Flow path unit and air conditioner

Abstract

The utility model discloses a flow path unit and air conditioner relates to air conditioner field, and flow path unit includes: valve island, connecting pipe, solder part, and valve island forms the connecting hole of refrigerant flow channel and refrigerant flow channel intercommunication, and connecting pipe includes: fit pipe section, and fit pipe section is located in connecting hole, and the portion of fit pipe section is with the interference fit of connecting hole, and solder part sets up between connecting hole and connecting pipe, and connecting hole and connecting pipe are welded together through solder part. Therefore, by making valve island form connecting hole, and fit pipe section is located in connecting hole, it is convenient to fill the solder part between fit pipe section and connecting hole circumference, it is convenient to weld connecting pipe and valve island, and, by making the portion of fit pipe section is with the interference fit of connecting hole, can make fit pipe section and connecting hole coaxial arrangement, when welding connecting pipe and valve island, can make solder part distribution even, improve the welding quality, and then improve the connecting strength of connecting pipe and valve island, reduce the risk that connecting pipe and valve island disconnect.

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. Background Technology

[0002] In related technologies, the refrigerant flow path and valve body mounting base are usually integrated into a single device to achieve miniaturization and centralization of components. This device is called a valve island. However, during the assembly process of the valve island and the connecting pipe, due to the large size of the valve island, the welding between the valve island and the connecting pipe is relatively complex. During the welding process, it is difficult to ensure the coaxiality of the interface between the connecting pipe and the valve island, which may lead to uneven distribution of solder in the circumferential direction of the connecting pipe, resulting in a decrease in welding quality and weak welding. Utility Model Content

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one objective of the present invention is to provide a flow path unit in which the solder is evenly distributed and the welding quality is high when the connecting pipe of the flow path unit is welded to the valve island.

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

[0005] The flow path unit according to this utility model includes: a valve island, a connecting pipe, and a solder section. The valve island has a refrigerant flow channel and a connecting hole communicating with the refrigerant flow channel. The connecting pipe includes: a mating pipe section disposed in the connecting hole, and a portion of the mating pipe section is interference-fitted with the connecting hole. The solder section is disposed between the connecting hole and the connecting pipe, and the connecting hole and the connecting pipe are welded together through the solder section.

[0006] According to the flow path unit of this utility model, by forming a connecting hole in the valve island and setting a mating pipe section in the connecting hole, it is convenient to fill the circumferential part of the welding material between the mating pipe section and the connecting hole, which facilitates the welding of the connecting pipe and the valve island. Furthermore, by making a portion of the mating pipe section interference fit with the connecting hole, the mating pipe section and the connecting hole can be arranged coaxially. When welding the connecting pipe and the valve island, the welding material can be evenly distributed, improving the welding quality, thereby increasing the connection strength between the connecting pipe and the valve island and reducing the risk of the connecting pipe and the valve island breaking apart.

[0007] In some examples of this utility model, the connecting hole includes: a first connecting hole and a second connecting hole, the second connecting hole communicating with the first connecting hole, the end of the first connecting hole facing away from the second connecting hole being constructed as an open end, the mating pipe section being disposed in the first connecting hole and contacting the first bottom wall of the first connecting hole, and a portion of the mating pipe section being interference-fitted with the side wall of the first connecting hole.

[0008] In some examples of this utility model, the mating pipe section includes: a pipe body and a protrusion. The protrusion is provided on a portion of the outer wall of the pipe body. The protrusion is disposed in the connecting hole and is press-fitted with the side wall of the hole. There is a gap between the pipe body and the side wall of the hole, and at least a portion of the solder portion fills the gap.

[0009] In some examples of this utility model, there are multiple protrusions, which surround the tube body and are arranged at intervals; the protrusions extend along the axial or circumferential direction of the tube body.

[0010] In some examples of this invention, the protrusion is constructed as a portion of a sphere.

[0011] In some examples of this utility model, the surface of the protrusion facing the sidewall of the hole is constructed as an arc surface, and a recess is formed between two adjacent protrusions along the circumference of the connecting pipe. The sidewall of the recess along the radial direction of the connecting pipe is in clearance fit or transition fit with the sidewall of the hole, and at least part of the solder portion is filled between the recess and the sidewall of the hole.

[0012] In some examples of this utility model, the protrusion is constructed as an annular structure arranged circumferentially along the tube body; or, the protrusion is constructed as a plurality of arc structures spaced apart circumferentially along the tube body.

[0013] In some examples of this utility model, along the axial direction of the connecting pipe, the protrusion is disposed at one end of the connecting pipe near the valve island, the number of the protrusions is multiple, at least a portion of the protrusions are completely disposed in the connecting hole, at least a portion of the protrusions are spaced apart from the open end, and at least a portion of the solder portion is disposed between the end of the protrusion near the open end and the open end.

[0014] In some examples of this utility model, the first connecting hole includes: a first sub-hole and a second sub-hole, the second sub-hole being connected between the first sub-hole and the second connecting hole, the first hole sidewall of the first sub-hole and the second hole sidewall of the second sub-hole being jointly constructed as the hole sidewall, the diameter of the second hole sidewall being smaller than the diameter of the first hole sidewall, the mating pipe section being interference-fitted with the second hole sidewall and having a gap with the first hole sidewall, at least a portion of the solder portion being filled in the gap.

[0015] In some examples of this invention, the second bottom wall of the first sub-hole is perpendicular to the axial direction of the connecting pipe.

[0016] In some examples of this utility model, the second bottom wall of the first sub-hole has an angle with the axial direction of the connecting pipe, and the diameter of the second bottom wall gradually decreases from the first sub-hole to the second sub-hole.

[0017] In some examples of this utility model, the mating pipe section includes: a pipe body and a protrusion, wherein a portion of the outer wall of the pipe body is provided with the protrusion, and the protrusion is interference-fitted with the side wall of the second hole; and / or, the protrusion is a plurality of spaced protrusions, and at least a portion of the solder portion is disposed between two adjacent protrusions.

[0018] In some examples of this utility model, the valve island is made of a material whose main component is a first metal, and the connecting pipe is made of a material whose main component is a second metal. The potential difference between the first metal and the second metal is less than the potential difference between aluminum and copper.

[0019] In some examples of this utility model, the first metal is aluminum and the second metal is iron; or

[0020] The first metal is iron, and the second metal is iron.

[0021] The air conditioner according to this utility model includes a housing and a flow path unit disposed within the housing, wherein the flow path unit is the flow path unit described above.

[0022] In some examples of this utility model, the air conditioner further includes a four-way valve disposed in the housing, the four-way valve including a valve body and a plurality of connector pipes communicating with the valve body, at least one of the connector pipes being welded to the end of the connecting pipe away from the valve island.

[0023] In some examples of this utility model, the valve island is made of at least one of aluminum, cast iron, and stainless steel; the connecting pipe is a stainless steel pipe; the valve body and the connector pipe are made of copper; and the connector pipe is welded to the connecting pipe using brazing material; or

[0024] The valve island is made of at least one of aluminum, cast iron, and stainless steel. The connecting pipe is a stainless steel pipe. The valve body and the connector pipe are stainless steel components. The air conditioner also includes an adapter pipe, which is a copper pipe. One end of the connector pipe is welded to the adapter pipe using brazing material, and the other end of the adapter pipe is welded to the connecting pipe using brazing material.

[0025] 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

[0026] 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:

[0027] Figure 1 This is an exploded view of the flow path unit, electronic expansion valve, shut-off valve, and four-way valve according to an embodiment of the present invention.

[0028] Figure 2 This is a cross-sectional view of the valve island and connecting pipe according to an embodiment of the present invention (first embodiment);

[0029] Figure 3 This is a cross-sectional view of the valve island and connecting pipe according to an embodiment of the present invention (second embodiment);

[0030] Figure 4 This is a cross-sectional view of the valve island and connecting pipe according to an embodiment of the present utility model (third embodiment);

[0031] Figure 5 This is a cross-sectional view of the connecting pipe according to an embodiment of the present utility model (third embodiment);

[0032] Figure 6 This is a schematic diagram of the connecting pipe according to an embodiment of the present utility model (fourth embodiment);

[0033] Figure 7 yes Figure 6 Enlarged diagram of point A in the middle.

[0034] Figure label:

[0035] Flow path unit 100; Electronic expansion valve 200; Shut-off valve 300; Four-way valve 400;

[0036] Valve island 1; connecting hole 11; first connecting hole 111; first bottom wall 1111; open end 1112; hole side wall 1113; first sub-hole 1114; first hole side wall 11141; second bottom wall 11142; second sub-hole 1115; second hole side wall 11151; second connecting hole 112; refrigerant flow channel 12;

[0037] Connecting pipe 2; mating pipe section 21; pipe body 211; protrusion 212; recess 213; side wall 214.

[0038] Solder section 3. Detailed Implementation

[0039] 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.

[0040] The following is for reference. Figures 1-7 Describes the flow path unit 100 according to an embodiment of the present utility model.

[0041] like Figures 2-4 As shown, the flow path unit 100 according to an embodiment of the present invention includes: a valve island 1, a connecting pipe 2, and a solder section 3. The valve island 1 has a refrigerant flow channel 12 and a connecting hole 11 communicating with the refrigerant flow channel 12. The connecting pipe 2 includes: a mating pipe section 21, which is disposed in the connecting hole 11, and a portion of the mating pipe section 21 is press-fitted with the connecting hole 11. The solder section 3 is disposed between the connecting hole 11 and the connecting pipe 2, and the connecting hole 11 and the connecting pipe 2 are welded together by the solder section 3.

[0042] The valve island 1 has a refrigerant flow channel 12 and a connecting hole 11 that connects the refrigerant flow channel 12. As some embodiments of this application, the refrigerant can flow in the refrigerant flow channel 12 and flow to other components through the connecting hole 11.

[0043] The fitting pipe section 21 is provided in the connection hole 11. As some embodiments of this application, the fitting pipe section 21 is housed in the connection hole 11 and is fitted with the connection hole 11. As some embodiments of this application, the fitting pipe section 21 and the connection hole 11 can be welded together.

[0044] In some embodiments of this application, the mating pipe section 21 is accommodated in the connecting hole 11, and the outer diameter of a portion of the mating pipe section 21 is slightly larger than the inner diameter of the connecting hole 11, so that the portion of the mating pipe section 21 is in an interference fit with the connecting hole 11.

[0045] As some embodiments of this application, the material of valve island 1 may be, but is not limited to, aluminum, stainless steel, etc., and the material of connecting pipe 2 may be, but is not limited to, copper, stainless steel, etc.

[0046] As some embodiments of this application, such as Figure 1As shown, the air conditioner includes a flow path unit 100 and an electronic expansion valve 200, a shut-off valve 300, and a four-way valve 400. The valve island 1 can be connected to the electronic expansion valve 200, shut-off valve 300, and four-way valve 400 via a connecting pipe 2, integrating these valves into the valve island 1. In some embodiments of this application, one end of the connecting pipe 2 (i.e., the aforementioned mating pipe section 21) is connected to the valve island 1, and the other end of the connecting pipe 2 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 pipe 2 can be integrally formed with the corresponding valve body.

[0047] As some embodiments of this application, the valve island 1 is formed with a plurality of connection holes 11, such as Figures 2-4 As shown, a refrigerant flow channel 12 is formed inside the valve island 1. The refrigerant flow channel 12 connects to at least two connection holes 11. The valve island 1 can be simply understood as integrating the conventional piping in a traditional air conditioner outdoor unit into one structure. Each connection hole 11 on the valve island 1 is equivalent to a pipe structure in a traditional air conditioner outdoor unit. Multiple different connection holes 11 are integrated on the valve island 1, and the refrigerant flow channel 12 inside the valve island 1 connects the various connection holes 11, reducing the space occupied by pipe connections in a traditional air conditioner outdoor unit. It can avoid interference with the assembly of other structures inside the air conditioner outdoor unit. The integrated design makes the overall structure of the air conditioner outdoor unit more compact, which helps to realize the miniaturization of the overall structure of the air conditioner outdoor unit and provides convenience for the installation of the air conditioner outdoor unit in a limited space.

[0048] The mating pipe section 21 of the connecting pipe 2 is provided in the connecting hole 11. Part of the mating pipe section 21 is interference-fitted with the connecting hole 11, that is, the diameter of part of the mating pipe section 21 is slightly larger than the diameter of the connecting hole 11. Furthermore, the circumferentially filled solder part 3 is used to weld the connecting pipe 2 and the valve island 1 between the mating pipe section 21 and the connecting hole 11.

[0049] Solder section 3 is disposed between connecting hole 11 and connecting pipe 2, and connecting hole 11 and connecting pipe 2 are welded together by solder section 3. Specifically, solder section 3 is disposed between connecting hole 11 and mating pipe section 21, and connecting hole 11 and mating pipe section 21 are welded together by solder section 3. As some embodiments of this application, solder section 3 circumferentially fills the space between connecting hole 11 and mating pipe section 21.

[0050] It should be noted that by making a portion of the mating pipe section 21 interference fit with the connecting hole 11, the axes of the mating pipe section 21 and the connecting hole 11 can be made concentric. When welding the connecting pipe 2 and the valve island 1, the solder portion 3 can be evenly distributed, improving the welding quality. Furthermore, since a portion of the mating pipe section 21 is interference fitted with the connecting hole 11, if there is a gap between the other portion of the mating pipe section 21 and the connecting hole 11, the solder portion 3 can be distributed in the gap between the mating pipe section 21 and the connecting hole 11, making the connection between the mating pipe section 21 and the connecting hole 11 more secure.

[0051] Therefore, by forming a connecting hole 11 in the valve island 1 and providing a mating pipe section 21 in the connecting hole 11, it is convenient to fill the circumferential solder portion 3 between the mating pipe section 21 and the connecting hole 11, which facilitates the welding of the connecting pipe 2 and the valve island 1. Furthermore, by making a portion of the mating pipe section 21 interference fit with the connecting hole 11, the mating pipe section 21 and the connecting hole 11 can be arranged coaxially. When welding the connecting pipe 2 and the valve island 1, the solder portion 3 can be evenly distributed, improving the welding quality, thereby increasing the connection strength between the connecting pipe 2 and the valve island 1 and reducing the risk of the connecting pipe 2 and the valve island 1 breaking apart.

[0052] In some embodiments of this utility model, such as Figures 2-4 As shown, the connecting hole 11 includes: a first connecting hole 111 and a second connecting hole 112. The second connecting hole 112 communicates with the first connecting hole 111. The end of the first connecting hole 111 facing away from the second connecting hole 112 is constructed as an open end 1112. A fitting pipe section 21 is provided in the first connecting hole 111 and contacts the first bottom wall 1111 of the first connecting hole 111. A portion of the fitting pipe section 21 is interference-fitted with the side wall 1113 of the first connecting hole 111.

[0053] In this embodiment, the second connecting hole 112 communicates with and is coaxially arranged with the first connecting hole 111. As some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e., Figures 2-4 (As shown in the X direction), the second connecting hole 112 and the first connecting hole 111 are arranged in sequence and connected. The end of the first connecting hole 111 that is away from the second connecting hole 112 is constructed as an open end 1112. As some embodiments of this application, the fitting pipe section 21 can extend into the first connecting hole 111 from the open end 1112.

[0054] As some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4(As shown in the X direction), the first bottom wall 1111 of the first connecting hole 111 is located at the end of the first connecting hole 111 near the second connecting hole 112. In other words, the first bottom wall 1111 of the first connecting hole 111 is located at the connection between the first connecting hole 111 and the second connecting hole 112. The mating pipe section 21 is disposed in the first connecting hole 111 and contacts the first bottom wall 1111 of the first connecting hole 111. As some embodiments of this application, the mating pipe section 21 is housed in the first connecting hole 111, and the end of the mating pipe section 21 near the second connecting hole 112 contacts the first bottom wall 1111 of the first connecting hole 111.

[0055] The portion of the fitting pipe section 21 is interference-fitted with the sidewall 1113 of the first connecting hole 111. As some embodiments of this application, the portion of the fitting pipe section 21 is housed in the first connecting hole 111, and the outer diameter of the portion of the fitting pipe section 21 is slightly larger than the diameter of the sidewall 1113 of the first connecting hole 111, so that the portion of the fitting pipe section 21 is interference-fitted with the first connecting hole 111.

[0056] By making the end of the first connecting hole 111 facing away from the second connecting hole 112 an open end 1112, it is convenient for the mating pipe section 21 to extend into the first connecting hole 111. Furthermore, by making the end of the mating pipe section 21 close to the second connecting hole 112 contact the first bottom wall 1111 of the first connecting hole 111, it is convenient to control the length of the connecting pipe 2 extending into the connecting hole 11. In addition, by making a portion of the mating pipe section 21 interference fit with the side wall 1113 of the first connecting hole 111, the coaxiality between the mating pipe section 21 and the first connecting hole 111 can be improved, the solder portion 3 can be evenly distributed, and thus the welding quality can be improved.

[0057] In some embodiments of this utility model, such as Figures 4-7 As shown, the mating pipe section 21 includes: a pipe body 211 and a protrusion 212. A portion of the outer wall of the pipe body 211 is provided with the protrusion 212. The protrusion 212 is disposed in the connecting hole 11 and is press-fitted with the side wall 1113 of the hole. There is a gap between the pipe body 211 and the side wall 1113 of the hole, and at least a portion of the solder portion 3 is filled in the gap.

[0058] In this embodiment, a portion of the outer wall of the pipe body 211 is provided with a protrusion 212. As some embodiments of this application, the connection between the portion of the outer wall of the pipe body 211 and the protrusion 212 can be, but is not limited to, welding or integral molding. The protrusion 212 is disposed within the connecting hole 11 and is press-fitted with the hole sidewall 1113. As some embodiments of this application, the protrusion 212 is disposed within the connecting hole 11, and the maximum outer diameter formed by the pipe body 211 and the protrusion 212 is slightly larger than the diameter of the hole sidewall 1113, that is, the maximum outer diameter of the mating pipe section 21 is slightly larger than the diameter of the hole sidewall 1113.

[0059] As some embodiments of this application, the number of protrusions 212 can be multiple, and the multiple protrusions 212 are evenly spaced along the circumference of the connecting pipe 2. As some embodiments of this application, the number of protrusions 212 can be one, and the protrusions 212 are constructed as an annular structure surrounding the pipe body 211.

[0060] A gap exists between the pipe body 211 and the hole sidewall 1113. Specifically, a gap exists between the portion of the pipe body 211 without the protrusion 212 and the hole sidewall 1113. At least a portion of the solder portion 3 fills the gap. As some embodiments of this application, a portion of the solder portion 3 fills the gap, or all of the solder portion 3 fills the gap. It should be noted that when welding the connecting pipe 2 and the valve island 1, the solder portion 3 can be distributed between the pipe body 211 and the hole sidewall 1113 to fill the gap, which can improve the connection strength between the connecting pipe 2 and the valve island 1.

[0061] By providing a protrusion 212 on a portion of the outer wall of the pipe body 211, and having the protrusion 212 and the hole sidewall 1113 in an interference fit, the coaxiality of the mating pipe section 21 and the first connecting hole 111 can be significantly improved. Furthermore, by creating a gap between the pipe body 211 and the hole sidewall 1113, at least a portion of the solder portion 3 can be distributed in the gap between the pipe body 211 and the hole sidewall 1113, while ensuring that the solder portion 3 is evenly distributed in the gap, thereby improving the connection strength between the connecting pipe 2 and the valve island 1.

[0062] In some embodiments of this utility model, such as Figures 4-7 As shown, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals; the protrusions 212 extend along the axial or circumferential direction of the pipe body 211.

[0063] In this embodiment, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals. As some embodiments of this application, a portion of the outer wall of the pipe body 211 is provided with protrusions 212, and the number of protrusions 212 is multiple, evenly spaced along the circumference of the connecting pipe 2. The number of protrusions 212 can be, but is not limited to, three, four, five, etc. As some embodiments of this application, such as... Figure 5 As shown, there are four protrusions 212, which surround the tube body 211 and are arranged at intervals.

[0064] The protrusions 212 extend axially or circumferentially along the pipe body 211. In some embodiments of this application, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals. Furthermore, all protrusions 212 extend axially along the pipe body 211. This arrangement allows for various arrangement forms of the protrusions 212, facilitating production according to actual needs.

[0065] This arrangement allows for a reasonable number and position of protrusions 212, facilitating processing. Furthermore, it ensures that each protrusion 212 is subjected to uniform stress, reducing the risk of stress concentration. Moreover, it significantly improves the coaxiality between the mating pipe section 21 and the first connecting hole 111.

[0066] In some embodiments of this utility model, such as Figure 4 and Figure 5 As shown, the protrusion 212 is constructed as a spherical part.

[0067] Among them, the protrusion 212 is constructed as a spherical part. As some embodiments of this application, the protrusion 212 can be constructed as a hemisphere, and the surface of the protrusion 212 is a hemispherical surface.

[0068] This configuration can further improve the coaxiality of the mating pipe section 21 and the first connecting hole 111. At the same time, it facilitates the assembly of the mating pipe section 21 and the first connecting hole 111. In addition, it can reduce the processing difficulty of the connecting pipe 2.

[0069] In some embodiments of this utility model, such as Figure 6 and Figure 7 As shown, the surface of the protrusion 212 facing the hole sidewall 1113 is arc-shaped, and a recess 213 is formed between two adjacent protrusions 212 along the circumference of the connecting pipe 2. The recess 213 is radially (i.e., Figures 2-4 The sidewall 214 (shown in the Y direction) is clearance-fitted or transition-fitted with the hole sidewall 1113, and at least part of the solder portion 3 is filled between the recess 213 and the hole sidewall 1113.

[0070] The surface of the protrusion 212 facing the hole sidewall 1113 is an arc surface. In some embodiments of this application, the curvature of the arc surface is the same as the curvature of the hole sidewall 1113, and the protrusion 212 and the hole sidewall 1113 are interference fit.

[0071] Along the circumference of the connecting pipe 2, a recess 213 is formed between two adjacent protrusions 212. As some embodiments of this application, there can be multiple protrusions 212 and recesses 213. Multiple protrusions 212 are evenly spaced along the circumference of the connecting pipe 2, and multiple recesses 213 are evenly spaced sequentially along the circumference of the connecting pipe 2. Furthermore, a recess 213 is formed between every two protrusions 212, and similarly, a protrusion 212 is formed between every two recesses 213.

[0072] The recessed portion 213 is radially along the connecting pipe 2 (i.e. Figures 2-4 The sidewall 214 (shown in the Y direction) and the hole sidewall 1113 are clearance-fitted or transition-fitted. As some embodiments of this application, along the radial direction of the connecting pipe 2 (i.e., Figures 2-4 (As shown in the Y direction), the sidewall 214 of the recess 213 is clearance-fitted with the sidewall 1113 of the hole, that is, when the protrusion 212 is interference-fitted with the sidewall 1113 of the hole, there is a gap between the sidewall 214 of the recess 213 and the sidewall 1113 of the hole. It should be noted that when welding the connecting pipe 2 and the valve island 1, at least a portion of the solder portion 3 can be distributed in the recess 213 along the radial direction of the connecting pipe 2 (i.e., in the Y direction). Figures 2-4 In the gap between the sidewall 214 (shown in the Y direction) and the hole sidewall 1113, the welding strength is improved.

[0073] As some embodiments of this application, along the radial direction of the connecting pipe 2 (i.e. Figures 2-4 (As shown in the Y direction), the sidewall 214 of the recess 213 transitions with the sidewall 1113 of the hole. When welding the connecting pipe 2 and the valve island 1, at least a portion of the solder portion 3 can be distributed in the recess 213 along the radial direction of the connecting pipe 2 (i.e., Figures 2-4 In the gap between the sidewall 214 (shown in the Y direction) and the hole sidewall 1113, the connection strength between the connecting pipe 2 and the valve island 1 is improved. Furthermore, the transition fit between the sidewall 214 of the recessed portion 213 and the hole sidewall 1113 can further improve the coaxiality between the mating pipe section 21 and the first connecting hole 111, thereby improving the welding quality.

[0074] At least a portion of the solder portion 3 is filled between the recess 213 and the hole sidewall 1113. As some embodiments of this application, a portion of the solder portion 3 is filled between the recess 213 and the hole sidewall 1113, or all of the solder portion 3 is filled between the recess 213 and the hole sidewall 1113.

[0075] By making the surface of the protrusion 212 facing the hole sidewall 1113 arc-shaped, it is easier to assemble the mating pipe section 21 with the first connecting hole 111, improving the coaxiality of the mating pipe section 21 and the first connecting hole 111. Furthermore, by forming a recess 213 between two adjacent protrusions 212, the recess 213 extends radially along the connecting pipe 2 (i.e., Figures 2-4The clearance fit or transition fit between the sidewall 214 (shown in the Y direction) and the sidewall 1113 of the hole can improve the connection strength between the connecting pipe 2 and the valve island 1, and further improve the coaxiality between the fitting pipe section 21 and the first connecting hole 111, thereby improving the welding quality. By filling at least part of the solder part 3 between the recess 213 and the sidewall 1113 of the hole, it is convenient to weld the connecting pipe 2 and the connecting hole 11 together.

[0076] In some embodiments of this utility model, the protrusion 212 is constructed as an annular structure arranged circumferentially along the pipe body 211; or, the protrusion 212 is constructed as a plurality of arc structures spaced apart circumferentially along the pipe body 211.

[0077] In some embodiments of this application, the number of protrusions 212 may be one, and the protrusions 212 may be constructed as annular structures arranged circumferentially along the pipe body 211, that is, the protrusions 212 may be constructed as the aforementioned annular structures. In some embodiments of this application, the protrusions 212 may be constructed as multiple arc structures, and the multiple arc structures may be arranged at intervals circumferentially along the pipe body 211.

[0078] This arrangement increases the contact area between the protrusion 212 and the hole sidewall 1113, significantly improving the coaxiality of the mating pipe section 21 and the first connecting hole 111. It also ensures that the solder part 3 is evenly distributed in the gap between the pipe body 211 and the hole sidewall 1113, thereby improving the welding strength between the mating pipe section 21 and the first connecting hole 111. At the same time, it can reduce the processing difficulty.

[0079] In some embodiments of this utility model, such as Figure 4 As shown, along the axial direction of connecting pipe 2 (i.e. Figures 2-4 (in the X direction shown), a protrusion 212 is provided at one end of the connecting pipe 2 near the valve island 1. There are multiple protrusions 212. At least a portion of the protrusions 212 are completely provided inside the connecting hole 11. At least a portion of the protrusions 212 are spaced apart from the open end 1121. At least a portion of the solder portion 3 is provided between the end of the protrusion 212 near the open end 1121 and the open end 1121.

[0080] The protrusion 212 is provided at one end of the connecting pipe 2 near the valve island 1. For example, the protrusion 212 is provided on the mating pipe section 21.

[0081] At least a portion of the protrusions 212 are completely disposed within the connecting hole 11. As some embodiments of this application, some of the protrusions 212 are completely disposed within the connecting hole 11, or all of the protrusions 212 are completely disposed within the connecting hole 11.

[0082] At least one end of the protrusion 212 near the open end 1121 is spaced apart from the open end 1121, that is, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4 (in the X direction shown), at least part of the protrusion 212 is spaced apart from the open end 1112.

[0083] At least a portion of the solder portion 3 is disposed between the end of the protrusion 212 near the open end 1121 and the open end 1121. As some embodiments of this application, a portion of the solder portion 3 is disposed between the end of the protrusion 212 near the open end 1121 and the open end 1121, or all of the solder portion 3 is disposed between the end of the protrusion 212 near the open end 1121 and the open end 1121.

[0084] This arrangement facilitates the flow of the solder section 3 into the gap between the mating pipe section 21 and the first connecting hole 111 through the open end 1112, thereby improving the welding strength between the mating pipe section 21 and the first connecting hole 111, and thus improving the connection strength between the connecting pipe 2 and the valve island 1.

[0085] In some embodiments of this utility model, such as Figure 2 and Figure 3 As shown, the first connecting hole 111 includes a first sub-hole 1114 and a second sub-hole 1115. The second sub-hole 1115 communicates between the first sub-hole 1114 and the second connecting hole 112. The first hole sidewall 11141 of the first sub-hole 1114 and the second hole sidewall 11151 of the second sub-hole 1115 are jointly constructed as a hole sidewall 1113. The diameter of the second hole sidewall 11151 is smaller than the diameter of the first hole sidewall 11141. The mating pipe section 21 is interference-fitted with the second hole sidewall 11151 and has a gap with the first hole sidewall 11141. At least a portion of the solder part 3 is filled in the gap.

[0086] The second sub-hole 1115 connects the first sub-hole 1114 and the second connecting hole 112. As some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e....) Figures 2-4 (As shown in the X direction), the second sub-hole 1115 has two opposing ends, one end of which communicates with the first sub-hole 1114, and the other end of which communicates with the second connecting hole 112. In other words, the first sub-hole 1114, the second sub-hole 1115, and the second connecting hole 112 are connected along the axial direction of the connecting pipe 2 (i.e., along the X direction). Figures 2-4 The X-direction shown is arranged and connected sequentially.

[0087] The first hole sidewall 11141 of the first sub-hole 1114 and the second hole sidewall 11151 of the second sub-hole 1115 are jointly constructed as hole sidewall 1113. That is to say, hole sidewall 1113 may include the first hole sidewall 11141 of the first sub-hole 1114 and the second hole sidewall 11151 of the second sub-hole 1115.

[0088] The diameter of the second hole sidewall 11151 is smaller than the diameter of the first hole sidewall 11141. As some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4 In the X direction shown, the projections of the first hole sidewall 11141 and the second hole sidewall 11151 can both be constructed as circles with their centers coinciding. Furthermore, the projection of the first hole sidewall 11141 is overlaid on the projection of the second hole sidewall 11151.

[0089] The mating pipe section 21 is interference-fitted with the second hole sidewall 11151 and has a gap with the first hole sidewall 11141. At least a portion of the solder portion 3 is filled in the gap. As some embodiments of this application, the outer diameter of the mating pipe section 21 is slightly larger than the diameter of the second hole sidewall 11151, and the outer diameter of the mating pipe section 21 is smaller than the diameter of the first hole sidewall 11141. The mating pipe section 21 has a gap with the first hole sidewall 11141, and at least a portion of the solder portion 3 is filled in the gap.

[0090] By making the diameter of the second hole sidewall 11151 smaller than the diameter of the first hole sidewall 11141, the mating pipe section 21 is interference-fitted with the second hole sidewall 11151 and has a gap with the first hole sidewall 11141. At least part of the solder part 3 is filled in the gap, which not only improves the coaxiality of the mating pipe section 21 and the first connecting hole 111, but also makes the solder part 3 evenly distributed in the gap between the mating pipe section 21 and the first hole sidewall 11141, improving the welding quality and thus improving the connection strength between the connecting pipe 2 and the valve island 1.

[0091] In some embodiments of this utility model, such as Figure 2 As shown, the second bottom wall 11142 of the first sub-hole 1114 is axially (i.e., the connecting pipe 2) Figures 2-4 (The X direction shown is perpendicular to the X direction.)

[0092] In some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4 (As shown in the X direction), the second bottom wall 11142 of the first sub-hole 1114 is located at the end of the first sub-hole 1114 near the second sub-hole 1115. In other words, the second bottom wall 11142 of the first sub-hole 1114 is located at the connection between the first sub-hole 1114 and the second sub-hole 1115.

[0093] The second bottom wall 11142 of the first sub-hole 1114 is axially connected to the connecting pipe 2 (i.e., Figures 2-4 The X direction shown is perpendicular to the second bottom wall 11142, meaning that the second bottom wall 11142 is perpendicular to the axial direction of the connecting pipe 2 (i.e., the X direction is perpendicular to the X direction). Figures 2-4The included angle (in the X direction shown) is 90 degrees. As some embodiments of this application, the second bottom wall 11142 can be constructed as an annular bottom wall. The inner diameter of the second bottom wall 11142 is equal to the diameter of the second sub-hole 1115, and the outer diameter of the second bottom wall 11142 is equal to the diameter of the first sub-hole 1114. Furthermore, the second bottom wall 11142 is connected between the first hole sidewall 11141 and the second hole sidewall 11151.

[0094] This design simplifies the structure of the first connecting hole 111 and makes it easier to manufacture.

[0095] As some embodiments of this application, the first bottom wall 1111 of the first connecting hole 111 is located at one end of the first connecting hole 111 near the second connecting hole 112. Specifically, the first bottom wall 1111 is located at one end of the second sub-hole 1115 near the second connecting hole 112. As some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4 (As shown in the X direction), the first bottom wall 1111 and the second bottom wall 11142 are located at opposite ends of the second sub-hole 1115.

[0096] In some embodiments of this utility model, such as Figure 3 As shown, the second bottom wall 11142 of the first sub-hole 1114 is axially (i.e., the connecting pipe 2) Figures 2-4 The X direction shown has an angle, and the diameter of the second bottom wall 11142 gradually decreases from the first sub-hole 1114 to the second sub-hole 1115.

[0097] In some embodiments of this application, along the axial direction of the connecting pipe 2 (i.e. Figures 2-4 (As shown in the X direction), the second bottom wall 11142 of the first sub-hole 1114 is located at the end of the first sub-hole 1114 near the second sub-hole 1115. In other words, the second bottom wall 11142 of the first sub-hole 1114 is located at the connection between the first sub-hole 1114 and the second sub-hole 1115.

[0098] The second bottom wall 11142 of the first sub-hole 1114 is axially connected to the connecting pipe 2 (i.e., Figures 2-4 The second bottom wall 11142 has an angle with the X direction shown, and the diameter of the second bottom wall 11142 gradually decreases from the first sub-hole 1114 to the second sub-hole 1115. That is, from the first sub-hole 1114 to the second sub-hole 1115, the second bottom wall 11142 can be constructed as a conical surface arranged around the circumference of the connecting pipe 2. The inner diameter of the second bottom wall 11142 is equal to the diameter of the second sub-hole 1115, and the outer diameter of the second bottom wall 11142 is equal to the diameter of the first sub-hole 1114. Furthermore, the second bottom wall 11142 is connected between the first hole sidewall 11141 and the second hole sidewall 11151. As some embodiments of this application, the second bottom wall 11142 and the connecting pipe 2 are axially (i.e., Figures 2-4 The included angle (in the X direction shown) can be, but is not limited to, 30 degrees, 60 degrees, etc.

[0099] This design allows the second bottom wall 11142 to be constructed as a conical surface, which facilitates machining and also serves as a guide when the mating pipe section 21 is assembled with the first connecting hole 111, making it easier for the mating pipe section 21 to be quickly and accurately inserted into the second sub-hole 1115, thus improving assembly efficiency.

[0100] In some embodiments of this utility model, the mating pipe section 21 includes: a pipe body 211 and a protrusion 212. A portion of the outer wall of the pipe body 211 is provided with the protrusion 212, and the protrusion 212 is press-fitted with the side wall 11151 of the second hole; and / or, the protrusions 212 are a plurality of spaced-apart protrusions, and at least a portion of the solder portion 3 is disposed between two adjacent protrusions 212.

[0101] In this embodiment, a portion of the outer wall of the pipe body 211 is provided with a protrusion 212. As some embodiments of this application, the connection between the portion of the outer wall of the pipe body 211 and the protrusion 212 can be, but is not limited to, welding or integral molding. As some embodiments of this application, the portion of the outer wall of the pipe body 211 corresponding to the second hole sidewall 11151 is provided with a protrusion 212. The protrusion 212 and the second hole sidewall 11151 are press-fitted. As some embodiments of this application, the maximum outer diameter formed by the pipe body 211 and the protrusion 212 is slightly larger than the diameter of the second hole sidewall 11151, that is, the maximum outer diameter of the mating pipe section 21 is slightly larger than the diameter of the second hole sidewall 11151.

[0102] As some embodiments of this application, the number of protrusions 212 can be multiple, and the multiple protrusions 212 are evenly spaced along the circumference of the connecting pipe 2. As some embodiments of this application, the number of protrusions 212 can be one, and the protrusions 212 are constructed as an annular structure surrounding the pipe body 211.

[0103] By providing a protrusion 212 on part of the outer wall of the pipe body 211, and the protrusion 212 being interference-fitted with the side wall 11151 of the second hole, the coaxiality of the mating pipe section 21 and the first connecting hole 111 can be significantly improved, the solder part 3 can be evenly distributed, and the connection strength between the connecting pipe 2 and the valve island 1 can be improved.

[0104] In some embodiments of this application, multiple protrusions 212 are spaced apart, and at least some solder portions 3 are disposed between adjacent protrusions 212. In some embodiments of this application, multiple protrusions 212 are spaced apart circumferentially along the pipe body 211, and a solder portion 3 is disposed between each pair of adjacent protrusions 212. This arrangement can fully fill the solder portion 3, improve welding quality, and thus improve the connection strength between the connecting pipe 2 and the valve island 1.

[0105] As some embodiments of this application, such as Figures 5-7 As shown, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals; the protrusions 212 extend along the axial or circumferential direction of the pipe body 211.

[0106] In this embodiment, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals. In some embodiments of this application, a portion of the outer wall of the pipe body 211 is provided with protrusions 212, and the number of protrusions 212 is multiple, evenly spaced along the circumference of the connecting pipe 2. The number of protrusions 212 can be, but is not limited to, three, four, or five. In some embodiments of this application, there are four protrusions 212, which surround the pipe body 211 and are arranged at intervals.

[0107] The protrusions 212 extend axially or circumferentially along the pipe body 211. In some embodiments of this application, there are multiple protrusions 212, which surround the pipe body 211 and are arranged at intervals. Each protrusion 212 extends circumferentially along the pipe body 211. This arrangement allows for various arrangement forms of the protrusions 212, facilitating production according to actual needs.

[0108] This arrangement allows for a reasonable number and position of protrusions 212, facilitating processing. Furthermore, it ensures that each protrusion 212 is subjected to uniform stress, reducing the risk of stress concentration. Moreover, it significantly improves the coaxiality between the mating pipe section 21 and the first connecting hole 111.

[0109] As some embodiments of this application, such as Figure 5 As shown, the protrusion 212 is constructed as a spherical part.

[0110] Among them, the protrusion 212 is constructed as a spherical part. As some embodiments of this application, the protrusion 212 can be constructed as a hemisphere, and the surface of the protrusion 212 is a hemispherical surface.

[0111] This design further improves the coaxiality of the mating pipe section 21 and the first connecting hole 111, while facilitating the assembly of the mating pipe section 21 and the first connecting hole 111. In addition, it can reduce the processing difficulty of the connecting pipe 2.

[0112] As some embodiments of this application, such as Figure 6 and Figure 7 As shown, the surface of the protrusion 212 facing the sidewall 11151 of the second hole is constructed as an arc surface, and along the circumference of the connecting pipe 2, a recess 213 is formed between two adjacent protrusions 212, and the recess 213 is radially (i.e., along the connecting pipe 2) Figures 2-4 The sidewall 214 (shown in the Y direction) is clearance-fitted or transition-fitted with the second hole sidewall 11151, and at least a portion of the solder portion 3 is filled between the recess 213 and the second hole sidewall 11151.

[0113] The surface of the protrusion 212 facing the second hole sidewall 11151 is curved. In some embodiments of this application, the curvature of the curved surface is the same as the curvature of the second hole sidewall 11151, and the protrusion 212 and the second hole sidewall 11151 are interference fit.

[0114] Along the circumference of the connecting pipe 2, a recess 213 is formed between two adjacent protrusions 212. As some embodiments of this application, there can be multiple protrusions 212 and recesses 213. Multiple protrusions 212 are evenly spaced along the circumference of the connecting pipe 2, and multiple recesses 213 are evenly spaced sequentially along the circumference of the connecting pipe 2. Furthermore, a recess 213 is formed between every two protrusions 212, and similarly, a protrusion 212 is formed between every two recesses 213.

[0115] The recessed portion 213 is radially along the connecting pipe 2 (i.e. Figures 2-4 The sidewall 214 (shown in the Y direction) and the sidewall 11151 of the second hole have a clearance fit or transition fit. As some embodiments of this application, along the radial direction of the connecting pipe 2 (i.e., Figures 2-4 (As shown in the Y direction), the sidewall 214 of the recessed portion 213 is clearance-fitted with the sidewall 11151 of the second hole, that is, when the protrusion 212 and the sidewall 11151 of the second hole are interference-fitted, there is a gap between the sidewall 214 of the recessed portion 213 and the sidewall 11151 of the second hole. It should be noted that when welding the connecting pipe 2 and the valve island 1, at least a portion of the solder portion 3 can be distributed in the recessed portion 213 along the radial direction of the connecting pipe 2 (i.e., in the Y direction). Figures 2-4 The gap between the sidewall 214 (shown in the Y direction) and the second hole sidewall 11151 is used to improve the welding strength.

[0116] As some embodiments of this application, along the radial direction of the connecting pipe 2 (i.e. Figures 2-4(As shown in the Y direction), the sidewall 214 of the recess 213 transitions with the sidewall 11151 of the second hole. When welding the connecting pipe 2 and the valve island 1, at least a portion of the solder portion 3 can be distributed in the recess 213 along the radial direction of the connecting pipe 2 (i.e., Figures 2-4 In the gap between the side wall 214 (shown in the Y direction) and the second hole side wall 11151, the connection strength between the connecting pipe 2 and the valve island 1 is improved. Furthermore, the transition fit between the side wall 214 of the recessed portion 213 and the second hole side wall 11151 can further improve the coaxiality between the mating pipe section 21 and the first connecting hole 111, thereby improving the welding quality.

[0117] At least a portion of the solder portion 3 is filled between the recess 213 and the second hole sidewall 11151. As some embodiments of this application, a portion of the solder portion 3 is filled between the recess 213 and the second hole sidewall 11151, or all of the solder portion 3 is filled between the recess 213 and the second hole sidewall 11151.

[0118] By making the surface of the protrusion 212 facing the second hole sidewall 11151 arc-shaped, it is easier to assemble the mating pipe section 21 with the first connecting hole 111, improving the coaxiality of the mating pipe section 21 and the first connecting hole 111. Furthermore, by forming a recess 213 between two adjacent protrusions 212, the recess 213 extends radially along the connecting pipe 2 (i.e., Figures 2-4 The clearance fit or transition fit between the sidewall 214 (shown in the Y direction) and the sidewall 11151 of the second hole can improve the connection strength between the connecting pipe 2 and the valve island 1, and can further improve the coaxiality between the fitting pipe section 21 and the first connecting hole 111, thereby improving the welding quality. By filling at least part of the solder part 3 between the recess 213 and the sidewall 11151 of the second hole, it is convenient to weld the connecting pipe 2 and the connecting hole 11 together.

[0119] As some embodiments of this application, the protrusion 212 is constructed as an annular structure arranged circumferentially along the pipe body 211; or, the protrusion 212 is constructed as a plurality of arc structures spaced apart circumferentially along the pipe body 211.

[0120] In some embodiments of this application, the protrusion 212 is constructed as a ring structure arranged circumferentially along the tube body 211. In some embodiments of this application, the number of protrusions 212 can be one, and the protrusion 212 is constructed as a ring structure, that is, the protrusion 212 can be constructed as the above-mentioned ring structure.

[0121] As some embodiments of this application, the protrusion 212 is constructed as multiple arc structures, which are spaced apart circumferentially along the tube body 211.

[0122] This configuration increases the contact area between the protrusion 212 and the second hole sidewall 11151, significantly improving the coaxiality between the mating pipe section 21 and the first connecting hole 111. This allows the solder portion 3 to be evenly distributed in the gap between the pipe body 211 and the second hole sidewall 11151, thus fully welding the mating pipe section 21 and the first connecting hole 111. At the same time, it reduces the processing difficulty.

[0123] In some embodiments of this utility model, the valve island 1 is made of a material whose main component is a first metal, and the connecting pipe 2 is made of a material whose main component is a second metal. The potential difference between the first metal and the second metal is smaller than the potential difference between aluminum and copper.

[0124] Valve island 1 is made of a material whose main component is a first metal, and connecting pipe 2 is made of a material whose main component is a second metal. As some embodiments of this application, the first metal and the second metal can be constructed of the same material, or the first metal and the second metal can be constructed of different materials.

[0125] By making the potential difference between the first metal and the second metal smaller than the potential difference between aluminum and copper, the potential corrosion between valve island 1 and connecting pipe 2 can be reduced, which is beneficial to extending the service life of flow path unit 100.

[0126] In some embodiments of this utility model, the first metal is aluminum and the second metal is iron; or the first metal is iron and the second metal is iron.

[0127] This configuration allows the first metal and the second metal to be made of the same material or different materials, providing better selectivity. Furthermore, it can reduce the potential corrosion between the valve island 1 and the connecting pipe 2, which is beneficial for extending the service life of the flow path unit 100.

[0128] An air conditioner according to an embodiment of the present invention includes a housing and a flow path unit 100 disposed within the housing. The flow path unit 100 is the flow path unit 100 described in the above embodiment. By forming a connecting hole 11 in the valve island 1 and providing a mating pipe section 21 in the connecting hole 11, it is convenient to fill the circumferential solder portion 3 between the mating pipe section 21 and the connecting hole 11, which facilitates welding of the connecting pipe 2 and the valve island 1. Furthermore, by making a portion of the mating pipe section 21 interference fit with the connecting hole 11, the mating pipe section 21 and the connecting hole 11 can be arranged coaxially. When welding the connecting pipe 2 and the valve island 1, the solder portion 3 can be evenly distributed, improving the welding quality, thereby increasing the connection strength between the connecting pipe 2 and the valve island 1 and reducing the risk of the connecting pipe 2 and the valve island 1 breaking apart.

[0129] In some embodiments of this utility model, the air conditioner also includes a four-way valve 400 disposed in the housing. The four-way valve 400 includes a valve body and a plurality of connector pipes communicating with the valve body. At least one connector pipe is welded to the end of the connecting pipe 2 away from the valve island 1.

[0130] In this embodiment, at least one connector pipe is welded to the end of the connecting pipe 2 furthest from the valve island 1. In some embodiments of this application, one or more connector pipes are welded to the end of the connecting pipe 2 furthest from the valve island 1. In some embodiments of this application, one end of the connecting pipe 2 (i.e., the aforementioned mating pipe section 21) is welded to the valve island 1, and the other end of the connecting pipe 2 (i.e., the end of the connecting pipe 2 furthest from the valve island 1) is welded to the connector pipe.

[0131] This configuration allows the four-way valve 400 to be integrated into the valve island 1, facilitating the flow of refrigerant between the four-way valve 400 and the valve island 1, and enabling the switching between cooling and heating modes via the four-way valve 400.

[0132] In some embodiments of this utility model, the valve island 1 is made of at least one of aluminum, cast iron, and stainless steel; the connecting pipe 2 is a stainless steel pipe; the valve body and the connector pipe are made of copper; and the connector pipe is welded to the connecting pipe 2 using brazing material; or

[0133] The valve island 1 is made of at least one of aluminum, cast iron and stainless steel. The connecting pipe 2 is a stainless steel pipe. The valve body and the connector pipe are stainless steel parts. The air conditioner also includes an adapter pipe, which is a copper pipe. One end of the connector pipe is welded to the adapter pipe by brazing material, and the other end of the adapter pipe is welded to the connecting pipe 2 by brazing material.

[0134] In this embodiment, the valve island 1 is made of at least one of aluminum, cast iron, and stainless steel. As some embodiments of this application, the valve island 1 is made of one or more of aluminum, cast iron, and stainless steel. This arrangement allows the valve island 1 to be manufactured in various forms, facilitating selection based on actual rigidity requirements, economy, service life, and other needs. Furthermore, it reduces the risk of leakage from the valve island 1.

[0135] The connecting pipe 2 is made of stainless steel to improve its corrosion resistance and prevent it from being corroded by refrigerant, thus avoiding refrigerant leakage. In addition, stainless steel has good strength and rigidity, which can withstand the high pressure and potential hydraulic shock of the connecting pipe 2 during operation, resulting in good reliability. Using stainless steel can reduce long-term maintenance costs and extend the service life of the connecting pipe 2.

[0136] As some embodiments of this application, the valve body and connector pipe are made of copper to give them good chemical stability, corrosion resistance, and oxidation resistance, which can reduce long-term maintenance costs and increase the service life of the valve body and connector pipe. Furthermore, copper has good plasticity and machinability, facilitating the processing of the valve body and connector pipe. The connector pipe and connecting pipe 2 are welded together using brazing material. Brazing results in a smooth and flat weld joint with minimal changes in microstructure and mechanical properties, minimal deformation, and precise workpiece dimensions. Moreover, brazing equipment is simple, and production investment costs are low. Welding the connector pipe and connecting pipe 2 together facilitates the miniaturization design of air conditioners.

[0137] As some embodiments of this application, the valve body and connector pipe are made of stainless steel to improve their corrosion resistance, prevent refrigerant corrosion, and avoid refrigerant leakage. Stainless steel also has good strength and rigidity, enabling it to withstand higher pressures and potential hydraulic shocks during operation, resulting in high reliability. Using stainless steel can reduce long-term maintenance costs and extend the service life of the valve body and connector pipe.

[0138] The air conditioner also includes a copper pipe, which gives the pipe good chemical stability, corrosion resistance, and oxidation resistance. This reduces long-term maintenance costs and extends the service life of the pipe. In addition, copper has good plasticity and machinability, making it easy to process the pipe.

[0139] One end of the connector pipe is welded to the adapter pipe with brazing material, and the other end of the adapter pipe is welded to the connecting pipe 2 with brazing material. That is, the connector pipe and the connecting pipe 2 are connected through the adapter pipe. This arrangement allows for flexible changes in the direction of the connector pipe and the connecting pipe 2, making the orientation of the connector pipe and the connecting pipe 2 variable and facilitating flexible arrangement of the connector pipe and the connecting pipe.

[0140] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0141] In the description of this utility model, "first feature" and "second feature" may include one or more of the features.

[0142] In the description of this utility model, "multiple" means two or more.

[0143] In the description of this utility model, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0144] In the description of this utility model, the terms "above", "over" and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0145] 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.

[0146] 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 the valve island has a refrigerant flow channel and a connecting hole communicating with the refrigerant flow channel; A connecting pipe, the connecting pipe including a mating pipe section, the mating pipe section being disposed in the connecting hole, and a portion of the mating pipe section being interference-fitted with the connecting hole; A solder section is provided between the connecting hole and the connecting pipe, and the connecting hole and the connecting pipe are welded together through the solder section.

2. The flow path unit according to claim 1, characterized in that, The connecting hole includes: a first connecting hole and a second connecting hole, the second connecting hole communicating with the first connecting hole, the end of the first connecting hole facing away from the second connecting hole being constructed as an open end, the mating pipe section being disposed in the first connecting hole and contacting the first bottom wall of the first connecting hole, and a portion of the mating pipe section being interference-fitted with the side wall of the first connecting hole.

3. The flow path unit according to claim 2, characterized in that, The mating pipe section includes: a pipe body and a protrusion. The protrusion is provided on a portion of the outer wall of the pipe body. The protrusion is disposed in the connecting hole and is press-fitted with the side wall of the hole. There is a gap between the pipe body and the side wall of the hole, and at least a portion of the solder portion fills the gap.

4. The flow path unit according to claim 3, characterized in that, The protrusions are multiple, and the multiple protrusions surround the tube body and are arranged at intervals; the protrusions extend along the axial or circumferential direction of the tube body.

5. The flow path unit according to claim 3 or 4, characterized in that, The protrusion is constructed as a spherical portion.

6. The flow path unit according to claim 3 or 4, characterized in that, The surface of the protrusion facing the sidewall of the hole is arc-shaped, and a recess is formed between two adjacent protrusions along the circumference of the connecting pipe. The recess is in clearance fit or transition fit with the sidewall of the hole along the radial direction of the connecting pipe, and at least part of the solder portion is filled between the recess and the sidewall of the hole.

7. The flow path unit according to claim 3, characterized in that, The protrusion is constructed as a ring-shaped structure arranged circumferentially along the tube body; or, the protrusion is constructed as a plurality of arc-shaped structures spaced apart circumferentially along the tube body.

8. The flow path unit according to claim 3 or 4, characterized in that, Along the axial direction of the connecting pipe, the protrusion is disposed at one end of the connecting pipe near the valve island. There are multiple protrusions, at least a portion of which are completely disposed within the connecting hole. At least a portion of the protrusion is spaced apart from the open end at one end near the open end. At least a portion of the solder portion is disposed between the protrusion and the open end at one end near the open end.

9. The flow path unit according to claim 2, characterized in that, The first connecting hole includes a first sub-hole and a second sub-hole. The second sub-hole communicates between the first sub-hole and the second connecting hole. The first hole sidewall of the first sub-hole and the second hole sidewall of the second sub-hole are jointly constructed as the hole sidewall. The diameter of the second hole sidewall is smaller than the diameter of the first hole sidewall. The mating pipe section is interference-fitted with the second hole sidewall and has a gap with the first hole sidewall. At least a portion of the solder portion fills the gap.

10. The flow path unit according to claim 9, characterized in that, The second bottom wall of the first sub-hole is perpendicular to the axis of the connecting pipe.

11. The flow path unit according to claim 9, characterized in that, The second bottom wall of the first sub-hole has an angle with the axial direction of the connecting pipe, and the diameter of the second bottom wall gradually decreases from the first sub-hole to the second sub-hole.

12. The flow path unit according to claim 9, characterized in that, The mating pipe section includes: a pipe body and a protrusion, wherein a portion of the outer wall of the pipe body is provided with the protrusion, and the protrusion is interference-fitted with the side wall of the second hole; and / or, the protrusion is a plurality of spaced protrusions, and at least a portion of the solder portion is disposed between two adjacent protrusions.

13. The flow path unit according to any one of claims 1-4, 7, and 9-12, characterized in that, The valve island is made of a material whose main component is a first metal, and the connecting pipe is made of a material whose main component is a second metal. The potential difference between the first metal and the second metal is less than the potential difference between aluminum and copper.

14. The flow path unit according to claim 13, characterized in that, The first metal is aluminum, and the second metal is iron; or The first metal is iron, and the second metal is iron.

15. An air conditioner, characterized in that, include: The housing and the flow path unit disposed within the housing include any one of claims 1-14.

16. The air conditioner according to claim 15, characterized in that, The air conditioner also includes a four-way valve disposed in the housing. The four-way valve includes a valve body and a plurality of connector pipes communicating with the valve body. At least one of the connector pipes is welded to the end of the connecting pipe away from the valve island.

17. The air conditioner according to claim 16, characterized in that, The valve island is made of at least one of aluminum, cast iron, and stainless steel; the connecting pipe is a stainless steel pipe; the valve body and the connector pipe are made of copper; and the connector pipe is welded to the connecting pipe using brazing material. The valve island is made of at least one of aluminum, cast iron, and stainless steel. The connecting pipe is a stainless steel pipe. The valve body and the connector pipe are stainless steel components. The air conditioner also includes an adapter pipe, which is a copper pipe. One end of the connector pipe is welded to the adapter pipe using brazing material, and the other end of the adapter pipe is welded to the connecting pipe using brazing material.

Images