Vacuum Generator Ejector Integration for High Vacuum
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Solution Overview
Problem
Existing vacuum handling devices with electrically driven primary vacuum generators face challenges in achieving high vacuum levels and energy efficiency, particularly in systems without pneumatic infrastructure, as improving vacuum levels often requires complex and expensive solutions.
Innovation Solution
The integration of an ejector device using the suction jet pump principle, where the suction connection of the electrically driven primary vacuum generator is flow-connected to the outlet opening of the ejector device, allowing for improved vacuum levels with high energy efficiency and the ability to handle large volume flows, and multiple ejector devices can be connected in parallel to enhance the vacuum level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If higher rotational speeds or improved sealing of fan impellers are used to improve vacuum level in electrically driven vacuum generators, then vacuum level is improved, but device complexity and cost increase
Solution Approach 1:
The patent introduces an ejector device as an intermediary component between the primary vacuum generator and the vacuum handling device. The ejector uses the primary suction flow to generate enhanced vacuum at its suction opening, acting as a mediator that transforms the primary vacuum into improved vacuum without requiring complex modifications to the primary generator itself
Solution Approach 2:
The invention utilizes pneumatic principles through the ejector device, which operates based on the suction jet pump principle. The ejector converts the kinetic energy of the primary suction flow into a vacuum effect at the suction opening, leveraging fluid dynamics to achieve the desired vacuum enhancement without mechanical complexity
2Stress or pressure
If higher rotational speeds or improved sealing of fan impellers are used to improve vacuum level, then vacuum level is improved, but manufacturing cost increases
Solution Approach 1:
The ejector device serves as a cost-effective intermediary that achieves vacuum enhancement through simple pneumatic design rather than expensive modifications to the primary vacuum generator, such as higher rotational speeds or improved sealing mechanisms
Solution Approach 2:
The invention changes the operational parameters by using the primary suction flow itself as the driving force for the ejector, rather than increasing the rotational speed or improving sealing of the primary generator. This parameter change approach achieves vacuum improvement through flow utilization rather than generator enhancement
3Stress or pressure
If multi-stage ejectors with several ejectors connected in series are used to improve vacuum, then vacuum level is improved, but device complexity increases
Solution Approach 1:
The ejector device is segmented into functional components (jet nozzle, collection nozzle, suction opening) that work together within a single unit. This segmentation allows complex vacuum enhancement functionality to be achieved through modular component arrangement rather than multiple separate ejectors connected in series
Solution Approach 2:
The patent merges the jet nozzle, collection nozzle, and suction opening into a single integrated ejector device that is connected to the primary vacuum generator. This merging achieves multi-stage vacuum enhancement效果 within one compact unit, avoiding the complexity of multiple separate ejectors connected in series
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 allows for a cost-effective and technically less complex solution to achieve improved vacuum levels and high volume flows, reducing the complexity and material requirements of the overall system while minimizing leakage losses and increasing service life.
Implementation Method 1
at least one ejector device (22) is provided, which has an inlet opening (24) open to the environment, an outlet opening (26), and a suction opening (28), and in which a suction effect can be generated at the suction opening (28) by utilizing the principle of a suction jet pump
Implementation Method 2
an electrically driven primary vacuum generator (16) with a suction port (20) for drawing in a primary suction flow
Data Source
Figure 1
Figure 2a~2b
Figure 3
AI summary
The invention relates to a vacuum generator device with an electrically driven primary vacuum generator having a suction port for drawing in a primary suction flow, and with at least one ejector device which has an inlet opening open to the environment, an outlet opening and a suction opening and is permeable to a suction flow from the inlet opening to the outlet opening, causing a suction effect at the suction opening, wherein the suction port of the electrically driven primary vacuum generator is flow-connected to the outlet opening of the ejector device.