Thermally Actuated Air Diffuser With Adjustable Pivot Limits
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Solution Overview
Problem
Existing air diffusers require manual or complex motor-driven mechanisms for temperature-dependent air orientation, leading to inefficiencies, precision issues, and increased maintenance needs, especially in large spaces where frequent adjustments are necessary between seasons.
Innovation Solution
An automatically orientable air diffuser with a pivoting inner body and a heat-expandable element that adjusts direction based on temperature, featuring a second spring to absorb stresses and a mechanical stop for adjustable pivoting travel, ensuring precise operation and prolonged life.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If manual or motor-driven mechanisms are used for air orientation adjustment, then the air direction can be changed according to temperature, but the device complexity increases and maintenance needs increase
Solution Approach 1:
The patent employs a heat-expandable element that automatically expands when exposed to hot air, directly pushing the articulating lever to reorient the air outlet downward. This eliminates the need for manual adjustment mechanisms or motor-driven systems, achieving temperature-dependent adaptation through a simple thermal expansion principle while maintaining device simplicity
Solution Approach 2:
The diffuser performs self-adjustment by using the thermal energy of the discharged air itself to drive the reorientation mechanism. The heat-expandable element acts as a self-powered actuator that automatically responds to temperature changes without requiring external control systems, power sources, or manual intervention
2Adaptability or versatility
If manual adjustment mechanisms are used, then air orientation can be changed, but precision and positioning accuracy deteriorate
Solution Approach 1:
The direct coupling of the heat-expandable element to the articulating lever ensures that thermal expansion translates immediately and precisely into angular displacement of the air outlet. This direct mechanical coupling eliminates positioning errors associated with manual adjustment, providing precise and repeatable orientation changes based solely on temperature conditions
Solution Approach 2:
The patent replaces imprecise manual mechanical adjustment with a thermally-driven mechanical system that provides automatic, precise positioning. The heat-expandable element acts as a controlled actuator that eliminates human error in positioning while maintaining simple mechanical operation
3Extent of automation
If heat-expandable element continuously pushes the lever, then automatic orientation is achieved, but stresses and breakages increase
Solution Approach 1:
The patent incorporates a second spring positioned to engage when the heat-expandable element reaches its full expansion position. This second spring acts as a cushioning element that absorbs excess thermal expansion forces, preventing stress concentration and potential breakage of the heat-expandable element or connected components while maintaining reliable automatic operation
Solution Approach 2:
The system transitions from a static rigid connection to a dynamic system with compliant elements. The first and second springs provide elastic compliance that allows the mechanism to absorb and dissipate thermal stresses dynamically, preventing rigid stress concentration and improving overall system reliability under varying temperature conditions
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 solution allows for efficient, precise, and automatic air direction adjustment based on temperature, reducing maintenance needs and preventing breakages, while enabling precise operation and extended operational life.
Implementation Method 1
the discharge air passes over a heat-expandable element so that with the increase of the temperature the expansion of said element is caused
Implementation Method 2
the rest position of said inner body corresponds to an upward orientation as a result of the action of a first retraction spring acting on an articulated lever in said orientable inner body
Implementation Method 3
it has been provided that the mentioned heat-expandable element is assembled in a support such that it is maintained in its operational position as a result of the action of a second spring, such that when the pivoting body reaches the end limit of its travel, the reaction caused on the pushing element causes this second spring to be compressed and thus absorb the dimensional difference caused by the excessive expansion of the heat-expandable element
Data Source
Figure 1~3
Figure 4~5
AI summary
The invention relates to an automatically orientable air diffuser according to the discharge temperature, such that a blast of hot air is directed towards lower positions of the enclosure to be conditioned and a blast of cold air is directed towards upper positions of said enclosure, as a result of the pivoting with respect to a transverse horizontal axis of an inner body (2) or diffuser nozzle pushed by a lever pushed by a heat-expandable body. The outer casing (1) includes a pivoting movement-limiting element in the form of an angle bracket, one of the branches of which forms a stop element (10) for the pivoting inner body (2), whereas the heat-expandable element is assembled in a unit pushed by a spring (17) and can move backwards against the action of said spring (17) when it continues to push against the pivoting inner body (2) after the latter has reached the end of its travel. The assembly includes marks (14) which allow adjusting the pivoting amplitude.