder 32 from a guide sleeve 63 from above, which dips into the annular space 55 of the valve holder 32 and an iron plate 64 receives, which is glued into the guide sleeve 63.

The valve disk 34 carries on its valve holder 32 facing upper side an inner sealing ring 66, a middle sealing ring 67 and an outer sealing ring 68, which are concentrically aligned with each other and each form a sealing lip. The inner sealing ring 66 extends along an inner edge 70 of the passage opening 57, the middle sealing ring 67 extends along an outer edge of the passage opening 57 and the outer sealing ring 68 extends along the outer periphery 72 of the valve disk 34th

In the closed position of the valve disk 34, the inner sealing ring 66 sealingly engages the outer edge 74 of the passage opening 40 of the valve holder 32, and the middle sealing ring 67 and the outer sealing ring 68 lie sealingly against an inner edge 75 and an outer edge 76 of the passage opening 42nd at. The sealing rings 66, 67 and 68 thus define annular sealing lines which delimit a surface acted upon by the pressure difference forming at the closing valve 30. The inner sealing ring 66 in this case limits a first, circular partial surface having a radius R1, and the sealing rings 67 and 68 delimit a second, annular partial surface with an inner radius R2 and an outer radius R3. Overall, therefore, the closing valve 30 has a defined by the sealing rings 66, 67 and 68 sealing line, the length of which results from the sum of the length of the sealing rings 66, 67 and 68. The sealing line thus formed delimits a surface which is acted upon by the pressure difference forming at the closing valve 30 and which results from the sum of the explained first and second partial surfaces. The square of the total length of the sealing line is considerably larger than 25 times the area bounded by the sealing line. Compared with a circular area whose circumference corresponds to the total length of the sealing line, the area actually bounded by the sealing line is significantly smaller than 50% of the circular area. This has the consequence that when opening the closing valve 30, an intense foreign air flow can form through which drops abruptly in the region between the pleated filter 24 and the closing valve 30, the negative pressure, so that the pleated filter 24 is acted upon by a pressure surge and briefly against the Suction flow 28, ie in the counterflow direction, is flowed through by external air, the can flow into the upper part 14 via a lateral opening 78. The external air flow is illustrated in FIG. 2 by the arrows 80.

If the closing valve 30 assumes its closed position, a negative pressure is formed in the dirt collecting container 12 and in the suction channel 26. If a suction hose with a length of 2.5 m is connected to the suction inlet 18, which has an inner diameter of 35 mm, then the negative pressure in the mouth region of the suction hose, namely at a distance of 3 cm from the suction inlet 18, is approximately 50 mbar, provided At the free end of the suction hose no tool and no suction nozzle is connected. FIG. 7 shows the course of corresponding pressure measurements. If the current supply of the electro-adhesive magnet 54 is interrupted to actuate the closing valve 30, the magnetic force with which the iron plate 64 is held on the electro-adhesive magnet abruptly ceases. This has the consequence that the valve disc 34 lifts against the closing force of the closing spring 36 of the valve holder 32 under the action of the pressure prevailing on the closing valve 30. The closing spring 36 absorbs the energy of the valve disk 34, brakes it and then accelerates it back again, so that within a short time it again assumes its closed position and again closes the through openings 40 and 42 of the valve holder 32. During the movement of the valve disk 34, the external air flow 80 is formed, so that external air flows in the counterflow direction through the pleated filter 24 into the dirt collecting 12 and drops in the mouth region of the suction hose 20, the negative pressure within about 40 to about 60 ms. Since then, however, the valve disk 34 has again taken its closed position and the inflowing external air is sucked by the suction unit 16, the negative pressure then increases again to take practically its original value of about 50 mbar after about 200 ms. Values below 40% of the value formed when the closing valve 30 is closed, that is to say values of less than 20 mbar, the negative pressure in the mouth region of the suction hose 20 only lasts for a period of approximately 60 ms. This has the consequence that a quasi-continuous suction operation is maintained for the user and yet a reliable filter cleaning is ensured. The closing valve in this case has a compact design with a low design and can be produced inexpensively.

Claims

PATENT CLAIMS

A vacuum cleaning device having a dirt collecting container which has a suction inlet and is in flow connection via at least one filter and at least one suction line with at least one suction unit, and with at least one outside air inlet which opens into the suction line downstream of the at least one filter and which uses at least one closing valve can be closed, wherein the at least one closing valve comprises a movable valve body which rests in a closed position to form at least one valve seat forming one or more sealing lines, wherein the at least one sealing line defines a surface which is acted upon in the closed position of the closing valve with a differential pressure , characterized in that the square of the total length of all the sealing lines is at least 25 times the total size of all of the sealing lines bounded, acted upon by differential pressure surfaces.

2. Saugreinigungsgerät according to claim 1, characterized in that the square of the total length of all sealing lines is at least 50 times the total size of all bounded by the sealing lines surfaces.

3. Saugreinigungsgerät according to claim 1 or 2, characterized in that the at least one closing valve (30) has a plurality of sealing lines in the form of closed sealing sections (66, 67, 68).

4. Saugreinigungsgerät according to claim 3, characterized in that the sealing sections form nested sealing rings (66, 67, 68).

5. Saugreinigungsgerät according to claim 4, characterized in that the sealing rings (66, 67, 68) are arranged concentrically with each other.

6. Saugreinigungsgerät according to claim 3, 4 or 5, characterized in that the sealing rings (66, 67, 68) are designed round.

7. Saugreinigungsgerät according to any one of claims 3 to 6, characterized in that the sealing sections (66, 67, 68) are arranged in a common plane.

8. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the valve body has a valve plate (34), with the interposition of at least one sealing line defining a sealing element (66, 67, 68) to the at least one valve seat (32) is tightly applied ,

9. Saugreinigungsgerät according to claim 8, characterized in that the valve disc (34) has at least one passage opening (57) which is limited in the closed position of the valve disc (34) by at least one sealing element (66, 67).

10. Saugreinigungsgerät according to claim 8 or 9, characterized in that the at least one valve seat (32) has a plurality of through openings (40, 42) which in the closed position of the valve disc (34) each of at least one sealing element (66, 67, 68) are limited.

11. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the valve body (34) is held displaceably in a guide (55).

12. Saugreinigungsgerät according to claim 11, characterized in that the guide (55) is designed cylindrical.

13. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the at least one closing valve has a guide sleeve (63) which dips into a guide receptacle (55).

14. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the valve body (34) by a spring (36) is acted upon by a closing force.

15. Saugreinigungsgerät according to claim 14, characterized in that the spring (36) has a non-linear characteristic.

16. Vacuum cleaning device according to one of the preceding claims, characterized in that the valve body (34) by a magnet holder (54) is held in the closed position.

17. Saugreinigungsgerät according to claim 16, characterized in that the magnetic holder comprises an electromagnet (54).

18. Vacuum cleaning device according to claim 17, characterized in that the electromagnet is configured as an electro-adhesive magnet (54).

19. Vacuum cleaning device according to one of the preceding claims, characterized in that the at least one closing valve (30) is electronically actuated.

20. Saugreinigungsgerät according to claim 19, characterized in that the at least one closing valve (30) is actuated at different time intervals.

21. Vacuum cleaning device according to one of the preceding claims, characterized in that the at least one filter is designed as a pleated filter (24).

22. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the Saugreinigungsgerät (10) has a single filter (24).

23. Saugreinigungsgerät according to claim 22, characterized in that the filter (24) can be acted upon by opening the closing valve (30) over its entire surface with external air.

24. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the valve body (34), starting from its closed position over its open position is continuously movable back into its closed position.

25. Saugreinigungsgerät according to any one of the preceding claims, characterized in that the at least one filter (24) by means of the at least one closing valve (30) can be acted upon for less than 200 ms with external air.

26. Vacuum cleaning device according to one of the preceding claims, characterized in that the at least one filter (24) by means of the at least one closing valve (30) while maintaining a negative pressure in the mouth region of the suction inlet (18) opening suction hose (20) can be acted upon with external air ,

27. Saugreinigungsgerät according to claim 26, characterized in that when connecting a 2.5 m long suction hose with an inner diameter of 35 mm during the application of the at least one filter (24) with external air of the negative pressure in the suction hose at a distance of 3 cm from the suction inlet (18) at most for 150 ms below 40% of the value formed with closed closing valves falls.