A heat exchanger

Abstract

The utility model discloses a heat exchanger, including two vertical first heat exchange box and second heat exchange box that set up, the upper end of first heat exchange box is provided with the upper cover, and the upper cover is provided with cold air import, and the upper end of second heat exchange box is also provided with the upper cover, and the upper cover is provided with hot air export, and the lower end of first heat exchange box and second heat exchange box is provided with the communicating part, and the upper and lower end of first heat exchange box and second heat exchange box all is provided with the base plate, and the heat exchange pipe is installed correspondingly between the upper and lower base plate, and the upper and lower end of heat exchange pipe correspond to pass through the upper and lower base plate. The inner fin is arranged in the heat exchange pipe in the first heat exchange box in the device, and the heat exchange pipe in the second heat exchange box is arranged into the zigzag shape structure, can all effectively increase the heat exchange area of heat exchange pipe, and effectively increase the heat exchange efficiency and heat exchange quality.

Description

Technical Field

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

[0002] In the prior art, a heat exchanger is a device that transfers part of the heat from a hot fluid to a cold fluid. Its main function is to transfer heat from a higher-temperature fluid to a lower-temperature fluid, so that the fluid temperature reaches the specified index of the process to meet the requirements of the process conditions. It is also one of the main devices for improving energy utilization efficiency.

[0003] The main working principles of existing heat exchangers can be broadly divided into two types: conduction heat transfer, which refers to the process of heat transfer within a material through molecular vibration. For example, in a shell-and-tube heat exchanger, heat is transferred from the fluid inside the tube to the fluid outside the tube through the tube wall. The other type is convection heat transfer, which is the process of heat transfer within a fluid through flow. In a heat exchanger, the flow of fluid inside or outside the tube drives heat transfer, exchanging heat with the tube wall. In practical applications, these two heat transfer methods often coexist and influence each other.

[0004] Furthermore, existing heat exchangers can be classified according to type and principle into indirect heat exchangers, regenerative heat exchangers, fluid-connected indirect heat exchangers, direct contact heat exchangers, and compound heat exchangers, all of which have good heat exchange effects. Moreover, existing heat exchangers mostly use heat exchange tubes as the main heat exchange structure to achieve the heat exchange function. For example, the "heat exchanger assembly" disclosed in CN107514841B, the "a kind of heat exchanger" disclosed in CN104315893A, and the "plate heat exchanger" disclosed in CN106767049A all use heat exchange tubes as the main body.

[0005] However, the structural design of heat exchange tubes in existing technologies is relatively common and ordinary. In particular, the heat exchange area of ​​heat exchange tubes is usually fixed in the heat exchanger. If the heat exchange area of ​​heat exchange tubes cannot be effectively increased, the heat exchange efficiency and quality of the heat exchanger will be affected.

[0006] Therefore, in order to solve the above problems, it is necessary to develop a heat exchanger with a reasonable structure that can effectively improve heat exchange efficiency and heat exchange quality. Utility Model Content

[0007] The purpose of this invention is to address the shortcomings of existing technologies by providing a heat exchanger; the technical solution is as follows:

[0008] A heat exchanger includes two vertically arranged first heat exchange boxes and second heat exchange boxes. The upper end of the first heat exchange box is provided with a top cover and a cold air inlet is provided at the top cover. The upper end of the second heat exchange box is also provided with a top cover and a hot air outlet is provided at the top cover. The lower ends of the first heat exchange box and the second heat exchange box are provided with a connecting part. The upper and lower ends of the first heat exchange box and the second heat exchange box are provided with base plates, and heat exchange tubes are installed between the upper and lower base plates. The upper and lower ends of the heat exchange tubes pass through the upper and lower base plates respectively.

[0009] The heat exchange tubes are evenly arranged between the upper and lower substrates, and a flow area of ​​heat exchange medium is formed between adjacent heat exchange tubes. After the cold air enters the cold air inlet at the upper end of the first heat exchange box, it exchanges heat with the heat exchange medium passing between the adjacent heat exchange tubes, and then enters the hot air outlet at the upper end of the second heat exchange box from the connecting part at the lower end and is discharged.

[0010] The heat exchange tubes in the first heat exchange box are equipped with removable and replaceable inner fins, while the heat exchange tubes in the second heat exchange box are configured in a tortuous shape.

[0011] Furthermore, the inner fins are elongated wavy structures, and the inner fins are placed inside the heat exchange tube and are not fixedly connected to the inner wall of the heat exchange tube.

[0012] Furthermore, an annular baffle is provided at the bottom of the heat exchange tube in the first heat exchange box. The inner fins in the heat exchange tube are placed in the heat exchange tube accordingly. After the bottom of the inner fins is blocked by the annular baffle, they are placed in the heat exchange tube accordingly.

[0013] Furthermore, the top covers of both the first and second heat exchange boxes can be removed.

[0014] Furthermore, a connecting rod is installed at the upper end of the inner fins of each heat exchange tube in the first heat exchange box. The connecting rod extends from the upper end of the heat exchange tube, and a crossbar is installed at the end of the connecting rod.

[0015] Furthermore, the crossbar will not affect the air entering the heat exchange tube. After the upper cover is removed, the inner fins in the heat exchange tube can be pulled out and replaced by using the crossbar.

[0016] Furthermore, in the second heat exchange box, the heat exchange tubes in the same row have a bend design in the same direction, while the heat exchange tubes in adjacent rows have a bend design in opposite directions.

[0017] Furthermore, a U-shaped partition plate is provided on the inner side of the connecting part, which divides the area of ​​the connecting part into upper and lower channels.

[0018] Beneficial effects: This utility model has the following beneficial effects:

[0019] 1) In this device, the heat exchange tubes in the first heat exchange box are equipped with internal fins, and the heat exchange tubes in the second heat exchange box are designed with a tortuous shape. Both of these can effectively increase the heat exchange area of ​​the heat exchange tubes, thereby effectively increasing the heat exchange efficiency and heat exchange quality.

[0020] 2) In this device, the inner fins inside the heat exchange tubes in the first heat exchange box are designed to be replaceable, rather than welded and fixed. This allows for replacement of the inner fins in the event of corrosion, thereby increasing the heat exchange efficiency of the heat exchange tubes. The structure is reasonable.

[0021] 3) An annular baffle is installed at the bottom of the heat exchange tube in this device. The inner fins are placed after the heat exchange tube and will be blocked by the annular baffle. When replacing, the top cover can be opened to replace them. The structure is reasonably designed.

[0022] 4) A vertical rod is also installed at the upper end of the annular block in this device, and a horizontal rod is installed at the upper end of the vertical rod. When replacing, the entire inner fin can be lifted directly through the horizontal rod, and the inner fin can be lifted out directly, making the replacement of the inner fin very convenient. Attached Figure Description

[0023] Figure 1 This is a structural diagram of the present utility model;

[0024] Figure 2 for Figure 1 Top view;

[0025] Figure 3 for Figure 1 Left side view;

[0026] Figure 4 This is a diagram showing the installation of the inner fins in this utility model;

[0027] Figure 5 This is a diagram showing the installation positions of the vertical and horizontal bars in this utility model;

[0028] Figure 6 This is a diagram of the tortuous heat exchange tube structure in the second heat exchange box;

[0029] Figure 7 Diagram of the internal fin structure;

[0030] The components include: a first heat exchange box 1; a second heat exchange box 2; a top cover 3; a cold air inlet 4; a hot air outlet 5; a connecting part 6; a base plate 7; a heat exchange tube 8; inner fins 9; an annular baffle 10; a connecting rod 11; a crossbar 12; and a partition plate 13. Detailed Implementation

[0031] The present invention will be further explained below with reference to the accompanying drawings and specific embodiments. These embodiments are implemented under the premise of the technical solution of the present invention. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention.

[0032] like Figure 1 and Figure 2 As shown, a heat exchanger includes two vertically arranged first heat exchange boxes 1 and second heat exchange boxes 2. The upper end of the first heat exchange box 1 is provided with a top cover 3, and a cold air inlet 4 is provided at the top cover 3. The upper end of the second heat exchange box 2 is also provided with a top cover 3, and a hot air outlet 5 is provided at the top cover 3. The lower ends of the first heat exchange box 1 and the second heat exchange box 2 are provided with a connecting part 6. The upper and lower ends of the first heat exchange box 1 and the second heat exchange box 2 are both provided with a base plate 7, and a heat exchange tube 8 is installed between the upper and lower base plates 7. The upper and lower ends of the heat exchange tube 8 pass through the upper and lower base plates 7 respectively.

[0033] like Figure 3 As shown, heat exchange tubes 8 are evenly arranged between the upper and lower substrates 7, and a flow area for heat exchange medium is formed between adjacent heat exchange tubes 8. After the cold air enters the cold air inlet 4 at the upper end of the first heat exchange box 1, it exchanges heat with the heat exchange medium passing between the adjacent heat exchange tubes 8, and then enters the hot air outlet 5 at the upper end of the second heat exchange box 2 from the connecting part 6 at the lower end and is discharged.

[0034] like Figure 6 As shown, the heat exchange tube 8 in the first heat exchange box 1 is also equipped with removable and replaceable inner fins 9, and the heat exchange tube 8 in the second heat exchange box 2 is set in a tortuous shape.

[0035] like Figure 4 and Figure 7 As shown, the inner fin 9 has a long, wavy structure and is placed inside the heat exchange tube 8, without being fixedly connected to the inner wall of the heat exchange tube 8.

[0036] In the first heat exchange box 1, an annular baffle 10 is also provided at the bottom of the heat exchange tube 8. The inner fins 9 in the heat exchange tube 8 are placed in the heat exchange tube 8. After the bottom of the inner fins 9 is blocked by the annular baffle 10, they are placed in the heat exchange tube 8.

[0037] The top cover 3 of both the first heat exchange box 1 and the second heat exchange box 2 can be removed.

[0038] like Figure 5 As shown, in the first heat exchange box 1, the upper end of the inner fin 9 of each heat exchange tube 8 is also equipped with a connecting rod 11. The connecting rod 11 extends from the upper end of the heat exchange tube 8, and a crossbar 12 is also installed at the end of the connecting rod 11.

[0039] The crossbar 12 will not affect the air entering the heat exchange tube 8. After removing the upper cover 3, the inner fins 9 in the heat exchange tube 8 can be pulled out and replaced by using the crossbar 12.

[0040] In the second heat exchange box 2, the heat exchange tubes 8 in the same row have a bend design in the same direction, while the heat exchange tubes 8 in adjacent rows have a bend design in opposite directions.

[0041] The inner side of the connecting part 6 is also provided with a U-shaped partition plate 13, which divides the area of ​​the connecting part 6 into upper and lower channels.

[0042] The specific structure and working principle of the heat exchanger in this device are as follows: This device mainly consists of two heat exchange boxes, which are connected at their bottoms by a connecting part. The upper end of the first heat exchange box is provided with a cold air inlet, and the upper end of the second heat exchange box is provided with a hot air outlet. Both heat exchange boxes are equipped with heat exchange tubes, and the area between the heat exchange tubes is set as a flow area for another heat exchange medium. When the cold air enters the first heat exchange box, it flows through the heat exchange tubes and then through the connecting part into the heat exchange tubes of the second heat exchange box, where it exchanges heat with the heat exchange medium and becomes hot air before being discharged from the hot air outlet, thus completing the overall heat exchange process.

[0043] Furthermore, in order to increase the heat exchange efficiency of the heat exchange tubes in the two heat exchange boxes of this device, the heat exchange tubes in the first heat exchange box are equipped with internal fins, and the heat exchange tubes in the second heat exchange box are designed with a tortuous shape. The internal fins inside the heat exchange tubes can effectively increase the heat exchange area. After the cold air enters the heat exchange tubes, it will come into contact with the internal fins, thereby increasing the heat exchange efficiency. Moreover, the tortuous shape of the heat exchange tubes is longer than that of the vertical heat exchange tubes, and the air has a longer path in the heat exchange tubes, which increases the flow time and can also effectively improve the heat exchange efficiency.

[0044] In existing technologies, some heat exchange tubes also have structures with internal fins installed. However, the internal fins are basically fixed inside the heat exchange tube by welding. However, after long-term use, and with the introduction of gases such as flue gas into many heat exchange tubes, the internal fins are prone to corrosion, which will seriously affect the heat exchange efficiency of the heat exchange tube. However, since the internal fins in existing heat exchange tubes are welded, the internal fins cannot be replaced, or replacement requires replacing the entire heat exchange tube, increasing costs and making it not worthwhile.

[0045] Furthermore, this device features a detachable internal fin structure within the heat exchange tube. The internal fins are not fixedly installed within the heat exchange tube but are instead placed directly within it. An annular stop is located at the lower end of the heat exchange tube. When the internal fins are placed within the tube, their lower ends are blocked by this stop, ensuring proper placement. This structure does not affect airflow or heat exchange efficiency. If corrosion occurs, the top cover can be opened, and the internal fins can be removed and replaced, effectively increasing heat exchange efficiency.

[0046] Furthermore, to facilitate the replacement of the internal fins inside the heat exchange tube, this device has a vertical rod installed at the upper end of the internal fins, with a corresponding horizontal bar installed at the upper end of the vertical rod. When replacing the fins, simply grasp the horizontal bar and pull upwards to remove the entire internal fin from the heat exchange tube, and then insert the new internal fin. The replacement of the internal fins is very convenient and will not affect the airflow and heat exchange of the heat exchange tube at all, making it extremely convenient.

[0047] The above-described specific embodiments are merely preferred embodiments of this utility model and are not intended to limit the implementation of this utility model or the scope of the claims. All equivalent changes and modifications made in accordance with the scope of protection of this utility model patent application should be included within the scope of this utility model patent application.

Claims

1. A heat exchanger, characterized in that: The device includes two vertically arranged heat exchange boxes, a first heat exchange box (1) and a second heat exchange box (2). The first heat exchange box (1) is provided with a top cover (3) at its upper end, and a cold air inlet (4) is provided at the top cover (3). The second heat exchange box (2) is also provided with a top cover (3) at its upper end, and a hot air outlet (5) is provided at the top cover (3). The first heat exchange box (1) and the second heat exchange box (2) are provided with a connecting part (6) at their lower ends. The first heat exchange box (1) and the second heat exchange box (2) are provided with base plates (7) at their upper and lower ends, and heat exchange tubes (8) are installed between the upper and lower base plates (7). The upper and lower ends of the heat exchange tubes (8) pass through the upper and lower base plates (7) respectively. The heat exchange tubes (8) are evenly arranged between the upper and lower substrates (7), and a flow area of ​​heat exchange medium is formed between adjacent heat exchange tubes (8). After the cold air enters the cold air inlet (4) at the upper end of the first heat exchange box (1), it exchanges heat with the heat exchange medium passing between the adjacent heat exchange tubes (8), and then enters the hot air outlet (5) at the upper end of the second heat exchange box (2) from the connecting part (6) at the lower end and is discharged. The heat exchange tube (8) in the first heat exchange box (1) is also equipped with a removable and replaceable inner fin (9), and the heat exchange tube (8) in the second heat exchange box (2) is configured in a tortuous shape.

2. A heat exchanger according to claim 1, characterized in that: The inner fins (9) are long, wavy structures, and the inner fins (9) are placed inside the heat exchange tube (8) and are not fixedly connected to the inner wall of the heat exchange tube (8).

3. A heat exchanger according to claim 2, characterized in that: The bottom of the heat exchange tube (8) in the first heat exchange box (1) is also provided with an annular baffle (10). The inner fins (9) in the heat exchange tube (8) are placed in the heat exchange tube (8). After the bottom of the inner fins (9) is blocked by the annular baffle (10), they are placed in the heat exchange tube (8).

4. A heat exchanger according to claim 3, characterized in that: The top cover (3) of the first heat exchange box (1) and the second heat exchange box (2) can both be removed.

5. A heat exchanger according to claim 4, characterized in that: In the first heat exchange box (1), the upper end of the inner fins (9) of each heat exchange tube (8) is also equipped with a connecting rod (11), the connecting rod (11) extends from the upper end of the heat exchange tube (8), and the rod end of the connecting rod (11) is also equipped with a crossbar (12).

6. A heat exchanger according to claim 5, characterized in that: The setting of the crossbar (12) will not affect the air entering the heat exchange tube (8). After the upper cover (3) is removed, the inner fins (9) in the heat exchange tube (8) can be pulled out and replaced by the setting crossbar (12).

7. A heat exchanger according to claim 1, characterized in that: In the second heat exchange box (2), the heat exchange tubes (8) in the same row are designed with bends in the same direction, while the heat exchange tubes (8) in two adjacent rows are designed with bends in opposite directions.

8. A heat exchanger according to claim 1, characterized in that: The inner side of the connecting part (6) is also provided with a U-shaped partition plate (13), which divides the area of ​​the connecting part (6) into upper and lower channels.

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