DEVICE FOR REMOVING FOREIGN SUBSTANCES FROM A LIQUID

Description

[0001] The invention relates to a device for removing foreign substances from a liquid by means of at least one filter, wherein the liquid with the foreign substances is fed from a bath to the filter by means of a rotor via an inlet in a housing. State of the art

[0002] There are a variety of liquids that need to be cleaned, both in the home and in industry. These include, for example, coolant or lubricant baths in machine tools or cooking oils, for example, from deep fryers. These are just a few examples, but the invention is intended to apply to all possible liquids that require cleaning.

[0003] Typically, the liquid is periodically removed from a storage tank and fed into a device for cleaning the liquid. From there, the liquid is then returned to the storage tank. Often, only the surface of the liquid is vacuumed to remove the lighter, floating particles. The heavier contaminant particles are then periodically removed to the bottom after they have settled.

[0004] The predecessor of the present invention is EP 1 326 692 B1, in which the rotor is equipped with vanes for sucking the liquid through recesses in the rotor disk and forcing the liquid further into the shaft. A pre-chamber is to be formed in the filter housing between the shaft and the filter, and this filter housing is to be removably connected to the immersion housing.

[0005] In practice, this device has proven to be extremely effective. Task

[0006] The object of the present invention is to further improve the above-mentioned device and to increase its efficiency. Solution to the task

[0007] To achieve the object, the inlet extends vertically in a columnar manner inside the housing over at least a large part of a rear wall of the housing opposite the filter and has outlets on the front side, and a chamber for returning the liquid to the bath is provided on at least one side wall of the housing, which chamber is covered by an internal filter towards the interior of the housing.

[0008] This means that the entire cleaning unit now consists of just one housing with the corresponding filter inserts. This allows the entire unit to be kept significantly more compact.

[0009] Another key advantage is that the inlet for the liquid to be cleaned is positioned as far away as possible from the microfilter, allowing the liquid to be distributed throughout the entire housing. This improvement also allows the cleaned liquid to enter the cleaning unit not only on one side, namely the front opposite the inlet, but also from the sides in the side walls. The liquid is forced into the column-like inlet by the rotor and leaves this column-like inlet through front outlets or side openings below the ceiling or, if applicable, a false ceiling of the housing. This results in a significantly improved vertical distribution of the liquid within the housing.

[0010] Preferably, however, the liquid should also be cleaned at other locations on the housing, particularly on the side walls. For this purpose, according to the invention, chambers are formed on the side walls of the housing, in front of which an internal filter is placed. The liquid must flow through the chamber into the chamber, from which it is returned to the bath. It is preferred within the scope of the invention that these internal filters are removable from the housing, so that the filter openings can be varied depending on the liquid to be cleaned. If coarse filtration is desired, the filter openings are larger than for fine filtration.

[0011] The internal filter preferably consists of a thin metal plate into which these filter openings are molded. Furthermore, additional receptacles or holders for the textile filter are provided on one edge of the internal filter, which is then covered by a front cover connected to the housing.

[0012] To facilitate changing the internal filter, the internal filter is equipped with access openings or handles for moving the internal filter. The internal filter is preferably guided in or on rails provided on the ceiling and / or floor of the housing. These rails run as close as possible to a vertical strip that protrudes inward from the inside of the side wall of the housing. This creates a nearly enclosed chamber, which is covered by the filter openings of the internal filter when in use.

[0013] The above-mentioned microfilter preferably consists of a textile material and is already mentioned in the applicant's European patent specification described in the prior art.

[0014] In practice, it has been shown that this possibility of multi-sided filtering of the liquid in the housing significantly increases the efficiency of the device.

[0015] This increase in efficiency is also achieved through a special design of the rotor, which draws in the fluid and feeds it into the housing. Separate protection is also sought for this design; of course, it has proven particularly effective in combination with the inventive concept described above. The rotor is to be designed as a double rotor, with a closed disc mounted on the rotating shaft, which is connected via vanes to a ring through whose opening the fluid enters the rotor. This double rotor makes it possible to force approximately ten times the amount of fluid per unit of time into the inlet and thus into the housing.

[0016] The rotor sits in a laminated core, which is covered at the bottom by a cover plate with an opening whose diameter is larger than the opening in the ring but smaller than the diameter of the ring itself. This allows the fluid to be drawn into the interior of the rotor.

[0017] The end plate is followed by a laminated core, forming a cylindrical recess in which the rotor rotates. However, this cylindrical recess is interrupted by an extension toward the aforementioned inlet, through which the fluid flows from the rotor into the inlet. From there, it flows into the housing.

[0018] The new development is characterized primarily by improvements to the electrical unit or control unit. This includes, above all, the ability to wirelessly connect the control unit to an app, allowing the entire device to be controlled from within the app. All device data, such as total running time, total cycle time, and maximum temperature, are recorded and stored in the app. It also includes, in particular, monitoring of the device's tilt angle, whereby tip-over protection can be activated and adjusted based on the tilt angle. The same applies to protection against forgetting the device in, for example, a deep fryer. However, these are just a few of the improvements to the control system. Character description

[0019] Further advantages, features and details of the invention will become apparent from the following description of preferred embodiments and from the drawing, which shows in Figure 1 a side view of a device according to the invention for removing foreign substances from a liquid; Figure 2 a front view of the device according to Figure 1 ; Figure 3 a plan view of the device according to Figure 1 ; Figure 4 a perspective exploded view of the device according to Figure 1 ; Figure 5 a perspective exploded view of a cleaning unit of the device according to Figure 1 ; Figure 6 a perspective exploded view of parts of the cleaning unit compared to the illustration according to Figure 5 rotated by about 90°; Figure 7 a perspective exploded view of a part of the cleaning unit of the device according to Figure 1 ; Figure 8a front view of the cleaning unit of the device according to Figure 1 with front cover removed; Figure 9 a cross section through the cleaning part according to Figure 7 along line VIII-VIII.

[0020] According to the Figures 1 to 4A device P according to the invention for removing foreign substances from a liquid comprises an electrical unit 1, a cleaning unit 2, and a collecting tray 3. The electrical unit 1 and the cleaning unit 2 are connected to one another via detachable fastening means 4.1 and 4.2, for example corresponding screws. When connected to one another in use, they form a unit that can be carried using handles 5.1 and 5.2 and can be placed together in the collecting tray 3. If the cleaning unit 2 is separated from the electrical unit 1 by loosening the fastening means 4.1 and 4.2, this cleaning unit 2 can be handled using an additional handle 6. Since the handle 6 is located on a front cover 7, which is connected to a housing 9 of the cleaning unit 2 via an articulated rod 8, this front cover 7 can also be rotated about the articulated rod 8 using the handle 6, thus opening the interior of the housing 9.

[0021] Since the present invention essentially relates to the cleaning unit 2, this is described in detail in the Figures 5 to 9 shown in more detail. The housing 9 can be seen, to which the front cover 7 is articulated via the articulated rod 8. For this purpose, the housing 9 has two elongated holes 11.1 and 11.2 in upwardly projecting tabs 10.1 and 10.2, between which the articulated rod 8 is inserted and which the front cover 7 laterally overlaps with side walls 12.1 and 12.2, with corresponding screws 13.1 and 13.2 penetrating holes 14.1 and 14.2 in the front cover 7 and engaging in threaded holes (not shown in detail) in the articulated rod 8.

[0022] At the front, the front cover 7, behind shielding plates 15, has a plurality of holes through which purified fluid can escape. Furthermore, the front cover 7 has a plug-in strip 16 in its lower region, with which the front cover 7, in the installed position, engages behind corresponding stops 17 on the housing 9, thus closing the housing 9. To open it, the front cover 7 is pulled upwards using the handle 6, so that the screws 13.1 and 13.2 slide upwards along the elongated holes 11.1 and 11.2 until the plug-in strip 16 disengages from the stop 17.

[0023] The housing 9 has two side walls 18.1 and 18.2, a cover 19, a base 20 and a rear wall 21. Inside the housing, according to the Figures 8 and 9a columnar inlet 22 extending from the floor 20 to a false ceiling 23 just below the ceiling 19. A plurality of outlets 25 are visible on its front side 24. Below the false ceiling 23, unspecified side walls of the columnar inlet 22 provide larger lateral outlet openings 42.1 and 42.2. Enclosed by the inlet 22 and the rear wall 21, a transfer opening 45 is provided in the floor 20, the connection of which will be described later.

[0024] Approximately in the middle of the housing 9, vertical strips 26.1 and 26.2 are provided, projecting inwards from the side walls 18.1 and 18.2, which together with an internal filter 27.1 and 27.2 form a chamber 43.1 and 43.2.

[0025] Each internal filter 27 is preferably made of a metal plate and has filter openings 28. In addition to the filter openings 28, the internal filter 27.1 or 27.2 has two access openings 29, in the area of ​​each of which a handle 30 is provided. Prong-like receptacles or holders 31 for a textile filter (described later) are provided on the front side of the internal filter 27.1 or 27.2.

[0026] In the housing 1, the internal filters 27.1 and 27.2 are guided on rails 32.1 to 32.4. Rails 32.3 and 32.4 run along the floor 20 to the rear wall 21, while rails 32.1 and 32.2 are arranged correspondingly on the false ceiling 23.

[0027] The housing 9 is further traversed by a rotary shaft 33, which serves to drive a rotor 34. This rotor 34 and its immediate surroundings are in Figure 7It can be seen that the rotor 34 consists of an upper disc 35 and an end ring 36, whereby the disc 35 and the ring 36 are connected to each other via vanes 37. The ring 36 surrounds, in Figure 7 not shown, a larger opening corresponding to the opening 38 in a cover plate 39. This opening in the ring 36 ensures that liquid to be cleaned can enter the rotor 34 up to the closed disc 35 between the vanes 37, wherein the liquid is then passed on to an extension 40 in a laminated core 41. The extension 40 passes the liquid through the transfer opening 45 into the column-shaped inlet 22 on the rear wall 21 of the housing, wherein the base 20 of the housing 9 is broken open in the area of ​​the extension 40 and the inlet 22.

[0028] The present invention functions as follows: To remove foreign matter from a liquid, the device comprising the electrical unit 1 and the cleaning unit 2 is inserted into a corresponding liquid bath. The electrical unit 1 drives the rotating shaft 33 and thus the rotor 34 in the laminated core 41. This rotor 34 sucks in liquid containing foreign matter through the ring 36, supported by the vanes 37, and presses this liquid into the extension 40 of the laminated core 41 and further through the transfer opening 45 into the column-like inlet 22. In practice, it has been found that this double rotor comprising a closed disk 35, an open ring 36, and vanes 37 can increase the suction power by a factor of 10.

[0029] The liquid then exits from the outlets 25 and the side outlets 42.1 and 42.2 into the interior of the housing 9. This enables a very good and even distribution of the liquid over the height of the interior of the housing 9.

[0030] Furthermore, it should be emphasized that according to the present invention, the liquid enters the front cover 7 from a very large distance from the front filter, held by the receptacles or holders 31 protruding from the internal filters 27.1 and 27.2, and can be evenly distributed throughout the housing interior. This enables a significantly better distribution of the liquid to be cleaned throughout the entire interior of the housing 9.

[0031] Furthermore, it is possible to use not only the filter in the front cover 7 for cleaning, but also to provide additional components in the housing 9 that can be used for cleaning. For this purpose, the liquid flows through the filter openings 28 in the internal filters 27.1 and 27.2, is filtered there, and then enters the respective chamber 43.1 or 43.2. From there, it exits through lower openings 44 in the respective side walls 18.1 or 18.2 and returns to the bath.

[0032] A fine filtering of the liquid is also carried out by the textile filter (not shown in detail) in the front cover 7, where the cleaned liquid then exits through the openings covered by the shielding plate 15. List of reference symbols

[0033] 1 Electrical unit 34 rotor 67 2 cleaning unit 35 disc 68 3 drip tray 36 ring 69 4 Fasteners 37 wing 70 5 Handle 38 opening 71 6 Handle 39 End plate 72 7 front cover 40 Expansion 73 8 Articulated rod 41 Sheet metal package 74 9 Housing 42 Side outlet opening 75 10 tab 43 chamber 76 11 slot 44 lower opening 77 12 side wall 45 Transfer opening 78 13 screw 46 79 14 Hole 47 15 shielding plate 48 16 Plug-in strips 49 17 stop 50 18 side wall 51 19 Ceiling 52 20 Floor 53 21 back wall 54 22 inlet 55 23 false ceiling 56 24 Front 57 25 Outlet 58 P device 26 vertical stripes 59 27 Internal filter 60 28 Filter opening 61 29 Access opening 62 30 Handle 63 31 Mount / holder 64 32 rail 65 33 rotating shaft 66

Claims

1. Device for removing foreign matter from a liquid by means of at least one filter, wherein the liquid with the foreign matter is fed from a bath to the filter by means of a rotor (34) via an inlet (22) in a housing (9) characterized in that the inlet (22) extends columnar vertically inside the housing (9) over at least a major part of a rear wall (21) of the housing (9) opposite to the filter and has outlets (25) on the front side and a chamber (43.1,43.2) for returning the liquid to the bath is provided on at least one side wall (18.1,18.2) of the housing (9), which is covered towards the interior of the housing (9) by an internal filter (27.1,27.2).

2. Device according to claim 1, characterized in that the columnar inlet (22) has lateral outlets (42.1,42.2) in the upper area extending to a ceiling (19) of the housing (9).

3. Device according to claim 1 or 2, characterized in that the internal filter (27.1,27.2) consists of a metal plate in which filter openings (28) are formed.

4. Device according to claim 3, characterized in that the internal filter (27.1,27.2) has receptacles or holders (31) for the filter at its edge opposite the rear wall (21) of the housing (9).

5. Device according to at least one of the preceding claims, characterized in that the internal filter (27.1,27.2) has engagement openings (29) or handles (30) for moving the internal filter (27.1,27.2).

6. Device according to at least one of the preceding claims, characterized in that the internal filter (27.1,27.2) is removably inserted into the housing (9).

7. Device according to claim 6, characterized in that rails (32.1-32.4) for guiding the internal filter (27.1,27.2) are arranged on the ceiling (19 or 23) and / or the bottom (20) of the housing (9).

8. Device according to claim 7, characterized in that the rails (32.1-32.4) are arranged so close to the chamber (43.1,43.2) that it is covered by the inserted internal filter (27.1,27.2).

9. Device according to at least one of the preceding claims, characterized in that the filter is covered by a hinged front cover (7), wherein the front cover (7) has shielded outlets for the purified liquid.

10. Device according to at least one of the preceding claims, characterized in that the rotor (34) is designed as a double rotor, in which a closed disc (35) is seated on the rotary shaft (33) and is connected via radial blades (37) to a ring (36), through the opening of which the liquid enters the rotor (34).

11. Device according to claim 10, characterized in that radial projections project downwards from the ring.

12. Device according to claim 10 or 11, characterized in that the rotor is partially covered downwardly by an end plate (39) which has an opening (38) whose diameter is larger than the opening of the ring (36) but smaller than the diameter of the ring (36).

13. Device according to claim 12, characterized in that the end plate (39) is followed by a laminated core (41) which forms a cylindrical recess in which the rotor (34) rotates.

14. Device according to claim 13, characterized in that the cylindrical recess is interrupted towards the inlet (22) by an extension (40) through which the liquid passes from the rotor (34) into the inlet (22).