JP2579515B2 - Heat exchanger made of synthetic resin for cooling tower and DC-type cooling tower using heat exchanger composed of this heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a heat exchanger for a cooling tower and a cooling tower using a heat exchanger including the heat exchanger.

(Prior Art) Conventionally, this type of gas-liquid non-contact type heat exchanger has been disclosed in
No. -100370, the structure of which is entirely made of synthetic resin, a plurality of flat liquid flowing passages parallel to each other in a vertical direction, and a vertical formed respectively between these liquid flowing passages. Cooling, which has a flat, air-flowing air passage having a surface in the direction, and wherein the two liquid passages are separated by a heat-exchange partition plate made of a plurality of synthetic resin plates that make the liquids of the two liquids out of contact with each other. A tower heat exchanger is described,
Both walls of each air passage are formed by inverted U-shaped members, and the corrugated side walls of adjacent inverted U-shaped members are bonded to each other by protruding rib portions, and are mutually connected at their side edges by connecting panels. They are connected to form the liquid flow passage.

In the heat exchanger described in this publication, several heat exchangers are suspended and supported hierarchically inside a filler facing the outside air intake of a cooling tower as shown in FIG. It is aimed at prevention.

(Problems to be Solved by the Invention) As described above, in the prior art, a narrow and bent liquid passage is formed in order to slow down the flow rate of the liquid. Adhered to the liquid passage, substantially reduced the cross-sectional area of the liquid passage, could not flow down the predetermined flow rate, overflowed on the supply side of these heat exchangers,
Not only do these areas become mischievous, but also the loss of circulating refrigerant.

In the case where several heat exchangers are suspended and supported hierarchically inside the packing material facing the outside air intake of the cooling tower (FIG. 10), the desired white color is produced by the overflow phenomenon on the supply side. In some cases, it is not possible to prevent the generation of smoke. In addition, since the fluid passage is narrow, air that has entered the interior is difficult to escape, and stays in this passage to hinder heat exchange.

According to the present invention, the liquid supply / discharge amount can be kept constant as a whole heat exchanger even if the liquid passage in the main part of the gas-liquid non-contact type heat exchanger performing heat exchange is partially clogged. To provide a heat exchanger that does not affect the flow rate of the liquid passage and that smoothly allows the invading air to escape, and to provide the cooling tower using the heat exchanger. And

(Means for Solving the Problems) In order to achieve the above object, the heat exchanger made of synthetic resin for a cooling tower of this specific invention is a flat thin-walled hollow body as a whole, the inside of which is a liquid flow passage, and the hollow body A circulating cooling water supply part which is open to the outside is formed at the upper part of the liquid flow path, and a discharge part which is open to the outside is also provided at the lower end of the liquid flow path which is the lower edge of the hollow body. Most of the width of is a falling liquid slow part, and this falling liquid slow part has a horizontally long baffle seal section distributed over the entire surface in a hierarchical manner over multiple stages, and one of these baffle seal sections is placed. And a meandering channel is formed between the baffle seal portions.The falling liquid slow portion is disposed adjacent to the vertical overflow channel via at least one vertical seal portion,
The upper end of the vertical seal portion is in the form of a weir, and the overflow channel and the liquid reservoir at the uppermost stage in the slowing down liquid portion are interconnected through the weir, and the meandering slow down flow An air vent hole is formed at the bent path position of the portion, which traverses the vertical seal portion and opens into the overflow channel, and a raised portion is formed as a spacer on the outer surface of both wall plates. Features.

In order to solve the above-mentioned problem, it is desirable that the hollow body is a vacuum or blow molded product.

In order to solve the above-mentioned problem, it is desirable that the overflow channel in the heat exchanger is provided along one side edge of the hollow body.

In order to solve the above problem, it is more preferable that the overflow channel in the heat exchanger is provided along both side edges of the hollow body.

In order to solve the above-mentioned problem, the bent downflow liquid slow portion in the heat exchanger is separated from the second to fourth fluid passages by a vertical obstruction seal portion at the center thereof. There is also.

In order to solve the above-mentioned problem, both walls of the meandering flow passage between the horizontally long obstruction seal portions vertically adjacent to each other in the cooling tower synthetic resin heat exchanger are almost completely downstream of the both walls. It may be in the form of a corrugated sheet with parallel ridges inclined 45 degrees upward and downward.

In order to solve the problem, the cross-flow cooling tower is arranged in parallel with a predetermined number of heat exchangers according to claim 1 with a slight gap between the protrusions and abutment or contact with each other, A narrow horizontal air flow passage is formed between adjacent heat exchangers to form an indirect heat exchanger for the cooling tower, and a plate-like corrugated sheet provided facing the outside air intake of the cooling tower. On the secondary side of the packing material, each air flow passage of the indirect heat exchanger is made horizontal in the same direction as the air passage of the packing material, one side thereof is used as the packing material side, and the secondary side thereof is a cooling tower. The indirect heat exchanger is arranged on the entire width and height of the filler as the air chamber side from the exhaust port.

In order to solve the above problem, the upper edge of the hollow body is opened over the entire width, and both wall plates of the upper edge project outward at the same height as the raised portion, and the central portion of the upper edge is concave U-shaped. The supply portion is formed at the bottom of the depression, and the upper edge of the heat exchanger adjacent to the heat exchanger at the time of assembling on the outer peripheral surface is in close contact and extends in the longitudinal direction. It is preferable to have a shape that forms a circulating cooling liquid reservoir.

(Operation of the Invention) The operation of the heat exchanger according to the first to fifth aspects of the present invention will be described together with the operation of the cross-flow cooling tower according to the seventh aspect.

First, a plurality of heat exchangers are arranged in parallel using a case or an appropriate support frame, and the ridge is used as a kind of spacer, thereby forming a narrow air flow passage between adjacent heat exchangers. Form and assemble an indirect heat exchanger of desired dimensions.

The heat exchanger thus assembled is arranged inside the packing material of the crossflow cooling tower. At this time, a supply pipe for supplying the circulating cooling liquid to the upper water tank above the filler is branched from the middle, and the branch pipe is provided with a valve to be used as a header for supply to the heat exchanger group.

In this state, the blower of the cooling tower is driven to rotate, and cooling water as a circulating refrigerant (about 30 to 70 ° C.) warmed by an air conditioner or a refrigerator as a load unit is supplied to each of the heat exchangers through the supply header. When the cooling water is supplied from the portion to the position of the slowly flowing down liquid portion, the cooling water sequentially flows down while meandering in the meandering flow path formed between the baffle seal portions, and is sufficiently stirred with both wall plates of the heat exchanger. Contact with both wall plates for a much longer time than just flowing down vertically, heat exchange with the air flowing horizontally through each of the air flow passages through these wall plates, and warm them simultaneously. The heat is taken by the air and cooled accordingly.

During the operation of the cooling tower, the air remaining in the flowing liquid slow-moving part is pushed to the upper corner of the curved path of the flowing liquid slow-moving part by the movement of the cooling water slightly rising upward by the ridges. Although it is damaged and tries to stay in this portion, it flows into the overflow channel through the air vent hole, rises in the overflow channel, and is discharged from the supply unit to the outside.

By arranging the group of heat exchangers of the present invention at the inside position of the packing material disposed inside the cooling tower, the cooling medium is brought into direct contact with the cooling water on the packing material, and the temperature rises to increase the absolute temperature. All of the resulting air flows into all the air flow passages of the heat exchanger group of the present invention. On the other hand, the cooling water flowing meandering down the curved falling liquid slow portion of the heat exchanger is indirectly cooled by the air passing through the air passage during the flow, and the cooling water is cooled by itself. The heated air is exhausted from the exhaust port to the outside of the cooling tower without white smoke (see FIG. 6).

If the supply amount of cooling water pulsates, or if the supply amount temporarily increases, or microorganisms adhere to the slow-flowing liquid slow path, the cross-sectional area of the slow-flowing liquid slow path decreases, When the flow rate decreases and the water level in the liquid reservoir rises and becomes higher than the weir, a part of the cooling water directly flows down through the overflow channel and does not overflow out of the heat exchanger.

During the operation of the cooling tower, the supply section of each heat exchanger is open to the outside air, and the cooling water arranged in the cooling tower in a natural flow manner is meandering in the slow flowing liquid flow path. It flows down. Then, at the same time when the operation of the cooling tower is stopped, the cooling tower receives the atmospheric pressure and is discharged from the discharge section to the outside.

In the invention described in claim 6,
In addition to the above operation, the inner surfaces of the two wall plates constituting the slowing portion of the flowing liquid are almost all over the two walls, and the lower the downstream side, the higher the upper surface.
In the case of a corrugated plate with parallel ridges that are inclined inside and outside, the cooling water circulating in the meandering channel is guided upwards and rises slightly as it gets over these ridges, and is drawn back upstream. The cooling water is filled up to the upper part of the flow path of each horizontal part of the meandering flow path or wets at least up to the upper part of the inner wall surface of the horizontal part and reaches the bent position, and for a long time almost the entire surface of both wall plates Keep in contact with.

During the operation of the cooling tower, the air remaining in the flowing liquid slow-moving part is pushed to the upper corner of the curved path of the flowing liquid slow-moving part by the movement of the cooling water slightly rising upward by the ridges. Although it is damaged and tries to stay in this portion, it flows into the overflow channel through the air vent hole, rises in the overflow channel, and is discharged from the supply unit to the outside.

By arranging the group of heat exchangers of the present invention at the inside position of the packing material disposed inside the cooling tower, the cooling medium is brought into direct contact with the cooling water on the packing material, and the temperature rises to increase the absolute temperature. All of the resulting air flows into all the air flow passages of the heat exchanger group of the present invention. On the other hand, the cooling water flowing meandering down the curved falling liquid slow portion of the heat exchanger is indirectly cooled by the air passing through the air passage during the flow, and the cooling water is cooled by itself. The heated air is exhausted from the exhaust port to the outside of the cooling tower without white smoke (see FIG. 6).

If the supply amount of cooling water pulsates, or if the supply amount temporarily increases, or microorganisms adhere to the slow-flowing liquid slow path, the cross-sectional area of the slow-flowing liquid slow path decreases, When the flow rate decreases and the water level in the liquid reservoir rises and becomes higher than the weir, a part of the cooling water directly flows down through the overflow channel and does not overflow out of the heat exchanger.

During the operation of the cooling tower, the supply section of each heat exchanger is open to the outside air, and the cooling water arranged in a naturally flowing manner flows down the meandering path in the flowing liquid slow path. Then, at the same time when the operation of the cooling tower is stopped, the cooling tower receives the atmospheric pressure and is discharged from the discharge section to the outside.

In the invention described in claim 8,
The upper edge of the hollow body is opened over the entire width, and both wall plates of the upper edge project outward at the same height as the raised portion, and the central portion of the upper edge is formed as a U-shaped depression. The supply portion is formed at the bottom of the depression, and the upper edge is a circulating coolant reservoir that extends and extends in the longitudinal direction, with the upper edges of adjacent heat exchangers being in close contact with each other at the time of assembly on the outer peripheral surface. In the case of having a shape to be formed, by arranging a plurality of the heat exchangers adjacent to each other and in parallel, the upper edge of the heat exchanger is used as a circulating cooling liquid reservoir, and the supply header is horizontally disposed in the reservoir. Piping, circulating cooling water is supplied from the supply header to the reservoir, and each heat exchanger is formed from a supply port of each heat exchanger formed at the bottom of the recess of each heat exchanger constituting the reservoir. Flows into

The explanation of the action is in winter or when the outside air is low temperature,
In other summer months or when the outside air is at a high temperature, the valve of the supply header is closed to stop the supply of the circulating cooling water to the heat exchanger.

(Effect of the Invention) In the heat exchanger according to the present invention, which is configured and operates as described above, a part of the slow-flowing liquid slowing part, which is a main part for performing heat exchange, is temporarily clogged or restricted in flow rate. Even if the flow rate of the supply cooling water changes temporarily and the water level in the liquid reservoir rises, the cooling water is discharged downward through the overflow channel, which is a part of the heat exchange drainage channel, over the weir. Therefore, there is no possibility of limiting the amount of passing water itself.

Further, at the start of the operation of the cooling tower, the air remaining in the slow-flowing liquid slow section is pushed by the cooling water to the upper part of the curved path of the slow-flowing liquid slow section, and flows into the overflow channel through the air vent hole. Since the water rises in the overflow channel and is discharged from the supply section to the outside, the air hardly remains in the slow flowing-down liquid section, and does not hinder heat exchange.

If the hollow body according to the second aspect of the present invention is a vacuum or blow molded product, the production of the heat exchanger is easy and inexpensive.

In the invention according to claim 3, if the overflow channel is provided along one side edge of the hollow body, it is easy to form the overflow channel, and the invention according to claim 4 is provided. If the overflow channel is provided along both side edges of the hollow body, the effect relating to the overflow channel and the air vent hole can be doubled.

In the invention described in claim 5, if the bent downflow liquid slow portion is separated into two or four series of fluid passages by a vertical partition seal portion at a center portion thereof, The circulating cooling water can be distributed uniformly over the entire surface of the heat exchanger.

In the invention described in claim 6, further,
A cooling tower characterized in that the inner surface of the two wall plates constituting the slow liquid slow-down portion is a corrugated plate formed with parallel ridges inclined upward and downward by about 45 degrees as the downstream side extends over substantially the entire surfaces of the two walls. In the heat exchanger made of synthetic resin for use, in addition to the effect of the specific invention described above, the cooling liquid circulating in the meandering flow path is guided upward and slightly swells as it gets over these ridges.

In this case, even if air remains on the upper side of each horizontal flow path portion, the air is pushed out from the air vent hole by the rising cooling water, so that the residual air inside the horizontal flow path portion is It does not inhibit the rise of the water level.

In addition, the cooling water rises to the upper part of the flow path of each horizontal part of the meandering flow path, fills each of these horizontal parts or wets at least the upper part of the inner wall surface of the horizontal part, and reaches the bent position, As compared with the case without the ridges, the time for the circulating coolant to pass through the meandering flow path is longer, and the surface area of contact between the both wall plates and the circulating coolant is larger. The heat exchange rate of the contact can be increased.

In the cross-flow cooling tower according to the invention described in claim 7, even if a part of the slow liquid flow path is clogged, it is a part of the heat exchange flow path beyond the weir. Since the cooling water is discharged from the lower opening through the overflow channel, the supply amount does not drastically decrease without the cooling water overflowing from the supply unit, and the amount of the cooling water between the air and the cooling liquid in the heat exchanger is reduced. The amount of indirect heat exchange does not decrease, and the entire tree can prevent a desired generation of white smoke when the outside air is at a low temperature. In addition, it goes without saying that the same effect as the heat exchanger is exhibited.

In the invention described in claim 8, the upper edge of the hollow body is opened over the entire width, the upper edge of the hollow body is opened over the entire width, and both wall plates of the upper edge are outwardly provided with the raised portion. At the same height, the center of the upper edge is formed in a U-shaped dent, and the supply portion is formed at the bottom of the dent. In the case where the upper edges of the exchanger are in contact with each other and form a circulating cooling liquid reservoir portion extending in the longitudinal direction, a supply header is horizontally piped above the liquid reservoir portion, and the header is provided. Even if the circulating cooling liquid discharged from the heat exchanger is slightly larger than the capacity of the heat exchanger composed of the parallel heat exchangers, it stays in the liquid reservoir once and does not flow out of the heat exchanger,
With a simple piping structure, circulating cooling water can be supplied to each heat exchanger liquid flow-down passage without using power in a natural flow manner to exchange heat.

(Embodiment) Next, a representative embodiment of the invention described in claims 1 to 6 will be described.

Example 1 In FIG. 1, reference numeral 10 denotes a heat exchanger.
10 is preferably a flat hollow body made of a synthetic resin formed by vacuum molding or blow molding, and the inside thereof is a liquid flow passage. The synthetic resin is not particularly limited, but may be polyvinyl chloride, polyethylene, polypropylene, or the like. An inexpensive one with good moldability is preferred.

A cylindrical supply port which is a kind of a circulating cooling liquid supply unit opened to the outside at the upper edge corner of the heat exchange body 10 formed of the hollow body.
In addition, a discharge port 12 which is a kind of a circulating cooling liquid discharge section which is open to the outside is provided at a lower corner of the lower portion. The supply port 11 and the discharge port 12 are on the same side, that is, on the left side in the drawing, but are not limited to this position.

A peripheral seal portion 16 formed by welding both wall plates 14 and 15 is formed around the hollow body 10 which is the heat exchange body, and is parallel to the side edges 17 and 18 of the heat exchange body 10 and from both side edges 17 and 18. At a position slightly inside, the two wall plates 14 and 15 are connected to the side edges 17 and 18.
Vertical seal portions 19 welded to each other are formed along
The upper and lower edges of the two right and left vertical seal portions 19 do not reach the upper and lower edges 20, 21 of the heat exchanger 10, respectively.

At the center of the two right and left vertical seal portions 19, a horizontally long obstruction seal portion 22 in which the two wall plates 14 and 15 are welded to each other is hierarchically distributed over a plurality of steps over the entire surface. The obstructing seal portions 22 are arranged at every other position, and the flowing liquid slow portion 24 occupying most of the width of the liquid flowing passage as a meandering flow passage 23 between these seal portions 22.
Are formed, and the both wall plates 1 in the falling liquid slow section 24 are formed.
Reference numerals 4 and 15 are main heat exchange surfaces of the heat exchanger 10.

On the other hand, a narrow vertical portion between each vertical seal portion 19 and each side edge 17, 18 is an overflow channel 25, and an upper end 26 of the vertical seal portion 19 is shaped as a weir, and Of the seal portions 22, the highest one 22a is formed slightly lower than the upper end 26, and the uppermost obstruction seal portion 22a, the upper end edge 20 of the hollow body and the two wall plates 14, 15 are formed. To form a liquid reservoir 40. The liquid reservoir 40 and the overflow channel 25 are connected to the weir
They are interconnected through 26.

In the case of the drawing, the flowing-down liquid slowing portion 24 is divided into two series of fluid passages 23a and 23b by a vertical and discontinuous partition seal portion 50 at a central portion except for the liquid reservoir portion 40 in the case shown.

An air vent hole 60 that opens across the vertical seal portion 19 and opens into the overflow channel 25 is formed at the position of each bent path 24a of the meandering slow flow section 24, that is, at the upper corner of the bent path 24a. A raised portion 70 is formed on the outer surfaces of the two wall plates 14 and 15 as a spacer.

Furthermore, the long obstruction seal portion is formed on the inner surface of both wall plates constituting the flow-down liquid slow portion 24, that is, in the horizontal direction adjacent vertically.
The inner surface of both wall plates forming the meandering flow path 23 between the 22 is a corrugated plate in which parallel ridges 80 inclined upward and downward by about 45 degrees are formed on the inner and outer sides of the entire wall substantially toward the downstream side.

The overflow channel 25 may be provided only on one side edge 17 or 18, and the upper edge 20 of the hollow body 10 is opened over the entire width so that the two wall plates 14, 15 of the upper edge 20 are outwardly protruded. At the same height as the part 70, the center of the upper edge 20 is concave and U-shaped concave
The upper edge 20 is formed on the outer peripheral surface, and the upper edges 20 adjacent to each other at the time of assembling are brought into close contact with each other, and the circulating cooling pool portion 20b extending in the longitudinal direction is formed by the recesses 20a. The shape to be formed may be used. Instead of the discharge port 12, the lower end edge 21 of the hollow body may be opened over the entire width to serve as a discharge portion.

The operation of the heat exchanger 10 thus configured will be described together with the operation of the representative embodiment of the cross-flow cooling tower A according to claim 7 which is a related invention.

First, a plurality of the heat exchangers 10 are arranged in parallel using a case or an appropriate support frame (not shown), and the raised portions 70 are used as a kind of spacer, whereby the adjacent heat exchangers 10 are arranged.
A horizontal air flow passage 33 having a narrow width is formed therebetween, and an indirect heat exchanger B having a desired size is assembled.

The heat exchanger B assembled in this way is arranged inside the filler C of the cross-flow cooling tower A as shown in FIG. At this time, a supply pipe E for supplying the circulating cooling liquid to the upper water tank D above the filler C branches off from the middle, and the branch pipe F is provided with a valve G to serve as a header for supply to the group of heat exchangers 10. use.

In this state, the blower of the cooling tower A is driven to rotate, and cooling water as a circulating refrigerant (about 30 to 70 ° C.) warmed by a load unit K such as an air conditioner or a refrigerator as a load unit passes through the supply header F. When supplied from the supply section of each heat exchanger to the falling liquid slow section 24, the cooling water sequentially flows down the meandering flow path 23 formed between the obstruction seal sections 22, sequentially, each wall plate 14, Contact with 15 while being sufficiently agitated, contact with wall plates 14 and 15 for a much longer time than just flowing vertically,
Through this, each of the air flow passages 33 exchanges heat with the air flowing in the horizontal direction to heat them, and at the same time, heat is taken from the air by itself and cooled accordingly.

Since both walls of the meandering channel 23 between the baffle seal portions 22 are formed in a corrugated shape in which parallel ridges 80 inclined upward and downward by about 45 degrees are formed on the inner side and the outer side toward the downstream side over substantially the entire both sides thereof, the meandering channel 23 The cooling water circulating in the inside 23 is guided upward each time it gets over these ridges 80 and rises slightly, and the cooling water reaches the upstream part and fills at least the upper part of the inner wall surface of the horizontal part and reaches the bending position 24a. , Keeps in contact with almost the entire surface of both wall boards for a long time. During the operation of the cooling tower, the air remaining in the falling liquid slow section 24 is moved upward by the ridges 80 due to the movement of the cooling water, and the air flows upward in the curved path of the falling liquid slow section 24. It is pushed to the corner and tries to stay in this part.
Flows through the overflow channel 25 through the overflow channel 25 and is discharged from the supply port 11 to the outside.

When a plurality of groups of the heat exchangers 10 are arranged in a plurality of layers in a hierarchical manner inside the filler C, the heat exchanger is directly contacted with the cooling water on the filler C to be cooled, and the temperature rises by itself. All of the heated air flows through all air passages of the heat exchanger 10.
It flows into 33.

On the other hand, the cooling water meandering down the curved falling liquid slow section 24 of the upper heat exchanger 10 flows into the falling liquid slow section 25 of the lower heat exchanger 10 from its supply port 11 sequentially. The cooling water flowing down is indirectly cooled by the air passing through the air passage 33, and the air heated by itself is discharged from the cooling tower through the exhaust port without white smoke. Exhaust (see FIGS. 2 and 6).

If the supply amount of the cooling water pulsates, or the supply amount temporarily increases, or microorganisms adhere to the falling liquid slow section 24, the cross-sectional area of the falling liquid slow section 24 becomes narrow. When the flow rate decreases and the water level in the liquid reservoir rises and becomes higher than the weir 26, a part of the cooling water directly flows down through the overflow channel 25 and out of the supply port 11 of the heat exchanger 10. Do not overflow.

During the operation of the cooling tower A, the supply port 11 of each heat exchanger 10
Is open to the outside air, and the cooling water flows down while flowing in the flowing liquid slow speed section 24 in a naturally flowing manner. And
At the same time as the operation of the cooling tower is stopped, the cooling tower receives the atmospheric pressure and is discharged from the discharge section to the outside.

In addition, the upper edge 20 of the hollow body 10 is opened over the entire width, the two wall plates 14 and 15 of the upper edge 20 project outward at the same height as the raised portion 70, and the central portion of the upper edge 20 is recessed U Character-shaped depression
The supply port 11a is formed at the bottom of the recess 20a, and the recess 20a of the adjacent heat exchanger 10 abuts and adheres to the upper edge 20 at the outer peripheral surface thereof at the time of assembling. (See FIG. 3), a plurality of the heat exchangers 10 are arranged adjacent to and in parallel with each other so that the upper edge of the heat exchanger B is formed. Is a circulating coolant reservoir 20b, the supply header F is horizontally piped into the reservoir 20b, and circulating cooling water is supplied from the supply header F toward the reservoir 20b.
Flows into each heat exchanger 10 from the supply port 11a opened to the outside at the bottom of the recess 20a of each heat exchanger 10 (see FIG. 4) (see claim 8). (Corresponds to the operation of the invention).

In this way, the circulating coolant is supplied to each heat exchanger 10, and the air is caused to flow horizontally in the air passage 33 between the heat exchangers 10. Non-contact heat exchange between water.

When the heat exchanger 10 is used as a closed type heat exchanger 10, a discharge header (not shown) similar to the supply header F is connected to these discharge ports 12 to flow inside. It is needless to say that the circulating coolant is used without being mixed with the spray water sprayed on the outer surface of each heat exchanger 10.

Further, the heat exchanging body 10 in which the discharge part 12 is formed by opening the entire width of the lower end edge 21 of the hollow body is disposed above the filler C, so that the cooling water can be uniformly distributed over the upper part of the filler. Used to prevent white smoke (see Fig. 5 and Fig. 10).

A three-way switching valve is used as the valve G, and the ratio of the flow rate of the circulating cooling water supplied to the filler and the flow rate of the circulating cooling water supplied to the indirect heat exchanger B is adjusted according to the cooling temperature. In some cases. That is, when the cooling temperature is high as in winter, the flow rate of the circulating cooling water supplied to the filler is reduced, and when the cooling temperature is low as in summer, the flow rate of the circulating cooling water supplied to the filler is reduced. The three-way switching valve can be switched and used so as to increase the number.

The present invention is not limited to the embodiment, and even if the indirect heat exchanger B is arranged in parallel with the filler C below the upper water tank D, the cross-flow cooling tower of the related invention is the same. In this case, the above-described branch pipe and valve are not required, and the piping structure is simplified.

The explanation of the action is in winter or when the outside air is high temperature,
In the other summer months or when the outside air is at a low temperature, the valve G of the supply header is closed, and the supply of the circulating cooling water to the heat exchanger 10 is stopped.

In particular, as an effect unique to the embodiment, a cylindrical discharge port 12 is provided at the lower edge corner of the heat exchanger 10 made of the hollow body as the discharge section, and a cylindrical supply port 11 is provided as the supply section. When formed at the upper edge corner of the heat exchanger 10, the heat exchanger 10 can be easily stacked in multiple stages according to the height of the filler (see FIG. 6).

Further, when the discharge portion 12 is formed by opening the lower end edge 21 of the heat exchanger 10 over the entire width, the discharge of the circulating coolant from the heat exchanger can be performed quickly and with a large area, and A cooling tower A in which C is loaded in the lower part of the heat exchanger 10
In this case, the circulating cooling liquid can be evenly applied from above to the entire area of the filler (see FIGS. 5 and 11).

[Brief description of the drawings]

1 is a front view of a first embodiment of this heat exchanger, FIG. 2 is a side view showing a state in which the heat exchangers of FIG. 1 are juxtaposed, and FIG. FIG. 4 is a partial front view showing an aspect of another supply unit, FIG. 4 is a plan view showing a state where the heat exchangers of FIG. 3 are arranged in parallel, and FIG. 5 shows another embodiment of the lower part of the heat exchanger. FIG. 6 is a partial front view, FIG. 6 is a schematic view of the cross-flow cooling tower, FIG. 7, FIG. 8, and FIG.
Sectional views along line 8-8 and line 9-9, and FIGS. 10 and 11
The figure is a schematic diagram of a cooling tower incorporating such a heat exchanger of the prior art. Main symbols in the figure 10: heat exchanger, 11: supply port, 12: discharge port, 23: meandering channel, 24: slowing down liquid part, 25: overflow channel, 60: Air vent hole.

Claims (8)

(57) [Claims] 1. A thin, thin hollow body as a whole, wherein the inside is a liquid flow-down passage, and a circulating cooling water supply part which is open to the outside is formed on the upper part of the hollow body, and a lower edge of the hollow body is provided. There is also provided a discharge part which is open to the outside at the lower end of the liquid flow-down passage, and most of the width of the liquid flow-down passage is a flowing-down liquid slowing portion, and the flowing-down liquid slowing portion extends in the horizontal direction. The long liquid blocking portion is formed by distributing a long blocking member in a hierarchical manner over a plurality of stages over the entire surface, shifting the position of each blocking member, and forming a meandering flow path between the blocking members. Is disposed adjacent to the vertical overflow channel via at least one vertical seal portion, and the upper end of the vertical seal portion is in the form of a weir, and the overflow channel and the downflow liquid are passed through the weir. The liquid reservoir at the top of the speed section An air vent hole is formed at the bent path position of the meandering descending liquid slow part, which is open to the overflow channel, while communicating with each other. A heat exchanger made of a synthetic resin for a cooling tower, wherein the raised portion is formed as a spacer. 2. The heat exchanger made of synthetic resin for a cooling tower according to claim 1, wherein said hollow body is a vacuum or blow molded product. 3. A heat exchanger made of synthetic resin for a cooling tower according to claim 1, wherein said overflow channel is provided along one side edge of said hollow body. 4. The synthetic resin heat exchanger for a cooling tower according to claim 1, wherein said overflow channel is provided along both side edges of said hollow body. 5. The method according to claim 1, wherein said bent downflow liquid slow portion is separated into two to four lines of fluid passages at a vertical section sealing portion at a central portion thereof. Heat exchanger made of synthetic resin for cooling towers. 6. The inner surface of the two wall plates constituting the slow flow portion of the falling liquid according to claim 1 has parallel ridges inclined upward and downward by approximately 45 degrees toward the downstream side over substantially the entire surfaces of the both walls. A heat exchanger made of synthetic resin for a cooling tower, characterized in that the heat exchanger is formed in a corrugated shape. 7. A heat exchanger made of a synthetic resin for a cooling tower according to claim 1 is arranged in parallel with a predetermined number of heat exchangers for cooling towers with a slight gap therebetween by fitting or contacting the raised portions. A narrow horizontal air flow passage is formed between the bodies to form an indirect heat exchanger for a cross-flow cooling tower, comprising a plate-like corrugated sheet provided facing the outside air intake of the cooling tower. On the secondary side of the filler, each air flow passage of the indirect heat exchanger is horizontal in the same direction as the air passage of the filler, its primary side is the filler side, and its secondary side is the cooling tower. A cross-flow cooling tower characterized in that the indirect heat exchanger is arranged over the entire width and height of the filler as the air chamber side from the exhaust port. 8. An upper edge of the hollow body is opened over the entire width, both wall plates of the upper edge project outward at the same height as the raised portion, and a central portion of the upper edge is concave U-shaped. Formed in a depression, the supply part is formed at the bottom of the depression,
2. The upper edge according to claim 1, wherein upper edges of adjacent heat exchangers are in close contact with each other at the time of assembly on an outer peripheral surface thereof to form a circulating cooling liquid reservoir extending in a longitudinal direction. Heat exchanger made of synthetic resin for cooling towers.