Pneumatic Office Chair Video
Videos related to pneumatic office chairs mainly focus on revealing their principles and popularizing knowledge about potential hazards.
Some videos uncover the principles of pneumatic chairs. For example, the video titled 'The Lifting Chair You Sit on Every Day May Be a Time Bomb? Unveiling the Brutal Principle of Pneumatic Chairs' delves deeply into the internal mechanism that enables pneumatic chairs to lift and lower. The key to the lifting and lowering function of a pneumatic chair lies in its internal pneumatic lifting rod structure. The pneumatic lifting rod usually consists of two cylinders, an upper and a lower one, controlled by a valve in the middle. When a person sits on the chair and exerts pressure on the seat, the gas in the upper cylinder is compressed, increasing the pressure. When the pressure reaches a certain level and overcomes the resistance set by the valve, the valve opens, allowing the gas to enter the lower cylinder and causing the chair to lower. Conversely, when the person gets up and leaves the chair, the pressure in the upper cylinder decreases, and the gas in the lower cylinder flows back to the upper cylinder through the valve, making the chair rise. Through this adjustment of air pressure and the flow of gas, the chair can be lifted and lowered flexibly to meet people's different usage needs.
Other videos highlight the safety hazards of pneumatic office chairs. The video 'The Office Chair You Sit on Every Day Is Actually a High-Pressure Bomb That Could Explode at Any Time...' details the horrifying situation of a lifting chair suddenly exploding. Taking the experience of Ms. Liu in 2013 as an example, when she was sitting on an online-purchased lifting swivel chair and blow-drying her hair, the pneumatic rod burst from the bottom, and a steel rod with a diameter of 3 centimeters pierced through her body, causing extremely serious injuries. Moreover, the video points out that over the past decade or so, more than forty similar tragedies have occurred in China. The main culprit behind these hazards is the pneumatic lifting rod. The qualified pneumatic rods produced by legitimate manufacturers are filled with high-purity inert nitrogen inside. This gas has stable chemical properties and is not prone to reacting with other substances, ensuring the safety of the pneumatic rod during normal use. However, some unscrupulous manufacturers, in order to reduce costs, replace high-purity inert nitrogen with ordinary compressed air. Ordinary compressed air contains components such as oxygen. Under high-temperature, high-pressure, or long-term use conditions, it is prone to oxidizing reactions with the metal parts inside the pneumatic rod, causing the internal pressure of the pneumatic rod to increase abnormally and thus triggering an explosion, posing a huge danger to users.
