Dual-Power Vacuum Cleaner Control Without AC/DC Switch Modules
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Solution Overview
Problem
Existing vacuum cleaners lack the ability to seamlessly switch between AC and DC power sources without a separate switch module or sensor, limiting their versatility and user convenience.
Innovation Solution
A vacuum cleaner design that includes a detachable power supply unit capable of using both AC and DC power sources, featuring a voltage detecting unit and controller to adjust the duty ratio of the driving circuit based on the applied voltage, allowing for efficient operation without a separate switch or sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a separate switch module or sensor is added to enable switching between AC and DC power sources, then the cleaner can use both power sources, but the device complexity and manufacturing cost increase
Solution Approach 1:
The voltage detecting unit automatically detects whether AC or DC voltage is applied and the controller autonomously adjusts the driving circuit parameters accordingly, eliminating the need for manual switches or sensors. The system serves itself by automatically adapting to the connected power source type.
Solution Approach 2:
The controller changes the duty ratio parameter of the driving circuit based on the detected voltage type. When AC voltage is detected, the duty ratio is reduced to a first value; when DC voltage is detected, the duty ratio is increased to a second value, enabling optimal operation for each power source without additional hardware.
2Adaptability or versatility
If a separate switch module or sensor is added to enable switching between AC and DC power sources, then the cleaner can use both power sources, but the manufacturing cost increases
Solution Approach 1:
The voltage detecting unit automatically detects whether AC or DC voltage is applied and the controller autonomously adjusts the driving circuit parameters accordingly, eliminating the need for manual switches or sensors. The system serves itself by automatically adapting to the connected power source type.
Solution Approach 2:
The controller changes the duty ratio parameter of the driving circuit based on the detected voltage type. When AC voltage is detected, the duty ratio is reduced to a first value; when DC voltage is detected, the duty ratio is increased to a second value, enabling optimal operation for each power source without additional hardware.
3Power
If the cleaner is designed to use only AC power source with high output suction motor, then the motor performance is optimized, but the cleaner cannot operate with DC power source
Solution Approach 1:
The driving circuit dynamically adjusts its operation based on the detected power source type. The duty ratio is dynamically changed between a first value for AC power and a second value for DC power, allowing the motor to operate efficiently with either power source while maintaining high suction performance when AC is available.
Solution Approach 2:
The controller changes the duty ratio parameter of the driving circuit based on the detected voltage type. When AC voltage is detected, the duty ratio is reduced to a first value; when DC voltage is detected, the duty ratio is increased to a second value, enabling optimal operation for each power source without additional hardware.
4Productivity
If the duty ratio is not adjusted based on voltage type, then the driving circuit operation is simplified, but the cleaner cannot efficiently operate on both AC and DC power sources
Solution Approach 1:
The voltage detecting unit automatically detects whether AC or DC voltage is applied and the controller autonomously adjusts the driving circuit parameters accordingly, eliminating the need for manual switches or sensors. The system serves itself by automatically adapting to the connected power source type.
Solution Approach 2:
The controller changes the duty ratio parameter of the driving circuit based on the detected voltage type. When AC voltage is detected, the duty ratio is reduced to a first value; when DC voltage is detected, the duty ratio is increased to a second value, enabling optimal operation for each power source without additional hardware.
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
Enables the vacuum cleaner to operate efficiently on both AC and DC power sources, minimizing volume and weight, reducing manufacturing costs, and enhancing user convenience by allowing easy selection of power sources, while maximizing utilization coverage.
Implementation Method 1
a voltage detecting unit detecting a voltage applied from the power supply unit
Implementation Method 2
a suction force generating unit installed in the main body to generate a suction force
Data Source
Figure 1a
Figure 1b~2
Figure 3a~3c
AI summary
Provided are a vacuum cleaner that uses both alternating current (AC) power and direct current (DC) power without a separate switch module, and a control method thereof. The cleaner includes a suction nozzle sucking a cleaning target, a suction connection part connected to the suction nozzle and allowing the sucked cleaning target to pass therethrough, and a main body separated from the suction nozzle and having a dust box collecting the cleaning target, wherein the main body includes a suction force generating unit installed in the main body to generate a suction force and a power supply unit detachably provided in the main body to apply a voltage to the suction force generating unit, wherein the power supply unit supplies power to the suction force generating unit using any one of a DC voltage and an AC voltage.