How does the size of the workbench match the actual operation?

The size of the workbench is the first parameter that comes into contact when selecting a model, but suitable size does not mean suitable operation. If the countertop is too large, it may exceed the effective air supply coverage; if the countertop is too small, the workpiece cannot be placed or there is insufficient operating space. The usable area is not equal to the effective clean protection area. The selection must be judged based on the workpiece, fixture, tool and operating action.

The following will start with the workpiece occupation, movement range, effective protection area, and maintenance space.

Draw operation occupancy in the layout diagram

The following content should be marked before selection:

• Maximum overall dimensions of the workpiece;

• The installation location and space occupied by the fixture or tooling;

• The location of commonly used tools;

• The range of movement and operating paths of both hands;

• Sensitive areas requiring protection.

By drawing these contents on the countertop layout diagram, you can visually see whether the countertop size is sufficient. If you only look at the appearance of the workpiece, you may ignore the space occupied by fixtures and tools.

Differentiate between areas that need protection and those that are just for staging

Not all areas on the countertop require cleaning protection. Some areas are used to place workpieces, and some are used to temporarily store tools or materials. What needs to be protected is the area where the product is actually exposed, not the entire countertop.

Separating the areas that need protection and those that are only used for temporary storage will help you to choose the size of the countertop and the scope of protection. If the determination of the protection boundary is not clear, you can see What are the prerequisites for purifying only key workstations? , first confirm the boundaries of sensitive links.

The relationship between table size and effective protection area

The size of the countertop is the overall size, and the effective protection area is the range that the airflow can cover. The two are not necessarily the same. The edge of the countertop may be outside the air supply boundary. If your hands reach the edge during operation, the product may not be effectively protected.

When selecting a model, you should confirm the relationship between the coverage of the air outlet surface and the size of the countertop to avoid overly large countertops with unprotected edges. To judge the effective air outlet area, please refer to How should we look at the effective air outlet area of ​​FFU? , the surface wind speed conversion can be referred to How to convert face wind speed and air volume?。

Operational actions should be included in size judgments

Workpieces may need to be flipped, rotated or moved during operations. The size of the table should meet the complete range of motion, rather than just selecting the size of the workpiece in the static state.

For example, if the workpiece itself is not large, but it needs to be turned over during operation, the table needs to reserve space for turning. If the operation requires both hands to reach in at the same time, the width of the table should also be considered accordingly. The influence of operating arms on airflow can be referred to How will operating the arm interfere with the air supply to the workbench?。

Table height and personnel operating posture

The height of the table affects the operating posture and fatigue level. Seated operation and standing operation have different table height requirements. When selecting, the height and operating habits of the personnel should be considered to reduce fatigue during long-term operations.

A table that is too high may cause your arms to hang in the air, while a table that is too low may cause you to bend over. If the workbench supports height adjustment, you can further confirm the adjustment range and method.

Tools and materials must not be placed to block airflow

The placement of tools and materials affects the airflow path. Tall boxes, vertical boards, and dense fixtures may block the air supply and create local airflow dead spots on the countertop.

When selecting the size of the countertop, a place for placing tools should be reserved to avoid placing tools on the air supply path. Please refer to the impact of stacking items on the workbench. Will stacking items on the workbench create a pollution dead zone?。

Countertop load-bearing and supporting structure

As the size of the countertop increases, the load-bearing requirements also increase accordingly. Heavier workpieces, fixtures or instruments require confirmation of table material, thickness and support spacing. Floor-standing workbenches and desktop workbenches have different load-bearing methods and should be selected according to the conditions of use.

For desktop workbenches placed on the desktop, the carrying capacity of the desktop also needs to be checked. For desktop workbenches placed on the desktop, the carrying capacity of the desktop also needs to be checked. For relevant judgments, please refer to desktop horizontal flow clean workbench . Loading instructions for

Maintenance space must be reserved simultaneously

The size of the workbench affects not only the operating area but also the maintenance access. Filter changes, fan maintenance and countertop cleaning require operating space. When the countertop is against a wall or side by side with other equipment, you should confirm that the maintenance channel can be opened normally.

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

Relationship to whole room and local schemes

The choice of the size of the workbench is related to whether it is a whole room solution or a partial solution. If the product is exposed on the countertop for a short period of time, the workbench plan can be evaluated; if the product is continuously exposed in multiple links, partial protection of the entire clean room or background clean area may be required.

For specific differences, please refer to Can a clean workbench replace an entire clean room? . For local protection methods of open workstations, please refer to How to establish a local clean area in an open workstation?。

Equipment selection and terminal matching

If it is confirmed after assessment that local protection is needed, please refer to Clean benches understand the different structures. Please refer to the room background air supply FFU clean air supply products , please refer to the local protection of the equipment side. EFU equipment side fan filter unit . The logic of division of labor between the two lies in The division of labor between device-side EFU and room FFU is explained in detail.

Filter selection should correspond to target particle size and actual resistance.The HEPA and ULPA filter pages have parameters for different levels of products. When selecting, check the efficiency of the specific model at the target air volume. If you are still unclear about the difference between space rating and filter efficiency, you can read What is the difference between cleanliness level and filtration efficiency?。

If multiple local devices need to be managed uniformly, they can be combined FFU group control system provides unified management.

Project judgment example

For a certain project, the tabletop was selected based on the size of the workpiece. After installation, it was found that the tools and fixtures had no place during operation and could only be placed on the air supply path. Adjustment method: Re-plan the placement of tools, replace the table with a wider surface and adjust the air supply coverage. After adjustment, the operating space and protection area meet the requirements.

Another project has a larger table, but the edge wind speed is lower. The investigation revealed that the edge of the tabletop was outside the air supply boundary. Adjustment method: Reduce the size of the tabletop or adjust the position of the air outlet surface so that the effective protection area covers the actual operating position. The edge wind speed is restored after adjustment.

These two situations illustrate that the size of the workbench should be comprehensively judged based on the workpiece, fixtures, tools and operating actions, and should not just look at the outer dimensions.

Key points for selection and acceptance inspection

Aili industrial equipment supporting support

The size of the workbench finally comes down to the workpiece, fixtures and operating actions. Aili Industrial provides clean workbench, clean booth, clean screen and related air supply filtration package. It can check the size of the workpiece, effective protection area and filter configuration based on the maximum shape of the workpiece, operating path and background conditions, and help judge whether the table can cover the actual operating position, rather than selecting based solely on the appearance size. Specific equipment can be viewed Clean workbench , local air supply can be referred to FFU clean air supply products , please refer to the filtration package HEPA and ULPA filters。