JPH0861884A - Sealed cooling tower - Google Patents

Abstract

PURPOSE: To generate a water film on the entire surface of plate fins and to improve the cooling efficiency by providing a porous member for passing water in contact with the upper end of the fins of a heat exchanger, providing a sprinkling tank above it, and sprinkling the water in the tank at the fins through the member. CONSTITUTION: A porous member 40 for passing water is provided in contact with plate fins 31 of a heat exchanger 30 between a sprinkling tank 15 and the upper end of a heat exchanger 30. The tank 15 is provided at its bottom of a high position with a sprinkling port 36. The water overflowed from the port 36 is continuously fed to the upper surface of the member 40 and dropped to the fins 31 of the exchanger 30 through the member 40. The member 40 is formed of laminated glass wool 41 and sandwiched between the upper ends of the fins 31 and the lower surface of the tank 15. The water droplets adhered to the fins 31 via the wool 41 are evaporated by the air supplied by a fan 14, and exhausted from an exhaust port 12. Thus, the fins 31 are thoroughly sprinkled to improve the cooling efficiency.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooling tower in which a heat exchanger with plate fins is provided in a cooling tower, and more particularly to a closed cooling tower which effectively sprays water on the heat exchanger with plate fins.

[0002]

2. Description of the Related Art Conventionally, the actual exploitation shovel 53-1044 shown in FIG.
There is a closed cooling tower disclosed in No. 62. This one is
The heat exchanger 2 with plate fins is arranged in a V-shape in the cooling tower 1, and the heat exchanger 2 with plate fins is a closed cooling tower in which the water of the water spray device 3 is sprayed directly from above.

[0003]

In the conventional cooling tower described above, water is sprayed directly from above a heat exchanger in which a large number of plate fins are arranged vertically. However, it is difficult to sprinkle water evenly over the entire upper surface of a large number of plate fins, and in a general water sprinkler system in which water drops from the water spout holes on the bottom of the sprinkler tank, a large amount of water is sprinkled on the lower multi-layer plate fins. There are areas that are sprayed and small, or areas that are sprayed a lot and areas that are not sprayed at all.If there is a large amount of water, water will accumulate between the fins and it will be difficult for air to flow and cooling will not be possible. There was a problem that the cooling efficiency was different due to the waste of water and the position in the heat exchanger due to air cooling.

Further, the water sprinkled from the sprinkler drops and passes through the plate fins and the intermediate portion of the plate fins, and the sprinkled water does not contribute to cooling, resulting in wasteful water sprinkling. For this reason, even if water is sprinkled on the heat exchanger, the cooling effect due to water sprinkling does not appear as expected,
There was a problem with poor cooling efficiency. The present invention solves the above problems and, with respect to the heat exchanger with plate fins provided in the cooling tower, water is evenly sprinkled on each plate fin, and a water film by sprinkling is formed on the entire surface of the fins. An object of the present invention is to provide a closed cooling tower that is generated to improve cooling efficiency.

[0005]

SUMMARY OF THE INVENTION The gist of the present invention is to provide a heat exchanger with plate fins in a cooling tower, and a coolant such as cooling water which flows in the heat exchanger and is sprayed to flow in the heat exchanger by latent heat of vaporization. In the cooling tower for cooling, a porous member through which water is passed is provided in contact with the upper end of the plate fin of the heat exchanger, a sprinkler tank is provided on the porous member, and the water in the sprinkler tank is passed through the porous member to plate the water. It is a closed cooling tower characterized by spraying water on the fins. In the above, the porous member is
It may be a laminate of glass wool, a sponge or cloth formed by foaming a resin, or a sheet-like paper provided with pores, a resin, or the like. Further, a groove may be provided in the porous member so that the upper ends of the plate fins of the heat exchanger can be fitted into the groove, or the porous member can be inserted and fitted into the upper end portions between the plate fins to spray water from the upper part. May be.

[0006]

Since the present invention has the above-mentioned configuration, the water sprinkled from the sprinkler passes through the porous member provided at the upper end of the plate fin of the heat exchanger and falls on each plate fin of the heat exchanger. go. Since the porous member is in contact with each plate fin, the water always falls on both sides of each plate fin due to its surface tension. Therefore, the water sprinkled from the sprinkler is evenly distributed to the entire upper end of each plate fin by the porous member provided in contact with the upper end of the fin.
Each plate fin is evenly sprinkled to improve the cooling efficiency by sprinkling.

[0007]

Embodiments of the present invention will be described below with reference to FIGS. 1, 2 and 3. FIG. 1 shows a cooling device according to an embodiment of the present invention, in which a cooling tower section 10 is provided at an upper portion and a refrigerator section 20 is provided at a lower portion.
Is provided. The cooling tower section 10 has an outside air suction port 11 on a side portion and an exhaust port 12 on an upper portion. Suction port 1
1, a louver 13 is provided, and an exhaust fan 12 is provided with a blower fan 14. The louver 13 serves to adjust the air flow by the fan 14 so as to pass through the inside of the cooling tower section 10 as efficiently as possible, sucks the outside air by the fan 14, and is discharged by the heat exchanger 30 with the plate fins 31. Exhaust heat to the top.

The heat exchangers 30 are arranged in a pair of V shapes on the left and right, and cooling water and refrigerant pass through the left and right heat exchangers 30, 30. This heat exchanger has a multi-layer plate fin 31 in which a copper pipe 32 for passing cooling water and a copper pipe 33 for passing a refrigerant of a refrigerator are incorporated. The copper pipes 32 and 33 of the heat exchanger 30 have a large heat transfer area on the outer surface of the copper pipes by the plate fins 31, and have good heat exchange efficiency and high cooling efficiency. A sprinkler tank 15 is provided on the upper part of the heat exchanger 30, and a porous member 40 that allows water to pass between the sprinkler tank 15 and the upper end of the heat exchanger 30 is provided in contact with each plate fin 31 of the heat exchanger. is there.

In the embodiment shown in FIG. 1, the sprinkler tank 15 is provided with a sprinkler port 36 at a position where the bottom surface is high, and the water overflowing from the sprinkler port 36 continuously flows to the upper surface of the porous member 40, so that the porous member Plate fin 3 of the heat exchanger 30 passing through 40
It is designed to be dropped into 1. The water sprinkling port 36 may be provided with a large number of water sprinkling ports on the entire lower surface of the water sprinkling tank 15 so that water can flow directly from the lower surface of the water sprinkling tank 15 to the upper surface of the porous member 40. As the porous member 40, a laminated glass wool 41 having a thickness of about 15 mm is used, and the upper end of the plate fin 31 and the water spray tank 1 are used.
Water droplets which are sandwiched between the lower surface of No. 5 and the glass fin 41 and adhere to the plate fins 31 are evaporated by the air blow of the upper fan 14, and are discharged from the exhaust port 12. 1
6 is the lower water receiving tank, and the water in the water receiving tank 16 is the filter 4
After being filtered by 2, the water pipe 1 by the water spray pump 17
It passes through 8 and is sent to the sprinkling tanks 15 and 15 on either side.

FIG. 3 is a partially enlarged view showing the relationship between the porous member 40, the multilayer plate fins 31 of the heat exchanger, and the sprinkler tank 15 showing another embodiment. In this embodiment, the porous member 40
Is formed of a foam resin sponge 43, and the sponge 43 is compressed in half to have a thickness of 20 mm, and a groove 44 into which the upper end of the multilayer plate fin 31 is inserted is provided on the lower surface side. The upper end of each plate fin is inserted into the groove 44. Water-tight tape or paint 45 is adhered to the lower surface side between the grooves 44 so that the water that has passed through the sponge 43 from the sprinkler tank 15 does not fall in the middle between the plate fins 31 and 31 and must always be kept in contact with each other. The plate fins 31 are arranged to drop along both side surfaces of the plate fins 31. Further, the groove 4 is formed on the porous member.
Instead of providing 4, the porous member 40 may be inserted and fitted in the upper portion between the plate fins. The porous member 40 is not limited to glass wool or sponge, and may be cloth, paper with a large number of fine holes, vinyl sheet, or the like, and may be metal or pumice stone having porosity.

On the other hand, below the cooling tower section 10 is provided a refrigerator section 20 comprising a compressor 21, a condenser 33, an expansion valve 23, and an evaporator 24. The refrigerant compressed by the compressor 21 radiates heat in the condenser 33 in the heat exchanger 30,
It is arranged to repeat the cycle of evaporating and absorbing heat in the evaporator 24 via the expansion valve 23. Capacitor 3
3 is piped in the heat exchanger 30, and is cooled by a water sprinkler in the cooling tower and the fan 14. The high-temperature water that has been warmed by heat exchange with an external device passes through the return pipe 19 and the heat exchanger 30 in the cooling tower section, where it is cooled. Next, the water cooled in the cooling tower section 10 is sent to the evaporator 15 of the refrigerator section 20 to be cooled, and after passing through the evaporator 24, is sent by the pump 25 through the delivery pipe 26 to the external equipment. The water used for heat exchange in the external device again enters the cooling device through the return pipe 19.

The cooling water and the refrigerant are piped in the heat exchanger 30 of FIG. 2, and the water in the sprinkler tank 15 passes through the porous member 35 and is evenly dropped on the entire upper part of the multi-layer plate fin 31 of the heat exchanger. However, a film of water is formed on the entire fins 31 to remove heat from each plate fin 31, and the film of water attached to the fins is evaporated by the air blown by the fan 14 and the cooling water or the refrigerant passing through the heat exchanger. Cooling is performed. As a result of sprinkling water evenly on each plate fin of the heat exchanger, the cooling water and the refrigerant are evenly cooled in the heat exchanger 30. When cooling water is cooled by only one of the cooling tower and the refrigerator during the summer or winter, the coil 32 or 33 on the non-operating side also serves as the heat transfer area of the operating coil, Along with improvement of watering efficiency, heat exchange efficiency improves and cooling efficiency increases.

[0013]

As described above, according to the present invention, since water is sprinkled evenly on each plate fin of the heat exchanger with plate fins, a water film is formed on the entire fins to cool in the cooling tower. The efficiency is high, and the positional relationship of the refrigerant passing through the heat exchanger is not affected, and the cooling is performed uniformly. In addition, the amount of water sprinkled was also greatly reduced compared to the past, and it became possible to reduce the size of the pump for water sprinkling and make the entire cooling tower compact.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a cooling device showing an embodiment of the present invention.

2 is a perspective view showing the heat exchanger with plate fins of FIG. 1. FIG.

FIG. 3 is a partially enlarged view showing a relationship between a heat exchanger and a porous member according to another embodiment.

FIG. 4 is a sectional view of a cooling device showing a conventional technique.

[Explanation of symbols]

10 Cooling Tower Part 11 Suction Port 12 Exhaust Port 13 Louver 14 Juan 15 Water Sprinkler Tank 16 Water Receptor Tank 17 Pump 18 Water Pipe 19 Return Pipe 20 Refrigerator Unit 21 Compressor 23 Expansion Valve 24 Evaporator 25 Pump 26 Delivery Pipe 30 Heat Exchanger 31 Plate Fin 32 Copper Pipe Through Which Cooling Water Passes 33 Copper Pipe (Condenser) Through Which Refrigerant 40 Porous Member 41 Laminated Glass Wool 42 Filter 43 Sponge 44 Groove 45 Water-Impermeable Tape or Paint

Claims (1)

[Claims] 1. A cooling tower in which a heat exchanger with plate fins is provided in a cooling tower, and a refrigerant such as cooling water flowing in the heat exchanger is sprinkled with the latent heat of vaporization to cool the refrigerant. A porous member that allows water to pass through is provided in contact with the upper end of the plate fin of the container, a sprinkler tank is provided on the porous member, and the water in the sprinkler tank is sprinkled through the porous member to the plate fins. cooling tower.