Dual-Path Ejector Nozzle for Variable Flow Rate Performance
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Solution Overview
Problem
Ejector nozzles face challenges in accommodating both low-flow and high-flow rate regions, as a large nozzle size enhances high-flow rate performance but deteriorates low-flow rate performance, and a small nozzle size achieves high flow velocity in low-flow rates but struggles with high-flow rates due to limited fluid passage.
Innovation Solution
The ejector nozzle features a dual-tube structure with a first tube and a second tube of larger inner diameter, where a communication port allows fluid to flow between the two paths, enabling the nozzle to adjust its flow path size based on fluid flow rate by opening or closing the port, facilitated by an elastic member that operates without separate control means.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the nozzle has a large size, then high-flow rate performance is improved, but low-flow rate performance deteriorates
Solution Approach 1:
The nozzle diameter is made dynamically adjustable through a drive mechanism that can change the nozzle diameter based on operating conditions. This allows the nozzle to adapt its size to match the flow rate requirements, maintaining optimal performance across both high-flow and low-flow rate sections.
Solution Approach 2:
The physical parameter of nozzle diameter is changed dynamically to suit different operating conditions. By varying the nozzle diameter parameter according to the flow rate, the system achieves both high productivity in high-flow modes and high flow velocity in low-flow modes.
2Speed
If the nozzle has a small size, then flow velocity in low-flow rate section is improved, but high-flow rate capability deteriorates
Solution Approach 1:
The nozzle diameter is made dynamically adjustable through a drive mechanism that can change the nozzle diameter based on operating conditions. This allows the nozzle to adapt its size to match the flow rate requirements, maintaining optimal performance across both high-flow and low-flow rate sections.
Solution Approach 2:
The physical parameter of nozzle diameter is changed dynamically to suit different operating conditions. By varying the nozzle diameter parameter according to the flow rate, the system achieves both high productivity in high-flow modes and high flow velocity in low-flow modes.
3Device complexity
If a single fixed nozzle size is used, then device complexity is reduced, but adaptability to various flow rates deteriorates
Solution Approach 1:
The nozzle diameter is made dynamically adjustable through a drive mechanism that can change the nozzle diameter based on operating conditions. This allows the nozzle to adapt its size to match the flow rate requirements, maintaining optimal performance across both high-flow and low-flow rate sections.
Solution Approach 2:
The adjustable nozzle structure serves multiple functions: it can operate in high-flow rate mode with a larger diameter and in low-flow rate mode with a smaller diameter. This multi-functionality allows a single nozzle structure to handle various flow rate conditions effectively.
Data Source
AI summary
The present disclosure provides an ejector nozzle and an ejector including the same. The ejector nozzle includes a first tube having a first flow path into which a fluid is introduced, and a second tube provided outside the first tube and having an inner diameter larger than an inner diameter of the first tube, the second tube defining a second flow path between the first tube and the second tube, in which the first tube further includes a communication port that penetrates the first tube to allow the first flow path to communicate with the second flow path and is openably and closable provided, and in which when the communication port is opened, a part of the fluid flowing in the first flow path is allowed to flow along the second flow path.