Heat exchangers, condensers and air conditioning systems

Abstract

This utility model provides a heat exchanger, a condensing device, and an air conditioning system. A heat exchanger includes: a fixed bracket; a heat exchange tube; and a supporting bracket. The heat exchanger, condensing device, and air conditioning system provided by this utility model, by welding the ends of the heat exchange tube to the fixed bracket, and using a supporting bracket that only supports the heat exchange tube without welding it, reduces the number of weld points in the heat exchanger, thus lowering production difficulty. Furthermore, the relative movement between the supporting bracket and the heat exchange tube prevents weld cracking when the heat exchange tube deforms under thermal stress, reduces mutual interference between pipes, greatly improves stress distribution, ensures adaptive deformation of the heat exchange tube under complex thermal expansion and stress conditions, improves leakage problems, and enhances the structural stability and reliability of the condensing device and air conditioning system.

Description

Technical Field

[0001] This utility model relates to the field of heat exchange structure technology, and in particular to a heat exchanger, condensing device and air conditioning system. Background Technology

[0002] Existing heat exchangers use straight heat exchange tubes welded together with bent tubes to connect the two tubes. Specifically, the two ends of the straight heat exchange tubes are welded to two end plates, and then the bent tube is welded to one of the end plates to connect the two tubes. Both the connection points between the straight tube and the end plate, and between the bent tube and the end plate, require weld points for fixation. Due to the large number of pipes inside the heat exchanger, these weld points are very dense, and the heat exchange tubes have no deformation allowance. During operation, the heat exchange tubes are subjected to thermal stress and deformation of the pipes themselves, leading to weld cracks and liquid leaks, causing serious after-sales problems and significant economic losses. Utility Model Content

[0003] To address the technical problems of existing technologies where both ends of the heat exchange tube are welded and fixed, resulting in an inability to adapt to stress deformation, weld cracking, and liquid leakage, a heat exchanger, condenser, and air conditioning system are provided that only one end of the heat exchange tube is welded, while the other parts are only supported to accommodate the stress deformation of the heat exchange tube and improve structural reliability.

[0004] A heat exchanger, comprising:

[0005] Fixed bracket;

[0006] A heat exchange tube having an inlet and an outlet, wherein the portion of the heat exchange tube located at the inlet and the portion of the heat exchange tube located at the outlet are both fixedly connected to the fixed bracket;

[0007] A support bracket is provided at the middle of the heat exchange tube and / or at a portion of the heat exchange tube away from the fixed bracket. The heat exchange tube is supported on the support bracket, and the support bracket and the heat exchange tube are movable relative to each other.

[0008] The number of heat exchange tubes is multiple, and all the heat exchange tubes are distributed in at least one column, and all the heat exchange tubes in the same column are fixedly connected to the same fixed support.

[0009] The number of heat exchange tubes is multiple, and all the heat exchange tubes are distributed in at least one column, and all the heat exchange tubes in the same column are supported by the same support bracket.

[0010] The heat exchange tube includes two straight pipe sections and a bend section. The first ends of the two straight pipe sections are respectively connected to the two ends of the bend section. The second ends of the two straight pipe sections are fixedly connected to the fixed bracket. The support bracket supports the heat exchange tube between the first end and the second end; and / or, the support bracket is located at the portion of the heat exchange tube near the second end.

[0011] The support bracket is located at the connection point between the second end and the bend section.

[0012] The heat exchange tube is U-shaped, and the bent section constitutes the bent portion of the U-shape.

[0013] The heat exchanger also includes an air inlet pipe, which is mounted on the fixed support and located above the fixed support. All the inlets are connected to the air inlet pipe.

[0014] The heat exchanger further includes a first flow path sealing bracket, which is disposed on the fixed bracket and together with the fixed bracket forms a refrigerant inlet flow path. All inlets of all heat exchange tubes fixedly connected to the same fixed bracket are connected to the same refrigerant inlet flow path, and the air inlet pipe is connected to the refrigerant inlet flow path.

[0015] The heat exchanger also includes a liquid collecting pipe, which is located at the lower part of the fixed support and on the side of the fixed support away from the heat exchange tube. All the outlets are connected to the liquid collecting pipe.

[0016] The heat exchanger further includes a second flow path sealing bracket, which is disposed on the fixed bracket and together with the fixed bracket forms a refrigerant outflow path. All outlets of all heat exchange tubes fixedly connected to the same fixed bracket are connected to the same refrigerant outflow path, and the liquid collection pipe is connected to the refrigerant outflow path.

[0017] A condensation device, comprising the heat exchanger described above.

[0018] An air conditioning system includes the heat exchanger or the condenser described above.

[0019] The heat exchanger, condensing device, and air conditioning system provided by this utility model weld the ends of the heat exchange tubes to a fixed bracket, while the supporting bracket only supports the heat exchange tubes without welding them. This reduces the number of weld points in the heat exchanger, thus lowering the production difficulty. Furthermore, the relative movement between the supporting bracket and the heat exchange tubes prevents weld cracking when the heat exchange tubes are deformed under thermal stress. This reduces the mutual influence between pipes, greatly improves stress distribution, ensures adaptive deformation of the heat exchange tubes under complex thermal expansion and thermal stress conditions, improves leakage problems, and enhances the stability of the structure and the reliability of the condensing device and air conditioning system. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of a heat exchanger provided in an embodiment of the present utility model;

[0021] Figure 2 Another structural schematic diagram of the heat exchanger provided in this embodiment of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the heat exchange tube, fixed bracket, and support bracket provided in an embodiment of the present utility model;

[0023] Figure 4 Another structural schematic diagram of the heat exchange tube, fixed bracket, and support bracket provided in an embodiment of this utility model;

[0024] Figure 5 Another structural schematic diagram of the heat exchange tube, fixed bracket, and support bracket provided in an embodiment of this utility model;

[0025] Figure 6 A schematic diagram of the structure of the support bracket near the second end of the heat exchange tube provided in an embodiment of this utility model;

[0026] Figure 7 This is a schematic diagram of the structure of the support bracket in the middle of the heat exchange tube provided in an embodiment of the present utility model;

[0027] Figure 8 This is a schematic diagram of the structure of the fixing bracket provided in an embodiment of the present utility model;

[0028] Figure 9 A schematic diagram of the condensation device provided in the embodiment of this utility model;

[0029] Figure 10 A schematic diagram of the heat exchanger being extracted from the condensing device according to an embodiment of this utility model;

[0030] In the picture:

[0031] 1. Fixed bracket; 2. Heat exchange tube; 3. Support bracket; 21. Straight pipe section; 22. Bend pipe section; 4. Inlet pipe; 5. First flow path sealing bracket; 6. Liquid collection pipe; 7. Second flow path sealing bracket. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining this utility model and are not intended to limit this utility model.

[0033] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0034] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such terms can be used interchangeably where appropriate for the embodiments of the utility model described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0035] It should be noted that in the description of this utility model, the terms "upper," "lower," "left," "right," "inner," and "outer," which indicate directional or positional relationships, are based on the directional or positional relationships shown in the accompanying drawings. These are merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0036] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "setting," and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection, an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] Existing heat exchangers use straight heat exchange tubes welded together with bent sections to connect the two tubes. Specifically, the two ends of the straight heat exchange tubes are welded to two end plates, and then the bent section is welded to one of the end plates to connect the two tubes. Both the connection points between the straight and bent sections and the end plates require weld points for fixation. Due to the large number of pipes inside the heat exchanger, these weld points are very dense, and the heat exchange tubes have no deformation allowance. During operation, the heat exchange tubes are subjected to thermal stress and deformation of the pipes themselves, leading to weld cracks and liquid leaks, causing serious after-sales problems and significant economic losses.

[0038] Therefore, this application provides a method such as Figures 1 to 10 The heat exchanger shown includes: a fixed support 1; a heat exchange tube 2 having an inlet and an outlet, the portion of the heat exchange tube 2 located at the inlet and the portion of the heat exchange tube 2 located at the outlet being fixedly connected to the fixed support 1; and a support bracket 3 disposed in the middle of the heat exchange tube 2 and / or disposed in the portion of the heat exchange tube 2 away from the fixed support 1, the heat exchange tube 2 being supported on the support bracket 3, and the support bracket 3 and the heat exchange tube 2 being movable relative to each other. By welding the end of the heat exchange tube 2 to the fixed bracket 1, and setting the support bracket 3 to support the heat exchange tube 2 without welding and fixing it, the number of weld points of the heat exchanger can be reduced, thus reducing the production difficulty. At the same time, the relative movement between the support bracket 3 and the heat exchange tube 2 can be used to prevent the weld from cracking when the heat exchange tube 2 is deformed by thermal stress. This reduces the mutual influence between pipelines, greatly improves the stress distribution, ensures that the heat exchange tube 2 can adapt to deformation under complex thermal expansion and thermal stress conditions, improves leakage problems, and improves the stability of the structure and the reliability of the condensing device and air conditioning system.

[0039] The heat exchange tubes 2 are multiple in number, arranged in at least one column, and all heat exchange tubes 2 in the same column are fixedly connected to the same fixed support 1. Figure 3As shown in the figure, each column of heat exchange tubes 2 is distributed in 32 rows. The fixed brackets 1 are set vertically, and each fixed bracket 1 corresponds to all heat exchange tubes 2 in the same column. The fixed bracket 1 is provided with a fixing and mounting hole for the end of the heat exchange tube 2 to pass through. The end of the heat exchange tube 2 is inserted into the fixing and mounting hole, and then the end of the heat exchange tube 2 is welded to the fixed bracket 1. At this time, the fixed bracket 1 can not only fix all heat exchange tubes 2 in the same column, ensuring the relative position between the heat exchange tubes 2 in the same column is reliable, but also reduce the number of heat exchanger parts and improve the production efficiency of the heat exchanger.

[0040] Similarly, there are multiple heat exchange tubes 2, all arranged in at least one column, and all heat exchange tubes 2 in the same column are supported by the same support bracket 3. The support bracket 3 is vertically arranged, and each support bracket 3 corresponds to all heat exchange tubes 2 in the same column. Support mounting holes are formed on the support bracket 3, and the inner diameter of the support mounting holes is larger than the outer diameter of the heat exchange tubes 2. During installation, the heat exchange tubes 2 can directly pass through the support mounting holes and rest on the support bracket 3, thus achieving support for the heat exchange tubes 2 by the support bracket 3. At this time, the support bracket 3 can not only support and limit the position of all heat exchange tubes 2 in the same column, ensuring the reliability of the relative position between the heat exchange tubes 2 in the same column, but also reduce the number of heat exchanger components and improve the production efficiency of the heat exchanger.

[0041] The support mounting holes are flanged to ensure that they do not rub against the burrs of the support mounting holes when the heat exchange tube 2 deforms, thus avoiding damage to the heat exchange tube 2 and ensuring the structural reliability of the heat exchange tube 2 and the heat exchanger.

[0042] To further reduce the number of components in the heat exchanger and improve its structural strength, the heat exchange tube 2 includes two straight pipe sections 21 and a bent pipe section 22. The first ends of the two straight pipe sections 21 are respectively connected to the two ends of the bent pipe section 22, and the second ends of the two straight pipe sections 21 are fixedly connected to the fixed bracket 1. The support bracket 3 supports the heat exchange tube 2 between the first and second ends. Compared with the prior art, this is equivalent to forming two straight pipes and one bent pipe into a single structure, thereby effectively reducing the number of components in the heat exchange tube 2 and improving the overall structural strength of the heat exchange tube 2. At the same time, the heat exchange tube 2 can... The inlet and outlet are arranged at the same end, so the heat exchange tube 2 can be welded and fixed to the fixed support 1 at the same end (the second end of the straight pipe section 21). Other positions of the heat exchange tube 2 can be supported by the support bracket 3. When the heat exchange tube 2 is subjected to thermal stress, it will deform along its length, that is, the length of the straight pipe section 21 will change. Since the support bracket 3 and the straight pipe section 21 only play a supporting role, the straight pipe section 21 can move relative to the support bracket 3. This ensures that the deformation of the heat exchange tube 2 caused by thermal stress will not affect the weld at the inlet and outlet, thus ensuring the reliable fixation between the heat exchange tube 2 and the fixed support 1.

[0043] Furthermore, the support bracket 3 is located at the portion of the heat exchange tube 2 near the second end, that is, the support bracket 3 is used to support the second end of the heat exchange tube 2 to ensure that the heat exchange tube 2 can be set at a set angle and to ensure the reliability of the arrangement of the heat exchange tube 2.

[0044] Preferably, the support bracket 3 is located at the connection position between the second end and the bend section 22. This support bracket 3 can simultaneously support both the straight pipe section 21 and the bend section 22. Figure 1 As shown, the heat exchange tube 2 is arranged horizontally. Two middle support brackets located in the middle of the heat exchange tube 2 and a tail support bracket near the second end of the heat exchange tube 2 are set in the figure, which realizes multi-point support for the heat exchange tube 2. The tail support bracket can be set at the connection position between the second end and the bend section 22 to ensure the reliability of the arrangement of the heat exchange tube 2.

[0045] In one implementation, the heat exchange tube 2 formed by two straight pipe sections 21 and one bent pipe section 22 is U-shaped, with the bent pipe section 22 constituting the bend of the U-shape. The two straight pipe sections 21 are arranged parallel to each other to minimize the space occupied by the heat exchange tube 2, making the shape of the heat exchanger regular and improving the space utilization of the heat exchanger. Moreover, by replacing the straight pipes in the prior art with the U-shaped heat exchange tube 2 of this application, the structural strength of the heat exchange tube 2 is higher, which can reduce the use of the structure used to support the heat exchange tube 2, and thus further reduce the size of the heat exchanger, especially the width dimension. Compared with the structure in the prior art that requires the removal of the frame to remove the heat exchanger, the smaller width heat exchanger of this application can be directly pulled out from the frame, which facilitates the disassembly and maintenance of the heat exchanger and solves the problem of limited after-sales operation space.

[0046] The heat exchanger also includes an inlet pipe 4, which is mounted on the fixed bracket 1 and positioned above it. All inlets are connected to the inlet pipe 4. Refrigerant can enter the heat exchanger through the inlet pipe 4. By positioning the inlet pipe 4 above the fixed bracket 1, interference between the inlet pipe 4 and the heat exchanger components is avoided. The weld points of the inlet pipe 4 can also be concentrated on the outside of the heat exchanger, facilitating welding and installation without affecting the width of the heat exchanger. This further facilitates the overall removal of the heat exchanger from the frame, simplifying disassembly and maintenance and solving the problem of limited after-sales operating space. When disassembling the heat exchanger, the inlet pipe 4 can be removed from the outside (e.g., by cutting it off directly), and other structures connected to the heat exchanger can be removed (e.g., loosening the vibration damping hose and union). Then, the heat exchanger can be pulled out of the frame.

[0047] To facilitate the connection between the inlet pipe 4 and all heat exchange tubes 2, the heat exchanger also includes a first flow path sealing bracket 5. The first flow path sealing bracket 5 is disposed on the fixed bracket 1, and the first flow path sealing bracket 5 and the fixed bracket 1 together form a refrigerant inlet flow path. All inlets of all heat exchange tubes 2 fixedly connected to the same fixed bracket 1 are connected to the same refrigerant inlet flow path. The inlet pipe 4 is connected to the refrigerant inlet flow path, and the refrigerant in the inlet pipe 4 can flow into the refrigerant inlet flow path, and then enter the heat exchange tube 2 through the inlet of each heat exchange tube 2 for heat exchange. The first flow path sealing bracket 5 is fixedly disposed with the fixed bracket 1, and the first flow path sealing bracket 5 is located on the side of the fixed bracket 1 away from the heat exchange tubes 2, avoiding the influence of the first flow path sealing bracket 5 on the width dimension of the heat exchanger. This ensures that the refrigerant can smoothly enter all heat exchange tubes 2, and also facilitates the overall pulling of the heat exchanger from the frame, making it convenient for disassembly and maintenance of the heat exchanger and solving the problem of limited after-sales operating space.

[0048] Similarly, the heat exchanger also includes a liquid collecting pipe 6, which is located at the lower part of the fixed support 1 and on the side of the fixed support 1 away from the heat exchange tube 2. All outlets are connected to the liquid collecting pipe 6. The refrigerant can be collected in the liquid collecting pipe 6 through the heat exchanger. By placing the liquid collecting pipe 6 on the side of the fixed support 1, there is no interference between the liquid collecting pipe 6 and the components of the heat exchanger. The welding points of the liquid collecting pipe 6 can also be concentrated on the outside of the heat exchanger, facilitating welding and installation without affecting the width of the heat exchanger. This further facilitates the overall pulling of the heat exchanger from the frame, simplifying disassembly and maintenance and solving the problem of limited after-sales operating space. When disassembling the heat exchanger, since the liquid collecting pipe 6 does not affect the width of the heat exchanger, the heat exchanger can be pulled out without removing the liquid collecting pipe 6.

[0049] To facilitate the connection between the liquid collecting pipe 6 and all heat exchange tubes 2, the heat exchanger further includes a second flow path sealing bracket 7. The second flow path sealing bracket 7 is mounted on the fixed bracket 1, and together with the fixed bracket 1, forms a refrigerant outflow path. All outlets of all heat exchange tubes 2 fixedly connected to the same fixed bracket 1 are connected to the same refrigerant outflow path. The liquid collecting pipe 6 is also connected to the refrigerant outflow path. The refrigerant that has completed heat exchange in the heat exchange tubes 2 flows into the refrigerant outflow path and then into the liquid collecting pipe 6, completing the refrigerant circulation within the heat exchanger.

[0050] A condensation device, including the heat exchanger described above, such as... Figure 9 and Figure 10 As shown in the diagram, the width of the heat exchanger is smaller than the frame width of the condenser unit, with a spacing of b. This allows the heat exchanger to be directly pulled out of the frame during maintenance and other operations, solving the problem of limited after-sales operating space. In particular, the inlet pipe 4 and the liquid collecting pipe 6 do not interfere with the frame in terms of width; therefore, the heat exchanger can be pulled out without removing the inlet pipe 4 and the liquid collecting pipe 6 during disassembly.

[0051] An air conditioning system includes the heat exchanger or the condenser described above.

[0052] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A heat exchanger, characterized in that: include: Fixed bracket (1); The heat exchange tube (2) has an inlet and an outlet. The portion of the heat exchange tube (2) located at the inlet and the portion of the heat exchange tube (2) located at the outlet are both fixedly connected to the fixed bracket (1). A support bracket (3) is provided in the middle of the heat exchange tube (2) and / or in the part of the heat exchange tube (2) away from the fixed bracket (1). The heat exchange tube (2) is supported on the support bracket (3), and the support bracket (3) and the heat exchange tube (2) can move relative to each other.

2. The heat exchanger according to claim 1, characterized in that: The number of heat exchange tubes (2) is multiple, and all the heat exchange tubes (2) are distributed in at least one column, and all the heat exchange tubes (2) in the same column are fixedly connected to the same fixed bracket (1).

3. The heat exchanger according to claim 1, characterized in that: The number of heat exchange tubes (2) is multiple, and all the heat exchange tubes (2) are distributed in at least one column, and all the heat exchange tubes (2) in the same column are supported by the same support bracket (3).

4. The heat exchanger according to claim 1, characterized in that: The heat exchange tube (2) includes two straight pipe sections (21) and a bent pipe section (22). The first ends of the two straight pipe sections (21) are respectively connected to the two ends of the bent pipe section (22). The second ends of the two straight pipe sections (21) are fixedly connected to the fixed bracket (1). The support bracket (3) shown supports the heat exchange tube (2) between the first end and the second end; and / or, the support bracket (3) is located on the part of the heat exchange tube (2) near the second end.

5. The heat exchanger according to claim 4, characterized in that: The support bracket (3) is located at the connection point between the second end and the bent pipe section (22).

6. The heat exchanger according to claim 4, characterized in that: The heat exchange tube (2) is U-shaped, and the bent section (22) constitutes the bent part of the U-shape.

7. The heat exchanger according to claim 1, characterized in that: The heat exchanger also includes an air inlet pipe (4), which is disposed on the fixed support (1) and located above the fixed support (1). All the inlets are connected to the air inlet pipe (4).

8. The heat exchanger according to claim 7, characterized in that: The heat exchanger also includes a first flow path sealing bracket (5), which is disposed on the fixed bracket (1). The first flow path sealing bracket (5) and the fixed bracket (1) together form a refrigerant inlet flow path. All the inlets of all the heat exchange tubes (2) that are fixedly connected to the same fixed bracket (1) are connected to the same refrigerant inlet flow path. The air inlet pipe (4) is connected to the refrigerant inlet flow path.

9. The heat exchanger according to claim 1, characterized in that: The heat exchanger also includes a liquid collecting pipe (6), which is located at the lower part of the fixed support (1) and on the side of the fixed support (1) away from the heat exchange tube (2). All the outlets are connected to the liquid collecting pipe (6).

10. The heat exchanger according to claim 9, characterized in that: The heat exchanger also includes a second flow path sealing bracket (7), which is disposed on the fixed bracket (1). The second flow path sealing bracket (7) and the fixed bracket (1) together form a refrigerant outflow path. All outlets of all heat exchange tubes (2) fixedly connected to the same fixed bracket (1) are connected to the same refrigerant outflow path. The liquid collection pipe (6) is connected to the refrigerant outflow path.

11. A condensation device, characterized in that: The heat exchanger includes any one of claims 1 to 10.

12. An air conditioning system, characterized in that: It includes the heat exchanger according to any one of claims 1 to 10 or the condensing device according to claim 11.

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