EP4395942A1 - Treibdüse und flächenreinigungskopf mit einer treibdüse - Google Patents
Treibdüse und flächenreinigungskopf mit einer treibdüseInfo
- Publication number
- EP4395942A1 EP4395942A1 EP22768770.4A EP22768770A EP4395942A1 EP 4395942 A1 EP4395942 A1 EP 4395942A1 EP 22768770 A EP22768770 A EP 22768770A EP 4395942 A1 EP4395942 A1 EP 4395942A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- nozzle
- channel
- outlet opening
- cleaning
- propulsion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3421—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber
- B05B1/3431—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves
- B05B1/3442—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with channels emerging substantially tangentially in the swirl chamber the channels being formed at the interface of cooperating elements, e.g. by means of grooves the interface being a cone having the same axis as the outlet
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B1/00—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means
- B05B1/34—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl
- B05B1/3405—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl
- B05B1/341—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet
- B05B1/3484—Nozzles, spray heads or other outlets, with or without auxiliary devices such as valves, heating means designed to influence the nature of flow of the liquid or other fluent material, e.g. to produce swirl to produce swirl before discharging the liquid or other fluent material, e.g. in a swirl chamber upstream the spray outlet with a return channel extending from the swirl chamber by-passing the swirl imparting means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B14/00—Arrangements for collecting, re-using or eliminating excess spraying material
- B05B14/30—Arrangements for collecting, re-using or eliminating excess spraying material comprising enclosures close to, or in contact with, the object to be sprayed and surrounding or confining the discharged spray or jet but not the object to be sprayed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B05—SPRAYING OR ATOMISING IN GENERAL; APPLYING FLUENT MATERIALS TO SURFACES, IN GENERAL
- B05B—SPRAYING APPARATUS; ATOMISING APPARATUS; NOZZLES
- B05B3/00—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements
- B05B3/02—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements
- B05B3/04—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet
- B05B3/06—Spraying or sprinkling apparatus with moving outlet elements or moving deflecting elements with rotating elements driven by the liquid or other fluent material discharged, e.g. the liquid actuating a motor before passing to the outlet by jet reaction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/024—Cleaning by means of spray elements moving over the surface to be cleaned
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/02—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid
- F04F5/10—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow the inducing fluid being liquid displacing liquids, e.g. containing solids, or liquids and elastic fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04F—PUMPING OF FLUID BY DIRECT CONTACT OF ANOTHER FLUID OR BY USING INERTIA OF FLUID TO BE PUMPED; SIPHONS
- F04F5/00—Jet pumps, i.e. devices in which flow is induced by pressure drop caused by velocity of another fluid flow
- F04F5/44—Component parts, details, or accessories not provided for in, or of interest apart from, groups F04F5/02 - F04F5/42
- F04F5/46—Arrangements of nozzles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
- B08B3/028—Spray guns
Definitions
- the invention relates to a propulsion nozzle for a jet pump of a surface cleaning head, with cleaning liquid under pressure being applied to a surface to be cleaned by means of the surface cleaning head and then being sucked up by means of the jet pump, with the propelling nozzle having a nozzle body which is connected to a supply line for pressurized cleaning liquid can be connected and has a nozzle outlet opening for dispensing a jet of cleaning liquid.
- the object of the present invention is therefore to further develop a propulsion nozzle of the type mentioned at the outset in such a way that it enables good suction with less cleaning liquid consumption.
- the propulsion nozzle has a nozzle body, the interior of which has a conical end section. At the tip of the conical end section, the nozzle body has a nozzle outlet opening, through which the pressurized cleaning liquid can be discharged from the driving nozzle.
- a nozzle insert is arranged in the conical end section, which has a cylindrical base and a truncated cone-shaped extension adjoining it in the direction of the nozzle outlet opening. A lateral surface of the truncated cone-shaped extension is in positive contact with an inner wall of the conical end section.
- the nozzle insert has a through-channel that is aligned with the nozzle outlet opening, as well as a plurality of swirl channels that are molded into the lateral surface of the extension.
- Pressurized cleaning liquid can be supplied to the swirl chamber via relatively large flow cross-sections, and from the Swirl chamber, the cleaning liquid can be delivered over a relatively small flow cross section.
- the cleaning liquid is discharged from the swirl chamber via the nozzle outlet opening.
- the flow cross section of the nozzle outlet opening is at most one third of the sum of the flow cross sections of the through channel and the swirl channels. It has been shown that particularly effective suction can be achieved in this way with relatively little consumption of cleaning fluid.
- the flow cross section of the nozzle outlet opening is at most one fifth of the sum of the flow cross sections of the through channel and the swirl channels.
- the nozzle insert can have, for example, 2, 3, 4, 5 or 6 swirl channels.
- its nozzle parameter is 0.18 l/min to 0.35 l/min, in particular 0.18 l/min to 0.28 l/min, at a reference pressure of 1 bar.
- the nozzle parameter is defined here as the flow rate at a specific reference pressure, specifically the flow rate of the cleaning liquid flowing through the drive nozzle at a reference pressure of 1 bar is preferably 0.18 l/min to 0.35 l/min, in particular 0.18 l/min up to 0.28 l/min.
- the propulsion nozzle has a filter device which is arranged upstream of the nozzle insert in the interior of the nozzle body. The filter device is thus integrated into the propulsion nozzle.
- the filter device has a cup-shaped, bell-shaped or convexly curved filter surface. This allows the installation space required for the filter device to be reduced without the cleaning liquid suffering large flow losses as it flows through the filter device.
- the filter device preferably has a sieve.
- the mesh size of the sieve is preferably 0.6 mm, in particular a maximum of 0.3 mm.
- the screen is preferably made of metal, in particular steel, and/or a plastic material.
- the diameter of the passage channel of the nozzle inlet of the propulsion nozzle is preferably about 0.8 mm.
- two diametrically opposite spray arms are used, on each of which a cleaning nozzle is arranged, the cleaning nozzles being able to be acted upon simultaneously with cleaning liquid under pressure.
- the housing 16 defines a distributor space 32 which accommodates a liquid distributor device 34.
- An inlet line 36 protrudes into the distribution space 32, which is connected to the liquid distribution device 34 and which, at its end facing away from the liquid distribution device 34, carries a connection element 38, to which, for example, a connection element is known per se and is therefore not shown in the drawing to provide a better overview
- Spray lance of a high-pressure cleaning device can be connected.
- a cleaning liquid preferably water
- a cleaning liquid can be pressurized in a known manner and can be supplied to the surface cleaning head via the spray lance.
- the pressure of the cleaning liquid can be, for example, 50 bar to 180 bar, in particular 70 bar to 120 bar.
- the longitudinal axes 109 of the swirl ducts are skewed to the longitudinal axis 101 of the through-duct 100.
- the flow cross-sections of the swirl ducts 108 are larger than the flow cross-section of the nozzle outlet opening 92.
- the flow cross-sections of the swirl ducts 108 are preferably also larger than the flow cross-section of the through-duct 100.
- the jet pump 44 has a high suction efficiency, ie it enables a strong suction flow to be formed with relatively little consumption of pressurized cleaning liquid. About one third of the cleaning liquid that is provided to the surface cleaning head 10 is used to generate the suction flow and about two thirds of the cleaning liquid that is provided to the surface cleaning head 10 is sprayed onto the surface 12 .
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Nozzles (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021122710.0A DE102021122710A1 (de) | 2021-09-02 | 2021-09-02 | Treibdüse und flächenreinigungskopf mit einer treibdüse |
| PCT/EP2022/073471 WO2023030966A1 (de) | 2021-09-02 | 2022-08-23 | Treibdüse und flächenreinigungskopf mit einer treibdüse |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP4395942A1 true EP4395942A1 (de) | 2024-07-10 |
| EP4395942B1 EP4395942B1 (de) | 2025-08-06 |
| EP4395942C0 EP4395942C0 (de) | 2025-08-06 |
Family
ID=83280449
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22768770.4A Active EP4395942B1 (de) | 2021-09-02 | 2022-08-23 | Treibdüse und flächenreinigungskopf mit einer treibdüse |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP4395942B1 (de) |
| CN (1) | CN117729979A (de) |
| DE (1) | DE102021122710A1 (de) |
| WO (1) | WO2023030966A1 (de) |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT177666B (de) * | 1952-03-13 | 1954-02-25 | Walther & Cie Ag | Düse zur Erzeugung eines Drehstrahles, insbesondere für Feuerlöschzwecke |
| US4260110A (en) * | 1977-02-18 | 1981-04-07 | Winfried Werding | Spray nozzle, devices containing the same and apparatus for making such devices |
| US6561440B1 (en) * | 2001-11-14 | 2003-05-13 | Spraying Systems Co. | Full cone spray nozzle for metal casting cooling system |
| DE102008011506A1 (de) * | 2008-02-22 | 2009-08-27 | Alfred Kärcher Gmbh & Co. Kg | Flächenreinigungskopf |
| DE102008025325A1 (de) | 2008-05-27 | 2009-04-16 | VOGT AG Feuerwehrgeräte- und Fahrzeugbau | Strahlpumpenverdichter zum Erzeugen von Druckluftschaum CAFS-(Compressed Air Foam System) |
| EP2440338B1 (de) | 2009-06-12 | 2014-01-08 | Alfred Kärcher GmbH & Co. KG | Flächenreinigungskopf |
| ES2637831T3 (es) * | 2009-11-06 | 2017-10-17 | Gjosa Sa | Salida para una instalación de lavado |
| DE102010003079A1 (de) * | 2010-03-19 | 2011-09-22 | Alfred Kärcher Gmbh & Co. Kg | Flächenreinigungskopf und Flächenreinigungsanordnung |
| DE202016103825U1 (de) * | 2016-07-14 | 2017-10-20 | SWEDEX GmbH Industrieprodukte | Drallkörper sowie Kegeldüse mit einem solchen Drallkörper |
-
2021
- 2021-09-02 DE DE102021122710.0A patent/DE102021122710A1/de active Pending
-
2022
- 2022-08-23 CN CN202280048587.6A patent/CN117729979A/zh active Pending
- 2022-08-23 WO PCT/EP2022/073471 patent/WO2023030966A1/de not_active Ceased
- 2022-08-23 EP EP22768770.4A patent/EP4395942B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN117729979A (zh) | 2024-03-19 |
| EP4395942B1 (de) | 2025-08-06 |
| WO2023030966A1 (de) | 2023-03-09 |
| DE102021122710A1 (de) | 2023-03-02 |
| EP4395942C0 (de) | 2025-08-06 |
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