High pressure tube fin heat exchanger

Abstract

A high-pressure tube-fin heat exchanger includes: heat exchange tubes arranged in a serpentine pattern; multiple heat exchange fins spaced apart on the heat exchange tubes, forming heat exchange channels between adjacent heat exchange fins; and a first arc-shaped fin and a second arc-shaped fin, alternately fixed to the inner wall of the heat exchange channels. The first arc-shaped fin has a convex direction opposite to that of the second arc-shaped fin, and the tangential extension lines of each arc-shaped fin intersect with adjacent heat exchange fins, creating a continuous tortuous gas flow path. This invention features a novel structure and ingenious design. The first and second arc-shaped fins within the heat exchange channel have opposite convex directions, and the tangential extension lines of each arc-shaped fin intersect with adjacent heat exchange fins, forming a continuous tortuous gas flow path. This forces the gas to continuously change its flow direction, greatly increasing the contact time and contact area between the gas and the heat exchange fins and arc-shaped fins.

Description

Technical Field

[0001] This utility model relates to heat exchangers, specifically a high-pressure tube-fin heat exchanger. Background Technology

[0002] In many fields such as industrial production, energy utilization, and daily life, heat exchange between liquids and gases is a common process, and its heat exchange efficiency directly affects the energy consumption, operating costs, and performance of the entire system. Currently, most commonly used liquid-gas heat exchange equipment on the market adopts a structural design of straight tube heat exchange tubes combined with flat fins. Such equipment has many limitations in practical applications.

[0003] On the one hand, regarding the liquid side, the heat exchange channels formed by the straight fins on the gas side are often relatively straight. When the gas flows through, it is mostly in a laminar flow state, with limited contact area and short contact time with the fins, which easily leads to uneven local heat exchange. At the same time, the gas flow is stable in the laminar flow state, the fluid mixing effect is poor, and the heat transfer rate is slow, which further restricts the improvement of heat exchange efficiency. Utility Model Content

[0004] In view of the above situation and to overcome the defects of the prior art, this utility model provides a high-pressure tube-fin heat exchanger, which effectively solves the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: This utility model includes:

[0006] The heat exchange tubes are arranged in a serpentine pattern.

[0007] Multiple heat exchange fins are spaced apart on the heat exchange tube, and heat exchange channels are formed between adjacent heat exchange fins;

[0008] The first arc-shaped fin and the second arc-shaped fin are alternately fixed to the inner wall of the heat exchange channel;

[0009] The first arc-shaped wing has a convex direction opposite to that of the second arc-shaped wing, and the tangential extension of each arc-shaped wing intersects with the adjacent heat exchange wing, thus forming a continuous tortuous path for the gas flow channel.

[0010] Preferably, the tangents of the first and second arc-shaped wings form an angle of 30°-60° with the heat exchange wing.

[0011] Preferably, the first arc-shaped wing and the second arc-shaped wing are arranged alternately in the airflow direction.

[0012] Preferably, the cross-sections of the first and second arc-shaped wings are elliptical arcs, and the angle θ between the major axis of the ellipse and the airflow direction satisfies: 15°≤θ≤75°.

[0013] Preferred options also include:

[0014] The liquid inlet is located at one end of the heat exchange tube;

[0015] The drain outlet is located at the other end of the heat exchange tube.

[0016] Preferably, the thickness of the first arc-shaped wing and the second arc-shaped wing decreases from the root to the end, and the root thickness δ1 and the end thickness δ2 satisfy: δ1 / δ2≥1.5.

[0017] Beneficial effects: Increases gas contact time and area, enhancing heat exchange effect: The first and second arc-shaped fins in the heat exchange channel have opposite convex directions, and the tangential extension lines of each arc-shaped fin intersect with the adjacent heat exchange fins, forming a continuous and tortuous gas flow channel, which forces the gas to constantly change its flow direction, greatly increasing the contact time and contact area between the gas and the heat exchange fins and arc-shaped fins. Attached Figure Description

[0018] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0019] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model;

[0020] Figure 2 This is a two-dimensional structural schematic diagram of the present invention from a second perspective;

[0021] Figure 3 This is a utility model Figure 2 A magnified schematic diagram of the structure of part A in the diagram;

[0022] Figure 4 This is the front view of this utility model;

[0023] Figure 5 This is a utility model Figure 4 A schematic diagram of the structure of B in the middle;

[0024] The diagram is labeled as follows: 1. Heat exchange tube; 2. Heat exchange fin; 21. First arc-shaped fin; 22. Second arc-shaped fin; 3. Liquid inlet; 4. Liquid outlet. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1-5 The specific embodiments of this utility model will be described in further detail.

[0026] Example 1, by Figure 1-5 This utility model provides a high-pressure tube-fin heat exchanger, comprising:

[0027] Heat exchange tube 1 is arranged in a serpentine pattern;

[0028] Multiple heat exchange fins 2 are spaced apart on the heat exchange tube 1, and heat exchange channels are formed between adjacent heat exchange fins 2;

[0029] The first arc-shaped wing 21 and the second arc-shaped wing 22 are alternately fixed to the inner wall of the heat exchange channel;

[0030] The first arc-shaped wing 21 has a convex direction opposite to that of the second arc-shaped wing 22, and the tangential extension line of each arc-shaped wing intersects with the adjacent heat exchange wing 2, so that the gas flow channel forms a continuous tortuous path.

[0031] Heat exchanger tube 1: Heat exchanger tube 1 adopts a serpentine layout. This layout increases the contact area between the heat exchanger tube and the fluid, and extends the flow path of the fluid within the heat exchanger tube, thereby helping to improve the heat exchange effect. The serpentine structure can better adapt to the internal space of the equipment, achieving a larger heat exchange area within a limited space.

[0032] Heat exchange fins 2: Multiple heat exchange fins 2 are spaced apart on the heat exchange tube 1, forming heat exchange channels between adjacent heat exchange fins 2. The presence of heat exchange fins 2 further increases the heat exchange area of ​​the heat exchanger. When the fluid flows through the heat exchange channel, it can fully contact the heat exchange fins 2 to exchange heat, thereby improving the heat exchange efficiency.

[0033] The first arc-shaped fin 21 and the second arc-shaped fin 22 are alternately fixed to the inner wall of the heat exchange channel. This alternating fixing method creates a continuous tortuous path for the gas flow channel. When the gas flows in the channel, it will constantly change its flow direction, increasing the contact time and contact area between the gas and the arc-shaped fins and the heat exchange fins, thereby enhancing the heat exchange effect. In addition, the changing airflow direction will impact the heat exchange fins 2, preventing dust from accumulating on the heat exchange fins 2.

[0034] Specifically, the tangents of the first arc-shaped fin 21 and the second arc-shaped fin 22 form an angle of 30°-60° with the heat exchange fin 2. This angle design helps guide the flow of gas within the flow channel, allowing the gas to contact the heat exchange components more evenly and avoiding insufficient local heat exchange.

[0035] Specifically, the first arc-shaped fin 21 and the second arc-shaped fin 22 are arranged alternately in the airflow direction. This alternating arrangement further disrupts the gas flow state, causing more turbulence to be generated during the gas flow. The fluid in the turbulent state mixes more thoroughly, heat transfer is more rapid, and heat exchange efficiency is improved.

[0036] Specifically, the cross-sections of the first arc-shaped fin 21 and the second arc-shaped fin 22 are elliptical arcs, and the angle θ between the major axis of the ellipse and the airflow direction satisfies: 15°≤θ≤75°. The elliptical arc cross-section design and the specific angle setting can optimize the flow resistance of the gas in the flow channel, while ensuring good heat exchange effect, so that the gas can fully exchange heat during the flow process without generating excessive energy loss.

[0037] Specifically, the thickness of the first arc-shaped fin 21 and the second arc-shaped fin 22 decreases from the root to the tip, with the root thickness δ1 and the tip thickness δ2 satisfying: δ1 / δ2≥1.5. This thickness variation design ensures the strong connection between the arc-shaped fin and the inner wall of the heat exchange channel, provides sufficient support strength due to the thicker root thickness, reduces the overall weight of the arc-shaped fin, and facilitates heat transfer by being thinner at the tip, thus improving heat exchange efficiency.

[0038] Liquid inlet 3 and liquid outlet 4: Liquid inlet 3 is located at one end of heat exchange tube 1 and is used to introduce the liquid to be heat exchanged into the heat exchange tube.

[0039] The drain port 4 is located at the other end of the heat exchange tube 1 and is used to drain the liquid after heat exchange is completed from the heat exchange tube.

[0040] Working principle: In use, the liquid to be heated enters the serpentine heat exchange tube 1 through the inlet 3. Utilizing the extended flow path created by the serpentine structure, the liquid flows freely within the tube. Simultaneously, the gas requiring heat exchange enters the heat exchange channel formed by multiple spaced heat exchange fins 2.

[0041] During the gas flow through the heat exchange channel, the alternating fixed first arc-shaped fins 21 and second arc-shaped fins 22 on the inner wall of the channel play a crucial role. Because their protrusions are in opposite directions, and the tangential extensions of each arc-shaped fin intersect with adjacent heat exchange fins 2, the gas flow channel forms a continuous tortuous path. This design forces the gas to constantly change its flow direction, greatly increasing the contact time and contact area between the gas and the heat exchange fins 2 and the arc-shaped fins.

[0042] Among them, the tangents of the first arc-shaped fin 21 and the second arc-shaped fin 22 form an angle of 30°-60° with the heat exchange fin 2, which can guide the gas to contact the heat exchange component more evenly and avoid insufficient local heat exchange; the staggered arrangement of the two in the airflow direction further disrupts the gas flow state, generates more turbulence, promotes fluid mixing, and accelerates heat transfer; if it is an elliptical arc, the cross-sectional design of the elliptical arc and the included angle setting of 15°≤θ≤75° optimize the flow resistance while ensuring the heat exchange effect; the design of the thickness decreasing from the root to the end and δ1 / δ2≥1.5 ensures the connection is firm and facilitates heat transfer, thereby improving the heat exchange efficiency.

[0043] During this process, the liquid inside the heat exchange tube 1 and the gas inside the heat exchange channel exchange heat through the tube wall, heat exchange fins 2, and arc-shaped fins. After heat exchange, the liquid is discharged through the drain port 4 at the other end of the heat exchange tube 1, while the gas flows out of the heat exchange channel, thus achieving efficient heat exchange between the liquid and the gas.

[0044] Extending the liquid flow path and improving heat exchange efficiency: By using the serpentine heat exchange tube 1, the flow path of the liquid to be exchanged is extended, allowing the liquid to flow fully within the tube, creating more favorable conditions for heat exchange.

[0045] Increasing gas contact time and area enhances heat transfer efficiency.

[0046] The first arc-shaped fin 21 and the second arc-shaped fin 22 in the heat exchange channel have opposite convex directions, and the tangential extension lines of each arc-shaped fin intersect with the adjacent heat exchange fin 2, forming a continuous and tortuous gas flow channel, which forces the gas to constantly change its flow direction, greatly increasing the contact time and contact area between the gas and the heat exchange fin 2 and the arc-shaped fin.

[0047] The tangent of the arc-shaped fin forms an angle of 30°-60° with the heat exchange fin 2, which can guide the gas to contact the heat exchange components more evenly and avoid insufficient local heat exchange.

[0048] Promoting turbulence and fluid mixing to accelerate heat transfer: The staggered arrangement of the first arc-shaped fin 21 and the second arc-shaped fin 22 in the airflow direction further disrupts the gas flow state, generates more turbulence, promotes fluid mixing, and thus accelerates heat transfer.

[0049] Optimize flow resistance and balance heat exchange efficiency and energy consumption: If the arc-shaped fin is an elliptical arc, its cross-sectional design and the included angle setting of 15°≤θ≤75° can optimize gas flow resistance while ensuring good heat exchange effect, thus achieving a balance between heat exchange efficiency and energy consumption.

[0050] Balancing connection strength and heat transfer performance: The design of the arc-shaped fin thickness decreasing from the root to the end and δ1 / δ2≥1.5 ensures the connection between the arc-shaped fin and the heat exchange fin 2, while also facilitating heat transfer and further improving the overall heat exchange efficiency.

[0051] Achieving efficient heat exchange between liquid and gas: Through the above structural design, the liquid in the heat exchange tube 1 and the gas in the heat exchange channel can exchange heat efficiently through various components, ultimately achieving efficient heat exchange between liquid and gas.

[0052] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-pressure tube-fin heat exchanger, characterized in that: include: The heat exchange tubes (1) are arranged in a serpentine pattern; Multiple heat exchange fins (2) are spaced apart on the heat exchange tube (1), and heat exchange channels are formed between adjacent heat exchange fins (2); The first arc-shaped fin (21) and the second arc-shaped fin (22) are alternately fixed to the inner wall of the heat exchange channel; The first arc-shaped wing (21) has a convex direction opposite to that of the second arc-shaped wing (22), and the tangential extension of each arc-shaped wing intersects with the adjacent heat exchange wing (2), so that the gas flow channel forms a continuous tortuous path.

2. A high-pressure tube-fin heat exchanger according to claim 1, characterized in that: The tangents of the first arc-shaped wing (21) and the second arc-shaped wing (22) form an angle of 30°-60° with the heat exchange wing (2).

3. A high-pressure tube-fin heat exchanger according to claim 1, characterized in that: The first arc-shaped wing (21) and the second arc-shaped wing (22) are arranged alternately in the airflow direction.

4. A high-pressure tube-fin heat exchanger according to claim 1, characterized in that: The cross-sections of the first arc-shaped wing (21) and the second arc-shaped wing (22) are elliptical arcs, and the angle θ between the major axis of the ellipse and the airflow direction satisfies: 15°≤θ≤75°.

5. A high-pressure tube-fin heat exchanger according to claim 1, characterized in that: Also includes: The liquid inlet (3) is located at one end of the heat exchange tube (1); The drain port (4) is located at the other end of the heat exchange tube (1).

6. A high-pressure tube-fin heat exchanger according to claim 1, characterized in that: The thickness of the first arc-shaped wing (21) and the second arc-shaped wing (22) decreases from the root to the end, and the root thickness δ1 and the end thickness δ2 satisfy: δ1 / δ2≥1.5.

Images