The applicable scenarios for the washable air filter with a mother-child frame are mainly centered around the requirements of medium-low pollution levels, frequent maintenance, and cost-effective reuse. Combining its characteristics of detachable cleaning and stable support of the mother-child frame, they can be classified into the following categories: 1. Household scenarios (core applicable scenarios) – Ordinary residential spaces: Suitable for living areas such as living rooms, bedrooms, and study rooms, and can be used in conjunction with wall-mounted air conditioners, cabinet-type air conditioners, and household fresh air systems. It can intercept common impurities such as dust, hair, and fluff, and the reusable cleaning can reduce the cost of household consumables. Especially suitable for families with elderly or children (reducing the hassle of frequent filter replacement). – Kitchen peripheral areas: Can be used in adjacent areas of the kitchen such as dining rooms and corridors. It can intercept small amounts of cooking-generated smoke particles and dust. Since the filter material can be washed, it can promptly remove oil residue and avoid filter blockage and odor (note: not suitable for direct use in high-smoke kitchen environments). – Old houses / rental property renovations: Suitable for old air conditioners and simple ventilation equipment.

I. Precautions Before Cleaning 1. Power off and stop the machine, safety first: Before cleaning, make sure to turn off the power supply of the corresponding air conditioner, fresh air system or ventilation equipment. Wait until the equipment has completely stopped running before proceeding. Avoid accidental startup of the equipment during the cleaning process, which could lead to personal injury or equipment failure. 2. Standard disassembly, protecting the structure: Follow the equipment manual to disassemble the sub-frame and filter assembly. First, remove the sub-frame along with the filter material from the main frame. During the disassembly process, handle with care and avoid forcefully pulling, colliding, to prevent deformation of the sub-frame structure and damage to the snap fasteners. Also, avoid premature damage to the filter material. 3. Check the condition and distinguish the situations: After disassembly, first check the filter material and the sub-frame. If the filter material shows obvious damage, fiber detachment, aging and hardening, or if the sub-frame framework is cracked or the sealing parts are damaged, there is no need for cleaning; directly replace the corresponding components. If the condition is good, proceed with the cleaning operation. II. Precautions during the cleaning process 1. Choose the right

To ensure the accuracy of the daily maintenance records of the air supply ceiling, a full-process control mechanism should be established from the three dimensions of “standardization before recording, standardization during recording, and verification after recording”, to avoid data distortion, omission or tampering. The specific measures are as follows: 1. Before recording: Uniform standards, clear requirements – Develop standardized record templates – The templates should include mandatory items (such as equipment information, maintenance time, pressure difference data, operators, etc.), reducing free-form filling items to avoid information loss due to inconsistent record formats. – Key data items should be marked with filling norms, for example: pressure difference values should be precise to 0.01 kPa, time should be precise to hours/minutes, and equipment status should be selected as “normal / abnormal” rather than vague descriptions. – Templates are version-managed (such as daily inspection forms, monthly filter maintenance forms, quarterly sealingity detection forms), and are associated with other records of the cleanroom operation system (such as cleanliness detection reports). – Conduct specialized training for operators – Training content includes: record filling norms, reading methods for key data (such as correct reading posture of the pressure difference meter), and description standards for abnormal situations

The review of the daily maintenance records of the air supply ceiling focuses on verifying the authenticity, completeness, logic, and compliance of the records, ensuring that they can truly reflect the maintenance status of the equipment and support the subsequent problem traceability. The specific review points can be divided into six core modules as follows: 1. Basic Information Module Review Points – Consistency of equipment information – Verify whether the equipment model, factory serial number, installation location (such as XX workshop XX grade clean area) in the ledger is consistent with the information on the on-site equipment nameplate, and prevent “account and reality mismatch”. – Confirm the specifications of the matching filters (initial efficiency / medium efficiency / high efficiency models, filtration efficiency, initial resistance), and check if they match the design parameters of the equipment, without any records of randomly replacing non-standard components. – Coding standardization of the ledger – Check whether the ledger number is compiled in accordance with the unified rules (such as year – area – equipment number), the coding is unique and searchable, and there are no duplicate or chaotic numbering situations. 2. Maintenance Execution Record Review Points – Compliance of maintenance frequency and time

The high-efficiency filters (HEPA/ULPA) for the air supply ceiling are made of ultra-fine fiber structure. They must not be washed, wiped forcefully, or blown with high pressure. Otherwise, the pore structure of the filter material will be damaged, resulting in filter material damage and leakage, and the filtering efficiency will be directly lost. The “surface cleaning” only targets the frame, outer mesh, and sealing rubber ring of the filter. The specific operation process is as follows: 1. Preparations before cleaning Stop the machine and cut off the power supply: Close the air supply ceiling fan and the corresponding power supply, wait until the fan completely stops before operating. Avoid air flow carrying dust particles into the deep layer of the filter material. Personnel protection: Operators must wear clean clothes, dust-free gloves, and protective masks to avoid skin oils and hair contamination of the filter and the clean room environment. Tool preparation: Prepare non-fibrous dust-free cloth, purified water (or clean room-specific neutral cleaning agent), and dust-free wiping rods. Do not use ordinary rags, detergent, alcohol, etc., which are corrosive or prone to shedding. 2. Cleaning process by parts Filter frame cleaning Dip a small amount of purified water into the dust-free

The record management for the daily maintenance of the air supply ceiling is a crucial part for ensuring the stable operation of the equipment, tracing the root causes of problems, and optimizing maintenance strategies. The recorded content should be comprehensive, accurate, and traceable, and it should be linked with the overall operation archives of the cleanroom. It specifically includes the following six modules: Equipment basic information module Core parameters of the air supply ceiling: equipment model, factory serial number, installation location (such as XX workshop XX area of the cleanroom), rated air volume, matching filter specifications (initial efficiency / medium efficiency / high efficiency models, filtration efficiency, initial resistance). Maintenance ledger number: unique ledger code compiled by year / area for easy archiving and retrieval. Daily maintenance execution record module Maintenance time: precise to year / month / day / hour, distinguishing daily inspections, weekly deep maintenance, monthly specialized maintenance, and quarterly sealingity tests. Maintenance personnel: operator’s name, position, with signature confirmation, clearly defining the responsible party. Maintenance content and results: Daily inspection: fan operation status (no abnormal noise, vibration, stable rotation speed), diffuser plate sealing condition, surface cleaning areas and used tools (such as dust-free cloth + purification water).

A clean bench is a basic equipment that provides a localized sterile and dust-free clean environment. Through the use of a fan to filter the air through an efficient filter, a unidirectional airflow is formed, isolating external contaminants and being widely used in various industries with high requirements for environmental cleanliness. The core of daily maintenance lies in ensuring the cleanliness effect and prolonging the equipment’s service life. 1. Core application fields Biomedical and life science field This is the main application scenario of the clean bench, used for sterile operation-related experiments and production. For example, cell culture, bacterial inoculation and purification, genetic engineering experiments, sterile formulation assembly, vaccine preparation, etc., it can effectively prevent samples from being contaminated by microorganisms and protect operators from harmful bacterial strains. Microbial detection and food industry In the sterile detection laboratories of food enterprises, it can be used for the isolation and cultivation of total bacterial count and pathogenic bacteria in food; it is also suitable for the preparation of probiotic preparations and sterile food ingredients, ensuring that the microbial indicators of the products meet the standards. Electronic and semiconductor industry It is used for the assembly, inspection and maintenance of precision electronic

The biopharmaceutical industry has extremely strict requirements for aseptic environments and prevention of cross-contamination. The ultra-clean workbench, as a key equipment for core processes such as sterile formulation production, bacterial strain operation, and cell culture, must strictly follow standardized operating procedures to ensure product quality complies with GMP (Good Manufacturing Practice for Pharmaceuticals) standards. This specification covers four parts: pre-operation preparation, operation control during the process, post-operation processing, and special scenarios. I. Pre-operation Preparation Personnel Preparation Strictly follow the changing procedures for the clean area in biopharmaceuticals: change shoes → remove outer clothing → put on clean clothing → wear a mask and gloves → hand disinfection (75% ethanol wiping, action ≥ 30 seconds). It is strictly prohibited to wear jewelry, watches, and long hair must be completely contained in a clean cap to avoid hair and skin debris from falling into the workbench. Avoid strenuous exercise, eating, and makeup 30 minutes before entering the clean area to reduce microbial emissions. Equipment Inspection and Self-Cleaning Appearance and condition: Check the workbench surface, inner wall, and air outlet grille for cleanliness, without residual stains or debris; check the equipment power supply, control panel for normal operation, and no abnormal alarm on

The service life of the embedded clean transfer window is not fixed and mainly depends on the material quality, usage frequency, maintenance level, and the cleanliness level of the environment. The industry-wide reference range is as follows: Main structure service life Stainless steel (304/316 stainless steel): Strong corrosion resistance and deformation resistance. Under normal maintenance, the main frame can last for 8-12 years. In some cases (low frequency use + regular maintenance), it can be extended to 15 years. Carbon steel spray-painted material: Weak corrosion resistance, prone to paint peeling and rusting. The service life is usually 5-8 years. Life of key components (need to be replaced regularly) The core functional components of the embedded clean transfer window are consumables or wearables, and their lifespan is much shorter than that of the main structure. Regular replacement is necessary to ensure the cleanliness performance: High-efficiency filter: Core consumable of the clean room. Depending on the usage environment and pressure difference changes, the replacement cycle is 3-6 months to 1 year. Sealing strip: Used to ensure the sealing performance of the transfer window. Affected by environmental temperature and humidity and friction, the aging period is 1-2 years. Interlock device (mechanical/electronic): Mechanical interlock

To determine whether the service life of the clean transfer window has expired, it is not sufficient to only consider the duration of use. A comprehensive judgment should be made by taking into account the state of the main structure, the performance of core components, and the compliance of the clean function. The specific judgment criteria are as follows: Judgment of aging / damage of the main structure Material corrosion and deformation: Large areas of pitting on the stainless steel frame, weld cracks, or peeling of the paint on the carbon steel spray-painted shell, and penetration of rust through the sheet; cavities show depressions and deformations, which cannot ensure a sealed space, indicating that the structure has expired. Abnormal operation of doors and windows: Doors and windows are stuck, unable to fully close, or the gap between the door frame and the cavity exceeds 0.5mm, and even after replacing the sealing strips, the problem cannot be improved, requiring a complete replacement. Failure of core components Interlock device failure: Mechanical interlock cannot achieve the function of “one door opening, the other door locked”; electronic interlock frequently malfunctions, sensors have no response, and the fault recurs after multiple repairs. Performance attenuation of

The core differences between the ordinary high-efficiency supply air outlet and the DOP liquid tank high-efficiency supply air outlet lie in the sealing structure, leak detection method and applicable cleanliness level. The detailed differences between the two can be compared from the following five dimensions: Comparison dimension Ordinary high-efficiency air supply outlet DOP liquid tank high-efficiency supply air outlet Sealing method It adopts a compression-type seal. Through sponge and rubber sealing strips, the filter frame is compressed by the frame bolts to achieve sealing. This is a “dry seal”. The liquid tank seal is adopted. The frame is equipped with a dedicated liquid tank adhesive. The filter frame is inserted into the liquid tank adhesive to form a liquid seal, which belongs to “wet-type sealing”. Leak detection method The conventional dust particle counter is used for scanning and leak detection, to measure the particle leakage at the connection point between the filter and the frame. Specialized DOP/PAO dust leakage detection. By using an aerosol generator to release particles, the leakage rate at the sealed area can be detected, with higher accuracy. Sealing performance The sealing performance is moderate. Due to the aging of the sealing strips and uneven compression force,

There is no fixed standard for the replacement cycle of the liquid tank sealant of the high-efficiency air outlet. The core factors depend on the quality of the sealant, the usage environment, and the test results of the sealing performance. The industry’s general reference and judgment basis are as follows: Regular replacement cycle High-quality liquid tank sealant (such as polyurethane-based liquid tank sealant with aging resistance and anti-shrinkage properties) can be replaced once every 2-3 years in a stable environment of a 100-level or higher cleanroom; If using ordinary liquid tank sealant or if the cleanroom has large temperature fluctuations, corrosive gases, or high dust concentration, it is recommended to replace it once every 1-2 years. Criteria for immediate replacement Visual inspection: If the liquid tank sealant shows hardening, cracking, shrinking, flowing, or there are gaps at the bonding point with the frame; Leak detection test: When using DOP/PAO leak detection, if the leakage rate at the filter and liquid tank sealing area exceeds the standard, and the filter itself is not damaged, the liquid tank sealant needs to be replaced; Maintenance operation: When replacing the high-efficiency filter, it is recommended to check the condition of the liquid tank sealant