The invention relates to a simple point
refrigeration device, which is suitable for use outside semi-rooms such as
station platforms on the ground, outdoors such as supermarket rooftops and entertainment facilities waiting areas, and in large spaces such as factories where
air conditioning cannot be carried out in the entire venue. An outdoor air intake port (7a) is formed on one side, and a blowout port (7b) is formed on the other side. In order to inject water from a vertical or horizontal cylindrical passage (5) with both ends open, A dry
bulb hygrometer or a
relative humidity meter (11) is arranged on the side wall of the outdoor air inlet (7a) within a predetermined interval S with a sufficient distance to evaporate the spray water ejected from the
nozzle, and in the cylindrical passage (5 ) is equipped with a wet
bulb thermometer (12) and a
water spray nozzle assembly (8), and a fan (10) is installed in the cylindrical passage (7) other than the section (S). The spray water from the
water spray nozzle assembly (8) is sprayed in a direction opposite to the air blowing direction of the fan (10), and the
cold air that adjusts the temperature and
humidity of the outdoor air is blown out from the blower outlet (7b), and the point is
Refrigeration. Calculate the actual
temperature difference between the measured values of the dry-
bulb thermometer or
relative humidity meter (11) and the wet-bulb
thermometer (12). If the difference is greater than a certain value, determine the
humidity of the outdoor air before spraying to a certain value. When it is below the standard, the sprayed water droplets can be fully vaporized, thereby controlling the amount of
water spray.