Hydronic air-handler devices and systems
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Solution Overview
Problem
The installation of hydronic air-handler units (AHUs) is complex due to the need for additional components like pumps, air-bleed systems, expansion tanks, and make-up devices, which increases labor and costs, especially when using water-glycol mixtures, and requires specialized skills and tools.
Innovation Solution
A hydronic AHU with integrated components including a pressurized tank for fluid expansion and air bleeding, a non-pressurized tank for make-up fluid, and a valve system to maintain pressure, allowing for easy installation and operation without separate tools or skills, and an optional control valve for directing hydronic fluid to other devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a hydronic loop is used to heat or cool the air-handler unit, then heating or cooling functionality is achieved, but installation complexity increases due to additional components required
Solution Approach 1:
The patent combines multiple separate hydronic loop components (expansion tank, air separator, filter, and make-up device) into a single integrated housing. This merging eliminates the need for separate installations of each component and reduces the overall number of connections and mounting locations required, directly addressing the installation complexity issue while maintaining full heating and cooling functionality
Solution Approach 2:
The integrated housing serves multiple functions simultaneously: it acts as an expansion tank for pressure regulation, an air separator for air bleeding, a filter for fluid purification, and a make-up device for fluid replenishment. This multi-functionality eliminates the need for separate dedicated components for each function, reducing installation complexity while maintaining system versatility
2Reliability
If separate make-up devices are used for water-glycol systems, then fluid replacement is achieved, but device size and installation cost increase
Solution Approach 1:
The make-up device functionality is merged into the integrated housing, eliminating the need for a separate large-capacity make-up tank. The housing incorporates a make-up fluid reservoir and delivery mechanism that provides fluid replacement capability within the compact integrated structure, reducing overall device volume while maintaining reliability
Solution Approach 2:
The integrated housing serves as both the expansion tank and the make-up device, combining functions that traditionally required separate components. This multi-functionality allows the same structure to handle both pressure regulation and fluid replenishment, eliminating the need for additional dedicated make-up device volume
3Reliability
If multiple separate components are installed for the hydronic loop, then system functionality is achieved, but labor cost and installation time increase
Solution Approach 1:
By merging expansion tank, air separator, filter, and make-up device into a single integrated unit, the installation process is simplified from multiple separate component installations to a single installation. This reduces the time required for mounting, connecting, and configuring multiple components while maintaining all necessary system functions through the integrated design
4Adaptability or versatility
If conventional hydronic AHU components are used, then heating or cooling is achieved, but specialized installation skills and tools are required
Solution Approach 1:
The integration of multiple complex components into a single pre-assembled unit reduces the installation task to connecting a single device rather than coordinating multiple specialized components. This merging simplifies the installation process to levels familiar to conventional forced-air heating and cooling installers, eliminating the need for specialized hydronic loop installation skills and tools while maintaining full heating and cooling capability
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 integration simplifies the installation process, reduces labor costs, facilitates easy filling and air bleeding of the hydronic loop, eliminates the need for a separate make-up device, and ensures reliable operation by maintaining safe pressure levels and fluid levels.
Implementation Method 1
a pressurized tank that contains a volume of hydronic fluid and a volume of air above the hydronic fluid to provide an expansion volume
Implementation Method 2
a pressurized tank that contains a volume of hydronic fluid and a volume of air above the hydronic fluid to provide an expansion volume
Implementation Method 3
a valve that allows the second hydronic fluid to flow from the second vessel to the first vessel when pressure inside the first vessel decreases below zero psig
Implementation Method 4
a blower that moves air over and/or through the heat exchanger
Implementation Method 5
a blower that moves air over and/or through the heat exchanger
Implementation Method 6
a pump that circulates the hot or cold hydronic fluid
Data Source
AI summary
A device that heats/cools air includes a heat exchanger that contains hydronic fluid; a blower that moves air over and/or through the heat exchanger; a pump that circulates the hydronic fluid; a first vessel that contains hydronic fluid under pressure, air, a sealed first opening, a second opening that allows the hydronic fluid to exit the first vessel, a third opening that allows the hydronic fluid to enter the vessel, and a fourth opening; a second vessel that contains hydronic fluid at atmospheric pressure, a sealed first opening, and a second opening in communication with the first vessel, wherein the second vessel is in communication with the fourth opening; a valve that allows hydronic fluid to flow from the second vessel to the first vessel when pressure inside the first vessel decreases below zero psig, and prevents hydronic fluid from flowing from the first vessel to the second vessel.