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The double return air clean workbench organizes local air circulation through filtered air supply and return air channels. Aili Industrial configures the work area around the two-person operation range, the parallel position of the workpiece and the return air path, so that the filtered air can circulate in the work area and reduce dependence on external air supply.
Number of operators |
Airflow pattern |
Air supply method |
Custom support |
|---|---|---|---|
Double |
loop filter |
Filtered supply and return air channels |
Size, structure and function customization |
The workbench processes the air through the primary filter and the final high-efficiency filter. The filtered clean air is sent to the work area and then returned to the front end of the filtration system through the return air channel to form a cycle.
For double workstations, the air supply and return performance of the left and right sides and the middle position need to be checked at the same time. The return air structure needs to match the width of the work area, internal air duct and filter resistance. Unreasonable air duct design may lead to poor return air and affect the air flow distribution in the work area. For specific air volume calculations, please refer to How to convert face wind speed and air volume? , please refer to the working point reading method Why should we look at the complete performance curve when selecting FFU?。
Configure the table height and work space according to the sitting or standing posture of two people, the size of the workpiece and the number of tools.
When two people operate different workpieces respectively, they should clearly identify their respective tool areas and shared material areas. When working together on the same workpiece, hand movements, fixture positions and handover methods should be checked to reduce the obstruction of key operating positions by human movements.
The work surface facilitates workpiece placement, daily cleaning and surface inspection. The side enclosures and operating openings together form a working area. The specific material, table load-bearing and structural dimensions can be confirmed according to the project.
When it is necessary to install tooling or supporting equipment, the fixed hole positions, threading positions and accessory interfaces can be communicated. Please refer to the table size and operation matching How does the size of the workbench match the actual operation?。
Match the fan, motor and air duct according to the air supply area, filter resistance and target wind speed, taking into account the effective working area and operation adjustment requirements.
Filter selection needs to jointly clarify efficiency, size, installation sealing and replacement methods. Related configurations can be found HEPA and ULPA filters , select matching products based on particle control requirements and system resistance. How to read the filter efficiency report can be found in How to read the test particle size in the filter efficiency report?。
Fan start and stop, wind speed adjustment, lighting and status display can be configured as needed.
For electronic components that are sensitive to static electricity, grounding, anti-static surfaces, and static elimination configurations can be evaluated and matched with personnel protection and site conditions. For workstations that run for a long time, the actual power of the DC or EC drive solution can be further checked.
After the air is initially filtered, it is sent into the filtration system by the fan, then enters the work area through the terminal high-efficiency filter, and then returns to the front end of the filtration system through the return air channel to form a cycle.
Air enters→primary filter→fan supply→end high-efficiency filter→double-station air supply→return air channel→circulation
The movements of people, tools and workpieces in the work area may change the local air flow. The performance of the work area should be checked based on the actual placement and working status. The influence of operating arms can be referred to How will operating the arm interfere with the air supply to the workbench? , item occlusion can be referred to Will stacking items on the workbench create a pollution dead zone?。
project |
Configuration instructions |
|---|---|
Product form |
Double return air clean workbench |
Airflow pattern |
Circulation filtration, filtering air supply and return air channels |
operating position |
Front two-person operation |
Work area size |
Confirm based on the workpiece, tools and two-person operating range |
effective working depth |
Determine based on workpiece position and air supply coverage |
clean target |
It can be configured according to the ISO level 5 work area target, and accepted according to the agreed particle size and testing status. |
Filtration system |
The primary effect is matched with the terminal high-efficiency filter |
Return air structure |
The return air channel matches the filtration system and is confirmed according to the plan. |
Working wind speed |
Configure according to process requirements, and the speed adjustment range is confirmed according to the selected plan |
Countertop and cabinet |
Material, load-bearing and surface treatment are confirmed according to the project |
fan drive |
Configure according to air volume, resistance and speed adjustment requirements |
Control function |
Start/stop, speed adjustment, lighting and status display configured on demand |
Process interface |
Sockets, wiring holes and tooling fixing positions can be configured as needed |
Power and power |
Confirm by selected model and electrical requirements |
Test items |
Wind speed, particle concentration, filter leak detection and electrical inspection are carried out as agreed. |
Filter efficiency and work area cleanliness are different indicators, and equipment performance needs to be confirmed through complete machine testing. The difference between cleanliness level and filtration efficiency can be found in What is the difference between cleanliness level and filtration efficiency?。
Two-person collaborative assembly |
Precision component inspection |
Optical component handling |
Instrument component assembly |
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Duplex parallel operation |
Assembly and inspection collaboration |
Clean parts handling |
Clean handling of non-hazardous materials |
Clean benches are mainly used for product protection and do not provide the personnel and environmental protection that biological safety cabinets have. When infectious materials, toxic volatiles, or other hazardous materials are involved, equipment should be selected based on the risk. Please refer to the specific boundaries Does the clean workbench protect the product or the operator? and Can an open workbench be used for hazardous materials operations?。
When two people operate different workpieces respectively, the tool and material areas should be clearly defined. When working together on the same workpiece, hand movements, fixture positions and handover methods should be checked to reduce the obstruction of key operating positions by human movements.
When the return air channel is blocked by tools, materials or equipment, the circulating air flow is blocked, which may affect the wind speed and cleanliness of the work area. The obstruction on the return air path should be reduced according to operational needs to allow the airflow to maintain the designed circulation path.
After the work area is deepened, it is necessary to confirm the air flow and cleanliness performance of the operating area based on the filter air outlet surface, side structure, wind speed and actual workpiece position.
During installation, confirm the equipment's air inlet position, filter replacement path, fan maintenance position and front operating channel, and keep the space around the air inlet clear. Insufficient maintenance channels will increase subsequent expenditures. This is reflected in what later expenses will be increased due to insufficient maintenance channels . There is a more detailed analysis of
Clean the countertop, side enclosures and operating area according to process requirements to avoid residues affecting subsequent operations.
Maintain the primary filter according to the usage environment, and determine the maintenance needs of the terminal filter based on pressure difference, operating wind speed, cleanliness testing and filter status. After replacement, the installation seal and related performance should be rechecked. To judge the initial resistance and final resistance, please refer to What are the initial resistance and final resistance used to judge? , sealing inspection can refer to What should be checked when cleaning equipment is accepted?。
Return air grilles and return air channels should be inspected regularly to prevent dust accumulation or material obstruction from affecting the circulating air flow.
Aili Industrial has a manufacturing base of 30,000 square meters, covering R&D and manufacturing links such as motors, fans, control systems, sheet metal, air filters and complete machine assembly.
For the two-person return air workbench project, the filter area, fan working point, return air channel, table structure and control function can be checked together to support product selection, non-standard design and batch project matching.
manufacturing link |
Project support |
|---|---|
Motors and fans |
Matching dual-station circulating air supply, filter resistance and speed adjustment requirements |
air filter |
Check efficiency, effective dimensions and installation sealing |
control system |
Configure start/stop, speed adjustment, lighting and operation display |
Sheet Metal and Structure |
Implement work area, return air channel, table top and process interface |
Complete machine assembly and testing |
Organize production and inspection according to confirmed drawings and technical requirements |
The return-air type workbench organizes circulating airflow through the return air channel, reducing dependence on external air supply; the airflow of ordinary horizontal flow workbench passes through the workpiece and is discharged directly. The selection should be based on site conditions and process requirements.
Side-by-side positions should be arranged based on the airflow direction and process to reduce front and rear obstructions, and separate tool areas and shared material areas should be planned. It is not advisable to pile items on the return air path.
When used by a single person, it should also be operated according to the equipment requirements. If it is necessary to deactivate part of the air supply area independently, there must be corresponding structural and control design, and the impact on adjacent workstations must be checked.
Grounding, anti-static flooring, and static elimination configurations can be evaluated based on component sensitivity, and inspection requirements can be clarified by project.
It should be combined with pressure difference, wind speed, cleanliness detection and filter status judgment. Recheck sealing and related performance after replacement.
Clarifying the workpiece size, placement direction, cleaning goals and operating procedures will help determine the work area and return air configuration suitable for actual use conditions.
Contact us immediately to obtain the product information and technical parameters of the double return air clean workbench.
→ Consult the double workstation and return air structure → Submit artifacts and tool layout
→ Learn about filtering and speed regulation configuration → Communicate about non-standard and equipment matching
pass Aili Industrial Technology Consulting , communicates product selection and customization needs.
Aili Industry - From core components to complete clean workbench machines, it provides products and technical support for two-person assembly, inspection and collaboration stations.
Aili industrial double return air clean workbench adopts double work stations and filtered return air structure, which is suitable for collaborative assembly, inspection and material sorting. Supports the configuration of work area size, filtration system, return air structure, table bearing and control functions, and can confirm the configuration according to workpiece size, return air location, filtration requirements and on-site installation conditions.
