CN213363533U - Heat exchange tube, heat exchanger and air conditioner - Google Patents

Abstract

The utility model provides a heat exchange tube, heat exchanger and air conditioner, the heat exchange tube includes: the outer wall surface of the tube base body is provided with a first fin and a second fin; the first fin comprises a fin root part vertical to the outer wall surface of the tube base body and a fin part parallel to the outer wall surface of the tube base body; the second fin is arranged on the tube base body covered by the fin part, the tail end of the second fin penetrates out of the fin part, and the fin part is provided with a first cut part for the second fin to penetrate through. The heat exchange tube of the present disclosure significantly increases the heat exchange area outside the heat exchange tube. The design of the first cut-out portion extending upward from the tube base through the first fin makes full use of the machinable space on the surface of the heat exchange tube. Under the refrigeration working condition, the semi-closed structure formed by the first fins is beneficial to evaporation of liquid refrigerants, and the second fins increase the degree of surface unevenness to strengthen heat exchange. In the heating condition, the second fins can rapidly puncture the condensate film, and the condensate can be rapidly discharged to the outer wall surface of the tube base body.

Description

Heat exchange tube, heat exchanger and air conditioner

Technical Field

The utility model belongs to the technical field of the heat transfer, concretely relates to heat exchange tube, heat exchanger and air conditioner.

Background

In the central air-conditioning water-cooling heat pump heat exchanger, the heat exchange coefficient in the pipe is improved through the strengthening of the internal thread structure in the pipe. Due to the limitation of the existing extrusion forming process in the heat exchange tube, which can be economically processed in a large scale, the efficiency in the heat exchange tube is improved to a limited extent. Outside the heat exchange tube, due to the switchable particularity of the refrigeration and heating conditions of the working condition of the heat pump, the fin type outside the heat exchange tube is required to have a structure meeting the requirements of enhanced evaporation and enhanced condensation. According to the existing evaporation and condensation theory, the enhanced evaporation fin type tends to form a semi-closed cavity structural feature, and the enhanced condensation fin type tends to form a structural feature with a thin and high sharp point. The former is favorable for the nucleation and growth of bubbles, and the latter is favorable for the quick discharge of condensate.

The known heat exchange tube can not meet the requirements of enhanced evaporation and enhanced condensation, and the structure needs to be optimized.

Disclosure of Invention

Therefore, the technical problem to be solved by the present disclosure is that the known heat exchange tube cannot meet the requirements of enhanced evaporation and enhanced condensation, and the structure needs to be optimized, so as to provide a heat exchange tube, a heat exchanger and an air conditioner.

In order to solve the above problem, the present disclosure provides a heat exchange tube comprising:

a tube base;

the outer wall surface of the tube base body is provided with a first fin and a second fin;

the first fin comprises a fin root part vertical to the outer wall surface of the tube base body and a fin part parallel to the outer wall surface of the tube base body, and the fin part is arranged at the tail end of the fin root part;

the second fin is arranged on the tube base body covered by the fin part, the tail end of the second fin penetrates out of the fin part, and the fin part is provided with a first cut part for the second fin to penetrate through.

The purpose of the present disclosure and the technical problems solved thereby can be further achieved by the following technical measures.

Optionally, a fin tip portion is arranged on a side surface of the fin portion, which faces away from the tube base body, and the fin tip portion is arranged perpendicular to the outer wall surface of the tube base body.

Optionally, the dimension of the fin root along the axial direction of the tube base is the thickness L1 of the fin root, and L1 is 0.05mm-0.2 mm; the dimension of the second fin in the axial direction of the tube base is the thickness L2 of the second fin, and L2 is 0.05mm-0.2 mm; the dimension of the fin tip portion in the axial direction of the tube base body is a thickness L6 of the fin tip portion, and L6 is 0.05mm-0.2 mm.

Optionally, a dimension of the fin tip portion in a direction perpendicular to the outer wall surface of the tube base is a thickness H4 of the fin tip portion, and satisfies H4-0.05 mm-0.2 mm.

Optionally, the dimension of the first fin in the axial direction of the tube base is the thickness L3 of the first fin, and L3 is 0.1mm to 0.4 mm.

Optionally, the distance from the end of the second fin to the outer wall surface of the tube base is the height H2 of the second fin, and the distance from the end of the fin tip to the outer wall surface of the tube base is the height H1 of the first fin, so that H1-H2-0.5 mm-1.2mm are satisfied.

Optionally, the distance from the end of the fin tip to the side of the fin portion facing away from the tube base is the height H3 of the fin tip, and H3 is 0.1mm to 0.5 mm.

Optionally, a projection of the fin tip and the fin root on the outer wall surface of the tube base is a distance L4 along the axial direction of the tube base, where L4 is 0.055mm-0.2 mm.

Optionally, a projection of the second fin and the fin root on the outer wall surface of the tube base is a distance L5 in the axial direction of the tube base, where L5 is 0.125mm to 0.25 mm.

Optionally, the dimension of the first notch portion in the axial direction of the tube base is a depth L7 of the first notch portion, and L7 is 0.05mm to 0.35 mm.

Optionally, a second cut-out portion is provided on the wingtip portion.

Optionally, the dimension of the second notch in the direction perpendicular to the outer wall surface of the tube base is a depth H5 of the second notch, and H5 is 0.05mm to 0.5 mm; the dimension of the bottom of the second cut-out part along the circumferential direction of the tube base body is the bottom width L11 of the second cut-out part, and L11 is 0.02mm-0.2 mm; an angle θ 1 between both side walls of the second notch portion satisfies θ 1 of 0 to 90 °.

Optionally, a pit structure is further arranged on the outer wall surface of the tube base body covered by the fin portion.

Optionally, the number of the first fins is multiple, and the multiple first fins are circumferentially arranged along the outer wall surface of the tube base and respectively extend spirally on the outer wall surface of the tube base along the axis of the tube base; the plurality of second fins are circumferentially arranged along the outer wall surface of the tube base body and spirally extend on the outer wall surface of the tube base body along the axis of the tube base body respectively;

the number of the first fins is equal to the number of the second fins.

Optionally, a third cut portion is arranged between two adjacent fin tip portions, and the dimension of the third cut portion in the direction perpendicular to the outer wall surface of the tube base is the depth H6 of the third cut portion, so that H6 is 0.05mm-0.5 mm; the dimension of the bottom of the third cut-out portion in the circumferential direction of the tube base body is the bottom width L12 of the third cut-out portion, and L12 is 0.02mm-0.2 mm; an angle θ 2 between both side walls of the third cutout portion satisfies θ 2 of 0 to 90 °.

Optionally, the center-to-center distance L10 between two adjacent second notch portions satisfies L10-0.3 mm-1.2 mm.

Optionally, the distance L8 between two adjacent second fins satisfies that L8 is 0.3mm to 1.2 mm.

Optionally, the first cut-off portion is at least one of trapezoid, arc and V-shaped.

Optionally, a flow guide groove is arranged on the side of the fin portion, which faces away from the tube base body, and the flow guide groove is at least one of linear, V-shaped and X-shaped.

Optionally, the interior of the pipe base body is avoided being provided with a plurality of inner rib structures, and the plurality of inner rib structures are circumferentially arranged along the inner wall surface of the pipe base body and respectively extend spirally on the inner wall surface of the pipe base body along the axis of the pipe base body.

A heat exchanger adopts the heat exchange tube.

An air conditioner adopts foretell heat exchange tube.

The heat exchange tube, the heat exchanger and the air conditioner provided by the disclosure at least have the following beneficial effects:

the heat exchange tube disclosed by the invention adopts the combined structure of the inverted L-shaped first fin and the needle-shaped second fin, so that the heat exchange area outside the heat exchange tube is remarkably increased. The design of the first cut-out portion extending upward from the tube base through the first fin makes full use of the machinable space on the surface of the heat exchange tube.

Under the refrigeration working condition, the liquid refrigerant evaporates, and the semi-closed structure formed by the first fins is beneficial to the evaporation process of nucleation, growth and separation of the liquid refrigerant. The second fins with discontinuous thin heights increase the degree of surface unevenness at the position, become efficient refrigerant vaporization core points and further strengthen heat exchange.

In the heating condition, gaseous refrigerant outside the heat exchange tube is condensed, the second fins with discontinuous thin heights can quickly puncture a condensate film, and condensate generated by the second fins can be quickly discharged to the outer wall surface of the tube base body. The high-efficient condensation of gaseous refrigerant and the timely discharge of condensate have reduced the refrigerant and have piled up the thickness on the heat exchange tube surface, have reduced the thermal resistance of condensation, have promoted condensation heat exchange efficiency.

Drawings

FIG. 1 is a schematic structural view of a heat exchange tube of the present disclosure;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is a circumferential view of the heat exchange tube of the present disclosure along the tube base;

FIG. 4 is an axial view of a heat exchange tube of the present disclosure along the tube base;

FIG. 5 is a radial view of a heat exchange tube of the present disclosure along the tube base;

fig. 6 is a schematic structural view of a guide groove of the heat exchange tube of the present disclosure.

The reference numerals are represented as:

1. a tube base; 2. a first fin; 3. a second fin; 4. root of the wing; 5. a fin portion; 6. a first incision portion; 7. the tip of each wing; 8. a second cut-out portion; 9. a pit structure; 10. a third cut portion; 11. a diversion trench; 12. an inner rib structure.

Detailed Description

To make the objects, technical solutions and advantages of the present disclosure more apparent, the following embodiments of the present disclosure will be clearly and completely described in conjunction with the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

As shown in fig. 1 to 6, the present embodiment discloses a heat exchange tube, including: a tube base 1; the outer wall surface of the tube base body 1 is provided with a first fin 2 and a second fin 3; the first fin 2 comprises a fin root part 4 vertical to the outer wall surface of the tube base body 1 and a fin part 5 parallel to the outer wall surface of the tube base body 1, the fin part 5 is arranged at the tail end of the fin root part 4, and the fin part and the fin root part form a T-shaped structure; the second fin 3 is provided on the tube base 1 covered with the fin portion 5, and the tip of the second fin 3 is passed out of the fin portion 5, and the fin portion 5 is provided with a first notch portion 6 through which the second fin 3 is passed.

The heat exchange tube of the embodiment adopts the combined structure of the inverted L-shaped first fin 2 and the needle-shaped second fin 3, so that the heat exchange area outside the heat exchange tube is remarkably increased. The design of the first cutouts 6 extending upwardly from the tube base 1 through the first fins 2 takes full advantage of the space available for machining the surfaces of the heat exchange tubes.

Under the refrigeration working condition, the liquid refrigerant evaporates, and the semi-closed structure formed by the first fins 2 is beneficial to the evaporation process of nucleation, growth and separation of the liquid refrigerant. The second fins 3 which extend upwards and are discontinuous and thin increase the degree of surface unevenness at the position, become efficient refrigerant vaporization core points, and further strengthen heat exchange.

In the heating condition, gaseous refrigerant outside the heat exchange tube is condensed, the second fins 3 with discontinuous thin and high diameters can quickly puncture a condensate film, and condensate generated by the second fins can be quickly discharged to the outer wall surface of the tube substrate 1. The high-efficient condensation of gaseous refrigerant and the timely discharge of condensate have reduced the refrigerant and have piled up the thickness on the heat exchange tube surface, have reduced the thermal resistance of condensation, have promoted condensation heat exchange efficiency.

In some embodiments, the fin portion 5 is provided with a fin tip portion 7 on the side facing away from the tube base 1, and the fin tip portion 7 is provided perpendicular to the outer wall surface of the tube base 1. Under the heating working condition, the fin tip part 7 can rapidly puncture a condensate film, and the generated condensate can be rapidly discharged to the outer wall surface of the tube matrix 1.

In some embodiments, the dimension of the fin root 4 in the axial direction of the tube base 1 is the thickness L1 of the fin root 4, satisfying L1-0.05 mm-0.2 mm; the dimension of the second fins 3 in the axial direction of the tube base 1 is the thickness L2 of the second fins 3, and L2 is 0.05mm to 0.2 mm; the dimension of the fin tip portion 7 in the axial direction of the tube base 1 is the thickness L6 of the fin tip portion 7, and L6 is 0.05mm to 0.2 mm. In some embodiments, the dimension of the fin tip 7 in the direction perpendicular to the outer wall surface of the tube base 1 is a thickness H4 of the fin tip 7, and satisfies H4-0.05 mm-0.2 mm. When the shapes and the sizes of the first fin 2 and the second fin 3 are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has high evaporation and condensation performance.

In some embodiments, the heat exchange tube has the best effect when L1, L2, L6, H4 and H12 mm.

In some embodiments, the dimension of the first fin 2 in the axial direction of the tube base 1 is the thickness L3 of the first fin 2, and satisfies L3-0.1 mm-0.4 mm. When the shape and size of the fin are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has higher evaporation and condensation performances.

In some embodiments, the L3 is 0.25mm, which is the best effect of the heat exchange tube.

In some embodiments, the distance from the tip of the second fin 3 to the outer wall surface of the tube base 1 is the height H2 of the second fin 3, and the distance from the tip of the fin tip portion 7 to the outer wall surface of the tube base 1 is the height H1 of the first fin 2, so that H1-H2-1.2 mm are satisfied. When the shape and size of the fin are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has higher evaporation and condensation performances.

In some embodiments, the heat exchange tube is best when H1-H2-1.0 mm.

In some embodiments, the distance from the end of the fin tip 7 to the side of the fin section 5 facing away from the tube base 1 is the height H3 of the fin tip 7, satisfying H3-0.1 mm-0.5 mm. When the shape and size of the fin are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has higher evaporation and condensation performances.

In some embodiments, H3 is 0.4mm, which is the best effect of the heat exchange tube.

In some embodiments, a projection of the fin tip 7 and the fin root 4 on the outer wall surface of the tube base 1 has a distance L4 along the axial direction of the tube base 1, which satisfies L4-0.055 mm-0.2 mm. When the shape and size of the fin are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has higher evaporation and condensation performances.

In some embodiments, the L4 is 0.06mm, which is the best effect of the heat exchange tube.

In some embodiments, a projection of the second fin 3 and the fin root 4 on the outer wall surface of the tube base 1 has a distance L5 along the axial direction of the tube base 1, which satisfies L5-0.125 mm-0.25 mm. When the shape and size of the fin are in the range, the heat exchange tube is convenient to process, large-scale processing can be realized, and meanwhile, the heat exchange tube adopting the shape has higher evaporation and condensation performances.

In some embodiments, the L5 is 0.24mm, which is the best effect of the heat exchange tube.

In some embodiments, the dimension of the first notch portion 6 in the axial direction of the tube base 1 is the depth L7 of the first notch portion 6, and satisfies L7-0.05 mm-0.35 mm. When the shape and size of the fin are within the range, the heat exchange tube is convenient to process and can be processed on a large scale, meanwhile, the condensate on the second fin 3 can quickly reach the outer wall surface of the tube base body 1, and the heat exchange tube adopting the shape has high evaporation and condensation performance.

In some embodiments, the L7 is 0.18mm, which is the best effect of the heat exchange tube.

In some embodiments, the fin tip portion 7 is provided with the second notch portion 8, so that the fin tip portion 7 forms an intermittent pointed structure capable of rapidly puncturing the condensate film to enable the condensate film to rapidly flow down, and the surface roughness at the fin portion 5 is also increased to provide an efficient coolant vaporization core point.

In some embodiments, the dimension of the second cutout portion 8 in the direction perpendicular to the outer wall surface of the tube base 1 is the depth H5 of the second cutout portion 8, and satisfies H5-0.05 mm-0.5 mm; the dimension of the bottom of the second cutout portion 8 in the circumferential direction of the tube base 1 is the bottom width L11 of the second cutout portion 8, and L11 is 0.02mm to 0.2 mm; the angle θ 1 between the two side walls of the second notch portion 8 satisfies the condition that θ 1 is 0 to 90 °. When the shape of the second cut portion 8 is within the above range, the heat exchange tube is convenient to process, large-scale processing can be realized, the puncturing effect of the condensate film is the best, and the heat exchange tube adopting the shape has high evaporation and condensation performances.

In some embodiments, L11 is 0.1mm, and θ 1 is 45 °, so that the heat exchange tube has the best effect.

In some embodiments, the fin portion 5 covers the outer wall surface of the tube base 1 and is further provided with a pit structure 9. The pit structure 9 may be a rectangular pit, evenly distributed along the outer peripheral wall of the tube base 1. The pit structure 9 is arranged in the semi-closed structure formed by the first fins 2, so that the density of the vaporization core can be increased, and the heat exchange efficiency is enhanced.

In some embodiments, the first fins 2 are plural, and the plural first fins 2 are circumferentially arranged along the outer wall surface of the tube base 1 and spirally extend on the outer wall surface of the tube base 1 along the axis of the tube base 1, respectively; the number of the second fins 3 is multiple, and the multiple second fins 3 are circumferentially arranged along the outer wall surface of the tube base 1 and respectively extend spirally on the outer wall surface of the tube base 1 along the axis of the tube base 1; the number of the first fins 2 is equal to the number of the second fins 3. Therefore, the fin parts 5 of the adjacent first fins 2 form a spiral flow channel structure on the outer wall surface of the tube base body 1, and the second fins 3 which are penetrated at intervals and are thin and high are arranged in the flow channel structure, so that the combined fin with the structure has the effects of strengthening evaporation and condensation.

In some embodiments, the number of the first fins 2 and the second fins 3 is 30 to 100 FPI in the axial direction of the tube base 1, i.e., 30 to 100 fins per inch.

In some embodiments, the number of fins per inch is 56, which is the best effect of the heat exchange tube.

In some embodiments, a third cut portion 10 is provided between two adjacent fin tips 7, and the dimension of the third cut portion 10 in a direction perpendicular to the outer wall surface of the tube base 1 is a depth H6 of the third cut portion 10, satisfying H6-0.05 mm-0.5 mm; the dimension of the bottom of the third cut-out portion 10 in the circumferential direction of the tube base 1 is the bottom width L12 of the third cut-out portion 10, and L12 is 0.02mm to 0.2 mm; an angle θ 2 between both side walls of the third notch portion 10 satisfies θ 2 being 0 to 90 °. In the second cut portion 8, the fin tip 7 of each first fin 2 is cut into a discontinuous spine structure, and in order to allow the fin tip 7 of the adjacent first fin 2 to be discontinuous, a third cut portion 10 is provided, and the shape of the third cut portion 10 is preferably matched with the shape of the second cut portion 7.

In some embodiments, L12 is 0.1mm, θ 2 is 45 °, and the heat exchange tube is most effective.

In some embodiments, the center-to-center distance L10 between two adjacent second cut-out portions 8 satisfies L10-1.2 mm.

In some embodiments, the L10 is 0.9mm, which is the best effect of the heat exchange tube.

In some embodiments, the distance L8 between two adjacent second fins 3 satisfies L8-1.2 mm.

In some embodiments, the L8 is 0.9mm, which is the best effect of the heat exchange tube.

In some embodiments, the first cut portion 6 has at least one of a trapezoidal shape, an arc shape, and a V shape, so that the condensate after being punctured by the second fin 3 and the fin tip portion 7 can flow down rapidly.

In some embodiments, the fin portion 5 is provided with a flow guide groove 11 on the side facing away from the tube base 1, and the flow guide groove 11 is at least one of linear, V-shaped and X-shaped. Under the heating working condition, the fin tip part 7 can rapidly puncture a condensate film, and the generated condensate can be rapidly discharged to the outer wall surface of the pipe base body 1 through the diversion trench 11.

In some embodiments, the flow guide grooves 11 are uniformly distributed on the surface of the fin tip 7, and the FPI satisfies 50-300, so that the heat exchange tube has the best effect.

In some embodiments, the tube base 1 is internally avoided to be provided with the internal rib structure 12, the internal rib structure 12 is plural, and the plural internal rib structures 12 are arranged circumferentially along the inner wall surface of the tube base 1 and extend spirally on the inner wall surface of the tube base 1 along the axis of the tube base 1, respectively. The inner rib structure increases the heat transfer area of the inner wall surface of the heat exchange tube, enhances the disturbance effect of media in the tube, strengthens the heat exchange effect in the tube and further enhances the overall performance of the heat exchange tube.

A heat exchanger adopts the heat exchange tube.

An air conditioner adopts foretell heat exchange tube.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present disclosure is to be considered as limited only by the preferred embodiments and not limited to the specific embodiments described herein, and all changes, equivalents and modifications that come within the spirit and scope of the disclosure are desired to be protected. The foregoing is only a preferred embodiment of the present disclosure, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present disclosure, and these improvements and modifications should also be considered as the protection scope of the present disclosure.

Claims (22)

1. A heat exchange tube, comprising:

a tube base (1);

the outer wall surface of the tube base body (1) is provided with a first fin (2) and a second fin (3);

the first fin (2) comprises a fin root (4) perpendicular to the outer wall surface of the tube base (1), and a fin portion (5) parallel to the outer wall surface of the tube base (1), the fin portion (5) being provided at a tip of the fin root (4);

the second fin (3) is arranged on the tube base body (1) covered by the fin part (5), the tail end of the second fin (3) penetrates out of the fin part (5), and the fin part (5) is provided with a first cut part (6) for the second fin (3) to penetrate through.

2. A heat exchange tube according to claim 1, characterized in that the fin portion (5) is provided with a fin tip portion (7) on a side facing away from the tube base (1), the fin tip portion (7) being provided perpendicular to the outer wall surface of the tube base (1).

3. A heat exchange tube according to claim 2, wherein the dimension of the fin root (4) in the axial direction of the tube base (1) is a thickness L1 of the fin root (4), satisfying L1-0.05 mm-0.2 mm; the dimension of the second fin (3) in the axial direction of the tube base (1) is the thickness L2 of the second fin (3), and L2 is 0.05mm-0.2 mm; the dimension of the fin tip portion (7) in the axial direction of the tube base body (1) is the thickness L6 of the fin tip portion (7), and L6 is 0.05mm-0.2 mm.

4. A heat exchange tube according to claim 3, wherein the size of the fin tip portion (7) in a direction perpendicular to the outer wall surface of the tube base (1) is a thickness H4 of the fin tip portion (7), and satisfies H4-0.05 mm-0.2 mm.

5. A heat exchange tube according to claim 1, wherein the dimension of the first fin (2) in the axial direction of the tube base (1) is the thickness L3 of the first fin (2), and L3 is 0.1mm to 0.4 mm.

6. The heat exchange tube according to claim 2, wherein the distance from the end of the second fin (3) to the outer wall surface of the tube base (1) is the height H2 of the second fin (3), and the distance from the end of the fin tip (7) to the outer wall surface of the tube base (1) is the height H1 of the first fin (2), so that H1-H2-1.2 mm is satisfied.

7. A heat exchange tube according to claim 2, wherein the distance from the tip of the fin tip (7) to the side of the fin portion (5) facing away from the tube base (1) is a height H3 of the fin tip (7), and satisfies H3-0.1 mm-0.5 mm.

8. The heat exchange tube according to claim 2, wherein a projection of the fin tip (7) and the fin root (4) on the outer wall surface of the tube base (1) is a distance L4 in the axial direction of the tube base (1), which satisfies L4-0.055 mm-0.2 mm.

9. The heat exchange tube according to claim 1, wherein a projection of the second fin (3) and the fin root (4) on the outer wall surface of the tube base (1) is a distance L5 in the axial direction of the tube base (1), which satisfies L5-0.125 mm-0.25 mm.

10. A heat exchange tube according to claim 1, wherein the dimension of the first notch portion (6) in the axial direction of the tube base (1) is a depth L7 of the first notch portion (6), and L7 is 0.05mm to 0.35 mm.

11. A heat exchange tube according to claim 2, characterized in that the fin tip portion (7) is provided with a second cut-out portion (8).

12. The heat exchange tube according to claim 11, wherein the second cutout portion (8) has a dimension in a direction perpendicular to the outer wall surface of the tube base (1) of a depth H5 of the second cutout portion (8), satisfying H5-0.05 mm-0.5 mm; the dimension of the bottom of the second cut-out portion (8) in the circumferential direction of the tube base (1) is the bottom width L11 of the second cut-out portion (8), and L11 is 0.02mm-0.2 mm; an included angle theta 1 between the two side walls of the second notch part (8) satisfies that theta 1 is 0-90 degrees.

13. A heat exchange tube according to claim 2, characterized in that the outer wall surface of the tube base (1) covered by the fin portion (5) is further provided with a dimple structure (9).

14. The heat exchange tube according to claim 2, wherein the first fin (2) is plural, and the plural first fins (2) are arranged circumferentially along the outer wall surface of the tube base (1) and extend spirally on the outer wall surface of the tube base (1) along the axis of the tube base (1), respectively; the number of the second fins (3) is multiple, and the multiple second fins (3) are circumferentially arranged along the outer wall surface of the tube base body (1) and respectively extend spirally on the outer wall surface of the tube base body (1) along the axis of the tube base body (1);

the number of the first fins (2) is equal to the number of the second fins (3).

15. The heat exchange tube according to claim 14, wherein a third cut portion (10) is provided between adjacent two fin tips (7), and a dimension of the third cut portion (10) in a direction perpendicular to the outer wall surface of the tube base (1) is a depth H6 of the third cut portion (10), satisfying H6-0.05 mm-0.5 mm; the dimension of the bottom of the third cut-out portion (10) in the circumferential direction of the tube base (1) is the bottom width L12 of the third cut-out portion (10), and L12 is 0.02mm-0.2 mm; an angle θ 2 between both side walls of the third notch portion (10) satisfies the condition that θ 2 is 0 to 90 °.

16. A heat exchange tube according to claim 14, wherein the center-to-center distance L10 between two adjacent second cut-out portions (8) satisfies L10-1.2 mm.

17. A heat exchange tube according to claim 14, wherein the distance L8 between two adjacent second fins (3) satisfies L8-1.2 mm.

18. A heat exchange tube according to claim 1, characterized in that the first cut-out portion (6) is at least one of trapezoidal, arcuate, V-shaped.

19. A heat exchange tube according to claim 1, characterized in that the fin part (5) is provided with flow guide grooves (11) on the side facing away from the tube base body (1), and the flow guide grooves (11) are at least one of linear, V-shaped and X-shaped.

20. A heat exchange tube according to any one of claims 1 to 19, characterized in that the tube base (1) is avoided from being provided with an inner rib structure (12), the inner rib structure (12) is plural, and the plural inner rib structures (12) are arranged circumferentially along the inner wall surface of the tube base (1) and extend spirally on the inner wall surface of the tube base (1) along the axis of the tube base (1), respectively.

21. A heat exchanger, characterized in that a heat exchange tube according to any one of claims 1 to 20 is used.

22. An air conditioner characterized in that the heat exchange pipe of any one of claims 1 to 20 is used.

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