Title of Invention: Vacuum cleaner to remove sediment and impurities from the bottom of huge water structures.

Technical Field

[0001] The present invention discloses a machine for removing impurities and debris settled in the bottom of aquatic areas and facilities such as huge artificial lakes and large reservoirs. More particularly, it relates to an electric cleaning machine manufactured completely of a waterproof material and powered by a small rechargeable battery of six-hour capacity. It is characterized with a design comprising a plurality of parts and sheets assembled together in such innovative way that imparts it with the flexibility and resilience needed to go through wrinkled surfaces commonly found in the plastic lining at the bottom of such structures. Its movement is controllable by at least two engines, each of which mounted onto its right and left sides. This guarantees a high level of suction of accumulated debris and dirt, meanwhile saving time, effort and cost.

[0002] The present invention is directed to a cleaning machine with high daily cleaning capacity and easily adjustable movement. These are two basic requirements for huge lagoons cleaning machines. It is well-known that cleaning capacity for any machine is dependent on its size (surface area) and speed of its movement. However, the speed is so restrained by the suction power. As such, small-sized machine is of a limited cleaning power regardless of its speed. For a bigger and easy-to-move machine, it is a must that the suction and filter media must be disposed of and placed outside the device as external components.

[0003] As to the innovative design of the present invention, it is an electric cleaning machine powered by Lithium battery of at least 24 Voltage in small size placed in the power supply box. It includes at least two electric engines for driving a set of movement conveyors in the right and left directions. It guarantees highly efficient performance and speed. The cleaning machine has no suction device of its own since the suction pumps thereof are available in the machines room. It also uses the filters of the lagoon. This makes the said machine of small size comparing to other machines alike.

Background Art

[0004] Aquatic facilities of various sizes are normally subject to massive quantities of contaminates and debris settled in the bottom, thus necessitating the purification of these huge waterbodies from such settlements. The bottom of such facilities is usually covered with water-impermeable plastic liners. Wherein the current conventional cleaning machines have no capacity to clean the bottoms of these facilities owing to the fact that:

- The surfaces of the bottom of such water structures are huge while the cleaning capacity of these devices is so limited. This makes the process very time consuming;

- To be fed with the required power, such machines are connected with electrical cables that, with the colossal aquatic facility, have to be so long up to every and each point in the bottom, thus impacting the operating power and maneuvering ability of the machine;

- The bottom of the lagoons has wrinkled surfaces and corrugations from being lined with water-impermeable plastic sheets, obstructing the function of machines not designed to deal with these surfaces;

- The use of self-cleaning strainer-dependent machines - Typically, the self-strainers are of small sizes to be fit into the machine - cannot deal with sediments of huge amounts down the gigantic lagoons.

[0005] It is normal that sediments in large amounts will settle down these water facilities as a result of large-sized particulates of debris collected into or falling onto the waterbodies, conducive to its settlement at the bottom under the burden of its weight. Adding chemicals (sintering matters) is to cause microparticles suspended in the water body to collect in form of a large mass and fall down to the bottom. Ignoring this issue of debris and sediments may lead to tremendous problems for the water body and cause the work of the structure - such as swimming pool, lagoon, or tank - to be obstructed.

[0006] The Technical references belonging to the related art have discussed different techniques for cleaning the bottom surface of huge water structures. A patent application No. US1056779 filed by John M. Davison in US Patent and Trade Marks Office on November 26 ^th , 1912 the first device for cleaning swimming pools, titled “A Cleaning Apparatus for Swimming Pools and the Like”. The document disclosed an apparatus for cleaning the bottom surface of a swimming pool comprising a scraper and sucker head that is connected to a sucking pipe being, in turn, connected to a pump placed outside the water facility. This apparatus is designed to suck up sediments from the bottom in such a primitive manner. Since then devices and apparatus for cleaning swimming pools and aquatic facilities have been developed into various forms and techniques. [0007] Many types of suction devices for cleaning underwater surface bottoms are commercially available. They are grouped into three main types in terms of operation method and source of energy used: Suction-side cleaner, Pressure-side cleaner and Robotic cleaners. These devices are based on the following techniques;

[0008] a) Suction-side Cleaner:

[0009] It is considered the cheapest and most used option for cleaning the swimming pools. Its operation is only based on the main pump of the swimming pool. It uses a filtering system for a pool clearing dirts and sediments from water. It is an appropriate solution for swimming pools with low rates of sediments and contaminates.

[0010] Such type of pool cleaners uses the pool pumps to generate a suction powerforwater loaded with debris to be pumped through a skimmer or drainage points. The filtered water is to be re-pumped via water recycling nozzles. It is the most affordable and commonest type of cleaners. Typically, devices of this type are attached to 1.5 inch hose.

[0011] b) Pressure-side Cleaner

[0012] For the suction of sediments, pressure-side cleaner is dependent on the main pool pump. However, it uses water in its flow from the pump to the pool under pressure. That is why it is called pressure-side cleaner. Upon directing pressurized water across the cleaner, it drives the wheels and produces suction power vacuuming all debris and sediments. This type of cleaners includes filtration bags of its own, thus less consuming the pool filter.

[0013] C) Electric Robotic Cleaner:

[0014] These devices of such type work independently from the pool pumping system and main filters. It is driven by a separate source of electricity. It includes two internal engines: one for vacuuming water into a self-contained filtering bag and driving filtered water back to the pool, and the other engine is attached with rubber movement conveyors similar to a tractor and provided with scrubbing brushes fixed via plastic or rubber strips onto metal pole. The said brushes, in the shape of painting rolls, are located in the front and rear parts of the machine. Whereby, contaminated particles are scrubbed out from the pool floor and walls according to the size and formation and pushed into the internal filter bag.

[0015] As to technical specifications of these devices, we will hold comparison of the apparatus: ENDURO XL40, as an example for the largest and most complicated and expensive apparatus. As shown in the table (1 ), its specifications are further demonstrated.

[0016] Evidently, these devices are not commensurate with huge lagoons and large tanks due to their small size and thus limited cleaning capacity. Thus, the currently available devices are not fulfilling the intended purpose. There is a need to provide an apparatus of high efficacy, power and speed together being time and effort saving.

[0017] The Egyptian patent NO. EG26151 , dated 28-03-2013, discloses a suction device for cleaning the bottom surface of huge lagoons, comprising a housing accommodating the external structural frame, suction assembly fluidly connected with the pumping system, cylinder wheels coupled with a movement means, wherein a suction device is in motion via a driving means. The suction device comprises further suction pipes and a brush for scrubbing settled debris under water surface. Given that the driving means is a buoyant, (i.e. a boat.) It is not auto-driven, but rather pulled away via a boat in the lagoon. It is further disclosed that the cleaning capacity of the suction device is 0.69 m ² /sec, cc. 59,000 m ² /day.

[0018] Egyptian patent No. EG29013, dated on 29-10-2018, also disclosed details of suction cleaner via sucking a large amount of water mixed with settled debris in the huge water body bottom, comprising a structural frame made of resilient material and an abundant number of brushes: first, median and lateral ones. The brush heads are of V shape, in a way that enable the apparatus to work back and forth with cleaning capacity 30,000 m ² /day. The suction cleaner is connected with external filtering system. It is supported with a good number of plastic stabilizer wheels along its outer perimeter for purpose of protection, especially against the wearing of lined insulated bed of the lagoon. These wheels are in higher level than that of brushes (as shown in Figure 2). The said apparatus is equipped with external driving device (boat).

[0019] Based on the above two documents, it is well clear that the state-of-art technique did not introduce a solution of high efficacy for cleaning solid sediments in the water facility bottoms, especially, for cleaning the bottom covered with impermeable plastic liner with existing of the wrinkles and corrugations. Accordingly, the previous art documents are not qualified for cleaning such type of bottoms, let alone it has a set of defects and limitations of use undermining its performance as follows: it requires external driving force (boat or vessel), thus increasing operation costs and consuming much time and making the apparatus hard to maneuver with;

Brushes are fixed, hence lacking flexibility needed for adjusting their vertical movement according to the bottom shape; The whole weight of the apparatus lies upon the lower brushes, while the wheels are on a higher level than that of brushes, that will definitely cause a rapid damage for the sets of brushes as illustrated in Figure 2.

Hence, the present invention endeavors to address the aforesaid limitations and deficiencies, whereas all references, including patents, patent applications or conventional methods recited herein are incorporated by reference in their entirety. With no admission whatsoever that any reference constitutes a part of the industrial technology of the present invention, they are void of any disclosure tackling the novel technology of the present invention.

Summary of Invention

[0001] The present invention relates to an electric cleaner powered by a rechargeable Lithium battery for vacuuming debris and sediments from huge water structures bottoms lined by impermeable plastic sheets, comprising a main body and at least three secondary bodies of rustproof sheets connected together via free-movement joints, and at least two studs bolted into the main body for longitude reinforcement of the machine, in addition to a set of brushes mounted onto respective carriers of the secondary bodies, and two sets of movement conveyors at both sides of the main body driving the movement of brushes while fixing a carrier for electric engine in the body of conveyors. The said cleaner further includes sensors against collisions and is provided with a programmed electron remote control for setting the speed and suction rate of the cleaner upon use.

Technical Problem

[0001] The main problem in the related art of this invention lies in the difficulty, high costs and time/effort consumption for cleaning huge lagoons and big-scaled tanks, especially with unleveled bottoms or ones with lined plastic insulating sheets which form wrinkles and corrugations in such liners, thus hindering the cleaning processes. These machines based on auto-filters of small sized so they can fittingly be accommodating inside. Such filters cannot deal with massive amount of sediments. Wherein big-scaled machines with no filters are still of slow movement while cleaning. Most of which are not self-moving. Yet, they are pulled away via floating boat inside the lagoon or tank.

Solution to Problem

[0001] Based on the foregoing, it is important to devise auto-moving apparatus for sucking debris and sediments out from huge water structures and large water bodies with no difficulty to use with the common unleveled bottom of water facility, ability to monitor the apparatus performance underwater and being time/effort-effective in the cleaning. This can be realized in a design of an electric vacuum cleaner powered by a rechargeable Lithium battery for vacuuming debris and sediments from huge water facility bottoms lined by water-impermeable plastic sheets.

Advantageous Effects of Invention

[0002] The said Vacuum cleaner is advantageously characterized with features fulfilling its intended aims and high work efficacy while overcoming the issue regarding the difficulty to clean unleveled bottoms of aquatic facilities. Wherein the present invention is so inventive and unobvious over conventional machines and devices used from the same intended purpose in the field. The said vacuum cleaner is characterized with:

That it is totally manufactured from waterproof materials, main and secondary bodies, studs and suction tubes of stainless,

That it is of auto-movement empowered by electric energy supplied by a small lithium battery placed in the power supply box and rechargeable every 6 hours of work. It is provided with at least two batteries, a main one and a backup,

That it is remotely controlled by a programmed electronic remote control for setting the machine speed depending on the amount of settled contaminates and debris, thus saving the time required for cleaning. The said remote control includes a display and a set of buttons for easy demonstration of instructions and selection of operation programs set for the vacuum cleaner by the users. Thus, it is easily operated and maneuvered.

That the said apparatus is provided with underwater camera filming while the apparatus is on motion, capturing surfaces to be cleaned. Thus, the said camera has many advantages, namely: a) To make sure that the parts over which the said Vacuum cleaner pass are well cleaned. In case of improper cleaning of some area, the Vacuum cleaner can go back to such area via a remote control. b) To avoid the Vacuum cleaner be passed over some stumbling blocks like huge logs which place can be located and manually removed. c) The said camera monitor the status of lined impermeable plastic bed for the lagoon bottoms so as to discover and locate any damaged part thereof. - The said vacuum cleaner is provided with front sensors preventing collision against vertical walls. Being on a distance of least 1 .25 m from a wall (this distance can be defined in the machine’s’ settings according to a user’s need) the Vacuum cleaner is halted and have instructions to turn right or left via the remote control.

- The device is provided with a set of brushes designed with adequate resilience to deal with wrinkles and folds usually found in the lined plastic bed of the bottom. Wherein each brush is divided into segments, thus making each part or segment move separately from other brush segments up and down direction according the shape of bottom to be cleaned.

- The said vacuum cleaner is provided with a mount carrying the brushes for easy replacement of worn brushes with new ones.

The said vacuum cleaner is provided with insulated powerful engines, wherein it is characterized by a wide range of cleaning capacity depending on the engine speed from 11.000 to 149.000 m ² /day.

Brief Description of Drawings

[0001] Other aspects of the present invention will herein be illustrated in the following description, given as an example only, with reference to the attached figures, which are:

[0002] [Fig.1] is a photograph of some of the robotic apparatus for cleaning the swimming pool bottom available on the market.

[0003] [Fig.2] a) is a photograph demonstrating the apparatus disclosed in the previous art document no. EG29013 and showing that protection wheels are at higher level than that of brushes and placed in the outer perimeter. The apparatus is supported on the lower brushes.

[0004] b) is a photograph demonstrating the apparatus disclosed in the previous art document and showing the deformations that occurred in the brushes due to the apparatus load thereon.

[0005] [Fig.3] illustrates the main body of the vacuum cleaning machine, in which all parts of machine are fixed.

[0006] [Fig.4] illustrates a second body connected to the main body via hinges in a way it maintains free movement. At least two parts are attached to the main body. [0007] [Fig. 5] is a third body connected to the main body via hinges in a way it maintains free movement. At least one part is attached to the main body.

[0008] [Fig 6] a rear stud fixed onto the main body.

[0009] [Fig 7] a front stud fixed onto the main body.

[0010] [Fig 8] Front hinges, not less than 12 pieces, fixed onto the main body.

[0011] [Fig 9] Front hinges, not less than 6 pieces, fixed onto the second and third bodies.

[0012] [Fig 10] Rear hinges, not less than 6 pieces, fixed onto the second and third bodies.

[0013] [Fig 11] illustrating secure areas for lifting and loading the machine, wherein there are at least two pieces fixed onto the main body.

[0014] [Fig 13] is a guide wherein there are three pieces, at least, fixed onto the main body.

[0015] [Fig 14] is a first brushes holder of two pieces, at least, fixed onto the second body.

[0016] [Figs 15, 16, 17, 18, 19] a set of brushes fixed onto the first brush mount.

[0017] [Fig 20] is a second brushes holder of a single piece, at least, fixed onto the third body.

[0018] [Figs 21 , 22, 23] is a set of brushes fixed onto the second brush holder.

[0019] [Fig 24] is a structure for a set of movement conveyors, wherein there are at least 4 pieces fixed onto the main body.

[0020] [Fig 25] a front roller, wherein there are at least 4 pieces secured into the structure for the set of movement conveyors.

[0021] [Fig 26] a rear roller, wherein there are at least 2 pieces secured into the structure for the set of movement conveyors.

[0022] [Fig 27] a guide for adjusting the set of conveyors, wherein there are at least 4 pieces secured into the structure for the set of conveyors.

[0023] [Fig 28] a guide bolting the set of conveyors, wherein wherein there are at least 4 pieces secured into the structure for the set of conveyors.

[0024] [Fig 29] a fixing means of the guide for adjusting the set of conveyors, wherein there are at least 4 pieces secured into the structure for the set of conveyors. [0025] [Fig 30] a carrier for the rear real, wherein there are at least 4 pieces secured into the structure for the set of movement conveyors.

[0026] [Fig 31] a carrier for the suction tubes, wherein there are two pieces fixed onto the main body.

[0027] [Fig 32] a fixing means for the carrier of suction tubes, wherein there are two pieces fixed onto the main body.

[0028] [Fig 33] a fixing means for the suction tubes, wherein there are at least 6 pieces fixed onto the main body.

[0029] [Fig 34] a carrier of the electric motor, wherein there are at least two pieces fixed onto the structure of the set of movement conveyors.

[0030] [Figs 35, 36, 37]: a bumper and sensor carrier, wherein there are at least 4 pieces fixed onto the main body.

[0031] [Fig 38] is a shaft of the rear roller, wherein there are at least 2 pieces secured into the structure for the set of movement conveyors.

[0032] [Fig 39] is a shaft of the front roller, wherein there are at least 4 pieces secured into the structure for the set of movement conveyors.

[0033] [Fig 40] a fixing post of the electric motor, wherein there are at least 2 pieces secured into the structure for the set of movement conveyors.

[0034] [Fig 41] a guide pin for adjusting the set of conveyors, wherein there are at least 4 pieces secured into the structure for the set of movement conveyors.

[0035] [Fig 42] a shaft of the guide, wherein there are at least 3 pieces secured onto the main body.

[0036] [Fig 43] is a flexible hose, wherein there are at least 9 pieces attached through the tubes fixed into the second and the third bodies, and tubes in the main body.

[0037] [Fig 44] is an elbow of not less than 2 inches, wherein there are 14 pieces thereof for assembling the suction tubes.

[0038] [Fig 45] is a tube of not less than 2 inches, wherein there are 3 pieces thereof for assembling the suction tubes. [0039] [Figs 46, 47, 48] tubes of not less than 2 inches for suction, wherein there are at least two pieces of each length, fixed into the main body.

[0040] [Fig 49] a motor for mobility, secured into the structure for the set of movement conveyors, of 250 Watt/24 V.

[0041] [Fig 50] power supply.

[0042] [Fig 51] a spring for controlling the brush pressure.

[0043] [Fig 52] a waterproof camera, for monitoring surfaces, fixed onto the main body.

[0044] [Fig 53] a remote control for operating the machine.

[0045] [Fig 54] an ultrasonic sensor for exactly determining the distance between it and bodies ahead.

[0046] [Figs 55, 56, 57, 58] assembling design and final form of the Cleaning machine.

[0047] [Fig 59] is illustrative figure for the way of maneuvering with the machine for automatically changing its track direction upon finding any obstacle.

Description of Embodiments

[0001] According to this invention, it is introduced a machine for removing sediments out from the huge size water structures bottom. It is an electric vacuum cleaner composed of a main body 1 in which all other parts are fixed, being a sheet of non-corrosive materials fitting in at least two pieces; first secondary body 2 and second secondary body 3, as illustrated in figures (3, 4 and 5), all connected together using hinges of up-down free movement as seen in figures (8, 9 and 10). There are, in every secondary body, at least 3 suction openings, on each of which a small tube is secured upwardly projecting from the main body. At least two studs are further secured into the main body 1 ; a rear stud 4 of non- corrosive materials and a front stud 5 to vertically strengthening it. Each stud contains at least two rings for lifting and carrying the apparatus in safe manner (Figures 6 and 7). There are also a set of brushes fixed onto the first and second bodies (Figure 15 - 19, 21 - 23), wherein the machine is put on motion via at least two set of movement conveyors (Figure 24) at each side of the main body in connection with the assembly of engines as seen in Figure (50).

[0002] Based on the foregoing, the set of hinges connecting the main body 1 with secondary bodies 2,3 are front hinge 6, comprising at least 12 pieces, each of which is fixed in the main body 1 , front hinge 7, comprising at least 6 pieces placed into the first and second secondary bodies 2 and 3, and rear hinge 8 comprising at least 6 pieces secured into the first and second secondary bodies 2 and 3.

[0003] In reference to the figures (56 to 58), there are a set of brushes into the first and second secondary bodies 2, 3. Wherein they are grouped into two sets: a set of brushes 13, 14, 15, 16 and 17 fixed onto the first brushes carrier 12, having at least two parts, each of which is attached to secondary body 2, and a set of brushes 19, 20 and 21 fixed onto the second brushes carrier 18, of at least one piece fixed onto the secondary body 3. There is also a spring for adjusting the pressure of brushes 49.

[0004] The invention discloses how the vacuum cleaner moves upon coupling at least two sets of movement conveyors on each side of the main body 1. Wherein each set of movement conveyors 53 is composed of flexible rubber (such as PVC, as an example), a structure 22 of non-corrosive materials fixed into the main body 1. The said body is as well provided with at least 6 rollers perpendicularly placed. 2 front rollers 23 are positioned into the structure of the set of movement conveyors 22 via front roller shaft 37. Wherein this shaft is of two pieces attached to the structure of the set of movement conveyors. There is also rear roller 24 fixed into the structure of the set of movement conveyors 22 via rear roller shaft 36. Wherein this shaft is of at least one piece attached to the structure of the set of movement conveyors with the presence of the rear roller carrier 28, Wherein this shaft is of two pieces attached to the structure of the set of movement conveyors.

[0005] This invention further discloses that it comprises a plurality of suction tubes as seen in the figures (31 to 33), wherein it comprises joints 44, 45, 46 of suction tubes not less than 2 inches in gauge. There are at least two of them positioned into the main body 1 of the same gauge not less than 2 inches 43. There are at least 3 pieces for assembling suction tubes onto the main body, an elbow 42 not less than 2 inches, about 14 pieces of which, at least, for assembling suction tubes, and resilient hose connector 41 of about 2 inches, 9 pieces of which, at least for connecting tubes fixed into the first secondary body 2 and second secondary body 3 and those tubes in the main body 1. In addition to the suction tube carrier 29, there are at least two pieces of which fixed into the main body 1 , at least 2 pieces fixed in the suction tube carrier 30 attached to the main body 1 , and at least 6 pieces of other pieces of suction tube carrier 31 fixed into the main body 1.

[0006] Each set of movement conveyor is connected to the arrangement of motor, at least two sets of which on each side of the vacuum cleaner. The arrangement of motor consists of a driving motor 47, placed into the structure of the set of movement conveyors, of no less than 250 Watt/24 Volt in power, and electric motor carrier 32, of at least two pieces, each of which is fixed into the structure 22 of the set of movement conveyors, a post for holding the electric motor carrier 38, placed into the structure 22 of the set of movement conveyors.

[0007] A bumper, a carrier of sensors 33, 34 and 35 are further placed into the main body of the Vacuum cleaner 1 , as seen in the figures (35 to 37), and power supply 48 as in figure (51 ).

[0008] The invention is characterized with that the cleaning machine is empowered by a programmed electronic remote control 51 and with the presence of underwater camera 50 fixed onto the main body 1 , it is feasible to make sure that all parts the Vacuum cleaner has gone through are already well-cleaned. In case of some spots left unclean, the Vacuum cleaner can be directed via the remote control to go back to such spots once again. The camera may as well monitor the status of liner surfaces of the water structure bottom for discovering and locating any affected area therein.

[0009] Advantageously, the Vacuum cleaner of the present invention is characterized with, comparing to the existent conventional ones, that it has ultra sonic sensor 52, in addition to the camera 50, for determining in an exact manner the distance the vacuum cleaner is kept from the bodies ahead for not be collided with any blockage it fronts while cleaning the bottom.

[0010] By using the programmed remote control, the vacuum cleaner’s user can select a proper program among others available on an electronic chip for cleaning the bottom depending on the expected amount of sediments in the bottom and then determining the suction power based on the area of the water structure, and the speed of the vacuum cleaner accordingly, with turning on both the camera and an ultra-sonic sensor for avoiding any impacts upon moving the vacuum cleaner.

[0011] Standard specification for the mass of the Vacuum cleaner:

[0012] Length= 1 ,960.00 mm

[0013] Width= 496.74 mm

[0014] Mass= 142,407.1 gm

[0015] Volume= 5,655,302.89 mm ³

[0016] Surface area= 12,553,416.01 mm ²

[0017] Coordinates of the center of mass:

[0018] X= 498.77 mm

[0019] Y= 822.54 mm [0020] Z= 1599.31 mm

[0021] Principal axes of inertia and principal moments of inertia: (g. mm ² ) taken at the center of mass x = (1.00, 0.00, 0.00) Px = 6,095,342,827.47 y = (0.00, 0.00, -1.00) P _y = 67,467,880,879.71

[0022] Iz = (0.00, 1.00, 0.00) P _z = 72,835,374,286.71

[0023] The Vacuum cleaner engine is featured with the following specifications to acquire the power and speed of suction of bottom sediments.

[0024] Voltage: 24 VDC Rate Speed: 270 rpm

[0025] Rated Current: 14 A Output: 250 w

[0026] One round = 72.885 cm Load: 100 kg

[0027] Leader Wheel Radius = 11 .6 cm One wheel Revolution =

72.9 cm

[0028] Max speed without load = 270 rpm x 72.9 cm = 196.8 m/min.

[0029] Minimum speed without load =10 rpm x 72.9 cm = 7.3 m/min.

[0030] To operate the vacuum cleaner device to suck the sediments from the bottom of the water structures, it must first be known that the daily cleaning rate and ease of movement and maneuvering are the main requirements in the huge artificial lakes cleaning devices, as the regular swimming pool cleaning devices are small in size, which makes them take a very long time if used in cleaning the bottom of these lakes, which is not required. The cleaning rate of any device depends on the size of the device itself (its surface area) and the speed with which it moves, but the speed is restricted by the quality of the suction process. Therefore, the small device produces a small cleaning rate, regardless of its speed, and to enlarge the size of the device with ease of movement it was necessary to get rid of the means of suction and means of filtering (filter), so the current device does not contain a means of suction, as its suction pumps are in the machine room, and it also uses filters for the lake. [0031] The points of pumps suction are located on the outer perimeter of a structure. Such points are connected to the pumps in the machine room via a flexible hose, 4 inches in diameter, bonded with the machine using an adaptor onto the suction tube carrier 29. This hose is 50 to 200m in length depending on the surface to be cleaned.

[0032] The two machine engines are supplied by Lithium battery of at least 24 Voltage in small size placed in the power supply. It includes at least two electrical engines for driving a set of movement conveyors in right and left sides.

[0033] By turning the machine on via the remote control 51 , the two engines are simultaneously on, driving the machine forward with a speed controlled by the remote control 51 .

[0034] The set of brushes 13, 14, 15, 16, 17, 18, 19, 20, 21 works on drifting the sediments and dirts out to be collected at the suction points in the main body 1 and secondary bodies 2, 3, and going through the suction tube 10 and the flexible hose 41 towards the tubes 44, 45 and 46 in their way to the hose connected to the suction pump point on the perimeter of lagoon or water facility.

[0035] The bottom of most huge water structures is covered by water-impermeable plastic liner having wrinkles, through which the machine go, leading the secondary bodies 2, 3 upward under the pressure of the plastic bed. The spring 49 mounted onto the guide 11 allows these bodies to move to an extent not less than 7 cm. When the machine finishes such wrinkles area, the spring 49 returns to its original position, forcing the two secondary bodies 2, 3 downward to its original position. As such, the brushes and the plastic liner will be immune from damage while guaranteeing a high-quality cleaning.

[0036] Upon driving the machine forward, the camera 50 captures photos of the surface cleaned and displays them on the screen of the remote control 51 . Wherein the operator watches over how good the cleaning by the said machine goes. It also discloses if there is any cutting or tearing in the plastic bed.

[0037] By turning the machine on via the remote control 51 , distance sensors 52 are turning on and generate ultra-sonic rays. When and if the machine comes near any obstacle 100 (wall, a person... etc.) in a distance away at least 1 .25 m, the sensor 52 stops the machine at the position P1 (Figure 59) and sets the remote on an alarm for a defined time (predetermined in the machine settings). If the supervisor makes no action within the defined time, the machine starts to pivots horizontally counterclockwise at a right angle up to P2 then to move in a straight line for a distance at least 1 .75 m up to P3 where it pivots again counterclockwise at a right angle to P4 to move forward and finish the cleaning process. Figure (58) demonstrates such maneuver with the machine automatically.

[0038] Controlling the direction of vacuum cleaner movement is done by controlling the movement of right and left engines as follows: a. Upon working the two engines together, the machine goes forward, b. When only the right engine stops, the right conveyor stops moving, while the left conveyor is on motion, the machine turns clockwise and the pivot of rotation would then be the right side of the machine. c. When only the left engine stops, the left conveyor stops moving, while the right conveyor being on motion, the machine turns counterclockwise and the pivot of rotation would then be the left side of the machine. d. When both engines are on motion, but each moving in an opposite direction, the machine rotates around its pivot (the middle point). The direction of rotation will be based on that of both engines. e. It is possible to move the machine backward, yet the cleaning will not be of much effect since the orientation of brushes and location of suction points deactivate the suction of sediments and dirts when moving backward. It moves back for the sake of making maneuvers or when an area is monitored by a camera not cleaned well, so the machine can go back to and re-clean this area.

[0039] It is worth noting that the operator makes any of previous action if the machine stops for a time period during which the machine is on stand by mode (this time period is controllable via the machine settings). If the operator makes no action to such effect, the machine will make the last maneuver automatically.

[0040] Table 1