A valve device and its manufacturing method

Abstract

The valve assembly's connector and valve seat are welded together. The first and second welding surfaces are at an angle to the axial direction of the valve assembly, meaning both are inclined. The first and second welding surfaces are welded together. With the axial dimension of the welding surfaces remaining constant, compared to a design where the first and second welding surfaces extend axially, the inclined arrangement increases the welding area, thus improving weld strength. During the insertion of the connector into the valve seat's mounting hole, the valve seat and connector are guided by the inclined second welding surface, facilitating connector insertion. Because the first and second welding surfaces are at an angle to the axial direction of the valve assembly, the fit between them during connector insertion determines the insertion depth, reducing the risk of excessive weld seams due to incomplete connector insertion.

Description

Technical Field

[0001] This application relates to the field of thermal management technology, specifically to a valve device for vehicles. Background Technology

[0002] In the field of thermal management technology, valve devices are commonly used as throttling elements. A valve device includes a housing and a valve core assembly, with the valve core assembly movably disposed within the housing. The housing includes a valve body, a valve seat, a connector, and a sleeve. The valve body is connected to the valve seat, and the valve seat is connected to the sleeve via the connector. In practical applications, the connector and valve seat are often connected by welding. Improving the welding quality of the valve seat and connector has always been a key research focus for those skilled in the art. Summary of the Invention

[0003] One objective of this application is to provide a valve device that improves the welding quality of the connectors and valve seat.

[0004] To achieve the above objectives, this application adopts the following technical solution: a valve device, including a housing, the housing including a connector and a valve seat, the connector being welded to the valve seat; the connector including a first welding surface, the valve seat including a second welding surface; the valve seat having a mounting hole, a portion of the connector engaging with the mounting hole to form a wall of the mounting hole including the second welding surface; the extension direction of the centerline of the mounting hole is defined as the axial direction of the valve device, the first welding surface and the axial direction of the valve device are at an angle, the second welding surface and the axial direction of the valve device are at an angle, the direction perpendicular to the centerline of the mounting hole is defined as radial, the second welding surface and the radial direction are also at an angle, the first welding surface and the second welding surface engage, the first welding surface and the second welding surface are welded, and at least a portion of the solder is located between the first welding surface and the second welding surface.

[0005] A method for manufacturing a valve device is also provided, comprising: inserting a portion of a connector into a valve seat such that a first welding surface mates with a second welding surface, wherein both the first welding surface and the second welding surface have an angle with the axial direction of the valve device; and brazing the first welding surface and the second welding surface together.

[0006] In the technical solution of the valve device in this application, the outer shell of the valve device includes a connector and a valve seat. The connector and the valve seat are welded together. The connector includes a first welding surface, and the valve seat includes a second welding surface. The first and second welding surfaces are at an angle to the axial direction of the valve device, that is, both the first and second welding surfaces are inclined. The first and second welding surfaces are welded together. With the axial dimension of the welding surfaces unchanged, compared with the scheme where the first and second welding surfaces extend along the axial direction, the inclined setting of the first and second welding surfaces can increase the area of ​​the welding surfaces, which is beneficial to improving the welding strength. During the process of pressing the connector into the mounting hole of the valve seat, the valve seat and the connector are guided by the inclined second welding surface, which facilitates the insertion of the connector. Since the first and second welding surfaces are at an angle to the axial direction of the valve device, the cooperation of the first and second welding surfaces during the insertion of the connector can determine the insertion depth of the connector, which helps to reduce the problem of excessive weld seam between the first and second welding surfaces due to incomplete insertion of the connector, and is beneficial to improving the welding quality.

[0007] In the technical solution of the processing method of this application, a portion of the connector is inserted into the valve seat and then brazed. The operation is simple. Furthermore, the first and second welding surfaces are at an angle to the axial direction of the valve device, that is, both the first and second welding surfaces are inclined. The first and second welding surfaces mate and are welded together. With the axial dimension of the welding surfaces unchanged, compared with the scheme where the first and second welding surfaces extend along the axial direction, the inclined setting of the first and second welding surfaces can increase the area of ​​the welding surface, which is beneficial to improving the welding strength. During the process of pressing the connector into the mounting hole of the valve seat, the valve seat and the connector are guided by the inclined second welding surface, which facilitates the insertion of the connector. Since the first and second welding surfaces are at an angle to the axial direction of the valve device, the mating of the first and second welding surfaces during the insertion of the connector can determine the insertion depth of the connector, which helps to reduce the problem of excessive weld seam between the first and second welding surfaces due to incomplete insertion of the connector, and is beneficial to improving the welding quality.

[0008] A valve device includes a housing, characterized in that the housing includes a connector and a valve seat, the connector being welded to the valve seat; the connector includes a first welded wall, and the valve seat includes a second welded wall; the valve seat has a mounting hole, a portion of the connector engaging with a wall forming the mounting hole, the wall forming the mounting hole including the second welded wall; the extension direction of the centerline of the mounting hole is defined as the axial direction of the valve device, the first welded wall and the axial direction of the valve device are at an angle, the second welded wall and the axial direction of the valve device are at an angle, a direction perpendicular to the centerline of the mounting hole is defined as radial, the second welded wall also being at an angle to the radial direction, the first welded wall and the second welded wall engaging, the first welded wall and the second welded wall being welded, and at least a portion of the solder being located between the first welded wall and the second welded wall.

[0009] In the technical solution of the valve device of this application, the outer shell of the valve device includes a connector and a valve seat. The connector and the valve seat are welded together. The connector includes a first welded wall, and the valve seat includes a second welded wall. The first and second welded walls are at an angle to the axial direction of the valve device, that is, both the first and second welded walls are inclined. The first and second welded walls are welded together. With the axial dimension of the welded walls unchanged, compared with the scheme where the first and second welded walls extend along the axial direction, the inclined arrangement of the first and second welded walls can increase the area of ​​the welded walls, which is beneficial to improving the weld strength. During the process of pressing the connector into the mounting hole of the valve seat, the valve seat and the connector are guided by the inclined second welded wall, which facilitates the insertion of the connector. Since the first and second welded walls are at an angle to the axial direction of the valve device, the cooperation of the first and second welded walls during the insertion of the connector can determine the insertion depth of the connector, which helps to reduce the problem of excessive weld seam between the first and second welded walls due to incomplete insertion of the connector, and is beneficial to improving the welding quality. Attached Figure Description

[0010] Figure 1 A cross-sectional schematic diagram of one embodiment of the valve device is shown.

[0011] Figure 2 It shows Figure 1 The diagram shows an exploded structural schematic of one embodiment of the outer casing.

[0012] Figure 3 It shows Figure 2 The diagram shows a cross-sectional view of one embodiment of the housing.

[0013] Figure 4 It shows Figure 1 A cross-sectional schematic diagram of one embodiment of the connector and valve seat shown;

[0014] Figure 5 It shows Figure 4 A partial enlarged view of one embodiment of the connector and valve seat shown.

[0015] Figure 6 It shows Figure 1 A cross-sectional view of the connector and valve seat before welding.

[0016] Figure 7 It shows Figure 1 A schematic diagram of one embodiment of the valve seat at an angle;

[0017] Figure 8 It shows Figure 6 A cross-sectional schematic diagram of one embodiment of the valve seat shown;

[0018] Figure 9 It shows Figure 1 A schematic diagram of one embodiment of the connector shown at an angle;

[0019] Figure 10 It shows Figure 8 A cross-sectional structural schematic diagram of one embodiment of the connector shown;

[0020] Figure 11 It shows Figure 4 A partially enlarged view of another embodiment of the connector and valve seat shown.

[0021] 1000, Valve assembly; 100, Housing; 200, Valve core assembly; 1, Connector; 2, Valve seat; 11, First welding surface / first welding wall; 21, Second welding surface / second welding wall; 12, Main body; 3, Weld ring; 121, First connecting surface; 13, First chamfer; 14, First limiting surface; 15, Insertion part; 151, Outer peripheral wall; 16, Third chamfer; 22, Second limiting surface; 24, Protruding rib; 23, Second connecting surface; 25, Second chamfer; 26, Mounting hole; 4, Annular groove; 261, Mating surface; 5, Sleeve; 27, Stepped part. Detailed Implementation

[0022] The embodiments are described in detail below with reference to the accompanying drawings.

[0023] To make the objectives, technical solutions, and advantages of this application clearer, embodiments of this application are described below with reference to the accompanying drawings. In this document, relational terms such as "first" and "second" are used merely to distinguish one component from another with the same name, and do not necessarily require or imply any such actual relationship or order between these components. It should be noted that the connections in this application include fixed connections and limiting connections. "Limiting connections" in this application include hinges, snap-fit ​​connections, etc., while "fixed connections" include welding, bonding, vulcanization fixing, riveting, insert injection molding, etc.

[0024] like Figures 1-3 As shown, in the field of thermal management technology, a valve device 1000 is commonly used as a throttling element. The valve device 1000 includes a housing 100 and a valve core assembly 200. The valve core assembly 200 is movably disposed within the housing 100. The housing 100 includes a valve body, a valve seat 2, a connecting member 1, and a sleeve 5. The valve body is connected to the valve seat 2, and the valve seat 2 is connected to the sleeve 5 via the connecting member 1. At least a portion of the valve core assembly 200 is located within the valve seat 2. In the closed state, the valve core assembly 200 and the valve seat 2 can contact and seal. In the open state, the valve device 1000 has a high flow rate state and a low flow rate state. In the high flow rate state, the valve core assembly 200 and the valve seat 2 can be separated; in the low flow rate state, the valve core assembly 200 and the valve seat 2 maintain contact and seal. The valve core assembly 200 has a flow channel inside.

[0025] like Figure 4 As shown, in a valve device 1000, the connector 1 is welded to the valve seat 2, which provides a good seal between the connector 1 and the valve seat 2. However, during the installation of the connector 1 and the valve seat 2, the connector 1 and the valve seat 2 are often assembled first and then welded together. When assembling the connector 1 and the valve seat 2 into one piece, a press-fitting method is often used for connection.

[0026] like Figure 4As shown, to improve the welding quality between the connector 1 and the valve seat 2, the connector 1 in this solution includes a first welding surface 11, and the valve seat 2 includes a second welding surface 21. A portion of the connector 1 mates with the mounting hole 26, forming the wall of the mounting hole 26, which includes the second welding surface 21. The extension direction of the centerline of the mounting hole 26 is defined as the axial direction of the valve device 1000. The first welding surface 11 and the axial direction of the valve device 1000 are at an angle, and the second welding surface 21 and the axial direction of the valve device 1000 are also at an angle. The direction perpendicular to the centerline of the mounting hole 26 is defined as the radial direction, and the second welding surface 21 also has an angle with the radial direction. That is, both the first welding surface 11 and the second welding surface 21 are inclined. The first welding surface 11 and the second welding surface 21 mate, and the first welding surface 11 is welded to the second welding surface 21. With the axial dimension of the welding surface unchanged, compared with the first welding surface 11 and the second welding surface 21, the welding quality of the first welding surface 11 is improved. The axial extension of the welding surface 21, along with the inclined arrangement of the first welding surface 11 and the second welding surface 21, increases the area of ​​the welding surface, which is beneficial to improving the welding strength. It is worth noting that the first welding surface 11 and the second welding surface 21 can be inclined conical surfaces or inclined arc surfaces, etc. During the process of pressing the connector 1 into the mounting hole 26 of the valve seat 2, the valve seat 2 and the connector 1 are guided by the inclined second welding surface 21, which facilitates the insertion of the connector 1. Since there is an angle between the first welding surface 11 and the second welding surface 21 and the axial direction of the valve device 1000, the cooperation of the first welding surface 11 and the second welding surface 21 during the insertion of the connector 1 can determine the insertion depth of the connector 1. This helps to reduce the problem of excessive weld between the first welding surface 11 and the second welding surface 21 due to incomplete insertion of the connector 1, and thus improves the welding quality. It is worth noting that solder refers to the general term for metal or alloy materials that fill the weld; the first welding surface 11 and the second welding surface 21 are matched, including technical solutions in which the first welding surface 11 and the second welding surface 21 are parallel to each other, as well as technical solutions in which the two are complementary, so that the width of the weld gap formed after the first welding surface 11 and the second welding surface 21 are matched is more uniform, which in turn helps to fill the solder more evenly.

[0027] In one technical solution of this application, the angle between the first welding surface 11 and the axial direction of the valve device 1000 is less than or equal to 45°, and the angle between the second welding surface 21 and the axial direction of the valve device 1000 is less than or equal to 45°. The inventors have found that the smaller the angle between the welding surface and the axial direction, the better the effect on solder guidance. The length of the first welding surface 11 in the extension direction is less than or equal to 1.5mm, which is beneficial for the solder to more fully cover the first welding surface 11.

[0028] like Figures 4-6As shown, in another technical solution of this application, the connector 1 includes a main body 12. Along the axial direction of the valve device 1000, the main body 12 is away from the mounting hole 26 relative to the first welding surface 11. The outer side wall of the main body 12 can be used to fit the welding ring 3. The outer side wall of the main body 12 includes a first connecting surface 121. Along the axial direction of the valve device 1000, the length of the first connecting surface 121 is preferably less than or equal to 1.2 mm. The first connecting surface 121 has sufficient length to fit the welding ring 3 and will not occupy too much axial dimension, making the axial length of the connector relatively short. During the welding process, solder accumulates on the first connecting surface 121 and the valve seat 2. The first connecting surface 121 and the first welding surface 11 are connected by a first chamfer 13. The chamfer facilitates smoother solder flow on the outer wall of the connector 1, allowing solder to flow from the first connecting surface 121 into the first welding surface 11. Due to solder accumulation, the distance between the first chamfer 13 and the valve seat 2 is greater than the distance between the first welding surface 11 and the second welding surface 21, which helps guide solder to flow between the first chamfer 13 and the valve seat 2, increasing the amount of solder flowing between the first welding surface 11 and the second welding surface 21, thus enhancing the welding strength. Preferably, the first chamfer 13 is an arc with a radius greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

[0029] like Figures 4-10 As shown, the connector 1 includes a first limiting surface 14, which is connected to a first connecting surface 121. The first limiting surface 14 is away from the first welding part relative to the main body 12, and faces the valve seat 2. The first limiting surface 14 and the valve seat 2 are spaced apart, and an annular groove 4 is formed between the first limiting surface 14 and the valve seat 2. The annular groove 4 surrounds the main body 12. Figure 5 As shown, during welding, the annular groove 4 can be used to accommodate the welding ring 3. The wall of the annular groove 4 plays a limiting role for the welding ring 3, which helps to fix the position of the welding ring 3 and reduces the risk of poor welding quality due to the skewness of the welding ring 3.

[0030] Furthermore, such as Figures 4-10 As shown, the first limiting surface 14 and the first connecting surface 121 are arranged along the axial direction. The first limiting surface 14 and the axial direction of the valve device 1000 are at an angle. The angle between the first limiting surface 14 and the axial direction of the valve device 1000 is less than or equal to 45°. During the research process, the inventors found that the prior art usually uses a welding groove to accommodate the welding ring 3. The welding groove is often too deep, which not only makes it inconvenient to perform welding operations, but also makes it difficult to observe the weld condition. When there are problems with the welding, they cannot be detected in time, which leads to subsequent leakage at the weld. In this solution, the welding ring 3 is located in the annular groove 4, and the first limiting surface 14 is set at an angle. The first limiting surface 14 is not only used to limit the position of the welding ring 3 in the axial direction to facilitate the welding operation, but also the angled setting makes it easy for the processing personnel to observe the weld condition from the outside.

[0031] like Figures 4-8 As shown, the valve seat 2 includes a second limiting surface 22, which is part of the wall forming the annular groove 4. Before welding, the first limiting surface 14 and the second limiting surface 22 are located on both sides of the welding ring 3 along the axial direction, which more stably limits the position of the welding ring 3, which helps to reduce the risk of the welding ring 3 being skewed, and helps to improve the welding quality and welding convenience. The second limiting surface 22 is connected to the second welding surface 21 by a second chamfer 25. The second chamfer 25 is an arc. The first chamfer 13 is designed on the connector 1, and the second chamfer 25 is designed on the valve seat 2. The two chamfers help to guide the solder into the gap between the first welding surface 11 and the second welding surface 21, which helps to improve the welding strength. Preferably, the radius of the second chamfer 25 is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

[0032] like Figures 4-8 As shown, the valve seat 2 includes a convex rib 24, the wall of which is part of the wall forming the annular groove 4. The convex rib 24 extends outward from the second limiting surface 22, which helps to reduce the risk of solder overflowing from the annular groove 4 and improves the welding quality. A chamfer is added between the wall of the convex rib 24 and the second limiting surface 22, which helps to increase the connection strength between the convex rib 24 and the second limiting surface 22. The chamfered wall includes a second connecting surface 23, that is, the valve seat 2 includes a second connecting surface 23, which connects the convex annular portion and the second limiting surface 22. The second connecting surface 23 is part of the wall forming the annular groove 4. Preferably, the angle between the second connecting surface 23 and the axial direction of the valve device 1000 is less than or equal to 45°.

[0033] like Figures 4-6 As shown, in another technical solution of this invention, the wall forming the mounting hole 26 includes a mating surface 261. The mating surface 261 and the second welding surface 21 are arranged axially and connected. The radial dimension of the second welding surface 21 gradually increases from the mating surface 261 away from it. The solder can flow between the mating surface 261 and the wall of the connector 1 through the guidance of the first welding surface 11 and the second welding surface 21, which helps to increase the area for solder welding and improves the durability and stress resistance of the weld joint. Furthermore, the mating surface 261 has an interference fit or a transition fit with the connector 1, which serves to fix the valve seat 2 and the connector 1 before welding, facilitating subsequent processing.

[0034] like Figure 11As shown, the connector 1 includes a main body 12, which is located axially along the valve device 1000. The main body 12 is located away from the mounting hole 26 relative to the first welding surface 11. The connector 1 includes an insertion part 15, which is located away from the main body 12 relative to the first welding surface 11. The outer peripheral wall 151 of the insertion part 15 extends axially along the valve device 1000. The outer peripheral wall 151 is press-fitted or transition-fitted with the mating surface 261. The insertion part 15 has a third chamfer 16, which is located away from the first welding surface 11 relative to the outer peripheral wall 151. When the connector 1 is inserted into the mounting hole 26 of the valve seat 2, the third chamfer 16 can play a guiding role, which helps to reduce the difficulty of inserting the connector 1. The valve seat 2 includes a stepped part 27, which is located away from the second welding surface 21 relative to the mating surface 261. Along the axial direction of the valve device 1000, at least a portion of the stepped part 27 faces the connector 1. The stepped part 27 abuts or has a clearance fit with the connector 1. When the connector 1 is inserted into the mounting hole 26 of the valve seat 2, it can be confirmed whether the connector 1 is inserted in place by directly abutting the step portion 27 with the connector 1. When the step portion 27 directly abuts the connector 1, there is a gap between the first welding surface 11 and the second welding surface 21 for the solder to flow in.

[0035] Currently, such as Figures 1-10 The valve device 1000 is primarily made of stainless steel, which has excellent wear resistance and pressure resistance. However, stainless steel is relatively heavy. During the research process, the inventors discovered that to reduce the overall weight of the valve device 1000, the material of the valve device 1000 could be changed. Considering the pressure resistance and wear resistance of the valve device 1000, the inventors designed the connecting part 1 to be made of stainless steel, and the valve seat 2 to be made of aluminum alloy. Aluminum alloy can significantly reduce the weight of the valve device 1000, and the wear resistance of the aluminum alloy valve body can be increased through oxidation. The inventors also designed the structure of the stainless steel connecting part 1, reducing its weight by reducing the thickness of the convex rib 24, thereby achieving a weight reduction effect.

[0036] A method for manufacturing a valve device 1000 includes: inserting a portion of a connector 1 into a valve seat 2 such that a first welding surface 11 mates with a second welding surface 21, wherein both the first welding surface 11 and the second welding surface 21 have an angle with the axial direction of the valve device 1000, and the connector 1 and the valve seat 2 are made of dissimilar metals; and brazing the first welding surface 11 and the second welding surface 21 together. The connector 1 and the valve seat 2 are dissimilar metals. After inserting a portion of the connector 1 into the valve seat 2, brazing is performed. The operation is simple. Furthermore, the first welding surface 11 and the second welding surface 21 are at an angle to the axial direction of the valve device 1000, that is, both the first welding surface 11 and the second welding surface 21 are inclined. The first welding surface 11 and the second welding surface 21 cooperate. The step "inserting a portion of the connector (1) into the valve seat 2 so that the first welding surface 11 cooperates with the second welding surface 21" includes: inserting a portion of the connector 1 into the mounting hole 26 along the axial direction of the mounting hole 26 so that a portion of the first welding surface 11 abuts against the second welding surface 21. The first welding surface 11 and the second welding surface 21 are welded together. During the process of pressing the connector 1 into the valve seat 2... During the process, the valve seat 2 and the connecting part 1 are limited by the inclined first welding surface 11 and the second welding surface 21, which helps to reduce the risk of the connecting part 1 becoming skewed when pressed into the valve seat 2 and avoids affecting the welding. The solder generated during welding will flow into the valve device 1000 along the first welding surface 11 and the second welding surface 21. The inclined surfaces can guide the solder, which helps the solder to fill the welding gap evenly and improves the welding quality. Furthermore, with the valve seat 2 thickness unchanged, compared with the scheme where the first welding surface 11 and the second welding surface 21 extend axially, the inclined arrangement of the first welding surface 11 and the second welding surface 21 can increase the area of ​​the welding surface and improve the welding strength.

[0037] Before the step of "inserting the connector 1 into the valve seat 2", the manufacturing method of the valve device 1000 includes: assembling the connector 1 and the welding ring 3 to make the welding ring 3 limit or fix the connector 1. First connecting the welding ring 3 to the connector 1 as a whole, and then assembling it with the valve seat 2, compared to the method of first placing the welding ring 3 inside the valve seat 2 and then assembling it with the connector 1, connecting the welding ring 3 to the connector 1 as a whole allows for simpler control of the installation position of the welding ring 3, more precise installation of the welding ring 3, avoids the positioning deviation problem caused by installing the welding ring 3 alone, and is beneficial to improving welding quality.

[0038] The connector 1 includes a main body 12 and a first limiting surface 14. The step of "assembling the connector 1 and the welding ring 3" includes: firstly, putting the welding ring 3 onto the main body 12 so that the welding ring 3 abuts against the first limiting surface 14; by setting the first limiting surface 14, the welding ring 3 is limited in the axial direction. During the installation of the welding ring 3, it is only necessary to put the welding ring 3 onto the main body 12 until it abuts against the first limiting surface 14 to complete the installation of the welding ring 3. This facilitates the installation of the welding ring 3. In mass production, the positioning of the welding ring 3 is more accurate, avoiding the problem of poor welding quality due to the positioning error of the welding ring 3.

[0039] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still make modifications or equivalent substitutions to the present invention. All technical solutions and improvements that do not depart from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A valve device (1000), comprising a housing (100), characterized in that, The housing (100) includes a connector (1) and a valve seat (2), the connector (1) being welded to the valve seat (2); the connector (1) includes a first welding surface (11), and the valve seat (2) includes a second welding surface (21); the valve seat (2) has a mounting hole (26), a portion of the connector (1) engaging with a wall forming the mounting hole (26), the wall forming the mounting hole (26) including the second welding surface (21); the extension direction of the centerline of the mounting hole (26) is defined as the axial direction of the valve device (1000), the first... A welding surface (11) has an angle with the axial direction of the valve device (1000), and a second welding surface (21) has an angle with the axial direction of the valve device (1000). The direction perpendicular to the center line of the mounting hole (26) is defined as radial. The second welding surface (21) also has an angle with the radial direction. The first welding surface (11) and the second welding surface (21) are fitted together. The first welding surface (11) and the second welding surface (21) are welded together. At least part of the solder is located between the first welding surface (11) and the second welding surface (21).

2. The valve device according to claim 1, characterized in that, The angle between the first welding surface (11) and the axial direction of the valve device (1000) is less than or equal to 45°, and the angle between the second welding surface (21) and the axial direction of the valve device (1000) is less than or equal to 45°.

3. The valve device according to claim 1, characterized in that, The connector (1) includes a main body (12) along the axial direction of the valve device (1000). The main body (12) is located away from the mounting hole (26) relative to the first welding surface. The outer side wall of the main body (12) includes a first connecting surface (121). The first connecting surface (121) is connected to the first welding surface (11) by a first chamfer (13). The distance between the first chamfer (13) and the valve seat (2) is greater than the distance between the first welding surface (11) and the second welding surface (21).

4. The valve device according to claim 1, characterized in that, The length of the first welding surface (11) in the extension direction is less than or equal to 1.5 mm.

5. The valve device according to claim 3, characterized in that, Along the axial direction of the valve device (1000), the length of the first connecting surface (121) is less than or equal to 1.2 mm.

6. The valve device according to claim 3, characterized in that, The first chamfer (13) is an arc, and the radius of the arc of the first chamfer (13) is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

7. The valve device according to claim 3, characterized in that, The connector (1) includes a first limiting surface (14), which is connected to the first connecting surface (121). The first limiting surface (14) is away from the first welding part relative to the main body (12). The first limiting surface (14) faces the valve seat (2). The first limiting surface (14) and the valve seat (2) are spaced apart. An annular groove (4) is formed between the first limiting surface (14) and the valve seat (2). The annular groove (4) surrounds the main body (12) and can be used to accommodate the welding ring (3).

8. The valve device according to claim 7, characterized in that, The first limiting surface (14) and the first connecting surface (121) are arranged along the axial direction. The first limiting surface (14) and the axial direction of the valve device (1000) are at an angle. The angle between the first limiting surface (14) and the axial direction of the valve device (1000) is less than or equal to 45°.

9. The valve device according to claim 7, characterized in that, The valve seat (2) includes a second limiting surface (22), which is part of the wall forming the annular groove (4). The second limiting surface (22) and the second welding surface (21) are connected by a second chamfer (25). The second chamfer (25) is an arc and the radius of the second chamfer (25) is greater than or equal to 0.2 mm and less than or equal to 0.5 mm.

10. The valve device according to claim 9, characterized in that, The valve seat (2) includes a second connecting surface (23) that extends outward from the second limiting surface (22). The valve seat includes a convex rib (24) that protrudes relative to the second connecting surface (23) and surrounds the annular groove (4). The second connecting surface (23) connects the convex annular portion (24) and the second limiting surface (22). The second connecting surface (23) is part of the wall forming the annular groove (4).

11. The valve device according to any one of claims 1-10, characterized in that, The wall forming the mounting hole (26) includes a mating surface (261) that extends axially from the second welding surface (21). The mating surface (261) and the second welding surface (21) are arranged axially. The radial dimension of the second welding surface (21) gradually increases from the mating surface (261) away from the mating surface (261). The mating surface (261) and the connector (1) are in an interference fit or a transition fit.

12. The valve device according to claim 11, characterized in that, The connector (1) includes a main body (12) along the axial direction of the valve device (1000), the main body (12) being located away from the mounting hole (26) relative to the first welding surface (11). The connector (1) includes an insertion part (15) located away from the main body (12) relative to the first welding surface (11). The outer peripheral wall (151) of the insertion part (15) extends along the axial direction of the valve device (1000), and the outer peripheral wall (151) is press-fitted with the mating surface (261). Or transition fit; the insertion part (15) has a third chamfer (16), the third chamfer (16) being away from the first welding surface (11) relative to the outer peripheral wall (151); the valve seat (2) includes a stepped part (27), the stepped part (27) being away from the second welding surface (21) relative to the mating surface (261), along the axial direction of the valve device (1000), at least a portion of the stepped part (27) facing the connector (1), the stepped part (27) abutting or clearance fit with the connector (1).

13. The valve device according to any one of claims 1-10, characterized in that, The material of the connector (1) includes stainless steel, and the material of the valve seat (2) includes aluminum alloy.

14. A method for manufacturing a valve device, comprising: Insert a portion of the connector (1) into the valve seat (2) such that the first welding surface (11) mates with the second welding surface (21), wherein both the first welding surface (11) and the second welding surface (21) are at an angle to the axial direction of the valve device (1000); and braze the first welding surface (11) and the second welding surface (21) together.

15. The method for manufacturing the valve device according to claim 14, characterized in that, Before the step "inserting the connector into the valve seat", the manufacturing method of the valve device (1000) includes: assembling the connector (1) and the welding ring (3) such that the welding ring (3) is limited or fixedly connected to the connector (1).

16. The method for manufacturing the valve device according to claim 15, characterized in that, The connector (1) includes a main body (12) and a first limiting surface (14). The step "assembling the connector (1) and the welding ring (3)" includes: fitting the welding ring (3) onto the main body so that the welding ring (3) abuts against the first limiting surface (14).

17. The method for manufacturing the valve device according to claim 16, characterized in that, The step "inserting a portion of the connector (1) into the valve seat (2) such that the first welding surface (11) mates with the second welding surface (21)" includes: inserting a portion of the connector (1) into the mounting hole (26) axially, such that a portion of the first welding surface (11) abuts against the second welding surface (21).

18. A valve device (1000), comprising a housing (100), characterized in that, The housing (100) includes a connector (1) and a valve seat (2), the connector (1) being welded to the valve seat (2); the connector (1) includes a first welded wall (11), and the valve seat (2) includes a second welded wall (21); the valve seat (2) has a mounting hole (26), a portion of the connector (1) engaging with a wall forming the mounting hole (26), the wall forming the mounting hole (26) including the second welded wall (21); the extension direction of the centerline of the mounting hole (26) is defined as the axial direction of the valve device (1000), the first... A welding wall (11) has an angle with the axial direction of the valve device (1000), and a second welding wall (21) has an angle with the axial direction of the valve device (1000). The direction perpendicular to the center line of the mounting hole (26) is defined as radial. The second welding wall (21) also has an angle with the radial direction. The first welding wall (11) and the second welding wall (21) are fitted together. The first welding wall (11) and the second welding wall (21) are welded together. At least part of the solder is located between the first welding wall (11) and the second welding wall (21).

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