CPAP Power Switching for USB Supply Continuity
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Solution Overview
Problem
Traditional CPAP apparatus cannot be powered via a USB connection due to insufficient power delivery, limiting their usability and portability.
Innovation Solution
A respiratory therapy system with a primary and secondary power supply, a controller, and a USB connection that monitors power parameters, engaging the secondary supply if the primary fails to maintain uninterrupted operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If traditional CPAP apparatus use conventional power supply, then sufficient power can be delivered, but portability and usability are limited
Solution Approach 1:
The patent changes the power delivery parameters by implementing USB Power Delivery (PD) specification with variable voltage (5V, 12V, 20V) and current settings. This allows the device to receive higher power (up to 100W) through USB connection while maintaining portability, resolving the contradiction between lightweight design and sufficient power delivery.
2Ease of operation
If USB power supply is used, then portability is improved, but power delivery is insufficient for traditional CPAP apparatus
Solution Approach 1:
The device adapts to different USB power profiles (5V/3A, 12V/3A, 20V/5A) by dynamically adjusting its power consumption requirements. This parameter adaptation enables the CPAP apparatus to operate with portable USB power sources while maintaining adequate therapeutic power delivery.
Solution Approach 2:
The power supply system dynamically switches between different voltage and current settings based on the connected USB power source capabilities. This dynamic adjustment allows the device to optimize power delivery according to available power, enhancing usability across different portability scenarios.
3Reliability
If primary power supply is monitored for parameter deviations, then reliability is improved through secondary power supply engagement, but device complexity increases
Solution Approach 1:
The controller continuously monitors power delivery parameters from the USB power supply and provides feedback to the power management system. When parameters deviate from acceptable ranges, the system automatically engages the secondary power supply, ensuring continuous operation while maintaining manageable complexity through automated feedback-based control.
Solution Approach 2:
The device incorporates a secondary power supply that acts as a backup cushion against primary power supply failures. This prior preparation ensures that power interruptions are prevented, maintaining reliability while the automated switching logic keeps the overall system complexity manageable.
Data Source
AI summary
Described herein is a respiratory therapy system comprising: a primary power supply, a secondary power supply, and a breathing apparatus configured to provide respiratory therapy. The breathing apparatus comprises a controller. There is a connection between the primary power supply and the breathing apparatus configured to facilitate transmission of power and data between the primary power supply and the breathing apparatus. The controller is configured to monitor a parameter of the primary power supply, and disengage the primary power supply if the parameter differs from a parameter threshold. The controller is configured to engage the secondary power supply on disconnection of the primary power supply such that the breathing apparatus can continue operation without interruption.