Pre-compression Pump Segmented Piston Sealing
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Solution Overview
Problem
Existing pre-compression pumps suffer from inadequate spraying performance due to large pressure-bearing surface area and short piston displacement, leading to weak pressure output and linear or seeping liquid distribution, which is insufficient for effective atomization.
Innovation Solution
The design incorporates a second piston and spring within the first piston assembly, creating a variable pressure chamber that allows for increased piston displacement and pressure output, reducing the overall height of the pump while preventing liquid seepage through a pushing needle mechanism and elastic expanding portions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the pressure-bearing surface area of the piston is increased to improve sealing, then liquid leakage is prevented, but the piston displacement becomes shorter and the pressure output becomes weaker
Solution Approach 1:
The piston system is divided into two separate pistons: a first piston with a larger pressure-bearing surface area for sealing, and a second piston with a smaller pressure-bearing surface area for generating high pressure output. This segmentation allows each piston to optimize its function independently, resolving the contradiction between sealing reliability and pressure output.
Solution Approach 2:
A variable pressure chamber is introduced as an intermediary between the first and second pistons. The first piston generates pressure in this chamber, which then acts on the second piston to produce the final high-pressure output. This intermediary mechanism allows the system to achieve both good sealing and high pressure output by decoupling the two functions.
2Device complexity
If a single piston design is used to simplify the structure, then the device complexity is reduced, but the spraying effect is insufficient and liquid seepage occurs
Solution Approach 1:
The single piston is segmented into two functional pistons with different roles. The first piston assembly handles sealing and pressure generation, while the second piston handles precision pressure control and spray activation. This segmentation improves spraying performance and prevents seepage while maintaining reasonable structural complexity.
Solution Approach 2:
The second piston is nested within the first piston assembly, with the second piston moving inside the variable pressure chamber created by the first piston. This nested configuration allows both pistons to cooperate in a compact arrangement, achieving improved spraying performance without excessive structural complexity.
3Power
If the piston displacement is increased to improve pressure output, then the pressure bearing surface area must be reduced, but this causes liquid seepage
Solution Approach 1:
The system segments the pressure generation function into two stages: the first piston with large surface area provides sealing and initial pressure, while the second piston with small surface area provides large displacement for high pressure output. This segmentation resolves the contradiction by allowing each piston to have optimized dimensions for its specific function.
Solution Approach 2:
The variable pressure chamber acts as a hydraulic intermediary, transmitting pressure from the first piston to the second piston. This hydraulic mechanism allows the system to multiply pressure effectively while maintaining sealing integrity, as the pressure is transmitted through the liquid medium rather than requiring direct mechanical connection.
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
This configuration enhances the spraying effect by ensuring a stronger pressure output and preventing seepage, resulting in a more efficient and compact pre-compression pump with improved performance.
Implementation Method 1
a first spring provided between the main body and the spring retainer... a second spring provided between the spring retainer and the second piston
Implementation Method 2
an outer edge of the bottom portion of the first piston expands outwards to form a lower elastic expanding portion configured to seal the water storage chamber... an outer edge of the top portion of the first piston extends outwards to form an upper elastic expanding portion
Data Source
Figure 1
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AI summary
The present invention provides a pre-compression pump with reduced height and prevent liquid seepage and a container having the same. The pre-compression pump includes a main body, a first piston assembly movably mounted in the main body, a pressing head assembly provided on a top portion of the first piston assembly, a second piston movably mounted in the first piston assembly, and a second spring provided between the second piston and the first piston assembly. A water storage chamber is provided between the main body and the first piston assembly, and a water outlet channel is provided in the first piston assembly. The pressing head assembly includes a nozzle, and the water outlet channel is in communication with the water storage chamber and the nozzle. The second piston includes a pushing needle portion configured to close the water outlet channel.