Fan Temperature Sensor Fixation via Extension Member
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Solution Overview
Problem
Conventional fans with temperature sensors in vehicle air-conditioning systems face issues where the sensor's insecure fixation leads to vibration-induced position changes, potentially causing collisions with the impeller, damaging the sensor and affecting detection accuracy and sensitivity.
Innovation Solution
A fan design featuring a temperature sensor fixed via an extension member at the air inlet or outlet, with a restricting portion preventing contact with the impeller, ensuring the sensor's surface is exposed to ambient air and maintaining detection accuracy and sensitivity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the temperature sensor is fixed using only a lead wire unit, then the structure is simple, but the sensor cannot be securely fixed and may collide with the impeller due to vibration
Solution Approach 1:
The fixation structure is divided into two independent parts: a lead wire unit for electrical connection and a supporting structure (claw-shaped extension) for mechanical support. This segmentation allows each component to perform its specific function optimally - the lead wire provides electrical connectivity while the supporting structure provides stable mechanical fixation, preventing sensor collision with the impeller
Solution Approach 2:
The supporting structure acts as an intermediary between the temperature sensor and the fan frame. It provides a stable mounting platform for the sensor while isolating it from direct contact with moving parts like the impeller. The claw-shaped design with multiple contact points creates a buffer zone that prevents vibration-induced collisions
2Reliability
If the temperature sensor is supported by wire carriers and a supporting portion, then the sensor shaking is prevented, but the sensor face contacts the support which blocks ambient air and reduces detection accuracy
Solution Approach 1:
The supporting structure is designed with localized support points (claw-shaped extensions) that provide mechanical stability only at specific locations. The sensor body remains exposed to ambient air flow, ensuring accurate temperature detection. The support structure contacts only the rear or side portions of the sensor, leaving the detection face completely open to the environment
Solution Approach 2:
The support structure extends from the fan frame in a direction perpendicular to the sensor's detection face. This spatial arrangement allows the sensor to be mechanically supported from behind while its front face remains unobstructed for optimal air flow and temperature sensing. The supporting portions protrude radially to provide support without blocking the sensor's line of sight to ambient air
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
Prevents collisions between the temperature sensor and impeller, ensuring accurate and sensitive temperature detection while allowing ambient air to reach the sensor, thus maintaining the normal operation of the air-conditioning system.
Implementation Method 1
The temperature sensor 2 is arranged at one of the air inlet 11 and the air outlet 12 via the extension member 3 in a position where the surface of the temperature sensor 2 is fully exposed to the ambient air
Implementation Method 2
the surface of the temperature sensor 2 is fully exposed to the ambient air
Data Source
Figure 1
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AI summary
A fan having a temperature detecting function includes a fan frame (1), an extension member (3), a temperature sensor (2) and a restricting portion (5). The fan frame (1) has an air inlet (11), an air outlet (12), and an impeller (13) rotatably arranged between the air inlet (11) and the air outlet (12). The extension member (3) has one end adjacent to the fan frame (1). The temperature sensor (2) is arranged at one of the air inlet (11) and the air outlet (12) via the extension member (3) in a position where the surface of the temperature sensor (2) is fully exposed to the ambient air. The restricting portion (5) is arranged at the one of the air inlet (11) or the air outlet (12). The restricting portion (5) is located between the extension member (3) and the impeller (13) and is adapted to prevent the extension member (3) from making contact with the impeller (13).