CN211552541U - Heat exchanger - Google Patents

Abstract

The application discloses a heat exchanger, which comprises a first flow collecting piece, a second flow collecting piece and a heat exchange core body, wherein two ends of the first flow collecting piece and the second flow collecting piece are respectively connected with the first flow collecting piece and the second flow collecting piece; the first collecting piece comprises a first channel, a second channel and a third channel, the first channel is located on one side of the third channel, the second channel is located on the other side of the third channel, the first channel and the second channel are communicated with the third channel, and the inner cavity of the heat exchange tube is communicated with the third channel, at least one first channel and at least one second channel. The heat exchanger of the application introduces the first fluid into the third channel along the length direction of the heat exchange tube through the second hole, then distributes the first fluid to the first channel and the second channel respectively along the width direction of the heat exchange tube through the third channel, and then the first fluid flows into the heat exchange tube communicated with the first channel, the second channel and the third channel again, so that the first fluid can be distributed to the heat exchange tube more uniformly in the flow collecting piece, and the heat exchange effect of the heat exchanger can be improved.

Description

Heat exchanger

Technical Field

The application relates to the technical field of heat exchange, in particular to a heat exchanger.

Background

Heat exchangers, also known as heat exchangers, are widely used in heat exchange systems (e.g., air conditioning systems). The heat exchanger can be used for heat exchange between a heat exchange medium and outside air, and also can be used for heat exchange between two heat exchange media. Whether the heat exchange medium in the current collecting piece can be uniformly distributed to the heat exchange tube or not influences the heat exchange effect of the heat exchanger.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned problem that prior art exists, the application provides a better heat exchanger of heat transfer effect.

In order to achieve the purpose, the following technical scheme is adopted in the application: a heat exchanger, comprising: the first current collecting piece, the second current collecting piece and the heat exchange core body; the heat exchange core body comprises a plurality of layers of heat exchange tubes arranged in parallel, each heat exchange tube comprises a first port and a second port, the first port is connected to the first current collecting piece, and the second port is connected to the second current collecting piece; the first flow collecting piece comprises a first plate and a second plate which are arranged in parallel, the second plate is attached to one side, away from the heat exchange tube, of the first plate, the first plate comprises a first body part, the first body part comprises a plurality of first holes which are arranged in parallel, and the first port part is inserted into the first holes; the second plate comprises a plurality of first ribs, a plurality of second ribs and a second hole penetrating through the second plate along the length direction of the heat exchange tube, the extending direction of the first ribs and the extending direction of the second ribs are approximately parallel to the width direction of the heat exchange tube, the second plate further comprises at least one third channel extending along the arrangement direction of the heat exchange tube, the first ribs and the second ribs are oppositely arranged along the width direction of the heat exchange tube and are respectively positioned at two sides of the third channel, the second hole is communicated with at least one third channel, the first ribs are mutually arranged in parallel, a first channel is formed between every two adjacent first ribs, the second ribs are mutually arranged in parallel, a second channel is formed between every two adjacent second ribs, the first channel and the second channel are both communicated with the third channel, and the inner cavity of the heat exchange tube is communicated with the third channel, At least one said first channel and at least one said second channel.

The heat exchanger of the application introduces the first fluid into the third channel along the length direction of the heat exchange tube through the second hole, then distributes the first fluid to the first channel and the second channel respectively along the width direction of the heat exchange tube through the third channel, and then the first fluid flows into the heat exchange tube communicated with the first channel, the second channel and the third channel again, so that the first fluid can be distributed to the heat exchange tube more uniformly in the flow collecting piece, and the heat exchange effect of the heat exchanger can be improved.

Optionally, the second board includes a first sub-board and a second sub-board which are arranged in parallel; the first rib and the second rib are located on the first sub-board, the first channel, the second channel and the third channel are formed in the first sub-board, the second hole is located in the second sub-board, the second hole penetrates through the second sub-board along the length direction of the heat exchange tube, and the second sub-board is attached to one side, away from the first board, of the first sub-board.

Optionally, the second current collector includes a third plate and a fourth plate that are arranged in parallel, the fourth plate is attached to one side of the third plate away from the heat exchange tube, the third plate includes a second body portion, the second body portion includes a plurality of third holes that are arranged in parallel, and the second port portion is inserted into the third holes; the fourth plate comprises a plurality of third ribs and a plurality of fourth ribs, the extending directions of the third ribs and the fourth ribs are approximately parallel to the width direction of the heat exchange tube, the fourth plate further comprises at least one sixth channel extending along the arrangement direction of the heat exchange tube, the third ribs and the fourth ribs are oppositely arranged along the width direction of the heat exchange tube and are respectively located on two sides of the sixth channel, the third ribs are mutually arranged in parallel and are adjacent to each other, a fourth channel is formed between every two third ribs, the fourth ribs are mutually arranged in parallel and are adjacent to each other, a fifth channel is formed between every two fourth ribs, the fourth channel and the fifth channel are communicated with the sixth channel, and the inner cavity of the heat exchange tube is communicated with the sixth channel, at least one fourth channel and at least one fifth channel.

Optionally, the fourth plate further includes a fourth hole penetrating through the fourth plate along the length direction of the heat exchange tube, the fourth hole is communicated with all the sixth channels, and the second hole is communicated with all the third channels; the heat exchanger further comprises a first tubing and a second tubing, the first tubing comprises a first end cover for plugging one end of the first tubing, the second tubing comprises a second end cover for plugging one end of the second tubing, the first tubing comprises a first planar wall which is arranged on one side, away from the first plate, of the second plate in a fit mode, the second tubing comprises a second planar wall which is arranged on one side, away from the third plate, of the fourth plate in a fit mode, the first planar wall is provided with a first communication hole, the first communication hole is communicated with the third channel through the second hole, the second planar wall is provided with a second communication hole, the second communication hole is communicated with the sixth channel through the fourth hole, and the inner cavity of the first tubing is communicated with the inner cavity of the second tubing through the inner cavity of the heat exchange tube.

Optionally, the number of the third channels is at least two, the arrangement direction of the at least two third channels is parallel to the arrangement direction of the heat exchange tube, the second plate further includes a fifth rib located between two adjacent third channels and spaced from the two adjacent third channels, the fifth rib extends along the width direction of the heat exchange tube, the first channel is formed between the fifth rib and the first rib, and the second channel is formed between the fifth rib and the second rib; along the arrangement direction of the heat exchange tubes, the first channels positioned on the two sides of the fifth ribs are arranged at intervals, and the second channels positioned on the two sides of the fifth ribs are arranged at intervals; the second hole is communicated with the third channel positioned on one side of the fifth rib; the first channel, the second channel and the third channel which are positioned on one side of the fifth rib are communicated with the first channel, the second channel and the third channel which are positioned on the other side of the fifth rib through the heat exchange tube and the second current collecting piece.

Optionally, the second plate further includes a fifth hole penetrating through the second plate along the length direction of the heat exchange tube, the fifth hole is communicated with at least one third channel, and the second hole and the fifth hole are respectively located at two sides of the fifth rib along the arrangement direction of the heat exchange tube; the heat exchanger further comprises a first distribution pipe and a second distribution pipe, wherein the first distribution pipe comprises a first end cover for plugging one end of the first distribution pipe, the second distribution pipe comprises a second end cover for plugging one end of the second distribution pipe, the first distribution pipe comprises a first plane wall which is attached to one side, away from the first plate, of the second plate, the second distribution pipe comprises a second plane wall which is attached to one side, away from the first plate, of the second plate, the first plane wall is provided with a first communication hole, the second plane wall is provided with a second communication hole, the first communication hole is communicated with at least one third channel through the second hole, and the second communication hole is communicated with at least one third channel through the fifth hole; the inner cavity of the first distribution pipe is communicated with the inner cavity of the second distribution pipe through the inner cavity of the heat exchange pipe and the second collecting piece.

Optionally, at least one of the first communication hole and the second communication hole is provided, and the extending direction of the first communication hole and the second communication hole is substantially parallel to the extending direction of the third channel; when the number of the first communicating holes and the second communicating holes is two or more, the arrangement direction of the first communicating holes and the second communicating holes is approximately parallel to the extension direction of the third channel.

Optionally, the first pipe further includes a first extending portion, the first extending portion is formed by extending an edge portion of the first communication hole toward the second plate, and the first extending portion is inserted into the second hole; at least one part of the edge part of the first communication hole extends to form the first extension part; the second pipe further comprises a second extending portion, the second extending portion is arranged at the edge of at least one part of the second communication hole, the second extending portion is formed by extending the edge of the second communication hole from the second pipe to the second plate, and the second extending portion is inserted into the fifth hole.

Optionally, the first pipe and the second plate are integrally formed, and the second pipe and the fourth plate are integrally formed; or both the first pipe and the second pipe are integrally formed with the second plate.

Optionally, the heat exchanger further includes a shell, the shell includes a first opening and a second opening respectively communicated with the inner cavity of the shell, the first opening is arranged close to the first collecting piece relative to the second opening, and the second opening is arranged close to the second collecting piece relative to the first opening; one end of the shell is hermetically connected with the first current collecting piece, the other end of the shell is hermetically connected with the second current collecting piece, and the main body parts of all the heat exchange tubes are accommodated in the inner cavity of the shell; the first plate further comprises a third extending portion extending towards the shell direction, the third plate further comprises a fourth extending portion extending towards the shell direction, and the third extending portion and the fourth extending portion are respectively fixedly connected with the shell.

Optionally, the first pipe further includes a first extending portion, the first extending portion is formed by extending an edge portion of the first communication hole toward the second plate, and the first extending portion is inserted into the second hole; at least one part of the edge part of the first communication hole extends to form the first extension part; the second pipe further comprises a second extending portion, the second extending portion is arranged on the edge portion of at least one part of the second communication hole, the second extending portion is formed by extending the edge portion surrounding the second communication hole from the second pipe to the fourth plate direction, and the second extending portion is inserted into the fourth hole.

Drawings

FIG. 1 is a schematic structural view of an embodiment of a heat exchanger of the present application;

FIG. 2 is an exploded view of an embodiment of the heat exchanger of the present application;

fig. 3 is a schematic structural view of the second piping shown in fig. 2;

FIG. 4 is a schematic structural view of another embodiment of the first piping and the second sub-plate shown in FIG. 2;

fig. 5 is a schematic view of an exploded structure of the first and second current collectors shown in fig. 2;

FIG. 6 is a front schematic view of the first daughter board shown in FIG. 5;

FIG. 7 is a front schematic view of the third daughter board shown in FIG. 5;

FIG. 8 is a schematic cross-sectional view of the housing and partial heat exchange tube mating arrangement shown in FIG. 2;

FIG. 9 is a schematic cross-sectional view of the heat exchanger shown in FIG. 2, wherein the heat exchange core shows a portion of the heat exchange tubes;

FIG. 10 is an enlarged partial schematic view of FIG. 9 showing A;

FIG. 11 is a partial enlarged schematic view of FIG. 9 showing B;

fig. 12 is a schematic cross-sectional view of another embodiment of the heat exchange core of the heat exchanger of the present application, in which only the first position-limiting portion is provided, in which the heat exchange core is engaged with the first position-limiting portion and the second position-limiting portion;

fig. 13 is a schematic cross-sectional view of another embodiment of the heat exchange core of the heat exchanger of the present application in cooperation with a first position-limiting portion and a second position-limiting portion, wherein only the second position-limiting portion is provided;

fig. 14 is a schematic cross-sectional view of another embodiment of a heat exchange core of a heat exchanger of the present application in cooperation with a first limiting portion and a second limiting portion, wherein a portion of the heat exchange tubes are only in cooperation with the first limiting portion and a portion of the heat exchange tubes are only in cooperation with the second limiting portion;

FIG. 15 is another cross-sectional schematic view of the heat exchanger shown in FIG. 2;

FIG. 16 is an exploded view of the connector shown in FIG. 2;

FIG. 17 is a schematic cross-sectional view of the heat exchange core of the heat exchanger of FIG. 2 further including a heat exchange element;

FIG. 18 is a cross-sectional schematic view of another embodiment of the first and second limiting portions of the heat exchanger shown in FIG. 2;

FIG. 19 is a schematic structural view of another embodiment of a heat exchanger of the present application;

FIG. 20 is an exploded view of another embodiment of the heat exchanger of the present application;

fig. 21 is an exploded view of the first and second headers shown in fig. 20;

FIG. 22 is a front schematic view of the first daughter board of FIG. 21;

fig. 23 is a schematic front view of fig. 21 showing a third sub-board.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used in this application and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.

It should be understood that the terms "first," "second," and the like as used in the description and in the claims, do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. Similarly, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one; "plurality" means two or more than two. Unless otherwise indicated, "front", "rear", "lower" and/or "upper" and the like are for convenience of description and are not limited to one position or one spatial orientation. The word "comprising" or "comprises", and the like, means that the element or item listed as preceding "comprising" or "includes" covers the element or item listed as following "comprising" or "includes" and its equivalents, and does not exclude other elements or items.

The heat exchanger according to the exemplary embodiment of the present application will be described in detail below with reference to the accompanying drawings. The features of the following examples and embodiments can be supplemented or combined with each other without conflict.

According to one embodiment of the heat exchanger of the present application, as shown in fig. 1 and 2, the heat exchanger comprises a first current collector 1, a second current collector 2, a heat exchange core 3 and a shell 4. The shell 4 is arranged around at least part of the heat exchange core 3, one end of the heat exchange core 3 is hermetically connected with the first current collecting piece 1, the other end of the heat exchange core is hermetically connected with the second current collecting piece 2, and a passage for flowing the first fluid is formed among the first current collecting piece 1, the heat exchange core 3 and the second current collecting piece 2. One end of the shell 4 is hermetically connected with the first flow collecting piece 1, the other end of the shell is hermetically connected with the second flow collecting piece 2, the first flow collecting piece 1, the second flow collecting piece 2 and the shell 4 jointly act to form a relatively closed cavity, and a passage for flowing of a second fluid is formed in the cavity.

The heat exchange core body 3 comprises a plurality of layers of heat exchange tubes 31 arranged side by side, optionally, the heat exchange tubes are flat tubes, each layer of heat exchange tube 31 comprises one flat tube, each heat exchange tube 31 comprises a first port portion 311, a second port portion 312 and a main body portion 313, and the main body portion 313 is connected between the first port portion 311 and the second port portion 312. In the present embodiment, the width of the first port 311 is substantially equal to the width of the second port 312, and the width of the body 313 is greater than the width of the first port 311 and greater than the width of the second port 312. The first port portion 311 of each heat exchange tube 31 is plugged to the first current collector 1, the second port portion 312 is plugged to the second current collector 2, and the body portion 313 is accommodated in the inner cavity of the housing 4. The inner cavity of the heat exchange tube 31 is communicated with the inner cavity of the first collecting piece 1 and the inner cavity of the second collecting piece 2.

The first collector 1 includes a first plate 11 and a second plate 12, the second plate 12 includes a first sub-plate 121 and a second sub-plate 122, and the first plate 11, the first sub-plate 121, and the second sub-plate 122 are arranged in parallel and are each substantially plate-shaped. The housing 4 is hermetically connected to the first board 11, the first sub-board 121 is attached to one side of the first board 11 away from the housing 4, and the second sub-board 122 is attached to one side of the first sub-board 121 away from the first board 11.

As shown in fig. 5, the first plate 11 includes a first body 111, the first body 111 has a plurality of first holes 1111 arranged in parallel, the first holes 1111 penetrate the first body 111, the first port 311 is inserted into the first holes 1111, and an end surface of the body 313 near one end of the first port 311 abuts against the first body 111.

With regard to the first port portion 311, the second port portion 312 and the body portion 313 in the present embodiment, it is to be understood that the heat exchange tube 31 is divided into three portions along the length direction of the heat exchange tube 31, the heat exchange tube 31 being a relatively small width portion located at both ends of the heat exchange tube 31 and the heat exchange tube 31 being a relatively large width portion located in the middle of the heat exchange tube 31, and the first port portion 311, the second port portion 312 and the body portion 313 each have a certain length. In the present embodiment, a portion of the heat exchange tube 31 having a relatively small width near the first header 1 is a first port portion 311, a portion of the heat exchange tube 31 having a relatively small width near the second header 2 is a second port portion 312, a portion of the heat exchange tube 31 having a relatively large width between the first port portion 311 and the second port portion 312 is a body portion 313, and the first port portion 311, the second port portion 312 and an inner cavity of the body portion 313 communicate with each other.

In the present embodiment, since the widths of the body portion 313 are both greater than the widths of the first port portion 311 and the second port portion 312, the end surface of one end of the body portion 313 close to the first port portion 311 abuts against the first collecting member 1, and the end surface of one end of the body portion 313 close to the second port portion 312 abuts against the second collecting member 2, so that the heat exchange tube 31 is limited between the first collecting member 1 and the second collecting member 2. The depth of insertion of the heat exchange tube 31 into the first and second collectors 1 and 2 can be controlled by setting the lengths of the first and second port parts 311 and 312. In other embodiments, the widths of the body portion 313, the first port portion 311, and the second port portion 312 may be the same, and then, a position limiting portion is provided in the first collecting member 1 and the second collecting member 2 to achieve a position limitation between the heat exchange tube 31 and the first collecting member 1 and the second collecting member 2, thereby controlling the depth of insertion of the heat exchange tube 31 into the first collecting member 1 and the second collecting member 2.

In the present embodiment, the cross-sectional shapes of the first port portion 311, the second port portion 312 and the main body portion 313 are all substantially waist-shaped. Since the first port 311 is inserted into the first hole 1111 and the shape and size of the first hole 1111 substantially match the shape and size of the first port 311, the first hole 1111 is also substantially kidney-shaped and the plurality of first holes 1111 have the same shape and size. In other embodiments, the cross-sectional shapes of the first port portion 311, the second port portion 312 and the main body portion 313 may also be rectangular, irregular, and the like; the cross-sectional shapes of the first port portion 311, the second port portion 312, and the body portion 313 may be different; the shape of the first hole 1111 may not coincide with the shape of the first port portion 311; the shape and size of the first holes 1111 may be the same or different, as long as the heat exchange tube 31 is connected to the first plate 11, and the flow of the first fluid is not affected and the first fluid does not leak, which is not limited in the present application. The shape and size of the first port 311, the second port 312, the body 313 and the second hole 1221 can be designed and matched according to actual requirements during use.

In this embodiment, the first plate 11 further includes third extending portions 112 extending toward the housing 4, as shown in fig. 1, 2 and 5, the third extending portions 112 are formed by extending the peripheral edge portions of the four first body portions 111 toward the housing 4, the third extending portions 112 wrap the end portion of the housing 4, and the inner side wall of the third extending portions 112 is attached to the outer side wall of the housing 4. The end surface of the case 4 near the first current collecting member 1 is connected to the first body portion 111, and is brazed so as to achieve a sealed connection between the case 4 and the first current collecting member 1. In other embodiments, the third extending portion 112 may be formed by extending one, two or three of the four peripheral edge portions of the first body portion 111, and the shape of the third extending portion 112 may be a long strip shape, a zigzag shape, a wavy shape, a special shape, and so on, as long as the connection between the first plate 11 and the case 4 can be achieved without affecting the sealing connection of the case 4 to the first current collector 1, which is not limited in this application. In addition, in other embodiments, the third extending portion 112 may also be inserted into the end portion of the housing 4, and an outer side wall of the third extending portion 112 is attached to an inner side wall of the housing 4.

As shown in fig. 5 and 6, the first sub-board 121 is composed of a solid portion surrounded on the periphery and a hollow portion surrounded by the solid portion, the first sub-board 121 is provided with a plurality of sets of first ribs 1211 and second ribs 1212, the first ribs 1211 and the second ribs 1212 are both disposed in the hollow portion and connected to the solid portion, and the first ribs 1211 and the second ribs 1212 are both formed by extending the solid portion toward the hollow portion. The first bead 1211 and the second bead 1212 extend in a direction substantially parallel to the width direction of the heat exchange tube 31, and the first bead 1211 and the second bead 1212 are axially symmetrically arranged. The first ribs 1211 and the second ribs 1212 are both substantially elongated, and a distance is provided between an end surface of each set of the first ribs 1211 and an end surface of the second rib 1212 that are disposed opposite to each other. The hollow portion of the first sub-plate 121 is formed with a third channel 1215 extending along the arrangement direction of the heat exchange tube 31, the first ribs 1211 and the second ribs 1212 are oppositely arranged along the width direction of the heat exchange tube 31 and are respectively located at two sides of the third channel 1215, the plurality of first ribs 1211 are arranged in parallel, a first channel 1213 is formed between two adjacent first ribs 1211, a first channel 1213 is formed between the first ribs 1211 and the solid portion, and a second channel 1214 is formed between two adjacent second ribs 1212, and the plurality of second ribs 1212 are arranged in parallel. The second ribs 1212 and the solid portions also form second channels 1214, all the first channels 1213 and all the second channels 1214 are communicated with a third channel 1215, the extending direction of the third channel 1215 is perpendicular to the extending direction of the first channels 1213 and the extending direction of the second channels 1214, and the first channels 1213 and the second channels 1214 are respectively positioned at two sides of the third channel 1215. In other embodiments, the first ribs 1211 and the second ribs 1212 may have other shapes, for example, the end surfaces of the first ribs 1211 opposite to the second ribs 1212 may have an arc shape, which may facilitate the smoothness of the flow of the first fluid from the third channel 1215 to the first channel 1213 and the second channel 1214; for example, the end surfaces of two adjacent first ribs 1211 facing each other may be serrated, and turbulence may be formed in the first channel 1213 or the second channel 1214.

In the present embodiment, the length of the first port 311 of the heat exchange tube 31 is greater than or equal to the thickness of the first body 111, but less than the sum of the thicknesses of the first plate 11 and the first sub-plate 121, and when the first port 311 is plugged into the first current collector 1, the end surface of the heat exchange tube 31 passes through the first plate 11 but does not pass through the first sub-plate 121, that is, the end of the first port 311 is accommodated in the space formed by the first channel 1213, the second channel 1214 and the third channel 1215. The first fluid in the present application is distributed to the first channel 1213 and the second channel 1214 through the third channel 1215, and then flows into the inner cavity of the heat exchange tube 31, and the structural design of the first sub-plate 121 can realize the primary distribution of the first fluid, so that the first fluid can be distributed to the inner cavity of each heat exchange tube 31 more uniformly, thereby being beneficial to improving the heat exchange effect of the heat exchanger.

The second sub-plate 122 includes second holes 1221 penetrating the second sub-plate 122 in the length direction of the heat exchange tube 31, the second holes 1221 communicating with the third passages 1215. The second hole 1221 is located between the first bead 1211 and the second bead 1212 in the width direction of the heat exchange tube 31. As shown in fig. 5, the number of the second holes 1221 is plural, the second holes 1221 are substantially kidney-shaped, the extending direction and the arrangement direction of the second holes 1221 are substantially parallel to the arrangement direction of the heat exchange tubes 31, centers of the plural second holes 1221 are equidistantly linearly arranged at intervals in the central axis of the second sub-plate 122, and projections of all the second holes 1221 on the first sub-plate 121 fall into the third passage 1215. In this embodiment, the outer contours of the first sub-plate 121 and the second sub-plate 122 are substantially the same, that is, the third channel 1215 is also disposed on the central axis of the first sub-plate 121, the third channel 1215 is disposed in the middle of the first sub-plate 121, and the first channel 1213 and the second channel 1214 are axially symmetrically distributed with the central axis of the first sub-plate 121 as the central axis, so that when the first fluid is distributed from the third channel 1215 to the first channel 1213 and the second channel 1214, the flow rates and the flow rates in the first channel 1213 and the second channel 1214 are substantially the same, which is favorable for uniform distribution of the first fluid in the first current collector 1. The center of the second hole 1221 may be understood as the center point of the cross-sectional shape, such as the center of a circle, the intersection of the major axis and the minor axis of an ellipse, the intersection of three perpendicular lines of a triangle, etc.

In this embodiment, the plurality of second holes 1221 are provided, the first fluid flows into the third channel 1215 from the plurality of second holes 1221, respectively, to achieve first distribution of the first fluid, and then is divided from the third channel 1215 to the first channel 1213 and the second channel 1214, to achieve second distribution of the first fluid, and then the first fluid flows into the inner cavity of the heat exchange tube 31, after the first fluid is distributed twice, the first fluid can be distributed to the inner cavity of each heat exchange tube 31 more uniformly, and the heat exchange effect of the heat exchanger can be further improved. And the second hole 1221 penetrates the second sub-plate 122 along the length direction of the heat exchange tube 31, the first channel 1213 and the second channel 1214 are respectively located at both sides of the third channel 1215 along the width direction of the heat exchange tube 31, and the second hole 1221 communicates with the third channel 1215. Referring to fig. 2, the first fluid flows into the third channel 1215 of the first manifold 1 in the up-down direction and is distributed to the first channel 1213 and the second channel 1214 in the left-right direction, respectively, so that the distribution of the first fluid is more uniform.

In other embodiments, only one second hole 1221 may be provided, and one second hole 1221 is extended along the arrangement direction of the heat exchange tubes 31 and is communicated with the third passage 1215; or two second holes 1221 may be provided in the arrangement direction of the heat exchange tubes 31, each of the second holes 1221 communicating with the third passage 1215. It should be understood that the centers of the at least two second holes 1221 may be uniformly distributed at equal intervals, or may be uniformly distributed at unequal intervals; the centers of the at least two second holes 1221 may or may not be linearly arranged; when the holes are linearly distributed, a straight line formed by the centers of the at least two second holes 1221 may or may not coincide with the central axis of the second sub-board 122; the third channel 1215 may not be disposed on the central axis of the first sub-plate 121, that is, the first rib 1211 and the second rib 1212 are not axially symmetrically distributed, as long as the flow of the first fluid is not affected, which is not limited in the present application.

In the present embodiment, the plurality of second holes 1221 are waist-shaped with uniform shape and size. In other embodiments, the second hole 1221 may also be circular, rectangular, or in other shapes such as irregular shape; the second holes 1221 may have the same shape and size or may not have the same size, as long as the flow of the first fluid is not affected, and the present application is not limited thereto. The specific distribution and shape and size of the second holes 1221, the third channels 1215, the first ribs 1211 and the second ribs 1212 can be designed and matched according to actual requirements during use.

The first plate 11, the first sub-plate 121 and the second sub-plate 122 are stacked and brazed to form the first current collector 1, the first channel 1213, the second channel 1214 and the third channel 1215 are all located inside the first current collector 1, the first channel 1213, the second channel 1214 and the third channel 1215 together form an inner cavity of the first current collector 1, and an inner cavity of the heat exchange tube 31 is communicated with the inner cavity of the first current collector 1. The first collecting piece 1 is formed by stacking plates and then brazing, so that the heat exchanger using the first collecting piece 1 has better compressive strength and can be suitable for a heat exchange system operating at high pressure.

As shown in fig. 1 and 2, the second collector 2 includes a third plate 21 and a fourth plate 22, the fourth plate 22 includes a third sub-plate 221 and a fourth sub-plate 222, the third plate 21, the third sub-plate 221 and the fourth sub-plate 222 are arranged in parallel and are each substantially plate-shaped, the housing 4 is hermetically connected to the third plate 21, the third sub-plate 221 is attached to the third plate 21 on a side away from the housing 4, and the fourth sub-plate 222 is attached to the third sub-plate 221 on a side away from the third plate 21.

In the present exemplary embodiment, the first collector 1 serves for the inflow of the first fluid into the heat exchanger, and the second collector 2 serves for the outflow of the first fluid out of the heat exchanger. The third plate 21 has substantially the same structure as the first plate 11, the first sub-plate 121 has substantially the same structure as the pair of third sub-plates 221, and the second sub-plate 122 has substantially the same structure as the fourth sub-plate 222; the fitting relationship among the third plate 21, the third sub-plate 221, and the fourth sub-plate 222 is also substantially the same as the fitting relationship among the first plate 11, the first sub-plate 121, and the second sub-plate 122; the fitting relationship between the third plate 21, the third sub-plate 221 and the fourth sub-plate 222 and the heat exchange tube 31 and the housing 4 is substantially the same as the fitting relationship between the first plate 11, the first sub-plate 121 and the second sub-plate 122 and the heat exchange tube 31 and the housing 4, and the functions of the third plate 21, the third sub-plate 221 and the fourth sub-plate 222 can be correspondingly described with reference to the first plate 11, the first sub-plate 121 and the second sub-plate 122. In other embodiments, other structural designs can be used in combination according to actual requirements during use.

As shown in fig. 5, the third plate 21 includes a second body portion 211, the second body portion 211 has a plurality of third holes 2111 arranged in parallel, the third holes 2111 penetrate through the second body portion 211, and the second port portion 312 is inserted into the third holes 2111.

In the present embodiment, the shape and size of the third hole 2111 substantially match the shape and size of the second port portion 312, so the shape and size of the third hole 2111 are also substantially kidney-shaped, and the shape and size of the plurality of third holes 2111 are the same. In other embodiments, the shape of the third hole 2111 may also not conform to the shape of the second port portion 312; the plurality of third holes 2111 may have the same or different shapes and sizes, as long as the heat exchange tube 31 is connected to the third plate 21, the flow of the first fluid is not affected and the first fluid does not leak, which is not limited in the present application. The third hole 2111 is designed to have a size and shape, which can be designed and matched in various ways according to actual requirements in use.

The third plate 21 further includes a fourth extending portion 212 extending toward the housing 4, as shown in fig. 1, 2 and 5, the fourth extending portion 212 is formed by extending the peripheral edge portions of the four of the second body portion 211 toward the housing 4, the end portion of the fourth extending portion 212 wrapping the housing 4 is attached to the outer side wall of the housing 4, the end surface of the housing 4 close to the second current collecting member 2 is connected to the second body portion 211, and after brazing, the housing 4 and the first current collecting member 1 are hermetically connected. In other embodiments, the fourth extension 212 may be formed by extending one, two or three of the four peripheral edge portions of the second body portion 211, and the shape of the fourth extension 212 may be a long strip shape, a zigzag shape, a wavy shape, a special shape, etc., as long as it is possible to connect the third plate 21 and the housing 4 without affecting the sealing connection of the housing 4 to the second current collector 2, which is not limited in this application. In addition, in other embodiments, the fourth extending portion 212 may also be inserted into the end portion of the housing 4, and an outer side wall of the fourth extending portion 212 is attached to an inner side wall of the housing 4.

As shown in fig. 5 and 7, the third sub-board 221 includes a solid portion surrounding the periphery and a hollow portion surrounded by the solid portion, the third sub-board 221 includes a plurality of sets of third ribs 2211 and fourth ribs 2212, the third ribs 2211 and the fourth ribs 2212 are both disposed in the hollow portion and connected to the solid portion, the third ribs 2211 and the fourth ribs 2212 are both formed by extending the solid portion toward the hollow portion, the extending directions of the third ribs 2211 and the fourth ribs 2212 are substantially parallel to the width direction of the heat exchange tube 31, and the third ribs 2211 and the fourth ribs 2212 are axially symmetrically distributed. The third and fourth ribs 2211 and 2212 are both substantially long, and a certain distance is provided between the end surface of each set of the third and fourth ribs 2211 and 2212 which are oppositely arranged. The hollow portion of the second sub-plate 122 is formed with a sixth channel 2215 extending along the arrangement direction of the heat exchange tube 31, the third ribs 2211 and the fourth ribs 2212 are oppositely arranged along the width direction of the heat exchange tube 31 and are respectively located at two sides of the sixth channel 2215, the third ribs 2211 are arranged in parallel, a fourth channel 2213 is formed between two adjacent third ribs 2211, a fourth channel 2213 is also formed between the third ribs 2211 and the solid portion, the fourth ribs 2212 are arranged in parallel, a fifth channel 2214 is formed between two adjacent fourth ribs 2212, a fifth channel 2214 is also formed between the fourth ribs 2212 and the solid portion, all the fourth channels 2213 and all the fifth channels 2214 are communicated with the sixth channel 2215, the extending direction of the sixth channel 2215 is perpendicular to the extending direction of the fourth channels 2213 and the extending direction of the fifth channels 2214, and the fourth channels 2213 and the fifth channels 2214 are respectively located at two sides of the sixth channel 2215. In other embodiments, the third and fourth ribs 2211 and 2212 may have other shapes, for example, the end surfaces of the third and fourth ribs 2211 and 2212 opposite to each other may be arc-shaped, which may facilitate the smoothness of the flow of the first fluid from the fourth and fifth passages 2213 and 2214 to the sixth passage 2215; for example, the end surfaces of two adjacent third ribs 2211, which are oppositely arranged, may be serrated, and may form turbulent flow in the fourth passage 2213 or the fifth passage 2214.

In this embodiment, the length of the second port portion 312 of the heat exchange tube 31 is greater than the thickness of the third plate 21 but less than the sum of the thicknesses of the third plate 21 and the third sub-plate 221, and when the second port portion 312 is plugged into the second collector 2, the end surface of the heat exchange tube 31 passes through the third plate 21 but does not pass through the third sub-plate 221, that is, the end portion of the second port portion 312 is accommodated in the space formed by the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215. The first fluid in the present application flows into the fourth channel 2213, the fifth channel 2214 and the sixth channel 2215 from the inner cavity of the heat exchange tube 31, and then the first fluid in the fourth channel 2213 and the fifth channel 2214 flows together to the sixth channel 2215, and the structural design of the third sub-plate 221 can realize that the first fluid flows together to the sixth channel 2215 and then flows out of the first current collector 1.

The fourth sub-plate 222 includes a fourth hole 2221 penetrating the fourth sub-plate 222 in the length direction of the heat exchange pipe 31, and the fourth hole 2221 communicates with the sixth passage 2215. The fourth hole 2221 is located between the third and fourth ribs 2211 and 2212 in the width direction of the heat exchange tube 31. As shown in fig. 5, the number of the fourth holes 2221 is plural, the fourth holes 2221 are substantially waist-shaped, the extending direction and the arrangement direction of the fourth holes 2221 are substantially parallel to the arrangement direction of the heat exchange tubes 31, the centers of the plural fourth holes 2221 are equally spaced and linearly distributed on the central axis of the fourth sub-plate 222, and the projections of all the fourth holes 2221 on the third sub-plate 221 fall into the sixth channels 2215. In this embodiment, the outer contours of the third sub-plate 221 and the fourth sub-plate 222 are substantially the same, that is, the sixth passage 2215 is also disposed on the central axis of the third sub-plate 221, the sixth passage 2215 is disposed in the middle of the third sub-plate 221, and the fourth passage 2213 and the fifth passage 2214 are axially symmetrically distributed with the central axis of the third sub-plate 221 as the central axis, so that when the first fluid converges from the fourth passage 2213 and the fifth passage 2214 to the sixth passage 2215, the flow rates and the flow rates in the fourth passage 2213 and the fifth passage 2214 are substantially the same, which is favorable for converging the first fluid in the second current collector 2. The center of the fourth hole 2221 may be understood as the center point of the cross-sectional shape, such as the center of a circle, the intersection of the major axis and the minor axis of an ellipse, the intersection of three perpendicular lines of a triangle, etc.

In other embodiments, only one fourth hole 2221 may be provided, and one fourth hole 2221 is extended along the arrangement direction of the heat exchange tubes 31 and is communicated with the sixth channel 2215; or two fourth holes 2221 may be provided along the arrangement direction of the heat exchange tubes 31, and each fourth hole 2221 communicates with the sixth channel 2215. It should be understood that the centers of the at least two fourth holes 2221 may be uniformly distributed at equal intervals, or may be uniformly distributed at unequal intervals; the centers of the at least two fourth holes 2221 may or may not be linearly arranged; when the holes are linearly distributed, a straight line formed by the centers of the at least two fourth holes 2221 may coincide with the central axis of the fourth sub-board 222 or may not coincide with the central axis; the sixth passage 2215 may not be disposed on the central axis of the third sub-plate 221, that is, the third rib 2211 and the fourth rib 2212 may not be distributed in an axisymmetric manner, as long as the flow of the first fluid is not affected, which is not limited in the present application.

In the present embodiment, the plurality of fourth holes 2221 have a waist shape with a uniform shape and size. In other embodiments, the fourth hole 2221 may also be circular, rectangular, or have other shapes such as a special shape; the shape and size of the fourth holes 2221 may be the same or different, as long as the flow of the first fluid is not affected, and the present application is not limited thereto. The specific distribution and shape and size of the fourth holes 2221, the sixth passages 2215, the third ribs 2211 and the fourth ribs 2212 can be designed and matched according to actual requirements during use.

The third plate 21, the third sub-plate 221 and the fourth sub-plate 222 are stacked and brazed to form a second current collector 2, the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215 are all located inside the second current collector 2, the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215 jointly form an inner cavity of the second current collector 2, and an inner cavity of the heat exchange tube 31 is communicated with an inner cavity of the first current collector 1 and an inner cavity of the second current collector 2. The second collecting piece 2 is formed by stacking plates and then brazing, so that the heat exchanger using the second collecting piece 2 has better compressive strength and can be suitable for a heat exchange system running at high pressure.

As shown in fig. 1 to 3, the heat exchanger further includes a first pipe 5 connected to the first header 1 and a second pipe 6 connected to the second header 2, the first pipe 5 is provided with a first end cap 51 for sealing one end of the first pipe 5, and the second pipe 6 is provided with a second end cap 61 for sealing one end of the second pipe 6.

The first pipe 5 includes a first planar wall 52 attached to the second sub-plate 122 on a side away from the first sub-plate 121, the first planar wall 52 is provided with a first communication hole 53, and the first communication hole 53 communicates with the third passage 1215 through the second hole 1221. The first communication holes 53 and the second holes 1221 are arranged in a one-to-one correspondence manner, and the shape and size of the outer contour of the first communication holes 53 are the same as those of the outer contour of the second holes 1221. The second pipe 6 includes a second planar wall 62 attached to the fourth sub-plate 222 on the side away from the third sub-plate 221, the second planar wall 62 is provided with a second communication hole 63, and the second communication hole 63 communicates with the sixth passage 2215 through the fourth hole 2221. The second communication holes 63 and the fourth holes 2221 are provided in a one-to-one correspondence, and the outer contour of the second communication holes 63 has the same shape and size as those of the fourth holes 2221. The inner cavity of the first piping 5 is communicated with the inner cavity of the second piping 6 through the inner cavity of the first manifold 1, the inner cavity of the heat exchange tube 31, and the inner cavity of the second manifold 2.

In other embodiments, the first communicating holes 53 and the second holes 1221 may not be arranged in a one-to-one correspondence, the second communicating holes 63 and the fourth holes 2221 may not be arranged in a one-to-one correspondence, the shape and size of the outer contour of the first communicating holes 53 may not be the same as the shape and size of the outer contour of the second holes 1221, the shape and size of the outer contour of the second communicating holes 63 may not be the same as the shape and size of the outer contour of the fourth holes 2221, the shape and size of the outer contour between the first communicating holes 53 or the second communicating holes 63 may not be the same, and the specific distribution and shape and size of the first communicating holes 53 and the second communicating holes 63 may be configured in various ways according to actual requirements during use.

According to another embodiment of the first pipe 5, the second pipe 6, the fourth sub-plate 222, and the second sub-plate 122 of the heat exchanger of the present application, as shown in fig. 4, the first pipe 5 further includes the first extending portion 54 and the first positioning portion 55, and the second sub-plate 122 further includes the second positioning portion 1223. The first extending portion 54 is formed by extending the edge portion of the first communicating hole 53 toward the second sub-board 122, and the first extending portion 54 is inserted into the second hole 1221, so that the position between the first pipe 5 and the first collecting member 1 is relatively fixed, the communication between the first communicating hole 53 and the second hole 1221 is more reliable, and the reliability of the communication between the first pipe 5 and the first collecting member 1 can be further enhanced by the cooperation of the first positioning portion 55 and the second positioning portion 1223. Referring to fig. 4, the second pipe 6 further includes a second extending portion (not shown) and a third positioning portion (not shown), and the fourth sub-plate 222 further includes a fourth positioning portion (not shown). The second extending portion is formed by extending the edge portion of the second communication hole 63 toward the fourth sub-plate 222, and the second extending portion is inserted into the fourth hole 2221, so that the position between the second pipe 6 and the second header 2 can be relatively fixed, the communication between the second communication hole 63 and the fourth hole 2221 is more reliable, and the reliability of the communication between the second pipe 6 and the second header 2 can be further enhanced by the cooperation of the third positioning portion and the fourth positioning portion.

The fitting position of the first piping 5 and the first header 1 is relatively fixed, and the fitting position of the second piping 6 and the second header 2 is relatively fixed, so that on one hand, the reliability of communication between the first communication hole 53 and the second hole 1221 and the reliability of communication between the second communication hole 63 and the fourth hole 2221 can be increased, the flow of the first fluid can be smooth, on the other hand, the reliability of assembly of the second piping 6 and the second header 2 can be increased, and the heat exchanger assembly process can be simplified.

In other embodiments, the first pipe 5 may be provided with only one of the first extending portion 54 and the first positioning portion 55, the second pipe 6 may be provided with only one of the first extending portion 54 and the first positioning portion 55, only a part of the first communication holes 53 may be provided with the first extending portion 54, only a part of the second communication holes 63 may be provided with the second extending portion, and positioning between the first pipe 5 and the first header 1 and between the second pipe 6 and the second header 2 may be achieved, which is not limited in the present application.

The flow path of the first fluid is as follows: the first fluid flows into the heat exchanger from the first piping 5, flows into the inner chamber of the first header 1 via the first communication hole 53 and the second hole 1221, is then distributed to the first passage 1213 and the second passage 1214 via the third passage 1215, flows into the inner chamber of the heat exchange tube 31, flows along the heat exchange tube 31 to the inner chamber of the second header 2, then converges to the sixth passage 2215 via the fourth passage 2213 and the fifth passage 2214, flows into the second piping 6 via the second communication hole 63 and the fourth hole 2221, and finally flows out of the heat exchanger.

In the present embodiment, as shown in fig. 1, 2 and 8, the heat exchanger further includes an integrally formed shell 4, the shell 4 includes a first opening 41 and a second opening 42 respectively communicated with the inner cavity of the shell 4, the first opening 41 is disposed close to the first collecting member 1 relative to the second opening 42, and the second opening 42 is disposed close to the second collecting member 2 relative to the first opening 41. The main body portion 313 of the heat exchange tube 31 includes first and second end portions 3131 and 3132 disposed opposite to each other in a width direction of the heat exchange tube 31.

The housing 4 includes a first wall 43 and a second wall 44 disposed opposite to each other, and the main body portion 313 of the heat exchange pipe 31 is disposed between the first wall 43 and the second wall 44. The first opening 41 and the second opening 42 are used for guiding the second fluid to flow into and out of the inner cavity of the shell 4 respectively, the length direction of the first opening 41 and the second opening 42 is arranged in parallel with the arrangement direction of the heat exchange tubes 31, and the first opening 41 and the second opening 42 can be arranged on the first wall 43, the second wall 44 or the first wall 43 and the second wall 44 respectively.

The heat exchanger further comprises a first limiting portion 8 and a second limiting portion 9, the first limiting portion 8, the second limiting portion 9 and the shell 4 are formed in an integrated mode, the shell 4 formed in an integrated mode is high in strength and can reduce welding seams, and the possibility of leakage of the second fluid is reduced. As shown in fig. 8 to 11, the first stopper portion 8 is provided to the first wall 43, the second stopper portion 9 is provided to the second wall 44, the first stopper portion 8 includes a plurality of first groove portions 82 extending in the length direction of the heat exchange tube 31, the plurality of first groove portions 82 are disposed substantially in parallel in the arrangement direction of the heat exchange tube 31, the second stopper portion 9 includes a plurality of second groove portions 92 extending in the length direction of the heat exchange tube 31, the plurality of second groove portions 92 are disposed substantially in parallel in the arrangement direction of the heat exchange tube 31, the first end portion 3131 of each heat exchange tube 31 is fitted with one of the first groove portions 82, the second end portion 3132 is fitted with one of the second groove portions 92, and each heat exchange tube 31 is perpendicular to the first wall 43 and the second wall 44. The first groove portion 82 includes a first bottom wall 821, two first side walls 822 and a first groove 823 formed by the first bottom wall 821 and the two first side walls 822 respectively located at two sides of the first bottom wall 821, the first bottom wall 821 and the two first side walls 822 are respectively attached to the main body portion 313 of the heat exchange tube 31, at least a part of the first end portion 3131 is received in the first groove 823, the second groove portion 92 includes a second bottom wall 921, two second side walls 922 and a second groove 923 formed by the second bottom wall 921 and the two second side walls 922 respectively located at two sides of the second bottom wall 921, the second bottom wall 921 and the two second side walls 922 are respectively attached to the main body portion 313 of the heat exchange tube 31, at least a part of the second end portion 3132 is received in the second groove 923, and opening directions of the first groove 823 and the second groove 923 are both disposed toward the heat exchange tube 31.

In the present embodiment, one first sidewall 822 of each first groove portion 82 forms one first protrusion 81, a certain distance is left between two adjacent first groove portions 82, that is, a heat exchange tube 31 is disposed between the sidewalls of each first groove portion 82, and no heat exchange tube 31 is disposed between the sidewalls of two adjacent first groove portions 82; one second side wall 922 of each second groove part 92 forms one second protrusion 91, a certain distance is arranged between two adjacent second groove parts 92, namely, the heat exchange tube 31 is arranged between the side walls of two sides of each second groove part 92, and the heat exchange tube 31 is not arranged between the side walls of two adjacent second groove parts 92. The first and second end portions 3131 and 3132 have cross-sectional shapes corresponding to the cross-sectional shapes of the first and second grooves 823 and 923. referring to fig. 9 and 17, the main body 313 of the heat exchange tube 31 has a kidney-shaped cross-section, i.e., the first and second end portions 3131 and 3132 each have a substantially U-shaped cross-section, and the first and second grooves 823 and 923 have U-shaped cross-sections; the cross section of the main body 313 of the heat exchange tube 31 is substantially square, and the cross sections of the first groove 823 and the second groove 923 are substantially concave, so that the first bottom wall 821 and the second bottom wall 921 are respectively closely attached to the first end 3131 and the second end 3132, and the first limiting portion 8, the second limiting portion 9 and the heat exchange tube 31 are firmly matched with each other.

In other embodiments, the cross-sectional shapes of the first and second end portions 3131 and 3132 and the cross-sectional shapes of the first and second grooves 823 and 923 may not be the same, for example, the cross-sectional shapes of the first and second end portions 3131 and 3132 are both substantially U-shaped, and the cross-sectional shapes of the first and second grooves 823 and 923 are substantially "concave", as long as the position of the heat exchange tube 31 in the inner cavity of the housing 4 can be relatively fixed by the first and second groove portions 82 and 92. Through the uniform arrangement of the first groove parts 82 and the second groove parts 92, the heat exchange tubes 31 are also uniformly arranged in the inner cavity of the shell 4, the flow rate and the flow velocity of the second fluid on two sides of each heat exchange tube 31 can be basically the same, the heat exchange of the first fluid and the second fluid can be sufficient, and therefore the heat exchanger has a good heat exchange effect. Referring to fig. 17, a heat exchanging element 32 may be disposed between two adjacent heat exchanging pipes 31, and at least a portion of the heat exchanging element 32 is connected to the heat exchanging pipes 31, so that an effect of enhancing heat exchange between the first fluid and the second fluid may be achieved, and a heat exchanging effect of the heat exchanger may be further improved. The heat exchanging elements 32 may be fins in the form of a sheet, or may be other sheet structures capable of realizing heat transfer, and the heat exchanging elements 32 may be integrated structures or combined structures. In other embodiments, one first protrusion 81 may also be formed by the first side walls 822 of two adjacent first groove portions 82, and one second protrusion 91 may also be formed by the second side walls 922 of two adjacent second groove portions 92; the first bottom wall 821 of the first groove portion 82 may be a portion of the first wall 43, and the first end portion 3131 is disposed between the two first side walls 822 and connected to the first wall 43; the second bottom wall 921 of the second slot portion 92 can be a portion of the second wall 44, and the second end 3132 is disposed between the two second side walls 922 and connected to the second wall 44.

In other embodiments, referring to fig. 12-14, the heat exchanger may be further provided with only the first position-limiting portion 8 and no second position-limiting portion 9, the first end 3131 of the heat exchange tube 31 is engaged with the first position-limiting portion 8, and the second end 3132 is connected to the second wall 44; it is also possible to provide only the second position-limiting portion 9 without the first position-limiting portion 8, the second end 3132 of the heat exchange tube 31 is engaged with the second position-limiting portion 9, and the first end 3131 is connected to the first wall 43; it is also possible to provide both the first stopper portion 8 and the second stopper portion 9, but a portion of the heat exchange tube 31 has the first end 3131 engaged with the first stopper portion 8, the second end 3132 connected to the second wall 44, another portion of the heat exchange tube 31 has the second end 3132 engaged with the second stopper portion 9, and the first end 3131 connected to the first wall 43, as long as the position of the heat exchange tube 31 in the inner cavity of the housing 4 can be relatively fixed, and most of the second fluid flows in the channel between the adjacent heat exchange tubes 31, only a small amount of the second fluid flows in the gap between the heat exchange tube 31 and the housing 4 or no second fluid flows in the gap between the heat exchange tube 31 and the housing 4, which is not limited in the present application.

In this embodiment, the first opening 41 and the second opening 42 are both disposed on the first wall 43, along the length direction of the heat exchange tube 31, the length of the first protrusion 81 is equal to the length of the first wall 43 minus the width of the first opening 41 and the width of the second opening 42, the length of the second protrusion 91 is equal to the length of the second wall 44, the plane where the first port 311 and the body 313 are connected, the end surfaces of the first wall 43 and the second wall 44 near the first collector 1, the end surface of the first protrusion 81 near the first collector 1, and the end surface of the second protrusion 91 near the first collector 1 are all located on the same horizontal plane, the plane where the second port portion 312 and the body portion 313 are connected, the end surfaces of the first wall 43 and the second wall 44 near the second current collector 2, the end surface of the first protrusion 81 near the second current collector 2, and the end surface of the second protrusion 91 near the second current collector 2 are all located on the same horizontal plane. It can be understood that, after the shell 4 is connected to the first collecting member 1 and the second collecting member 2, the plane where the first port 311 and the body 313 are connected, the end surfaces of the first wall 43 and the second wall 44 close to the first collecting member 1, and the end surfaces of the first protrusion 81 and the second protrusion 91 close to the first collecting member 1 are all attached to the first plate 11 of the first collecting member 1, and the plane where the second port 312 and the body 313 are connected, the end surfaces of the first wall 43 and the second wall 44 close to the second collecting member 2, and the end surfaces of the first protrusion 81 and the second protrusion 91 close to the second collecting member 2 are all attached to the third plate 21 of the second collecting member 2.

In other embodiments of the present application, if the first opening 41 and the second opening 42 are both disposed on the first wall 43, the length of the first protrusion 81 may be smaller than the length of the first wall 43 minus the width of the first opening 41 and the width of the second opening 42, and the length of the second protrusion 91 may also be smaller than the length of the second wall 44. For example, referring to fig. 18, the first projection 81 and the second projection 91 are provided between the first opening 41 and the second opening 42 along the length direction of the heat exchange tube 31; or the first protrusion 81 and the second protrusion 91 may be formed of two parts respectively between the first opening 41 and the first current collector 1 and between the second opening 42 and the second current collector 2 along the length direction of the heat exchange tube 31, as long as the position of the heat exchange tube 31 in the inner cavity of the housing 4 is relatively fixed.

In other embodiments of the present application, the first position-limiting portion 8, the second position-limiting portion 9 and the housing 4 may not be integrally formed, and only the housing 4 may be integrally formed, and the first position-limiting portion 8 and the second position-limiting portion 9 are fixed to the housing 4 by brazing; the shell 4 can also be formed by splicing a plurality of components, and the first limiting part 8 and the second limiting part 9 can be fixed on the shell 4 by brazing; the housing 4 may be formed by splicing a plurality of components, the first position-limiting portion 8 is integrally formed with one of the components, and the second position-limiting portion 9 is integrally formed with one of the components.

The heat exchanger further comprises a connecting piece 7, the connecting piece 7 comprises a first piece 71, a second piece 72 and a first cavity 73 formed by the first piece 71 and the second piece 72, the first piece 71 is connected with the shell 4, the first cavity 73 is communicated with the inner cavity of the shell 4, and the connecting piece 7 is arranged at each of the first opening 41 and the second opening 42. As shown in fig. 2, 15 and 16, the first member 71 includes a first annular sidewall 711, a second annular sidewall 712 and a first step portion 713 connecting the first annular sidewall 711 and the second annular sidewall 712, one end of the first step portion 713 is connected to the first annular sidewall 711 and the other end is connected to the second annular sidewall 712, at least a portion of the first annular sidewall 711 is fixedly connected to the peripheral portion of the first opening 41 or the peripheral portion of the second opening 42, the end surface of the first annular sidewall 711 near the heat exchange tube 31 is attached to or close to the heat exchange tube 31, that is, the fitting between the heat exchange core 3 and the shell 4 is not affected after the connection member 7 is fixed to the shell 4, and the cross section of the first member 71 is substantially in a shape of a horn. The second part 72 comprises a third annular side wall 721 and a third bottom wall 722 connected to the end of the third annular side wall 721 remote from the first part 71, the third bottom wall 722 comprising a third through hole, the first chamber 73 communicating with the third through hole and with the internal chamber of the casing 4, the second part 72 being substantially U-shaped in cross-section. In this embodiment, the third annular sidewall 721 is disposed around and attached to the second annular sidewall 712, and an outer sidewall of the second annular sidewall 712 is attached to an inner sidewall of the third annular sidewall 721 to connect the first member 71 and the second member 72 in a relatively sealed manner. In other embodiments, the inner sidewall of the second annular sidewall 712 may be attached to the outer sidewall of the third annular sidewall 721; alternatively, the third annular sidewall 721 may not be disposed around the second annular sidewall 712, and other mating structures, such as a toothed engagement, may be used to sealingly couple the first member 71 and the second member 72.

The heat exchange core body 3 comprises a plurality of layers of heat exchange tubes 31 arranged in parallel, a plurality of circulation channels for the circulation of the second fluid are formed between two adjacent layers of heat exchange tubes 31 and between the heat exchange tubes 31 and the shell 4, and the plurality of circulation channels are not communicated basically. It is to be understood here that substantially no communication means that two flow channels may communicate with each other through a relatively small gap, for example a gap between the heat exchange tube 31 and the first restriction 8 or the first wall 43, but that much less second fluid may flow through the gap than through one flow channel. The heat exchange tube 31 includes a first port portion 311, a second port portion 312 and a main body portion 313, the first port portion 311 is plugged in the first current collector 1, the second port portion 312 is plugged in the second current collector 2, and the main body portion 313 is accommodated in the inner cavity of the housing 4. Optionally, the heat exchange tube 31 is a flat tube, the flat tube is provided with a plurality of channels parallel to each other, the plurality of channels jointly form an inner cavity of the heat exchange tube 31, and the first fluid flows in the channels. Of course, the flat tube may be provided with only one or two channels.

In the present embodiment, the first opening 41 and the second opening 42 are respectively provided with one and are both substantially square, the length directions of the first opening 41 and the second opening 42 are arranged in parallel with the arrangement direction of the heat exchange tubes 31, one first opening 41 communicates with all the flow channels in the inner cavity of the housing 4, and one second opening 42 also communicates with all the flow channels in the inner cavity of the housing 4. In other embodiments, there may be at least two first openings 41 and second openings 42, and each first opening 41 and each second opening 42 are communicated with at least one flow channel, and the structure of the first annular side wall 711 of the first member 71 is designed correspondingly in order to satisfy the sealing connection of the connecting member 7 to the housing 4.

Optionally, when each layer of heat exchange tubes 31 is a flat tube, one of the two side walls of the flat tube in the width direction is connected to the first limiting portion 8, and the other side wall is connected to the second limiting portion 9; when each layer of heat exchange tube 31 is at least two flat tubes arranged side by side, one side wall of one of the two flat tubes positioned at the outermost side is connected to the first limiting part 8, one side wall of the other flat tube is connected to the second limiting part 9, the first port part 311 of each flat tube is connected to the first current collector 1, the second port part 312 is connected to the second current collector 2, the main body parts 313 of the two adjacent flat tubes of each layer of heat exchange tube 31 are connected through the connecting part, and one end of the connecting part is connected to the first current collector 1 and the other end of the connecting part is connected to the second current collector 2.

In this embodiment, the first opening 41 is used for the inflow of the second fluid, the second opening 42 is used for the outflow of the second fluid, and the flow path of the second fluid is as follows: the second fluid flows into the heat exchanger through the third through hole of the connecting member 7 connected to the first opening 41, is branched to the plurality of flow channels in the inner cavity of the housing 4 through the first chamber 73 of the connecting member 7, completes the heat exchange between the first fluid and the second fluid in the inner cavity of the housing 4, and then the second fluid is converged to the first chamber 73 of the connecting member 7 connected to the second opening 42 and flows out of the heat exchanger through the third through hole of the connecting member 7.

According to another specific embodiment of the heat exchanger of the present application, the structure of the heat exchanger of the present embodiment is substantially the same as that of the above-described heat exchanger, as shown in fig. 19 to 23, except that: the third passages 1215 are provided at least two, and the extending direction and the arrangement direction of the at least two third passages 1215 are arranged in parallel with the arrangement direction of the heat exchange tubes 31. The fourth sub-board 222 is not provided with the fourth hole 2221. The first sub-plate 121 further includes a fifth rib 1216 positioned between and spacing the two adjacent third channels 1215, the fifth rib 1216 extends along the width direction of the heat exchange tube 31, a first channel 1213 is formed between the fifth rib 1216 and the first rib 1211, and a second channel 1214 is formed between the fifth rib 1216 and the second rib 1212; the first channels 1213 on both sides of the fifth rib 1216 are spaced apart from each other, and the second channels 1214 on both sides of the fifth rib 1216 are spaced apart from each other in the arrangement direction of the heat exchange tubes 31. The second sub-plate 122 further includes fifth holes 1222 penetrating the second sub-plate 122 in a length direction of the heat exchange tube 31, the fifth holes 1222 communicate with at least one third passage 1215, the third passages 1215 communicating with the second holes 1221 and the fifth holes 1222 are not directly communicated, and the second holes 1221 and the fifth holes 1222 are respectively located at both sides of the fifth ribs 1216 in an arrangement direction of the heat exchange tube 31. The first pipe 5 and the second pipe 6 are fixedly connected to the second sub plate 122, the first communication hole 53 communicates with at least one third passage 1215 through the second hole 1221, and the second communication hole 63 communicates with at least the third passage 1215 through the fifth hole 1222. The thickness of the fifth rib 1216 is equal to that of the first sub-board 121, i.e., one side of the fifth rib 1216 is connected to the second sub-board 122 and the other side is connected to the first board 11.

Taking the first sub-plate 121 with one fifth rib 1216 and two third channels 1215 as an example, referring to fig. 20, the fifth rib 1216 is disposed in the middle of the first sub-plate 121, the first channel 1213, the second channel 1214 and the third channel 1215 located on one side of the fifth rib 1216 are communicated with the first channel 1213, the second channel 1214 and the third channel 1215 located on the other side of the fifth rib 1216 through the heat exchange tube 31 and the second current collector 2, and the inner cavity of the first piping 5 is communicated with the inner cavity of the second piping 6 through the inner cavity of the heat exchange tube 31 and the second current collector 2. Since the end surface of the heat exchange tube 31 passes through the first plate 11 without passing through the first sub-plate 121 when the first port portion 311 is inserted into the first manifold 1, in conjunction with the thickness setting of the fifth rib 1216, the inner cavity of the first manifold 1 is partitioned into a first inner cavity and a second inner cavity which are not directly communicated.

The flow path of the first fluid of the present embodiment is as follows: the first fluid flows into the heat exchanger from the first piping 5, flows into the first inner chamber via the first communication hole 53 and the second hole 1221, is distributed from the third passage 1215 to the first passage 1213 and the second passage 1214 in the first inner chamber, then flows into a portion of the heat exchange tube 31 communicating with the first inner chamber, flows along the portion of the heat exchange tube 31, exchanges heat with the second fluid in the inner chamber of the case 4, then flows into the inner chamber of the second header 2, then flows into a portion of the heat exchange tube 31 communicating with the second inner chamber via the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215, flows along the portion of the heat exchange tube 31, exchanges heat again with the second fluid in the inner chamber of the case 4, merges to the second inner chamber, flows from the first passage 1213 and the second passage 1214 to the third passage 1215 in the second inner chamber, and then flows into the second piping 6 via the second communication hole 63 and the fifth hole 1222, and finally flows out of the heat exchanger.

By arranging the fifth rib 1216 and the two third channels 1215 on the first sub-plate 121, and arranging the second hole 1221 and the fifth hole 1222 which are not directly communicated on the second sub-plate 122, the flow path of the first fluid is approximately U-shaped, the heat exchange path of the first fluid and the second fluid is extended, the heat exchange effect of the first fluid and the second fluid can be improved, and thus the heat exchange effect of the heat exchanger is improved. The fifth ribs 1216 may further extend the flow path of the first fluid, so as to further improve the heat exchange effect between the first fluid and the second fluid.

Other structures of this embodiment are the same as those of the above embodiments, and are not described herein again.

According to other embodiments of the first current collector 1 of the present application, the first sub-plate 121 and the second sub-plate 122 may be formed on the second plate 12 which is integrally formed and has a substantially plate shape, optionally, the first rib 1211, the second rib 1212, the second hole 1221, and the fifth hole 1222 may be formed by machining, and the arrangement of the first rib 1211, the second rib 1212, the second hole 1221, and the fifth hole 1222 is substantially the same as that of the above embodiments, and will not be described again. The second plate 12 includes a first surface and a second surface, the first surface is a side surface of the second plate 12 far from the first plate 11, the second surface is attached to a side of the first plate 11 far from the housing 4, the second hole 1221 is disposed on the first surface and penetrates through the second plate 12 along the length direction of the heat exchange tube 31, the first rib 1211, the second rib 1212, the fifth rib 1216, the first channel 1213, the second channel 1214 and the third channel 1215 are disposed between the first surface and the second surface, the first channel 1213, the second channel 1214 and the third channel 1215 are all formed by partially recessing the second surface toward the first surface, and the first channel 1213, the second channel 1214 and the third channel 1215 are communicated with the first hole 1111. The first plate 11 and the second plate 12 are stacked and brazed to form the first current collector 1, the first channel 1213, the second channel 1214 and the third channel 1215 are all positioned inside the first current collector 1, the first channel 1213, the second channel 1214 and the third channel 1215 together form an inner cavity of the first current collector 1, and the inner cavity of the heat exchange tube 31 is communicated with the inner cavity of the first current collector 1. The first sub-plate 121 and the second sub-plate 122 are formed on the integrally formed second plate 12, and the first current collector 1 is formed only by stacking two plates, so that welding seams can be reduced, and the risk of leakage of the first fluid can be reduced.

According to other embodiments of the second collecting member 2 in the present application, the third sub-plate 221 and the fourth sub-plate 222 may be formed on the substantially plate-shaped fourth plate 22, which is integrally formed, optionally, the third rib 2211, the fourth rib 2212 and the fourth hole 2221 may be formed by machining, and the arrangement of the third rib 2211, the fourth rib 2212 and the fourth hole 2221 is substantially the same as that in the above embodiments, and will not be described here again. The third plate 21 and the fourth plate 22 are stacked and brazed to form the second collecting member 2, the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215 are all located inside the second collecting member 2, the fourth passage 2213, the fifth passage 2214 and the sixth passage 2215 together form an inner cavity of the second collecting member 2, and the inner cavity of the heat exchange tube 31 is communicated with the inner cavity of the second collecting member 2. The third sub-plate 221 and the fourth sub-plate 222 are formed on the integrally formed fourth plate 22, and the second current collector 2 is formed only by stacking two plates, so that welding seams can be reduced, and the risk of leakage of the first fluid can be reduced.

In other embodiments of the heat exchanger of the present application, the structural design of the heat exchanger is substantially the same as that of the above embodiments, except that the first opening 41 is used for the outflow of the second fluid, the second opening 42 is used for the inflow of the second fluid, and the first fluid and the second fluid form a counter-current heat exchange, so that the heat exchange effect of the first fluid and the second fluid is enhanced. The first pipe 5 may be designed to allow the first fluid to flow out and the second pipe 6 may be designed to allow the first fluid to flow in, so that the first fluid and the second fluid may perform heat exchange in a counter-flow manner.

Taking the structure of one embodiment of the heat exchanger of the present application as an example, the assembling method of the heat exchanger includes:

a: inserting each layer of heat exchange tubes 31 into the inner cavity of the shell 4 in sequence, wherein the first end 3131 of each layer of heat exchange tubes 31 is plugged into the first slot 82, the second end 3132 of each layer of heat exchange tubes 31 is plugged into the second slot 92, after plugging, each layer of heat exchange tubes 31 is perpendicular to the first wall 43 and the second wall 44, and the length direction of each layer of heat exchange tubes 31 is parallel to the length direction of the shell 4;

b: then, the heat exchange piece 32 is placed between two adjacent layers of heat exchange tubes 31;

c: inserting the first port 311 into the first hole 1111 of the first current collector 1, inserting the second port 312 into the third hole 2111 of the second current collector 2, pushing one or both of the first current collector 1 and the second current collector 2 to move towards the housing 4, so that the end surface of the housing 4 close to one end of the first current collector 1 is attached to the first current collector 1, the end surface of the housing 4 close to one end of the second current collector 2 is attached to the second current collector 2, and the body 313 of the heat exchange tube 31 is accommodated in the inner cavity of the housing 4;

d: the first chamber 73 communicates with the inner chamber of the housing 4 by inserting the connecting member 7 into the first opening 41 and the second opening 42, respectively.

According to the actual use requirement of the heat exchanger, whether the heat exchange pipe 31 of the adjacent layer is provided with the heat replacement piece 32 or not can be selected, namely the step b can be omitted.

Although the present application has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the application, and all changes, substitutions and alterations that fall within the spirit and scope of the application are to be understood as being covered by the following claims.

Claims (11)

1. A heat exchanger, comprising: the heat exchanger comprises a first current collecting piece (1), a second current collecting piece (2) and a heat exchange core body (3);

the heat exchange core body (3) comprises a plurality of layers of heat exchange tubes (31) which are arranged in parallel, each heat exchange tube (31) comprises a first port portion (311) and a second port portion (312), each first port portion (311) is connected to the corresponding first current collecting piece (1), and each second port portion (312) is connected to the corresponding second current collecting piece (2);

the first current collector (1) comprises a first plate (11) and a second plate (12) which are arranged in parallel, the second plate (12) is attached to one side, away from the heat exchange tube (31), of the first plate (11), the first plate (11) comprises a first body part (111), the first body part (111) comprises a plurality of first holes (1111) which are arranged in parallel, and the first port part (311) is inserted into the first holes (1111);

the second plate (12) comprises a plurality of first ribs (1211), a plurality of second ribs (1212) and second holes (1221) penetrating through the second plate (12) along the length direction of a heat exchange tube (31), the extending directions of the first ribs (1211) and the second ribs (1212) are approximately parallel to the width direction of the heat exchange tube (31), the second plate (12) further comprises at least one third channel (1215) extending along the arrangement direction of the heat exchange tube (31), the first ribs (1211) and the second ribs (1212) are oppositely arranged along the width direction of the heat exchange tube (31) and are respectively positioned at two sides of the third channel (1215), the second holes (1221) are communicated with the at least one third channel (1215), the first ribs (1211) are mutually arranged in parallel, a first channel (1213) is formed between two adjacent first ribs (1211), the second ribs (1212) are mutually arranged in parallel, and a second channel (1212) is formed between two adjacent second ribs (1212) -channels (1214), -said first channels (1213) and said second channels (1214) both communicating with said third channel (1215), -the inner cavity of the heat exchange tube (31) communicating with said third channel (1215), -at least one first channel (1213) and at least one second channel (1214).

2. A heat exchanger according to claim 1, wherein the second plate (12) comprises a first sub-plate (121) and a second sub-plate (122) arranged side by side; the first rib (1211) and the second rib (1212) are located on the first sub-plate (121), the first channel (1213), the second channel (1214) and the third channel (1215) are formed in the first sub-plate (121), the second hole (1221) is located on the second sub-plate (122), the second hole (1221) penetrates through the second sub-plate (122) along the length direction of the heat exchange tube (31), and the second sub-plate (122) is attached to one side, away from the first plate (11), of the first sub-plate (121).

3. A heat exchanger according to claim 1, wherein the second collecting member (2) comprises a third plate (21) and a fourth plate (22) arranged in parallel, the fourth plate (22) is attached to the third plate (21) at a side away from the heat exchange tubes (31), the third plate (21) comprises a second body portion (211), the second body portion (211) comprises a plurality of third holes (2111) arranged in parallel, and the second port portion (312) is inserted into the third holes (2111);

the fourth plate (22) comprises a plurality of third ribs (2211) and a plurality of fourth ribs (2212), the extending directions of the third ribs (2211) and the fourth ribs (2212) are approximately parallel to the width direction of the heat exchange tube (31), the fourth plate (22) further comprises at least one sixth channel (2215) extending along the arrangement direction of the heat exchange tube (31), the third ribs (2211) and the fourth ribs (2212) are oppositely arranged along the width direction of the heat exchange tube (31) and are respectively positioned at two sides of the sixth channel (2215), the plurality of third ribs (2211) are mutually juxtaposed and form a fourth channel (2213) between two adjacent third ribs (2211), the plurality of fourth ribs (2212) are mutually juxtaposed and form a fifth channel (4) between two adjacent fourth ribs (2212), and the fourth channel (2213) and the fifth channel (2214) are both communicated with the sixth channel (2215), the inner cavity of the heat exchange tube (31) is communicated with the sixth channel (2215), at least one fourth channel (2213) and at least one fifth channel (2214).

4. A heat exchanger according to claim 3 wherein the fourth plate (22) further comprises fourth holes (2221) extending through the fourth plate (22) along the length of the heat exchange tube (31), the fourth holes (2221) communicating with all of the sixth passages (2215), the second holes (1221) communicating with all of the third passages (1215); the heat exchanger further comprises a first piping (5) and a second piping (6), the first piping (5) comprises a first end cap (51) for blocking one end of the first piping (5), the second piping (6) comprises a second end cap (61) for blocking one end of the second piping (6), the first piping (5) comprises a first planar wall (52) attached to one side of the second plate (12) away from the first plate (11), the second piping (6) comprises a second planar wall (62) attached to one side of the fourth plate (22) away from the third plate (21), the first planar wall (52) is provided with a first communication hole (53), the first communication hole (53) is communicated with the third passage (1215) through the second hole (1221), the second planar wall (62) is provided with a second communication hole (63), the second communication hole (63) communicates with the sixth passage (2215) through the fourth hole (2221), and the inner cavity of the first piping (5) communicates with the inner cavity of the second piping (6) through the inner cavity of the heat exchange pipe (31).

5. A heat exchanger according to claim 3, wherein the third passages (1215) are provided in at least two, and the arrangement direction of at least two of the third passages (1215) is arranged in parallel with the arrangement direction of the heat exchange tubes (31), and the second plate (12) further comprises a fifth rib (1216) which is positioned between and spaces adjacent two of the third passages (1215), the fifth rib (1216) extending in the width direction of the heat exchange tubes (31), the first passage (1213) being formed between the fifth rib (1216) and the first rib (1211), and the second passage (1214) being formed between the fifth rib (1216) and the second rib (1212); along the arrangement direction of the heat exchange tubes (31), first channels (1213) positioned at two sides of the fifth rib (1216) are arranged at intervals, and second channels (1214) positioned at two sides of the fifth rib (1216) are arranged at intervals; the second hole (1221) communicates with the third passage (1215) on the side of the fifth bead (1216): the first channel (1213), the second channel (1214) and the third channel (1215) on one side of the fifth rib (1216) communicate with the first channel (1213), the second channel (1214) and the third channel (1215) on the other side of the fifth rib (1216) through the heat exchange tube (31) and the second header (2).

6. A heat exchanger according to claim 5 wherein the second plate (12) further comprises fifth holes (1222) penetrating the second plate (12) in a lengthwise direction of the heat exchange tubes (31), the fifth holes (1222) communicating with at least one of the third passages (1215), the second holes (1221) and the fifth holes (1222) being located on both sides of the fifth ribs (1216) in an arrangement direction of the heat exchange tubes (31), respectively; the heat exchanger further comprises a first piping (5) and a second piping (6), the first piping (5) comprises a first end cap (51) for blocking one end of the first piping (5), the second piping (6) comprises a second end cap (61) for blocking one end of the second piping (6), the first piping (5) comprises a first planar wall (52) attached to one side of the second plate (12) away from the first plate (11), the second piping (6) comprises a second planar wall (62) attached to one side of the second plate (12) away from the first plate (11), the first planar wall (52) is provided with a first communication hole (53), the second planar wall (62) is provided with a second communication hole (63), and the first communication hole (53) is communicated with at least one third passage (1215) through the second hole (1221), the second communication hole (63) communicates with at least one of the third passages (1215) through the fifth hole (1222); the inner cavity of the first piping (5) is communicated with the inner cavity of the second piping (6) through the inner cavity of the heat exchange pipe (31) and the second collecting piece (2).

7. A heat exchanger according to any one of claims 4 or 6, wherein at least one of the first communication hole (53) and the second communication hole (63) is provided, and the extending direction of the first communication hole (53) and the second communication hole (63) is substantially parallel to the extending direction of the third passage (1215); when the number of the first communicating holes (53) and the second communicating holes (63) is two or more, the arrangement direction of the first communicating holes (53) and the second communicating holes (63) is substantially parallel to the extending direction of the third passage (1215).

8. The heat exchanger as claimed in claim 6, wherein the first piping (5) further comprises a first extension portion (54), the first extension portion (54) being formed by extending an edge portion of the first communication hole (53) toward the second plate (12), the first extension portion (54) being inserted into the second hole (1221); at least one part of the edge part of the first communication hole (53) extends to form the first extension part (54);

the second piping (6) further includes a second extending portion provided at an edge of at least a part of the second communication hole (63), the second extending portion being formed by extending the edge of the second communication hole (63) from the second piping (6) in a direction toward the second plate (12), and the second extending portion being inserted into the fifth hole (1222).

9. A heat exchanger according to any one of claims 4 or 6, characterised in that the first tubing (5) is integrally formed with the second plate (12) and the second tubing (6) is integrally formed with the fourth plate (22); or both the first pipe (5) and the second pipe (6) are integrally molded with the second plate (12).

10. A heat exchanger according to any one of claims 4 or 6, characterized in that it further comprises a shell (4), said shell (4) comprising a first opening (41) and a second opening (42) communicating with the inner cavity of said shell (4), respectively, said first opening (41) being arranged close to said first collecting member (1) with respect to said second opening (42), said second opening (42) being arranged close to said second collecting member (2) with respect to said first opening (41);

one end of the shell (4) is hermetically connected to the first current collector (1), the other end of the shell is hermetically connected to the second current collector (2), and the main body parts of all the heat exchange tubes (31) are accommodated in the inner cavity of the shell (4); the first plate (11) further comprises a third extending portion (112) extending towards the shell (4), the third plate (21) further comprises a fourth extending portion (212) extending towards the shell (4), and the third extending portion (112) and the fourth extending portion (212) are fixedly connected with the shell (4) respectively.

11. A heat exchanger according to claim 4, wherein the first piping (5) further comprises a first extension portion (54), the first extension portion (54) being formed by extending an edge portion of the first communication hole (53) toward the second plate (12), the first extension portion (54) being inserted into the second hole (1221); at least one part of the edge part of the first communication hole (53) extends to form the first extension part (54);

the second piping (6) further includes a second extending portion, the second extending portion is provided at an edge portion of at least a part of the second communication hole (63), the second extending portion is formed by extending the edge portion surrounding the second communication hole (63) from the second piping (6) toward the fourth plate (22), and the second extending portion is inserted into the fourth hole (2221).

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