Efficient evaporation heat exchange tube

Abstract

The utility model relates to an efficient evaporation heat exchange tube, relates to the technical field of evaporation heat exchange tubes in air conditioners and refrigerating systems, and solves the problem of how to improve the heat exchange efficiency of the evaporation heat exchange tubes. The outer fins are formed by extending materials on the pipe body in the radius direction of the pipe body and spirally extending on the outer surface of the pipe body around the pipe body, the outer fins and the pipe body are integrally formed, the section of each outer fin is in a Y shape, and fin top grooves are formed in the top ends of the outer fins; a first groove channel is formed in one side of each outer fin in a penetrating mode, and a second groove channel is formed in the other side of each outer fin in a penetrating mode. The forming direction of the fin top groove is consistent with the trend of the first channel and the second channel; notches are formed in the tops of the outer fins at intervals; an internal thread rib integrally formed with the pipe body is arranged on the inner surface of the pipe body in a protruding mode. Through collaborative design of the outer fins, the channels and the internal thread ribs, synchronous optimization of heat exchange of the inner side and the outer side of the tube is achieved, and the heat exchanger is light in weight and high in reliability.

Description

Technical Field

[0001] This utility model relates to the technical field of evaporative heat exchange tubes in air conditioning and refrigeration systems, and particularly to a high-efficiency evaporative heat exchange tube. Background Technology

[0002] With the rapid development of the economy and society, my country has quickly become a major energy consumer in the world. The increasing energy production and consumption year by year have put enormous pressure on my country's energy security and environmental capacity, posing a major challenge to the sustainable development of my country's economy and society.

[0003] The evaporator is a crucial component of a central air conditioning unit, and its heat exchange efficiency directly impacts the unit's overall energy efficiency ratio. Evaporator tubes are the core component of the evaporator, widely used in refrigeration, air conditioning, chemical, and food processing industries. In recent years, to enhance heat exchange, save costs, and improve energy efficiency, various methods have been adopted to increase heat exchange efficiency. Internal tube materials have evolved from plain tubes to double-sided reinforced evaporator tubes with internal thread structures and external three-dimensional low-fin structures, thereby improving evaporator heat exchange efficiency and unit performance. In the future, with the development of technologies such as intelligent and green manufacturing, evaporator tubes will play an even more important role in more fields. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency evaporative heat exchange tube, which solves the problem of how to improve the heat exchange efficiency of the evaporative heat exchange tube.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a high-efficiency evaporative heat exchange tube, including a tube body and an outer fin integrally formed with the tube body. The outer fin is formed by extending material from the tube body along the radial direction of the tube body and spirally extending around the tube body on the outer surface of the tube body. The cross-section of the outer fin is Y-shaped, and the top of the outer fin is formed with a fin-top groove. A first channel is provided through one side of the outer fin, and a second channel is provided through the other side of the outer fin. The opening direction of the fin-top groove is consistent with the direction of the first channel and the second channel. The top of the outer fin is provided with slits at intervals. An internally threaded rib integrally formed with the tube body is protruding on the inner surface of the tube body.

[0007] Furthermore, the wing-top groove divides the top of the outer wing into a first forked wing and a second forked wing, wherein the surface area of ​​the first forked wing is smaller than the surface area of ​​the second forked wing; and the lateral extension length of the first forked wing is smaller than the lateral extension length of the second forked wing.

[0008] Furthermore, the width of the first channel is smaller than the width of the second channel, and both the first channel and the second channel are narrower at the top and wider at the bottom.

[0009] Furthermore, the first channel is located on the side of the first fork wing, and the second channel is located on the side of the second fork wing.

[0010] Furthermore, a fin bottom sinkhole is provided in the second channel.

[0011] Furthermore, the cuts on adjacent outer fins connect to form secondary channels.

[0012] Furthermore, the secondary channel is connected to the first channel, the second channel, and the fin top groove.

[0013] Furthermore, the gap between two adjacent internal thread ribs forms an internal thread groove.

[0014] Due to the application of the above technical solution, this utility model has the following advantages compared with the prior art:

[0015] This utility model discloses a high-efficiency evaporative heat exchange tube in which the outer fins are integrally formed with the tube body, eliminating the contact thermal resistance between the two; and the outer fins are Y-shaped, making the surface area of ​​a single fin larger than that of traditional rectangular or trapezoidal fins, thereby increasing the contact area between the refrigerant and the fins.

[0016] The slits at the top of the outer fins are spaced out to divide the continuous outer fins into several fin platforms. This is to further increase the heat exchange surface area, reduce the weight of the tube, and ensure that the refrigerant is evenly distributed on the outer surface of the tube, so as to avoid the liquid film being too thick or local drying, which would affect the heat exchange effect.

[0017] The internal thread ribs help to thin the fluid boundary layer inside the pipe, enhance the turbulence of the fluid inside the pipe, reduce the thermal resistance of heat transfer inside the pipe, increase the heat transfer area inside the pipe, and improve the heat transfer coefficient inside the pipe.

[0018] Furthermore, the design of the first and second channels, which are narrower at the top and wider at the bottom, results in a relatively small diameter at the top of the channels, which in turn creates a large number of vaporization chambers inside the channels. After bubbles are generated, they overflow from the channels, thereby enhancing the heat exchange effect outside the tube. Attached Figure Description

[0019] The following sections will describe some specific embodiments of the present invention in a detailed manner by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or components. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0020] Figure 1 This is a three-dimensional structural diagram of a high-efficiency evaporative heat exchange tube provided by this utility model;

[0021] Figure 2 This is a top view of a high-efficiency evaporative heat exchange tube provided by this utility model;

[0022] Figure 3 This is a front view of a high-efficiency evaporative heat exchange tube provided by this utility model;

[0023] Figure 4 This is a right view of a high-efficiency evaporative heat exchange tube provided by this utility model.

[0024] The reference numerals in the attached figures are explained as follows:

[0025] 1. Tube body; 2. Outer fin; 21. Fin top groove; 22. Cut; 23. First forked fin; 24. Second forked fin; 3. First channel; 4. Second channel; 5. Internal threaded rib; 51. Internal threaded groove; 6. Fin bottom groove; 7. Secondary channel. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figure 1 The diagram shown is a three-dimensional structural schematic of a high-efficiency evaporative heat exchanger tube, which is a section of the evaporative heat exchanger tube. It includes a tube body 1, and outer fins 2 and internal threaded ribs 5 integrally formed with the tube body 1.

[0028] Specifically, see Figures 1 to 4 The outer fin 2 extends radially along the tube body 1 and spirals around the tube body on its outer surface. The outer fin 2 is formed by extruding material from the tube body 1. This one-piece molding eliminates the contact thermal resistance between the outer fin 2 and the tube body 1, thereby reducing heat transfer loss between them.

[0029] In this embodiment, the outer fin 2 is Y-shaped, resulting in a fin top groove 21 formed at the top of the outer fin 2. The fin top groove 21 is narrow at the bottom and wide at the top, forming a triangle. The triangular fin top groove 21 divides the top of the outer fin 2 into a first forked fin 23 and a second forked fin 24, and the surface area of ​​the first forked fin 23 is smaller than that of the second forked fin 24. This design increases the heat exchange surface area and reduces flow resistance, ensuring that the refrigerant liquid film is uniformly covered on the fin surface.

[0030] A first channel 3 is provided on one side of the outer fin 2, and a second channel 4 is provided on the other side of the outer fin 2. The first channel 3, the second channel 4, and the aforementioned fin top groove 21 have the same orientation. In this embodiment, the width of the first channel 3 is smaller than the width of the second channel 4. This is because adjacent outer fins 2 are arranged symmetrically, that is, the first forked fin 23 of the outer fin 2 is adjacent to the first forked fin 23 of the outer fin 2 on the adjacent side, while the second forked fin 24 of the outer fin 2 is adjacent to the second forked fin 24 of the outer fin 2 on the other side. Because the surface area of ​​the first forked fin 23 is smaller than the surface area of ​​the second forked fin 24, and the lateral extension length of the first forked fin 23 is smaller than the lateral extension length of the second forked fin 24, the spacing between adjacent outer fins 2 is separated by wide and narrow channels. In fact, the first channel 3 is located on the side of the first forked fin 23, and the second channel 4 is located on the side of the second forked fin 24.

[0031] The design of the first channel 3 and the second channel 4, which are narrow at the top and wide at the bottom, creates small-diameter pore structures at the top of each channel. This results in a large number of vaporization chambers inside the channels. After bubbles are generated in the pores, they overflow from the small-diameter pores, thereby enhancing the heat exchange effect outside the tube.

[0032] Of course, the arrangement of the fork fins and channels is not limited to the above-described manner. The widths of the first channel 3 and the second channel 4 can also be set to be consistent. In this case, the surface area and lateral extension length of the first fork fin 23 and the second fork fin 24 can be consistent, that is, the outer fin 2 is divided into two fork fins with the same external dimensions by the fin top groove 21. Alternatively, the first fork fin 23 of the outer fin 2 can be arranged adjacent to the second fork fin 24 of the adjacent outer fin 2, thereby controlling the width of the first channel 3 to be consistent with the width of the second channel 4. All the above-described arrangements of the fork fins and channels should be covered within the scope of protection of this utility model.

[0033] In this embodiment, a fin-bottom groove 6 is also formed in the second channel 4, and the extension direction of the fin-bottom groove 6 is consistent with the extension direction of the outer fin 2. The setting of the fin-bottom groove 6 can further increase the vaporization core of the second channel 4, and the formed bubbles can easily overflow from the hole diameter at the top of the channel, which is conducive to making greater use of its heat transfer performance and improving the heat transfer coefficient outside the tube.

[0034] In this embodiment, the top of the outer fin 2 is also provided with slits 22 at intervals. The slits 22 on adjacent outer fins 2 are connected to form secondary channels 7. The extension direction of the secondary channels 7 is perpendicular to the extension direction of the first channel 3 and the second channel 4. The secondary channels 7 are also connected to the first channel 3, the second channel 4, and the fin top groove 21. The secondary channels 7 divide the continuous outer fins 2 into several fin platforms, which is to further increase the heat exchange surface area, reduce the weight of the tube, and ensure that the refrigerant is evenly distributed on the outer surface of the tube, avoiding excessively thick liquid film or local drying that would affect the heat exchange effect. Of course, the extension direction of the secondary channels 7 does not necessarily have to be perpendicular to the extension direction of the first channel 3 and the second channel 4; they can also be staggered, as long as the channels are connected to each other.

[0035] The inner surface of the tube body 1 is also provided with an internally threaded rib 5 integrally formed with the tube body 1, and the gap between two adjacent internally threaded ribs 5 forms an internally threaded groove 51. The setting of the internally threaded rib 5 is beneficial to thinning the fluid boundary layer inside the tube, enhancing the turbulence of the fluid inside the tube, reducing the thermal resistance of heat transfer inside the tube, increasing the heat transfer area inside the tube, and improving the heat transfer coefficient inside the tube.

[0036] In addition, it should be noted that in this embodiment, the depth and width of each channel can be reasonably arranged according to actual needs.

[0037] In summary, the high-efficiency evaporative heat exchanger tube in this example features an integrally formed outer fin 2 and tube body 1, eliminating contact thermal resistance and enhancing heat transfer efficiency. The Y-shaped cross-section and the first forked fin 23 and second forked fin 24, divided by the fin tip groove 21, optimize refrigerant liquid film distribution and flow resistance through differentiated surface areas and extension lengths. The first channel 3 and second channel 4 are spaced apart; narrow channels enhance capillary action, while wide channels promote bubble detachment, achieving efficient equilibrium of gas-liquid phase change. The secondary channel 7 connects the first channel 3, second channel 4, and fin tip groove 21 through a cut 22, forming a three-dimensional flow path, preventing excessively thick or dried-out liquid films, and reducing tube weight. The internally threaded rib 5 is integrally formed with the tube body 1, enhancing turbulence, thinning the boundary layer, and significantly improving the heat transfer coefficient inside the tube. Through the synergistic design of the outer fin 2, channels, and internally threaded rib 5, simultaneous optimization of heat exchange on both the inner and outer sides of the tube is achieved, making it suitable for high-efficiency air conditioning, chemical evaporation, and other fields, combining lightweight design with high reliability.

[0038] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-efficiency evaporative heat exchange tube, characterized in that, The device includes a tube (1) and an outer fin (2) integrally formed with the tube (1) by extending the material on the tube (1) along the radial direction of the tube (1) and spirally extending around the tube (1) on the outer surface of the tube (1). The cross-section of the outer fin (2) is Y-shaped, and a fin top groove (21) is formed at the top of the outer fin (2). A first channel (3) is provided on one side of the outer fin (2), and a second channel (4) is provided on the other side of the outer fin (2). The opening direction of the fin top groove (21) is consistent with the direction of the first channel (3) and the second channel (4). The top of the outer fin (2) is provided with cuts (22) at intervals. An internally threaded rib (5) integrally formed with the tube (1) is provided on the inner surface of the tube (1).

2. The high-efficiency evaporative heat exchange tube according to claim 1, characterized in that, The wing top groove (21) divides the top of the outer wing (2) into a first fork wing (23) and a second fork wing (24). The surface area of ​​the first fork wing (23) is smaller than that of the second fork wing (24), and the lateral extension length of the first fork wing (23) is smaller than that of the second fork wing (24).

3. The high-efficiency evaporative heat exchange tube according to claim 2, characterized in that, The width of the first channel (3) is smaller than the width of the second channel (4), and both the first channel (3) and the second channel (4) are narrower at the top and wider at the bottom.

4. The high-efficiency evaporative heat exchanger tube according to claim 3, characterized in that, The first channel (3) is located on the side of the first fork wing (23), and the second channel (4) is located on the side of the second fork wing (24).

5. The high-efficiency evaporative heat exchanger tube according to claim 3, characterized in that, The second channel (4) has a fin bottom sink (6).

6. The high-efficiency evaporative heat exchanger tube according to claim 1, characterized in that, The cuts (22) on adjacent outer fins (2) are connected to form a secondary channel (7).

7. The high-efficiency evaporative heat exchanger tube according to claim 6, characterized in that, The secondary channel (7) is connected to the first channel (3), the second channel (4) and the wing-top groove (21).

8. The high-efficiency evaporative heat exchanger tube according to claim 1, characterized in that, The gap between two adjacent internal thread ribs (5) forms an internal thread groove (51).

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