DE9303083U1 - Vacuum cleaners, especially cyclone vacuum cleaners with filters - Google Patents

Description

KÖHLER SCHMID + PARTNER

PATENT ATTORNEYS

KÖHLER SCHMID + P. RUPPMANNSTR. 27 D-7000 STUTTGART 80

19 996 S/bi

E lectrostar Schöttle GmbH & Co.

7313 Reichenbach / Fi Is Stuttgarter Straße 36

Vacuum cleaners, especially cyclone vacuum cleaners with filters

It is already known to use pre-separators in vacuum cleaners in which the coarse dust is separated. The pre-separator is usually located in a separate housing, which is connected to the actual vacuum cleaner housing by a hose. Due to the need to use two housings, such vacuum cleaners are relatively complex to manufacture, take up a lot of space and are also relatively inefficient. The object of the invention presented above is to create a pre-separator in a vacuum cleaner, in particular a cyclone vacuum cleaner, with a filter, which has the same spatial dimensions as a conventional vacuum cleaner, is easy to manufacture and has a possible

has the highest possible efficiency.

This is achieved according to the invention by arranging a filter chamber which encloses the filter like a pot and has only one or more recesses for the suction air to pass through. The filter chamber according to the invention is located in the vacuum cleaner housing itself, so that no additional housing is required and the external dimensions are not increased as a result. Since no additional hose connections are required, the efficiency is also increased. However, there are also other significant advantages. The filter chamber protects the actual filter against damage, both when vacuuming and when emptying the container. The coarse suction material is separated from the suction flow on the outer circumference of the filter chamber, so that only fine dust can reach the filter. This also increases the service life of the filter.

While in the versions without a filter chamber the dust housing can only be filled to the extent that there is still a certain distance to the filter base in order not to clog the filter and also to enable it to be shaken, the dust chamber can now be used for the coarse suction material up to the height of the recesses in the filter chamber, as the filter chamber separates the actual filter from the coarse dust chamber. As a result, the filter cannot become clogged and, despite the high level of suction material in the container, the shaking effect is not hindered. There are particular advantages when wet vacuuming, both from

Water as well as oil or oil-contaminated substances, because these settle in front of the filter chamber, so that the filter itself does not come into contact with them and therefore remains dry.

Another significant advantage of the filter chamber is that it can also be retrofitted to existing vacuum cleaners by simply placing the filter chamber over the existing filter and then connecting it to the suction head or the housing in some way.

In order not to reduce the efficiency of the vacuum cleaner according to the invention unnecessarily, the total cross-section of the recesses is equal to or larger than the cross-section of the inlet opening or a suction hose of the vacuum cleaner. In order to achieve the highest possible suction level for the coarse suction material, the recesses are expediently arranged at the end of the filter chamber opposite the chamber floor. In order to achieve an even better separation of the coarse suction material, chicanes are provided on the recesses to divert the suction air. This first calms the air flow and then accelerates it so that heavier parts fall off safely. The recesses are preferably designed as longitudinal slots in the casing of the filter chamber, whereby the longitudinal slots can also be formed by spiral-shaped tongues cut out of the casing.

The filter is not only inside the vacuum cleaner housing by

the filter chamber is particularly protected, but also when removing the suction head together with the filter chamber, especially if the base of the latter is designed as a base. This also increases the service life of the filter. The filter chamber also protects against the possibility of contact with a contaminated filter. This is particularly important when disposing of quantities of dust that are hazardous to health. The base of the filter chamber is conveniently attached to it in a detachable manner, so that the filter chamber can be emptied of fine dust by simply opening the base. In order to ensure that no coarse suction material reaches the filter through the recesses, the filter chamber has a deflector collar at least on the recesses.

A detachable connection between the filter chamber and the suction head is particularly useful, so that the actual filter can be easily replaced after removing the filter chamber. Another option for attaching the filter chamber is to place it on the edge of the vacuum cleaner housing, whereby the filter chamber can then be clamped between the housing and the suction head.

The drawing shows embodiments of the invention. They show:

Figure 1 shows a longitudinal section through a cyclone vacuum cleaner Figure 2 shows section II-II according to Figure 1

-S-

Figure 3 is a representation according to Figure 2 of another embodiment.

The cyclone vacuum cleaner shown in Figure 1 has a suction head 2 that is detachably mounted on a housing 1. A filter 3 is arranged on the suction head 2 and projects into the housing 1. The filter 3 is surrounded by a pot-shaped filter chamber 4, which has a recess 7 for the passage of the suction air 10 at the end 6 opposite the chamber base 5. Below the recess 7 there is also a deflection collar 8, which runs from the ends of the recess 7 almost to the upper end 6 of the filter chamber 4.

The suction air 10 entering at the air inlet opening 9 flows around the filter chamber 4, whereby the coarse dust settles and fills the space 11 for coarse suction material formed on the one hand by the housing 1 and on the other hand by the filter chamber 4. In addition, the deflection collar 8 also prevents coarse suction material from passing into the fine dust space located between the base 5 of the filter chamber 4 and the lower surface 12 of the filter 31. In order to keep the pressure losses as low as possible, the cross-section of the recess 7 is kept as large as that of the air inlet opening 9.

While in Figure 2 the suction air 10 enters radially, in the embodiment according to Figure 3 the air enters tangentially. The recess for the entry of the suction air 10 is divided into several recesses 14, whereby the recesses are formed by

— fc —

The casing of the filter chamber 4 is formed by curved tongues 15. This in turn results in a deflection of the suction air 9, which further improves the falling off of coarse suction material.

Claims (11)

-J- 19 996 S/bi claims 1. Vacuum cleaner, in particular cyclone vacuum cleaner with filter, characterized by a filter chamber (4) which encloses the filter (3) in a pot-like manner and has one or more recesses (7, 14) for the passage of the suction air (10). 2. Vacuum cleaner according to claim 1, characterized in that the total cross section of the recesses (7, 14) is equal to or larger than the cross section of the inlet opening (9) or of a suction hose of the vacuum cleaner. 3. Vacuum cleaner according to one or both of the preceding claims, characterized in that the recesses (7, 14) are provided approximately at the end of the filter chamber (4) opposite the chamber floor (5). 4. Vacuum cleaner according to one or more of the preceding claims 1 to 4, characterized in that baffles for diverting the suction air (10) are provided on the recesses (7, 14). are. 5. Vacuum cleaner according to one or more of the preceding claims, characterized in that the recesses (7, 14) are designed as longitudinal slots in the casing of the filter chamber. 6. Vacuum cleaner according to claim 5, characterized in that the longitudinal slots are formed by spirally bent tongues (15) cut out of the filter chamber. 7. Vacuum cleaner according to one or more of the preceding claims, characterized in that the bottom (5) of the Filter chamber (4) is designed as a base. 8. Vacuum cleaner according to one or more of the preceding claims, characterized in that the bottom (5) of the filter chamber (4) is detachably arranged on the latter. 9. Vacuum cleaner according to one or more of the preceding claims, characterized in that the filter chamber has a deflection collar at least at the recesses . 10. Vacuum cleaner with suction head removable from the housing with filter according to one or more of the preceding claims, characterized in that the filter chamber (4) is detachably connected to the suction head. 11. Vacuum cleaner with suction head with filter that can be removed from the housing, according to one or more of the preceding claims 1 to 9, characterized in that the filter chamber (4) can be supported on the edge of the vacuum cleaner housing (1) and can be clamped between the housing (1) and suction head (2).