Pool Cleaning Robot Diaphragm Sensing for Filter Clog Detection
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Solution Overview
Problem
Pool cleaning robots face inefficiencies due to clogged filtering units, which are not easily detected by end users, leading to reduced cleaning performance and the need for improved monitoring solutions.
Innovation Solution
A pool cleaning robot equipped with a sensing module that includes a pressure sensor and pre-programmed processor to measure the cleanliness of the filtering unit, transmitting alerts and data to the user through wireless signals or remote communication devices, and employing a diaphragm to measure internal pressure changes caused by clogging, while compensating for ambient and temperature variations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a pressure sensor is used to measure dirt accumulation in the filtering unit, then measurement precision is improved, but device complexity increases due to additional sensing components and compensation mechanisms
Solution Approach 1:
A diaphragm is introduced as an intermediary component between the filtering unit and the pressure sensor. The diaphragm transmits pressure changes from the filtering unit to the pressure sensor while isolating the sensor from direct exposure to pool water and debris, enabling accurate measurement without complicating the sensor environment
Solution Approach 2:
The system compensates for ambient pressure and temperature variations by measuring these parameters separately and adjusting the dirt accumulation calculation accordingly. This allows the pressure sensor to maintain high measurement precision despite changes in environmental conditions that would otherwise complicate the measurement
2Measurement precision
If ambient pressure and temperature compensation mechanisms are added, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The sensing module is designed to perform multiple functions: measuring dirt accumulation pressure, compensating for ambient pressure changes, and compensating for temperature effects. By integrating these functions into a single modular unit, the system achieves high measurement precision without proportionally increasing overall device complexity
Solution Approach 2:
The system continuously monitors ambient pressure and temperature and uses this feedback to adjust the dirt accumulation measurements in real-time. This feedback mechanism enables accurate measurements across varying environmental conditions without requiring complex manual calibration procedures
3Ease of operation
If wireless communication and pre-programmed processor are integrated, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The pre-programmed processor automatically monitors pressure changes, determines dirt accumulation levels, and transmits alerts to users without requiring manual intervention. The system serves itself by autonomously detecting filter clogging conditions and communicating status, greatly improving ease of operation while keeping the control logic relatively simple through use of pre-programmed algorithms
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 solution enables efficient monitoring of filtering unit cleanliness, alerting users to clogging issues and optimizing cleaning performance by automatically detecting pressure changes and transmitting status updates, thus reducing human intervention and improving cleaning efficiency.
Implementation Method 1
employing a diaphragm to measure internal pressure changes caused by clogging
Data Source
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AI summary
A pool cleaning robot includes a hollow body, a fluid input, a fluid output, a propulsion unit for moving the pool cleaning robot within a pool, a filtering unit, and a sensing module that comprises a gas pressure sensor, a first space (16), a second space (13) and a diaphragm (12). The diaphragm (12) seals the second space (13) and separates the first space (16) from the second space (13). The diaphragm (12), via the first space (16), is fluidly coupled to the filtering unit; wherein the diaphragm (12) is configured to define a gas pressure within the second space (13) as a function of, at least, a fluid pressure within the first space (16); wherein the gas pressure sensor is located within the second space (13) and is configured to measure the gas pressure within the second space (13).