CN107687787B

CN107687787B - Heat exchange device

Info

Publication number: CN107687787B
Application number: CN201610634384.1A
Authority: CN
Inventors: 不公告发明人
Original assignee: Hangzhou Sanhua Research Institute Co Ltd
Current assignee: Hangzhou Sanhua Research Institute Co Ltd
Priority date: 2016-08-03
Filing date: 2016-08-03
Publication date: 2021-03-19
Anticipated expiration: 2036-08-03
Also published as: CN107687787A

Abstract

A heat exchange device comprises a shell with an opening on one side and a heat exchange core body, and further comprises a connecting block, wherein the connecting block is provided with a first channel, a second channel, a first interface communicated with the first channel and a second interface communicated with the second channel, the connecting block is further provided with a first socket hole of the first channel corresponding to the first channel and a first socket hole of the second channel corresponding to the second channel, the heat exchange core body comprises at least one flat tube, at least one part of one end of the flat tube extends into the first socket hole of the first channel and is in sealing installation with the first socket hole of the first channel, the first channel is communicated with the first fluid channel, at least one part of the other end of the flat tube extends into the first socket hole of the second channel and is in sealing installation with the first socket hole of the second channel, and the second channel is communicated with the first fluid channel. The heat exchange device has the advantages of simple processing and installation, light weight, low cost and better pressure resistance.

Description

Heat exchange device

[ technical field ] A method for producing a semiconductor device

The invention relates to heat exchange equipment, in particular to a heat exchange device.

[ background of the invention ]

CO2 is a novel environment-friendly refrigeration working medium, can reduce global greenhouse effect, fundamentally solves the problem of pollution of compounds to the environment, and has good economical efficiency and practicability. The compression type refrigeration cycle system using CO2 as a working medium can be applied to most refrigeration/heating fields.

However, the working pressure of the CO2 refrigeration system is high, the characteristic of the system needs to be fully considered when designing the CO2 heat exchange device, and the component design is still not mature, so that the system is not widely applied. Generally speaking, the CO2 heat exchange device mainly comprises a tube fin type, a micro-channel type, a plate type, a shell-and-tube type, a plate fin type, a sleeve type and the like. Wherein the plate type and plate fin type manufacturing process is complex, and the wall thickness of the tube fin type, sleeve type and shell-and-tube type tubes needs to be thicker, thereby wasting materials.

And the traditional CO2 micro-channel heat exchange device adopts a mode of forced convection of refrigerant and air for heat exchange, so that the efficiency is low. Although the difference between the physical properties of liquid and air is large, the liquid-gas heat exchange has high heat exchange efficiency, but the liquid-gas heat exchange device in the prior art generally has the problems that the wall thickness of a circulating pipe is thick and the heat exchange performance is poor due to uneven fluid distribution in order to resist high pressure.

Therefore, how to provide a heat exchange device suitable for a relatively high-pressure refrigerant system and having a better heat exchange performance is a technical problem to be solved.

[ summary of the invention ]

In order to solve the technical problems, the invention adopts the following technical scheme: a heat exchange device comprises a shell and a heat exchange core body, wherein a cavity is formed in the shell, part or all of the heat exchange core body is accommodated in the cavity, the shell is further provided with a third interface and a fourth interface, the third interface and the fourth interface are communicated with the cavity, a first fluid channel is formed in the heat exchange core body and is isolated from the cavity, and the heat exchange device further comprises a connecting block, wherein the connecting block is provided with a first channel, a second channel, a first interface communicated with the first channel and a second interface communicated with the second channel;

the heat exchange core body comprises at least one flat tube, at least one part of the first fluid channel is positioned in the flat tube, at least one part of one end of the flat tube extends into the first socket hole of the first channel and is in sealing installation with the first socket hole of the first channel, the first channel is communicated with the first fluid channel, at least one part of the other end of the flat tube extends into the first socket hole of the second channel and is in sealing installation with the first socket hole of the second channel, and the second channel is communicated with the first fluid channel.

The connecting block comprises a first connecting block and a second connecting block, the first channel and the second channel are arranged on the second connecting block, the first channel and the second channel are recessed in one side face, opposite to the first connecting block, of the second connecting block, the first channel comprises a first straight channel, a second straight channel and a bending portion located between the first straight channel and the second straight channel, the second channel also comprises a first straight channel, a second straight channel and a bending portion located between the first straight channel and the second straight channel, at least one part of one end, extending into the first bearing hole of the first channel, of the flat tube extends into the first straight channel of the first channel or is communicated with the first straight channel of the first channel, and at least one part of one end, extending into the first bearing hole of the second channel, of the flat tube extends into the first straight channel of the second channel or is communicated with the first straight channel of the second channel (ii) a

The depth of the first socket hole is more than or equal to 2 mm. .

The first channel further comprises a bubble-shaped end part, the bubble-shaped end part is located at one end, away from the bending part of the first channel, of the second straight channel of the first channel, the bubble-shaped end part is located at one end, away from the bending part of the second channel, of the second straight channel of the second channel, the inner diameter or equivalent inner diameter of the bubble-shaped end part of the first channel is larger than the drift diameter of the second straight channel of the first channel, and the inner diameter or equivalent inner diameter of the bubble-shaped end part of the second channel is larger than the drift diameter of the second straight channel of the second channel.

The bubble end of the first channel is opposite to the first interface, the bubble end of the second channel is opposite to the second interface, the inner diameter or equivalent inner diameter of the bubble end of the first channel is larger than or equal to that of the bubble end part of the first interface close to the first channel, and the inner diameter or equivalent inner diameter of the bubble end of the second channel is larger than or equal to that of the bubble end part of the second interface close to the second channel.

The first interface and the second interface are stepped holes, the first interface comprises a small-diameter part close to the second connecting block side and a large-diameter part far away from the second connecting block side, the inner diameter or equivalent inner diameter of the bubble-shaped end part of the first channel is larger than or equal to the small-diameter part of the first interface, the second interface comprises a small-diameter part close to the second connecting block side and a large-diameter part far away from the second connecting block side, and the inner diameter or equivalent inner diameter of the bubble-shaped end part of the second channel is larger than or equal to the small-diameter part of the second interface.

The heat exchange device further comprises a mounting plate, one side of the shell is open, the mounting plate covers the one side of the shell and is fixedly mounted with the shell, the connecting block is fixedly mounted with the mounting plate, the mounting plate is provided with a second socket hole opposite to the first socket hole, the flat tube is hermetically mounted with the first socket hole and the second socket hole by welding, and the depth of the second socket hole is more than or equal to 2 mm;

still be provided with the sealing member between mounting panel and the casing, the mounting panel with casing contact part is provided with and is used for the installation the sealing member recess of sealing member, the mounting panel still is provided with and is used for the installation heat exchange device's mounting hole. 7. The heat exchange device according to claim 1, wherein the shell is open at one side, the connecting block covers the open at one side of the shell and is fixedly installed with the shell, and the flat tube and the first socket hole are hermetically installed by welding;

still be provided with the sealing member between connecting block and the casing, the connecting block with casing contact part is provided with and is used for the installation the sealing member recess of sealing member, the connecting block still is provided with and is used for the installation heat exchange device's mounting hole.

The opening side of casing is provided with outer extension, outer extension with mounting panel relative position is provided with a plurality of screw holes, the mounting panel with outer extension relative position also be provided with a plurality of with the screw hole matched with screw hole of outer extension, outer extension with the mounting panel passes through screw fixed mounting.

The extension direction of the first interface is the same as the depth direction of the first channel, the inner diameter or equivalent inner diameter of the first interface is larger than the inner diameter or equivalent inner diameter of the first channel, a step is formed between the first interface and the first channel, the extension direction of the second interface is the same as the depth direction of the second channel, the inner diameter or equivalent inner diameter of the second interface is larger than the inner diameter or equivalent inner diameter of the second channel, and a step is formed between the second interface and the second channel.

The bent part of the first channel keeps a distance with the first socket hole of the first channel, and the bent part of the second channel keeps a distance with the first socket hole of the second channel.

Compared with the prior art, the heat exchange device has the advantages of simple processing and installation, light weight, low cost, better pressure resistance and higher heat exchange performance.

[ description of the drawings ]

FIG. 1 is a schematic perspective view of one embodiment of a heat exchange device of the present invention;

FIG. 2 is an exploded view of the heat exchange unit of FIG. 1;

FIG. 3 is a schematic view of a second connector block of the heat exchange unit of FIG. 1;

FIG. 4 is a schematic structural view of a mounting plate of the heat exchange apparatus of FIG. 1;

FIG. 5 is a schematic perspective view of the heat exchange unit of FIG. 1 with the first and second mounting plates coupled;

FIG. 6 is a schematic sectional view A-A of FIG. 5;

FIG. 7 is a schematic perspective view of the heat exchange device of FIG. 1 with the housing removed;

FIG. 8 is a cross-sectional schematic view of the housing of the heat exchange device of FIG. 1;

FIG. 9 is a schematic cross-sectional view of the heat exchange device of FIG. 1 at the third port and the fourth port;

FIG. 10 is a schematic cross-sectional view of the heat exchange device of FIG. 1 at the location of the first and second chambers;

FIG. 11 is an exploded view of yet another embodiment of the heat exchange unit of the present invention;

FIG. 12 is a schematic cross-sectional view of the heat exchange device of FIG. 11;

FIG. 13 is a schematic perspective view of a connector block of the heat exchange device of FIG. 11;

figure 14 is a cross-sectional schematic view of the connector block of figure 13.

[ detailed description ] embodiments

The following describes embodiments of the present invention with reference to the drawings.

Fig. 1 is a perspective view of an embodiment of a heat exchange device of the present invention, and fig. 2 is an exploded view of the heat exchange device shown in fig. 1, and as shown in the drawing, in this embodiment, the heat exchange device 1 includes a housing 7 with one side open, a first connection block 2, a second connection block 3, a mounting plate 4, and a heat exchange core partially or completely accommodated in the housing 7, the mounting plate 4 is fixedly mounted on the open side of the housing 7 and covers the opening of the housing, and a first fluid channel is formed in the heat exchange core.

The heat exchanger core comprises at least one flat tube 5, and in the present embodiment, the heat exchanger core comprises two flat tubes arranged parallel to each other. The flat tube 5 has a plurality of fine fluid passages formed therein, and the first fluid passage includes these fine fluid passages. The heat exchange device 1 is further provided with a first port 21 and a second port 22, the first port 21 and the second port 22 being located at the first connection block 2. Both ends of the flat tube 5 communicate with the first port 21 and the second port 22, respectively, so that the first fluid passage communicates with the first port 21 and the second port 22, respectively. The housing 7 is further provided with a third port 71 and a fourth port 72, a cavity is formed in the housing, the heat exchange core is partially or completely accommodated in the cavity, the third port and the fourth port are communicated with the cavity, and the first fluid channel is isolated from the cavity.

As shown in fig. 3, the second connector block 3 is provided with a first channel 31 and a second channel 32, and the first channel 31 and the second channel 32 are recessed in a side of the second connector block 3 opposite to the first connector block 2. The first channel 31 comprises a first straight channel 311, a second straight channel 312, a bending part 313 between the first straight channel 311 and the second straight channel 312, and a bubble-shaped end 314 at one end of the second straight channel 312 far from the bending part 313. The second channel 32 also includes a first straight channel 321, a second straight channel 322, a bending part 323 between the first straight channel 321 and the second straight channel 322, and a bubble-shaped end 324 at one end of the second straight channel 322 far from the bending part 323. The second connection block 3 is further provided with a first receiving hole 33 of the first channel corresponding to the first straight channel 311 of the first channel 31, and a first receiving hole 33 of the second channel corresponding to the first straight channel 321 of the second channel 32. The flat tube 5 is in clearance fit with the first socket hole 33, one end of the flat tube 5 can pass through the first socket hole 33 of the second channel 32, the other end of the flat tube 5 can pass through the first socket hole 33 of the first channel 31, and the flat tube 5 and the first socket hole 33 can be fixedly installed through welding and the like. One end of the flat tube, extending into the first socket hole of the first channel, at least partially extends into the first straight channel of the first channel or is communicated with the first straight channel of the first channel, and one end of the flat tube, extending into the first socket hole of the second channel, at least partially extends into the first straight channel of the second channel or is communicated with the first straight channel of the second channel. In order to secure the mounting stability between the flat tube 5 and the first socket hole 33, the depth of the first socket hole is 2mm or more. It should be noted here that the gap between the flat tube 5 and the first receptacle hole 33 can be filled with a melted welding material during welding, so that the flat tube 5 and the first receptacle hole 33 are sealingly mounted.

The inner diameter or equivalent inner diameter of the bubble end 314,324 is greater than the width of the second straight passageway 312,322, and the bubble end 314 of the first channel 31 is opposite the first interface 21, the inner diameter or equivalent inner diameter of the bubble end 314 of the first channel 31 is substantially greater than or equal to the inner diameter or equivalent inner diameter of the portion of the bubble end 314 of the first interface 21 adjacent the first channel 31, the bubble end 324 of the second channel 32 is opposite the second interface 22, the inner diameter or equivalent inner diameter of the bubble end 324 of the second channel 32 is substantially greater than or equal to the inner diameter or equivalent inner diameter of the portion of the bubble end 324 of the second interface 22 adjacent the second channel 32, therefore, the local sudden-shrinkage resistance generated when the fluid flows from the first port 21 to the second straight channel 312 of the first channel 31 and from the second straight channel 322 of the second channel 32 to the second port 22 can be effectively reduced, and the fluid pressure drop loss can be effectively reduced.

By providing the second straight channel 312 and the bent portion 313 in the first channel 31 and keeping the bent portion 313 of the first channel 31 at a distance from the first insertion hole 33 of the first channel 31, the fluid flows into the fine fluid channels in the flat tube 5 through the second straight channel 312 and the bent portion 313 in sequence after flowing from the first port 21, so that the fluid does not directly impact the flat tube 5 when flowing from the first port 21, the problem of uneven distribution of the fluid in each fine fluid channel of the flat tube 5 can be reduced, and the heat exchange performance of the heat exchange device can be improved.

Also, the second straight passage 322 and the bent portion 32 are provided in the second passage 32, and the bent portion 323 of the second passage 32 is kept away from the first insertion hole 33 of the second passage 32. Therefore, the fluid flows to the second connector 22 through the bent portion 323 and the first socket hole 33, so that the flow resistance of the fluid flowing from each fine fluid passage of the flat tube 5 to the second passage 32 is substantially the same, the problem of uneven distribution of the fluid in each fine fluid passage of the flat tube 5 can be reduced, and the heat exchange performance of the heat exchange device can be improved.

In addition, the first interface 21 is arranged opposite to the bubble-shaped end 314 of the first channel 31, and the second interface 22 is arranged opposite to the bubble-shaped end 324 of the second channel 32, so that the first channel 31 and the second channel 32 can be flexibly arranged according to the positions of the first interface 21 and the second interface 22, and the heat exchange device can be applied to more complex installation environments.

As shown in fig. 2 and 4, the mounting plate 4 is provided with a second socket hole 42 penetrating through the mounting plate 4, the flat tube 5 and the second socket hole 42 are in clearance fit, the end of the flat tube 5 can pass through the second socket hole 42, and the flat tube 5 and the second socket hole 42 can be fixedly mounted by welding or the like. The mounting plate 4 and the second connecting block 3 can be fixed in a sealing way by welding and the like. The first socket hole 33 is opposed to the second socket hole 42, and the flat tube 5 passes through the second socket hole 42 and the first socket hole 33 in this order. Likewise, the depth of the second socket hole 42 is 2mm or more.

The mounting plate 4 covers the opening side of the housing 7, a sealing member 8 is further provided between the mounting plate 4 and the housing 7 in order to improve sealing performance, a sealing member groove 41 and a screw hole 46 for mounting the sealing member are provided at a portion of the mounting plate 4 in contact with the housing 7, and the mounting plate 4 can be fixedly mounted to the housing 7 by screws. The mounting plate 4 is also provided with mounting holes 47 for mounting the heat exchange device.

It should be noted here that the mounting plate may be integrated into the connecting block or that the connecting block also has the function of a mounting plate, in which case the connecting block is also provided with a seal groove and screw holes, in which case the second socket hole need not be provided. Of course, the mounting plate may be disposed at other positions of the housing or mounted and fixed at other positions of the housing to fix the heat exchange device.

As shown in fig. 5 and 6, the first port 21 and the second port 22 of the first connection block 2 penetrate the first connection block 2, and the first port 21 and the second port 22 are stepped holes including a small diameter portion near the second connection block 3 side and a large diameter portion far from the second connection block 3 side. As shown in fig. 6, the first interface 21 includes a large diameter portion 211 and a small diameter portion 212, wherein the small diameter portion 212 is opposite to the bubble-shaped end 314 of the first channel 31, and the inner diameter or equivalent inner diameter of the small diameter portion 212 is substantially the same as or the same as the inner diameter or equivalent inner diameter of the bubble-shaped end 314 of the first channel 31. It should be noted here that the first channel 31 and the second channel 32 may also be disposed on a side portion of the first connecting block 2 contacting the second connecting block 3, and in this embodiment, by combining the first connecting block 2, the second connecting block 3 and the mounting plate 4, on one hand, the number of machining processes on each part is relatively small, machining is easy, and on the other hand, material can be reduced (for example, the thickness of the mounting plate may be relatively small), thereby reducing cost.

In this embodiment, through set up sealed passageway in first connecting block and/or second connecting block, not only the pressure resistance of passageway is high, and difficult deformation under the high pressure, simple structure moreover, processing is convenient, and the cost is lower.

As shown in fig. 7, after the flat tube is bent several times, both end portions of the flat tube pass through the first and second insertion holes 33 and 42 and then extend into the first and

second passages

31 and 32, so that the first port 21 communicates with the second port 22 through the first fluid passage.

The flat tube 5 is formed with a plurality of straight portions 51, a plurality of first bending portions 52 and a plurality of second bending portions 53 through bending, wherein the mounting panel 4 is kept away from to the first bending portion 52, and the mounting panel 4 is close to the second bending portion 53, and a plurality of straight portions 51 are roughly parallel to each other, and keep a certain distance between two adjacent straight portions 51, and the distance range between two adjacent straight portions 51 is 0.5mm ~ 6 mm. A fin 6 is further provided between two adjacent flat portions 51, and the fin 6 is mostly located in a space between the two adjacent flat portions 51. The fins 6 may be saw-tooth fins or fins of other forms, such as dimp l e plates, twisted strips, perforated fins, spiral coils, straight fins, etc., and the fins 6 disposed between two adjacent straight portions 51 may increase the turbulent flow performance of the fluid, thereby improving the heat exchange performance of the heat exchange device. One end of the fin 6 close to the first bending portion 52 can keep a certain distance from the first bending portion 52, that is, the straight portion 51 includes a first finless region 511 without fins at one end close to the first bending portion 52, a first flow area 513 is formed between two adjacent first finless regions 511 or between the first finless region 511 and the inner wall, and the distance between one end of the fin 6 close to the first bending portion 52 and the first bending portion 52 ranges from 5mm to 30 mm. In this way, since the flat portions 51 are not provided with fins at a portion thereof near one end of the first folded portion 52, the flow resistance of the fluid in the first flow area 513 between two adjacent flat portions in which no fins are provided is small, the fluid can flow along the width direction of the flat tube 5 between the first folded portion 52 and the first flow area 513 first, and the fluid in the space between any set of adjacent flat portions can be distributed substantially uniformly in the space or along the width direction of the flat tube, and the fluid flows along the length direction of the flat portions 51 between the adjacent flat tubes, so that the fluid can be distributed uniformly in the width direction and the length direction of the flat tube, thereby improving the heat exchange performance of the heat exchange device.

Similarly, the end of the fin 6 close to the second bending portion 53 may be kept at a certain distance from the second bending portion 53, that is, the straight portion 51 further includes a second finless zone 512 at the end close to the second bending portion 53, where no fin is disposed, a second through-flow zone 514 is formed between two adjacent second finless zones 512 or between the second finless zone 512 and the inner wall, and the distance between the end of the fin 6 close to the second bending portion 53 and the second bending portion 53 ranges from 5mm to 30 mm. Because the partly that straight portion 51 is close to the one end of second bending 53 does not set up the fin to the length direction's that the messenger fluid respectively is provided with the straight portion of fin 6 flow is roughly the same, and the flow resistance that makes the fluid flow along the length direction flow that is provided with the straight portion of fin 6 is roughly the same, also is favorable to fluidic evenly distributed, thereby improves heat transfer performance.

The fins 6 are provided with a composite layer, and the fins 6 and the flat tubes 5 may be fixed together by brazing or the like.

In this embodiment, the housing 7 comprises an outer housing 701 and a partition 702, wherein the outer housing 701 and the partition 702 may be integrally injection molded or cast, and the material may be selected according to the fluid property in the first fluid passage and the application environment. As shown in fig. 8 to 10, the partition 702 is disposed in the outer housing 701, and the housing 7 has a first chamber 73, a second chamber 74 and a third chamber 75 formed therein, wherein the first chamber 73 is communicated with the third port 71, and the second chamber 74 is communicated with the fourth port 72. The partition 702 includes a first partition wall 77, a first wall portion 732 and a second wall portion 742, wherein the first partition wall 77 is disposed between the first chamber 73 and the second chamber 74 without direct communication between the first chamber 73 and the second chamber 74. Also, one end of the second chamber 74 is opened, one end of the third chamber 75 is opened, and the opening of the second chamber 74 is oriented in the same direction as the opening of the third chamber 75.

A first wall 732 is disposed between first chamber 73 and third chamber 75, and a second wall 742 is disposed between second chamber 74 and third chamber 75. A first communication hole 731 is provided in the first wall portion 732 opposing the third port 71, the first chamber 73 communicates with the third chamber 75 through the first communication hole 731, a second communication hole 741 is provided in the second wall portion 742 opposing the fourth port 72, and the second chamber 74 communicates with the third chamber 75 through the second communication hole 741.

The projection of the third port 71 on the first wall 732 does not interfere with the first communication hole 731, and the projection of the fourth port 72 on the second wall 742 does not interfere with the second communication hole 741. The projection of the first finless area 511 on the first wall portion 732 partially or completely coincides with the first communication hole 731, and the projection of the fin 6 on the first wall portion 732 does not coincide with the first communication hole 731. The projection of the second finless area 512 on the second wall 742 partially or completely overlaps the second communication hole 741, and the projection of the fin 6 on the second wall 742 does not overlap the second communication hole 741.

The first communication hole 731 includes a plurality of small communication holes with a smaller diameter, and each small communication hole is opposite to at least one first flow area 513, that is, a projection of each first flow area 513 on the first wall 732 is located at one small communication hole. Thus, as shown by the arrows in fig. 9, when the third port 71 is used as an inlet of the first fluid, the first fluid can uniformly flow into the first through-flow areas 513 through the small communication holes after flowing into the first chamber 73 from the third port 71, flow into the second chamber 74 after passing through the fins 6 and the second through-flow areas 514, and flow out of the heat exchanger through the fourth port 72, which is favorable for improving the heat exchange performance of the heat exchanger.

Of course, the second communication hole 741 may be provided with a plurality of small communication holes having a small diameter.

An extension portion 76 is opened on the opening side of the housing 7, the extension portion 76 is provided with a plurality of screw holes 761, the screw holes 761 of the extension portion are fitted to the screw holes 46 of the mounting holes, and the housing 7 and the mounting plate 6 are fixedly mounted by screws 9 and are hermetically fixed by a sealing member 8.

Fig. 11 to 14 show another embodiment of the present invention, and one difference between the present embodiment and the previous embodiment is that the partition 702 further includes a second partition wall 78, and the first chamber 73 is partitioned into two sub-chambers by the second partition wall 78: a first sub-chamber 733 and a second sub-chamber 734, and the first sub-chamber 733 communicates with the third port 71 ', and the second sub-chamber 734 communicates with the fourth port 72'. Likewise, the first communication hole 731 is also partitioned into two sub communication holes by the second partition wall 78: a first sub communication hole 7311 and a second sub communication hole 7312. Similarly, the first sub communication hole 7311 and/or the second sub communication hole 7312 may include a plurality of small communication holes having a small diameter.

After flowing into the first sub-chamber 733 from the first port 71 ', the fluid flows into a part of the first flow area 513 through the first communication sub-hole 7311, flows to a part of the second flow area 514 through the fin 6, then flows to the other part of the second flow area 514 through the second communication sub-hole and the second chamber 74, flows into the second sub-chamber 734 through the fin 6 and the other part of the first flow area 513 through the second communication sub-hole 7312, and flows out of the heat exchanger through the fourth port 72'. Through this kind of mode of setting up, can improve the flow path of first fluid, make the more abundant heat transfer of first fluid to improve the heat transfer performance of heat exchanger, the size is less under equal heat transfer performance simultaneously, can reduce the size of heat exchanger, makes heat exchange device miniaturized.

Another difference of this embodiment is that in this embodiment the heat exchange device comprises only one connection block 2'. As shown in fig. 13 and 14, the connection block 2 'is provided with a first passage 23' and a second passage 24 ', and the connection block 2' is further provided with a first port 21 'communicating with the first passage 23' and a second port 22 'communicating with the second passage 24'. The extending direction of the first port 21 'and the second port 22' is the same as the depth direction of the first channel 23 'and the second channel 24', the inner diameter or equivalent inner diameter of the first port is larger than that of the first channel, a step is formed between the first port and the first channel, the inner diameter or equivalent inner diameter of the second port is larger than that of the second channel, and a step is formed between the second port and the second channel. A first receiving hole 33 'communicating with the first channel 23' and the second channel 24 'is provided in a wall portion of the connection block 2' opposite to the mounting plate 4, and an extension of the first port 21 'does not intersect or interfere with the first receiving hole 33' of the first channel 23 ', and an extension of the second port 22' does not intersect or interfere with the first receiving hole 33 'of the second channel 24'. The arrangement mode is simple to process and high in integration level, welding difficulty can be reduced, and reliability of products can be improved.

It should be noted here that there may be only one difference between the two points of the present embodiment, and the others are the same as or similar to the previous embodiment. Two points are distinguished from one embodiment for convenience of explanation.

Other structures and features of this embodiment are the same as or similar to those of the previous embodiment, and are not described in detail here.

The foregoing is illustrative of the present invention and is not to be construed as limiting thereof in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can now make numerous changes and modifications to the disclosed embodiments, and equivalents thereof, without departing from the scope of the invention as set forth in the claims below. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.

Claims

1. A heat exchange device comprises a shell and a heat exchange core body, wherein a cavity is formed in the shell, part or all of the heat exchange core body is accommodated in the cavity, the shell is further provided with a third interface and a fourth interface, the third interface and the fourth interface are communicated with the cavity, a first fluid channel is formed in the heat exchange core body, and the first fluid channel is isolated from the cavity;

the connecting block comprises a first connecting block and a second connecting block, the first interface and the second interface are arranged on the first connecting block, the first channel and the second channel are recessed in one side surface, opposite to the first connecting block, of the second connecting block, the first channel comprises a first straight channel, a second straight channel and a bending part positioned between the first straight channel and the second straight channel, the second connecting block is further provided with a first bearing hole of the first channel corresponding to the first straight channel of the first channel and a first bearing hole of the second channel corresponding to the second channel,

the heat exchange core comprises at least one flat tube, at least one part of the first fluid channel is positioned in the flat tube, one end of the flat tube at least partially extends into the first socket hole of the first channel and is in sealed installation with the first socket hole of the first channel, the first channel is communicated with the first fluid channel of the flat tube, the other end of the flat tube at least partially extends into the first socket hole of the second channel and is in sealed installation with the first socket hole of the second channel, and the second channel is communicated with the first fluid channel of the flat tube;

the first channel further comprises a bubble-shaped end part, the bubble-shaped end part is positioned at one end, away from the bending part of the first channel, of the second straight channel of the first channel, and the bubble-shaped end part of the first channel is opposite to the first interface.

2. The heat exchange device according to claim 1, wherein the second channel also comprises a first straight channel, a second straight channel, and a bent part positioned between the first straight channel and the second straight channel, one end of the flat tube extending into the first socket hole of the first channel extends at least partially into the first straight channel of the first channel or is communicated with the first straight channel of the first channel, and one end of the flat tube extending into the first socket hole of the second channel extends at least partially into the first straight channel of the second channel or is communicated with the first straight channel of the second channel;

the depth of the first socket hole is more than or equal to 2 mm.

3. The heat exchange device according to claim 2, wherein the second channel further comprises a bubble-shaped end part of the second straight channel of the second channel far from the end of the bent part of the second channel, the inner diameter or equivalent inner diameter of the bubble-shaped end part of the first channel is larger than the through diameter of the second straight channel of the first channel, and the inner diameter or equivalent inner diameter of the bubble-shaped end part of the second channel is larger than the through diameter of the second straight channel of the second channel.

4. The heat exchange device of claim 3, wherein the bubble end of the second channel is opposite the second interface, the inner diameter or equivalent inner diameter of the bubble end of the first channel is greater than or equal to the inner diameter or equivalent inner diameter of the bubble end portion of the first interface proximate the first channel, and the inner diameter or equivalent inner diameter of the bubble end of the second channel is greater than or equal to the inner diameter or equivalent inner diameter of the bubble end portion of the second interface proximate the second channel.

5. The heat exchange device of claim 4, wherein the first and second ports are stepped holes, the first port comprises a small diameter portion near the second connection block side and a large diameter portion far from the second connection block side, the inner diameter or equivalent inner diameter of the bubble-shaped end portion of the first channel is greater than or equal to the small diameter portion of the first port, the second port comprises a small diameter portion near the second connection block side and a large diameter portion far from the second connection block side, and the inner diameter or equivalent inner diameter of the bubble-shaped end portion of the second channel is greater than or equal to the small diameter portion of the second port.

6. The heat exchange device according to claim 1, further comprising a mounting plate, the housing being open on one side, the mounting plate covering the open on one side of the housing and being fixedly mounted to the housing, the connection block being fixedly mounted to the mounting plate, the mounting plate being provided with a second socket hole opposite to the first socket hole, the flat tube being sealingly mounted to the first socket hole and the second socket hole by welding, the second socket hole having a depth of 2mm or more;

still be provided with the sealing member between mounting panel and the casing, the mounting panel with casing contact part is provided with and is used for the installation the sealing member recess of sealing member, the mounting panel still is provided with and is used for the installation heat exchange device's mounting hole.

7. The heat exchange device according to claim 1, wherein the shell is open at one side, the connecting block covers the open at one side of the shell and is fixedly installed with the shell, and the flat tube and the first socket hole are hermetically installed by welding;

8. The heat exchange device of claim 6 or 7, wherein the open side of the housing is provided with an outer extension portion, a plurality of screw holes are provided at a position of the outer extension portion opposite to the mounting plate, a plurality of screw holes matched with the screw holes of the outer extension portion are also provided at a position of the mounting plate opposite to the outer extension portion, and the outer extension portion and the mounting plate are fixedly mounted by screws.

9. The heat exchange device according to claim 1, wherein the first port extends in the same direction as a depth direction of the first channel, an inner diameter or an equivalent inner diameter of the first port is larger than an inner diameter or an equivalent inner diameter of the first channel, a step is formed between the first port and the first channel, the second port extends in the same direction as a depth direction of the second channel, an inner diameter or an equivalent inner diameter of the second port is larger than an inner diameter or an equivalent inner diameter of the second channel, and a step is formed between the second port and the second channel.

10. The heat exchange device of claim 5, wherein the bend of the first passageway is spaced from the first socket of the first passageway and the bend of the second passageway is spaced from the first socket of the second passageway.