According to the theory of heat and humidity exchange, in the actual project we will be divided into the following two types of humidifiers:
1, isenthalpic humidifier: that is, the use of water to absorb the sensible heat of the air for the evaporation of the humidification, the enthalpy, wet map of the change in the approximate enthalpy of change for the process. Using isenthalpic humidification type humidifier: high pressure spray humidifier, evaporative wet film humidifier, water and air spray humidifier, centrifugal spray humidifier, ultrasonic humidifier and other basic forms, according to the principle of its also derived from a variety of forms of humidifiers, such as duct type wet film humidifier, high-pressure micro-mist humidifier, etc.
2, isothermal humidifiers: that is, the use of heat to convert the liquid water into steam and air Mixed with air humidification, its enthalpy, wet map on the change for the approximate isothermal process. Isothermal humidification form of humidifier: dry steam humidifier, electrode humidifier, electric humidifier, steam to steam humidifier, PTC steam humidifier and other basic forms.
According to the humidity requirements in the air-conditioning project, we will be humidified into process humidification and comfort humidification of two kinds:
1, in the modern industrial production and scientific experiments in the air humidity is increasingly important, the requirements are also more and more demanding, if the humidity can not meet the requirements, it will result in different degrees of adverse consequences, such as:
1) electronic factories, semiconductor factories, program-controlled machine rooms, and the humidifier will not be able to meet the requirements. Semiconductor factory, program-controlled machine room, explosion-proof factory and other places of humidity requirements are generally 40% - 60% RH, if the relative humidity is not enough will cause static electricity increases, so that the product yield decline, chip damage, and even in some explosion-proof places will cause an explosion, "static bombardment" brought about by the hazards is incalculable, when the air When the air humidity is lower than 40% RH is very easy to produce static electricity, although people have taken a lot of ways to get rid of static electricity, and the air humidity to 45% RH or more is absolutely effective.
2) textile factories, printing presses, film factories and other places of humidity requirements are generally very high, generally greater than 60% RH, such as textile plant humidity requirements are generally in the 50% - 85% RH between the yellow chemical section to prevent static electricity, spinning section to prevent crystallization of the Mannish are required to have a high degree of humidity, the humidity of the cotton fiber directly affects the strength of the fibers, in short, textile workshop air conditioning to ensure that the technology Need for relative humidity-based. In the printing and film production process, the humidity is not enough to cause color inaccuracy, paper shrinkage and deformation, paper adhesion, product quality decline and other issues.
3) precision machining lathe, a variety of measurement room humidity requirements are generally between 40% - 65% RH, such as precision bearing finishing, high-precision engraving machine, mechanics measurement room, electrical measurement room, etc., if the humidity is not enough to cause a decline in the accuracy of the processed products, measurement data distortion.
4) product coating plant humidity requirements are generally greater than 60% RH, if the humidity is not enough to make the paint on the metal or plastic adhesion decline, uneven spray paint, surface finish degradation and other issues.
5) pharmaceutical plants, operating rooms and other environmental requirements for humidity is a necessity, and clean humidification, if the humidity is not enough will cause a decline in the level of drugs, bacteria, wounds are not easy to heal and other issues.
6) In addition, in the cigarette, cold storage preservation, food moisture, aging experiments, cultural relics preservation, gravity test, protection and decoration, convalescent centers and other places, the humidity requirements are very high, with the development of modern industry, humidification in the air-conditioning project will be more and more important. Although in some southern regions of the humidification requirements for a very short period of time, some only 1-2 months, but as long as the process needs to ensure that the quality of the products produced remains unchanged, humidification issues must be considered.
2, according to the determination, people feel most comfortable in the environment temperature of about 25 ℃, relative humidity in the 45% - 55% RH of this interval, too low relative humidity will cause skin dry and cracked and itching and other phenomena, the right relative humidity will make people feel very comfortable, maintain human health, improve work efficiency. In addition, the appropriate temperature and humidity environment is also conducive to the protection of room decoration, extend the life of the home furnishings.
There are various ways of humidification, but it is not possible for each form of humidification to meet all the humidification needs, so it is important to reasonably select the appropriate humidifier according to the specific requirements of the actual project! Reasonable selection of humidifiers should be from the humidification effect, equipment costs, operating costs, maintenance costs, security and other aspects of the comprehensive consideration, so that both to meet the humidification needs and does not cause waste, in line with the basic concepts of modern production and life!
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