JPH0318862Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention is a closed type cooling tower, in particular, a closed type cooling tower that cools the fluid to be cooled flowing inside the cooling coil by evaporative heat exchange between air flowing through forced draft and water sprayed from the top of the cooling coil. It concerns cooling towers.

Conventionally, as a filling method for cooling coils in a closed cooling tower, as shown in a perspective view in FIG. A suitable number of cooling coils 41 are arranged perpendicular to the surface, and the cooling coils 41 are connected to the header 4.
3 and 43', and as shown in the perspective view in FIG. A method is known in which a plurality of cooling coils 51 are arranged in parallel on the headers 52, 52' so that the cooling coils 51 meander in a plane in which the ventilation inlet side is slightly inclined downward. However, according to the former method, a large number of cooling coils are lined up in the direction of ventilation, and the gaps between them are narrow, so ventilation is obstructed, wind pressure is lost, and heat exchange efficiency is inevitably reduced. In addition, according to the latter method, a considerable angle of inclination is required in order for the inclination for draining water inside the cooling coil to be effective, resulting in the disadvantage that ventilation is significantly obstructed, and if the inclination angle is insufficient, Otherwise, the remaining water in the cooling coil may freeze in the winter due to insufficient water removal, resulting in problems such as the cooling coil bursting.

The present invention was developed in view of the above-mentioned drawbacks.It is used in a closed cooling tower that cools the fluid flowing through the cooling coil through forced draft and evaporative heat exchange with sprayed water. In addition to providing a predetermined gap between each filling material, each unit plate constituting the filling material is arranged vertically parallel to the ventilation direction, while the cooling coil is arranged in a plane perpendicular to the ventilation direction. Inside, the upper layer of filler is suspended on one side, and the next layer of filler is arranged in a meandering manner through the gap between the upper and next layer of filler on the other side, allowing air to flow smoothly. Wind pressure loss is extremely low, and ventilation is not obstructed even by increasing the number of cooling coils installed in parallel, so heat exchange efficiency is good, and there is a sufficient slope for water drainage. The purpose of this project is to provide a sealed cooling tower that can be used as a closed cooling tower.

The present invention will be described in detail below based on an embodiment shown in the drawings.

FIG. 1 is a front view of a closed cooling tower with the louver removed from the ventilation inlet. An inlet header 2 and an outlet header 3 are disposed on the left and right sides of the closed cooling tower 1 near the floor surface so as to extend in the ventilation direction (from the front surface to the back surface in FIG. 1), and A sub-header 4 for turning back water is arranged above the central part so as to extend in the ventilation direction. The filling materials 6 are arranged in multiple stages in the vertical direction within the cooling tower 1, and predetermined gaps 6a are provided between each filling material 6.
Each unit plate 6b constituting the filler 6 is formed by vacuum forming or press forming a plastic sheet to form an uneven wave pattern on the surface, and the plurality of unit plates 6b are arranged approximately parallel to the ventilation direction. They are installed vertically at regular intervals. Also, inside the cooling tower 1, there are cooling coils 5, 5' connecting the inlet header 2 and the sub-header 4, and the sub-header 4 and the outlet header 3.
A large number of cooling coils 5, 5' are arranged in parallel in the ventilation direction alternately, and this set of cooling coils 5, 5' is arranged in parallel in the ventilation direction so as to sequentially surround appropriate stages of packing material 6 filled in the cooling tower 1 from the upper stage. They are arranged in a meandering manner in orthogonal planes. That is, the cooling coils 5, 5'
extend in a straight line from the sub-header 4 to the left and right, respectively, with the left and right sides slightly inclined downward to the first upper bent parts 5a, 5'a, and then to the upper bent parts 5a, 5'a. bend downward at
They are arranged along both side surfaces 6c, 6c of the uppermost filler 6, and furthermore, at the lower bent portions 5b, 5'b, the next upper bent portions 5c, 5'c on the right and left, respectively.
The cooling coils 5, 5' intersect at the center of the linear portion, and are disposed in a symmetrical meandering manner so as to sequentially surround the lower filling material, and are connected to the inlet header 2 and the outlet header 3, respectively. .

Incidentally, the reason why the straight portions are inclined is to ensure that water can be drained from the cooling coils 5, 5' more effectively.

Further, 8 is a fan, and 9 is an upper water tank.

In this embodiment, the cooling coils 5 and 5' each move from the inlet header 2 to the outlet header 3 in one round trip up and down.
Although it is not limited to this, it is further connected to the
The reciprocating flow path and the set of flow paths may be made longer.

Next, to explain the function of cooling the fluid to be cooled using the cooling tower according to the present invention, in FIG. It flows down towards 3. During this time, as in the conventional closed cooling tower, water is uniformly sprayed from the upper water tank 9 onto the cooling coils 5, 5' and the packing material 6 below, and forced ventilation is provided by the fan 8.
Wind flows in from the ventilation inlet, and the fluid to be cooled is cooled by evaporative heat exchange between the sprayed water and the wind.

That is, the sprayed water is evaporated and cooled while flowing down the surface of each unit plate 6b of the filling material 6, and this sprayed water flows through the cooling coils 5, 5' disposed below the filling material 6. The fluid to be cooled flowing within the cooling coils 5, 5' is cooled while flowing down the surface.

Furthermore, FIGS. 2 and 3 show examples of the cooling coil of the present invention, and as shown in the figures, two straight pipes made of copper or the like are used.
1 are connected by rubber U-shaped tubes 22 to form a meandering cooling coil 20, and each of the U-shaped tubes 2
Pipes 23 and 24 are disposed outside the upper bent portion 22a and the lower bent portion 22b of the cooling coil 20 in a direction perpendicular to the meandering surface of the cooling coil 20. The lower bent portion 22b of the U-shaped tube 22 is supported by the pipe 24, while the upper bent portion 22a is supported by the hook member 2.
5, and using the hooking member 25, the pipe 23
The cooling coil 20 is supported by being hooked to. At this time, the hooking member 25 is a rectangular piece that is curved so that the side end surface is J-shaped, and a hole with approximately the same diameter as the outer diameter of the U-shaped tube 22 is provided in the plane part.
6, the end of the U-shaped tube 22 is inserted through the hole 26, and the curved portion is hooked to the pipe 23.

In this embodiment, the U-shaped tube 22 is made of rubber as a joint for an elastic body, but other materials can be used as long as it is an elastic body, and its shape is not limited to the U-shape but can also be L-shape. , I-shape, etc. can be adopted as appropriate. If a hard material is used, it is not necessarily necessary to support the downwardly bent portion 22b by bringing it into contact with the pipe 24 as in this embodiment, and it is possible to support it only by the latching member 25.

With this configuration, a cooling coil support method that does not use a conventional elastic joint can be used, for example, by drilling a large number of holes in a pair of support plates and inserting both left and right bent portions of a meandering cooling coil into the holes. Unlike methods such as inserting the coil for support or placing support pipes inside the left and right bent portions for support, installation is easy, and the cooling coil can be easily taken out or moved by removing the latching member. It is convenient for replacement and repair, and it is also economical, especially since it is possible to partially replace the cooling coil. Further, since the joint is made of an elastic body, it can sufficiently cope with the expansion and contraction of the cooling coil due to temperature changes, which is useful for preventing damage to the cooling coil.

Since the present invention has the above configuration, even if a large number of cooling coils are arranged side by side with close gaps, only the side surface of the cooling coil on the ventilation inlet side will block the ventilation, regardless of the number of cooling coils, and the same floor surface will block the ventilation. In addition to being able to cool a large amount of fluid to be cooled by effectively utilizing wind pressure, it is possible to provide a cooling tower with extremely high heat exchange efficiency due to the action of the filler placed in the gaps of the cooling coil. In addition, even if a slope is provided to drain water inside the cooling coil, the wind pressure will not be impaired, so it is possible to provide a sufficient slope to prevent the cooling coil from bursting due to freezing of residual water inside the cooling coil. It has various effects such as being able to prevent

[Brief explanation of the drawing]

Fig. 1 shows an embodiment of the present invention, a front view with the louver removed, Figs. 2 and 3 show a front view and a perspective view of an embodiment of the cooling coil, and Figs. 4 and 5. The figure is a perspective view showing a conventional example. 1 is a closed type cooling tower, 2 is an inlet header, 3 is an outlet header, 4 is a subheader, 5 and 5' are cooling coils, 6 is a filler, 6a is a gap, 6b is a unit plate, and 6c is a side surface.

Claims (1)

[Scope of Claim for Utility Model Registration] 1. In a closed cooling tower that cools the fluid to be cooled flowing through the cooling coil by forced draft and evaporative heat exchange with sprayed water, the cooling tower is provided with filler material in multiple stages in the vertical direction. In addition to providing a predetermined gap between each filler, each unit plate constituting the filler is
The cooling coil is installed vertically parallel to the ventilation direction, while the cooling coil is suspended from one side of the upper filling material in a plane perpendicular to the ventilation direction, and the cooling coil is suspended from one side of the upper filling material to pass through the gap between the upper filling material and the next filling material. A closed cooling tower characterized by a meandering arrangement on the other side. 2. The closed type cooling tower according to claim 1, wherein the cooling coil is connected to one side of each filler via an elastic joint.