Handheld Airless Sprayer Valve Buffering for Uniform Spray Pressure
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Solution Overview
Problem
The spray effect of handheld airless sprayers is adversely affected by piston movement frequency, leading to inconsistent spraying at low frequencies.
Innovation Solution
A handheld airless sprayer design featuring a buffer chamber in the liquid outlet valve, pre-pressurizing liquid before spraying, with a valve mechanism that opens at a preset pressure, and a pressure relief system to manage excessive pressure, enhancing spray consistency and quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If piston movement frequency is reduced, then energy consumption decreases, but spray consistency deteriorates
Solution Approach 1:
The buffer chamber pre-pressurizes liquid before it reaches the nozzle, so that even when piston movement frequency is low, the liquid is already pressurized and ready for consistent spraying. This preliminary pressurization action ensures spray consistency without requiring high-frequency piston movement, thus reducing energy consumption.
Solution Approach 2:
The buffer chamber acts as an intermediary between the piston pump body and the nozzle. It receives pressurized liquid from the pump and maintains consistent pressure before delivering it to the nozzle, decoupling the piston movement frequency from the spray output consistency. This allows low-frequency operation while maintaining spray quality.
2Reliability
If piston movement frequency is increased, then spray consistency improves, but energy consumption increases
Solution Approach 1:
The buffer chamber performs preliminary pressurization of the liquid, so the piston pump body does not need to operate at high frequency to maintain spray consistency. The liquid is pressurized in advance in the buffer chamber, allowing the system to achieve consistent spray output with lower energy consumption.
3Reliability
If buffer chamber volume is increased, then spray consistency improves, but device size increases
Solution Approach 1:
The buffer chamber is integrated into the liquid outlet valve body, combining two functions (valve operation and liquid buffering) into a single component. This merging eliminates the need for a separate buffer chamber, maintaining spray consistency while avoiding additional device size increase.
Solution Approach 2:
The buffer chamber is nested within the liquid outlet valve body structure. The valve seat, valve head, and spring are arranged inside the valve body which contains the buffer chamber, creating a nested configuration that maximizes space utilization and minimizes overall device size while maintaining adequate buffer volume.
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 maintains uniform liquid pressure during spraying, reduces material costs, facilitates easy cleaning, and prevents overheating, thereby improving spray quality and user convenience.
Implementation Method 1
the valve body being provided with a buffer chamber, the valve seat, the valve head, and a spring being arranged in the valve body; the spring acts on the valve head to bias the valve head towards a direction of closing the liquid outlet hole
Implementation Method 2
a handheld airless sprayer, also called a handheld high-pressure airless paint sprayer, is a spray gun powered by a battery pack to spray a paint or coating pressurized by a high-pressure piston pump body
Implementation Method 3
the valve head is opened when a liquid pressure in the buffer chamber exceeds a preset liquid outlet pressure, whereby the liquid in the buffer chamber flows through the liquid outlet hole and is sprayed out of the nozzle
Data Source
AI summary
A handheld airless sprayer prevents a spray effect affected by piston movement frequency. The handheld airless sprayer includes a casing, liquid cup, nozzle, pump body, actuation mechanism, and liquid outlet valve, the nozzle located at the casing front end, the pump body including a pump chamber, a pump chamber liquid inlet end connects to the liquid cup, a pump chamber liquid outlet end connects to the liquid outlet valve, which includes a valve body with buffer chamber, and valve seat, valve head, and spring in the valve body; a liquid outlet hole communicates with the valve seat nozzle; the valve body spring closes the liquid outlet hole; the pump body draws liquid from the liquid cup into the buffer chamber; and the valve head opens when buffer chamber liquid pressure exceeds a preset pressure, whereby the buffer chamber liquid flows through the liquid outlet hole to spray from the nozzle.