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WO2007018971A1 - Procede et dispositif ameliorant les caracteristiques de marche de systemes de nettoyage par aspiration pour piscine - Google Patents

Procede et dispositif ameliorant les caracteristiques de marche de systemes de nettoyage par aspiration pour piscine Download PDF

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Publication number
WO2007018971A1
WO2007018971A1 PCT/US2006/027495 US2006027495W WO2007018971A1 WO 2007018971 A1 WO2007018971 A1 WO 2007018971A1 US 2006027495 W US2006027495 W US 2006027495W WO 2007018971 A1 WO2007018971 A1 WO 2007018971A1
Authority
WO
WIPO (PCT)
Prior art keywords
pump
pressure
flow
pool
outlet
Prior art date
Application number
PCT/US2006/027495
Other languages
English (en)
Inventor
Melvyn L. Henkin
Jordan M Laby
Original Assignee
Henkin-Laby, Llc
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 Henkin-Laby, Llc filed Critical Henkin-Laby, Llc
Publication of WO2007018971A1 publication Critical patent/WO2007018971A1/fr
Priority to US12/009,775 priority Critical patent/US20080250581A1/en

Links

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
    • 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
    • E04H4/1672—Connections to the pool water circulation system
    • 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
    • E04H4/1618—Hand-held powered cleaners
    • E04H4/1636—Suction cleaners
    • E04H4/1645—Connections to the pool water circulation system

Definitions

  • TITLE METHOD AND APPARATUS FOR IMPROVING
  • This invention relates generally to a swimming pool cleaning system utilizing an electrically driven pump for powering (1) a pool water filtration system and (2) an automatic pool cleaner; and more particularly to system improvements for preventing pump cavitation and for increasing the negative operating pressure (i.e., suction) available for powering the pool cleaner.
  • Typical pool cleaning systems include an electrically driven pump which draws pool water into its suction inlet and discharges the water from its pressure outlet.
  • the pool water drawn into the pump inlet is most typically captured by a pool skimmer and/or drain.
  • the pool water discharged from the pump outlet is typically passed through a filter (and, optionally, a heater and/or chlorinater) prior to being returned to the pool.
  • a pump appropriately sized for the particular pool installation should produce a flow rate sufficient to recirculate or turnover all of the poo! water within a certain interval. For swimming pools, turnover rates of between eight and twelve hours are generally recommended.
  • the pump size required to achieve the desired turnover rate for a particular pool depends primarily on the pool's size (e.g., gallons) and the characteristics of the plumbing system, (e.g., pipe dimensions, fittings, filter, orifices, etc).
  • the pump must be sized to overcome the total flow resistance attributable to friction loss in the plumbing on both the suction and pressure sides of the pump. This total flow resistance is frequently referred to as “Total Dynamic Head” (TDH) and is typically expressed in "feet of water”.
  • TDH Total Dynamic Head
  • Many pump manufacturers provide performance data tables which indicate (for each pump size) the pump output (e.g., gallons per minute) as a function of Total Dynamic Head.
  • An exemplary performance data table is depicted below: TABLE I
  • a typical suction powered cleaner includes an inlet for drawing in water and debris, an outlet for discharging into a flexible suction hose coupled to the pump suction inlet, and a propulsion subsystem powered by the pump suction for propelling the cleaner along the wall surface.
  • Some type of flow control device e.g., one or more valves, is generally provided between the pump suction inlet and the respective outlets of the pool cleaner and skimmer/drain for selectively defining the respective operating modes, i.e., filtering mode and cleaning mode.
  • a first flow path coupling the skimmer/drain to the pump inlet will be fully open in the filtering mode and closed or only partially open in the cleaning mode.
  • a second flow path coupling the cleaner to the pump suction inlet will be fully open in the cleaning mode and open or closed during the filtering mode.
  • first and second flow paths can be controlled in a variety of ways either manually or automatically.
  • first and second valves can be respectively incorporated into the first and second flow paths and can be controlled manually or in response to a certain event such as the expiration of a timed interval or activation of the pump.
  • the flow paths can be manually controlled by a user physically decoupling one flow path and coupling the other flow path to a pipe leading to the pump suction inlet
  • pool cleaners are typically designed to be powered by a relatively low negative pressure supplied to the downstream end of the suction hose at the pool wall, More particularly, such pool cleaners are typically designed to be powered by a negative pressure of -12" Hg or less (1.0 inch mercury equals approximately 0.88 feet water) at the pool wall.
  • -12" Hg limitation is a consequence of (1) the allowable pressure drop between the pool wall and the pump suction inlet and (2) the recognition that, to avoid pump cavitation, it is advisable to maintain the pump inlet pressure less negative than -26" Hg.
  • the -26" Hg limitation at the pump inlet is based on the fact that water at a temperature of 100°F will vaporize when exposed to a vacuum of -28" Hg and an appropriate margin of safety (i.e., about 2" Hg) is prudent.
  • the present invention is directed to an automatic swimming pool cleaning system including a subsystem responsive to the magnitude of negative pressure at the pump suction inlet for controlling pump flow in order to prevent pump cavitation and/or create a constant high negative pressure at the pool wall for powering a pool cleaner.
  • Systems in accordance with the invention are configured to pump a high rated volume of water when operating in a filtering mode and to provide a high negative pressure at the pool wall for powering the pool cleaner when operating in a cleaning mode. More particularly, embodiments of the invention are configured to provide a pressure at the pool wall more negative than -12" Hg for powering a pool cleaner. This increase in higher performance cleaners.
  • the pump flow is varied as a function of the magnitude of negative pressure at the pump inlet for the purpose of avoiding cavitation.
  • the pump flow can be controlled in a variety of ways including mechanical, hydraulic, pneumatic, and electrical.
  • the pump can be back pressured by reducing openings at or downstream from the pump outlet to increase output flow resistance and thus avoid cavitation by reducing the flow producing capability of the pump.
  • pump flow producing capability can be reduced by, for example, decreasing electric drive power to the pump motor and/or electrically and/or mechanically loading the pump to reduce pump speed.
  • a first subsystem in accordance with the invention for preventing cavitation includes a pressure sensor for monitoring the negative pressure at, or just upstream from, the pump suction inlet. If the monitored pressured is more negative than a lower setpoint S L (e.g., -25"Hg), the pump flow producing capability is reduced by closing a throttling valve downstream from the pump outlet to prevent the inlet pressure from falling to a level which could cause cavitation. If the monitored pressure is less negative (i.e., more positive) than an upper setpoint Su (e.g., -24" Hg) 1 the pump flow producing capability is increased by opening the downstream throttling valve.
  • a pressure sensor for monitoring the negative pressure at, or just upstream from, the pump suction inlet.
  • the subsystem operates in the cleaning mode to maintain the minimum pump inlet pressure at about -25" Hg 1 thus preventing cavitation.
  • the setpoints SL and Su can be set when the pump is manufactured or can be user adjustable to optimize the system for a particular pool installation, Typically, the setpoints will be adjusted when a system is initially installed and once setup, will generally not require further adjustment.
  • the first embodiment can be implemented by using a conventional pump and locating the pressure sensor at the pump suction inlet with the flow controller (or valve device) located in the pressure side plumbing at or downstream from the pump pressure outlet.
  • the pump can be manufactured with the pressure sensor and flow controller actually installed in the pump housing adjacent to the inlet and outlet, respectively.
  • a second subsystem in accordance with the invention includes a pressure sensor configured to monitor the negative pressure at the pool wall, e.g. , at a port between a fixed pipe and the dov/nstream end of a flexible suction hose coupled to the cleaner.
  • a pressure sensor configured to monitor the negative pressure at the pool wall, e.g. , at a port between a fixed pipe and the dov/nstream end of a flexible suction hose coupled to the cleaner.
  • the system is configured to maintain a substantially constant high negative pressure (i.e. more negative than -12" Hg) at the wall port during the cleaning mode for powering a higher performance pool cleanerwhile preventing cavitation.
  • a lower setpoint S L could be set to -20" Hg and an upper setpoint Su to -19" Hg.
  • a pressure sensor is physically located proximate to the wall port and configured to enable a user to manually adjust and establish the setpoints.
  • the pressure sensor monitors the pressure at the port and communicates to a flow controller whether the measured pressure is more negative than the lower setpoint S L or less negative than the upper setpoint Su.
  • This communication can be by electrical means, e.g., hardwire orwireless, e.g., RF, or by hydraulic, pneumatic or mechanical means.
  • the flow controller is configured to respond to the pressure sensor command to modify the pump's flow producing capability, e.g., by modifying the flow resistance of the pressure side plumbing or by electrically or mechanically varying the pumping capacity of the pump.
  • Figure 1 diagramically depicts a prior art pool cleaning system including a pump for drawing in pool water from a skimmer and returning the water to the pool via a filter, the system further including a traveling pool cleaner powered by pump suction;
  • Figure 2 is a block/flow diagram of the prior art system of Figure 1 ;
  • Figure 3 depicts performance curves for an exemplary pool cleaner and exemplary 3/4 and 2.0 HP pumps operating in accordance with a typical prior art system as shown in Figure 2 and a system in accordance with the invention as shown in Figures 4A and 5;
  • Figure 4A is a diagram similar to Figure 2 but modified to show improvements in accordance with the invention for preventing pump cavitation;
  • Figure 4B is a schematic diagram showing a pressure sensor and valve for controlling pump back pressure;
  • Figure 5 is a diagram similar to Figure 4A configured to establish and maintain a desired negative pressure at the downstream end of the cleaner suction hose.
  • Figure 1 diagramatically depicts an exemplary conventional system for cleaning the water in pool 20 (i.e., filtering mode) as well as cleaning the surface of wall 22 (including bottom and side portions) containing the pool (i.e., cleaning mode).
  • Water cleaning i.e., filtering
  • the pump pressure outlet 32 returns the water to the pool via a filter 34, and optionally a heater 36 and/or chlorinater via pressure side plumbing 38 to one or more return outlets 40.
  • Wall cleaning is primarily achieved by operating an automatic traveling pool cleaner 44 which is coupled via a flexible suction hose 46 and plumbing 28 to the pump suction inlet 30.
  • the suction i.e., negative pressure, provided by the pump 24 to the cleaner 44, powers the cleaner primarily to (1) propel it along the surface of wall 22 and (2) pull pool water from adjacent the wall surface 22 for passage along with water borne debris, via suction hose 46 and plumbing 28 to pump suction inlet 30.
  • the pool water drawn from the skimmer 26, as well as the pool water drawn from cleaner 44 through suction hose 46 and standpipe 47, passes through an accessible skimmer basket 50 for trapping large debris prior to it reaching the pump 24.
  • the typical system shown in Figure 1 includes a valve 52, mounted in shimmer vacuum plate 53, which operates alternately in a pool water filtering mode and a cleaning mode.
  • valve 52 In the filtering mode, valve 52 is fully open so that the pump maximum rated flow can be pulled from the skimmer/drain for passage through the filter. In the cleaning mode, valve 52 is typically partially open to an adjustable setpoint so that pool water can be pulled from the cleaner 44 to operate the cleaner.
  • the valve 52 can be controlled manually and/or automatically to operate in the cleaning mode for a certain interval, e.g., 3-4 hours per day. A longer interval, e.g., 8-12 hours per day is typically required in the filtering mode to draw all of the pool water from the skimmer/drain for passage through filter 34.
  • a master timer (not shown) is generally provided to define these respective cleaning and filtering intervals.
  • Figure 2 depicts a conventional pump 100 having a suction inlet 102 arid a pressure outlet 104.
  • the pump 100 is comprised of an electrically driven motor and an impeller which is configured so that when rotated, it is capable of drawing water into the inlet 102 and discharging water at the outlet 104.
  • the outlet 104 is coupled through pressure side plumbing 106 typically including return line 108 extending to return outlets 110, preferably adjustable "eye-ball" flow director(s) mounted on the pool wall, for returning water to the pool.
  • the pressure side plumbing 106 includes a filter 112 and, optionally, equipment such as a heater 114, a chlorinater, etc.
  • Figure 2 also depicts a skimmer 120 having a pool water inlet 124 and a pool water outlet 126.
  • Typical prior art pool cleaning systems also include a drain 128 defining a pool water inlet 130 and outlet 132.
  • junction 136 upstream from the pump suction inlet 102.
  • Figure 2 depicts the junction 136.as being coupled to inlet port 138 of valve V1 140 (corresponding to aforementioned valve 52) whose outlet port 142 is coupled via pipe length 144 to the pump suction inlet 102.
  • Figure 2 also depicts a traveling pool cleaner 146 having a pool water inlet 148 and outlet 150.
  • the outlet 150 is coupled to the upstream end 151 of a flexible suction hose 152.
  • the hose downstream end 153 is typically coupled to a suction side plumbing port 154 (e.g., the inlet to standpipe 47 in Figure 1) located proximate to the pool wall 156.
  • Figure 2 depicts the port 154 as being coupled through a valve V2 158 and pipe or conduit 144 to the pump inlet 102.
  • valves (V1 , V2) 142 and 158 depicted in the exemplary prior art system of Figure 2 are not intended to necessarily represent identifiable hardware valves. Rather, the depicted valves 142 and 158 are intended to broadly represent any functional means for affecting flow between (1 ) the junction 136 and pump inlet102 and (2) the hose end 153 and pump inlet 102. Whereas some prior art systems may actually use conventional manual or timer controlled valves, other systems may rely upon a user physically coupling or decoupling respective openings, e.g., the hose end 153 and port 154.
  • Figure 2 is intended to functionally represent how the flows are controlled for operation in respective filtering and cleaning modes.
  • the flows are controlled to move pool water at a maximum rate through pump 100 and filter 112.
  • the flows are controlled to apply adequate suction to hose end ' 153 for powering the cleaner 146.
  • the flow control chart shown in Figure 2 depicts the functioning of the depicted valves V1 , V2 when operating in the filtering and cleaning modes.
  • valve V1 is fully open for carrying the maximum rated flow to the pump and filter.
  • V2 can be open or closed.
  • valve V2 is fully open and V1 is typically at a setpoint for supplying adequate additional pool water flow to pump 100 to avoid cavitation.
  • Typical swimming pool installations employ a pump sized to fully recirculate the pool water in about 8-12 hours.
  • the pump size selected for any particular pool installation is determined primarily by the pool's capacity and the total friction loss attributable to both the suction side plumbing, i.e., upstream from suction inlet 102, and the pressure side plumbing, i.e., downstream from pressure outlet 104. This total resistance is generally referred to as total dynamic head and is typically measured in feet of water.
  • a proper pump size can be selected for a particular pool installation by knowing the total dynamic head and the pool capacity. Based on these input quantities, a desired flow rate in gallons per minute can be determined. This flow rate for a particular head determines the pump size which should be selected.
  • the exemplary performance data Table I set forth above shows, for example, that to achieve a 47 gallon per minute flow rate with a 40 foot head, a 3/4 HP pump should be selected.
  • the table depicts flow rates for pumps sized from Vz HP to 2.5 HP which represents the typical range of pump sizes used in normal residential swimming pool installations.
  • Various suction powered pool cleaner constructions are commercially available and described in the literature. In order to be compatible with a full range of pool pump sizes, these known pool cleaners have typically been designed to be powered by a relatively small negative pressure, e.g., -12" Hg or less, available at the downstream end 153 of hose 152, i.e., at the pool wall.
  • the cleaner performance curve 160 fails to intersect either pump performance curve 162, 164 demonstrates the conventional need in the cleaning mode to provide additional pool water flow from the skimmer/drain to satisfy the pump flow requirements to prevent cavitation.
  • the horizontal distance AB represents the additional pool water flow required from the skimmer/drain to prevent cavitation when the cleaner is operating with the 3/4 HP pump.
  • the distance AC represents the additional pool water flow required when the cleaner is operating with the 2 HP pump
  • the pump flow capability is modified to effectively shift the pump performance curves (i.e., 162 or 164) to the left, i.e., curve position 166, relative to the cleaner curve 160, as depicted in Figure 3.
  • This action reduces or eliminates the need to pull additional water from the skimmer/drain during the cleaning mode and permits a more negative wall port pressure to be attained without causing cavitation.
  • the cleaner curve 160 intersects the modified pump curve 166 at a wall port pressure of approximately -20" Hg meaning that no additional pool water need be supplied from the skimmer/drain to satisfy the pump flow requirement.
  • the present invention is primarily directed to modifications of the plumbing configuration represented in Figure 2 for the purposes of preventing pump cavitation and increasing the magnitude of negative pressure available at the wall port for powering the pool cleaner 146.
  • Figure 4A shows a first subsystem embodiment indicating how the system of Figure 2 can be modified, either at the pump manufacturing stage or by modifying the suction side and pressure side plumbing of a pool installation, for avoiding pump cavitation.
  • Figure 5 shows a second exemplary subsystem embodiment for establishing and maintaining a pressure more negative than -12" Hg at the wall port for powering the cleaner and avoiding cavitation during the cleaning mode.
  • a pressure sensor 200 is provided for sensing the negative pressure at the pump suction inlet 102 (which should be understood to include sites upstream therefrom).
  • the pressure sensor 200 defines an adjustable setpoint S (or preferably a setpoint range defined by an upper setpoint Su and lower setpoint Su).
  • the pressure sensor responds to a sensed pressure more negative than S L or less negative than Su to provide a command signal to flow controller 202.
  • the flow controller 202 functions to modify the flow requirements of pump 100 for the purpose of maintaining the pump inlet pressure at a level to avoid cavitation, i.e., at about -25" Hg.
  • the flow controller 202 can be implemented in a variety of ways (e.g., electronic, hydraulic, pneumatic, mechanical) for controlling the pump flow requirements.
  • flow controller 202 can control, via link 206, a variable throttling valve V3 210 located at the pressure outlet 104 (which should be understood to include sites downstream therefrom).
  • the controller 202 can vary the pumping capacity of pump 100 by controlling pump motor speed via motor control circuit 212 or by mechanical loading, e.g., via a brake (not shown).
  • communication between the pressure sensor 200, flow controller 202, and throttling valve V3210 can also be implemented in a variety of ways, e.g., by a hydraulic, pneumatic, or mechanical link or electrically via hardwire or wirelessly.
  • FIG. 4B illustrates an exemplary embodiment of pressure sensor 200 in conjunction with flow controller 202 and throttling valve 210 of Figure 4A.
  • the pressure sensor 200 is comprised of an extendible cylindrical wall or bellows 220 closed by upper and lower plates 221 , 222 to define an interior chamber 224.
  • Chamber 224 opens via port 226 in plate 222 and port 227 in pump inlet pipe 228 to the pressure at pump inlet 102.
  • Plate 222 carries a rod 230 extending through an opening 231 in fixed plate 232.
  • the upper end of rod 230 is threaded at 233 and threadedly coupled to an adjustable nut 234.
  • a coil spring 235 is accommodated between nut 234 and fixed plate 232. The spring 235 acts against nut 234 to urge the rod 230 upwardly (as viewed in Figure 4B) to expand the chamber 224.
  • a relative decrease in pump inlet pressure acts to pull plate 221 down against the tension of spring 235 which is determined by the adjustable position of nut 234.
  • Rod 230 carries a switch actuator 236 which cooperates with normally open motor switches 238, 239. The switches are mounted such that actuator 236 closes switch 238 when rod 230 moves to the upper end of its range and closes switch
  • Switch 238 is connected to valve motor 240 to rotate valve V3 toward a fully open position when switch 238 is closed.
  • Figure 4B depicts switch 238 as being connected in series with an electric power source 242 and a normally closed limit switch 243 to a drive terminal 244 of valve motor 240. Energization of terminal 244 rotates valve V3 toward an open position. When valve V3 reaches its fully open position, limit switch 243 opens to deenergize motor 240.
  • Switch 239 is similarly connected to valve motor 240 to rotate valve V3 toward a closed position when switch 239 is closed.
  • Switch 239 is connected in series with power source 242 and a normally closed limit switch 245 to drive terminal 245 of valve motor 240.
  • limit switch 245 is opened to deenergize motor 240.
  • valve V3 can be rotated within a range from fully open to closed as determined by the pressure sensed at port 227 proximate to the pump inlet 102.
  • the sensed pressure establishes the dynamic position of plate 222 and switch actuator
  • FIG. 5 depicts alternative modifications to Figure 2 for the purpose of controlling the pump flow requirements when operating in the cleaning mode in order to maintain an increased negative pressure , i.e., more negative than -12" Hg at the pool wall port 153 for operating the suction cleaner 146.
  • adjustable pressure sensor 300 is initially adjusted to set the wall port pressure at a desired level, e.g., -20" Hg.
  • the sensor 300 which can be similar to sensor 200 depicted in Figure 4B, functions to generate a command to flow controller 302 for controlling throttling valve 310 and/or motor control circuit 312.
  • Communication can be accomplished by any suitable means such as a pneumatic, hydraulic, or mechanical link, or via a wired or wireless electrical connection.
  • valve 310 and/or control circuit 312 By controlling the action of valve 310 and/or control circuit 312, the pump curve, e.g., 162 or 164, in Figure 3 is shifted left to curve position 166, thus enabling the system to operate in the cleaning mode without requiring significant additional water flow from the skimmer/drain for preventing cavitation.
  • a significant pressure drop between the wall port 353 and the pump inlet 102 is avoided and a higher constant pressure more negative than -12" Hg, e.g.,- 20" Hg is available at the wall port for powering cleaner 146.
  • the availability of a higher negative pressure enables higher performance cleaners to be used.
  • the senor 300 and flow controller 302 will function to maintain the desired pressure at the wall port despite the occurrence of events such as a partial occlusion in the pressure side plumbing, e.g., the filter becoming dirty. Such an event can be viewed as merely shifting left the clean filter pump curves depicted in Figure 3.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
  • Control Of Positive-Displacement Pumps (AREA)

Abstract

Système de nettoyage pour piscine avec dispositif réagissant à l'importance de la pression négative sur le côté aspiration de la pompe et régulant en conséquence le flux de la pompe à eau pour protéger cette dernière contre la cavitation. Les systèmes de l'invention se caractérisent par le débit élevé de la pompe à eau en mode filtration et par une forte pression négative de l'appareil en mode de nettoyage.
PCT/US2006/027495 2005-08-02 2006-07-13 Procede et dispositif ameliorant les caracteristiques de marche de systemes de nettoyage par aspiration pour piscine WO2007018971A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US12/009,775 US20080250581A1 (en) 2005-08-02 2008-01-22 Method and apparatus for improving the performance of suction powered pool cleaning systems

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US70508005P 2005-08-02 2005-08-02
US60/705,080 2005-08-02

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US12/009,775 Continuation US20080250581A1 (en) 2005-08-02 2008-01-22 Method and apparatus for improving the performance of suction powered pool cleaning systems

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Publication Number Publication Date
WO2007018971A1 true WO2007018971A1 (fr) 2007-02-15

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WO2014064301A1 (fr) * 2012-10-26 2014-05-01 Metalast, S.A.U. Procédé de gestion d'eau dans une piscine

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FR2954381B1 (fr) * 2009-12-22 2013-05-31 Zodiac Pool Care Europe Appareil nettoyeur de surface immergee muni d'un dispositif accelerometrique detectant l'acceleration gravitationnelle
EP2972902B1 (fr) 2013-03-15 2019-10-02 Hayward Industries, Inc. Système modulaire de commande de piscine/spa
FR3019573B1 (fr) * 2014-04-04 2016-03-25 Zodiac Pool Care Europe Robot nettoyeur de piscine a puissance de pompage reglable
US10167651B2 (en) 2014-09-08 2019-01-01 Clint Jackson Pool water filtration system
US11720085B2 (en) 2016-01-22 2023-08-08 Hayward Industries, Inc. Systems and methods for providing network connectivity and remote monitoring, optimization, and control of pool/spa equipment
US20170212532A1 (en) 2016-01-22 2017-07-27 Hayward Industries, Inc. Systems and Methods for Providing Network Connectivity and Remote Monitoring, Optimization, and Control of Pool/Spa Equipment

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WO2014064301A1 (fr) * 2012-10-26 2014-05-01 Metalast, S.A.U. Procédé de gestion d'eau dans une piscine

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