JP5381499B2 - Heat exchanger - Google Patents

Description

  The present invention relates to a heat exchanger disposed in a compressor or the like.

  In general, a compressor has a configuration in which external air is sucked in and compressed, and since the temperature rises when the air is compressed, a cooler heat exchanger for cooling the compressed air is provided.

  As shown in FIGS. 8 and 9, the heat exchanger includes a bundle 1 configured by combining tubes 1 a and plate fins 1 b, an inlet and an outlet in the bundle 1, and arranged on the upper and lower surfaces of the bundle 1. Seal baffle 2, first tube plate 3 located on one side of bundle 1, second tube plate 4 located on the other side of bundle 1, and first water chamber fixed to the outside of first tube plate 3 5, a second water chamber 6 fixed to the outside of the second tube plate 4, and a shell 7 that houses the bundle 1, the seal baffle 2, and the like inside.

  The seal baffle 2 includes an upper seal baffle 8 disposed on the upper surface of the bundle 1 and a lower seal baffle 9 disposed on the lower surface of the bundle 1, and the upper seal baffle 8 and the lower seal baffle 9 are The bundle 1 is fixed by a fixing member 10 such as a tie rod on the inlet side and the outlet side so as to sandwich the bundle 1 vertically. Further, an upper seal fixing portion 11 a is provided on the upper surface of the upper seal baffle 8, and a seal member 11 b such as stainless steel is disposed so as to seal between the upper inner surface of the shell 7. Further, a lower seal fixing portion 11c is provided on the lower surface of the lower seal baffle 9, and a seal member 11d is arranged so as to seal a gap with the lower inner surface of the shell 7. The seal baffle 2 is provided with a vertical plate first attachment portion 12a that can be attached to the first tube plate 3 on one end side, and is attached to the second tube plate 4 on the other end side of the seal baffle 2. A second mounting portion 12b of a vertical plate to be obtained is provided. Further, the upper seal fixing part 11 a and the lower seal fixing part 11 c are provided with an end side attaching part 13 of a horizontal plate that can be attached to the second water chamber 6.

  The first water chamber 5 includes an inlet / outlet port 5a through which cooling water flows in and out, so that the cooling water flows into the tube 1a and the cooling water is discharged from the tube 1a. The second water chamber 6 has a structure in which the cooling water is folded and allowed to flow to the tube 1a. Here, the first water chamber 5 may further include a structure for turning back the cooling water, and the cooling water may be reciprocated between the first water chamber 5 and the second water chamber 6.

  The shell 7 is provided with an air inlet (not shown) through which compressed air flows into the upper portion and an air outlet (not shown) through which compressed air that has passed through the bundle 1 flows out to the outside. .

  When the compressed air is cooled, the compressed air passes between the plate fins 1b and between the tubes 1a from the inlet side to the outlet side of the bundle 1, and cooling water passes through the tubes 1a. Further, the compressed air is cooled by contacting the surface of each plate fin 1b and the tube 1a. Also, the compressed air of the shell 7 flows downward from the air inlet, changes direction laterally in the lower part of the shell 7 and flows into the inlet of the bundle 1, and flows through the bundle 1 and is cooled. The direction of the outlet of the bundle 1 is changed from the lateral direction to the upward direction and flows upward, and flows out from the air outlet.

  In addition, as prior art document information relevant to this invention, the following patent document 1 etc. already exist, for example.

Japanese Patent Laid-Open No. 10-281589

  However, when a fluid such as compressed air flows through the bundle 1, the compressed air flowing inside the bundle 1 is biased depending on the structure such as the internal shape of the shell 7 that changes the direction of the fluid such as compressed air and other conditions. The bundle 1 has a problem that heat cannot be exchanged efficiently. In particular, in the case of the configuration of the conventional example as shown in FIG. 8, there is a problem that the fluid flowing in the bundle 1 flows biased to a portion far from the upper air inlet.

  In addition, when a fluid such as high-temperature compressed air is cooled, the water content of the fluid is condensed during the cooling to generate drain. Therefore, a part of the drain is discharged to the outside of the shell 7 together with the fluid and flows to the compressor. The compressor may be adversely affected. Furthermore, since the assembly of the seal baffle 2 and the like to the bundle 1 is complicated, there is a problem that the manufacturing cost is high.

  In view of such circumstances, the present invention intends to provide a heat exchanger that reduces the unevenness of the fluid and efficiently exchanges heat and appropriately separates the drain from the fluid.

The heat exchanger according to the present invention is configured by combining a tube and a fin and flows a fluid in a gap between the fins so that the fluid flows in one direction, and an inlet and an inlet to the bundle so that the fluid flows in the bundle. A seal baffle constituting an outlet and disposed on one side and the other side of the bundle, and a porous plate disposed on the outlet ;
The seal baffle disposed on one surface of the bundle is provided with a hole, and the hole of the seal baffle is configured to guide the direction of the fluid flowing out from the outlet of the bundle toward the one surface of the bundle .

The heat exchanger according to the present invention is configured by combining a tube and a fin and flows a fluid in a gap between the fins so that the fluid flows in one direction, and an inlet and an inlet to the bundle so that the fluid flows in the bundle. A seal baffle constituting an outlet and disposed on one side and the other side of the bundle, and a porous plate disposed on the outlet ;
The pores of the seal baffle are formed along the edge on the outlet side .

  Furthermore, in the heat exchanger of the present invention, it is preferable that the seal baffle and the porous plate are integrally formed.

  In the heat exchanger of the present invention, it is preferable that the seal baffle is provided with a drain hole through which a porous and separated drain flows.

  According to the heat exchanger of the present invention, even in the case of the structure and conditions such as the internal shape of the shell that changes the direction of the fluid when flowing the fluid through the bundle, a porous plate is disposed at the outlet of the bundle. The flow of fluid in the bundle can be made uniform to reduce the flow unevenness, and heat can be efficiently exchanged in the bundle. Further, even when the water content of the fluid is condensed during cooling, the drain is separated by the perforations of the plate, so that part of the drain together with the fluid can be prevented from being discharged to the outside of the shell. Furthermore, since the assembly of the seal baffle is facilitated by the configuration in which the porous plate is arranged at the outlet, it is possible to achieve an excellent effect that the manufacturing cost can be reduced.

It is a whole schematic block diagram which shows the heat exchanger of this invention. It is a schematic block diagram which shows the seal baffle and the porous plate of the heat exchanger of this invention. It is a conceptual diagram which shows a part of bundle of the heat exchanger of this invention. It is sectional drawing which shows the seal baffle and the porous plate of the heat exchanger of this invention. It is sectional drawing which expands and shows the connection part of a lower seal baffle and a porous plate. It is a top view which shows the seal baffle of the heat exchanger of this invention. It is a graph which shows the relationship between the air side heat transfer coefficient of this invention and a prior art example, and mass flow velocity. It is a whole schematic block diagram which shows the conventional heat exchanger. It is a front view which shows the entrance side of the conventional heat exchanger.

  Embodiments of the present invention will be described below with reference to the accompanying drawings.

  FIGS. 1-7 is an Example of this invention, In the figure, the part which attached | subjected the code | symbol same as FIG. 8 represents the same thing, The heat exchanger which is an embodiment is the tube 1a ( Bundle 21 configured by combining plate fins (fins) 1b (see FIG. 3), and the bundle 21 has an inlet and an outlet, and on the upper surface (one surface) and the lower surface (other surface) of the bundle 21. The seal baffle 22 to be arranged, the plate 24 of the porous 23 arranged at the outlet of the bundle 21, the first tube sheet 3 located on one side of the bundle 21, and the second tube sheet located on the other side of the bundle 21 4, a first water chamber 5 fixed to the outside of the first tube plate 3, a second water chamber 6 fixed to the outside of the second tube plate 4, a bundle 21, a seal baffle 22, and the like are housed inside. The shell 7 is provided.

  As shown in FIG. 3, the bundle 21 is arranged in parallel so that the plate fins 1b are stacked in the left-right direction to form an inlet side and an outlet side, and the tube 1a is inserted into a plurality of through holes formed in each plate fin 1b. Is arranged. The cooling water flows between the first water chamber 5 and the second water chamber 6 in the tube 1 a of the bundle 21, and fluid compressed air flows between the plate fins 1 b of the bundle 21. It flows from the entrance side to the exit side. Here, the configuration of the bundle 21 is not limited to the embodiment including the plate fins 1b and the tubes 1a, and may be other configurations as long as the compressed air is cooled by heat exchange.

  As shown in FIG. 4, the seal baffle 22 includes an upper seal baffle 25 disposed on the upper surface of the bundle 21 and a lower seal baffle 26 disposed on the lower surface of the bundle 21. The plate 24 is formed by bending a single plate having a large number of holes so as to be integrally formed. Further, the lower end of the plate 24 of the porous 23 and the tip of the lower seal baffle 26 are fixed by welding on the inlet side as shown in FIGS. Furthermore, the upper seal baffle 25 and the lower seal baffle 26 are fixed by a fixing member 27 such as a bracket on the inlet side. Here, if the upper seal baffle 25, the plate 24 of the porous 23, and the lower seal baffle 26 are integrally formed in a U-shape, they may all be configured by bending, or all may be fixed by welding. May be.

The upper seal baffle 25 of the seal baffle 22 has an upper surface side porous 28 along the outlet side edge 25a as shown in FIGS. 4 and 6, and the upper surface side porous 28 is compressed air. from bending position relative to the overall length L ₀ along the flow direction of 3% or more than 20% is constituted by a length L _1. Further, the porous portion 23 of the plate 24 is formed on the entire surface of the outlet with a hole of 5 mm or more and 10 mm or less, preferably 7 mm, and the upper surface side porous 28 is also formed of a hole of 5 mm or more and 10 mm or less, preferably 7 mm. . Here, the perforations 23 of the plate 24 and the perforations 28 on the upper surface side are preferably composed of holes of the punching plate, but may be composed of other means. Further, the shape of the hole may be a polygon such as a quadrangle or a triangle other than a circle.

  Further, the lower seal baffle 26 is provided with a plurality of drain holes 29 (three in FIG. 6) at predetermined intervals along the outlet side position as shown in FIGS. Here, the number and position of the drain holes 29 are not particularly limited as long as the drain holes 29 are located in the bundle 21 and can discharge the drainage by their own weight.

  Further, as shown in FIGS. 1 and 4, an upper seal fixing portion 30 is provided on the upper surface of the upper seal baffle 25 and a seal member 30 a such as stainless steel is disposed so as to seal between the upper inner surface of the shell 7. ing. Further, a lower seal fixing portion 31 is provided on the lower surface of the lower seal baffle 26 and a seal member (see reference numeral 11d in FIG. 9) is disposed so as to seal the gap with the lower inner surface of the shell 7. Further, a vertical plate first mounting portion 32 that can be attached to the first tube plate 3 is provided on one end side of the upper seal baffle 25 and one end side of the lower seal baffle 26, and the other end of the upper seal baffle 25. On the other end side of the side and lower seal baffles 26, a second mounting portion 33 of a vertical plate that can be attached to the second tube plate 4 is provided. Further, the upper seal fixing portion 30 and the lower seal fixing portion 31 are provided with end portions 34 and 35 of horizontal plates that can be attached to the second water chamber 6.

  The shell 7 includes an air inlet (not shown) through which compressed air flows into the shell 7 and an air outlet (not shown) through which compressed air that has passed through the bundle 21 flows out. .

  The operation of the embodiment for carrying out the present invention will be described below.

  When the compressed air is cooled, the compressed air passes between the plate fins 1b and between the tubes 1a from the inlet side to the outlet side of the bundle 1, and cooling water passes through the tubes 1a. Further, the compressed air is cooled by contacting the surface of each plate fin 1b and the tube 1a.

  Further, the compressed air in the shell 7 flows downward from the air inlet, changes its direction in the lateral direction at the lower part of the shell 7 and flows into the inlet of the bundle 21, and laterally (one direction) in the bundle 21. The plate 24 is cooled and then flows upward from the perforations 23 of the plate 24 and the perforations 28 on the upper surface side in a lateral direction and obliquely upward to an upward direction (a direction substantially perpendicular to the surface of the upper seal baffle 25). It flows out from the air outlet.

  At the same time, the compressed air equalizes the flow of the compressed air in the bundle 21 by the perforations 23 of the plate 24 and the perforations 28 on the upper surface side, thereby reducing the unevenness of the flow. Further, the drain contained in the compressed air is separated when the compressed air passes through the perforations 23 and the upper surface side perforations 28 of the plate 24, and is discharged to the outside through the drain holes 29 by its own weight.

  Here, when the heat exchanger of the embodiment of the present invention and the heat exchanger of the conventional example are actually compared by the air side heat transfer coefficient-mass flow velocity, as shown in FIG. 7, the heat exchange of the embodiment of the present invention is performed. It is clear that the performance is improved by 5 to 8% in comparison with the conventional heat exchanger, and as a result, the deviation of the flow of compressed air is reduced and the efficiency of heat exchange is high.

  Thus, according to the embodiment as described above, even when the shell 21 has a structure such as the internal shape of the shell 7 that changes the direction of the compressed air when flowing the compressed air through the bundle 21 or other conditions, Since the porous plate 24 is disposed at the outlet of the bundle 21, the flow of compressed air in the bundle 21 is made uniform to reduce the unevenness of the flow, and the bundle 21 can efficiently exchange heat. Further, when the perforations 23 of the plate 24 are holes of 5 mm or more and 10 mm or less and are arranged on the entire surface of the outlet, the flow of the fluid in the bundle 21 is appropriately uniformed to further reduce the unevenness of the flow. Heat can be exchanged efficiently. Here, when the perforations 23 of the plate 24 are holes larger than 10 mm and are arranged on the entire surface of the outlet, there is a problem that the uneven flow of the compressed air cannot be sufficiently eliminated. Further, when the perforations 23 of the plate 24 are holes of less than 5 mm and are arranged on the entire surface of the outlet, there is a problem that the flow of compressed air is obstructed.

  Even when the hot compressed air is cooled to generate drainage due to condensation of moisture, the drain is separated by the perforations 23 of the plate 24, so that part of the drain is discharged to the outside of the shell 7 together with the compressed air. And thus adverse effects on the compressor can be eliminated. Furthermore, since the porous plate 24 is arranged at the outlet of the bundle 21, the drain can flow down inside the bundle 21 and the drain can be easily treated as compared with the case where the porous plate is arranged at the inlet of the bundle 21. .

  Furthermore, since the assembly of the seal baffle 22 is facilitated by the configuration in which the plate 24 of the porous 23 is disposed at the outlet, the manufacturing cost can be reduced.

  In the embodiment, the upper seal baffle 25 disposed on one surface of the handle 21 is provided with a porous 28, and the porous 28 of the upper seal baffle 25 guides compressed air flowing out from the outlet of the bundle 21 to one surface of the bundle 21. When configured to do so, the flow of fluid in the bundle 21 can be appropriately uniformed by the perforations 28 of the upper seal baffle 25 to further reduce the unevenness of the flow, and the bundle 21 can efficiently and efficiently exchange heat. it can.

In the embodiment, when the porous 28 of the upper seal baffle 25 is formed along the edge 25a on the outlet side, the flow of the fluid in the bundle 21 is appropriately controlled by the porous 23 of the plate 24 and the porous 28 of the upper surface side. The bundle 21 can further reduce the uneven flow, and the bundle 21 can efficiently and efficiently exchange heat. The porous 28 of the upper surface side, and consists of the compressed air from the bending position with respect to the total length along the flow direction of 3% or more than 30% the length L _1, suitably a flow of fluid in the bundle 21 The bundle can be made uniform to further reduce the flow unevenness, and the bundle 21 can optimally and efficiently exchange heat. Here, when the structure of the porous 28 on the upper surface side is made larger than 30% from the bent position with respect to the total length L ₀ , the compressed air does not sufficiently flow in the bundle 21, and the efficiency of heat exchange can be improved. There is a problem that you can not. Further, when the configuration of the upper surface side porous 28 is less than 3% from the bent position with respect to the total length L ₀ , the effect of the upper surface side porous 28 cannot be obtained, and the efficiency of heat exchange is increased. There is a problem that can not be.

  In the embodiment, when the seal baffle 22 and the porous plate 24 are integrally formed, fixing members such as tie rods and bolts are unnecessary, the number of parts can be reduced, and the manufacturing cost can be reduced. Further, when the upper seal baffle 25, the plate 24 of the porous 23, and the lower seal baffle 26 are integrally formed in a U-shape, the assembly of the seal baffle 22 and the bundle 21 becomes extremely easy, thereby further reducing the manufacturing cost. be able to.

  In the embodiment, if the lower seal baffle 26 is provided with a drain hole 29 through which the drain separated by the perforation 23 of the plate 24 and the perforation 28 on the upper surface side is drained, the drain is appropriately discharged from the inside of the bundle 21. It is possible to prevent a part of the drain together with the air from being discharged to the outside of the shell 7, and thus it is possible to suitably eliminate the adverse effect on the compressor.

  Note that the heat exchanger of the present invention is not limited to the above illustrated example, and may be applied to a compressor by arranging a plurality of coolers, and applied to other uses and configurations other than the compressor. Of course, various modifications may be made without departing from the scope of the present invention.

1a Tube 1b Plate fin (fin)
3 First tube plate 4 Second tube plate 5 First water chamber 6 Second water chamber 7 Shell 21 Bundle 22 Seal baffle 23 Porous 24 Plate 25a Edge 28 Porous 29 Drain hole

Claims (4)

A bundle configured by combining a tube and a fin and flowing a fluid in a gap between the fins to flow the fluid in one direction; and an inlet and an outlet are configured in the bundle so that the fluid flows in the bundle; A seal baffle disposed on one surface and the other surface, and a porous plate disposed on the outlet ,
The seal baffle disposed on one surface of the bundle is provided with a hole, and the hole of the seal baffle is configured to guide the direction of the fluid flowing out from the outlet of the bundle toward the one surface of the bundle. Heat exchanger. A bundle configured by combining a tube and a fin and flowing a fluid in a gap between the fins to flow the fluid in one direction; and an inlet and an outlet are configured in the bundle so that the fluid flows in the bundle; A seal baffle disposed on one surface and the other surface, and a porous plate disposed on the outlet ,
The heat exchanger according to claim 1, wherein the seal baffle is formed along the edge on the outlet side . The heat exchanger according to claim 1 or 2 , wherein the seal baffle and the porous plate are integrally formed. The heat exchanger according to any one of claims 1 to 3, wherein the seal baffle is provided with a drain hole through which drained and separated drain flows.

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