EP4607136A1

EP4607136A1 - Heat exchanger and air conditioning system

Info

Publication number: EP4607136A1
Application number: EP25157382.0A
Authority: EP
Inventors: Yanxing Li; Jing Zhou; Jing Yang
Original assignee: Danfoss AS
Current assignee: Danfoss AS
Priority date: 2024-02-20
Filing date: 2025-02-12
Publication date: 2025-08-27
Also published as: MX2025000655A; CN120521428A; US20250264279A1

Abstract

The present disclosure discloses a heat exchanger and an air conditioning system comprising the heat exchanger. The heat exchanger comprises heat exchange tubes and fins, with the fin comprising a fin body and heat exchange tube grooves formed in the fin body, into which at least one heat exchange tube is inserted. The heat exchange tube groove comprises an open first groove end, a second groove end and two groove walls. At least one of the groove walls comprises a plurality of heat exchange tube guiding segments, which comprise first and second heat exchange tube guiding segments arranged in sequence from the first groove end to the second groove end. A line connecting between two endpoints of the first heat exchange tube guiding segment is inclined at a first angle relative to a reference plane defined by the first and second directions, and a line connecting between two endpoints of the second heat exchange tube guiding segment is inclined at a second angle relative to the reference plane when viewed in a direction perpendicular to the fin body, and the second angle is greater than the first angle and less than 90 degrees. Therefore, a performance of the heat exchanger and air conditioning system may be improved.

Description

Technical Field

The embodiments of the present disclosure relate to a heat exchanger and an air conditioning system comprising the heat exchanger.

Background

A heat exchanger comprises heat exchange tubes and fins, with the fins having heat exchange tube grooves that open on one side of the heat exchanger. The heat exchange tubes are inserted into the heat exchange tube grooves of the fins.

Summary of the Invention

The purpose of the embodiments of the present disclosure is to provide a heat exchanger and an air conditioning system comprising the heat exchanger, thereby improving a performance of the heat exchanger and the air conditioning system, for example.
An embodiment of the present disclosure provides a heat exchanger comprising: a plurality of heat exchange tubes arranged in a first direction; and a plurality of fins arranged in a second direction perpendicular to the first direction, each of which comprises a fin body and a plurality of heat exchange tube grooves formed in the fin body, with at least one of the plurality of heat exchange tubes being inserted into each of at least some of the plurality of heat exchange tube grooves, wherein the heat exchange tube groove comprises: an open first groove end and a second groove end opposite to the first groove end; and two opposite groove walls, and at least one of the two groove walls of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins comprises a plurality of heat exchange tube guiding segments comprising: a first heat exchange tube guiding segment and a second heat exchange tube guiding segment arranged in sequence from the first groove end to the second groove end, wherein, a line connecting between two endpoints of the first heat exchange tube guiding segment is inclined at a first angle relative to a reference plane defined by the first and second directions, and a line connecting between two endpoints of the second heat exchange tube guiding segment is inclined at a second angle relative to the reference plane when viewed in a direction perpendicular to the fin body, and the second angle is greater than the first angle and less than 90 degrees.
According to the embodiments of the present disclosure, the plurality of heat exchange tube guiding segments further comprise a third heat exchange tube guiding segment between the second heat exchange tube guiding segment and the second groove end, a line connecting between two endpoints of the third heat exchange tube guiding segment is inclined at a third angle relative to the reference plane when viewed in the direction perpendicular to the fin body, and the third angle is greater than the second angle and less than 90 degrees.
According to the embodiments of the present disclosure, the plurality of heat exchange tubes comprise a plurality of rows of heat exchange tubes arranged in the first direction, each row of heat exchange tubes consisting of one heat exchange tube or a plurality of heat exchange tubes; the one heat exchange tube or the plurality of heat exchange tubes of each of the plurality of rows of heat exchange tubes are inserted into one of the plurality of heat exchange tube grooves; and the length of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins in a third direction perpendicular to the first and second directions is greater than a heat exchange tube size of a row of heat exchange tubes inserted therein in the third direction, in the case where the row of heat exchange tubes is consisted of one heat exchange tube, the heat exchange tube size is the size of that one heat exchange tube in the third direction, while in the case where the row of heat exchange tubes is consisted of a plurality of heat exchange tubes, the heat exchange tube size is a sum of the sizes of the plurality of heat exchange tubes in the third direction.
According to the embodiments of the present disclosure, the heat exchange tubes in the rows of the heat exchange tubes disposed in the plurality of heat exchange tube grooves of the plurality of fins comprise a plurality of columns of heat exchange tubes arranged in the third direction, and each of the plurality of columns of heat exchange tubes comprises a plurality of heat exchange tubes arranged in the first direction.
According to the embodiments of the present disclosure, a heat exchange tube in a plurality of columns of heat exchange tubes comprises a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction; and the heat exchanger further comprises a connecting portion, through which the first ends of the heat exchange tubes in one of the plurality of columns of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in another one of the plurality of columns of heat exchange tubes respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in one column of heat exchange tubes, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in another column of heat exchange tubes respectively.
According to the embodiments of the present disclosure, the connecting portion comprises a plurality of connecting tubes, through which the first ends of the heat exchange tubes in the one column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the another column of heat exchange tubes respectively.
According to the embodiments of the present disclosure, the heat exchange tubes in the one column of heat exchange tubes, the connecting tubes, and the heat exchange tubes in the another column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.
According to the embodiments of the present disclosure, the heat exchange tube in a plurality of columns of heat exchange tubes comprise a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction; the plurality of columns of heat exchange tubes comprise a first column of heat exchange tubes, a second column of heat exchange tubes, a third column of heat exchange tubes, and a fourth column of heat exchange tubes arranged in sequence in the first direction; the heat exchanger further comprises a first connecting portion and a second connecting portion, wherein the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes through the first connecting portion respectively, and the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes through the second connecting portion respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the first column of heat exchange tubes and the second column of heat exchange tubes respectively, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the third column of heat exchange tubes and the fourth column of heat exchange tubes respectively.
According to the embodiments of the present disclosure, the first connecting portion comprises a plurality of first connecting tubes, through which the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes respectively; and the second connecting portion comprises a plurality of second connecting tubes, through which the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes respectively.
According to the embodiments of the present disclosure, the heat exchange tubes in the first column of heat exchange tubes, the first connecting tubes, and the heat exchange tubes in the third column of heat exchange tubes that are interconnected with one another are formed by a single bent tube; and the heat exchange tubes in the second column of heat exchange tubes, the second connecting tubes, and the heat exchange tubes in the fourth column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.
According to the embodiments of the present disclosure, the plurality of heat exchange tube grooves comprise a plurality of columns of the heat exchange tube grooves arranged in a third direction perpendicular to the first and second directions, each of the plurality of columns of the heat exchange tube grooves comprising a plurality of heat exchange tube grooves arranged in the first direction.
According to the embodiments of the present disclosure, at least two of a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins have different lengths in the third direction.
According to the embodiments of the present disclosure, a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins and a plurality of heat exchange tube grooves in at least another one of a plurality of columns of heat exchange tube grooves of the plurality of fins are alternately arranged in the first direction.
According to the embodiments of the present disclosure, the width of the portion of the heat exchange tube groove where the plurality of heat exchange tube guiding segments are provided is configured to gradually decrease in a direction from the first groove end to the second groove end when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, the plurality of heat exchange tube guiding segments are straight line segments, circular arc segments, or a combination of the straight line segments and circular arc segments when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, a total size of the plurality of heat exchange tube guiding segments in the direction from the first groove end to the second groove end is 1/4 of the size of the heat exchange tube groove.
According to the embodiments of the present disclosure, at least one portion of at least one groove wall of the heat exchange tube groove located between the plurality of heat exchange tube guiding segments and the second groove end is substantially perpendicular to the reference plane.
According to the embodiments of the present disclosure, a gap between at least one portion of at least one groove wall of the heat exchange tube groove located between the plurality of heat exchange tube guiding segments and the second groove end and the heat exchange tube is less than or equal to 0.15 mm.
According to the embodiments of the present disclosure, the two groove walls of the heat exchange tube groove are symmetrical or asymmetrical relative to a centerline of the heat exchange tube groove perpendicular to the first and second directions when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, one of the two endpoints of the first heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment and one of the two endpoints of the second heat exchange tube guiding segment that is close to the first heat exchange tube guiding segment are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, one of the two endpoints of the first heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment and one of the two endpoints of the second heat exchange tube guiding segment that is close to the first heat exchange tube guiding segment are configured to substantially overlap with each other, and one of the two endpoints of the second heat exchange tube guiding segment that is close to the third heat exchange tube guiding segment and one of the two endpoints of the third heat exchange tube guiding segment that is close to the second heat exchange tube guiding segment are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, the first heat exchange tube guiding segment and the third heat exchange tube guiding segment are straight line segments, and the second heat exchange tube guiding segment is a circular arc segment when viewed in the direction perpendicular to the fin body.
According to the embodiments of the present disclosure, at least one of the plurality of heat exchange tubes is inserted into each of the plurality of the heat exchange tube grooves.
The embodiments of the present disclosure also provide an air conditioning system comprising the heat exchanger as described above.
By using the heat exchanger according to the embodiments of the present disclosure and the air conditioning system comprising the heat exchanger, for example, the performance of the heat exchanger and the air conditioning system may be improved.

Brief Description of the Drawings

FIG. 1 is a schematic front view of a heat exchanger according to an embodiment of the present disclosure;
FIG. 2 is a schematic right side view of the heat exchanger shown in FIG. 1;
FIG. 3 is a schematic top view of a heat exchanger according to an embodiment of the present disclosure, in which only one fin and several heat exchange tubes are shown;
FIG. 4 is a schematic enlarged view of a part A of the heat exchanger shown in FIG. 3;
FIG. 5 is a schematic top view of a fin of the heat exchanger shown in FIG. 3;
FIG. 6 is a schematic enlarged view of a part B of the fin of the heat exchanger shown in FIG. 5;
FIG. 7 is a schematic perspective view of a heat exchanger according to an embodiment of the present disclosure, in which only several fins and several heat exchange tubes are shown;
FIG. 8 is a schematic top view of the heat exchanger shown in FIG. 7;
FIG. 9 is a schematic perspective view of a heat exchanger according to an embodiment of the present disclosure, in which only several fins and several heat exchange tubes are shown;
FIG. 10 is a schematic top view of the heat exchanger shown in FIG. 9;
FIG. 11 is a schematic enlarged view of a part C of the heat exchanger shown in FIG. 10;
FIG. 12 is a schematic perspective view of a heat exchanger according to an embodiment of the present disclosure, in which only several fins and several heat exchange tubes are shown;
FIG. 13 is a schematic top view of the heat exchanger shown in FIG. 12; and
FIG. 14 is an enlarged schematic view of a part D of the heat exchanger shown in FIG. 13.

Detailed Description of the Invention

The present disclosure will be further explained in conjunction with the accompanying drawings and specific embodiments.
Referring to FIGS. 1 to 14, the heat exchanger 100 according to embodiments of the present disclosure comprises: a plurality of heat exchange tubes 1 arranged in a first direction D1; and a plurality of fins 2 arranged in a second direction D2 perpendicular to the first direction D1. Each of the plurality of fins 2 comprises a fin body 20 and a plurality of heat exchange tube grooves 21 formed in the fin body 20. At least one of the plurality of heat exchange tubes 1 is inserted into each of at least some of the plurality of heat exchange tube grooves 21. According to some examples of the present disclosure, at least one of the plurality of heat exchange tubes 1 is inserted into each of the plurality of heat exchange tube grooves 21. Referring to FIGS. 3 to 14, the heat exchange tube groove 21 comprises: an open first groove end 21-1 and a second groove end 21-2 opposite to the first groove end 21-1; and two opposite groove walls 213, and at least one of the two groove walls 213 of at least one of the plurality of heat exchange tube grooves 21 of at least one of the plurality of fins 2 comprises a plurality of heat exchange tube guiding segments 214. The plurality of heat exchange tube guiding segments 214 comprise: a first heat exchange tube guiding segment 214A and a second heat exchange tube guiding segment 214B arranged in sequence from the first groove end 21-1 to the second groove end 21-2. As shown in FIG. 6, a line connecting between two endpoints of the first heat exchange tube guiding segment 214A is inclined at a first angle α1 relative to a reference plane defined by the first direction D1 and the second direction D2, and a line connecting between two endpoints of the second heat exchange tube guiding segment 214B is inclined at a second angle α2 relative to the reference plane when viewed in a direction perpendicular to the fin body 20, and the second angle α2 is greater than the first angle α1 and less than 90 degrees. The plurality of heat exchange tube guiding segments 214 may further comprise a third heat exchange tube guiding segment 214C between the second heat exchange tube guiding segment 214B and the second groove end 21-2. As shown in FIG. 6, a line connecting between two endpoints of the third heat exchange tube guiding segment 214C is inclined at a third angle α3 relative to the reference plane when viewed in the direction perpendicular to the fin body 20, and the third angle α3 is greater than the second angle α2 and less than 90 degrees.
Referring to FIGS. 3 to 14, in the embodiment of the present disclosure, the plurality of heat exchange tube guiding segments 214 are straight line segments, circular arc segments, or a combination of straight line segments and circular arc segments when viewed in the direction perpendicular to the fin body 20. That is, a plurality of heat exchange tube guiding segments 214 are all straight line segments or all arc segments, or a combination of straight line segments and arc segments.
Referring to FIGS. 3 to 14, in the embodiment of the present disclosure, a width of a portion of the heat exchange tube groove 21 where the plurality of heat exchange tube guiding segments 214 are provided is configured to gradually decrease in a direction from the first groove end 21-1 to the second groove end 21-2 when viewed in the direction perpendicular to the fin body 20. As shown in FIG. 6, a maximum width W1, W2, W2 of each portion of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C are provided and the width W4 of a portion of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 are configured to gradually decrease.
Referring to FIGS. 3 and 4, in the embodiment of the present disclosure, a total size of the plurality of heat exchange tube guiding segments 214 in the direction from the first groove end 21-1 to the second groove end 21-2 is 1/4 of a size (i.e., length) SL of the heat exchange tube groove 21. At least one portion of at least one groove wall 213 of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 may be substantially perpendicular to the reference plane. The gap GM between at least one portion of at least one groove wall 213 of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 and the heat exchange tube 1 may be less than or equal to 0.15 mm.
Referring to FIGS. 3 to 14, in the embodiment of the present disclosure, two groove walls 213 of the heat exchange tube groove 21 are symmetrical or asymmetrical relative to a centerline of the heat exchange tube groove 21 perpendicular to the first direction D1 and the second direction D2 when viewed in the direction perpendicular to the fin body 20. For example, two groove walls 213 are configured to have the same guiding segment 214 or different guiding segments 214, or one of the two groove walls 213 is configured to have the guiding segment 214.
Referring to FIGS. 3 to 14, in the embodiment of the present disclosure, one of the two endpoints of the first heat exchange tube guiding segment 214A that is close to the second heat exchange tube guiding segment 214B and one of the two endpoints of the second heat exchange tube guiding segment 214B that is close to the first heat exchange tube guiding segment 214A are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body 20. For example, one of the two endpoints of the first heat exchange tube guiding segment 214A that is close to the second heat exchange tube guiding segment 214B and one of the two endpoints of the second heat exchange tube guiding segment 214B that is close to the first heat exchange tube guiding segment 214A are configured to substantially overlap with each other, and one of the two endpoints of the second heat exchange tube guiding segment 214B that is close to the third heat exchange tube guiding segment 214C and one of the two endpoints of the third heat exchange tube guiding segment 214C that is close to the second heat exchange tube guiding segment 214B are configured to substantially overlap with each other when viewed in the direction perpendicular to the fin body 20. The first heat exchange tube guiding segment 214A and the third heat exchange tube guiding segment 214C may be straight line segments, and the second heat exchange tube guiding segment 214B may be a circular arc segment when viewed in the direction perpendicular to the fin body 20. For example, other suitable straight or circular segments may also be comprised between adjacent heat exchange tube guiding segments.
Referring to FIG. 1, FIG. 7, and FIG. 8, in the embodiment of the present disclosure, the plurality of heat exchange tubes 1 comprise a plurality of rows of heat exchange tubes arranged in the first direction D1, and each row of heat exchange tubes is consisted of one heat exchange tube 1 or a plurality of heat exchange tubes 1. The one heat exchange tube 1 or the plurality of heat exchange tubes 1 of each of the plurality of rows of heat exchange tubes are inserted into one of the plurality of heat exchange tube grooves 21. And a length of at least one of the plurality of heat exchange tube grooves 21 of at least one of the plurality of fins 2 in a third direction D3 perpendicular to the first direction D1 and the second direction D2 is greater than a heat exchange tube size of a row of heat exchange tubes inserted therein in the third direction D3, in the case where the row of heat exchange tubes is consisted of one heat exchange tube 1, the heat exchange tube size is a size of said one heat exchange tube 1 in the third direction D3, while in the case where the row of heat exchange tubes is consisted of a plurality of heat exchange tubes 1, the heat exchange tube size is a sum of the sizes of the plurality of heat exchange tubes 1 in the third direction D3. Thereby, a gap 5 may be formed in the heat exchange tube grooves 21 for water to pass through. For example, the gap 5 forms a drainage channel through which defrosting water may quickly flow away, thereby improving a performance of the heat exchanger under frosting conditions.
Referring to FIGS. 1, 7 and 8, in the embodiments of the present disclosure, the plurality of heat exchange tube grooves 21 comprise a plurality of columns of heat exchange tube grooves arranged in the third direction perpendicular to the first direction D1 and the second direction D2. Each of the plurality of columns of heat exchange tube grooves comprises a plurality of heat exchange tube grooves 21 arranged in the first direction D1. FIGS. 7 and 8 show a first column of heat exchange tube grooves comprising a plurality of heat exchange tube grooves 21A and a second column of heat exchange tube grooves comprising a plurality of heat exchange tube grooves 21B. The first column of heat exchange tube grooves and the second column of heat exchange tube grooves are respectively located on a first side S1 and a second side S2 of the heat exchanger 100 opposite to each other in the third direction D3. In addition, the fin 2 may comprise three or more columns of heat exchange tube grooves. The fin body 20 of the fin 2 may have a generally flat plate shape. At least two of the heat exchange tube grooves 21 in the plurality of columns of heat exchange tube grooves of at least one of the plurality of fins 2 may have different lengths in the third direction D3. In some embodiments of the present disclosure, at least two of the plurality of heat exchange tube grooves 21 in at least one of the plurality of columns of heat exchange tube grooves 21 of at least one of a plurality of fins 2 have different lengths in the third direction D3. In some embodiments of the present disclosure, at least two of a plurality of heat exchange tube grooves 21 in at least one of a plurality of columns of heat exchange tube grooves of at least one of a plurality of fins 2 have different lengths in the third direction D3. In some other embodiments of the present disclosure, at least one of a plurality of heat exchange tube grooves 21 in at least one of a plurality of columns of heat exchange tube grooves 21 of a plurality of fins 2 and at least one of a plurality of heat exchange tube grooves 21 in at least another one of a plurality of columns of heat exchange tube grooves 21 of a plurality of fins 2 have different lengths in the third direction D3. For example, at least one of a plurality of heat exchange tube groove 21 in at least one of a plurality of columns of heat exchange tube grooves located on the first side S1 of the heat exchanger 100 in the third direction D3 of at least one of a plurality of fins 2, and at least one of a plurality of heat exchange tube groove 21 in at least another one of a plurality of columns of heat exchange tube grooves located on the second side S2 of the heat exchanger 100 opposite to the first side S1 in the third direction D3 of at least one of a plurality of fins 2 have different lengths in the third direction D3. For example, the length of at least one of a plurality of heat exchange tube groove 21 in at least one of a plurality of columns of heat exchange tube grooves located on the first side S1 of the heat exchanger 100 in the third direction D3 of at least one of a plurality of fins 2 in the third direction D3 is less than the length of at least one of a plurality of heat exchange tube groove 21 in at least another one of a plurality of columns of heat exchange tube grooves located on the second side S2 of the heat exchanger 100 opposite to the first side S1 in the third direction D3 of at least one of a plurality of fins 2 in the third direction D3.
Referring to FIGS. 1, 7 and 8, in an embodiment of the present disclosure, a plurality of heat exchange tube grooves 21 in at least one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 and a plurality of heat exchange tube grooves 21 in at least another one of a plurality of columns of heat exchange tube grooves of a plurality of fins may be alternately arranged in the first direction D1. The heat exchange tube groove 21 in columns of heat exchange tube grooves of the fins 2 is configured to have a first groove edge 211 and a second groove edge 212. The first groove edge 211 and the second groove edge 212 are located at the outermost side of the heat exchange tube groove 21 in the third direction D3, and in the third direction D3, the first groove edge 211 of the heat exchange tube groove 21 of the fin 2 is closer to the first side S1 of the heat exchanger 100 in the third direction D3 than the second groove edge 212 of the heat exchange tube groove 21 of the fin 2. The first groove edges 211 of a plurality of heat exchange tube groove 21 in at least one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 may be substantially aligned with each other in the third direction D3, and/or the second groove edges 212 of a plurality of heat exchange tube grooves 21 in at least one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 may be substantially aligned with each other in the third direction D3. A plurality of heat exchange tube grooves 21 in at least one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 may have substantially the same size in the third direction D3.
Referring to FIGS. 1, 7 and 8, in the embodiments of the present disclosure, a plurality of heat exchange tube grooves 21 located on the first side S1 of the heat exchanger 100 in the third direction D3 in at least one of a plurality of columns of heat exchange tube grooves of at least one of a plurality of fins 2 and a plurality of heat exchange tube grooves 21 located on the second side S2 of the heat exchanger 100 opposite to the first side S1 in the third direction D3 in at least another one of a plurality of columns of heat exchange tube grooves of at least one of a plurality of fins 2 are alternately arranged in the first direction D1. According to an example of the present disclosure, at least one of a plurality of heat exchange tube grooves 21 located on the first side S1 of the heat exchanger 100 in the third direction D3 in at least one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 and at least one of a plurality of heat exchange tube grooves 21 located on the second side S2 of the heat exchanger 100 opposite to the first side S1 in the third direction D3 in at least another one of a plurality of columns of heat exchange tube grooves of a plurality of fins 2 are offset from each other in the first direction D 1.
Referring to FIGS. 1, 7 and 8, in an embodiment of the present disclosure, a plurality of columns of heat exchange tube grooves of a plurality of fins 2 comprise first and second columns of heat exchange tube grooves respectively located on the first side S1 and second side S2 of the heat exchanger 100 opposite to each other in the third direction D3. The plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of a plurality of fins 2 are configured to open towards the first side S1 of the heat exchanger 100, and the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of a plurality of fins 2 are configured to open towards the second side S2 of the heat exchanger 100.
Referring to FIGS. 1, 7 and 8, in an embodiment of the present disclosure, the second groove edges 212 of at least two of the plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of a plurality of fins 2 are offset from each other in the third direction D3, and/or the first groove edges 211 of at least two of the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of a plurality of fins 2 are offset from each other in the third direction D3. At least one of the plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of a plurality of fins 2 and at least one of the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of a plurality of fins 2 are offset from each other in the first direction D1. At least one of the plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of a plurality of fins 2 may be substantially aligned with at least one of the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of a plurality of fins 2 in the first direction D1. According to the embodiments of the present disclosure, by offsetting the groove edges of the heat exchange tube grooves in the third direction D3 and offsetting the heat exchange tube grooves in the first direction D1, a flow path for discharging a condensate water may be shortened, which is conducive to rapidly discharge the condensate water, reduce the windage resistance, and adjust an amount of the condensed condensate water.
Referring to FIGS. 1, 7 and 8, in an embodiment of the present disclosure, the length of at least one of a plurality of heat exchange tube groove 21A in the first column of heat exchange tube grooves of at least one of a plurality of fin 2 in the third direction D3 is greater than the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3, and/or the length of at least one of a plurality of heat exchange tube groove 21B in the second column of heat exchange tube grooves of at least one of a plurality of fin 2 in the third direction D3 is greater than the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3. In an embodiment of the present disclosure, the length of at least one of a plurality of heat exchange tube groove 21A in the first column of heat exchange tube grooves of at least one of a plurality of fin 2 in the third direction D3 is substantially equal to the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3, and/or the length of at least one of a plurality of heat exchange tube groove 21B in the second column of heat exchange tube grooves of at least one of a plurality of fin 2 in the third direction D3 is substantially equal to the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3.
Referring to FIGS. 1, 7 and 8, in an embodiment of the present disclosure, the heat exchange tubes 1 in the rows of the heat exchange tubes disposed in the plurality of heat exchange tube grooves 21 or in a plurality of columns of heat exchange tube grooves of the plurality of fins 2 comprise a plurality of columns of heat exchange tubes arranged in the third direction D3, and each of the plurality of columns of heat exchange tubes comprises a plurality of heat exchange tubes 1 arranged in the first direction D1. For example, the first column of heat exchange tubes comprise a plurality of heat exchange tubes 1A, the second column of heat exchange tubes comprise a plurality of heat exchange tubes 1B, the third column of heat exchange tubes comprise a plurality of heat exchange tubes 1C, the fourth column of heat exchange tubes comprise a plurality of heat exchange tubes 1D, and so on. Referring to FIGS. 1 and 2, in an embodiment of the present disclosure, a heat exchange tube 1 in the plurality of columns of heat exchange tubes 1 comprises a first end 18 located on one side of the heat exchange tube in the second direction D2 and a second end 19 located on the other side of the heat exchange tube 1 in the second direction D2.
In one example, the heat exchanger 100 further comprises a first collecting tube connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1; and a second collecting tube connected to and in fluid communication with the second ends 19 of heat exchange tubes 1.
In another example, the heat exchanger 100 further comprises a first collecting tube connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1 in a plurality of columns of heat exchange tubes; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1 in at least one of a plurality of columns of heat exchange tubes, and the other of the two second collecting tubes is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1 in at least another one of a plurality of columns of heat exchange tubes.
In another example, referring to FIGS. 1 and 2, the heat exchanger 100 further comprises a connecting portion 6, through which the first end 18 of the heat exchange tube 1 in one of the plurality of columns of heat exchange tubes is connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1 in another one of the plurality of columns of heat exchange tubes; and two second collecting tubes 32, one of which is connected to and in fluid communication with a second ends 19 of the heat exchange tubes 1 in the one column of heat exchange tubes, and the other of which is connected to and in fluid communication with a second ends 19 of the heat exchange tubes 1 in the another column of heat exchange tubes. The connecting portion 6 may be a plurality of connecting pipes 60, through which a first ends 18 of the heat exchange tubes 1 in the one column of heat exchange tubes are connected to and in fluid communication with a first ends 18 of the heat exchange tubes 1 in the another column of heat exchange tubes. The connecting portion 6 may also make the first ends 18 of the heat exchange tubes 1 in the one column of heat exchange tubes connected to and being in fluid communication with the first ends 18 of the heat exchange tubes 1 in the another one column of heat exchange tubes, instead of making the first ends 18 of the heat exchange tubes 1 in the one column of heat exchange tubes connected to and being in fluid communication with the first ends 18 of the heat exchange tubes 1 in the another one column of heat exchange tubes via one-to-one correspondence. The heat exchange tubes 1 in one column of heat exchange tubes, the connecting tubes 60, and the heat exchange tubes 1 in another column of heat exchange tubes that are interconnected with one another may be formed by a single bent tube. In the example shown in FIGS. 1 and 2, the first ends 18 of the heat exchange tubes 1 in two of a plurality of columns of heat exchange tubes are connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1 in another two of a plurality of columns of heat exchange tubes. One of the two second collecting tubes 32 is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1 in two columns of the heat exchange tubes, and the other one of the two second collecting tubes 32 is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1 in the other two columns of the heat exchange tubes. More specifically, the plurality of columns of heat exchange tubes comprise a first column of heat exchange tubes (comprising the heat exchange tubes 1A), a second column of heat exchange tubes(comprising the heat exchange tubes 1B), a third column of heat exchange tubes(comprising the heat exchange tubes 1C), and a fourth column of heat exchange tubes (comprising the heat exchange tubes 1D) arranged in sequence in the first direction D1. The heat exchanger 100 further comprises a first connecting portion 6A and a second connecting portion 6B, wherein the first ends 18 of the heat exchange tubes 1A in the first column of heat exchange tubes are connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1C in the third column of heat exchange tubes through the first connecting portion 6A, and the first ends 18 of the heat exchange tubes 1B in the second column of heat exchange tubes are connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1D in the fourth column of heat exchange tubes through the second connecting portion 6B; and two second collecting tubes 32, one of which is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1A in the first column of heat exchange tubes and the heat exchange tubes 1B in the second column of heat exchange tubes, and the other of which is connected to and in fluid communication with the second ends 19 of the heat exchange tubes 1C in the third column of heat exchange tubes and the heat exchange tubes 1D in the fourth column of heat exchange tubes. For example, the first connecting portion 6A comprises a plurality of first connecting tubes 60A, through which the first ends 18 of the heat exchange tubes 1A in the first column of heat exchange tubes are connected to and in fluid communication with the first ends 18 of the heat exchange tubes 1C in the third column of heat exchange tubes respectively; and the second connecting portion 6B may comprise for example a plurality of second connecting tubes 60B, through which the first ends 18 of the heat exchange tubes 1B in the second column of heat exchange tubes are connected to and in fluid communication with the first ends 18 of the heat exchange tube 1D in the fourth column of heat exchange tubes respectively. The heat exchange tubes 1A in the first column of heat exchange tubes, the first connecting tubes 60A, and the heat exchange tubes 1C in the third column of heat exchange tubes that are interconnected with one another may be formed by a single bent tube; and the heat exchange tubes 1B in the second column of heat exchange tubes, the second connecting tubes 60B, and the heat exchange tubes 1D in the fourth column of heat exchange tubes that are interconnected with one another may be formed by a single bent tube.
In a further example, the heat exchanger 100 further comprises two first collecting tubes and two second collecting tubes, one of the two first collecting tubes and one of the two second collecting tubes being respectively connected to and in fluid communication with the first ends 18 and the second ends 19 of the heat exchange tubes 1 in at least one of a plurality of columns of the heat exchange tubes, and the other one of the two first collecting tubes and the other one of the two second collecting tubes being respectively connected to and in fluid communication with the first ends 18 and the second ends 19 of the heat exchange tubes 1 in at least another one of the plurality of columns of the heat exchange tubes.
Referring to FIGS. 1 and 2, in an embodiment of the present disclosure, at least one portion of the heat exchange tube 1 is configured to extend substantially vertically during use. For example, the heat exchange tube 1 is configured to extend substantially vertically. In addition, at least one portion of the heat exchange tube 1 may also extend substantially horizontally or obliquely, for example, heat exchange tube 1 may extend substantially horizontally or obliquely. In an embodiment of the present disclosure, each of at least some of the fins 2 is formed by a single plate. For example, the fin 2 is formed by a single plate. The fin body 20 of the fin 2 may be inclined relative to the plane defined by the first direction D1 and the third direction D3. The angle between the fin body 20 of the fin 2 and the plane defined by the first direction D1 and the third direction D3 may be less than or equal to 45 degrees. When the heat exchanger is used as an evaporator, condensate water is generated, and tilting the fin body 20 of the fin 2 would facilitate to smoothly discharge the condensate water and reduce the windage resistance.
In the examples shown in FIGS. 7 and 8, a plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves are configured to open towards the first side S1 of heat exchanger 100, and a plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves are configured to open towards the second side S2 of heat exchanger 100. The columns of heat exchange tube grooves comprise heat exchange tube grooves 21 of different lengths. The plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves and the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves are offset from each other in the first direction D1. The spacing between the plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves is substantially the same as the spacing between the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves. The heat exchange tubes 1 are configured to have the same size (i.e. width Tw) in the third direction D3. The length SL of some heat exchange tube grooves 21 is greater than the size of the heat exchange tubes inserted therein in the third direction D3 (i.e. width Tw), and the length SL of some heat exchange tube grooves 21 is equal to the size of the heat exchange tubes inserted therein in the third direction D3 (i.e. width Tw). At least one of the plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of a plurality of fins 2 and at least one of the plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of the plurality of fins 2 are offset from each other in the first direction D1. Correspondingly, the heat exchange tube 1 in at least one of a plurality of heat exchange tube grooves 21A in the first column of heat exchange tube grooves of the plurality of fins 2 and the heat exchange tube 1 in at least one of a plurality of heat exchange tube grooves 21B in the second column of heat exchange tube grooves of the plurality of fins 2 are offset from each other in the first direction D 1.
In an embodiment of the present disclosure, the heat exchange tube body 10 of the heat exchange tube 1 may be a flat tube or any heat exchange tube having two planes generally parallel with each other.
In the embodiment shown in FIGS. 7 and 8, the length SL of some of the plurality of the heat exchange tube grooves 21 of the plurality of fins 2 in the third direction D3 is greater than the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3 or greater than the size of the heat exchange tubes 1 inserted therein in the third direction D3 (i.e., width Tw), while the length SL of some other of the plurality of the heat exchange tube grooves 21 of the plurality of fins 2 in the third direction D3 is equal to the heat exchange tube size of the row of the heat exchange tubes inserted therein in the third direction D3 or equal to the size of the heat exchange tubes 1 inserted therein in the third direction D3 (i.e., width Tw).
The air conditioning system according to an embodiment of the present disclosure comprises the heat exchanger 100 as described above. More specifically, the air conditioning system comprises: a compressor, a condenser, an evaporator, an expansion valve and so on. At least one of the condenser and evaporator may be the aforementioned heat exchanger 100.
By using the heat exchanger according to the embodiments of the present disclosure and the air conditioning system comprising the heat exchanger, for example, the performance of the heat exchanger and the air conditioning system may be improved.
According to an embodiment of the present disclosure, referring to FIG. 3 to FIG. 6, a plurality of heat exchange tube guiding segments 214 with different angles relative to the centerline of the heat exchange tube groove 21 are used, and the angle gradually transitions from a large value to a small value, and a width of the portion of the heat exchange tube groove 21 where a plurality of heat exchange tube guiding segments 214 are provided is configured to gradually decrease in the direction from the first groove end 21-1 to the second groove end 21-2. The flat tube is gradually inserted into the portion of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2.
According to an embodiment of the present disclosure, referring to FIG. 3 to FIG. 6, a plurality of heat exchange tube guiding segments 214 that are inclined at different angles relative to the reference plane defined by the first direction D1 and the second direction D2 are used. An opening angle (90 degrees - α1) of the first heat exchange tube guiding segment 214A is relatively large, and a maximum width W1 of the portion of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A is provided is relatively large. The first angle α1, the second angle α2, and the third angle α3 of the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C are configured to gradually increase, and the maximum widths W1, W2, and W2 of the portions of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C are provided and the width W4 of the portion of the heat exchange tube groove 21 located between a plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 are configured to gradually decrease. The heat exchange tube is initially guided in the first heat exchange tube guiding segment 214A when it is inserted. As the heat exchange tube enters the portion of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A is provided, the relative positions between the fins and the heat exchange tubes will also be initially adjusted into a relatively small range. Then, the heat exchange tube will continue to enter the heat exchange tube groove due to the guidance of the portion of the heat exchange tube groove 21 where the second heat exchange tube guiding segment 214B is provided, the opening angle (90 degrees - α2) of the second heat exchange tube guiding segment 214B is smaller than the opening angle of the first heat exchange tube guiding segment 214A (90 degrees - α1), and the width of the portion of the heat exchange tube groove 21 where the second heat exchange tube guiding segment 214B is provided is smaller than that of the portion of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A is provided, thus the relative positions between the heat exchange tubes and the heat exchange tube grooves will be further reduced. Correspondingly, the heat exchange tube will be gradually guided by the subsequent heat exchange tube guiding segment to the main heat exchange tube groove area. Due to the opening angles of the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C, and the gradual transition of the widths of each of the portions of the heat exchange tube groove 21 where the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C are provided, the heat exchange tubes will not be stuck in local positions. In addition, as shown in FIG. 4, the gap GM between at least one portion of at least one groove wall 213 of the heat exchange tube groove 21 located between a plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 and the heat exchange tube 1 may be less than or equal to 0.15 mm. The distance between the groove wall 213 of heat exchange tube groove 21 and the surface of the nearest heat exchange tube 1 is GM, which is less than or equal to 0.15mm. Thus, effective welding of the heat exchange tubes and fins may be ensured, reducing a waste of a heat exchange area of the fins.
According to an embodiment of the present disclosure, referring to FIG. 3 to FIG. 6, a plurality of heat exchange tube guiding segments 214 comprise: a first heat exchange tube guiding segment 214A, a second heat exchange tube guiding segment 214B, and a third heat exchange tube guiding segment 214C. The first angle α1 is less than the second angle α2, which is less than the third angle α3. The opening angles 90- α1, 90- α2, and 90-α3 of the first heat exchange tube guiding segment 214A, the second heat exchange tube guiding segment 214B, and the third heat exchange tube guiding segment 214C are configured to gradually decrease. The maximum widths W1, W2, and W3 of respective portions of the heat exchange tube groove 21 where the first, second, and third heat exchange tube guiding segments 214A, 214B, and 214C are provided, and the width W4 of the portion of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 are configured to gradually decrease (W1>W2>W3>W4). The total size of the plurality of heat exchange tube guiding segments 214 in the direction from the first groove end 21-1 to the second groove end 21-2 is 1/4 of the size (length) SL of the heat exchange tube groove 21. The gap GM between the portion of the groove wall 213 of the heat exchange tube groove 21 located between the plurality of heat exchange tube guiding segments 214 and the second groove end 21-2 and the surface of the heat exchange tube 1 is less than or equal to 0.15mm.
According to an embodiment of the present disclosure, referring to FIG. 9 to FIG. 11, at least one of the plurality of heat exchange tube guiding segments 214 is a circular arc segment. For example, the first heat exchange tube guiding segment 214A and the third heat exchange tube guiding segment 214C may be straight line segments, and the second heat exchange tube guiding segment 214B may be a circular arc segment. If a plurality of heat exchange tube guiding segments 214 are straight line segments, the sharp corners at the intersections of the two heat exchange tube guiding segments 214 may scratch the surface of the heat exchange tubes during the guiding process, leading to potential quality issues. The circular arc segments will reduce the sharp parts, making the guidance much smoother and reducing the risk of damage to the heat exchange tube.
According to an embodiment of the present disclosure, referring to FIG. 12 to FIG. 14, one of the two groove walls 213 comprises a plurality of heat exchange tube guiding segments 214, while the other one of the two groove walls 213 does not have the heat exchange tube guiding segment 214 and is perpendicular to the reference plane defined by the first direction D1 and the second direction D2. The two groove walls 213 are not completely symmetrical.
According to an embodiment of the present disclosure, by setting a plurality of heat exchange tube guiding segments 214, the higher efficiency may be achieved during the assembly process of the product. In addition, due to the guiding effect of the plurality of heat exchange tube guiding segments 214, the damage to the fin ends is reduced during the process of the insertion of heat exchange tubes into the heat exchange tube grooves, thus the yield is improved. A specified size is set between the heat exchange tube guiding segments 214 and the surface of the heat exchange tubes, thereby increasing a welding fit ratio between the fins and the heat exchange tube. The welding fit area between the fins and the heat exchange tubes is larger and more sufficient, thereby reducing ineffective fins or the waste of the heat exchange area of heat exchange tubes.
According to an embodiment of the present disclosure, the plurality of heat exchange tube guiding segments 214 may comprise two, four, or more heat exchange tube guiding segments, and the corresponding endpoints of adjacent heat exchange tube guiding segments may overlap with or be spaced apart from each other, as long as the guiding function is achieved.
Although the above embodiments have been described, some features of the above embodiments and/or some embodiments of the above embodiments may be combined to form new embodiments.

Claims

A heat exchanger comprising:
a plurality of heat exchange tubes arranged in a first direction; and

a plurality of fins arranged in a second direction perpendicular to the first direction, each of which comprises a fin body and a plurality of heat exchange tube grooves formed in the fin body, with at least one of the plurality of heat exchange tubes being inserted into each of at least some of the plurality of heat exchange tube grooves,

wherein the heat exchange tube groove comprises:
an open first groove end and a second groove end opposite to the first groove end; and

two opposite groove walls, and at least one of the two groove walls of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins comprises a plurality of heat exchange tube guiding segments comprising:
a first heat exchange tube guiding segment and a second heat exchange tube guiding segment arranged in sequence from the first groove end to the second groove end, wherein, a line connecting between two endpoints of the first heat exchange tube guiding segment is inclined at a first angle relative to a reference plane defined by the first and second directions, and a line connecting between two endpoints of the second heat exchange tube guiding segment is inclined at a second angle relative to the reference plane when viewed in a direction perpendicular to the fin body, and the second angle is greater than the first angle and less than 90 degrees.
The heat exchanger according to claim 1, wherein
the plurality of heat exchange tube guiding segments further comprise a third heat exchange tube guiding segment between the second heat exchange tube guiding segment and the second groove end, a line connecting between two endpoints of the third heat exchange tube guiding segment is inclined at a third angle relative to the reference plane when viewed in the direction perpendicular to the fin body, and the third angle is greater than the second angle and less than 90 degrees.
The heat exchanger according to claim 1, wherein
the plurality of heat exchange tubes comprise a plurality of rows of heat exchange tubes arranged in the first direction, each row of heat exchange tubes consisting of one heat exchange tube or a plurality of heat exchange tubes;

the one heat exchange tube or the plurality of heat exchange tubes of each of the plurality of rows of heat exchange tubes are inserted into one of the plurality of heat exchange tube grooves; and

the length of at least one of the plurality of heat exchange tube grooves of at least one of the plurality of fins in a third direction perpendicular to the first and second directions is greater than a heat exchange tube size of a row of heat exchange tubes inserted therein in the third direction, in the case where the row of heat exchange tubes is consisted of one heat exchange tube, the heat exchange tube size is the size of that one heat exchange tube in the third direction, while in the case where the row of heat exchange tubes is consisted of a plurality of heat exchange tubes, the heat exchange tube size is a sum of the sizes of the plurality of heat exchange tubes in the third direction.
The heat exchanger according to claim 3, wherein
the heat exchange tubes in the rows of the heat exchange tubes disposed in the plurality of heat exchange tube grooves of the plurality of fins comprise a plurality of columns of heat exchange tubes arranged in the third direction, and each of the plurality of columns of heat exchange tubes comprises a plurality of heat exchange tubes arranged in the first direction.
The heat exchanger according to claim 4, wherein
a heat exchange tube in a plurality of columns of heat exchange tubes comprises a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction; and

the heat exchanger further comprises a connecting portion, through which the first ends of the heat exchange tubes in one of the plurality of columns of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in another one of the plurality of columns of heat exchange tubes respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in one column of heat exchange tubes, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in another column of heat exchange tubes respectively.
The heat exchanger according to claim 5, wherein
the connecting portion comprises a plurality of connecting tubes, through which the first ends of the heat exchange tubes in the one column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the another column of heat exchange tubes respectively.
The heat exchanger according to claim 6, wherein
the heat exchange tubes in the one column of heat exchange tubes, the connecting tubes, and the heat exchange tubes in the another column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.
The heat exchanger according to claim 4, wherein
the heat exchange tube in a plurality of columns of heat exchange tubes comprise a first end located on one side of the heat exchange tube in the second direction and a second end located on the other side of the heat exchange tube in the second direction;

the plurality of columns of heat exchange tubes comprise a first column of heat exchange tubes, a second column of heat exchange tubes, a third column of heat exchange tubes, and a fourth column of heat exchange tubes arranged in sequence in the first direction;

the heat exchanger further comprises a first connecting portion and a second connecting portion, wherein the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes through the first connecting portion respectively, and the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes through the second connecting portion respectively; and two second collecting tubes, one of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the first column of heat exchange tubes and the second column of heat exchange tubes respectively, and the other of which is connected to and in fluid communication with the second ends of the heat exchange tubes in the third column of heat exchange tubes and the fourth column of heat exchange tubes respectively.
The heat exchanger according to claim 8, wherein
the first connecting portion comprises a plurality of first connecting tubes, through which the first ends of the heat exchange tubes in the first column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the third column of heat exchange tubes respectively; and

the second connecting portion comprises a plurality of second connecting tubes, through which the first ends of the heat exchange tubes in the second column of heat exchange tubes are connected to and in fluid communication with the first ends of the heat exchange tubes in the fourth column of heat exchange tubes respectively.
The heat exchanger according to claim 9, wherein
the heat exchange tubes in the first column of heat exchange tubes, the first connecting tubes, and the heat exchange tubes in the third column of heat exchange tubes that are interconnected with one another are formed by a single bent tube; and

the heat exchange tubes in the second column of heat exchange tubes, the second connecting tubes, and the heat exchange tubes in the fourth column of heat exchange tubes that are interconnected with one another are formed by a single bent tube.
The heat exchanger according to claim 1, wherein
the plurality of heat exchange tube grooves comprise a plurality of columns of the heat exchange tube grooves arranged in a third direction perpendicular to the first and second directions, each of the plurality of columns of the heat exchange tube grooves comprising a plurality of heat exchange tube grooves arranged in the first direction.
The heat exchanger according to claim 11, wherein
at least two of a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins have different lengths in the third direction.
The heat exchanger according to claim 11, wherein
a plurality of heat exchange tube grooves in at least one of a plurality of columns of heat exchange tube grooves of the plurality of fins and a plurality of heat exchange tube grooves in at least another one of a plurality of columns of heat exchange tube grooves of the plurality of fins are alternately arranged in the first direction.
The heat exchanger according to claim 1, wherein
the width of the portion of the heat exchange tube groove where the plurality of heat exchange tube guiding segments are provided is configured to gradually decrease in a direction from the first groove end to the second groove end when viewed in the direction perpendicular to the fin body.
The heat exchanger according to claim 1, wherein
the plurality of heat exchange tube guiding segments are straight line segments, circular arc segments, or a combination of the straight line segments and circular arc segments when viewed in the direction perpendicular to the fin body.