Usually, the dry wet bulb signal transmitter and the relative humidity proportional integral regulator are used together to form the air humidity controller for the air conditioner of the machine room. The humidity of the dry and wet bulb in the engine room is measured by using a nickel resistor or a platinum resistor and a special small fan.
The safe use and maintenance of the humidity controller of the air conditioning and wet bulb in the air conditioning room have the following points:
(1) water bottles should be often added to the water bottle used by the wet bulb thermometer.
(2) the gauze on the wet ball is a skimmed gauze. When the gauze is yellow and hard, it should be replaced.
(3) the air flow rate should be at 2.5~4m/s to ensure the heat exchange.
(4) to keep away from the heat source and to prevent the influence of radiation on it.
(5) psychrometer at a low temperature, the relative error increases, because the temperature is reduced, psychrometric difference was significantly reduced, in order to prevent the wet bulb gauze set ice, can add formaldehyde in distilled water (formalin) aqueous solution, so it can be used in more than -35.
2. room air conditioning hair, nylon film humidity regulator
The use of hair (or nylon sheet) in the displacement variation of the relative humidity of the air is formed, to move the pneumatic nozzle baffle component of the regulator, and the signal is converted to the pressure signal of a given value, after amplification to drive pneumatic actuator, formed the pneumatic hair hair (or nylon film) humidity control for, as with a sliding resistance, remove the voltage signal by amplifying the driving electric actuator, electric hair becomes a type (or nylon membrane) humidity regulator.
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