Dual-Function Liquid Pump With Piston-Independent Airflow Control

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Solution Overview

Problem

Conventional dual-function liquid suction and discharge pumps have a complex configuration that restricts airflow, affecting efficiency and compromises the piston's ability to maintain an effective airtight seal over time.

Innovation Solution

A dual-function liquid pump with an integrated airflow control assembly featuring a piston that obstructs communication between chambers, one-way valves for unidirectional air flow, and a control valve with movable sealing rings to manage airflow, eliminating the need for air to pass through the piston.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If air flows unidirectionally from the upper chamber through the piston to the lower chamber, then the piston maintains airtight sealing, but the piston structure becomes complex and frictional losses increase

Engineering Contradiction:

Improveairtight sealingVSAvoidpiston structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The air flow path is segmented into separate conduits (first air conduit and second air conduit) that are independent of the piston structure. The first air conduit receives air from the upper chamber and the second air conduit receives air from the lower chamber, eliminating the need for air to pass through the piston while maintaining sealing integrity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Air conduits serve as intermediary elements that transfer air between chambers without requiring the piston to be part of the air flow path. The first air conduit and second air conduit act as mediators that enable air transfer while keeping the piston structure simple and reducing frictional losses.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Productivity

If the piston reciprocates repeatedly, then liquid pumping function is maintained, but the piston's airtight seal capacity diminishes over time

Engineering Contradiction:

Improveliquid pumpingVSAvoidairtight seal capacity

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The air flow function is extracted from the piston structure and transferred to separate air conduits. The first air conduit and second air conduit are independently positioned to receive air from respective chambers, eliminating the requirement for the piston to maintain airtight sealing during reciprocation while preserving liquid pumping productivity.

Inventive Principle:

Principle #2Taking out (Extraction)

3Ease of operation

If air passes through the piston, then unidirectional gas flow is achieved, but frictional losses increase and airflow efficiency decreases

Engineering Contradiction:

Improveunidirectional gas flowVSAvoidfrictional losses

Core Design Contradiction:

Ease of operationVSLoss of energy

Solution Approach 1:

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The mechanical air flow control through the piston is replaced with a conduit-based air transfer system. The first air conduit and second air conduit provide dedicated pathways for air transfer, eliminating the need for air to pass through the piston and reducing frictional losses while maintaining unidirectional flow control.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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 simplified design enhances airflow efficiency, extends piston durability, and improves liquid pumping efficiency by allowing unidirectional airflow without passing through the piston, reducing frictional losses and maintaining effective sealing.

Implementation Method 1

a first one-way valve disposed between the pump cylinder and the first air conduit and configured to allow air to flow only from the lower chamber to the first air conduit

Methodology Applied

Scientific EffectOne-way valve: Valve

Implementation Method 2

a second one-way valve disposed between the pump cylinder and the second air conduit and configured to allow air to flow only from the second air conduit to the lower chamber

Methodology Applied

Scientific EffectOne-way valve: Valve

Implementation Method 3

a piston disposed within the cylinder chamber and dividing the cylinder chamber into an upper chamber and a lower chamber, the piston obstructing communication between the upper chamber and the lower chamber

Methodology Applied

Scientific EffectPiston:

Implementation Method 4

a control valve comprising: a valve rod disposed within the valve chamber and configured for axial reciprocal movement, the valve rod extending from both axial ends of the valve housing to define a first actuator end and a second actuator end, the valve rod carrying a first sealing ring, a second sealing ring, and a third sealing ring circumferentially thereon

Methodology Applied

Scientific EffectControl valve: Valve

Data Source

PatentUS20250290493A1Dual-function liquid pump with integrated airflow control assembly

Publication Date: 2025.09.18 HSU HENG YI

AI summary

A dual-function liquid pump with an integrated airflow control assembly is disclosed. The pump comprises a liquid reservoir configured to contain a liquid, a cover assembly removably coupled to the liquid reservoir, a pump cylinder coupled to the cover assembly, and a control valve disposed on the cover assembly. A liquid guide tube extends into the liquid reservoir. The pump cylinder defines a cylinder chamber in which a piston is disposed. Reciprocation of the piston enables air to be drawn out of or pumped into the liquid reservoir, thereby inducing liquid flow into the liquid reservoir through the liquid guide tube or discharging liquid from the liquid reservoir through the liquid guide tube.