CN212340012U

CN212340012U - Flow path structure of shell-and-tube heat exchanger

Info

Publication number: CN212340012U
Application number: CN202020897104.8U
Authority: CN
Inventors: 鲍志刚; 王佩卿
Original assignee: Wuxi Xingda Air Conditioning Technology Co ltd
Current assignee: Wuxi Xingda Air Conditioning Technology Co ltd
Priority date: 2020-05-25
Filing date: 2020-05-25
Publication date: 2021-01-12
Anticipated expiration: 2030-05-25

Abstract

The utility model discloses a flow path structure of a shell-and-tube heat exchanger, which at least comprises a group of heat exchange tubes, and each group of heat exchange tubes comprises a first heat exchange tube and at least two second heat exchange tubes; in each group of heat exchange tubes, the first heat exchange tube is simultaneously communicated with the at least two second heat exchange tubes through a tube in the flowing direction of the refrigerant. In this application, cancel the parts such as the pipe case that are used for changing the refrigerant flow direction among the prior art, baffle, directly adopt a pipe fitting to connect first heat exchange tube and the second heat exchange tube in every group heat exchange tube as an organic whole, when the refrigerant flows to second heat exchange tube direction by first heat exchange tube, along with the increase of heat exchange tube quantity, heat transfer area also correspondingly increases, increase the flow area of heat exchange tube simultaneously, in order to avoid forming the gaseous phase along with the continuous evaporation of heat transfer in-process liquid phase refrigerant, the circulation resistance increases, increase power consumption.

Description

Flow path structure of shell-and-tube heat exchanger

Technical Field

The utility model relates to a flow path structure of shell and tube heat exchanger.

Background

A shell and tube heat exchanger is a dividing wall type heat exchanger that utilizes the wall surface of a tube bundle enclosed in a shell as a heat transfer surface. The shell is cylindrical, and a plurality of heat exchange tubes are arranged in the shell; the heat exchange tube is fixed on the tube plate with a hole; the tube plate is externally provided with a tube box and a partition plate, the tube box distributes the refrigerant into each heat exchange tube, and the partition plate in the tube box plays a role in changing the flowing direction of the refrigerant in the tube and increasing the length of the heat exchange tube, so that the refrigerant can be subjected to evaporation or condensation heat exchange in the heat exchange tube continuously.

Because of the structural size limitation of a system where the heat exchanger is located and products, the shell-and-tube heat exchanger makes up for the shortage of tube pass length by changing the flowing direction of a refrigerant in a heat exchange tube for many times through a tube box and the number of added partition plates; the more the tube pass is, the more the tube box, the more the partition plate and the sealing surface are, the complex structure is, and the difficulty is brought to the manufacture; the working pressure of the refrigerant in the tube pass is high, leakage is easy to occur, the requirement on the sealing and the isolation among the tube plate, the tube box and the partition plate is high, and the heat exchanger is complex to manufacture and process and high in cost.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problems, the present invention provides a flow path structure of a shell-and-tube heat exchanger, which at least comprises a set of heat exchange tubes, wherein each set of heat exchange tubes comprises a first heat exchange tube and at least two second heat exchange tubes; in each group of heat exchange tubes, the first heat exchange tube is simultaneously communicated with the at least two second heat exchange tubes through a tube in the flowing direction of the refrigerant.

In this application, cancel the parts such as the pipe case that are used for changing the refrigerant flow direction among the prior art, baffle, directly adopt a pipe fitting to connect first heat exchange tube and the second heat exchange tube in every group heat exchange tube as an organic whole, when the refrigerant flows to second heat exchange tube direction by first heat exchange tube, along with the increase of heat exchange tube quantity, heat transfer area also correspondingly increases, increase the flow area of heat exchange tube simultaneously, in order to avoid forming the gaseous phase along with the continuous evaporation of heat transfer in-process liquid phase refrigerant, the circulation resistance increases, increase power consumption. The manufacturing and sealing requirements of the tube box for increasing the tube pass length and turning back the refrigerant are saved, so that the manufacturing cost of the product is reduced, and in the prior art, the connection mode of the pipelines is mature, so that the connection reliability among the pipelines can be ensured. The material of first heat exchange tube and second heat exchange tube and pipe fitting in this application can be any one of copper, nickel copper, aluminium or stainless steel material.

Further, according to different requirements, the first heat exchange tube comprises a first heat exchange branch tube, or the first heat exchange tube is formed by at least two first heat exchange branch tubes which are sequentially connected, when the first heat exchange tube is formed by at least two first heat exchange branch tubes which are sequentially connected, two adjacent first heat exchange branch tubes are connected together through an elbow;

the second heat exchange tube comprises a second heat exchange branch tube, or the second heat exchange tube is formed by at least two second heat exchange branch tubes which are sequentially connected, and when the second heat exchange tube is formed by at least two second heat exchange branch tubes which are sequentially connected, two adjacent second heat exchange branch tubes are connected together through a first elbow;

the first heat exchange branch pipe is a straight pipe or a U-shaped pipe; the second heat exchange branch pipe is a straight pipe or a U-shaped pipe.

Furthermore, the pipe fitting is provided with one and only one first pipe orifice, and the pipe fitting is provided with at least two second pipe orifices; the first pipe orifice is connected with a first heat exchange pipe, and the second pipe orifice is connected with a second heat exchange pipe.

According to the different quantity of the second heat exchange tubes connected with the same first heat exchange tube, the second tube openings with corresponding quantity are arranged on the tube pieces, so that one second tube opening corresponds to one second heat exchange tube.

In a specific embodiment, the tube bundle heat exchanger further comprises a first tube plate, wherein a tube side inlet hole, a tube side outlet hole, a first tube hole and a second tube hole are formed in the first tube plate;

the two opposite sides of the first tube plate are respectively called an A side and a B side, and the areas of the two opposite sides of the first tube plate are respectively called a first tube plate A side and a first tube plate B side, wherein the A side faces the first tube plate A side, and the B side faces the first tube plate B side;

a tube side inlet hole and a first tube hole are arranged corresponding to each first heat exchange tube;

a tube pass outlet hole and a second tube hole are formed corresponding to each second heat exchange tube;

one end of each first heat exchange tube is inserted into the corresponding tube side inlet hole from the first tube plate A side, and the other end of each first heat exchange tube is inserted into the corresponding first tube hole from the first tube plate A side;

one end of each second heat exchange tube is inserted into the corresponding tube pass outlet hole from the side of the first tube plate A, and the other end of each second heat exchange tube is inserted into the corresponding second tube hole from the side of the first tube plate A;

the pipe fitting is positioned on the side of the first pipe plate B;

the end surface of one end of the first heat exchange tube inserted into the tube side inlet hole is accommodated in the tube side inlet hole or is flush with or extends out of the side surface B;

the end surface of one end of the first heat exchange tube inserted into the first tube hole extends out of the side surface B;

the end surface of one end of the second heat exchange tube inserted into the tube side outlet hole is accommodated in the tube side outlet hole or is flush with or extends out of the side surface B;

the end surface of one end of the second heat exchange tube inserted into the second tube hole extends out of the side surface B.

In the technical scheme, the shell used for installing the heat exchanger is formed into the heat exchange cavity on the side of the first tube plate A, and the tube is arranged on the side of the first tube plate B.

In another embodiment, the device further comprises a first tube plate, wherein a tube side inlet hole and a tube side outlet hole are arranged on the first tube plate;

a tube side inlet hole is arranged corresponding to each first heat exchange tube;

a tube pass outlet hole is formed corresponding to each second heat exchange tube;

one end of each first heat exchange tube is inserted into the corresponding tube side inlet hole from the side of the first tube plate A, and the other end of each first heat exchange tube is positioned on the side of the first tube plate A;

one end of each second heat exchange tube is inserted into the corresponding tube pass outlet hole from the side of the first tube plate A, and the other end of each second heat exchange tube is positioned on the side of the first tube plate A;

the pipe fittings are positioned on the side of the first pipe plate A;

the end face of one end of the second heat exchange tube inserted into the tube side outlet hole is accommodated in the tube side outlet hole or is flush with or extends out of the side face B.

In the technical scheme, the shell used for installing the heat exchanger is formed into the heat exchange cavity on the side of the first tube plate A, and the connecting parts of the tube and each heat exchange tube are located on the side of the first tube plate A after the tube is arranged on the side of the first tube plate A, so that the number of holes formed in the first tube plate is reduced, and the leakage rate of the heat exchanger is favorably reduced.

In another embodiment, the tube plate comprises a first tube plate and a second tube plate, wherein the first tube plate and the second tube plate are arranged at intervals along an axial direction and are parallel to each other;

the first tube plate is provided with a tube side inlet hole, a first tube hole and a second tube hole; a tube pass outlet hole is formed in the second tube plate;

the area between the first tube plate and the second tube plate is called an intermediate area, the space of the first tube plate on the side away from the intermediate area is called a first outer side, the space of the second tube plate on the side away from the intermediate area is called a second outer side, the side of the first tube plate facing the first outer side is called a first outer side, and the side of the second tube plate facing the second outer side is called a second outer side;

one end of each first heat exchange tube is inserted into the corresponding tube side inlet hole from the middle area, and the other end of each first heat exchange tube is inserted into the corresponding first tube hole from the middle area;

one end of each second heat exchange tube is inserted into the corresponding tube side outlet hole from the middle area, and the other end of each second heat exchange tube is inserted into the corresponding second tube hole from the middle area;

the pipe fitting is positioned on the first outer side;

the end surface of one end of the first heat exchange tube inserted into the tube pass inlet hole is accommodated in the tube pass inlet hole or is flush with or extends out of the first outer side surface;

the end surface of one end of the first heat exchange tube inserted into the first tube hole extends out of the first outer side surface;

the end surface of one end of the second heat exchange tube inserted into the tube side outlet hole is accommodated in the tube side outlet hole or is flush with or extends out of the second outer side surface;

the end surface of one end of the second heat exchange tube inserted into the second tube hole extends out of the first outer side surface.

In the technical scheme, the shell used for installing the heat exchanger between the first tube plate and the second tube plate forms a heat exchange cavity, and after the tube is arranged on the first outer side, the first outer side has a larger operation space, so that the welding of the tube and the corresponding heat exchange tube is facilitated, and the maintenance of the subsequent heat exchanger in use is facilitated.

In another embodiment, the tube further comprises a first tube plate and a second tube plate, wherein the first tube plate and the second tube plate are arranged along an axis at intervals and are parallel to each other;

a tube pass inlet hole is formed in the first tube plate, and a tube pass outlet hole is formed in the second tube plate;

one end of each first heat exchange tube is inserted into the corresponding tube side inlet hole from the middle area, and the other end of each first heat exchange tube is positioned in the middle area;

one end of each second heat exchange tube is inserted into the corresponding tube side outlet hole from the middle area, and the other end of each second heat exchange tube is positioned in the middle area;

the pipe fitting is positioned in the middle area;

the end face of one end of the second heat exchange tube inserted into the tube side outlet hole is accommodated in the tube side outlet hole or is flush with or extends out of the second outer side face.

In the technical scheme, the shell used for installing the heat exchanger between the first tube plate and the second tube plate is formed into the heat exchange cavity, and after the tube is arranged in the middle area, the connecting part of the tube and each heat exchange tube is located in the middle area, so that the number of the holes in the first tube plate and the second tube plate is reduced, and the leakage rate of the heat exchanger is favorably reduced.

Furthermore, the shell-and-tube heat exchanger is provided with a first tube plate and a shell connected to the first tube plate, the inner cavity of the shell is formed into a heat exchange cavity, the first elbow is positioned in the heat exchange cavity or outside the heat exchange cavity, and the second elbow is positioned in the heat exchange cavity or outside the heat exchange cavity;

when the first elbow is positioned outside the heat exchange cavity, one end of each of the two first heat exchange branch pipes connected with the first elbow, which has the same orientation, penetrates through the first tube plate from inside to outside and is connected with the first elbow after exceeding the first tube plate outwards;

when the second elbow is positioned outside the heat exchange cavity, one end, which faces the same direction, of each of the two second heat exchange branch pipes connected with the second elbow penetrates through the first tube plate from inside to outside and exceeds the first tube plate outwards to be connected with the second elbow.

Different schemes can be selected according to different requirements.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a second embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a third embodiment of the present invention.

Fig. 4 is a schematic structural diagram of a fourth embodiment of the present invention.

Fig. 5 is a first schematic view of a tube.

Fig. 6 is a second schematic view of the tube.

Fig. 7 is a third schematic view of the tube.

Fig. 8 is a fourth schematic view of the tube.

Fig. 9 is a fifth schematic view of the tube.

Fig. 10 is a sixth schematic view of the tube.

FIG. 11 is a seventh schematic view of the tube

Detailed Description

Example 1

Referring to fig. 1, the flow path structure of the first shell-and-tube heat exchanger includes two sets of heat exchange tubes, a first tube sheet i 11, a first group a of heat exchange tubes 12 and a second group a of heat exchange tubes 14. Two sets of heat exchange tubes all include a first heat exchange tube I and two second heat exchange tubes I, wherein:

the first group A of heat exchange tubes 12 includes a first heat exchange tube IA 121, and two second heat exchange tubes IA 124 and IB 125. The second group A of heat exchange tubes 14 includes a first heat exchange tube IB 141, and second heat exchange tubes IC 144 and ID 145, two second heat exchange tubes I.

A tube side inlet hole, a tube side outlet hole, a first tube hole and a second tube hole are formed in the first tube plate I.

The two opposite sides of the first tube plate i are respectively referred to as an a-side i 118 and a B-side i 119, and the regions of the two opposite sides of the first tube plate i are respectively referred to as a first tube plate a-side and a first tube plate B-side, wherein the a-side i faces the first tube plate a-side, and the B-side i faces the first tube plate B-side. In fig. 1, the right side area of the first tube sheet i is the first tube sheet a side, and the left side area of the first tube sheet i is the first tube sheet B side.

On the first tube sheet I, corresponding to each first heat exchange tube I, a tube side inlet hole I111 and a first tube hole I112 are arranged. And a tube side outlet hole I114 and a second tube hole I113 are arranged corresponding to each second heat exchange tube I.

In each group of heat exchange tubes, one end of the first heat exchange tube I is simultaneously communicated with two second heat exchange tubes I through a tube I129. Referring to fig. 5, in the present embodiment, the pipe member i 129 includes a first pipe section i 122 and two second pipe sections i 123, one end of the first pipe section i 122 is formed as a first pipe orifice i 1221, one ends of the two second pipe sections i 123 are both communicated with the other end of the first pipe section i 122, and the other end of each second pipe section i 123 is formed as a second pipe orifice i 1231. The fluid entering the first pipe section part I122 is divided into two parts, and the two parts enter the two second heat exchange pipes I through the two second pipe section parts I123 respectively.

The connection structure of each group of heat exchange tubes will be described below by taking the first group a of heat exchange tubes 12 as an example. In this embodiment, the first heat exchange tube ia 121, the second heat exchange tube ia 124 and the second heat exchange tube ib 125 are all U-shaped tubes.

One end of the first heat exchange tube IA 121 is inserted into the corresponding tube side inlet hole I111 from the side A of the first tube plate, and the end surface of the end is flush with the side surface I119B. The other end of the first heat exchange tube ia 121 is inserted into the corresponding first tube hole i 112 from the first tube plate a side and protrudes out of the B-side surface i 119.

One end of each second heat exchange tube I is inserted into the corresponding tube pass outlet hole I114 from the side A of the first tube plate, and the end face of the end is flush with the side B face I119. The other end of each second heat exchange tube I is inserted into the corresponding second tube hole I113 from the side A of the first tube plate and extends out of the side B surface I119.

The tube member I129 is located on the first tube sheet B side. One ends of the two second heat exchange tubes I, which extend out of the side surface B I119, are respectively connected to a second tube opening I1231 of a second tube section part I123; the end of the first heat exchange tube IA 121 extending out of the side surface I119 is connected to a first tube opening I1221 of the first tube section part I122.

The connection structure of the second group a of heat exchange tubes 14 is the same as that of the first group a of heat exchange tubes 12, and will not be described in detail.

Each heat exchange tube is connected with a baffle plate I15.

In the present embodiment, two sets of heat exchange tubes are shown by way of example, and it is understood that in other embodiments, there may be only one set of heat exchange tubes, or there may be three sets of heat exchange tubes, and of course, there may be four sets, eight sets, fifteen sets or more sets of heat exchange tubes.

In this embodiment, a first heat exchange tube I communicates two second heat exchange tubes I, can understand, in other embodiments, a first heat exchange tube I can also communicate three or more second heat exchange tubes I simultaneously.

In each group of heat exchange tubes, along the flowing direction of the refrigerant, the first heat exchange tube I is simultaneously communicated with the two second heat exchange tubes I through the tube I. Or in each group of heat exchange tubes, along the flowing direction of the refrigerant, the first heat exchange tube I is simultaneously communicated with at least two second heat exchange tubes I through the tube I.

In this embodiment, the end surface of the first heat exchange tube ia 121 inserted into the tube side inlet hole i 111 is flush with the side surface i 119B. The end face of one end of each second heat exchange tube I inserted into the tube side outlet hole I114 is flush with the B side face I119.

It is understood that in other embodiments, the end face of the end of the first heat exchange tube ia 121 inserted into the tube side inlet port i 111 may be received in the tube side inlet port i 111 or may extend outwardly beyond the B side face. The end face of one end of each second heat exchange tube i inserted into the tube side outlet hole i 114 can also be accommodated in the tube side outlet hole i 114 or extend outward beyond the B side face.

In this embodiment, the first heat exchange tube only shows one first heat exchange branch tube, and it can be understood that in other embodiments, two, three or more first heat exchange branch tubes are formed by sequentially connecting the first elbows;

in this embodiment, the second heat exchange tube only shows one second heat exchange branch tube, and it is understood that in other embodiments, two, three or more second heat exchange branch tubes may be formed by sequentially connecting the second elbows.

Example 2

Referring to fig. 2, the flow path structure of the second shell-and-tube heat exchanger includes two sets of heat exchange tubes, namely a first group B of heat exchange tubes 32 and a second group B of heat exchange tubes 34, and a first tube sheet ii 31. Two sets of heat exchange tubes all include a first heat exchange tube II and two second heat exchange tubes II, wherein:

the first group A of heat exchange tubes 32 comprises a first heat exchange tube IIA 321, a second heat exchange tube IIA 324 and a second heat exchange tube IIB 325 and two second heat exchange tubes II. The second group a of heat exchange tubes 34 includes a first heat exchange tube ib 341, a second heat exchange tube ic 344, and a second heat exchange tube id 345.

And a tube side inlet hole and a tube side outlet hole are formed in the first tube plate II.

The two opposite sides of the first tube sheet ii are respectively referred to as an a-side ii 318 and a B-side ii 319, and the regions of the two opposite sides of the first tube sheet ii are respectively referred to as a first tube sheet a-side and a first tube sheet B-side, wherein the a-side ii faces the first tube sheet a-side and the B-side ii faces the first tube sheet B-side. In fig. 2, the right side area of the first tube sheet ii is the first tube sheet a side, and the left side area of the first tube sheet ii is the first tube sheet B side.

And a tube side inlet hole II 311 is formed in each first tube plate II corresponding to each first heat exchange tube II. And a tube pass outlet hole II 313 is formed corresponding to each second heat exchange tube II.

In each group of heat exchange tubes, one end of the first heat exchange tube II is simultaneously communicated with two second heat exchange tubes II through a pipe II 329. In this embodiment, this pipe fitting II 329 includes a first pipe section II 322 and two second pipe section II 323, and the one end of this first pipe section II 322 forms first mouth of pipe II, and the one end of these two second pipe section II 323 all communicates the other end of first pipe section II 322, and the other end of every second pipe section II 323 all forms a second mouth of pipe II. The fluid entering the first pipe section II 322 is divided into two parts and enters the two second heat exchange pipes II through the two second pipe section II 323. The structure of the pipe II 329 is similar to that of the pipe I129, and particularly, refer to FIG. 5.

The connection structure of each group of heat exchange tubes will be described below by taking the first group B of heat exchange tubes 32 as an example. In this embodiment, the first heat exchange tube iia 321, the second heat exchange tube iia 324, and the second heat exchange tube iib 325 are U-shaped tubes.

One end of the first heat exchange tube IIA 321 is inserted into the corresponding tube side inlet hole II 311 from the side of the first tube plate A, and the end face of the end is flush with the side face II 319B. The other end of the first heat exchange tube IIA 321 is positioned on the side of the first tube plate A.

One end of each second heat exchange tube II is inserted into the corresponding tube pass outlet hole II 313 from the side of the first tube plate A, and the end face of the end is flush with the side face II 319B. The other end of each second heat exchange tube II is positioned on the side of the first tube plate A.

The pipe II 329 is positioned on the side of the first tube plate A, and one ends of the two second heat exchange tubes II, which are positioned on the side of the first tube plate A, are respectively connected to a second pipe orifice II of a second tube section part II 323; one end of the first heat exchange tube IIA 321, which is positioned on the side of the first tube plate A, is connected to a first tube opening II of the first tube section part II 322.

The connection structure of the second group B of heat exchange tubes 34 is the same as that of the first group B of heat exchange tubes 32, and thus, the description thereof is omitted.

And a baffle plate II 35 is connected to each heat exchange tube.

In this embodiment, a first heat exchange tube II communicates two second heat exchange tubes II, and it can be understood that in other embodiments, a first heat exchange tube II can also communicate three or more second heat exchange tubes II simultaneously.

In each group of heat exchange tubes, the first heat exchange tube II is simultaneously communicated with two second heat exchange tubes II through the tube II along the flowing direction of the refrigerant. Or in each group of heat exchange tubes, the first heat exchange tube II is communicated with at least two second heat exchange tubes II simultaneously through the tube II along the flowing direction of the refrigerant.

In this embodiment, the end surface of the end of the first heat exchange tube iia 321 inserted into the tube side inlet hole ii 311 is flush with the B side surface ii 319. The end surface of one end of each second heat exchange tube II, which is inserted into the tube pass outlet hole II 313, is flush with the side surface II 319B.

It is understood that in other embodiments, the end surface of the end of the first heat exchange tube iia 321 inserted into the tube side inlet hole ii 311 may also be accommodated in the tube side inlet hole ii 311, or extend outward beyond the B side surface. The end face of one end of each second heat exchange tube II inserted into the tube side outlet hole II 313 can also be accommodated in the tube side outlet hole II 313 or extend outwards from the side B.

Example 3

Referring to fig. 3, the flow path structure of the third shell-and-tube heat exchanger includes two sets of heat exchange tubes, a first tube plate iii 21 and a second tube plate iii 29, where the two sets of heat exchange tubes are the first C set of heat exchange tubes 22 and the second C set of heat exchange tubes 24, respectively. Two sets of heat exchange tubes all include a first heat exchange tube III and two second heat exchange tubes III, wherein:

the first group C of heat exchange tubes 22 comprises a first heat exchange tube IIIA 221, a second heat exchange tube IIIA 224, a second heat exchange tube IIIB 225 and two second heat exchange tubes III. The second group C of heat exchange tubes 24 comprises a first heat exchange tube IIIB 241, a second heat exchange tube IIIC 244 and a second heat exchange tube IIID 245 and two second heat exchange tubes III.

The first tube plate III 21 and the second tube plate III 29 are arranged at intervals along the first axis X direction and are parallel to each other.

A tube side inlet hole, a first tube hole and a second tube hole are formed in the first tube plate III 21; a tube-side outlet hole is provided in the second tube sheet iii 29.

The region between the first tube plate iii 21 and the second tube plate iii 29 is referred to as an intermediate region, the space on the side of the first tube plate iii 21 facing away from the intermediate region is referred to as a first outer side, the space on the side of the second tube plate iii 29 facing away from the intermediate region is referred to as a second outer side, the side of the first tube plate iii 21 facing the first outer side is referred to as a first outer side face iii 219, and the side of the second tube plate iii 29 facing the second outer side is referred to as a second outer side face iii 298. In fig. 3, the left side of the first tube plate iii 21 is a first outer side, and the right side of the second tube plate iii 29 is a second outer side.

A tube side inlet hole iii 211 and a first tube hole iii 212 are provided corresponding to each first heat exchange tube iii. And a tube side outlet hole 291 and a second tube hole III 213 are arranged corresponding to each second heat exchange tube III.

In each group of heat exchange tubes, the first heat exchange tube III is simultaneously communicated with the two second heat exchange tubes III through a tube III 229.

In this embodiment, the pipe member iii 229 includes a first pipe section iii 222 and two second pipe sections iii 223, one end of the first pipe section iii 222 is formed as a first pipe opening iii, one ends of the two second pipe sections iii 223 are communicated with the other end of the first pipe section iii 222, and the other end of each second pipe section iii 223 is formed as a second pipe opening iii. The fluid entering the first pipe section part III 222 is divided into two parts and enters the two second heat exchange pipes III through the two second pipe section parts III 223 respectively. The structure of the pipe member III 229 is similar to that of the pipe member I129, and reference is made to FIG. 5.

The connection structure of each group of heat exchange tubes is described below by taking the first C groups of heat exchange tubes 22 as an example. In this embodiment, the first heat exchanging pipe iiia 221 is a U-shaped pipe, and the second heat exchanging pipe iiia 224 and the second heat exchanging pipe iiib 225 are both straight pipes.

One end of the first heat exchange tube IIIA 221 is inserted into the corresponding tube side inlet hole III 211 from the middle area, and the end surface of the end is flush with the first outer side surface III 219. The other end of the first heat exchange tube IIIA 221 is inserted into the corresponding first tube hole III 212 from the middle region and extends out of the first outer side surface III 219.

One end of each second heat exchange tube III is inserted into the corresponding second tube hole III 213 from the middle area and extends out of the first outer side surface III 219. The other end of each second heat exchange tube III is inserted into the corresponding tube side outlet hole III 291 from the middle area, and the end face of the end is flush with the second outer side face III 298.

The pipe fittings III 229 are positioned on the first outer side, and one ends of the two second heat exchange pipes III, which extend out of the first outer side surface III 219, are respectively connected to a second pipe orifice III of a second pipe section part III 223; one end of the first heat exchange tube IIIA 221, which is positioned on the first outer side, is connected to a first tube opening III of the first tube section part III 222.

The connection structure of the second C group heat exchange tubes 24 is the same as that of the first C group heat exchange tubes 22, and thus, the description thereof is omitted.

And a baffle plate III 25 is connected to each heat exchange tube.

In this embodiment, one first heat exchange tube iii communicates two second heat exchange tubes iii, and it can be understood that, in other embodiments, one first heat exchange tube iii can also communicate three or more second heat exchange tubes iii simultaneously.

Namely, in each group of heat exchange tubes, the first heat exchange tube III is simultaneously communicated with two second heat exchange tubes III through the tube III along the flowing direction of the refrigerant. Or in each group of heat exchange tubes, the first heat exchange tube III is simultaneously communicated with at least two second heat exchange tubes III through the tube III along the flowing direction of the refrigerant.

In this embodiment, the end surface of the first heat exchange tube iiia 221 inserted into the tube side inlet hole iii 211 is flush with the first outer side surface iii 219. The end face of one end of each second heat exchange tube III inserted into the tube side outlet hole III 291 is flush with the second outer side face III 298.

It will be appreciated that in other embodiments, the end face of the first heat exchange tube iiia 221 inserted into the tube side inlet port iii 211 may also be received in the tube side inlet port iii 211 or may extend outwardly beyond the first outer side face. The end face of the end of each second heat exchange tube iii inserted into the tube side outlet hole iii 291 may be further accommodated in the tube side outlet hole iii 291 or may protrude outward from the second outer side face.

Example 4

Referring to fig. 4, the flow path structure of the fourth shell-and-tube heat exchanger includes two sets of heat exchange tubes, a first tube plate iv 41 and a second tube plate iv 49, where the two sets of heat exchange tubes are the first D set of heat exchange tubes 42 and the second D set of heat exchange tubes 44, respectively. The two groups of heat exchange tubes comprise a first heat exchange tube IV and two second heat exchange tubes IV, wherein:

the first group D of heat exchange tubes 22 comprises a first heat exchange tube iva 421, and second heat exchange tubes iva 424 and ivb 425, two second heat exchange tubes iv. The second group D of heat exchange tubes 24 includes a first heat exchange tube IVB 441, and second heat exchange tubes IVC 444 and second heat exchange tubes IVD 445, two second heat exchange tubes IV.

The first tube plate IV 41 and the second tube plate IV 49 are arranged at intervals along the second axis Y direction and are parallel to each other.

A tube side inlet hole is formed in the first tube plate IV 41; a tube side outlet hole is arranged on the second tube plate iv 49.

The region between the first tube sheet iv 41 and the second tube sheet iv 49 is referred to as the middle area, the space on the side of the first tube sheet iv 41 facing away from the middle area is referred to as the first outer side, the space on the side of the second tube sheet iv 49 facing away from the middle area is referred to as the second outer side, the side of the first tube sheet iv 41 facing the first outer side is referred to as the first outer side face iv 419, and the side of the second tube sheet iv 49 facing the second outer side is referred to as the second outer side face iv 498. In fig. 4, the left side of the first tube sheet iv 41 is a first outer side, and the right side of the second tube sheet iv 49 is a second outer side.

A tube side inlet hole IV 411 is arranged corresponding to each first heat exchange tube IV. A tube pass outlet hole iv 491 is provided corresponding to each second heat exchange tube iv.

In each group of heat exchange tubes, the first heat exchange tube IV is simultaneously communicated with the two second heat exchange tubes IV through a tube IV 429.

In this embodiment, the pipe iv 429 includes a first pipe section iv 422 and two second pipe sections iv 423, one end of the first pipe section iv 422 is formed as a first pipe orifice iv, one ends of the two second pipe sections iv 423 are communicated with the other end of the first pipe section iv 422, and the other end of each second pipe section iv 423 is formed as a second pipe orifice iv. The fluid entering the first tube section part IV 422 is divided into two parts and enters the two second heat exchange tubes IV through the two second tube section parts IV 423 respectively. The structure of the pipe IV 429 is similar to that of the pipe I129, and particularly, refer to FIG. 5.

The connection structure of each group of heat exchange tubes will be described below by taking the first D groups of heat exchange tubes 42 as an example. In this embodiment, the first heat exchanging tube iva 421 is a U-shaped tube, and the second heat exchanging tube iva 424 and the second heat exchanging tube ivb 425 are both a straight tube.

One end of the first heat exchange tube IVA 421 is inserted into the corresponding tube side inlet hole IV 411 from the middle area, and the end surface of the end is flush with the first outer side surface IV 419. The other end of the first heat exchange tube iva 421 is located in the middle region.

One end of each second heat exchange tube IV is inserted into the corresponding tube pass outlet hole IV 491 from the middle area, and the end face of the end is flush with the second outer side face IV 498. The other end of each second heat exchange tube IV is positioned in the middle area.

The tubular IV 429 is located in the middle zone. One ends of the two second heat exchange tubes IV, which are positioned in the middle area, are respectively connected to a second tube opening IV of one second tube section part IV 423; one end of the first heat exchange tube IVA 421 located in the middle zone is connected to the first tube orifice IV of the first tube section part IV 422.

The connection structure of the second C group heat exchange tubes 44 is the same as that of the first C group heat exchange tubes 42, and thus, the description thereof is omitted.

And each heat exchange tube is connected with a baffle plate IV 45.

In this embodiment, one first heat exchange tube iv communicates with two second heat exchange tubes iv, and it can be understood that in other embodiments, one first heat exchange tube iv may also communicate with three or more second heat exchange tubes iv at the same time.

Namely, in each group of heat exchange tubes, along the flowing direction of the refrigerant, the first heat exchange tube IV is simultaneously communicated with two second heat exchange tubes IV through a tube IV. Or in each group of heat exchange tubes, the first heat exchange tube IV is simultaneously communicated with at least two second heat exchange tubes IV through the tube IV along the flowing direction of the refrigerant.

In this embodiment, the end surface of the first heat exchange tube iva 421 inserted into the tube side inlet hole iv 411 is flush with the first outer side surface iv 419. The end face of one end of each second heat exchange tube IV inserted into the tube pass outlet hole IV 491 is flush with the second outer side face IV 498.

It is understood that in other embodiments, the end surface of the end of the first heat exchange tube iva 421 inserted into the tube side inlet hole iv 411 may also be accommodated in the tube side inlet hole iv 411 or protrude outward beyond the first outer side surface. The end face of one end of each second heat exchange tube iv inserted into the tube side outlet hole iv 491 can also be accommodated in the tube side outlet hole iv 491 or project outwards from the second outer side face.

In the above embodiments, one first heat exchange tube is connected to two second heat exchange tubes by using the tube shown in fig. 5. It is understood that in other embodiments, one first heat exchange tube may also employ the tube member shown in fig. 6 or fig. 7 to connect two second heat exchange tubes according to different structures. Or one first heat exchange pipe may be connected to three second heat exchange pipes by using the pipe member shown in fig. 8. Or one first heat exchange tube may also employ the tube member shown in fig. 9, 10 or 11 to connect four second heat exchange tubes.

Claims

1. A flow path structure of a shell-and-tube heat exchanger is characterized in that,

the heat exchanger at least comprises a group of heat exchange tubes, and each group of heat exchange tubes comprises a first heat exchange tube and at least two second heat exchange tubes;

in each group of heat exchange tubes, the first heat exchange tube is simultaneously communicated with the at least two second heat exchange tubes through a tube in the flowing direction of the refrigerant.

2. The flow path structure according to claim 1,

the first heat exchange tube comprises a first heat exchange branch tube, or the first heat exchange tube is formed by at least two first heat exchange branch tubes which are sequentially connected, and when the first heat exchange tube is formed by at least two first heat exchange branch tubes which are sequentially connected, two adjacent first heat exchange branch tubes are connected together through a first elbow;

the second heat exchange tube comprises a second heat exchange branch tube, or the second heat exchange tube is formed by at least two second heat exchange branch tubes which are sequentially connected, and when the second heat exchange tube is formed by at least two second heat exchange branch tubes which are sequentially connected, two adjacent second heat exchange branch tubes are connected together through a second elbow;

the first heat exchange branch pipe is a straight pipe or a U-shaped pipe;

the second heat exchange branch pipe is a straight pipe or a U-shaped pipe.

3. The flow path structure according to claim 1,

the pipe fitting is provided with one and only one first pipe orifice, and the pipe fitting is provided with at least two second pipe orifices; the first pipe orifice is connected with a first heat exchange pipe, and the second pipe orifice is connected with a second heat exchange pipe.

4. The flow path structure according to claim 1 or 2,

the tube side inlet hole, the tube side outlet hole, the first tube hole and the second tube hole are formed in the first tube plate;

the pipe fitting is positioned on the side of the first pipe plate B;

5. The flow path structure according to claim 1 or 2,

the tube side inlet hole and the tube side outlet hole are formed in the first tube plate;

the pipe fittings are positioned on the side of the first pipe plate A;

6. The flow path structure according to claim 1 or 2,

the first tube plate and the second tube plate are arranged at intervals along an axial direction and are parallel to each other;

the pipe fitting is positioned on the first outer side;

7. The flow path structure according to claim 1 or 2,

the first tube plate and the second tube plate are arranged at intervals along an axis and are mutually parallel;

the pipe fitting is positioned in the middle area;

8. The flow path structure according to claim 2,

the shell-tube heat exchanger is provided with a first tube plate and a shell connected to the first tube plate, the inner cavity of the shell forms a heat exchange cavity, the first elbow is positioned in the heat exchange cavity or outside the heat exchange cavity, and the second elbow is positioned in the heat exchange cavity or outside the heat exchange cavity;