WO2015022010A1 - Système de pompage de liquide - Google Patents

Système de pompage de liquide Download PDF

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Publication number
WO2015022010A1
WO2015022010A1 PCT/EP2013/066843 EP2013066843W WO2015022010A1 WO 2015022010 A1 WO2015022010 A1 WO 2015022010A1 EP 2013066843 W EP2013066843 W EP 2013066843W WO 2015022010 A1 WO2015022010 A1 WO 2015022010A1
Authority
WO
WIPO (PCT)
Prior art keywords
liquid
control device
valve body
flow
liquid pump
Prior art date
Application number
PCT/EP2013/066843
Other languages
German (de)
English (en)
Inventor
Bernhard Beck
Gottfried Benzler
Original Assignee
Alfred Kärcher Gmbh & Co. Kg
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alfred Kärcher Gmbh & Co. Kg filed Critical Alfred Kärcher Gmbh & Co. Kg
Priority to PCT/EP2013/066843 priority Critical patent/WO2015022010A1/fr
Priority to EP13750296.9A priority patent/EP3033529A1/fr
Publication of WO2015022010A1 publication Critical patent/WO2015022010A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B2203/00—Details of cleaning machines or methods involving the use or presence of liquid or steam
    • B08B2203/02—Details of machines or methods for cleaning by the force of jets or sprays
    • B08B2203/0223—Electric motor pumps

Definitions

  • the invention relates to a liquid pump arrangement, in particular for use in the household and / or garden, comprising a motor and a pump for conveying a liquid, a check valve which is arranged in a flow channel through which the liquid can flow, a sensor device for providing a sensor signal as a function of a pressure and / or flow state of the liquid prevailing downstream of the check valve, and a control device which is able to supply a supply voltage from a voltage supply connection and which is connected to the sensor device, wherein the motor can be automatically switched on and off by the control device as a function of the latter downstream of the check valve prevailing pressure and / or flow state of the liquid.
  • Fluid pump assemblies having a motor and a motor-driven pump are known in various configurations. They are used, for example, for domestic and / or garden use, whereby rainwater from their collection point, for example a pond or a rainwater tank, can be conveyed to a liquid delivery device connected to the liquid pump arrangement.
  • a liquid delivery device for example, a faucet, a spray nozzle or a spray gun can be used.
  • the user can optionally open and close the liquid delivery member.
  • Such fluid pump assemblies are known from the publication DE 199 23 357 AI.
  • a control device is used to control the pump for use with a flow sensor arranged downstream of the pump and a separately formed pressure switch arranged downstream of the flow sensor.
  • the motor of the liquid pump arrangement can be reached when a max. maldruckes be switched off and a restart of the engine can be done with detection of larger flow rates.
  • the liquid pump assembly goes into a standby state, in which only the control arrangement but not the motor a supply voltage is provided.
  • the motor is switched on, a transition from the standby state to an active operating state takes place in that a supply voltage is also provided to the motor.
  • the transition of the liquid pump assembly from standby to active and back to standby can be easily controlled by the user by opening and closing the liquid delivery member. If the liquid delivery member is open, the liquid flows through a flow channel. If the user closes the liquid delivery member, the flow of the liquid is eliminated and liquid is trapped between the liquid delivery member and a check valve of the liquid pump assembly and a certain liquid pressure builds up in that region. The pressure of the liquid prevailing downstream of the check valve and / or the flow rate of the liquid can thus be used in a simple manner for controlling the motor.
  • the known liquid pump arrangement In the standby state, the known liquid pump arrangement has a lower energy consumption than in the active operating state. However, the energy consumption in the standby state is not completely negligible. This is especially true when the liquid pump assembly is permanently used, for example, in a domestic waterworks, wherein between two active operating conditions, a long-lasting standby state may be present.
  • Object of the present invention is to develop a liquid pump assembly of the type mentioned in such a way that their energy consumption can be reduced in the standby state.
  • This object is achieved in a liquid pump arrangement of the generic type according to the invention that the liquid pump assembly comprises a switching device, by means of the switching device, the control device to the power supply terminal connectable and separable from this depending on the prevailing downstream of the check valve pressure and / or flow state Liquid.
  • the motor can be turned on and off in response to the pressure and / or flow state of the liquid downstream of the check valve, but also the supply voltage of the control means required to operate the liquid pump assembly depending on the downstream of Provided check valve prevailing pressure and / or flow state of the liquid.
  • This makes it possible, after closing the liquid discharge member due to the then downstream of the check valve adjusting pressure and / or flow state of the liquid first by means of the control device to turn off the engine, and then depending on the pressure prevailing downstream of the check valve pressure and / or Flow state of the liquid to make a transition to a de-energized standby state by the control device is separated by means of the switching device from the power supply terminal.
  • connection between the voltage supply connection and the control device can be re-established automatically by the switching device at a later time, provided that the pressure and / or flow state of the liquid changes again downstream of the check valve. The latter is the case when the user reopens the liquid delivery member.
  • the liquid pump arrangement according to the invention consumes no energy. However, it can change over from this de-energized standby state to the active operating state at any time by see the power supply terminal and the control means by means of the switching device is restored depending on the pressure and / or flow state of the liquid downstream of the check valve.
  • control device is separable from the power supply terminal, if the pressure of the liquid downstream of the check valve exceeds a maximum value. If the user closes the liquid delivery device after an active phase of operation of the liquid pump arrangement, the pressure of the liquid rises in the region between the check valve and the liquid delivery device. If the pressure of the liquid exceeds a predetermined maximum value, then the connection between the voltage supply connection and the control device can be interrupted by the switching device.
  • the control device is separable from the power supply connection, provided that the pressure of the liquid downstream of the check valve exceeds a maximum value for longer than a predetermined minimum duration. If the pressure of the liquid drops again before the predetermined minimum duration has elapsed, the connection between the voltage supply connection and the control device is not interrupted.
  • the minimum duration may be, for example, 2 minutes, 1 minute or even less than 1 minute.
  • the motor of the pump is switched off by means of the control device, when the flow of liquid in the flow channel is omitted, and the connection between the power supply terminal and the control device is separable if the pressure of the liquid downstream of the check valve exceeds a predetermined maximum value.
  • the liquid delivery member By closing the liquid delivery member eliminates the flow of liquid in the flow channel and then there is first a transition from the active operating state of the liquid pump assembly into a first standby state with low energy consumption, wherein in first standby state, the motor of the pump is turned off and the controller is still connected to the power supply terminal.
  • the switching off of the motor eliminates the conveying effect of the pump and between the check valve and the liquid discharge member forms an increase in pressure. If the pressure exceeds a predetermined maximum value, a transition to a second standby state takes place in that the connection between the voltage supply connection and the control device is disconnected from the switching device.
  • the transition from the first to the second standby state if the pressure exceeds a predetermined maximum value for longer than a predetermined minimum duration.
  • the liquid pump arrangement consumes no energy. If the liquid discharge member is opened again at a later time, the pressure of the liquid drops downstream of the check valve. This has the consequence that the connection between the power supply terminal and the control device is restored by the switching device and then the motor of the pump is switched on again by the control device. The liquid pump arrangement is then again in the active operating state.
  • the switching device has a first switching element and a second switching element, which are connected in parallel to each other in a voltage supply line, via which the control device is connected to the power supply terminal, wherein the first switching element independently of the control device in dependence on the downstream of the check valve prevailing pressure and / or flow state of the liquid is controllable and wherein the second switching element is controllable by the control device.
  • the control device can thus be provided via the first switching element and also via the second switching element, a supply voltage.
  • the control of the first switching element takes place independently of the control device as a function of the pressure and / or flow state of the liquid downstream of the check valve, whereas the control of the second switching element is effected by the control device.
  • control device for example, the possibility of interrupting the connection between the voltage supply connection and the control device by means of the second switching element in the presence of certain conditions, that is to say the control device can separate itself from the voltage supply connection by means of the second switching element.
  • a reconnection of the control device to the voltage supply connection can then take place with the aid of the first switching element, which is controlled in dependence on the pressure and / or flow state of the liquid downstream of the check valve.
  • the first switching element can be actuated, for example, in response to the pressure prevailing downstream of the check valve of the liquid, in order to proceed in the presence of a certain pressure value in a closed switching state and thereby to establish a connection between the power supply terminal and the control device.
  • the control device can thus be acted upon by the first switching element in the presence of a certain pressure value with supply voltage, and this in turn gives the control device the opportunity to electrically control the second switching element so that then the provision of the supply voltage via the second switching element takes place, and indeed when the first switching element returns to an open switching state.
  • the first switching element is designed as a pressure switch.
  • the first switching element is designed as a reed switch.
  • the second switching element is designed in an advantageous embodiment of the invention as an electrical switch and has a control input, which is connected to the control device. Via the control input, a control signal for opening and closing the switch can be made available to the switch by the control device.
  • control device has a timer for detecting the duration of voltage-free states of the control device. This gives the control device the possibility of detecting a frequent switching on and off of the control device as a fault. Such an error case may be present, for example, if the control device is disconnected from the power supply connection several times in quick succession.
  • voltage-free states can be detected by the control device up to a duration of at least 10 minutes.
  • a sequence of equally long stress-free states can be detected.
  • Such a series of conditions may occur, for example, when a fluid delivery device connected to the fluid pump assembly is leaking. If the user has closed off the liquid delivery device, a high pressure can initially be formed downstream of the check valve, as explained above, so that a transition into the second standby state takes place. If the liquid discharge member leaking, the pressure gradually decreases again and there is a transition to the active operating state. As a result, the pressure increases again and again a transition to the second standby state takes place. The leakage of the liquid delivery member thus results in a sequence of dead states of identical duration.
  • Embodiment of the invention are recognized by the control device as an error case, which then turns off the engine permanently. A restart of the engine is in this case preferably only when the user opens the liquid discharge member again.
  • the timer advantageously has at least one capacitor which can be discharged via a load resistor when the supply voltage ceases. If the controller is connected to the power supply terminal, the capacitor is charged. If the connection between the power supply terminal and the control device is disconnected, the supply voltage is eliminated and the capacitor discharges via the load resistor. The capacitor and the load resistor thus form an RC element having a characteristic time constant. If the supply voltage is again made available to the control device, the residual voltage applied to the capacitor can be measured by a measuring element of the control device, and from the residual voltage can be deduced by an evaluation element of the control device to the duration of the dead state. It is advantageous if periods of up to at least 10 minutes can be detected by means of the capacitor.
  • the control device may comprise a microelectronic circuit, preferably a microcontroller, into which a measuring element for detecting the residual voltage of the capacitor and an evaluation element for evaluating the residual voltage are integrated.
  • the sensor device has a first sensor element for providing a switch-on signal for switching on the motor and a second sensor element for providing a switch-off signal for switching off the motor.
  • the two sensor elements are sensitive to the magnetic field and cooperate with a permanent magnet which is movable in the flow channel as a function of the pressure and / or flow state of the liquid prevailing downstream of the check valve.
  • At least one sensor element is preferably designed as a Hall sensor.
  • the two sensor elements on each other non-overlapping detection areas for detecting the permanent magnet This gives the possibility to detect the permanent magnet in two different positions.
  • the time sequence of the sensor signals provided by the sensor elements can be determined, because this gives the possibility of determining the direction of movement of the permanent magnet in the flow channel.
  • the motor can be switched on and off.
  • the two sensor elements are arranged on the outside of the flow channel in the flow direction of the liquid at a distance from each other, and the switching device has a magnetic field-sensitive switching element which is arranged adjacent to the two sensor elements on the outside of the flow channel.
  • the permanent magnet moves in the flow channel depending on the pressure and / or flow state of the liquid.
  • the motor can be switched on and off by means of the two sensor elements, and the control device can be connected to the voltage supply connection by means of the magnetic-field-sensitive switching element.
  • the flow channel has a channel inlet and a channel outlet, between which a valve body is movably arranged in the flow channel for releasing and interrupting a flow connection between the channel inlet and the channel outlet, wherein the valve body in combination with a wall of the flow channel
  • the check valve is formed and the flow channel has a closing region and a release region, wherein the flow connection between the channel inlet and the channel outlet in a positioning of the valve body is interrupted within the closing region and released in a positioning of the valve body within the release region, wherein the valve body within the closing region in dependence from the pressure acting on the valve body of the liquid against the action of at least one return element is movable, and wherein the Ventilk body within the release region in response to the flow rate of the liquid flowing through the flow channel against the action of at least one return element is movable, and wherein the valve body of the sensor device in a first position for turning on the motor and in a second position to turn off the engine is detected and wherein the switching device has
  • a valve body of the liquid pump assembly can move within the flow channel in a closing area and a release area. Is the valve body in the
  • Closing area so he interrupts the flow connection between the channel inlet and the channel outlet.
  • the closing area may, for example, over a length of about one quarter to about three quarters of the
  • Total length of the flow channel extend.
  • the position which the valve body assumes within the closing region depends on the pressure acting on the valve body. This is the pressure of the liquid, which in interrupted flow communication between the Kanaleinlass and the channel outlet downstream of the valve body prevails. If the valve body is in the release area, it releases the flow connection between the channel inlet and the channel outlet.
  • the release area may extend, for example, over a length of about one quarter to about three quarters of the total length of the flow channel.
  • the position which the valve body assumes within the release region is dependent on the flow rate of the liquid flowing through the flow channel. At a low flow rate, the valve body occupies a position within the release area at a closer distance to the closing area, and at a high flow rate, the valve body within the release area occupies a position at a greater distance from the closing area.
  • the valve body can be detected in two positions. From the sensor device, a sensor signal can be provided which depends on the pressure acting on the valve body and on the flow rate of the fluid in the flow channel.
  • the valve body thus forms the check valve in combination with the wall of the flow channel and additionally has the function of a flow sensor and a pressure sensor.
  • the motor of the liquid pump assembly can be controlled in such a configuration in a simple manner by means of the valve body. If liquid is dispensed by the liquid pump arrangement via the liquid delivery member, the valve body is moved by the liquid flowing through the flow channel against the action of at least one restoring element within the release region into a release position spaced from the closing region.
  • the liquid discharge of the liquid pump arrangement is terminated by a user by closing the liquid delivery member, the flow of the liquid acting on the valve body is eliminated and the valve body moves into a rest position under the action of at least one return element.
  • the reaching of the rest position can be detected by the sensor device and then the motor of the liquid pump arrangement can be switched off.
  • the liquid pump assembly is then in a first standby state with low power consumption.
  • By switching off the Motors eliminates the conveying effect of the pump and the trapped between the valve body and the liquid delivery member and pressurized fluid moves the valve body from the rest position against the action of at least one return element in a closed position. Reaching the closed position can also be detected by the sensor device.
  • the sensor device then provides the control device with a corresponding sensor signal.
  • This sensor signal shows that the pressure of the fluid downstream of the valve body has exceeded a predetermined maximum value.
  • the control device can then interrupt the connection to the power supply connection, preferably after a predetermined minimum duration of the overrun, so that the liquid pump assembly then no longer consumes energy.
  • the fluid pump assembly is then in a second
  • the controller may, on the one hand, re-activate the motor of the pump so that the liquid pump assembly is again in the active mode, and, on the other hand, the controller may electronically maintain the connection to the power supply terminal. The delivery of liquid can thus be continued.
  • the position in which the valve body cooperates with the switching element of the switching device for providing the power supply of the control unit it may be, for example, the rest position, which is also detected by the sensor device.
  • the valve body is in such a configuration in the closed position not immovably on a rigid valve seat, but the valve body can be interrupted in interrupted flow communication between the channel Inlet and the channel outlet in response to the force acting on the valve body pressure within the closing range move.
  • This makes it possible to provide, by means of the sensor device, a control signal for disconnecting the connection between the voltage supply connection and the control device when the pressure acting on the valve body exceeds a maximum value.
  • the connection between the power supply terminal and the control means can be restored independently of the control means by means of the switching means and the motor can then be turned on again by the control means, and in the absence of the flow of liquid, the motor be turned off by the controller.
  • the valve body conveniently carries at least one permanent magnet.
  • the sensor elements of the sensor device can be sensitive to magnetic fields, so that they can detect the permanent magnet fixed to the valve body.
  • the flow channel is arranged upstream of a pumping chamber of the pump.
  • the flow channel may extend between a pump inlet of the liquid pump assembly and the pumping chamber of the pump.
  • valve body has a sealing element which slides on a movement of the valve body within the closing region along the channel wall.
  • the sealing element conveniently comprises a sealing lip.
  • the sealing element is designed as an O-ring.
  • the valve body is slidably held in the flow direction of the liquid.
  • the flow channel is designed in a straight line and the valve body is held linearly displaceable within the flow channel.
  • the closing region of the flow channel is designed cylindrically in an advantageous embodiment of the invention or it expands in the flow direction of the liquid.
  • a conical configuration of the closing area has proven to be advantageous.
  • a conical configuration of the closing area has the advantage that the pressing force acting on the sealing element within the closing area increases progressively the farther the valve body approaches the channel inlet. This leads to an increasing sealing effect. Such movement is performed by the valve body as the pressure of the liquid increases downstream of the valve body.
  • the cone angle of the closing area is preferably less than 5 °, in particular less than 1 °, for example 0.6 °.
  • the release area has a first partial area with a smaller diameter that adjoins the closing area and an adjoining second partial area with a larger diameter.
  • the flow rate of the liquid is advantageously not more than 60 liters per hour.
  • the flow rate of the fluid is advantageously more than 60 liters per hour.
  • the valve body is detectable in the first part of the sensor device. This gives the possibility to turn off the engine of the liquid pump assembly, if the valve body is longer than a predetermined time interval with the engine in the first sub-range, because a longer stay of the valve body in the first sub-range with the engine running and thus with active pump indicates a lack of flow around the valve body with liquid, in particular to a lack of liquid, so that there is a risk of damage to the pump.
  • the residence time of the valve body in the first portion is therefore detectable in an advantageous embodiment of the invention and when a predetermined maximum length of stay is exceeded when the engine is switched on, the engine can be conveniently switched off by the control device.
  • At least one return element is formed in a preferred embodiment of the invention as a return spring. With increasing distance, which assumes the valve body to a rest position, an increasing restoring force is exerted on the valve body by the return spring.
  • the valve body is movable within the closing area against the action of a first return element, which is preferably configured as a return spring, and the valve body is movable within the release area against the action of a second return element, which is preferably also formed as a return spring.
  • the liquid pump assembly on two return springs, wherein the valve body in a position upstream of a rest position by a first return spring and at a position downstream of the rest position of a second return spring with a restoring force is acted upon.
  • the valve body assumes the rest position when it is subject to neither a pressure load nor a load by the flowing liquid.
  • the valve body in the rest position favorably occupies a position immediately adjacent to the closing area within the release area.
  • Figure 1 a perspective view of a liquid pump assembly according to the invention
  • Figure 2 is a schematic partial longitudinal sectional view of a pump of the liquid pump assembly of Figure 1;
  • Figure 3 is a schematic sectional view of the pump taken along line 3-3
  • Figure 4 is a schematic sectional view corresponding to Figure 3, wherein the
  • Valve body assumes a rest position
  • Figure 5 a schematic sectional view corresponding to Figure 3, wherein the
  • Valve body assumes a closed position
  • FIG. 6 shows a block diagram of a control device of the liquid pump arrangement from FIG. 1.
  • FIG. 10 an advantageous embodiment of a liquid pump assembly according to the invention in the form of a garden pump is shown schematically schematically, which is generally occupied by the reference numeral 10.
  • the garden pump 10 comprises an outer housing 12, which from a first Housing half shell 14 and a second housing half shell 16 is formed.
  • the two housing half-shells 14, 16 receive between them a motor pump unit 18 with an electric motor 20 and a liquid pump 22 driven by the electric motor 20.
  • the garden pump 10 has a control device 24 and a main switch 26.
  • the liquid pump 22 has a pump housing 28 made of a plastic material, which surrounds a pumping chamber 30.
  • a pumping member in the form of an impeller 32 is rotatably mounted, which can be rotated by the electric motor 20 in rotation.
  • an outlet line 34 leads to a pump outlet 36.
  • An outlet line for example a garden hose, can be connected to the pump outlet in a conventional manner and therefore not shown in the drawing to achieve a better overview.
  • the output line carries at its free, the liquid pump 20 remote end usually a liquid discharge member, via which the liquid pumped by the liquid pump 22 can be discharged.
  • the liquid delivery member may be configured, for example, in the form of a faucet, a spray nozzle or a spray gun, and may be selectively opened and closed by the user to control liquid delivery.
  • the pump housing 28 Upstream of the pumping chamber 30, the pump housing 28 has a filling shaft 38 through which the pumping chamber 30 liquid can be supplied.
  • the filling shaft 38 has a filling opening 40 which can be closed by a screw cap 42.
  • an inlet connection 44 opens into the filling shaft 38.
  • the inlet connection 44 forms a pump inlet 46, to which a supply line, for example a suction hose, which is known to a person skilled in the art and therefore not shown in the drawing for better clarity, is connected can. Via the supply line can be supplied to the pump inlet 46 to be conveyed liquid.
  • a supply line for example a suction hose, which is known to a person skilled in the art and therefore not shown in the drawing for better clarity, is connected can. Via the supply line can be supplied to the pump inlet 46 to be conveyed liquid.
  • a channel body 52 Within the hopper 38, a channel body 52 is arranged, which defines a flow channel 54.
  • the flow channel 54 has a filling opening 40 facing the first channel section 56, which merges via a radially inwardly directed step 58 into a second channel section 60.
  • the second channel section 60 extends to a conical channel enlargement 61, to which a third channel section 62 adjoins, which extends to a shaft opening 64 of the filling shaft 38 facing away from the filling opening 40.
  • the first channel section 56 forms a channel inlet 66 facing the filler opening 40 and the third channel section 62 has two channel outlets 68, 70 on diametrically opposite sides.
  • the channel body 52 of the feed tube 38 forms a radially inwardly directed manhole constriction 72, to which the channel body 52 can be applied with the interposition of a sealing element.
  • the sealing element is formed in the illustrated embodiment as an O-ring 74.
  • the first channel section 56 has a radially outwardly directed support edge 76.
  • the first channel section 56 is surrounded in the circumferential direction by a first return spring 78, which is supported on the one hand on the support edge 76 and on the other hand on the shaft constriction 72.
  • the first return spring 78 forms a compression spring, which acts on the channel body 52 with a spring force, which is directed with respect to the longitudinal axis 80 of the filling shaft 38 axially upwards.
  • a guide member 82 is arranged, which is fixed to the step 58 and which has a aligned with the longitudinal axis 80 aligned passage 84.
  • the passage 84 forms a guide for a guide tappet 94 which is integrally connected to a valve body 86 movably arranged in the flow passage 54.
  • the valve body 86 is designed substantially bell-shaped and surrounded in the circumferential direction by a sealing element in the form of a sealing ring 90.
  • the sealing ring 90 has a sealing lip 92.
  • the valve body 86 in combination with the channel body 52, which provides the wall of the flow channel 54, a check valve.
  • the linear guide tappet 94 adjoins the valve body 86 in an integral manner, which engages through the passage 94 and, adjacent to its free end facing away from the closing body 88, carries a plate-shaped spring holder 96.
  • a second return spring 98 is clamped between the spring holder 96 and the guide member 82.
  • the second return spring 98 forms an actuator for positioning the valve body 86 in the flow channel 54.
  • the second return spring 98 surrounds the guide tappet 94 in the region between the spring holder 96 and the guide member 82nd
  • a third return spring 100 is clamped.
  • the third return spring 100 forms a further actuator for positioning the valve body 86 in the flow channel 54.
  • first channel portion 96 dives an end portion of a filter element 102, which extends from the step 58 to the screw cap 42 and is detachably connected to the channel body 52.
  • the filter element 102 is releasably connected via a bayonet connection 104 shown only roughly schematically in the drawing with the channel body 52.
  • bayonet connections 104 are known per se to those skilled in the art and, in the present case, would not require any detailed explanation.
  • the channel body 52 is acted upon by the filter element 102 with the action of the first return spring 78 opposing pressure force under the action of the channel body 52 with the interposition of the O-ring 74 rests tightly against the manhole constriction 72.
  • Liquid supplied to the liquid pump 22 via the pump inlet 46 thus, when the filling opening 40 is closed by means of the screw cap 42, the pump chamber 30 can only reach via the flow channel 54, but it can not flow around the channel body 52 when the filling opening 40 is closed.
  • the first return spring 78 raises the channel body 52 so far that it assumes a distance from the manhole throat 72 and liquid filled via the filling opening 40 into the filling shaft 38 the channel body 52 can flow around unhindered. This makes it possible to fill the pumping chamber 30 to start up the garden pump 10 via the filling opening 40 with liquid.
  • valve body 86 carries on the outside of a permanent magnet 106.
  • the permanent magnet 106, a sensor device 108 and a magnetic field sensitive switching element in the form of a reed switch 128 associated with the second channel portion 60 at a Outside 110 of the pump housing 28 are arranged.
  • the sensor device 108 comprises a first sensor element 112, which is arranged in the axial direction with respect to the longitudinal axis 80 at a distance from the step 58.
  • the sensor device 108 has a second sensor element 114, which faces away from the step 58 at an axial distance from the first sensor element 112.
  • the flow channel 54 forms the conical channel extension 61 in the transition region between the second channel section 60 and the third channel section 62.
  • the flow channel 54 Upstream of the channel extension 61, that is in the region between the channel extension 61 and the step 58, the flow channel 54 forms a closing region 118, and downstream of the channel extension 61, that is in the region between the channel extension 61 and the shaft bottom 64, the flow channel 54 forms a Release area 120 off. If the valve body 86 is located in the closing region 118, then it lies with the sealing lip 92 in a liquid-tight manner against the channel wall 122 of the valve body Flow channel 54 at. Upon movement of the valve body 86 within the closing area 118, the sealing lip 92 slides along the channel wall 122.
  • valve body 86 If the valve body 86 is located in the release area 120, it occupies a distance from the channel wall 122, in that an annular gap 124 is formed between the sealing lip 92 and the channel wall 122. Liquid may flow from the channel inlet 66 through the annular gap 124 to the channel outlets 68, 70 when the valve body 86 occupies a position within the release area 120. However, if the valve body 86 is in the closing area 118, the flow connection between the channel inlet 66 and the channel outlets 68, 70 is interrupted by the valve body 86.
  • the release area 120 is aligned coaxially with the closing area 118.
  • the flow channel 54 is configured conically in the closing area 118, wherein it widens with increasing distance from the channel inlet 66.
  • the sealing lip 92 within the closing region 118 when approaching the channel inlet 66, is subject to an increasing radially inwardly directed pressing force, the farther the valve body 86 moves in the direction facing away from the release region 120 - in FIGS up - moved.
  • the increasing pressing force increases the sealing effect of the sealing lip 92.
  • the release region 120 connects to a first portion 121 which extends to the edge of the channel outlets 68, 70.
  • the release region 120 forms a second subregion 123, which has a larger flow cross section than the first subregion 121 due to the channel outlets 68, 70.
  • the flow cross section thus changes abruptly during the transition from the first subregion 121 to the second subregion 123 ,
  • the two sensor elements 112 and 114 are in the form of magnetic field-sensitive sensors, in particular in the form of Hall sensors, designed be electrically connected via a sensor line 126 to the motor controller 24.
  • the valve body 86 is reciprocally movable within the flow passage 54 in response to the pressure and flow connections forming within the flow passage 54 in the axial direction. As already explained, it breaks the flow connection between the channel inlet 66 and the channel outlets 68, 70 when it is within the closing area 118 and releases the flow communication between the channel inlet 66 and the channel outlets 68, 70 as it moves within the Release area 120 is located.
  • valve body 86 assumes a closed position adjacent to the first sensor element 112, as shown in FIG. 5, then it is located in the detection area of the first sensor element 112 and is detected by it. In the closed position, the valve body 86 completely interrupts the flow connection between the channel inlet 66 and the channel outlets 68, 70.
  • valve body 86 assumes a rest position adjacent to the second sensor element 114, as shown in FIG. 4, then it is located in the detection area of the second sensor element 114 and is detected by it. In the rest position, the valve body 86 can be flowed around by the liquid at a flow rate of not more than 60 liters per minute. In the rest position, the valve body is located in the first subregion 121 of the release region 120.
  • the two sensor elements 112, 114 are arranged at such a distance from each other that their detection areas do not overlap.
  • valve body 86 If the valve body 86 is located in the second subregion 123 of the release region 120, ie in the region of the channel outlets 68, 70, it occupies a clear distance from the first sensor element 112 and the second sensor element 112. element 114 and can not be detected by the sensor elements 112 and 114. If neither a sensor signal is provided by the first sensor element 112 nor by the second sensor element 114, this indicates that the valve body 86 assumes a release position, as illustrated in FIG. The valve body 86 assumes this release position if the liquid pump 22 is switched on and liquid is dispensed from the liquid pump 22 via the pump outlet 36. In this case, the flow passage 54 is traversed by liquid, under the action of the valve body 86 is moved against the spring force of the second return spring 98 in the channel inlet 66 facing away from the direction.
  • the already mentioned reed switch 128 is arranged on the outside 110.
  • the reed switch 128 forms a first switching element of a switching device 130, which is shown schematically in Figure 6.
  • the switching device 130 has a second switching element in the form of an electrically controllable switch which is connected in parallel with the reed switch 128 in a first voltage supply line 134, via which the control device 24 is connected to a first voltage supply connection 136.
  • the electrically controllable switch is designed as a triac 132. In series with the reed switch 128 and the triac 132, the main switch 26 is arranged.
  • a second power supply terminal 138 is connected to the controller 24 via a second power supply line 140. Via the two voltage supply lines 134, 140 of the control device 24, an electrical supply voltage can be provided. The connection between the first voltage supply terminal 136 and the control device 24 can be made via the reed switch 128 and also via the triac 132.
  • the triac 132 has a control input 142, which is connected via a control line 144 to the control device 24.
  • the detection area of the reed switch 128 is virtually identical to the detection area of the first sensor element 112, the reed switch 128 being open when the valve body 86 with its permanent magnet 106 is in the detection area of the reed switch 128. If the valve body 86 with its permanent magnet 106 is outside the detection range of the reed switch 128, then the reed switch 128 is closed and thus an electrical connection between the first voltage supply connection 136 and the control device 24 is provided via the reed switch 128 irrespective of the switching state of the switching transistor 132.
  • valve body 86 with its permanent magnet 106 is located in the detection area of the reed switch 128, then the reed switch 128 is opened and a connection between the first voltage supply connection 136 and the control device 24 can only be made via the triac 132, provided that the latter receives a corresponding control signal from the control device 24 receives.
  • the control device 24 has a timer 146 with a capacitor 148 and with a load resistor 150, which is connected in parallel to the capacitor 148.
  • the capacitor 148 is charged as long as the control device 24 is supplied with supply voltage via the first voltage supply line 134 and the second voltage supply line 140. If the supply voltage is omitted by interrupting the electrical connection via the voltage supply line 134, the capacitor 148 discharges via the load resistor 150 at a predetermined time constant, which is determined by the capacitance of the capacitor 148 and the capacitor
  • Ohmic resistance of the load resistor 150 is specified. If a supply voltage is again provided after a de-energized state of the control device 24, the voltage still applied to the load resistor 150 can be detected by a measuring element of the control device 24 and the detected voltage makes it possible for the duration of the de-energized state with the aid of an evaluation element of the control device 24 determine.
  • the controller 24 follows several dead states with identical duration directly to each other, this can be detected by the controller 24 as an error case.
  • the valve body 86 under the action of the second return spring 98 and the third return spring 100 initially assumes its rest position outside the detection range of the reed switch 128, so that the reed switch 128 has its closed switching state. If the main switch 26 is subsequently actuated, then the electric motor 20 is switched on by the control device 24, wherein any signals of the sensor elements 112, 114 are initially ignored. After a short period of time, for example
  • the position of the valve body 86 is queried by the controller 24.
  • the liquid pump 22 is active and the valve body 86 is due to the liquid flowing around it in its release position and thus outside the detection ranges of the sensor elements 112, 114, as shown in Figure 3. If the valve body 86 is still in its rest position and thus in the detection range of the second sensor element 114 after this time has elapsed, this indicates a lack of flow, for example due to a fault, for example due to a lack of fluid that there is a risk of damage to the liquid pump 22. In this case, the electric motor 20 is turned off.
  • valve body 86 If the valve body 86 is outside the detection ranges of the two sensor elements 112, 114 at the end of the stated period, then it assumes its release position and the electric motor 20 remains in operation, so that liquid from the garden pump 10, for example via a garden hose and at the free end the garden hose connected liquid delivery device can be dispensed.
  • the liquid flow within the Flow channel 54 and the valve body 86 is moved by the second return spring 98 in the detection range of the second sensor element 114 and detected by this.
  • a short delay time which may be, for example, 5 seconds
  • the electric motor 20 is turned off due to the sensor signal provided by the second sensor element 114.
  • a fluid pressure builds up in the garden hose, which acts as an accumulator.
  • the fluid enclosed between the valve body 86 and the fluid delivery member presses the valve body 86 into the closed position shown in FIG. 5 and thus into the detection area of the first sensor element 112 and the reed switch 128.
  • the garden pump 10 is now in a first standby state with low power consumption.
  • the connection between the first voltage supply connection 136 and the control device 24 is interrupted by means of the triac 132, in that the Triac 132 goes into its open switching state due to a control signal of the control unit 24. Since the valve body 86 with its permanent magnet 106 is in this state in the detection area of the reed switch 128, the reed switch 128 is open and the additional opening of the triac 132 also has the result that the control device 24 is completely disconnected from the supply voltage. This eliminates any energy consumption of the garden pump 10 and the garden pump 10 is in a second standby state.
  • the transition from the first to the second standby state takes place before the expiration of a minimum period, as soon as the valve body 86 reaches its closed position.
  • the reaching of the predetermined closed position and thus the detection range of the first sensor element 112 takes place when the pressure of the liquid downstream of the valve body 86 has exceeded a predetermined maximum value. If at a later time the liquid discharge is released by the user by opening the liquid discharge member, the pressure falls downstream of the valve body 86 and under the action of the third return spring 100, the valve body 86 is moved out of the detection range of the reed switch 128 in the direction of the Release area 120.
  • the valve body 86 moves as outlined above out of the detection range of the first sensor element 112 towards the release area and the drop of the previously provided by the first sensor element 112 sensor signal causes the controller 24, the electric motor 20th turn on again, so that the liquid pump 22 is put into operation again and the valve body 86 is moved due to the liquid flowing around it in the release position shown in Figure 3.
  • valve body 86 briefly moves through the detection region of the second sensor element 114, so that it is briefly detected by the second sensor element 114 and the second sensor element Ment 114 provides a short-term, pulse-like sensor signal.
  • this short-term sensor signal has no change in the operation of the electric motor 20 result. Rather, the control device 24 detects from the time sequence of the sensor signals of the sensor elements 112, 114, the direction of movement of the valve body 86, which moves in the present case after switching on the liquid pump 22 properly in its release position.
  • the garden pump 10 is characterized by a reliable and extremely low-energy control option.
  • the control device 24 automatically disconnects from the power supply, so that the garden pump 10 is switched to a second standby mode. State goes over, in which it consumes no more energy. If this state is terminated by the user by opening the liquid delivery member, the control device 24 is automatically provided again with a supply voltage by the reed switch 128 closes, so that subsequently a transition to the active operating state can take place.
  • the switching on and off of the electric motor 20 and also the transition to the de-energized state of the control device 24 take place as a function of the upstream of the pumping chamber 30 in the flow channel 24 prevailing pressure and flow conditions of the liquid.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

La présente invention concerne un système de pompage de liquide (10) comportant un moteur (20) et une pompe (22) permettant de refouler un liquide, un clapet anti-retour agencé dans un canal d'écoulement (54) dans lequel peut s'écouler ledit liquide, un dispositif capteur (108) pour produire un signal de capteur en fonction de l'état d'écoulement et/ou de la pression du liquide en aval du clapet anti-retour, et un dispositif de commande (24) qui peut être alimenté en tension d'alimentation par une borne d'alimentation en tension (136), et qui peut être raccordé au dispositif capteur (108). Le moteur (20) peut être automatiquement mis en marche ou arrêté par le dispositif de commande (24) en fonction de l'état d'écoulement et/ou de la pression du liquide en aval du clapet anti-retour. Selon l'invention, afin de perfectionner le système de pompage de liquide de telle sorte qu'il ait une consommation d'énergie réduite à l'état de repos, le système de pompage de liquide (10) comporte un dispositif de commutation (130). Le dispositif de commande (24) peut être connecté à la borne d'alimentation en tension (136) et séparé de cette dernière à l'aide du dispositif de commutation (130) en fonction de l'état d'écoulement et/ou de la pression du liquide en aval du clapet anti-retour.
PCT/EP2013/066843 2013-08-12 2013-08-12 Système de pompage de liquide WO2015022010A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PCT/EP2013/066843 WO2015022010A1 (fr) 2013-08-12 2013-08-12 Système de pompage de liquide
EP13750296.9A EP3033529A1 (fr) 2013-08-12 2013-08-12 Système de pompage de liquide

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Application Number Priority Date Filing Date Title
PCT/EP2013/066843 WO2015022010A1 (fr) 2013-08-12 2013-08-12 Système de pompage de liquide

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WO2015022010A1 true WO2015022010A1 (fr) 2015-02-19

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0964157A1 (fr) * 1998-06-12 1999-12-15 Officine di Trevi di Fioretti Gino & C. - S.A.S Pompe de puits avec interrupteur à pression intégré
DE19923357A1 (de) 1998-10-07 2000-04-13 Gardena Kress & Kastner Gmbh Flüssigkeitspumpenanordnung, insbesondere für die Verwendung in Haus und/oder Garten
EP2202411A2 (fr) * 2008-12-23 2010-06-30 KSB Aktiengesellschaft Dispositif et procédé pour une installation transportant du liquide

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0964157A1 (fr) * 1998-06-12 1999-12-15 Officine di Trevi di Fioretti Gino & C. - S.A.S Pompe de puits avec interrupteur à pression intégré
DE19923357A1 (de) 1998-10-07 2000-04-13 Gardena Kress & Kastner Gmbh Flüssigkeitspumpenanordnung, insbesondere für die Verwendung in Haus und/oder Garten
EP2202411A2 (fr) * 2008-12-23 2010-06-30 KSB Aktiengesellschaft Dispositif et procédé pour une installation transportant du liquide

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