JPH0512637Y2 - - Google Patents

Description

[Detailed description of the invention] A. Purpose of the invention <Field of industrial application> This invention relates to a cross-flow cooling tower, particularly its upper water tank.

<Prior art> In this type of cooling tower, there is no difference in its heat exchange capacity depending on winter, summer, sunny weather, or rainy weather, and the cooling tower cools too much in winter compared to summer. By installing a cooling tower and using part of it during the winter, the overall cooling capacity was changed. Alternatively, as seen in Japanese Unexamined Patent Application Publication No. 142399/1982, the range in which the filler is sprayed within a single cooling tower is varied.

In addition, in order to change the amount of water sprinkled from the upper tank,
It is conceivable that the water depth of the upper water tank can be varied greatly, that is, it is sufficient that the flow rate of cooling water sprayed onto the filler per unit time is smaller than that in summer.

<Problem that the invention aims to solve> How can a single cooling tower meet the required flow rate in winter?
100, three times the spray flow rate is required in summer than in winter, and if the upper water tank is designed to match this maximum flow rate, the total height will be higher, and in winter, the height used will be It is about one-ninth from the bottom, which is uneconomical, and the upper water tank tends to become larger, and due to the increase in weight due to the increase in water depth, the support must be placed at the top, and the entire cooling tower becomes larger. In addition, if the amount of water sprinkled is designed to match the large amount of water sprinkled in summer, it will be difficult to adjust the amount of water sprinkled in small amounts, increasing the cost of the water supply control device, or it will be impossible to adjust the amount of water, so controlling the number of units as in the conventional example is common. It is true.

In addition, as seen in the above-mentioned Japanese Patent Application Laid-open No. 142399/1983, a method that changes the spray area of cooling water sprayed onto the filler is not effective because when the spray area is reduced, the filler is not used effectively. Since the part that is not covered also becomes a ventilation passage, the ventilation efficiency also decreases.

Therefore, this idea was developed in one upper water tank.
The purpose of the present invention is to provide the market with a cross-flow type cooling tower that can easily adjust the amount of water whether the amount of water is large or small.

B. Structure of the invention <Means for solving the problem> In order to achieve the above object, this invention provides a cross-flow type cooling tower having an upper water sprinkling tank, in which a large number of water sprinkling holes are provided at a predetermined pitch at the bottom of the upper water sprinkling tank. are distributed and drilled, and at the inner edge of an arbitrary number of watering holes among these watering holes, there is a short pipe part standing up in the upper watering layer, and these short pipe parts are:
The cross-flow type cooling tower is characterized in that the cooling tower is distributed evenly at the bottom.

<Function> When using the cross-flow type cooling tower with the top sprinkler tank loaded in the present invention configured as described above in winter or in rainy weather, the cooling capacity per unit time for the water to be cooled may be low, so it can be used in a short period of time. The water level of the cooled water in the upper water tank is adjusted to a level that does not reach the top of the pipe section, and the water to be cooled is sprinkled onto the filler only from the water sprinkling holes, which do not have short pipe sections, so that the water is sprayed with a small flow rate. Cool by spraying cooling water.

Next, when using it in summer or on sunny days,
It is necessary to increase the cooling capacity per unit time for the water to be cooled, and for this purpose, the water level of the water to be cooled in the upper water spray tank is set to exceed the upper end of the short pipe section,
The water to be cooled is sprayed onto the filling material from the water sprinkling holes without short pipe portions and from the water sprinkling holes with short pipes, that is, from all the water sprinkling holes. In this way, the number of water sprinkling holes that are actually effectively utilized is doubled, and even if the water depth of the upper water sprinkling tank is slightly increased, the water to be cooled can be sprayed and cooled at a flow rate that is about three times that when the short pipe section is not used.

<Example> Next, a typical embodiment of the present invention will be described.

In FIGS. 1 and 2, A is a cross-flow type cooling tower, and a filling material (for example, a corrugated filling plate, A closed type heat exchanger) 40 is filled, and water to be cooled that has been circulated through a plant such as a refrigerator and heated up is supplied to the upper water spraying 20 through a supply pipe 50, and is sprayed onto the filling material 40. When the air comes into contact with the outside air that is horizontally taken in from the outside air intake port 11 of the main body 10, heat is removed by latent heat action, and then the air is collected in the lower drop water tank 3030 and circulated again by the pump to the refrigerator, etc. The structure of this cooling tower A is the same as that of the known one.

Several rows of a large number of watering holes 21 are provided at the bottom of the upper watering tank 20 at a predetermined pitch, and every other watering hole 21 is arranged in a staggered manner. There is a short tube section 22 standing upright inside. The number of all the short pipe parts 22 corresponds to one half of the total number of watering holes 21, and they are distributed on average at the bottom of the upper watering tank 20, and all the short pipe parts 22 are all at the same height. It's sato.

That is, the water sprinkling hole 21 without the short pipe part 22 and the water sprinkling hole 21 with the short pipe part 22 are provided at the bottom of the upper water sprinkling tank 20.
are arranged in an alternating average distribution. As an example, when the total height of the upper water tank 20 is 150 mm,
The height of the short tube portion 22 is approximately 50 mm.

The installation of this short pipe part 22 to the upper water tank 20 is as follows:
The molded part of the upper water tank 20 and each separate short pipe are connected to the water sprinkling hole 2.
Even if the upper water tank 20 is detachably attached to the bottom of the upper water tank 20 by screwing or fitting into the upper water tank 1, if the upper water tank 20 is an injection molded or press molded product of synthetic resin, the short pipe part 22 can be integrated with the upper water spray layer 20. Even if it is molded, it falls within the technical scope of this invention.

<Operation of the embodiment> When the cross-flow type cooling tower A loaded with 20 upper water tanks in the embodiment configured as described above is used in winter or in rainy weather, the cooling capacity per unit time for the water to be cooled is low. Therefore, the water level in the upper water tank 20 does not reach the upper end of the short pipe part 22.
The water level of the water to be cooled is adjusted inside the tank, and the water to be cooled is sprinkled onto the filler 40 only from the water sprinkling hole 21 without the short pipe portion 22, so that the water to be cooled can be sprayed and cooled with a small flow rate.
It is possible to perform heat exchange commensurate with rainy weather in winter, and the water to be cooled does not have to be cooled more than necessary per unit time.

Next, when using it in summer or on sunny days,
It is necessary to increase the cooling capacity per unit time for the water to be cooled, and for this reason, the water level of the water to be cooled in the upper water spray layer 20 is set to exceed the upper end of the short pipe section 22, and the water to be cooled is set to a level that exceeds the upper end of the short pipe section 22. Watering hole 21
If the water is sprayed onto the filler 40 from the water sprinkling hole 21 with a short pipe, the number of discharge ports will be doubled, so even if the water depth in the upper water tank is slightly increased, the flow rate will be about three times that when the short pipe part 22 is not used. By spraying and cooling the water to be cooled, it is possible to perform heat exchange commensurate with summer and sunny weather.

The short tube part 22 of the above embodiment has two types, long and short.
2a and 22b, and these short pipe portions 22 may be successively adjacent to each other and distributed on the bottom of the upper water sprinkling tank 20. (Refer to Figure 4) C. Effects of the invention As mentioned above, the present invention uses the average distribution of the short pipes to accommodate the height of the short pipes without increasing the height of the single upper water tank. The spraying flow rate from this upper watering tank to the filler material can be greatly changed in at least two stages, with the water level as the boundary.
During low-flow watering, the watering hole with the short pipe part does not participate in watering, and water is sprinkled from the watering hole without the short pipe part, so the amount of cooled water supplied to the upper watering tank is controlled. By only slightly changing the water level, the flow rate of cooled water can be easily adjusted and controlled when a small amount of water is sprinkled.
There is no need for control means to switch or change the number of cooling towers used depending on the summer season, and there is no need to increase the size of a single cooling tower. It can be adjusted and controlled according to summer, sunny or rainy weather, and can always provide an appropriate cooling effect.

Furthermore, regardless of whether a small amount or a large amount is sprayed, since the filler is always spread over the entire area of the filler, sufficient cooling capacity can always be exhibited. Furthermore, as is clear from the figure, when a small amount is sprayed, the short pipe section exerts a mud-retaining effect.

In order to help understand the explanation of the above-mentioned effect, changes in the discharge amount of the upper water sprinkling tank of the conventional example and the present invention are shown in Fig. 5a,
Indicated by b and c. Of these, a refers to the conventional upper water tank which has no short pipe part and the same number of water sprinkling holes as the water sprinkling holes of the present invention without a short pipe part, and b relates to the second water sprinkling tank.
Regarding the embodiment shown in Figs. 3 and 3, c has two types of short pipe parts 22a and 22b, long and short, and these short pipe parts 22 are successively arranged adjacent to each other in an average distribution to increase the spraying flow rate in three large steps. This relates to another embodiment shown in FIG. 4 which is changed to .

Note that if the diameter of the water sprinkling hole with the short pipe portion is made larger than the diameter of the water sprinkling hole without the short pipe portion, the amount of sprayed water to be cooled can be changed stepwise to a larger amount.

Effects Unique to the Embodiment When the short pipe section 22 is a removable short pipe, the height or inner diameter of the upper water tank 20 can be selected as desired as is obvious from the figure.
Even if the cooling tower capacity is the same, the cooling tower capacity can be optimally adjusted or changed for the purpose.

[Brief explanation of drawings]

The figures relate to this invention; Fig. 1 is a schematic longitudinal sectional view of a cooling tower of a typical embodiment of the invention;
Fig. 2 is an enlarged vertical cross-sectional view showing a part of the upper water tank in Fig. 1, Fig. 3 is a partial plan view of Fig. 2, and Fig. 4 is an enlarged longitudinal cross-sectional view similar to Fig. 2 of another embodiment. Figures 5a, b, and c are graphs showing changes in the water level discharge amount of the upper water spray tank, where a is the conventional example, b is the embodiment shown in Figure 2, and c is the embodiment shown in Figure 4. This corresponds to Main symbols in the diagram, 20... Upper water tank, 21...
...Water hole, 22...Short pipe section.

Claims (1)

[Scope of Claim for Utility Model Registration] In a cross-flow cooling tower having one upper water sprinkling tank, the bottom of the upper water sprinkling tank is provided with a large number of water sprinkling holes distributed at a predetermined pitch. , a cross-flow cooling tower characterized in that the inner edges of arbitrary water sprinkling holes are provided with short pipe portions standing up in the upper water sprinkling tank, and these short pipe portions are distributed evenly in the bottom portion. . 2. The cross-flow cooling tower according to claim 1, wherein the heights of these short pipe portions are the same at every other water sprinkling hole. 3. The cross-flow type cooling tower according to claim 1, wherein these short pipe sections are arranged in two types, long and short, successively adjacent to each other and distributed on average. 4 The height of these short pipes is the total height of the upper water tank.
150 mm, the cross-flow type cooling tower according to claim 2, which is about 50 mm. 5. The cross-flow cooling tower according to claim 1, wherein the short pipe portion is integrally formed with the upper water sprinkling tank. 6. The cross-flow type cooling tower according to claim 1, wherein the short pipe portion is formed to be detachably attached to the upper water sprinkling tank.