A high-efficiency heat transfer tube for evaporator

Abstract

The present invention relates to the technical field of evaporators, and in particular to a high-efficiency heat transfer tube for an evaporator, comprising: a U-shaped tube, connecting ends arranged at both ends of the U-shaped tube, and a fixing frame for connecting the U-shaped tube and the connecting ends, wherein the U-shaped tube comprises long straight portions at both sides and a curved portion connected between the two long straight portions; a rotating assembly is respectively arranged between the two ends of the U-shaped tube and the two connecting ends, and the rotating assembly is connected between the U-shaped tube and the connecting ends; the rotating assembly comprises a rotating tube, and the rotating tube is rotatably connected between the end of the U-shaped tube and the connecting ends; a flow guide assembly is arranged outside the rotating tube, and the rotating tube drives the flow guide assembly to rotate, and the flow guide assembly comprises a flow guide plate, and a plurality of the flow guide plates are annularly arranged outside the long straight portion. The present invention can quickly guide out bubbles and replace liquid, thereby improving the heat exchange effect of the heat transfer tube.

Description

Technical Field

[0001] The invention relates to the technical field of evaporators, and in particular to a high-efficiency heat transfer tube for an evaporator. Background Art

[0002] The evaporator heat transfer tube is an important part of the evaporator, and its main function is to perform heat exchange. The heat transfer method of the evaporator is mainly to transfer heat convection to the fins of the heat transfer tube, and then to the inner wall of the evaporator tube through heat conduction, and finally transfer the heat to the refrigerant, causing it to absorb heat and evaporate.

[0003] The Chinese patent with patent number CN101556125B discloses an evaporator heat transfer tube, including a fin portion arranged on the outer surface and an inner tooth portion arranged on the inner surface. The fin portion of the evaporator heat transfer tube is provided with fin grooves and evaporation chambers, which increase the heat exchange area and the number of vaporization cores of the heat transfer tube. The design of the inner teeth of the inner tooth portion reduces the laminar flow effect of the refrigerant, enhances the turbulence, and greatly enhances the boiling heat transfer performance.

[0004] After increasing the number of vaporization cores, a large number of bubbles will be generated on the outer surface of the heat transfer tube. However, due to the design of the evaporation chamber, some bubbles cannot be quickly discharged, resulting in the refrigerant being unable to quickly enter the evaporation chamber, reducing the replacement efficiency of the refrigerant inside the evaporation chamber. Summary of the invention

[0005] The purpose of the present invention is to solve the problem in the prior art that some bubbles cannot be quickly discharged, resulting in the refrigerant being unable to quickly enter the evaporation chamber, reducing the replacement efficiency of the refrigerant in the evaporation chamber, and to propose a high-efficiency heat transfer tube for an evaporator.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A high-efficiency heat transfer tube for an evaporator, comprising: a U-shaped tube, connecting ends arranged at both ends of the U-shaped tube, and a fixing frame for connecting the U-shaped tube and the connecting ends, wherein the U-shaped tube comprises long straight portions at both sides and a curved portion connected between the two long straight portions;

[0008] Rotating components are respectively arranged between the two ends of the U-shaped tube and the two connecting ends, and the rotating components are connected between the U-shaped tube and the connecting ends;

[0009] The rotating assembly includes a rotating tube, and the rotating tube is rotatably connected between the end of the U-shaped tube and the connecting end;

[0010] A guide assembly is arranged on the outside of the rotating tube, and the rotating tube drives the guide assembly to rotate. The guide assembly includes a guide plate, and a plurality of the guide plates are arranged in a ring shape on the outside of the long straight portion to form a truncated cone-shaped guide column ring, and the bottom area on the side close to the connecting end is large. The guide plate is arranged obliquely, and the cross-sectional length of the guide plate close to the connecting end is greater than the cross-sectional length of the other end. When the guide column ring rotates, the refrigerant forms a vortex from the connecting end toward the curved portion.

[0011] Preferably, the guide assembly also includes two fixed rings, multiple connecting frames and a rotating ring. The two fixed rings have different diameters and are respectively fixed at both ends of multiple guide plates. The rotating ring is rotatably connected to one end of the long straight portion away from the connecting end. The multiple connecting frames are respectively fixedly connected to the inner sides of the two fixed rings, and the other ends are respectively connected to the rotating ring or the fixed ring.

[0012] Preferably, the rotating assembly also includes two rotating rings and a plurality of blades, the two rotating rings are respectively fixedly connected to the two ends of the rotating tube, and are respectively rotatably connected to the U-shaped tube end and the connecting end, the plurality of blades are annularly fixedly connected to the inner side of the rotating tube, and the blades are driven to rotate when the refrigerant flows, the connecting end is inclined toward the middle at one end close to the rotating tube to form a truncated cone guide port, and a truncated cone guide space is formed inside the plurality of blades, and the guide space has a larger area at the end close to the connecting end.

[0013] Preferably, the guide plate is an arc-shaped long strip, and the two sides of the side away from the U-shaped tube are set as inclined edges. The side of the guide plate close to the U-shaped tube is an inwardly concave arc, and a strip-shaped air outlet is opened in the middle.

[0014] Preferably, a fin portion is provided on the outer side of the long straight portion of the U-shaped tube, and the fin portion is used to increase the number of gasification cores.

[0015] Preferably, the fin portion includes a first fin, a second fin and a third fin, a plurality of the first fins are fixedly connected in a ring shape on the outside of the long straight portion to form a fin tube, an evaporation groove is formed between two adjacent first fins, and the second fin and the third fin are fixedly connected inside the evaporation groove and divide the evaporation groove into a plurality of evaporation chambers.

[0016] Preferably, a plurality of spiral guide grooves are annularly opened on the fin tube, and the spiral guide grooves separate the plurality of first fins to form a plurality of fin blocks, and the opening direction of the spiral guide grooves is consistent with the rotation direction of the guide column ring.

[0017] Preferably, the width of the second fin is smaller than the width of the third fin, the second fin and the third fin are tilted and fixedly connected inside the evaporation tank, the second fin and the third fin are tilted toward the rotation direction of the guide column ring, and the upper end of the second fin is away from the adjacent first fin, and the upper end of the third fin is close to the adjacent first fin.

[0018] Preferably, an internal tooth portion is provided inside the long straight portion, and the internal tooth portion is used for disturbing the flow of the refrigerant. The internal tooth portion includes spiral internal teeth and guide holes. A plurality of the spiral internal teeth are equidistantly annularly fixedly connected to the inner wall of the long straight portion, and a plurality of the guide holes are staggeredly opened on the plurality of spiral internal teeth.

[0019] Preferably, the rotation direction of the spiral internal teeth is consistent with the rotation direction of the blades, the cross section of the spiral internal teeth is an inclined cross section, and an arc-shaped inner groove is provided on one side of the spiral internal teeth close to the connecting end.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] The two ends of the U-shaped tube are used for the introduction and export of the refrigerant respectively. At the introduction end of the refrigerant, the introduction of the refrigerant drives the rotating component to rotate. The introduction end can speed up the introduction of the refrigerant, and the other end can speed up the export of the refrigerant, which enhances the heat exchange effect and improves the start-up speed of the evaporator.

[0022] The multiple guide plates rotate to form a flow vortex inside the guide column ring, and one port has a large diameter for introducing a large amount of refrigerant, and the other port has a small diameter for guiding out bubbles and refrigerant. The bubbles are quickly guided out through the flow vortex, and at the same time, due to the formation of the vortex, the bubbles can be quickly thrown outward, thereby improving the rapid guidance of the evaporation bubbles outside the long straight part and the replacement speed of the refrigerant. The present invention can quickly guide out bubbles and replace liquid, thereby improving the heat exchange effect of the heat transfer tube;

[0023] When the blades rotate, the movement of the refrigerant is affected by the rotation of the blades, so that the refrigerant can spiral into the rotating tube. The refrigerant spirally entering the rotating tube will move toward the inner wall of the long straight part under the action of rotation. At the same time, when the heat of the refrigerant in contact with the inner wall of the long straight part decreases, the low-temperature refrigerant will move to the middle, thereby continuously rotating the high-temperature refrigerant to the outside (such as the working principle of the vortex tube), ensuring the heat exchange efficiency of the refrigerant in the entire long straight part;

[0024] The inclined edge on the outside of the guide plate can reduce the resistance generated during the rotation process. At the same time, the bubbles on the inside will push the movement of the guide plate during the gathering process. Thus, while ensuring the rotation of the rotating tube, the bubbles push the guide plate to ensure the rotation of the guide plate, thereby accelerating the replacement efficiency of the refrigerant inside the guide column ring.

[0025] The outer side of the long straight portion is divided into a plurality of evaporation chambers by the first fin, the second fin and the third fin, thereby increasing the heat exchange area, increasing the number of vaporization cores, greatly enhancing the vaporization cores required for bubble nucleus boiling, making it easier for the refrigerant liquid to form nuclei and vaporize, and accelerating the vaporization process. In addition, the evaporation chamber with the cavity opening facing upward can form bubble aggregation after the bubbles are generated by means of the flow channel structure, and perform large-area micro-layer evaporation of the bubble bottom liquid, thereby greatly enhancing the boiling heat transfer performance;

[0026] During the flow of the refrigerant, the guide column ring drives the refrigerant to move from the connection end to the curved portion in a directional liquid flow, and the bubbles inside the steam chamber can be quickly pushed and guided out by the liquid flow, and the threaded guide groove arranged by the thread can divert the liquid flow, thereby diverting the liquid flow entering the inner side of the evaporation chamber, thereby improving the efficiency of pushing the bubbles;

[0027] The second fin and the third fin are arranged obliquely and have different lengths. The outlet at the upper end of the evaporation chamber formed between the third fin and the first fin is smaller, resulting in the impact force generated by the refrigerant impacting the inside being slightly greater than that of the other two evaporation chambers. During the flow of the refrigerant, it will follow the spiral guide groove into the inside of the two adjacent first fins, thereby impacting the second fin and the third fin in contact. Moreover, since the contact surface is arranged obliquely upward, the bubbles generated by evaporation will be impacted upward during the impact process, so that the bubbles will quickly leave the evaporation chamber, replace the refrigerant in the evaporation chamber, and improve the efficiency of heat exchange.

[0028] The refrigerant liquid flow introduced into the long straight part through the rotating component enters in a spiral manner. In order to ensure that the liquid flow on the inner wall of the long straight part and the liquid flow in the middle part offset the turbulent flow, spiral internal teeth are arranged to ensure that while the outer liquid flow rotates, part of the refrigerant liquid is flushed out through the guide holes, so that the refrigerant offsets the liquid flow rotating on the inner wall and the liquid flow in the middle, thereby improving the internal and external replacement of the internal refrigerant, ensuring the heat of the refrigerant on the outside, and thus improving the heat replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic diagram of the structure of a curved portion of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0030] Figure 2 This is a schematic diagram of the front structure of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0031] Figure 3 This is a schematic diagram of the long straight portion structure of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0032] Figure 4 This is a schematic diagram of the internal structure of a long straight portion of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0033] Figure 5 This is a schematic diagram of the unfolded structure of the long straight portion of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0034] Figure 6 This is a schematic structural diagram of a flow guide assembly of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0035] Figure 7 This is a schematic diagram of the structure of a guide plate of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0036] Figure 8 This is a schematic cross-sectional view of a fin portion of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0037] Fig. 9 This is a schematic diagram of the structure of the fin portion of a high-efficiency heat transfer tube for an evaporator proposed by the present invention;

[0038] Fig.10 This is a schematic diagram of the internal tooth structure of a high-efficiency heat transfer tube for an evaporator proposed by the present invention.

[0039] In the figure: 1 U-shaped tube, 101 long straight portion, 102 curved portion, 2 connecting end, 3 fixed frame, 4 rotating component, 41 rotating tube, 42 rotating ring, 43 blade, 5 guide component, 51 guide plate, 52 fixed ring, 53 connecting frame, 6 fin portion, 61 first fin, 62 second fin, 63 third fin, 7 spiral guide groove, 8 internal tooth portion, 81 spiral internal teeth, 82 guide hole, 9 air outlet. DETAILED DESCRIPTION

[0040] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0041] The terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not used to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as the scope of the present invention without substantially changing the technical content.

[0042] Reference Figure 1-Figure 10 , a high-efficiency heat transfer tube for an evaporator, comprising: a U-shaped tube 1, connecting ends 2 arranged at both ends of the U-shaped tube 1 and a fixing frame 3 for connecting the U-shaped tube 1 and the connecting ends 2, wherein the U-shaped tube 1 comprises long straight portions 101 on both sides and a curved portion 102 connected between the two long straight portions 101;

[0043] Rotating components 4 are respectively arranged between the two ends of the U-shaped tube 1 and the two connecting ends 2, and the rotating components 4 are connected between the U-shaped tube 1 and the connecting ends 2;

[0044] The rotating assembly 4 includes a rotating tube 41, and the rotating tube 41 is rotatably connected between the end of the U-shaped tube 1 and the connecting end 2;

[0045] A guide assembly 5 is arranged on the outside of the rotating tube 41, and the rotating tube 41 drives the guide assembly 5 to rotate. The guide assembly 5 includes a guide plate 51. A plurality of the guide plates 51 are arranged in a ring on the outside of the long straight portion 101 to form a truncated cone-shaped guide column ring, and the bottom area on the side close to the connecting end 2 is large. The guide plate 51 is arranged obliquely, and the cross-sectional length of the guide plate 51 close to the connecting end 2 is greater than the cross-sectional length of the other end. When the guide column ring rotates, the refrigerant forms a vortex from the connecting end 2 toward the curved portion 102.

[0046] In the embodiment of the above technical solution, the two ends of the U-shaped tube 1 are respectively used for the introduction and export of the refrigerant. At the introduction end of the refrigerant, the introduction of the refrigerant drives the rotating assembly 4 to rotate. The introduction end can speed up the introduction of the refrigerant, and the other end can speed up the export of the refrigerant, which enhances the heat exchange effect and improves the start-up speed of the evaporator.

[0047] Multiple guide plates 51 rotate to form a flow vortex inside the guide column ring, and one port has a large diameter for introducing a large amount of refrigerant, and the other port has a small diameter for guiding out bubbles and refrigerant. The bubbles are quickly guided out by the flow vortex, and at the same time, due to the formation of the vortex, the bubbles can be quickly thrown outward, thereby improving the rapid guidance of evaporating bubbles on the outside of the long straight portion 101 and the replacement speed of the refrigerant. The present invention can quickly guide out bubbles and replace liquid, thereby improving the heat exchange effect of the heat transfer tube.

[0048] The preferred technical solution in this embodiment is:

[0049] Reference Figure 3-6 The guide assembly 5 further includes two fixed rings 52, a plurality of connecting frames 53 and a rotating ring 42. The two fixed rings 52 have different diameters and are respectively fixed at both ends of the plurality of guide plates 51. The rotating ring 42 is rotatably connected to one end of the long straight portion 101 away from the connecting end 2. The plurality of connecting frames 53 are respectively fixedly connected to the inner sides of the two fixed rings 52, and the other ends are respectively connected to the rotating ring 42 or the fixed ring 52.

[0050] The multiple guide plates 51 are fixed by the fixing rings 52 at both ends, and the guide assembly 5 is fixed on the rotating tube 41 by multiple connecting frames 53. When the rotating tube 41 rotates, the connecting frame 53 and the fixing ring 52 are driven to rotate, thereby rotating the guide plate 51, and the guide column ring causes the refrigerant to form a vortex.

[0051] Reference Figure 5-6 The rotating assembly 4 also includes two rotating rings 42 and a plurality of blades 43. The two rotating rings 42 are respectively fixedly connected to the two ends of the rotating tube 41, and are respectively rotatably connected to the end of the U-shaped tube 1 and the connecting end 2. The plurality of blades 43 are annularly fixedly connected to the inner side of the rotating tube 41, and the blades 43 are driven to rotate when the refrigerant flows. The end of the connecting end 2 close to the rotating tube 41 is inclined toward the middle to form a truncated cone guide port. A truncated cone guide space is formed inside the plurality of blades 43, and the guide space has a large area close to the end of the connecting end 2.

[0052] After the refrigerant is introduced into the rotating tube 41 through the truncated cone-shaped guide port of the connecting end 2, the refrigerant is squeezed into the rotating tube 41, increasing the flow speed. The flowing refrigerant causes flow impact on the multiple blades 43, driving the multiple blades 43 to rotate, thereby driving the rotating tube 41 to rotate;

[0053] After the blades 43 rotate, the movement of the refrigerant is affected by the rotation of the blades 43, so that the refrigerant can spiral into the rotating tube 41. The refrigerant spirally entered into the rotating tube 41 will move toward the inner wall of the long straight portion 101 under the action of rotation. At the same time, when the heat of the refrigerant in contact with the inner wall of the long straight portion 101 is reduced, the low-temperature refrigerant will move to the middle, thereby continuously rotating the high-temperature refrigerant toward the outside (such as the working principle of the vortex tube), thereby ensuring the heat exchange efficiency of the refrigerant in the entire long straight portion 101.

[0054] Reference Figure 7 The guide plate 51 is an arc-shaped long strip, and the two sides of the side away from the U-shaped tube 1 are set as inclined edges. The side of the guide plate 51 close to the U-shaped tube 1 is an inwardly concave arc, and a strip-shaped air outlet 9 is opened in the middle;

[0055] The long strip-shaped guide plate 51 is consistent with the length of the long straight portion 101, so as to ensure the collection and discharge of bubbles generated on the long straight portion 101. When the refrigerant outside the long straight portion 101 is largely gasified, the bubbles will be transferred to the inside of the guide column ring and blocked by the guide plate 51. Since the inside of the guide plate 51 is set in an arc shape, the bubbles are collected and aggregated, and finally discharged through the outlet 9.

[0056] The inclined edge on the outside of the guide plate 51 can reduce the resistance generated during rotation. At the same time, the bubbles on the inside will push the movement of the guide plate 51 during the gathering process. Therefore, while ensuring the rotation of the rotating tube 41, the bubbles push the guide plate 51, thereby ensuring the rotation of the guide plate 51 and accelerating the replacement efficiency of the refrigerant inside the guide column ring.

[0057] Reference Figure 8-9 The long straight portion 101 of the U-shaped tube 1 is provided with a fin portion 6 on the outside, and the fin portion 6 is used to increase the number of gasification cores;

[0058] The fin portion 6 includes a first fin 61, a second fin 62 and a third fin 63, a plurality of the first fins 61 are annularly fixedly connected to the outside of the long straight portion 101 to form a fin tube, an evaporation groove is formed between two adjacent first fins 61, and the second fin 62 and the third fin 63 are fixedly connected inside the evaporation groove and divide the evaporation groove into a plurality of evaporation chambers;

[0059] The fin tube is provided with a plurality of spiral guide grooves 7 in an annular shape, and the spiral guide grooves 7 separate the plurality of first fins 61, thereby forming a plurality of fin blocks. The opening direction of the spiral guide grooves 7 is consistent with the rotation direction of the guide column ring;

[0060] The width of the second fin 62 is smaller than that of the third fin 63. The second fin 62 and the third fin 63 are fixedly connected inside the evaporation tank at an angle. The second fin 62 and the third fin 63 are inclined toward the rotation direction of the guide column ring, and the upper end of the second fin 62 is far away from the adjacent first fin 61, and the upper end of the third fin 63 is close to the adjacent first fin 61.

[0061] The outer side of the long straight portion 101 is divided into a plurality of evaporation chambers by the first fin 61, the second fin 62 and the third fin 63, thereby increasing the heat exchange area, increasing the number of vaporization cores, greatly enhancing the vaporization cores required for bubble nucleus boiling, making it easier for the refrigerant liquid to nucleate and vaporize, and accelerating the vaporization process. In addition, the evaporation chamber with the cavity opening facing upward can form bubble aggregation after the bubbles are generated by means of the flow channel structure, and perform large-area micro-layer evaporation of the bubble bottom liquid, thereby greatly enhancing the boiling heat transfer performance;

[0062] During the flow of the refrigerant, the refrigerant is driven by the guide column ring to move from the connection end 2 to the curved portion 102 in a directional liquid flow, and the bubbles inside the steam chamber can be quickly pushed and guided out by the liquid flow, and the threaded guide groove arranged by the thread can divert the liquid flow, thereby diverting the liquid flow entering the inner side of the evaporation chamber, thereby improving the efficiency of pushing the bubbles;

[0063] The second fin 62 and the third fin 63 are arranged at an angle and have different lengths. The outlet at the upper end of the evaporation chamber formed between the third fin 63 and the first fin 61 is smaller, resulting in the impact force generated by the refrigerant impacting the inside being slightly larger than that of the other two evaporation chambers. During the flow of the refrigerant, it will follow the spiral guide groove 7 into the interior of the two adjacent first fins 61, thereby impacting the second fin 62 and the third fin 63 that it contacts. Moreover, since the contact surface is arranged at an angle upward, the bubbles generated by evaporation will be impacted upward during the impact process, so that the bubbles will quickly leave the evaporation chamber, replace the refrigerant inside the evaporation chamber, and improve the heat exchange efficiency.

[0064] Reference Fig.10 The inner tooth portion 8 is provided inside the long straight portion 101, and the inner tooth portion 8 is used for disturbing the flow of the refrigerant. The inner tooth portion 8 includes a spiral inner tooth 81 and a guide hole 82. A plurality of the spiral inner teeth are equidistantly annularly fixedly connected to the inner wall of the long straight portion 101, and a plurality of the guide holes 82 are staggeredly opened on the plurality of spiral inner teeth;

[0065] The rotation direction of the spiral internal teeth 81 is consistent with the rotation direction of the blades 43. The cross section of the spiral internal teeth 81 is an inclined trapezoidal cross section. The side of the spiral internal teeth close to the connecting end 2 is provided with an arc-shaped inner groove.

[0066] Since the refrigerant liquid flow introduced into the long straight portion 101 through the rotating component 4 enters in a spiral manner, in order to ensure that the liquid flow on the inner wall of the long straight portion 101 and the liquid flow in the middle offset the turbulent flow, a spiral inner tooth 81 is provided. While ensuring the rotation of the outer liquid flow, part of the refrigerant liquid is flushed out through the guide hole 82, so that the refrigerant offsets the liquid flow rotating on the inner wall and the liquid flow in the middle, thereby improving the internal and external replacement of the internal refrigerant, ensuring the heat of the refrigerant on the outside, and thus improving the heat replacement.

[0067] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A high-efficiency heat transfer tube for an evaporator, comprising: A U-shaped tube, connecting ends arranged at both ends of the U-shaped tube, and a fixing frame for connecting the U-shaped tube and the connecting ends, wherein the U-shaped tube includes long straight portions on both sides and a curved portion connected between the two long straight portions; Rotating components are respectively arranged between the two ends of the U-shaped tube and the two connecting ends, and the rotating components are connected between the U-shaped tube and the connecting ends; The rotating assembly includes a rotating tube, and the rotating tube is rotatably connected between the end of the U-shaped tube and the connecting end; A guide assembly is arranged on the outside of the rotating tube, and the rotating tube drives the guide assembly to rotate. The guide assembly includes a guide plate, and a plurality of the guide plates are arranged in a ring shape on the outside of the long straight portion to form a truncated cone-shaped guide column ring, and the bottom area on the side close to the connecting end is large. The guide plate is arranged obliquely, and the cross-sectional length of the guide plate close to the connecting end is greater than the cross-sectional length of the other end. When the guide column ring rotates, the refrigerant forms a vortex from the connecting end toward the curved portion.

2. The high-efficiency heat transfer tube for evaporator according to claim 1, characterized in that: The guide assembly also includes two fixed rings, multiple connecting frames and a rotating ring. The two fixed rings have different diameters and are respectively fixed at the two ends of multiple guide plates. The rotating ring is rotatably connected to one end of the long straight part away from the connecting end. The multiple connecting frames are respectively fixedly connected to the inner sides of the two fixed rings, and the other ends are respectively connected to the rotating ring or the fixed ring.

3. The high-efficiency heat transfer tube for evaporator according to claim 1, characterized in that: The rotating assembly also includes two rotating rings and multiple blades. The two rotating rings are respectively fixedly connected to the two ends of the rotating tube, and are respectively rotatably connected to the U-shaped tube end and the connecting end. The multiple blades are annularly fixedly connected to the inner side of the rotating tube, and the blades are driven to rotate when the refrigerant flows. The connecting end is inclined toward the middle at one end close to the rotating tube to form a truncated cone guide port, and a truncated cone guide space is formed inside the multiple blades. The guide space has a larger area at the end close to the connecting end.

4. The high-efficiency heat transfer tube for evaporator according to claim 1, characterized in that: The guide plate is an arc-shaped long strip, and the two sides of the side away from the U-shaped tube are set as inclined edges. The side of the guide plate close to the U-shaped tube is an inwardly concave arc, and a strip air outlet is opened in the middle.

5. The high-efficiency heat transfer tube for evaporator according to claim 1, characterized in that: The long straight portion of the U-shaped tube is provided with a fin portion outside, and the fin portion is used to increase the number of gasification cores.

6. The high-efficiency heat transfer tube for evaporator according to claim 5, characterized in that: The fin portion includes a first fin, a second fin and a third fin. A plurality of the first fins are fixedly connected in a ring shape to the outside of the long straight portion to form a fin tube. An evaporation groove is formed between two adjacent first fins. The second fin and the third fin are fixedly connected inside the evaporation groove and divide the evaporation groove into a plurality of evaporation chambers.

7. The high-efficiency heat transfer tube for evaporator according to claim 6, characterized in that: The fin tube is provided with a plurality of spiral guide grooves in an annular shape, and the spiral guide grooves separate the plurality of first fins to form a plurality of fin blocks. The opening direction of the spiral guide grooves is consistent with the rotation direction of the guide column ring.

8. The high-efficiency heat transfer tube for evaporator according to claim 6, characterized in that: The width of the second fin is smaller than that of the third fin. The second fin and the third fin are tilted and fixedly connected inside the evaporation tank. The second fin and the third fin are tilted toward the rotation direction of the guide column ring. The upper end of the second fin is away from the adjacent first fin, and the upper end of the third fin is close to the adjacent first fin.

9. The high-efficiency heat transfer tube for evaporator according to claim 1, characterized in that: An inner tooth portion is arranged inside the long straight portion, and the inner tooth portion is used for disturbing the flow of the refrigerant. The inner tooth portion includes spiral inner teeth and guide holes. A plurality of the spiral inner teeth are equidistantly annularly fixedly connected to the inner wall of the long straight portion, and a plurality of the guide holes are staggeredly opened on the plurality of spiral inner teeth.

10. The high-efficiency heat transfer tube for evaporator according to claim 9, characterized in that: The rotation direction of the spiral internal teeth is consistent with the rotation direction of the blades. The cross section of the spiral internal teeth is an inclined trapezoidal cross section. An arc-shaped inner groove is provided on one side of the spiral internal teeth close to the connecting end.

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