JP2005351610A - Water cooling method, and evaporation cooling type closed or open tube heat exchanger to be used for water cooler and water cooler equipped therewith - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve heat exchanging efficiency and reduce cost while uniformly and reliably carrying spray water onto the surfaces of heat exchange tubes by vertically arranging the meandering face of a tube heat exchanger and vertically setting a water film sheet over heat exchanger tube portions arranged in approximate parallel for guiding the spray water. <P>SOLUTION: Approximately horizontal straight tube portions 13 of the meandering tubes 12 constituting the closed tube heat exchanger 11 to be used for a cross flow type water cooling tower 10 are formed in approximate parallel to each other. The plurality of meandering tubes 12 are arranged at spaces in the cross direction of an outside air intake 14 in the state that the meandering face is located in an approximately vertical plane. The water film sheet 15 is set over the upper and lower straight tube portions 13 of the tube heat exchanger 11. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a water cooling method, an evaporative cooling type sealed tube heat exchanger used in the water cooler, and a water cooler including the sealed open tube heat exchanger.

Conventionally, in this type of hermetic heat exchanger, the meandering pipes are formed in parallel with each other with straight portions that are successively connected with a U-shaped bent portion.
Therefore, when the surface including the meandering pipe is installed in the horizontal direction, the height of the entrance and exit of the meandering pipe is slightly different so that the drainage in the pipe can be easily performed (for example, Patent Document 1).
Further, between the straight pipe portions of the upper and lower meandering pipes, corrugated plates made of synthetic resin are filled perpendicularly in parallel with the plurality of straight pipe portions.

However, the sprayed water sprayed toward the synthetic resin filling plates (corrugated plates) loaded in the individual straight pipe portions has a mismatch between the positions of the upper and lower filling plates and the wall surface of the lower filling plate. Passing downward without touching, or contacting only one side of the filling plate, the effective area of the wet wall area as a whole decreases, and it falls without contact with the outside air sufficiently. Therefore, the heat exchange function is not fully exhibited.
In addition, as described above, even if the sprayed water flows down along the surface of the filling plate, it is not always supplied to the surface portion of each straight pipe portion, and flows down only through the filling plate portion. There was a lot of sprayed water, and the sprayed water whose temperature was lowered by the latent heat of corner vaporization tended to not act on the straight pipe part effectively.
In addition, when draining water to prevent freezing in winter, if the meandering surface is installed horizontally, there is a slight difference in the height of the entrance and exit of the meandering pipe, so that the drainage in this pipe can be performed easily. However, the drainage gradient of the straight pipe part is not sufficient, and the possibility of a freezing puncture accident is denied because drainage cannot be completed completely due to the influence of installation level, installation accuracy, deformation, dirt, etc. Can not.
No. 6-4217

The main object of the present invention is to reduce the passage resistance of the air passing through the heat exchanger, to reduce the blowing power, and to reduce the noise.
Another object of the present invention is to disperse the pipe heat exchanger by vertically arranging a meandering surface of the pipe heat exchanger, and by vertically spreading a packed film for guiding the sprayed water on the heat exchanger pipe parts arranged in parallel. It is possible to flow water uniformly and reliably on the surface of the heat exchanger tube, to improve heat exchange efficiency and to reduce costs.
A further object of the present invention is to make a part of the filling membrane a water-impermeable sheet so that an air heat exchanging portion that does not come into contact with the spray water can be easily formed, and a function for preventing the generation of white smoke can be easily added. Is to be able to.
It is a further object of the present invention to ensure that drainage in the heat exchanger tubes is possible.

  In the invention that solves the above-mentioned problems sufficiently and sufficiently, the substantially horizontal straight pipe portions of the meandering pipe constituting the sealed pipe heat exchanger are formed substantially parallel to each other, and the meandering pipe has a meandering surface substantially vertical. Sealed in a state where a plurality of pipes are arranged in the plane, spaced apart in the width direction of the outside air intake, and the sprayed water guide sheets are stretched over the straight pipe sections at the top and bottom of each heat exchanger. Sprinkling water is sprayed on the mold tube heat exchanger, and the sprayed water flows along the spray water guide sheet. During this flow, the sprayed water is cooled by direct contact with the external airflow, and further cooled by the latent heat action accompanying evaporation. Then, the cooled sprayed water is guided by the sprayed water guide sheet over the entire area of the straight pipe portion, and the circulating cooling water circulating and flowing through the sealed pipe heat exchanger is indirectly cooled. It is a water cooling method characterized by making it occur.

  A related invention that solves the above-mentioned problem sufficiently spreads sprayed water on an open heat exchanger in which sprinkling guide sheets are continuously stretched over support members arranged in parallel in the vertical direction. The water cooling method is characterized in that the water flows along a guide sheet, directly contacts an external air flow during the flow, and cools the spray water.

A related invention that solves the above-mentioned problem sufficiently and sufficiently is a sealed pipe heat exchanger used in a water cooler,
The straight horizontal pipe portions of the meandering pipe constituting the pipe heat exchanger are formed substantially in parallel with each other, and the meandering pipe has a plurality of outside air, with the meandering surface positioned in a substantially vertical plane. The heat exchangers are arranged at intervals in the width direction of the intake port, and the sprayed water guide sheets are stretched over the upper and lower straight pipe portions of each heat exchanger. It is a sealed tube heat exchanger.

A related invention that solves the above-mentioned problem sufficiently and sufficiently is a sealed pipe heat exchanger used in a water cooler,
In the pipe heat exchanger, the meandering pipes, which are successively connected by U-shaped bent parts, are formed substantially parallel to each other, and a plurality of the outside air is provided with the meandering surfaces positioned in the vertical plane. The heat exchangers are arranged at intervals in the width direction of the intake port, and a water film sheet forming a cooling water flow path is provided on at least one side of the heat exchanger. The tube heat exchanger is characterized in that it is arranged attached to or attached in a row in the vertical direction.

  A related invention that solves the above-mentioned problems sufficiently is an open type heat exchanger used for a water cooler, in which support members are arranged vertically in parallel, and the sprayed water guide sheets are respectively connected in the vertical direction across the support members. It is an open type heat exchanger characterized by being stretched around.

In a related invention that is an invention that solves the above-mentioned problem sufficiently and sufficiently, the hermetic tube heat exchanger according to the invention of claim 3, 4, 5, 6, 7 or 8 is loaded in the machine frame. As a water cooler characterized by
A related invention, which is an invention that solves the above-mentioned problem sufficiently and sufficiently, is a water cooler characterized in that the open-type pipe heat exchanger according to the invention of claim 10 is loaded in the machine frame.

In the cooling method according to the first aspect of the present invention, the substantially horizontal straight pipe portions of the meandering pipe constituting the sealed pipe heat exchanger are formed substantially parallel to each other, and the meandering pipe has a meandering surface substantially omitted. In a state where they are positioned in the vertical plane, a plurality of them are arranged at intervals in the width direction of the outside air intake port, and the sprayed water guide sheets are stretched over the upper and lower straight pipe portions in each heat exchanger. Sprinkling water is sprayed on the sealed tube heat exchanger, and the sprayed water flows along the sprayed water guide sheet. During this flow, the sprayed water is cooled by direct contact with the external airflow. The cooled sprayed water is cooled and guided by the sprayed water guide sheet over the entire area of the straight pipe section, and the circulating cooling water circulating and flowing down in the sealed pipe heat exchanger is indirectly collected. By cooling, the above problems, especially the spray water, It can flow uniformly and surely on the pipe surface, and almost all of the sewage flows in contact with the outer peripheral surface of the straight pipe part and flows down sequentially, improving the heat exchange efficiency and reducing the cost.
In invention of Claim 2, spread water is spread | dispersed on the open-type heat exchanger with which a sprinkling guide sheet | seat is continuously stretched around the support member arrange | positioned in the up-down parallel, respectively, and is spread, By flowing along this watering guide sheet, directly contacting the external airflow during this flow, and cooling the spray water, the resistance of the air passing through the open heat exchanger can be reduced, and the blowing power can be reduced.

  In the sealed pipe heat exchanger according to any one of claims 3 to 9, the arrangement of the pipe heat exchanger meandering surface is vertical, and the spray water is guided to the heat exchanger pipes arranged substantially in parallel. By spreading the sprayed water guide sheet or the water film sheet filling membrane in the vertical direction, the sprayed water can be made to flow evenly and reliably over the surface of the heat exchanger tube, and almost all the sewage is straight. It is possible to improve the heat exchange efficiency and reduce the cost by sequentially flowing down in contact with the outer peripheral surface of the part.

Furthermore, the passage resistance of the air passing through the heat exchanger can be reduced, the blowing power can be reduced, and the noise can be reduced. In addition to this, by arranging the pipe heat exchanger meander surface vertically and arranging the heat exchanger pipe parts in parallel, drainage in the heat exchanger pipe can be ensured, and in the heat exchanger pipe in winter Damage to the heat exchanger tube due to freezing of the remaining circulating cooling water can be prevented.
Furthermore, in the invention according to claim 5, in addition to the above-mentioned effect, the water film sheets are arranged in a zigzag manner and sequentially bent between the upper and lower straight pipe portions in each of the pipe heat exchangers. The width of the water film sheet is generally the length dimension of the straight pipe part in each of the tube heat exchangers, and the upper end of the water film sheet is a square shape as the spray water receiving part at the uppermost straight pipe part position. The lower end of the water film sheet protrudes downward from the lowest straight pipe part and serves as a spray water guide to the lower water tank, so that the spray water is stably received at the upper end of the water film sheet. The sprayed water can flow uniformly over the entire water film sheet. Furthermore, the spray water flowing down the entire surface of the water film sheet can be collected by flowing the spray water into the sewage tank by the spray water guide at the lower end of the water film sheet.
In particular, in the invention described in claim 7, by forming a part of the filling film as a water-impermeable sheet, an air heat exchanging portion that does not come into contact with the spray water can be easily made, and the function of preventing the generation of white smoke can be achieved. Can be attached easily.
In the invention described in claim 10, the water cooling method described in claim 2 can be implemented.

In the water cooler which is invention of Claim 11 thru | or 13, circulating cooling water can be cooled, exhibiting the effect of the said closed tube heat exchanger.
In particular, in the water cooler according to the twelfth aspect of the present invention, the spray water flowing down the entire surface of the water film sheet is caused to flow into the sewage tank by the spray water guide portion at the lower end of the water film sheet. Can be collected.
In the invention described in claim 14, the water cooling method described in claim 2 can be carried out.

Embodiment 1
This embodiment shows typical embodiments of the inventions of claims 4, 5, 6 and claims 11, 12.

  In FIG. 1, reference numeral 10 denotes a cross-flow type water cooling tower, which is the same as a known one except for the structural arrangement of the internal heat exchanger, and the description thereof is omitted here.

The substantially horizontal straight pipe portions 13 of the meandering pipe 12 constituting the sealed pipe heat exchanger 11 used in the crossflow type water cooling tower 10 are formed substantially parallel to each other, and the meandering pipe 12 Are arranged in the width direction of the outside air inlet 14 at intervals with the meandering surface positioned in a substantially vertical plane.
Over the upper and lower straight pipe sections 13 in each of the heat exchangers 11, a water film sheet 15 forming a cooling water flow path is attached to or attached to the meandering surface of the heat exchanger 11 (see FIG. 3). ). More specifically, the water film sheet 15 is stretched over the upper and lower straight pipe portions 13 in each of the heat exchangers 11.
The one water film sheet 15 is arranged in a zigzag manner between the upper and lower straight pipe portions 13 in each of the tube heat exchangers 11, and the width of the water film sheet 15 is approximately the width of each of the tube heat exchangers. 11, the upper end of the water film sheet 15 protrudes upward from the uppermost straight pipe portion 13 and is attached to the machine frame near the watering device or the watering nozzle. The water film sheet 15 is bent downwardly as a receiving part, and the lower end of the water film sheet 15 protrudes downward from the lowermost straight pipe part. It is bent.
The water film sheet 15 is a water-permeable sheet such as a knitted fabric, a non-woven fabric, or a net.
The water film sheet 15 may be formed of a bag-like material, and may be covered with the sealed tube heat exchanger 11 corresponding to the bag-like material and stopped with a stopper.
In these water-permeable sheets, the spray water once contacted with them sufficiently wets these sheets by capillary action, and due to the wide surface area, the contact area with the external airflow is large, and sufficient vaporization is achieved. The flowing water is cooled by the latent heat, and the water that has once contacted does not separate from the sheets, but reliably reaches the outer peripheral surface of each straight pipe portion 13 in order, cools them, and in each straight pipe portion 13 The circulating cooling water flowing through is indirectly cooled (corresponding to a representative embodiment of the invention described in claim 1).

Embodiment 2
This embodiment shows a typical embodiment of the invention described in claim 3 and the invention described in claims 11 and 12. A different configuration from the first embodiment is that a sprayed water guide sheet is stretched over the upper and lower straight pipe sections 13 in each of the heat exchangers 11. The sprayed water guide sheet is not limited to water permeability like the water film sheet 15, and may be a perforated plate in which a large number of holes are formed in a synthetic resin plate made of vinyl chloride.

Embodiment 3
This embodiment shows a typical embodiment of the invention described in claim 7 and the invention described in claims 11 and 12. The configuration different from that of the first embodiment is that the sealed tube heat exchanger 11 is formed on both sides of the heat exchanger 11 by a synthetic resin made of a synthetic resin instead of the water film sheet 15 (not shown). ) In parallel with the heat exchanger 11 and arranged as a non-contact outdoor air passage that is not in contact with the spray water, so that the spray water is not sprayed on this portion, and is a sealed pipe having a white smoke prevention function It is to be a heat exchanger.

Embodiment 4
This embodiment is an example of the embodiment described in claims 11 and 12, and the configuration different from the embodiment 1 is not a cross flow type water cooling tower but a counter flow type cooling tower. Further, the lower end of the water film sheet 15 protrudes downward from the lowest straight pipe portion 13 and is not bent into a dogleg shape.

Embodiment 5
This embodiment is an example of a typical embodiment of the invention described in claim 8, and a configuration different from that of the first embodiment is that the hermetic tube heat exchanger is a spiral coil 16 and is arranged between upper and lower coil portions. The water film sheets 15 are attached to or attached to the straight pipe portions 13 located on both sides of the spiral coil 16 of this heat exchanger in the vertical direction, and a total of two sheets are arranged (FIGS. 4 and 5). And FIG. 6).
The spiral coils 16 may be arranged at intervals in the width direction of the outside air intake port 14, and the adjacent spiral coils 16 may be arranged so as to turn in opposite directions (see FIG. 7, claim 7). Corresponding to a typical embodiment). The water film sheet 15 is bent at the upper part of the spiral coil 16 and is folded in two, and the water film sheet 15 is inclined and stretched at the uppermost stage, and the sprayed water from the watering device is supplied. A water spray receiving portion 17 is formed. As the water spray receiving portion 17, a baffle plate which is a member different from the water film sheet 15 may be provided in the straight pipe portion 13 at the uppermost stage of each coil.
In this embodiment, the curved portion of the spiral coil 16 is inclined at an angle with respect to the vertical surface, so that the circulating cooling water is heated by the heat of the curved portion located in the vertical surface of the first embodiment. Compared to the exchanger, it takes time to flow down while moving back and forth in the air flow direction, and the contact time with the spray water and the external airflow can be extended.
Further, since the adjacent spiral coils 16 are pivoted in directions opposite to each other, the water sprinkling portion 17 can be secured between the adjacent spiral coils 16.
Further, the water film sheet 15 bent in a U-shape makes the air passage close to a honeycomb shape, and the outside air has an effect of flowing in a laminar flow in the horizontal direction.
Embodiment 6
This embodiment is a typical embodiment of the invention according to claim 10 and the invention according to claim 14, and the open type heat exchanger used for the water cooler has a bar-like support member 16A in the vertical direction. Arranged in the depth direction from the outside air inlet 14, the spray water guide sheet 15 is connected and stretched in a substantially vertical direction over the entire length of the support member 16 </ b> A. This open pipe heat exchanger is loaded in the frame of the water cooler (see FIG. 8).
The middle portion of each spray water guide sheet 15 is stretched in a zigzag manner with respect to several horizontal middle support rods 13a so that they do not vibrate due to ventilation (see FIG. 8).
The action is to spread the sprayed water on the open heat exchanger in which the watering guide sheets 15 are continuously stretched over the support members 16A arranged in parallel in the vertical direction, and to flow the sprayed water along the watering guide sheets 15. During this flow, the sprayed water is cooled by direct contact with the external airflow (corresponding to a typical embodiment of the invention described in claim 2).
Since the middle part of the spray water guide sheet 15 is in contact with the middle support bar 13a and stretched, it is not blown or vibrated by contact with the external airflow to generate noise.

FIG. 3 is a partially omitted schematic front view of the first embodiment. FIG. 2 is a partially omitted schematic right side view of FIG. FIG. 2 is a perspective view of main parts in FIG. FIG. 10 is a perspective view of main parts of a fifth embodiment. FIG. 5 is a perspective view showing a spiral coil in FIG. FIG. 5 is a partially omitted front view showing the arrangement of the spiral coils of FIG. FIG. 7 is a partially omitted front view showing an arrangement of spiral coils different from that of FIG. 6. FIG. 10 is a schematic diagram of a sixth embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Cross flow type water cooling tower 11 Tube heat exchanger 13 Straight pipe part 15 Water film sheet

Claims (14)

  The substantially horizontal straight pipe portions of the meandering pipe constituting the hermetic tube heat exchanger are formed substantially parallel to each other, and the meandering pipe has a plurality of meandering faces positioned in a substantially vertical plane, Sprinkling water is spread on a sealed tube heat exchanger that is arranged at intervals in the width direction of the outside air intake and over which the sprinkling water guide sheets are stretched across the upper and lower straight pipe sections of each heat exchanger. The sprayed water is allowed to flow along the sprayed water guide sheet, and the sprayed water is cooled by direct contact with the external airflow during the flow, and further cooled by the latent heat action caused by evaporation. A water cooling method characterized by causing the sprayed water guide sheet to guide and flow down almost all over the tube portion, and indirectly cooling the circulating cooling water circulating and flowing through the sealed pipe heat exchanger.   Sprinkling water is spread on an open heat exchanger in which sprinkling guide sheets are stretched in a vertical plane over support members arranged in parallel vertically, and the sprinkling water flows along this sprinkling guide sheet. A water cooling method, wherein the sprayed water is cooled by bringing it into direct contact with an external air flow during the flow down. In closed tube heat exchangers used for water coolers,
The straight horizontal pipe portions of the meandering pipe constituting the pipe heat exchanger are formed substantially in parallel with each other, and the meandering pipe has a plurality of outside air, with the meandering surface positioned in a substantially vertical plane. The heat exchangers are arranged at intervals in the width direction of the intake port, and the sprayed water guide sheets are stretched over the upper and lower straight pipe portions of each heat exchanger. Sealed tube heat exchanger. In closed tube heat exchangers used for water coolers,
In the pipe heat exchanger, the meandering pipes, which are successively connected by U-shaped bent parts, are formed substantially parallel to each other, and a plurality of the outside air is provided with the meandering surfaces positioned in the vertical plane. The heat exchangers are arranged at intervals in the width direction of the intake port, and a water film sheet forming a cooling water flow path is provided on at least one side of the heat exchanger. The tube heat exchanger is characterized in that the tube heat exchanger is arranged so as to be attached or attached in a row in the vertical direction.   Each tube heat exchanger is sequentially hooked and bent between the upper and lower straight pipe portions, and each of the at least one water film sheet is arranged, and the width of the water film sheet is approximately the tube heat exchange. The upper end of the water film sheet is bent in a square shape as the spray water receiving part at the position of the uppermost straight pipe part, and the lower end of the water film sheet is the lowest. The said pipe | tube heat exchanger of Claim 4 which protrudes below from the straight pipe part of this, and is used as the spray water guide part to a lower water tank.   6. The hermetic tube heat exchanger according to claim 4, wherein the water film sheet is a water permeable sheet such as a knitted fabric, a nonwoven fabric, or a net.   The sealed tube heat exchanger is arranged on both sides of the heat exchanger with a synthetic resin instead of the water membrane sheet and a water impermeable filling membrane arranged substantially vertically in parallel with the heat exchanger, The sealed pipe heat exchanger having a white smoke prevention function according to claim 4, 5 or 6, wherein the sprayed water is not sprayed on this portion as an outside air passage that is not in contact with the sprayed water.   The sealed tube heat exchanger is a spiral coil having the straight tube portion, and the water film sheet is arranged in series in a vertical direction along both sides of the spiral coil. The closed tube heat exchanger according to 4, 5, 6 or 7.   9. The hermetic tube heat exchanger according to claim 8, wherein the spiral coils are arranged at intervals in the width direction of the outside air intake, and the adjacent spiral coils are turned in opposite directions.   In an open heat exchanger used for a water cooler, support members are arranged in parallel in the vertical direction, and the sprayed water guide sheets are stretched around each of the support members in a vertical plane direction. Open heat exchanger.   A water cooler, wherein the sealed pipe heat exchanger according to the invention of claim 3, 4, 5, 6, 7, 8, or 9 is loaded in the machine frame.   In the invention according to claim 3, 4, 5, 6, 7, 8 or 9, each straight pipe portion in the meandering sealed pipe heat exchanger is parallel to the external airflow. A water spray device is provided as an exchange tower and sprays spray water to the water film sheet and the sealed tube heat exchanger, and is disposed above the sealed tube heat exchanger. The water cooler according to claim 11, wherein the water cooler protrudes downward near the pipe and is bent in a U shape as a spray water guide to the lower water tank.   Each straight pipe part in the invention according to claim 3, 4, 5, 6, 7, 8, or 9 is a counter flow type heat exchange tower orthogonal to an external air flow, and the water film sheet and the hermetic seal The water cooler according to claim 11, wherein a water spraying device for spraying sprayed water to the mold tube heat exchanger is disposed above the sealed tube heat exchanger.   The water cooler, wherein the open-type pipe heat exchanger according to claim 10 is loaded in the machine frame.

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