1. Overview

The induction fan with new ventilation concept adopts the concept of jet induction ventilation system, which is composed of air supply fan, multiple induction fans (or pipeline induction fans) and exhaust fan. The main use of theory comes from aerodynamics, with a small amount of high-speed jet gas disturbance characteristics, disturbance jet can effectively induce the surrounding still air, and drive air circulation. Under the condition of no air duct, according to the law of conservation of momentum: the center velocity of the jet gradually decreases from the exit point, but the width of the jet gradually increases, and the amount of air around the induced gradually increases. According to this principle, the fresh air is induced and sent to the second fan (nozzle) installed in the first effective range, and then the fresh air is sent to the necessary area, and finally discharged to the outside by the exhaust fan. And with the appropriate system design layout, to achieve the best indoor airflow organization, to achieve efficient and economical ventilation effect.

The traditional underground garage ventilation are used in the warehouse layout of low-speed air duct delivery system, its biggest disadvantage is: the size of the duct section is large. Gas tends to gather at the dead corner of the far-filled air flow: the cold height of the garage is generally low, and the use of low-speed air ducts has a sense of pressure; The installation workload is large, the investment is high, and the operating cost is high. There are also buildings that cannot be nurtured at all due to their own characteristics.

The induced fan has become a kind of ventilation equipment widely used in large spaces such as parking lots, warehouses, stadiums and workshops in industrialized countries such as Europe, America and Japan. The ventilation equipment has been used as a regular underground parking lot ventilation method, and it has been incorporated into the construction equipment design specifications, and is gradually being promoted and popularized.

2、 Characteristics of YDF series induced draft fan
(1) Simple and flexible design: The system planning is simple, the design changes are flexible, easy to modify, and the chance of errors is small.

(2) Space saving: No need for complex and huge pipelines like traditional ventilation, with a maximum diameter of only 35CM spiral air duct

(3). Easy to install: No need for huge air ducts, simple construction, easy and flexible installation; The installation location is targeted and easy to use.
(4) New nozzle: It adopts a flexible nozzle that can be adjusted in all directions, and the jet direction can be adjusted freely, which is simple, convenient, and flexible.

(5) Efficient and energy-saving: By utilizing physical characteristics to induce air flow, electricity is saved, operating costs are low, equipment size is small, and installation costs are reduced.
(6) Easy maintenance: The induction fan is equipped with an inspection door and a filter screen, which is easy to clean and convenient for fan maintenance and repair
It's convenient.
(7) High ventilation quality: induces complete gas circulation without blind spots, reduces exhaust gas concentration, avoids pollution accumulation, and improves air quality.

3、 Application of YDF type induced draft fan
(1) Underground parking lot: Due to the emission of carbon monoxide and other pollutants from cars, underground parking lots require ventilation and air exchange. However, in addition to large beams and columns, there are also a large number of fire water supply pipelines, lighting wires, and so on in underground parking lots. Therefore, traditional ventilation pipelines are often difficult to arrange, and the ventilation quality is not very high. Only local ventilation with significantly high concentrations of C0 and C02 can be achieved. Choosing induction fans can guide the incoming outdoor fresh air to the entire space. The new induction fan has become the best choice for ventilation and air exchange in underground parking lots.
(2) Sports centers, exhibition halls, indoor swimming pools, airport lobbies: Large area, high roof sports centers have high requirements for indoor airflow organization, and winter hot air delivery is also a common and difficult problem to deal with. YDF induction fans can quickly adjust the temperature of the air conditioning area to the required state, eliminate air supply dead corners, and solve the problem of hot air delivery.
(3) Various warehouses and warehouse style supermarkets: The YDF series induction fan is an air conveying system that is particularly suitable for tall spaces such as warehouses and warehouse style supermarkets. Due to the high internal shelves, traditional air conditioning systems can only be placed between shelves, resulting in a large temperature difference between the top and bottom. This not only affects the quality of goods, but also creates blind spots where air supply cannot reach. The YDF induced draft fan is designed and installed to be flexible and maneuverable, allowing for the organization of airflow as needed and tailored to different types of cargo
Design the object.
(4) Industrial workshop: Modern industrial workshops often require large air duct systems to handle large air conditioning loads. However, due to the influence of operating equipment such as cranes in the factory workshop, the arrangement of air duct systems and air supply outlets is limited, and the air supply effect, especially in winter, is often unsatisfactory. The YDF series induced draft fan can not only provide fixed-point air supply, ensuring efficient and energy-saving operation of the air conditioning system, but also quickly achieve the required room temperature through the transmission of the induced draft fan. Adjustments can also be made based on changes in the factory's manufacturing process.