Nested Press Liquid Pump Layout for Hygienic Dispensing
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Solution Overview
Problem
Conventional push-type liquid pumps are prone to contamination due to direct contact with the liquid outlet when pressed, which is unsuitable for high-hygiene applications.
Innovation Solution
A press liquid pump design with a separate pressing position and liquid outlet position on different ends of an outer pipe, incorporating inner and outer pipes, check valves, and a threaded connection for assembly, ensuring the liquid outlet is protected and contamination is avoided.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the pressing handle and nozzle are disposed on one component, then the structure is convenient and simple, but the user may easily touch the nozzle when pressing, causing contamination to the liquids
Solution Approach 1:
The pressing portion and liquid outlet pipe are segmented into separate spatial locations. The pressing portion is disposed inside the outer pipe while the liquid outlet pipe extends outside the outer pipe, physically separating the user's pressing action from the liquid outlet to prevent contamination.
Solution Approach 2:
The outer pipe acts as an intermediary barrier between the pressing portion and the liquid outlet pipe. This intermediate structure allows the pressing force to be transmitted through the inner pipe and pumping mechanism without requiring direct user contact with the liquid outlet area.
2Object-affected harmful factors
If the pressing position and liquid outlet position are separated, then contamination is prevented, but the device structure becomes more complex
Solution Approach 1:
The inner pipe is nested within the outer pipe, creating a compact layered structure. This nesting arrangement allows the pressing portion (inside inner pipe) and liquid outlet pipe (outside outer pipe) to be spatially separated while maintaining a compact overall form factor.
Solution Approach 2:
The outer pipe serves multiple functions: it provides structural support, acts as a protective barrier, defines the pressing chamber space, and serves as a mounting structure for the liquid outlet pipe. This multi-functionality reduces the need for additional separate components.
3Productivity
If the inner pipe is pressed towards the vacuum pump head, then liquid is pumped out, but the liquid may leak back into the inner pipe
Solution Approach 1:
The check valve provides automatic one-way flow control without requiring external control mechanisms. When the inner pipe is pressed, the check valve automatically opens to allow liquid flow in the forward direction and automatically closes to prevent backflow, ensuring reliable liquid dispensing.
Solution Approach 2:
The pressure differential that could potentially cause unwanted backflow is converted into a beneficial mechanism for the check valve operation. The pressure difference naturally drives the check valve to open during pressing and close during retraction, converting what could be a harmful backflow condition into a reliable flow control mechanism.
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 effectively prevents contamination by separating the pressing and liquid outlet positions, maintaining hygiene and ensuring reliable liquid dispensing in any orientation.
Implementation Method 1
A first check valve is disposed in the liquid inlet. The first check valve is configured to unidirectionally communicate the liquid inlet to the second pressing groove. A second check valve is disposed in the liquid outlet pipe.
Data Source
AI summary
A press liquid pump includes an outer pipe and an inner pipe disposed in the outer pipe. A vacuum pump head is disposed on the outer pipe. A liquid outlet pipe of the vacuum pump head is disposed outside the outer pipe. A pressing portion of the vacuum pump head is disposed in the outer pipe. A first opening is defined in the outer pipe. A first end of the inner pipe is closed, and a second end of the inner pipe defines a second opening. When the inner pipe is disposed in the outer pipe, the inner pipe is inserted into the outer pipe, and the inner pipe is connected with the pressing portion of the vacuum pump head. When the inner pipe is pressed towards the vacuum pump head, liquid in the inner pipe is pumped to an outside of the outer pipe.