Clean plant construction quality control can be divided into three stages: namely, the preparation stage, construction stage and acceptance stage.
(a) the preparation stage quality control points
1. conscientiously do a good job of drawing review and technical briefing
Fully comprehend the design intent, do a good job of drawing review and technical briefing is to ensure the quality of the construction of clean plant construction is an important technical link, to find and solve the technical difficulties in the construction of difficult to operate, in order to ensure that the quality of the construction of clean plant to lay a solid foundation.
Construction will appear in a variety of contradictions, which requires the construction side and design, construction cooperation, in order to ensure the quality of clean plant construction under the premise of reasonable changes.
For example, in a clean plant renovation and expansion project inspection found that the original design of the air duct size in the main building floor height limitations of the ceiling floor can not be constructed, after the construction and designers and construction coordination, without affecting the quality of the project under the premise of the air duct size from the square into a flat, both to meet the requirements of the air volume, but also to ensure that the construction of the ceiling height requirements.
2. Strictly control the quality of materials and equipment
Clean plant materials and equipment are mainly various types of decorative materials and air-conditioning equipment materials. Decorative materials should be strictly in accordance with the relevant national engineering standards, construction quality acceptance norms and design documents for inspection and verification requirements. Clean plant should not be used to produce dust, dust, corrosion-resistant, moisture-proof mold and easy to clean and fire-resistant materials, can not use wood and gypsum board for surface decorative materials.
Air-conditioning insulation materials must also comply with the relevant provisions of the State to achieve corrosion-resistant, non-dust-producing, non-adhesion of dust and fire and other requirements.
(B) project quality control points
1. Select the construction team after professional training
Clean plant construction involves decoration, HVAC, electrical and medical gas and other specialties, the construction personnel must be on the construction of clean plant specifications, construction technology, construction quality of the construction of a comprehensive understanding of the team, or else it is difficult to protect the quality of construction.
2. Clean plant sealing control focus
Clean plant sealing control focus is the sealing of the enclosure structure of the construction quality, such as plate and plate should be uniformly coated with sealant, to achieve tight air leakage; clean plant embedded in the wall of instrument cabinets and walls, wall plates installed on the sockets, switches, smoke detectors, lighting cabinets and medical lighting, viewing lights, etc. need to be sealed with sealant, and instrumentation, and instrumentation, and the wall installed on the wall, switches, smoke detectors, and medical light, viewing lights. Sealant for sealing, and instrument cabinets in a variety of pipes and boxes must be used between reliable and effective sealing measures.
3. Return air duct quality control
The sealing of the return air system duct is to prevent unclean air from entering the duct, preventing the polluted air in the duct from penetrating out, so as to meet the cleanliness of the clean plant and extend the use of high-efficiency filter time. Construction should focus on controlling the quality of pipe processing, pipe construction and equipment installation.
Duct processing should focus on the cleanliness of the duct equipment and duct processing sealing measures. Duct processing should be made of high-quality galvanized steel to meet the requirements of flat, smooth, solid and erosion resistance; muffler filled with muffling materials should not produce dust, no slag (fiber), no moisture absorption, no pollution, shall not be used for loose materials, fiber materials should be felt-type materials, the outer cover can prevent the fiber from penetrating the wrapping material. Foam and centrifugal glass wool should not be used. Duct production before the use of neutral detergent to remove oil, the production process to prevent scratches, the end of production with a white silk cloth wipe the inner surface should not have any oil, ash for cleaning qualified. Duct section processing after cleaning qualified with plastic film to protect the ends of the duct and then transported to the site for installation, all duct accessories and equipment must be wiped clean before installation, otherwise it can not be installed.
Duct connection and equipment installation process should pay attention to good sealing measures to avoid secondary pollution, due to the hose, flexible joints have stagnant dust problems, so the purification of ducts and motorized equipment coupling can be used when the flexible joints, but in the pipe should not be used.
Secondly, the control of secondary microbial contamination is more meaningful than the secondary pollution, but also easier to be ignored. Secondary microbial pollution contained in the secondary dust pollution, mainly contained in the air conditioning treatment device. The bacteria and dust particles accumulated in the air-conditioning treatment unit during operation, and during the shutdown period, the high temperature and high humidity environment and the nutrition provided by the dust particles provide the most favorable conditions for the reproduction of microorganisms. Newly reproduced microorganisms and their release of harmful odor gases and a large number of harmful metabolites, corpses and debris - a large portion of which can not be blocked by the high-efficiency filter, thus constituting a microbial secondary pollution.
Facts tell us that flexible joints are also an important source of secondary microbial contamination. This is because flexible joints are usually not insulated, and this is where condensation occurs. For medical cleanrooms, even a small number of flexible joints must be double-layered or insulated flexible joints.
Finally, all joints of the combined air conditioning unit should be sealed, and a water seal is provided on the condensate drain pipe of the table cooler to ensure that the air conditioner is airtight and does not leak.
(C) acceptance stage quality control points
Purification of air conditioning system debugging is an important work of the acceptance stage of the project is indispensable. Through the debugging can be found in a timely manner in the construction of some of the defects and timely rectification and repair, debugging on the design drawings is also an important verification process.
Clean plant and air conditioning return air ducts should be installed before the installation of high-efficiency filters to meet the cleaning requirements, purification and air conditioning system must be continuously blown for more than 12 hours, and after the air blown back to the air ducts and air conditioning units for internal cleaning and scrubbing clean.
After the completion of the project, the construction unit should organize the medical department, the use of clean plant of the corresponding departments, design and construction units in accordance with the project design documents and "Hospital Clean Surgery Department Building Technical Specification" (GB50233-2002), "Ventilation and Air Conditioning Construction Acceptance Specification" (GB50243-2002) and "Construction and Acceptance Specification for Clean Plant" (JGJ71-90) and so on. JGJ71-90) and other relevant construction quality acceptance norms for clean plant for strict quality acceptance, and should be entrusted to a qualified third-party testing unit for clean plant cleanliness against the design documents and relevant standards and norms for testing.
Three, maintenance
Maintenance in the process of ensuring the quality of clean plant engineering also has a pivotal role. Some information shows that a hospital clean plant staff suddenly fainted, it was found on the one hand, the new air heater is not effectively filtered before the pipe has been seriously clogged, due to the lack of maintenance, so that there is no fresh air inhalation, coupled with a part of the air-conditioning box fan off the band, the total air volume is small, resulting in a clean plant is relatively airtight, the weaker people in the long-term lack of oxygen indoor fainting conditions will occur.
Re-example, a hospital clean operating room on a day suddenly found a point of bacterial concentration increased, only to stop the operation to be investigated. As a result, a visible hole was found in the filter above a certain point. Technicians believe that this loophole has existed before. The problem is that there is no system to check the leakage of the filter, and if the hole plate is often opened to check, it is not difficult to find this problem.