JPH06109378A - Forced cooling tower - Google Patents

Abstract

PURPOSE:To provide an open type or closed type cross flow type cooling tower capable of eliminating disadvantages of a cross-flow type and a counter-flow type cooling towers and of having only the advantages. CONSTITUTION:An open type cooling tower is comprised of an upper water tank 2 for storing cooling water, a heat exchanger arranged below the upper water tank 2 and a forced fan 5 arranged below the heat exchanger 3 and for supplying cooling air to the heat exchanger 3. The cooling water is cooled at the heat exchanger 3 with cooling air supplied from a forced fan 5. Then, there is provided a flow passage structure in which the cooling air from the forced fan 5 is passed through the heat exchanger 3 in a lateral direction.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closed or open type push-in type cooling tower mainly used for air conditioning.

[0002]

2. Description of the Related Art A cooling tower is used for cooling a condenser of a refrigerator to cool and recycle the heated cooling water, and an open type cooling tower in which the cooling water comes into direct contact with outside air, and a cooling tower. Water passes through the heat transfer tube and is roughly divided into a closed cooling tower that does not come into direct contact with the outside air. Further, the closed type cooling tower is classified into a water cooling type in which water is sprinkled on the outer surface of the heat transfer tube and an air cooling type in which water is not sprinkled.

In both the open type and the closed type, there are a cross-flow type in which cooling air and cooling water in contact with the air are orthogonal to each other, and a counter-current type in which they are opposed to each other. It is classified into a suction type and a push type in which air is pushed into the cooling tower.

Among the open type cooling towers, the cross flow type cooling tower is one in which the front surface of the heat exchanger is opened to the atmosphere and used as an air intake port, and air is drawn into the tower by a blower arranged above the heat exchanger. Is. This method is the most general structure, and has characteristics such as good heat exchange efficiency and a small blower capacity.

However, in this open type cross flow type cooling tower, water is more likely to be scattered than the air intake port, a sufficient space is required in front of the air intake port so as not to re-induce the discharge air of the blower, and the lower part of the blower. The large space requires a large installation area.The large air intake makes it easy for dust, insects, birds, etc. to enter.Because there is a blower at the air outlet, the air will stick if the outside temperature is negative. There is a problem that water drops etc. tend to freeze.

On the other hand, in order to relatively eliminate the above-mentioned drawbacks, a push-type countercurrent type in which the periphery of the heat exchanger is covered with side plates and water is sprinkled from the upper part of the heat exchanger while air is flown into the cooling tower from the lower part. Cooling towers are known.

However, this countercurrent type push-type cooling tower is
Since the air resistance becomes large, it is not possible to make the heat exchanger high, and in the case of a large size, the installation area becomes large.Because the water flowing in contact with air flows in the same direction, there is no nozzle for watering. Needed, this nozzle is easily clogged,
There are problems such as a large amount of water splashing from the air outlet.

Further, the closed cross-flow type has almost the same structure as the open cross-flow type, but a filling material as a heat exchanger for cooling the sprayed water and a substantially horizontal flow through which the fluid to be cooled flows. The heat transfer tubes that meandered in the direction of the above are alternately stacked.

This closed cross-flow type has the same drawbacks as the open cross-flow type, and since the heat exchanger faces the air intake port and is not covered with the outer plate of the tower body, it is easy for wind to enter and the outside air Is a negative temperature, and there is not sufficient heat supply to the fluid to be cooled in the heat transfer tube, there is a problem that the fluid to be cooled easily freezes.

Furthermore, a push-in countercurrent type is known as a device in which the drawbacks of the closed crossflow type are relatively solved. This counter-current type has a heat transfer tube that meanders in a substantially vertical direction.
The fluid to be cooled flows from the upper side to the lower side, water is sprinkled from the upper part of the heat exchanger composed of the heat transfer tube group, and air is made to flow in from the lower part and discharged to the upper part. In addition, there is also one in which the filler is arranged above the heat exchanger.

This push-type countercurrent cooling tower has the same drawbacks as the above-mentioned open countercurrent type, and has a fatal drawback that the heat exchange efficiency is lower than that of the crossflow type.

[0012]

The problem to be solved by the present invention is to eliminate the drawbacks of both the cross flow type and the counter flow type, and to open the open type and closed type cross flow type cooling towers having only the advantages. To provide.

[0013]

In order to solve the above-mentioned problems, the cooling tower of the present invention has an upper water tank for storing cooling water, a heat exchanger provided below the upper water tank, and the same heat exchanger. And a push-in fan that supplies cooling air to the heat exchanger, and the cooling water is cooled in the heat exchanger by the cooling air supplied from the push-in fan. In the cooling tower, the cooling air from the push-in fan is provided with a flow passage structure that laterally passes through the heat exchanger.

Further, an upper water tank for storing sprayed water, a heat exchanger provided below the upper water tank, and a push-in type provided below the heat exchanger for supplying cooling air to the heat exchanger. A closed cooling tower, comprising a fan, wherein the fluid to be cooled in the heat exchanger is cooled by spray water sprayed from the upper water tank and cooling air supplied from the push-type fan. The cooling air from the fan is provided with a flow passage structure that laterally passes through the heat exchanger.

Here, as the heat exchanger, one having a substantially parallelogram shape in which the inlet side and the outlet side of the cooling air are inclined with respect to the vertical axis can be used.

[0016]

In the present invention, although it is a push type, the sprayed water or cooling water and the cooling air are of a so-called cross flow type having a low air resistance, and the fan can be downsized while taking advantage of the push type cooling tower. Can be achieved. Also, by making the heat exchanger into a substantially parallelogram shape in which the inlet side and the outlet side of the cooling air are inclined with respect to the vertical axis, the air can uniformly and horizontally pass through the heat exchanger. become.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be specifically described below with reference to embodiments shown in the drawings.

FIG. 1 is a vertical sectional view of an open type cross flow type cooling tower which is a first embodiment of the present invention, in which 1 is a cooling tower main body.
Reference numeral 2 is an upper water tank provided at the uppermost part of the cooling tower main body, and 3 is a filler as a heat exchanger, which is arranged below the upper water tank. As shown in the figure, the filling material 3 has its upper and lower surfaces formed horizontally, and its side surface portions, that is, the air inlet side 3a and the air outlet side 3b are respectively inclined with respect to the vertical axis so that their vertical cross-sectional shapes are parallel. It has a quadrilateral shape. Further, the lower part of the cooling tower body 1 is reduced in cross section to form a lower water tank 4 for storing cooling water, and a sirocco fan 5 for supplying cooling air to the filler 3 is provided on a side surface of the lower water tank 4. Is provided. With such a structure, the cooling air from the sirocco fan 5 constitutes a flow passage structure that laterally passes through the filler 3. Further, the lower water tank 4 is connected to the upper water tank 2 via the pump 11 and the refrigerator 6. 7 is an eliminator for preventing water splashing, and 8 is a louver.

In the above structure, the cooling water that has been heat-exchanged and heated in the refrigerator 6 is supplied to the upper water tank 2 and is sprayed from the upper water tank 2 to the entire surface of the filler 3 arranged in the lower portion. On the other hand, in conjunction with this, the sirocco fan 5 operates, and cooling air is forcibly supplied into the cooling tower from below.
The cooling air comes into contact with the cooling water sprinkled on the filler 3 to exchange heat with the cooling water to lower the temperature of the cooling water. At that time, the flow of the cooling air shown by the arrow is a cross flow type that is orthogonal to the spray direction of the cooling water, that is, the vertical direction, and has less air resistance than the conventional countercurrent type push-type cooling tower. It is possible to significantly reduce the capacity of the fan. The cooling water cooled in the filler 3 is used in the lower water tank 4
And is supplied from the lower water tank 4 to the refrigerator 6 by the pump 11 again and used as a heat exchange medium. Further, since the filler 3 has a parallelogram shape, the air flows evenly in the filler 3, and even if the sprayed water is pushed by the air, it flows to the front along the surface of the filler without departing from the filler. As a result, efficient heat exchange becomes possible.

FIG. 2 shows still another embodiment, which is an application example to a closed type. In this embodiment, the same parts as those in the previous embodiment are designated by the same reference numerals and the description thereof will be omitted.

Reference numeral 10 denotes a heat transfer tube as a heat exchanger. In the figure, an inlet 10a is provided at the lower left stage, an outlet 10b is provided at the upper right stage, and headers 10c are provided at the air inlet side and the air outlet side. The coil 10d is meanderingly arranged substantially horizontally so as to be connected. A fluid to be cooled flows inside the heat transfer tube 10 and is connected to the pump 11 and the refrigerator 6. The lower water tank 4 is connected to the upper water tank 2 by a pump 12 and a sprinkling pipe 13. Reference numeral 14 is a filler for sprinkling disposed on the upper portion of the heat transfer tube 10, and 15 is a closing plate for closing the lower portion of the heat transfer tube 10 to collect the sprayed water. In the present embodiment, the sprayed water is guided to the discharge port 15a on the left side of the drawing by the closing plate 15 at the lower part of the heat transfer tube 10, and further the lower water tank 4
Flows into.

In the cross-flow type cooling tower of this embodiment as well, although it is a push-in type cooling tower, a cross-flow structure is formed in which the cooling air from the sirocco fan 5 laterally passes through the heat transfer tube 10. The mold can be realized, and the capacity of the fan can be reduced while maintaining the advantages of the push-type cooling tower. In particular, since it is a closed type, the fluid to be cooled in the heat transfer tube is unlikely to freeze due to the outside air, and the cooling tower has high heat exchanger efficiency.

[0023]

According to the present invention, the following effects can be obtained.

(1) Since there is no splashing of water from the air intake port and the discharge port and freezing of the blower, and since it is a cross flow type, the height of the heat exchanger can be increased and the installation area can be reduced. it can.

(2) While taking advantage of the push-type cooling tower,
In addition, the cooling air fan can be downsized.

(3) In particular, in the case of the closed type, the fluid to be cooled in the heat transfer tube is unlikely to be frozen by the outside air, and the cooling tower has a high heat exchanger efficiency.

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view of an open type cross-flow cooling tower that is a first embodiment of the present invention.

FIG. 2 is a vertical cross-sectional view of a closed cross-flow cooling tower that is a second embodiment of the present invention.

[Explanation of symbols]

1 cooling tower body, 2 upper water tank, 3 filler, 3a inlet side, 3b outlet side, 4 lower water tank, 5 sirocco fan, 6 refrigerator, 7 eliminator, 8 louver, 10
Heat transfer tube (heat exchanger), 10a inlet, 10b outlet,
10c Header, 10d Coil, 11,12 Pump, 13 Sprinkling pipe, 14 Filling material, 15 Closure plate, 15
a outlet

Claims (3)

[Claims] 1. An upper water tank for storing cooling water, a heat exchanger provided below the upper water tank, and a push-in type provided below the heat exchanger for supplying cooling air to the heat exchanger. A fan, wherein the cooling water is cooled in the heat exchanger by the cooling air supplied from the push-type fan, wherein the cooling air from the push-type fan is the heat exchanger. An indentation type cooling tower, which is provided with a flow passage structure that laterally passes through. 2. An upper water tank for storing sprayed water, a heat exchanger provided below the upper water tank, and a push-in type provided below the heat exchanger for supplying cooling air to the heat exchanger. A closed cooling tower, comprising a fan, wherein the fluid to be cooled in the heat exchanger is cooled by spray water sprayed from the upper water tank and cooling air supplied from the push-type fan. A forced cooling tower, comprising a flow passage structure for allowing cooling air from a fan to laterally pass through the heat exchanger. 3. The indenter according to claim 1, wherein the heat exchanger has a vertical cross-sectional shape that is a substantially parallelogram shape in which the inlet side and the outlet side of the cooling air are inclined with respect to the vertical axis. Type cooling tower.