JP5333048B2 - 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. 10 and 11, 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. 10, there is a problem that the fluid flowing in the bundle 1 flows biased to a portion far from the upper air inlet.

  In view of such circumstances, the present invention seeks to provide a heat exchanger that reduces the unevenness of fluid and efficiently exchanges heat.

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 heat exchanger comprising an outlet and a seal baffle disposed on one side and the other side of the bundle,
A fluid opening part is provided on the outlet side of the seal baffle, and the opening part is configured to guide the direction of the fluid flowing out from the outlet of the bundle to one surface side of the bundle.

  Further, in the heat exchanger of the present invention, a fluid opening portion is provided on the inlet side of the seal baffle, and the opening portion changes the direction of the fluid flowing into the inlet of the bundle from the one surface side of the bundle. It is preferable to be configured to guide between a seal baffle disposed on one side of the bundle and a seal baffle disposed on the other side of the bundle.

  Furthermore, in the heat exchanger of this invention, it is preferable that the open part of the said seal baffle is formed along an edge.

  Furthermore, in the heat exchanger of the present invention, it is preferable that the opening portion of the seal baffle is constituted by a notch or / and an opening.

  The heat exchanger according to the present invention further includes a shell that houses the bundle and the seal baffle and has a fluid inlet disposed upward, the fluid inlet being on the inlet side of the seal baffle and the inlet of the bundle as viewed from above. It is preferable that the opening portion disposed on the one side in the extending direction and disposed on the inlet side of the seal baffle is provided on the other side in the inlet extending direction of the bundle.

  Furthermore, in the heat exchanger of this invention, it is preferable to provide a porous plate at a position closer to one side of the inlet of the bundle.

  According to the heat exchanger of the present invention, the opening portion of the fluid is provided on the outlet side of the seal baffle, and the opening portion guides the direction of the fluid flowing out from the outlet of the bundle to the one surface side of the bundle. It is possible to reduce the unevenness of the flow and to achieve an excellent effect that heat can be efficiently exchanged with the bundle.

It is a whole schematic block diagram which shows an example of the heat exchanger of this invention. It is a top view which shows the inside of an example 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 a top view which shows the seal baffle of an example of the heat exchanger of this invention. It is a side view which shows the seal baffle of an example of the heat exchanger of this invention. It is a whole schematic block diagram which shows the other example of the heat exchanger of this invention. It is a top view which shows the seal baffle of the other example of the heat exchanger of this invention. It is a whole schematic block diagram which shows another example of the heat exchanger of this invention. It is a top view which shows the inside of another example of the heat exchanger of this invention. 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.

  1 to 5 show an embodiment of the present invention. In the figure, the same reference numerals as those in FIG. 10 denote the same parts, and the heat exchanger of the embodiment is a tube. Bundle 21 configured by combining 1a (see FIG. 3) and plate fin (fin) 1b (see FIG. 3), and an upper surface (one surface) and a lower surface (other surface) of bundle 21 that form an inlet and an outlet in bundle 21 ), The first tube plate 3 located on one side of the bundle 21, the second tube plate 4 located on the other side of the bundle 21, and the outside of the first tube plate 3. A first water chamber 5, a second water chamber 6 fixed to the outside of the second tube plate 4, and a shell 23 for storing the bundle 21, the seal baffle 22, and the like therein.

  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 FIGS. 1 and 2, the shell 23 is provided with an air inlet 24 (see FIG. 2) of a fluid inlet through which compressed air flows into the upper portion, and the compressed air that has passed through the bundle 21 flows out to the outside. An air outlet (not shown) for fluid outlet is provided. Here, the air inlet 24 is arranged in a range from the inlet side of the seal baffle 22 to the center position of the seal baffle 22 in the flow direction of the compressed air of the bundle 21 as viewed from above, and the inlet extension of the bundle 21 is also shown. In the present direction (direction perpendicular to the flow direction of the compressed air of the bundle 21), it is arranged in a range of a position closer to one side from the center of the inlet of the bundle 21 (a range of the left position in FIG. 2).

  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 upper seal baffle 25 and the lower seal baffle 26 are respectively provided with mounting holes 27 (see FIG. 4) in the central portions 25a, 26a on the inlet side (inlet extending direction) and the central portion 25b on the outlet side (exit extending direction). And the inlet side of the upper seal baffle 25 and the inlet side of the lower seal baffle 26 are fixed by the first fixing member 28 such as the mounting hole 27 and the bracket, and the outlet side of the upper seal baffle 25 and The outlet side of the lower seal baffle 26 is fixed by a mounting hole 27 and a second fixing member 29 such as a bracket.

The upper seal baffle 25 of the seal baffle 22 is formed with an open portion 30 along the edge portion 25c on the outlet side (exit side extending direction) so as to leave the central portion 25b on the outlet side. The open portion 30 is formed as a notch with a length L ₁ of 3% or more and 30% or less from the tip with respect to the total length L ₀ along the flow direction of the compressed air of the bundle 21. Here, the center portion 25b is not particularly limited in size and shape as long as the upper seal baffle 25 is fixed and durable, but is configured in a small range so as not to inhibit the flow of compressed air. It is preferable. In other examples shown in FIGS. 6 and 7, the opening 30a on the outlet side of the upper seal baffle 25 may be formed with an opening having a predetermined area.

Further, the upper seal baffle 25 has an open portion 31 on the other side (right side in FIG. 2) from the central portion 25a of the inlet of the bundle 21 along the edge portion 25d on the inlet side (inlet extending direction) of the bundle 21. There are formed, the opening portion 31 of the inlet side, as notch is formed from the tip with respect to the total length L ₀ along the flow direction of the compressed air of the bundle 21 at 3% or more than 10% of the length L ₂ ing. In another example shown in FIGS. 8 and 9, a porous plate 32 such as a punching plate may be provided at the entrance of the bundle 21. The porous plate 32 is fixed to the inlet end portion of the upper seal baffle 25 and the inlet end portion of the lower seal baffle 26, and is disposed closer to one side from the center of the inlet of the bundle 21 (left side in FIG. 9). It is preferred that

  Further, as shown in FIGS. 1 to 5, an upper seal fixing portion 33 is provided on the upper surface of the upper seal baffle 25 and a seal member 33 a such as stainless steel is disposed so as to seal between the upper inner surface of the shell 23. ing. Further, a lower seal fixing portion (not shown) is provided on the lower surface of the lower seal baffle 26, and a seal member (see reference numeral 11d in FIG. 11) is arranged so as to seal a gap with the lower inner surface of the shell 23. I have to. In addition, a vertical plate first mounting portion 34 that can be attached to the first tube plate 3 is provided at 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 35 of a vertical plate that can be attached to the second tube plate 4 is provided. Further, the upper seal fixing portion 33 and the lower seal fixing portion are provided with an end side mounting portion 36 of a horizontal plate that can be attached to the second water chamber 6.

  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 21, 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.

  In addition, the compressed air in the shell 23 flows obliquely downward from the air inlet 24 and travels from one side to the other side (left side to right side in FIG. 2) on the inlet side (inlet extending direction), and in the lower part in the shell 23. Further, the direction is changed to the lateral direction and the oblique direction, and the air flows into the inlet of the bundle 21, and after flowing in the bundle 21 in the lateral direction and cooled, the lateral direction and the obliquely upward direction from the outlet 30 and the opening 30 on the outlet side. From the air outlet to the upper direction (a direction substantially perpendicular to the surface of the upper seal baffle 25).

  At the same time, the compressed air flows into the bundle 21 from the middle position on the inlet side of the bundle 21 by the opening portion 31 on the inlet side, and flows out of the bundle 21 from the middle position on the outlet side of the bundle 21 by the opening portion 30 on the outlet side. The flow of compressed air in the bundle 21 is made uniform to reduce the flow unevenness.

Thus, according to the embodiment, the opening portion 30 of the fluid is provided on the outlet side of the upper seal baffle 25, and the opening portion 30 changes the direction of the fluid flowing out from the outlet of the bundle 21. Since it is guided to one side (upper seal baffle 25 side), compressed air is flowed from the midway position of the bundle 21 to the upper seal baffle 25 side to reduce the uneven flow in the bundle 21 and efficiently exchange heat with the bundle 21. can do. Further, the opening portion 30 of the outlet side, and consists of the tip with respect to the total length L ₀ along the flow direction of the compressed air at 3% or more 30% or less of the length L _1, the flow of fluid in the bundle 21 The unevenness of the flow can be further reduced by appropriately equalizing, and heat can be exchanged appropriately and efficiently by the bundle 21. Here, when the opening portion 30 on the outlet side is larger than 30% from the tip with respect to the total length L ₀ , the problem that the compressed air does not sufficiently flow through the bundle 21 and the efficiency of heat exchange cannot be increased. There is. Moreover, when the opening part 30 on the outlet side is less than 3% from the tip with respect to the total length L ₀ , the effect of the opening part 30 on the outlet side cannot be sufficiently obtained, and the efficiency of heat exchange is increased. There is a problem that can not be.

In the embodiment, a fluid opening portion 31 is provided on the inlet side of the upper seal baffle 25, and the opening portion 31 changes the direction of the fluid flowing into the inlet of the bundle 21 from one surface of the bundle 21 to one surface of the bundle 21. When configured to be guided between the upper seal baffle 25 disposed and the lower seal baffle 26 disposed on the other surface of the bundle 21, flow deviation in the bundle 21 is reduced, and the bundle 21 is efficient. Heat exchange. Also, opening 31 of the inlet side, and consists of the tip with respect to the total length L ₀ along the flow direction of the compressed air at 3% or more than 10% of the length L _2, the flow of fluid in the bundle 21 The unevenness of the flow can be further reduced by appropriately equalizing, and heat can be exchanged appropriately and efficiently by the bundle 21. Here, when the opening part 30 on the outlet side is larger than 10% from the tip with respect to the total length L ₀ , the compressed air does not sufficiently flow through the bundle 21, and the heat exchange efficiency cannot be increased. There's a problem. Moreover, when the opening part 30 on the outlet side is less than 3% from the tip with respect to the total length L ₀ , the effect of the opening part 31 on the inlet side cannot be sufficiently obtained, and the efficiency of heat exchange is increased. There is a problem that can not be.

  In the embodiment, when the opening portion 31 on the inlet side and the opening portion 30 on the outlet side of the upper seal baffle 25 are formed along the edges 25c and 25d, the opening portion 31 on the inlet side and the opening portion on the outlet side are formed. The compressed air easily flows into and out of the bundle 21 by 30, and the uneven flow of the compressed air is further reduced, so that the bundle 21 can efficiently exchange heat.

  In the embodiment, when the opening portion 31 on the inlet side and the opening portion 30 on the outlet side of the upper seal baffle 25 are configured by notches or / and openings, the opening portion 31 on the inlet side and the opening portion 30 on the outlet side are provided. As a result, the compressed air easily flows into and out of the bundle 21, the bias of the flow of the compressed air is further reduced, and the bundle 21 can efficiently exchange heat.

  In the embodiment, a shell 23 that houses the bundle 21 and the seal baffle 22 and has an air inlet 24 disposed upward is provided. The air inlet 24 is on the inlet side of the seal baffle 22 and the inlet of the bundle 21 as viewed from above. When the opening 31 formed on the inlet side of the seal baffle 22 is provided near the other side of the bundle 21 in the extending direction, the compressed air is extended to the inlet side. Since the air flows from the air inlet 24 obliquely downward so as to go from one side to the other side in the direction, the uneven flow of the compressed air can be further reduced, and the bundle 21 can efficiently exchange heat.

  In the embodiment, when the porous plate 32 is provided at a position closer to one side of the inlet of the bundle 21, the compressed air is further inclined downward from the air inlet 24 so as to go from one side to the other side in the inlet extending direction. Since it flows, the unevenness of the flow of compressed air can be further reduced, and heat can be efficiently exchanged by the bundle 21.

  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, the opening may be a single or plural cutouts or openings, and various changes may be made without departing from the scope of the present invention.

1a Tube 1b Plate fin (fin)
21 Bundle 22 Seal baffle 23 Shell 24 Air inlet (fluid inlet)
25c Edge part 25d Edge part 30 Open part on the outlet side 30a Open part on the outlet side 31 Open part on the inlet side 32 Plate

Claims (6)

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 heat exchanger comprising a seal baffle disposed on one side and the other side,
A heat exchanger comprising a fluid opening on the outlet side of the seal baffle, the opening being configured to guide the direction of the fluid flowing out from the outlet of the bundle to one surface side of the bundle. .   The opening part of the fluid is provided on the inlet side of the seal baffle, and the opening part is arranged so that the direction of the fluid flowing into the inlet of the bundle is arranged on one side of the bundle from one side of the bundle and the bundle. The heat exchanger according to claim 1, wherein the heat exchanger is configured to be guided to a seal baffle disposed on the other surface.   The heat exchanger according to claim 1 or 2, wherein an opening of the seal baffle is formed along an edge.   The heat exchanger according to any one of claims 1 to 3, wherein the opening portion of the seal baffle is configured by a notch or / and an opening.   A shell for accommodating the bundle and the seal baffle and having a fluid inlet disposed upward is provided, and the fluid inlet is disposed on the inlet side of the seal baffle and on one side in the inlet extending direction of the bundle as viewed from above. The heat exchanger according to claim 2, wherein the opening portion disposed on the inlet side of the seal baffle is provided on the other side of the bundle extending direction.   The heat exchanger according to claim 5, further comprising a porous plate at a position near one side of the inlet of the bundle.

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