Household ventilators generally have five components: host, humidifier, mask, pipeline, and power supply.
Among them, the main engine is mainly composed of a motor, sensor, motherboard, control button, and HMI display LCD screen.
The functional principles of human respiration:
Inhalation: Contraction of respiratory muscles -- expansion of thoracic volume -- expansion of alveoli (forming negative pressure) -- inhalation of air from the outside world.
Exhalation: Relaxation of the respiratory muscles -- elastic contraction of the alveoli -- increase of pressure in lungs -- and exhalation of air.
It follows that the pressure difference between the expansion, contraction of the human alveoli and the atmospheric pressure forms the respiratory function. Therefore, the working principle of household ventilators is generally to control the turbine speed so that the airway pressure can reach the preset pressure and form pressure difference, so as to realize the forced or auxiliary breathing process.
The general working principle of the ventilator is shown in the following figure:
Household ventilators are small, typically with 2.4, 2.8, 3.5, or 4.3 inches screens.
At present, most ventilators on the market are equipped with buttons and knobs, among which the most common ones are those with buttons to start the machine and knobs to adjust air pressure, etc. Some of them can choose the working mode and adjust the parameters through a touch screen.
In contrast, the HMI display touch LCD screen is easier to use and more intuitive. It can even guide the end-user, making HMI display friendlier.
Because of color LCD screens, displaying parameters, texts, progress bars, and animation tips is possible, making it colorful and rich in content.
If an LCD screen of 3.5 inches or larger is used, the HMI display area would be larger enough to show historical data, curves, etc.
Through networking, data of the ventilator can be transmitted to the mobile phone terminal in real-time, which is convenient for users' family members to inquire.
Module recommended: STVI035WC-01
Size: 3.5 inches
Screen: wide-angle IPS
Color: 16 bit, 65k
Touch panel: capacitive touch screen
1. Medical level standards, meet CE Class B requirements.
2. Higher screen resolution. Data and graphics display would be more clear and exquisite.
3. Our smart TFT LCD screen provides an audio playback function. The voice broadcast function is available in order to make it convenient for senior users to understand and use data.
4. The function of offline speech recognition can be extended. Users can control through voice commands, which means it is more convenient.
At present, the volume of monochrome screens on the market is decreasing year by year, and the reduction of production capacity further leads to unstable supply and price increases. The color screen is just the opposite, the annual shipments are growing rapidly, but the price is decreasing year by year.
STONE TECH currently has a science and technology park with a construction area of 6,000 square meters in Wuhan, with 3 production lines and 100,000 pcs monthly capacity. We have independent R&D and production capabilities. Provide one-stop LCD screen HMI display solutions.
One of STONE TECH's advantages is that we can provide long-term stable supply while providing high-quality design and supporting services. And the price is only affected by exchange rate fluctuations, which have won the trust and praise of users.