Variable Pressure Air Pump Dual Cylinder Switch
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Solution Overview
Problem
Existing air pumps face a trade-off between inflation efficiency and pressure, making it difficult to improve both simultaneously, and users struggle to conveniently operate the pump when connected to a tire due to the design.
Innovation Solution
A variable-pressure air pump design featuring a first and second cylinder with a plunger and piston device, a head assembly with a hose and valve adapter, and a discharge device with a switch that allows for adjustable air flow and pressure, enabling efficient inflation and high-pressure output while allowing for easier handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the cross-sectional area of cylinders is increased to improve inflation rate, then the inflation efficiency is improved, but the pressure output decreases
Solution Approach 1:
The air pump is divided into two separate cylinders: a first cylinder for high-volume air output to quickly inflate objects, and a second cylinder for high-pressure air output. This segmentation allows each cylinder to be optimized for its specific function, resolving the contradiction between inflation rate and pressure output
Solution Approach 2:
The system dynamically switches between two operational modes: a first mode where both cylinders move relative to each other to output high volume air for quick inflation, and a second mode where the second cylinder does not move relative to the first cylinder to output high-pressure air. This dynamic switching enables the system to adapt to different inflation requirements
2Productivity
If the pump is directly connected to a valve of a tire to be inflated, then the inflation function is achieved, but the user is unable to hold the head conveniently and operate the pump smoothly
Solution Approach 1:
A discharge device with a switch mechanism is introduced as an intermediary between the pump and the tire valve. The switch has flow guide portions and blocking portions that can be moved to control air flow, providing the user with convenient control over the inflation process while maintaining the connection to the tire valve
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 design enhances both inflation efficiency and pressure control, allowing for convenient operation by enabling quick inflation and high-pressure output while facilitating user-friendly handling.
Implementation Method 1
A plunger has a first end inserted in the first chamber and a second end inserted in the second chamber. The plunger defines a one-way flow passage fluidly connecting with the first and the second chambers.
Implementation Method 2
A piston device is configured to compress air in the first and the second chambers.
Implementation Method 3
The switch has at least one flow guide portion fluidly connecting with the outside of the variable-pressure air pump and at least one blocking portion configured to prevent air from flowing out of the at least one discharge hole.
Data Source
AI summary
A variable-pressure air pump includes a first cylinder with a first chamber and a second cylinder with a second chamber movably connected with one another. The second chamber fluidly communicable with the outside of the variable-pressure air pump selectively. A discharge device includes a connecting member and a switch movably connected with one another. The connecting member defines at least one discharge hole fluidly connecting with the second chamber. The switch has at least one flow guide portion and at least one blocking portion. The switch is movable between a first position in which the at least one flow guide portion is adjacent and opens to the at least one discharge hole and a second position in which the at least one blocking portion is adjacent to and blocks the at least one discharge hole.