Integrated ERV Port Layout to Prevent Stale Air Recirculation
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Solution Overview
Problem
Conventional energy recovery ventilators (ERV) require complex and costly installations with multiple duct pipes and separate power supplies, and often suffer from increased stale air recirculation when directly connected to heating or cooling systems.
Innovation Solution
An ERV system with a direct electrical connection to the heating or cooling system, utilizing a fresh air intake duct and exhaust air duct with selectively movable dampers and a heat and mass exchange device, minimizing fresh air recirculation through a supply port and return port configuration that prevents stale air ingestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an ERV is remotely mounted and connected to a heating or cooling system, then energy recovery function is provided, but installation complexity and cost increase due to requiring four separate duct pipes and additional power receptacles
Solution Approach 1:
The patent combines the ERV unit with the heating or cooling system into a single integrated assembly. The ERV is mounted directly within the blower compartment, sharing the same housing and electrical system. This merging eliminates the need for separate ductwork and power connections, reducing installation complexity while maintaining energy recovery functionality.
Solution Approach 2:
The integrated ERV-heating/cooling system performs multiple functions: energy recovery, heating, and cooling, all within a single unit. The system uses the existing blower motor and electrical connections to operate the ERV, eliminating the need for dedicated power receptacles and controls. This multi-functionality approach reduces the number of separate components and installation requirements.
2Device complexity
If an ERV is directly connected to a furnace or air handler blower compartment, then installation complexity is reduced, but stale air recirculation increases
Solution Approach 1:
The patent segments the air handling functions into separate pathways: fresh air intake, return air intake, and exhaust air discharge. The ERV unit is positioned to receive fresh air from one location and discharge it through a separate pathway, while return air is drawn from a different location. This segmentation prevents mixing of air streams and eliminates stale air recirculation while maintaining direct connection to the blower compartment.
Solution Approach 2:
The patent introduces intermediate components such as dampers and air flow guides that mediate between the ERV discharge and the return air pathways. These intermediaries ensure that discharged fresh air is directed away from return air inlets, preventing recirculation. The blower compartment itself acts as an intermediary space that manages air flow distribution without causing stale air to re-enter the ERV system.
3Object-generated harmful factors
If an ERV is remotely mounted with separate duct connections, then stale air recirculation is minimized, but installation cost and time increase due to requiring four duct pipes and low voltage wall controls
Solution Approach 1:
The patent merges the ERV controls with the existing heating/cooling system controls, eliminating the need for separate low voltage wall controls. The ERV operates automatically based on signals from the existing system thermostat and controls, reducing installation time and complexity while maintaining proper air flow management to prevent stale air recirculation.
Solution Approach 2:
The system uses the existing heating/cooling system's control infrastructure to operate the ERV, making the controls universal for both systems. This eliminates the need for additional control components and reduces installation time while maintaining the air flow separation necessary to prevent stale air recirculation.
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
Simplifies installation by eliminating the need for multiple ducts and standalone power supplies, while reducing stale air recirculation by ensuring fresh air is directed away from the return port, enhancing energy recovery efficiency.
Implementation Method 1
The ERV includes a heat and mass exchange device for recovering energy from the stale conditioned air
Implementation Method 2
The ERV includes a heat and mass exchange device for recovering energy from the stale conditioned air
Data Source
AI summary
An energy recovery system includes a heating or cooling system and an energy recovery ventilator operably connected to a component of the heating or cooling system. The energy recovery ventilator includes a supply port extending into the component to provide a supply of fresh airflow from the energy recovery ventilator to the component for use by the component. A return port extends into the component configured to receive a flow of stale air from the component while minimizing ingestion of the fresh air flow from the component into the return port. A method of operating an energy recovery system includes flowing a flow of fresh air from an energy recovery ventilator through a supply port into a component of a heating or cooling system. Stale air is flowed from the component through a return port into the energy recovery ventilator.