PCB Heating Mosquito Repellent with Independent Zones

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Solution Overview

Problem

Traditional mosquito repellent devices have a single working mode and fail to adapt to various use scenarios, resulting in poor effectiveness and user experience.

Innovation Solution

A PCB wiring heating type mosquito repellent device that integrates ultrasonic mosquito repelling and mosquito repelling with an electric mosquito repellent mat, featuring independently working heating sheets, a fan for odor emission expansion, and a rechargeable power supply module that automatically identifies and charges USB loads.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a single working mode is used in traditional mosquito repellent devices, then the device structure is simple, but the device cannot adapt to various use scenarios resulting in poor effectiveness

Engineering Contradiction:
Improveadaptability to various use scenariosVSAvoiddevice structure complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent implements multi-functionality by integrating both ultrasonic mosquito repelling and electric mosquito repellent mat heating functions into a single device. The control circuit can switch between different working modes (ultrasonic mode, heating mode, and combined mode) to adapt to various use scenarios, thereby improving versatility without requiring multiple separate devices

Inventive Principle:
Principle #6Universality (Multi-functionality)

Solution Approach 2:

The heating function is divided into multiple independently controllable heating sheets, each corresponding to a separate heating area on the PCB heating panel. This segmentation allows different heating areas to be independently activated based on the specific use scenario, providing flexibility while maintaining a unified device structure

Inventive Principle:
Principle #1Segmentation

2Reliability

If electric heating diffusion mode is used for mosquito repellent odor diffusion, then the device structure is simple, but the use effect is poor and user experience is poor

Engineering Contradiction:
Improvemosquito repelling effectivenessVSAvoidheating and diffusion system complexity
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The patent merges the ultrasonic emission module with the electric mosquito repellent mat heating system. The ultrasonic vibrations are transmitted through the heating sheets, which simultaneously serve as both heating elements and ultrasonic transmission media. This combination enhances mosquito repelling effectiveness by integrating two different repelling mechanisms into a unified system

Inventive Principle:
Principle #5Merging (Combining)

Solution Approach 2:

The control circuit dynamically adjusts the heating temperature and ultrasonic power parameters based on the selected working mode and environmental conditions. This parameter optimization ensures effective mosquito repelling while energy efficiency, improving reliability without requiring excessive system complexity

Inventive Principle:
Principle #35Parameter changes

3Adaptability or versatility

If multiple heating sheets are used that can work independently, then the device can adapt to different space scenarios, but the control system complexity increases

Engineering Contradiction:
Improveadaptation to different space scenariosVSAvoidcontrol system complexity
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The heating system is segmented into multiple independently controllable heating sheets, each with its own heating area on the PCB panel. The control circuit can selectively activate specific heating sheets based on the size and requirements of the space, providing adaptability without requiring a completely separate control system for each sheet

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The control system dynamically adjusts which heating sheets are activated and at what power levels based on the detected space size and user preferences. This dynamic control allows the system to adapt to different scenarios (small room, large room, localized area) while maintaining a unified control interface, managing complexity through intelligent automation

Inventive Principle:
Principle #15Dynamics

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

The device effectively adapts to different space scenarios by allowing independent or joint operation of heating sheets and ultrasonic functions, enhancing odor emission range and user convenience with automatic power management.

Implementation Method 1

A heating wire is evenly laid in each of the heating areas... Each of the heating wires is provided with a resistance adjusting structure for adjusting the length of the heating wire connected into a circuit, so as to adjust the temperature by adjusting the access length of the heating wire

Methodology Applied
Scientific EffectJoule heating: Joule Heating

Implementation Method 2

a fan for odor emission expansion

Methodology Applied
Scientific EffectForced convection: Forced Convection

Implementation Method 3

a rechargeable power supply module and an ultrasonic emission module are arranged in the base

Methodology Applied
Scientific EffectUltrasonic vibration: Ultrasonic Vibration

Data Source

PatentEP4344541B1PCB wiring heating type mosquito repellent device
Publication Date: 2025.05.21 LI WENJIE
  • EP4344541B1 patent drawingFigure 1
  • EP4344541B1 patent drawingFigure 2
  • EP4344541B1 patent drawingFigure 3

AI summary

Provided is a PCB wiring heating type mosquito repellent device, which integrates two functions of ultrasonic mosquito repelling and mosquito repelling with an electric mosquito repellent mat. Meantime, the mosquito repellent device is provided with a plurality of heating sheets which may work independently. One side of a PCB heating panel is provided with a plurality of heating areas, and each heating area corresponds to one of the heating sheets. One side face of the heating sheet is connected with the heating area, and the other side face of the heating sheet is connected with the electric mosquito repellent mat. A heating wire is evenly laid in each heating area, and the heating wires in adjacent heating areas are connected in parallel and may supply power and heat independently.