Constructive arrangement provided in underwater lighting

Description

Ml CONSTRUCTIVE ARRANGEMENT PROVIDED IN UNDERWATER LIGHTING TECHNICAL FIELD

[001] The following descriptive report for a utility model refers to the development of an underwater luminaire for use in swimming pools, whose distinguishing feature is the possibility of easy replacement, composed of two parts, where the first is installed in the pool and the second has the LED for illumination and the communication between the two parts is wireless, using induction power supply technology. STATE OF THE ART

[002] An underwater pool light is a lighting fixture designed to work underwater, bringing both safety and aesthetics to the pool environment.

[003] It is a hermetically sealed light fixture, designed to withstand water pressure and prevent leaks. It typically uses LEDs (for their durability and low consumption), but halogen versions are also available, and it can be installed on pool walls or in strategic locations to create visual effects.

[004] The biggest problem with underwater lights is sealing, with the light body constructed from corrosion-resistant materials (such as ABS, stainless steel or polycarbonate), featuring sealing rings to prevent water ingress and special sealing products.

[005] Another solution found to avoid leakage problems is the use of induction reflectors.

[006] An induction pool spotlight is a type of underwater lighting that eliminates the need for direct electrical connections within the water. Instead of wires running through the recess, it uses the principle of induction. Petition 870250108621, dated 11 / 27 / 2025, page 6 / 16 2Π electromagnetic: energy is transferred from a transmitting coil (installed on the dry part, behind the pool wall) to a receiving coil (in the reflector body, inside the water) by means of a magnetic field.

[007] This solution offers several advantages over conventional insulation methods, such as: Maximum safety, since there is no direct electrical contact with the water, the risk of electric shock is practically eliminated; - Simplified installation, as it does not require drilling or running cables into the pool, reducing the risk of leaks; Easy maintenance, because the reflector can be removed or replaced without emptying the pool; and - Greater durability because it has fewer points of oxidation and wear, since there are no metal connections exposed to water.

[008] In the operation of an underwater induction light, the reflector base is fixed to the pool wall, aligned with the transmitter coil on the dry side. Electrical energy powers the transmitter coil, which creates a magnetic field. This field is captured by the receiver coil in the reflector, converting it back into electrical energy to light the LEDs.

[009] The pool light fits directly into this power source and, together, a magnetic field induces energy in the light coils. The safety benefits, simplicity of installation, and ease of replacement of this technology have made induction lighting a modern and popular option for savvy pool owners. Many industry professionals have already implemented this technology in the pools they service. It is also quicker and easier to prepare the pools. Petition 870250108621, dated 11 / 27 / 2025, page 7 / 16 3 / 7 for winter and replace underwater lights. Maintenance technicians can work with underwater lights without even turning off the power. Another safety benefit is that there is an automatic power shut-off that is an integral part of the system. When the light is not in place, the magnetic field is no longer created and therefore the power is simply not turned on. This means there is no possibility of leakage or electric shock. In addition to eliminating the risk of electric shock, induction pool lighting solves many of the problems associated with traditional pool lights, such as the difficulty of running wiring through pool walls and corrosion of contacts due to the corrosive environment of pool water.

[010] An example of a wireless lighting system for a swimming pool is described in document CN110798941, which comprises a main control circuit and several induction lights placed in the pool; the power coil L3 of the main control circuit is buried in a concrete structure at the bottom of the pool, and the input end of the main control circuit is connected to the main power supply; the induction lights are provided with a receiver coil L2 and an LED lamp, and the receiver coil L2 lights the LED lamp upon detection by the power coil L3 to illuminate the LED lamp. This application allows for complete isolation from high voltage without any electrical safety risks, easy installation, only copper wires need to be laid at the bottom of the pool.

[011] Document US20160323952 discloses an inductively coupled lighting system for use in high-humidity operating environments, offering inductive coupling Petition 870250108621, dated 11 / 27 / 2025, page 8 / 16 4 / 7 electromagnetic for simultaneous wireless (contactless) transfer of power and lighting control commands. PROBLEM WITH THE TECHNIQUE

[012] Despite the existence of lighting systems that employ wireless technology for underwater lighting in swimming pools, there are challenges to be overcome due to problems common to this type of technology, for example: Inductive coupling is never 100% efficient. Some energy is lost as heat, which can reduce light intensity or require more power from the source. - If the system is not well designed, the coils may overheat, compromising the sealing of the light fixture or the lifespan of the LEDs; The magnetic field used to transfer energy can generate electromagnetic noise that affects other nearby equipment, especially in environments with automation or electric pumps; - For efficient energy transfer, the transmitting and receiving coils need to be properly aligned. Small misalignments can cause power failure. Although there is no direct electrical contact, the exterior of the luminaire is still exposed to water and chemicals (such as chlorine and salt), which can affect its durability; and, This type of technology is more expensive and requires greater care in installation and maintenance compared to conventional 12V wired light fixtures.

[013] Inductive coupling offers advantages such as electrical safety (no exposed cables inside the pool) and ease of maintenance (the light fixture can be removed without opening the seal). However, Petition 870250108621, dated 11 / 27 / 2025, page 9 / 16 5 / 7 The main risks are related to energy efficiency, electromagnetic interference, and coil alignment. PROPOSED SOLUTION

[014] Thus, due to considerations pertinent to the problems of the technique, one of the objectives of the present utility model is to develop an underwater luminaire for use in swimming pools, which can be replaced with great ease.

[015] Another distinguishing feature of this luminaire is its two-part composition, where the second part contains the LED for illumination and communication between the two parts will be wireless, using induction power supply technology.

[016] The transmitter, with the purpose of transmitting energy wirelessly to the receiver, has its operation based on an LC tank circuit and a self-resonant oscillator with a frequency around 125KHz.

[017] It will be powered by a 12V DC power supply.

[018] It will have an RS-485 communication port for communication, via Modbus-RTU protocol, with a controller module.

[019] A frequency modulation of the oscillator (FSK modulation) will be implemented for sending commands to the receiver.

[020] To receive the responses sent by the receiver, an ASK demodulator circuit will be implemented based on the processing of the oscillator's current intensity variations.

[021] FSK modulation, ASK demodulation and RS-485 communication will be performed by an STM32C011F4P6 microcontroller. Petition 870250108621, dated 11 / 27 / 2025, page 10 / 16 6 / 7

[022] The receiver will also have an LC tank circuit tuned to the same frequency as the transmitter. When the receiver is brought close to the transmitter, a magnetic coupling is created between the tank circuits, which resonate, and thus energy is transmitted from the transmitter to the receiver. The energy received by the receiver is a sinusoidal wave of approximately 20V which passes through a rectifier circuit and a filter allowing the power supply to the driver circuits of the reflector LEDs and the microcontroller.

[023] Amplitude modulation (ASK modulation) will be implemented to send information to the transmitter. This modulation will be performed by switching capacitors connected to the tank circuit, which will act as loads and reflect variations in current intensity in the transmitter oscillator.

[024] To receive commands sent by the transmitter, an FSK demodulation will be implemented based on the time count of the tank circuit frequency.

[025] ASK modulation, FSK demodulation and LED control will be performed by an STM32C011F4P6 microcontroller. DESCRIPTION

[026] The characterization of the present utility model is made by means of representative drawings of the constructive arrangement provided in an underwater luminaire, in such a way that the product can be fully reproduced by appropriate technique, allowing full characterization of the functionality of the object claimed.

[027] Based on the elaborated figures that express the preferred way of realizing the product now conceived, the descriptive part of the report is based, through a detailed numbering and Petition 870250108621, dated 11 / 27 / 2025, page 11 / 16 consecutively, where she clarifies aspects that may be implied by the adopted representation, in order to clearly determine the protection now sought.

[028] These figures are merely illustrative and may present variations, provided they do not deviate from what was initially requested.

[029] In this case, we have to: Figure 01 shows an isometric perspective of the proposed underwater light fixture; Figure 2 shows a side view of the light fixture illustrated in Figure 1; and Figure 3 shows an exploded view of the proposed light fixture.

[030] The proposed underwater luminaire employs induction technology that eliminates the need for direct electrical connections within the water, comprising a base (1) that receives, frontally and internally, the first inductor (2), a first PCB board (3) that is inserted into support rails (4), a second PCB board (5) with the LED (5a) that attaches to the first (3), with the display (6) attached to this second board (5) and a lens (7) attached to this display. On the back of the base (1) is attached a niche (8) that receives a sealing O-ring (9), a second inductor (10), a third PCB board (11), a cover (12) that closes the niche (8), where this cover (12) has a hole (13) for the passage of the cable (14), held in this position by means of a cable gland (15). Petition 870250108621, dated 11 / 27 / 2025, page 12 / 16

Claims

1 / 1 CLAIMS 1- CONSTRUCTIONAL ARRANGEMENT PROVIDED IN UNDERWATER LIGHTING, employs induction technology that eliminates the need for direct electrical connections inside the water, characterized by being composed of two parts, where the first (8) is installed in the pool and the second (1) has the LED (5a) for lighting and communication between the two parts. 2- UNDERWATER LIGHTING, in accordance with claim 01 and characterized by: a) - comprising a base (1) that receives, frontally and internally, the first inductor (2), a first PCB board (3) that is inserted into support rails (4), a second PCB board (5) with the LED (5a) that is attached on the first (3), wherein the display (6) is coupled to this second board (5) and a lens (7) is coupled to this display; and b) - on the rear part of the base (1) is coupled a niche (8) that receives a sealing O-ring (9), a second inductor (10), a third PCB board (11), a cover (12) that closes the niche (8), wherein this cover (12) has a hole (13) for the passage of the cable (14), maintained in this position by means of a cable gland (15). Petition 870250108621, dated 11 / 27 / 2025, page 13 / 16

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