Damper Opening Device Circumferential Rack Reduces Pressure Loss
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Solution Overview
Problem
Existing damper opening and closing devices for fluid passages suffer from high pressure loss due to the central placement of operating parts, which obstructs airflow and increases energy consumption.
Innovation Solution
A damper opening and closing device with a configuration where dampers are arranged circumferentially, allowing for adjustable tilt angles to control fluid flow, eliminating the need for central operating parts and optimizing airflow by positioning inner and outer peripheral edges to minimize pressure loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the operating part and rack part are concentrated in the axial center of the fluid passage, then the damper can be operated to open and close the fluid passage, but the pressure loss of the fluid flowing through the fluid passage increases
Solution Approach 1:
The invention extracts the operating part from the axial center of the fluid passage and relocates it to the outer periphery. The operating part is now positioned at the outer peripheral edge of the inner cylinder, allowing the rack part to extend along the outer peripheral surface rather than occupying the central flow path. This extraction eliminates the obstruction to fluid flow while maintaining the mechanical operation functionality.
Solution Approach 2:
The invention transitions the operating mechanism from a radial arrangement (where the rack extends radially from the center) to a circumferential arrangement (where the rack extends along the outer peripheral surface in the circumferential direction). This dimensional change moves the operating components from the flow path center to the periphery, allowing fluid to flow through the center unobstructed while the operating mechanism functions along the outer circumference.
2Ease of operation
If the operating part is disposed in the center of the fluid passage, then the louver can be opened and closed by operating the operating part, but it is difficult to blow out a sufficient amount of air
Solution Approach 1:
The operating part is extracted from the central region of the fluid passage and repositioned at the outer periphery. This removes the mechanical components from the main airflow path, allowing air to be blown out freely through the center without obstruction from operating parts, guide bodies, or rectification parts.
Solution Approach 2:
The operating mechanism is relocated from the central axial dimension to the outer circumferential dimension. The rack part now extends in the circumferential direction along the outer peripheral surface, allowing the louver to be operated while the central flow passage remains clear for maximum air flow productivity.
3Device complexity
If the damper is arranged with inner peripheral edges opposed to each other in the circumferential direction, then the configuration is compact, but the visibility of the damper when closed increases
Solution Approach 1:
The invention employs asymmetric positioning of the damper, placing it偏心 (eccentrically) relative to the inner cylinder rather than symmetrically at the center. The damper's inner peripheral edge is positioned closer to the center, while the outer peripheral edge extends toward the outer peripheral surface. This asymmetric arrangement allows the damper to be compact when closed while minimizing visibility from the front view.
Solution Approach 2:
The damper is designed with different edge characteristics: the inner peripheral edge is positioned to provide compact closure, while the outer peripheral edge is positioned to minimize visibility when closed. This local differentiation of edge positions allows the damper to simultaneously achieve compact configuration and reduced visibility when closed, depending on which edge is more prominent from the viewing angle.
Data Source
AI summary
A damper opening and closing device includes an outer cylinder, an inner cylinder that is disposed inside the outer cylinder, is supported movably relative to the outer cylinder and has a fluid passage therein, and a damper group that includes a plurality of dampers disposed in the fluid passage so that the fluid passage is openable and closable. The plurality of dampers are arranged in a circumferential direction of the fluid passage and disposed in the fluid passage in such a way that inner peripheral edges of the dampers are opposed to each other. The damper opening and closing device further includes an angle control unit configured to control the tilt angle of the damper in conjunction with movement of the inner cylinder relative to the outer cylinder.