Flat tubes, heat exchange cores and heat exchangers

Abstract

Disclosed are a flat tube, a heat exchange core, and a heat exchanger, wherein the flat tube includes a tube body, the tube body including at least a first tube body and a second tube body, the first tube body having a plurality of first hole passages extending along the length direction of the tube body, the plurality of first hole passages being arranged along the width direction of the first tube body, the second tube body having a plurality of second hole passages extending along the length direction of the tube body, the plurality of second hole passages being arranged along the width direction of the second tube body, the first tube body having a first wall along the thickness direction of the first tube body, and the second tube body having a second wall along the thickness direction of the second tube body, the first wall of the first tube body and the second wall of the second tube body being arranged opposite each other and being welded and fixed together, thereby dividing the tube body into a first tube body having the first hole passages and a second tube body having the second hole passages, and the first tube body and the second tube body being processed and shaped respectively and being welded and fixed together, thereby reducing the difficulty of manufacturing the flat tube.

Description

Technical Field

[0001] This application claims the priority of a Chinese patent application filed with the China National Intellectual Property Administration on October 28, 2022, with the application number 202211331545.1 and the invention title "Flat Tube, Heat Exchange Core and Heat Exchanger", and all of its contents are incorporated herein by reference.

[0002] This application relates to the technical field of heat exchange, and specifically relates to a flat tube, a heat exchange core including the flat tube, and a heat exchanger.

Background Art

[0003] Heat exchangers generally use flat tubes to allow fluids to flow through. The pore channels in the flat tubes are generally arranged in a single row along the width direction of the flat tube. To improve the heat exchange effect of the heat exchanger, the pore channels in the flat tube are arranged in two or more rows to increase the contact area between the fluid and the flat tube. Flat tubes are generally extruded. Flat tubes with two or more rows of pore channels have high requirements for the extrusion die and the extrusion process, and the manufacturing difficulty is great.

Summary of the Invention

Problems to be Solved by the Invention

[0004] An object of this application is to provide a flat tube that is easy to manufacture, a heat exchange core including the flat tube, and a heat exchanger including the heat exchange core.

Means for Solving the Problems

[0005] One embodiment of this application provides a flat tube, including a tube body. The tube body includes at least a first tube body and a second tube body. The first tube body includes a plurality of first pore channels extending along the length direction of the tube body. The second tube body includes a plurality of second pore channels extending along the length direction of the tube body. Along the thickness direction of the first tube body, the first tube body includes a first wall. Along the thickness direction of the second tube body, the second tube body includes a second wall. The first wall of the first tube body and the second wall of the second tube body are arranged opposite to each other and are fixed by welding.

[0006] According to the above technical solution, the tubular body is partitioned into a first tubular body having a first channel and a second tubular body having a second channel. The first tubular body and the second tubular body are each processed and formed, and are welded and fixed, reducing the difficulty of manufacturing the flat tube.

[0007] One embodiment of the present application provides a heat exchange core, including a first confluence member, a second confluence member, and a plurality of flat tubes. The flat tubes are the above-mentioned flat tubes. Along the length direction of the flat tubes, the flat tubes include a first end connected to the first confluence member and a second end connected to the second confluence member. Both the first confluence member and the second confluence member include at least one chamber. The first channel and the second channel of the flat tube both communicate with at least one chamber of the first confluence member and at least one chamber of the second confluence member. The heat exchanger is provided with a first fluid passage. The first channel, the second channel, the chambers of the first confluence member, and the chambers of the second confluence member are at least a part of the first fluid passage.

[0008] According to the above technical solution, both the first channel and the second channel are part of the first fluid passage, and there is no requirement for heat exchange between the fluid in the first channel and the fluid in the second channel, reducing the welding requirement between the first tubular body and the second tubular body.

[0009] One embodiment of the present application provides a heat exchanger, including a housing and a heat exchange core. The heat exchange core is the above-mentioned heat exchange core. The housing is sealed and fixed to the first confluence member and sealed and fixed to the second confluence member. The interior of the housing is provided with a medium chamber. The heat exchanger is provided with a second fluid passage. The first fluid passage and the second fluid passage do not communicate with each other. The medium chamber is at least a part of the second fluid passage.

[0010] One embodiment of the present application provides a heat exchanger, including a housing and a heat exchange core accommodated in the housing. The heat exchange core is the above-mentioned heat exchange core. The housing includes a first body and a second body that are hermetically fixed. The first confluence member includes a first cavity and a second cavity. The housing is provided with a first port and a second port. The first cavity communicates with the first port, and the second cavity communicates with the second port.

[0011] In the above technical solution, since the heat exchanger includes the above-mentioned flat tube and the heat exchange core, it has the effect of facilitating manufacturing in the same way.

Brief Description of the Drawings

[0012]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Embodiments for Carrying Out the Invention

[0013] Hereinafter, specific examples will be described in detail with reference to the drawings. In order to fully understand the present invention, a plurality of specific details are mentioned in the following detailed description. However, as can be understood by those skilled in the art, the specific units, devices and features shown in the drawings and described herein are not limiting, but are merely exemplary.

[0014] The flat tube 1 is generally used in the heat exchanger 100. A plurality of passages for fluid flow are provided in the flat tube 1. As shown in FIGS. 1 to 7, the flat tube 1 includes a tube body. The tube body is fixed by welding the first tube body 11 and the second tube body 12. Specifically, the first tube body 11 is a flat tube. Along the thickness direction of the first tube body 11, the first tube body 11 includes a first wall 112 and a third wall 111. The second tube body 12 is a flat tube. Along the thickness direction of the second tube body 12, the second tube body 12 includes a second wall 121 and a fourth wall 122. The first wall 112 of the first tube body 11 and the second wall 121 of the second tube body 12 are arranged opposite to each other and are fixed by welding.

[0015] As shown in Fig. 1, the direction L is the length direction of the flat tube 1 and also the length direction of the first tube body 11 and the second tube body 12. The direction W is the width direction of the flat tube 1 and also the width direction of the first tube body 11 and the second tube body 12. As shown in Fig. 2, the direction H is the thickness direction of the flat tube 1 and also the thickness direction of the first tube body 11 and the second tube body 12. The first tube body 11 is provided with a plurality of first pore passages 115 extending along the length direction of the tube body, and the plurality of first pore passages 115 are arranged in a row along the width direction of the first tube body 115. The second tube body 12 is provided with a plurality of second pore passages 125 extending along the length direction of the tube body, and the plurality of second pore passages 125 are arranged along the width direction of the second tube body 12, partitioning the tube body into the first tube body 11 having the first pore passages 115 and the second tube body 12 having the second pore passages 125. The first tube body 11 and the second tube body 12 are each processed and formed and then welded and fixed, reducing the difficulty of manufacturing the flat tube 1. For example, the first tube body 11 and the second tube body 12 are each extrusion-molded. The structures of the first tube body 11 and the second tube body 12 are simple, the requirements for the extrusion-molding die and the extrusion-molding process are low, the extrusion molding is easy, and the welding process of the first tube body 11 and the second tube body 12 is also simple, thus reducing the difficulty of manufacturing the flat tube 1. Of course, the flat tube 1 may further be laminated from three or more flat tubes along the thickness direction and then welded and fixed.

[0016] In some embodiments, FIGS. 2 and 4 are combined. The cross-sections of the first channel 115 and the second channel 125 are circular. Along the thickness direction of the first tube body 11, the distance between the wall 13 forming the first channel and the third wall 111 is defined as a1, the distance between the wall 13 forming the first channel and the first wall 112 is defined as b1, and a1>b1. Along the thickness direction of the second tube body 12, the distance between the wall 14 forming the second channel and the fourth wall 122 is defined as a2, the distance between the wall 14 forming the second channel and the second wall 121 is defined as b2, and a2>b2. The third wall 111 and the fourth wall 122 are the outer surfaces of the tube body, and the first wall 112 and the second wall 121 are welded and fixed. Therefore, the pressure received by the first wall 112 and the second wall 121 cancels each other out. By controlling to make a1>b1 and / or a2>b2, on the premise that the thickness of the tube body is constant, the strength of the tube body is improved, which is suitable for working conditions with a large internal fluid pressure, for example, a CO2 heat exchanger.

[0017] In some embodiments, FIGS. 3 and 5 are combined. Along the width direction of the first tube body 11, the distance between two adjacent first channels 115 is defined as c1, that is, the distance between the wall 13 forming the first channel and the wall 13 forming the adjacent first channel is defined as c1. The same first channel 115 satisfies c1<b1. Along the width direction of the second tube body 12, the distance between two adjacent second channels 125 is defined as c2, that is, the distance between the wall 14 forming the second channel and the wall 14 forming the adjacent second channel is defined as c2. The same second channel 125 satisfies c2<b2. Since the internal pressure between adjacent first channels 115 or adjacent second channels 125 can cancel each other out, the distance between adjacent channels is set small, with little impact on the strength of the flat tube 1. On the premise that the width of the flat tube 1 is constant, more channels can be arranged to increase the contact area between the fluid in the channels and the flat tube 1, thereby improving the heat exchange performance.

[0018] In some embodiments, as shown in FIG. 6, the wall 13 forming the first pore channel includes a first straight wall portion 131, a third straight wall portion 132, a fourth straight wall portion 133, and a first arcuate wall portion 134. The first arcuate wall portion 134 protrudes toward the third wall 111. The first straight wall portion 131 is closer to the first wall 112 than the first arcuate wall portion 134. The third straight wall portion 132 connects the first straight wall portion 131 and the first arcuate wall portion 134. The fourth straight wall portion 133 connects the first straight wall portion 131 and the first arcuate wall portion 134. As shown in FIG. 6, the first pore channel is substantially D-shaped. Of course, the third straight wall portion 132 and the first straight wall portion 131 do not have to be perpendicular, and the fourth straight wall portion 133 and the first straight wall portion 131 do not have to be perpendicular either. Along the thickness direction of the first tube body 11, the distance between the first arcuate wall portion 134 and the third wall 111 is a1, the distance between the first straight wall portion 131 and the first wall 112 is b1, and a1 > b1. The wall 14 forming the second pore channel includes a second straight wall portion 141, a fifth straight wall portion 142, a sixth straight wall portion 143, and a second arcuate wall portion 144. The second arcuate wall portion 144 protrudes toward the fourth wall 122. The second straight wall portion 141 is closer to the second wall 121 than the second arcuate wall portion 144. The fifth straight wall portion 142 connects the second straight wall portion 141 and the second arcuate wall portion 144. The sixth straight wall portion 143 connects the second straight wall portion 141 and the second arcuate wall portion 144. Along the thickness direction of the second tube body 12, the distance between the second arcuate wall portion 144 and the fourth wall 122 is a2, the distance between the second straight wall portion 141 and the second wall 121 is b2, and a2 > b2. The arcuate structure contributes to the improvement of strength. By arranging the wall portion close to the outer surface of the tube body as an arcuate structure, the strength of the flat tube 1 is improved.

[0019] In some embodiments, as shown in FIG. 7, the wall 13 forming the first channel includes a first wall 135, a second wall 136, a third wall portion 137, and a fourth wall portion 138. The first wall 135 and the second wall 136 are arranged along the thickness direction of the first tube body 11, the third wall portion 137 and the fourth wall portion 138 are arranged along the width direction of the first tube body 11. The third wall portion 137 connects the first wall 135 and the second wall 136, and the fourth wall portion 138 connects the first wall 135 and the second wall 136. As shown in FIG. 7, the first channel 115 is a rectangular hole. Of course, the first channel 115 may also be a trapezoidal hole. On the first wall 135 and the second wall 136, there are provided first ribs 139 protruding towards each other. The first wall 135 is closer to the third wall 111 than the second wall 136. Along the thickness direction of the first tube body 11, the distance between the first wall 135 and the third wall 111 is a1, and the distance between the second wall 136 and the first wall 112 is b1, and a1 > b1. By arranging the first ribs 139, the contact area between the fluid in the first channel 115 and the first tube body 11 is increased, and the heat exchange effect of the flat tube 1 is improved. The wall 14 forming the second channel includes a fifth wall portion 145, a sixth wall portion 146, a seventh wall portion 147, and an eighth wall portion 148. On the fifth wall portion 145 and the sixth wall portion 146, there are provided second ribs 149 protruding towards each other. The fifth wall portion 145 and the sixth wall portion 146 are arranged along the thickness direction of the second tube body 12, the seventh wall portion 147 and the eighth wall portion 148 are arranged along the width direction of the second tube body 12. The seventh wall portion 147 connects the fifth wall portion 145 and the sixth wall portion 146, and the eighth wall portion 148 connects the fifth wall portion 145 and the sixth wall portion 146. The fifth wall portion 145 is closer to the second wall 121 than the sixth wall portion 146. Along the thickness direction of the second tube body 12, the distance between the sixth wall portion 146 and the fourth wall 122 is a2, and the distance between the fifth wall portion 145 and the second wall 121 is b2, and a2 > b2. By arranging the second ribs 149, the contact area between the fluid in the second channel 125 and the second tube body 12 is increased, and the heat exchange effect of the flat tube 1 is improved.

[0020] In some embodiments, as shown in FIGS. 4 to 7, the first tube body 11 includes a fifth wall 113 and a sixth wall 114. Along the width direction of the first tube body 11, a plurality of first pore channels 115 are located between the fifth wall 113 and the sixth wall 114. The fifth wall 113 connects the third wall 111 and the first wall 112, and the sixth wall 114 connects the third wall 111 and the first wall 112. The second tube body 12 includes a seventh wall 123 and an eighth wall 124. Along the width direction of the second tube body 12, a plurality of second pore channels 125 are located between the seventh wall 123 and the eighth wall 124. The seventh wall 123 connects the second wall 121 and the fourth wall 122, and the eighth wall 124 connects the second wall 121 and the fourth wall 122. As shown in the drawings, the fifth wall 113, the sixth wall 114, the seventh wall 123, and the eighth wall 124 in this embodiment all include straight segments and arc segments. Of course, they may also include only straight segments or arc segments. As shown in FIGS. 4 and 6, along the width direction of the first tube body 11, the distance between the wall 13 forming the first pore channel 115 adjacent to the fifth wall 113 and the fifth wall 113 is defined as d1, and d1 > b1. Along the width direction of the second tube body 12, the distance between the wall 14 forming the second pore channel adjacent to the seventh wall 123 and the seventh wall 123 is defined as d3, and d3 > b2. As shown in FIGS. 5 and 7, the distance between the wall 13 forming the first pore channel adjacent to the sixth wall 114 and the sixth wall 114 is defined as d2, and d2 > b1. The distance between the wall 14 forming the second pore channel adjacent to the eighth wall 124 and the eighth wall 124 is defined as d4, and d4 > b2. The fifth wall 113, the sixth wall 114, the seventh wall 123, and the eighth wall 124 are all outer surfaces of the flat tube 1. By controlling the magnitudes of d1, d2, d3, and d4, the strength of the flat tube 1 is improved.

[0021] In some embodiments, as shown in FIGS. 5, 6, and 7, along the thickness direction of the tube body, the first pore channels 115 and the second pore channels 125 are provided to be aligned. By arranging the first tube body 11 and the second tube body 12 in a similar structure, the processing is facilitated. As shown in FIG. 4, along the thickness direction of the tube body, the first pore channels 115 and the second pore channels 125 are arranged offset from each other, thereby improving the compactness of the flat tube 1.

[0022] As shown in FIGS. 8 to 14, the heat exchange core 10 includes a first confluence member 2, a second confluence member 3, and a plurality of flat tubes 1. The flat tubes 1 are the above-mentioned flat tubes 1, and the structure of the flat tubes 1 will not be elaborated here redundantly. As shown in FIG. 8, the direction H is also the height direction of the heat exchange core 10. Along the length direction of the flat tube 1, the flat tube 1 includes a first end portion 110 connected to the first confluence member 2 and a second end portion 120 (see FIG. 1) connected to the second confluence member 3. Both the first confluence member 2 and the second confluence member 3 include at least one chamber. The first channel 115 and the second channel 125 of the flat tube 1 communicate with at least one chamber of the first confluence member 2 and also communicate with at least one chamber of the second confluence member 3. The heat exchange core 10 is provided with a first fluid passage. The first channel 115, the second channel 125, at least a part of the chambers of the first confluence member 2, and at least a part of the chambers of the second confluence member 3 are at least a part of the first fluid passage.

[0023] As shown in Fig. 8, a plurality of flat tubes 1 are arranged in two sets along the width direction of the heat exchange core 10, and each set includes a plurality of flat tubes 1 arranged along the height direction of the heat exchange core 10. The first end portion 110 of each flat tube 1 is connected to the first confluence member 2, and the second end portion 120 of each flat tube 1 is connected to the second confluence member 3. Specifically, as shown in Fig. 13, the first confluence member 2 includes five plate pieces, namely, one first plate piece 21, three second plate pieces 22, and one third plate piece 23. The three second plate pieces 22 are located between the first plate piece 21 and the third plate piece 23. The first plate piece 21 is provided with a plurality of first through holes 211 arranged along the height direction of the heat exchange core 10 and a plurality of second through holes 212 arranged along the height direction of the heat exchange core 10. The first through holes 211 and the second through holes 212 are arranged along the width direction of the heat exchange core 10. The plurality of first through holes 211 are used for inserting the first end portions 110 of one set of flat tubes 1, and the plurality of second through holes 212 are used for inserting the first end portions 110 of the other set of flat tubes 1. As shown in Fig. 1, the first end portion 110 of the flat tube 1 adopts a reduced diameter structure, so as to easily control the depth of insertion of the flat tube 1 into the first plate piece 21. The second plate piece 22 is provided with a plurality of first through holes 221, second through holes 222, and third through holes 223. The plurality of first through holes 221 and second through holes 222 of the second plate piece 22 are provided to correspond one by one to some of the first through holes 211 and second through holes 212 of the first plate piece 21. The third through hole 223 communicates the first through hole 211 and the second through hole 212 of the first plate piece 21. The third plate piece 23 is provided with a first passage 231, a second passage 232, a first hole 233, and a second hole 234. The first hole 233 communicates the first passage 231 and the plurality of first through holes 221 of the second plate piece 22, and the second hole 234 communicates the second passage 232 and the plurality of second through holes 222 of the second plate piece 22.As shown in FIG. 14, the second confluence member 3 includes five plate pieces, namely, one fourth plate piece 31, one fifth plate piece 32, two sixth plate pieces 33, and one seventh plate piece 34. The fourth plate piece 31 is a flat piece. The fifth plate piece 32 is provided with a plurality of fourth through holes 321 extending along the height direction of the heat exchange core 10. The sixth plate piece 33 is provided with a plurality of fifth through holes 331 arranged along the height direction of the heat exchange core 10 and a plurality of sixth through holes 332 arranged along the height direction of the heat exchange core 10. The fifth through holes 331 and the sixth through holes 332 are arranged along the width direction of the heat exchange core 10. The seventh plate piece 34 is provided with a plurality of seventh through holes 341 corresponding one by one to the fifth through holes 331 of the sixth plate piece 33 and a plurality of eighth through holes 342 corresponding one by one to the sixth through holes 332. The plurality of seventh through holes 341 are used for inserting the second ends 120 of one set of flat tubes 1, and the plurality of eighth through holes 342 are used for inserting the second ends 120 of the other set of flat tubes 1. As shown in FIG. 1, by adopting a reduced diameter structure for the second ends 120 of the flat tubes 1, the depth of insertion of the flat tubes 1 into the seventh plate piece 34 can be easily controlled. When the fluid flows into the first passage 231, it flows from the first hole 233 into the plurality of first through holes 221 of the second plate piece 22, then flows through the flat tube 1 and into the second confluence member 3. It flows from a part of the fifth through holes 331 of the sixth plate piece 33 into a part of the fourth through holes 321 of the fifth plate piece 32. The fluid flows downward along the fourth through holes 321 and then flows into another part of the first through holes 331 of the sixth plate piece 33. After flowing through the flat tube 1, it flows into the third through holes 223 of the second plate piece 22 of the first confluence member 2. The fluid moves laterally and then flows into the other set of flat tubes 1. After flowing through the flat tube 1, it flows into a part of the sixth through holes 332 of the sixth plate piece 33 of the second confluence member 3, and then flows upward through a part of the fourth through holes 321 of the fifth plate piece 32. Further, it flows into another part of the sixth through holes 332 of the sixth plate piece 33. After flowing through the flat tube 1, it flows into the second through holes 222 of the second plate piece 22 of the first confluence member 2, and then flows into the second passage 233 of the third plate piece 23 through the second hole 234 and then flows out of the heat exchange core 10. Of course, the fluid may flow in the reverse direction, or the flow path of the fluid may be changed by changing the through hole structure of each plate piece.

[0024] As shown in FIGS. 8 to 12, the heat exchange core 10 further includes a plurality of fin plates 4. The fin plates 4 are located between two adjacent flat tubes 1 and include a plurality of fin units arranged along the length direction of the flat tubes 1. The fin units include a top portion 41, a bottom portion 42, a first side portion 43, and a second side portion 44. The first side portion 43 connects the top portion 41 and the bottom portion 42, and the second side portion 44 connects the bottom portion 42 and the top portion 41 of the adjacent fin unit. As shown in FIG. 12, the top portion 41 is welded and fixed to the fourth wall 122 of the adjacent flat tube 1, and the bottom portion 42 is welded and fixed to the third wall 111 of the other adjacent flat tube 1. The first side portion 43 and the second side portion 44 are provided with notches 45. The distance between the first top portions 41 of adjacent fin units is denoted as λ, and the pitch between adjacent flat tubes 1 is denoted as h, where 0.8 < λ / h < 5 and h < 2.5 mm. By reducing the height of the fin plate 4, on the premise of ensuring that the height of the heat exchange core 10 remains unchanged, more flat tubes 1 are arranged to improve the heat exchange effect between the fluid in the flat tubes 1 and the flat tubes 1. The fin plate 4 controls the distance λ between the first top portions 41 of adjacent fin units to increase the heat exchange area of the fin plate 4.

[0025] As shown in FIGS. 15 to 18, the heat exchanger 100 includes a housing 5 and a heat exchange core 10. The heat exchange core 10 is the above-mentioned heat exchange core 10. The heat exchange core 10 is housed in the housing 5. The interior of the housing 5 is provided with a medium chamber 6. The housing 5 includes a first main body 51 and a second main body 52 that are sealed and fixed. The second housing 52 is provided with a first connecting pipe 521 and a second connecting pipe 522 that communicate with the medium chamber 6. The heat exchanger 100 is provided with a second fluid passage. The first fluid passage and the second fluid passage do not communicate with each other. The medium chamber 6 is at least a part of the second fluid passage. The fluid flows into the medium chamber 6 from the first connecting pipe 521, then flows through the fin plate 4, and flows out from the second connecting pipe 522, thereby performing heat exchange with the fluid in the first fluid passage of the heat exchange core 10. The first connecting pipe 521 and the second connecting pipe 522 are located on one side in the width direction of the heat exchanger 100. A plurality of fin units of the fin plate 4 are arranged along the length direction of the flat tube 1. Thereby, on the premise of reducing the pressure drop of the fluid flowing through the fin plate 4 and ensuring that the pressure drop is invariant, the distance between the first top portions 41 of adjacent fin units is reduced, the heat exchange area of the fin plate 4 is increased, and the heat exchange performance is improved.

[0026] Combining FIGS. 17 and 18, the first confluence member 2 includes a first cavity 24 and a second cavity 25. The housing 5 is provided with a first port 511 and a second port 512. The first port 511 and the second port 512 are specifically located on the first main body 51. Of course, they may also be located on the second main body 52. The first cavity 24 communicates with the first port 511, and the second cavity 25 communicates with the second port 512. In some specific embodiments, a connection block 7 is welded and fixed to the first main body 51. The connection block 7 is provided with a first flow path 71 communicating with the first port 511 and a second flow path 72 communicating with the second port 512. The fluid flows from the first flow path 71 into the first port 511, then further into the first cavity 24, flows through the flat tube 1, then into the second cavity 25, further into the second port 512 from the second cavity 25, and then flows out from the second flow path 72. Of course, the fluid may also flow in the reverse direction. As shown in FIG. 13, the first passage 231 of the third plate piece 23 may be used as the first cavity 24, and the second passage 232 may be used as the second cavity 25. Of course, the first confluence member 1 may have other structures. Also, the connection block 7 may not be provided, and the housing 5 may be fixed by arranging a connecting pipe.

[0027] In some embodiments, a part of the heat exchange core 10 may be arranged inside the housing 5. As shown in FIG. 8, the flat tube 1 and the fin plate 4 are arranged inside the housing 5, and at least a part of the first confluence member 2 and at least a part of the second confluence member 3 are arranged outside the housing 5. For example, one end of the housing 5 is sealed and fixed to the first confluence member 2, and the other end of the housing 5 is sealed and fixed to the second confluence member 3. Of course, specifically, there are multiple forms surrounded as the medium chamber 6, and the present application does not limit this.

[0028] Here, the above is a detailed introduction to the heat exchanger provided by the present application. This specification uses specific examples to describe the principle and embodiments of the present application. The above description of the embodiments is only for understanding the gist of the present application. For those skilled in the art, on the premise of not departing from the principle of the present application, some improvements and modifications may be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A flat tube (1) comprising a tube body, the tube body including at least a first tube body (11) and a second tube body (12), the first tube body (11) having a plurality of first pore channels (115) extending along the length direction of the tube body, the plurality of first pore channels (115) being arranged along the width direction of the first tube body (11), the second tube body (12) having a plurality of second pore channels (125) extending along the length direction of the tube body, the plurality of second pore channels (125) being arranged along the width direction of the second tube body (12), along the thickness direction of the first tube body (11), the first tube body (11) having a first wall (112), along the thickness direction of the second tube body (12), the second tube body (12) having a second wall (121), the first wall (112) of the first tube body (11) and the second wall (121) of the second tube body (12) being arranged opposite to each other and welded and fixed, characterized in that it is a flat tube (1).

2. The first tube body (11) includes a third wall (111), along the thickness direction of the first tube body (11), the first pore channel (115) is located between the first wall (112) and the third wall (111), the distance between the wall (13) forming the first pore channel and the third wall (111) is defined as a1, the distance between the wall (13) forming the first pore channel and the first wall (112) is defined as b1, along the width direction of the first tube body (11), the distance between two adjacent first pore channels (115) is defined as c1, and the same first pore channel (115) satisfies a1 > b1 and / or c1 < b1, characterized in that it is the flat tube (1) according to Claim 1.

3. The second tube body (12) includes a fourth wall (122), along the thickness direction of the second tube body (12), the second pore channel (125) is located between the second wall (121) and the fourth wall (122), the distance between the wall (14) forming the second pore channel and the fourth wall (122) is defined as a2, the distance between the wall (14) forming the second pore channel and the second wall (121) is defined as b2, along the width direction of the second tube body (12), the distance between two adjacent second pore channels (125) is defined as c2, and the same second pore channel (125) satisfies a2 > b2 and / or c2 < b2, characterized in that it is the flat tube (1) according to Claim 1 or 2.

4. The first tube body (11) includes a fifth wall (113) and a sixth wall (114). Along the width direction of the first tube body (11), a plurality of the first pore channels (115) are located between the fifth wall (113) and the sixth wall (114). The fifth wall (113) connects the third wall (111) and the first wall (112), and the sixth wall (114) connects the third wall (111) and the first wall (112). Along the width direction of the first tube body (11), the distance between the wall (13) forming the first pore channel adjacent to the fifth wall (113) and the fifth wall (113) is defined as d1, and the distance between the wall (13) forming the first pore channel adjacent to the sixth wall (114) and the sixth wall (114) is defined as d2. The flat tube (1) according to claim 2, characterized in that d1 > b1 and d2 > b1.

5. The second tube body (12) includes a seventh wall (123) and an eighth wall (124). Along the width direction of the second tube body (12), a plurality of the second pore channels (125) are located between the seventh wall (123) and the eighth wall (124). The seventh wall (123) connects the second wall (121) and the fourth wall (122), and the eighth wall (124) connects the second wall (121) and the fourth wall (122). Along the width direction of the second tube body (12), the distance between the wall (14) forming the second pore channel adjacent to the seventh wall (123) and the seventh wall (123) is defined as d3, and the distance between the wall (14) forming the second pore channel adjacent to the eighth wall (124) and the eighth wall (124) is defined as d4. The flat tube (1) according to claim 3, characterized in that d3 > b2 and d4 > b2.

6. The flat tube (1) according to any one of claims 1 to 5, wherein the first pore channel (115) and the second pore channel (125) are arranged offset along the thickness direction of the tube body.

7. The wall (13) forming the first hole passage includes a first straight wall portion (131) and a first arcuate wall portion (134). The first arcuate wall portion (134) protrudes toward the third wall (111). The first straight wall portion (131) is closer to the first wall (112) than the first arcuate wall portion (134). Along the thickness direction of the first tube body (11), the distance between the first straight wall portion (131) and the first wall (112) is smaller than the distance between the first arcuate wall portion (134) and the third wall (11). And / or, the wall (14) forming the second hole passage includes a second straight wall portion (141) and a second arcuate wall portion (144). The second arcuate wall portion (144) protrudes toward the fourth wall (122). The second straight wall portion (141) is closer to the second wall (121) than the second arcuate wall portion (144). Along the thickness direction of the second tube body (12), the distance between the second straight wall portion (141) and the second wall (122) is smaller than the distance between the second arcuate wall portion (144) and the fourth wall (122). The flat tube (1) according to any one of claims 1 to 5.

8. The wall (13) forming the first hole passage includes a first wall (135), a second wall (136), a third wall portion (137), and a fourth wall portion (138). The first wall (135) and the second wall (136) are arranged along the thickness direction of the first tube body (11). The third wall portion (137) and the fourth wall portion (138) are arranged along the width direction of the first tube body (11). The third wall portion (137) connects the first wall (135) and the second wall (136). The fourth wall portion (138) connects the first wall (135) and the second wall (136). The first wall (135) is closer to the third wall (111) than the second wall (136). Along the thickness direction of the first tube body (11), the distance between the first wall (135) and the third wall (111) is larger than the distance between the second wall (136) and the first wall (112). A first rib (139) protruding toward the second wall (136) is provided on the first wall (135). A first rib (139) protruding toward the first wall (135) is provided on the second wall (136). And / or, The wall (14) forming the second hole passage includes a fifth wall portion (145), a sixth wall portion (156), a seventh wall portion (147), and an eighth wall portion (148). The fifth wall portion (145) and the sixth wall portion (146) are arranged along the thickness direction of the second tube body (12). The seventh wall portion (147) and the eighth wall portion (148) are arranged along the width direction of the second tube body (12). The seventh wall portion (147) connects the fifth wall portion (145) and the sixth wall portion (146). The eighth wall portion (148) connects the fifth wall portion (145) and the sixth wall portion (146). The fifth wall portion (145) is closer to the second wall (121) than the sixth wall portion (146). Along the thickness direction of the second tube body (12), the distance between the fifth wall portion (145) and the second wall (121) is smaller than the distance between the sixth wall portion (146) and the fourth wall (122). The fifth wall portion (145) is provided with a second rib (149) protruding toward the sixth wall portion (146). The sixth wall portion (146) is provided with a second rib (149) protruding toward the fifth wall portion (145). The flat tube (1) according to any one of claims 1 to 5.

9. A heat exchange core (10) including a first confluence member (2), a second confluence member (3), and a plurality of flat tubes (1). The flat tube (1) is the flat tube (1) according to any one of claims 1 to 8. Along the length direction of the flat tube (1), the flat tube (1) includes a first end portion (110) connected to the first confluence member (2) and a second end portion (120) connected to the second confluence member (3). Both the first confluence member (2) and the second confluence member (3) include at least one chamber. The first hole passage (115) and the second hole passage (125) of the flat tube (1) communicate with at least one chamber of the first confluence member (2) and also communicate with at least one chamber of the second confluence member (3). The heat exchange core (10) is provided with a first fluid passage. The first hole passage (115), the second hole passage (125), at least a part of the chambers of the first confluence member (2), and at least a part of the chambers of the second confluence member (3) are at least a part of the first fluid passage. The heat exchange core (10).

10. It further includes a plurality of fin plates (4), the fin plates (4) are located between two adjacent flat tubes (1), and include a plurality of fin units arranged along the length direction of the flat tubes (1). Each fin unit includes a top portion (41) connected to the fourth wall (122) of one flat tube (1), a bottom portion (42) connected to the third wall (111) of the other flat tube (1), a first side portion (43) connecting the top portion (41) and the bottom portion (42), and a second side portion (44) connecting the bottom portion (42) and the top portion (41) of an adjacent fin unit. The first side portion (43) and the second side portion (44) are provided with notches (45). Let the distance between the top portions (41) of two adjacent fin units be λ, and the pitch between the adjacent flat tubes (1) be h. The heat exchange core (10) according to claim 9, characterized in that 0.8 < λ / h < 5.

11. A heat exchanger (100), comprising a housing (5) and a heat exchange core (10), the heat exchange core (10) being the heat exchange core (10) according to claim 9 or 10. The housing (5) is sealed and fixed to the first confluence member (2) and sealed and fixed to the second confluence member (3). The interior of the housing (5) is provided with a medium chamber (6). The heat exchanger (100) is provided with a second fluid passage, and the first fluid passage and the second fluid passage are not in communication. The medium chamber (6) is at least a part of the second fluid passage. A heat exchanger (100) characterized by this.

12. A heat exchanger (100), comprising a housing (5) and a heat exchange core (10) accommodated in the housing (5), the heat exchange core (10) being the heat exchange core (10) according to claim 9 or 10. The housing (5) includes a first main body (51) and a second main body (52) that are sealed and fixed. The first confluence member (2) includes a first cavity (24) and a second cavity (25). The housing (5) is provided with a first port (511) and a second port (512). The first cavity (24) communicates with the first port (511), and the second cavity (25) communicates with the second port (512). A heat exchanger (100) characterized by this.

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