CN114877718A

CN114877718A - Heat exchanger, air conditioner and machining method of heat exchanger

Info

Publication number: CN114877718A
Application number: CN202210289002.1A
Authority: CN
Inventors: 陈景爱; 李东涛; 华焓亦; 眭敏; 袁耀刚; 陇忠云
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-08-09
Anticipated expiration: 2042-03-22
Also published as: CN114877718B

Abstract

The application relates to the technical field of heat exchangers, and provides a heat exchanger, an air conditioner and a processing method of the heat exchanger, wherein the heat exchanger comprises: the tube plate comprises a tube plate main body and a mounting boss arranged on one side of the tube plate main body; the first end of the shell is connected with the mounting boss in a sealing mode. The heat exchanger tube side fluid leakage problem caused by heat exchanger tube plate deformation caused by welding of the heat exchanger in the prior art is effectively solved.

Description

Heat exchanger, air conditioner and machining method of heat exchanger

Technical Field

The application relates to the technical field of heat exchangers, in particular to a heat exchanger, an air conditioner and a processing method of the heat exchanger.

Background

With the increasing technological level and manufacturing technology, the manufacturing technology is gradually improved, and more production problems can be solved. At present, a central air conditioner is the most widely used temperature control tool, a core component in the central air conditioner is a heat exchanger, a shell-and-tube heat exchanger used in the central air conditioner consists of a tube side and a shell side, wherein the tube side is used for passing a tube side fluid, and the shell side is used for passing a shell side fluid for cooling or heating.

As shown in fig. 1 to 4, in the prior art, a tube side is composed of an end cover 1, a tube plate 2 and a heat exchange tube, wherein an end cover inlet 4, an end cover outlet 5, a shell inlet 6 and a shell outlet 7 are arranged on the end cover 1. Wherein, generally seal through asbestos sealing gasket between end cover 1, the tube sheet 2, when using asbestos sealing gasket, need to seal up asbestos sealing gasket and to going on the asbestos sealing gasket extrusion deformation between end cover 1 and tube sheet 2 through the mode of external force to reach sealed purpose. If in the asbestos sealing gasket installation, when the pipe sheet had the circumstances such as contact surface is uneven, warp, can lead to the extrusion that the asbestos sealing gasket received great, the asbestos warp more to break through the stress limit of asbestos and lead to sealed the inefficacy, seriously influence the quality and the life of heat exchanger. At present, the tube plate 2 and the shell 3 are connected in a welding mode, a fillet welding mode is generally adopted, a welding pool is large, and the tube plate 2 is slightly deformed due to large thermal stress after welding. The tube plate 2 deforms to cause that reliable sealing of tube pass fluid cannot be achieved by screwing the bolt when the asbestos sealing gasket is installed, and meanwhile, the tube plate deforms to cause that the taper of the tube plate hole occurs, so that expansion connection between the heat exchange tube and the tube plate is further influenced, the sealing reliability of the heat exchange tube is reduced, and the heat exchanger breaks down or even influences the whole central air conditioner.

Disclosure of Invention

The application provides a heat exchanger, an air conditioner and a processing method of the heat exchanger, which are used for solving the problem that the tube side fluid of the heat exchanger is leaked due to deformation of a tube plate of the heat exchanger caused by welding of the heat exchanger in the prior art.

In order to solve the above problem, in a first aspect, the present application provides a heat exchanger, including: the tube plate comprises a tube plate main body and a mounting boss arranged on one side of the tube plate main body; the first end of the shell is connected with the mounting boss in a sealing mode.

Further, the installation boss comprises a first boss section and a second boss section, the first end of the first boss section is connected with the tube plate main body, the first end of the second boss section is connected with the second end of the first boss section, the circumferential outer side diameter of the first boss section is larger than that of the second boss section, so that the first boss section and the second boss section form a step, and the first end of the shell is located on the circumferential outer side of the second boss section.

Further, the thickness of the first boss section is greater than the thickness of the second boss section.

Further, the inner surface of the first boss section is flush with the inner surface of the second boss section.

Further, the height of the first boss section is equal to the sum of the height of the second boss section and the wall thickness of the housing.

Furthermore, the tube plate and the shell are made of metal materials, and the first end of the shell is connected with the mounting boss in a welding mode.

Further, the second end of the first boss section is provided with a first welding groove, and the first welding groove is gradually reduced from the outside to the inside.

Furthermore, the first end of the shell is provided with a second welding groove which is gradually reduced from the outside to the inside.

Further, the tube plate main body and the mounting boss are of an integrally formed structure.

Further, the heat exchanger also comprises an end cover, and an end cover inlet and an end cover outlet are arranged on the end cover.

Further, the heat exchanger still includes the sealing member, and the tube sheet main part is provided with sealed recess in the one side that deviates from the installation boss, and the sealing member setting is between end cover and tube sheet main part.

Further, the heat exchanger comprises a heat exchange tube, and the end part of the heat exchange tube is hermetically connected with the tube plate main body.

In a second aspect, the present application also provides an air conditioner comprising a heat exchanger according to any one of claims 1 to 11.

In a third aspect, the present application further provides a method for processing a heat exchanger, where the heat exchanger is the heat exchanger according to any one of claims 1 to 11, and the method for processing the heat exchanger includes the following steps:

s10, processing a mounting boss on one side of the tube plate;

s20, processing tube pass mounting holes on the tube plate;

and S30, hermetically connecting the shell with the mounting boss of the tube plate.

Further, when the mounting boss is machined in the step S10, a first boss section and a second boss section are machined in a machining mode, the first boss section is located between the second boss section and the tube plate main body, and the outer diameter of the second boss section is smaller than that of the first boss section.

Further, blanking of the tube sheet is performed before step S10.

Compared with the prior art, the technical scheme provided by the embodiment of the application has the following advantages:

according to the technical scheme, the heat exchanger comprises a tube plate and a shell, wherein the tube plate comprises a tube plate main body and an installation boss arranged on one side of the tube plate main body, and the installation boss is connected with the first end of the shell in a sealing mode. The installation boss is arranged on one side of the tube plate main body, the connection and sealing method between the tube plate and the shell is changed through the structure of the installation boss, and the problem that in the prior art, the tube plate of the heat exchanger is deformed due to welding of the heat exchanger, so that tube pass fluid of the heat exchanger is leaked can be effectively solved.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive exercise.

FIG. 1 shows a schematic perspective view of a prior art heat exchanger;

FIG. 2 shows a schematic front view of the heat exchanger of FIG. 1;

FIG. 3 shows a schematic partial cross-sectional view of the heat exchanger of FIG. 1;

FIG. 4 shows an enlarged partial cross-sectional schematic view at C of the heat exchanger of FIG. 3;

FIG. 5 illustrates a schematic perspective view of a heat exchanger according to an embodiment of the present application;

FIG. 6 shows a schematic front view of the heat exchanger of FIG. 5;

FIG. 7 shows a schematic top view of the heat exchanger of FIG. 5;

FIG. 8 shows a left side schematic view of the heat exchanger of FIG. 5;

FIG. 9 shows a schematic partial cross-sectional view of the heat exchanger of FIG. 5;

FIG. 10 shows an enlarged partial cross-sectional schematic view at B of the heat exchanger of FIG. 9;

FIG. 11 shows a schematic perspective view of a tubesheet of an embodiment of the present application;

FIG. 12 shows a schematic front view of the tubesheet of FIG. 11;

FIG. 13 shows a rear schematic view of the tubesheet of FIG. 11;

FIG. 14 shows a schematic top view of the tube sheet of FIG. 11;

FIG. 15 shows a left side schematic view of the tubesheet of FIG. 11;

FIG. 16 shows a cross-sectional schematic view of the tubesheet of FIG. 15.

Wherein the figures include the following reference numerals:

1. an end cap; 2. a tube sheet; 3. a housing; 4. an end cap inlet; 5. an end cap outlet; 6. a housing inlet; 7. a housing outlet; 10. a tube sheet; 11. mounting a boss; 111. a first boss section; 112. a second boss section; 12. a tube sheet body; 13. sealing the groove; 14. a through hole in the tube plate; 15. a tube plate outer through hole; 20. a housing; 21. a housing inlet; 22. a housing outlet; 30. an end cap; 31. an end cap inlet; 32. an end cap outlet; 311. a first end cap inlet; 312. a second end cap inlet; 321. a first end cap outlet; 322. a second end cap outlet; 40. a seal member; 51. a first mounting seat; 52. a second mounting seat; 60. a heat exchange pipe; 70. and (5) a baffle plate.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

As shown in fig. 5 to 16, the present application provides a heat exchanger including: a tube sheet 10 and a shell 20. The tube plate 10 includes a tube plate body 12 and a mounting boss 11 disposed on one side of the tube plate body 12. The first end of the housing 20 is sealingly connected to the mounting boss 11.

In the technical solution of this embodiment, the heat exchanger includes a tube plate 10 and a shell 20, where the tube plate 10 includes a tube plate main body 12 and a mounting boss 11 disposed on one side of the tube plate main body 12, and the mounting boss 11 is connected to a first end of the shell 20 in a sealing manner. The tube plate 10 is used for connecting an end cover with a heat exchange tube 60 in a sealed heat exchanger, the heat exchange tube 60 is arranged inside the shell 20, a tube side fluid mainly flows in the heat exchange tube 60, the tube side fluid in the embodiment is a refrigerant, and a shell side fluid or other heat exchange media mainly flows in the shell 20. The installation boss 11 is arranged on one side of the tube plate main body 12, and is used for changing the connection and sealing method between the tube plate 10 and the shell 20 through the structure of the installation boss, so that the problem of refrigerant leakage of the heat exchanger caused by deformation of the tube plate 10 due to a welding method in the prior art can be effectively solved. Specifically, the connection of the first end of the shell 20 to the mounting boss 11 avoids deformation caused by the direct connection of the shell 20 to the tube sheet body 12. The housing 20 is provided with a first mounting seat 51 and a second mounting seat 52, and the housing 20 is connected with the outside through the first mounting seat 51 and the second mounting seat 52 in a manner of welding, fastening, riveting, and the like.

As shown in fig. 9, 10, 14, 15, and 16, in the solution of the present embodiment, the mounting boss 11 includes a first boss section 111 and a second boss section 112, a first end of the first boss section 111 is connected to the tube sheet main body 12, a first end of the second boss section 112 is connected to a second end of the first boss section 111, a circumferential outer diameter of the first boss section 111 is larger than a circumferential outer diameter of the second boss section 112, so that the first boss section 111 and the second boss section 112 form a step, and a first end of the shell 20 is located on a circumferential outer side of the second boss section 112. The mounting boss 11 is provided with a first boss section 111 and a second boss section 112 to form a step, i.e. the first boss section 111 is higher than the second boss section 112. The outer wall of the first boss section 111 limits the wall surface of the shell 20, and when the tube plate 10 and the shell 20 are connected, the relative position of the first boss section can be in a state to be connected, so that subsequent connection work is facilitated. Taking the welding of the tube plate 10 and the shell 20 as an example, the end surface of the first end of the shell 20 is adjacent to the step surface formed between the first boss section 111 and the second boss section 112, and the shell 20 and the tube plate 10 may be welded by butt welding. The second boss section 112 is located inside the first end of the shell 20 to prevent welding slag from splashing into the interior of the heat exchanger. Namely, the above structure not only ensures that the welding between the tube plate 10 and the shell 20 is butt welding, but also prevents slag generated in the welding process from entering the interior of the shell 20.

As shown in fig. 14 to 16, in the solution of the present embodiment, the thickness of the first boss section 111 is greater than the thickness of the second boss section 112. In practical applications, the surface of the first boss 111 to be connected to the housing 20 is a surface perpendicular to the axis, and the curved surface parallel to the axis is close to the outer surface of the housing 20 for facilitating connection. And the second boss section is positioned in the shell after being connected, so the thickness required by the second boss section, namely the outer diameter of the second boss section, is smaller than that of the first boss section. The structure can avoid the step formed by the inner wall of the second boss section 112 leaning against the axis of the heat exchanger, thereby avoiding the problem that the inside of the heat exchanger is not smooth or scratched when being installed.

As shown in fig. 14 to 16, in the solution of the present embodiment, the inner surface of the first boss section 111 is flush with the inner surface of the second boss section 112. Above-mentioned scheme is that the internal diameter of first boss section is the same with the internal diameter of second boss section promptly, and the internal surface of first boss section and the internal surface of second boss section belong to unified process processing and form in the actual production process, have reduced the degree of difficulty of processing, have still improved the efficiency of processing, and then have reduced the cost of machining. Specifically, the entire tube sheet 10 is integrally formed, and then later processed, such as lathing and grinding. The height of the first boss section 111 is equal to the sum of the height of the second boss section 112 and the wall thickness of the housing 20. The first boss section 111 and the second boss section 112 of the heat exchanger and the shell 20 are in smooth transition, and the problems of steps and bosses cannot occur. It should be noted that, in the technical solution of this embodiment, the height of the second boss section 112 is not smaller than 8mm, and the width is 8 mm. Therefore, when butt welding is carried out, welding slag can be effectively prevented from splashing, the welding slag is prevented from splashing to the internal heat exchange tube, burning, leakage or pollution of the heat exchange tube is caused, and the reliability and the energy efficiency of the heat exchanger are influenced. The height of the first boss section 111 is equal to the sum of the height of the second boss section 112 and the wall thickness of the shell 20, and the width of the first boss section 111 is not less than 20 mm. The beneficial effect of above-mentioned structure: after the installation boss 11 of the tube plate 10 is butt-welded with the shell 20, the problems of expansion joint of the heat exchanger and refrigerant leakage of the sealing surface of the tube plate 10 caused by deformation of the tube plate 10 of the heat exchanger caused by welding can be effectively solved. Meanwhile, the machining efficiency can be improved, the simple thickening tube plate is changed, a large number of drilling holes are formed, and the cost is increased due to the lengthened bolts.

In the solution of this embodiment (not shown in the drawings), the tube plate 10 and the shell 20 are made of metal, and the first end of the shell 20 is connected to the mounting boss 11 by welding. The shell and the mounting boss can be connected by welding, wherein, a plurality of welding modes can be adopted for welding, including but not limited to arc welding, high-frequency induction welding and the like, wherein the arc welding belongs to additive welding, the high-frequency induction welding belongs to self material fusion, and different welding modes can be selected according to actual requirements. The purpose of welding is to connect the tube plate and the shell into a whole, a sealed space is formed in the shell, and the sealing performance and the stability of the joint can be guaranteed to the maximum extent by using welding. The shell 20 is provided with the shell inlet 21 and the shell outlet 22, the shell outlet 22 is located at the second end of the shell 20, and the shell inlet 21 is located at the first end of the shell 20, so that the heat exchange effect is good.

It should be noted that the connection method of the present application is not limited to welding, and mechanical connection, adhesive connection and other connection methods can be adopted, and the connection standard for the heat exchanger is as follows: the heat exchanger guarantees the normal operation of heat exchanger under high temperature or low temperature environment, and the junction can not appear revealing between casing wherein and the tube sheet.

As shown in fig. 10 to 16, in the technical solution of the present embodiment, the second end of the first boss section 111 has a first welding groove, and the first welding groove is gradually decreased from outside to inside. The first welding groove can effectively ensure better welding quality between the first boss section 111 and the shell 20, and the welding seam is filled more easily.

As shown in fig. 10 to 16, in the technical solution of the present embodiment, the first end of the housing 20 has a second welding groove, and the second welding groove gradually decreases from the outside to the inside. The first welding groove and the second welding groove are combined to form a butt-joint welding line, one part of the first welding groove and the second welding groove are melted and mixed with the welding flux under the action of heat during welding, and the butt-joint welding line is filled through cooling and solidifying to finish welding. The tube sheet 10 and the shell 20 are now connected to form a complete seal against the space inside the shell. The butt welding has the advantages that the tube plate 10 is in a fixed position in the welding process, the heating welding position is the first boss section 111, so that welding stress can be formed between the mounting boss 11 and the shell 20, the influence of the welding stress between the mounting boss 11 and the shell 20 on the tube plate main body 12 is small, the sealing between the tube plate 10 and the heat exchange tube 60 and the sealing between the tube plate 10 and the end cover 30 can meet requirements, and the welding reliability is high.

It should be noted that the gap formed by combining the first welding groove and the second welding groove is not only suitable for butt welding connection, but also can form a metal ring by solidifying molten metal in the gap, and the connecting tube plate and the shell can be sealed, or can be connected by molten non-metal material, or can be connected by a part of adhesive which is less affected by ambient temperature.

As shown in fig. 11 to 16, in the technical solution of the present embodiment, the tube plate main body 12 and the mounting boss 11 are an integrally formed structure. The tube plate main body 12 and the mounting boss 11 are integrally formed, so that the processing flow can be simplified in the manufacturing process. Tube sheet 10 belongs to the flange work piece, generally adopts subtracting material processing, processes through the female machine of industry promptly, if tube sheet main part 12 and installation boss 11 be split type design then need design calculation to the cooperation relation between the two in the course of working, need calculate its machining precision according to its cooperation tolerance, and the integral type design can be higher in the precision, and the error is less relatively, reduces manufacturing procedure simultaneously, increases efficiency.

As shown in fig. 5 to 9, in the technical solution of this embodiment, the heat exchanger further includes an end cover 30, and the end cover 30 is provided with an end cover inlet 31 and an end cover outlet 32. In the technical scheme of this embodiment, the end cover 30 and the tube plate 10 are connected by bolts, and the end cover 30 is provided with the end cover inlet 31 and the end cover outlet 32, so that the number of inlets and outlets arranged on the shell 20 or the tube plate 10 is avoided, and the sealing effect is further ensured. The end cap is provided with a first end cap inlet 311, a second end cap inlet 312, a first end cap outlet 321 and a second end cap outlet 322, the first end cap inlet 311 and the first end cap outlet 321 correspond to the same set of heat exchange tube bundles, and the second end cap inlet 312 and the second end cap outlet 322 correspond to the same set of heat exchange tube bundles.

As shown in fig. 5 to 9, in the technical solution of the present embodiment, the heat exchanger further includes a sealing member 40, a sealing groove 13 is provided on a side of the tube plate main body 12 facing away from the mounting boss 11, and the sealing member 40 is disposed between the end cover 30 and the tube plate main body 12. The sealing groove is used for installing the sealing element, is in a closed ring shape and is positioned on the inner side of the tube plate main body, the sealing element can be effectively positioned by the arrangement of the sealing groove 13, and the sealing element is not easy to have the problems of dislocation and the like. The sealing element is embedded into the sealing groove to form sealing by the extrusion periphery of the end cover. The tube plate main body 12 is further provided with a plurality of tube plate outer through holes, the end cover 30 is provided with a plurality of through holes corresponding to the tube plate outer through holes, the through holes and the tube plate outer through holes form a mounting cavity of bolts, the bolts are installed in the mounting cavity, nuts are installed on one side, close to the bosses, of the tube plate outer through holes, the tube plate 10 and the end cover 30 are fixed through tightening the bolts, the end cover 30 and the tube plate 10 extrude the sealing element in the tightening process, the corresponding position of the sealing element is embedded into the sealing groove, and sealing is completed.

The sealing member of this embodiment is asbestos sealed, if there is the contact surface uneven or when warping the circumstances such as the tube sheet, can appear the not good problem of sealed effect, asbestos sealed the stress limit that has the conquassation, only through improving the effort between tube sheet and the end cover, can lead to asbestos sealed the sealed destruction of sealing up. Adopt the mode of fillet welding to weld among the prior art, can lead to the one side of orientation end cover of tube sheet to take place to warp, maximum deflection is at 2 ~ 3mm, leads to installing behind the asbestos gasket, under the sealing torque of bolt, can't realize the reliable sealed to the refrigerant, after production line assembly or after selling long-term use appears, tube sheet deformation stress release, the frequent emergence cold coal leakage problem. And above-mentioned structure can lead to the tube sheet hole of tube sheet to appear the tapering, and the maximum aperture difference is at 0.01 ~ 0.02mm, and the A face side tube sheet hole that appears promptly is big, and the tube sheet hole reduces gradually along tube sheet thickness direction, causes the heat exchange tube expanded joint back, and with the residual contact stress of tube sheet hole not enough, the sealed leakage that appears expanded joint.

As shown in fig. 5 to 9, in the solution of the present embodiment, the heat exchanger includes a heat exchange tube 60, and an end of the heat exchange tube 60 is hermetically connected to the tube plate body 12. The heat exchange tube 60 is connected with the tube plate main body 12 in an expansion joint mode, the tube plate main body 12 is provided with a tube plate through hole, and the end part of the heat exchange tube is positioned in the tube plate through hole for expansion joint, so that the sealing between the heat exchange tube 60 and the tube plate main body 12 can be further ensured, and the deformation of the tube plate main body 12 can be greatly reduced.

The end cap inlet 31 includes a first end cap inlet 311 and a second end cap inlet 312 and the end cap outlet 32 includes a first end cap outlet 321 and a second end cap outlet 322. The first end cover inlet 311 is communicated with the first end cover outlet 321, the heat exchange tube is of a U-shaped structure, two ends of the heat exchange tube are connected with the first end cover inlet 311 and the first end cover outlet 321 respectively, and an isolation boss and a sealing element are arranged between the end cover 30 and the tube plate main body 12 for sealing. Similarly, the second end cap inlet 312 and the second end cap outlet 322 are also the first end cap inlet 311 and the first end cap outlet 321 as described above, so that the problem of liquid leakage between the inlet and outlet of the end cap 30 and the tube plate 10 can be avoided. The housing 20 is provided with a housing inlet 21 and a housing outlet 22, the housing inlet 21 is disposed at a first end of the housing 20, the housing outlet 22 is disposed at a second end of the housing 20, and according to practical situations, the housing inlet 21 can be used as an outlet and the housing outlet 22 can be used as an inlet when in use.

As shown in fig. 5 to 9, in the solution of the present embodiment, the heat exchanger further includes a baffle plate 70, and the baffle plate 70 is located inside the shell. The baffle plate 70 ensures that the liquid flow in the heat exchanger flows as required, and the heat exchange efficiency is ensured to the maximum extent. For example, a first baffle plate is approximately sealed to a first side of the housing 20, a gap is formed between the first baffle plate and a second side (the first side and the second side are opposite) of the housing 20, a gap is formed between the second baffle plate and the first side of the housing 20, a second baffle plate is approximately sealed to the second side of the housing 20, a third baffle plate is approximately sealed to the first side of the housing 20, a gap is formed between the third baffle plate and the second side of the housing 20, and so on, the structure prolongs the flow path of the shell-side fluid, and is regular.

In summary, the technical solution of the present embodiment overcomes the adverse effect of fillet weld connection between the shell 20 and the tube sheet 10 in the prior art: adopt the fillet weld mode between casing among the prior art and the tube sheet, the junction structure of casing 20 and tube sheet 10 takes place the sudden change, produces stress concentration more easily, and interface tissue that arouses from this is unstable and welding deformation etc. and the gap is longer great, is difficult to fill up the gap, needs bigger welding power, and the welding stress of storage is bigger after the welding is accomplished, causes the problem of deformation like this more easily.

The technical scheme of this embodiment has still solved the welding mode among the prior art and has leaded to the tube sheet to take place the stress release deformation of welding storage, leads to the sealed face that is used for the tube side to take place the problem of warping. After the asbestos sealing gasket is installed due to the deformation of the end face of the tube plate towards the end cover, effective sealing cannot be realized under the moment of the bolt, or the stress is relaxed and leakage occurs under the long-term use. The tube plate deforms to cause the tube plate holes to have conicity, so that the heat exchange tubes are expanded and thinned unevenly, the residual contact stress between the heat exchange tubes and the tube plate holes is reduced, the expanded sealing reliability of the heat exchange tubes is reduced, and leakage occurs. In the tube plate in the prior art, the deformation problem can be solved only by simply thickening the tube plate, and the thickened structure can increase the length of a bolt, so that the cost is wasted; meanwhile, the mechanical lengthening of the heat exchange tube mounting hole is lengthened, and the mechanical cost is increased and wasted.

It should be noted that, in this embodiment, when selecting a tube sheet base material to be processed, a thicker tube sheet base material needs to be selected, and the thickness of the tube sheet main body after the installation boss is processed is equivalent to that of the tube sheet in the prior art, so that the requirement can be met. And a mounting boss is machined, so that the welding mode of butt welding with the shell is realized. The fillet welding is changed into butt welding, so that the welding power and the welding stress deformation are greatly reduced, and the sealing reliability of the shell pass can be ensured. Meanwhile, the reduction of welding stress energy storage can effectively solve the problem of tube plate deformation caused by the release of the long-time working stress of the shell tube.

The technical scheme of this embodiment can solve the deformation problem of tube sheet towards end cover 30 one side, guarantees that asbestos sealing gasket installs the back, realizes effectively sealing under the moment of bolt. The technical scheme of the embodiment can ensure that the welding stress is released little, the tube plate is not deformed and leakage does not occur under the condition of long-term use.

The technical scheme of this embodiment has still solved the tube sheet and has warp and lead to the tube sheet hole tapering problem to appear, guarantees that the heat exchange tube expanded joint back, produces sufficient residual contact stress with tube sheet hole internal surface, realizes effectively sealing.

Meanwhile, the tube plate is machined and removed (rough machined) on the tube pass side, and machining efficiency is high. And drilling (heat exchange tube mounting holes) after material removal. The simple thickening of the tube plate is changed, a large number of drilling holes are caused, and the machining cost is greatly improved. The simple thickening of the tube plate can be changed, the flange hole at the edge is deepened, the sealing bolt is lengthened, and the cost is wasted.

Meanwhile, a step is additionally arranged through the machine, and welding spatter is blocked during butt welding. The welding part is effectively protected, and slag generated by welding is prevented from splashing to the internal heat exchange tube, so that the heat exchange tube and the baffle plate 70 are burnt, leaked or polluted, and the reliability and the energy efficiency of the heat exchanger are influenced.

The application also provides a processing method of the heat exchanger (not shown in the figure), which is the heat exchanger and comprises the following steps: s10, processing a mounting boss on one side of the tube plate; s20, processing tube pass mounting holes on the tube plate; and S30, hermetically connecting the shell with the mounting boss of the tube plate. The processing method of the heat exchanger can effectively ensure that the heat exchanger has small deformation in the processing process and the welding stress has small influence on the sealing of the heat exchanger.

In the technical solution of this embodiment (not shown in the drawings), when the mounting boss 11 is machined in step S10, the first boss section 111 and the second boss section 112 are machined, the first boss section 111 is located between the second boss section 112 and the tube plate main body 12, and the outer diameter of the second boss section 112 is smaller than the outer diameter of the first boss section 111. The machining mode can effectively ensure the machining precision of the first boss section 111 and the second boss section 112.

In the technical solution of this embodiment (not shown in the drawings), the processing method performs blanking of the tube sheet before step S10. The processing mode has higher precision and can effectively save the cost.

It is noted that, in this document, relational terms such as "first" and "second," and the like, may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

The foregoing are merely exemplary embodiments of the present invention, which enable those skilled in the art to understand or practice the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A heat exchanger, comprising:

the tube plate (10), the tube plate (10) comprises a tube plate main body (12) and a mounting boss (11) arranged on one side of the tube plate main body (12);

the first end of the shell (20) is connected with the mounting boss (11) in a sealing mode.

2. The heat exchanger according to claim 1, wherein the mounting boss (11) includes a first boss section (111) and a second boss section (112), a first end of the first boss section (111) is connected to the tube sheet body (12), a first end of the second boss section (112) is connected to a second end of the first boss section (111), a circumferential outer diameter of the first boss section (111) is larger than a circumferential outer diameter of the second boss section (112) so that the first boss section (111) and the second boss section (112) form a step, and a first end of the shell (20) is located circumferentially outside of the second boss section (112).

3. The heat exchanger according to claim 2, wherein the thickness of the first boss section (111) is greater than the thickness of the second boss section (112).

4. The heat exchanger according to claim 3, wherein an inner surface of the first boss section (111) is flush with an inner surface of the second boss section (112).

5. The heat exchanger according to claim 4, characterized in that the height of the first boss section (111) is equal to the sum of the height of the second boss section (112) and the wall thickness of the shell (20).

6. The heat exchanger according to claim 2, wherein the tube plate (10) and the shell (20) are made of metal, and the first end of the shell (20) is connected with the mounting boss (11) by welding.

7. The heat exchanger according to claim 6, wherein the second end of the first boss section (111) has a first welding groove which is gradually reduced from the outside to the inside.

8. The heat exchanger according to claim 6, characterized in that the first end of the shell (20) has a second welding groove which decreases progressively from the outside towards the inside.

9. The heat exchanger according to any one of claims 1 to 8, wherein the tube sheet body (12) and the mounting boss (11) are of an integrally formed structure.

10. The heat exchanger according to any one of claims 1 to 8, further comprising an end cap (30), wherein an end cap inlet (31) and an end cap outlet (32) are provided on the end cap (30).

11. The heat exchanger according to claim 10, further comprising a seal (40), wherein a side of the tube plate body (12) facing away from the mounting boss (11) is provided with a sealing groove (13), and wherein the seal (40) is arranged between the end cover (30) and the tube plate body (12).

12. The heat exchanger according to claim 10, characterized in that the heat exchanger comprises a heat exchange tube (60), and ends of the heat exchange tube (60) are hermetically connected with the tube plate body (12).

13. An air conditioner, characterized in that the air conditioner comprises a heat exchanger, wherein the heat exchanger is the heat exchanger of any one of claims 1 to 12.

14. A method for manufacturing a heat exchanger, wherein the heat exchanger is the heat exchanger as claimed in any one of claims 1 to 12, and the method for manufacturing the heat exchanger comprises the following steps:

s10, processing a mounting boss on one side of the tube plate;

s20, processing tube pass mounting holes on the tube plate;

15. The method for machining a heat exchanger according to claim 14, wherein a first boss section (111) and a second boss section (112) are machined when machining the mounting boss (11) in step S10, the first boss section (111) is located between the second boss section (112) and the tube plate body (12), and the outer diameter of the second boss section (112) is smaller than that of the first boss section (111).

16. The method for processing a heat exchanger as recited in claim 14, wherein blanking of the tube sheet is performed before step S10.