Damper-Integrated Blower Vane Module for Improved Airtightness
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Solution Overview
Problem
Conventional damper blowers for compact and slim type heat recovery ventilators face issues with airtightness due to accumulation of foreign materials and dust on gaskets, noise generation from air flow resistance, complex design, and high manufacturing costs, especially when applied to window or window frame installations.
Innovation Solution
A damper-integrated blower with a blower fan embedded in a shaft center and an exhaust port featuring a vane module made of fluorocarbon resin, integrated with a rubber gasket and a compact damper motor, which reduces the number of parts and simplifies the design, enhancing airtightness and reducing noise and manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple vanes are laid on each other to form a damper module, then the damper can block air flow, but airtightness deteriorates due to dust accumulation on gaskets between vanes
Solution Approach 1:
The patent extracts the gasket component from between multiple vanes and replaces it with a single vane that has an integrated elastic sealing edge. This eliminates the complex multi-vane structure with interlayer gaskets that accumulate dust, while maintaining the air blocking function through the single vane's sealing edge that contacts the housing directly.
Solution Approach 2:
The vane is constructed using composite materials, specifically a rigid body portion for structural support and an elastic sealing edge portion for airtight sealing. This combination allows the vane to maintain both mechanical strength and sealing capability, achieving reliable air blocking without requiring multiple vanes with gaskets.
2Ease of operation
If multiple vanes with gaskets are used, then air flow can be controlled, but noise increases due to air flow resistance
Solution Approach 1:
The patent removes the intermediate gaskets between multiple vanes, replacing them with a single vane structure. This reduces air flow resistance by eliminating the complex multi-layer vane arrangement, thereby reducing noise generation while maintaining air flow control capability through the single vane's rotation.
3Ease of operation
If vane rotary shafts and connection rods are inserted from exterior, then damper operation is achieved, but appearance complexity increases
Solution Approach 1:
The patent merges the vane rotary shaft with the damper motor shaft, eliminating the need for separate connection rods and external shaft insertions. The integration of these components simplifies the overall structure and improves outer appearance by removing protruding elements from the housing exterior.
4Reliability
If conventional damper module with multiple parts is used, then air blocking is achieved, but manufacturing cost increases
Solution Approach 1:
The patent combines multiple separate components (multiple vanes, gaskets, connection rods, and housing parts) into a single integrated vane module. This reduction in part count directly lowers manufacturing costs by reducing material usage, assembly steps, and quality control requirements, while maintaining reliable air blocking function.
Data Source
AI summary
The present invention relates to a damper-integrated blower having improved airtightness, which comprises a blower casing a having a suction port and a blower casing b fastened to the casing a from the opposite side; a vane stopper protrusion is formed on bottom surface of the exhaust port, and a vane contact housing part is formed above the exhaust port; damper motor screw fixing parts integrally protrude from the outer upper surface of the vane contact housing part of the blower casing a; a damper motor shaft hole is bored in a damper motor shaft hole protrusion part which is integrally formed on the outer upper side of the vane contact housing part of the blower casing a; a vane rotation shaft protrudes from the inner surface of a damper motor shaft hole protrusion part of the blower casing b facing the damper motor shaft hole protrusion part; an eccentric damper motor shaft of a damper motor is introduced into the damper motor shaft hole so as to connect with the blower casing a; a vane as a single member is connected to the damper motor shaft and the vane rotation shaft so as to open and close the exhaust port; and a gasket is coupled to the four edges of the vane providing a vane module.