Classifications

• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L15/00—Washing or rinsing machines for crockery or tableware
  • A47L15/0002—Washing processes, i.e. machine working principles characterised by phases or operational steps
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L15/00—Washing or rinsing machines for crockery or tableware
  • A47L15/42—Details
  • A47L15/4214—Water supply, recirculation or discharge arrangements; Devices therefor
  • A47L15/4225—Arrangements or adaption of recirculation or discharge pumps
• • A—HUMAN NECESSITIES
  • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
  • A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
  • A47L2601/00—Washing methods characterised by the use of a particular treatment
  • A47L2601/03—Pressurised, gaseous medium, also used for delivering of cleaning liquid

Definitions

• the invention relates to a device for conveying flowable substances and / or substance mixtures.
• Flowable materials such as. B. liquids, fine-grained bulk goods or mixtures of solid particles with liquids or gases, transported by means of pumps of various types, including by centrifugal pumps, piston pumps or diaphragm pumps etc.
• centrifugal effect causes gases or solid particles to separate, which affects the delivery rate and the efficiency of the pump.
• the invention is therefore based on the object of providing a device for conveying flowable substances which does not require any special inlet requirements and which has a simple construction.
• This object is achieved in that an arrangement is provided in which the substances are pressurized by a gaseous medium with a pressure which is alternately changed between two pressure levels so that the substances enter the arrangement at a low pressure level and by applying of the higher pressure level in the desired direction of conveyance.
• the device according to the invention can be constructed in an extremely simple construction, since basically, as explained in more detail below, only a hollow body with an inlet and an outlet has to be created in which a substance to be conveyed can be pressurized by means of a gaseous conveying medium. With the invention, a device for conveying flowable substances is created, which does not require any special inlet requirements and which has a simple structural design.
• the gaseous delivery medium is expediently pressurized by means of at least one compressor, which is a simple possibility for generating pressure in a gaseous delivery medium.
• the arrangement has at least one pressure chamber conductively connected to a container by means of a line, into which the gaseous conveying medium, controlled by a valve, is introduced, the pressure in the pressure chamber alternating between two pressure levels is changed so that at the low pressure level in the pressure container, the substances from the container into the pressure enter space, a valve for opening or closing the connection between the container and the pressure chamber is arranged between the container and the pressure chamber.
• the substances are further conveyed by applying the higher pressure level to the pressure chamber in a discharge line conductively connected to the pressure chamber, a valve for opening or closing the connection between the pressure chamber and the discharge line being arranged between the pressure chamber and the discharge line is and has the pressure chamber a further input controlled by a valve.
• the line extends from the container to the discharge line and has a branch to the pressure chamber, the entry of the gaseous conveying medium into the pressure chamber in the use position of the device at the top and the entry of the substances from the line into the use position the device is arranged at the bottom, whereby a further simplification in the structure of the device according to the invention has been achieved.
• the valve for opening or closing the connection between the container and the pressure chamber is a non-return valve, which closes an outlet opening of the container when a flow directed against the container occurs in the arrangement.
• the valve for opening or closing the connection between the pressure chamber and the discharge line is a check valve, which closes the discharge line when a flow directed against the container or against the pressure chamber occurs in the arrangement.
• a check valve also at this point in the arrangement, the control of the device according to the invention is considerably simplified compared to the use of an electromagnetic valve, for example.
• the check valve preferably has a spherical or conical closing body, which is the simplest and most effective option of a check valve.
• the compressor introduces the gaseous conveying medium into a pressure vessel connected to the compressor in the flow direction of the gaseous conveying medium.
• the valve for controlling the introduction of the gaseous conveying medium into the pressure chamber between the pressure vessel and the pressure chamber is arranged as intended.
• the arrangement has a connection between the discharge line and the compressor for the gaseous conveying medium, in which a further valve for controlling the introduction of the gaseous conveying medium into the discharge line is arranged.
• the substances in the arrangement are acted upon by the gaseous conveying medium with a pressure which is alternately changed between two pressure levels such that, at a low pressure level at which there is a negative pressure, the substances are sucked in and by applying the higher one Pressure levels at which there is overpressure are conveyed in the desired direction of conveyance. Since the gaseous pumping medium must also be sucked in for compression, this measure also uses this negative pressure, which is already present, to convey the substances, in particular to accelerate the filling of the pressure chamber with a new quantity of substance to be conveyed.
• the preferred embodiment of the invention is preferably designed so that the pressure in the pressure chamber is alternately changed between two pressure levels so that at the low pressure level in the pressure vessel, at which there is a negative pressure, the substances from the container conductively connected to this pressure chamber the pressure chamber is sucked in and by applying the higher pressure level at which an over- pressure prevails, into which discharge connected to the pressure chamber is conveyed.
• the device according to the invention works in two cycles. In the first cycle, substances are sucked into the pressure chamber by applying the negative pressure, and in the second cycle these substances are conveyed from the pressure chamber in the desired direction by applying an overpressure.
• the arrangement has a connection between the pressure chamber and a suction line of the compressor, the suction line of the compressor in the flow direction of the gaseous conveying medium after the branch for the connection to the valve further having a valve-controlled inlet of the pressure chamber has another valve for opening or closing the suction line to the environment.
• the gaseous conveying medium is preferably air, with which the most frequently occurring gas is used to convey the substances.
• the substances to be conveyed consist of gases, liquids or solids and / or mixtures thereof, which shows the great variety of applications of the device according to the invention.
• the substances are a liquid that may be loaded with solids and / or gases, possibly hot and / or foaming, which shows that even a liquid that may cause corrosion due to special additives is possible with the device according to the invention. It is also shown that the device according to the invention completely avoids the risk of cavitation even at higher temperatures and when solid particles are present.
• the device according to the invention is arranged in a dishwasher.
• the conveyed substance is known to be a cleaning liquid, which may be mixed with cleaning or rinsing agents and possibly also contaminated with removed food residues, with which the items to be cleaned in the dishwasher are applied. It has been shown in practice that by conveying the cleaning liquid with the inventive According to the device in a dishwasher particularly good cleaning results can be achieved.
• the described invention further relates to a dishwasher in which a device for conveying liquid is arranged according to at least one of the previously discussed claims.
• FIG. 2 shows a schematic illustration of the device according to the invention according to a further advantageous embodiment of the invention
• FIG. 3 shows a schematic representation of the device according to the invention in accordance with a preferred embodiment of the invention
• Fig. 4 is a schematic representation of a household dishwasher with the preferred embodiment of the invention.
• Fig. 5 shows the time course of a spray pulse according to a preferred
• the device according to the invention for conveying substances on a device for conveying liquids is shown and described.
• a device 1, 1 ", 1" according to the invention for conveying substances in the three exemplary embodiments shown and described has an arrangement 10, 10 ', 10 "in which the liquid is acted upon by a pressurized gaseous conveying medium. is struck, in the three exemplary embodiments shown and described according to the invention, the liquid in the arrangement 10, 10 ', 10 "is pressurized by the gaseous conveying medium with a pressure which is alternately changed between two pressure levels such that the liquid at a low pressure level flows and is conveyed in the desired direction of conveyance by applying the higher pressure level.
• a pressurized gaseous conveying medium it is possible to convey a liquid largely without moving mechanical units.
• the device does not require any technically complex inlet conditions.
• the gaseous conveying medium is pressurized by means of a compressor 2.
• Ver denser 2 that is to say at a pressure outlet 3 of the compressor 2
• a pressure vessel 4 is connected, into which the gaseous conveying medium is introduced and stored.
• the arrangement 10, 10 ', 10 has a pressure chamber 11 conductively connected to a container 9.
• the gaseous delivery medium controlled by a valve 5, is introduced into the pressure chamber 11
• control of the introduction of the gaseous conveying medium into the pressure chamber 11 is arranged in a connecting line 21 between the pressure container 4 and an inlet 20 of the gaseous conveying medium into the pressure chamber 11.
• a discharge line is provided with the pressure chamber 11 and the container 9 1 to 3, in the three exemplary embodiments shown and described, a line 13 is continued from the container 9 to the discharge line 12, which has a branch 14 to the pressure chamber 11.
• a valve 15 for opening and closing the connection between the container 9 and the pressure chamber 11 is arranged, which, in the three exemplary embodiments shown and described, is a non-return valve with a spherical or conical closing body, which provides a liquid outlet from the container 9 Occurs a flow directed against the container 9 closes.
• a valve 16 for opening and closing the discharge line 12 is arranged in the three exemplary embodiments shown and described, which, in the three exemplary embodiments shown and described, is a check valve with a spherical or conical closing body which closes the discharge line 12 when a flow directed against the container 9 or against the pressure chamber 11 occurs.
• the pressure chamber 11 has one further with a valve 17 controlled input 18 to which a vent line 19 is connected.
• the three exemplary embodiments shown and described also have in common that the inlet 20 of the gaseous conveying medium into the pressure chamber 1 1 in the position of use, ie from a frontal view of FIGS. 1 to 4, above and the inlet of the line 13, ie the branch 14, below is arranged.
• the substance - in the exemplary embodiment shown the liquid - is pressurized in the pressure chamber 11 by the gaseous conveying medium with a pressure which is alternately changed between two pressure levels such that the substance is at a low pressure level.
• the liquid - flows in and is conveyed in the desired direction of delivery by applying the higher pressure level.
• Valves 5, 16 and 17 are initially closed. Due to the conductive connection between the container 9 and the pressure chamber 11, the connection with the container 9 being arranged below its liquid level N1 in this exemplary embodiment shown in FIG. 1 extends in both containers 9 and 11 up to the liquid level N1 , By opening the valve 5, the gaseous delivery medium, which is under overpressure, is introduced into the pressure chamber 11, as a result of which the liquid is displaced to a lower level N2. The valve 15 is closed and the valve 16 is opened so that the liquid penetrates further into the discharge line 12, an equal amount of liquid being moved from the discharge line 12 into corresponding consumers. Now the valve 5 is closed and the valve 17 is opened, as a result of which the gaseous conveying medium located in the pressure chamber 11 escapes via the vent line 19.
• valve 15 opens so that liquid can flow from container 9 into pressure chamber 11.
• the valve 16 is closed due to the weight of the ball of the valve and the amount of substance located in the discharge line 12 above the ball of the valve 16. This process is now repeated as long as funding is needed.
• the arrangement 10 ′ has a connection 22 between the discharge line 12 and the compressor 2 for the gaseous conveying medium, in the embodiment shown example of management between the derivative 12 and the pressure vessel 4.
• a further valve 6 for controlling the introduction of the gaseous delivery medium into the discharge line 12 is arranged in the connection 22, the connection line 21 between the pressure vessel 4 and the inlet 20 of the gaseous delivery medium into the pressure chamber 11, as in that in FIG. 1 Embodiment shown, a valve 5 for controlling the introduction of the gaseous medium into the pressure chamber 11.
• the substance - in the exemplary embodiment shown the liquid - in the arrangement 10' is pressurized by the gaseous conveying medium which is alternately changed between two pressure levels so that at a low pressure level the substance - the liquid in the exemplary embodiment shown - flows in and is conveyed in the desired conveying direction by applying the higher pressure level, the application of the higher pressure level for applying the substance - in the exemplary embodiment shown the liquid - with an overpressure more than once, in the exemplary embodiment described twice, at short intervals.
• Valves 5, 6, 16 and 17 are initially closed, valve 8 is open.
• the liquid extends in both containers up to the liquid level N1 due to the conductive connection between the container 9 and the pressure chamber 11, the connection with the container 9 also being arranged below the liquid level N1 in this exemplary embodiment.
• the gaseous delivery medium which is under an overpressure, is introduced into the pressure chamber 11, as a result of which the liquid is displaced down to the lower liquid level N2.
• the valve 15 is closed and the valve 16 is opened so that the liquid penetrates further into the discharge line 12, an equal amount of liquid being moved from the discharge line 12 to corresponding consumers.
• valve 5 is closed and the further valve 6 for controlling the introduction of the gaseous conveying medium into the discharge line 12 is opened - or, in reverse order, the further valve 6 for controlling the introduction of the gaseous conveying medium into the discharge line 12 is first opened. net and then the valve 5 closed - whereby in both cases the gaseous medium is led into the discharge line 12 and the second application of the higher pressure level to act on the substance - in the embodiment shown the liquid speed - takes place with an overpressure, which causes the liquid in the discharge line 12 to be repressed, so that liquid is again moved to corresponding consumers.
• the valve 16 is closed.
• valve 6 is also closed and the valve 17 is opened, as a result of which the gaseous conveying medium located in the pressure chamber 11 escapes via the vent line 19.
• valve 15 opens so that liquid can flow from container 9 into pressure chamber 11.
• the valve 16 is held in the closed position. This process is now repeated as long as funding is needed.
• the arrangement 10 ′′ has, in addition to the arrangement shown and described in FIG. 2, a connection 23 between the pressure chamber 11 and a suction line 7 of the compressor 2, the suction line 7 of the compressor 2 in the flow direction of the gaseous delivery medium after the branch for the connection 23 to the valve 17 of the further inlet 20 of the pressure chamber 11 controlled by a valve 17 has a further valve 8 for opening or closing the suction line 7 with respect to the environment.
• the substance - in the exemplary embodiment shown the liquid - is acted upon by the gaseous conveying medium with a pressure which is alternately changed between two pressure levels such that the substance is at a low pressure level.
• the liquid flows and is conveyed in the desired conveying direction by applying the higher pressure level, but in the arrangement 10 "shown in FIG. 3, there is a negative pressure at the low pressure level, so that the substance shown in FIG Embodiment the liquid - is sucked in and there is an overpressure in the arrangement 10 "shown in FIG. 3 when the higher pressure level is applied.
• connection with a suction line 7 of the compressor 2 it is of course also possible to generate the required negative pressure with an additional compressor and to connect this to the connection 23.
• valves 5, 6, 8 and 16 are initially closed, the valves 15 and 17 are open, in this exemplary embodiment the liquid extends in the liquid container. container 9 to the liquid level N1 and in the pressure chamber 11 due to the suction function of the negative pressure described below to the much higher liquid level N1 ".
• the valve 17 and simultaneously opening the valve 5 the gaseous delivery medium under excess pressure is transferred to the pressure chamber 11 is introduced, whereby the liquid is displaced to a lower liquid level N 2.
• valve 15 is closed and the valve 16 is opened so that the liquid penetrates further into the liquid discharge line 12, an equal amount of liquid being moved from the liquid discharge line 12 to corresponding liquid consumers
• valve 8 is also opened so that the compressor 2 can suck in gas and the pressure and quantity of the gas are equalized.
• valve 5 can now also be closed in this preferred embodiment of the invention and the further valve 6 can be opened to control the introduction of the gaseous conveying medium into the discharge line 12 -
• the further valve 6 for controlling the introduction of the gaseous conveying medium into the discharge line 12 can be opened and then the valve 5 can be closed - whereby the gaseous conveying medium is directed into the discharge line 12 in both alternative program steps is and the second application of the higher pressure level for the application of the substance - in the exemplary embodiment of the liquid shown - with an overpressure, which causes a repressing of the liquid in the discharge line 12, so that liquid is again moved to the appropriate consumers.
• valve 16 is closed. Now the valve 6 and the valve 8 are also closed and the valve 17 is opened, as a result of which the gaseous conveying medium located in the pressure chamber 11 is passed via the ventilation line 19 and the suction line 7 to the compressor 2 and a negative pressure is created in the pressure chamber 11. Due to the negative pressure or, in the event that the valve 15 is not a check valve, by external control, the valve 15 now opens, so that liquid is sucked out of the container 9 into the pressure chamber 11 by the negative pressure prevailing in the pressure chamber 11. The valve 16 is held in the closed position. Now valve 17 is closed and at the same time valve 8 is opened again. This process is now repeated as long as funding is needed. With suitable cross sections and line lengths, a pipe constriction, such as. B. an orifice, or such a valve can be used that is only throttled or opened further instead of completely closing and opening.
• a pipe constriction such as. B. an orifice, or such a valve can be used that is only throttled or opened further instead of completely
• the device 1 "according to the invention for conveying substances is arranged in the preferred embodiment shown and described in FIG. 3.
• the device according to the invention Device 1 " is the gaseous conveying medium air and the substance to be conveyed is a cleaning liquid with which the items to be cleaned in the dishwasher 25 are charged, namely water, which may be mixed with cleaning or rinsing agents and possibly also contaminated with removed food residues is.
• the container 9 of the device 1 " is formed in the dishwasher 25 by the lowest section of a washing container 26, which is usually called a pump pot or drain pan and in which the items to be cleaned, for example cutlery, which are not shown and are filled into crockery baskets 27, 28 , Plates, cups, glasses, etc., is returned to the cleaning liquid which is to be cleaned is supplied with the cleaning liquid by spray devices, for example so-called spray arms 29, 30.
• the cleaning liquid in the arrangement shown and described in FIG Device 1 ", as described in relation to FIG. 4, is conveyed into the discharge line 12 connected to the feed lines to the spray arms 29, 30.
• FIG. 5 The time course of a spray pulse generated with the device 1 "shown in FIGS. 3 and 4 of the preferred exemplary embodiments of the invention is shown in FIG. 5, the figure showing the time course and the water pressure generated from the time the valve 17 was opened 5 and is about one second in the preferred embodiment of the invention described in FIGS. 3 and 4.
• Tp is now about a half over a period of time
• the impulse-like delivery of the cleaning liquid follows by opening the valve 5 with a pulse height If of approximately 310 millibars in the exemplary embodiment and the pressing by opening the valve 6 with a pulse height In of approximately 90 millibars in the exemplary embodiment a time period Ti of half a Se in the exemplary embodiment

Landscapes

• Engineering & Computer Science (AREA)
• Water Supply & Treatment (AREA)
• Jet Pumps And Other Pumps (AREA)
• Transmission Of Braking Force In Braking Systems (AREA)
• Threshing Machine Elements (AREA)
• Intermediate Stations On Conveyors (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=7637865

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (8)

• 2000
  • 2000-04-06 DE DE10017242A patent/DE10017242A1/de not_active Ceased
• 2001
  • 2001-04-03 ES ES01923712T patent/ES2241813T3/es not_active Expired - Lifetime
  • 2001-04-03 AU AU2001250414A patent/AU2001250414A1/en not_active Abandoned
  • 2001-04-03 EP EP01923712A patent/EP1272092B1/fr not_active Expired - Lifetime
  • 2001-04-03 WO PCT/EP2001/003791 patent/WO2001076449A1/fr active IP Right Grant
  • 2001-04-03 DE DE50106319T patent/DE50106319D1/de not_active Expired - Lifetime
  • 2001-04-03 AT AT01923712T patent/ATE296049T1/de not_active IP Right Cessation

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events