Liquid feeding pump, dispensing system and washing device
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Solution Overview
Problem
Conventional liquid feeding systems for laundry machines and dishwashers face high costs and numerous potential failure points due to the use of motor-driven displacement pumps and venturi tubes, which require multiple valves and flowmeters, increasing complexity and maintenance needs.
Innovation Solution
A liquid feeding pump with a hydraulic chamber and a movable pump chamber member that changes volume in response to hydraulic pressure, allowing for efficient liquid dispensing without the need for motor-driven systems or multiple valves, utilizing a bellows or similar mechanism for sealing and volume change.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a motor-driven displacement pump is used for liquid feeding, then quantitative liquid dispensing can be achieved, but the system cost increases due to motor, control circuit, and interface requirements
Solution Approach 1:
The patent extracts and removes the motor from the liquid feeding system, replacing it with a passive bellows-based pump chamber that achieves quantitative dispensing through hydraulic pressure-driven volume changes alone, eliminating motors, control circuits, and special interfaces
Solution Approach 2:
The patent uses hydraulic pressure to drive the bellows pump chamber to change volume, enabling motor-free quantitative liquid feeding through pure hydraulic actuation of the pump mechanism
2Productivity
If a venturi tube is used for liquid feeding, then liquid conveyance can be achieved, but multiple valves and flowmeters are required increasing system complexity and cost
Solution Approach 1:
The patent removes the venturi tube and associated multiple valves from the system, replacing them with a simplified bellows-based pump chamber that provides both conveyance and quantitative control in a single integrated component
Solution Approach 2:
The patent merges the functions of liquid conveyance and quantitative control into a single bellows pump chamber mechanism, eliminating the need for separate venturi tube, flowmeter, and multiple valve components
3Productivity
If motor-driven displacement pump is used, then liquid pumping can be achieved, but the number of parts increases leading to more potential failure points
Solution Approach 1:
The patent extracts and eliminates the motor and its associated control circuitry from the liquid pumping system, reducing the number of moving parts and potential failure points while maintaining pumping functionality through passive bellows mechanism
Solution Approach 2:
The bellows pump chamber is designed to automatically change volume in response to hydraulic pressure without requiring external motor control, achieving self-regulated liquid pumping with fewer active components
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 solution reduces costs and potential failure points by eliminating the need for motor-driven systems and multiple valves, providing a reliable and efficient liquid dispensing mechanism with improved sealing performance and a wider hydraulic pressure range.
Implementation Method 1
the first liquid entering the hydraulic chamber through the water inlet portion can urge the pump chamber member towards its second configuration, thereby pumping the second liquid from the pump chamber through the liquid outlet portion
Data Source
AI summary
A liquid feeding pump is disclosed, including: a pump housing defining a hydraulic chamber, and a water inlet portion and a water outlet portion allowing a first liquid to enter or to be discharged from the hydraulic chamber; a pump chamber member defining a pump chamber isolated from the hydraulic chamber, the pump chamber member being movable between a first configuration in which the pump chamber has a first volume and a second configuration in which the pump chamber has a second volume; a liquid inlet portion and a liquid outlet portion allowing a second liquid to enter or to be discharged from the pump chamber; wherein, the liquid feeding pump is configured such that the first liquid entering the hydraulic chamber via the water inlet portion can urge the pump chamber member towards its second configuration, thereby pumping the second liquid out of the pump chamber.