Source Air Duct Layout to Prevent Mixing at Temperature Control Outlets
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Solution Overview
Problem
Existing air conditioning devices for rooms face inefficiencies in displacement ventilation due to the absorption of source air at temperature control outlets, leading to unwanted mixing and buoyancy, which hampers the formation of a source air lake and effective air circulation.
Innovation Solution
The use of slot outlets with air guiding elements at the source air release section, oriented to direct airflow away from the temperature control outlets, combined with hole outlets and a distribution wall element, to separate and direct source air flows effectively, reducing absorption and turbulence.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If source air is supplied at the first opening section and temperature control is performed at the second opening section, then displacement ventilation and temperature control are both achieved, but source air is absorbed again at the second opening section causing unwanted mixing and reduced ventilation efficiency
Solution Approach 1:
The opening section is segmented into a first opening section for source air supply and a second opening section for temperature control, with the source air outlet positioned adjacent to but separated from the temperature control outlets. This spatial segmentation prevents mixing while maintaining functional integration within a single device housing.
Solution Approach 2:
The source air outlets are arranged in a different spatial dimension relative to the temperature control outlets - specifically positioned adjacent to the side of the housing rather than at the same opening face. This dimensional arrangement creates natural flow separation and prevents re-absorption of source air at the temperature control section.
2Productivity
If conventional outlets are used at the source air supply section, then air is released into the room, but turbulence occurs and source air lake formation is hindered
Solution Approach 1:
The outlet structure incorporates localized quality variations with different outlet types (first outlets and second outlets) having different orientations and characteristics. The first outlets are oriented at an angle to release source air gently, while second outlets provide additional airflow control, creating locally optimized flow conditions that prevent turbulence and promote stable source air lake formation.
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 configuration enhances displacement ventilation by creating a directed, low-turbulence source air flow that prevents immediate absorption at temperature control outlets, allowing for efficient air circulation and the formation of a source air lake, improving room climate and air distribution.
Implementation Method 1
slot outlets with air guiding elements at the source air release section, oriented to direct airflow away from the temperature control outlets
Implementation Method 2
The second channel section is designed for the temperature control of room air (secondary air) and has a second opening section... To control the temperature of the secondary air, a temperature control element is arranged in the second channel section. The temperature control can include heating and/or cooling of the air.
Implementation Method 3
Source air, usually treated outside air, can preferably be supplied at a temperature slightly (for example 2 to 4 K) below room temperature... If the source air is heated by heat sources, such as people, electrical devices, etc., a buoyancy occurs, so that the polluted air rises to the ceiling
Implementation Method 4
A fan for conveying the secondary air can also be provided in the second channel section
Data Source
Figure 1
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AI summary
A device and a method for air conditioning rooms, as well as an air conditioning arrangement, are described. A duct (12) comprises at least a first duct section (18) extending in a longitudinal direction (L) and a second duct section (20) arranged parallel to the first duct section (18). The first duct section (18) has at least one supply air inlet (26) and a first opening section (24) designed to discharge supply air. The first opening section (24) is oriented towards an opening side of the duct (12). The second duct section (20) has a temperature control element (50) and a second opening section (54) designed to receive secondary air and discharge tempered secondary air. The second opening section (54) is oriented towards the opening side of the duct (12).To achieve efficient air conditioning, one or more longitudinally oriented (L) slot outlets (32) are provided at the first opening section (24) for the discharge of the displacement air.