Tube sheets, heat exchangers and air conditioning equipment

Abstract

This application discloses a tube sheet, a heat exchanger, and an air conditioning device. The tube sheet includes a tube sheet body with tube sheet holes arranged along its thickness direction. The wall of each tube sheet hole is configured with at least two expansion joint wall segments along the thickness direction, and each expansion joint wall segment has an expansion sealing groove. This application uses multiple expansion joint wall segments for the tube sheet holes, and provides an expansion sealing groove on each expansion joint wall segment. This structure allows the tube sheet to be mechanically expanded and sealed to the heat exchange tubes, making it suitable for expanding thicker tube sheets and heat exchange tubes. It is easy to operate, significantly improves expansion efficiency, and has low cost, making it suitable for mass production.

Description

Technical Field

[0001] This application relates to the field of heat exchanger technology, and more specifically, to a tube sheet, a heat exchanger, and an air conditioning device. Background Technology

[0002] Shell-and-tube heat exchangers are a commonly used type of heat exchanger, widely applied in industries such as petrochemicals, medical, and refrigeration due to their simple structure. In the refrigeration industry, shell-and-tube heat exchangers are mainly used in commercial central air conditioning systems. The heat exchange tubes are the core components of a shell-and-tube heat exchanger, responsible for heat transfer between different media. The heat exchange tubes typically need to be connected to the tube sheet of the shell-and-tube heat exchanger. This connection needs to withstand a certain pressure and meet sealing requirements to isolate different media within the heat exchanger and ensure no leakage.

[0003] In commercial central air conditioning units used in the refrigeration industry, heat exchange tubes are typically made of copper and mechanically expanded to connect with the tube sheet to achieve a seal. As the refrigeration industry increases its demand for cooling capacity per unit or raises the required operating pressure, the thickness of the tube sheet in shell-and-tube heat exchangers is becoming increasingly critical, and the torque required for the expansion connection between the tube sheet and heat exchange tubes is also rising. Conventional mechanical expansion connection methods are insufficient to meet the required torque output. Furthermore, if the seal between the heat exchange tube and the tube sheet fails, it will lead to refrigerant leakage in the air conditioning unit, ultimately causing the entire unit to malfunction.

[0004] Currently, for the expansion joint of ultra-thick tube sheets and heat exchange tubes, hydraulic methods are typically used to provide the expansion torque and achieve a sealed connection between the tube sheet and the heat exchange tubes. The advantage of hydraulic methods is that the hydraulic expansion pressure is evenly distributed, causing the tube wall to expand uniformly and fit into the tube sheet hole. This avoids the tube sheet deformation or cracks caused by local stress concentration in mechanical expansion joints. Furthermore, the high-pressure liquid expansion effect can ensure that the copper heat exchange tubes fit fully into the hole wall of the tube sheet, forming a continuous metal-metal contact. Its sealing performance and tensile strength are superior to traditional mechanical expansion joints, making it more suitable for the expansion joint of ultra-thick tube sheets and heat exchange tubes.

[0005] However, hydraulic expansion is not flexible enough. Unlike traditional mechanical expansion, it cannot use a robotic arm to flexibly insert into the heat exchange tubes for expansion. Furthermore, each expansion requires pressurization, pressure holding, and pressure release operations, resulting in low expansion efficiency and high cost, making it unsuitable for mass production. Utility Model Content

[0006] The purpose of this application is to provide a tube sheet, heat exchanger, and air conditioning equipment. The tube sheet has multiple expansion joint wall sections on the hole wall, and each expansion joint wall section is provided with an expansion joint sealing groove. The tube sheet with this structure can be mechanically expanded and sealed to the heat exchange tube. It is suitable for expanding tube sheets and heat exchange tubes with larger thicknesses, and is easy to operate. It can greatly improve the expansion efficiency, while having a low cost and being suitable for mass production.

[0007] To achieve the above objectives, in a first aspect, this application provides a tube sheet, including a tube sheet body, wherein the tube sheet body is provided with tube sheet holes arranged along the thickness direction of the tube sheet body, and the wall of the tube sheet holes is provided with at least two expansion joint wall sections along the thickness direction of the tube sheet body, and each expansion joint wall section is provided with an expansion joint sealing groove.

[0008] In the implementation of the above technical solution, the tube sheet body is provided with tube sheet holes arranged along its thickness direction. The tube sheet holes are used to connect the tube sheet and the heat exchange tubes. The hole wall is divided into at least two expansion joint hole wall sections along the thickness direction of the tube sheet body, and each expansion joint hole wall section is provided with an expansion joint sealing groove. The tube sheet with this structure can be mechanically expanded and sealed to the heat exchange tubes. Specifically, during the expansion joint process between the tube sheet and the heat exchange tubes, the expansion joint sealing groove of each expansion joint hole wall section is squeezed and filled by the heat exchange tubes, forming a "groove-protrusion" mechanical interlocking structure. The expansion joint sealing grooves of multiple expansion joint hole wall sections increase the number of mechanical interlocking structures. Furthermore, a segmented expansion joint method can be adopted during mechanical expansion. This design allows the total thickness of the tube sheet to be divided into multiple independent segments corresponding to the expansion joint wall sections. Stress is released and locked segment by segment, ensuring uniform stress distribution in the expansion joint sealing groove area of ​​each expansion joint wall section. It also prevents elastic rebound of heat exchange tubes after a single expansion joint of ultra-thick tube sheets, improving the overall pull-out resistance and shear strength after expansion. Through mechanical interlocking and torque decomposition, it breaks through the torque limit of a single expansion joint, compensating for the leakage risk of traditional mechanical expansion joints. Tube sheets with this structure are particularly suitable for expanding tube sheets and heat exchange tubes with larger and ultra-thickness tube sheets. They do not require hydraulic expansion joints, are easy to operate, greatly improve expansion efficiency, and have lower costs, making them suitable for mass production.

[0009] In a preferred embodiment of this application, there are overlapping hole wall sections between adjacent expansion joint hole sections.

[0010] In the implementation of the above technical solution, there is an overlapping hole wall section between adjacent expansion joint hole sections. The overlapping hole wall section can effectively avoid the formation of leakage expansion zone when the tube sheet and heat exchange tube are mechanically expanded. Since the range of plastic deformation of the tube wall by the expansion head is limited, the overlapping hole wall section of adjacent expansion joint hole sections can effectively avoid gaps caused by sufficient deformation between adjacent sections due to possible positioning errors of the equipment or material springback. This effectively avoids the formation of expansion joint leakage channels, thereby more effectively ensuring the sealed connection of the mechanical expansion joint between the tube sheet and heat exchange tube, and further improving the reliability of the mechanical expansion joint between the tube sheet and heat exchange tube.

[0011] In a preferred embodiment of this application, the expansion sealing groove is provided circumferentially along the wall section of the expansion hole.

[0012] In the implementation of the above technical solution, the expansion sealing groove is set along the circumference of the expansion hole wall section, that is, the expansion sealing groove is a ring-shaped and continuous groove structure. This groove structure enables a more stable and reliable sealing connection when the tube sheet and heat exchange tube are mechanically expanded.

[0013] In a preferred embodiment of this application, each of the expansion joint hole wall sections is provided with an expansion joint sealing groove;

[0014] Alternatively, each of the expansion joint hole wall sections is provided with multiple parallel expansion sealing grooves.

[0015] In the implementation of the above technical solution, setting an expansion sealing groove on each expansion hole wall section facilitates the processing of the expansion sealing groove on the hole wall of the tube sheet, and the tube sheet and heat exchange tube can achieve the effect of mechanical expansion sealing connection with a minimum number of expansion sealing grooves. Setting multiple parallel expansion sealing grooves on each expansion hole wall section can significantly increase the number of "groove-protrusion" mechanical interlocking structures, thereby better locking the stress and making the stress distribution more uniform. This results in an extremely stable and reliable sealing connection when the tube sheet and heat exchange tube are mechanically expanded.

[0016] In a preferred embodiment of this application, the tube sheet body has a plurality of tube sheet holes arranged along the thickness direction of the tube sheet body, and the wall of each tube sheet hole is provided with at least two expansion joint wall segments along the thickness direction of the tube sheet body.

[0017] In the implementation of the above technical solution, there are multiple tube sheet holes, and the wall of each tube sheet hole is set with at least two expansion joint hole wall sections, which can realize the installation of multiple heat exchange tubes on the tube sheet, so that the heat exchanger has a better heat exchange effect. At the same time, it can also ensure that multiple heat exchange tubes are mechanically expanded and sealed to the tube sheet.

[0018] In a preferred embodiment of this application, the expansion joint sealing groove is an expansion joint sealing groove with a V-shaped cross-section.

[0019] In the implementation of the above technical solution, the use of V-shaped expansion joint sealing grooves can facilitate the processing of expansion joint sealing grooves on the borehole walls of the tube sheet. Furthermore, the V-shaped expansion joint sealing grooves enable the tube sheet and heat exchange tubes to have a good sealing connection effect during mechanical expansion joint.

[0020] In a preferred embodiment of this application, the expansion joint sealing groove is an expansion joint sealing groove with a U-shaped cross-section.

[0021] In the implementation of the above technical solution, the use of U-shaped expansion sealing grooves can facilitate the processing of expansion sealing grooves on the borehole walls of the tube sheet. Furthermore, the U-shaped expansion sealing grooves enable the tube sheet and heat exchange tubes to have a good sealing connection effect during mechanical expansion.

[0022] Secondly, this application provides a heat exchanger, including heat exchange tubes and the aforementioned tube sheet, wherein the heat exchange tubes are expanded and connected to the tube sheet through holes in the tube sheet.

[0023] In the implementation of the above technical solution, the tube sheet of the heat exchanger adopts the tube sheet described above, which allows the tube sheet of the heat exchanger to be mechanically expanded and sealed to the heat exchange tubes without the need for hydraulic expansion. This method is easy to operate, greatly improves expansion efficiency, and has a low cost, making it suitable for mass production of heat exchangers.

[0024] In a preferred embodiment of this application, the heat exchange tube is provided with an expansion sealing protrusion corresponding to the expansion sealing groove.

[0025] In the implementation of the above technical solution, the position and shape of the expansion sealing ridge on the heat exchange tube correspond to the expansion sealing groove on the hole wall of the tube sheet. This facilitates the expansion of the heat exchange tube during mechanical expansion and makes it easier for the corresponding part of the heat exchange tube to be squeezed and filled into the expansion sealing groove, thereby improving the expansion efficiency.

[0026] Thirdly, this application provides an air conditioning device, including the heat exchanger described above.

[0027] In the process of implementing the above technical solution, the air conditioning equipment adopts the above heat exchanger, which can minimize the failure of the sealing joint between the heat exchange tube and the tube sheet during use, and avoid refrigerant leakage of the air conditioning unit caused by such situations, thereby avoiding the paralysis of the entire air conditioning unit and effectively reducing the failure rate of the air conditioning equipment.

[0028] This application discloses a tube sheet, heat exchanger, and air conditioning equipment, which, compared with the prior art, have at least the following advantages:

[0029] The tube sheet of this application has tube sheet holes arranged along its thickness direction on the tube sheet body. The tube sheet holes are used to connect the tube sheet and the heat exchange tubes. The hole wall is divided into at least two expansion hole wall sections along the thickness direction of the tube sheet body, and each expansion hole wall section is provided with an expansion sealing groove. The tube sheet with this structure can be mechanically expanded and sealed to the heat exchange tubes. It is especially suitable for expanding tube sheets with larger and ultra-large thicknesses to heat exchange tubes. It does not require hydraulic expansion and is easy to operate. It can greatly improve the expansion efficiency and has a low cost, making it suitable for mass production.

[0030] The heat exchanger of this application allows the tube sheet and heat exchange tubes to be mechanically expanded and sealed to the heat exchange tubes, eliminating the need for hydraulic expansion. This method is easy to operate, greatly improves expansion efficiency, and is also low in cost, making it suitable for mass production of heat exchangers.

[0031] The air conditioning equipment of this application can minimize the failure of the sealing joint between the heat exchanger tubes and the tube sheet during use, and avoid refrigerant leakage of the air conditioning unit caused by such failure, thereby preventing the entire air conditioning unit from shutting down and effectively reducing the failure rate of the air conditioning equipment. Attached Figure Description

[0032] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments of this application will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a three-dimensional structural schematic diagram of the tube sheet provided in the embodiments of this application;

[0034] Figure 2 This is a cross-sectional view of the tube sheet provided in the embodiments of this application;

[0035] Figure 3 This is a partial cross-sectional view of the tube sheet and heat exchange tubes mechanically expanded together according to an embodiment of this application.

[0036] Figure 4 This is a three-dimensional schematic diagram of a partial structure of the heat exchanger provided in the embodiments of this application;

[0037] Figure 5 This is an exploded view of a partial structure of the heat exchanger provided in an embodiment of this application;

[0038] Figure 6 This is a cross-sectional structural diagram of a heat exchanger provided in an embodiment of this application.

[0039] Reference numerals: 11-Tube sheet body; 12-Tube sheet hole; 121-Expansion joint hole wall section; 1211-Expansion joint sealing groove; 1212-Overlapping hole wall section; 20-Heat exchange tube; 30-Shell. Detailed Implementation

[0040] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0041] In this application, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0042] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0043] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or a point connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0044] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0045] For the expansion joint of ultra-thick tube sheets and heat exchanger tubes, conventional mechanical expansion joint methods are insufficient to achieve the high torque required for such joints. Currently, hydraulic methods are commonly used to provide the expansion torque and achieve a sealed connection between the tube sheet and heat exchanger tubes. However, hydraulic expansion joints lack flexibility, unlike traditional mechanical expansion joints which use robotic arms to flexibly insert into the heat exchanger tubes. Furthermore, each expansion joint requires pressurization, pressure holding, and pressure release operations, resulting in low efficiency and high cost, making it unsuitable for mass production.

[0046] To address the problems in the prior art, this application provides a tube sheet, a heat exchanger, and an air conditioning device. The tube sheet has multiple expansion joint wall sections for the tube sheet holes, and each expansion joint wall section is provided with an expansion joint sealing groove. This type of tube sheet can be mechanically expanded and sealed to the heat exchange tubes. It is suitable for expanding tube sheets and heat exchange tubes with larger thicknesses, is easy to operate, can greatly improve expansion efficiency, and has a low cost, making it suitable for mass production.

[0047] Example 1

[0048] See Figures 1 to 3 ,in, Figure 1 and Figure 2 These are, respectively, a three-dimensional structural schematic diagram and a cross-sectional structural schematic diagram of the tube sheet provided in the embodiments of this application; Figure 3 This is a partial cross-sectional view of the tube sheet and heat exchange tube 20 mechanically expanded and connected according to an embodiment of this application.

[0049] The tube sheet of this application embodiment includes a tube sheet body 11. The tube sheet body 11 is provided with tube sheet holes 12 arranged along the thickness direction of the tube sheet body 11. The hole wall of the tube sheet hole 12 is provided with at least two expansion joint hole wall sections 121 along the thickness direction of the tube sheet body 11. Each expansion joint hole wall section 121 is provided with an expansion joint sealing groove 1211.

[0050] In this embodiment, the tube sheet and tube sheet body 11 are flat cylindrical in shape, and the tube sheet hole 12 is disposed in the middle of the tube sheet body 11; it can be understood that the tube sheet hole 12 is used for the connection between the tube sheet and the heat exchange tube 20.

[0051] In this embodiment, there are multiple tube sheet holes 12 provided on the tube sheet body 11 along the thickness direction of the tube sheet body 11. The multiple tube sheet holes 12 are regularly distributed. It should be noted that in other embodiments, the number of tube sheet holes 12 can also be one. The specific number of tube sheet holes 12 can be set according to the needs of the heat exchanger. In this embodiment, when there are multiple tube sheet holes 12, the hole wall of each tube sheet hole 12 is provided with at least two expansion joint hole wall segments 121 along the thickness direction of the tube sheet body 11. It can be understood that the number of expansion joint hole wall segments 121 provided on the hole wall of each tube sheet hole 12 can be the same or different. Generally speaking, the number of expansion joint hole wall segments 121 provided on the hole wall of each tube sheet hole 12 is the same.

[0052] The tube sheet in this embodiment can be mechanically expanded and sealed to the heat exchange tube 20. This method is particularly suitable for expanding tube sheets with larger or even larger thicknesses to the heat exchange tube 20. Larger thickness tube sheets refer to those with a thickness of 8 mm or more. Specifically, during the expansion process between the tube sheet and the heat exchange tube 20, the expansion sealing groove 1211 of each expansion hole wall segment 121 is filled by the heat exchange tube 20, forming a "groove-protrusion" mechanical interlocking structure. The expansion sealing grooves 1211 of multiple expansion hole wall segments 121 add multiple mechanical interlocking structures. Furthermore, segmented expansion can be used during mechanical expansion. Segmented expansion can divide the total thickness of the tube sheet into multiple independent segments corresponding to the expansion hole wall segments 121, releasing and locking stress segment by segment. This ensures uniform stress distribution in the expansion sealing groove 1211 area of ​​each expansion hole wall segment 121, and also prevents elastic rebound of the heat exchange tube 20 after a single expansion of the ultra-thick tube sheet, thereby improving the overall pull-out resistance and shear strength after expansion. Through mechanical interlocking effect and torque decomposition, the torque limit of a single expansion can be broken, compensating for the leakage risk of traditional mechanical expansion.

[0053] In this embodiment, the expansion sealing groove 1211 is arranged circumferentially along the expansion hole wall section 121, that is, the expansion sealing groove 1211 is an annular and continuous groove structure. This groove structure enables a more stable and reliable sealing connection when the tube sheet and the heat exchange tube 20 are mechanically expanded.

[0054] It should be noted that in other embodiments, the expansion joint sealing groove 1211 may also adopt other structures. For example, the expansion joint sealing groove 1211 may be a discontinuous groove structure. Specifically, it may be a groove structure that is discontinuously arranged along the circumference of the expansion joint hole wall section 121; or it may be a non-complete groove structure. Specifically, it may be a groove structure that is partially arranged along the circumference of the expansion joint hole wall section 121, but not distributed throughout the circumference of the expansion joint hole wall section 121.

[0055] In this embodiment, each expansion hole wall section 121 is provided with a plurality of parallel expansion sealing grooves 1211. The plurality of parallel expansion sealing grooves 1211 can significantly increase the number of "groove-protrusion" mechanical interlocking structures, thereby better locking the stress and making the stress distribution more uniform. This allows the tube sheet and heat exchange tube 20 to have an extremely stable and reliable sealing connection when mechanically expanding.

[0056] Understandably, in other embodiments, the plurality of expansion sealing grooves 1211 provided on the expansion hole wall section 121 may also be non-parallel; preferably, the plurality of expansion sealing grooves 1211 provided on the expansion hole wall section 121 are arranged in parallel.

[0057] In this embodiment, the multiple parallel expansion sealing grooves 1211 provided on each expansion hole wall section 121 are connected. The multiple expansion sealing grooves 1211 provided in a connected manner can further improve the sealing connection effect between the tube sheet and the heat exchange plate. It can be understood that in other embodiments, the multiple parallel expansion sealing grooves 1211 may also be non-connected.

[0058] In this embodiment of the tube sheet, the tube sheet body 11 is provided with tube sheet holes 12 arranged along its thickness direction. The tube sheet holes 12 are used to connect the tube sheet and the heat exchange tubes 20. The hole wall of the tube sheet holes 12 is divided into at least two expansion joint hole wall sections 121 along the thickness direction of the tube sheet body 11, and each expansion joint hole wall section 121 is provided with an expansion joint sealing groove 1211. The tube sheet with this structure can be mechanically expanded and sealed to the heat exchange tubes 20. It is especially suitable for expanding tube sheets with larger thickness and ultra-large thickness to the heat exchange tubes 20. It does not require hydraulic expansion and is easy to operate. It can greatly improve the expansion efficiency and has a low cost, making it suitable for mass production.

[0059] Example 2

[0060] See Figures 1 to 3 Based on the above embodiment one, the difference between this embodiment and embodiment one is that in this embodiment, each expansion joint hole wall section 121 of the tube sheet is provided with an expansion joint sealing groove 1211.

[0061] An expansion sealing groove 1211 is provided on each expansion joint hole wall section 121, which facilitates the processing of the expansion sealing groove 1211 on the hole wall of the tube sheet hole 12, and the tube sheet and heat exchange tube 20 can be mechanically expanded and sealed by a minimum number of expansion sealing grooves 1211.

[0062] Example 3

[0063] See Figures 1 to 3Based on the above embodiment one or embodiment two, the difference between this embodiment and embodiment one or embodiment two is that, in this embodiment, the tube sheet has overlapping hole wall sections 1212 between adjacent expansion joint hole wall sections 121, such as... Figure 3 As shown, the middle position of the hole wall of the tube sheet hole 12 is marked as the overlapping hole wall section 1212 between two adjacent expansion joint hole wall sections 121 on the left and right.

[0064] Understandably, when the wall of the tube sheet hole 12 is set as three or more expansion joint wall segments 121 along the thickness direction of the tube sheet body 11, there are overlapping wall segments 1212 between any adjacent expansion joint wall segments 121.

[0065] There is an overlapping hole wall section 1212 between adjacent expansion joint hole wall sections 121. The overlapping hole wall section 1212 can effectively avoid the formation of leakage expansion zone when the tube sheet and heat exchange tube 20 are mechanically expanded. Since the range of plastic deformation of the tube wall of the heat exchange tube 20 by the expansion head is limited, the overlapping hole wall section 1212 of adjacent expansion joint hole wall sections 121 can effectively avoid the gap caused by sufficient deformation between two adjacent sections due to possible positioning errors of the equipment or material springback. This effectively avoids the formation of expansion joint leakage channel, thereby more effectively ensuring the sealed connection of the mechanical expansion joint between the tube sheet and heat exchange tube 20, and further improving the reliability of the mechanical expansion joint between the tube sheet and heat exchange tube 20.

[0066] Furthermore, for the copper heat exchange tube 20, there is residual stress after expansion joint. Only by setting overlapping sections can the stress distribution be made more continuous, avoiding local stress concentration caused by abrupt segmentation.

[0067] Example 4

[0068] See Figures 1 to 3 Based on any of the embodiments one to three above, the tube sheet of this embodiment has an expansion joint sealing groove 1211 with a V-shaped cross-section, as specifically seen in the following figures. Figure 3 The expansion joint sealing groove 1211 in the middle.

[0069] The use of a V-shaped expansion joint sealing groove 1211 facilitates the processing of the expansion joint sealing groove 1211 on the hole wall of the tube sheet hole 12. Furthermore, the V-shaped expansion joint sealing groove 1211 enables the tube sheet and heat exchange tube 20 to have a good sealing connection effect during mechanical expansion.

[0070] Example 5

[0071] See Figures 1 to 3 Based on any of the embodiments one to three above, the tube sheet of this embodiment has an expansion joint sealing groove 1211 with a U-shaped cross-section. Specifically, it can be... Figure 3The V-shaped expansion joint sealing groove 1211 in the middle is adjusted to a U-shaped expansion joint sealing groove 1211.

[0072] The use of a U-shaped expansion joint sealing groove 1211 facilitates the processing of the expansion joint sealing groove 1211 on the hole wall of the tube sheet hole 12. Furthermore, the U-shaped expansion joint sealing groove 1211 enables the tube sheet and heat exchange tube 20 to have a good sealing connection effect during mechanical expansion.

[0073] It should be noted that in other embodiments, the expansion joint sealing groove 1211 may also take other shapes. For example, the expansion joint sealing groove 1211 may also take the shape of a square cross section. Here, other shapes that the expansion joint sealing groove 1211 may also take will not be listed.

[0074] Example 6

[0075] See Figures 1 to 6 This application provides a heat exchanger, including heat exchange tubes 20 and tube sheets of any one of the above embodiments one to five. The heat exchange tubes 20 are connected to the tube sheet through tube sheet holes 12 by expansion joint.

[0076] For example, the heat exchanger in the embodiments of this application may be a shell and tube heat exchanger.

[0077] In this embodiment, a shell 30 is provided between the two tube sheets of the heat exchanger. When the tube sheets of the heat exchanger are sealed to the heat exchange tubes 20, a closed space can be formed inside the shell 30.

[0078] Preferably, the heat exchange tube 20 can be made of copper.

[0079] The heat exchanger of this application embodiment uses the tube sheet of any one of the embodiments 1 to 5 above, which allows the tube sheet of the heat exchanger to be mechanically expanded and sealed to the heat exchange tube 20 without the need for hydraulic expansion. This method is easy to operate, greatly improves expansion efficiency, and has a low cost, making it suitable for mass production of heat exchangers.

[0080] Example 7

[0081] See Figures 1 to 6 Based on the above embodiment six, the difference between this embodiment and embodiment six is ​​that the heat exchanger in this embodiment has an expansion sealing protrusion on the heat exchange tube 20 corresponding to the expansion sealing groove 1211.

[0082] Understandably, the heat exchange tube 20 is provided with an expansion sealing protrusion corresponding to the expansion sealing groove 1211, that is, the position and shape of the expansion sealing protrusion provided on the heat exchange tube 20 correspond to the expansion sealing groove 1211 on the hole wall of the tube sheet hole 12.

[0083] The design of the expansion joint sealing ridge facilitates the expansion of the heat exchange tube 20 during mechanical expansion jointing, making it easier for the corresponding part of the heat exchange tube 20 to be squeezed and filled into the expansion joint sealing groove 1211, thereby improving the expansion jointing efficiency.

[0084] Example 8

[0085] See Figures 1 to 6 This application provides an air conditioning device, including the heat exchanger of Embodiment Six or Embodiment Seven described above.

[0086] For example, the air conditioning equipment in this application embodiment can be a commercial central air conditioning system.

[0087] The air conditioning equipment in this application uses the heat exchanger of Embodiment Six or Embodiment Seven, which can minimize the failure of the sealing joint between the heat exchange tube 20 and the tube sheet during use, and avoid refrigerant leakage of the air conditioning unit caused by such situations, thereby avoiding the paralysis of the entire air conditioning unit and effectively reducing the failure rate of the air conditioning equipment.

[0088] In all the above embodiments, "large" and "small" are relative terms, "more" and "less" are relative terms, and "upper" and "lower" are relative terms. The embodiments of this application will not elaborate further on the expression of such relative terms.

[0089] It should be understood that phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" throughout the specification mean that a specific feature, structure, or characteristic related to an embodiment is included in at least one embodiment of this application. Therefore, phrases such as "in one embodiment," "in this embodiment," "in this application embodiment," or "as an optional implementation" appearing throughout the specification do not necessarily refer to the same embodiment. Furthermore, these specific features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Those skilled in the art should also understand that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily essential to this application.

[0090] In the various embodiments of this application, it should be understood that the sequence number of each process does not necessarily imply the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of this application.

[0091] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of protection of the claims.

Claims

1. A tube sheet, characterized in that, The tube sheet body (11) is provided with tube sheet holes (12) arranged along the thickness direction of the tube sheet body (11). The wall of the tube sheet hole (12) is provided with at least two expansion joint wall sections (121) along the thickness direction of the tube sheet body (11). Each expansion joint wall section (121) is provided with an expansion joint sealing groove (1211).

2. The tube sheet according to claim 1, characterized in that, There are overlapping hole wall sections (1212) between adjacent expansion joint hole wall sections (121).

3. The tube sheet according to claim 1, characterized in that, The expansion joint sealing groove (1211) is arranged circumferentially along the expansion joint hole wall section (121).

4. The tube sheet according to claim 1, characterized in that, Each of the expansion joint hole wall sections (121) is provided with an expansion joint sealing groove (1211); Alternatively, each of the expansion joint hole wall sections (121) is provided with a plurality of parallel expansion joint sealing grooves (1211).

5. The tube sheet according to claim 1, characterized in that, The tube sheet body (11) has multiple tube sheet holes (12) arranged along the thickness direction of the tube sheet body (11), and the hole wall of each tube sheet hole (12) is arranged along the thickness direction of the tube sheet body (11) with at least two expansion joint hole wall sections (121).

6. The tube sheet according to any one of claims 1-5, characterized in that, The expansion joint sealing groove (1211) is an expansion joint sealing groove (1211) with a V-shaped cross-section.

7. The tube sheet according to any one of claims 1-5, characterized in that, The expansion joint sealing groove (1211) is an expansion joint sealing groove (1211) with a U-shaped cross-section.

8. A heat exchanger, characterized in that, It includes a heat exchange tube (20) and a tube sheet as described in any one of claims 1-7, wherein the heat exchange tube (20) is connected to the tube sheet by an expansion joint through a hole (12) in the tube sheet.

9. The heat exchanger according to claim 8, characterized in that, The heat exchange tube (20) is provided with an expansion sealing protrusion corresponding to the expansion sealing groove (1211).

10. An air conditioning device, characterized in that, Includes the heat exchanger as described in claim 9.

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