A pipe joint and pipe fitting connection structure for an air conditioning system

Abstract

The application discloses a pipe joint and a pipe fitting connecting structure for an air conditioning system. The pipe joint comprises a joint body and a first flange part. The first flange part comprises a first flange wall surface part facing the joint body and a second flange wall surface part facing away from the joint body. The first flange part comprises a plurality of groove parts. The groove parts are arranged in parallel with each other and extend from a flange outer peripheral wall part of the first flange part to a joint outer peripheral wall part of the joint body. The groove parts are recessed from the first flange wall surface part to the second flange wall surface part. The pipe joint is convenient to process.

Description

Technical Field

[0001] This application relates to the field of refrigeration system technology, and specifically to a pipe joint and fitting connection structure for an air conditioning system. Background Technology

[0002] In air conditioning systems, some refrigeration components, such as mufflers and liquid receivers, are connected to pipe fittings to connect to related pipelines. The pipe fittings are generally equipped with flanges to position the depth of the pipe fitting inserted into the cylinder. The side of the flange facing the cylinder has a groove. After the pipe fitting is pressed into the connection end of the refrigeration component by external force, it can avoid a tightly closed state. In related technologies, the groove of the flange extends radially along the pipe fitting, which is inconvenient to process. Utility Model Content

[0003] Therefore, it is necessary to provide a pipe connector for air conditioning systems to address the above problems. The specific technical solution is as follows:

[0004] A pipe connector for an air conditioning system includes a connector body and a first flange portion. The first flange portion includes a first flange wall portion facing the connector body and a second flange wall portion facing away from the connector body. The first flange portion includes a plurality of groove portions extending from the flange outer peripheral wall portion of the first flange portion toward the connector outer peripheral wall portion of the connector body, and the extending directions of each groove portion are parallel to each other. The groove portions are recessed from the first flange wall portion toward the second flange wall portion.

[0005] The pipe joint using the above scheme has multiple grooves on the first flange that are arranged in parallel to each other, which makes the mold processing design more convenient. Multiple punches used to form the grooves can be processed at one time. This design helps to simplify the mold processing or forming method.

[0006] This application also provides a pipe fitting connection structure for an air conditioning system, the pipe fitting connection structure including a cylindrical body and a pipe joint;

[0007] The cylindrical body includes a cylindrical interface section, and the cylindrical interface section includes a cylindrical interface end face;

[0008] The pipe fitting includes a fitting body and a first flange, at least a portion of the fitting body is inserted into the cylindrical interface section, and the fitting body is welded to the cylindrical interface section;

[0009] The first flange portion includes a first flanged wall portion facing the end face of the cylinder interface and a second flanged wall portion facing away from the end face of the cylinder interface. The first flange portion includes a plurality of groove portions, which extend from the outer peripheral wall portion of the flange of the first flange portion to the outer peripheral wall portion of the connector body. The extending directions of each groove portion are parallel to each other. The groove portion is recessed from the first flanged wall portion toward the direction where the second flanged wall portion is located.

[0010] The joint body and the sleeve interface section have capillary channels at their mating parts. The groove includes a groove that is connected to the capillary channel. At least a portion of the groove is filled with solder, and at least a portion of the capillary channel is filled with solder.

[0011] The pipe fitting connection structure using the above scheme is convenient for mold design and processing of pipe joints. After the pipe joint is pressed into the cylinder, the capillary channel between the joint body and the cylinder interface section can be connected to the outside through the groove of the groove, which is conducive to the penetration and flow of molten solder in the capillary channel between the joint body and the cylinder interface section. The groove is designed to facilitate the observation of the solder penetration and the weld quality. Attached Figure Description

[0012] Figure 1 This is a cross-sectional schematic diagram of the pipe fitting connection structure provided in one embodiment of this application;

[0013] Figure 2 for Figure 1 A magnified view of part A in the middle;

[0014] Figure 3 for Figure 1 A magnified view of a portion of the cylinder at the cylinder inlet section;

[0015] Figure 4 This is a schematic diagram of the pipe connector structure provided in one embodiment of this application;

[0016] Figure 5 for Figure 4 The front view of the pipe fitting shown;

[0017] Figure 6 for Figure 5 A bottom view;

[0018] Figure 7 for Figure 2 A magnified view of part B in the middle.

[0019] The annotations in the attached figures are explained as follows:

[0020] Pipe connection structure 100;

[0021] 110 cylinder body; 111 cylinder interface section; 112 cylinder interface end face; 1121 cylinder inner peripheral wall; 1122 conical wall; 11221 straight wall; 11222 stepped section; 1123 cylinder transition section;

[0022] Pipe fitting 120; fitting body 121; fitting outer peripheral wall portion 1211; fitting reducing section 1212; first flange portion 122; first flange wall portion 1221; second flange wall portion 1222; flange outer peripheral wall portion 1223; second flange portion 123; groove portion 124; groove 124a; first groove portion 1241; second groove portion 1242; recess 125;

[0023] Weld ring 200;

[0024] Chamber 1V; capillary channel 1M; first radial direction 1O; second radial direction 2O. Detailed Implementation

[0025] To enable those skilled in the art to better understand the technical solution of this application, the specific embodiments of this application will be further described below with reference to the accompanying drawings.

[0026] Please refer to Figures 4 to 6 , Figure 4 This is a schematic diagram of the pipe connector structure provided in one embodiment of this application; Figure 5 for Figure 4 The front view of the pipe fitting shown; Figure 6 for Figure 5 A bottom view.

[0027] This embodiment provides a pipe connector 120 for an air conditioning system. The pipe connector 120 includes a connector body 121 and a first flange portion 122. The first flange portion 122 includes a first flange wall portion 1221 facing the connector body 121 and a second flange wall portion 1222 facing away from the connector body 121. The first flange portion 122 includes a plurality of groove portions 124. The groove portions 124 extend from the flange outer peripheral wall portion 1223 of the first flange portion 122 to the connector outer peripheral wall portion 1211 of the connector body 121. The extending directions of each groove portion 124 are parallel to each other. The groove portions 124 are recessed from the first flange wall portion 1221 to the second flange wall portion 1222.

[0028] The pipe connector 120 using the above scheme has multiple grooves 124 of the first flange 122 arranged in parallel with each other, which makes the mold processing design more convenient and allows multiple punches used to form the grooves 124 to be processed at one time. This design helps to simplify the mold processing or forming method.

[0029] This embodiment also provides a pipe connection structure 100 for an air conditioning system, which includes a pipe connector 120. The pipe connection structure 100 and the pipe connector 120 will be described together below.

[0030] Please refer to this as well. Figure 1 and Figure 2 , Figure 1 This is a cross-sectional schematic diagram of the pipe fitting connection structure provided in one embodiment of this application; Figure 2 for Figure 1 A magnified view of part A in the middle.

[0031] The pipe connection structure 100 provided in this embodiment can be used in an air conditioning system. The pipe connection structure 100 includes a cylinder 110 and two pipe joints 120. The two pipe joints 120 are connected to the two ends of the cylinder 110. The two pipe joints 120 are respectively used to connect the inlet pipe and the outlet pipe in the refrigeration system so as to introduce and lead the refrigerant into and out of the cylinder 110.

[0032] The cylinder body 110 includes a cylinder body 111 and two cylinder interface sections 112, which are respectively connected to both ends of the cylinder body 111 and are respectively connected to two pipe fittings 120. The inner diameter of the cylinder body 111 can be larger than that of the cylinder interface sections 112, so that the refrigerant flowing into the cylinder body 111 can reduce the flow rate to achieve a noise reduction effect.

[0033] In other implementations, the cylinder 110 can also be a cylinder of equal diameter or a cylinder structure of other shapes. In other implementations, the cylinder 110 can also be connected to the pipe fitting 120 at only one end.

[0034] The cylinder body 110 may also include a cylinder transition section 113, which is connected between the cylinder body 111 and the cylinder interface section 112. The inner diameter of the cylinder transition section 113 decreases from the cylinder body 111 to the cylinder interface section 112 to facilitate the connection between the cylinder body 111 and the cylinder interface section 112, and also to facilitate the smooth flow of refrigerant.

[0035] In some implementation schemes, such as Figure 1 As shown, the cylinder 110 can be a one-piece molded part, that is, the cylinder body 111, the cylinder transition section 113, and the cylinder interface section 112 are a single structure. In other implementations, the cylinder 110 can also be a split structure. For example, the cylinder body 111 can be molded separately, while the cylinder transition section 113 and the cylinder interface section 112 can be a single structure, and the cylinder transition section 113 is then fixedly connected to the cylinder body 111 (e.g., by welding or other fixing methods).

[0036] Please refer to this as well. Figure 3 , Figure 3 for Figure 1The image shows a magnified view of the cylinder at the cylinder inlet section.

[0037] In this embodiment, the pipe connector 120 includes a connector body 121 and a first flange portion 122. The structure of the pipe connector 120 can be the same as described above. Figures 4 to 6 The pipe fitting 120 described in the illustrated embodiment is consistent with that described in the embodiment.

[0038] At least a portion of the connector body 121 is inserted into the cylindrical interface section 112, and the connector body 121 is welded to the cylindrical interface section 112. Specifically, solder can be filled between the outer peripheral wall 1211 of the connector body 121 and the inner peripheral wall 1122 of the cylindrical interface section 112. This connection ensures a sealing effect between the pipe connector 120 and the cylindrical interface section 112, reducing the risk of refrigerant leakage.

[0039] The first flange 122 extends radially outward from one end of the connector body 121 along the pipe connector 120. The axial direction of the pipe connector 120 is consistent with the axial direction of the cylinder 110, and the radial direction of the pipe connector 120 is perpendicular to its axial direction. The first flange 122 can have a circumferentially closed annular structure, such as... Figure 4 As shown. It can be understood that the first flange 122 is located at the end of the connector body 121 furthest from the cylinder body 111, as... Figure 2 As shown.

[0040] After the connector body 121 of the pipe connector 120 is inserted into the cylindrical interface section 112, the first flange 122 can contact the cylindrical interface end face 1121 of the cylindrical interface section 112, and there can be an axial gap between the first flange 122 and the cylindrical interface end face 1121 of the cylindrical interface section 112. Figure 2 In the illustrated scheme, there is an axial gap between the first flange portion 122 and the cylinder interface end face 1121 of the cylinder interface section 112. The first flange portion 122 includes a first flange wall portion 1221 and a second flange wall portion 1222 disposed opposite to each other, the first flange wall portion 1221 facing the cylinder interface end face 1121, and the second flange wall portion 1222 facing away from the cylinder interface end face 1121. The first flange portion 122 includes a plurality of groove portions 124, which are recessed from the first flange wall portion 1221 toward the second flange wall portion 1222, that is, the groove opening of the groove portion 124 faces the cylinder interface end face 1121. The groove portion 124 extends from the flange outer peripheral wall portion 1223 of the first flange portion 122 to the connector outer peripheral wall portion 1211 of the connector body 121.

[0041] like Figure 6 As shown, the extending directions of each groove portion 124 are arranged parallel to each other. Parallelism in this document includes the case where the extending directions are consistent.

[0042] The mating part of the connector body 121 and the cylindrical interface section 112 has a capillary channel 1M. The groove portion 124 includes a groove 124a, which is connected to the capillary channel 1M. At least a portion of the groove portion 124 is filled with solder, and at least a portion of the capillary channel 1M is filled with solder.

[0043] In the pipe connection structure 100 using the above scheme, after the pipe joint 120 and the cylinder 110 are press-fitted, if the first flange 122 fits against the cylinder interface end face 1121 of the cylinder 110, due to the groove 124 on the first flange 122, the capillary channel 1M between the joint body 121 and the cylinder interface section 112—that is, the fitting gap between the outer peripheral wall 1211 of the joint body 121 and the inner peripheral wall 1122 of the cylinder interface section 112—can be connected to the outside through the groove 124. This facilitates the flow of molten solder within the capillary channel 1M and through the capillary channel 1M to the groove 124, making it easy to observe the state of solder penetration and filling. Quality inspectors can infer the filling status of the solder within the capillary channel 1M by observing the solder filling status within the groove 124, thereby determining the solder penetration status and welding quality at the welding location, greatly improving the convenience and accuracy of detecting defective products.

[0044] In addition, if the product has poor welding or missing welding rings, when the product is tested for air tightness, the groove 124a of the groove portion 124 is connected to the capillary channel 1M between the connector body 121 and the cylindrical interface section 112 to form a venting channel. Gas can be discharged from the venting channel to form bubbles, and the air leakage can be observed. Defective products can be detected in a timely and accurate manner, reducing the probability of mistaking defective products for qualified products and improving the accuracy of air tightness testing.

[0045] In some embodiments, the outer peripheral wall 1211 of the connector body 121 of the pipe connector 120 is provided with a plurality of recesses 125, which extend axially along the connector body 121. At least one recess 124a of the groove portion 124 communicates with at least one recess 125. Thus, after the connector body 121 is press-fitted into the cylindrical interface section 112, the recesses 125 are located between the connector body 121 and the cylindrical interface section 112. The capillary channel 1M formed between the outer peripheral wall 1211 of the connector body 121 and the inner peripheral wall 1122 of the cylindrical interface section 112 is relatively large. After the weld ring 200 melts, it can flow into this capillary channel 1M and flow along the mating gap under capillary action. After cooling, it forms a weld to connect and fix the pipe connector 120 and the cylindrical interface section 112. The recesses 125 improve the weld strength and reliability between the pipe connector 120 and the cylindrical interface section 112.

[0046] In some products, the first flange 122 of the pipe fitting 120 is relatively thin, so multiple grooves 124 are provided. Since the grooves 124 are arranged in parallel, the circumferential dimension occupied by the grooves 124 in the fitting body 121 is large, which increases the probability of the grooves 124a and recesses 125 of the grooves 124, reducing the processing difficulty of the product. If the product has poor welding or missing welding rings 200, when the product is tested for air tightness, the grooves 124a and recesses 125 of the grooves 124 are likely to connect to form a leakage channel. Gas is more likely to be discharged from the recesses 125 and the grooves 124a of the grooves 124 and form bubbles in the test liquid (usually water). The leakage is easy to observe, and defective products can be detected in a timely and accurate manner, reducing the probability of mistaking defective products for qualified products and improving the accuracy of air tightness testing.

[0047] In practical applications, the pipe fitting 120 can be formed by punching. The multiple grooves 124 provided on the first flange 122 are arranged in parallel directions. The structure of the multiple grooves 124 on the mold used to process the pipe fitting 120 can be easily processed, which helps to simplify the processing or forming method of the mold.

[0048] In some implementations, the recess 125 can be formed by a wire drawing process.

[0049] In other implementations, the outer peripheral wall 1211 of the connector body 121 may be provided with multiple protrusions. The protrusions may extend approximately along the axial direction of the pipe connector 120. The multiple protrusions may be distributed along the circumference of the connector body 121, and a recess 125 may be formed between two adjacent protrusions.

[0050] In some embodiments, the cylinder interface section 112 of the cylinder 110 includes a cylinder interface end face 1121 and an inner peripheral wall portion 1122. The inner peripheral wall portion 1122 includes a conical wall portion 11221 and a straight wall portion 11222. The conical wall portion 11221 is disposed between the cylinder interface end face 1121 and the straight wall portion 11222, and the conical wall portion 11221 extends from the straight wall portion 11222 to the cylinder interface end face 1121. Along the axial direction of the cylinder 110, the inner radial direction of the conical wall portion 11221 gradually increases towards the cylinder interface end face 1121. Among them, the end face 1121 of the cylinder interface is the end face of the cylinder interface section 112 away from the cylinder body 111. The inner diameter of the conical wall 11221 gradually increases from the cylinder body 111 to the cylinder interface section 112. It can be understood that the inner peripheral wall 1122 of the cylinder interface section 112 is flared or trumpet-shaped at the end away from the cylinder body 111.

[0051] Figure 1 The diagram illustrates the central axis 1C of the cylinder 110, and the axial direction of the cylinder 110 refers to the direction parallel to the central axis 1C of the cylinder 110.

[0052] As configured above, after the cylinder 110 and the pipe connector 120 are assembled, since the cylinder interface section 112 is provided with a tapered wall portion 11221 extending to the cylinder interface end face 1121, a cavity 1V will be formed between the tapered wall portion 11221 and the outer peripheral wall portion 1211 of the connector body 121. The cavity 1V has an overall annular structure and the space of the cavity 1V is relatively large, which can communicate with the grooves 124a of each groove portion 124 of the first flange portion 122. When the cylinder 110 and pipe connector 120 are assembled and airtightness is tested, if there are poor welding or missing welds, the fitting gap between the cylinder 110 and pipe connector 120 (e.g., the area where the recess 125 is located), that is, the capillary channel 1M between the inner peripheral wall 1122 of the cylinder interface section 112 and the outer peripheral wall 1211 of the connector body 121, can communicate with the chamber 1V. The chamber 1V is in turn connected to the groove 124. In this way, the capillary channel 1M, the chamber 1V, and the groove 124 form a venting channel. The setting of the chamber 1V can amplify the air leakage phenomenon, and the setting of multiple grooves 124 can ensure the unobstructedness of the venting channel. Gas can be discharged through the venting channel and form relatively obvious bubbles in the test liquid (usually water). The bubbles are easier to observe, that is, the air leakage phenomenon is easier to observe, and defective products can be detected in a timely and accurate manner, reducing the probability of mistaking defective products for qualified products and improving the accuracy of airtightness testing.

[0053] During the fabrication of the pipe fitting connection structure 100, the fitting body 121 of the pipe fitting 120 and the cylindrical interface section 112 of the cylindrical body 110 can be assembled by interference fit, which allows for better positioning of the relative positions of the fitting body 121 and the cylindrical interface section 112. To ensure a firm connection and a tight seal, the fitting body 121 and the cylindrical interface section 112 are further fixed by welding. The welding method can be brazing or similar.

[0054] In some embodiments, before the connector body 121 is pressed into the cylindrical interface section 112, the welding ring 200 can be placed inside the cylindrical interface section 112. To restrict the position of the welding ring 200, the inner peripheral wall portion 1122 of the cylindrical interface section 112 can be provided with a stepped portion 1123 facing the pipe connector 120. The outer peripheral wall surface of the welding ring 200 can contact the inner peripheral wall portion 1122 of the cylindrical interface section 112. After the welding ring 200 is placed inside the cylindrical interface section 112, the connector body 121 is then pressed into the cylindrical interface section 112. The welding ring 200 can limit the pressing depth of the connector body 121, thus providing axial restraint for the connector body 121. Welding operations are then performed on the connector body 121 and the cylindrical interface section 112.

[0055] In specific implementation, after the connector body 121 is press-fitted into the cylinder interface section 112, the first flange wall surface 1221 of the first flange portion 122 can have an axial gap with the cylinder interface end face 1121 of the cylinder interface section 112, such as... Figure 2 As shown. During the welding process, the molten weld ring 200 can flow axially along the capillary channel 1M between the joint body 121 and the cylindrical interface section 112 under capillary action. The axial gap between the first flange wall surface 1221 and the cylindrical interface end face 1121, as well as the aforementioned chamber 1V, allows operators to easily observe the state of solder penetration and filling. Generally, if the molten solder can flow to the location of the chamber 1V or the groove 124, it indicates that the solder filling between the joint body 121 and the cylindrical interface section 112 is relatively good, which is beneficial for operators to evaluate the welding quality. In addition, in the airtightness test, the axial gap is connected to the chamber 1V, and the axial gap also serves as part of the venting channel, making it easier for gas to be discharged and easier to form obvious bubbles in the test liquid. The leakage phenomenon is easier to observe, which helps to improve the accuracy of the airtightness test.

[0056] In other specific implementations, after the connector body 121 is pressed into the cylinder interface section 112, the first flange wall surface 1221 of the first flange portion 122 can also contact the cylinder interface end face 1121 of the cylinder interface section 112. The contact between the first flange wall surface 1221 and the cylinder interface end face 1121 can limit the pressing depth of the connector body 121.

[0057] In other embodiments, the welding ring 200 can be placed between the cylinder interface end face 1121 and the first flange portion 122 of the cylinder interface section 112. Specifically, the welding ring 200 can be fitted onto the outer circumference of the connector body 121, and then the connector body 121 with the welding ring 200 fitted can be press-fitted into the cylinder interface section 112. After press-fitting, welding is performed, and an airtightness test is conducted after welding. If the product has welding defects, the gas inside the product can be discharged through the leakage channel formed by the fitting gap between the connector body 121 and the cylinder interface section 112, the chamber 1V, and the groove portion 124. The leakage is easily observed, allowing for convenient and timely detection of defective products.

[0058] The cylinder 110 can be made of copper, steel, or aluminum. To reduce costs, the cylinder 110 can be made of steel, such as stainless steel, and can be formed by spinning steel pipes.

[0059] The wall thickness of the cylinder 110 is usually set to be relatively thin to save material costs. The wall thickness of the cylinder 110 also needs to take into account the processing technology and the structural performance of the cylinder 110. Generally, the wall thickness of the cylinder 110 can be less than 0.6mm, for example, it can be 0.59mm, 0.5mm, etc.

[0060] Some implementation schemes, such as Figure 3 As shown, along the axial direction of the cylinder 110, the axial dimension z of the conical wall portion 11221 of the cylinder interface section 112 satisfies: z ≤ 2mm; the included angle β between the conical wall portion 11221 and the axial direction of the cylinder 110 satisfies: 10° < β < 45°. This structural parameter setting for the conical wall portion 11221 facilitates its machining, especially when the cylinder 110 wall thickness is relatively thin. It reduces the probability of defects such as cracking of the cylinder interface section 112 due to an excessively large included angle with the axial direction of the cylinder 110 during machining.

[0061] For example, when the wall thickness of the cylinder 110 is less than 0.6 mm, the axial dimension z of the conical wall portion 11221 can be 0.8 mm to 1.2 mm, and the included angle β between the conical wall portion 11221 and the axial direction of the cylinder 110 can be 13° to 16°.

[0062] In addition, the conical wall portion 11221 can guide the press-fitting of the pipe fitting 120. The axial angle β between the conical wall portion 11221 and the cylinder 110 is relatively small, for example, 14°, which can make the axial dimension z of the conical wall portion 11221 relatively large, such as the aforementioned 0.8mm~1.2mm. In this way, it can play a better guiding role in the press-fitting of the pipe fitting 120 and reduce the probability of deformation of the cylinder interface section 112 due to the thin wall thickness of the cylinder 110 during the press-fitting process of the pipe fitting 120.

[0063] The pipe fitting 120 can be made of steel, aluminum, or copper. Connecting pipes in refrigeration systems are mostly made of copper due to its good corrosion resistance and high thermal conductivity. For ease of connection to the connecting pipes in the refrigeration system, the pipe fitting 120 can be made of copper, such as pure copper.

[0064] The pipe fitting 120 may further include a second flange 123, which extends radially inward from the other end of the fitting body 121 along the pipe fitting 120. The second flange 123 and the first flange 122 are disposed opposite to each other. When the pipe fitting 120 is subsequently connected to a connecting pipe in the refrigeration system, the second flange 123 can facilitate the limiting of the connecting pipe, and the end face of the connecting pipe extending into the pipe fitting 120 can abut against and limit the connection with the second flange 123.

[0065] The connector body 121, the first flange 122, and the second flange 123 can be an integral structure. The pipe connector 120 can adopt a cylindrical pipe structure. One end of the pipe connector 120 can be bent outward to form the first flange 122, and the other end of the pipe connector 120 can be bent inward to form the second flange 123. The portion of the pipe connector 120 between the first flange 122 and the second flange 123 forms the connector body 121.

[0066] The wall thickness of the pipe fitting 120 can be relatively thin to save material costs. In a design where the pipe fitting 120 is an integral structure, the thickness of the first flange 122 is the same as the wall thickness of the fitting body 121 and the thickness of the second flange 123. Figure 4 and Figure 5 The thickness of the first flange 122 is defined as h, which is the axial dimension of the first flange 122 in the pipe connector 120. The groove depth of the groove 124 is defined as h1, which refers to the depth to which the groove 124 is recessed from the first flange wall surface 1221 to the second flange wall surface 1222. The groove depth h1 is also the axial dimension of the groove 124 in the pipe connector 120. The groove width of the groove 124 is defined as w1. Specifically, h ≤ 0.6 mm, h1 = (0.25~0.3) h, and w1 ≤ h. This design reduces the material cost of the pipe fitting 120. The relatively small groove depth h of the groove portion 124 ensures that after machining the groove portion 124, the first flange portion 122 still has a considerable thickness at the location of the groove portion 124. During the welding process between the pipe fitting 120 and the cylinder 110, the molten solder flowing to the location of the groove portion 124 reduces the probability of the molten solder melting through the first flange portion 122. Setting the groove width w1 of the groove portion 124 to be no greater than the thickness of the first flange portion 122 avoids excessive accumulation of molten solder in the area of ​​the groove portion 124, further reducing the probability of accumulated solder melting through the first flange portion 122. In short, the aforementioned dimensional settings of the first flange portion 122 and the related dimensional settings of the groove portion 124 reduce material costs, ensure smooth venting channels, and also help ensure the processing quality of the pipe fitting connection structure 100.

[0067] It should be noted that, based on the relatively small groove depth h and groove width w1 of the groove portion 124, the first flange portion 122 can be provided with multiple groove portions 124, which facilitates the formation of multiple venting channels communicating with the groove portions 124, so that the air leakage can be more easily observed during air tightness testing, thereby facilitating the accurate detection of defective products.

[0068] In practice, the thickness h of the first flange 122 can be 0.5mm, which reduces material costs while ensuring the structural reliability of the pipe fitting 120. The groove depth h1 of the groove 124 can be 0.15mm, and the groove width w1 of the groove 124 can be 0.5mm, which balances ease of processing and accuracy of airtightness testing.

[0069] In a specific implementation, the distance between two adjacent grooves 124 is d, where d > 2h, in the direction perpendicular to the extension direction of the groove 124. This large distance between adjacent grooves 124 allows the molten solder to disperse and accumulate when it flows to the location of the groove 124 during the welding process of the pipe joint 120 and the cylinder 110. This prevents the accumulated solder from being too close together and negatively impacting the first flange 122, thus improving processing quality.

[0070] In specific implementation, such as Figure 6 As shown, the first flange portion 122 has a first radial direction 1O, and the extending direction of the groove portion 124 is parallel to the first radial direction 1O. This facilitates the processing of the groove portion 124.

[0071] In specific implementation, the first flange portion 122 has a second radial direction 2O, the first radial direction 1O is perpendicular to the second radial direction 2O, and both the first radial direction 1O and the second radial direction 2O pass through the axis of the first flange portion 122. Multiple groove portions 124 are symmetrically arranged relative to the second radial direction 2O. This symmetrical arrangement makes mold design and processing more convenient, allowing multiple symmetrical groove-forming structures to be processed at once, improving the processing efficiency of the mold. Furthermore, the symmetrical arrangement also ensures a relatively uniform distribution of the multiple groove portions 124, which is beneficial to the stability of the pipe joint 120 structure and makes it easier to observe the solder flow during manufacturing.

[0072] In some examples, the groove portion 124 includes a first groove portion 1241, the central axis of which coincides with the first radial direction 1O of the first flange portion 122. It is understood that the first radial direction 1O passes through the center of the first flange portion 122. In some examples, multiple groove portions 124 include multiple second groove portions 1242, which are symmetrically arranged on both sides of the first groove portion 1241. This arrangement results in a longer extension length for some groove portions 124, a relatively larger groove space for the groove portions 124, and a more uniform distribution of the groove portions 124, which facilitates gas discharge during airtightness testing and makes it easier to observe leaks.

[0073] Figure 6 In the example shown, there are two first groove portions 1241, and two second groove portions 1242 are symmetrically arranged on both sides of each first groove portion 1241. In a specific implementation, the projection of the groove portion 124 in a projection plane perpendicular to the extending direction of the groove portion 124 can be rectangular, semi-circular, semi-elliptical, or triangular, etc., meaning the cross-sectional shape of the groove portion 124 can be rectangular, semi-circular, semi-elliptical, or triangular, etc. This regular shape of the groove portion 124 facilitates the fabrication of molds for processing the pipe fitting 120. In practical applications, the cross-sectional shape of the groove portion 124 can also be set as needed.

[0074] Please refer to this as well. Figure 7 , Figure 7 for Figure 2 A magnified view of part B in the middle.

[0075] In some embodiments, the connector body 121 includes a connector reducing section 1212, which is located at the end away from the first flange 122. The outer diameter of the connector reducing section 1212 on the side closer to the first flange 122 is larger than the outer diameter of the connector reducing section 1212 on the side away from the first flange 122. Thus, when the connector body 121 is assembled with the cylindrical interface section 112, the connector reducing section 1212 of the connector body 121 is inserted into the cylindrical interface section 112 first. Under the guiding action of the tapered wall portion 11221 of the connector reducing section 1212 and the cylindrical interface section 112, the connector body 121 is easily inserted into the cylindrical interface section 112, reducing the probability of deformation of the connector body 121 or the cylindrical interface section 112.

[0076] Furthermore, after the joint body 121 and the cylindrical interface section 112 are assembled, a relatively large fitting gap exists between the joint reducing section 1212 and the cylindrical interface section 112 due to the setting of the joint reducing section 1212. In the welding method where the welding ring 200 is set inside the cylindrical interface section 112, the molten solder can more easily flow through the fitting gap between the joint reducing section 1212 and the cylindrical interface section 112 towards the direction of the first flange 122, which makes it easier to ensure the solder filling effect between the joint body 121 and the cylindrical interface section 112, and helps to improve the welding reliability of both.

[0077] In practice, the reducing section 1212 of the connector can be roughly tapered. The axial dimension and the tapered angle of the reducing section 1212 can be determined as needed, and no specific numerical range is limited here.

[0078] The aforementioned pipe connection structure 100 can be applied to refrigeration devices such as silencers, liquid receivers, and four-way valves, and is especially applicable to products that require conversion via pipe fittings 120.

[0079] The ordinal numbers used in the embodiments of this application are for distinguishing different components with the same name and do not indicate a specific order, primary or secondary relationship, or quantity. The term "multiple" in this application refers to two or more.

[0080] The above examples illustrate the principles and implementation methods of this application. The descriptions of the embodiments are merely for the purpose of helping to understand the methods and core ideas of this application. It should be noted that those skilled in the art can make various improvements and modifications to this application without departing from its principles, and these improvements and modifications also fall within the protection scope of this application.

Claims

1. A pipe joint for an air conditioning system, characterized by: The pipe fitting (120) includes a fitting body (121) and a first flange portion (122). The first flange portion (122) includes a first flange wall portion (1221) facing the fitting body (121) and a second flange wall portion (1222) facing away from the fitting body (121). The first flange portion (122) includes a plurality of groove portions (124). The groove portions (124) extend from the flange outer peripheral wall portion (1223) of the first flange portion (122) to the fitting outer peripheral wall portion (1211) of the fitting body (121). The extension directions of each groove portion (124) are parallel to each other. The groove portions (124) are recessed from the first flange wall portion (1221) to the second flange wall portion (1222).

2. The pipe fitting according to claim 1, characterized in that: The outer peripheral wall (1211) of the connector body (121) is provided with a plurality of recesses (125), the recesses (125) extending along the axial direction of the pipe connector (120), the groove portion (124) includes a groove (124a), and at least one of the grooves (124a) communicates with at least one of the recesses (125).

3. The pipe fitting according to claim 1 or 2, characterized in that: The first flange (122) has a first radial direction (1O), and the extension direction of the groove (124) is parallel to the first radial direction (1O).

4. The pipe fitting according to claim 3, characterized in that: The first flange (122) has a second radial direction (2O), the first radial direction (1O) is perpendicular to the second radial direction (2O), both the first radial direction (1O) and the second radial direction (2O) pass through the axis of the first flange (122), and the plurality of grooves (124) are arranged symmetrically relative to the second radial direction (2O).

5. The pipe fitting according to any one of claims 1-4, characterized in that: The thickness of the first flange (122) is defined as h, the groove depth of the groove (124) is h1, and the groove width of the groove (124) is w1, wherein h≤0.6mm, h1=(0.25~0.3)h, and w1≤h.

6. The pipe fitting according to claim 5, characterized in that, In a direction perpendicular to the extending direction of the groove (124), the distance between two adjacent grooves (124) is d, where d > 2h.

7. The pipe fitting according to claim 5 or 6, characterized in that, The thickness of the first flange (122) is 0.5 mm, the groove depth of the groove (124) is 0.15 mm, and the groove width of the groove (124) is 0.5 mm.

8. A pipe connection structure for an air conditioning system, characterized in that, The pipe fitting connection structure (100) includes a cylinder (110) and a pipe joint (120); The cylinder (110) includes a cylinder interface section (112), and the cylinder interface section (112) includes a cylinder interface end face (1121); The pipe fitting (120) includes a fitting body (121) and a first flange (122). At least a portion of the fitting body (121) is inserted into the cylindrical interface section (112), and the fitting body (121) is welded to the cylindrical interface section (112). The first flange portion (122) includes a first flange wall portion (1221) facing the end face (1121) of the cylinder interface and a second flange wall portion (1222) facing away from the end face (1121) of the cylinder interface. The first flange portion (122) includes a plurality of groove portions (124). The groove portions (124) extend from the flange outer peripheral wall portion (1223) of the first flange portion (122) to the connector outer peripheral wall portion (1211) of the connector body (121). The extending directions of each groove portion (124) are parallel to each other. The groove portion (124) is recessed from the first flange wall portion (1221) toward the direction where the second flange wall portion (1222) is located. The mating portion of the connector body (121) and the cylindrical interface section (112) has a capillary channel (1M), the groove portion (124) includes a groove (124a), the groove (124a) is connected to the capillary channel (1M), at least a portion of the groove portion (124) is filled with solder, and at least a portion of the capillary channel (1M) is filled with solder.

9. The pipe fitting connection structure according to claim 8, characterized in that, The cylindrical interface section (112) includes a cylindrical interface end face (1121) and a cylindrical inner peripheral wall portion (1122). The cylindrical inner peripheral wall portion (1122) includes a conical wall portion (11221) and a straight wall portion (11222). The conical wall portion (11221) is disposed between the cylindrical interface end face (1121) and the straight wall portion (11222). The conical wall portion (11221) extends from the straight wall portion (11222) to the cylindrical interface end face (1121). Along the axial direction of the cylindrical body (110), the inner radial direction of the conical wall portion (11221) gradually increases towards the cylindrical interface end face (1121).

10. The pipe fitting connection structure according to claim 9, characterized in that, Along the axial direction of the cylinder (110), the axial dimension z of the conical wall portion (11221) satisfies: z≤2mm; the included angle β between the conical wall portion (11221) and the axial direction of the cylinder (110) satisfies: 10°<β<45°.

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