JP2011117684A - Cooling tower - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in a cooling tower mainly used as an equipment item of a refrigerating cycle of an air conditioner, wherein as the air (outside air) and the circulation water are directly kept into contact with each other, in many cases, it is installed in limited spaces such as a house top and the outside of a house on a road side, performance of the air conditioner is degraded by contamination due to used water quality (chlorine) and the like, and further the cooling tower has a bad influence on hygiene as recently it seems to be a breeding ground of infecting bacteria such as Legionella bacteria, so that maintenance and inspection for removing the scale of the circulation water and obtaining antibacterial effect must be performed without fail, and maintenance costs over time is increased. <P>SOLUTION: Thin films composed of a substance having photocatalyst, are formed on body surfaces of a filling material, an intermediate filling material receiver, a louver and an eliminator as components kept into contact with the circulation water in the cooling tower, upper and lower water tanks, an inner face of water distribution box, machineries kept into contact with water or air, and the like, thus accumulation of the scale on the machineries in the cooling tower, and breeding of bacteria are suppressed, and further costs for maintenance and equipment items are reduced. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to equipment used for heat exchange of circulating water inside a cooling tower.

The accumulation of scales attached to the filler and the attached equipment that the circulating water in the cooling tower comes into contact with, and the breeding of bacteria and the like that occur will be controlled.

As measures to improve this, conventional water quality management of circulating water in cooling towers generally includes periodic water quality inspections, physical cleaning and washing using tools depending on the frequency of contamination, and chemicals. Process management is performed by chemical cleaning such as charging into circulating water using a device equipped with a tank, an example of which is shown in the prior art document and Patent Document 1.

JP 2007-22517

  The conventional filler part in the cooling tower is a heat exchanger in which air (outside air) and circulating water are forcibly brought into direct contact with a fan and cooled by evaporation of the circulating water, and evaporates the water. In order to exchange heat efficiently, the contact time of air and water is made longer, and fillers are used as a structure to increase the surface area in the form of drops of water. Since scales, bacteria, etc. are attached and propagated, Patent Document 1 proposes an example of maintenance management technology such as adding chemicals to circulating water. However, according to the above technology, tanks, injection pumps, and control units for introducing chemicals require installation space, equipment, etc., and after-sales maintenance of the equipment is indispensable. . Therefore, the present invention is an improvement for suppressing the accumulation and propagation of bacteria such as scales and Legionella spp. To the filler and circulating equipment that comes in contact with circulating water without the need for new equipment and installation space. It is an issue to provide.

  In order to solve the above-described problems, the present invention provides a filling material, an accessory device assembled in the filling material, an eliminator, a louver, an intermediate filling material receiving material, an inner surface of an upper water tank, a lower water tank, and a distribution box. It is a cooling tower characterized in that a titanium dioxide (Tio2) photocatalyst or a silver-based titanium oxide is coated in a thin film on the bottom surface and parts of equipment that come into contact with water and air.

  According to the present invention, the packing material inside the cooling tower and the accessories assembled in the packing material, the eliminator, the louver, the intermediate packing material receiving material, the upper water tank and the lower water tank, the inner surface of the water distribution box, titanium dioxide or silver Since the system-participating titanium is coated on the surface of the member, the organic matter contained in the circulating water adhering to the member is decomposed by the photocatalytic function, and the growth of scale and bacteria can be suppressed. The frequency of physical cleaning such as cleaning and chemical cleaning using chemicals is reduced, maintenance is simplified, and the installation space and cost of equipment and equipment for cleaning are reduced.

FIG. 1 is a perspective view showing an embodiment of the present invention. Figure 2 shows the internal structure of a square cooling tower

One embodiment of the present invention is shown in FIGS.
The cooling tower has a square shape and a round shape as shown in FIG. 1, and the principle internal structure of cooling is roughly similar. Therefore, the square shape is shown in FIG. The cooling tower has a mechanism that creates cooling water by forcing air (outside air) into contact with a blower fan while circulating water. In the component equipment, the water supplied from outside the cooling tower is stored in the lower water tank 9 with a certain amount of water, pumped up by the cooling water pump 10, sent to the upper water tank 4 through the water distribution box 3, and dripped into the filler 6. At the same time, the air (outside air) that falls into the water tank 9 contacts the circulating water while passing through the filler 6 from the louver 5 by the blower fan 2, cools the water, and moves to the outside of the cooling tower. The louver 5 functions as an air inlet guide panel, and the eliminator 8 functions to suppress water droplets from the filler. These equipments (other than 1 and 10) are coated with a thin film of titanium dioxide (Tio2) or silver-based titanium oxide as a photocatalyst. It has been demonstrated that when a photocatalyst-coated tissue comes into contact with a fluid such as air or water, purification such as decomposition of organic oxides of air or water and suppression of the growth of microorganisms or bacteria is performed.

According to this embodiment, the equipment and components constituting the cooling tower are the same as existing products, and the equipment shown above is coated with titanium dioxide (Tio2) or silver-based titanium oxide before assembly of the manufacturing process. However, there will be no additional changes in the quantity of equipment and components. Therefore, the surface of the equipment coated with photocatalyst that comes into contact with the circulating water has an excellent hydrophilicity and purification action due to the decomposing power of oxides and microorganisms, thereby eliminating equipment costs and maintenance for removing scales and removing bacteria. The maintenance cost is reduced, and the cooling efficiency of the cooling tower is improved.

1 Fan motor
2 fans
3 Water distribution box
4 Upper tank
5 louvers
6 Filler
7 Receiving intermediate filler
8 Eliminator
9 Lower tank
10 Cooling water pump

Claims (2)

  A thin film made of a material having a photocatalyst is formed on the surface of the filler in which the circulating water is dripped, the main body of the equipment that assembles the filler, and the upper, lower water tank, and distribution box inside the circulating water. cooling tower. The scope of claim 1 is equipment that contacts either water or air in the equipment inside the cooling tower, titanium dioxide (Tio2), which is a photocatalyst, is exposed to light, and silver-based oxidation is applied to areas that are not easily exposed to light. Cooling tower with titanium.