Displacement diffuser
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Solution Overview
Problem
Existing HVAC systems with air diffusers suffer from inefficient conditioning, limited ventilation, and high costs, leading to inadequate air distribution and ventilation in indoor spaces.
Innovation Solution
A displacement diffuser that employs thermal displacement diffusion techniques, using a plenum chamber with a high-pressure chamber and low-pressure mixing chamber to mix conditioned air with ambient air, enhancing ventilation and temperature comfort without additional heat exchangers, and discharging air at a comfortable temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If existing air diffusers are used to distribute air from ductwork into interior space, then air distribution is provided, but conditioning efficiency is poor and ventilation is limited
Solution Approach 1:
The plenum chamber is segmented into a first chamber and a second chamber by the plenum plate with apertures, creating distinct zones for different air flow paths. This segmentation allows conditioned air to be directed through specific pathways while inducing ambient air from the interior space, thereby improving both distribution efficiency and conditioning performance simultaneously
Solution Approach 2:
The plenum plate acts as an intermediary element between the first chamber and second chamber, using its apertures to control and direct air flow. This intermediary structure enables the mixing of conditioned and ambient air while maintaining proper flow direction, resolving the contradiction between efficient distribution and effective conditioning
2Quantity of substance
If existing air diffusers are used for air distribution, then ventilation is provided, but ventilation effectiveness is limited and airborne contaminants are not adequately removed
Solution Approach 1:
Instead of simply pushing conditioned air into the space, the system inverts the approach by inducing ambient air to flow into the plenum chamber through the apertures in the plenum plate. This reverse flow path enables contaminants to be drawn into the conditioned air stream and removed through the discharge, effectively addressing contamination while maintaining ventilation
3Ease of operation
If existing air diffusers are implemented in HVAC systems, then air discharge is achieved, but system cost is high
Solution Approach 1:
The plenum chamber structure performs multiple functions: it distributes conditioned air, induces ambient air flow, mixes air streams, and discharges conditioned air to the interior space. By consolidating these functions into a single integrated structure rather than requiring separate components, the system achieves effective air discharge while reducing overall system complexity and cost
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
Improves air conditioning efficiency, ventilation, and reduces costs by mixing conditioned air with ambient air to achieve comfortable temperature and humidity levels, effectively removing airborne contaminants without recirculation.
Implementation Method 1
the plurality of apertures is configured to direct a third air flow from the first chamber into the second chamber to draw the first air flow into the plenum chamber and to force the second air flow out of the plenum chamber
Implementation Method 2
A displacement diffuser that employs thermal displacement diffusion techniques, using a plenum chamber with a high-pressure chamber and low-pressure mixing chamber to mix conditioned air with ambient air
Data Source
AI summary
A diffuser for a heating, ventilation, and air conditioning (HVAC) system includes a housing defining a plenum chamber, where the housing comprises a diffusion plate configured to direct a first air flow into the plenum chamber and to discharge a second air flow from the plenum chamber and a plenum plate disposed within the housing, where the plenum plate extends from a first side of the housing to a second side of the housing opposite the first side, and the plenum plate divides the plenum chamber into a first chamber and a second chamber. The diffuser includes a plurality of apertures disposed along the plenum plate, where the plurality of apertures is configured to direct a third air flow from the first chamber into the second chamber to draw the first air flow into the plenum chamber and to force the second air flow out of the plenum chamber.