Trigger Sprayer Check-Valve Layout for Reliable Cylinder Decompression
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Solution Overview
Problem
Existing trigger type liquid ejectors face issues with insufficient decompression in the main cylinder, leading to inefficiencies and potential injection errors.
Innovation Solution
The design incorporates a main piston that moves forward and rearward within a main cylinder, coupled with check valves to control communication between the main cylinder, vertical supply pipe, and reservoir cylinder, ensuring reliable decompression and efficient liquid transfer, including a communication path for air discharge during priming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of stationary object
If a pump is used to pressurize and deliver liquid, then liquid can be delivered at a distance, but the device becomes more complex and requires additional power source
Solution Approach 1:
The patent removes the pump and power source from the sprayer system, extracting the pressurization function entirely. Instead, liquid pressure is generated by the user's manual operation of the trigger mechanism, which actuates a piston or diaphragm to pressurize liquid on-demand in the delivery line.
Solution Approach 2:
The sprayer system performs self-service by using the user's manual trigger activation to directly generate the necessary liquid pressure through a simple piston or diaphragm mechanism. This eliminates the need for external power sources and complex pump systems, as the user's action itself provides the pressurization force.
2Stress or pressure
If a pump system is used, then liquid can be pressurized for delivery, but the device requires a power source and becomes harder to operate
Solution Approach 1:
The system uses the user's manual trigger operation to directly drive a piston or diaphragm that pressurizes the liquid. This self-service approach eliminates power sources and complex controls, making the device simpler to operate while still achieving the necessary liquid pressure for effective spraying.
Solution Approach 2:
The patent extracts the pump and power source from the system, replacing them with a simple manual pressurization mechanism. This reduces operational complexity while maintaining the ability to generate sufficient liquid pressure through direct user action on the trigger mechanism.
3Device complexity
If manual pressure application is used, then the device is simpler, but liquid cannot be delivered at a distance
Solution Approach 1:
The patent employs hydraulic principles by using a piston or diaphragm to directly pressurize liquid in the delivery line through manual trigger operation. This simple hydraulic mechanism generates sufficient pressure to deliver liquid at a distance while keeping the device structure simple and avoiding complex pump systems.
4Ease of operation
If a trigger mechanism is used, then operation is more precise, but the structure becomes more complex
Solution Approach 1:
The patent merges the trigger mechanism with the pressurization function by directly coupling the trigger actuation to a piston or diaphragm in the delivery line. This integration achieves precise operational control while minimizing structural complexity, as the single trigger action simultaneously controls both the timing and pressure generation for liquid delivery.
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 design achieves reliable decompression of the main cylinder, reduces the need for repeated priming, minimizes injection errors, and ensures consistent and high-quality liquid injection performance.
Implementation Method 1
a spring positioned to bias the trigger assembly towards the first position
Implementation Method 2
liquid flows from the reservoir through the delivery line to the nozzle
Data Source
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AI summary
A trigger type liquid ejector (1) includes an ejector main body (2) having a vertical supply pipe (10), an ejection barrel (11) and a trigger mechanism (50), the trigger mechanism has a main piston (52) configured to move in conjunction with movement of a trigger (51) and a main cylinder (53) configured to accommodate the main piston, the ejector main body includes a reservoir cylinder (90) into which the liquid passing through the inside of the vertical supply pipe is supplied, a reservoir plunger (110) moving according to supply of the liquid into the reservoir cylinder, a first check valve (36) configured to block communication between an inside of a container body (A) and the inside of the vertical supply pipe when the inside of the main cylinder is pressurized, and allow communication when the inside of the main cylinder is decompressed, and a second check valve (102) configured to allow communication between an ejection hole and the inside of the vertical supply pipe when the inside of the main cylinder is pressurized, and block communication when the inside of the main cylinder is decompressed, and a communication path (180) is provided between the main piston and the main cylinder and is configured to bring the inside of the main cylinder in communication with the inside of the container body when the main piston is moved to a position deviated rearward from a frontmost position.