Elevator Cross Flow Fan

Elevator Cross Flow Fan-40 series

Introduction:

In elevators, where passenger comfort and safety are paramount, the DC Cross 30 Fan excels as an ideal ventilation solution. With its compact size, powerful performance, and advanced features, this fan significantly enhances the airflow and ensures a refreshing environment within elevator cabins and shafts. Whether it’s a busy commercial building, a residential complex, or a public facility, the DC Cross 30 Fan’s exceptional performance and reliability make it the go-to choice for elevator ventilation needs. Elevate

your elevator experience today with the DC Cross 30 Fan, where innovation meets efficiency!

Unveiling the Specifications:

The DC Cross 30 Fan is specifically engineered for elevator applications, offering a wide range of sizes to suit diverse requirements: 98mm, 108mm, 134mm, and 37.5mm. With a rapid rotation speed of 3000 RPM, it creates a dynamic airflow that enhances ventilation within the elevator shaft. The fan’s maximum static pressure of 2.9mmH20 ensures optimal air distribution, while the maximum airflow capacity of 0.7 to 24dBA guarantees a refreshing and tranquil atmosphere. Furthermore, weighing only 220 grams, this fan effortlessly blends power and portability.

The Advantages of Cross Flow Fan Technology:

1. Cutting-Edge Impeller Design:

At the heart of the DC Cross 30 Fan lies its innovative impeller. The elongated barrel-shaped impeller, combined with large intake and exhaust openings, ensures efficient air movement and minimizes noise generation. By optimizing the blade structure and airflow path, the fan achieves an exceptional balance between performance and acoustics.

2. Precision Dynamic Balancing:

To deliver a smooth and vibration-free operation, the impeller undergoes meticulous dynamic balancing. By utilizing advanced hardware processing techniques, the impeller achieves exceptional balance standards. This precision balancing not only reduces noise but also extends the fan’s overall lifespan, providing reliable and efficient performance throughout its operational life.

3. Rigorous Engineering Testing:

Prior to production, the impeller of the DC Cross 30 Fan undergoes extensive engineering testing. Through the combination of software simulations and manual assessments, each fan blade’s design is carefully refined to ensure consistent airflow and minimal noise generation. The fan’s aerodynamic properties are meticulously optimized to eliminate variations caused by differences in distances, angles, or blade shapes, resulting in a uniform noise characteristic throughout its operation.

4. The Heartbeat of the Fan: The Motor:

The motor is the driving force behind any fan’s performance, and the DC Cross 30 Fan is no exception. Recognizing the motor’s crucial role, our engineers have allocated a significant 60% of space within the fan design to accommodate the motor’s load capacity. This generous space allocation allows for optimal motor performance and reduces the risk of excessive load demands. By ensuring a 58% utilization rate and allocating 42% of space, we guarantee safe and efficient operation while avoiding potential issues such as excessive noise, increased temperatures, and decreased product lifespan.

FQA

The cross flow fan has a very complex internal structure. Although the circumferential direction of the impeller is symmetrical, the air flow is asymmetric, and its relative velocity field and absolute velocity field are unstable. The flow medium enters the impeller twice, and the flow situation of the rotor impeller changes constantly along the circumferential direction. At the inner side of one side of the impeller circumference, there is a vortex that can control the entire airflow, namely the eccentric vortex of the so-called cross flow fan. The vortex center is somewhere in the inner circumference of the impeller, and moves along the circumferential direction with the different throttling conditions. It is the existence of this eccentric vortex that causes the crossflow. Under a certain working condition, due to the enhanced control force of eccentric vortex when the cross flow fan is rotating at high speed, the gas in the cross flow fan cannot be discharged or inhaled normally, and the test system has an abnormal condition, which is called surge.
If the area of the vent is small, the resistance of the resistance layer is large, and the flow in the pipe is small, the working requirements for the cross flow fan are low, and the role of the eccentric vortex is not obvious under small flow. However, when the speed is high and the area of the vent is large, the control force of the eccentric vortex is enhanced, the gas in the cross flow fan cannot be discharged or inhaled normally, the test system has abnormal conditions, and the cross flow fan has surge phenomenon and surge period, which are specifically shown as follows:
(1) The noise increases.
When the cross flow fan works normally, the noise is relatively small. However, when surge occurs, the cross flow fan will emit a dull buzzing sound and a sharp roaring sound from time to time, which is relatively loud;
(2) Vibration intensifies.
When the cross flow fan surges, the driving belt of the power trolley shakes severely and the whole test device vibrates obviously;
(3) Reading is difficult.
When the cross flow fan surges, the values displayed by the micro pressure meter and the speed torque meter change rapidly, with a large range and amplitude, showing periodic changes. In this case, it is very difficult for the tester to read. In general, the maximum value of the indication is the normal working value of the cross flow fan, and the surge phenomenon almost disappears. However, in a cycle, it is short-lived and unstable. The minimum value of the indication is the reading when the surge phenomenon is most serious.