Flow-splitting unit and refrigeration system comprising same

Abstract

A flow-splitting unit (100) and a refrigeration system comprising same. The flow-splitting unit (100) for use in a refrigeration system comprises a base (10), wherein the base (10) is provided with at least two communication ports (17) in communication with external connecting pipes; a chamber (11) is configured in the base; and the communication ports (17) are in communication with the chamber (11).

Description

shunt unit and its refrigeration system

[0001] Related applications

[0002] This application claims priority to Chinese Patent Application No. 202520305932.0, filed on February 24, 2025, entitled "Shunting Unit and Refrigeration System Thereof", and Chinese Patent Application No. 202510208959.2, filed on February 24, 2025, entitled "Shunting Unit and Refrigeration Piping System Thereof", the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of refrigeration system technology, and in particular to a flow divider unit and its refrigeration system. Background Technology

[0004] In the circulation piping of a refrigeration system, multiple pipes used for refrigerant flow need to be connected to a distribution unit. The distribution unit is used to distribute the fluid in the main flow path of the refrigeration system to various branches, or to gather the fluid in the branches to the main flow path, thereby completing the connection of each pipe and realizing the miniaturization of the circulation piping.

[0005] Existing shunt units are typically formed by overlapping and joining multiple plates, which is a complex process with high manufacturing costs and a risk of leakage. Summary of the Invention

[0006] To address the aforementioned technical problems, this application provides a shunt unit.

[0007] A flow distribution unit for use in a refrigeration system includes: a base, wherein the base has at least two communication ports that communicate with external pipes, and a chamber is constructed in the base, wherein the communication ports communicate with the chamber.

[0008] In one embodiment, the seat includes a base and a cover plate. The base is integrally formed, and the cover plate covers the base and cooperates with the base to form the cavity. Both the base and the cover plate have the communication openings. The number of communication openings on the base is at least two, and / or the number of communication openings on the cover plate is at least two.

[0009] With this design, the base is integrally molded, making the overall processing simple and the structure stable. It also reduces welding points, thereby preventing media leakage. The connection ports on the base and cover are used to connect with external pipes, allowing the media to enter the chamber for redistribution.

[0010] In one embodiment, the base has a plurality of protrusions on the side away from the cover plate, the protrusions extending away from the cover plate, and the protrusions are hollow and form the communication opening.

[0011] In one embodiment, the boss forms a step on the inner wall of the communication port, the step protruding in a radially inward direction and used to abut against an external pipeline.

[0012] In one embodiment, the step is located at one end of the communication opening near the chamber, and the side of the step near the chamber is flush with the inner wall of the chamber away from the cover plate.

[0013] In one embodiment, the chamber has a cross-shaped cross section, and the base has four communication ports on the side away from the cover plate, with the four communication ports located at the four ends of the chamber; the cover plate has one communication port, and the projection of the communication port on the cover plate onto the base is located in the middle of the four communication ports on the base.

[0014] In one embodiment, the base has a first connecting hole and the cover plate has a second connecting hole. The positions of the first connecting hole and the second connecting hole are correspondingly arranged. The diversion unit also includes a connector, which passes through and connects to the two first connecting holes and the two second connecting holes.

[0015] In one embodiment, there are two first connecting holes, which are opened at both ends of the diagonal of the base, and two second connecting holes, which are opened at both ends of the diagonal of the cover plate, with the first connecting holes and the second connecting holes corresponding one-to-one.

[0016] In one embodiment, the base has a receiving groove, the cover plate is a flat plate structure, the cover plate covers the opening of the receiving groove to form the chamber, and the base and the cover plate are welded together.

[0017] In one embodiment, the slot of the base is bent toward the direction away from the receiving slot to form a flange, and a protrusion is provided on the side of the flange facing away from the cover plate. The first connecting hole is opened on the flange and extends to the end of the protrusion away from the cover plate.

[0018] In one embodiment, the base is integrally formed.

[0019] With this configuration, the external pipes supply refrigerant flow. The refrigerant enters the chamber through the external pipes and connecting ports, and can then flow through the chamber into other external pipes. The one-piece molding of the base reduces manufacturing costs while also lowering the risk of leakage, ensuring the stability of the distribution unit's operation.

[0020] In one embodiment, at least one of the communication openings is provided on each of the two sides of the base in the thickness direction.

[0021] In one embodiment, one side of the seat body is provided with a first communication port, a second communication port, a third communication port and a fourth communication port communicating with the chamber. The first communication port and the second communication port are respectively opened at both ends of the length direction of the seat body, and the third communication port and the fourth communication port are respectively opened at both ends of the width direction of the seat body.

[0022] In one embodiment, the flow area of ​​the first connection port is greater than the flow areas of the second connection port, the third connection port, and the fourth connection port.

[0023] In one embodiment, the seat includes a first connecting segment, a second connecting segment, a third connecting segment, and a fourth connecting segment. The first connecting port is opened in the first connecting segment, the second connecting port is opened in the second connecting segment, the third connecting port is opened in the third connecting segment, and the fourth connecting port is opened in the fourth connecting segment. The inner walls of the first connecting segment, the second connecting segment, the third connecting segment, and the fourth connecting segment are at least partially configured as arc-shaped structures.

[0024] In one embodiment, along the axial direction of the communication port, the thickness of the seat is defined as H, and the diameter of the inner wall of the first connecting segment is defined as D. The thickness H of the seat and the diameter D of the inner wall of the first connecting segment satisfy: H < D.

[0025] In one embodiment, the flow area of ​​the first connection port is defined as S1, and the thickness H of the seat, the diameter D of the inner wall of the first connecting section, and the flow area S1 of the first connection port satisfy: H×D≥S1.

[0026] In one embodiment, along the axial direction of the connection port, the thickness of the seat is defined as H, the diameter of the inner wall of the second connecting segment is defined as d, and the flow area of ​​the second connection port is defined as S2. The thickness H of the seat, the diameter d of the inner wall of the second connecting segment, and the flow area S2 of the second connection port satisfy: H×d≥S2.

[0027] In one embodiment, the seat body is further provided with a fifth communication port communicating with the chamber. The fifth communication port is located at the intersection of the first connecting segment, the second connecting segment, the third connecting segment and the fourth connecting segment. The diameter of the inner wall of the first connecting segment is larger than the diameter of the inner walls of the second connecting segment, the third connecting segment and the fourth connecting segment.

[0028] In one embodiment, the thickness of the seat is defined as H along the axial direction of the communication port, and the thickness H of the seat is less than or equal to 15 mm.

[0029] This application also provides a refrigeration system, including the diversion unit as described above and an external pipe, the external pipe being fixedly connected to the communication port.

[0030] Details of one or more embodiments of this application are set forth in the following drawings and description. Other features, objects, and advantages of this application will become apparent from the specification, drawings, and claims. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the disclosed drawings without creative effort.

[0032] Figure 1 is a schematic diagram of the structure of one embodiment of the shunt unit provided in this application.

[0033] Figure 2 is a structural cross-sectional view of one embodiment of the shunt unit provided in this application.

[0034] Figure 3 is a structural cross-sectional view of the base of one embodiment of the diversion unit provided in this application.

[0035] Figure 4 is a structural cross-sectional view of the base of one embodiment of the diversion unit provided in this application.

[0036] Figure 5 is a structural cross-sectional view of the cover plate of one embodiment of the diversion unit provided in this application.

[0037] Figure 6 is a top view of the base of one embodiment of the diversion unit provided in this application.

[0038] Figure 7 is a schematic diagram of the structure of one embodiment of the shunt unit provided in this application.

[0039] Figure 8 is a cross-sectional view of one embodiment of the shunt unit provided in this application.

[0040] Figure 9 is a cross-sectional view from another angle of one embodiment of the diversion unit provided in this application.

[0041] Figure 10 is a front-view sectional view of the seat of one embodiment of the diversion unit provided in this application.

[0042] Figure 11 is a schematic diagram of the structure of the seat of one embodiment of the diversion unit provided in this application.

[0043] Figure 12 is a top-view cross-sectional view of the seat of one embodiment of the diversion unit provided in this application.

[0044] The symbols in the diagram represent the following meanings: 100, Diversion unit; 10, Base; 101, Base plate; 102, Cover plate; 11, Chamber; 12, First connecting hole; 14, Receiving groove; 15, Flanged edge; 16, Boss; 17, Connecting port; 171, Sixth connecting port; 172, Seventh connecting port; 173, Eighth connecting port; 174, Ninth connecting port; 175, Tenth connecting port; 18, Step; 19, Protrusion; 21, Second connecting hole; 30, Connector; 40, Flower arrangement structure; 50, External connecting pipe; 111, First connecting port; 112, Second connecting port; 113, Third connecting port; 114, Fourth connecting port; 103, First connecting section; 104, Second connecting section; 105, Third connecting section; 106, Fourth connecting section; 161, Fifth connecting port. Detailed Implementation

[0045] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0046] It should be noted that when a mechanism is referred to as being "fixed to" or "set on" another mechanism, it can be directly on the other mechanism or there may be an intervening mechanism. When a mechanism is considered to be "connected to" another mechanism, it can be directly connected to the other mechanism or there may be an intervening mechanism. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0047] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0048] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0049] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0050] In this application, the X direction in Figure 1 is defined as the length direction, and the Y direction in Figure 1 is defined as the width direction.

[0051] The diversion unit 100 provided in this application is formed by assembling a base 101 and a cover plate 102. The positioning of the base 101 and cover plate 102 is ensured by the positioning cooperation of the connector 30 with the first connecting hole 12 and the second connecting hole 21, preventing misalignment. The connector 30 can also pre-tighten the base 101 and cover plate 102, facilitating welding between them. The diversion unit 100 is used in the circulation pipe of a refrigeration system, and can collect multiple pipes used for refrigerant flow. Refrigeration systems include various implementations, such as the outdoor unit of an air conditioning system. The diversion unit 100 is installed inside the outdoor unit. The outdoor unit typically houses components forming the refrigerant circuit, such as a compressor, storage tank, outdoor heat exchanger, oil separator, various valves, and electrical installation units. The diversion unit 100 of this application connects to multiple external pipes 50, which are used to connect to various components in the compressor, storage tank, outdoor heat exchanger, oil separator, various valves (four-way valve, electronic expansion valve, shut-off valve, etc.), and other piping in the refrigerant flow path. The overall structure is flat, replacing the space-consuming refrigerant piping structure in related technologies. This optimizes the piping structure in the indoor unit, improves piping integration, reduces piping space requirements, and decreases the overall size of the outdoor unit.

[0052] This application discloses a distribution unit for a refrigeration system, which includes a base 10. The base 10 has at least two communication ports 17 that communicate with an external pipe 50, and a chamber 11 is constructed in the base 10, with the communication ports 17 communicating with the chamber 11.

[0053] In some embodiments, the seat 10 includes a base 101 and a cover plate 102.

[0054] Please refer to Figures 1-6. The diversion unit 100 includes a base 101 and a cover plate 102. The cover plate 102 covers the base 101 and cooperates with the base 101 to form a chamber 11. Both the base 101 and the cover plate 102 have communication ports 17 for communicating with an external pipe 50, and the communication ports 17 communicate with the chamber 11. The number of communication ports 17 on the base 101 is at least two, and / or the number of communication ports 17 on the cover plate 102 is at least two. In this way, the base 101 is integrally formed, the overall processing is simple, the structure is stable, and the number of welding points is reduced, thereby avoiding media leakage. The communication ports 17 on the base 101 and the cover plate 102 are used to communicate with the external pipe 50, so that the media can enter the chamber to complete the redistribution.

[0055] The base 101 has multiple communication ports 17 on the side away from the cover plate 102. These ports 17 communicate with the chamber 11 and are used to connect to multiple external pipes 50. Thus, the base 101 connects to external pipelines through the communication ports 17, enabling the flow of the heat exchange medium. The multiple communication ports 17 allow the chamber 11 to be simultaneously connected to multiple external pipelines.

[0056] The chamber 11 has a cross-shaped cross-section. Four connecting ports 17 are located on the side of the base 101 away from the cover plate 102, at the four ends of the chamber 11. The cover plate 102 also has a connecting port 17, the projection of which onto the base 101 is located in the middle of the four connecting ports 17 on the base 101. Thus, when the refrigerant enters the chamber 11 through the connecting port 17 on the cover plate 102, its distribution is more uniform. Furthermore, the cross-shaped cross-section of the chamber 11 simplifies the refrigerant flow path within the chamber 11, and the ports at the four ends facilitate the refrigerant flow to each connecting port 17.

[0057] In some embodiments, as shown in FIG6, the cross-section of the chamber 11 is arranged in a cross shape. The base 101 has four connecting ports 17 on the side away from the cover plate 102, including a sixth connecting port 171, a seventh connecting port 172, an eighth connecting port 173, and a ninth connecting port 174. The sixth connecting port 171, the seventh connecting port 172, the eighth connecting port 173, and the ninth connecting port 174 are respectively located at the four ends of the base 101. The cover plate 102 also has a connecting port 17, defined as the tenth connecting port 175. The projection A of the tenth connecting port 175 on the base 101 is located in the middle of the sixth connecting port 171, the seventh connecting port 172, the eighth connecting port 173, and the ninth connecting port 174.

[0058] The base 101 has multiple protrusions 16 on the side away from the cover plate 102. The protrusions 16 extend away from the cover plate 102 and are hollow, forming a communication opening 17. The protrusions 16 allow for a longer axial length of the communication opening 17, resulting in a larger contact area with the external connector 50 and higher connection strength. Even with a reduced bottom wall thickness of the base 101, the insertion depth of the external connector 50 into the base 101 (i.e., into the protrusion 16) can still be guaranteed, improving the welding strength of the connector while reducing material weight.

[0059] In some embodiments, the boss 16 forms a step 18 on the inner wall of the communication port 17. The step 18 protrudes radially inward and abuts against the external connector 50. Thus, the step 18 limits the insertion depth of the external connector 50, preventing it from extending too far into the chamber 11 and affecting the normal operation of the diversion unit 100. It also supports the positioning of the external connector 50 and allows the welding ring to be placed between the external connector 50 and the step 18, improving welding reliability.

[0060] Step 18 is located at the end of the connecting port 17 near the chamber 11, and the side of step 18 near the chamber 11 is flush with the inner wall of the chamber 11 away from the cover plate 102. In this way, the structure is more regular and can reduce the turbulence of the heat exchange medium.

[0061] The base 101 has a first connecting hole 12, and the cover plate 102 has a second connecting hole 21. The positions of the first connecting hole 12 and the second connecting hole 21 are correspondingly arranged. The diversion unit 100 also includes a connector 30, which passes through and connects to the first connecting hole 12 and the second connecting hole 21. Thus, the connector 30 passes through both the first connecting hole 12 and the second connecting hole 21, forming a limiting fit with both, thereby limiting the position of the base 101 and the cover plate 102, preventing positional displacement during assembly, and improving the connection strength. Furthermore, it allows for pre-assembly of the cover plate 102 and the base 101, facilitating welding and improving welding reliability.

[0062] Specifically, the first connecting hole 12 and the second connecting hole 21 can be configured as threaded holes, and the connector 30 can be configured as a bolt or screw. In this way, the installation and disassembly of the connector 30 with the first connecting hole 12 and the second connecting hole 21 are more convenient, and the connection and disconnection with both can be achieved simply by rotating.

[0063] Understandably, in other embodiments, the connector 30 may also be configured with other connection structures, such as rivets and pins. When no threads are provided in the first connecting hole 12 and the second connecting hole 21, the connector 30 may also be connected by cooperating with a nut.

[0064] There are two first connecting holes 12, located at both ends of the diagonal of the base 101, and two second connecting holes 21, located at both ends of the diagonal of the cover plate 102. The first connecting holes 12 and the second connecting holes 21 correspond one-to-one. In this way, the cooperation of the first connecting holes 12 and the second connecting holes 21 can further improve the positioning accuracy of the base 101 and the cover plate 102 and the stability of the connection.

[0065] It should be explained that the diagonal refers to the length of the base 101 extending from one end to the other, and also from one end to the other in the width direction of the base 101.

[0066] In other embodiments, a third connecting hole and a fourth connecting hole may be added between the base 101 and the cover plate 102 to further improve the connection strength and positioning accuracy between the two.

[0067] In some embodiments, the base 101 has a receiving groove 14, and the cover plate 102 is configured as a flat plate structure. The cover plate 102 covers the opening of the receiving groove 14 to form the chamber 11. The base 101 and the cover plate 102 are welded together. In this way, the connection area between the cover plate 102 and the base 101 can be increased, thereby improving the weld connection strength.

[0068] In some embodiments, the base 101 and the cover plate 102 are connected by welding methods such as laser welding, argon arc welding, and brazing. The base 101 is formed by processes such as casting or forging.

[0069] In some embodiments, the base 101 is bent away from the receiving groove 14 to form a flange 15. A protrusion 19 is provided on the side of the flange 15 facing away from the cover plate 102. A first connecting hole 12 is formed on the flange 15 and extends to the end of the protrusion 19 away from the cover plate 102. That is, the thread extends from the side of the flange 15 near the cover plate 102 to the side of the protrusion 19 away from the cover plate 102. The depth of the first connecting hole 12 is greater than the thickness of the flange 15, thereby improving the connection strength between the connector 30 and the base 101.

[0070] It should be explained that the flange 15 is formed by bending outward from the base 101, so the area of ​​the flange 15 in the horizontal direction is greater than the wall thickness of the base 101 in the middle. In other words, the flange 15 increases the contact area between the base 101 and the cover plate 102, thereby enhancing the connection strength between the two.

[0071] This application also provides a refrigeration system, including the shunt unit 100 as described above.

[0072] In some embodiments, the refrigeration system further includes an external connector 50, one end of which is inserted into the base 101 and has a perforated structure 40 to improve the brazing pass rate.

[0073] Compared with related technologies, this application forms a diversion unit 100 by cooperating with a base 101 and a cover plate 102. The base 101 is integrally formed, which makes the overall processing simple, the structure stable, and reduces the number of welding points, thereby avoiding media leakage. The communication port 17 opened on the base 101 and the cover plate 102 is used to communicate with the external pipe 50, so that the media can enter the chamber to complete the redistribution.

[0074] Secondly, as shown in Figures 7-12, this application also provides a flow divider unit 100, applied to the circulation pipe of a refrigeration system, which can converge multiple pipes used for refrigerant flow to achieve miniaturization of the circulation pipe. Furthermore, the flow divider unit 100 is integrally molded, thus reducing manufacturing costs and lowering the risk of leakage. The refrigeration system in which the flow divider unit 100 is applied includes various implementations. Taking the application of the flow divider unit 100 in an air conditioning system as an example, the flow divider unit 100 is installed inside the outdoor unit. The outdoor unit's casing typically houses components constituting the refrigerant circuit, such as a compressor, storage tank, outdoor heat exchanger, oil separator, and various valves, as well as electrical installation units.

[0075] The distribution unit 100 of this application includes multiple external connecting pipes 50, which are used to connect to various components in the compressor, storage tank, outdoor heat exchanger, oil separator, various valves (four-way valve, electronic expansion valve, shut-off valve, etc.), and other piping in the refrigerant flow path. The overall flat structure optimizes the piping structure in the indoor unit, improves piping integration, reduces piping space occupation, and decreases the overall size of the outdoor unit.

[0076] Please refer to Figures 7-9. The distribution unit 100 includes a base 10 with at least two communication ports 17 that communicate with external pipes 50. A chamber 11 is constructed within the base 10, and the communication ports 17 communicate with the chamber 11. The base 10 is integrally formed. Thus, the external pipes 50 supply refrigerant flow, and the refrigerant enters the chamber 11 through the external pipes 50 and the communication ports 17, and can then flow through the chamber 11 into other external pipes 50. The integrally formed base 10 reduces manufacturing costs and leakage risk, ensuring the stability of the distribution unit 100 operation.

[0077] For example, the base 10 can be integrally cast. This integral casting method significantly reduces weld points and leaks. Only the external connecting pipe 50 needs to be welded to connect the chamber 11 within the diversion unit 100 to the external circulation pipeline. The base and external connecting pipe 50 can be combined by welding, resulting in a simpler structure, easier assembly, less material consumption, and lighter weight. This allows for a significant reduction in material wall thickness while maintaining strength, achieving lightweight and compact design.

[0078] In some embodiments, at least one communication port 17 is provided on each of the two sides of the base 10 in the thickness direction, that is, both sides of the base 10 in the thickness direction can communicate with the external pipe 50 to achieve a three-dimensional connection structure.

[0079] In some embodiments, the seat body 10 has four communication ports 17 on one side that communicate with the chamber 11. The four communication ports on one side of the seat body 10 include a first communication port 111, a second communication port 112, a third communication port 113, and a fourth communication port 114. The first communication port 111 and the second communication port 112 are respectively located at both ends of the length direction of the seat body 10, and the third communication port 113 and the fourth communication port 114 are respectively located at both ends of the width direction of the seat body 10.

[0080] One side of the base 10 has a first connecting port 111, a second connecting port 112, a third connecting port 113, and a fourth connecting port 114 that communicate with the chamber 11. The first connecting port 111 and the second connecting port 112 are respectively located at both ends of the length direction of the base 10, and the third connecting port 113 and the fourth connecting port 114 are respectively located at both ends of the width direction of the base 10. It should be noted that the first connecting port 111, the second connecting port 112, the third connecting port 113, and the fourth connecting port 114 are all connecting ports 17. The provision of four connecting ports 17 ensures that the diversion unit 100 can simultaneously communicate with four external pipes 50, thereby improving the integration of the base 10, optimizing the structure of the circulation pipeline, and reducing its size.

[0081] Understandably, in other embodiments, one side of the seat 10 may also have two, three, or five communication ports 17, etc., and is not limited to the above-described embodiments.

[0082] In some embodiments, the base has a plurality of protrusions 16 on its side, the protrusions 16 extending away from the chamber 11, and the protrusions 16 are hollow and form a communication port 17. The protrusions 16 allow for a longer axial length of the communication port 17, a larger contact area with the external connector 50, and a higher connection strength. Even with a reduced wall thickness at the bottom of the base, the insertion depth of the external connector 50 into the base, i.e., into the protrusion 16, is still guaranteed, improving the welding strength of the connector while reducing material weight.

[0083] The flow area of ​​the first connecting port 111 is larger than that of the second connecting port 112, the third connecting port 113, and the fourth connecting port 114. Thus, the first connecting port 111 serves as the main connecting port, while the other three connecting ports 17 serve as secondary connecting ports, thereby enabling the diversion unit 100 to have a diversion function of one inlet and multiple outlets or multiple inlets and one outlet.

[0084] In some embodiments, the second connection port 112, the third connection port 113, and the fourth connection port 114 are set to the same size, thus making it easier for the flow control unit 100 to control the flow rate. Understandably, in other embodiments, the four connection ports 17 may also be set to different sizes, or there may be two larger connection ports 17 with the same flow area, etc., and the number and flow area of ​​the connection ports 17 can be flexibly changed according to the working needs.

[0085] In some embodiments, the seat 10 includes a first connecting segment 103, a second connecting segment 104, a third connecting segment 105, and a fourth connecting segment 106. A first connecting port 111 is formed in the first connecting segment 103, a second connecting port 112 is formed in the second connecting segment 104, a third connecting port 113 is formed in the third connecting segment 105, and a fourth connecting port 114 is formed in the fourth connecting segment 106. The inner walls of the first connecting segment 103, the second connecting segment 104, the third connecting segment 105, and the fourth connecting segment 106 are at least partially configured as arc-shaped structures. In this way, the structure of the seat 10 is optimized, so that the seat 10 has corresponding structures for forming the first connecting port 111, the second connecting port 112, the third connecting port 113, and the fourth connecting port 114, making the structure on the seat 10 more orderly. In this embodiment, the base 10 is defined to have a centerline along its length direction. The first connecting segment 103 and the second connecting segment 104 are both located on the centerline, while the third connecting segment 105 and the fourth connecting segment 106 are arranged symmetrically with respect to the centerline.

[0086] The base 10 also has a fifth connecting port 161 that communicates with the chamber 11. The fifth connecting port 161 is located at the intersection of the first connecting section 103, the second connecting section 104, the third connecting section 105, and the fourth connecting section 106. The diameter of the inner wall of the first connecting section 103 is larger than the diameter of the inner walls of the second connecting section 104, the third connecting section 105, and the fourth connecting section 106. The fifth connecting port 161 is located at the intersection of the first connecting section 103, the second connecting section 104, the third connecting section 105, and the fourth connecting section 106, that is, it is located in a position closer to the center, so as to provide a more uniform refrigerant distribution effect. Moreover, when the fifth connecting port 161 is the inlet, the size of the first connecting section 103 and the first connecting port 111 is at its largest, which can distribute more flow.

[0087] In some embodiments, the arc-shaped structures on the first connecting port 111 and the first connecting segment 103 are coaxially arranged. Therefore, the distance between the edge of the first connecting port 111 and the inner wall of the arc-shaped structure of the first connecting segment 103 is equidistant everywhere. As a result, when the refrigerant flows into the chamber 11, the structure and inner wall it comes into contact with are more uniform. The second connecting port 112, the third connecting port 113, the fourth connecting port 114, and the second connecting segment 104, the third connecting segment 105, and the fourth connecting segment 106 corresponding to each connecting port 17 also have corresponding technical effects, which will not be described in detail here.

[0088] In some embodiments, along the axial direction of the connection port 17, the thickness of the seat 10 is defined as H, and the diameter of the inner wall of the first connecting section 103 is defined as D. The thickness H of the seat 10 and the diameter D of the inner wall of the first connecting section 103 satisfy: H < D. In this way, a flat design of the seat 10 is achieved, so that it occupies a very small thickness space, which helps to reduce the size and weight of the entire circulation pipeline.

[0089] Regarding the thickness H of the aforementioned seat 10, in order to ensure that the refrigerant entering from the first connecting port 111 with the largest flow area will not be blocked due to the small space, it is set as follows: the flow area of ​​the first connecting port 111 is defined as S1, and the thickness H of the seat 10, the diameter D of the inner wall of the first connecting section 103 and the flow area S1 of the first connecting port 111 satisfy: H×D≥S1.

[0090] Similarly, in order to ensure the smooth flow of refrigerant entering the chamber 11 from the other structures such as the second connecting port 112 with smaller flow areas, the diameter of the inner wall of the second connecting section 104 is defined as d, and the flow area of ​​the second connecting port 112 is defined as S2. The diameter d of the inner wall of the second connecting section 104 and the flow area S2 of the second connecting port 112 satisfy: H×d≥S2.

[0091] Furthermore, along the axial direction of the connection port 17, the thickness of the seat 10 is defined as H, and the thickness H of the seat 10 is less than or equal to 15 mm. In this way, the maximum thickness of the seat 10 is numerically defined, and under this limitation, the flow area of ​​the first connection port 111 will also be correspondingly limited and will not be set too large.

[0092] In some embodiments, H can be set to 14mm, 13.1mm, 9mm, 6mm, etc., and can be adaptively adjusted according to the circulation piping in the refrigeration system. When the external connecting pipes 50 are all set to be thinner, the size of the base 10 can also be reduced accordingly.

[0093] This application also provides a refrigeration system, including the diversion unit 100 as described above and an external pipe 50. One end of the external pipe 50 inserted into the communication port 17 is provided with a flower-shaped structure 40, which can improve the brazing welding qualification rate. Specifically, the flower-shaped structure 40 is configured with multiple protruding ribs, which protrude radially outward from the external pipe 50 and are spaced apart along the circumference of the external pipe 50.

[0094] In another embodiment, the floral structure 40 is knurled to form multiple solder grooves evenly distributed along the outer periphery of the outer connector 50. These solder grooves accommodate solder, thereby increasing the connection strength between the outer connector 50 and the base 10, and improving the regularity and consistency of the solder groove formation on the outer periphery of the outer connector, which is beneficial for improving processing efficiency. The outer connector 50 and the base 10 are connected by a welding ring placed at the step 18 for easy positioning. The welding ring is interference-fitted with the outer connector 50. This arrangement helps to limit the position of the welding ring, preventing it from falling off during assembly and welding, and ensuring welding stability.

[0095] All external pipes 50 can be connected to control valves. Since the external pipes 50 have two inlets and outlets, and control valves generally also have two inlets and outlets, control valves can be arranged together directly. For example, multiple control valves can be arranged directly at the lower pipe of the diversion unit 100 provided in this application and directly connected to the external pipes 50 to achieve a highly integrated arrangement without separate arrangement, which greatly shortens the length of the external pipes 50 and reduces space occupation.

[0096] Compared to related technologies, this application provides an integrally cast flow distribution unit 100 and an external connector 50 connected to the flow distribution unit 100. The external connector 50 is used to supply refrigerant flow. The refrigerant enters the chamber 11 through the external connector 50 and the connecting port 17, and can then enter other external connectors 50 through the chamber 11. The integrally cast base 10 reduces manufacturing costs and leakage risk, ensuring the stability of the flow distribution unit 100 operation.

[0097] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0098] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this patent application should be determined by the appended claims.

Claims

1. A split unit for use in a refrigeration system, characterized by, include: The base has at least two communication ports that communicate with external pipes, and a chamber is constructed in the base, with the communication ports communicating with the chamber.

2. The splitting unit according to claim 1, wherein The seat body includes a base and a cover plate. The base is integrally formed, and the cover plate covers the base and cooperates with the base to form the cavity. The base and the cover plate are provided with the communication port, and the number of communication ports on the base is at least two; and / or the number of communication ports on the cover plate is at least two.

3. The splitting unit according to claim 2, wherein The base has multiple protrusions on the side away from the cover plate, the protrusions extend away from the cover plate, and the protrusions are hollow and form the communication opening.

4. The splitting unit according to claim 3, wherein The boss forms a step on the inner wall of the communication port. The step protrudes radially inward and is used to abut against the external pipeline.

5. The diversion unit according to claim 4, wherein, The step is located at the end of the communication opening near the chamber, and the side of the step near the chamber is flush with the inner wall of the chamber away from the cover plate.

6. The splitting unit of claim 2, wherein, The cross-section of the chamber is cross-shaped, and the base has four communication ports on the side away from the cover plate. The four communication ports are located at the four ends of the chamber. The cover plate has a communication port, and the projection of the communication port on the cover plate onto the base is located in the middle of the four communication ports on the base.

7. The splitting unit of claim 2, wherein, The base has a first connection hole and the cover plate has a second connection hole. The positions of the first connection hole and the second connection hole are correspondingly arranged. The diversion unit also includes a connector, which passes through and connects to the first connection hole and the second connection hole.

8. The splitting unit according to claim 7, wherein There are two first connecting holes, which are opened at both ends of the diagonal of the base. There are two second connecting holes, which are opened at both ends of the diagonal of the cover plate. The two first connecting holes and the two second connecting holes correspond one-to-one.

9. The splitting unit of claim 8, wherein, The base has a receiving groove, and the cover plate is a flat plate structure. The cover plate covers the opening of the receiving groove to form the chamber. The base and the cover plate are connected by welding.

10. The splitting unit according to claim 9, wherein, The groove of the base is bent away from the receiving groove to form a flange. A protrusion is provided on the side of the flange facing away from the cover plate. The first connecting hole is opened on the flange and extends to the end of the protrusion away from the cover plate.

11. The splitting unit of claim 1, wherein, The base is integrally molded.

12. The splitting unit of claim 11, wherein, At least one of the communication openings is provided on each of the two sides of the base in the thickness direction.

13. The splitting unit according to claim 11 or 12, wherein One side of the seat body is provided with a first communication port, a second communication port, a third communication port and a fourth communication port that communicate with the cavity. The first communication port and the second communication port are respectively opened at both ends of the length direction of the seat body, and the third communication port and the fourth communication port are respectively opened at both ends of the width direction of the seat body.

14. The splitting unit of claim 13, wherein, The flow area of ​​the first connecting port is greater than the flow areas of the second connecting port, the third connecting port, and the fourth connecting port.

15. The splitting unit of claim 14, wherein, The seat includes a first connecting segment, a second connecting segment, a third connecting segment, and a fourth connecting segment. The first connecting port is located in the first connecting segment, the second connecting port is located in the second connecting segment, the third connecting port is located in the third connecting segment, and the fourth connecting port is located in the fourth connecting segment. The inner walls of the first connecting segment, the second connecting segment, the third connecting segment, and the fourth connecting segment are at least partially configured as arc-shaped structures.

16. The splitting unit of claim 15, wherein, Along the axial direction of the connecting port, the thickness of the seat is defined as H, and the diameter of the inner wall of the first connecting segment is defined as D. The thickness H of the seat and the diameter D of the inner wall of the first connecting segment satisfy: H < D.

17. The splitting unit of claim 16, wherein, The flow area of ​​the first connecting port is defined as S1. The thickness H of the seat, the diameter D of the inner wall of the first connecting section, and the flow area S1 of the first connecting port satisfy: H×D≥S1.

18. The splitting unit of claim 15, wherein, Along the axial direction of the connecting port, the thickness of the seat is defined as H, the diameter of the inner wall of the second connecting section is defined as d, and the flow area of ​​the second connecting port is defined as S2. The thickness H of the seat, the diameter d of the inner wall of the second connecting section, and the flow area S2 of the second connecting port satisfy: H×d≥S2.

19. The splitting unit of claim 15, wherein, The seat body also has a fifth communication port that communicates with the chamber. The fifth communication port is located at the intersection of the first connecting segment, the second connecting segment, the third connecting segment and the fourth connecting segment. The diameter of the inner wall of the first connecting segment is larger than the diameter of the inner walls of the second connecting segment, the third connecting segment and the fourth connecting segment.

20. The splitting unit of claim 11, wherein, Along the axial direction of the connecting port, the thickness of the seat is defined as H, and the thickness H of the seat is less than or equal to 15 mm.

21. A refrigeration system characterized by, It includes a diversion unit as described in any one of claims 1-20 and an external connector, wherein the external connector is fixedly connected to the communication port.

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