CN209802172U

CN209802172U - Flat pipe of heat exchanger and heat exchange equipment

Info

Publication number: CN209802172U
Application number: CN201920464637.4U
Authority: CN
Inventors: 周林森
Original assignee: Chongqing Chaoli Hi Tech Co Ltd
Current assignee: Chongqing super force electric appliance Co.,Ltd.
Priority date: 2019-04-08
Filing date: 2019-04-08
Publication date: 2019-12-17
Anticipated expiration: 2029-04-08

Abstract

The utility model provides a flat pipe of heat exchanger and indirect heating equipment, the flat pipe of heat exchanger include the outer tube, have the inner tube of first runner and connect in the connecting piece of inner tube and outer tube, and the outer tube is established including the overcoat, forms the second runner that surrounds the inner tube between the inner tube wall of outer tube and the outer tube wall of inner tube. High heat exchange efficiency, compact structure, small volume and small occupied space. The heat exchange equipment comprises the heat exchanger flat pipe and has all the advantages of the heat exchanger flat pipe.

Description

Flat pipe of heat exchanger and heat exchange equipment

Technical Field

The utility model relates to a heat exchange technology field particularly, relates to a flat pipe of heat exchanger and indirect heating equipment.

Background

A heat exchanger (heat exchanger) is a device that transfers part of the heat of a hot fluid to a cold fluid, and is also called a heat exchanger. The heat exchanger plays an important role in chemical industry, petroleum industry, power industry, food industry and other industrial production, can be used as a heater, a cooler, a condenser, an evaporator, a reboiler and the like in chemical industry production, and is widely applied. Heat exchangers are of a wide variety, including, for example: jacketed heat exchangers, submerged coil heat exchangers, spray heat exchangers, plate heat exchangers, shell and tube heat exchangers, and the like.

The inventor finds in research that the existing plate heat exchanger has at least the following disadvantages in the using process:

The heat exchange efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flat pipe of heat exchanger can circulate different media, improves heat exchange efficiency.

an object of the utility model is also to provide a indirect heating equipment, three kinds of media carry out the heat exchange, improve heat exchange efficiency.

The utility model discloses an adopt following technical scheme to realize:

Based on above-mentioned first purpose, the embodiment of the utility model provides a flat pipe of heat exchanger, including the outer tube, have the inner tube of first runner and connect in the connecting piece of inner tube and outer tube, outer tube including the outer tube cover is established, forms the second runner that surrounds the inner tube between the inner tube wall of outer tube and the outer tube wall of inner tube.

Optionally, the connector is located within the second flow passage.

Optionally, the length direction of the connecting member extends along the axial direction of the inner pipe or the outer pipe, and the connecting member blocks the second flow passage along the circumferential direction of the inner pipe or the outer pipe.

Optionally, the number of the connecting pieces is at least two, and the at least two connecting pieces are arranged at intervals along the circumferential direction of the inner pipe or the outer pipe to divide the second flow passage into at least two sub-passages.

Optionally, the connector, the inner tube and the outer tube are integrally formed.

Optionally, both ends of the inner tube along its length direction respectively extend out of both ends of the outer tube along its length direction.

based on above-mentioned second purpose, the embodiment of the utility model provides a heat exchange equipment, the flat pipe of heat exchanger of including.

Optionally, the heat exchange device further includes a first collecting pipe, a second collecting pipe, and a fin, the first collecting pipe has a first collecting channel and a second collecting channel that are independent of each other, and the second collecting pipe has a third collecting channel and a fourth collecting channel that are independent of each other; the heat exchanger flat tube is arranged between the first collecting pipe and the second collecting pipe, two ends of the first flow passage are respectively communicated with the first collecting channel and the third collecting channel, and two ends of the second flow passage are respectively communicated with the second collecting channel and the fourth collecting channel; the fins are arranged on the outer tube, and the fins and the outer tube form a third flow passage.

Optionally, the first collecting pipe is provided with a first inlet and a first outlet communicated with the first collecting channel, and a second inlet and a second outlet communicated with the second collecting channel.

optionally, the first collecting pipe includes a first pipe body, a first partition plate and two first sealing covers, the first partition plate is installed in a pipe cavity of the first pipe body and partitions the first pipe body to form a first collecting channel and a second collecting channel, one end of the inner pipe sequentially penetrates through the first pipe body and the first partition plate and then is communicated with the first collecting channel, and one end of the outer pipe penetrates through the first pipe body and then is communicated with the second collecting channel; the two first sealing covers respectively seal the two ends of the first pipe body in the length direction, and the second inlet and the second outlet are respectively positioned on the two first sealing covers.

Compared with the prior art, the utility model discloses a flat pipe of heat exchanger's beneficial effect that preferred embodiment provided includes:

The utility model provides a flat pipe of heat exchanger, including the outer tube of outside of tubes and connecting in the connecting piece of inner tube and outer tube including inner tube, the cover that has the first runner that supplies the medium to flow is established, forms annular confession medium flow's passageway between the outer pipe wall of inner tube and the inner pipe wall of outer tube, and this passageway is set for the second runner, and the second runner surrounds the inner tube. The first runner and the second runner of the heat exchanger flat pipes can be internally provided with different types of media for circulation respectively, and meanwhile, a third runner is formed between the fins and the outer pipe which are arranged between the adjacent heat exchanger flat pipes. In practical application, a first medium to be cooled or heated is conveyed to the second flow channel, a second medium with low temperature or high temperature is conveyed to enter the first flow channel, a third medium with low temperature or high temperature is conveyed to enter the third flow channel, heat exchange is carried out between the first medium and the second medium in the flowing process, the second medium surrounds the periphery of the first medium due to the fact that the second flow channel is the annular flow channel, the contact area between the first medium and the second medium is large, and heat exchange efficiency is high. Meanwhile, the first medium is subjected to heat exchange with the third medium in the flowing process, and the first medium is subjected to heat exchange with the second medium and the third medium at the same time, so that the heat exchange area is increased, and the heat exchange efficiency is greatly improved.

Furthermore, in the embodiment of the utility model, the connecting piece sets up in the second runner, and the connecting piece does not have exerted part, and occupation space is little, and the overall structure of the flat pipe of heat exchanger is compact, and is small, saves installation space, reduces use cost.

Furthermore, in the embodiment of the utility model provides a, the connecting piece is platelike, and the length direction of connecting piece extends along the length direction of inner tube or outer tube, and the connecting piece separates the second flow channel and forms independent subchannel, and the medium is more even when flowing in the second flow channel, and then improves heat exchange efficiency. And the contact area of the connecting piece with the inner tube and the outer tube is large, the connecting position of the connecting piece and the inner tube is firm and reliable, the connecting position of the connecting piece and the outer tube is firm and reliable, the structural strength of the whole heat exchanger flat tube is high, the service life is long, and the cost is reduced.

Furthermore, in the embodiment of the present invention, the inner tube is a tube structure having micro-channels, and when the medium flows in the inner tube, the medium flows more uniformly, thereby improving the heat exchange efficiency.

Furthermore, in the embodiment of the utility model, the inner tube passes through the connecting piece with the outer tube to be connected, and the both ends of outer tube are stretched out respectively at the both ends of inner tube, and the installation cooperation of the inner tube of being convenient for, outer tube and pressure manifold reduces the installation degree of difficulty, improves the installation effectiveness.

the embodiment also provides a heat exchange device, which comprises the heat exchanger flat tube mentioned above and has all the advantages of the heat exchanger flat tube.

Furthermore, in the embodiment of the utility model provides an in, the flat pipe of heat exchanger is installed between first pressure manifold and second pressure manifold, and first pressure manifold, the flat pipe of heat exchanger and second pressure manifold constitute two independent circulation channels, supply two kinds of different medium flows to realize the heat exchange. The whole structure is compact, and the medium can flow conveniently.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without creative efforts, and the protection scope of the present invention also belongs to the protection scope of the present invention.

Fig. 1 is a schematic structural view of a heat exchanger flat tube provided in this embodiment 1;

FIG. 2 is a partially enlarged schematic view of FIG. 1;

Fig. 3 is a schematic cross-sectional structure view of a flat tube of a heat exchanger provided in this embodiment 1;

Fig. 4 is a schematic structural diagram of the heat exchange device provided in this embodiment 2;

FIG. 5 is a partially enlarged schematic view of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the heat exchange apparatus provided in this embodiment 2;

Fig. 7 is a schematic structural diagram of a first collecting pipe provided in this embodiment 2;

fig. 8 is a schematic structural diagram of a second collecting pipe provided in this embodiment 2;

Fig. 9 is a schematic structural diagram of a fin provided in this embodiment 2.

icon: 01-a heat exchange device; 001-heat exchanger flat tube; 100-an outer tube; 110-an inner tube; 111-a first flow channel; 120-a connector; 130-a second flow channel; 131-a subchannel; 002-a first header; 200-a first tube body; 201-a first mounting port; 202-a first inlet; 203-a first outlet; 210-a first separator; 211-a first assembly opening; 220-a blocking plate; 230-a first cover; 231-a second inlet; 232-a second outlet; 240 — a first collecting channel; 241-a first inflow section; 242-first outflow section; 250-a second collection channel; 251-a second inflow section; 252-a second outflow section; 003-a second collecting pipe; 300-a second pipe body; 301-a second mounting port; 310-a second separator; 311-a second mounting port; 320-a second cover; 330-a third collecting channel; 340-a fourth collecting channel; 004-fins; 400-a third flow channel; 005-connecting the cartridge.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "inside" and "outside" are used for indicating the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship that the utility model is usually placed when using, and are only for convenience of describing the present invention and simplifying the description, but not for indicating or implying that the device or element to be referred must have a specific position, be constructed and operated in a specific position, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict.

example 1

Referring to fig. 1 to 3, the present embodiment provides a heat exchanger flat tube 001 suitable for a heat exchange device 01, where the heat exchanger flat tube 001 includes an outer tube 100, an inner tube 110 having a first flow channel 111, and a connecting member 120 connected to the inner tube 110 and the outer tube 100, the outer tube 100 is sleeved outside the inner tube 110, and a second flow channel 130 surrounding the inner tube 110 is formed between an inner wall of the outer tube 100 and an outer wall of the inner tube 110.

The utility model provides a flat pipe 001 of heat exchanger, including having the inner tube 110, the cover that supply the first runner 111 of medium flow to establish outer tube 100 outside inner tube 110 and connecting in inner tube 110 and outer tube 100's connecting piece 120, form the passageway that the annular confession medium flows between the outer pipe wall of inner tube 110 and the inner pipe wall of outer tube 100, this passageway is set for second runner 130. Different types of media can be supplied to circulate in first flow channel 111 and the second flow channel 130 of the heat exchanger flat tubes 001 respectively, and simultaneously, a third flow channel 400 is formed between a fin 004 and an outer tube 100 which are installed between adjacent heat exchanger flat tubes 001. In practical application, a first medium to be cooled or heated is conveyed to the second flow channel 130, a second medium with low temperature or high temperature is conveyed to enter the first flow channel 111, and a third medium with low temperature or high temperature is conveyed to enter the third flow channel 400, heat exchange is performed between the first medium and the second medium in the flowing process, the second medium surrounds the first medium due to the fact that the second flow channel 130 is an annular flow channel, the contact area between the first medium and the second medium is large, and the heat exchange efficiency is high. Meanwhile, the first medium is subjected to heat exchange with the third medium in the flowing process, and the first medium is subjected to heat exchange with the second medium and the third medium at the same time, so that the heat exchange area is increased, and the heat exchange efficiency is greatly improved.

Referring to fig. 1, in the present embodiment, the outer tube 100 is in a flat tube shape, and the size of the outer tube 100 is set as required, which is not specifically limited herein.

In this embodiment, the inner tube 110 is in the shape of a flat tube, and the outer tube 100 is sized as needed, which is not specifically limited herein. In this embodiment, the length of the inner tube 110 is optionally greater than the length of the outer tube 100. It should be understood that in other embodiments, the length of the inner tube 110 may be less than or equal to the length of the outer tube 100. Optionally, a barrier is installed in the lumen of the inner tube 110, the barrier may be, but is not limited to, a rectangular plate, the barrier separates the lumen of the inner tube 110 into a plurality of parallel microchannels, and the number of the barriers is set as required, and is not specifically limited herein.

in this embodiment, the connecting member 120 is a plate, and further, the connecting member 120 is a rectangular plate, and it is apparent that in other embodiments, the connecting member 120 may be a wave-shaped plate, a polygonal-line-shaped plate, and the like. The length of the connector 120 is equal to the length of the outer tube 100. Obviously, in other examples, the length of the connector 120 may be less than the length of the outer tube 100, or the length of the connector 120 may be greater than the length of the inner tube 110.

Referring to fig. 2 and 3, in the flat tube 001 of the heat exchanger provided in this embodiment, the connecting member 120 is located in the second flow channel 130, one side of the connecting member 120 in the width direction is connected to the inner tube wall of the outer tube 100, the other side of the connecting member 120 in the width direction is connected to the outer tube wall of the inner tube 110, the connecting member 120 blocks the second flow channel 130 along the circumferential direction of the inner tube 110 or the outer tube 100, and the lengths of the two sub-channels 131 are equal to the length of the second flow channel 130. It should be appreciated that in other embodiments, the connector 120 may be located outside of the second flow passage 130 or partially extend out of the second flow passage 130.

It should be noted that the number of the connecting members 120 is set as required, for example, the number of the connecting members 120 is one, one connecting member 120 is connected to the inner tube 110 and the outer tube 100, and the second flow path 130 has a blocking position therein. In other embodiments, the number of the connecting members 120 is at least two, at least two connecting members 120 are arranged at intervals along the circumferential direction of the inner tube 110 or the outer tube 100, each connecting member 120 is connected to the inner tube 110 and the outer tube 100, a sub-channel 131 is formed between adjacent connecting members 120, and at least two connecting members 120 separate the second flow channel 130 to form at least two sub-channels 131. When the medium flows in the second flow channel 130, the medium is dispersed in the at least two sub-channels 131, the medium flows more uniformly, and the heat exchange efficiency is higher. In this embodiment, the number of the connecting members 120 is eight, two connecting members 120 are located on both sides of the inner tube 110 in the width direction, the remaining six connecting members 120 are grouped into one group, and the two groups of connecting members 120 are located on both sides of the inner tube 110 in the thickness direction, respectively.

The flat pipe 001 of heat exchanger that this embodiment provided, simple structure is convenient for make processing, and inner tube 110 and outer tube 100 are through two at least connecting piece 120 fixed connection, and the position of inner tube 110 and outer tube 100 is more firm, and the structural strength of flat pipe is higher, and is not fragile. The medium flowing in the second flow channel 130 is wrapped outside the medium flowing in the first flow channel 111, so that the heat exchange area is increased, and the heat exchange efficiency is improved.

Example 2

The present embodiment provides a heat exchange device 01, which comprises the heat exchanger flat tube 001 mentioned in the above embodiment 1.

Referring to fig. 4 to fig. 6, optionally, the heat exchange device 01 provided in this embodiment further includes a first header 002, a second header 003, and fins 004. The heat exchanger flat tube 001 is arranged between the first collecting pipe 002 and the second collecting pipe 003, and the fin 004 is arranged between the adjacent heat exchanger flat tubes 001.

Referring to fig. 7, optionally, the first header 002 includes a first tube body 200, a first partition 210, a blocking plate 220 and two first covers 230.

Optionally, the first pipe body 200 is, for example but not limited to, a cylindrical pipe, the pipe wall of the first pipe body 200 is provided with at least two first installation openings 201, a first inlet 202 and a first outlet 203, the first installation openings 201 are flat openings, the at least two first installation openings 201 are uniformly arranged at intervals along the axial direction of the first pipe body 200, and the at least two first installation openings 201 are located on the same straight line. The first inlet 202 and the first outlet 203 may be, but not limited to, circular ports, and the first inlet 202 and the first outlet 203 are spaced along the axial direction of the first pipe body 200 and are located on the same straight line. The first partition plate 210 is, for example and without limitation, a rectangular plate, the first partition plate 210 is installed in the first tube body 200, the length direction of the first partition plate 210 is parallel to the axis of the first tube body 200, the first partition plate 210 is located in the middle of the first tube body 200, and partitions the first tube body 200 into a first collecting channel 240 and a second collecting channel 250 having substantially semi-cylindrical shapes, the first collecting channel 240 and the second collecting channel 250 are independent of each other, at least two first installation ports 201 are communicated with the second collecting channel 250, and the first inlet port 202 and the first outlet port 203 are communicated with the first collecting channel 240. A first assembly opening 211 is formed in the first partition plate 210 at a position corresponding to the first assembly opening 201, and the first assembly opening 201 and the corresponding first assembly opening 211 are located at the same height and are used for inserting one end of a flat pipe. Each of the first caps 230 is a circular cap, two first caps 230 are respectively connected to two ports of the first pipe body 200 and seal the two ports, an opening is provided on each of the first caps 230, the two openings on the two first caps 230 are respectively set as a second inlet 231 and a second outlet 232, and the second inlet 231 and the second outlet 232 are both communicated with the second collecting channel 250. The blocking plate 220 is, for example, but not limited to, a circular plate, and in order to facilitate installation of the first partition 210, the blocking plate 220 includes two sub-plates having substantially semicircular plates, the two sub-plates are respectively installed at both sides of the first partition 210, both of the two sub-plates are located in the first pipe body 200, the two sub-plates respectively block the first collecting channel 240 and the second collecting channel 250, the first inlet 202 and the first outlet 203 are located at both sides of one sub-plate, and the second inlet 231 and the second outlet 232 are located at both sides of the other sub-plate. Setting that a section of the first collecting channel 240 communicating with the first inlet 202 is a first inflow section 241, and a section of the first collecting channel 240 communicating with the first outlet 203 is a first outflow section 242; a section of the second collecting channel 250 communicating with the second inlet 231 is a second inflow section 251, and a section of the second collecting channel 250 communicating with the second outlet 232 is a second outflow section 252.

Optionally, a connector head 005 is installed at the first inlet 202, and a connector head 005 is installed at the first outlet 203; the second inlet 231 is provided with a connector 005, and the second outlet 232 is provided with a connector 005.

It should be noted that the position of the first partition 210 may not be located at the middle position of the first pipe body 200.

Referring to fig. 8, optionally, the second header 003 includes a second tube body 300, a second partition 310 and two second covers 320.

Optionally, the second tube body 300 is, for example and without limitation, a cylindrical tube, at least two second mounting holes 301 are formed in a tube wall of the second tube body 300, the second mounting holes 301 are flat holes and are used for being matched with the outer tube 100, the at least two second mounting holes 301 are uniformly arranged at intervals along an axial direction of the second tube body 300, and the at least two second mounting holes 301 are located on the same straight line. The second partition plate 310 is, for example and without limitation, a rectangular plate, the second partition plate 310 is installed in the second tube body 300, the length direction of the second partition plate 310 is parallel to the axis of the second tube body 300, the second partition plate 310 is located in the middle of the second tube body 300, and partitions the second tube body 300 into a third collecting channel 330 and a fourth collecting channel 340 which are substantially semi-cylindrical, the third collecting channel 330 and the fourth collecting channel 340 are independent of each other, and at least two second installation ports 301 are communicated with the fourth collecting channel 340. A second assembly opening 311 is formed in the second partition plate 310 at a position corresponding to the second assembly opening 301, and the second assembly opening 301 and the corresponding second assembly opening 311 are located at the same height, so that the other end of the flat pipe can be inserted. Each of the second sealing caps 320 is a circular cap, and the two second sealing caps 320 are respectively connected to two ports of the second pipe body 300 and seal the two ports.

Referring to fig. 9, optionally, the fins 004 are extended in a wave shape, obviously, in other embodiments, the fins 004 may be extended in a zigzag shape, and the like.

referring to fig. 6, in the heat exchange device 01 provided in this embodiment, the number of the heat exchanger flat tubes 001 is at least two. The number of the fins 004 is at least two, it should be noted that only one fin 004 is shown in fig. 6 and 7, and one fin 004 can be installed between any two adjacent outer tubes 100 during actual processing. At least two heat exchanger flat tubes 001 are all installed between first pressure manifold 002 and second pressure manifold 003, and two at least heat exchanger flat tubes 001 are arranged along the even interval of the axis direction of first pressure manifold 002 or second pressure manifold 003, install a fin 004 between two adjacent heat exchanger flat tubes 001, and the outer pipe wall of two outer pipes 100 of two adjacent heat exchanger flat tubes 001 constitutes a plurality of third flow channels 400 of arranging along the length direction of outer pipe 100 with a fin 004. When each heat exchanger flat tube 001 is installed, one end of the heat exchanger flat tube 001 is inserted into the first collecting pipe 002, the other end of the heat exchanger flat tube 001 is inserted into the second collecting pipe 003, specifically, one end of the inner tube 110 of the heat exchanger flat tube 001 passes through the first installing port 201 and then is inserted into the corresponding first assembling port 211, the connecting position of the inner tube 110 and the first clapboard 210 is sealed, one end of the first flow channel 111 of the inner tube 110 is communicated with the first collecting channel 240, one end of the outer tube 100 of the heat exchanger flat tube 001 is installed at the first installing port 201, and the connecting position of the outer tube 100 and the first collecting pipe 002 is sealed, that is, one end of the second flow channel 130 is communicated with the second collecting channel 250, the assembly mode of each heat exchanger flat tube 001 is the same, so that one ends of the plurality of first flow channels 111 are all communicated with the first collecting channel 240 and one ends of the plurality of second flow channels 130 are all communicated with the second collecting channel 250. Meanwhile, the assembly mode of the other end of the heat exchanger flat tube 001 and the second collecting pipe 003 is the same as that of the heat exchanger flat tube 001 and the first collecting pipe 002, after the assembly is finished, the other end of the inner tube 110 penetrates through the second mounting hole 301 and then penetrates through the second mounting hole 311, and the connecting position of the inner tube 110 and the second mounting hole 311 is sealed, so that the other end of the first flow channel 111 is communicated with the third collecting channel 330; the other end of the outer tube 100 is inserted into the second mounting hole 301, the connection position between the outer tube 100 and the second collecting pipe 003 is sealed, and the other end of the second flow passage 130 is communicated with the fourth collecting passage 340. After the installation is completed, the medium can enter from the first inlet 202, sequentially flows to the first inflow section 241, the first flow channel 111 communicated with the first inflow section 241, the third collecting channel 330, the first flow channel 111 communicated with the first outflow section 242, and then flows out from the first outlet 203 communicated with the first outflow section 242, and the circulation path is set as a first circulation path; the medium can enter from the second inlet 231, sequentially flow to the second inflow section 251, the second channel 130 communicated with the second inflow section 251, the fourth collecting channel 340, the second channel 130 communicated with the second outflow section 252, and then flow out from the second outlet 232 communicated with the second outflow section 252, and the circulation path is set as a second circulation path. The medium flows through the third flow channel 400 formed by the fins 004 and the outer tube 100, and this passage is set as a third circulation passage. In practice, different media can flow through the first circulation passage, the second circulation passage and the third circulation passage, a medium to be cooled or heated can flow through the second circulation passage, and the medium can exchange heat with the media in the first circulation passage and the third circulation passage, so that the heat exchange efficiency is high.

in other embodiments, it should be noted that the positions of the first inlet 202 and the first outlet 203 can be interchanged, and the positions of the second inlet 231 and the second outlet 232 can be interchanged and selected as needed.

The heat exchange equipment 01 provided by the embodiment has the advantages of reasonable structure and high heat exchange efficiency.

It should be noted that, for convenience of the drawings, the middle portion of the flat heat exchanger tube 001 shown in fig. 4 and 6 is cut off, that is, the length of the flat heat exchanger tube 001 is selected as required.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The flat tube of the heat exchanger is characterized by comprising an outer tube, an inner tube with a first flow channel and a connecting piece connected to the inner tube and the outer tube, wherein the outer tube is sleeved outside the inner tube, and a second flow channel surrounding the inner tube is formed between the inner tube wall of the outer tube and the outer tube wall of the inner tube.

2. The heat exchanger flat tube according to claim 1, characterized in that the connection piece is located in the second flow channel.

3. The heat exchanger flat tube according to claim 2, wherein the length direction of the connecting member extends along the axial direction of the inner tube or the outer tube, and the connecting member blocks the second flow passage along the circumferential direction of the inner tube or the outer tube.

4. The heat exchanger flat tube according to claim 3, wherein the number of the connecting pieces is at least two, and at least two connecting pieces are arranged at intervals along the circumferential direction of the inner tube or the outer tube to divide the second flow channel into at least two sub-channels.

5. The heat exchanger flat tube according to claim 1, wherein the connector, the inner tube and the outer tube are integrally formed.

6. The heat exchanger flat tube according to claim 1, wherein both ends of the inner tube in the length direction thereof extend out of both ends of the outer tube in the length direction thereof, respectively.

7. Heat exchanger device, characterized in that it comprises heat exchanger flat tubes according to any one of claims 1 to 6.

8. The heat exchange apparatus as claimed in claim 7, further comprising a first header having a first collecting channel and a second collecting channel independent of each other, a second header having a third collecting channel and a fourth collecting channel independent of each other, and a fin; the heat exchanger flat tube is arranged between the first collecting pipe and the second collecting pipe, two ends of the first flow passage are respectively communicated with the first collecting channel and the third collecting channel, and two ends of the second flow passage are respectively communicated with the second collecting channel and the fourth collecting channel; the fins are arranged on the outer tube, and the fins and the outer tube form a third flow passage.

9. A heat exchange apparatus according to claim 8, wherein the first header is provided with a first inlet and a first outlet communicating with the first collecting channel, and a second inlet and a second outlet communicating with the second collecting channel.

10. The heat exchange apparatus as claimed in claim 9, wherein the first header includes a first tube body, a first partition plate and two first covers, the first partition plate is installed in the tube cavity of the first tube body and partitions the first tube body to form the first collecting channel and the second collecting channel, one end of the inner tube sequentially passes through the first tube body and the first partition plate and then communicates with the first collecting channel, and one end of the outer tube sequentially passes through the first tube body and then communicates with the second collecting channel; the two first sealing covers respectively seal two ends of the first pipe body in the length direction, and the second inlet and the second outlet are respectively located on the two first sealing covers.