How to choose a DC fan chassis manufacturer? Specially check the driver and measured energy consumption
Direct answer: When choosing a DC fan case manufacturer, in addition to looking at the case and fan, you should also focus on checking the matching of the driver and motor, the input power of the complete machine under common operating conditions, the compatibility of the control interface, and whether the spare parts and information of the driver and control board are delivered with the equipment. The difference in DC solutions is often not in the appearance of the cabinet, but in the driver and control interface. If the manufacturer can only provide fans and cabinets, and the drivers must be purchased and assembled, the division of responsibilities and response speed will become problems when a failure occurs later.
Aili Industry isThe motor, fan and control supporting equipment of the DC fan chassis can be customized and configured through communication. The project is usually required to first clarify the design working conditions and common working conditions, and then provide the corresponding input power data and control interface description of the whole machine.
Energy saving data should have comparison boundaries
Inquire about the air volume, external static pressure and input power of the complete machine under design and common working conditions. If the manufacturer provides an energy saving comparison, it should also be confirmed whether the old and new equipment are measured under the same terminal air volume, filtration status and operating hours. A single percentage outside of these conditions cannot be used in a project budget.
You can ask the manufacturer to provide two tables: one is the air volume, external static pressure, rotation speed and complete machine input power under design working conditions; the other is the corresponding data under common working conditions. Both tables should indicate filter status and valve opening. If the system end configurationFor HEPA/ULPA high-efficiency filters , the initial resistance of the filter and the resistance after use will affect the working point. When the process requirements are higher, it can be evaluatedDoes the ULPA ultra-high efficiency filter meet the requirements?
From the fan law, the air volume is proportional to the rotational speed, and the shaft power is proportional to the cube of the rotational speed. The rotation speed is reduced by 20%, the air volume is reduced by approximately 20%, and the shaft power is reduced to approximately 51% of the rated value. This is the fundamental reason why speed regulation can save energy, but the actual energy saving depends on the load curve, system resistance characteristics and speed regulation strategy. Manufacturers should be able to explain this logic instead of just promising a fixed power saving ratio.
Control details determine access
The speed control signal range, communication protocol, fault output, protection strategy and driver heat dissipation requirements need to correspond to the on-site control cabinet one by one. In particular, retrofit projects should confirm whether the interlocking logic of the original system can be retained and who is responsible for locating and replacing components in the event of a failure.
You can ask the manufacturer to provide a control point table, indicating: speed control signal type (analog, PWM or communication), signal range and terminal definition, start and stop mode, operating feedback type, fault feedback type, action after disconnection, and minimum operating air volume. 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 is also necessary to confirm whether the operation feedback and fault feedback are independent signals or obtained through communication. These details are confirmed during the inquiry stage, which is more cost-effective than modifying them after the equipment arrives on site.
Clean room ceiling air supply is comparableFFU 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 control interfaces and linkage logic of these devices and the DC fan chassis are different, and should be clearly specified on the system flow chart.
Later maintenance is also a procurement cost
Fault diagnosis, spare parts identification and wiring information for DC drives and control boards should be delivered with the equipment. If the project has multiple pieces of equipment, it is recommended to agree on a unified model and spare parts compatibility range; solutions with similar initial purchase costs may have different subsequent maintenance complexity.
You can ask the manufacturer to provide: driver model and brand, control board model, key spare parts list, fault code description, wiring diagram and terminal definition. If the manufacturer can explain the fault diagnosis method of the drive and the steps to deal with common faults, subsequent maintenance will be more confident. If the drive is an outsourced part, the spare parts supply cycle and technical support channels should also be confirmed.
Drive heat dissipation is also an issue that is easily overlooked during maintenance. When the driver is installed in the box, the temperature inside the box may be high; when installed in the control cabinet, the space and ventilation conditions inside the cabinet must meet the requirements. The heat dissipation method should be confirmed during the selection stage to avoid frequency reduction or shutdown due to overheating in the later stage.
Require full delivery boundary
When purchasing, the driver, wiring data, performance records, drawing confirmation and debugging cooperation should be included in the list to facilitate comparison of the supplier's actual delivery capabilities. The quotation should list: box, fan, motor, driver, control line, flange, shock absorber, random information, debugging services, which ones are included in the quotation, and which ones need to be purchased separately.
If the project involves non-standard customization, you should also confirm whether the direction of the air outlet, box size, inspection surface, and control interface can be implemented on the drawings. Customization is not a verbal promise, but a specific mark on the drawing. Whether the manufacturer can provide equipment diagrams, electrical diagrams and control point tables during the planning stage is an important basis for judging its delivery capabilities.
Using work point data to determine professionalism
Aili Industry isthe DC fan chassis can be customized and configured through communication. The motor, fan and control supporting parts of When evaluating a manufacturer, you can observe whether it actively inquires about: design air volume and common air volume, corresponding external static pressure, operating period, filter status, on-site power supply and control interface. If the manufacturer only replies with a fan model and price, it means that it does not match the project working conditions.
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.
