EP3408471A1 - Swimming pool cleaning robot and method for using same - Google Patents
Swimming pool cleaning robot and method for using sameInfo
- Publication number
- EP3408471A1 EP3408471A1 EP17706557.0A EP17706557A EP3408471A1 EP 3408471 A1 EP3408471 A1 EP 3408471A1 EP 17706557 A EP17706557 A EP 17706557A EP 3408471 A1 EP3408471 A1 EP 3408471A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cleaning robot
- robot
- pressure
- cleaning
- pressure sensor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 162
- 230000009182 swimming Effects 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 35
- 239000007788 liquid Substances 0.000 claims abstract description 36
- 238000007654 immersion Methods 0.000 claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 72
- 238000013459 approach Methods 0.000 claims description 8
- 238000005259 measurement Methods 0.000 claims description 8
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000009194 climbing Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 230000003247 decreasing effect Effects 0.000 claims description 2
- 238000007747 plating Methods 0.000 description 10
- 238000001914 filtration Methods 0.000 description 6
- 239000012530 fluid Substances 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000005096 rolling process Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 230000001680 brushing effect Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 210000004907 gland Anatomy 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000011859 microparticle Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H4/00—Swimming or splash baths or pools
- E04H4/14—Parts, details or accessories not otherwise provided for
- E04H4/16—Parts, details or accessories not otherwise provided for specially adapted for cleaning
- E04H4/1654—Self-propelled cleaners
Definitions
- the present invention relates to the field of swimming pool equipment. It relates more particularly to a swimming pool cleaning device capable of moving along inclined walls. Preamble and prior art
- the invention relates to a device for cleaning a surface immersed in a liquid, such as a surface formed by the walls of a pool, in particular a swimming pool.
- a mobile pool cleaning robot Such a cleaning robot carries out said cleaning by traversing the bottom and walls of the pool of the pool, brushing these walls, and sucking the debris to a filter.
- Debris means all the particles present in the basin, such as pieces of leaves, micro-algae, etc., these debris being normally deposited at the bottom of the basin or glued on the side walls thereof.
- the robot is powered by an electrical cable connecting the robot to an outdoor control unit and power supply.
- patents FR 2 925 557 and 2 925 551 of the applicant, which are directed to a submerged surface cleaner device with removable filter device.
- Such devices generally comprise a body, drive members of said body on the immersed surface, a filtration chamber formed within the body and comprising a liquid inlet, a liquid outlet, a hydraulic circuit for circulating liquid between the body. input and output through a filter device.
- Patent FR 2 954 380 of the same applicant, is still known, which is directed at a pool cleaning robot equipped with an accelerometer making it possible to determine changes of attitude within the pool.
- These devices have automatic programs for cleaning the bottom of the basin and possibly the side walls of the basin.
- Such a program determines a cleaning of the pool in a predetermined time, for example an hour and a half.
- the maintenance of the robot in line of water is usually carried out using the balance between the buoyancy and the weight of the robot when it is at the level of the water line.
- the cleaners are balanced by the addition of float or ballast to float at the water line, allowing to clean the water line by following naturally.
- the robot is removed from the water by the user at the end of the cycle or at regular intervals to be cleaned, when the filter is too full of particles (leaves, microparticles etc.).
- the filter fills with particles generating an additional mass or even a plugging of the filter.
- the robot whose filter is closed, may have difficulties to climb along the walls and reach the water line. Indeed, the robot has on the one hand a larger mass related to the filling of the filter.
- the clogging of the filter causes a reduction of the plating forces or axial thrust of the robot towards the surface .
- the invention therefore aims to solve some of these problems.
- the invention aims in particular a swimming pool cleaning device whose behavior along a vertical wall is improved, and allowing a uniform cleaning of the pool.
- a main objective of the invention is to propose a swimming pool cleaning robot technique that can reach the water line of a pool reliably, in any circumstances, and more particularly regardless of the circumstances. the adhesion of the robot to the surface of a vertical wall of the basin and whatever the filling of the filter.
- the setting of a cleaning robot is usually done for a clean filter and a grip on the average pond wall.
- Another main objective of the invention is to propose a swimming pool cleaning robot technique that can perform a homogeneous pool cleaning, and more particularly cleaning at a constant immersion depth.
- the invention aims in a first aspect a pool cleaning robot comprising:
- At least one liquid circulation hydraulic circuit between at least one liquid inlet and at least one liquid outlet, said hydraulic circuit comprising at least one means for separating the debris suspended in the liquid,
- a “pool cleaning robot” is a device for cleaning a submerged surface, that is to say, typically a device, mobile within or at the bottom of a swimming pool, and adapted to carry out the filtration debris deposited along a wall.
- Such an apparatus is commonly known as a pool cleaning robot, when it comprises means of automated management of movements at the bottom and on the walls of the pool to cover the entire surface to be cleaned.
- liquid Abbreviated as “liquid”, the term “liquid” is used to describe the mixture of water and debris suspended in the pool or in the fluid circulation circuit within the cleaning apparatus.
- the driving and guiding means comprise means for plating the robot on the surface. These plating means can be for example linked to the pumping means creating a depression between the robot and the surface traveled by the robot. It should be emphasized that the driving, guiding and plating means can be controlled independently.
- control means comprise a pressure sensor for determining the depth of immersion of the cleaning robot in a pool of a pool, from the measurement of the ambient pressure of the robot.
- the robot has a way to know the pressure at which it is immersed.
- the pressure sensor can be attached to the robot or connected by a flexible hose to the robot.
- the pressure sensor can be independently inside the body of the robot or outside of it.
- the electronic component can be protected from water by being housed inside a sealed housing or coated with resin. It can also be a waterproof sensor integrating the electronics inside the body of the sensor.
- a state of the robot can be defined from the pressure detected by the robot.
- the state of the robot can be for example one of the following states:
- the pressure sensor allows guidance of the robot at a constant depth for example to clean the pool water line.
- control means also comprise means for controlling the pressure detected by the pressure sensor at a set value.
- the pressure control means compare the measured value of the pressure with a value, commonly called the setpoint, set manually or preferably automatically by the control means.
- the instruction allows in particular to indicate a depth of immersion to which the cleaning robot must move for a predetermined period. From the difference between the measured value and the setpoint, the servocontrol means modify at least one of the parameters of the driving and guiding means in order to guide the robot towards the desired immersion depth.
- the servo means can for example be made using a PID control system (acronym for Proportional-Integral-Derivative).
- PID control system an analog for Proportional-Integral-Derivative
- Other servo-control means such as a P (Proportional) or PI (Proportional - Integral) control system can be used because the required accuracy and the rates of variation of the pressure are low.
- the pressure sensor is an absolute pressure sensor.
- the pressure sensor is a relative pressure sensor measuring the pressure difference with respect to a pressure of a sealed chamber serving as a reference.
- the sealed enclosure may be a housing comprising a pressure equal to atmospheric pressure, a bar or vacuum.
- the sealed chamber may also correspond to the engine block of the robot, the engine block corresponding to a sealed chamber in which is housed one of the cleaning robot motors.
- the pressure sensor is a piezoelectric sensor.
- the pressure sensor delivers an electrical signal depending on the pressure exerted on a piezoelectric material.
- the pressure sensor is a piezoresistive sensor.
- the pressure sensor is a strain gauge attached to a wall subjected to ambient pressure.
- control means comprise means for recording the time spent at at least one determined immersion depth of said cleaning robot.
- the robot can be guided to a landing where the robot has spent less time cleaning.
- control means are connected to an inclinometer secured to the body of the robot.
- control means evaluate the information provided by the pressure sensor and the inclinometer, and adjust more finely the operating parameters of the drive and guiding means of the cleaning robot.
- inclinometer can be an accelerometer.
- the pressure sensor is located in a median plane of the body of the robot, said plane being perpendicular to the usual axis of displacement.
- the pressure sensor being located in the middle of the cleaning robot between the front face and the rear face of the robot, can detect the water line or the approach of the water line in the same way whatever the forward or backward movement of the robot.
- the pressure sensor is housed, at least in part, inside the rigid sealed housing comprising a flexible membrane, the pressure sensor measuring the pressure inside said sealed housing.
- the waterproof case can be a case attached to the body of the cleaning robot or be the sealed block containing the robot motors.
- the pressure sensor measures a pressure proportional to the ambient pressure of the robot.
- said electronic card can be advantageously housed inside the waterproof case. It should be emphasized that the body of the sensor can pass through a sealed wall of said sealed housing.
- the pressure sensor is housed, at least in part, inside a rigid sealed housing traversed by a capillary tube having an end inside the housing, said pressure sensor being connected in a sealed manner at said end of the capillary tube, measuring the pressure at said end of the capillary tube, the sealed housing being secured to the body of the robot.
- an electronic card associated with the pressure sensor can also be placed inside the waterproof case.
- the sealed housing is made of a plastic material having low thermal conduction.
- the temperature inside the housing is substantially constant, equal to the water temperature of the basin.
- the sealed housing comprises a Faraday cage.
- the electronic components located inside the housing are not subject to the magnetic field induced by the coils of an electric motor included in the plating means and the driving and guiding means of the robot.
- the invention also relates to a method for controlling a pool cleaning robot, said robot comprising:
- control means for controlling the operating parameters of the drive and guiding means of said cleaning robot, the control means comprising a pressure sensor making it possible to determine the depth of immersion of the cleaning robot in a basin of a swimming pool , from the measurement of the ambient pressure of the robot,
- Such a method comprises a step in which the ambient pressure of the robot is compared with a value called set pressure and a step of controlling the operating parameters of the driving and guiding means in order to reduce the difference between the ambient pressure and the set pressure.
- the method comprises a step of adjusting the operating parameters of the drive and guiding means as a function of the pressure detected by the pressure sensor.
- the method comprises a step in which the control means guide the cleaning robot to a constant immersion depth by controlling the pressure detected by the pressure sensor to a value of setpoint.
- the method comprises a step in which the control means are calibrated during the first climb along a wall of the pool to be cleaned, by adjusting the operating parameters of the means. drive and guidance to drive the robot to reach the water line with certainty.
- the method comprises a step in which the control means determine the atmospheric pressure as the minimum pressure recorded during the first rise.
- the method comprises a step in which the control means record the atmospheric pressure before the immersion of the robot in the pool.
- the method comprises the following steps:
- the control means detects the rise of the cleaning robot along a wall
- control means adjust the operating parameters of the drive and guiding means of the cleaning robot, to allow climbing along the wall; the control means detect the approach of the water line at a distance D from the water line, when the pressure detected by the pressure sensor is equal to the sum of the atmospheric pressure and the pressure of the water column of height D;
- control means adjust the operating parameters of the drive and guiding means of the cleaning robot, gradually decreasing the power of the drive means and guiding, so that the cleaning robot reaches the water line with a low vertical speed, substantially equal to zero.
- the method comprises a step in which the cleaning robot follows the water line being guided by a set pressure substantially equal to the atmospheric pressure.
- the method comprises a step in which the control means modify the atmospheric pressure setpoint if the cleaning robot sucks air when the robot cleans the water line.
- the method comprises a step in which, after detecting that the cleaning robot hardly reaches the water line, or even is unable to reach it despite the adjustment of the operating parameters of the driving and guiding and / or guiding means, an indication is displayed on a user interface indicating that the filter must be cleaned.
- the method comprises a step of recording the cleaning time spent by the cleaning robot in at least a given depth range.
- a depth range is the depth value in the range centered around a given depth value.
- the method comprises a step in which the control means comprise at least one cleaning instruction in time to pass for the cleaning of a given depth range.
- the method comprises a step in which the control means comprise at least one relative cleaning instruction comparing the time spent between at least two given depth ranges.
- the invention also relates to an immersed surface cleaning apparatus characterized in combination by all or some of the characteristics mentioned above or below.
- FIG. 1 illustrates a perspective view of a pool cleaning robot implementing a filtration system as described
- FIG. 2 illustrates a sectional view of the same apparatus along a longitudinal vertical plane
- FIG. 3a illustrates a method for controlling the same apparatus in the form of a block diagram
- FIG. 3b illustrates a recording curve as a function of time of the pressure measured by the pressure sensor of the same apparatus
- FIG. 4a illustrates a front view of an alternative embodiment of the same apparatus
- FIG. 4b illustrates a perspective view of a sealed housing housing the pressure sensor of this variant embodiment of the same apparatus.
- the invention finds its place in a swimming pool technical environment, for example a family-type buried pool.
- a submerged surface cleaner includes, in the present non-limiting embodiment, a cleaning unit, further referred to as a pool cleaning robot, a power supply unit and a control unit of said pool cleaning robot.
- the cleaning unit is shown according to an embodiment given here by way of example, in FIGS. 1 and 2.
- the pool cleaning robot 10 comprises a body 11 and a driving and guiding device comprising driving and guiding members 12 of the body on a submerged surface.
- these driving and guiding members consist of wheels or tracks arranged laterally to the body (see Figure 1).
- the pool cleaning robot 10 further comprises a motor driving said driving and guiding members, said motor being fed, in the present embodiment, via an on-board card.
- a reference point X r Y r Z r relating to this cleaning robot 10 is defined, in which:
- a longitudinal axis X r is defined as the axis of movement of the cleaning robot 10 when the displacement wheels 12 are controlled to move identically
- a transverse axis Y r is defined as perpendicular to the longitudinal axis X r , and situated in a plane parallel to the plane of support of the displacement wheels 12 of the cleaning robot 10, this lateral axis Y r being thus parallel to the axis of rotation of the wheels,
- a vertical axis Z r is defined as perpendicular to the two other axes, the bottom of the robot along this vertical axis Z r being situated between said robot and the wall traversed, and the top of the robot along this axis being the part of the robot most away from the surface traveled.
- the notions of front, back, left, right, up, down, up, down, etc. on the cleaning robot are defined relative to this coordinate X r Y r Z r -
- the drive and guide members defining a guide plane on a submerged surface by their points of contact with said underwater surface.
- Said guide plane parallel to the plane formed by the longitudinal and transverse axes, is generally substantially tangential to the immersed surface at the point where the device is located.
- Said guide plane is for example substantially horizontal when the device moves on a submerged surface of the pool bottom.
- the pool cleaning robot 10 comprises a hydraulic circuit comprising at least one liquid inlet 13 and a liquid outlet 14.
- the liquid inlet 13 is, in the present nonlimiting example, located at the base of the body 1 1 ( in other words under this, when the pool cleaning robot 10 is placed in its normal operating position at the bottom of the pool), that is to say immediately facing a submerged surface on which the pool cleaning robot 10 moves in order to suck debris accumulated on said submerged surface.
- the liquid outlet 14 is on the top of the pool cleaning robot 10. In the present embodiment, the liquid outlet 14 is in a direction substantially perpendicular to the guide plane, that is to say vertically if the pool cleaning robot 10 rests on the bottom of the pool, and horizontally if the cleaning appliance is going through a vertical wall of the pool.
- the hydraulic circuit connects the liquid inlet 13 to the liquid outlet 14.
- the hydraulic circuit is adapted to ensure a flow of liquid from the liquid inlet 13 to the liquid outlet 14.
- the pool cleaning robot 10 comprises for this purpose a pump comprising a motor 19 and a propeller 20 disposed in the hydraulic circuit.
- the motor 19 drives the propeller 20 in rotation.
- This pump causes, on the one hand, a suction of water at the water inlet 13 located under the cleaning robot 10, so closer to the surface against which the cleaning robot 10 evolves, and, on the other hand, a water outlet through the water outlet 14, which is substantially perpendicular to the support plane of the cleaning robot 10 and thus to the traveled surface.
- the apparatus comprises a filtration chamber 15 interposed on the hydraulic circuit between the liquid inlet 13 and the liquid outlet 14.
- the filtration chamber 15 separating and storing the debris suspended in the liquid, comprises a filter basket 16 and a cover 17 forming the upper wall of the filtration chamber 15.
- the filter basket 16 is extractable, that is to say it can be extracted from and introduced into the body 1 1 of the cleaning robot 10.
- the body 1 1 of the cleaning robot 10 has for this purpose a housing in which the filter basket 16 can be mounted.
- the fact that the filter basket 16 is extractable makes it easy to empty, especially without having to handle the robot 10 in its entirety.
- the pool cleaning robot 10 is supplied with energy by means of a sealed flexible cable.
- this flexible cable is attached to the body of the pool cleaning robot 10 at its upper part.
- This flexible cable is connected at its other end to the power supply unit (not shown in FIG. 1), disposed outside the basin, this power unit being itself connected to the electric current on the sector.
- the pool cleaning robot 10 further comprises here a gripping handle 18 adapted to allow a user to take the robot out of the water, especially when cleaning the filter.
- the operating parameters of the cleaning robot 10, such as, for example, the type of cleaning cycle requested by the user, are set via a user interface located on the power unit.
- a cleaning robot frequently has two cleaning cycles.
- a first cycle the robot travels, the bottom of the pool, and cleans it, without climbing along the side walls.
- second cycle the robot travels both the bottom of the pool and rises along the side walls, so as to take off the debris that is stuck to it, or that concentrate at the water line.
- the robot climbs along the side wall, emerges partially to rub the water line with its brush, tilts to move laterally along the wall, and plunges back by reversing its direction to go down to the bottom while still cleaning the wall.
- control unit (not shown in FIG. 1) of the robot 10, housed in a sealed housing near the motors, adjusts the operating parameters of the drive motor of the displacement members and the fluid circulation pump, thus acting on the plating forces exerted on the robot towards the surface that it is running.
- the cleaning robot 10 comprises a pressure sensor 21 fixed to the body 11 of the cleaning robot 10.
- the pressure sensor is connected to the robot by a flexible hose.
- the flexible hose can be attached to the robot body.
- the piezoresistive type pressure sensor 21 enables the control unit of the robot 10 to determine the depth of immersion in the basin from the measurement of the absolute pressure to which the cleaning robot 10 is subjected.
- the control unit of the robot 10 comprises pressure control means for guiding the robot 10 to a pressure corresponding to a set value, hereinafter referred to as the set pressure.
- the pressure control means are in the present non-limiting example of the invention made using a PID controller.
- the set pressure varies over time to guide the cleaning of the robot 10 in the pool.
- the set pressure can also be constant over a time range to guide the robot 10 to a given depth.
- the pressure sensor may be a piezoelectric sensor, comprising for example a strain gauge. It can also be any other type of measuring sensor indicating the depth at which the cleaning robot is located, such as a float in a capillary tube.
- the pressure sensor 21 comprises in this example a sealed body in which is inserted the sensor electronics.
- the sensor electronics may be protected by resin or be included in a sealed housing.
- the pressure sensor 21 is advantageously housed outside the hydraulic fluid circulation circuit because the pumps cause a vacuum inside the hydraulic circuit relative to the local pressure.
- the value of this depression being a function of the instantaneous power of the pumps, varies over time.
- control unit adjusts the power of the drive and / or pump motors to increase the robot's capacity. to reach the water line.
- control unit deduces the speed of ascent or descent of the pressure variations detected by the pressure sensor 21.
- the control unit then automatically adjusts the speed of the drive members, depending on the conditions of adhesion of the robot on the wall.
- control unit can detect via the pressure sensor 21 when the robot is close to the water line during climbing phases along a wall of the basin.
- the pressure sensor 21 is advantageously fixed in the middle of the cleaning robot 10 in the usual direction of the movement of the robot 10, close to one of the displacement and guiding members 12. This middle position of the pressure sensor 21 thus enables the control unit to detect the water line when the pressure measured corresponds to the atmospheric pressure plus the pressure corresponding to the half length of the cleaning robot 10. It should be emphasized that this detection of the water line is performed in the usual or reverse direction of the cleaning robot 10.
- the pressure sensor 21 is housed in the center of the front face of the robot, thus enabling the control device for driving and guiding means to detect the line of water when the pressure is significantly higher than the atmospheric pressure.
- the pressure sensor 21 may be disposed at any other location of the robot, preferably but not exclusively in the robot.
- the control unit of the robot 10 is calibrated during the first climb along a wall of the pool to be cleaned. For this purpose, the control unit adjusts the operating parameters of the drive and plating motors driving the robot 10 to reach the water line with certainty.
- the control unit determines the atmospheric pressure as the minimum of the pressure recorded during this first climb.
- the control unit also confirms that the atmospheric pressure is substantially constant each time the cleaning robot reaches the water line.
- control unit records the atmospheric pressure before the immersion of the robot in the pool.
- the use of the pressure sensor 21 also allows the control unit to modify the parameters of the engines during the ascent of the cleaning robot 21 along a pool wall of a pool.
- control unit of the cleaning robot 21 follows the control method 300 illustrated in FIG. 3a in the form of a block diagram.
- a first step 310 the control unit detects the rise of the cleaning robot along a wall. This ascent results in a continuous decrease in the pressure detected by the pressure sensor 21. It should be emphasized that the measurement of the pressure can be smoothed so as not to take into account the minute variations brought by the noise of the sensor.
- control unit adjusts the operating parameters of the driving and cleaving motors of the cleaning robot 10, during step 320, so as to allow the ascent along the wall.
- the control unit detects in step 330, the approach of the water line. This detection can be carried out for example at a distance of about fifty centimeters from the water line. This distance is detected when the pressure detected by the pressure sensor 21 is equal to the sum of the atmospheric pressure P atm and the pressure P EC of the water column from a height of fifty centimeters.
- P C E is equal to fifty millibars or fifty hectoPascal.
- control unit then gradually decreases the operating power of the drive and plating motors during step 340, so that the cleaning robot 10 reaches the water line with a low vertical speed, substantially equal to zero.
- the robot 10 can then follow the water line while being guided at a pressure substantially equal to the atmospheric pressure.
- the value of the setpoint pressure may be equal to the atmospheric pressure or to a value substantially greater than the atmospheric pressure in order to allow the robot 10 to follow the water line while still being immersed.
- the use of the pressure sensor 21 also allows the control unit to change the atmospheric pressure setpoint if the cleaning robot 10 draws in air when the robot is cleaning the water line.
- the cleaning robot 10 has a surplus of mass caused by the collection of many debris, the robot hardly reaches the water line, or even is unable to reach it despite the adjustment of the operating parameters of the engines. An indication is then displayed on the user interface indicating that the filter needs to be cleaned.
- the set pressure allowing the robot to reach the water line is recorded.
- the robot 10 can also be advantageously guided to a constant immersion depth by controlling the pressure detected by the pressure sensor 21 to a set point greater than the atmospheric pressure.
- the robot 10 can thus for example clean the pool water line or perform cleaning along any depth of the basin.
- the control of the pressure is generally performed by first comparing the ambient pressure of the robot with the current set pressure.
- the operating parameters of the drive and guide means are then adjusted to reduce the difference between the ambient pressure and the set pressure.
- control unit also records the time spent at each depth. Generally the recording is done for depth ranges.
- a depth range represents a depth interval centered around a value of the set pressure. The control unit can thus adapt the time the robot has spent cleaning a particular depth, for example to clean the pool water line.
- the curve 30 shown in FIG. 3b illustrates an example of recording as a function of time of the ambient pressure at the robot immersed in a pool of a swimming pool.
- the basin is divided into two areas: a shallow area and a deeper area corresponding to a dipping pit. Three pressure levels are visible on the curve 30.
- the strongest pressure 31 corresponds to the bottom of the dive pit.
- the pressure 32 corresponding to the intermediate bearing is linked to the bottom of the shallow zone.
- the lowest pressure 33 substantially equal to the atmospheric pressure, reflects the cleaning of the water line of the basin.
- the robot 10 begins here by cleaning the bottom of the pit to be dipped, translated by a bearing 34 of pressure 31. The robot then climbs back into the shallow area and cleans the bottom of that area. The curve 30 thus has a bearing 35 of intermediate pressure 32. The robot then rises along a wall of the basin to clean the water line. A new bearing 36 corresponding to the lowest pressure 33 reflects the cleaning of the water line. The robot then descends to the shallow area. The robot thus cleans the different areas of the pool.
- the control unit of the cleaning robot 10 records the past times to clean the bottom of each area of the basin.
- the control unit compares the time spent in this zone with that recorded in the shallow zone. If the time spent in the dive pit is greater than a previously determined threshold time, the robot 10 reverses its direction of travel and returns to the shallow area to continue cleaning this area. This reversal of the direction of movement is illustrated on the curve 30 by the peak 37.
- a threshold duration is determined in each cleaning zone. This threshold can be determined in absolute or relative to a duration of another area to be cleaned. These threshold times are determined in order to homogenize the cleaning of the swimming pool basin. These threshold times may be a function of the surface area of the surfaces to be cleaned.
- the recording of the time spent at each depth also allows a homogeneous cleaning of stairs and beaches included in a pool pool.
- the Pressure sensor 21 advantageously measures the pressure inside a rigid sealed housing.
- Figures 4a and 4b illustrate an embodiment of one of these variants.
- the sealed housing 41 comprising a pressure sensor 21 is secured to a blank of the body 1 1 of the cleaning robot 10, as shown in Figure 4a.
- the sealed casing 41 illustrated in greater detail in FIG. 4b, is made of a rigid plastic material and comprises a flexible membrane 42.
- the pressure sensor 21 is located on an electronic card 43 fixed inside the casing waterproof 41.
- the electronic card 43 is connected to the control unit of the robot 10 by a cable 44 passing through the sealed housing 41 via a gland 45.
- the watertight cable 44 transmits a signal proportional to the ambient pressure at which the cleaning robot 10 evolves.
- the flexible membrane 42 is made in the present example of flexible PVC. Its thickness is substantially less than one millimeter.
- the membrane can also be made of flexible polyurethane or coated fabric.
- the housing 41 also thermally isolates the pressure sensor 21 motors and other energy dissipating components.
- the pressure sensor 21 thus has a substantially constant temperature, corresponding to the temperature of the water. The measurements obtained by the pressure sensor 21 are then reliable and reproducible.
- the sealed housing 41 also magnetically isolates compass-type magnetosensitive components, or electronic components, inserted in the housing 41.
- the sealed housing 41 may comprise a Faraday cage.
- the pressure sensor is housed in part inside a rigid sealed housing secured to the body of the robot.
- the sealed housing is traversed by a capillary tube whose one end is connected in leaktight manner to the pressure sensor.
- the pressure sensor is a relative pressure sensor measuring the pressure relative to a pressure of a sealed chamber serving as a reference.
- the sealed enclosure may be a housing comprising a pressure equal to atmospheric pressure, a bar or vacuum.
- the sealed enclosure may also correspond to the engine block of the robot, the engine block being a sealed enclosure in which is housed the drive motor of the moving members of the cleaning robot. It should be emphasized, however, that the temperature of the engine block changes over time. So it is necessary to correct this reference pressure in order to take into account the pressure variations related to temperature variations in a constant volume.
- the cleaning robot 10 also comprises means for determining at any time its attitude in the pool.
- the cleaning robot 10 comprises for example at least one known type of inclinometer, or a type of "tilt" vertical passage detection means or other equivalent device known to those skilled in the art.
- This inclinometer which can be an accelerometer, makes it possible to determine the orientation of the cleaning robot along three axes.
- the control unit can then process the information coming from the means for determining the orientation of the robot 10 in the pool, associating them with the immersion depth measured by the pressure sensor 21.
- the control unit can more accurately and finely adjust the operating parameters of the cleaning robot's drive and clutch motors.
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Manipulator (AREA)
- Cleaning By Liquid Or Steam (AREA)
- Cleaning In General (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR1650744A FR3047261B1 (en) | 2016-01-29 | 2016-01-29 | POOL CLEANER ROBOT AND METHOD OF USING SUCH A ROBOT |
PCT/FR2017/050133 WO2017129884A1 (en) | 2016-01-29 | 2017-01-23 | Swimming pool cleaning robot and method for using same |
Publications (2)
Publication Number | Publication Date |
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EP3408471A1 true EP3408471A1 (en) | 2018-12-05 |
EP3408471B1 EP3408471B1 (en) | 2020-03-04 |
Family
ID=55590063
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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EP17706557.0A Active EP3408471B1 (en) | 2016-01-29 | 2017-01-23 | Swimming pool cleaning robot and method for using same |
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US (1) | US10316534B2 (en) |
EP (1) | EP3408471B1 (en) |
AU (1) | AU2017212758B2 (en) |
ES (1) | ES2784526T3 (en) |
FR (1) | FR3047261B1 (en) |
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WO2018204479A1 (en) | 2017-05-05 | 2018-11-08 | Hayward Industries, Inc. | Automatic pool cleaner traction correction |
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2016
- 2016-01-29 FR FR1650744A patent/FR3047261B1/en active Active
-
2017
- 2017-01-23 US US16/073,269 patent/US10316534B2/en active Active
- 2017-01-23 WO PCT/FR2017/050133 patent/WO2017129884A1/en active Application Filing
- 2017-01-23 EP EP17706557.0A patent/EP3408471B1/en active Active
- 2017-01-23 ES ES17706557T patent/ES2784526T3/en active Active
- 2017-01-23 AU AU2017212758A patent/AU2017212758B2/en active Active
Cited By (2)
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WO2018204479A1 (en) | 2017-05-05 | 2018-11-08 | Hayward Industries, Inc. | Automatic pool cleaner traction correction |
EP3619589A4 (en) * | 2017-05-05 | 2021-01-20 | Hayward Industries, Inc. | Automatic pool cleaner traction correction |
Also Published As
Publication number | Publication date |
---|---|
ES2784526T3 (en) | 2020-09-28 |
FR3047261B1 (en) | 2020-06-12 |
FR3047261A1 (en) | 2017-08-04 |
AU2017212758B2 (en) | 2021-07-08 |
AU2017212758A1 (en) | 2018-08-16 |
US20190040642A1 (en) | 2019-02-07 |
US10316534B2 (en) | 2019-06-11 |
EP3408471B1 (en) | 2020-03-04 |
WO2017129884A1 (en) | 2017-08-03 |
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