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For the long-term, continuous and effective control of the controlled environment, the entire system must also be controlled, that is, in addition to the indoor control, the area and the air-conditioning system must also be controlled. As long as there is a hidden danger of microbial contamination in the system, even if it can guarantee 10,000 passes, it cannot eliminate the contamination in case it occurs. Therefore, only by eliminating the hidden danger of microbial contamination in the system, or any possible risks, can we ensure the complete elimination of microbial contamination.
个部分组成的关系链：存在微生物的积累；引发微生物的繁殖；使微生物从积存地散播给易感人群的传播途径。 Microbial pollution occurs in air-conditioning systems. Generally, there are three parts of the relationship chain: the accumulation of microorganisms; the initiation of microorganisms; the transmission of microorganisms from the accumulation place to susceptible people.
To implement long-term, continuous and effective control of the controlled environment, the following countermeasures should be adopted: prevent microorganisms from entering the air-conditioning ventilation system; in case of entry, do not allow microorganisms to multiply in the system; in case of reproduction, cut off the path through which the microorganisms spread through the system. Preventing microorganisms from entering the unit or system is an important principle of biological purification and a starting point for overall process control. The air filter is the most effective measure to prevent microorganisms from entering the system. There are usually two entrances to the system, the fresh air outlet and the return air outlet. We usually pay attention to the quality of the fresh air and the coarse-effect filter of the fresh air outlet, but as mentioned earlier, there are almost no pathogens in the fresh air. Therefore, we should pay more attention to the role of the filter of the return air outlet.
The national standard "Specifications for the Design of Architectural Design of General Hospitals" stipulates that low-resistance and medium-efficiency air filters should be installed at the return air outlets of hospital air-conditioning systems to prevent pathogenic bacteria from entering the system. Prevent microorganisms from multiplying in the system, not by killing microorganisms by disinfection, but by eliminating dust and water accumulation in the system, and not using susceptible moldy materials, to eliminate the conditions for microorganisms to survive. In addition, comprehensive measures should be adopted for areas and systems to cut off the system's transmission channels. For example, air filters are installed in the system, each functional area is independently partitioned, and an independent system is adopted, and each air-conditioning area can be closed to avoid air routes during shutdown cross-infection.
In rooms with cleanliness requirements and heavily polluted rooms, measures should be taken to make it a separate system. It can be seen that biological cleansing technology has implemented a long-term, continuous and effective control of the controlled environment. Indoor microbial environmental control should pay attention to reducing microbial pollution load. We should clearly realize that HVAC is an energy-consuming environmental control method and has limited control capabilities.
HVAC does have a beneficial effect on indoor environment control, but it also has many negative effects. Reducing the load and capacity of HVAC systems has always been our important task. This can not only reduce investment and operating costs, but also an important idea for creating a good indoor environment. Do not exaggerate the role of HVAC, do some work that HVAC can not do well, especially for biological purification. For example, for thermal environment control, building measures such as improving the envelope structure and reducing solar radiation are often focused on to reduce thermal load. If it is an all-glass building, this part of the load will be added to the HVAC. Even if the required temperature and humidity control parameters can be achieved, it is difficult to ensure the comfort and health of the indoor personnel. Another example is industrial ventilation, which has always focused on measures such as improving processes, isolating or controlling pollution sources to reduce the pollution load and eliminate pollution in a shorter time and closer distance, instead of waiting for pollution to spread and then using a larger air volume to fully ventilate This will not only make the effect worse, but also cause excessive indoor wind speed, excessive noise and energy consumption. Therefore, for indoor microbial environmental control, more attention should be paid to reducing the load of biological pollution and eliminating or reducing the possibility of transmission. This is very important to effectively reduce the requirements and scope of air conditioning to control the spread of air.
Related links: Dongguan air-conditioning purification project, Dongguan dust-free purification equipment, Changan central air-conditioning project, low-voltage power distribution project, Dongguan purification ventilation project, Dongguan dust-free purification project, hydropower installation project, Dongguan 100,000-level dust-free workshop, Dongguan City Power Xiang Air Conditioning Purification Engineering Co., Ltd.