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Oxygen Concentrator Controller with Smart Connectivity

Overview

Description

The rise in respiratory conditions such as COPD (Chronic Obstructive Pulmonary Disease) and complications from COVID-19 has led to increased demand for devices like oxygen concentrators, which provide oxygen therapy. These concentrators work by selectively removing nitrogen from a gas supply to deliver oxygen-rich airflow, aiding patient breathing. 

This controller for oxygen concentrators operates in pressure swing mode, where modes 1 and 2 periodically alternate via control valves to absorb nitrogen, thereby increasing oxygen concentration and clearing nitrogen through reverse airflow.

System Benefits​:

  • The RA Arm® Cortex®-M MCU supports the Flexible Software Package (FSP), built on FreeRTOS, and is expandable to other RTOSes and middleware, making it adaptable to various features and requirements.
  • Features a user interface via LCD + Touch and/or GUI via Bluetooth®, connectable to a smartphone for real-time data and flexible control.
  • Operates on a standard medical-grade power supply (~24VDC) for compatibility.

Comparison

Applications

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4:3 ratioSheet.272Sheet.126Sheet.1Sheet.2Sheet.3Sheet.4EU116EU116EU116Mode 2Mode 2Mode 2Mode 1Mode 1Mode 1Air Flow Sensor *Air Flow Sensor *Air Flow Sensor *Indoor Air Quality SensorIndoor Air Quality SensorIndoor Air Quality SensorOutdoor Air Quality SensorOutdoor Air Quality SensorOutdoor Air Quality SensorDual MOSFET x3Dual MOSFET x3Dual MOSFET x31A Buck1A Buck1A Buck300mA Buck300mA Buck300mA Buck2.5A Buck2.5A Buck2.5A BuckAntennaAntennaAntennaMOSFET Dual x3MOSFET Dual x3MOSFET Dual x3Bridge Driver 1Bridge DriverBridge DriverBridge Driver 2Bridge DriverBridge DriverBridge Driver 3Bridge DriverBridge DriverPassive FilterPassive FilterPassive FilterInputSheet.40Sheet.41Sheet.42Sheet.43Sheet.44Sheet.45Sheet.46Sheet.48Ext. Supply 24VDCExt. Supply 24VDCExt. Supply 24VDCSwitch Operation ModesSwitch Operation ModesSwitch Operation ModesSheet.52Sheet.53Sheet.54Sheet.56Sheet.58Sheet.59Compressor MotorSheet.61Sheet.62Sheet.63MotorSheet.65Sheet.66MMShuntSheet.68Sheet.69Sheet.70GroundSheet.75Sheet.76Shunt.84Sheet.91Sheet.85Sheet.86Sheet.87Ground.88Sheet.90Sheet.98Sheet.99Sheet.100Sheet.101Ground.88Sheet.103Sheet.104Sheet.105Sheet.106Sheet.107Sheet.108Sheet.109 2 222Sheet.112Sheet.113Sheet.114 2 222Sheet.117Sheet.118Sheet.119 2 222Sheet.122Sheet.123Sheet.124Sheet.125Sheet.127Sheet.128Sheet.129Sheet.130Sheet.131Sheet.132Sheet.134Sheet.135Sheet.136Sheet.137Sheet.138Sheet.140Sheet.141Sheet.142Sheet.144Graphical LCD (Depends on MCU type, e.g. RA6M3)Graphical LCD (Depends on MCU type, e.g. RA6M3)Graphical LCD (Depends on MCU type, e.g. RA6M3)Sheet.147Sheet.148Sheet.149Sheet.151Sheet.152Input protect /clamp circuitInput protect /clamp circuitInput protect /clamp circuitSheet.154Sheet.155Sheet.156Sheet.157Sheet.158Sheet.159100Mbs Ethernet PHY100Mbs Ethernet PHY100Mbs Ethernet PHYSheet.161Sheet.162Sheet.163Shunt.164Sheet.165Sheet.166Sheet.167Shunt.168Sheet.169Sheet.170Sheet.171Sheet.231Sheet.212Sheet.213Sheet.214Sheet.215Sheet.216Sheet.217Sheet.218Sheet.219Sheet.220Sheet.221Sheet.222Sheet.223Connector.231Connector.232Connector.233Sheet.227Negative Power RailLine.758Line.759Sheet.232Sheet.234Sheet.235Sheet.236Sheet.237Sheet.238Sheet.239Sheet.240Sheet.241Sheet.242Sheet.243Sheet.244Connector.231Connector.232Connector.233Sheet.248Negative Power RailLine.758Line.759Sheet.261Solenoid ValveConnector ArrowConnector Arrow.714Shunt.255Sheet.256Sheet.257Sheet.258Sheet.259Sheet.260Solenoid ValveConnector ArrowConnector Arrow.714Shunt.255Sheet.267Sheet.268Sheet.269Sheet.270Sheet.271Sheet.273Sheet.274Connector 1.170Connector 1.170.276Connector 1.170.277Inlet AirInlet AirInlet AirBLDC MotorBLDC MotorBLDC Motor 6633Sheet.283 2222Sheet.28610mAmax10mAmax10mAmax18V18V18V5V5V5V3V33V33V3280mAmax280mAmax280mAmax 2..4Communication Lines B.795 2..42..42..4 5V5V5V 3V33V33V3 100mAmax100mAmax100mAmax n nnnSheet.303Keys or Keypad or CapTouchKeys or Keypad or CapTouchKeys or Keypad or CapTouch +5V+5V+5VA USBA USBA USB GNDGNDGND BBBEthernet IoT Wired Connection, e.g. MQTT, HTTPS, or...Ethernet IoT Wired Connection, e.g. MQTT, HTTPS, or...Ethernet IoT Wired Connection, e.g. MQTT, HTTPS, or... 6 666Sheet.313 2 222Sheet.316 2 222Sheet.319V1V1V1Sheet.323Touch KeySheet.326Sheet.327Sheet.328Sheet.329Sheet.330Sheet.331Sheet.332Sheet.333Sheet.334Sheet.337Sheet.338Connector 1.170.340Connector 1.170.341Air Flow Sensor*Air Flow Sensor*Air Flow Sensor* Air Flow Sensor*Air Flow Sensor*Air Flow Sensor*Sheet.344Tiny Air CompressorTiny Air CompressorTiny Air CompressorConnector 1.170.346Connector 1.170.347Sheet.351Humidity & Temperature SensorHumidity & Temperature SensorHumidity & Temperature Sensor 2 222Sheet.358Connector 1.170.359Connector 1.170.36010mAmax10mAmax10mAmaxSheet.364Sheet.365Sheet.366 2 222Sheet.369 2 222Sheet.372 2 222Sheet.375 1-31-31-31-3Sheet.378Shunt(s)Shunt(s)Shunt(s)Sheet.380Sheet.381Connector 1.170.383Connector 1.170.384Connector 1.170.385Sheet.386Connector 1.170.38810mAmax6mAmax6mAmax6mAmax6mAmax6mAmax25µ Aavg25µ Aavg25µ Aavg2 222Sheet.394 2 222Sheet.397 2 222Sheet.400Sheet.401Sheet.402Sheet.403Sheet.404Sheet.405Sheet.406Sheet.407Sheet.408Connector 1.170.409Sheet.410Connector 1.411Sheet.412 140mAmax140mAmax140mAmaxConnector 1.170.414Connector 1.170.416 n nnnSheet.419nnnnSheet.4222 222Sheet.425100mAmax100mAmax100mAmax55mAtyp55mAtyp55mAtypTank 1 provides O2, Tank 2 clearing N2Tank 1 provides O2 Tank 2 clearing N2Tank 1 provides O2Tank 2 clearing N2Tank 1 clearing N2, Tank 2 provides O2Tank 1 clearing N2 Tank 2 provides O2Tank 1 clearing N2Tank 2 provides O2Sheet.436Sheet.437Sheet.438Sheet.439Sheet.440Connector 1.170.441Connector 1.442V2V2V2V3V3V3V6V6V6Sheet.446 1-3 1-31-31-3Sheet.449Sheet.450Input.454Input.455Input.456Input.457Sheet.458Control MCUControl MCUControl MCU VddVddVddPWM x6PWM x6PWM x6 ADC x3ADC x3ADC x3I2CI2CI2C I2CI2CI2C GPIOGPIOGPIOGraphic LCDGraphic LCDGraphic LCD GPIOGPIOGPIO USBUSBUSBEthernetEthernetEthernetUART or SPIUART or SPIUART or SPISheet.459Wi-Fi Bluetooth ModuleWi-Fi Bluetooth ModuleWi-Fi BluetoothModuleVddVddVddUART or SPIUART or SPIUART or SPI
Exiting Interactive Block Diagram

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