Formaldehyde detecting apparatus, and air treatment apparatus having the same
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Solution Overview
Problem
Conventional formaldehyde sensors in air treatment devices produce nonlinear output signals due to external vibrations and voltage fluctuations, leading to inaccurate measurements of formaldehyde concentration.
Innovation Solution
A formaldehyde detecting apparatus with a fixing member to stabilize the sensor on a printed circuit board and a power supply with a regulator to stabilize the voltage, ensuring a linear and accurate signal output, combined with an air treatment apparatus that displays the concentration numerically and alerts users through sound or color.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the formaldehyde sensor is mounted on the printed circuit board without a fixing member, then the device complexity is reduced, but the sensor oscillates due to external vibration causing nonlinear output signals
Solution Approach 1:
The fixing member is divided into a base portion that contacts the sensor and a fastening portion that secures the base to the PCB, creating separate functional zones that effectively constrain the sensor while maintaining simple overall structure
Solution Approach 2:
The fixing member is pre-installed on the printed circuit board before the sensor is mounted, establishing a stable mounting structure in advance that prevents vibration-induced oscillation from the beginning
2Use of energy by moving object
If conventional power supply is used without voltage stabilization, then the power consumption is reduced, but the output signal becomes nonlinear due to voltage fluctuations
Solution Approach 1:
The regulator dynamically adjusts and stabilizes the voltage parameter supplied to the signal processor, maintaining constant operating conditions that ensure linear output signals while managing power consumption efficiently
3Ease of manufacture
If the formaldehyde sensor is loosely mounted, then the ease of manufacture is improved, but the sensor oscillates with respect to the printed circuit board causing inaccurate measurements
Solution Approach 1:
The oscillation problem is extracted and isolated by introducing a dedicated fixing member that specifically addresses the vibration issue without complicating the overall manufacturing process or sensor mounting procedure
Data Source
AI summary
A formaldehyde detecting apparatus includes a formaldehyde sensor configured to measure concentration of formaldehyde in air; a printed circuit board on which the formaldehyde sensor is disposed, the printed circuit board including a signal processor configured to process a signal output from the formaldehyde sensor; a fixing member disposed on the printed circuit board, the fixing member configured to fix the formaldehyde sensor, wherein the fixing member prevents the formaldehyde sensor from oscillating with respect to the printed circuit board by external vibration; and a power supply configured to supply a voltage capable of stabilizing an output signal to the signal processor.