Flow path unit and air conditioner

Abstract

This utility model relates to the field of air conditioners, and discloses a flow path unit and an air conditioner. The flow path unit includes: a valve island, in which a refrigerant flow channel is formed, and the valve island has a flow channel opening communicating with the refrigerant flow channel; a first connecting part located on the side of a second connecting part near the valve island, the first connecting part communicating with the refrigerant flow channel through the flow channel opening, and the first connecting part and the second connecting part being welded together by a first solder part; a covering part covering the outer peripheral surface of the connecting assembly and extending along the axial direction of the connecting assembly, the covering part having a first end and a second end, and the first solder part located between the first end and the second end. Thus, by providing the covering part, the covering part can cover the welding position of the first connecting part and the second connecting part, reducing the risk of liquid flowing to the welding position of the first connecting part and the second connecting part, thereby reducing the risk of electrochemical corrosion of the connecting assembly caused by potential difference, and helping to maintain the structural strength of the connecting assembly.

Description

Technical Field

[0001] This utility model relates to the field of air conditioners, and in particular to a flow path unit and an air conditioner having the flow path unit. Background Technology

[0002] In related technologies, in air conditioners, the refrigerant flow path and valve body mounting base are typically integrated into a single device to achieve miniaturization and centralization of components. This device is a valve island, which is connected to a connecting assembly. The connecting assembly is connected to the compressor, and compressor vibration is transmitted to the valve island through the connecting assembly. Therefore, the connecting assembly and the valve island need to be securely fixed. However, the connecting assembly includes a first connecting part and a second connecting part, which are welded together. Because the first and second connecting parts are made of different materials, the high potential difference between them after welding can cause electrochemical corrosion of the connecting assembly, affecting its structural strength. Utility Model Content

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a flow path unit that can reduce the risk of electrochemical corrosion of the connection components caused by potential differences, thereby helping to maintain the structural strength of the connection components.

[0004] This utility model further proposes an air conditioner.

[0005] The flow path unit according to an embodiment of the present utility model includes: Valve island, a refrigerant flow channel is formed inside the valve island, and the valve island has a flow channel opening that communicates with the refrigerant flow channel; A connecting assembly includes a first connecting part, a second connecting part, and a first solder part. The first connecting part and the second connecting part are arranged along the axial direction of the connecting assembly. The first connecting part is located on the side of the second connecting part closer to the valve island. The first connecting part is fixed to the valve island and communicates with the refrigerant flow channel through the flow channel port. The second connecting part communicates with the flow channel port through the first connecting part. The first connecting part and the second connecting part are welded and fixed by the first solder part. The material of the first connecting part includes a first metal, and the material of the second connecting part includes a second metal. There is a potential difference between the first metal and the second metal. The cover portion covers the outer peripheral surface of the connecting assembly and extends along the axial direction of the connecting assembly. Along the axial direction of the connecting assembly, the cover portion has a first end and a second end, and a first solder portion is located between the first end and the second end. The cover portion is made of a corrosion-resistant material. The potential difference between the covered portion and the first metal is less than the potential difference between the first metal and the second metal, and / or the potential difference between the covered portion and the second metal is less than the potential difference between the first metal and the second metal; or, there is no potential difference between the covered portion and the first metal and / or the second metal.

[0006] According to the flow path unit of this utility model embodiment, by providing a covering portion, the first solder portion is located between the first end and the second end along the axial direction of the connecting component. The covering portion can cover the welding position of the first connecting portion and the second connecting portion, reducing the risk of liquid flowing to the welding position of the first connecting portion and the second connecting portion, thereby reducing the risk of electrochemical corrosion of the connecting component caused by potential difference, which is beneficial to maintaining the structural strength of the connecting component. Furthermore, by the potential difference between the covering portion and the first metal being less than the potential difference between the first metal and the second metal, and / or the potential difference between the covering portion and the second metal being less than the potential difference between the first metal and the second metal; or, there is no potential difference between the covering portion and the first metal and / or the second metal, the risk of electrochemical corrosion of the connecting component caused by potential difference is further reduced, which is more beneficial to maintaining the structural strength of the connecting component.

[0007] In some examples of this utility model, a portion of the second connecting portion extends into the first connecting portion, and at least a portion of the first solder portion is provided between the outer wall of the second connecting portion and the first connecting portion.

[0008] In some examples of this utility model, the outer wall of the second connecting part has a first limiting protrusion, the first limiting protrusion is located outside the first connecting part, and the first limiting protrusion and the end of the first connecting part opposite to the valve island are limited and matched.

[0009] In some examples of this utility model, the first connecting part has a first variable diameter section. From the first connecting part to the second connecting part, the inner diameter of the first variable diameter section gradually increases. The inner sidewall of the first variable diameter section and the end of the second connecting part facing the first connecting part are mutually restrictive and fitted.

[0010] In some examples of this invention, along the axial direction of the connecting assembly, the first solder portion is welded to the first variable diameter section and the second connecting portion.

[0011] In some examples of this utility model, the first connecting part further has a first connecting section connected to the first variable diameter section. The first connecting section is located on the side of the first variable diameter section away from the valve island. The first connecting section is welded to the second connecting part through a first solder part.

[0012] In some examples of this utility model, the second connecting part has a second variable diameter section and a second connecting section. From the first connecting part to the second connecting part, the inner diameter of the second variable diameter section gradually increases. The second connecting section is connected to one end of the second variable diameter section near the first connecting part. The first solder part welds the second connecting section and the first connecting part together.

[0013] In some examples of this utility model, the first connecting part and the valve island are an integral structure.

[0014] In some examples of this utility model, the flow path unit further includes: a second solder part, a portion of the first connecting part extending into the flow channel opening, at least a portion of the second solder part being provided between the outer side wall of the first connecting part and the inner side wall of the flow channel opening, and the second solder part welding the first connecting part and the valve island.

[0015] In some examples of this utility model, the outer wall of the first connecting part has a second limiting protrusion, the second limiting protrusion is located outside the valve island, and the second limiting protrusion and the surface of the valve island facing the second connecting part are mutually limiting and engaged.

[0016] In some examples of this utility model, a third limiting protrusion is formed on the inner sidewall of the flow channel opening. Along the axial direction of the flow channel opening, the third limiting protrusion is located on the side of the first connecting portion away from the second connecting portion, and the third limiting protrusion and the first connecting portion are in contact and limited.

[0017] In some examples of this utility model, the second solder part is located on the side of the third limiting protrusion facing the first connecting part, and the second solder part and the third limiting protrusion are welded together.

[0018] In some examples of this invention, the valve island and the first connecting part are made of the same metal; or The valve island is made of a third metal, and the potential difference between the third metal and the first metal is smaller than the potential difference between the first metal and the second metal.

[0019] In some examples of this invention, the corrosion-resistant material is made of at least one of inorganic and organic materials, wherein the inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid; and / or The first metal is aluminum or iron, and the first connecting part is an aluminum tube or a stainless steel tube; and / or The second metal is copper, and the second connecting part is a copper pipe; and / or The third metal is aluminum or iron, and the valve island is made of aluminum, cast iron, or stainless steel.

[0020] The air conditioner according to an embodiment of the present invention includes the flow path unit described above.

[0021] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is an assembly diagram of the flow path unit, electronic expansion valve, shut-off valve, and four-way valve according to an embodiment of the present utility model. Figure 2 This is a cross-sectional view of the valve island, cover, and connecting assembly according to an embodiment of the present invention (first embodiment). Figure 3 This is a cross-sectional view of the valve island, cover, and connecting assembly according to an embodiment of the present invention (second embodiment). Figure 4 This is a cross-sectional view of the valve island, cover, and connecting assembly according to an embodiment of the present utility model (third embodiment). Figure 5 This is a cross-sectional view of the valve island, cover, and connecting assembly according to an embodiment of the present invention (fourth embodiment).

[0023] Figure label: Flow path unit 100; Valve island 10; refrigerant flow channel 11; flow channel opening 12; third limiting protrusion 13; Connection component 20; First connecting part 21; first variable diameter section 211; first connecting section 212; second limiting protrusion 213; third connecting section 214; Second connecting part 22; First limiting protrusion 221; Second variable diameter section 222; Second connecting section 223; First Solder Section 23; Covering part 30; First end 31; Second solder section 40; Electronic expansion valve 200; shut-off valve 300; four-way valve 400. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] The following is for reference. Figures 2-5 Describes the flow path unit 100 according to an embodiment of the present utility model.

[0026] like Figures 2-5As shown, the flow path unit 100 according to an embodiment of the present invention includes: a valve island 10, in which a refrigerant flow channel 11 is formed, and the valve island 10 has a flow channel opening 12 communicating with the refrigerant flow channel 11; and a connecting assembly 20, which includes a first connecting portion 21, a second connecting portion 22, and a first solder portion 23. The first connecting portion 21 and the second connecting portion 22 are arranged along the axial direction of the connecting assembly 20. The first connecting portion 21 is located on the side of the second connecting portion 22 closer to the valve island 10. The first connecting portion 21 is fixed to the valve island 10 and communicates with the refrigerant flow channel 11 through the flow channel opening 12. The second connecting portion 22 communicates with the flow channel opening 12 through the first connecting portion 21. The first connecting portion 21 and the second connecting portion 22 are welded and fixed together by the first solder portion 23. The material of the first connecting portion 21 includes a first metal, and the material of the second connecting portion 22 includes a second metal. There is a potential difference between the first metal and the second metal. The covering portion 30 covers the outer peripheral surface of the connecting assembly 20 and extends along the axial direction of the connecting assembly 20. Along the axial direction of the connecting assembly 20, the covering portion 30 has a first end 31 and a second end, and a first solder portion 23 is located between the first end 31 and the second end. The covering portion 30 is made of a corrosion-resistant material. The potential difference between the covering portion 30 and the first metal is less than the potential difference between the first metal and the second metal, and / or, the potential difference between the covering portion 30 and the second metal is less than the potential difference between the first metal and the second metal; or, there is no potential difference between the covering portion 30 and the first metal and / or the second metal.

[0027] The valve island 10 is made of a metallic material; for example, it can be made of aluminum, iron, stainless steel, or similar materials. A refrigerant flow channel 11 is formed within the valve island 10, and the valve island 10 has a flow channel opening 12 that communicates with the refrigerant flow channel 11. As some embodiments of this application, the refrigerant can flow within the refrigerant flow channel 11 and through the flow channel opening 12 to other components.

[0028] The connecting component 20 is made of a metal material; for example, the material of the connecting component 20 can be, but is not limited to, copper, stainless steel, etc. The first connecting portion 21 and the second connecting portion 22 are arranged sequentially along the axial direction of the connecting component 20, with the second connecting portion 22 located on the side of the first connecting portion 21 facing away from the valve island 10. The first connecting portion 21 is fixed to the valve island 10. As some embodiments of this application, a portion of the structure of the first connecting portion 21 extends into the flow channel opening 12, and the portion of the first connecting portion 21 extending into the flow channel opening 12 is interference-fitted into the flow channel opening 12, thereby fixing the first connecting portion 21 to the valve island 10. As some embodiments of this application, the first connecting portion 21 and the valve island 10 are welded together, thereby fixing the first connecting portion 21 to the valve island 10. By fixing the first connecting portion 21 to the valve island 10, the connecting component 20 can be reliably fixed to the valve island 10, thereby firmly fixing the connecting component 20 and the valve island 10. The first connecting part 21 is connected to the refrigerant channel 11 through the flow port 12. In other words, the flow port 12 connects the first connecting part 21 and the refrigerant channel 11. The first connecting part 21 connects the second connecting part 22 and the flow port 12. The first connecting part 21 and the second connecting part 22 are welded and fixed by the first solder part 23, thereby reliably fixing the first connecting part 21 and the second connecting part 22 and improving the connection strength of the first connecting part 21 and the second connecting part 22.

[0029] The cover portion 30 can be made of materials such as plastic, rubber, or sealant. The cover portion 30 has a ring structure and is fitted onto the outer peripheral surface of the connecting component 20. The cover portion 30 and the outer peripheral surface of the connecting component 20 are in close contact, and the cover portion 30 tightly wraps around the connecting component 20. The cover portion 30 extends along the axial direction of the connecting component 20. Along the axial direction of the connecting component 20, the cover portion 30 has a first end 31 and a second end, and the first solder portion 23 is located between the first end 31 and the second end. In other words, the cover portion 30 is fitted onto the outside of the first solder portion 23, and along the axial direction of the connecting component 20, both ends of the cover portion 30 extend beyond the corresponding ends of the first solder portion 23. In this application, since a covering part 30 is provided, the covering part 30 can cover the welding position of the first connecting part 21 and the second connecting part 22. In other words, the covering part 30 can cover the connection between the first connecting part 21 and the second connecting part 22, reducing the risk of liquid flowing to the welding position of the first connecting part 21 and the second connecting part 22, thereby reducing the risk of electrochemical corrosion of the connecting assembly 20 caused by potential difference, which is beneficial to maintaining the connection strength of the first connecting part 21 and the second connecting part 22, and thus beneficial to maintaining the structural strength of the connecting assembly 20.

[0030] As an example, the potential difference between the cover portion 30 and the first metal is less than the potential difference between the first metal and the second metal. As another example, the potential difference between the cover portion 30 and the second metal is less than the potential difference between the first metal and the second metal. As yet another example, the potential difference between the cover portion 30 and the first metal is less than the potential difference between the first metal and the second metal, and the potential difference between the cover portion 30 and the second metal is also less than the potential difference between the first metal and the second metal. As yet another example, there is no potential difference between the cover portion 30 and the first metal and / or the second metal. This arrangement further reduces the risk of electrochemical corrosion of the connection assembly 20 caused by potential differences, and is more conducive to maintaining the structural strength of the connection assembly 20.

[0031] Therefore, by providing the covering portion 30, with the first solder portion 23 located between the first end 31 and the second end along the axial direction of the connecting assembly 20, the covering portion 30 can cover the welding positions of the first connecting portion 21 and the second connecting portion 22, reducing the risk of liquid flowing to the welding positions of the first connecting portion 21 and the second connecting portion 22, thereby reducing the risk of electrochemical corrosion of the connecting assembly 20 caused by potential difference, which is beneficial to maintaining the structural strength of the connecting assembly 20. Furthermore, by ensuring that the potential difference between the covering portion 30 and the first metal is less than the potential difference between the first metal and the second metal, and / or that the potential difference between the covering portion 30 and the second metal is less than the potential difference between the first metal and the second metal; or that there is no potential difference between the covering portion 30 and the first metal and / or the second metal, the risk of electrochemical corrosion of the connecting assembly 20 caused by potential difference can be further reduced, which is even more beneficial to maintaining the structural strength of the connecting assembly 20.

[0032] As some embodiments of this application, such as Figure 1 As shown, the air conditioner includes a flow path unit 100, an electronic expansion valve 200, a shut-off valve 300, and a four-way valve 400. The valve island 10 can be connected to the electronic expansion valve 200, shut-off valve 300, and four-way valve 400 via a connecting component 20, thereby integrating the electronic expansion valve 200, shut-off valve 300, and four-way valve 400 into the valve island 10. In some embodiments of this application, one end of the connecting component 20 is connected to the valve island 10, and the other end of the connecting component 20 is connected to the corresponding valve body (e.g., the electronic expansion valve 200, shut-off valve 300, four-way valve 400, etc.). In some embodiments of this application, the connecting component 20 can be integrally formed with the corresponding valve body.

[0033] In some embodiments of this utility model, such as Figures 2-5 As shown, a portion of the second connecting portion 22 extends into the first connecting portion 21, and at least a portion of the first solder portion 23 is provided between the outer wall of the second connecting portion 22 and the first connecting portion 21.

[0034] In this embodiment, the second connecting portion 22 extends into the first connecting portion 21 at one end. At least a portion of the first solder portion 23 is provided between the outer wall of the second connecting portion 22 extending into the first connecting portion 21 and the inner wall of the first connecting portion 21. In some embodiments of this application, the first solder portion 23 fills the space between the outer wall of the second connecting portion 22 and the inner wall of the first connecting portion 21 along the circumference of the connecting assembly 20. By partially extending the second connecting portion 22 into the first connecting portion 21, the first connecting portion 21 can be fitted onto the outside of the second connecting portion 22, which improves the structural compactness of the connecting assembly 20. Furthermore, the provision of at least a portion of the first solder portion 23 between the outer wall of the second connecting portion 22 and the first connecting portion 21 allows for reliable welding and fixing of the first connecting portion 21 and the second connecting portion 22, further enhancing the structural compactness of the connecting assembly 20.

[0035] In some embodiments of this utility model, such as Figure 3 As shown, the outer wall of the second connecting part 22 has a first limiting protrusion 221. The first limiting protrusion 221 is located outside the first connecting part 21, and the first limiting protrusion 221 and the end of the first connecting part 21 opposite to the valve island 10 are limited and matched.

[0036] The outer wall of the second connecting portion 22 has a first limiting protrusion 221. As an example, the first limiting protrusion 221 can be annular, and is arranged around the second connecting portion 22 circumferentially. As another example, there are multiple first limiting protrusions 221, which are arranged at intervals along the circumferential direction of the second connecting portion 22. The first limiting protrusion 221 is located outside the first connecting portion 21, along the axial direction of the connecting assembly 20, on the side of the first connecting portion 21 facing the second connecting portion 22. The first limiting protrusion 221 and the first connecting part 21 opposite to the valve island 10 can be in direct contact for limiting cooperation, or the first limiting protrusion 221 and the first connecting part 21 opposite to the valve island 10 can be indirect for limiting cooperation. In this case, a first solder part 23 can be provided between the first limiting protrusion 221 and the first connecting part 21 opposite to the valve island 10, which is beneficial to increase the setting area of ​​the first solder part 23 and can reliably fix the first connecting part 21 and the second connecting part 22.

[0037] By setting the first limiting protrusion 221, after the second connecting part 22 extends into the first connecting part 21 and reaches its full position, the first limiting protrusion 221 and the end of the first connecting part 21 facing away from the valve island 10 are mutually limiting and engaged, constraining the insertion depth of the second connecting part 22 into the first connecting part 21, and positioning the relative position of the first connecting part 21 and the second connecting part 22, making the connection between the first connecting part 21 and the second connecting part 22 more secure. The first limiting protrusion 221 also prevents the second connecting part 22 from falling into the first connecting part 21, resulting in a higher connection strength between the first connecting part 21 and the second connecting part 22.

[0038] In some embodiments of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, the first connecting part 21 has a first variable diameter section 211. From the first connecting part 21 to the second connecting part 22, the inner diameter of the first variable diameter section 211 gradually increases. The inner sidewall of the first variable diameter section 211 and the end of the second connecting part 22 facing the first connecting part 21 are mutually constrained.

[0039] The first connecting portion 21 has a first variable diameter section 211. As one example, the first variable diameter section 211 is located at the end of the first connecting portion 21 away from the valve island 10. As another example, the first variable diameter section 211 is located in the middle of the first connecting portion 21. From the first connecting portion 21 to the second connecting portion 22, the inner diameter of the first variable diameter section 211 gradually increases, and the inner sidewall of the first variable diameter section 211 is a slope.

[0040] After the second connecting part 22 extends into the first connecting part 21 and is fully inserted, the end of the second connecting part 22 facing the first connecting part 21 contacts and limits its insertion depth. This constraint, achieved through the first changing diameter section 211, restricts the insertion depth of the second connecting part 22 into the first connecting part 21, thus positioning the relative positions of the first connecting part 21 and the second connecting part 22 and making the connection between them more secure. For example, in some embodiments, such as... Figure 2 , Figure 4 and Figure 5 As shown, the first variable diameter section 211 makes it less likely for the second connecting part 22 to fall into the first connecting part 21, and the connection strength between the first connecting part 21 and the second connecting part 22 is higher.

[0041] In some embodiments of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, along the axial direction of the connecting assembly 20, the first solder part 23 is welded to the first variable diameter section 211 and the second connecting part 22.

[0042] Along the axial direction of the connecting assembly 20, the first solder part 23 is located on the side of the first variable diameter section 211 away from the valve island 10. The end of the first solder part 23 facing the first variable diameter section 211 is connected to the first variable diameter section 211, which helps to further increase the setting area of ​​the first solder part 23, so that the first connecting part 21 and the second connecting part 22 can be more reliably fixed, further improving the connection strength between the first connecting part 21 and the second connecting part 22, so as to achieve a firm connection between the first connecting part 21 and the second connecting part 22.

[0043] In some embodiments of this utility model, the insertion depth of the second connecting part 22 into the first connecting part 21 is adjusted by the inclination of the first variable diameter section 211, thereby adjusting the contact area between the first variable diameter section 211 and the outer wall surface of the second connecting part 22. This allows for the connection of more parts of the second connecting part 22 with the first variable diameter section 211 while constraining the insertion depth of the second connecting part 22, maximizing the contact area between the second connecting part 22 and the first connecting part 21. This improves the connection strength between the second connecting part 22 and the first connecting part 21, making the flow path unit 100 less prone to rupture and heat exchange medium leakage, thus ensuring good safety.

[0044] In some embodiments of this utility model, such as Figure 2 , Figure 4 and Figure 5 As shown, the first connecting part 21 also has a first connecting section 212 connected to the first variable diameter section 211. The first connecting section 212 is located on the side of the first variable diameter section 211 away from the valve island 10. The first connecting section 212 is welded to the second connecting part 22 through the first solder part 23.

[0045] The first connecting part 21 also has a first connecting section 212, which is adjacent to and connected to the first variable diameter section 211. The end of the first variable diameter section 211 away from the valve island 10 is connected to the first connecting section 212. The first connecting section 212 can be a pipe section of equal diameter. A first solder part 23 is provided between the first connecting section 212 and the part of the second connecting part 22 that extends into the first connecting part 21, so that the first connecting section 212 is fixedly connected to the second connecting part 22 through the first solder part 23, which is beneficial to further improve the connection strength between the second connecting part 22 and the first connecting part 21.

[0046] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, the second connecting portion 22 has a second variable diameter section 222 and a second connecting section 223. From the first connecting portion 21 to the second connecting portion 22, the inner diameter of the second variable diameter section 222 gradually increases. The second connecting section 223 is connected to the end of the second variable diameter section 222 that is close to the first connecting portion 21. The first solder portion 23 welds the second connecting section 223 and the first connecting portion 21 together.

[0047] The second connecting portion 22 includes a second variable diameter section 222 and a second connecting section 223, which are adjacent to and connected. The second variable diameter section 222 is located on the side of the second connecting section 223 opposite to the first connecting portion 21. The second connecting section 223 can be a pipe section of equal diameter, and at least a portion of the second connecting section 223 extends into the first connecting portion 21. From the first connecting portion 21 to the second connecting portion 22, the inner diameter of the second variable diameter section 222 gradually increases, and the outer wall of the second variable diameter section 222 is a slope. After the second connecting part 22 extends into the first connecting part 21 and is fully inserted, the outer wall of the second variable diameter section 222 and the end of the first solder part 23 facing away from the first connecting part 21 are connected. This constrains the insertion depth of the second connecting part 22 into the first connecting part 21 through the second variable diameter section 222 and the first solder part 23, positioning the relative position of the second connecting part 22 and the first connecting part 21, making the connection between the second connecting part 22 and the first connecting part 21 more secure. The second variable diameter section 222 also makes it less likely for the second connecting part 22 to fall into the first connecting part 21, resulting in a higher connection strength between the second connecting part 22 and the first connecting part 21.

[0048] In some embodiments of this utility model, such as Figure 5 As shown, the first connecting part 21 and the valve island 10 are an integral structure.

[0049] As one example, the first connecting part 21 and the valve island 10 can be integrally cast; as another example, they can be integrally injection molded; and as yet another example, they can be die-cast. By making the first connecting part 21 and the valve island 10 an integral structure, the connection strength between them is improved, the risk of separation is reduced, and the connection between them is reliably sealed, reducing the risk of refrigerant leakage.

[0050] In some embodiments of this utility model, such as Figures 2-4 As shown, the flow path unit 100 further includes: a second solder section 40, a portion of the first connecting portion 21 extending into the flow channel opening 12, at least a portion of the second solder section 40 being provided between the outer side wall of the first connecting portion 21 and the inner side wall of the flow channel opening 12, and the second solder section 40 welding the first connecting portion 21 and the valve island 10 together.

[0051] The flow path unit 100 may further include a second solder section 40. The first connecting section 21 may include a third connecting segment 214. The third connecting segment 214 extends into the flow channel opening 12. At least a portion of the second solder section 40 is provided between the outer side wall of the third connecting segment 214 and the inner side wall of the flow channel opening 12. The second solder section 40 is connected to both the third connecting segment 214 and the inner side wall of the flow channel opening 12, thereby enabling the first connecting section 21 and the valve island 10 to be welded and fixed, achieving the connection effect between the first connecting section 21 and the valve island 10.

[0052] In some embodiments of this utility model, such as Figure 3 As shown, the outer wall of the first connecting part 21 has a second limiting protrusion 213. The second limiting protrusion 213 is located outside the valve island 10, and the second limiting protrusion 213 and the surface of the valve island 10 facing the second connecting part 22 are mutually limiting and engaged.

[0053] The outer wall of the first connecting portion 21 has a second limiting protrusion 213. As an example, the second limiting protrusion 213 can be annular, and is arranged around the first connecting portion 21 circumferentially. As another example, there are multiple second limiting protrusions 213, which are arranged sequentially at intervals along the circumferential direction of the first connecting portion 21. The second limiting protrusion 213 is located outside the valve island 10, along the axial direction of the connecting assembly 20, on the side of the valve island 10 facing the second connecting portion 22. The second limiting protrusion 213 and the surface of the valve island 10 facing the second connecting part 22 can be in direct contact for limiting cooperation, or the second limiting protrusion 213 and the surface of the valve island 10 facing the second connecting part 22 can be indirect for limiting cooperation. In this case, a second solder part 40 can be provided between the second limiting protrusion 213 and the surface of the valve island 10 facing the second connecting part 22, which is beneficial to increase the setting area of ​​the second solder part 40 and can reliably fix the first connecting part 21 and the valve island 10.

[0054] By providing a second limiting protrusion 213, after the first connecting part 21 extends into the flow channel 12 and reaches its full position, the second limiting protrusion 213 and the valve island 10 engage in a limiting fit, constraining the insertion depth of the first connecting part 21 into the flow channel 12 and positioning the relative position of the first connecting part 21 and the valve island 10, thus making the connection between the first connecting part 21 and the valve island 10 more secure. The second limiting protrusion 213 also prevents the first connecting part 21 from falling into the valve island 10, resulting in a stronger connection between the first connecting part 21 and the valve island 10.

[0055] In some embodiments of this utility model, such as Figure 2 and Figure 4As shown, a third limiting protrusion 13 is formed on the inner sidewall of the flow channel 12. Along the axial direction of the flow channel 12, the third limiting protrusion 13 is located on the side of the first connecting portion 21 away from the second connecting portion 22, and the third limiting protrusion 13 and the first connecting portion 21 are in contact and limited.

[0056] The inner wall of the flow channel 12 has a third limiting protrusion 13, which is adjacent to the end of the flow channel 12 facing away from the first connecting portion 21. As an example, the third limiting protrusion 13 can be annular, extending circumferentially along the flow channel 12. As another example, there can be multiple third limiting protrusions 13, arranged sequentially at intervals along the circumference of the flow channel 12. By providing the third limiting protrusion 13, after the first connecting portion 21 extends into the flow channel 12 and reaches its full position, the third limiting protrusion 13 and the end of the first connecting portion 21 facing away from the second connecting portion 22 engage in a limiting fit, constraining the insertion depth of the first connecting portion 21 into the flow channel 12. This positions the first connecting portion 21 relative to the valve island 10, making the connection between the first connecting portion 21 and the valve island 10 more secure. The third limiting protrusion 13 makes it less likely for the first connecting part 21 to fall into the valve island 10, and the connection strength between the first connecting part 21 and the valve island 10 is higher.

[0057] In some embodiments of this utility model, such as Figure 2 and Figure 4 As shown, the second solder part 40 is located on the side of the third limiting protrusion 13 facing the first connecting part 21, and the second solder part 40 and the third limiting protrusion 13 are welded together.

[0058] Along the axial direction of the connecting assembly 20, the second solder part 40 is located on the side of the third limiting protrusion 13 facing the first connecting part 21. The second solder part 40 is located between the inner sidewall of the flow channel 12 and the outer sidewall of the first connecting part 21. The end of the second solder part 40 facing the third limiting protrusion 13 is connected to the third limiting protrusion 13, which further enhances the connection strength between the first connecting part 21 and the valve island 10. In addition, the third limiting protrusion 13 can shield the second solder part 40, reducing the risk of the second solder part 40 penetrating into the refrigerant flow channel 11.

[0059] In some embodiments of this utility model, the valve island 10 and the first connecting portion 21 are made of the same metal; or Valve island 10 is made of a third metal, and the potential difference between the third metal and the first metal is smaller than the potential difference between the first metal and the second metal.

[0060] As one example, both the valve island 10 and the first connecting portion 21 can be made of aluminum; as another example, both can be made of stainless steel. By using the same material for both the valve island 10 and the first connecting portion 21, the risk of a potential difference between them is reduced, thereby reducing the risk of electrochemical corrosion caused by the potential difference. This helps maintain the structural strength and connection strength of the valve island 10 and the first connecting portion 21.

[0061] As another example, the valve island 10 is made of a third metal. The potential difference between the third metal and the first metal is smaller than the potential difference between the first metal and the second metal. This further reduces the risk of electrochemical corrosion of the valve island 10 and the first connection part 21 caused by the potential difference. This is beneficial to maintaining the structural strength of the valve island 10 and the first connection part 21, and also beneficial to maintaining the connection strength of the valve island 10 and the first connection part 21.

[0062] In some embodiments of this utility model, the first connecting part 21 and the second connecting part 22 are made of different metal materials.

[0063] As an example, the first connecting part 21 is made of aluminum, and the second connecting part 22 is made of copper. As another example, the first connecting part 21 is made of aluminum, and the second connecting part 22 is made of stainless steel. This application uses the example of the first connecting part 21 being made of aluminum and the second connecting part 22 being made of copper for illustration. By welding copper and aluminum tubes, the performance of copper and aluminum materials is complementary, retaining the high reliability of copper while utilizing the lightweight and low-cost advantages of aluminum, and simultaneously solving pain points such as leakage, overheating, and difficult maintenance in mechanical connections.

[0064] In some embodiments of this invention, the corrosion-resistant material is made of at least one of inorganic and organic materials, wherein the inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid; and / or The first metal is aluminum or iron, and the first connecting part 21 is an aluminum tube or a stainless steel tube. And / or the second metal is copper, and the second connecting part 22 is a copper pipe; And / or the third metal is aluminum or iron, and the valve island 10 is made of aluminum, cast iron or stainless steel.

[0065] As an example, the corrosion-resistant material is made of at least one of inorganic and organic materials, wherein the inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid. As another example, the first metal is aluminum or iron, and the first connecting part 21 is an aluminum tube or a stainless steel tube. As another example, the second metal is copper, and the second connecting part 22 is a copper tube. As yet another example, the third metal is aluminum or iron, and the valve island 10 is made of aluminum, cast iron, or stainless steel.

[0066] As another example, the corrosion-resistant material is made of at least one of inorganic and organic materials. The inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid. The first metal is aluminum or iron, and the first connecting part 21 is an aluminum tube or a stainless steel tube. As another example, the corrosion-resistant material is made of at least one of inorganic and organic materials. The inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid. The second metal is copper, and the second connecting part 22 is a copper tube. As another example, the corrosion-resistant material is made of at least one of inorganic and organic materials. The inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid. The third metal is aluminum or iron, and the valve island 10 is an aluminum part, a cast iron part, or a stainless steel part. As another example, the first metal is aluminum or iron, the first connecting part 21 is an aluminum tube or a stainless steel tube, the second metal is copper, and the second connecting part 22 is a copper tube. As another example, the first metal is aluminum or iron, the first connecting part 21 is an aluminum tube or a stainless steel tube, the third metal is aluminum or iron, and the valve island 10 is an aluminum part, a cast iron part, or a stainless steel part. As another example, the second metal is copper, the second connecting part 22 is a copper tube, the third metal is aluminum or iron, and the valve island 10 is an aluminum part, a cast iron part, or a stainless steel part. As another example, the corrosion-resistant material is made of at least one of inorganic and organic materials. The inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid. The first metal is aluminum or iron, the first connecting part 21 is an aluminum tube or a stainless steel tube, the second metal is copper, the second connecting part 22 is a copper tube, the third metal is aluminum or iron, and the valve island 10 is an aluminum part, a cast iron part, or a stainless steel part. It should be noted that inorganic materials may include zinc, tin, etc., and organic materials may include epoxy resin, polyurethane, acrylic acid, etc. The corrosion-resistant material is made of at least one of inorganic materials such as tin and zinc, and organic materials such as epoxy resin, polyurethane, and acrylic acid. In the above technical solution, this arrangement can further reduce the risk of liquid flowing to the welding position of the first connection part 21 and the second connection part 22, thereby reducing the risk of electrochemical corrosion of the connection component 20 caused by potential difference, which is beneficial to maintaining the structural strength of the connection component 20, and also beneficial to controlling the manufacturing cost of the flow path unit 100.

[0067] The air conditioner according to an embodiment of the present invention includes the flow path unit 100 described in the above embodiment. The flow path unit 100 is disposed in the air conditioner to reduce the risk of electrochemical corrosion of the connecting component 20 caused by potential difference, which helps maintain the structural strength of the connecting component 20, thereby improving the operational reliability of the air conditioner.

[0068] Other components of the air conditioner according to embodiments of the present invention, such as the evaporator and condenser, as well as its operation, are known to those skilled in the art and will not be described in detail here.

[0069] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0070] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A flow path unit, characterized in that, include: A valve island, wherein a refrigerant flow channel is formed within the valve island, and the valve island has a flow channel opening communicating with the refrigerant flow channel; A connecting assembly includes a first connecting portion, a second connecting portion, and a first solder portion. The first connecting portion and the second connecting portion are arranged along the axial direction of the connecting assembly. The first connecting portion is located on the side of the second connecting portion closer to the valve island. The first connecting portion is fixed to the valve island and communicates with the refrigerant flow channel through the flow channel opening. The second connecting portion communicates with the flow channel opening through the first connecting portion. The first connecting portion and the second connecting portion are welded and fixed by the first solder portion. The material of the first connecting portion includes a first metal, and the material of the second connecting portion includes a second metal. There is a potential difference between the first metal and the second metal. A cover portion, the cover portion covering the outer peripheral surface of the connecting assembly and extending along the axial direction of the connecting assembly, the cover portion having a first end and a second end along the axial direction of the connecting assembly, the first solder portion being located between the first end and the second end, the cover portion being made of a corrosion-resistant material; The potential difference between the covering portion and the first metal is less than the potential difference between the first metal and the second metal, and / or, The potential difference between the covering portion and the second metal is less than the potential difference between the first metal and the second metal; or, There is no potential difference between the covered portion and the first metal and / or the second metal.

2. The flow path unit according to claim 1, characterized in that, A portion of the second connecting part extends into the first connecting part, and at least a portion of the first solder part is provided between the outer wall of the second connecting part and the first connecting part.

3. The flow path unit according to claim 2, characterized in that, The outer wall of the second connecting part has a first limiting protrusion, which is located outside the first connecting part, and the first limiting protrusion and the end of the first connecting part away from the valve island are mutually limiting and engaged.

4. The flow path unit according to claim 2, characterized in that, The first connecting portion has a first variable diameter section. From the first connecting portion to the second connecting portion, the inner diameter of the first variable diameter section gradually increases. The inner sidewall of the first variable diameter section and the end of the second connecting portion facing the first connecting portion are mutually restrictive and fitted.

5. The flow path unit according to claim 4, characterized in that, Along the axial direction of the connecting assembly, the first solder portion welds together the first variable diameter section and the second connecting portion.

6. The flow path unit according to claim 4, characterized in that, The first connecting part also has a first connecting section connected to the first variable diameter section. The first connecting section is located on the side of the first variable diameter section away from the valve island. The first connecting section is welded to the second connecting part through the first solder part.

7. The flow path unit according to claim 2, characterized in that, The second connecting portion has a second variable diameter section and a second connecting section. From the first connecting portion to the second connecting portion, the inner diameter of the second variable diameter section gradually increases. The second connecting section is connected to one end of the second variable diameter section near the first connecting portion. The first solder portion welds the second connecting section and the first connecting portion together.

8. The flow path unit according to claim 1, characterized in that, The first connecting part and the valve island are an integral structure.

9. The flow path unit according to claim 1, characterized in that, The flow path unit further includes: a second solder section, a portion of the first connecting portion extending into the flow channel opening, at least a portion of the second solder section being provided between the outer side wall of the first connecting portion and the inner side wall of the flow channel opening, the second solder section being welded to the first connecting portion and the valve island.

10. The flow path unit according to claim 9, characterized in that, The outer wall of the first connecting part has a second limiting protrusion, which is located outside the valve island and is in a limiting fit with the surface of the valve island facing the second connecting part.

11. The flow path unit according to claim 9, characterized in that, A third limiting protrusion is formed on the inner sidewall of the flow channel opening. Along the axial direction of the flow channel opening, the third limiting protrusion is located on the side of the first connecting portion away from the second connecting portion, and the third limiting protrusion and the first connecting portion are in contact and limited.

12. The flow path unit according to claim 11, characterized in that, The second solder portion is located on the side of the third limiting protrusion facing the first connecting portion, and the second solder portion and the third limiting protrusion are welded together.

13. The flow path unit according to any one of claims 1-12, characterized in that, The valve island and the first connecting part are made of the same metal; or The valve island is made of a third metal, and the potential difference between the third metal and the first metal is less than the potential difference between the first metal and the second metal.

14. The flow path unit according to claim 13, characterized in that, The corrosion-resistant material is made of at least one of inorganic and organic materials, wherein the inorganic material includes at least one of tin and zinc, and the organic material includes at least one of epoxy resin, polyurethane, and acrylic acid; and / or The first metal is aluminum or iron, and the first connecting part is an aluminum tube or a stainless steel tube; and / or The second metal is copper, and the second connecting part is a copper pipe; and / or The third metal is aluminum or iron, and the valve island is made of aluminum, cast iron, or stainless steel.

15. An air conditioner, characterized in that, Includes the flow path unit according to any one of claims 1-14.

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