Heat exchange tube, steam generation device and refrigeration equipment

Abstract

The utility model relates to a heat exchange tube, a steam generation device and refrigeration equipment, and the heat exchange tube comprises a tube body which is provided with an inner wall and an outer wall; the fins are distributed on the outer wall of the pipe body at intervals, the fins are arc-shaped and extend in the circumferential direction of the pipe body, gaps between the fins and the outer wall form cavities of the vaporization core, at least two arc-shaped holes are formed in the sides, facing the pipe body, of the fins, and the radians of the at least two arc-shaped holes are gradually increased in the arc length direction away from the fin roots. The device is used for guiding bubbles to gradually grow. According to the invention, a vaporization core required by refrigerant evaporation can be provided, evaporation heat transfer is enhanced, and the formation, growth, escape and other processes of bubbles are maintained, so that the bubbles can stably grow, the phase change enhanced heat exchange requirements of the inner side and the outer side of the pipe body are met, evaporation heat exchange of a working medium outside the pipe is stabilized and promoted, and the evaporation efficiency is improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchange technology, and in particular to a heat exchange tube, a steam generating device and a refrigeration equipment. Background Art

[0002] At present, commonly used steam generating devices include steam boilers and flash steam generators. Steam boilers include a drum and a furnace. Fuel burns in the furnace to generate heat, and water is heated in the drum to become water vapor. In order to produce sufficient water vapor, the steam boiler needs to burn a large amount of fuel, which not only has low thermal efficiency, but also emits exhaust gas into the air after the fuel is burned, which seriously pollutes the environment. The flash steam generator uses a high-temperature water circulation pump to transport high-pressure hot water to the water side throttling device, reduce the pressure and throttle the high-pressure hot water, and obtain water vapor after cooling and pressure reduction. The water vapor enters the condenser after the compressor to release heat and condense, and is further cooled by the expansion valve to become the original liquid working fluid. The requirements for the compressor during operation are stringent and there is additional energy loss.

[0003] The compression steam heat pump uses high-temperature refrigerant to directly heat water in a shell and tube heat exchanger to produce high-temperature steam. The unit has high energy efficiency and high heat utilization rate, and can omit the flash steam generator, saving costs and space. Shell and tube heat exchangers generally use horizontal heat exchange tubes, and corresponding high-efficiency evaporator tubes are required for evaporation. However, the commonly used surface porous evaporator tubes on the market are mainly developed for refrigerants, and the surface tension of water is much greater than that of refrigerants. From the analysis of bubble dynamics, high-efficiency evaporator tubes for refrigerants may not be suitable for enhanced heat exchange of water. At the same time, the refrigerant condenses and releases heat in the tube, and its heat exchange also needs to be enhanced. Therefore, it is urgent to develop high-efficiency heat exchange tubes with double-sided phase change suitable for evaporation outside the water tube to improve the water evaporation heat exchange efficiency and the condensation heat transfer efficiency of the refrigerant in the tube. Utility Model Content

[0004] The purpose of the present application is to provide a heat exchange tube, a steam generating device and a refrigeration equipment, which can meet the phase change enhanced heat exchange requirements on both sides of the tube body and the outside, stabilize and promote the evaporation heat exchange of the liquid working fluid outside the tube, and improve the evaporation efficiency.

[0005] In the first aspect, an embodiment of the present application provides a heat exchange tube, comprising: a tube body, having an inner wall and an outer wall; and a plurality of fins, which are spaced apart on the outer wall of the tube body, the fins being arc-shaped and extending circumferentially along the tube body, the gaps between the fins and the outer wall forming cavities of vaporization cores, and at least two arc-shaped holes are provided on the side of the fins facing the tube body, the curvature of the at least two arc-shaped holes gradually increases along the arc length direction away from the wing root, so as to guide the bubbles to grow gradually.

[0006] In a possible implementation, the plurality of fins are distributed in a plurality of rows at intervals on the outer wall of the tube body along the circumference of the tube body, and the fins in each row are distributed in an axial direction of the tube body at intervals.

[0007] In a possible implementation manner, the extension directions of the multiple rows of fins are the same, and the curvatures of the fins and the corresponding tubes are substantially the same.

[0008] In a possible implementation manner, a wing portion is formed between two adjacent arc-shaped holes, and the wing portion is protruded toward the tube body and extends along the radial direction of the tube body.

[0009] In a possible implementation, the width of the arc-shaped hole along the arc length direction of the fin is 0.03 mm to 0.6 mm, and the maximum distance between the arc-shaped hole and the outer wall is 0.1 mm to 0.8 mm.

[0010] In a possible embodiment, the outer wall of the tube body is provided with a wavy structure, which extends from the fin roots along the circumference of the tube body. In the circumference of the tube body, a first distance between two adjacent fins is equal to a second distance between two adjacent wavy structures.

[0011] In a possible implementation, the wavy structure includes convex portions and concave portions that are staggeredly distributed along the axial direction, the top shape of the convex portion and the bottom shape of the concave portion are both arcs, and the concave portion forms a cavity that is the core of the liquid working medium vaporization.

[0012] In a possible implementation, the depth of the concave portion is 0.002 mm to 0.18 mm, and the width of the concave portion along the axial direction is 0.003 mm to 0.2 mm; the height of the convex portion is 0.002 mm to 0.18 mm, and the width of the convex portion along the axial direction is 0.003 mm to 0.2 mm.

[0013] In a possible implementation, the inner wall of the tube body is provided with a plurality of rows of teeth, and an angle is formed between the arrangement direction of each row of teeth and the axial direction of the tube body, and the value range of the angle is 0-80°.

[0014] In a possible implementation, the tooth portion is in the shape of a quadrangular pyramid, the bottom of the quadrangular pyramid is connected to the inner wall, the side length of the bottom is 0.15 mm to 0.4 mm, and the height of the quadrangular pyramid is 0.25 mm to 0.5 mm.

[0015] In a second aspect, an embodiment of the present application further provides a steam generating device, comprising the heat exchange tube as described above.

[0016] In a third aspect, an embodiment of the present application further provides a refrigeration device, comprising the steam generating device as described above.

[0017] The heat exchange tube, steam generating device and refrigeration equipment provided by the embodiment of the present application are provided with a plurality of fins distributed at intervals on the outer wall of the tube body, the fins are arc-shaped and extend along the circumference of the tube body, the gap between the fins and the outer wall forms a cavity of the vaporization core, and at least two arc-shaped holes are provided on the side of the fin facing the tube body, and the curvature of at least two arc-shaped holes gradually increases along the arc length direction away from the wing root, which is used to guide the bubbles to grow gradually. As a result, the liquid working medium on one side of the outer wall of the tube body absorbs the heat in the tube body to undergo an evaporation phase change, and the cavity formed by the gap between the fin and the outer wall can provide the vaporization core required for the evaporation of the liquid working medium, thereby enhancing the evaporation heat transfer; and the curvature of at least two arc-shaped holes gradually increases along the arc length direction away from the wing root, thereby guiding the bubbles to grow gradually, maintaining the formation, growth and escape of the bubbles, so that the bubbles can grow stably, meet the phase change and heat exchange enhancement requirements on both sides of the tube body, stabilize and promote the evaporation heat exchange of the liquid working medium outside the tube, and improve the evaporation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The features, advantages and technical effects of the exemplary embodiments of the present application will be described below with reference to the accompanying drawings. In the accompanying drawings, the same reference numerals are used for the same components. The accompanying drawings are not drawn according to the actual scale, but are only used to illustrate the relative position relationship. The layer thickness of some parts is exaggerated for easy understanding, and the layer thickness in the accompanying drawings does not represent the proportional relationship of the actual layer thickness.

[0019] Figure 1 A schematic diagram of a partial three-dimensional structure of a heat exchange tube provided in one embodiment of the present application is shown;

[0020] Figure 2 Show Figure 1 The schematic diagram of the cross-sectional structure of the heat exchange tube along the circumferential direction is shown;

[0021] Figure 3 A schematic diagram showing a partial three-dimensional structure of a heat exchange tube provided in another embodiment of the present application is shown;

[0022] Figure 4 Show Figure 3 A schematic diagram of the enlarged structure of the middle area A;

[0023] Figure 5 Show Figure 3 The schematic diagram of the cross-sectional structure of the heat exchange tube along the circumferential direction is shown;

[0024] Figure 6 Show Figure 3 The schematic diagram of the cross-sectional structure of the heat exchange tube along the axial direction is shown;

[0025] Figure 7 A schematic diagram showing a partial three-dimensional structure of a heat exchange tube provided in another embodiment of the present application is shown;

[0026] Figure 8 Show Figure 7 A schematic diagram of the local structure of the inner wall of the heat exchange tube shown;

[0027] Fig. 9 A schematic diagram of the structure of a refrigeration device provided in an embodiment of the present application is shown. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 1. Pipe body; 1a, inner wall; 1b, outer wall; 11, wavy structure; 11a, convex part; 11b, concave part; 12, tooth part;

[0030] 2. fin; 21. arc-shaped hole; 22. wing part. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0032] As we all know, steam generators are essential components of refrigeration equipment such as air conditioners, and heat exchange tubes are the core components of steam generators. Their heat exchange performance determines the performance of steam generators. For the heat exchange tube manufacturing industry, improving the energy efficiency of refrigeration equipment is mainly achieved by improving the heat exchange efficiency of heat exchange tubes.

[0033] When the steam generating device is used as a condenser, a high-temperature refrigerant is set inside the heat exchange tube, and the liquid water outside the tube absorbs the heat of the refrigerant inside the tube to evaporate and change phase. Research on the boiling heat transfer mechanism shows that the boiling of liquid requires the existence of a vaporization core. The surface of the heat exchange tube is generally machined to form a large number of cavities to provide the vaporization core required for water evaporation, thereby enhancing evaporation heat transfer. During the boiling process, when the bubbles grow and break away from the cavities, due to the surface tension of the liquid, the active cavities will intercept part of the steam and become new vaporization cores, grow new bubbles, and make the boiling process continue. The reasonable setting of the cavity structure plays a vital role in enhancing heat transfer. The cavity structure of the heat exchange tube should be conducive to the generation of bubbles and enable the bubbles to float freely and discharge from the surface of the liquid, forming a continuous boiling heat exchange process, thereby improving the heat exchange performance of the heat exchange tube.

[0034] To this end, each embodiment of the present application provides a heat exchange tube, which can meet the phase change enhanced heat exchange requirements on both sides of the tube body and the outside, stabilize and promote the evaporation heat exchange of the liquid working fluid outside the tube, and improve the evaporation efficiency of the steam generating device.

[0035] like Figure 1 and Figure 2 As shown, the heat exchange tube provided in the embodiment of the present application includes: a tube body 1 and a plurality of fins 2.

[0036] The tube body 1 has an inner wall 1a and an outer wall 1b, and the cross-sectional shape of the tube body 1 can be circular, elliptical or polygonal. When the steam generating device is used as a condenser, a refrigerant such as, but not limited to, Freon is disposed on one side of the inner wall 1a of the tube body 1, and a liquid working medium such as, but not limited to, water is disposed on one side of the outer wall 1b of the tube body 1.

[0037] A plurality of fins 2 are distributed at intervals on the outer wall 1b of the tube body 1. They can be distributed at intervals along the axial direction of the tube body 1 or along the circumferential direction of the tube body 1, and there is no limitation here. The fins 2 are arc-shaped and extend along the circumference of the tube body 1. Optionally, the length of the fins 2 along the circumference is 0.1 mm to 1.2 mm. The gap between the fins 2 and the outer wall 1b forms a cavity for the vaporization core of the liquid working medium. At least two arc-shaped holes 21 are provided on the side of the fin 2 facing the tube body 1. The curvature of the at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, which is used to guide the bubbles to grow gradually.

[0038] In this embodiment, each fin 2 is independently and spaced apart on the outer wall 1b of the tube body 1, which can increase the heat transfer area outside the tube. The gap between the fin 2 and the outer wall 1b forms a cavity of the vaporization core of the liquid working medium. When the surface temperature of the outer wall 1b of the tube body 1 exceeds the saturation temperature of the liquid working medium and reaches a certain value, such as 120°C, the liquid working medium forms bubbles at the cavity of the outer wall 1b, and the bubbles gradually grow from the initial vapor core formation to the bubble growth and escape from the cavity. The fin 2 is arc-shaped and extends along the circumference of the tube body 1, which can guide and gather the bubbles to the arc-shaped holes 21 set on the side of the fin 2 facing the tube body 1. The arc-shaped holes 21 can provide space for the growth of bubbles. The curvature of at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, which can guide the bubbles to grow gradually, promote the merging of bubbles, and accelerate the bubbles to detach from the cavity and float up. Bubbles absorb a large amount of latent heat of vaporization during their formation and growth process, and their detachment and upward movement produce violent disturbances, thereby enhancing boiling heat transfer.

[0039] After the bubbles leave the outer wall 1b of the tube body 1, if the liquid working medium has not yet reached the saturation temperature, the bubbles will condense and disappear after releasing heat to the liquid working medium. This is called supercooled boiling. If the liquid working medium has reached the saturation temperature, the bubbles will continue to absorb heat and grow until they escape from the liquid surface. This is called saturated boiling. For both types of boiling, the vaporization core plays an important role, so it is also called nucleate boiling. Under the conditions of saturated boiling, bubbles can only grow and nucleate boiling can only occur when the radius of the vaporization core is greater than the minimum radius required for bubble growth. In other words, the shape and size of the cavity of the vaporization core formed by the gap between the fin 2 and the outer wall 1b directly affects the formation, growth, and escape of the bubbles, and also affects the maintenance of bubble growth. That is, the shape and size of the fin 2 directly determine the stability and level of the evaporation performance of the heat exchange tube.

[0040] The heat exchange tube provided in the embodiment of the present application is provided with a refrigerant on one side of the inner wall 1a of the tube body 1, a liquid working medium on one side of the outer wall 1b, and a plurality of fins 2 distributed at intervals are provided on the outer wall 1b of the tube body 1. The fins 2 are arc-shaped and extend along the circumference of the tube body. The gap between the fins 2 and the outer wall 1b forms a cavity for the vaporization core of the liquid working medium. At least two arc-shaped holes 21 are provided on the side of the fin 2 facing the tube body 1. The curvature of the at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, so as to guide the bubbles to grow gradually. As a result, the liquid working medium on one side of the outer wall 1b of the tube body 1 absorbs the heat of the refrigerant in the tube body 1 and undergoes an evaporation phase change, and the cavity formed by the gap between the fin 2 and the outer wall 1b can provide a vaporization core required for the evaporation of the liquid working medium, thereby enhancing the evaporation heat transfer; and the curvature of the at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, which is used to guide the bubbles to gradually grow and maintain the processes of bubble formation, growth and escape, so that the bubbles can grow stably, meet the phase change enhanced heat exchange requirements on both sides of the tube body and the outside, stabilize and promote the evaporation heat exchange of the liquid working medium outside the tube, and improve the evaporation efficiency of the heat exchange tube.

[0041] In some embodiments, a plurality of fins 2 are distributed in multiple rows along the circumference of the tube body 1 on the outer wall 1b of the tube body 1, and each row of fins 2 is distributed in the axial direction of the tube body 1. In one example, the outer wall 1b of the tube body 1 is provided with 11 to 60 fins 2 per inch along the axial direction, and 20 to 130 rows of fins 2 are provided along the circumference. The specific number of fins 2 is determined according to the diameter of the tube body 1 and is not limited here.

[0042] like Figure 1 and Figure 2As shown, the axial direction of the tube body 1 is X, the circumferential direction is Y, and the radial direction is Z. The intervals between each fin 2 and the outer wall 1b are distributed at intervals along the circumferential direction Y and the axial direction X of the tube body 1 to provide space and channels for the liquid working medium to enter and the steam to escape. Multiple fins 2 are regularly distributed along the outer wall 1b of the tube body 1, which can ensure that the shape and size of the cavity of the vaporization core formed by the gap between each fin 2 and the outer wall 1b are controllable, and a larger number of vaporization cores can be provided, so that the evaporation efficiency of the liquid working medium is higher, and the contact area of ​​the entire heat exchange tube with the liquid working medium is larger, thereby increasing the heat transfer area, so that the heat exchange effect is better, and then the evaporation heat exchange efficiency of the heat exchange tube is higher.

[0043] In some embodiments, the extension direction of multiple rows of fins 2 is the same, and the curvature of the fins 2 is substantially the same as that of the corresponding tube body 1. Such an arrangement can ensure that the multiple fins 2 form a uniform curved and inclined shape, the structural shape of the cavity is uniform, the formation and growth process of the bubble is consistent, the evaporation performance of the heat exchange tube remains stable, and the evaporation efficiency of the heat exchange tube is further improved.

[0044] In some embodiments, a wing portion 22 is formed between two adjacent arc-shaped holes 21, and the wing portion 22 is protruded toward the tube body 1 and extends along the radial direction of the tube body 1. Figure 2 As shown, three arc-shaped holes 21 are provided on the side of the fin 2 facing the tube body 1, and the curvature of the arc-shaped holes 21 gradually increases along the arc length direction away from the wing root. The three arc-shaped holes 21 can not only serve as the growth points of the steam core, but also have different space requirements for the cavities when the bubbles gradually grow. The gradually increasing holes provide space for the bubbles to grow at different times. A wing portion 22 is formed between two adjacent arc-shaped holes 21. The wing portion 22 is protruded toward the tube body 1 and extends along the radial direction Z of the tube body 1, so that the wing portion 22 is almost perpendicular to the wall of the tube body 1. The wing portion 22 can destroy the surface tension of the bubble, making it easier for the bubble to overflow, detach and float from the arc-shaped hole 21. At the same time, the detachment and floating movement of the bubble produce violent disturbances, further enhancing the boiling heat exchange.

[0045] In some embodiments, the width of the arc hole 21 along the arc length direction of the fin 2 is 0.03mm-0.6mm, and the maximum distance between the arc hole 21 and the outer wall 1b is 0.1mm-0.8mm. The structural dimensions of the arc hole 21 are set in this way to ensure that the bubbles can grow stably.

[0046] In some embodiments, the outer wall 1b of the tube body 1 is provided with a wavy structure 11, which extends from the root of the fin 2 along the circumference of the tube body 1. In the circumference of the tube body 1, the first distance between two adjacent fins 2 is equal to the second distance between two adjacent wavy structures 11.

[0047] like Figures 3 to 6As shown, the outer wall 1b of the tube body 1 is provided with a wavy structure 11, and extends from the root of the fin 2 along the circumference of the tube body 1. When a plurality of fins 2 are spaced apart along the axial and circumferential directions of the tube body 1, a plurality of wavy structures 11 are spaced apart along the axial and circumferential directions of the tube body 1, correspondingly. Moreover, in the circumferential direction of the tube body 1, the first distance H1 between two adjacent fins 2 is equal to the second distance H2 between two adjacent wavy structures 11. With such a configuration, the wavy structure 11 can increase the heat transfer area, and disturb the flow of the liquid working medium and steam in the cavity between the fin 2 and the outer wall 1b, further promoting the heat exchange between the liquid working medium and the tube body 1.

[0048] Furthermore, the wave-shaped structure 11 includes convex parts 11a and concave parts 11b that are staggered along the axial direction, the top shape of the convex part 11a and the bottom shape of the concave part 11b are both arcs, and the concave part 11b forms a cavity as the core of the liquid working medium vaporization. Figure 4 As shown, the convex portion 11a and the concave portion 11b are both arranged in an arc-shaped straight strip structure, and multiple convex portions 11a and multiple concave portions 11b are staggeredly distributed along the axial direction X. The concave portion 11b can also serve as a cavity for the vaporization core of the liquid working medium, providing a larger number of vaporization cores for the evaporation of the liquid working medium, reducing the demand for superheat, and further improving the evaporation efficiency.

[0049] In some embodiments, the depth of the concave portion 11b is 0.002 mm to 0.18 mm, and the width of the concave portion 11b along the axial direction is 0.003 mm to 0.2 mm. The height of the convex portion 11a is 0.002 mm to 0.18 mm, and the width of the convex portion 11a along the axial direction is 0.003 mm to 0.2 mm. The depth and width of the convex portion 11a and the concave portion 11b are the same, which simplifies the preparation process, and equally disturbs the flow of the liquid working medium and the steam in the cavity between the fin 2 and the outer wall 1b, thereby promoting heat exchange between the liquid working medium and the tube body 1.

[0050] In some embodiments, the inner wall 1a of the tube body 1 is provided with a plurality of rows of teeth 12, and an angle is formed between the arrangement direction of each row of teeth 12 and the axial direction of the tube body 1, and the value range of the angle is 0-80°.

[0051] like Figure 7 and Figure 8 As shown, the inner wall 1a of the tube body 1 is provided with multiple rows of teeth 12, which can increase the heat transfer area of ​​the tube body 1, enhance the fluid turbulence in the tube body 1, and increase the heat exchange efficiency in the tube body 1. In addition, the arrangement direction of each row of teeth 12 forms an angle with the axial direction of the tube body 1, so that the multiple teeth 12 are spiraled on the inner wall 1a of the tube body 1, which can further expand the heat transfer area, and the multiple teeth 12 are arranged in multiple rows and evenly, so that each part of the tube body 1 can transfer heat evenly, further enhancing the heat transfer effect.

[0052] In some embodiments, the tooth portion 12 is in the shape of a quadrangular pyramid, the bottom of the quadrangular pyramid is connected to the inner wall 1a, and the bottom side length is 0.15mm to 0.4mm, and the height of the quadrangular pyramid is 0.25mm to 0.5mm. The shape and size of the tooth portion 12 are set in this way, which can not only enhance the fluid turbulence in the tube body 1, but also form secondary turbulence between the staggered teeth 12, further enhancing heat exchange. In addition, the top of the tooth portion 12 can pierce the condensate film, enhance the contact between the refrigerant vapor and the tube wall, enhance the condensation heat exchange of the refrigerant, increase the heat exchange efficiency in the tube body 1, and also facilitate processing.

[0053] In addition, the embodiment of the present application further provides a steam generating device, comprising the heat exchange tube as described above. When the steam generating device is used as a condenser, the outer wall 1b of the tube body 1 of the heat exchange tube is provided with liquid working medium, and the inner wall 1a of the tube body 1 is provided with refrigerant.

[0054] The steam generating device provided in the embodiment of the present application adopts the heat exchange tube as described above, by arranging a refrigerant on one side of the inner wall 1a of the tube body 1, and a liquid working medium on one side of the outer wall 1b, and a plurality of fins 2 distributed at intervals are arranged on the outer wall 1b of the tube body 1, the fins 2 are arc-shaped and extend along the circumference of the tube body, and the gap between the fins 2 and the outer wall 1b forms a cavity for the vaporization core of the liquid working medium, and at least two arc-shaped holes 21 are arranged on the side of the fin 2 facing the tube body 1, and the curvature of the at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, so as to guide the bubbles to grow gradually. As a result, the liquid working medium on one side of the outer wall 1b of the tube body 1 absorbs the heat of the refrigerant in the tube body 1 and undergoes an evaporation phase change, and the cavity formed by the gap between the fin 2 and the outer wall 1b can provide a vaporization core required for the evaporation of the liquid working medium, thereby enhancing the evaporation heat transfer; and the curvature of the at least two arc-shaped holes 21 gradually increases along the arc length direction away from the wing root, which is used to guide the bubbles to gradually grow and maintain the processes of bubble formation, growth and escape, so that the bubbles can grow stably, meet the phase change enhanced heat exchange requirements on both sides of the tube body and the outside, stabilize and promote the evaporation heat exchange of the liquid working medium outside the tube, and improve the evaporation efficiency of the heat exchange tube.

[0055] It should be noted that the steam generating device of the embodiment of the present application can also be used as an evaporator. In this case, a refrigerant is arranged on one side of the outer wall 1b of the tube body 1 of the heat exchange tube, and a liquid working medium is arranged on one side of the inner wall 1a of the tube body 1.

[0056] like Fig. 9 As shown, the embodiment of the present application also provides a refrigeration device, including a compressor, an evaporator and a condenser, wherein the condenser or the evaporator is a steam generating device as described above. That is to say, the steam generating device can be used as a condenser or as an evaporator. The refrigeration device adopts the above-mentioned steam generating device, and the heat exchange efficiency is higher and the energy efficiency is higher.

[0057] It should be noted that the phrases "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments", etc. mentioned in the specification indicate that the described embodiments may include certain features, structures or characteristics, but not every embodiment may include the certain features, structures or characteristics. In addition, such phrases do not necessarily refer to the same embodiment. In addition, when describing certain features, structures or characteristics in conjunction with an embodiment, it is within the knowledge of those skilled in the art to implement such features, structures or characteristics in conjunction with other embodiments, whether explicitly or not explicitly described.

[0058] It should be easily understood that “on,” “above,” and “over” in the present disclosure should be interpreted in the broadest manner, so that “on” not only means “directly on something,” but also includes the meaning of “on something” with intervening features or layers therebetween, and “above” or “over” not only includes the meaning of “above” or “over,” but also may include the meaning of “above” or “over something” with no intervening features or layers therebetween (i.e., directly on something).

[0059] In addition, spatially relative terms, such as "below," "below," "beneath," "above," "above," etc., may be used herein for ease of description to describe the relationship of one element or feature relative to other elements or features as shown in the figures. Spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation shown in the figures. The device may have other orientations (rotated 90 degrees or at other orientations), and the spatially relative descriptors used herein may likewise be interpreted accordingly.

[0060] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A heat exchange tube, characterized in that: include: a tubular body having an inner wall and an outer wall; and A plurality of fins are distributed at intervals on the outer wall of the tube body, the fins are arc-shaped and extend along the circumference of the tube body, the gap between the fins and the outer wall forms a cavity of the vaporization core, and at least two arc-shaped holes are provided on the side of the fin facing the tube body, the curvature of the at least two arc-shaped holes gradually increases along the arc length direction away from the wing root, and is used to guide the bubbles to grow gradually.

2. The heat exchange tube according to claim 1, characterized in that: The plurality of fins are distributed in a plurality of rows at intervals on the outer wall of the tube body along the circumference of the tube body, and the fins in each row are distributed in an axial direction of the tube body at intervals.

3. The heat exchange tube according to claim 2, characterized in that: The extending directions of the multiple rows of fins are the same, and the curvatures of the fins and the corresponding tubes are substantially the same.

4. The heat exchange tube according to claim 1, characterized in that: A wing portion is formed between two adjacent arc-shaped holes. The wing portion is protruded toward the tube body and extends along the radial direction of the tube body.

5. The heat exchange tube according to claim 4, characterized in that: The width of the arc-shaped hole along the arc length direction of the fin is 0.03 mm to 0.6 mm, and the maximum distance between the arc-shaped hole and the outer wall is 0.1 mm to 0.8 mm.

6. The heat exchange tube according to claim 1, characterized in that: The outer wall of the tube body is provided with a wavy structure, which extends from the fin roots along the circumference of the tube body. In the circumference of the tube body, a first distance between two adjacent fins is equal to a second distance between two adjacent wavy structures.

7. The heat exchange tube according to claim 6, characterized in that: The wavy structure includes convex parts and concave parts that are staggeredly distributed along the axial direction. The top shape of the convex part and the bottom shape of the concave part are both arcs, and the concave part forms a cavity that is the core of the vaporization of the liquid working medium.

8. The heat exchange tube according to claim 7, characterized in that: The depth of the concave portion is 0.002 mm to 0.18 mm, and the width of the concave portion along the axial direction is 0.003 mm to 0.2 mm; The height of the protrusion is 0.002 mm to 0.18 mm, and the width of the protrusion along the axial direction is 0.003 mm to 0.2 mm.

9. The heat exchange tube according to claim 1, characterized in that: The inner wall of the tube body is provided with a plurality of rows of teeth, and an angle is formed between the arrangement direction of each row of teeth and the axial direction of the tube body, and the value range of the angle is 0-80°.

10. The heat exchange tube according to claim 9, characterized in that: The tooth portion is in the shape of a quadrangular pyramid, the bottom of the quadrangular pyramid is connected to the inner wall, and the side length of the bottom is 0.15 mm to 0.4 mm, and the height of the quadrangular pyramid is 0.25 mm to 0.5 mm.

11. A steam generating device, characterized in that: The heat exchange tube comprises the heat exchange tube according to any one of claims 1 to 10.

12. A refrigeration device, characterized in that: Comprising the steam generating device as claimed in claim 11.

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