What are the requirements for internal cleaning accessibility of biomedical air-conditioning boxes?

The internal cleaning accessibility of biomedical air-conditioning boxes should be converted into inspectionable structural requirements, including accessible or removable areas, access methods on both sides of the coil, cleaning of the drain pan, and recovery conditions after cleaning. 'Easy to clean' itself is too general and cannot replace maintenance diagrams and operation paths.

Reverse the structure based on a real cleaning operation

List the surfaces and components to be touched, confirm where people or tools can reach after the door is opened, and whether the filter frame, water retaining parts and blocking parts are removable. Internal seams, protruding fasteners, and dead spots where water collects should be identified during drawing review. Whether the cleaning agent used is compatible with materials and seals must also be explained by the project party under the conditions of use.

Accessibility should cover the working opening, operating distance and tool access path; disassembly should cover the disassembly and assembly sequence, component weight and method of restoring sealing; recoverability should cover drainage, drying, reassembly and inspection before re-operation. The three requirements correspond to different stages of cleaning operations. You cannot just write 'the access door can be opened'. How to define the equipment and verification boundaries of pharmaceutical projects, please refer toHow to define the boundaries of equipment and verification work in the air-conditioning box of pharmaceutical clean workshop?。

Access doors and operating openings must cover critical areas

Access doors should be sized and positioned to cover the surfaces that need to be cleaned, not just for daily observation. The two sides of the coil, the water tray, the water baffle and the corners of the inner wall are areas that are easily overlooked during cleaning. The door opening angle, door frame height and hinge position also affect whether people or tools can reach it.

When arranging against the wall, please refer to how to leave the maintenance sideWhen a horizontal air-conditioning box is arranged against a wall, which side should be left for inspection? . The space required for internal cleaning and routine maintenance may be different and should be marked separately on the floor plan. For installation space and horizontal and vertical selection, please refer toWhat kind of space do horizontal air-conditioning boxes and vertical air-conditioning boxes require?。

Interior surfaces and seams should be easy to clean

The inner surface of the box should be as smooth as possible to reduce dust and water accumulation in dead corners. The way seams, fasteners and sealants are treated can affect cleaning results. Protruding screws, unsealed seams, and rough welds can all become residual points. The interior surface material should also be compatible with the cleaning agents used.

Differences in the inner surface of double-layer and single-layer box panels, please refer toWhat are the differences between double-layer box boards and single-layer box boards used in air-conditioning boxes? . For the selection of box board structure and insulation materials, please refer toWhat indicators should be used to determine the thickness of air conditioning box panels? . Whether the cleaning agent is compatible with the filter material, please refer toDo chemical filter media and on-site cleaning agents need to be confirmed for compatibility?。

The drain pan and drain must be cleanable

The drain pan is a location where condensation and impurities tend to accumulate and should be accessible from an access door or removable panel. The slope of the bottom of the pan, the location of the drain outlet and the cleaning space must be checked together. You cannot leave only one drain outlet without a cleaning channel. The water seal structure of the water receiving tray in the negative pressure section should also be convenient for inspection and water replenishment.

How to combine the slope of the water tray with the layout of the drain outlet, please refer toHow to combine the slope of the water pan of the air-conditioning box with the layout of the drain outlet? . Why does negative pressure drainage require water sealing? Please refer toWhy does negative pressure drainage of air conditioning boxes often require water sealing? . The direction of the drainage pipeline and the cleaning port should also be reflected in the structural drawing.

Removable parts must be able to restore the seal

For water baffles, filter frames, panels and sensors that need to be disassembled, the disassembly and assembly sequence and reassembly requirements should be stated. The ability to restore the original seal after disassembly is part of cleaning accessibility. If the seal is not tight after reassembly, the air tightness and cleanliness of the box may be affected.

For comparison conditions of box air leakage rate, please refer toUnder what pressure conditions should the air leakage rate of air conditioning boxes be compared? . For sealing and tightening of the filter installation frame, please refer toHow to configure the primary-efficiency and medium-efficiency filters of air-conditioning boxes in different stages? . Reinstallation inspections after cleaning should be included in maintenance records.

How to accept this request

The section and inspection space can be reviewed during the structural confirmation stage, and operation demonstrations of representative components can be performed if necessary. Cleaning procedures are still formulated by the user based on process risks. Just because the structure is suitable for cleaning does not mean that the cleaning effect verification has been completed. The originally agreed operation path cannot be blocked even after the site is placed against a wall or taken over.

For condition checks before starting the machine for the first time, please refer toWhat conditions need to be checked before the air-conditioning box is turned on for the first time? . How to change the debugging sequence from stand-alone to system linkage, please refer toHow to change the debugging sequence of air conditioning box from stand-alone unit to system linkage? . The structural acceptance record should be able to correspond to the equipment number and cleaning operation path.

Aili industrial supporting equipment

Aili Industrial can check the cleaning path based on the sheet metal, filter frame and complete machine assembly. It is recommended to provide cleaning methods and tool space requirements before manufacturing. Aili Industrial Manufacturing covers the independent R&D and production of motors and fans, control systems, sheet metal, air filters and complete machine assembly. The position of the access door, internal surface treatment, water tray structure and detachable parts can be matched in the same set; non-standard boxes can be adjusted according to cleaning procedures and on-site space.

Product form can be viewedAir handling unit andFan box page; clean air supply package can be combinedFFU fan filter unit andEFU equipment end fan filter unit verification; terminal particle filtration can be combinedHEPA/ULPA filter confirmation; when it comes to gaseous pollution control, you can communicate separatelyChemical filter solutions. The specific structural requirements, cleaning effect and delivery scope still need to be verified based on the corresponding configuration data and on-site working conditions. Actual results are subject to on-site inspection, cleaning operations and performance test results.

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Related questions and answers

Can 'ease of cleaning' be written into the contract as a technical requirement?
Too general. Opening dimensions, accessible areas, removable parts and restoration of sealing requirements should be translated into inspectable requirements for acceptance.

Do I need to leave clearing space for the drain pan?
need. The drain pan is prone to accumulation of condensation and impurities and should be accessible and cleanable from the access door or removable panel.

Can Aili Industries assist in checking cleaning accessibility?
The access door and removable parts scheme can be checked based on the cleaning procedures, tool space and box structure. The specific configuration needs to be confirmed according to the project requirements.

Related articles

1. How to define the boundaries of equipment and verification work in the air-conditioning box of pharmaceutical clean workshop?

2. When a horizontal air-conditioning box is arranged against a wall, which side should be left for inspection?

3. How to combine the slope of the water pan of the air-conditioning box with the layout of the drain outlet?

4. Under what pressure conditions should the air leakage rate of air conditioning boxes be compared?

Key points for selection and acceptance inspection