Swimming Pool Cleaner Fluid Distribution System
Solution Overview
Problem
Existing swimming pool cleaners lack efficient mechanisms for uniformly distributing water flow through vacuum tubes, leading to areas of concentrated and reduced flow, which affects their ability to effectively clean both pool surfaces and walls.
Innovation Solution
A swimming pool pressure cleaner with a fluid distribution system that includes a turbine-driven gear reduction stack and a Geneva gear mechanism, allowing for automatic switching between top and bottom cleaning modes and a reverse/spin-out mode, ensuring uniform water distribution through a network of jet nozzles and chambers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If jet nozzles are placed inside a vacuum tube with parallel flow alignment, then the water flow can be directed through the tube efficiently, but this results in areas of concentrated water flow (hot areas) and areas with significantly reduced flow
Solution Approach 1:
The patent applies asymmetry by positioning jet nozzles at angular orientations relative to the vacuum tube axis rather than in parallel alignment. Specifically, jet nozzles are arranged to discharge water at angles (e.g., 45 degrees) to create a spray pattern that distributes flow more uniformly across the tube interior, eliminating the concentrated 'hot areas' and low-flow zones that result from parallel alignment.
Solution Approach 2:
The patent transitions from one-dimensional parallel flow alignment to three-dimensional angular spray distribution. By orienting jet nozzles at angles to the tube axis and to each other, the system distributes water flow in multiple spatial dimensions, achieving more uniform coverage throughout the vacuum tube volume rather than concentrating flow along the tube length.
2Adaptability or versatility
If a pool cleaner is designed to clean both pool walls and water surface, then the cleaner can perform multiple functions, but a user may have to manually switch the pool cleaner from a pool wall cleaning mode to a pool water surface cleaning mode
Solution Approach 1:
The patent implements self-service through an automatic mode-switching system that detects the cleaner's position and autonomously transitions between wall-cleaning and surface-skimming modes. A position sensor (e.g., ultrasonic, optical, or mechanical float sensor) detects when the cleaner approaches the water surface, and a control system automatically adjusts valve positions and jet nozzle orientations to switch modes without user intervention, making the system serve itself.
Solution Approach 2:
The patent employs feedback mechanisms where sensors continuously monitor the cleaner's operational state and position, and this information feeds back to the control system to automatically adjust cleaning parameters. The control system receives feedback from position sensors and autonomously switches between cleaning modes, creating a closed-loop system that adapts to changing conditions without manual input.
3Extent of automation
If a timer assembly with turbine and gear reduction stack is used to rotate a valve disk, then the cleaner can automatically switch between modes, but the device complexity increases
Solution Approach 1:
The patent replaces complex mechanical timer assemblies with pneumatic or hydraulic actuation systems. Pressurized water or air serves as the power source to drive valve disks and mode-switching mechanisms through pressure-differential actuators, eliminating the need for turbines, gear reduction stacks, and associated mechanical timing components. The fluid pressure system provides automatic mode switching with significantly reduced mechanical complexity.
Solution Approach 2:
The patent substitutes mechanical timing and actuation systems with alternative mechanisms. Instead of using a turbine-driven gear reduction stack to rotate valve disks, the system employs electronically-controlled actuators (such as solenoid valves or motor-driven positioners) that receive signals from position sensors and directly control valve positions, replacing intricate mechanical transmissions with simpler electro-mechanical or purely electronic control systems.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The cleaner efficiently switches between modes to clean both pool surfaces and walls, maintaining a uniform water flow, preventing debris entrapment and ensuring thorough cleaning without manual intervention.
Implementation Method 1
The timer assembly includes a turbine that is rotated by the pressurized water, and drives a gear reduction stack that drives a Geneva gear.
Implementation Method 2
swimming pool cleaners can utilize jet nozzles that discharge pressurized water to generate a vacuum or suction effect
Data Source
AI summary
A fluid distribution system for an underwater pool cleaner comprises an inlet body having an inlet for receiving a supply of pressurized fluid, a valve assembly body in fluid communication with the inlet of the inlet body and including a plurality of fluid outlets, a first one of the outlets provides fluid for propelling the underwater pool cleaner in a forward direction and a second one of the outlets provides fluid for propelling the underwater pool cleaner in a reverse direction, and a valve subassembly including a cam wheel that is fluidicly driven by the supply of pressurized fluid and periodically switches the supply of pressurized fluid from the first one of the outlets to the second one of the outlets to periodically change direction of propulsion of the underwater pool cleaner.