Ceiling Disperser with Pulsed Airflow for Draft-Free Cooling
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Solution Overview
Problem
Conventional ceiling dispersers either require expensive mechanical cooling or result in uncomfortable high air flow velocities, failing to provide a pleasant indoor environment by maintaining a stable temperature without drafts.
Innovation Solution
A ceiling disperser with a movable pipe mechanism, utilizing a step motor for vertical movement, delivers supply air in pulses, alternating between higher and lower flow rates at regular intervals to mimic the findings of Hans Wigö's doctoral thesis, ensuring a pleasant cooling effect without mechanical cooling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If additional uncooled air flow is supplied to the room, then the thermal load is compensated, but the air flow velocities become too high causing discomfort and continuous draft
Solution Approach 1:
The ceiling disperser implements periodic action by alternating between high volume air flow and standard air flow at regular intervals. The pipe moves vertically to switch between these modes, creating pulsating air flow that provides thermal compensation while avoiding continuous high velocity discomfort. The high volume flow lasts for a shorter duration (e.g., 5 minutes) followed by standard flow (e.g., 15 minutes), creating a rhythmic pattern that prevents sustained draft sensation.
Solution Approach 2:
The invention applies dynamics by making the pipe movable rather than fixed. The pipe can change its vertical position to alternately block or open flow paths, dynamically adjusting the air flow characteristics. This dynamic adjustment allows the system to switch between different operating modes (high volume vs. standard flow) based on the pulsating cycle, resolving the contradiction between providing sufficient cooling and maintaining comfortable air velocities.
2Temperature
If mechanical cooling is used to compensate thermal load, then the room temperature is maintained, but the installation cost and energy consumption increase
Solution Approach 1:
The system uses periodic high volume air flow pulses to compensate for thermal load instead of continuous mechanical cooling. By delivering abundant air flow intermittently (e.g., 5 minutes of high flow followed by 15 minutes of standard flow), the system achieves the same thermal compensation effect as mechanical cooling but with significantly reduced energy consumption and without requiring expensive cooling infrastructure.
3Temperature
If mechanical cooling is used to compensate thermal load, then the room temperature is maintained, but the installation cost increases
Solution Approach 1:
The invention replaces expensive mechanical cooling systems with a simple pulsating air flow mechanism. The ceiling disperser uses a movable pipe controlled by a step motor to create periodic high volume air flow, achieving thermal load compensation without requiring costly mechanical cooling equipment. This approach dramatically reduces installation cost while maintaining the same temperature control function.
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
The intermittent air flow distribution effectively maintains a comfortable indoor environment by providing pleasant cooling without drafts, reducing the need for mechanical cooling and minimizing energy consumption.
Implementation Method 1
the vertical movement of the pipe is implemented with a step motor
Implementation Method 2
supply air is arranged to flow for most of the time with a certain air volume... distribution of supply air can be implemented in pulses, i.e. at times more air, at times less
Data Source
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AI summary
A ceiling disperser for conducting supply air into an inside space of a building, more particularly into a room, wherein the supply air is arranged to flow for most of the time with a certain air volume, which ceiling disperser comprises a duct part (6), by means of which the ceiling disperser is connected to the supply air duct, a frame part (4), which surrounds the duct part, and also a front plate (1), which comprises apertures or nozzles (3) at least at the point of the duct part. The invention is implemented such that at the point of the duct part (6) a pipe (7) that is smaller in diameter than the duct part is installed partly inside the duct part, which smaller pipe can be moved in the vertical direction between a lower position and an upper position.