Choose the right sensor to improve sleep ventilator efficiency, accuracy and reliability, and enhance patient comfort

May 30, 2023

Author: Honeywell Sensing and Control, global product director AJ Smith

Sleep Apnea, commonly known as snoring, is a disorder that afflicts many people, which has a significant impact on their sleep. Treating this disease is a challenge for medical device manufacturers. Based on a solution to this problem, this article focuses on a variety of sensor solutions for sleep breathing apparatus and explains the differences between them, providing valuable technical insight to medical device manufacturers.

Sleep apnea syndrome, a term commonly known as snoring, which causes millions of patients worldwide to worry about, is a recurrence of respiratory arrest during sleep, sometimes up to hundreds of times per night, usually up to a minute or so per time, or even Longer. If left unmanaged, will lead to memory loss and weight imbalance, but also cause high blood pressure and cardiovascular disease. The resulting lack of sleep and fatigue, but also may lead to work-related accidents and motor vehicle accidents culprit.

One of the commonly used treatments is the use of positive pressure breathing (PAP) machines. The patient sleeps wearing a special mask to the pressure of the air into the patient's nose to avoid suffocation. There are three forms of this ventilator:

CPAP (Continuous Positive Pressure Ventilator), constantly supplying a certain amount of pressure to the air. This positive pressure prevents obstruction of the upper airway caused by collapse of the upper airway during sleep, allowing the patient to breathe freely and avoiding apnea.

Auto-PAP (Automatic Positive Pressure Ventilator) measures the resistance of a patient's breathing and adjusts the pressure required to empty the air based on the amount of resistance to ensure that every breath is clear and unobstructed.

Bilevel PAP provides two types of pressure: positive and negative expiratory pressure.

Picture Note: Sensors used on sleep ventilators to help control airflow, pressure, humidity and temperature, and stable motor control.

Sensor type for sleep ventilator

Image Note: Typical sleep breathing apparatus uses gas mass flow sensors, magnetic sensors, humidity sensors, temperature sensors and pressure sensors.

Various types of sensors are used on sleep ventilators to monitor and help control airflow, pressure, humidity and temperature while supporting stable motor control.

Biomass Burner

  • Hopper: used to store biomass pellets.
  • Main body of vaporization chamber: biomass particle fuel gasification in gasification chamber
  • Fire mouth (fire mouth): divided into inner tube and outer tube, the inner tube emits combustion gas.
  • Grate: The middle position of the door of the vaporization chamber, used for air distribution when the particles are burned and vaporized.
  • Ash door: The burner must open the door every 2-8 hours of work to clean the ash on the grate. When opening the door, be sure to stop the blower for more than 10 minutes and stand on the side of the door and keep it for more than 2 meters. The safe distance, after the blower stops running, open with a long iron. There is no flame and the combustible gas can be ejected before the door can be cleaned.
  • Blower: Distribution of air for combustion and gasification.
  • Wind box: used to adjust the air volume and air pressure.
  • Bottom wind: From the bottom of the grate.
  • Secondary air: Mezzanine distribution between the inner and outer tubes of the fire vent, and the secondary combustion of combustible gas in the combustion flaring.
  • Feeding motor: screw rod used to drive feeding system.
  • Feeding system: Feed biomass pellets into the combustion chamber.
  • Casters: For short-distance movement of the burner (use a forklift away from the distance to avoid damage to the rigid vibrating refractory layer).
  • Fuel: Pure woody biomass pellet fuel, diameter 8-10MM, length less than 30mm, heating value above 3500KCal, ash content less than 3% (large tonnage burner can burn 30MM biomass briquette fuel).

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Jinan Shanghangda Machinery Co., Ltd. , https://www.jnwoodmachine.com