FR2517375A1 - DEVICE FOR THE INDIVIDUAL TRANSFER OF DOSE OF SEVERAL ACTIVE AGENTS THAT CAN BE PUMPS - Google Patents

Abstract

THE INVENTION CONCERNS A DEVICE INTENDED TO TRANSFER INDIVIDUALLY AND IN DOSES SEVERAL REACTIVE AGENTS THAT CAN BE PUMPED, EACH FROM A RESERVE TANK, TO A COMMON WORKING TANK, AND TO MIX THE ACTIVE AGENTS TRANSFERRED WITH ONE AGENTS. IN CASE THE ACTIVE AGENTS ARE WASHING PRODUCTS, THE WORKING AGENT IS WATER AND THE WORKING TANK IS A WASHING MACHINE LAUNDRY TANK. TANKS 1-5 AND A WORK AGENT SUCTION DUCT 11 CAN BE CONNECTED BY VALVES 12-17 COMMANDED INDIVIDUALLY TO A COLLECTOR CHANNEL19 WHOSE COLLECTOR OUTLET20 CAN BE CONNECTED WITH THE WORK TANK35 BY A SEALED PUMP21 .

Description

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  The present invention relates to a device for transferring individually and by doses several active agents that can be pumped, each from a reserve tank, to a common working tank, and to a device for transferring a plurality of active agents that can be pumped. mixing the active agents transferred with a working agent, especially in the case where the active agents are detergents,

  the work agent is water and the reservoir of

  Vail is a washing machine laundry tub.

  German Patent Application No. 1760512 discloses a device for dispensing and dosing a product.

  washing, composed of several incompatible constituents

  between them, in the liquid state.

  must deliver to a washing tank

  liquid, stored separately, at times and with determined dosages. But the reception of

  cleaning product is always the same because the different

  The quantities of the transferred metered components are predetermined by the inside diameter of the pipe.

  a rotary positive displacement pump used for this purpose.

  To achieve the desired goal, however, there is a need for variable receptions so that the known device is not suitable for use in machines

  in which the additions of product from the

  vape are chosen according to the kind of laundry

and its quantity.

  The application of Br evet REA No. 24 01 700 describes

  a control and injection device for feeding

  laundry machines, in which a

  pump is provided for each addition of liquid

  separately, this pump to be started

  at the desired moment by its own mechanism of temporisa-

  The separate pumps and their timing mechanism impose prices which are too high for washing machines or machines to be used for a period of time which is dependent on the quantity to be dosed.

  dishwashing machines which are for household use

  that, on the one hand, and on the other hand lead to considerable bulk and high cost prices. Moreover, the known device has no provision for

  avoid drying up or crystallising

  liquid juices that can come in contact with

  the atmosphere at the outlet of the pump lines.

  Furthermore, the German Patent Application No. 54,592 describes an automatic washing machine which largely eliminates the aforementioned drawbacks.

  this case also, the price of, for example, six pumps cor-

  each responding to a tank is still very high,

  even though these pumps may be driven by a

  In each of these pumps there must be associated a controlled clutch for bringing the active agents individually and in variable doses to a pre-mixing channel which, after dosing

  active agents, is rinsed and cleaned with water

  The residues of active agents can not therefore.

  stay in the canal or embed themselves or crystallize.

  According to one possibility of realization, the channel of

  previous angel stays constantly filled with water through

  a syphon which separates from the atmosphere the exits of

  But all these provisions are still relatively

  cumbersome and cotteuse The large number of

  In addition, this known washing machine is a cause of multiple failures.

  requires in the evacuation system, a branch-

  a separate circulation pump to circulate the detergent already in

the washing tub.

  The object of the invention is therefore to eliminate the drawbacks of the current technique by means of a

  device of the type mentioned in the preamble.

  According to the invention, this result is obtained by

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  the fact that the tanks and a suction pipe

  working agent can be connected by individually controlled valves to a collector

  whose collector output can be connected with the o-

  The present invention provides the present invention with the advantage that a single pump is necessary for all agents.

  assets in reserve Valves that are planned individually

  dually for each tank as this will be ex-

  plicated later can 8 be carried out so

  very simple; all the elements necessary for the dis-

  according to the invention can be arranged according to

  However, when the device is shut down, active agents should be kept

the atmosphere.

  Other features and advantages of the

  will appear in the following description which will be

  FIG. 1 is a diagram of a device according to the invention, FIG. 2 is a view from above of a possible embodiment of a device according to the invention. the invention,

  Figure 3 is a section along line III-

III of Figure 2,

  Figure 4 is a simplified diagram of the

  the valve actuator in the case of a reversible pump motor, and Figure 5 is a similar diagram for the control of the valves in the case of use of a one-way engine and clutches orders.

  Active agent reservoirs 1 to 5 are

  1.ied by lines 6 to 10 at valves 13 to 17

  individually by means of a pipe

  additional, which is connected with water or

  In the laundry tub 35 of a washing machine not shown in detail, and a valve 12, the laundry tub 33 is connected to the channel 19.

  valves L 3 to 17 are also connected to this channel

  The control device 33 comprises all the position indicators 26 to 32 and is driven according to the needs by a motor 23, via a clutch 34 the control device 33 and the collector channel 19 are part of L The collecting duct 19 is designed in such a way that a good rinsing is ensured and that during

  the stopping periods of the pump 21, of small quantities

  active agent, possibly flowing from

  13 to 17 can not be mixed together. In the case of a collector channel 19, shown

  result can be achieved by introducing a

  34 which virtually divides channel 19 into individual rooms which are nevertheless connected in series

  behind each other so that when the

  pope 12 is open and the pump 21 is running,

  circulating water in the direction of the cir-

  in the collector channel 19, at high speed.

  In the exemplary embodiment illustrated by

  Figures 2 and 3, the conditions mentioned above

  are fulfilled thanks to a different provision

  valves and the collecting channel.

  Whenever one of the valves 12 to 17

  is open, the agent concerned can be sucked

  manifold 19 by the pump 21, via

  of the pipe 20, and be transferred to the tank at

  sive 35 by the pipe 22 The motor 23 ensures the

  This motor can be coupled with the control device 33 by the clutch 24 and with the pump 21 by means of the clutch 25.

  As will subsequently appear, a real

  particularly simple implementation can be obtained by

  the fact that the direction of rotation of the motor

  23 can be reversed.

  clutches 24 and 25 to use freewheel couplings of one is entratné by the rotation to the left and the other by the rotation to the right Thus, by a simple reversal of the direction of rotation of the drive motor 23, it It is possible at will to drive, either the control device 33 or the pump 21 In the case of using a pump that discharges only in one direction of rotation, another simplification could be made by removing the clutch. 25; the drive motor 23 and the pump 21 could then be

rigidly coupled.

  If, for example, the pump pumps back during the

  on the left, the coupling-24 must be driven

by the rotation on the right.

  The controller 33 includes

  deciders of 26 to 32 of known type, which mark

  the positions of each of the valves 12, 17

  may be of the mechanical or electrical mechanical type

  that, for example a combination of magnets and contacts with flexible blades or a contact rubbing on a contact track, or even pairs of contacts controlled

  The indicator 36 indicates a position of

  pos 37 in which all the valves 12 to 17 are

  The indicators can be ordered directly

  by the valves or by a control disk

  the operation is associated with the positions of the

popes.

  Indicators can act in two different ways.

  on the progress of the dosing operations.

  On the one hand, the indicators can be connected in the electrical control circuit and when a valve position selected by a control device

  not shown, they can indicate the

  the control device for the invi-

  to start the pump 21 Another possibility is to

  exists when the indicators are connected directly

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  in the drive circuit of the pump; in this case, the transition from the valve selection to

  start-up of the pump can be done directly

by the indicator considered.

  In this case, the reversible direction motor 23 is controlled by one of the indicators 27 to 32 of the selector valve 12-17. This means that the motor rotates in the direction of rotation which causes

  the control device 33 until at least

  the position of the valve, for example 14,

  the indicator, for example 29 Then, the direction of rotation of the motor 23 is reversed, to drive

  then the pump 21 The duration of operation of the pump

  pe is proportional to the value of the dosage and she

  is determined by the control device, not

  Presented It is to be expected that the flow of the

  pump 21 is noticeably different due to differences

  viscosity of the active agents or different discharge heights, the time control of the pumping operation can be

  under the control of a flowmeter located in the

  course of conduct 20 or 22, or may be conducted ex-

  - exclusively under this dependence.

  In the device according to the invention, the

  Positive control 33 with indicators 26 to 32

  and the valves 12-1 / the pump 21, the drive motor

  23 and the clutches 24 and 25 can be assembled

  In a particularly simple manner in a compact metering unit FIGS. 2 and 3 show such a metering unit. FIG. 2 is a view from above and in partial section of the metering unit which is arranged in a flat cylindrical casing. 180 The shovel is made up of two shells: the shell

  lower level in which the

  33 riveted and exit to the valves and the collector channel

  reader 19, and it is assembled with the housing of the

  The valves, for example the valve 16,

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  each carries a rocker arm L, 60 inserted into the shell of the casing located in the city of the engine, this caliper being pressed under pressure against a pipe section 161 O, so that this pipe made of an elastic material is compressed and its opening In the engine crown shell there is a pressure plate 162 below the tilting yoke 160 which is pushed against the pipe 161 by a spring 163. FIG. 3 shows the position of the piston. Tilting stirrup 160, in which the valve 16 is closed The contents of the reservoir 4 (FIG. 1)

  connected to line 9 can not therefore pass to the col-

  reader L 9 which, in the example of Figures 2 and 3, is annular By the opening directed upwards on the

  Figure 2 and to the right in Figure 3 the

  The duct 20 is connected to the collector channel 19, leading to the pump 21. No valve is associated with this opening in the casing 180. The ducts 6 to 10 which end at the star-shaped tubing are connected to the collector duct 19 of FIG. ring, by valves similar to the valve 16 and which

  are closed or opened individually according to

  mounting of the control device 33.

  The control device 33 is arranged on the rear-facing box part according to Figure 2, below on the Fie 3 This device comprises a control disk 330 which is mounted in the casing shell to be able to turn when is in the rest position, this control disk 330 pushes the calipers of all the valves against the corresponding pipe sections In the example shown in FIG. 2, the control disk is positioned so that the valve 17 (that of FIG. high among the two that are visible) is open Its stirrup 170 associated is raised and releases the pipe section 171 In this position of the control disk 330, is then a lodgement (not shown) located on the circle of contact points of all the calipers of the valves, and into which penetrates the valve caliper

  under the effect of the elasticity of the material of the

<pipe.

  The control device furthermore comprises

  an annular plate 331 of printed circuits on the

  Welded at appropriate points 332, magnetic field-sensitive components, for example, magnetic cells 334 are provided.

  provided for in specified positions in the circumference

  control disk 330 and, when these areas are

  No. 334 are in front of the Hall cells 333, a signal is emitted by the printed circuit board 331 on the contact pin 335, this signal being processed in a control device, not shown,

  for a given angular position of the compression disk

  In the example of Figures 2 and 3, eight posi-

  possible versions of the control disk 330 are provided

  preferably with four points 332 to which

  hall cells 333 and which may correspond

four magnetic zones 334.

  The shaft 230 of the motor ends inside the box 1 VO It is coupled in rotation with a coupling flange 231 which can drive the shaft

  210 of the pump 21 in the direction of the needles of a

  (Figure 2) by means of a snap-on 232 disposed on the inside of the pump shaft 212.

  usual way a pebble star 211, whose

  while turning, crush a pipe 213 disposed in the housing 212 of the pump by driving back to the outlet 22

  from this pump the liquid that is there.

  To the outside, the coupling flange

  231 a, it on the control disk 330 through the

  233 As long as the glue

  The coupling flange 231 rotates with the motor shaft 230 counterclockwise (FIG. 2), the control disc 330 rotates in the same direction. The housing, not shown, of the disc of FIG. The control 330 then moves to the caliper of the next valve and opens the latter. When a known combination of a Hall cell 333 and a magnetic zone 334 corresponding to each other occurs.

  present, the rotation of the motor 23 is reversed from

  As the control disk 330 stops, the valve

  corresponding is open and the pump is driven.

  The pump 21 then draws active agent from the reservoir 4 through the pipe 20, the annular channel 19, the valve 16

  and driving 9 until the communication device

  However, the direction of rotation of the motor 23 is reversed again.

  so that the control disk 330 moves

  at another valve position If this new valve position is that shown at the top right of Figure 2, the suction line 11 of the laundry tub is connected with the annular collecting channel 19 which has a wall separation piece, not shown, between this mouth and that of the suction pipe 20 The direction of rotation of the motor 23 is again reversed (now turning in the direction of clockwise) so that the pump 21 passes from the laundry from the laundry tub 35, the line 11, the valve 12, the collection channel 19, the suction line 20, the pump 21 and the pipe

  22, to the laundry tub 35 Thus, the circulating water

  passing through the collector channel 19, from the top right downwards in a clockwise direction

  so that turbulence is formed on all sides.

  In this way, all the active agents sucked by the collector channel 19 can be transferred into the valves and removed from the active agent.

laundry tub 35.

  When the control disk 330 is set so that its housing arrives below the pipe 20, it is in its rest position. In this position, the seven valves arranged in the valve unit 1 R are all closed. present

  embodiment, the valve associated with the

  3 bulrush Z is not connected to any tank It can be closed with a plug to avoid the aspiration of air This tubing can be used in the case

  connection to another tank.

  Figures 4 and 5 are each a possible example of the connections of indicators 26 to 32 in

  the circuit of the pump motor 23, in case of use

  Use of a reversible drive motor (for example a capacitor motor) or of use

  motor with a single direction of rotation, for example with

  electromagnetic clutches 37 and 38.

  The course of a dosing operation will be described in more detail with regard to these circuits,

together with Figure 1.

  Before the start of the dosing operation, the so-steps unit -18 is in the rest position in which the indicators 26 to 32 are in the positions shown in FIGS. 4 and 5 In this position, all the valves 12 to 17 are closed, and the drive motor 23 is not energized. If the control 36 wants to transfer an active agent from the tank 1, this control 36 supplies the motor by means of the contacts I, II of the indicator 28, which may be for example a reed switch, closed by the valve 33 13 itself closed, so that the engine entralne

  the control device 33 by the direct coupling

  As soon as the control device 33 has opened the desired valve 13, the indicator 28 passes over the

  contacts I, III so that the direction of rotation of the

  drive train 23 is reversed and the engine

  now drives the pump 21 by means of the coupling

  Rectifying 25, control 36 includes a switch whereby the running time of the pump can be limited. Thus, a desired amount of active agent

  is sucked up After the pumping operation, the

  between control 36 and indicator 26 is de-

  connected and the driver towards the indicator 27 is

  As the valve 12 which

  respond is formed, the indicator is in the position I II so that the drive motor 23 now rotates in the first direction of rotation

  wherein the control device 33 is entrained.

  This control device 33 rotates until the valve 12 is opened, so that the indicator 27

  passes on the contacts I III and that the sense of rota-

  The drive motor is inverted to operate the pump at this time.

  washing of the laundry tub 35 is sucked in by the

  11, and, in the manner described above,

  When this flushing operation is triggered, the control 36 interrupts the flushing so that the conductor leading to the indicator 27 is disconnected and the one leading to the indicator 26 is connected. The contacts I and II of this indicator are closed so that the drive motor 23 again starts the controller 33 until the control disk (330 in FIG. 3) arrives in the rest position in which the contacts I and III of the indicator 26 are closed. The drive motor 23 is then disconnected; all valves 12 to 17 are closed and I II contacts of all other indicators

  27 to 32 are closed and the dosing operation is complete.

  born. If two or more components are to be dosed immediately one after the other, the passage of one

  constituent tank to the other can be made directly

  and the intermediate rinsing with water or the swarm and the transition to the rest position

then be deleted.

  In correspondence with the exemplary circuit of FIG. 4, the indicators 26 to 32 shown in FIG. 5 do not control the direction of rotation of the

  motor 23 but connect or disconnect the electro-

  corresponding magnets 37 and 38 of the clutches 24 and 25.

Claims (8)

CLAIMANT 05   1 Device for individual transfer   and several doses of active agents   to be pumped, each from a reservoir of   reserve, to a common working tank, and to   change the active agents transferred with a working agent, particularly in the case where the active agents are detergents, the working agent is water   and The working tank is a laundry tub of   washing machine, characterized in that the   tanks (1-v) and an agent suction line   (11) can be connected by means of valves (12-   17) individually controlled to a collection channel (19) whose collection outlet (20) can be connected to the working tank (35) by a pump, (21) airtight.   2 Device according to claim 1, characterized   in that the pump (21) and a   Mande (33) for the valves (2, 17), are driven by a same motor (23) being coupled with the motor (33),   each by a controlled clutch (24, 37; 25, 3 R).   3 Device according to claim 1, characterized   characterized in that the pump (21) is urged in one direction   of rotation and the control device (33) of the   popes (2, -17) is entangled in the other direction of rotation   by a motor (23) reversible direction of rotation.   4 Device according to claim 3, characterized   characterized in that a directional coupling acting in one direction (24, 25; 232, 23 '3) is interposed between the motor (23)   and the pump (21) or the control device (33).   Apparatus according to any one of the   Claims 2 to 4, characterized in that the valves (12-17) are arranged in a shaped housing (LPO)   star around the collecting channel (19).   Device according to claim 5, characterized   characterized in that each valve (p e 16) comprises a section of flexible elastic hose (16 l) and a stirrup   (160 o) fulfilling the function of a closure member.   7 Device according to claim 5 or 6, characterized in that the control device (33) cormporte a control disk (330) which cooperates with the stirrups of the valves (160).   PQ Device according to any one of the   Claims 1 to 7, characterized in that it comprises   a commanded position in which all the pes (12, 17) are formed.   9 Apparatus according to any one of the   Claims 1 to 9, characterized in that the pump (21)   consists of a rotary positive displacement pump.