In the leading air conditioning cities of semiconductor electronics industry, medicine industry, precision instrument industry and biological laboratory, air filters and air conditioning units are usually combined to form purification air conditioning units. There are three types: cabinet purification air conditioning units, combination air conditioning units and purification fresh air units.
1. Cabinet Purification Air Conditioning Unit
(1) Structural Principle
Cabinet air conditioning unit is an air conditioning unit which can provide constant temperature and humidity and purify air. Its shape is like a large vertical cabinet, the unit has its own cooling source, including compressor, condenser, heat exchanger, heater, humidifier, centrifugal fan and automatic control device. A filter is arranged at the return air outlet and the outlet of the air conditioning unit, and a pressure difference switch is arranged before and after the filter.
(2) Classification
According to the cooling mode of condenser, it can be divided into water cooling and air cooling. According to the use, it can be divided into air cooler, air cooler and air heater, and constant temperature and humidity machine.
(3) Characteristics
On the basis of constant temperature and humidity, air can be purified to simplify the clean air conditioning system. The filter set at the return air outlet is a first-class filter (crude efficiency), usually flat-panel filter or bag filter; the filter set at the outlet is a second-class filter (high efficiency), usually using W-shaped dense folding filter or non-baffled overspeed.
(4) Application
The cabinet-type air-conditioning unit is suitable for the occasion with high requirements for air cleanliness. Usually, high-efficiency and sub-high-efficiency air filters should be installed at the end. It can be made into special air-conditioning units for computer rooms and operating rooms according to the needs, and equipped with air filters that meet the requirements.
2. Combined air conditioning units
(1) Structural Principle
The combined air conditioning unit is composed of different functional sections (air treatment section), and different functional sections can be selected according to the needs of the clean area. Generally, there are the following sections: mixing section of fresh return air (with regulating valve), coarse filter section, heating section, surface cooling section, humidifying section, secondary return air section, transition section, fan section and silencing section. Section, heat recovery section, medium and high efficiency filter section and outlet section.
(2) Classification
Combined air conditioning units can be divided into general industrial combined air conditioning units and medical combined air conditioning units. Medical air conditioning unit sets heat exchange coil in positive pressure section, eliminating the drawbacks of coil water not easy to drain away, eliminating bacteria, pollution and odor caused by water accumulation; Medical combined air conditioning unit uses hydrophilic film flat fins to prevent the formation of small droplets on the surface of aluminium foil, reduce water droplets in airflow, and flat fins are not easy to accumulate dust. Bacteriogenesis; Setting the medium and high efficiency air filter between the equalizer and coil after the fan to make the medium efficiency air filter meet the requirements of the positive pressure section of the unit, protect the evaporation coil and reduce dust and bacteria accumulation; adopting the method of blowing or special self-circulation disinfection to keep the germ-prone parts of the surface cooler sterile.
(3) Characteristics
The combined air conditioner does not have refrigeration compressor, and the refrigerant is supplied by the refrigeration system. Combined air conditioning units can be combined according to the needs of functional sections, flexible use.
(4) Application
When combined air-conditioning units are used in situations with high air cleanliness requirements, it is necessary to install high-efficiency and sub-high-efficiency air filters at the end of the air supply. Sterilization and disinfection measures must be taken for medical combined air-conditioning units.
3. Purifying fresh air unit
(1) Structural Principle
Purification fresh air unit is a kind of air conditioning unit which can provide constant temperature and humidity and filter fresh air in three stages. When the dust concentration of outdoor fresh air is high, if only the fresh air is filtered roughly, it will increase the filtration load of high efficiency air filter in clean system and affect the indoor air quality.
(2) Characteristics
The three-stage filtration of fresh air (crude, medium and sub-high efficiency) protects the high and medium efficiency air filter of clean system. The area of fresh air filter is small, the maintenance and management is convenient, and the increase cost is small.
As a professional project design, system engineering construction, supporting product sales purification engineering enterprise, Edward Purification has professional secondary qualification of purification engineering, strong strength, rich experience, strict to every detail of purification engineering, to ensure the quality of purification operation room, is a trustworthy purification manufacturer for customers.
To learn more about the medical purification industry, please pay attention to the Wechat Public No. Aide-188 (Ed Purification and Oxygen Supply)