Liquid Pump Partition Suppresses Air Discharge
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Solution Overview
Problem
Existing liquid pumps face performance degradation due to increased fluid resistance at suction and discharge ports, and higher vibration frequencies can introduce air bubbles into the discharge port-side tank, causing air to be discharged along with the liquid, which reduces the effectiveness of resistance reduction measures.
Innovation Solution
The liquid pump incorporates a discharge-side tank with a partition above the open end of the communicating passage and discharge port, preventing air bubbles from diffusing into the discharge port, and a similar configuration in the suction-side tank stabilizes suction capacity by preventing air from being sucked into the pump chamber.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vibration frequency is increased to increase the discharge quantity, then the discharge quantity increases, but air bubbles are formed in the discharge port-side tank and air is discharged along with the liquid, reducing the effectiveness of resistance reduction
Solution Approach 1:
The discharge port-side tank is divided into an upper air pool region and a lower liquid region by a partition wall. This segmentation prevents air bubbles generated during high-frequency vibration from mixing with the liquid and being discharged, while maintaining the air pool's ability to reduce fluid resistance. The partition creates distinct zones that function independently during the pumping cycle.
Solution Approach 2:
The partition wall acts as an intermediary barrier between the air pool and the liquid. It allows the air pool to maintain its resistance-reduction function while preventing air bubbles from entering the liquid stream and being discharged through the discharge port, thus mediating between the vibration-induced air generation and the liquid discharge function.
2Productivity
If the vibration frequency is increased to increase the discharge quantity, then the discharge quantity increases, but the air pool gradually decreases in size, reducing the effect of reducing fluid resistance
Solution Approach 1:
The partition wall creates a dedicated air pool chamber that is physically separated from the liquid discharge path. This segmentation prevents air bubbles from escaping into the liquid stream, thereby preserving the air pool's volume and its resistance-reduction capability even during high-frequency operation that would otherwise generate and discharge air bubbles.
3Ease of operation
If reservoir tanks are provided at suction and discharge ports to form air pools, then fluid resistance is reduced, but air bubbles are formed and discharged at higher vibration frequencies, degrading pump performance
Solution Approach 1:
The discharge port-side tank is segmented into an upper air pool region and a lower liquid region by a partition wall. This segmentation allows the air pool to maintain its fluid resistance reduction function while preventing air bubbles from mixing with and being discharged in the liquid stream, thus resolving the contradiction between ease of operation and reliability.
Solution Approach 2:
The partition wall serves as an intermediary structure that isolates the air pool from the liquid discharge path. It enables the air pool to reduce fluid resistance during suction while preventing air bubbles from contaminating the liquid discharge, thereby mediating between the resistance reduction benefit and the performance degradation problem.
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 configuration effectively suppresses the discharge of air from the discharge port, maintaining pump performance even at higher frequencies and reducing the size reduction of air pools, thus preventing performance degradation.
Implementation Method 1
a stacked diaphragm vibrator (bimorph vibrator) comprising two mutually bonded piezoelectric elements is disposed as a part of a wall of a pump chamber, and in which the diaphragm vibrator is vibrated by applying an alternating-current voltage thereto, thereby alternately expanding and contracting the volume of the pump chamber and thus transferring liquid
Implementation Method 2
the air in the discharge port-side tank temporarily contracts, thereby decreasing the resistance when the fluid is delivered into the discharge port-side tank from the pump chamber
Implementation Method 3
check valves are disposed respectively between a suction port sucking a liquid and the pump chamber, and between a discharge port discharging the liquid and the pump chamber
Data Source
AI summary
Provided is a liquid pump configured to suppress discharge of air from an air pool formed in a discharge-side tank. A discharge-side tank part formed in a housing has a first inner wall surface and a second inner wall surface facing each other in a horizontal direction in an installed position of the liquid pump. The first inner wall surface is formed with a discharge port, and the second inner wall surface is formed with an opening of a discharge-side communicating passage. An air pool is formed in a space in the discharge-side tank part above the opening of the discharge-side communicating passage and the discharge port. A circular cylindrical partition is provided in the discharge-side tank part. The circular cylindrical partition projects from the second inner wall surface toward the first inner wall surface with at least a portion of the cylindrical partition positioned above the opening of the discharge-side communicating passage so as to cover the opening as seen from the air pool side.