Handheld electric vacuum
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Solution Overview
Problem
Conventional handheld electric vacuums face issues with noise generation, fan damage, inefficient collection of large materials, and difficulty in switching between suction and blowing modes due to their structural limitations.
Innovation Solution
A handheld electric vacuum design featuring a pipe with a constant internal diameter, a centrifugal blower positioned outside the pipe, an ejector to generate swirling airflow, and a switching mechanism that allows easy transition between suction and blowing modes without compromising the blower's integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the blower is positioned inside the pipe to generate suction, then the suction force is improved, but the blower contacts dust and debris causing noise and damage
Solution Approach 1:
The blower is extracted from the interior of the pipe and positioned in the circumferential direction outside the pipe. This separation prevents the blower from contacting dust and debris while maintaining its suction-generating function, thereby improving reliability without sacrificing power.
Solution Approach 2:
A communication port is introduced as an intermediary structure that allows the blower to generate suction force that is transmitted into the pipe through the pipe wall. This mediator enables force transmission while maintaining physical separation between the blower and contaminants.
2Adaptability or versatility
If the pipe internal diameter varies to collect large materials, then the collection capability is improved, but the flow efficiency decreases
Solution Approach 1:
The pipe is designed with a constant internal diameter along its length, ensuring uniform flow efficiency. Meanwhile, the opening of the pipe is designed to allow large materials to enter, creating local adaptability at the entry point without compromising the overall flow characteristics through the pipe.
3Adaptability or versatility
If the switching mechanism between suction and blowing modes is added, then the versatility is improved, but the device complexity increases
Solution Approach 1:
The blower is designed to perform both suction and blowing functions by simply changing the opening/closing state of the communication port. This multi-functionality is achieved without complex switching mechanisms, as the same blower unit serves both purposes through different operational configurations.
Solution Approach 2:
The suction and blowing functions are merged into a single operational system controlled by the communication port. By combining both functions into one blower unit with a single control mechanism (port opening/closing), the device achieves versatility while minimizing structural complexity.
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 design effectively suppresses noise, prevents blower damage, enables efficient collection of large materials, and facilitates seamless switching between suction and blowing operations, enhancing operational efficiency and durability.
Implementation Method 1
an ejector to generate swirling airflow
Implementation Method 2
configured to feed pressurized wind generated by the blower into the pipe from around the pipe
Data Source
AI summary
A handheld electric vacuum configured to perform sucking work includes: a pipe including a suction port at one end and a discharge port at the other end; a blower provided outside the pipe and driven by an electric motor; a handle provided outside the pipe and near the discharge port in a longitudinal direction of the pipe, and configured to be held by a hand; and an ejector provided near the suction port in the longitudinal direction of the pipe, and configured to feed pressurized wind generated by the blower into the pipe from around the pipe, and to eject the pressurized wind to the discharge port.