Plate-fin heat exchanger

Abstract

The utility model relates to heat exchange equipment technical field discloses a plate-fin heat exchanger, including shell, the plate-fin mechanism of detachable containing in shell and lid, still be provided with the buckle mechanism of realizing quick assembly and disassembly on it. The buckle mechanism includes the connecting shaft fixed in the shell, the chuck rotatably sleeved on the connecting shaft, spring and the button linked with the chuck. The chuck is connected with the recess on the lid under the spring action to realize locking, and the chuck is driven to rotate to release the lock to make the lid can be disassembled, and the plate-fin mechanism in the inside can be taken out. The utility model discloses through detachable design, solved the technical pain point that the inside cannot be cleaned because of integrated structure of traditional heat exchanger. Its beneficial effect is, greatly simplified the maintenance process, reduced the operation difficulty and cost, and can long -term keep the high heat exchange efficiency of equipment, prolongs the service life.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange equipment technology, and in particular to a plate-fin heat exchanger. Background Technology

[0002] Plate-fin heat exchangers, as a key piece of equipment with a compact structure and high heat exchange efficiency, play an indispensable role in many industrial fields such as chemical engineering, refrigeration, gas separation, and energy utilization. Their core typically consists of numerous fins and baffles stacked and fixed together by brazing or other methods, forming complex and narrow fluid channels to achieve efficient heat transfer between different fluid media.

[0003] During long-term operation, the fluid medium inevitably contains impurities, particles, or byproducts of chemical reactions. These substances tend to deposit and adhere in the narrow finned channels inside the heat exchanger, gradually forming a fouling layer. The fouling layer has an extremely low thermal conductivity, and its presence not only significantly increases the resistance to fluid flow but also severely deteriorates heat transfer performance, leading to a substantial decrease in the heat exchanger's heat exchange efficiency and directly affecting the energy efficiency and stability of the entire process system.

[0004] However, in order to ensure sealing and structural strength under high pressure, the core plate-fin mechanism of existing plate-fin heat exchangers is usually completely welded and sealed inside the shell, forming a non-removable whole. This integrated structural design makes thorough physical or chemical cleaning of its internal flow channels extremely difficult. Conventional methods such as online backflushing have limited effectiveness and cannot eradicate stubborn fouling. Once internal blockage becomes severe, the only option is often to scrap and replace the entire heat exchanger, which not only causes huge economic losses but also interrupts continuous production. How to conveniently and effectively clean and maintain the interior of plate-fin heat exchangers has become a technical problem that urgently needs to be solved in the field. Therefore, this utility model proposes a plate-fin heat exchanger to overcome the shortcomings of the existing technology. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a plate-fin heat exchanger, which aims to improve the problem that some existing plate-fin heat exchangers have an integrated welded internal structure that cannot be disassembled, making it difficult to effectively clean the internal flow channels after long-term use.

[0006] This utility model provides a plate-fin heat exchanger, including: a shell, a plate-fin mechanism detachably housed within the shell, and a cover for closing the opening of the shell; and a snap-fit ​​mechanism disposed between the shell and the cover.

[0007] The latching mechanism has a specific structure that enables rapid locking and unlocking, and includes a connecting shaft, a latch head, a spring, and a button.

[0008] Furthermore, the outer shell, the cover, and the latching mechanism are combined in the following manner: the connecting shaft is fixed to the outer shell; the latch head is rotatably fitted onto the connecting shaft, and its head shape is adapted to the groove provided on the cover to achieve latching; the two ends of the spring act on the outer shell and the latch head respectively to apply elastic force to keep the latch head in the locked state of latching with the groove; one end of the button abuts against the bottom of the latch head, and pressing the button can drive the latch head to rotate around the connecting shaft, thereby disengaging its head from the groove and unlocking.

[0009] Preferably, the plate fin mechanism includes a plate fin assembly one and a plate fin assembly two stacked at intervals, and this staggered arrangement constitutes independent, isolated channels for different fluids to flow through.

[0010] Preferably, the structure of the plate-fin assembly includes multiple parallel partitions, with fins fixedly connected between adjacent partitions to increase the heat exchange area, and seals for preventing lateral fluid leakage are fixed at both edges of the partitions.

[0011] Preferably, the structure of the plate-fin assembly II includes multiple parallel partitions II, with fins II fixedly connected between adjacent partitions II, and sealing strips II fixed at both sides of the partitions II for sealing purposes.

[0012] Preferably, cavities serving as fluid buffers are provided on both sides of the outer shell, and a guide pipe connected to the cavity is fixedly connected to the outside of the outer shell. The structure is used to guide the fluid to enter or flow out of the plate fin mechanism smoothly and evenly.

[0013] Preferably, the plate-fin heat exchanger further includes an inlet pipe and an outlet pipe, which are respectively connected and fixed to guide pipes located at different ends of the heat exchanger to form a complete external fluid circulation loop.

[0014] Preferably, the sealing strip on the second plate fin assembly is installed in a position and has a shape that fits tightly with the inner wall of the outer shell. After the second plate fin assembly is installed in the outer shell, it can effectively seal the area between the second plate fin assembly and the cavity to prevent unnecessary mixing of the two fluids involved in heat exchange inside the equipment.

[0015] Preferably, as a specific implementation, the spring is a torsion spring, which is arranged around the connecting shaft, with one end abutting against a fixed point of the outer shell and the other end acting on the locking head, providing the locking head with a restoring torque that enables it to automatically return to the locked position after unlocking.

[0016] This utility model has the following beneficial effects: 1. This utility model achieves a detachable connection between the cover and the outer shell by setting a buckle mechanism consisting of a button, a clip, a connecting shaft and a spring. This solves the problem that the plate-fin heat exchanger cannot be disassembled due to its integrated structure and is difficult to clean internally in the prior art, thus achieving the technical effect of simplifying the maintenance process and reducing the difficulty of operation.

[0017] 2. This utility model solves the problem of significant decrease in heat exchange efficiency caused by scale buildup and blockage in the internal flow channels of heat exchangers after long-term use, by allowing the internal plate and fin mechanism to be easily extracted from the outer shell for cleaning and maintenance. This achieves the technical effect of maintaining high heat exchange efficiency and extending the service life of the equipment for a long time.

[0018] 3. This utility model solves the problems of uneven flow field distribution and insufficient utilization of heat exchange area caused by direct impact of fluid on fins in the prior art by setting a cavity inside the shell and cooperating with an external guide pipe to guide the fluid, thereby achieving the technical effect of optimizing fluid distribution and improving overall heat exchange efficiency. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of a plate-fin heat exchanger proposed in this utility model. Figure 2 This is a schematic diagram of the outer shell of a plate-fin heat exchanger proposed in this utility model. Figure 3 Figure 2 Enlarged view of point A in the middle; Figure 4 This is a schematic diagram of the structure of a baffle plate in a plate-fin heat exchanger proposed in this utility model; Figure 5 This is a schematic diagram of the structure of the second baffle plate in a plate-fin heat exchanger proposed in this utility model.

[0020] Legend: 1. Outer shell; 2. Lid; 3. Buckling mechanism; 31. Button; 32. Clip; 33. Connecting shaft; 34. Spring; 4. Plate-wing mechanism; 41. Plate and fin assembly 1; 411. Partition 1; 412. Seal 1; 413. Fin 1; 42. Plate and fin assembly two; 421. Partition two; 422. Seal two; 423. Fin two; 5. Guide tube; 6. Inlet tube; 7. Outlet tube; 8. Cavity. Detailed Implementation

[0021] 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

[0022] Reference Figures 1 to 5 This utility model provides a plate-fin heat exchanger, which aims to solve the problem that the internal structure of the existing plate-fin heat exchanger cannot be disassembled for cleaning and maintenance due to its integrated structure.

[0023] like Figure 1 and Figure 2 As shown, the plate-fin heat exchanger includes a housing 1, which defines an inner cavity for accommodating a plate-fin mechanism 4 and an opening for inserting or removing the plate-fin mechanism 4. The plate-fin mechanism 4 is detachably accommodated in the inner cavity of the housing 1. A cover 2 is used to detachably close the opening of the housing 1, and the cover 2 is provided with a groove.

[0024] Reference Figure 3 and Figure 4 The latching mechanism 3 includes a connecting shaft 33 fixed to the housing 1, a latch 32 rotatably mounted on the connecting shaft 33, a spring 34 providing elastic force, and a button 31 for operation. Specifically, the connecting shaft 33 provides a pivot for the rotation of the latch 32. The head of the latch 32 is shaped and sized to fit the groove of the cover 2. In the locked state, the head of the latch 32 engages with the groove, thereby firmly fixing the cover 2 to the housing 1. The spring 34 acts on the housing 1 and the latch 32 at both ends, and continuously applies a torsional force. This torsional force drives the head of the latch 32 to always remain in the locked position engaged with the groove. The button 31 is integrally formed or fixedly connected to the latch 32. When it is necessary to remove the cover 2, pressing the button 31 provides a driving force that overcomes the elastic force of the spring 34. This driving force drives the latch 32 to rotate around the connecting shaft 33 to the unlocked position. At this time, the head of the latch 32 disengages from the groove, and the cover 2 can be easily removed.

[0025] Reference Figure 5 The overall structure of the plate fin mechanism 4 is composed of at least one plate fin assembly 41 and at least one plate fin assembly 42 stacked alternately. After the plate fin assembly 41 and the plate fin assembly 42 are installed in the inner cavity of the outer shell 1, they form a gap between each other to form independent channels for the flow of two different fluids. Reference Figure 5The structure of the plate-fin assembly 41 includes multiple parallel partitions 411 and fins 413 fixedly connected between adjacent partitions 411 by brazing or bonding. The fins 413 increase the contact area between the fluid and the plate-fin assembly 41. To prevent the fluid from leaking from the side of the channel, sealing strips 412 are fixed at both sides of the partitions 411 to provide a sealing function. Reference Figure 5 The structure of the second plate-fin assembly 42 is similar to that of the first plate-fin assembly 41. It includes multiple parallel partition plates 421 and fins 423 fixedly connected between two adjacent partition plates 421. The fins 423 increase the contact area between another fluid and the second plate-fin assembly 42. Similarly, sealing strips 422 are fixed at both edges of the partition plates 421 to provide a sealing function.

[0026] Reference Figure 2 Both sides of the outer shell 1 are provided with cavities 8 as fluid buffers, and a guide pipe 5 connected to the cavity 8 is fixedly connected to the outside of the outer shell 1. Fluid enters the cavity 8 through the guide pipe 5, or flows out from the cavity 8 through the guide pipe 5. The plate-fin heat exchanger also includes an inlet pipe 6 and an outlet pipe 7. The inlet pipe 6 and the outlet pipe 7 are respectively connected and fixed to the guide pipes 5 located at different ends of the heat exchanger. A hot fluid enters from the inlet pipe 6 and is finally discharged from the outlet pipe 7, thus forming a complete hot fluid circulation loop. Reference Figure 5 The sealing strip 422 on the plate fin assembly 42 is designed in terms of its installation position and external dimensions so that it can fit tightly with the inner wall of the outer shell 1 after the plate fin assembly 42 is installed into the outer shell 1, thereby effectively sealing the area between the plate fin assembly 42 and the cavity 8. Reference Figure 3 Spring 34 is a compression spring. One end of it abuts against a fixed point on the outer shell 1, and the other end acts on the chuck 32. Through its own stored torsional potential energy, it provides a restoring torque to the chuck 32 so that it always tends to lock.

[0027] The implementation principle of this application embodiment is as follows: During heat exchange, high-temperature hot fluid enters from the inlet pipe 6 and is introduced into the cavity 8 on one side through the guide pipe 5. The fluid is buffered and evenly distributed in the cavity 8, and then flows smoothly into multiple parallel channels composed of plate-fin assembly 41. At the same time, low-temperature cold air flows through another set of channels composed of plate-fin assembly 42. The two fluids flow in their respective channels and undergo efficient heat exchange through partition 411, partition 421, fin 413, and fin 423. The hot fluid is cooled and the cold air is heated. After heat exchange, the hot fluid flows out from the other end of plate-fin assembly 41, collects in the cavity 8 on the other side, and finally exits the heat exchanger from the outlet pipe 7 through the guide pipe 5. During this process, seal 412 ensures that the hot fluid will not leak from the side of the channel, while seal 422 prevents the cold air from entering the cavity 8 and mixing with the hot fluid.

[0028] When cleaning or maintenance of the fin mechanism 4 is required, the operator first presses the button 31 on the outer casing 1. The button 31 then drives the locking head 32 to rotate around its connecting shaft 33, and the head of the locking head 32 disengages from the groove of the cover 2, releasing the lock on the cover 2. At this time, the cover 2 can be removed, and the internal fin mechanism 4, including fin assembly 1 41 and fin assembly 2 42, can be smoothly pulled out from the opening of the outer casing 1. After cleaning, fin assembly 1 41 and fin assembly 2 42 are put back into the inner cavity of the outer casing 1 in sequence, the cover 2 is closed, and the cover 2 is pressed down. The cover 2 will push the inclined surface of the locking head 32 to rotate. When the cover 2 is in place, the locking head 32 automatically rebounds under the elastic force of the spring 34, and its head is locked back into the groove of the cover 2, thus completing the locking. The entire disassembly and assembly process does not require special tools and is easy to operate.

Claims

1. A plate-fin heat exchanger, comprising: The outer shell (1) and the cover (2) define an inner cavity for accommodating the removable plate wing mechanism (4) and an opening for inserting or removing the plate wing mechanism (4), for removably closing the opening of the outer shell (1), and the cover (2) is provided with a groove and a snap-fit ​​mechanism (3) disposed between the outer shell (1) and the cover (2). The buckling mechanism (3) is characterized in that it includes: a button (31), a buckle head (32), a connecting shaft (33) fixed to the outer shell (1), and a spring (34). The locking head (32) is rotatably mounted on the connecting shaft (33). The head of the locking head (32) is adapted to the groove of the cover (2) to achieve locking. The two ends of the spring (34) act on the outer shell (1) and the locking head (32) respectively to apply a torsional force to keep the head of the locking head (32) locked in the groove. One end of the button (31) abuts against the bottom of the locking head (32) to provide a driving force to overcome the elasticity of the spring (34) when pressed, thereby driving the locking head (32) to rotate around the connecting shaft (33) to the unlocked position, so that the head of the locking head (32) disengages from the groove.

2. The plate-fin heat exchanger according to claim 1, characterized in that, The plate wing mechanism (4) includes at least one plate wing assembly (41) and at least one plate wing assembly (42), which are stacked at intervals in the inner cavity of the outer shell (1).

3. The plate-fin heat exchanger according to claim 2, characterized in that, The structure of the plate-fin assembly (41) includes multiple parallel partitions (411) and fins (413) fixedly connected between two adjacent partitions (411). Seals (412) are also fixed at the two side edges of the partitions (411).

4. The plate-fin heat exchanger according to claim 2, characterized in that, The structure of the plate fin assembly 2 (42) includes multiple parallel partition plates 2 (421) and fins 2 (423) fixedly connected between two adjacent partition plates 2 (421). Seals 2 (422) are also fixed at the two side edges of the partition plates 2 (421).

5. The plate-fin heat exchanger according to claim 4, characterized in that, Both sides of the outer shell (1) are provided with cavities (8) as fluid buffers, and a guide pipe (5) connected to the cavity (8) is fixedly connected to the outside of the outer shell (1) to guide the fluid in and out of the cavity (8).

6. The plate-fin heat exchanger according to claim 5, characterized in that, The plate-fin heat exchanger also includes an inlet pipe (6) and an outlet pipe (7), which are respectively connected and fixed to the guide pipe (5) located at different ends of the heat exchanger to form a complete hot fluid circulation loop.

7. The plate-fin heat exchanger according to claim 5, characterized in that, The second seal (422) on the second plate fin assembly (42) is positioned and sized to match the inner wall of the outer shell (1) to effectively seal the area between the second plate fin assembly (42) and the cavity (8) after the second plate fin assembly (42) is installed in the outer shell (1), preventing the two fluids from mixing.

8. The plate-fin heat exchanger according to claim 1, characterized in that, The spring (34) is a compression spring, with one end abutting against a fixed point of the outer shell (1) and the other end acting on the latch (32) to provide a restoring torque that causes it to tend toward the locked position.

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