Tube fin type heat exchanger with adjustable fin spacing

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a fin-tube heat exchanger with adjustable fin spacing, which comprises a heat exchanger shell, a fin moving group, a water inlet pipe and a water outlet pipe, and a plurality of heat exchange tubes mounted on the heat exchanger shell are fixedly connected between the water inlet pipe and the water outlet pipe. A plurality of straight pipe bodies penetrating through the heat exchanger shell are arranged on the heat exchange pipe, a plurality of heat exchange fins are slidably connected to the outer sides of the straight pipe bodies, fin storage shells located on the outer sides of the straight pipe bodies are fixedly connected to the upper side and the lower side of the heat exchanger shell correspondingly, the heat exchange fins can slide into the fin storage shells, and the fin moving set is in transmission connection with the heat exchange fins. The fin moving set comprises a rotating driving set and a rotating rod rotationally connected to the interior of the heat exchanger shell, and the two ends of the rotating rod are rotationally connected to the interiors of the two fin containing shells correspondingly. The heat transfer area and fluid flow characteristics of the heat exchanger can be changed by adjusting the distance between the fins, and the heat exchanger can flexibly adapt to different working conditions.

Description

A tube-fin heat exchanger with adjustable fin spacing Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, specifically relating to a tube-fin heat exchanger with adjustable fin spacing. Background Technology

[0002] Tube-finned heat exchangers are widely used in industrial cooling, HVAC and other fields due to their compact structure and high heat transfer efficiency.

[0003] Traditional tube-fin heat exchangers typically have a fixed fin spacing, meaning their heat transfer area and flow resistance cannot be dynamically adjusted according to actual operating conditions (such as temperature fluctuations and flow rate changes). For example, under low load or high flow rate conditions, fixed, dense fins may lead to excessive pressure drop or heat transfer redundancy, resulting in energy waste; while under high load conditions, sparse fins may cause efficiency reduction due to insufficient heat transfer area. Summary of the Invention

[0004] The purpose of this invention is to provide a tube-fin heat exchanger with adjustable fin spacing, which can change the heat transfer area and fluid flow characteristics of the heat exchanger by adjusting the fin spacing, and flexibly adapt to different working conditions.

[0005] The specific technical solution adopted by this utility model is as follows:

[0006] A tube-fin heat exchanger with adjustable fin spacing includes a heat exchanger shell, an inlet pipe and an outlet pipe. Multiple heat exchange tubes are fixedly connected between the inlet pipe and the outlet pipe and are mounted on the heat exchanger shell. Multiple straight tubes are provided on the heat exchange tubes and penetrate the heat exchanger shell. Multiple heat exchange fins are slidably connected to the outside of the straight tubes.

[0007] The heat exchanger shell is fixedly connected to the upper and lower sides of the shell, and the heat exchange fins can slide into the interior of the fin storage shell.

[0008] The tube-fin heat exchanger also includes a fin moving assembly, which is drivenly connected to the heat exchange fins.

[0009] Furthermore, the fin moving assembly includes a rotary drive assembly and a rotating rod rotatably connected inside the heat exchanger housing. The two ends of the rotating rod are respectively rotatably connected inside the two fin receiving shells. The rotary drive assembly and the rotating rod are connected in a transmission connection.

[0010] The outer side of the rotating rod is fixedly connected with threaded wires near the upper inner wall of the heat exchanger shell and the lower inner wall of the heat exchanger shell, and the two threaded wires are arranged symmetrically.

[0011] The heat exchange fins on the outside of the same straight tube are divided into three groups: upper, middle and lower. The heat exchange fins on the upper group are fixedly connected with a connecting ring that can be threaded to the upper thread. The heat exchange fins on the middle group are fixedly connected with a connecting ring that is slidably connected to the outside of the rotating rod. The heat exchange fins on the lower group are fixedly connected with a connecting ring that can be threaded to the lower thread.

[0012] A composite reset mechanism is fixedly connected between two adjacent heat exchange fins on the outer side of the same straight tube body. The composite reset mechanism is used to apply a thrust that moves the two adjacent heat exchange fins away from each other.

[0013] Furthermore, the composite reset mechanism includes a magnet fixedly connected to the heat exchange fins, and the magnets on two adjacent heat exchange fins repel each other magnetically.

[0014] Furthermore, a linear moving assembly is fixedly connected to the heat exchanger shell, and the same number of positioning pressure plates as the straight tubes are driven connected to the linear moving assembly. The positioning pressure plates are opposite to the straight tubes one by one, and the positioning pressure plates are located on one side of the heat exchange fins on the outside of the straight tubes.

[0015] Furthermore, the positioning plate has several positioning grooves on the side near the heat exchange fins.

[0016] Furthermore, the linear moving assembly includes a moving frame and an electric push rod. An additional housing is fixedly connected to the outside of the heat exchanger housing. The electric push rod is fixedly connected to the additional housing. The moving frame is slidably connected to the inside of the heat exchanger housing. Multiple positioning pressure plates are fixedly connected to the moving frame. The piston rod of the electric push rod is fixedly connected to the moving frame.

[0017] The technical effects achieved by this utility model are as follows:

[0018] This utility model discloses a tube-fin heat exchanger with adjustable fin spacing. By sliding the heat exchange fins, the number of effective fins and the spacing between two adjacent effective fins can be adjusted. By adjusting the fin spacing, the heat transfer area and fluid flow characteristics of the heat exchanger can be changed, flexibly adapting to different working conditions. Attached Figure Description

[0019] Figure 1 is a structural schematic diagram of this utility model;

[0020] Figure 2 is a cross-sectional structural diagram of this utility model;

[0021] Figure 3 is a side view of the cross-sectional structure of this utility model;

[0022] Figure 4 is a partial enlarged view of point A in Figure 2 of this utility model;

[0023] Figure 5 is a structural schematic diagram of the mobile frame of this utility model.

[0024] The attached diagram lists the components represented by each number as follows:

[0025] 1. Heat exchanger shell; 2. Inlet pipe; 3. Outlet pipe; 4. Heat exchange tube; 5. Straight tube body; 6. Magnet; 7. Connecting ring; 8. Heat exchange fins; 9. Rotating rod; 10. Threaded wire; 11. Fin storage shell; 12. Servo motor; 13. Moving frame; 14. Positioning pressure plate; 15. Positioning groove; 16. Additional shell; 17. Electric push rod. Detailed Implementation

[0026] To make the objectives and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the following text is merely used to describe one or more specific embodiments of this utility model and does not strictly limit the scope of protection specifically claimed by this utility model.

[0027] As shown in Figures 1-5, a tube-fin heat exchanger with adjustable fin spacing includes a heat exchanger shell 1, an inlet pipe 2, and an outlet pipe 3. Multiple heat exchange tubes 4 are fixedly connected between the inlet pipe 2 and the outlet pipe 3 and mounted on the heat exchanger shell 1. Multiple straight tube bodies 5 are provided on the heat exchange tubes 4, penetrating the heat exchanger shell 1. Multiple heat exchange fins 8 are slidably connected to the outer side of the straight tube bodies 5. The spacing between the multiple heat exchange fins 8 on the outer side of the straight tube bodies 5 can be adjusted by sliding the heat exchange fins 8. When the hot flow medium enters the heat exchange tube 4 through the inlet pipe 2, it can exchange heat with the fluid flowing inside the heat exchanger shell 1 through the heat exchange fins 8 located on the outer side of the straight tube bodies 5, increasing the heat exchange area. The hot flow medium can be hot water, and the fluid flowing inside the heat exchanger shell 1 can be water or gas.

[0028] The upper and lower sides of the heat exchanger shell 1 are fixedly connected to fin housings 11 located outside the straight tube body 5. The heat exchange fins 8 can slide into the interior of the fin housing 11. At this time, the heat exchange fins 8 located inside the heat exchanger shell 1 are effective fins, and the heat exchange fins 8 located inside the fin housing 11 are ineffective fins. By sliding the heat exchange fins 8, the number of effective fins and the spacing between two adjacent effective fins can be adjusted. By adjusting the fin spacing, the heat transfer area and fluid flow characteristics of the heat exchanger can be changed, flexibly adapting to different working conditions (such as temperature, flow rate, and pressure drop requirements).

[0029] When the effective fin spacing decreases, the number of effective fins per unit volume increases, the heat transfer area increases, and heat transfer is enhanced.

[0030] When the effective fin spacing increases, the fluid channel becomes wider, the pressure drop decreases, and the flow rate increases.

[0031] In order to adjust the heat exchange fins 8 so that they slide on the outside of the straight tube body 5, the tube-fin heat exchanger also includes a fin moving assembly, which is connected to the heat exchange fins 8 in a driving manner to drive the heat exchange fins 8 to move on the outside of the straight tube body 5.

[0032] As shown in Figures 1-4, the fin moving assembly includes a rotary drive assembly and a rotating rod 9 rotatably connected inside the heat exchanger housing 1. The two ends of the rotating rod 9 are rotatably connected inside the two fin receiving shells 11, respectively. The rotary drive assembly and the rotating rod 9 are connected in a transmission connection to drive the rotating rod 9 to rotate.

[0033] Specifically, the rotation drive assembly can be a servo motor 12 fixedly connected to the fin storage shell 11. The servo motor 12 and the rotating rod 9 are opposite each other, and the output end of the servo motor 12 is fixedly connected to the rotating rod 9. At this time, the rotating rod 9 can be driven to rotate by starting the corresponding servo motor 12.

[0034] The rotary drive assembly can also be a combination of a servo motor 12 and a belt drive assembly. The servo motor 12 is connected to multiple rotating rods 9 via the belt drive assembly, thereby enabling the multiple rotating rods 9 to rotate synchronously.

[0035] Threaded wires 10 are fixedly connected to the outer side of the rotating rod 9 near the upper inner wall of the heat exchanger shell 1 and the lower inner wall of the heat exchanger shell 1. The two threaded wires 10 are symmetrically arranged, that is, the thread directions of the two threaded wires 10 are opposite.

[0036] The heat exchange fins 8 on the outside of the same straight tube 5 are divided into three groups: upper, middle and lower. The heat exchange fins 8 on the upper side are fixedly connected with a connecting ring 7 that can be threaded to the upper threaded wire 10. The heat exchange fins 8 on the middle side are fixedly connected with a connecting ring 7 that is slidably connected to the outside of the rotating rod 9. The heat exchange fins 8 on the lower side are fixedly connected with a connecting ring 7 that can be threaded to the lower threaded wire 10.

[0037] Meanwhile, a composite reset mechanism is fixedly connected between two adjacent heat exchange fins 8 on the outside of the same straight tube body 5. The composite reset mechanism is used to apply a mutual pushing force to the two adjacent heat exchange fins 8.

[0038] The composite reset mechanism can be a magnetic reset mechanism or a spring reset mechanism. The magnetic reset mechanism, as shown in Figures 2-4, includes a magnet 6 fixedly connected to the heat exchange fins 8. The magnets 6 on two adjacent heat exchange fins 8 repel each other magnetically, thus applying a repulsive force to the two adjacent heat exchange fins 8 to move them away from each other. The spring reset mechanism can be a spring fixedly connected between two adjacent heat exchange fins 8, through which a pushing force can be applied to the two adjacent heat exchange fins 8 to move them away from each other.

[0039] During the adjustment of the heat exchange fins 8, the heat exchange fins 8 are moved by the composite reset mechanism, so that the heat exchange fins 8 near the threaded wire 10 abut against the threaded wire 10. At this time, by rotating the rotating rod 9, the heat exchange fins 8 on the outside of the rotating rod 9 can be moved by the threaded wire 10. This movement of the heat exchange fins 8 will cause the heat exchange fins 8 inside the heat exchanger shell 1 to move into the fin housing 11, or cause the heat exchange fins 8 inside the fin housing 11 to move into the heat exchanger shell 1, thereby controlling the number of effective fins. After the number of effective fins is adjusted, the effective fins will be automatically evenly distributed inside the heat exchanger shell 1 under the action of the composite reset mechanism.

[0040] To enhance the locking stability of the heat exchange fins 8 after they have moved, a linear moving assembly is fixedly connected to the heat exchanger shell 1. The linear moving assembly is connected to a number of positioning plates 14, the same as the number of straight tubes 5. The positioning plates 14 are opposite to the straight tubes 5 and are located on one side of the heat exchange fins 8 outside the straight tubes 5. After the heat exchange fins 8 have moved, the positioning plates 14 are moved by the linear moving assembly so that they abut against the effective fins, thereby locking the effective fins.

[0041] The positioning plate 14 can have several positioning grooves 15 on the side near the heat exchange fin 8. When the positioning plate 14 and the heat exchange fin 8 abut, the positioning grooves 15 abut against the edge of the heat exchange fin 8 to position the heat exchange fin 8 and reduce the displacement of the heat exchange fin 8 under fluid impact. Thus, the positioning grooves 15 can improve the fixing stability of the heat exchange fin 8.

[0042] The linear moving assembly includes a moving frame 13 and an electric push rod 17. An additional housing 16 is fixedly connected to the outside of the heat exchanger housing 1. The electric push rod 17 is fixedly connected to the additional housing 16. The moving frame 13 is slidably connected to the inside of the heat exchanger housing 1. Multiple positioning plates 14 are fixedly connected to the moving frame 13. The piston rod of the electric push rod 17 is fixedly connected to the moving frame 13. At this time, by starting the electric push rod 17, the moving frame 13 can be moved, thereby synchronously moving the multiple positioning plates 14.

[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model, unless otherwise specified or limited, shall be implemented using conventional methods in the field.

Claims

1. A tube-fin heat exchanger with adjustable fin spacing, characterized in that: The heat exchanger includes a heat exchanger shell (1), an inlet pipe (2), and an outlet pipe (3). Multiple heat exchange tubes (4) are fixedly connected between the inlet pipe (2) and the outlet pipe (3) and are mounted on the heat exchanger shell (1). Multiple straight tubes (5) are provided on the heat exchange tubes (4) and penetrate the heat exchanger shell (1). Multiple heat exchange fins (8) are slidably connected to the outside of the straight tubes (5). Fin housing shells (11) located outside the straight tubes (5) are fixedly connected to the upper and lower sides of the heat exchanger shell (1). The heat exchange fins (8) can slide into the interior of the fin housing shell (11). The tube-fin heat exchanger also includes a fin moving assembly, which is connected to the heat exchange fins (8) in a driving manner.

2. A tube-fin heat exchanger with adjustable fin spacing according to claim 1, characterized in that: The fin moving assembly includes a rotary drive assembly and a rotating rod (9) rotatably connected inside the heat exchanger housing (1). The two ends of the rotating rod (9) are rotatably connected inside two fin receiving shells (11), and the rotary drive assembly and the rotating rod (9) are connected in a transmission connection. Threaded wires (10) are fixedly connected to the outer side of the rotating rod (9) near the upper inner wall and the lower inner wall of the heat exchanger housing (1), and the two threaded wires (10) are symmetrically arranged. The heat exchange fins (8) on the outer side of the same straight tube (5) are divided into three groups: upper, middle, and lower. The upper group is... A connecting ring (7) that can be threaded to the upper threaded wire (10) is fixedly connected to the heat exchange fins (8). A connecting ring (7) that is slidably connected to the outside of the rotating rod (9) is fixedly connected to a group of heat exchange fins (8) located in the middle position. A connecting ring (7) that can be threaded to the lower threaded wire (10) is fixedly connected to a group of heat exchange fins (8) located on the lower side. A composite reset mechanism is fixedly connected between two adjacent heat exchange fins (8) on the outside of the same straight tube body (5). The composite reset mechanism is used to apply a thrust that moves away from each other to the two adjacent heat exchange fins (8).

3. A tube-fin heat exchanger with adjustable fin spacing according to claim 2, characterized in that: The composite reset mechanism includes a magnet (6) fixedly connected to the heat exchange fins (8), and the magnets (6) on two adjacent heat exchange fins (8) are magnetically repulsive.

4. A tube-fin heat exchanger with adjustable fin spacing according to claim 2, characterized in that: A linear moving assembly is fixedly connected to the heat exchanger shell (1). The linear moving assembly is connected to a number of positioning plates (14) equal to the number of straight tubes (5). The positioning plates (14) are opposite to the straight tubes (5) and are located on one side of the heat exchange fins (8) outside the straight tubes (5).

5. A tube-fin heat exchanger with adjustable fin spacing according to claim 4, characterized in that: The positioning plate (14) has several positioning grooves (15) on the side near the heat exchange fins (8).

6. A tube-fin heat exchanger with adjustable fin spacing according to claim 4, characterized in that: The linear moving assembly includes a moving frame (13) and an electric push rod (17). An additional housing (16) is fixedly connected to the outside of the heat exchanger housing (1). The electric push rod (17) is fixedly connected to the additional housing (16). The moving frame (13) is slidably connected to the inside of the heat exchanger housing (1). Multiple positioning plates (14) are fixedly connected to the moving frame (13). The piston rod of the electric push rod (17) is fixedly connected to the moving frame (13).

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