Trigger Sprayer S Valve Flow Direction Inversion
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Solution Overview
Problem
Conventional S valves in trigger sprayers hinder liquid flow efficiency due to the rod-like valve body moving opposite to the liquid flow direction, reducing the effectiveness of liquid ejection.
Innovation Solution
The S valve design includes a first valve body with a passage hole extending in the central axial direction, allowing it to move in the same direction as the liquid flow, minimizing horizontal oscillation and enabling stable slide movement, with a small-diameter cylindrical part and large-diameter cylindrical part coupled via a connecting part, and a coil spring for elastic pressure, ensuring efficient liquid flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the rod-like valve body moves backward (upstream) when liquid is pressurized, then the valve can open to allow liquid flow, but the liquid flows in the opposite direction to the valve body movement, creating hindrance and decreasing liquid flow efficiency
Solution Approach 1:
The patent inverts the conventional valve body movement direction. Instead of the valve body moving upstream (backward) when opening, the valve body now moves downstream (in the same direction as liquid flow). This inversion eliminates the harmful opposition between valve movement and liquid flow direction, thereby resolving the contradiction between reliable valve opening and efficient liquid flow.
2Ease of manufacture
If the valve body structure is simplified to a rod-like shape, then manufacturing is easier, but the valve creates hindrance to liquid flow and reduces spraying efficiency
Solution Approach 1:
The patent transforms the static rod-like valve body into a dynamic structure with multiple functional zones. The valve body now includes a pressurization zone, flow passage zone, and expansion zone that dynamically adapt to different flow stages. This dynamic design maintains manufacturing simplicity while dramatically improving liquid flow efficiency and spraying performance.
Solution Approach 2:
The patent adds dimensional complexity to the valve body by creating an expanded distal end portion with increased diameter. This dimensional change creates a flow expansion zone that enhances liquid flow efficiency without complicating the basic rod-like structure, thus maintaining ease of manufacture while improving productivity.
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 enhances liquid flow efficiency by allowing the valve body to move in the same direction as the liquid, reducing hindrance and ensuring stable operation, while also facilitating easy placement and efficient air purging during initial use.
Implementation Method 1
a coil spring that elastically presses the first valve body downward
Data Source
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AI summary
[Object] To provide a trigger sprayer including a valve through which liquid flows with very high efficiency. [Solution] The present invention is directed to a trigger sprayer for, in a state of being attached to a container, causing liquid inside the container to be sprayed from a nozzle part 3 through a passage by rotating a trigger part to move a piston part 5 to apply pressure to liquid inside a cylinder portion 42A of a cylinder structure 4, including: an F valve 2 provided in a passage between the cylinder portion 42A and the container; and an S valve 1 provided in a passage section between the cylinder portion 42A and the nozzle part 3, wherein the S valve 1 includes a first valve body 11 and a first valve seat 12, the first valve body 11 is oppressed against the first valve seat 12, and when the first valve body 11 moves away from the first valve seat 12 so that the S valve 1 opens, the first valve body 11 moves in the same direction as the direction that the liquid flows.