Ventilation device for household appliances
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Solution Overview
Problem
Existing ventilation devices for household appliances face issues with cable clutter and interference, inconvenient installation due to dangling cables, and the need for time-consuming cable connection during assembly, which complicates pre-configuration of wiring.
Innovation Solution
A ventilation device with an integrated connector system that houses cables within the device, using an IDC or RAST 2.5 type connector to connect to the power and control system externally, reducing cable protrusion and allowing for pre-configuration of wiring during assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If cables are routed out of the fan frame to connect to the power and control system, then the fan can be powered and controlled, but the cables dangle inside the appliance causing clutter and interference with other devices
Solution Approach 1:
The connector is integrated into the fan frame structure, with the connector body forming part of the frame itself. The cables are routed through channels within the frame and terminate at the connector that is already embedded in the frame structure, eliminating the need for external cable routing and reducing cable clutter in the appliance interior.
Solution Approach 2:
The connector and frame are merged into a single integrated structure. The connector body is formed as an integral part of the frame, combining the structural support function of the frame with the electrical connection function of the connector, thereby eliminating separate cable management components and reducing overall complexity.
2Adaptability or versatility
If dedicated connection cables are used for each fan, then each fan can be individually powered and controlled, but the wiring assembly becomes time-consuming during manufacturing
Solution Approach 1:
The connector is pre-integrated into the frame during frame manufacturing, so that when the fan assembly is manufactured, the electrical connection infrastructure is already in place. This preliminary integration of the connector into the frame structure eliminates the need for separate cable routing and connection operations during final assembly, significantly reducing assembly time while maintaining individual fan control capability.
3Reliability
If cables run out of the frame to the power and control system, then the fan can be connected to power, but the connection process is complicated and inconvenient
Solution Approach 1:
The connector is nested within the frame structure, with the connector body forming part of the frame and the electrical contacts integrated into the frame. This nesting eliminates the need for external cable management and makes the electrical connection process simpler and more convenient during installation, while maintaining reliable electrical connection.
Data Source
Figure 1~3
AI summary
It is provided a ventilation device (1) for households appliances comprising a axial fan (2) including a frame (3) defining an closed internal wall (30) and a closed external wall (31) wrapped around a central axis (3a), an impeller (4) constrained in a compliant way to the frame (3) within the internal wall (30) and rotatable around the central axis (3a), a drive unit (5) integrally constrained to the frame (3), positioned at the central axis (3a), operatively connected to the impeller (4) and configured to rotate the impeller (4) in proportion to electrical signals, at least one electrical cable (6) connected to the unit (5), and an IDC type connector (7) positioned on the external wall (31), connected to at least the cable (6), facing outwards from the frame (3) and configured to be connected to an external power supply and control system of a household appliance.