What are the main parameters of the DC fan box? Don’t miss the driver and control interfaces
Direct answer: The parameter table of the DC fan box cannot only write the air volume and external static pressure. At least the power supply method, complete machine input power, speed range, control signal type, operating feedback and driver installation conditions must be indicated. Without these, the equipment may not be able to be connected to the control cabinet when it arrives at the site, or the speed may not be able to meet terminal needs after speed adjustment.
Aili Industry is discussingWhen configuring a DC fan cabinet , the project is usually required to provide both performance parameters and control point tables, and then check whether the driver, fan and cabinet interfaces match.
The performance table covers at least common working conditions
The data of design working conditions are used to check the air supply capacity, and the data of common working conditions are used to judge energy consumption. It is recommended to record the air volume, external static pressure, rotation speed and input power of the whole machine corresponding to each working condition, instead of only reporting the rated power of the motor. The noise should also correspond to the corresponding rotation speed.
If only design conditions are provided, the project can only confirm peak capacity and cannot evaluate long-term operating power consumption. If only common working conditions are provided, it is impossible to confirm whether the system can meet the requirements under the most adverse conditions. Both working conditions should indicate the filter status and valve opening, especially the end configuration of the system.HEPA/ULPA high efficiency filter . The initial resistance and resistance at the end of use of the filter will affect the working point, and the selection should be calculated based on the pressure difference allowed before maintenance. When the process requirements are higher, it can be evaluatedDoes the ULPA ultra-high efficiency filter meet the requirements?
Electrical parameters must be accessible to the site
Some DC motor systems are input by AC power and then controlled by matching drivers. The control end needs to verify the range of analog or PWM, communication protocol, start and stop contacts, and fault output. Before the control signal is confirmed, it should not be considered that the new equipment can be directly connected to the original control cabinet.
There are three common types of speed control signals: analog (0-10V or 4-20mA), PWM and communication control (such as RS485/Modbus). The terminal definitions of different drives may be different. Please check with the electrical diagram and terminal description before on-site wiring. If the project requires the status to be read by the building control system, it should also be clear whether the operation feedback and fault feedback are independent signals or obtained through communication.
The signal table is more specific than 'Support Speed Adjustment'
It is recommended to write down the target signal type, control range, terminal definition and wire break handling. For example: 0-10V corresponds to 0 to rated speed, output dry contact in case of fault, maintain current speed or shut down after disconnection. In this way, the supplier can confirm the control panel configuration based on this, and the on-site acceptance can also be based on the same point list.
If you only write 'Support speed adjustment', the supplier may quote based on different configurations, which may lead to mismatched interfaces or missing functions in the future. The speed adjustment range of the DC fan box should cover the design working conditions and common working conditions. The minimum operating air volume is determined by the terminal demand, not by the minimum speed of the drive.
Confirm installation conditions with drawings
Aili Industry isDC fan box selection. The drive, fan and box interfaces can be discussed at the same time during Adding the air duct flange, power supply capacity, control point table and available maintenance space to the inquiry information can form an executable plan faster than providing 'how much air volume' alone.
Clean room ceiling air supply can be compared simultaneouslyFFU fan filter unit ; centralized management of multiple devices can be matchedThe FFU computer group control system realizes zone speed regulation and status monitoring. Protection of single process equipment can be consideredEquipment-side fan filter unit (EFU) . The final filtered air supply at the end of the air duct can beHigh-efficiency air supply outlet (HEPA BOX) . The division of labor between these devices and the DC fan chassis should be clearly stated on the system flow chart.
What parameters should be clearly stated when making an inquiry?
A complete DC fan box inquiry document should at least include:
Design air volume and common air volume
Corresponding external static pressure
Supply voltage and frequency
Input power of the whole machine (different working conditions)
Speed adjustment range and minimum operating air volume
Control signal types and terminal definitions
Operation feedback and fault feedback requirements
Drive installation location and cooling conditions
Duct flange, access space and installation dimensions
Specific structure and configuration options can be found inIt is confirmed in the fan box product catalog that non-standard projects should provide equipment or machine room drawings, and then shape them based on the determined working points and on-site interfaces.
