Optical Condensate Pan Level Sensing for Corrosion-Free HVAC Drainage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing HVAC systems for controlling condensation in condensate pans rely on mechanical devices that are prone to corrosion, inaccurate, and susceptible to long-term degradation, making them inefficient and costly for monitoring and managing liquid levels.
Innovation Solution
A method using a light beam to determine liquid depth in a condensate pan, where the beam is radiated into the pan and detected at a point below the liquid surface, allowing for real-time monitoring and control of liquid levels, including detection of tilt and variances, and automatic pumping or draining when thresholds are met.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If mechanical devices such as float switches or capacitive switches are used to monitor liquid levels, then the system can detect liquid depth, but the devices are prone to corrosion, inaccurate measurements, and long-term degradation
Solution Approach 1:
The patent replaces mechanical float switches and capacitive sensors with an optical measurement system using light beams and photodetectors. This substitution eliminates mechanical components that are susceptible to corrosion and degradation, providing reliable liquid level measurement without direct contact between sensing elements and the corrosive liquid environment.
Solution Approach 2:
The patent introduces an optical intermediary (light beam) to transfer information about liquid level from the measurement point to the detection point. The light beam acts as a mediator that carries depth information through the condensate pan structure without requiring sensors to be in direct contact with the liquid, thereby avoiding corrosion while maintaining measurement accuracy.
2Measurement precision
If mechanical sensors are installed in the condensate pan, then liquid level can be monitored, but the system occupies mechanical space and has size constraints
Solution Approach 1:
The patent replaces bulky mechanical sensors with compact optical components (light source and photodetector). The optical system requires minimal space within the condensate pan structure, eliminating the need for large mechanical sensor housings and reducing overall device complexity while maintaining measurement functionality.
Solution Approach 2:
The patent extracts the sensing function from physical mechanical components and transfers it to an optical field. By taking out the mechanical sensing elements and replacing them with light-based detection, the system achieves liquid level monitoring with minimal space occupation and reduced structural complexity.
3Measurement precision
If multiple mechanical sensors are installed to detect liquid depth at several points, then tilt and variances can be detected, but the system becomes more complex and costly
Solution Approach 1:
The patent makes the optical measurement system multi-functional by enabling a single light beam and detector configuration to perform both liquid level detection and tilt detection. The system can determine liquid depth at multiple points and detect pan orientation using the same optical components, reducing the number of required sensors while maintaining comprehensive monitoring capability.
Solution Approach 2:
The patent adds dimensional capability to the measurement system by using the angular position and distribution of light detection to infer both vertical depth and horizontal tilt information. This approach extracts multiple parameters from a single optical measurement configuration, eliminating the need for separate sensors for each measurement dimension.
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
This solution improves the reliability and reduces costs by providing accurate and efficient monitoring and control of liquid levels, preventing damage from overflow or leakage, and enhancing the operational efficiency of HVAC systems.
Implementation Method 1
A light beam is radiated into the condensate pan towards a first point that is below a surface of liquid that is collected in the condensate pan, and the light beam is detected at a second point that is below the surface of the liquid
Data Source
AI summary
Systems and methods for determining liquid depth information in a condensate pan of a climate control unit are provided. The systems and methods radiate a light beam into a liquid contained in a condensate pan associated with a climate control unit. The light beam is detected at a point of the condensate pan that is below a surface of the liquid. Information related to the depth of the liquid is determined based at least in part on the detected light beam. The systems and methods disclosed herein can determine if liquid depth in a condensate pan is greater than a threshold depth and can control evacuation of the liquid from the condensate pan.