Ventilating Fan Power Supply Case for Easier Wire Connection
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Solution Overview
Problem
Existing ventilating fans face challenges in connecting external electric wires due to limited space and poor operability, as the thick and hard VVF cables require short reserved lengths, making the connection process cumbersome and inefficient.
Innovation Solution
The ventilating fan design includes a ventilating fan mounting member with a two-segment cylinder and a power supply case that allows for external terminal connection from the indoor side, eliminating the need for adjusting wire lengths and ensuring easy mounting by using a power supply case that projects outside the cylinder, facilitating simple and reliable electrical connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the external electric wire is received in the limited space surrounding the flange and protrusion, then the wire can be completely contained in the body, but the operability of connection and receiving the electric wire becomes poor due to the thick and hard VVF cable
Solution Approach 1:
The patent introduces a power supply case that extends in a direction perpendicular to the flange plane, creating additional spatial dimension for wire reception and connection operations. This allows the electric wire to be received in the power supply case rather than being constrained within the limited flange area, thereby improving operability while maintaining compact overall structure.
2Length of moving object
If the reserved length of the external electric wire is made as short as possible, then the wire can be completely received in the body, but the connection operation becomes more difficult due to the thick and hard cable
Solution Approach 1:
The power supply case is designed to protrude from the body in advance, creating a preliminary reception space for the electric wire before final connection. This allows the wire to be partially received and positioned in the power supply case prior to complete installation, making the connection operation easier even with short reserved length and thick hard cable.
3Reliability
If the power supply wire passes through the ventilation path, then electrical connection is achieved, but ventilation performance is affected
Solution Approach 1:
The patent separates the power supply function from the ventilation function by providing a dedicated power supply case distinct from the wind tunnel ventilation path. The power supply wire is received in the power supply case rather than passing through the ventilation path, thereby maintaining both reliable electrical connection and optimal ventilation performance without interference between the two functions.
Data Source
AI summary
A ventilating fan comprises a ventilating fan body, a ventilating fan mounting member, and a power supply case. A power supply wire disposed in the ventilating fan body to be connected to a blower is provided with an internal terminal at a leading end of the power supply wire. The power supply case projects from the power supply opening to be located outside the cylinder of the ventilating fan mounting member, and is fixed to the ventilating fan mounting member from the indoor side. An external terminal is mounted on an indoor side of the power supply case. An external electric wire for supplying electric power to the ventilating fan is connected with the external terminal in the power supply case, and the internal terminal is connected with the external terminal, so that the connection operation becomes simpler.