Finned heat exchanger

Abstract

The utility model discloses a finned shell heat exchanger, including the heat exchange core body that is equipped with in the heat exchanger shell, the both ends of heat exchanger shell are respectively fixed with end plate no.

Description

Technical Field

[0001] This utility model relates to the field of heat exchanger technology, specifically a finned heat exchanger. Background Technology

[0002] Currently, heat exchangers with heat transfer elements mainly consist of shell-and-tube heat exchangers, plate heat exchangers, plate-and-shell heat exchangers, plate-fin heat exchangers, and finned-tube heat exchangers. Each type of heat exchanger has its own advantages. Plate-fin heat exchangers are mainly used for gas-to-gas heat exchange. When used for heat exchange between liquids or between gas and liquid phases, they suffer from high resistance, large size, uneven fluid distribution, and inability to be disassembled. Tube-fin heat exchangers are mainly used for heat exchange between gas and liquid phases or between gas and liquid, achieving heat exchange through forced convection by a fan. They suffer from large size and uneven heat exchange between the heat exchange fins. Shell-and-tube heat exchangers are mostly used for heat exchange between liquids or between liquids and two phases, but they suffer from large size and poor heat exchange efficiency.

[0003] Finned heat exchangers are a type of heat exchanger that falls between plate-fin heat exchangers, shell-and-tube heat exchangers, and finned-tube heat exchangers. They combine the advantages of all three, offering good heat transfer, compact structure, small size, easy cleaning, and low pressure drop. They can be used as condensers and evaporators in vapor compression systems, and as coolers and aftercoolers in reverse Brayton refrigeration systems.

[0004] Patent publication number CN210014679U discloses a finned heat exchanger, which includes a heat exchange core fixedly disposed inside the shell tube along its axial direction. The heat exchange core includes fins sleeved on the 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, it has problems such as large working fluid flow resistance, small heat exchange area, uneven heat exchange, and low heat exchange efficiency. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the existing defects and provide a finned heat exchanger that realizes a heat exchange form of parallel flow of hot and cold working fluids, reduces the flow resistance of the working fluid, has a large heat exchange area, uniform heat exchange, and high heat exchange efficiency; it also facilitates quick disassembly and cleaning of the heat exchanger shell and heat exchange core, and can effectively solve the problems in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a finned heat exchanger, comprising a heat exchange core disposed within a heat exchanger shell, the heat exchanger shell being a cylindrical structure; end plate one and end plate two are respectively fixed at both ends of the heat exchanger shell, end plate one having a working fluid inlet pipe and a perforation one, end plate two having a working fluid outlet pipe and a perforation two; the heat exchange core comprises heat exchange tubes bent and twisted into a multi-layered spatial structure, the heat exchange tubes... The device includes multiple parallel and spaced heat exchange straight tubes, all arranged along the axial direction of the heat exchanger shell, and connected to each other by heat exchange bends. Each heat exchange straight tube is fitted with annular fins, and multiple heat dissipation protrusions are evenly spaced along the outer circumference of the annular fins, all arranged along the axial direction of the heat exchange straight tube. The two ends of the heat exchange tube are a cold working fluid inlet and a cold working fluid outlet, respectively, which are penetrated through perforation one and perforation two.

[0007] Furthermore, the annular fins are formed by surrounding with shaped straight fins, and the annular fins are welded to the corresponding heat exchange straight tubes.

[0008] Furthermore, the heat exchange core also includes multiple horizontally arranged core partitions, each of which is provided with a partition bracket for connecting and supporting the heat exchange tubes; the inner wall of the heat exchanger shell is provided with horizontal straight slides at the corresponding core partition positions, and the partition brackets are slidably arranged on the corresponding straight slides.

[0009] Furthermore, a flow divider is provided on the inner wall of the end plate at the position corresponding to the heat inlet pipe. The flow divider includes a recessed shell with an arc-shaped longitudinal section and the outer convex surface of the recessed shell facing the heat inlet pipe. An X-shaped air vent is provided on the recessed shell at the position corresponding to the heat inlet pipe. A support rod connected to the end plate is also provided on the recessed shell.

[0010] Furthermore, the recessed housing includes an arc-shaped housing, with a quarter-spherical housing adapted to each end of the arc-shaped housing, and the air vent is opened on the arc-shaped housing.

[0011] Furthermore, a left flange ring is provided on the outer edge of the left port of the heat exchanger shell, and a right flange ring is provided on the outer edge of the right port of the heat exchanger shell. End plate one is fixedly connected to the left flange ring by fastening bolt one, and end plate two is fixedly connected to the right flange ring by fastening bolt two.

[0012] Furthermore, a left support and a right support are respectively provided on the left and right sides of the bottom end of the heat exchanger shell.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows: In this finned heat exchanger, the heat exchange tube is bent and twisted into a multi-layered spatial structure. The annular fins on the heat exchange straight tube are formed by shaped straight fins surrounding the tube. The heat dissipation protrusions formed on the outer edge of the annular fins are arranged along the axial direction of the heat exchange straight tube, realizing a parallel flow heat exchange of hot and cold working fluids, reducing the flow resistance of the working fluid, and the annular fins have a large heat exchange area, thus improving the heat exchange efficiency. The flow divider makes the working fluid entering the heat exchanger shell from the hot working fluid inlet pipe evenly distributed and diffused, effectively promoting the uniform distribution of the hot fluid to all sides, resulting in uniform heat exchange and improved heat exchange efficiency. The heat exchange core is slidably connected to the heat exchanger shell, which facilitates quick disassembly and cleaning of the heat exchanger shell and the heat exchange core. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the structure of this utility model;

[0015] Figure 2 This is a front view of the heat exchanger of this utility model;

[0016] Figure 3 This is a schematic diagram of the internal structure of the housing of this utility model;

[0017] Figure 4 This is a schematic diagram of the heat exchange core structure of this utility model;

[0018] Figure 5 This is a schematic diagram of the heat exchange tube structure of this utility model;

[0019] Figure 6 This is a partial enlarged view of the annular fin of this utility model;

[0020] Figure 7 This is a schematic diagram of the core partition structure of this utility model;

[0021] Figure 8 This is a schematic diagram of the end plate structure of this utility model;

[0022] Figure 9 This is a schematic diagram of the shunt structure of this utility model;

[0023] Figure 10 This is a schematic diagram of the second end plate structure of this utility model.

[0024] In the diagram: 1. Heat exchanger shell; 11. Left shell support; 12. Right shell support; 13. Straight slide; 14. Left flange ring; 15. Right flange ring; 2. Heat exchanger core; 21. Annular fins; 211. Heat dissipation protrusion; 22. Heat exchanger tube; 221. Heat exchanger straight tube; 222. Heat exchanger bend; 23. Core partition; 231. Partition support; 24. Cold medium inlet; 25. Cold medium outlet; 3. End plate one; 31. Hot medium inlet pipe; 32. Diverter; 321. Recessed shell; 3211. Arc-shaped shell; 3212. Quarter-spherical shell; 322. Air outlet; 323. Support rod; 33. Fastening bolt one; 34. Perforation one; 4. End plate two; 41. Hot medium outlet pipe; 42. Perforation two. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0026] Please see Figure 1-10 This utility model provides a technical solution: a finned heat exchanger, comprising a heat exchange core 2 disposed within a heat exchanger shell 1, wherein the heat exchanger shell 1 has a cylindrical structure; end plates 3 and 4 are fixedly disposed at the two ends of the heat exchanger shell 1, respectively; end plate 3 is provided with a heat transfer medium inlet pipe 31 and a perforation 34; end plate 4 is provided with a heat transfer medium outlet pipe 41 and a perforation 42; the heat exchange core 2 comprises heat exchange tubes 22 bent and twisted into a multi-layered spatial structure, each heat exchange tube 22 comprising multiple parallel and spaced heat exchange straight tubes 221, all arranged along the axial direction of the heat exchanger shell 1. The heat exchange straight tubes 221 are connected to each other by heat exchange bends 222. Each heat exchange straight tube 221 of the heat exchange tube 22 is fitted with annular fins 21. The annular fins 21 are formed by forming straight fins and are welded to the corresponding heat exchange straight tubes 221. Multiple heat dissipation protrusions 211 are formed at equal intervals along the outer circumference of the annular fins 21, and the heat dissipation protrusions 211 are all arranged along the axial direction of the heat exchange straight tube 221. The two ends of the heat exchange tube 22 are the cold working fluid inlet 24 and the cold working fluid outlet 25, respectively. The cold working fluid inlet 24 and the cold working fluid outlet 25 of the heat exchange tube 22 pass through the first through hole 34 and the second through hole 42, respectively.

[0027] The straight fins used in the annular fin 21 can be calculated and confirmed according to the actual load, and different welding methods can be reasonably adopted, including laser welding, hot bonding welding, etc.

[0028] The heat exchange core 2 also includes a plurality of horizontally arranged core partitions 23, each of which is provided with a partition bracket 231 for connecting and supporting the heat exchange tube 22; the inner wall of the heat exchanger shell 1 is provided with a horizontal straight slide rail 13 at the position corresponding to the core partition 23, and the partition bracket 231 is slidably arranged on the corresponding straight slide rail 13.

[0029] A flow divider 32 is provided on the inner wall of the end plate 3 at the position corresponding to the heat inlet pipe 31. The flow divider 32 includes a recessed shell 321, which includes an arc-shaped shell 3211. Both ends of the arc-shaped shell 3211 are provided with a quarter-spherical shell 3212 that is adapted to it. An X-shaped air distribution port 322 is opened on the arc-shaped shell 3211. The outer convex surface of the recessed shell 321 faces the heat inlet pipe 31. A support rod 323 connected to the end plate 3 is also provided on the recessed shell 321.

[0030] In use: The hot working medium enters the heat exchanger shell 1 through the hot working medium inlet pipe 31. After being diverted by the distributor 32, the hot working medium flows toward the hot working medium outlet pipe 41. At the same time, the cold working medium enters the heat exchange tube 22 through the cold working medium inlet 24. The cold working medium exchanges heat with the hot working medium flowing in the heat exchanger shell 1 through the annular fins 21. The hot working medium after heat exchange flows out of the heat exchanger shell 1 through the hot working medium outlet pipe 41. The cold working medium after heat exchange flows out of the heat exchange core 2 and the heat exchanger shell 1 through the cold working medium outlet 25.

[0031] The annular fin 21 is formed by surrounding a straight fin. The annular fin 21 combines the flexibility of the straight fin with the ability to bend and is then wrapped around and welded to the heat exchange tube 22, solving the problem of axially fixing the fins on the heat exchange tube 22. The heat dissipation protrusion 211 formed on the outer edge of the annular fin 21 is arranged along the axial direction of the heat exchange tube 221, realizing a parallel flow of hot and cold working fluids, reducing flow resistance. Moreover, the annular fin 21 has a large heat exchange area, improving heat exchange efficiency. Through the special structure of the distributor 32, the working fluid entering the heat exchanger shell 1 from the hot working fluid inlet pipe 31 is evenly distributed and diffused, effectively promoting the uniform distribution of the hot fluid to all sides, resulting in uniform heat exchange of the working fluid and improving heat exchange efficiency.

[0032] The heat exchange core 2 is slidably connected to the linear slide rail 13 on the heat exchanger shell 1 via the core partition 23, which facilitates quick disassembly and cleaning of the heat exchanger shell 1 and the heat exchange core 2.

[0033] Furthermore, a left flange ring 14 is provided on the outer edge of the left port of the heat exchanger shell 1, and a right flange ring 15 is provided on the outer edge of the right port of the heat exchanger shell 1. End plate 1 3 is fixedly connected to the left flange ring 14 by fastening bolt 1 33, and end plate 2 4 is fixedly connected to the right flange ring 15 by fastening bolt 2.

[0034] Furthermore, a left support 11 and a right support 12 are respectively provided on the left and right sides of the bottom end of the heat exchanger shell 1.

[0035] The finned heat exchanger disclosed in this embodiment has a heat exchange tube 22 that is bent and twisted into a multi-layered spatial structure. The annular fins 21 on the heat exchange straight tube 221 are formed by forming straight fins. The heat dissipation protrusions 211 formed on the outer edge of the annular fins 21 are arranged along the axial direction of the heat exchange straight tube 221 to achieve a parallel flow of hot and cold working fluids, reduce the flow resistance of the working fluid, and improve the heat exchange efficiency due to the large heat exchange area of ​​the annular fins 21. The working fluid entering the heat exchanger shell 1 from the hot working fluid inlet pipe 31 is evenly distributed and diffused by the flow divider 32, which effectively promotes the uniform distribution of the hot fluid to the surrounding area, resulting in uniform heat exchange of the working fluid and improved heat exchange efficiency. The heat exchange core 2 is slidably connected to the heat exchanger shell 1, which facilitates quick disassembly and cleaning of the heat exchanger shell 1 and the heat exchange core 2.

[0036] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A finned heat exchanger, comprising a heat exchange core disposed within a heat exchanger shell, characterized in that: The heat exchanger shell has a cylindrical structure. Two end plates, End Plate 1 and End Plate 2, are fixed at both ends of the heat exchanger shell. End Plate 1 has a working fluid inlet pipe and a perforation. End Plate 2 has a working fluid outlet pipe and a perforation. The heat exchange core includes heat exchange tubes bent and twisted into a multi-layered spatial structure. Each heat exchange tube includes multiple parallel and spaced straight heat exchange tubes, all arranged along the axial direction of the heat exchanger shell. Each pair of straight heat exchange tubes is connected by a heat exchange bend. Annular fins are fitted onto each straight heat exchange tube. Multiple heat dissipation protrusions are evenly spaced along the outer circumference of the annular fins, all arranged along the axial direction of the straight heat exchange tube. The two ends of the heat exchange tube are a cold working fluid inlet and a cold working fluid outlet, respectively, which pass through Perforation 1 and Perforation 2.

2. The finned heat exchanger according to claim 1, characterized in that: The annular fins are formed by surrounding straight fins and are welded to the corresponding heat exchange straight tubes.

3. A finned heat exchanger according to claim 1, characterized in that: The heat exchange core also includes multiple horizontally arranged core partitions, each of which is provided with a partition bracket for connecting and supporting the heat exchange tubes; the inner wall of the heat exchanger shell is provided with horizontal straight slides at the corresponding core partition positions, and the partition brackets are slidably arranged on the corresponding straight slides.

4. A finned heat exchanger according to claim 1, characterized in that: A flow divider is provided on the inner wall of the end plate at the position corresponding to the inlet pipe of the heat working medium. The flow divider includes a recessed shell with an arc-shaped longitudinal section and the outer convex surface of the recessed shell facing the inlet pipe of the heat working medium. An X-shaped air distribution port is provided on the recessed shell at the position corresponding to the inlet pipe of the heat working medium. A support rod connected to the end plate is also provided on the recessed shell.

5. A finned heat exchanger according to claim 4, characterized in that: The recessed housing includes an arc-shaped housing, with a quarter-spherical housing at each end of the arc-shaped housing that is adapted to it, and the air distribution port is opened on the arc-shaped housing.

6. A finned heat exchanger according to claim 1, characterized in that: The heat exchanger shell has a left flange ring on the outer edge of the left port and a right flange ring on the outer edge of the right port. End plate one is fixedly connected to the left flange ring by fastening bolt one, and end plate two is fixedly connected to the right flange ring by fastening bolt two.

7. A finned heat exchanger according to claim 1, characterized in that: The heat exchanger shell has a left support and a right support on the left and right sides of its bottom.

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