Structure
of Household Ventilators
Household ventilators
generally have five components: host, humidifier, mask, pipeline and power
supply.
Among them, the main engine is mainly composed of motor, sensor, motherboard, control button and 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 ventilator is shown in the following figure:
Solutions
to HMI display of Ventilator
2.1
The Screen Size
Household ventilators are small, typically
with 2.4, 2.8, 3.5, or 4.3 inches screens.
2.2
The Functional Requirements
Touch Function
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 touch
screen.
In contrast, touch LCD screen is easier to
use and more intuitive. It can even guide the end user, making human-computer
interaction friendlier.
Display Function
Because of color LCD screens, displaying
parameters, texts, progress bars and animation tips is possible, making it
colorful and rich in content.
If a LCD screen of 3.5 inches or larger is
used, the HMI display area would be larger enough to show historical data,
curves, etc.
Networking
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.
Solution Recommended
Module recommended: STVI035WC-01
Size: 3.5 inches
Resolution: 320*240
Screen: wide angle IPS
Color: 16 bit, 65k
Touch panel: capacitive touch screen
Our Strengths
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 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.
More about STONE TECH
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 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 has won the trust and praise of users.
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