The revolving door entrance is the most cost-effective building entrance

In the 1920s in Italy, several winged doors were made, which were designed to swing in both directions. Later, a Swedish revolving door manufacturer introduced a new two wing door, adding an electric motor and booth to the original design. At that time, there were also three wing doors and four wing doors. Three wing revolving doors have become very common in airports and hotels. Smaller doors are suitable for carrying luggage, while revolving doors with a diameter of 4.2-5.4m are more convenient for luggage carts to enter and exit. The use efficiency of four wing doors is higher, and the flow of people passing through is greater. At a speed of 10r/min, a four wing revolving door with a diameter of 2m can allow people to walk at a speed of 2400 (people) per hour in both directions at normal walking speed. Four wing revolving doors are most widely used in office buildings and hotels. Wuyimen has not been developed and still has no sales. Two special designs were proposed in the original patent: one is that the door body can move to the side; Another type is the "breaking through the door" circular strength. These designs were already popular before the popularity of foldable doors today. The combination of movable and foldable doors on the side of the door body increases the direct opening ability of the revolving door by nearly 50%. To ensure that in the event of a fire in the building, the revolving door still serves as a fast track for entering and exiting the building, and to ensure that personnel can escape from the building in dangerous situations, the door leaf of the revolving door is designed to be foldable, so that each individual door leaf can be released or rotated by an angle in the opposite direction of rotation when under pressure, forming a passage. Many countries or regions in the world have included this performance requirement in their safety regulations.
In the 1940s, revolving doors were equipped with speed control, allowing the door's speed to be controlled as required. With the development of industrialization and automation, various automatic door revolving doors, revolving doors with card reading and recognition safety performance, automatic doors with various safety protection sensors, and many special-purpose revolving doors have been added to the original manual four wing door series, which has continued to develop and led to the emergence of automatic revolving doors.
The development of automatic doors is not only due to their noise and dust resistance, but also to their energy-saving characteristics. The conclusion drawn from the research conducted by the American Society of Heating, Refrigerating and Air Conditioning Engineers in the United States is that revolving door entrances are the most cost-effective building entrances. For a common revolving door with a diameter of 2m and a height of 2.1m, each one only drives 1.7 cubic meters of air circulation when passing through. Due to the small heat exchange capacity of air, the energy-saving performance of revolving doors is very good.