Aerosol Inhalation Control Device Overvoltage Protection
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Solution Overview
Problem
Aerosol inhalation devices, such as electronic cigarettes and nebulizers, face issues with insufficient aerosol supply and inability to generate intended flavors due to aerosol source shortages, and operational amplifiers and control units are prone to overvoltage errors, leading to device malfunctions.
Innovation Solution
A control device with an operational amplifier and control unit that includes a diode to prevent overvoltage at the input terminal, a converter to stabilize voltage for the heater, and a voltage dividing circuit to protect the control unit, ensuring efficient aerosol generation and device operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a heater with high voltage is used to heat the aerosol source, then heating efficiency is improved, but the operational amplifier and control unit are exposed to overvoltage risks
Solution Approach 1:
The patent introduces a diode as an intermediary component between the heater circuit and the operational amplifier/control unit. This diode acts as a protective mediator that allows current to flow in only one direction, blocking any reverse voltage or overvoltage spikes from reaching the sensitive electronic components while permitting normal forward current to pass through for proper operation.
Solution Approach 2:
The patent implements protective circuitry including diodes and voltage dividing circuits before the overvoltage can damage the operational amplifier or control unit. These components are positioned in advance in the circuit path to cushion or absorb potential voltage surges, preventing them from reaching the sensitive components that would otherwise be vulnerable to damage.
2Measurement precision
If voltage-based detection is used to monitor heater status, then aerosol source detection is enabled, but overvoltage can damage the detection circuitry
Solution Approach 1:
The patent uses a voltage dividing circuit with resistors as an intermediary mechanism to detect heater voltage. This circuit divides the high voltage into a lower, safer voltage level that can be accurately measured by the operational amplifier and control unit without exposing them to damaging overvoltage conditions, thus enabling detection while protecting the circuitry.
Solution Approach 2:
The patent transforms the high voltage parameter into a lower voltage parameter through the voltage dividing circuit. By changing the voltage level from high to low while maintaining the proportional relationship, the system can accurately detect heater status using the divided voltage without risking damage to the detection components.
3Productivity
If the control device is designed to handle high voltage for the heater, then heating performance is improved, but the control unit becomes vulnerable to overvoltage errors
Solution Approach 1:
The patent segments the control device into distinct voltage domains: a high-voltage domain for the heater circuit and a low-voltage domain for the operational amplifier and control unit. This segmentation is achieved through protective components like diodes and voltage dividing circuits that create electrical isolation between the domains, allowing each segment to operate at its required voltage level independently.
Solution Approach 2:
The patent introduces protective circuitry as intermediaries between the high-voltage heater circuit and the low-voltage control unit. These intermediaries (diodes, voltage dividing circuits) enable the control device to handle high voltage for improved heating performance while preventing the high voltage from directly affecting the control unit, thus maintaining control unit stability.
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 solution effectively prevents overvoltage errors, ensures stable aerosol generation, and allows for the use of various aerosol sources with a single control device, improving the efficiency and reliability of aerosol inhalation devices.
Implementation Method 1
a diode configured to prevent overvoltage from being applied to an input terminal of the operational amplifier
Implementation Method 2
a heater configured to heat an aerosol source
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
Control device for aerosol inhalation device includes operational amplifier 262 for performing output according to voltage applied to load 132 for heating aerosol source and having correlation between temperature and electrical resistance value, control unit 106 for performing processing based on the voltage according to the output, diode 268 having anode electrically connected to one of inverting input terminal and noninverting input terminal, and circuit for electrically connecting power supply and the load. The circuit is formed by first region (290), and second region (292) in which maximum voltage is lower than that in the first region, or applied voltage is lower than that to the first region. Of the inverting input terminal and the noninverting input terminal, terminal to which the anode of the diode is electrically connected is electrically connected to the first region.