Yuhai Company is engaged to research
and development of piezoelectric products
and related piezoelectric products, the related piezoelectric products includes the piezo sensors and transducer.
The ultrasonic transducer is a kind of transducer that converts the ultrasonic signal into electric signal, or vice versa. Ultrasound transmitter and receiver is a transducer that can transmit and receive ultrasound. Ultrasound sensor is a kind of sensor, in essence, it is also a transmitter and receiver. The working principle of this kind of equipment is similar to that of radar and sonar. Active ultrasonic sensors can emit and receive reflected waves, and determine the distance of the target by measuring the time interval between transmission and reception. Passive ultrasonic sensor is actually a microphone that can convert ultrasonic signal into electrical signal.
Ultrasonic Sensor,Piezo Sensor,Ultrasonic Piezo Disc,Ultrasonic Piezo Elements Zibo Yuhai Electronic Ceramic Co., Ltd. , https://www.yhpiezo.com
According to the working principle and materials used, the ultrasonic transducer has piezoelectric transducer, electrostatic transducer (capacitive transducer), magnetostrictive transducer, electromagnetic acoustic transducer, mechanical transducer and other types [1].
There is air conditioning in the winter and there is heating in the winter. But we are very "boring".
In today’s world, living conditions have significantly improved, and the abundance of material life has brought great convenience to our daily routines. However, as we enjoy comfort from the heat and cold, new challenges have emerged. For example, in a family of three, it's not uncommon for everyone to catch a cold due to close contact and shared environments.
With the widespread use of air conditioners in homes and offices, the occurrence of "air conditioning diseases" has been on the rise, especially during summer. The number of people suffering from respiratory and allergic diseases continues to grow, with many cases directly linked to air conditioning. Staying in an air-conditioned room for long periods often leads to feelings of chest tightness and shortness of breath—symptoms commonly associated with this condition.
Recently, Ms. Chen’s family experienced this issue firsthand. With the weather being extremely hot, they initially had no air conditioning and struggled to sleep. Once they turned on the air conditioner every night, they kept the doors and windows closed to save energy, unaware of the risks. Soon after, Ms. Chen developed flu-like symptoms and a dry throat. Her son also caught a cold, and her husband began experiencing allergic rhinitis with nasal congestion, coughing, and even chest tightness. When they finally visited the hospital, the doctor explained that their prolonged stay in a poorly ventilated, air-conditioned room had led to cross-infection.
Older adults are particularly vulnerable to these issues. Their bodies struggle to regulate temperature, making them more prone to colds, fevers, and even serious lung infections. Many seniors spend too much time indoors doing chores or playing games, which weakens their immunity. Improper use of air conditioners further increases the risk, especially for the respiratory system. Cold air can easily irritate the delicate lining of the nose and throat, causing coughing, sneezing, and other discomforts.
Moreover, the low humidity in air-conditioned spaces can dry out the mucous membranes of the eyes and nose, creating an ideal environment for germs and viruses to thrive. This makes people more susceptible to allergies and respiratory problems.
Interestingly, while air conditioning brings its own set of health issues in summer, heating systems can cause similar problems in winter. Closed windows and dry indoor air reduce air circulation and weaken the immune system, leading to symptoms like chest tightness, dryness, and irritability. This condition is known as "heating sickness."
The primary cause of heating sickness is excessive dryness and water loss from the body. Normally, the body loses about 1000 ml of water per day, but heating can accelerate this process. Prolonged exposure to dry indoor environments can lead to reduced mucus production, making the respiratory tract more susceptible to infection and triggering conditions like bronchitis or asthma.
For the elderly, heating sickness can be even more dangerous. It can increase blood viscosity, raise the risk of hypertension and angina, and worsen existing heart conditions. Sudden temperature changes can also trigger coronary issues, making it crucial to manage indoor heating carefully.
Bored! Stuffy! Stuffy!
Pass! Pass! Pass!
Important things to say three times!!!
To combat these issues, one of the simplest solutions is regular ventilation. However, in areas with high pollution, opening windows may not be safe. That’s where a fresh air system comes into play. A fresh air system is an independent air treatment system that includes both supply and exhaust functions. It can be either ducted (suitable for large spaces) or ductless (ideal for homes). These systems filter incoming air and expel stale air, ensuring clean and fresh indoor air without letting outdoor pollutants in. Not only does it improve ventilation, but it also helps reduce the risk of "air conditioning disease" and "heating sickness," making it a smart investment for healthier living.