Air Compressor Auxiliary Chamber Pressure Limiting
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Solution Overview
Problem
Conventional air compressors often exceed safety pressure when inflating tires, leading to potential blowouts due to mechanical safety valve failure over time.
Innovation Solution
An air compressor design featuring an electrically operated compressor unit with a piston-driven cylinder and an auxiliary air chamber within a tube that communicates with the cylinder but not the air storage container, allowing compressed air to flow into the auxiliary chamber at top dead center, preventing pressure exceedance without a mechanical safety valve.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical safety valve is installed to prevent over-inflation, then safety is improved, but the device complexity increases and the valve may become stuck over time
Solution Approach 1:
The patent removes the mechanical safety valve from the system entirely and replaces it with an auxiliary air chamber that passively limits pressure through its volume and communication path, thereby reducing device complexity while maintaining safety
Solution Approach 2:
The auxiliary air chamber acts as an intermediary between the cylinder and the air storage container, providing a pressure-limiting function without requiring a mechanical valve that can fail or become stuck
2Reliability
If a mechanical safety valve is used to release excess air, then pressure control is improved, but the valve may fail after extended use
Solution Approach 1:
The auxiliary air chamber provides automatic pressure regulation without moving parts that can fail, using the natural compression and expansion of air within the chamber to maintain safe pressure levels indefinitely
Solution Approach 2:
The auxiliary air chamber pre-establishes a pressure buffer zone that prevents pressure from exceeding safe levels in the first place, rather than reacting to over-pressure conditions after they occur
3Productivity
If all compressed air enters the air storage container at top dead center, then air transfer efficiency is improved, but the piston experiences harsh impact and pressure may exceed safety limits
Solution Approach 1:
The patent segments the air transfer path by introducing an auxiliary air chamber as an intermediate buffer, allowing compressed air to be gradually transferred to the air storage container rather than all at once, thereby reducing piston impact while maintaining transfer efficiency
Solution Approach 2:
The auxiliary air chamber provides a cushioning effect by accepting compressed air during the compression stroke and releasing it gradually, preventing harsh piston impact and pressure spikes before they can cause damage
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 ensures air supply remains below safety pressure, reducing the risk of tire blowouts and allowing smoother piston strokes, while also lowering manufacturing costs by eliminating the need for a mechanical safety valve.
Implementation Method 1
a motor drives a piston body to conduct reciprocating motion in a cylinder to produce compressed air
Implementation Method 2
when the piston body reaches top dead center, the head of the piston body almost contacts the top wall of the cylinder, whereby part of the compressed air produced in the cylinder may flow into the auxiliary air chamber
Data Source
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AI summary
An air compressor is disclosed, which provides compressed air having a pressure less than a safety pressure without using a safety valve, so that a tire can be inflated without exceeding a safety pressure thereof. One feature of the air compressor is that a tube is formed integrally with the air storage container and on the cylinder, wherein the tube defines therein an auxiliary air chamber communicating with the inner space of the cylinder but not communicating with the air storage container. When the piston body reaches top dead center, the head of the piston body almost contacts the top wall of the cylinder, whereby part of the compressed air may flow into the auxiliary air chamber, so that the piston body can conduct downward strokes more smoothly, and the compressed air can be prevented from exceeding a safety pressure set for an object to be inflated.