Constant temperature and humidity air conditioner, also known as precision air conditioning, has the functions of refrigeration, dehumidification, heating, humidification, etc., which can provide a kind of artificial climate and make the indoor temperature and relative humidity constant within a certain range. General precision air conditioning can keep the ambient temperature at 20 ~ 25 ℃, the maximum deviation of ± 1 ℃; relative humidity of 50% to 60%, the maximum deviation of 10%, is a more complete air conditioning equipment, its temperature and humidity control range according to the site's use of the requirements to determine.
Characteristics of constant temperature and humidity air conditioning: control range
Machine room air conditioning not only for the temperature can be adjusted, but also for the humidity can be adjusted, and the precision are very high. Computers, especially servers, have particularly high requirements for temperature and humidity, if the change is too large, the computer's calculations may be wrong, the service provider is very unfavorable, especially in the banking and communications industry. Now the machine room air conditioning requirements in the temperature accuracy of ± 2 ℃, humidity accuracy of ± 5%, high-precision machine room air conditioning can be temperature accuracy of ± 0.5 ℃, humidity accuracy of ± 2%?
Characteristics of constant temperature and humidity air conditioning: sensible heat ratio
Sensible heat ratio is the ratio of sensible cold volume to total cold volume. The total cooling capacity of the air conditioner is the sum of sensible and latent cooling, in which the sensible cooling is used to cool down the temperature, while the latent cooling is used to dehumidify. The heat of the machine room is mainly sensible heat, so the sensible heat of the machine room air conditioner is relatively high, generally above 0.9 (ordinary comfort air conditioner is only about 0.6).? Large air volume and small han difference is the essential difference between machine room air conditioner and other air conditioners. The use of large air volume, you can make the temperature of the outgoing air is not too low, and increase the number of air changes in the server room, which is favorable to the server and computer computing. Server room temperature changes in a short period of time will be too large to cause the server computing errors, server room humidity is too low will cause static electricity (humidity at 20% when the static electricity can reach 10,000 volts).
Constant temperature and humidity air conditioning features: energy efficiency ratio
Constant temperature and humidity air conditioning (COP) that is, the ratio of conversion between energy and heat, 1 unit of energy, converted to 3 units of heat, COP = 3. As most of the room air conditioning scroll compressor (the smallest power also 2.75KW), COP can reach a maximum of 5.6. The energy efficiency ratio of the whole machine reaches more than 3.0.
Constant temperature and humidity air conditioning features: reliability
The most important thing is the reliability of a machine room. To run trouble-free for 8760 hours a year, you need reliable parts and excellent control systems for server room air conditioners. General room is more N + 1 backup, an air conditioning problem, other air conditioning can immediately take over the entire system.
Constant temperature and humidity air conditioning and home air conditioning difference:
Constant temperature and humidity air conditioning and ordinary home air conditioning difference is very big, can not be replaced:
1, constant temperature and humidity air conditioning air volume, low enthalpy difference in the way of air supply to maintain a smaller temperature, humidity uniformity. And ordinary household air conditioning air supply aspects strive to be comfortable. General constant temperature and humidity air conditioning air volume for ordinary household air conditioning air volume of 2 to 3 times.
2, due to rapid changes in humidity, the unit needs frequent dehumidification, and constant temperature and humidity air conditioning using refrigeration dehumidification, so the air conditioning refrigeration system can be frequently started, the refrigeration system requirements are very high; while the household air conditioning compressor can not be frequently started, set up with a compressor three-minute shutdown protection.
3, constant temperature and humidity air conditioning with a powerful independent control board, must have temperature, humidity detection, airflow detection function, with the room more and more high requirements, the control board has been attempted to join the incoming call since the start, fault warning, historical data preservation, data output, network monitoring and other functions. And home air conditioning comes with very little functionality.
Because of the constant temperature and humidity air conditioning on the ambient air temperature, humidity, cleanliness, airflow can be effective high-energy control, so the constant temperature and humidity air conditioning is widely used in the computer room, program-controlled switching machine room, satellite mobile communication station, large medical equipment room, laboratory, test room, precision electronic instrument production workshop and other high-precision environment,
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