Vacuum device
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Solution Overview
Problem
Conventional vacuums face difficulties in increasing air flow rate and initial velocity of sucked objects due to turbulence caused by rapid changes in air path and direction, which limits their efficiency in sucking and collecting dust and debris.
Innovation Solution
The vacuum design includes a nozzle with a turn portion and an ejection port located radially outward of the narrowest portion of the inner pipe, allowing pressurized wind to smoothly feed into the pipe and increase suction force, enhancing air flow and initial velocity of sucked objects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pressurized wind is ejected along the periphery of the front pipe at a position spaced from the suction port, then the pipe structure is simple and easy to manufacture, but the air flow rate and initial velocity of sucked objects cannot be increased
Solution Approach 1:
The ejection port is repositioned from the peripheral surface to the inner circumferential surface of the pipe, representing a dimensional change in the spatial arrangement of components. This repositioning allows the pressurized wind to be introduced at a location closer to the suction port, increasing the air flow rate and initial velocity of sucked objects while maintaining manufacturing simplicity
Solution Approach 2:
The narrowest portion is specifically designed at a location different from the ejection port location, creating a localized constriction that accelerates the air flow. This local quality change (narrowest portion) enhances the initial velocity of sucked objects without requiring a complete redesign of the entire pipe structure
2Productivity
If the ejection port is positioned closer to the suction port, then the air flow rate and initial velocity of sucked objects increase, but the structure becomes more complex
Solution Approach 1:
The ejection port is repositioned from the peripheral surface to the inner circumferential surface of the pipe, representing a dimensional change in the spatial arrangement of components. This repositioning allows the pressurized wind to be introduced at a location closer to the suction port, increasing the air flow rate and initial velocity of sucked objects while maintaining manufacturing simplicity
Solution Approach 2:
The position of the ejection port and the location of the narrowest portion are specifically optimized parameters. By changing these positional parameters, the system achieves higher air flow rates and initial velocities without increasing structural complexity, as the changes involve only the arrangement of existing components rather than adding new elements
3Device complexity
If the narrowest portion is located at the ejection port position, then the structure is simplified, but turbulence occurs due to rapid changes in air path and direction
Solution Approach 1:
The narrowest portion is specifically designed at a location different from the ejection port location, creating a localized constriction that accelerates the air flow. This local quality change (narrowest portion) enhances the initial velocity of sucked objects without requiring a complete redesign of the entire pipe structure
Solution Approach 2:
The ejection port is repositioned from the peripheral surface to the inner circumferential surface of the pipe, representing a dimensional change in the spatial arrangement of components. This repositioning allows the pressurized wind to be introduced at a location closer to the suction port, increasing the air flow rate and initial velocity of sucked objects while maintaining manufacturing simplicity
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 enables a larger volume of air to be sucked with increased initial velocity, efficiently guiding objects from the suction port to the discharge port for effective collection, while maintaining smooth airflow and preventing clogging.
Implementation Method 1
The pressurized wind ejected from the ejector 40A passes through the inside of the pipe 10 along the inner surface of the pipe 10 and is ejected to the discharge port 10B. This pressurized wind causes the pressure inside the pipe 10 to be lowered, thereby to generate suction flow (negative pressure) in the pipe 10 from the suction port 10A toward the discharge port 10B.
Implementation Method 2
the turn portion including the suction port 10A and allowing the pressurized wind generated by the blower fan 20 and fed to an outside of the inner pipe 14 to turn toward a base end at around the front end portion of the inner pipe 14
Data Source
Figure 1
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AI summary
Provided is a vacuum capable of increasing the air flow with a larger volume of air sucked from a suction port and increasing the initial velocity (sucking rate) of sucked objects near the suction port, and also capable of smoothly feeding pressurized wind in a pipe and efficiently sucking objects to collect the sucked objects. An ejection port 42 is provided near the suction port 10A by a turn portion 15 and an inner pipe 14. In addition, the ejection port 42 is provided outward of a narrowest portion 14C of the inner pipe 14, the narrowest portion 14C being provided nearer to the base end than the ejection port 42.