How to choose the air conditioner for the dust-free purification workshop? -common problem
How to choose the air conditioner for the dust-free purification pharmaceutical cleanroom?
(1) According to the relevant standards of our country, air-conditioning equipment is divided as follows:
Air-conditioning equipment with a refrigerating machine and a cooling capacity of more than 16.3kW is called an air-conditioning machine;
Air conditioners with refrigerators and cooling capacity below 16.3kW are called air conditioners;
Air conditioners without refrigerators are called air conditioners...
Text label: installation of dust-free purification workshop, installation of air conditioner in purification workshop
How to choose an air conditioner for a dust-free purification workshop?
(1) According to the relevant standards of our country, air-conditioning equipment is divided as follows:
Air-conditioning equipment with a refrigerating machine and a cooling capacity of more than 16.3kW is called an air-conditioning machine;
Air conditioners with refrigerators and cooling capacity below 16.3kW are called air conditioners;
Air conditioning equipment without a refrigerator is called an air conditioning unit.
(2) Types of air-conditioning equipment commonly used in purification air-conditioning systems
1) Cabinet air conditioner (device)
The cabinet type air conditioner looks like a large vertical cabinet, it has its own refrigeration compressor and direct evaporative surface cooler. According to the cooling method of the condenser, there are water cooling and air cooling, or integral and split;
When choosing a cabinet air conditioner, the following points should be considered:
a. The air volume is suitable in the range of several thousand to 20,000 to 30,000 cubic meters per hour, and the larger air volume can reach 50,000 to 60,000 cubic meters.
b. No need to build a chiller system and a chiller room.
c. If there are water restrictions or it is inconvenient to build a cooling tower, choose the split air-cooled type instead of the overall water-cooled type. There are two types of air-cooled types: one is that the compressor is indoors, and the outdoor unit is an air-cooled condenser; the other is that there are only heat exchange coils and fans indoors, and both the compressor and the air-cooled condenser are outdoors. The split type has the characteristics of quiet operation.
d. The general comfort air conditioner can choose the cold air type; if there is no other heating method, the hot and cold air type can be selected; if the constant temperature and humidity requirements are within ±2℃ and ±5%, the constant temperature and humidity type can be selected.
e. To choose a model with a certain residual pressure outside the machine, if the residual pressure is not enough, you need to add a relay fan.
Cabinet type air conditioner with high and medium efficiency filter is characterized by compact structure, double air intake fan, large air volume and small volume, with washable coarse filter, which is convenient for maintenance and management. Zhongjing Global Purification can provide consulting, planning, design, construction, installation and transformation of dust-free workshops and purification workshops and other supporting services.
2) Combined air conditioning unit (box)
Combined air-conditioning units are named after the combination of different functional sections - air handling sections. Designers and users can choose different functional segments according to their needs, generally there are the following segments:
a. The new return air mixing section is equipped with a split multi-leaf regulating valve;
b. Coarse-efficiency filter section, preliminarily filter the mixed air, the filter is a disposable type;
c. Heating section (heating by water, steam and electricity);
d. Surface cooling section;
e. Humidification section (spray, high electricity humidification, dry steam humidification);
f. Secondary return air section;
g. Transition section (overhaul section);
h. Fan section;
i. Muffler segment;
j. Heat recovery section;
k. Medium efficiency filter segment;
l. Outlet section.
Some of the above paragraphs are necessary, and some are optional. The unit casings are available in metal and glass fiber reinforced plastics. The combined air conditioner does not have a refrigeration compressor, and the refrigerant is supplied by the refrigeration system.
When choosing a combined air conditioner, you should pay attention to:
a. Suitable for large systems;
b. The area of u200bu200bthe computer room must be of sufficient length, and the length can reach more than ten meters;
c. There must be another refrigeration system to supply refrigerant.
In order to reduce the secondary pollution of microorganisms in the air-conditioning unit, the pollution of newly reproduced microorganisms and their odorous gases and a large number of special metabolites released to a lower level, the air-conditioning unit has taken the following major measures:
a. Contrary to the traditional air conditioner, the heat exchange coil is set in the positive pressure section, which fundamentally eliminates the problem of water accumulation and difficult drainage in the coil. Because it is in the positive pressure section, the water seal can be eliminated, and the problems of bacteria, pollution and odor caused by accumulated water are completely eliminated.
b. Contrary to the traditional method, the hydrophilic film flat fin is adopted, so that small water droplets will not be formed on the surface of the aluminum foil during the cooling and dehumidification process, which effectively reduces the water droplets in the airflow, so it is not easy to produce water-carrying phenomenon. Flat fins are also not easy to accumulate dust and bacteria, and are easily carried away by running water.
c. Use an air seal to prevent the backflow of polluted air during shutdown.
d. The medium-efficiency filter is placed between the equalizing plate and the coil behind the fan, so that the medium-efficiency filter can not only meet the requirements of being in the positive pressure section of the unit, but also protect the evaporating coil and reduce the Dust accumulation and bacteria accumulation can also completely prevent the medium-efficiency filter from being damp and easy to grow mold.
e. Use air blowing or special self-circulation disinfection methods to keep dry and sterilized parts that are easy to carry bacteria such as surface coolers.
(3) Special air conditioner (device)
Special air conditioner (device) is also a cabinet type air conditioner, which is specially designed for some occasions such as single-room laboratories, sterile rooms, etc. control function.
(4) Surface cooler with chiller
When there is no air conditioner with suitable specifications to choose from, you can design a surface cooler device with a fan, and the chilled water is supplied by the chiller.
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