Shell and tube heat exchanger and air conditioner with same

Abstract

The invention provides a shell-and-tube heat exchanger and an air conditioner with the same. The shell-and-tube heat exchanger comprises a tube shell, a tube plate and a sealing piece. A tube cavity with an outward opening is defined by the tube shell; the tube plate is formed or connected to the tube cavity opening of the tube shell, first connecting holes which are connected with the tube cavity opening and used for being connected with heat exchange tubes are defined in the inner side of the tube plate, and a groove cavity which is provided with an outward opening and connected with the first connecting holes is defined in the outer side of the tube plate; and the sealing piece is embedded in the opening of the groove cavity in a sealing manner, so that the refrigerant is converged or shunted or baffled after the opening of the groove cavity is closed. According to the shell-and-tube heat exchanger, the problems that sealing between the tube plate and the end plate is high in cost and prone to failure when a sealing gasket is used can be solved, and the purpose of reducing the cost of the shell-and-tube heat exchanger is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and particularly to a shell-and-tube heat exchanger and an air conditioner having the same. Background Art

[0002] In some existing technologies, a shell-and-tube heat exchanger includes a tube shell. Tube plates, gaskets, and end plates are sequentially arranged at the ports of the tube shell, and fasteners fasten the tube plates, gaskets, and end plates together in sequence. The gasket plays a sealing role between the tube plate and the end plate. Affected by the refrigerant, there are high requirements for the material and performance of the gasket, especially in terms of temperature difference resistance, pressure difference resistance, corrosion resistance, etc., which further increases the cost of the gasket. At the same time, to ensure the reliability of the seal between the tube plate and the end plate, there are also high requirements for the machining accuracy of the connection surfaces of the tube plate and the end plate, further increasing the manufacturing cost of the shell-and-tube heat exchanger. Therefore, the existing shell-and-tube heat exchangers have the disadvantages of high cost and high selling price.

[0003] In addition, affected by factors such as manufacturing errors and assembly errors, the tightening forces applied by the tightening bolts on the gasket are prone to uneven stress, resulting in seal failure between the end plate and the tube plate, and refrigerant leakage will occur between the end plate and the tube plate, reducing the working efficiency of the shell-and-tube heat exchanger. Summary of the Invention

[0004] In view of the above problems, the present invention is proposed to provide a shell-and-tube heat exchanger and an air conditioner having the same that can overcome or at least partially solve the above problems, and can solve the problems of high cost and easy failure of using a gasket to seal between the tube plate and the end plate, achieving the purpose of reducing the cost of the shell-and-tube heat exchanger.

[0005] Specifically, the present invention provides a shell-and-tube heat exchanger, including: a tube shell that defines a tube cavity opening outward; a tube plate formed on or connected to the opening of the tube cavity of the tube shell, and defining a first connection hole on the inner side that is connected to the tube cavity opening and used to connect a heat exchange tube, and defining a groove cavity that opens outward and is connected to a plurality of the first connection holes on the outer side; a seal member that is hermetically embedded in the opening of the groove cavity to cause the opening of the groove cavity to be closed for the confluence, diversion, or refraction of the refrigerant.

[0006] Optionally, there is a sloped surface portion on the outer side at the edge of the seal plate, a groove opening is defined between the sloped surface portion and the groove wall of the groove cavity, and the proportion of the slope on the edge of the seal plate in the inner and outer directions is greater than or equal to one-half.

[0007] Optionally, there is a straight surface portion opposite to the sloped surface portion on the groove wall of the groove cavity, and the groove opening portion is a single-sided V-shaped groove defined between the straight surface section and the sloped surface portion.

[0008] Optionally, when the refrigerant is converged or diverged after the opening of the cavity is closed by the seal, the seal includes: a sealing plate, which is integrally formed and fits into the opening of the cavity, and a second connection hole is defined thereon; a pipe joint, the inner end of which is hermetically inserted into or integrally formed on the second connection hole of the sealing plate, and the outer end of which is used to connect to an inlet pipe or an outlet pipe, wherein the inlet pipe is used to guide the refrigerant into the cavity for divergence, and the outlet pipe is used to discharge the converged refrigerant in the cavity.

[0009] Optionally, the outer plate surface of the sealing plate is flush with the outer plate surface of the tube plate, or the sealing plate sinks into the cavity.

[0010] Optionally, when the refrigerant is converged or diverged after the opening of the cavity is closed by the seal, the shell-and-tube heat exchanger further includes: a liquid distribution member, which is formed in or connected to the cavity and located inside the seal, and includes a liquid distribution plate, on which a plurality of flow equalizing holes are defined, so as to cause the refrigerant to flow from outside to inside through the plurality of flow equalizing holes and diverge to the heat exchange tubes, or guide the refrigerant flowing out of the heat exchange tubes to converge and discharge from inside to outside through the plurality of flow equalizing holes.

[0011] Optionally, a first limiting step is formed protruding on the cavity wall of the cavity, and a first limiting portion blocking the inside of the liquid distribution member is provided outside the first limiting step, and the first limiting portion of the first limiting step and the outer end orifice of the first connection hole are spaced apart in the inner and outer directions; and / or, the first limiting step extends along the cavity wall of the cavity, and both ends thereof have smooth curve-shaped or inclined line-shaped end faces that are smoothly transitioned with the cavity wall surface of the cavity, and / or the outside thereof abuts against the inside of the liquid distribution member, and / or the inside thereof is connected to the bottom surface of the cavity of the cavity.

[0012] Optionally, a second limiting step is further formed protruding on the cavity wall of the cavity, and a second limiting portion blocking the inside of the seal is provided outside the second limiting step; and, the second limiting step continuously or intermittently defines a sub-cavity, so as to cause the liquid distribution member to be blocked by the first limiting portion after passing through the sub-cavity.

[0013] Optionally, the liquid distribution member includes a converging plate, the converging plate is connected to the outside of the liquid distribution plate, and the converging plate defines a converging hole; the inner side surface of the seal fits on the outer plate surface of the converging plate, and a second connection hole with an inner end opposite to the converging hole is defined thereon, and the outer end of the second connection hole is used to directly or indirectly connect to an inlet pipe or an outlet pipe through a pipe joint.

[0014] Optionally, a second limiting step protrudes from the groove wall of the groove cavity, and a second limiting portion that abuts against the inner side of the seal is provided outside the second limiting step, and in the inner-outer direction, the second limiting portion of the second limiting step and the outer end orifice of the first connection hole are spaced apart.

[0015] Optionally, in the inner-outer direction, the thickness of the tube sheet is 38-58 mm, and the hole length of the first connection hole is 18-28 mm.

[0016] Optionally, the seal includes a sealing plate and a pipe joint sealingly connected thereto. The sealing plate covers the opening of the groove cavity, and the pipe joint communicates with the groove cavity at least through a second connection hole defined in the sealing plate; alternatively, the seal is a sealing plate integrally formed and fittingly covering the opening of the groove cavity; and, in the inner-outer direction, the depth of the groove cavity is 20-40 mm, the thickness of the sealing plate is 8-16 mm, the distance between the two farthest sides of the sealing plate is 80-120 mm, and the distance between the two nearest sides of the sealing plate is 30-80 mm.

[0017] Optionally, there are two groups of the groove cavities, and each group of the groove cavities has at least two; among at least two groove cavities in the same group, one groove cavity is a confluence groove cavity for confluencing the refrigerant, and the other groove cavity is a diversion groove cavity for diverting the refrigerant; and, the seals are arranged in one-to-one correspondence with the groove cavities.

[0018] The present invention provides an air conditioner, including the shell-and-tube heat exchanger described in any one of the above.

[0019] In the shell-and-tube heat exchanger of the present invention, the seal is directly integrated into the groove cavity of the tube sheet, and a structure for confluence, diversion or baffle is directly formed on the tube sheet. Compared with the existing shell-and-tube heat exchanger that requires an end plate and a seal to form a confluence, diversion or baffle structure on the tube sheet, the seal directly replaces the end plate and the gasket, thus saving the relatively expensive gasket and also saving the high technical requirements for the machining accuracy of the connection surface between the end plate and the tube sheet. Furthermore, the problems of high cost and easy seal failure caused by the installation of the end plate and the seal on the tube sheet are avoided. At the same time, the seal is directly embedded into the opening of the groove cavity. On the one hand, the functions of confluence, diversion, baffle, sealing, etc. borne by the end plate and the gasket of the existing shell-and-tube heat exchanger are all integrated into the groove cavity, so that the relatively large sealing area between the existing end plate and the tube sheet is reduced to the relatively small sealing area between the seal and the groove cavity, reducing the sealing difficulty of the shell-and-tube heat exchanger of the present invention and further reducing the manufacturing cost of the shell-and-tube heat exchanger of the present invention; on the other hand, the shell-and-tube heat exchanger of the present invention replaces the existing tube sheet by the way of sinking the seal into the groove cavity, that is, it is equivalent to integrating the existing tube sheet and the end plate together, thus saving the thickness occupied by the gasket and reducing the volume of the shell-and-tube heat exchanger of the present invention.

[0020] Furthermore, the sealing plate of the shell-and-tube heat exchanger of the present invention does not protrude from the groove cavity, so as to obtain an open working space outside the tube sheet. In this way, when installing the seal in the groove cavity, it will not be interfered by the seals installed in other groove cavities, thus facilitating the installation of the seal on the tube sheet and improving the assembly efficiency and quality of the shell-and-tube heat exchanger of the present invention. Especially in the case where the sealing plate and the tube sheet are assembled by welding, the interference of other seals on the welding torch will be avoided, enabling the welding torch to weld between the sealing plate and the tube sheet at any angle, thus achieving both high welding efficiency and high welding quality.

[0021] From the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more clearly aware of the above and other objects, advantages, and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Some specific embodiments of the present invention will be described in detail hereinafter with reference to the accompanying drawings in an illustrative but not restrictive manner. The same reference numerals in the drawings denote the same or similar components or parts. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0023] Figure 1 is a schematic structural diagram of the assembly of the tube sheet and the seal according to an embodiment of the present invention;

[0024] Figure 2 is a schematic exploded view of a shell-and-tube heat exchanger according to an embodiment of the present invention;

[0025] Figure 3 is a schematic structural diagram of the assembly of the tube sheet and the seal according to an embodiment of the present invention;

[0026] Figure 4 is a schematic cross-sectional structural diagram of the assembly of the tube sheet and the seal according to an embodiment of the present invention;

[0027] Figure 5 is a schematic structural diagram of the assembly of the tube sheet and the seal according to an embodiment of the present invention;

[0028] Figure 6 is a schematic structural diagram of a shell-and-tube heat exchanger according to an embodiment of the present invention;

[0029] Figure 7 is a schematic partial cross-sectional structural diagram of a shell-and-tube heat exchanger according to an embodiment of the present invention;

[0030] Figure 8 is according to Figure 2 a partial enlarged schematic view at position A in

[0031] Figure 9 is according to Figure 6Partial enlarged schematic view at B in the [Chinese context];

[0032] Figure 10 Schematic structural diagram of a seal according to an embodiment of the present invention;

[0033] Figure 11 Schematic cross-sectional view of a seal according to an embodiment of the present invention;

[0034] Figure 12 Schematic structural diagram of a liquid equalizing member according to an embodiment of the present invention;

[0035] Figure 13 Schematic structural diagram of a liquid equalizing member according to an embodiment of the present invention;

[0036] Figure 14 Schematic structural diagram of a seal according to an embodiment of the present invention;

[0037] Figure 15 Schematic structural diagram of an air conditioner according to an embodiment of the present invention.

[0038] Reference numerals:

[0039] Shell 100; tube sheet 200; first connection hole 210; outer end orifice 211; cavity 220; sub-cavity 221; outer side plate surface 230; first limiting step 240; first limiting portion 241; end face 242; second limiting step 250; second limiting portion 251; seal 300; slope portion 310; groove opening 320; sealing plate 330; outer side plate surface 331; second connection hole 332; pipe joint 340; inner end 341; outer end 341; liquid equalizing member 400; confluence plate 410; uniform flow holes 411; confluence holes 421; liquid inlet pipe 510; liquid outlet pipe 520; heat exchange pipe 600; upstream pipe section 610; middle stream pipe section 620; first branch pipe section 621; second branch pipe section 622; downstream pipe section 630; unit main body 700; first main body heat exchanger 710; main body unit 720; compressor 721; second main body heat exchanger 722; air conditioner indoor unit 800; indoor unit heat exchanger 810. Detailed implementation manners

[0040] The following refers to Figures 1 to 13To describe the shell-and-tube heat exchanger of the embodiments of the present invention and the air conditioner having the same. In the description of the embodiments of the present invention, it should be understood that the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features, that is, including one or more of such features. In the description of the present invention, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically defined. When a certain feature "includes or contains" a certain or certain features it covers, unless otherwise specifically described, this indicates that other features are not excluded and other features may be further included.

[0041] Unless otherwise clearly specified and defined, the terms "arranged", "installed", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. Those of ordinary skill in the art should be able to understand the specific meanings of the above terms in the present invention according to specific circumstances.

[0042] In addition, in the description of the embodiments, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through other features therebetween. That is, in the description of the embodiments, the first feature being "above", "over", and "on" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", or "under" the second feature may be the first feature being directly below or obliquely below the second feature, or merely indicating that the first feature has a lower horizontal height than the second feature.

[0043] In the description of the embodiments, the description with reference to terms such as "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic descriptions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

[0044] Next, the shell-and-tube heat exchanger of the embodiments of the present invention will be described with reference to the drawings.

[0045] AsFigures 1 - 13 As shown, the shell-and-tube heat exchanger of the embodiment of the present invention includes a shell 100, a tube sheet 200, and a seal 300.

[0046] The shell 100 defines a tube cavity opening outward, and at least one heat exchange tube 600 for providing a flow channel for the refrigerant can be arranged in the tube cavity.

[0047] The tube sheet 200 is formed on the opening of the tube cavity; alternatively, the tube sheet 200 is connected to the opening of the tube cavity of the shell 100. A first connection hole 210 connected to the tube cavity opening and used to connect the heat exchange tube 600 is defined on the inner side of the tube sheet 200, and a cavity 220 opening outward and connected to a plurality of first connection holes 210 is defined on the outer side of the tube sheet 200.

[0048] That is to say, a cavity 220 and a first connection hole 210 are formed on the tube sheet 200. The first connection hole 210 is located on the inner side of the tube sheet 200 relative to the cavity 220, and the first connection hole 210 is communicated with the cavity 220. The outer side of the cavity 220 has an opening, the inner side of the cavity 220 is communicated with the outer end opening of the first connection hole 210, and the inner end opening of the first connection hole 210 is connected to the tube cavity opening, so that the inner end opening of the first connection hole 210 is communicated with the heat exchange tube 600. The refrigerant can enter the heat exchange tube 600 through the cavity 220 and the first connection hole 210 in sequence; or, after flowing out of the heat exchange tube 600, the refrigerant enters the cavity 220 through the first connection hole 210.

[0049] The seal 300 is hermetically embedded in the opening of the cavity 220 to promote the confluence or diversion or refraction of the refrigerant after the opening of the cavity 220 is closed. That is to say, the seal 300 is hermetically embedded with the opening of the cavity 220, and the structure defined by the seal 300, the cavity 220, and a plurality of first connection holes 210 can play a role in confluence or diversion or refraction of the refrigerant.

[0050] The structure defined by the seal 300, the cavity 220, and a plurality of first connection holes 210 can divide the refrigerant into multiple branches and enter multiple heat exchange tubes 600 respectively. For example Figure 5 As shown, a stream of refrigerant flows from the cavity 220 into a plurality of first connection holes 210. This stream of refrigerant is divided into multiple streams of refrigerant by the plurality of first connection holes 210, and then flows into multiple heat exchangers through the plurality of first connection holes 210 respectively, so as to play a role in diverting the refrigerant.

[0051] The structure defined by the seal 300, the cavity 220, and a plurality of first connection holes 210 can play a role in changing the flow direction of the refrigerant. For example Figure 5As shown, a part of the multiple heat exchange tubes 600 communicates with a part of the multiple first connection holes 210, and another part of the multiple heat exchange tubes 600 communicates with another part of the multiple first connection holes 210. The flow direction of the refrigerant in this part of the heat exchange tubes 600 is different from that in the other part of the heat exchange tubes 600. The refrigerant converges from this part of the heat exchange tubes 600 and flows into the cavity 220, and is restricted and guided by the cavity 220 and the seal 300, so that the flow direction of the refrigerant is changed, and then is divided by the multiple first connection holes 210 and flows into the other part of the heat exchanger, so as to play a role in deflecting the refrigerant.

[0052] After the refrigerants in the multiple heat exchangers enter the cavity 220 through the multiple first connection holes 210 respectively, the multiple refrigerant flows will converge to play a role in confluence of the refrigerant.

[0053] Compared with the existing shell-and-tube heat exchanger, the shell-and-tube heat exchanger according to the embodiment of the present invention directly integrates the seal 300 into the cavity 220 of the tube sheet 200, directly forms a structure for confluence, diversion or deflection on the tube sheet 200, and directly uses the seal 300 to replace the end plate and the gasket, thereby saving the relatively expensive gasket and also saving the technical requirement of high machining accuracy for the connection surface between the end plate and the tube sheet 200, and further avoiding the problems of high cost and easy seal failure caused by the installation of the end plate and the seal 300 on the tube sheet 200.

[0054] Moreover, by directly embedding the seal 300 into the opening of the cavity 220, on the one hand, the functions of confluence, diversion, deflection, sealing, etc. borne by the end plate and the gasket of the existing shell-and-tube heat exchanger are all integrated into the cavity 220, so that the relatively large sealing area between the existing end plate and the tube sheet 200 is reduced to the relatively small sealing area between the seal 300 and the cavity 220, reducing the sealing difficulty of the tube heat exchanger of this embodiment, and further saving the manufacturing cost; on the other hand, the shell-and-tube heat exchanger of this embodiment replaces the existing tube sheet 200 by the way of sinking the seal 300 into the cavity 220, that is, it is equivalent to integrating the existing tube sheet 200 and the end plate together, thereby saving the thickness occupied by the gasket and reducing the volume of the shell-and-tube heat exchanger of the present invention.

[0055] Further, the seal 300 of the embodiment of the present invention is hermetically fitted in the opening of the cavity 220. That is to say, the sealing plate 330 does not protrude from the cavity 220, and an open working space can be obtained on the outer side of the tube sheet 200. In this way, when installing the seal 300 in the cavity 220, it will not be affected by the interference of the seals 300 installed in other cavities 220, thus facilitating the installation of the seal 300 on the tube sheet 200 and improving the assembly efficiency and assembly quality of the shell-and-tube heat exchanger of the present invention. Especially in the case where the sealing plate 330 and the tube sheet 200 are assembled by welding, the interference of other seals 300 on the welding torch will be avoided, so that the welding torch can weld between the sealing plate 330 and the tube sheet 200 at any angle, thereby achieving both high welding efficiency and high welding quality.

[0056] As Figures 1 to 13 shown, the shell-and-tube heat exchanger of the embodiment of the present invention includes a shell 100, a tube sheet 200, a plurality of seals 300 and a plurality of heat exchange tubes 600.

[0057] On the outer side of the tube sheet 200, there are provided three sets of cavities 220 corresponding to the upstream tube sections 610 of the plurality of heat exchange tubes 600, the downstream tube sections 630 of the plurality of heat exchange tubes 600, and the middle tube sections 620 of the plurality of heat exchange tubes 600 respectively. Each set of cavities 220 includes at least one cavity 220. On the inner side of the tube sheet 200, there are three sets of first connection holes 210 connected to the three sets of cavities 220. Each set of first connection holes 210 has a plurality of first connection holes 210.

[0058] Among them, the middle tube section 620 includes a first branch tube section 621 and a second branch tube section 622. The liquid inlet end of the first branch tube section 621 is communicated with the upstream tube section 610 of the heat exchange tube 600, and the liquid outlet end of the first branch tube section 621 is communicated with the corresponding cavity 220 through a part of the plurality of first connection holes 210. The liquid inlet end of the second branch tube section 622 is communicated with the corresponding cavity 220 through the other part of the plurality of first connection holes 210, and the liquid outlet end of the second branch tube section 622 is connected to the downstream tube section 630 of the heat exchange tube 600.

[0059] The plurality of seals 300 are configured into three sets of seals 300 groups, and the three sets of seals 300 groups are respectively and correspondingly matched with the openings of the cavities 220 in the three sets of cavities 220 connected to the upstream tube sections 610 of the plurality of heat exchange tubes 600, the downstream tube sections 630 of the plurality of heat exchange tubes 600, and the middle tube sections 620 corresponding to the plurality of heat exchange tubes 600.

[0060] In some embodiments, such as Figures 1 - 3As shown, there are two groups of slot cavities 220, and each group of slot cavities 220 has at least two. Among the at least two slot cavities 220 in the same group, one slot cavity 220 is a confluence slot cavity 220 for refrigerant confluence, and the other slot cavity 220 is a diversion slot cavity 220 for refrigerant diversion. The seals 300 are provided in one-to-one correspondence with the slot cavities 220. That is to say, the diversion slot cavity 220 is used to divert the refrigerant so that the diverted refrigerant enters the plurality of heat exchange tubes 600 more evenly, thereby improving the heat exchange efficiency. The confluence slot cavity 220 is used to converge the refrigerant discharged or diverted from the plurality of heat exchangers so that the converged refrigerant can be discharged.

[0061] For example Figure 4 and Figure 5 As shown, the slot cavity 220 corresponding to the upstream pipe section 610 of the plurality of heat exchange tubes 600 is a diversion slot cavity 220, and the slot cavity 220 corresponding to the downstream pipe section 630 of the plurality of heat exchange tubes 600 is a confluence slot cavity 220.

[0062] In addition, each group of slot cavities 220 is divided into multiple ones, reducing the area of each slot cavity 220 and the seal 300 cooperating with the slot cavity 220, and reducing the installation difficulty between the slot cavity 220 and the seal 300. Especially when the slot cavity 220 and the seal 300 are connected by welding, the welding difficulty is reduced.

[0063] In some embodiments, the seal 300 is welded to the tube sheet 200 to cause the weld formed by welding to seal at least the joint between the edge of the seal 300 and the wall of the slot cavity 220 of the tube sheet 200. That is to say, by welding the edge of the seal 300 or the edge of the seal 300 and other parts to the wall of the slot cavity 220 of the tube sheet 200, not only the purpose of fixedly connecting the seal 300 to the tube sheet 200 is achieved, but also the sealing effect between the seal 300 and the wall of the slot cavity 220 of the tube sheet 200 is better. In addition, no other sealing structure needs to be provided between the seal 300 and the wall of the slot cavity 220 of the tube sheet 200, so that there is no need to provide space for installing the sealing structure between the seal 300 and the wall of the slot cavity 220 of the tube sheet 200, thereby reducing the volume of the shell-and-tube heat exchanger according to the embodiment of the present invention.

[0064] Specifically, as Figures 10 - 14 shown and referring to Figure 1, there is a slope surface portion 310 on the outer side at the edge of the sealing plate 330. An outwardly opening groove 320 is defined between the slope surface portion 310 and the groove wall of the groove cavity 220, and the proportion of the slope surface on the edge of the sealing plate 330 in the inner and outer directions is greater than or equal to one-half. That is to say, the relatively large size of the slope surface portion 310 in the inner and outer directions can enable the sealing plate 330 and the groove wall of the groove cavity 220 of the tube sheet 200 to have a relatively large welding area after welding, thereby improving the connection stability and sealing effect between the sealing plate 330 and the groove wall of the groove cavity 220 of the tube sheet 200.

[0065] Among them, the proportion of the slope surface on the edge of the sealing plate 330 in the inner and outer directions includes, but is not limited to, 0.5, 0.6, 0.7, 0.8, 0.9 or 1.

[0066] In some embodiments, as Figure 1 shown, there is a straight surface portion opposite to the slope surface portion 310 on the groove wall of the groove cavity 220, and the groove 320 is a single-sided V-shaped groove 320 defined between the straight surface section and the slope surface portion 310. When the shell-and-tube heat exchanger of the embodiment of the present invention is processed, only the edge of the sealing plate 330 needs to be processed with the slope surface portion 310, which simplifies the manufacturing process of the shell-and-tube heat exchanger. The sealing member 300 and the groove cavity 220 are welded on one side, and less welding wire is used during the welding process, further reducing the manufacturing cost.

[0067] In some other embodiments, there is a slope surface that is opposite to the slope surface portion 310 and is inclined at the notch of the groove cavity 220, and the slope surface portion 310 and the slope surface form a double-sided groove 320.

[0068] In some embodiments, as Figure 5 shown, when the refrigerant converges or diverges after the sealing member 300 closes the opening of the groove cavity 220, the sealing member 300 includes a sealing plate 330 and a pipe joint 340. In other words, the sealing member 300 that fits the opening of the groove cavity 220 corresponding to the upstream pipe section 610 of the plurality of heat exchange tubes 600 or the sealing member 300 that fits the opening of the groove cavity 220 corresponding to the downstream pipe section 630 of the plurality of heat exchange tubes 600, and this sealing member 300 includes a sealing plate 330 and a pipe joint 340.

[0069] The sealing plate 330 is integrally formed and fits snugly into the opening of the cavity 220, and a second connection hole 332 is defined thereon. The inner end 341 of the pipe joint 340 is hermetically inserted into or integrally formed on the second connection hole 332 of the sealing plate 330, and its outer end 341 is used to connect with the liquid inlet pipe 510 or the liquid outlet pipe 520, so that the pipe joint 340 can communicate with the cavity 220 through the second connection hole 332, or the inner end 341 of the pipe joint 340 is inserted into the cavity 220 through the second connection hole 332, so that the inner end 341 of the pipe joint 340 is directly communicated with the cavity 220. That is to say, for the seal 300 that cooperates with the opening of the cavity 220 corresponding to the upstream pipe section 610 of the plurality of heat exchange tubes 600, the pipe joint 340 of the seal 300 is connected to the liquid inlet pipe 510; for the seal 300 that cooperates with the opening of the cavity 220 corresponding to the downstream pipe section 630 of the plurality of heat exchange tubes 600, the pipe joint 340 of the seal 300 is connected to the liquid outlet pipe 520. Thus, by using the pipe joint 340 of the seal 300 to cooperate with the liquid inlet pipe 510 or the liquid outlet pipe 520, the liquid inlet and outlet of the refrigerant of the shell-and-tube heat exchanger in this embodiment are realized, and the structure is simple and the manufacturing cost is relatively low.

[0070] The liquid inlet pipe 510 is used to guide the refrigerant into the cavity 220 for splitting. That is to say, the refrigerant is transported through the liquid inlet pipe 510 into the pipe joint 340, flows through the pipe joint 340 and the cavity 220 in sequence, and is split when flowing through the plurality of first connection holes 210, and then enters the upstream pipe sections 610 of the plurality of heat exchange tubes 600 respectively.

[0071] The liquid outlet pipe 520 is used to discharge the refrigerant converged in the cavity 220. That is to say, the refrigerant flows into the cavity 220 through the upstream pipe sections 610 of the plurality of heat exchange tubes 600 and the plurality of first connection holes 210 in sequence, so that the refrigerant converges in the cavity 220, and then flows into the liquid outlet pipe 520 through the pipe joint 340, so that the refrigerant is discharged.

[0072] In some embodiments, the seal 300 is a sealing plate 330 integrally formed and fits snugly into the opening of the cavity 220, thereby reducing the gap between the seal 300 and the cavity 220. In this way, when the seal 300 is installed in the cavity 220, the sealing effect between the seal 300 and the cavity 220 can be improved. Especially when the sealing plate 330 and the tube sheet 200 are assembled by welding, the welding can be made more uniform, greatly improving the welding quality and enhancing the sealing effect.

[0073] The seal 300 causes the refrigerant to flow in a folded manner after the opening of the cavity 220 is completely closed. For example Figure 5As shown, a sealing plate 330 is connected to the opening of the cavity 220 corresponding to the first branch pipe section 621 and the second branch pipe section 622, and the sealing plate 330 completely closes the opening of the cavity 220. After the refrigerant discharged from the first branch pipe section 621 flows outward and enters its corresponding cavity 220, the refrigerant is guided and restricted by the cavity 220 and the sealing plate 330, so that the refrigerant changes its flow direction and flows inward into the second branch pipe section 622. Alternatively, the seal 300 causes the opening of the cavity 220 to be partially closed, and after being connected to the liquid inlet pipe 510 or the liquid outlet pipe 520, the refrigerant is converged or diverged. That is to say, after the seal 300 is connected to the opening of the cavity 220, there is at least a notch that can communicate with the outside between the seal 300 and the opening of the cavity 220, so that the liquid inlet pipe 510 or the liquid outlet pipe 520 is directly communicated with the inside of the cavity 220 through the notch, so as to facilitate the liquid inlet pipe 510 to transport the refrigerant into the cavity 220 or the refrigerant inside the cavity 220 to be discharged through the liquid outlet pipe 520.

[0074] Optionally, the sealing plate 330 is provided with a through hole penetrating it in the inner and outer directions, and the liquid inlet pipe 510 or the liquid outlet pipe 520 is in interference fit with the through hole.

[0075] In some embodiments, as Figure 3 shown, the outer plate surface 331 of the sealing plate 330 is flush with the outer plate surface of the tube sheet 200, or the sealing plate 330 sinks into the cavity 220. That is to say, the sealing plate 330 does not protrude from the cavity 220, so as to obtain an open working space on the outside of the tube sheet 200. In this way, when the seal 300 is installed in the cavity 220, it will not be affected by the interference of the seals 300 installed in other cavities 220, so as to facilitate the installation of the seal 300 on the tube sheet 200 and improve the assembly efficiency and assembly quality of the shell-and-tube heat exchanger of the present invention. Especially in the case where the sealing plate 330 and the tube sheet 200 are assembled by welding, the interference of other seals 300 on the welding torch will be avoided, so that the welding torch can weld between the sealing plate 330 and the tube sheet 200 at any angle, thus having the effects of high welding efficiency and high welding quality.

[0076] In addition, after the sealing plate 330 is welded to the tube sheet 200, the outer plate surface of the sealing plate 330 and the outer plate surface of the tube sheet 200 will be completely fused into a plane, improving the integrity of the shell-and-tube heat exchanger in the embodiment of the present invention.

[0077] In some embodiments, as Figure 3As shown, in the case of confluence or divergence after the opening of the cavity 220 is closed by the seal 300, the shell-and-tube heat exchanger further includes a liquid equalizing member 400. The liquid equalizing member 400 is formed in or connected to the cavity 220 and is located inside the seal 300. It includes a liquid equalizing plate, and a plurality of flow equalizing holes 411 are defined in the liquid equalizing plate to cause the refrigerant to flow from outside to inside through the plurality of flow equalizing holes 411 and diverge to the heat exchange tubes 600. That is to say, the refrigerant in the cavity 220 has to pass through the liquid equalizing member 400 first to cause a certain divergence of the refrigerant. The diverged refrigerant then flows to the plurality of first connection holes 210, enabling the refrigerant to receive a more sufficient divergence effect, that is, the refrigerant can fully enter more of the first connection holes 210, ensuring that more heat exchange tubes 600 can receive the refrigerant, thereby improving the heat exchange effect.

[0078] The liquid equalizing plate also has confluence holes 421 that are opposite to the flow equalizing holes 411 in the inner and outer directions, guiding the refrigerant flowing out of the heat exchange tubes 600 to flow from inside to outside through the plurality of flow equalizing holes 411 and then through the confluence holes 421 for confluence and discharge, so as to cause the refrigerant to confluence through the liquid equalizing plate and enable the refrigerant to be discharged more smoothly.

[0079] Specifically, as Figure 13 shown, the liquid equalizing member 400 includes a confluence plate 410. The confluence plate 410 is connected to the outer side of the liquid equalizing plate, and the confluence plate 410 defines the confluence holes 421. The inner side surface of the seal 300 fits on the outer side plate surface of the confluence plate 410, and a second connection hole 332 with its inner end opposite to the confluence holes 421 is defined thereon. The outer end of the second connection hole 332 is used to directly or indirectly connect to the liquid inlet pipe 510 or the liquid outlet pipe 520 through a pipe joint 340.

[0080] In some embodiments, in the inner and outer directions, the thickness of the tube sheet 200 is 38 - 58 mm. Optionally, the thickness of the tube sheet 200 is 40 - 53 mm. Optionally, the thickness of the tube sheet 200 is 44 - 50 mm. Optionally, the thickness of the tube sheet 200 is 43 - 47 mm. On the one hand, the thickness dimension of the tube sheet 200 is sufficient to form the structures of the cavity 220 and the first connection holes 210, and the tube sheet 200 can ensure that no structural deformation occurs during use, giving the tube sheet 200 a long service life. On the other hand, it avoids the excessive thickness of the tube sheet 200, reduces the overall size of the shell-and-tube heat exchanger in this embodiment, and lowers the manufacturing cost.

[0081] Among them, the thickness of the tube sheet 200 includes but is not limited to 38 mm, 40 mm, 41 mm, 45 mm, 48 mm, 51 mm, 54 mm, 57 mm or 58 mm.

[0082] In the inner-outer direction, the hole length of the first connection hole 210 is 18 - 28 mm. Optionally, the hole length of the first connection hole 210 is 20 - 27 mm. Optionally, the hole length of the first connection hole 210 is 22 - 25 mm. Optionally, the hole length of the first connection hole 210 is 23 - 24 mm. Since the refrigerant needs to be in continuous contact inside the first connection hole 210, the first connection hole 210 has a large enough size to withstand the stress changes caused by temperature variations, enabling the tube sheet 200 to have a long service life.

[0083] Among them, the hole length of the first connection hole 210 includes but is not limited to 18 mm, 20 mm, 21 mm, 23 mm, 24 mm, 26 mm or 27 mm.

[0084] In some embodiments, as Figures 3 - 4 shown, the seal 300 includes a sealing plate 330 and a pipe joint 340 sealingly connected thereto. The sealing plate 330 covers the opening of the groove cavity 220, and the pipe joint 340 communicates with the groove cavity 220 at least through a second connection hole 332 defined on the sealing plate 330; alternatively, the seal 300 is a sealing plate 330 integrally formed and fittingly covering the opening of the groove cavity 220.

[0085] In the inner-outer direction, the depth of the groove cavity 220 is 20 - 40 mm. Optionally, the depth of the groove cavity 220 includes but is not limited to 20 mm, 22 mm, 25 mm, 29 mm, 33 mm, 35 mm, 39 mm or 40 mm. This not only provides a space in the groove cavity 220 for the refrigerant to flow and for the installation of the sealing plate 330, but also avoids the problem of the hole length of the first connection hole 210 being insufficient due to the overly large size of the groove cavity 220.

[0086] In the inner-outer direction, the thickness of the sealing plate 330 is 8 - 16 mm. Optionally, the thickness of the sealing plate 330 includes but is not limited to 8 mm, 9 mm, 10 mm, 12 mm, 15 mm or 16 mm. This makes the structure of the sealing plate 330 more stable, and enables the size of the sealing plate 330 to fit the groove cavity 220, so that the sealing plate 330 does not occupy too much space in the groove cavity 220, facilitating the flow and diffusion of the refrigerant in the groove cavity 220.

[0087] The distance between the two farthest sides of the sealing plate 330 is 80 - 120 mm, and the distance between the two nearest sides of the sealing plate 330 is 30 - 80 mm. Optionally, the distance between the two farthest sides of the sealing plate 330 includes, but is not limited to, 80 mm, 84 mm, 90 mm, 97 mm, 100 mm, 110 mm, or 120 mm. Optionally, the distance between the two nearest sides of the sealing plate 330 includes, but is not limited to, 30 mm, 36 mm, 45 mm, 55 mm, 63 mm, 70 mm, or 80 mm. Thus, the sealing plate 330 can have a more stable structure, and the service life of the shell-and-tube heat exchanger according to the embodiment of the present invention is improved.

[0088] In some embodiments, as Figure 7 and Figure 8 shown, a first limiting step 240 protrudes from the groove wall of the groove cavity 220, and a first limiting portion 241 that abuts against the inner side of the liquid equalizing member 400 is provided outside the first limiting step 240. Thus, the inner side of the liquid equalizing member 400 is restricted by the first limiting portion 241, so as to facilitate positioning the position of the liquid equalizing member 400 in the inner and outer directions and improve the installation efficiency of the liquid equalizing member 400.

[0089] The first limiting portion 241 of the first limiting step 240 and the outer end orifice 211 of the first connecting hole 210 are spaced apart in the inner and outer directions. That is to say, after the liquid equalizing member 400 is installed on the first limiting portion 241, the plurality of confluent holes 421 of the liquid equalizing member 400 are spaced apart from the outer end orifice 211 of the first connecting hole 210 by a certain distance in the inner and outer directions, so that the refrigerant flowing out after being shunted by the liquid equalizing member 400 can diverge sufficiently, and the refrigerant can be shunted more sufficiently, that is, the refrigerant can enter more first connecting holes 210 sufficiently, ensuring that more heat exchange tubes 600 can flow into the refrigerant, thereby improving the heat exchange effect.

[0090] In some embodiments, as Figure 7 and Figure 8As shown, the first limiting step 240 extends along the cavity wall of the cavity 220, so that after the liquid equalizing member 400 is installed on the first limiting step 240, it can be uniformly stressed along the cavity wall of the cavity 220, thereby improving the installation stability of the liquid equalizing member 400. And its two ends have end faces 242 with smooth curve shapes or inclined linear shapes that are smoothly transitioned with the cavity wall surface of the cavity 220, thereby reducing the processing difficulty of the first limiting step 240. And / or its outer side abuts against the inner side of the liquid equalizing member 400, and / or its inner side is in contact with the bottom surface of the cavity 220 of the cavity 220. That is to say, the outer side of the end face 242 abuts against the inner side of the liquid equalizing member 400, and the inner side of the end face 242 is in contact with the bottom surface of the cavity 220 of the cavity 220; or, the outer side of the end face 242 is spaced apart from the inner side of the liquid equalizing member 400, and the inner side of the end face 242 is in contact with the bottom surface of the cavity 220 of the cavity 220; the outer side of the end face 242 abuts against the inner side of the liquid equalizing member 400, and the inner side of the end face 242 is spaced apart from the bottom surface of the cavity 220 of the cavity 220; or, the outer side of the end face 242 is spaced apart from the inner side of the liquid equalizing member 400, and the inner side of the end face 242 is spaced apart from the bottom surface of the cavity 220 of the cavity 220.

[0091] Further, as Figures 1 - 3 shown, the cavity 220 is a rectangular groove with rounded corners at the four corners, so that the cavity 220 is adapted to a plurality of first connection holes 210 arranged in an array and a plurality of heat exchangers connected thereto. There are two first limiting steps 240, and the two first limiting steps 240 are relatively distributed at a pair of diagonals of the cavity 220. After the liquid equalizing member 400 is installed on the first limiting step 240, the liquid equalizing member 400 is more stable in force, thereby further improving the installation stability of the liquid equalizing member 400.

[0092] Further, a second limiting step 250 (not shown in the figure) is further protruded on the cavity wall of the cavity 220. A second limiting portion 251 that abuts against the inner side of the seal 300 is provided on the outer side of the second limiting step 250; and, the second limiting step 250 continuously or intermittently defines a sub-cavity 221 to urge the liquid equalizing member 400 to be blocked by the first limiting portion 241 after passing through the sub-cavity 221. The position of the sealing plate 330 in the inner and outer directions is restricted by the second limiting portion 251, so that the sealing plate 330 is more easily positioned during installation, and the installation efficiency is improved. In addition, the surface of the liquid equalizing member 400 is positioned and limited by the wall surface of the sub-cavity 221, further improving the installation stability of the liquid equalizing member 400.

[0093] In some other embodiments, as Figure 5As shown, a second limiting step 250 protrudes from the groove wall of the groove cavity 220. On the outer side of the second limiting step 250, there is a second limiting portion 251 that abuts against the inner side of the seal 300. The second limiting portion 251 is used to limit the position of the sealing plate 330 in the inner and outer directions, so that the sealing plate 330 is easier to position during installation, improving the installation efficiency. In the inner and outer directions, the second limiting portion 251 of the second limiting step 250 and the outer end orifice 211 of the first connection hole 210 are spaced apart. That is to say, after the sealing plate 330 is installed on the second limiting portion 251, there is a certain distance between the sealing plate 330 and the first connection hole 210, so that the refrigerant has a certain diffusion distance before entering the first connection hole 210 from the groove cavity 220, enabling the refrigerant to enter more first connection holes 210 and then enter multiple heat exchangers through these multiple first connection holes 210, thus improving the heat exchange efficiency.

[0094] Specifically, the second limiting step 250 is an annular step extending along the cavity wall of the groove cavity 220, and the second limiting portion 251 is the annular end face on the outer side of the second limiting step 250. The inner side face of the edge of the seal 300 abuts against the second limiting portion 251 of the second limiting step 250.

[0095] In some embodiments, the air conditioner according to the embodiment of the present invention includes a unit main body 700 and an air conditioner indoor unit 800.

[0096] The unit main body 700 includes a compressor 721, a first main heat exchanger 710, and a second main heat exchanger 722, and a refrigerant circulates among the compressor 721, the first main heat exchanger 710, and the second main heat exchanger 722. Among them, the first main heat exchanger 710 is the shell-and-tube heat exchanger in any of the above embodiments. The air conditioner indoor unit 800 includes an indoor heat exchanger 810, and a coolant circulates between the indoor heat exchanger 810 and the first main heat exchanger 710.

[0097] The compressor 721 sucks in the refrigerant from the first main heat exchanger 710, compresses the refrigerant, and then the refrigerant flows into the second main heat exchanger 722. After the refrigerant flows out, it enters the first main heat exchanger 710 again, enabling the refrigerant to exchange heat with the refrigerant circulating between the indoor heat exchanger 810 and the first main heat exchanger 710. Among them, the refrigerant circulating among the compressor 721, the first main heat exchanger 710, and the second main heat exchanger 722 can be Freon, and the refrigerant circulating between the indoor heat exchanger 810 and the first main heat exchanger 710 can be water.

[0098] The first main heat exchanger 710 of the air conditioner according to the embodiment of the present invention directly integrates the seal 300 into the groove cavity 220 of the tube sheet 200, and directly forms a structure for confluence, diversion or baffle on the tube sheet 200. Compared with the existing shell-and-tube heat exchanger that requires an end plate and a seal 300 to form a confluence, diversion or baffle structure on the tube sheet 200, the seal 300 directly replaces the end plate and the gasket, thus eliminating the relatively expensive gasket and also eliminating the technical requirement of high machining accuracy for the connection surface between the end plate and the tube sheet 200. Furthermore, it avoids the problems of high cost and easy seal failure caused by the installation of the end plate and the seal 300 on the tube sheet 200.

[0099] In some other embodiments, the air conditioner according to the embodiment of the present invention includes a unit main machine 700 and an air conditioner indoor unit 800.

[0100] The unit main machine 700 includes at least one first main heat exchanger 710 and at least two main machine units 720. The first main heat exchanger 710 is the shell-and-tube heat exchanger of any of the above embodiments. Each main machine unit 720 includes a compressor 721 and a second main heat exchanger 722 connected thereto; and the second main heat exchangers 722 of each main machine unit 720 are commonly connected to at least one first main heat exchanger 710. The air conditioner indoor unit 800 includes an indoor heat exchanger 810, and a refrigerant circulates between the indoor heat exchanger 810 and at least one first main heat exchanger 710. That is to say, the first main heat exchanger 710 cooperates with multiple main machine units 720, thereby greatly improving the refrigerant processing efficiency and the refrigeration effect of the air conditioner according to the embodiment of the present invention.

[0101] At this point, those skilled in the art should recognize that although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived from the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and determined to cover all these other variations or modifications.

Claims

1. A shell-and-tube heat exchanger, characterized in that, Comprising: A shell, the shell defining a lumen opening outward; A tube sheet, the tube sheet being formed on or connected to the opening of the lumen of the shell, and defining a first connection hole on its inner side that is connected to the opening of the lumen and is used to connect a heat exchange tube, and defining a cavity on the outer side that opens outward and is connected to a plurality of the first connection holes; A seal, the seal being hermetically fitted in the opening of the cavity to cause the opening of the cavity to be closed for the confluence, diversion or refraction of the refrigerant.

2. The shell-and-tube heat exchanger according to claim 1, wherein On the edge of the sealing plate, there is a sloped surface portion on the outer side, a groove opening outward is defined between the sloped surface portion and the wall of the cavity, and in the inner and outer directions, the proportion of the sloped surface on the edge of the sealing plate is greater than or equal to one-half.

3. The shell-and-tube heat exchanger according to claim 2, wherein On the wall of the cavity, there is a straight surface portion opposite to the sloped surface portion, and the groove portion is a single-sided V-shaped groove defined between the straight surface section and the sloped surface portion.

4. The shell-and-tube heat exchanger according to claim 1, wherein When the seal causes the opening of the cavity to be closed for the confluence or diversion of the refrigerant, the seal includes: A sealing plate, the sealing plate being integrally formed and fittingly engaged in the opening of the cavity, and further defining a second connection hole thereon; A pipe joint, the inner end of the pipe joint being hermetically inserted or integrally formed on the second connection hole of the sealing plate, and the outer end thereof being used to connect to an inlet pipe or an outlet pipe, wherein the inlet pipe is used to guide the refrigerant into the cavity for diversion, and the outlet pipe is used to discharge the confluent refrigerant in the cavity.

5. The shell-and-tube heat exchanger according to claim 4, wherein The outer plate surface of the sealing plate is flush with the outer plate surface of the tube sheet, or the sealing plate sinks into the cavity.

6. The shell-and-tube heat exchanger according to claim 1, wherein When the seal causes the opening of the cavity to be closed for the confluence or diversion, the shell-and-tube heat exchanger further includes: A liquid equalizing member, the liquid equalizing member being formed on or connected to the cavity and located inside the seal, and including a liquid equalizing plate, and a plurality of flow equalizing holes are defined on the liquid equalizing plate to cause the refrigerant to be diverted from outside to inside through the plurality of flow equalizing holes to the heat exchange tubes, or to guide the refrigerant flowing out of the heat exchange tubes to flow out after confluence through the plurality of flow equalizing holes from inside to outside.

7. The shell-and-tube heat exchanger according to claim 6, wherein A first limiting step is protruded on the wall of the cavity, a first limiting portion that stops inside the liquid equalizing member is provided on the outer side of the first limiting step, and in the inner and outer directions, the first limiting portion of the first limiting step and the outer end orifice of the first connection hole are spaced apart; And / or The first limiting step extends along the cavity wall of the groove cavity, and both ends thereof have end faces with smooth curved or inclined linear shapes that are smoothly transitioned with the cavity wall surface of the groove cavity, and / or its outer side abuts against the inner side of the liquid equalizing member, and / or its inner side is in contact with the bottom surface of the groove cavity of the groove cavity.

8. The shell-and-tube heat exchanger according to claim 7, wherein a second limiting step is further formed protruding on the groove wall of the groove cavity, and a second limiting portion that abuts against the inner side of the seal is provided outside the second limiting step; and, the second limiting step continuously or intermittently defines a sub-cavity to cause the liquid equalizing member to be blocked by the first limiting portion after passing through the sub-cavity.

9. The shell-and-tube heat exchanger according to claim 8, wherein the liquid equalizing member includes a confluence plate, the confluence plate is connected to the outer side of the liquid equalizing plate, and the confluence plate defines a confluence hole; the inner side surface of the seal fits on the outer side plate surface of the confluence plate, and a second connection hole with an inner end opposite to the confluence hole is defined thereon, and the outer end of the second connection hole is used to directly or indirectly connect to an inlet pipe or an outlet pipe through a pipe joint.

10. The shell-and-tube heat exchanger according to claim 1, wherein a second limiting step is formed protruding on the groove wall of the groove cavity, a second limiting portion that abuts against the inner side of the seal is provided outside the second limiting step, and in the inner and outer directions, the second limiting portion of the second limiting step and the outer end orifice of the first connection hole are spaced apart.

11. The shell-and-tube heat exchanger according to claim 1, wherein in the inner and outer directions, the thickness of the tube sheet is 38-58 mm, and the hole length of the first connection hole is 18-28 mm.

12. The shell-and-tube heat exchanger according to claim 1, wherein the seal includes a seal plate and a pipe joint sealingly connected thereto, the seal plate covers the opening of the groove cavity, and the pipe joint communicates with the groove cavity at least through a second connection hole defined on the seal plate; or, the seal is a seal plate integrally formed and fittingly covering the opening of the groove cavity; and, in the inner and outer directions, the depth of the groove cavity is 20-40 mm, the thickness of the seal plate is 8-16 mm, the distance between the farthest two sides of the seal plate is 80-120 mm, and the distance between the nearest two sides of the seal plate is 30-80 mm.

13. The shell-and-tube heat exchanger according to claim 1, wherein there are two groups of the groove cavities, and each group of the groove cavities has at least two; among at least two of the groove cavities in the same group, one of the groove cavities is a confluence groove cavity for refrigerant confluence, and the other groove cavity is a diversion groove cavity for refrigerant diversion; and, the seals are provided in one-to-one correspondence with the groove cavities.

14. An air conditioner, characterized in that, Including the shell-and-tube heat exchanger according to any one of claims 1-13.

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