DE10101219C9 - A vacuum cleaner - Google Patents

Abstract

Vacuum cleaner with a filter (2) divided into at least two filter parts (3, 4), which is arranged on / in a dirty vacuum container (1) and which filter parts (3; 4) can be acted upon individually with an air flow of a blower (21), and with two valves for separate control of the cleaning of the filter parts (3, 4) of the filter (2), characterized in that in normal operation, the at least two filter parts (3, 4) are penetrated by the dirt-laden air flow radially from outside to inside, and that each of the at least two filter parts (3, 4) is associated with a three-way valve, which switch abruptly in the cleaning position; so that in the respective filter part (3 or 4) of the air flow is reversed and the air flow now as impulsive cleaning air flow from the fan (21) from radially inside to radially outside cleans the radially outer dirt particles, while / the other / n filter part / e (4 or 3) remains in function because the three-way valve arranged there remains in its operating position.

Description

• Auf die Berufung der Beklagten wird das Urteil des 3. Senats (Nichtigkeitssenats) des Bundespatentgerichts vom 16. September 2014 abgeändert und wie folgt neu gefasst:
  • Das deutsche Patent 101 01 219 wird dadurch teilweise für nichtig erklärt, dass in Patentanspruch 1 das Wort „nun“ durch die Wendung „der Luftstrom nun als stoßartiger Reinigungsluftstrom von dem Gebläse (21)“ ersetzt wird und dass sich die Patentansprüche 2, 9, 10 und 11 auf die so geänderte Fassung rückbeziehen.

The X. Civil Senate of the Federal Court of Justice has recognized the hearing on 21 February 2017 as:

• On appeal of the defendant, the judgment of the 3rd Senate (Nullity Senate) of the Federal Patent Court of 16 September 2014 is amended and reworded as follows:
  • The German Patent 101 01 219 is partially annulled by the fact that in claim 1, the word "now" by the phrase "the air flow is now replaced as a jerky cleaning air flow from the blower (21)" and that the claims 2, 9, 10 and 11 to the so reverse the amended version.

The invention relates to a vacuum cleaner with a filter divided into at least two filter parts according to the preamble of claim 1.

It is known to equip the vacuum cleaner with a split ring filter, wherein during the cleaning either only one filter half or the other filter half is cleaned.

State of the art

In the DE 41 38 223 C1 is a valve spool available, which optionally closes one or the other opening of a respective filter. So it's not a split ring filter but two separate filters, one always working while the other is being cleaned. This is controlled by the position of the closing flap, which optionally closes or opens one or the other filter.

Disadvantage of this arrangement, however, is that no impulsive Abreinigungsimpuls arises, whereby the Abreinigungswirkung is relatively poor.

The DE 3709671 A1 discloses a particulate filter, in particular for filtering diesel exhaust gases, for which a filter housing with filter bodies is proposed, in which the gas to be purified from the outside inward through the Filterköfper is flowable, while the filter cartridges are acted upon from the inside to the outside with compressed air. Without temperature increase, this system can be used during engine operation, a filter regeneration take place by the compressed air, the particles are blown off the loaded filter body and transported in a collection container.

The DE 43 06 284 A1 discloses a method for the separation of solid combustion residues from exhaust gases of internal combustion engines, in particular diesel engines proposed. The exhaust gases are passed through a moving filter in which the solid combustion residues (soot particles) are largely retained for a short time. Subsequently, the residues are sucked out with the fresh air sucked in and the additionally supplied compressed air from the filter again and returned together with the fresh air into the combustion chamber of the engine for afterburning. Among other things, the device for carrying out this method consists of a rotatable filter with a ring-cylindrical cross-section within a cylindrical housing, to the front side with a radial distance from each other, the exhaust and the air intake are connected, the exhaust pipe to a first and the suction to a second Interior of the housing is connected, which is sealed from the first interior. At the acted upon by the intake pipe with fresh air second internal space, the compressed air source for blowing the solid combustion residues from the filter is connected, which have previously come through the exhaust pipe in the filter to the filing, as this was in the first interior.

task

The invention is therefore based on the object, starting from a vacuum cleaner with filter cleaning of the type mentioned, to make the cleaning of the filter so that a much more effective cleaning is given. In particular, an impulsive cleaning of the filter should take place.

To achieve the object, the invention is characterized by the features of claim 1.

Distributive embodiments are described in the subclaims.

Background of the invention is that a filter, in particular a circumferential ring filter, is subdivided by at least two filter halves by a bottom-fitting filter bottom, that in normal operation (dirt suction operation) both filter halves are penetrated by the dirt-laden air flow radially from outside to inside, that further each filter half a three-way valve is associated, which switch abruptly in the cleaning position, so that in the respective filter half of the air flow is reversed and now cleans the radially outer dirt particles from radially inside to radially outside, while the other half filter still in function remains because the arranged there three-way valve remains in its operating position.

In a preferred embodiment of the present invention, each one Filter half associated three-way valve designed as a solenoid valve, which has two valve plates, which are controlled in the manner of a sequence control with the associated valve rod.

Sequential control means that initially the first valve disc abruptly closes the suction chamber, while the exhaust chamber remains closed and that upon further movement of the valve stem only after the first valve disc, which continues to close the suction chamber, the second valve disc, which is associated with the exhaust chamber, opens and the overpressure generated by the blower now passes through the exhaust chamber via the now open valve in the filter chamber radially inwardly from the filter to be cleaned, jerky this filter flows in the radial direction from the inside out and thereby cleans the filter.

So it is suddenly abruptly adhering to the outside of the first filter half dirt particles, and after but in the vacuum cleaner tank as before and constantly a negative pressure, these blasted dirt particles fall into the dirt container, while still the second filter half remains in operation and maintains its cleaning action for the dirt sucker stream.

The background of the invention is therefore that on the one hand a jerky cleaning air flow is introduced from the blower in the first filter half, but at the same time during the cleaning process always the second filter half remains in operation. So it does not come to an interruption of Schmutzsaugerbetriebes and this Abreinigungszyklus takes place unnoticed for the user.

The cleaning can be carried out under pressure or time controlled.

A vacuum-controlled cleaning could take place in such a way that in each case a pressure sensor is present in a filter chamber, which compares the pressure prevailing there with the pressure in the dirt suction tank - which assumes that there is another pressure sensor -, and at too high differential pressure, the cleaning each a filter half introduced.

In another embodiment, it may also be provided that the cleaning takes place only time-controlled, d. H. For example, after a Abreinigungsleistung of one to ten minutes of the corresponding - unnoticed by the user - Abreinigungszyklus one filter half expires.

It is important that the three-way valve described here is formed in a preferred embodiment as a sequential control valve, d. h., There are two mutually time-delayed closing valve plates or flaps available, which accomplish the corresponding time-delayed closing and opening movement of the suction chamber in comparison to the exhaust chamber.

Instead of a sequence-controlled, formed with valve plates, solenoid valve other valve arrangements can of course be used, which also accomplish the time-delayed opening of a chamber with the time-delayed closing of the other chamber. In particular, flap valves can be used, rotary valves, control rollers and the like three-way valve arrangements more.

Likewise, instead of an electromagnet that drives the corresponding valve tappet, other types of drives can be used, such. B. vacuum actuators, electric motors with a corresponding spindle drive or spring store, the sudden switch from one state to another, so as to accomplish a lifting and lowering of the valve plunger driven thereby.

In the following the invention will be explained in more detail with reference to drawings, which represent only one embodiment. Here, the features and advantages of the invention will become apparent from the drawings and their description.

list of figures

• 1: schematisiert den oberen Teil eines Schmutzsaugers mit Anordnung der Steuerung für die Filterabreinigung in Betriebsstellung der Filter;
• 2: die gleiche Darstellung wie in 1 mit dem linken Filter in Abreinigungsstellung.

Show it:

• 1 : schematizes the upper part of a vacuum cleaner with arrangement of the filter cleaning control in the operating position of the filter;
• 2 : the same representation as in 1 with the left filter in cleaning position.

According to the 1 and 2 is on a vacuum cleaner tank 1 a control housing 8th placed, which radially outwardly a circumferential ring filter 2 carries, which in two filter halves 3 . 4 is divided.

The subdivision takes place here by a, sealing on the respective circumferential bottom of the filter 2 attached, filter bottom 5 which is completely closed and which has a divider in its center region 7 forms, sealingly to the ground 35 of the control housing 8th invests.

Through the formation of a divider 7 are here in the space between the ground 35 and the filter bottom 5 two filter chambers 9 10, which are separated from one another by ventilation technology.

The filter chamber 9 Here, the filter half 3 is assigned, while the filter chamber 10 the filter half 4 assigned.

The dirt laden, from the vacuum cleaner tank in the direction of arrows 11 against the filter 2 flowing air is therefore on the outside of the filter 2 cleaned accordingly, flows through each in the direction of arrows 12 the filter and simultaneously enters inlets 14 . 15 on the steering box 8th one.

In the drawn position of the given three-way valve, the air flows on the simultaneously open valve seats 18 . 19 , via a respective intermediate chamber 16 . 17 in the common suction chamber 13 where they have a central inlet 20 into the fan 21 enters and from there via the exhaust air chambers 24 . 25 gets into the open air.

It is important that in the operating position the exhaust air chambers 24 . 25 through the upper valve disc 30 , 30a of the three-way valves are closed while at the same time the suction chamber 13 through the opened valve plates 31 , 31a is open.

In this operating position, therefore, the air flows through both filter halves 3 . 4 simultaneously. This is a significant advantage over the prior art, because in the prior art always only one filter half 3,4 of a split filter 2 was flowed through, but not the filter 2 altogether simultaneously.

The filter bottom 5 Incidentally, lies on a circumferential seal 6 at the bottom side of the circulating filter 2 at.

In the illustrated operating position is in each case the three-way valve of the right and left representation in 1 from a lifting magnet 26 , 27, each one a valve rod 28 . 29 in the stroke direction drives.

In the illustrated position so closes the upper valve plate 30 , 30a, the exhaust chamber 24,25 during the lower valve disc 31 , 31a is open and thus on the intermediate chambers 16 . 17 in the suction chamber 13 empties.

Important here is that the valve disk 30 , 30a are arranged freely displaceable on the respective valve rod 28, 29 and here only a shift limit by at a distance 36 on the valve stem 28 . 29 mounted driver disks 32, 32a exists.

Furthermore, on each valve stem 28 . 29 at a distance 37 firmly with the respective valve rod a stop washer 34 34a, which connects from the top to the lower valve plate 31 , 31a applies and the valve plate 31 , 31a in this case spring loaded by a spring 33 , 33a is held against the stopper plate 34, 34a.

The feather 33 , 33a relies on a lower stop disc 38 starting with the end of each valve rod 28 . 29 connected is.

In the cleaning position now the magnet 27 operates and raises the valve stem 29 on, so that initially the valve disc 31 a, the valve seat 19 closes, but at the same time the drive plate 32a has not raised the valve plate 30a.

In this position, therefore, the valve disc 30a closes the exhaust chamber 25 , while at the same time but also the suction chamber 13 is closed by the valve plate 31a.

In this case, both valve disks 30a, 31a are in their closed position, and in the exhaust air chamber 25 creates a relatively high pressure, because the turbine in the direction of arrow 12 'the exhaust air flow in the exhaust chamber 25 blows.

With further raising of the valve tappet in the direction of the arrow 39 it comes to the state 2 , So, wherein the valve plate 31a remains in its closed position, but now the drive plate 32a entrains the upper valve plate 30a and moves into the open position, so now that of the turbine 21 produced exhaust air in the direction of arrow 12 'through the now open exhaust chamber 25 down into the intermediate chamber 17 penetrates and from there over the inlet 15 abruptly into the filter chamber 10 passes, causing the filter half 4 now suddenly cleaned up.

This is a great advantage over the prior art, because here is actually a sudden pressure flow to the filter half 4 generates, so that the Abreinigungsluft in the direction of arrow 12 ', the filter half 4 flows through from radially inside to outside and the dirt particles in the direction of arrow 11 'to the bottom of the Schmutzsaugerbehälters 1 fall.

It is important that the right filter half 3 remains in its operating position, ie, its three-way valve remains in the functional position, as in 1 , and it becomes the full vacuum cleaner operation with the filter half 3 maintained.

After cleaning the filter half 4 short and abrupt takes place in the range of milliseconds to tenths of a second, this abrupt cleaning is not noticed by the user and the cleaning performance of the vacuum cleaner as a whole is not affected.

So it is important that the choice of the distances 36 and 37 are made so that it is always ensured that when lifting the respective valve stem 28 respectively. 29 in the direction of the arrow 39 is always ensured that initially with the lower valve plate 31 and 31 a first, the suction air chamber 13 is closed, but then during an intermediate position but also the exhaust chamber 24 respectively. 25 remains closed, because the respective valve disk 30 or 30a, due to the overpressure in the exhaust chamber 24 respectively. 25 in its closed position on the valve seat of the exhaust chamber 24 respectively. 25 is held.

Only with further movement of the respective valve rod 28 respectively. 29 in the direction of the arrow 39 then take the drive plate 32 or 32a the upper valve plate 30 or 30a in its open position with, which now abruptly the exhaust chamber 24 or 25 is opened and the suction chamber 13 but always remains closed.

As a result, then suddenly in the exhaust chamber 24 respectively. 25 accumulating overpressure via the now open down exhaust air chamber into the respective filter chamber 9 respectively. 10 initiated and abruptly cleans the filter located there 3 or 4 from.

LIST OF REFERENCE NUMBERS

1

A vacuum cleaner container

2

filter

3

filter half

4

filter half

5

filter bottom

6

poetry

7

divider

8th

control housing

9

filter chamber

10

filter chamber

11

arrow

12

arrow

13

suction chamber

14

Inlet

15

Inlet

16

intermediate chamber

17

intermediate chamber

18

valve seat

19

valve seat

20

inlet port

21

fan

22

outlet

23

outlet

24

exhaust chamber

25

exhaust chamber

26

solenoid

27

solenoid

28

valve rod

29

valve rod

30

Valve disc 30a

31

Valve disc 31a

32

Driving disk 32a

33

feather

34

stop disc

35

ground

36

distance

37

distance

38

tee disc

39

arrow

Claims (11)

Vacuum cleaner with a filter (2) divided into at least two filter parts (3, 4), which is arranged on / in a dirty vacuum container (1) and which filter parts (3; 4) can be acted upon individually with an air flow of a blower (21), and with two valves for separate control of the cleaning of the filter parts (3, 4) of the filter (2), characterized in that in normal operation, the at least two filter parts (3, 4) are penetrated by the dirt-laden air flow radially from outside to inside, and that each of the at least two filter parts (3, 4) is associated with a three-way valve, which switch abruptly in the cleaning position; so that in the respective filter part (3 or 4) of the air flow is reversed and the air flow now as impulsive cleaning air flow from the fan (21) from radially inside to radially outside cleans the radially outer dirt particles, while / the other / n filter part / e (4 or 3) remains in function because the three-way valve arranged there remains in its operating position. Vacuum cleaner after Claim 1 , characterized in that the three-way valves are designed as solenoid valves. Vacuum cleaner after Claim 2 , characterized in that the three-way valves each have two valve plates (30, 31, 30a, 31a) each having a valve rod (28, 29). Vacuum cleaner after Claim 3 characterized in that the valve discs (30, 31; 30a, 31a) are controlled in a sequential control manner. Vacuum cleaner after Claim 4 , characterized in that first of all the first valve disk (31, 31a) abruptly closes a suction chamber (13), while an exhaust air chamber (24, 25) still remains closed and that upon further movement of the valve rod (28; the first valve disk (31; 31a), the second valve disk (30; 30a) associated with the exhaust air chamber (24; 25), and the overpressure generated by the fan (21) now open radially inwardly via the exhaust air chamber (24; via the now open valve into the filter chamber (9; 10) of the filter half to be cleaned passes, jerky this filter flows in the radial direction from the inside to the outside and thereby cleans the filter. Vacuum cleaner according to one of the Claims 4 or 5 , characterized in that the control of the valves is performed under pressure or controlled timing. Vacuum cleaner after Claim 6 , characterized in that in each case in a filter chamber (3, 4) and in the vacuum cleaner tank (1) even a pressure sensor is present, which measures the prevailing pressure at a corresponding excess of the differential pressure between the pressure of the filter chamber (3, 4) and the pressure the dirt suction tank then the cleaning of the respective filter half (3, 4) is initiated by actuation of the respective valve. Vacuum cleaner after Claim 1 , characterized in that the three-way valves are designed as electrically operated control rollers. Vacuum cleaner after Claim 1 , characterized in that the three-way valves are designed as electric motors with spindle drive. Vacuum cleaner after Claim 1 , characterized in that the three-way valves are designed as a gas pressure accumulator. Vacuum cleaner after Claim 1 , characterized in that the three-way valves are designed as a spring accumulator.

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