A mounting structure of a connection pipe and a heat exchanger

Abstract

The utility model provides a kind of mounting structure and heat exchanger of connecting pipe, and mounting structure includes: three first connecting pieces, be located in the different position of the U-shaped copper pipe;Connecting pipe, including first connecting section, second connecting section and third connecting section, the first connecting section the second section and the third connecting section with three first connecting piece one-to-one corresponding connection, and the first connecting section and the second connecting section converge to the third connecting section by second connecting piece, the first connecting piece is equipped with first limit surface, the first connecting section the second connecting section and the third connecting section respectively butt in corresponding first limit surface, for limiting the connecting depth of corresponding connecting section and first connecting piece, and make corresponding connecting section and the U-shaped copper pipe be interval arrangement;The utility model solves the technical problem that connecting pipe mounting structure in the prior art affects the efficiency of heat exchanger, while reducing product material cost, and enables low-carbon environmental protection.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning accessories technology, and in particular to an installation structure for a connecting pipe and a heat exchanger. Background Technology

[0002] In air conditioning design, there are some minor technical details that are easily overlooked or neglected by technicians. In particular, the insertion depth of the connection between the connecting pipe of the indoor and outdoor heat exchangers and the U-shaped copper tube of the heat exchanger is important. Since the connection is welded inside the U-shaped copper tube and the design and manufacturing scheme is mature, the hidden technical details are easily overlooked or neglected, which may lead to a reduction in some quality indicators and a waste of costs.

[0003] The connecting pipes and assemblies on an air conditioner heat exchanger are crucial components. Their function is to connect and distribute the refrigerant between the U-shaped copper tubes, ensuring the refrigerant circulates and achieves uniform and efficient heat exchange. However, some subtle technical details are easily overlooked and difficult to detect. For example, if the connecting pipes and assemblies are inserted too deeply into the U-shaped copper tubes, exceeding the flared end of the tube, the inserted section will have double-walled thicknesses and a stepped shape. When the refrigerant flows, it will impact this stepped area, increasing flow resistance and potentially generating liquid flow noise, affecting noise quality. Furthermore, it may affect the uniformity of refrigerant distribution, resulting in uneven distribution across the top, bottom, and middle of the heat exchanger, thus impacting the overall refrigeration and heating efficiency and capacity. Utility Model Content

[0004] In view of the shortcomings of the existing technology, the present invention provides a connecting pipe installation structure and a heat exchanger, which solves the technical problem that the heat exchanger efficiency is affected by the connecting pipe installation structure in the prior art.

[0005] According to the embodiments of this utility model, the following technical solution is adopted:

[0006] An installation structure for a connecting pipe, applied to a heat exchanger, the heat exchanger including a U-shaped copper tube, the installation structure comprising:

[0007] Three first connectors are located at different positions on the U-shaped copper tube;

[0008] The connecting pipe includes a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment, the second connecting segment, and the third connecting segment are connected to three first connecting members in a one-to-one correspondence. The first connecting segment and the second connecting segment converge to the third connecting segment through the second connecting members to form a loop.

[0009] The first connector is provided with a first limiting surface, and the first connecting segment, the second connecting segment, and the third connecting segment respectively abut against the corresponding first limiting surface to limit the connection depth between the corresponding connecting segment and the first connector, and to ensure that the corresponding connecting segment and the U-shaped copper tube are spaced apart; and / or

[0010] The second connector is provided with a second limiting surface, and the first connecting segment, the second connecting segment and the third connecting segment abut against the second limiting surface to limit the connection depth between the corresponding connecting segment and the second connector.

[0011] Preferably, the first connector has a first flared portion, and the first limiting surface is disposed within the first flared portion.

[0012] Preferably, the diameter of the first flared portion is larger than the diameters of the first connecting segment, the second connecting segment, and the third connecting segment.

[0013] Preferably, the second connector has a second flared portion, and the second limiting surface is disposed within the second flared portion.

[0014] Preferably, the diameter of the second flared portion is larger than the diameters of the first connecting segment, the second connecting segment, and the third connecting segment.

[0015] Preferably, the cross-section of the second connector is Y-shaped, the first connecting segment and the second connecting segment are connected to the large end face of the second connector, and the third connecting segment is connected to the small end face of the second connector.

[0016] Preferably, the second connector is provided with a first diversion port and a second diversion port, the first diversion port and the second diversion port are connected to the second flared portion, and the first diversion port and the second diversion port are respectively connected to the first connecting segment and the second connecting segment.

[0017] Preferably, the first and second diversion ports gradually decrease in size towards the third connecting section.

[0018] This utility model also proposes a heat exchanger, including the above-described mounting structure for the connecting pipe.

[0019] Compared to existing technologies, this invention offers the following advantages: By optimizing the depth of the heat exchanger connecting pipe inserted into the U-shaped copper tube of the heat exchanger, the refrigerant flows more smoothly, reducing liquid flow noise, resulting in more uniform liquid distribution and improved heat exchange efficiency. The optimized connecting pipe size also reduces material usage and lowers costs. Attached Figure Description

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

[0021] Figure 2 This is a schematic diagram of the installation structure of the connecting pipe in an embodiment of this utility model;

[0022] Figure 3 This is a schematic diagram of the structure of the second connector in an embodiment of the present utility model;

[0023] Figure 4 for Figure 3 Top view;

[0024] Figure 5 A comparison of fluid flow noise before and after heat exchanger optimization.

[0025] In the above figures: 1. Heat exchanger body; 2. Heat exchanger fixing plate; 3. U-shaped copper tube; 4. First connector; 5. Connecting pipe; 51. First connecting section; 52. Second connecting section; 53. Third connecting section; 6. Second connector; 61. First branch port; 62. Second branch port. Detailed Implementation

[0026] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the technical solutions of this utility model are further described below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of this utility model and are not intended to limit it.

[0027] See Figures 1 to 5 This utility model provides an installation structure for a connecting pipe 5, applied to a heat exchanger, the heat exchanger including a U-shaped copper pipe 3, and the installation structure including:

[0028] Three first connectors 4 are located at different positions on the U-shaped copper tube 3;

[0029] The connecting pipe 5 includes a first connecting section 51, a second connecting section 52 and a third connecting section 53. The first connecting section 51, the second connecting section and the third connecting section 53 are connected to three first connecting pieces 4 in a one-to-one correspondence. The first connecting section 51 and the second connecting section 52 converge to the third connecting section 53 through the second connecting piece 6 to form a loop.

[0030] The first connector 4 is provided with a first limiting surface. The first connecting segment 51, the second connecting segment 52 and the third connecting segment 53 respectively abut against the corresponding first limiting surface to limit the connection depth between the corresponding connecting segment and the first connector 4, and to make the corresponding connecting segment and the U-shaped copper tube 3 spaced apart.

[0031] The second connector 6 is provided with a second limiting surface, and the first connecting segment 51, the second connecting segment 52 and the third connecting segment 53 abut against the second limiting surface to limit the connection depth between the corresponding connecting segment and the second connector 6.

[0032] In this embodiment, three first connectors 4 are provided at the U-shaped copper tube 3 for connecting to the connecting pipe 5. The connecting pipe 5 includes a first connecting section 51, a second connecting section 52, and a third connecting section 53. The first connecting section 51, the second connecting section 52, and the third connecting section 53 are connected at one end to the corresponding first connector 4. The other ends of the first connecting section 51 and the second connecting section 52 converge through the second connector 6 and connect to the other end of the third connecting section 53 to form a refrigerant circulation loop. Taking the refrigeration cycle as an example, the refrigerant flows out from the first connecting section 51 and the second connecting section 52 of the upper and lower branches respectively and collects at the second connector 6. After being collected, the water flows from the third connecting section 53 to the outlet of the outdoor heat exchanger. At the same time, the first connecting member 4 is provided with a first limiting surface, which is used to abut the connection ends of the first connecting section 51, the second connecting section 52 and the third connecting section 53 with the U-shaped copper tube 3 to limit the connection depth of each connecting section with the U-shaped copper tube 3, so that the corresponding connecting sections and the U-shaped copper tube 3 are spaced apart. Similarly, the second connecting member 6 is provided with a second limiting surface, which should be two second limiting surfaces provided on opposite sides of the second connecting member 6, used to limit the connection depth of the first connecting section 51, the second connecting section 52 and the third connecting section 53 with the second connecting member 6 respectively. In existing technology, the connecting pipe 5 of the heat exchanger is directly inserted into the U-shaped copper tube of the heat exchanger. The insertion depth is excessive, exceeding the flared portion of the U-shaped copper tube. This results in a double-walled structure between the connecting pipe 5 and the inserted portion of the U-shaped copper tube 3, creating a stepped appearance. When the refrigerant flows, it impacts this stepped area, increasing flow resistance and easily generating liquid flow noise. This embodiment, through the cooperation of the first connecting member 4 and the second connecting member 6, limits the connection depth between the first connecting section 51, the second connecting section 52, and the third connecting section 53 and the U-shaped copper tube 3, as well as between the first connecting section 51, the second connecting section 52, and the third connecting section 53. Figure 2 As shown, E represents the connection depth of the connecting pipe 5 before optimization (E is 18mm long), and F represents the connection depth of the connecting pipe 5 and the first connecting section 51 after optimization (F is 8mm long). Before optimization, the connecting pipe 5 was directly connected to the U-shaped copper pipe 3 with a connection depth of 18mm. After optimization, the connecting pipe 5 is connected to the U-shaped copper pipe 3 through the first connector 4 with a connection depth of 8mm. The connection depth has been significantly improved, avoiding excessively long connection depths in each connecting section and the formation of double-layer copper pipes. This allows for smoother refrigerant flow, reduces liquid flow noise, ensures more uniform liquid distribution, and improves heat exchange efficiency.

[0033] The first connector 4 has a first flared portion, and the first limiting surface is disposed within the first flared portion. Furthermore, the diameter of the first flared portion is larger than the diameters of the first connecting segment 51, the second connecting segment 52, and the third connecting segment 53.

[0034] In this embodiment, the first connector 4 is provided with a first flared portion, and a first limiting surface is located inside the first flared portion. The first connecting segment 51, the second connecting segment 52, and the third connecting segment 53 abut against the first limiting surface through the first flared portion. The first limiting surface restricts the first connecting segment 51, the second connecting segment 52, and the third connecting segment 53 from going deeper, so that each connecting segment is kept at a distance from the U-shaped copper tube 3 through the first connector 4, that is, connected but not in contact. Furthermore, the diameter of the first flared portion is larger than the diameter of the first connecting segment 51, the second connecting segment 52, and the third connecting segment 53. The inner diameter of the first connecting segment 51, the second connecting segment 52, and the third connecting segment 53 inserted into the first connector 4 is consistent with the inner diameter of the U-shaped copper tube. When the refrigerant flows, there is no step resistance, reducing flow noise.

[0035] The second connector 6 has a second flared portion, and the second limiting surface is disposed within the second flared portion. Furthermore, the diameter of the second flared portion is larger than the diameters of the first connecting segment 51, the second connecting segment 52, and the third connecting segment 53.

[0036] In this embodiment, the second connector 6 is provided with a second flared portion. There should be two second flared portions. The connection between the first connecting segment 51, the second connecting segment 52 and the second connector 6 has a second flared portion, and the connection between the third connecting segment 53 and the second connector 6 has another second flared portion. A second limiting surface is provided in the second flared portion (the number of second limiting surfaces is also two, and they are provided in the corresponding second flared portions). The diameter of the second flared portion is larger than the diameter of the first connecting segment 51, the second connecting segment 52 and the third connecting segment 53. The inner diameter of the first connecting segment 51, the second connecting segment 52 and the third connecting segment 53 inserted into the second connector 6 is consistent with that of the second connector 6, so that the refrigerant can flow directly and reduce operating noise.

[0037] The cross-section of the second connector 6 is Y-shaped. The first connecting segment 51 and the second connecting segment 52 are connected to the large end face of the second connector 6, and the third connecting segment 53 is connected to the small end face of the second connector 6.

[0038] In this embodiment, the second connector 6 has a Y-shaped structure. The first connecting segment 51 and the second connecting segment 52 are respectively connected to the large end face of the second connector 6, and the third connecting segment 53 is connected to the small end face of the second connector 6. The Y-shaped cross-section realizes the convergence and diversion of the three connecting segments, forming a complete fluid circulation path. The large end face connecting the two connecting segments provides a larger flow area, reduces fluid resistance, and is used for branch inflow. The small end face connecting the third connecting segment 53 converges and outputs uniformly, which is convenient for docking with external pipelines. In addition, the material of the second connector 6 is optimized to a Y-shaped connector with copper for liquid distribution. Brass material T2M has high density and weight, high processing difficulty and high cost, while the Y-shaped connector that can achieve the same effect is phosphorus deoxidized seamless copper pipe TP2M, which has low density and light weight, simpler processing difficulty and lower cost, thereby achieving further cost reduction.

[0039] The second connector 6 is provided with a first diversion port 61 and a second diversion port 62. The first diversion port 61 and the second diversion port 62 are connected to the second flared portion. The first diversion port 61 and the second diversion port 62 are respectively connected to the first connecting section 51 and the second connecting section 52.

[0040] In this embodiment, the first connecting section 51 and the second connecting section 52 enter from the first branch port 61 and the second branch port 62 respectively, and the fluid converges in the second flared section. The converged fluid is output through the third connecting section 53 to form a complete circulation loop. The independent setting of the first branch port 61 and the second branch port 62 avoids mutual interference between the fluids in the first connecting section 51 and the second connecting section 52. The second flared section is used to achieve a smooth transition and reduce flow resistance.

[0041] The diameters of the first diversion port 61 and the second diversion port 62 gradually decrease towards the direction of the third connecting section 53.

[0042] In this embodiment, the first diversion port 61 and the second diversion port 62 form a tapered channel to reduce the disturbance and backflow of fluid at the junction of the first diversion port 61, the second diversion port 62 and the second flared portion.

[0043] The following table compares the liquid separation data before and after heat exchanger optimization:

[0044]

[0045] The following table compares the performance data of the heat exchanger before and after optimization:

[0046]

[0047]

[0048] The following table shows the cost estimates before and after optimization:

[0049]

[0050] This embodiment also provides a heat exchanger, which includes the installation structure of the connecting pipe described above. The specific structure of the heat exchanger is as described in the above embodiment. Since this heat exchanger adopts all the technical solutions of the above embodiment, it has at least all the beneficial effects brought about by the technical solutions of the above embodiment, which will not be described in detail here.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An installation structure for a connecting pipe, applied to a heat exchanger, the heat exchanger comprising a U-shaped copper tube, characterized in that, The mounting structure includes: Three first connectors are located at different positions on the U-shaped copper tube; The connecting pipe includes a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment, the second connecting segment, and the third connecting segment are connected to three first connecting members in a one-to-one correspondence. The first connecting segment and the second connecting segment converge to the third connecting segment through the second connecting members to form a loop. The first connector is provided with a first limiting surface, and the first connecting segment, the second connecting segment, and the third connecting segment respectively abut against the corresponding first limiting surface to limit the connection depth between the corresponding connecting segment and the first connector, and to ensure that the corresponding connecting segment and the U-shaped copper tube are spaced apart; and / or The second connector is provided with a second limiting surface, and the first connecting segment, the second connecting segment and the third connecting segment abut against the second limiting surface to limit the connection depth between the corresponding connecting segment and the second connector.

2. The installation structure of the connecting pipe according to claim 1, characterized in that, The first connector has a first flared portion, and the first limiting surface is disposed within the first flared portion.

3. The installation structure of the connecting pipe according to claim 2, characterized in that, The diameter of the first flared portion is larger than the diameters of the first connecting segment, the second connecting segment, and the third connecting segment.

4. The installation structure of the connecting pipe according to claim 1, characterized in that, The second connector has a second flared portion, and the second limiting surface is disposed within the second flared portion.

5. The installation structure of the connecting pipe according to claim 4, characterized in that, The diameter of the second flared portion is larger than the diameters of the first connecting segment, the second connecting segment, and the third connecting segment.

6. The installation structure of the connecting pipe according to claim 1, characterized in that, The second connector has a Y-shaped cross-section. The first and second connecting segments are connected to the large end face of the second connector, and the third connecting segment is connected to the small end face of the second connector.

7. The installation structure of a connecting pipe according to claim 6, characterized in that, The second connector is provided with a first diversion port and a second diversion port. The first diversion port and the second diversion port are connected to the second flared portion. The first diversion port and the second diversion port are respectively connected to the first connecting segment and the second connecting segment.

8. The installation structure of a connecting pipe according to claim 7, characterized in that, The first and second diversion ports gradually decrease in size towards the third connecting section.

9. A heat exchanger, characterized in that, The mounting structure includes the connecting pipe according to any one of claims 1-8.

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