Condensate Drain Access With Overflow Switch for Safe Clog Clearing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing HVACR condensate drain line maintenance methods require manual shut-off valves, which can lead to pipe damage, human error, and compromised water tight integrity, and lack a safety mechanism to prevent overflow during clog clearance.
Innovation Solution
An inline access device with a removable cover and adapter for easy connection of pressurized sources, and an internal overflow safety switch that disables HVAC units in case of clog-induced backup, allowing for clog clearance without manual valve operation and ensuring unobstructed access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual shut-off valves are used in drain line access devices, then the drain line can be closed off during cleaning procedures, but the valve operation can cause pipe damage and human error may lead to forgotten valve opening
Solution Approach 1:
The patent removes the manual shut-off valve from the system entirely. Instead of using a valve to close off the drain line during cleaning, the invention uses a removable plug that can be easily inserted and removed from the access device. This extraction of the problematic valve component eliminates the issues of valve-induced pipe damage and human error while maintaining the ability to seal the drain line during cleaning operations.
Solution Approach 2:
The access device is designed to be self-sealing through a simple plug insertion mechanism rather than requiring manual valve operation. The plug automatically seals the drain line when inserted, and its removal automatically opens the line for flow. This self-service approach eliminates the need for complex valve operations and reduces the risk of human error.
2Ease of operation
If the drain line is cut to create access for cleaning, then cleaning access is achieved, but the water tight integrity of the drain line is compromised and leaks occur at repair joints
Solution Approach 1:
The access device is pre-installed in the drain line during initial installation, creating a permanent access point that does not require cutting the drain line later. This preliminary action ensures that the drain line's water tight integrity is maintained while providing ready access for cleaning operations. The access device includes sealed connections that preserve the integrity of the drain line system.
Solution Approach 2:
Instead of cutting the drain line to create access, the invention extracts the need for cutting by providing a pre-installed access device with a removable plug. This allows cleaning access to be achieved by simply removing the plug rather than cutting into the drain line, thereby maintaining the water tight integrity of the original drain line installation.
3Device complexity
If no overflow safety mechanism is present, then the device structure remains simple, but condensate backup can cause accidental overflow and extensive damage
Solution Approach 1:
The patent introduces an overflow safety switch as an intermediary component between the drain line and the HVAC system. This switch monitors the drain line for blockages and automatically shuts down the HVAC system when an overflow condition is detected. The intermediary safety switch adds minimal complexity while effectively preventing the harmful effects of condensate overflow and potential damage to building structures.
Solution Approach 2:
The overflow safety switch provides beforehand cushioning by detecting potential overflow conditions before they can cause extensive damage. The switch is positioned to detect condensate backup in advance and triggers a system shutdown proactively, preventing the harmful effects of overflow rather than responding after damage occurs.
Data Source
AI summary
An access device for installation to a condensation drainage system, such as a drain line of an HVAC unit, includes a main body with at least one connecting port for sealed, fluid receiving connection to the drainage system and an open top communicating with an interior cavity. A top cover releasably secures to the main body to completely cover the open top. An overflow safety switch is removably held in operable position within the interior cavity and below the top cover. The switch senses the level of condensate liquid accumulating with the interior cavity and sends an electronic signal to disable the condensation producing equipment if the liquid reaches a predetermined level.