Fluid control assembly and welding method thereof

Abstract

The fluid control assembly comprises a valve body and a valve element assembly, the valve body is provided with a valve port and comprises a first valve body part and a second valve body part, the first valve body part comprises a plugging part and a melting part, the second valve body part comprises an overflow groove, the melting part is located in the overflow groove and is close to the groove bottom of the overflow groove relative to the plugging part, and the valve element assembly is located in the overflow groove. The blocking part abuts against the second valve body part to seal the flash groove. The plugging part abuts against the second valve body part and seals the overflow groove, and therefore the sealing performance of the fluid control assembly can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of fluid control, and in particular to a fluid control component. Background Art

[0002] The one-way valve includes a valve core, an upper valve body, and a lower valve body, and the upper valve body and the lower valve body are welded together. The valve core can open and close the valve port of the one-way valve. During the welding process of the upper valve body and the lower valve body, the molten solder may flow onto the wall forming the valve port or the valve core, and the valve core and the wall forming the valve port are difficult to abut, which will affect the sealing between the valve core assembly and the wall forming the valve port, and the fluid control assembly may have internal leakage. Therefore, how to improve the sealing of the fluid control assembly is a technical problem to be solved. Summary of the invention

[0003] The purpose of this application is to provide a welding structure that is beneficial to improving the welding effect.

[0004] To achieve the above purpose, an implementation method of the present application adopts the following technical solution:

[0005] A fluid control component includes a valve body and a valve core assembly, the valve body includes a valve cavity, at least part of the valve core assembly is located in the valve cavity, the valve body has a valve port, the valve body includes a first valve body portion and a second valve body portion, the valve core assembly can slide relative to the first valve body portion to open and close the valve port, the first valve body portion includes a sealing portion and a melting portion, the second valve body portion includes an overflow groove, the melting portion is located in the overflow groove, the melting portion is close to the bottom of the overflow groove relative to the sealing portion, the sealing portion and the second valve body portion abut to close the overflow groove, and the melting portion is welded and fixed to the wall forming the overflow groove.

[0006] A welding method, the welding method is the fluid control assembly described in the above scheme, the welding method comprises the following steps:

[0007] Load the molten part into the overflow chute;

[0008] Applying pressure to the first valve body and the second valve body to make the top of the molten portion abut against the first upper wall forming the overflow groove;

[0009] The molten solder in the molten part is melted by laser or ultrasonic wave, and the molten solder in the molten part overflows into the overflow groove;

[0010] The molten melting part abuts against the sealing part and the second valve body part, and the sealing part closes the overflow groove.

[0011] In one embodiment provided by the present application, a fluid control component includes a valve body and a valve core component, the valve body has a valve port, the valve body includes a first valve body portion and a second valve body portion, the first valve body portion includes a sealing portion and a melting portion, the second valve body portion includes an overflow groove, the melting portion is located in the overflow groove, the melting portion is close to the bottom of the overflow groove relative to the sealing portion, the sealing portion and the second valve body portion abut to close the overflow groove; the sealing portion and the second valve body portion abut and close the overflow groove, which can prevent molten solder in the melting portion from flowing to the valve core component or the wall forming the valve port, the solder overflowing to the valve core component or the wall forming the valve port will affect the valve core component to close the valve port, and affect the sealing between the valve core component and the wall forming the valve port, the scheme of the present application can ensure the sealing cooperation between the valve core component and the wall forming the valve port, so it is beneficial to improve the sealing of the fluid control component. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a three-dimensional structural schematic diagram of a first embodiment of the fluid control component provided by the present application from one viewing angle;

[0013] Figure 2 is a structural schematic diagram from another perspective of the first embodiment of the fluid control assembly provided by the present application;

[0014] Figure 3 yes Figure 2 A schematic diagram of the cross-sectional structure of the fluid control component along the AA plane;

[0015] Figure 4 yes Figure 3 The enlarged structural diagram of the middle A part;

[0016] Figure 5 yes Figure 3 A schematic diagram of a three-dimensional structure of the second valve body from one perspective;

[0017] Figure 6 yes Figure 3 A schematic diagram of a three-dimensional structure of the first valve body portion from one perspective;

[0018] Figure 7 yes Figure 3 A schematic diagram of the three-dimensional structure of the middle channel plate from one perspective;

[0019] Figure 8 is an enlarged structural schematic diagram of part A in another embodiment of the fluid control assembly provided by the present application;

[0020] Fig. 9 is an enlarged structural schematic diagram of part A in another embodiment of the fluid control assembly provided by the present application;

[0021] Fig.10 It is a schematic diagram of the enlarged structure of part A in the second embodiment of the fluid control component provided in the present application. DETAILED DESCRIPTION

[0022] The present application is further described below with reference to the accompanying drawings and specific embodiments:

[0023] Combination Figure 1-Figure 7 , illustrating a first embodiment of a fluid control component 100, the fluid control component 100 includes a valve body 1 and a valve core component 2, the valve body 1 has a valve cavity 11 and a valve port 121, at least part of the valve core component 2 is located in the valve cavity 11, and the valve core component 2 can unidirectionally open or close the valve port 121. The fluid control component 100 has an outlet 13, an inlet 14 and a circulation channel 15, at least part of the outlet 13 is located at the side of the valve body 1, at least part of the inlet 14 is located at the end of the valve body 1, the outlet 13 is connected to the valve cavity 11 of the valve body 1, the inlet 14 is connected to the valve cavity 11 of the valve body 1, and the walls forming the circulation channel 15 include the walls of the outlet 13, the valve cavity 11 and the inlet 14. For the convenience of description, the upper and lower directions are defined as the upper and lower directions in the attached drawings of the specification. Figure 1 The up, down, left and right directions of a device only indicate relative positions.

[0024] Reference Figure 3 The valve core assembly 2 includes a valve core 21 and a valve stem 22. In this embodiment, the valve core 21 and the valve stem 22 are an integrated structure. The valve core 21 and the valve stem 22 are made of plastic material, and the two are integrally injection molded, so that the valve core assembly 2 is easy to mold. In other embodiments, the valve core 21 and the valve stem 22 can also be a split structure, and the valve core 21 and the valve stem 22 are fixedly connected or limitedly connected. The fixed connection includes welding, clamping, bonding, etc., and the limited connection includes threaded connection, screw connection, etc.

[0025] Combination Figure 1-Figure 3 In this embodiment, the valve body 1 includes a first valve body portion 5 and a second valve body portion 6, which are welded and connected, and the first valve body portion 5 and the second valve body portion 6 are connected to form a valve cavity 11, and the valve port 121 is located in the first valve body portion 5. The second valve body portion 6 includes a guide portion 68, and the guide portion 68 has a guide hole 681 that penetrates along one side of the axial direction of the valve body 1. At least part of the valve stem 22 is located in the guide hole 681, and the valve stem 22 can slide relative to the first valve body portion 5 along the axial direction of the valve body 1. The valve core 21 and the second valve body portion 6 are slidably matched. In this embodiment, the valve core 21 and the wall forming the valve cavity 11 are slidably matched, and the valve stem 22 can drive the valve core 21 to move up and down. The valve stem 22 realizes the opening and closing of the valve port 121 by driving the valve core 21 to move up and down. When the valve core 21 abuts against the wall forming the valve port 121 , the valve port 121 is in a closed state, and when there is a gap between the valve core 21 and the wall forming the valve port 121 , the valve port 121 is in an open state.

[0026] In this embodiment, the fluid control component 100 includes an elastic member 4, one end of the elastic member 4 abuts against the second valve body portion 6, and the other end of the elastic member 4 abuts against the valve core 21. The elastic member 4 can apply force to the valve core 21 so that the valve core 21 has the force to close the valve port 121.

[0027] The first valve body portion 5 includes a valve port 121 portion 12, and the valve port 121 is located at the valve port 121 portion 12. Along the axial direction of the valve body 1, the inlet 14 is away from the second valve body portion 6 relative to the valve port 121 portion 12. The fluid control component 100 includes a valve closing state. In the valve closing state, the valve core 21 abuts against the wall of the valve port 121 portion 12 to prevent the fluid from flowing from the inlet 14 to the outlet 13.

[0028] The fluid control assembly 100 includes an open valve state, in which a gap exists between the valve core 21 and the wall of the valve port 121, and the fluid can flow from the inlet 14 to the outlet 13. In this embodiment, the fluid control assembly 100 is an L-type fluid control assembly 100, and the fluid can open the valve port 121 from the inlet 14 and enter the valve cavity 11, and finally be discharged from the outlet 13.

[0029] In this embodiment, the fluid control assembly 100 further includes a flow channel plate 3, the flow channel plate 3 includes a receiving chamber 33, at least part of the first valve body 1 is located in the receiving chamber 33, and the flow channel plate 3 and the second valve body portion 6 are welded and fixed. The flow channel plate 3 has a first communication port 34 and a second communication port 35, at least part of the first communication port 34 is located on the side of the flow channel plate 3, the first communication port 34 is connected to the outlet 13, and the second communication port 35 is connected to the inlet 14. The setting of the flow channel plate 3 can control the flow direction of the fluid after it flows out of the outlet 13, and the flow channel plate 3 can also connect the valve body 1 with other components, such as an electronic expansion valve, a ball valve, etc.

[0030] Combination Figure 4-Figure 7In this embodiment, the first valve body 5 includes a plugging portion 511 and a melting portion 52, and the second valve body 6 includes an overflow groove 61. The melting portion 52 is located in the overflow groove 61. The melting portion 52 is close to the groove bottom 613 of the overflow groove 61 relative to the plugging portion 511. The plugging portion 511 and the second valve body 6 abut to close the overflow groove 61, and the melting portion 52 is welded and fixed to the wall forming the overflow groove 61. The plugging portion 511 and the second valve body 6 abut and close the overflow groove 61, so that the molten solder of the melting portion 52 can be prevented from overflowing onto the valve core assembly 2 or the wall forming the valve port 121. The solder overflowing onto the valve core assembly 2 or the wall forming the valve port 121 will affect the valve core assembly 2 closing the valve port 121 and affect the sealing between the valve core assembly 2 and the wall forming the valve port 121. The present application solution can ensure the sealing cooperation between the valve core assembly 2 and the wall forming the valve port 121, so it is beneficial to improve the sealing of the fluid control assembly 100 and prevent internal leakage. In addition, the first valve body 5 and the second valve body 6 are connected by welding, and the welding seam formed by the molten solder realizes the sealing of the first valve body 5 and the second valve body 6. The sealing performance between the first valve body 5 and the second valve body 6 is good, and the process is simple.

[0031] Along the axial direction of the fluid control component 100, at least part of the blocking portion 511 and the overflow groove 61 are aligned, the second valve body 6 includes a first wall 69, the blocking portion 511 abuts against the first wall 69 of the second valve body 6, and the blocking portion 511 closes the groove bottom 613 of the overflow groove 61. In this embodiment, the first valve body 5 and the second valve body 6 are connected by laser welding. The second valve body 6 includes a second body part 62, a first convex portion 63 and a second convex portion 64, the first convex portion 63 is close to the valve port 121 relative to the second body part 62, the second convex portion 64 is close to the valve port 121 relative to the second body part 62, the first convex portion 63 and the second convex portion 64 are both protruding toward the valve port 121, the overflow groove 61 is located between the first convex portion 63 and the second convex portion 64 along the radial direction of the fluid control component 100, and the overflow groove 61 has a downward opening. The first valve body 5 includes a first main body 51 and a blocking portion 511. The first main body 51 is located below the blocking portion 511. The first main body 51 is closer to the valve core 21 than the blocking portion 511. In this embodiment, the melting portion 52 is located in the overflow groove 61. The melting portion 52 includes a top. The top 521 of the melting portion 52 is the end of the melting portion 52 away from the valve core 211. The wall forming the overflow groove 61 includes a first upper wall 611. The melting portion 52 is loaded into the overflow groove 61, and pressure is applied to the first valve body 5 and the second valve body 6, so that the top 521 of the melting portion 52 and the first upper wall 611 forming the overflow groove 61 abut against the blocking portion 511 and the second valve body 6. Part of the blocking portion 511 abuts against the first convex portion 63, and part of the blocking portion 511 abuts against the second convex portion 64. Specifically, the molten portion 52 is melted by laser, and pressure is applied to the first valve body 5 and the second valve body 6 to ensure that the top 521 of the molten portion 52 abuts against the first upper wall 611, which is conducive to improving the welding effect of the top 521 of the molten portion 52 and the first upper wall 611. The molten portion 52 melts and overflows into the overflow groove 61, and the molten portion 52 melts and connects to the first upper wall 611. The molten solder of the molten portion 52 forms a weld between the plugging portion 511 and the molten portion 52, and the plugging portion 511 and the molten portion 52 are connected, and the first valve body 5 and the second valve body 6 are welded and connected and sealed by the weld.

[0032] In this embodiment, the first valve body portion 5 and the second valve body portion 6 are made of plastic material. Specifically, the first valve body portion 5 and the second valve body portion 6 are thermoplastic engineering plastics, such as PPS (polyphenylene sulfide), PP (polypropylene), PPA (polyphthalamide), etc. Plastic material is easy to mold and has low manufacturing cost.

[0033] Combination Figure 4-Figure 7In this embodiment, the height of the first protrusion 63 is greater than the height of the second protrusion 64, the first protrusion 63 includes a second bottom wall 631, and the second protrusion 64 includes a first bottom wall 641. The second bottom wall 631 of the first protrusion 63 is closer to the valve port 121 relative to the first bottom wall 641 of the second protrusion 64, the inner peripheral wall 5111 of the blocking portion 511 abuts against the outer peripheral wall 632 of the first protrusion 63, and the blocking portion 511 includes a first abutting surface 512, which is arranged on the outer periphery of the melting portion 52, and the first abutting surface 512 is closer to the valve core 21 relative to the top 521 of the melting portion 52, that is, the first abutting surface 512 is closer to the valve core 21 relative to the groove bottom 613 of the overflow groove 61, and the first abutting surface 512 abuts against the first bottom wall 641 of the second protrusion 64, so that the molten solder of the melting portion 52 will not overflow onto the valve core 21 or the wall forming the valve port 121. In this embodiment, the first wall 69 refers to the outer periphery of the first protrusion 63 and the first bottom wall 641 of the second protrusion 64. If the molten solder of the melting part 52 overflows onto the valve core 21 or the wall forming the valve port 121, when the valve is closed, it is difficult to seal between the valve core 21 and the wall forming the valve port 121, and the valve cannot be closed, which will affect the sealing of the fluid component and may cause internal leakage. In the present application, the molten solder of the melting part 52 will not overflow onto the valve core 21 or the wall forming the valve port 121, which can ensure the sealing between the valve core 21 and the wall forming the valve port 121, which is conducive to improving the sealing of the fluid control component 100 and preventing internal leakage. In addition, the first abutting surface 512 and the first bottom wall 641 of the second protrusion 64 abut, which can limit the movement of the second valve body 1 relative to the first valve body 5 in the axial direction of the fluid control component 100. In addition, the abutment between the first abutting surface 512 and the first bottom wall 641 can also play a limiting role, preventing the molten portion 52 from being over-melted, thereby preventing the first valve body portion 5 and the second valve body portion 6 from being over-welded. In this embodiment, the first valve body portion 5 and the second valve body portion 6 are made of plastic material, and the plastic material can be elastically deformed. The first abutting surface 512 and the first bottom wall 641 of the second protrusion 64 can be elastically abutted, and the first abutting surface 512 and the first bottom wall 641 of the second protrusion 64 can fit more closely. In this embodiment, the molten portion 52 is partially melted, specifically, the top 521 of the molten portion 52 is melted. In other embodiments, the top wall of the molten portion 52 can also be melted, that is, the part of the molten portion 52 that contacts the first upper wall 611 is melted. In other embodiments, the molten portion 52 can also be completely melted. In other embodiments, the inner circumferential wall 5111 of the sealing portion 511 and the outer circumferential wall 632 of the first protrusion 63, the first abutting surface 512 and the first bottom wall 641 of the second protrusion 64, at least part of the outer circumferential wall 5112 of the sealing portion 511 and the inner circumferential wall 642 of the second protrusion 64 abut, and at least part of the outer circumferential wall 5112 of the sealing portion 511 and the inner circumferential wall 642 of the second protrusion 64 abut can further improve the sealing performance of the flow control component.In the present application, the inner peripheral wall refers to the wall close to the valve stem 22 side, and the outer peripheral wall refers to the wall away from the valve stem 22 side.

[0034] In this embodiment, the volume of the molten portion 52 is smaller than the volume of the overflow groove 61, and there is a gap between the outer peripheral wall 522 of the molten portion 52 and the inner peripheral wall 614 forming the overflow groove 61, so that the molten molten portion 52 can fill the gap between the outer peripheral wall 522 of the molten portion 52 and the inner peripheral wall 614 forming the overflow groove 61, and the gap between the outer peripheral wall 522 of the molten portion 52 and the inner peripheral wall 614 forming the overflow groove 61 is filled with solder, and the outer peripheral wall 522 of the molten portion 52 and the inner peripheral wall 614 forming the overflow groove 61 are welded and connected, so that the welding area between the first valve body portion 5 and the second valve body portion 6 can be increased, thereby improving the welding effect.

[0035] In this embodiment, the materials of the first valve body 5 and the second valve body 6 are the same or approximately the same, so that the first valve body 5 and the second valve body 6 have the same or similar physical properties, the first valve body 5 and the second valve body 6 have good bonding strength, and the welding connection effect of the first valve body 5 and the second valve body 6 is good. The same materials of the first valve body 5 and the second valve body 6 refer to the same element types of the first valve body 5 and the second valve body 6 and the same proportion of each element, and the same or approximately the same materials of the first valve body 5 and the second valve body 6 refer to the roughly the same element types of the first valve body 5 and the second valve body 6.

[0036] Of course, in other embodiments, the first valve body portion 5 and the second valve body portion 6 may also be welded by ultrasonic welding or infrared welding to melt the melting portion 52 by ultrasonic welding or infrared welding.

[0037] In other embodiments, the height of the first protrusion 63 may also be equal to or less than the height of the second protrusion 64, so that the inner wall 5111 of the sealing portion 511 and the outer wall 632 of the first protrusion 63 can abut against each other, and the first abutting surface 512 and the first bottom wall 641 of the second protrusion 64 can abut against each other, which can also prevent the molten solder in the melting portion 52 from overflowing onto the valve core 21 or forming the wall of the valve port 121.

[0038] Combination Figure 4-Figure 7 In this embodiment, the second valve body portion 6 includes a first overflow groove 66, the flow channel plate 3 includes a first melting portion 31 and a third body portion 32, the first melting portion 31 is located above the third body portion 32, and the first melting portion 31 is arranged to protrude upward. The second valve body portion 6 also includes a third protrusion 65, and the third protrusion 65 is arranged to protrude downward. In this embodiment, the first overflow groove 66 is located between the second protrusion 64 and the third protrusion 65. The first overflow groove 66 is close to the outer periphery of the second valve body 1 relative to the overflow groove 61, and the inner peripheral wall forming the first overflow groove 66 includes the outer peripheral wall 643 of the second protrusion 64, and the first overflow groove 66 has a downward opening.

[0039] In this embodiment, the first melting portion 31 is located in the first overflow groove 66, and there is a gap between the outer peripheral wall of the first melting portion 31 and the inner peripheral wall forming the first overflow groove 66. The first top 311 of the first melting portion 31 abuts against the second upper wall 661 forming the first overflow groove 66, and the third protrusion 65 includes a fourth bottom wall 651, and the fourth bottom wall 651 abuts against the top end of the third body portion 32. The first melting portion 31 is melted, and the first melting portion 31 melts and overflows into the first overflow groove 66. The first top 311 of the first melting portion 31 and the second upper wall 661 forming the first overflow groove 66 are welded and connected by a weld, and the outer peripheral wall of the first melting portion 31 and the inner peripheral wall forming the first overflow groove 66 are welded and connected by a weld, so that the flow channel plate 3 and the second valve body portion 6 are welded and sealed. Furthermore, the abutment between the fourth bottom wall 651 and the top end of the third body portion 32 can also prevent the molten solder from overflowing onto the valve core 21 or the wall forming the valve port 121 , which is beneficial to improving the sealing performance of the fluid control component 100 .

[0040] In this embodiment, there is a gap between the third body portion 32 and the outer peripheral wall 5112 of the blocking portion 511 of the second valve body portion 6, so that the flow channel plate 3 and the second valve body portion 6 do not need to be assembled with high precision, which is conducive to reducing the difficulty of assembling the flow channel plate 3 and the second valve body portion 6. In other embodiments, the outer peripheral walls 5112 of the blocking portion 511 of the third body portion 32 and the second valve body portion 6 can also be arranged in contact, which can further prevent the molten solder from overflowing onto the valve core 21 and the wall forming the valve port 121, which is conducive to improving the sealing performance of the fluid control component 100.

[0041] In other embodiments, the second valve body 6 further includes a fourth protrusion (not shown in the figure), the fourth protrusion protrudes downward, the fourth protrusion is located between the second protrusion 64 and the third protrusion 65, and the first overflow groove 66 is located between the third protrusion 65 and the fourth protrusion. The first melting portion 31 is located in the first overflow groove 66, the top of the third body portion 32 abuts against the fourth bottom wall 651 of the third protrusion 65, and the top of the third body portion 32 abuts against the bottom wall of the fourth protrusion, so that the flow channel plate 3 and the second valve body 6 can be welded and sealed.

[0042] Reference Figure 8In another embodiment, the melting portion 52 is located in the overflow groove 61, and the first valve body 5 and the second valve body 6 are pressed. The top 521 of the melting portion 52 abuts against the first upper wall 611 forming the overflow groove 61, and there is a gap between the outer peripheral wall 522 of the melting portion 52 and the inner peripheral wall 614 forming the overflow groove 61. At least part of the blocking portion 511 is located in the overflow groove 61, and the inner peripheral wall 5111 of the blocking portion 511 abuts against the outer peripheral wall 632 of the first convex portion 63, and the outer peripheral wall 5112 of the blocking portion 511 abuts against the inner peripheral wall 642 of the second convex portion 64, so that the first valve body 5 can be prevented from moving radially. In this embodiment, the first wall 69 refers to the outer peripheral wall 632 of the first protrusion 63 and the inner peripheral wall 642 of the second protrusion 64, which melts the melting part 52, and the molten solder of the melting part 52 overflows to the overflow groove 61, so that the welding and sealing of the first valve body part 5 and the second valve body part 6 can be achieved, and the molten solder of the melting part 52 can be prevented from overflowing to the valve core 21 or the wall forming the valve port 121, thereby improving the sealing of the fluid control component 100 and preventing internal leakage. In addition, the inner peripheral wall 5111 of the blocking part 511 abuts against the outer peripheral wall 632 of the first protrusion 63, and the outer peripheral wall 5112 of the blocking part 511 abuts against the inner peripheral wall 642 of the second protrusion 64, which can also prevent the first valve body part 5 from moving radially.

[0043] Reference Fig. 9In another embodiment, the blocking portion 511 includes a first abutting surface 512 and a second abutting surface 513, and the first abutting surface 512 and the second abutting surface 513 are located on both sides of the melting portion 52. In this embodiment, the first abutting surface 512 is arranged on the outer periphery of the melting portion 52, and the first abutting surface 512 is closer to the valve core 21 relative to the groove bottom 613 of the overflow groove 61, and the second abutting surface 513 is arranged on the inner periphery of the melting portion 52, and the second abutting surface 513 is closer to the valve core 21 relative to the top 521 of the melting portion 52. The melting part 52 is loaded into the overflow groove 61, and the melting part 52 is located in the overflow groove 61, and the first valve body 5 and the second valve body 6 are pressed, and the top 521 of the melting part 52 abuts against the first upper wall 611 forming the overflow groove 61, and the second protrusion 64 includes a first bottom wall 641, and the first abutting surface 512 abuts against the first bottom wall 641, and the second protrusion 64 includes a second bottom wall 631, and the second abutting surface 513 abuts against the second bottom wall 631. In this embodiment, the first wall 69 refers to the first bottom wall 641 and the second bottom wall 631, and the melting part 52 is melted, and the molten solder of the melting part 52 overflows into the overflow groove 61, so that the welding and sealing of the first valve body 5 and the second valve body 6 can be realized, and the molten solder of the melting part 52 can be prevented from overflowing to the valve core 21 or the wall forming the valve port 121, thereby improving the sealing of the fluid control component 100 and preventing internal leakage. The setting of the first abutting surface 512 and the second abutting surface 513 also has a limiting function to prevent the second valve body 1 from axially moving relative to the first valve body 5. The setting of the first abutting surface 512 and the second abutting surface 513 can also avoid excessive welding of the first valve body 5 and the second valve body 6.

[0044] In other embodiments, the melting portion 52 is located in the overflow groove 61, at least part of the blocking portion 511 is located in the overflow groove 61, the inner peripheral wall 5111 of the blocking portion 511 abuts against the outer peripheral wall 632 of the first convex portion 63, and the outer peripheral wall 5112 of the blocking portion 511 abuts against the inner peripheral wall 642 of the second convex portion 64. The blocking portion 511 includes a first abutting surface 512 and a second abutting surface 513, the first abutting surface 512 abuts against the first bottom wall 641, the second convex portion 64 includes a first bottom wall 641, and the second abutting surface 513 abuts against the first bottom wall 641, which can also improve the sealing performance of the fluid control assembly 100 and prevent internal leakage.

[0045] Reference Fig.10 , illustrating a second embodiment of a fluid control component 100, the second valve body portion 6 includes an overflow groove 61 and a groove 67, the overflow groove 61 and the groove 67 are connected, the overflow groove 61 is close to the inner wall of the second valve body portion 6 relative to the groove 67, the overflow groove 61 has an opening toward the outer periphery of the second valve body portion 6, the groove 67 has an opening toward the valve core 21, the overflow groove 61 is located above the groove 67, and the overflow groove 61 and the groove 67 are both located between the first convex portion 63 and the second convex portion 64.

[0046] The melting part 52 is located on one side of the plugging part 511. In this embodiment, the melting part 52 is arranged on one side close to the inner periphery of the plugging part 511. The outer diameter of the melting part 52 is smaller than the inner diameter of the groove 67, so that the melting part 52 can be loaded from the groove 67 and then loaded into the overflow groove 61. The first valve body 5 and the second valve body 6 are pressed to make the top 521 of the melting part 52 abut against the first upper wall 611 forming the overflow groove 61, the bottom of the melting part 52 abut against the third bottom wall 612 forming the overflow groove 61, and there is a gap between the inner peripheral wall of the melting part 52 and the inner peripheral wall 614 forming the overflow groove 61, and the outer peripheral wall 5112 of the plugging part 511 abuts against the inner peripheral wall forming the groove 67. In this embodiment, the first wall 69 refers to the inner circumferential wall 614 forming the overflow groove 61. The upper end of the second valve body 6 is irradiated with a laser, the melting portion 52 is melted, and the molten solder fills the gap between the top 521 of the melting portion 52 and the first upper wall 611 forming the overflow groove 61. The molten solder fills the gap between the inner circumferential wall of the melting portion 52 and the inner circumferential wall 614 forming the overflow groove 61, thereby realizing the welding and sealing of the first valve body 5 and the second valve body 6, and the outer circumferential wall 5112 of the sealing portion 511 is abutted against the inner circumferential wall forming the groove 67. This can also prevent the molten solder in the melting portion 52 from overflowing onto the valve core 21 or the wall forming the valve port 121, thereby improving the sealing of the fluid control component 100 and preventing internal leakage.

[0047] The welding cooperation method between the flow channel plate 3 and the second valve body part 6 is based on the same principle as the welding cooperation method between the second valve body part 6 and the first valve body part 5. The cooperation method between the flow channel plate 3 and the second valve body part 6 is similar to the cooperation method between the valve body 1 and the second valve body part 6 described in the above scheme, which will not be repeated here.

[0048] In conjunction with the figure, a welding method, a fluid control assembly 100 of the welding method, the welding method is used for the fluid control assembly 100, and the welding method includes the following steps:

[0049] Load the molten portion 52 into the overflow trough 61;

[0050] Apply pressure to the first valve body 5 and the second valve body 6 so that the top 521 of the melting portion 52 abuts against the first upper wall 611 forming the overflow groove 61;

[0051] The melting portion 52 is melted by laser or ultrasonic wave, and the molten solder of the melting portion 52 overflows into the overflow groove 61;

[0052] The molten melting portion 52 to the blocking portion 511 abuts against the second valve body portion 6 , and the blocking portion 511 closes the overflow groove 61 .

[0053] 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 in this specification with reference to the above embodiments, it should be understood by those skilled in the art that the present invention can still be modified or replaced by equivalents, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A fluid control assembly (100), characterized in that: The invention comprises a valve body (1) and a valve core assembly (2), wherein the valve body (1) comprises a valve cavity (11), at least a portion of the valve core assembly (2) is located in the valve cavity (11), the valve body (1) has a valve port (121), the valve body (1) comprises a first valve body portion (5) and a second valve body portion (6), the valve core assembly (2) can slide relative to the first valve body portion (5) to open and close the valve port (121), the first valve body portion (5) comprises a blocking portion (56) 11) and a melting portion (52), the second valve body portion (6) includes an overflow groove (61), the melting portion (52) is located in the overflow groove (61), the melting portion (52) is close to the bottom (613) of the overflow groove (61) relative to the blocking portion (511), the blocking portion (511) and the second valve body portion (6) are abutted to close the overflow groove (61), and the melting portion (52) is welded and fixed to the wall forming the overflow groove (61).

2. The fluid control assembly (100) according to claim 1, characterized in that: Along the axial direction of the fluid control component (100), at least part of the sealing portion (511) and the overflow groove (61) are aligned, the second valve body portion (6) includes a first wall (69), the sealing portion (511) and the first wall (69) of the second valve body portion (6) are in abutment with each other, and the sealing portion (511) closes the bottom (613) of the overflow groove (61).

3. The fluid control assembly (100) according to claim 2, characterized in that: The second valve body portion (6) includes a first protrusion (63) and a second protrusion (64), and the first protrusion (63) and the second protrusion (64) both protrude toward the valve port (121). Along the radial direction of the fluid control component (100), the overflow groove (61) is located between the first protrusion (63) and the second protrusion (64), and part of the sealing portion (511) is abutted against the first protrusion (63), and part of the sealing portion (511) is abutted against the second protrusion (64).

4. The fluid control assembly (100) according to claim 3, characterized in that: The inner peripheral wall (5111) of the sealing portion (511) abuts against the outer peripheral wall (632) of the first protrusion (63), and the sealing portion (511) includes a first abutting surface (512), and the first abutting surface (512) is arranged on the outer periphery of the melting portion (52), and the first abutting surface (512) is closer to the valve core (21) relative to the groove bottom (613) of the overflow groove (61), and the first abutting surface (512) abuts against the first bottom wall (641) of the second protrusion (64).

5. The fluid control assembly (100) according to claim 3, characterized in that: The inner peripheral wall (5111) of the sealing portion (511) abuts against the outer peripheral wall (632) of the first protrusion (63), and the outer peripheral wall (5112) of the sealing portion (511) abuts against the inner peripheral wall (642) of the second protrusion (64).

6. The fluid control assembly (100) according to claim 3 or 5, characterized in that: The sealing portion (511) includes a first abutting surface (512) and a second abutting surface (513), wherein the first abutting surface (512) is arranged on the outer periphery of the melting portion (52), and the first abutting surface (512) is closer to the valve core (21) relative to the bottom (613) of the overflow groove (61), and the second abutting surface (513) is arranged on the inner periphery of the melting portion (52), and the second abutting surface (513) is closer to the valve core (21) relative to the top (521) of the melting portion (52), the first abutting surface (512) abuts against the first bottom wall (641) of the first protrusion (63), and the second abutting surface (513) abuts against the second bottom wall (631) of the second protrusion (64).

7. The fluid control assembly (100) according to claim 3, characterized in that: The overflow groove (61) has an opening toward the outer periphery of the second valve body portion (6), the melting portion (52) is located in the overflow groove (61), the second valve body portion (6) includes a groove (67), the groove (67) and the overflow groove (61) are connected, the groove (67) has an opening toward the valve port (121), at least part of the sealing portion (511) is located in the groove (67), and the outer peripheral wall (5111) of the sealing portion (511) is abutted against the inner peripheral wall (671) forming the groove (67).

8. The fluid control assembly (100) according to any one of claims 4 to 7, characterized in that: The molten portion (52) is melted by laser or ultrasonic wave, and pressure is applied to the first valve body portion (5) and the second valve body portion (6), so that the molten portion (52) melts and overflows into the overflow groove (61), and the first valve body portion (5) and the second valve body portion (6) are welded and connected and sealed by the weld.

9. The fluid control assembly (100) according to claim 8, characterized in that: The fluid control component (100) further comprises a flow channel plate (3), the flow channel plate (3) comprises a receiving cavity (33), at least a portion of the first valve body (1) is located in the receiving cavity (33), the second valve body portion (6) comprises a first overflow groove (66), the flow channel plate (3) comprises a first melting portion (31), the first melting portion (31) is located in the first overflow groove (66), the first melting portion (31) is melted, the first melting portion (31) melts and overflows into the first overflow groove (66), and the flow channel plate (3) is welded to the second valve body portion (6).

10. The fluid control assembly (100) according to claim 10, characterized in that: The valve core assembly (2) comprises a valve core (21) and a valve stem (22); the valve core (21) and the valve stem (22) are an integral structure, or the valve core (21) and the valve stem (22) are a separate structure; the valve core (21) and the valve stem (22) are fixedly connected or limit-connected; the valve stem (22) and the second valve body (1) are slidingly matched; the valve core (21) and the first valve body (1) are slidingly matched; the valve stem (22) can drive the valve core (21) to move along the axial direction of the valve body (1) and open or close the valve port (121).

11. A welding method, characterized in that: The welding method is used for the fluid control assembly (100) according to any one of claims 1 to 10, and the welding method comprises the following steps: Loading the molten portion (52) into the overflow trough (61); Applying pressure to the first valve body portion (5) and the second valve body portion (6) so that the top portion (521) of the melting portion (52) abuts against the first upper wall (611) forming the overflow groove (61); The melting portion (52) is melted by laser or ultrasonic wave, and the molten solder of the melting portion (52) overflows into the overflow groove (61); The molten melting portion (52) abuts against the sealing portion (511) and the second valve body portion (6), and the sealing portion (511) closes the overflow groove (61).

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