Cam-Driven Puffer Assembly for Consistent Pheromone Dispensing
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Solution Overview
Problem
Existing puffer devices for agricultural pest control lack efficient mechanisms for dispensing pheromones with consistent and controlled operation, often requiring complex programming and prone to mechanical failures.
Innovation Solution
A puffer device with a gear train assembly and motor-driven plunger system that includes a cam mechanism to control the dispensing of pheromones from an aerosol can, ensuring consistent and controlled dispensing with a sealed chamber to prevent residue leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a motor-driven gear train assembly is used to control plunger movement, then dispensing consistency and control are improved, but device complexity increases
Solution Approach 1:
The device is divided into distinct functional modules: a sealed upper chamber containing the motor and gear train assembly, and a lower chamber for the aerosol can. This segmentation isolates complex mechanical components in a protected environment while simplifying the overall system architecture and maintenance.
Solution Approach 2:
A cam mechanism acts as an intermediary between the motor-driven gear train and the plunger. The cam converts rotational motion from the gears into controlled linear motion of the plunger, providing precise dispensing control while decoupling the motor control system from direct plunger actuation.
2Productivity
If the motor runs continuously to drive the plunger, then dispensing speed increases, but mechanical stress on the motor increases
Solution Approach 1:
The cam mechanism is designed to engage the plunger periodically during motor rotation rather than requiring continuous motor operation. This periodic engagement provides sufficient dispensing speed while allowing the motor to operate intermittently, reducing mechanical stress and extending motor lifespan.
3Ease of operation
If the cabinet is opened for maintenance or refilling, then accessibility is improved, but contamination risk increases
Solution Approach 1:
The aerosol can assembly is designed as a removable component that can be extracted from the lower chamber without opening the sealed upper chamber containing the motor and electronics. This allows refilling and maintenance while preserving the sealed environment of the critical mechanical components.
Solution Approach 2:
The aerosol can is nested within the lower chamber, which is part of the cabinet structure. This nested arrangement allows the can to be accessed and replaced independently while the upper chamber remains sealed, protecting internal components from contamination during maintenance operations.
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 provides reliable and consistent pheromone dispensing with reduced mechanical stress on the motor, extending its lifespan and maintaining a sealed environment to prevent contamination, thus enhancing operational efficiency and reliability.
Implementation Method 1
The gear train assembly includes a motor and a gear driven by the motor
Implementation Method 2
A cam is coupled to the gear. The cabinet further includes a plunger configured to be contacted and driven by the cam
Implementation Method 3
an aerosol can assembly configured to be releasably coupled to the cabinet, wherein movement of the plunger is configured to dispense a material from the aerosol can assembly
Data Source
Figure 1
Figure 2
Figure 3A~3F
AI summary
A puffer device includes a cabinet having a printed circuit board and a gear train assembly coupled to the printed circuit board. The gear train assembly includes a motor and a gear driven by the motor. A cam is coupled to the gear. The cabinet further includes a plunger configured to be contacted and driven by the cam. The puffer device further includes an aerosol can assembly configured to be releasably coupled to the cabinet, wherein movement of the plunger is configured to dispense a material from the aerosol can assembly.