Finned shell type heat exchanger

Abstract

The finned shell type heat exchanger comprises a heat exchange core arranged in a heat exchanger shell, a first end plate and a second end plate are fixedly arranged at two ports of the heat exchanger shell respectively, and a hot working medium inlet pipe and a hot working medium outlet pipe are arranged on the first end plate and the second end plate respectively; the heat exchange core body comprises a heat exchange pipe which is bent and twisted into a multi-layer space structure, the heat exchange pipe comprises a plurality of layers of heat exchange straight pipes which are arranged in parallel at intervals, the heat exchange straight pipes are arranged in the axial direction of the heat exchanger shell, and every two heat exchange straight pipes are communicated through a heat exchange bent pipe; annular fins are arranged on heat exchange straight pipes of the heat exchange pipes in a sleeving mode, a plurality of heat dissipation protrusions are arranged on the outer edges of the circumferences of the annular fins at equal intervals, and the heat dissipation protrusions are all arranged in the axial directions of the heat exchange straight pipes. Two ports of the heat exchange tube are respectively a cold working medium inlet and a cold working medium outlet; the heat exchanger has the advantages of realizing a heat exchange mode of parallel flow of cold and hot working media, reducing flowing resistance of the working media, and being large in heat exchange area, uniform in heat exchange, high in heat exchange efficiency and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchangers, and specifically relates to a finned shell heat exchanger. Background Art

[0002] Currently, heat exchangers with heat transfer elements mainly include shell-and-tube heat exchangers, plate heat exchangers, plate-shell heat exchangers, plate-fin heat exchangers, and finned-tube heat exchangers. Each heat transfer form has its own advantages; plate-fin heat exchangers are mainly used for heat exchange between gases. When used for heat exchange between liquids or in gas-liquid two-phase systems, there are problems such as large resistance, large size during use, uneven fluid distribution, and inability to be disassembled; finned-tube heat exchangers are mainly used for heat exchange between gas-liquid two-phase or with liquids, and achieve heat exchange through forced convection of a fan, but there are problems such as large volume and uneven heat exchange of the air flow between the heat exchange fins; shell-and-tube heat exchangers are mostly used for heat exchange between liquids or with two-phase systems, and have problems such as large volume and poor heat exchange effect. The finned shell heat exchanger is a form between plate-fin heat exchangers, shell-and-tube heat exchangers, and finned-tube heat exchangers. It combines the advantages of the three, with good heat transfer effect, compact structure, small volume, easy to clean, and small pressure drop. It can be applied to condensers and evaporators in steam compression systems, coolers and aftercoolers in reverse Brayton refrigeration systems, etc.

[0003] Patent Publication No. CN210014679U discloses a heat exchanger with sleeve fins, including a heat exchange core fixedly arranged along the axial direction inside a shell tube. The heat exchange core includes fins sleeved on a heat exchange tube. The fins are arranged along the radial direction of the shell tube, and the hot and cold working fluids are in a vertical heat exchange form. However, there are problems such as large flow resistance of the working fluid, small heat exchange area, uneven heat exchange, and low heat exchange efficiency. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the existing defects, provide a finned shell heat exchanger, realize the heat exchange form of parallel flow of hot and cold working fluids, reduce the flow resistance of the working fluid, have a large heat exchange area, uniform heat exchange, and high heat exchange efficiency; facilitate the quick disassembly and cleaning of the heat exchanger shell and the heat exchange core, and can effectively solve the problems in the background art.

[0005] To achieve the above object, the present invention provides the following technical solution: A finned shell heat exchanger, comprising a heat exchange core disposed inside a heat exchanger housing, the heat exchanger housing being of a straight cylindrical structure; end plates one and two are respectively fixedly provided at both ports of the heat exchanger housing, a hot working fluid inlet pipe is provided on end plate one, and a first perforation is also provided on end plate one, a hot working fluid outlet pipe is provided on end plate two, and a second perforation is also provided on end plate two; the heat exchange core includes heat exchange tubes bent and twisted into a multi-layer space structure, the heat exchange tubes include a plurality of heat exchange straight tubes arranged in parallel at intervals, the heat exchange straight tubes are all arranged along the axial direction of the heat exchanger housing, and two adjacent heat exchange straight tubes are connected and communicated through heat exchange elbows; annular fins are sleeved on the heat exchange straight tubes of the heat exchange tubes, a plurality of heat dissipation protrusions are equidistantly provided on the circumferential outer edge of the annular fins, and the heat dissipation protrusions are all arranged along the axial direction of the heat exchange straight tubes; the two ports of the heat exchange tubes are respectively a cold working fluid inlet and a cold working fluid outlet, and the cold working fluid inlet and the cold working fluid outlet of the heat exchange tubes respectively penetrate through the first perforation and the second perforation.

[0006] Further, the annular fin is formed by winding a formed flat fin, and the annular fin is welded to the corresponding heat exchange straight tube.

[0007] Further, the heat exchange core further includes a plurality of horizontally arranged core partition plates, and partition brackets for connecting and supporting the heat exchange tubes are provided on the core partition plates; linear slideways are horizontally provided on the inner wall of the heat exchanger housing at positions corresponding to the core partition plates, and the partition brackets are slidably arranged on the corresponding linear slideways.

[0008] Further, a flow divider is provided on the inner side wall of end plate one at a position corresponding to the hot working fluid inlet pipe, the flow divider includes a recessed housing, the longitudinal section of the recessed housing is an arc structure, and the convex surface of the recessed housing faces the hot working fluid inlet pipe, an X-shaped air distribution opening is provided on the recessed housing at a position corresponding to the hot working fluid inlet pipe, and a support rod connected to end plate one is also provided on the recessed housing.

[0009] Further, the recessed housing includes an arc-shaped housing, and quarter spherical housings adapted to it are provided at both ends of the arc-shaped housing, and the air distribution opening is provided on the arc-shaped housing.

[0010] Further, a left flange ring is provided on the outer edge of the left port of the heat exchanger housing, a right flange ring is provided on the outer edge of the right port of the heat exchanger housing, end plate one is fixedly connected to the left flange ring through a first fastening bolt, and end plate two is fixedly connected to the right flange ring through a second fastening bolt.

[0011] Further, a housing left support and a housing right support are respectively provided on the left and right sides of the bottom end of the heat exchanger housing.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: In this finned shell heat exchanger, the heat exchange tubes are bent and twisted into a multi-layer spatial structure. The annular fins on the straight heat exchange tubes are formed by surrounding the formed flat fins. The heat dissipation protrusions formed on the circumferential outer edge of the annular fins are arranged along the axial direction of the straight heat exchange tubes, realizing the heat exchange form of parallel flow of hot and cold working fluids, reducing the flow resistance of the working fluids, and having a large heat exchange area of the annular fins, improving the heat exchange efficiency; through the flow divider, the working fluids entering the heat exchanger shell from the hot working fluid inlet pipe are evenly divided and diffused, effectively promoting the uniform distribution of the hot fluid in all directions, with uniform heat exchange and improved heat exchange efficiency; the heat exchange core is slidably connected to the heat exchanger shell, facilitating the quick disassembly and cleaning of the heat exchanger shell and the heat exchange core. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present invention; Figure 2 is a front view of the heat exchanger of the present invention; Figure 3 is a schematic diagram of the internal structure of the shell of the present invention; Figure 4 is a schematic structural diagram of the heat exchange core of the present invention; Figure 5 is a schematic structural diagram of the heat exchange tube of the present invention; Figure 6 is a partially enlarged view of the annular fin of the present invention; Figure 7 is a schematic structural diagram of the core partition of the present invention; Figure 8 is a schematic structural diagram of the first end plate of the present invention; Figure 9 is a schematic structural diagram of the flow divider of the present invention; Figure 10 is a schematic structural diagram of the second end plate of the present invention.

[0014] In the figures: 1. Heat exchanger shell; 11. Left support of the shell; 12. Right support of the shell; 13. Linear slideway; 14. Left flange ring; 15. Right flange ring; 2. Heat exchange core; 21. Annular fin; 211. Heat dissipation protrusion; 22. Heat exchange tube; 221. Straight heat exchange tube; 222. Heat exchange elbow; 23. Core partition; 231. Partition support; 24. Cold working fluid inlet; 25. Cold working fluid outlet; 3. First end plate; 31. Hot working fluid inlet pipe; 32. Flow divider; 321. Concave shell; 3211. Arc shell; 3212. Quarter spherical shell; 322. Air distribution port; 323. Support rod; 33. First fastening bolt; 34. First through hole; 4. Second end plate; 41. Hot working fluid outlet pipe; 42. Second through hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention. Embodiment

[0016] Please refer to Figures 1-10 , the present invention provides a technical solution: a finned shell heat exchanger, including a heat exchange core 2 provided inside a heat exchanger housing 1, and the heat exchanger housing 1 is of a straight cylindrical structure; end plates 3 and 4 are respectively fixedly provided at both ends of the heat exchanger housing 1. A hot working medium inlet pipe 31 is provided on the end plate 3, and a first through hole 34 is also opened on the end plate 3. A hot working medium outlet pipe 41 is provided on the end plate 4, and a second through hole 42 is also opened on the end plate 4; the heat exchange core 2 includes heat exchange tubes 22 bent and twisted into a multi-layer space structure. The heat exchange tubes 22 include multiple layers of heat exchange straight tubes 221 arranged in parallel at intervals. The heat exchange straight tubes 221 are all arranged along the axial direction of the heat exchanger housing 1, and two adjacent heat exchange straight tubes 221 are connected and communicated through heat exchange elbows 222; annular fins 21 are sleeved on the heat exchange straight tubes 221 of the heat exchange tubes 22. The annular fins 21 are formed by surrounding a formed flat fin, and the annular fins 21 are welded to the corresponding heat exchange straight tubes 221. A plurality of heat dissipation protrusions 211 are formed at equal intervals on the circumferential outer edge of the annular fins 21, and the heat dissipation protrusions 211 are all arranged along the axial direction of the heat exchange straight tubes 221; the two ends of the heat exchange tubes 22 are respectively a cold working medium inlet 24 and a cold working medium outlet 25, and the cold working medium inlet 24 and the cold working medium outlet 25 of the heat exchange tubes 22 respectively penetrate through the first through hole 34 and the second through hole 42; The flat fins used for the annular fins 21 can calculate and confirm the fin pitch and fin height according to the actual load, and reasonably adopt different welding methods, including reverse methods such as laser welding and thermal bonding welding; The heat exchange core 2 further includes a plurality of core partitions 23 arranged horizontally. Partition brackets 231 for connecting and supporting the heat exchange tubes 22 are provided on the core partitions 23; linear slides 13 are horizontally provided on the inner wall of the heat exchanger housing 1 at positions corresponding to the core partitions 23, and the partition brackets 231 are slidably arranged on the corresponding linear slides 13; On the inner side wall of the first end plate 3, at a position corresponding to the heat working medium inlet pipe 31, a flow divider 32 is provided. The flow divider 32 includes a concave housing 321. The concave housing 321 includes an arc-shaped housing 3211. At both ends of the arc-shaped housing 3211, quarter-spherical housings 3212 adapted thereto are provided. An X-shaped air distribution opening 322 is formed on the arc-shaped housing 3211; the convex surface of the concave housing 321 faces the heat working medium inlet pipe 31, and a support rod 323 connected to the first end plate 3 is further provided on the concave housing 321.

[0017] During use: The heat working medium enters the heat exchanger housing 1 through the heat working medium inlet pipe 31. The heat working medium entering the heat exchanger housing 1 is divided by the flow divider 32 and then flows towards the heat working medium outlet pipe 41. At the same time, the cold working medium enters the heat exchange tubes 22 through the cold working medium inlet 24, and the cold working medium exchanges heat with the heat working medium flowing in the heat exchanger housing 1 through the annular fins 21. The heat-exchanged heat working medium flows out of the heat exchanger housing 1 through the heat working medium outlet pipe 41, and the heat-exchanged cold working medium flows out of the heat exchange core 2 and the heat exchanger housing 1 through the cold working medium outlet 25; The annular fins 21 are formed by winding the formed straight fins. The annular fins 21 combine the flexible bending characteristics of the straight fins to wind and weld them on the heat exchange tubes 22, solving the problem of axially fixing the fins on the heat exchange tubes 22; the heat dissipation protrusions 211 formed on the outer circumference of the annular fins 21 are arranged along the axial direction of the straight heat exchange tubes 221, realizing the heat exchange form of parallel flow of the hot and cold working media, reducing the flow resistance, and the annular fins 21 have a large heat exchange area, improving the heat exchange efficiency; through the special structure of the flow divider 32, the working medium entering the heat exchanger housing 1 from the heat working medium inlet pipe 31 is evenly divided and diffused, effectively promoting the uniform distribution of the hot fluid in all directions, and the working medium exchanges heat evenly, improving the heat exchange efficiency; The heat exchange core 2 is slidably connected to the linear slideway 13 on the heat exchanger housing 1 through the core partition plate 23, facilitating the quick disassembly and cleaning of the heat exchanger housing 1 and the heat exchange core 2.

[0018] Further, a left flange ring 14 is provided on the outer edge of the left port of the heat exchanger housing 1, and a right flange ring 15 is provided on the outer edge of the right port of the heat exchanger housing 1. The first end plate 3 is fixedly connected to the left flange ring 14 through a first fastening bolt 33, and the second end plate 4 is fixedly connected to the right flange ring 15 through a second fastening bolt.

[0019] Further, a left housing support 11 and a right housing support 12 are respectively provided on the left and right sides of the bottom end of the heat exchanger housing 1.

[0020] In the finned shell heat exchanger disclosed in this embodiment, the heat exchange tubes 22 are bent and twisted into a multi-layer spatial structure. The annular fins 21 on the straight heat exchange tubes 221 are formed by surrounding the formed flat fins. The heat dissipation protrusions 211 formed on the outer circumference of the annular fins 21 are arranged along the axial direction of the straight heat exchange tubes 221, realizing the heat exchange form of parallel flow of hot and cold working fluids, reducing the flow resistance of the working fluid, and having a large heat exchange area of the annular fins 21, improving the heat exchange efficiency; the shunt 32 evenly shunts and diffuses the working fluid entering the heat exchanger housing 1 from the hot working fluid inlet pipe 31, effectively promoting the uniform distribution of the hot fluid around, uniform heat exchange of the working fluid, and improving the heat exchange efficiency; the heat exchange core 2 is slidably connected to the heat exchanger housing 1, facilitating the quick disassembly and cleaning of the heat exchanger housing 1 and the heat exchange core 2.

[0021] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A finned shell-and-tube heat exchanger, comprising a heat exchange core disposed inside a heat exchanger shell, characterized in that: The heat exchanger housing is of a straight cylindrical structure; end plates one and two are respectively fixedly provided at both ports of the heat exchanger housing. A hot working medium inlet pipe is provided on end plate one, and a first perforation is also opened on end plate one. A hot working medium outlet pipe is provided on end plate two, and a second perforation is also opened on end plate two; the heat exchange core includes heat exchange tubes bent and twisted into a multi-layer space structure. The heat exchange tubes include multiple heat exchange straight tubes arranged in parallel at intervals. The heat exchange straight tubes are all arranged along the axial direction of the heat exchanger housing, and two adjacent heat exchange straight tubes are connected and communicated through heat exchange elbow tubes; annular fins are sleeved on the heat exchange straight tubes of the heat exchange tubes. A plurality of heat dissipation protrusions are equidistantly arranged on the circumferential outer edge of the annular fins, and the heat dissipation protrusions are all arranged along the axial direction of the heat exchange straight tubes; the two ports of the heat exchange tubes are respectively a cold working medium inlet and a cold working medium outlet, and the cold working medium inlet and the cold working medium outlet of the heat exchange tubes respectively penetrate through the first perforation and the second perforation.

2. The finned shell heat exchanger according to claim 1, wherein: The annular fin is formed by winding a formed flat fin, and the annular fin is welded to the corresponding heat exchange straight tube.

3. The finned shell heat exchanger according to claim 1, characterized in that: The heat exchange core further includes a plurality of horizontally arranged core partition plates, and partition brackets for connecting and supporting the heat exchange tubes are provided on the core partition plates; linear slideways are horizontally provided on the inner wall of the heat exchanger housing at positions corresponding to the core partition plates, and the partition brackets are slidably arranged on the corresponding linear slideways.

4. The finned shell heat exchanger according to claim 1, wherein: A flow divider is provided on the inner side wall of end plate one at a position corresponding to the hot working medium inlet pipe. The flow divider includes a concave housing. The longitudinal section of the concave housing is an arc structure, and the convex surface of the concave housing faces the hot working medium inlet pipe. An X-shaped air distribution opening is opened on the concave housing at a position corresponding to the hot working medium inlet pipe, and a support rod connected to end plate one is also provided on the concave housing.

5. The finned shell heat exchanger according to claim 4, characterized in that: The concave housing includes an arc-shaped housing, and quarter-spherical housings adapted to it are provided at both ends of the arc-shaped housing. The air distribution opening is opened on the arc-shaped housing.

6. The finned shell heat exchanger according to claim 1, wherein: A left flange ring is provided on the outer edge of the left port of the heat exchanger housing, and a right flange ring is provided on the outer edge of the right port of the heat exchanger housing. End plate one is fixedly connected to the left flange ring through a first fastening bolt, and end plate two is fixedly connected to the right flange ring through a second fastening bolt.

7. The finned shell heat exchanger according to claim 1, wherein: A housing left support and a housing right support are respectively provided on the left and right sides of the bottom end of the heat exchanger housing.

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