CN218066087U

CN218066087U - Fin, heat exchanger and air conditioner

Info

Publication number: CN218066087U
Application number: CN202222614948.9U
Authority: CN
Inventors: 苏明泽
Original assignee: GD Midea Air Conditioning Equipment Co Ltd
Current assignee: GD Midea Air Conditioning Equipment Co Ltd
Priority date: 2022-09-30
Filing date: 2022-09-30
Publication date: 2022-12-16
Anticipated expiration: 2032-09-30

Abstract

The application relates to the technical field of air conditioning, and provides a fin, a heat exchanger and an air conditioner, wherein the fin comprises a base body and a bridge piece, the base body is provided with a slot and a tube hole for installing a heat exchange tube, and the slot is arranged at the periphery of the tube hole; the bridge piece is connected with the base body, the bridge piece is arranged corresponding to the slit, and at least one part of the slit and/or at least one part of the bridge piece extend obliquely relative to the length direction of the base body. The application provides a fin, heat exchanger and air conditioner can improve heat exchange efficiency.

Description

Fin, heat exchanger and air conditioner

Technical Field

The application relates to the technical field of air conditioning, in particular to a fin, a heat exchanger and an air conditioner.

Background

In the related art, all the slits of the fins of the heat exchanger are perpendicular to the direction of the air flow, that is, the slits are along the length direction of the fins, which makes it difficult for the heat of the heat exchange tube to be transferred to the part of the fins far away from the heat exchange tube, resulting in that the temperature of the part of the fins far away from the heat exchange tube is closer to the temperature of the air flow, and the fin efficiency is low.

SUMMERY OF THE UTILITY MODEL

In view of this, embodiments of the present application are expected to provide a fin, a heat exchanger and an air conditioner, so as to improve the heat exchange efficiency of the fin.

In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:

an aspect of an embodiment of the present application discloses a fin, including:

the heat exchanger comprises a base body and a heat exchanger, wherein a slot and a pipe hole for installing a heat exchange pipe are formed in the base body, and the slot is arranged on the periphery of the pipe hole;

the bridge piece is connected with the base body and arranged corresponding to the seam, and at least one part of the seam and/or at least one part of the bridge piece extend obliquely relative to the length direction of the base body.

In one embodiment, a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the bridge piece on the first projection plane covers the slit.

In an embodiment, the number of the slits and the number of the bridge pieces are both multiple, multiple slits are distributed in the circumferential direction of the pipe hole at intervals, and one bridge piece is arranged in each slit.

In one embodiment, the number of the pipe holes is multiple, the pipe holes are arranged at intervals along the length direction of the base body, the plurality of bridge pieces distributed at intervals in the circumferential direction of each pipe hole are bridge piece groups, a connecting line of circle centers of two adjacent pipe holes is a base line, the bridge piece farthest from the base line in each bridge piece group is a first bridge piece, the bridge piece closest to the base line in each bridge piece group is a third bridge piece, the bridge piece between the first bridge piece and the third bridge piece in each bridge piece group is a second bridge piece, the first bridge pieces in the two adjacent bridge piece groups are mutually spaced, and the third bridge pieces in the two adjacent bridge piece groups are mutually connected.

In one embodiment, the fin comprises a first flat part extending along the length direction of the base body, one end of each first bridge piece, which is far away from the corresponding tube hole, is connected with the first flat part, and the first flat parts connected with the first bridge pieces of two adjacent bridge piece groups are spaced from each other; or

The first bridge piece comprises a first inclined part and a first flat part which are connected with each other, the first inclined part is close to and corresponds to the pipe hole and extends obliquely relative to the length direction of the base body, the first flat part is connected to one end, away from and corresponds to the pipe hole, of the first inclined part, and the first flat part is parallel to the length direction of the base body.

In one embodiment, the length of the first straight portion is L1, the sum of the lengths of the first straight portion and the two first bridge pieces where the first straight portion is located is L2, and the ratio of L1 to L2 is between 0.3 and 0.6.

In an embodiment, the second bridge pieces in two adjacent bridge piece groups are connected to each other, or the second bridge pieces in two adjacent bridge piece groups are spaced from each other.

In one embodiment, the fin includes a second straight portion extending along a length of the base;

the second bridge pieces of two adjacent bridge piece groups are connected through the second straight parts; or one end of each second bridge piece, which is far away from the corresponding tube hole, is connected with the second straight part, and the second straight parts connected with the second bridge pieces of two adjacent bridge piece groups are mutually spaced.

In one embodiment, the second bridge piece includes a second inclined portion and a second straight portion that are connected to each other, the second inclined portion is close to the corresponding pipe hole and extends obliquely with respect to the longitudinal direction of the base body, the second straight portion is connected to an end of the second inclined portion away from the corresponding pipe hole, the second straight portion is parallel to the longitudinal direction of the base body, and two corresponding second bridge pieces in two adjacent bridge piece groups are connected by the second straight portion.

In one embodiment, the length of the second straight portion is L3, the sum of the lengths of the second straight portion and the two second bridge pieces where the second straight portion is located is L4, and the ratio of L3 to L4 is between 0.1 and 0.3.

In one embodiment, the fin comprises a third straight part extending along the length direction of the base body, and the third bridge pieces of two adjacent bridge piece groups are connected through the third straight part; or

The third bridge piece comprises a third inclined part and a third straight part which are mutually connected, the third inclined part is close to the corresponding pipe hole and extends obliquely relative to the length direction of the base body, the third straight part is connected to one end, far away from the corresponding pipe hole, of the third inclined part, the third straight part is parallel to the length direction of the base body, and two corresponding third bridge pieces in two adjacent bridge piece groups are connected through the third straight part.

In one embodiment, the length of the third straight portion is L5, the sum of the lengths of the third straight portion and the two third bridge pieces on which the third straight portion is located is L5, and the ratio of L5 to L6 is less than or equal to 0.2.

In one embodiment, the fin is a symmetrical structure, the fin has a first symmetrical plane, the first symmetrical plane is perpendicular to the base line, and the midpoint of the base line is located on the first symmetrical plane.

In one embodiment, the fin is a symmetrical structure, the fin has a second symmetrical surface, the second symmetrical surface is parallel to the base line, and the base line is located on the second symmetrical surface.

In one embodiment, a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the first bridge piece on the first projection plane is a first projection; an edge line of the first projection close to the base line is a first inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the first inner edge line and is close to the starting point of the pipe hole is a first inner ray, and an included angle between the first inner edge line and the first inner ray is 15-25 degrees; the edge line of the first projection far away from the base line is a first outer edge line, a ray starting from the center of the corresponding pipe hole and passing through the starting point of the first outer edge line close to the pipe hole is a first outer ray, and an included angle between the first outer edge line and the first outer ray is 23-33 degrees.

In one embodiment, a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the second bridge piece on the first projection plane is a second projection; an edge line of the second projection close to the base line is a second inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the second inner edge line and is close to the starting point of the pipe hole is a second inner ray, and an included angle between the second inner edge line and the second inner ray is 9-19 degrees; the edge line of the second projection far away from the base line is a second outer edge line, a ray which starts from the center of the corresponding tube hole and passes through the second outer edge line and is close to the starting point of the tube hole is a second outer ray, and an included angle between the second outer edge line and the second outer ray is 17-27 degrees.

In one embodiment, a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the third bridge piece on the first projection plane is a third projection; an edge line of the third projection close to the base line is a third inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the third inner edge line and is close to the starting point of the pipe hole is a third inner ray, and an included angle between the third inner edge line and the third inner ray is between-5 and 5 degrees; an edge line of the third projection far away from the base line is a third outer edge line, a ray starting from the center of the corresponding tube hole and passing through the starting point of the third outer edge line close to the tube hole is a third outer ray, and an included angle between the third outer ray and the third outer edge line is 8-18 degrees.

In one embodiment, the bridge piece comprises a lofting part and a bridge body, the bridge body is located on one side of the base body in the thickness direction of the base body, the lofting part is connected with the base body and the bridge body, and the lofting part is arranged at one end, close to the corresponding pipe hole, of the bridge body.

In one embodiment, the first distance between each lofting portion and the corresponding pipe hole is equal; or

The distance between the lofting parts close to the two ends of the base body in the width direction and the corresponding pipe holes is larger than the distance between the lofting parts close to the middle of the base body in the width direction and the corresponding pipe holes.

In one embodiment, the number of the bridge pieces is multiple, the number of the tube holes is multiple, the tube holes are arranged at intervals along the length direction of the base body, the bridge pieces distributed at intervals along the circumferential direction of each tube hole are a bridge piece group, a connecting line of the circle centers of two adjacent tube holes is a base line, each bridge piece group comprises a first bridge piece which is farthest away from the base line and a second bridge piece which is located between the first bridge piece and the base line, the extending direction of the first bridge piece and the included angle of the base line are first acute angles, the extending direction of the second bridge piece and the included angle of the base line are second acute angles, and the second acute angles are smaller than the first acute angles.

In an embodiment, the bridge piece group further includes a third bridge piece located between the second bridge piece and the base line, an included angle between the extending direction of the third bridge piece and the base line is a third acute angle, and the third acute angle is smaller than the second acute angle.

In one embodiment, the number of the bridge pieces is multiple, the number of the tube holes is multiple, the tube holes are arranged at intervals along the length direction of the base body, a connecting line of circle centers of two adjacent tube holes is a base line, and an included angle between the extending direction of the bridge pieces and the base line is gradually increased along the bridge pieces in the direction far away from the base line.

Another aspect of the embodiments of the present application discloses a heat exchanger, including:

the fin of any one of the above embodiments;

the heat exchange tube penetrates through the tube hole.

The embodiment of the application discloses an air conditioner on the other hand, which comprises the heat exchanger.

The embodiment of the application discloses a fin, a heat exchanger and an air conditioner, wherein at least one part of a slot and/or at least one part of a bridge piece extend obliquely relative to the length direction of a base body, so that on one hand, the blocking effect of the slot and the bridge piece on airflow flowing into the fin is greatly weakened, the wind resistance can be reduced, and the airflow can smoothly pass through the fin; on the other hand, the heat from the heat exchange tube can be quickly transferred to the part of the substrate far away from the heat exchange tube, such as the air inlet position, so that the heat can be quickly transferred to the air inlet position, and the heat transfer temperature difference at the air inlet position can be increased, so that the fin efficiency and the heat exchange efficiency are improved; on the other hand, the slots and/or the bridge pieces extend along the first direction, so that the efficiency of the fins is improved, meanwhile, the disturbance to airflow can be enhanced, the development of a fluid (gas) boundary layer is interrupted, and the boundary layer is thinned, so that the convection heat transfer coefficient of the fins is improved; the fin that this embodiment provided both can improve the convection heat transfer coefficient promptly, can promote fin efficiency again, and comprehensive heat transfer performance is high.

Drawings

Fig. 1 is a partial structural schematic view of a fin according to an embodiment of the present application;

fig. 2 is a schematic partial structure view of a fin according to another embodiment of the present application.

Description of the reference numerals

A fin 100; a substrate 1; slotting 1a; the tube hole 1b; a first pipe hole 1b1; a second pipe hole 1b2; the first inner ray 1b3; the first outer ray 1b4; the second inner ray 1b5; the second external ray 1b6; the third internal ray 1b7; the third external ray 1b8; a first projection surface 1c; a transition portion 1d; a bridge piece 2; a first bridge piece 2a; a first projection 2a1; a first inclined portion 2a2; the first inner edge line 2a11; a first outer edge line 2a12; a second bridge piece 2b; a second projection 2b1; a second inclined portion 2b2; the second inner edge line 2b11; the second outside line 2b12; a third bridge piece 2c; a third projection 2c1; a third inclined portion 2c2; the third inner edge line 2c11; a third outer edge line 2c12; a lofting section 21; a bridge body 22; a first straight portion 3; a second straight portion 4; a third straight portion 5; a baseline S1.

Detailed Description

It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.

The present application will be described in further detail with reference to the following drawings and specific embodiments. The descriptions of "first," "second," etc. in the embodiments of the present application are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly including at least one feature. In the description of the embodiments of the present application, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.

The total heat exchange capacity of the fin can be expressed as phi = h eta A _fin Δ T, where Φ represents the total heat exchange of the fin; h represents the convective heat transfer coefficient; η represents fin efficiency; a. The _fin Is the surface area of the fin; Δ T is the heat transfer temperature difference.

Under the condition that the surface area and the heat transfer temperature difference of the fins are constant, the total heat exchange quantity of the fins is determined by the product of the convective heat exchange coefficient (h) and the fin efficiency (eta), and therefore h eta needs to be increased to improve the total heat exchange quantity of the fins.

One of the fins in the related art adopts a mode that all slots are perpendicular to the air flow, and the number of the slots needs to be increased in order to improve the convection heat transfer coefficient, but the efficiency of the fin is reduced, and the two types of the slots cannot be obtained at the same time, so that the comprehensive heat transfer performance is weaker. In order to improve the comprehensive heat exchange performance, the heat exchange coefficient needs to be increased and the disturbance of air flow needs to be enhanced.

In view of the above, in one aspect, the present embodiment provides a fin, and referring to fig. 1 and fig. 2, the fin 100 includes a base 1 and a bridge piece 2. The base body 1 is formed with a slit 1a and a pipe hole 1b for mounting a heat exchange pipe, the slit 1a being arranged at the outer periphery of the pipe hole 1 b. The bridge piece 2 is connected to the base body 1, the bridge piece 2 is arranged in correspondence with the slit 1a, and at least a part of the slit 1a and/or at least a part of the bridge piece 2 extend obliquely with respect to the length direction of the base body 1.

The oblique extension with respect to the longitudinal direction of the base body 1 means that at least a part of the slit 1a and/or at least a part of the bridge piece 2 extends away from the pipe hole 1b along a first direction, wherein the first direction intersects the longitudinal direction of the base body 1 and the first direction intersects the radial direction of the center of the pipe hole 1 b.

In the present embodiment, at least a part of the slot 1a and/or at least a part of the bridge piece 2 extend obliquely with respect to the length direction of the base body, so that on one hand, the blocking effect of the slot 1a and the bridge piece 2 on the airflow flowing into the fin 100 is greatly reduced, and the wind resistance can be reduced, so that the airflow can pass through the fin 100 more smoothly; on the other hand, the heat from the heat exchange tube can be quickly transferred to the part of the substrate 1 far away from the heat exchange tube, such as the air inlet position, so that the heat can be quickly transferred to the air inlet position, and thus, the heat transfer temperature difference at the air inlet position can be increased, so that the efficiency and the heat exchange efficiency of the fin 100 are improved; on the other hand, the slots 1a and/or the bridge pieces 2 extend along the first direction, so that the efficiency of the fin 100 is improved, meanwhile, the disturbance to airflow can be enhanced, the development of a fluid (gas) boundary layer is interrupted, and the boundary layer is thinned, so that the convection heat transfer coefficient of the fin 100 is improved; the fin 100 provided by the embodiment can improve the convection heat transfer coefficient, and can improve the efficiency of the fin 100, and the comprehensive heat exchange performance is high.

In an exemplary embodiment, the projection shape of the pipe hole 1b on the first projection surface 1c is adapted to the cross-sectional shape of the heat exchange pipe.

In an embodiment, referring to fig. 1 or fig. 2, a plane of the bridge piece 2 perpendicular to the thickness direction of the substrate 1 is a first projection plane 1c, and a projection of the bridge piece 2 on the first projection plane 1c covers the slit 1a. Thus, the projection of the bridge piece 2 on the first projection surface 1c also extends substantially along a ray at the center of the pipe hole 1 b.

In one embodiment, the width of the projection of at least a portion of the bridge piece 2 on the first projection surface 1c is gradually increased along the first direction. The design is difficult to cut off the heat flow line, the influence on the transmission of heat flow is small, and the heat exchange effect is good.

In one embodiment, referring to fig. 1 or fig. 2, the number of slits 1a and the number of bridge pieces 2 are plural. For example, the number of slits 1a and the number of bridge pieces 2 are not limited, and the number of slits 1a corresponds to the number of bridge pieces 2, for example, the number of slits 1a and the number of bridge pieces 2 may be 4, 5, 6, 7, or 8, respectively. A plurality of slits 1a are distributed at intervals in the circumferential direction of the pipe hole 1b, and each slit 1a is provided with one bridge piece 2. Therefore, the wind resistance can be weakened, the blocked condition of heat flow can be reduced, and the heat exchange effect is good.

In an embodiment, referring to fig. 1 or fig. 2, a portion of the base 1 located between two adjacent slits 1a is a transition portion 1d, and a width of the transition portion 1d gradually increases along a radial direction of a center of the pipe hole 1 b. Like this, can make the transmission of thermal current more unobstructed for the temperature on base member 1 and the bridge piece 2 is close to the wall temperature of heat exchange tube more, and the increase heat transfer difference in temperature, the heat transfer is effectual.

In an embodiment, referring to fig. 1 or fig. 2, the number of the pipe holes 1b is multiple, and the pipe holes 1b are arranged at intervals along the length direction of the base 1. Illustratively, the number of the pipe holes 1b may be two, and along the length direction of the base body 1, the first pipe hole 1b1 is located on the left side, and the second pipe hole 1b2 is located on the right side. The plurality of bridge pieces 2 distributed at intervals in the circumferential direction of each pipe hole 1b are bridge piece groups, a connecting line of circle centers of two adjacent pipe holes 1b is a base line S1, the bridge piece 2 farthest from the base line S1 in each bridge piece group is a first bridge piece 2a, the bridge piece 2 closest to the base line S1 in each bridge piece group is a third bridge piece 2c, the bridge piece 2 located between the first bridge piece 2a and the third bridge piece 2c in each bridge piece group is a second bridge piece 2b, the first bridge pieces 2a of the two adjacent bridge piece assemblies are mutually spaced, and the third bridge pieces 2c in the two adjacent bridge piece groups are mutually connected. In this way, the disturbance to the air flow can be enhanced to improve the heat exchange capability of the fin 100. In some embodiments, the base line S1 is parallel to the length direction of the substrate 1.

The fins 100 in the related art are simulated through CFD (Computational Fluid Dynamics), that is, all the fins 100 with the slits 1a perpendicular to the airflow direction, and when the number of the bridge plate pairs is 6, the relative value of the heat exchange amount under the equal pump power is 1, whereas the fin 100 in this embodiment obtains the relative value of the heat exchange amount under the equal pump power by CFD simulation to be 1.04, which is higher than the fin 100 designed in the related art with the slits 1a perpendicular to the airflow direction, and therefore, the comprehensive heat exchange capability is strong.

In the present application, a pair of the bridge pieces 2 located at the same position in the longitudinal direction of the base 1 is a pair of bridge pieces, for example, 1 first bridge piece 2a and 1 corresponding first bridge piece 2a located at the same position in the longitudinal direction of the base 1 are 1 pair of bridge pieces, and 1 second bridge piece 2b and 1 corresponding second bridge piece 2b located at the same position in the longitudinal direction of the base 1 are 1 pair of bridge pieces, and therefore, 6 pairs of bridge pieces are provided on the base 1 in each of fig. 1 and 2.

It should be noted that, because the air side pressure drop of the fin 100 is significantly affected by the number of the slits 1a, because the slits 1a can break the primary boundary layer, so that the boundary layer is developed again, and the development of the new boundary layer brings about a significant pressure drop, the heat exchange performance of this embodiment is significantly higher than that of the related art under the same number of pairs of slits 1a and the bridge pieces.

In one embodiment, referring to fig. 1 or fig. 2, the fin 100 includes a first flat portion 3 extending along the length direction of the base 1, and an end of the first bridge piece 2a away from the corresponding tube hole 1b is connected to the first flat portion 3. In this way, the first straight portion 3 is arranged in the length direction, that is, the first straight portion 3 is arranged in the direction perpendicular to the airflow direction, so that on one hand, the disturbance of the airflow can be enhanced, the development of a fluid (airflow) boundary layer is interrupted, the boundary layer is thinned, the heat exchange capability of the fin 100 is improved, and the heat exchange effect is good; on the other hand, in the case where the surface area of the base body 1 is limited, by providing the first flat portion 3, in this way, a greater number of slits 1a and the bridge pieces 2 can be arranged to further enhance the heat exchange effect. The first straight parts 3 connected with the first bridge pieces 2a of two adjacent bridge piece groups are spaced from each other. Therefore, the connection between the first bridge piece 2a and the corresponding first bridge piece 2a is broken at the edge of the base body 1, so that the strength of the base body 1 can be improved, and the working stability of the base body is enhanced.

In one embodiment, the first bridge piece 2a includes a first inclined portion 2a2 and a first flat portion 3 connected to each other, the first inclined portion 2a2 is adjacent to the pipe hole 1b and extends obliquely with respect to the longitudinal direction of the base body 1, the first flat portion 3 is connected to an end of the first inclined portion 2a2 remote from the corresponding pipe hole 1b, and the first flat portion 3 is parallel to the longitudinal direction of the base body 1. By thus manufacturing the first flat portion 3 and the first inclined portion 2a2 as a single body, the number of mounting steps can be reduced, and the mounting time can be reduced.

In one embodiment, the first flat portion 3 has a width dimension of 1mm to 3 mm. Illustratively, the dimension of the first flat portion 3 in the width direction may be 1mm, 2mm, 3mm, or the like, so that the dimension of the first flat portion 3 in the width direction is moderate, and a greater number of slits 1a and the bridge pieces 2 may be arranged to enhance the heat exchange effect.

In an embodiment, please refer to fig. 1 or fig. 2, the second bridge pieces 2b in two adjacent bridge piece sets are connected to each other. Thus, the disturbance to the air flow can be enhanced, and the heat exchange effect of the fin 100 can be improved.

In one embodiment, the second bridge pieces 2b in two adjacent bridge piece groups are spaced from each other. In this way, the connection between the second bridge piece 2b and the corresponding second bridge piece 2b is broken at the edge of the base body 1, which can further improve the strength and the service life of the base body 1.

In one embodiment, referring to fig. 1 or fig. 2, the fin 100 includes a second straight portion 4 extending along the length direction of the substrate 1. The second bridge pieces 2b of two adjacent bridge piece groups are connected by a second straight part 4. In this way, by providing the second straight portion 4 in the longitudinal direction, the disturbance of the air flow can be further enhanced, and the heat exchange effect of the fin 100 can be improved.

In one embodiment, one end of the second bridge piece 2b far away from the corresponding pipe hole 1b is connected with the second straight portion 4, and the second straight portions 4 connected with the second bridge pieces 2b of two adjacent bridge piece groups are spaced from each other. Like this, break second bridge piece 2b and the connection of the second bridge piece 2b that corresponds at the edge of base member 1, can further improve the intensity and the life of base member 1 to strengthen its job stabilization nature, work efficiency is high.

In one embodiment, the second bridge piece 2b includes a second inclined portion 2b2 and a second straight portion 4, the second inclined portion 2b2 is close to the corresponding pipe hole 1b and extends relative to the length direction of the base body 1, the second straight portion 4 is connected to one end of the second inclined portion 2b2 away from the corresponding pipe hole 1b, the second straight portion 4 is parallel to the length direction of the base body, and two second bridge pieces corresponding to two adjacent bridge piece groups are connected through the second straight portion 4. In this way, by manufacturing the second inclined portion 2b2 and the second flat portion 4 as a single body, the number of mounting steps can be reduced, the mounting time can be reduced, and the efficiency can be improved.

In one embodiment, the second straight portion 4 has a dimension in the width direction of 1mm to 3 mm. Illustratively, the dimension of the second straight portion 4 in the width direction may be 1mm, 2mm, 3mm, etc., so that the dimension of the second straight portion 4 in the width direction is moderate, and a larger number of slits 1a and the bridge pieces 2 may be arranged to enhance the heat exchange effect.

In one embodiment, referring to fig. 2, the fin 100 includes a third straight portion 5 extending along the length direction of the substrate 1, and the third bridge pieces 2c of two adjacent bridge piece groups are connected by the third straight portion 5. In this way, by providing the third straight portion 5 in the longitudinal direction, the disturbance of the air flow can be further enhanced, and the heat exchange effect of the fin 100 can be improved.

In one embodiment, the third bridge piece 2c includes a third inclined portion 2c2 and a third straight portion 5 connected to each other, the third inclined portion 2c2 extends obliquely relative to the length direction of the base body near the corresponding pipe hole 1b, the third straight portion 5 is connected to one end of the third inclined portion 2c2 away from the corresponding pipe hole 1b, the third straight portion is parallel to the length direction of the base body 1, and two corresponding third bridge pieces 2c in two adjacent bridge piece groups are connected by the third straight portion 5. In this way, by manufacturing the third inclined portion 2c2 and the third straight portion 5 as a single body, the number of mounting steps can be reduced, the mounting time can be reduced, and the efficiency can be improved.

In one embodiment, the third straight portion 5 has a dimension in the width direction of 1mm to 3 mm. Illustratively, the dimension of the third straight portion 5 in the width direction may be 1mm, 2mm, 3mm, etc., so that the dimension of the third straight portion 5 in the width direction is moderate, and a greater number of slits 1a and bridges 2 may be arranged to enhance the heat exchange effect.

For example, in an embodiment, referring to fig. 1, the third bridge pieces 2c in two adjacent bridge piece groups may be directly connected without being connected by the third straight portion 5. In this way, the design difficulty and the manufacturing difficulty of the fin 100 can be reduced.

In one embodiment, the length of the first straight portion 3 is L1, and the sum of the lengths of the first straight portion 3 and the two first bridge pieces 2a where the first straight portion 3 is located is L2, wherein the ratio of L1 to L2 is between 0.3 and 0.6. Illustratively, the ratio of L1 to L2 may be 0.3, 0.4, 0.5, or 0.6. Therefore, by setting a moderate length ratio, on one hand, the strength of the matrix 1 can be increased, the service life of the matrix can be prolonged, and the working stability is good; on the other hand, when the disturbance to the air current is enhanced, the efficiency of the fins 100 at the edge of the base body 1 can be improved, so that the temperature at the position of the air inlet is closer to the wall temperature of the heat exchange tube, and the comprehensive heat exchange performance is good.

In one embodiment, the length of the second straight portion 4 is L3, and the sum of the lengths of the second straight portion 4 and the two second bridge pieces 2b where the second straight portion 4 is located is L4, wherein the ratio of L3 to L4 is between 0.1 and 0.3. Illustratively, the ratio of L3 to L4 may be 0.1, 0.2, or 0.3. Thus, by setting a moderate length ratio, the efficiency of the fin 100 is improved, and meanwhile, the disturbance capability to the airflow can be enhanced, so that the convective heat transfer coefficient is improved, and the comprehensive heat transfer performance is good.

In an embodiment, the length of the third straight portion 5 is L5, and the sum of the lengths of the third straight portion 5 and the two third bridge pieces 2c located therein is L5, wherein the ratio of L5 to L6 is less than or equal to 0.2. Illustratively, the ratio of L5 to L6 may be 0.05, 0.1, 0.15, 0.2, or the like. Thus, by setting a moderate length ratio, the efficiency of the fin 100 is improved, and meanwhile, the disturbance capability to the airflow can be enhanced, so that the convective heat transfer coefficient is improved, and the comprehensive heat transfer performance is good.

In one embodiment, the fin 100 has a symmetrical structure, the fin 100 has a first symmetrical plane, the first symmetrical plane is perpendicular to the base line S1, and the base line S1 has a major point on the first symmetrical plane. Thus, the difficulty of designing the bridge piece 2 and the slits 1a can be reduced and the design time can be reduced to improve the manufacturing efficiency of the fin 100.

In one embodiment, the fin 100 has a symmetrical structure, and the fin 100 has a second symmetrical surface, the second symmetrical surface is parallel to the baseline S1, and the baseline S1 is located on the second symmetrical surface. Thus, the difficulty of designing the bridge piece 2 and the slits 1a can be further reduced and the design time can be reduced to improve the manufacturing efficiency of the fin 100.

In an embodiment, referring to fig. 1 or fig. 2, a plane of the bridge piece 2 perpendicular to the thickness direction of the substrate 1 is a first projection plane 1c, and a projection of the first bridge piece 2a on the first projection plane 1c is a first projection 2a1; an edge line of the first projection 2a1, which is close to the base line S1, is a first inner edge line 2a11, a ray, which starts from the center of the corresponding pipe hole 1b and passes through the first inner edge line 2a11 and is close to the starting point of the pipe hole 1b, is a first inner ray 1b3, and an included angle between the first inner edge line 2a11 and the first inner ray 1b3 is 15-25 degrees. Illustratively, the angle between the first inner ray 1b3 and the first inner edge line 2a11 may be 15 °, 18 °, 20 °, 22 °, 25 °, or the like.

An edge line of the first projection 2a1 far from the base line S1 is a first outer edge line 2a12, a ray starting from the center of the corresponding pipe hole 1b and passing through the starting point of the first outer edge line 2a12 close to the pipe hole 1b is a first outer ray 1b4, and an included angle between the first outer edge line 2a12 and the first outer ray 1b4 is 23-33 degrees. Exemplarily, the angle between the first outer edge line 2a12 and the first outer ray 1b4 may be 23 °, 25 °, 27 °, 29 °, 31 ° or 33 °. Here, by designing the angle between the first inner ray 1b3 and the first inner edge line 2a11 and the angle between the first outer ray 1b4 and the first outer edge, the extending direction of the first bridge piece 2a and its slit 1a, i.e. the first direction, can be determined. It should be noted that, in the first aspect, the direction is not a radial direction parallel to the center of the tube hole 1b, nor a direction perpendicular to the flow direction of the air flow, but a direction between the two directions, so that the increase of the convection coefficient and the improvement of the efficiency of the fin 100 can be considered at the same time, and the comprehensive heat exchange performance of the fin 100 can be improved.

In an embodiment, referring to fig. 1 or fig. 2, a plane of the bridge piece 2 perpendicular to the thickness direction of the substrate 1 is a first projection plane 1c, and a projection of the second bridge piece 2b on the first projection plane 1c is a second projection 2b1. The edge line of the second projection 2b1 close to the base line S1 is a second inner edge line 2b11, a ray starting from the center of the corresponding tube hole 1b and passing through the starting point of the second inner edge line 2b11 close to the tube hole 1b is a second inner ray 1b5, and an included angle between the second inner ray 1b5 and the second inner edge line 2b11 is 9-19 degrees. Illustratively, the angle between the second inner edge line 2b11 and the second inner ray 1b5 may be 9 °, 11 °, 13 °, 15 °, 17 °, 19 °, or the like.

An edge line of the second projection 2b1 far from the base line S1 is a second outer edge line 2b12, a ray starting from the center of the corresponding pipe hole 1b and passing through the starting point of the second outer edge line 2b12 close to the pipe hole 1b is a second outer ray 1b6, and an included angle between the second outer edge line 2b12 and the second outer ray 1b6 is 17-27 degrees. Illustratively, the angle between the second outer edge line 2b12 and the second outer ray 1b6 may be 17 °, 19 °, 21 °, 23 °, 25 °, 27 °, or the like. Here, by designing the included angles between the second inner radial line 1b5 and the second inner edge line 2b11 and between the second outer radial line 1b6 and the second outer edge, the overall extending direction, i.e., the first direction, of the second bridge piece 2b and the slot 1a thereof can be determined, so that the increase of the convection coefficient and the improvement of the efficiency of the fin 100 can be considered at the same time, and the comprehensive heat exchange performance of the fin 100 can be further improved.

In an embodiment, referring to fig. 1 or fig. 2, a plane of the bridge piece 2 perpendicular to the thickness direction of the substrate 1 is a first projection plane 1c, and a projection of the third bridge piece 2c on the first projection plane 1c is a third projection 2c1. An edge line of the third projection 2c1 close to the baseline S1 is a third inner edge line 2c11, a ray starting from the center of the corresponding tube hole 1b and passing through the starting point of the third inner edge line 2c11 close to the tube hole 1b is a third inner ray 1b7, and an included angle between the third inner edge line 2c11 and the third inner ray 1b7 is between-5 and 5 degrees. Illustratively, the angle between the third inner edge line 2c11 and the third inner ray 1b7 may be-5 °, -3 °, -1 °, 3 °, or 5 °, etc.

An edge line of the third projection 2c1 far from the base line S1 is a third outer edge line 2c12, a ray starting from the center of the corresponding pipe hole 1b and passing through the third outer edge line 2c12 to be close to the starting point of the pipe hole 1b is a third outer ray 1b8, and an included angle between the third outer ray 1b8 and the third outer edge line 2c12 is 8-18 degrees. Exemplarily, the angle between the third outer ray 1b8 and the third outer edge 2c12 may be 8 °, 10 °, 12 °, 14 °, 16 °, 18 °, or the like. Here, by designing the included angles between the third inner radial line 1b7 and the third inner lateral line 2c11 and between the third outer radial line 1b8 and the third outer lateral line, the overall extending direction, i.e., the first direction, of the third bridge piece 2c and the slit 1a thereof can be determined, so that the increase of the convection coefficient and the improvement of the efficiency of the fin 100 can be considered at the same time, and the comprehensive heat exchange performance of the fin 100 can be further improved.

In one embodiment, referring to fig. 1 or fig. 2, the bridge piece 2 includes a lofting portion 21 and a bridge 22, the bridge 22 is located on one side of the base 1 along the thickness direction thereof, the lofting portion 21 connects the base 1 and the bridge 22, and one end of the bridge 22 near the corresponding pipe hole 1b is provided with the lofting portion 21. Exemplarily, the number of the lofting portions 21 is not limited, and taking the first bridge piece 2a as an example, the number of the lofting portions 21 may be two, one end of each of the two lofting portions 21 is connected to the base 1, and the other end of each of the two lofting portions 21 is connected to two ends of the bridge 22, so that the bridge 22 protrudes out of the base 1 to form a vent hole, so that the whole structure is approximately in a "bridge-shaped" structure, and air flow passes through the vent hole, thereby reducing wind resistance.

For example, in one embodiment, the air flow can pass through the vent hole and can also pass through the slot 1a to the other side of the base body 1 along the thickness, so that the wind resistance is further reduced.

In one embodiment, the first distance between each loft 21 and the corresponding tubular hole 1b is equal. Exemplarily, taking the first pipe hole 1b1 as an example, distances from the center of the first pipe hole 1b1 to the lofting portion 21 of each bridge piece 2 close to the first pipe hole 1b1 are all equal, so that heat flow transmission of the heat exchange pipe is more uniform, and the heat exchange effect is good.

In one embodiment, the first distance is between 2mm and 8 mm. Illustratively, the first distance may be 2mm, 6mm or 8mm, and the like, so that the first distance between the lofting portion 21 and the corresponding pipe hole 1b is moderate, which may make the heat flow transmission of the heat exchange pipe uniform and the structural design compact.

In one embodiment, the distance between the lofting portions 21 near the two ends in the width direction of the base 1 and the corresponding tube holes 1b is greater than the distance between the lofting portions 21 in the middle of the base 1 in the width direction and the corresponding tube holes 1 b. For example, the distance between the lofting portion 21 of the first bridge piece 2a close to the first pipe hole 1b1 and the center of the first pipe hole 1b1 may be greater than the distance between the lofting portion 21 of the second bridge piece 2b close to the first pipe hole 1b1 and the center of the first pipe hole 1b 1.

In one embodiment, the number of the bridge pieces 2 is multiple, the number of the tube holes 1b is multiple, and the multiple tube holes 1b are arranged at intervals along the length direction of the base body 1. For example, the number of the pipe holes 1b may be two, and along the length direction of the base body 1, the first pipe hole 1b1 is located on the left side, and the second pipe hole 1b2 is located on the right side. The plurality of bridge pieces 2 distributed at intervals in the circumferential direction of each pipe hole 1b are bridge piece groups, the circle centers of two adjacent pipe holes 1b are connected to form a base line S1, each bridge piece group comprises a first bridge piece 2a farthest from the base line S1 and a second bridge piece 2b located between the first bridge piece 2a and the base line S1, the extending direction of the first bridge piece 2a and the included angle of the base line S1 are first acute angles, the extending direction of the second bridge piece 2b and the included angle of the base line S1 are second acute angles, and the second acute angles are smaller than the first acute angles. In this way, by differentiating the different bridge pieces 2 through the first acute angle and the second acute angle, the disturbance to the air flow can be enhanced in different directions to improve the heat exchange capability of the fin 100.

In an embodiment, the bridge piece set further includes a third bridge piece 2c located between the second bridge piece 2b and the base line S1, an included angle between the extending direction of the third bridge piece 2c and the base line S1 is a third acute angle, and the third acute angle is smaller than the second acute angle. Therefore, the disturbance to the air flow can be further enhanced, and the heat exchange effect is good.

In one embodiment, the number of the bridge pieces 2 is multiple, the number of the tube holes 1b is multiple, and the multiple tube holes 1b are arranged at intervals along the length direction of the base body 1. Illustratively, the number of the pipe holes 1b may be two, and along the length direction of the base body 1, the first pipe hole 1b1 is located on the left side, and the second pipe hole 1b2 is located on the right side. The connecting line of the centers of circles of the two adjacent pipe holes 1b is a base line S1, and the included angle between the extending direction of the bridge piece 2 and the base line S1 is gradually increased along the plurality of bridge pieces 2 far away from the base line S1. Therefore, the situation that heat flow is blocked is reduced, heat flow can be more smoothly transmitted, and the heat exchange effect is good.

In one embodiment, the distance between the bridge piece 2 and the substrate 1 along the thickness direction of the substrate 1 varies periodically along the first direction. Illustratively, the bridge piece 2 may be arranged in a "corrugated" structure, for example, the distance between the bridge piece 2 and the base 1 may be periodically changed in such a way that the distance is first increased to form peaks and then decreased to form valleys along the extending direction of the bridge piece 2. In some embodiments, the heights of the peaks and valleys in each set of periods may be the same or different. In this way, turbulence to the airflow may be enhanced, thereby providing the heat exchange capability of the fin 100.

In one embodiment, the bridge piece 2 is obliquely arranged in the slit 1a. Illustratively, the bridges 2 may be disposed in the slots 1a at an angle to form a "louver" structure, so as to enhance the disturbance of the air flow and improve the heat exchange capability of the fin 100.

Illustratively, in one embodiment, the plurality of vanes 2 may be formed in different designs, for example, the plurality of vanes 2 may include both "corrugated" vanes 2 and "louvered" vanes 2, and may also include "bridge" vanes 2.

Another aspect of the present embodiment provides a heat exchanger, which includes a heat exchange tube and the fin 100 in any one of the above embodiments. The heat exchange tube is arranged in the tube hole 1b in a penetrating way.

In the heat exchanger provided by the embodiment, at least one part of the slot 1a and/or at least one part of the bridge piece 2 extend obliquely relative to the length direction of the base body, so that on one hand, the blocking effect of the slot 1a and the bridge piece 2 on the airflow flowing into the fin 100 is greatly weakened, and the wind resistance can be reduced, so that the airflow can smoothly pass through the fin 100; on the other hand, the heat from the heat exchange tube can be quickly transferred to the part of the substrate 1 far away from the heat exchange tube, such as the air inlet position, so that the heat can be quickly transferred to the air inlet position, and thus, the heat transfer temperature difference at the air inlet position can be increased, so that the efficiency and the heat exchange efficiency of the fin 100 are improved; on the other hand, the slots 1a and/or the bridge pieces 2 extend along the first direction, so that the efficiency of the fin 100 is improved, meanwhile, the disturbance to airflow can be enhanced, the development of a fluid (gas) boundary layer is interrupted, and the boundary layer is thinned, so that the convection heat transfer coefficient of the fin 100 is improved; the fin 100 provided by the embodiment can improve the convection heat transfer coefficient, and can improve the efficiency of the fin 100, and the comprehensive heat exchange performance is high.

Illustratively, in one embodiment, the heat exchanger may be used as an evaporator and/or a condenser.

In one embodiment, the number of the fins 100 is multiple, and the multiple fins 100 are arranged at intervals along the extending direction of the heat exchange tube. Illustratively, the distance between two adjacent fins 100 is not limited, for example, the distance between two adjacent fins 100100 may be 0.9mm, 1.2mm, 1.4mm, or 1.8mm, etc., so that by setting a moderate distance, the heat exchange area of the airflow may be further increased, and the heat exchange effect is more prominent.

In another aspect, an embodiment of the present application provides an air conditioner, including the heat exchanger in any one of the above embodiments.

For example, in one embodiment, the air conditioner may be used as an indoor unit and/or an outdoor unit, and the indoor unit may be a cabinet unit, an on-hook unit or a ceiling unit.

The above description is only a preferred embodiment of the present application, and is not intended to limit the present application, and it is obvious to those skilled in the art that various modifications and variations can be made in the present application. All changes, equivalents, modifications and the like which come within the spirit and principle of the application are intended to be embraced therein.

Claims

1. A fin, comprising:

2. The fin according to claim 1, wherein a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the bridge piece on the first projection plane covers the slit.

3. The fin according to claim 1, wherein the number of slots and the number of the fins are both plural, and a plurality of slots are circumferentially spaced around the tube hole, one of the fins being provided for each slot.

4. The fin according to claim 3, wherein the number of the tube holes is plural, the plural tube holes are arranged at intervals along the length direction of the base, the plural bridge pieces distributed at intervals in the circumferential direction of each tube hole are a bridge piece group, a connecting line of circle centers of two adjacent tube holes is a base line, a bridge piece farthest from the base line in the bridge piece group is a first bridge piece, a bridge piece closest to the base line in the bridge piece group is a third bridge piece, a bridge piece between the first bridge piece and the third bridge piece in the bridge piece group is a second bridge piece, the first bridge pieces in two adjacent bridge piece groups are spaced from each other, and the third bridge pieces in two adjacent bridge piece groups are connected with each other.

5. The fin according to claim 4, wherein the fin comprises a first straight portion extending along the length direction of the base body, one end of the first bridge piece away from the corresponding tube hole is connected with the first straight portion, and the first straight portions connected with the first bridge pieces of two adjacent bridge piece groups are spaced from each other; or

6. The fin according to claim 5, wherein the length of the first straight portion is L1, the sum of the lengths of the first straight portion and the two first bridge pieces on which the first straight portion is located is L2, and the ratio of L1 to L2 is between 0.3 and 0.6.

7. The fin according to claim 4, wherein the second fins in two adjacent fin groups are connected to each other or spaced apart from each other.

8. The fin according to claim 7, wherein the fin includes a second straight portion extending along a length of the base;

the second bridge piece of two adjacent bridge piece groups is connected through the second straight part; or one end of each second bridge piece, which is far away from the corresponding pipe hole, is connected with the corresponding second straight part, and the second straight parts connected with the second bridge pieces of two adjacent bridge piece groups are mutually spaced.

9. The fin according to claim 7, wherein the second bridge piece includes a second inclined portion and a second straight portion connected to each other, the second inclined portion being adjacent to the corresponding tube hole and extending obliquely with respect to the longitudinal direction of the base body, the second straight portion being connected to an end of the second inclined portion remote from the corresponding tube hole, the second straight portion being parallel to the longitudinal direction of the base body, and corresponding two second bridge pieces in adjacent two of the bridge piece groups being connected by the second straight portion.

10. The fin according to claim 8, wherein the length of the second straight portion is L3, the sum of the lengths of the second straight portion and the two second bridges on which the second straight portion is located is L4, and the ratio of L3 to L4 is between 0.1 and 0.3.

11. The fin according to claim 4, wherein the fin comprises a third straight portion extending in a length direction of the base, and third bridge pieces of two adjacent bridge piece groups are connected by the third straight portion; or

12. The fin according to claim 11, wherein the length of the third straight portion is L5, the sum of the lengths of the third straight portion and the two third bridge pieces on which the third straight portion is located is L5, and the ratio of L5 to L6 is less than or equal to 0.2.

13. The fin according to claim 4, wherein the fin is a symmetrical structure having a first plane of symmetry, the first plane of symmetry being perpendicular to the base line, and a midpoint of the base line being located on the first plane of symmetry.

14. The fin of claim 4, wherein the fin is a symmetrical structure, the fin having a second plane of symmetry, the second plane of symmetry being parallel to the base line, and the base line being located on the second plane of symmetry.

15. The fin according to claim 4, wherein a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the first bridge piece on the first projection plane is a first projection; an edge line of the first projection close to the base line is a first inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the first inner edge line and is close to the starting point of the pipe hole is a first inner ray, and an included angle between the first inner edge line and the first inner ray is 15-25 degrees; the edge line of the first projection far away from the base line is a first outer edge line, a ray starting from the center of the corresponding pipe hole and passing through the starting point of the first outer edge line close to the pipe hole is a first outer ray, and an included angle between the first outer edge line and the first outer ray is 23-33 degrees.

16. The fin according to claim 4, wherein a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the second bridge piece on the first projection plane is a second projection; an edge line of the second projection close to the base line is a second inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the second inner edge line and is close to the starting point of the pipe hole is a second inner ray, and an included angle between the second inner edge line and the second inner ray is 9-19 degrees; the edge line of the second projection far away from the base line is a second outer edge line, a ray starting from the center of the corresponding pipe hole and passing through the starting point of the second outer edge line close to the pipe hole is a second outer ray, and an included angle between the second outer edge line and the second outer ray is 17-27 degrees.

17. The fin according to claim 4, wherein a plane of the bridge piece perpendicular to the thickness direction of the base body is a first projection plane, and a projection of the third bridge piece on the first projection plane is a third projection; an edge line of the third projection close to the base line is a third inner edge line, a ray which starts from the center of the corresponding pipe hole and passes through the starting point of the third inner edge line close to the pipe hole is a third inner ray, and an included angle between the third inner edge line and the third inner ray is between-5 degrees and 5 degrees; an edge line of the third projection far away from the base line is a third outer edge line, a ray starting from the center of the corresponding tube hole and passing through the starting point of the third outer edge line close to the tube hole is a third outer ray, and an included angle between the third outer ray and the third outer edge line is 8-18 degrees.

18. The fin according to claim 1, wherein the bridge piece includes a lofting portion and a bridge body, the bridge body is located on one side of the base body in a thickness direction thereof, the lofting portion connects the base body and the bridge body, and the bridge body is provided with the lofting portion near an end of the corresponding tube hole.

19. The fin of claim 18, wherein a first distance between each loft and the corresponding tube aperture is equal; or

20. The fin according to any one of claims 1 to 19, wherein the number of the bridge pieces is plural, the number of the tube holes is plural, the plurality of tube holes are arranged at intervals along the length direction of the base, the plurality of bridge pieces distributed at intervals in the circumferential direction of each tube hole are a bridge piece group, a connecting line of the centers of circles of two adjacent tube holes is a base line, the bridge piece group includes a first bridge piece farthest from the base line and a second bridge piece located between the first bridge piece and the base line, an included angle between the extending direction of the first bridge piece and the base line is a first acute angle, an included angle between the extending direction of the second bridge piece and the base line is a second acute angle, and the second acute angle is smaller than the first acute angle.

21. The fin according to claim 20, wherein the bridge piece set further comprises a third bridge piece located between the second bridge piece and the base line, and the extending direction of the third bridge piece forms a third acute angle with the base line, and the third acute angle is smaller than the second acute angle.

22. The fin according to any one of claims 1 to 19, wherein the number of the bridge pieces is plural, the number of the tube holes is plural, the plural tube holes are arranged at intervals along the length direction of the base body, a connecting line of circle centers of two adjacent tube holes is a base line, and an included angle between the extending direction of the bridge piece and the base line is gradually increased along the plural bridge pieces far away from the base line.

23. A heat exchanger, comprising:

a fin according to any one of claims 1 to 22;

the heat exchange tube penetrates through the tube hole.

24. An air conditioner comprising the heat exchanger of claim 23.