One-way valve

Abstract

The one-way valve comprises a valve body, and a valve cavity is formed in the valve body; the valve body comprises a valve seat and a valve cover, in the axial direction, the valve seat is provided with a first end facing the valve cover, the valve cover is provided with a second end facing the valve seat, and the first end is in butt joint with the second end; an annular boss is arranged on the end face of one of the first end and the second end, an annular groove is formed in the end face of the other one of the first end and the second end, the annular boss is contained in the annular groove, and the annular boss and the annular groove are arranged around the valve cavity. The valve seat and the valve cover are both made of plastic, the valve seat and the valve cover are connected between the annular boss and the annular groove in a welded mode, and welding marks formed by welding are filled in the annular groove and bonded with the groove wall of the annular groove.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of valves, in particular to a one-way valve. BACKGROUND

[0002] In the prior art, a one-way valve has components such as a valve cover, a valve seat, and a valve core. The valve seat is usually made of plastic material, and the valve cover is usually made of metal material, which results in a high manufacturing cost of the one-way valve.

[0003] How to reduce the manufacturing material cost of the one-way valve components while ensuring the fixed assembly effect of the valve seat and the valve cover has become an important issue to be solved in the related field. CONTENT OF THE INVENTION

[0004] One main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art, and to provide a one-way valve with a lower material cost and a better fixed assembly effect of the valve seat and the valve cover.

[0005] To achieve the above-mentioned purpose, the present disclosure adopts the following technical solutions:

[0006] According to one aspect of the present disclosure, a one-way valve is provided, wherein: the one-way valve comprises a valve body, and the valve body is internally provided with a valve cavity; the valve body comprises a valve seat and a valve cover, and along an axial direction, the valve seat has a first end portion facing the valve cover, and the valve cover has a second end portion facing the valve seat, and the first end portion and the second end portion are in abutment; an end surface of one of the first end portion and the second end portion is provided with a ring-shaped boss, and an end surface of the other one is provided with a ring-shaped groove, the ring-shaped boss is accommodated in the ring-shaped groove, and the ring-shaped boss and the ring-shaped groove are both arranged around the valve cavity; the valve seat and the valve cover are both made of plastic material, and the valve seat and the valve cover are welded and connected between the ring-shaped boss and the ring-shaped groove, and a welding mark formed by welding is filled in the ring-shaped groove and is bonded with a groove wall of the ring-shaped groove.

[0007] According to one of the embodiments of the present disclosure, among the valve seat and the valve cover, the material of one provided with the ring-shaped groove is light-transmitting plastic, and the material of the other one is non-light-transmitting plastic, and the valve seat and the valve cover are welded and connected between the ring-shaped boss and the ring-shaped groove by using a laser welding process, so that the end portion of the ring-shaped boss facing the ring-shaped groove is partially melted during the welding process to form the welding mark.

[0008] According to one of the embodiments of the present disclosure, the ring-shaped boss has a welding end portion facing the valve cover; the welding end portion is in abutment with a bottom wall of the ring-shaped groove; and the welding end portion can act as an electrode, and the welding end portion is melted and bonded with the bottom wall of the ring-shaped groove during welding.

[0009] According to one of the embodiments of the present disclosure, the annular boss has a welding end facing the valve cover, and when the annular boss is not welded, the welding end has a gap between the two side walls of the annular groove; wherein the welding end melts to fill at least part of the gap when welded.

[0010] According to one of the embodiments of the present disclosure, when the annular boss is not welded, the width of the welding end in the radial direction is smaller than the width of other parts of the annular boss in the radial direction, so that when the annular boss is assembled in the annular groove, the welding end has a gap between the two side walls of the annular groove; wherein the welding end melts to fill at least part of the gap when welded; or, when the annular boss is not welded, the groove width of the annular groove corresponding to the welding end is greater than the groove width of the annular groove corresponding to other parts of the annular boss, so that when the annular boss is assembled in the annular groove, the welding end has a gap between the two side walls of the annular groove; wherein the welding end melts to fill at least part of the gap when welded.

[0011] According to one of the embodiments of the present disclosure, the annular boss has an inner annular surface and an outer annular surface, and the annular groove has an inner side groove wall facing the inner annular surface and an outer side groove wall facing the outer annular surface; wherein in the axial direction, the height of the inner side groove wall is greater than the height of the outer side groove wall, so that the annular groove forms a protruding part further protruding towards the valve seat at the inner side groove wall.

[0012] According to one of the embodiments of the present disclosure, the annular boss has an inner annular surface and an outer annular surface, and the annular groove has an inner side groove wall facing the inner annular surface and an outer side groove wall facing the outer annular surface; wherein the inner annular surface and the inner side groove wall are in interference fit.

[0013] According to one of the embodiments of the present disclosure, the annular groove is arranged on the end face of the second end of the valve cover; wherein the valve cover comprises a body part and an annular assembly part, the annular assembly part is arranged on the periphery of the body part close to one end of the valve seat, and the annular groove is arranged on the annular assembly part.

[0014] According to one of the embodiments of the present disclosure, in the axial direction, the ratio of the groove depth of the annular groove to the thickness of the annular assembly part is 1 / 2-3 / 4.

[0015] According to one of the embodiments of the present disclosure, the valve cover has a second cavity in the valve cover, and the second cavity is open at the second end; wherein the valve cover is manufactured by an injection molding process, the annular groove is arranged on an end face of the second end of the valve cover, and the end face is further provided with a process groove, and the process groove is arranged between the annular groove and the second cavity.

[0016] According to one of the embodiments of the present disclosure, the process groove is annular, and the process groove is arranged around the second cavity.

[0017] According to one of the embodiments of the present disclosure, a plurality of reinforcing ribs are arranged in the process groove, and the reinforcing ribs are arranged in a circumferential direction of the process groove and are arranged at intervals to divide the process groove into a plurality of sub-grooves.

[0018] From the above technical solutions, the one-way valve provided by the present disclosure has the following advantages and positive effects:

[0019] The valve body of the one-way valve provided by the present disclosure includes a valve seat and a valve cover, and a first end of the valve seat is connected to a second end of the valve cover. An end face of one of the first end and the second end is provided with an annular boss, and an end face of the other one is provided with an annular groove. The annular boss is accommodated in the annular groove, and the annular boss and the annular groove are arranged around the valve cavity. The valve seat and the valve cover are made of plastic, and the valve seat and the valve cover are connected by welding between the annular boss and the annular groove. The welding mark formed by welding is filled in the annular groove and is bonded with the groove wall of the annular groove. Through the above structure design, the valve seat and the valve cover are made of plastic, which can reduce the material cost of the one-way valve. On this basis, the valve seat and the valve cover made of plastic are difficult to be connected and assembled by the existing riveting process. Therefore, the valve seat and the valve cover are assembled by the annular boss and the annular groove and are welded, so that the connection of the valve seat and the valve cover is more reliable, and the fixed assembly effect of the valve seat and the valve cover is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] The various objects, features and advantages of the present disclosure will become more apparent from the following detailed description of preferred embodiments of the present disclosure, considered in conjunction with the drawings. The drawings are not necessarily to scale, with emphasis being placed on illustrating the principles of the present disclosure. In the drawings, like reference numerals identify the same or similar parts throughout the views. Among them:

[0021] Figure 1 is a perspective structural schematic view of a one-way valve according to an exemplary embodiment;

[0022] Figure 2 is Figure 1 is an axial sectional view of the one-way valve shown;

[0023] Figure 3 isFigure 2 enlarged schematic view of the A portion in FIG. 1;

[0024] Figure 4 is Figure 3 a schematic view of an unwelded state of the valve seat;

[0025] Figure 5 is Figure 1 a schematic view of a one-way valve shown in FIG. 2;

[0026] Figure 6 is Figure 5 a schematic view of a valve seat shown in FIG. 3;

[0027] Figure 7 is Figure 5 a schematic view of a valve cover shown in FIG. 4.

[0028] Reference signs are explained as follows:

[0029] 100. valve seat;

[0030] 101. first cavity;

[0031] 110. ring-shaped boss;

[0032] 1101. inner annular surface;

[0033] 1102. outer annular surface;

[0034] 111. welded end portion;

[0035] 200. valve cover;

[0036] 201. body portion;

[0037] 202. ring-shaped fitting portion;

[0038] 203. second cavity;

[0039] 210. ring-shaped groove;

[0040] 2101. inner groove wall;

[0041] 2102. outer groove wall;

[0042] 2103. bottom wall;

[0043] 220. protrusion portion;

[0044] 230. process groove;

[0045] 231. reinforcing rib;

[0046] 310. valve port;

[0047] 400. valve core;

[0048] G1. Gap;

[0049] G2. Assembly gap;

[0050] H1. Groove depth;

[0051] H2. Thickness. DETAILED DESCRIPTION

[0052] Embodiments embodying the features and advantages of the present disclosure will be described in detail hereinafter. It should be understood that the present disclosure can be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and fully convey the scope of the disclosure to those skilled in the art.

[0053] In the following description of various example embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various example structures, systems, and steps in which aspects of the present disclosure can be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps can be utilized and that structural and functional modifications can be made without departing from the scope of the present disclosure. Also, while the terms "over," "between," "inside," "on," "under," "to" and the like can be used in the description herein to describe the relative positioning of particular structures as illustrated in the accompanying drawings, these terms are used here for convenience only and is not to be construed as limiting the scope of the present disclosure in any manner. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of structures in order to fall within the scope of the present disclosure.

[0054] Referring to Figure 1 , a perspective view of a one-way valve according to the present disclosure is shown. In this example embodiment, the one-way valve according to the present disclosure is described in the context of a valve for use in a refrigeration system. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes can be made to the specific embodiments described below without departing from the principles of the one-way valve according to the present disclosure.

[0055] As shown in Figure 1 , in one embodiment of the present disclosure, the one-way valve according to the present disclosure includes a valve body and a valve core 400. The valve body has a valve cavity (e.g., including a first cavity 101 and a second cavity 203 as shown) with a valve port 310. The valve core 400 is disposed in the valve cavity and is axially movable, and is configured to open or close the valve port 310. Referring to Figure 2 , a cross-sectional view of the one-way valve according to the present disclosure is shown. Figures 2 to 7 Figure 2 , a cross-sectional view of the one-way valve according to the present disclosure is shown. Figure 3 Figure 2 ​​A portion of the drawings herein are shown on an enlarged scale; Figure 4 A portion of the drawings herein are shown on an enlarged scale; Figure 3 A portion of the drawings herein are shown on an enlarged scale; Figure 5 A portion of the drawings herein are shown on an enlarged scale; Figure 6 A portion of the drawings herein are shown on an enlarged scale; Figure 7 A portion of the drawings herein are shown on an enlarged scale. The structure, connection mode and functional relationship of each main component of the one-way valve according to the present disclosure will be described in detail below in combination with the above drawings.

[0056] As shown in Figures 1 to 7 In an embodiment of the present disclosure, the valve body comprises a valve seat 100 and a valve cover 200. In the axial direction, the valve seat 100 has a first end portion facing the valve cover 200, the valve cover 200 has a second end portion facing the valve seat 100, and the valve seat 100 and the valve cover 200 are connected via the first end portion and the second end portion. On this basis, the end face of the first end portion is provided with a ring-shaped boss 110, and the end face of the second end portion is provided with a ring-shaped groove 210, the ring-shaped boss 110 is accommodated in the ring-shaped groove 210, and the ring-shaped boss 110 and the ring-shaped groove 210 are arranged around the valve cavity. The material of the valve seat 100 and the valve cover 200 is plastic, the valve seat 100 and the valve cover 200 are connected by welding between the ring-shaped boss 110 and the ring-shaped groove 210, and the welding mark formed by welding is filled in the ring-shaped groove 210 and bonded with the groove wall of the ring-shaped groove 210. Through the above structure design, the present disclosure uses plastic as the material of the valve seat 100 and the valve cover 200, which can reduce the material cost of the one-way valve. On this basis, the valve seat 100 and the valve cover 200 made of plastic are difficult to be connected and assembled by the existing riveting process. Therefore, the present disclosure assembles and welds the ring-shaped boss 110 and the ring-shaped groove 210, so that the connection of the valve seat 100 and the valve cover 200 is more reliable, and the fixed assembly effect of the valve seat 100 and the valve cover 200 is improved.

[0057] It should be noted that, Figures 1 to 7 The embodiment shown is described by taking the ring-shaped boss 110 arranged on the valve seat 100 and the ring-shaped groove 210 arranged on the valve cover 200 as an example. In another embodiment of the present disclosure, the ring-shaped boss 110 can also be arranged on the end face of the second end portion of the valve cover 200, and the ring-shaped groove 210 can also be arranged on the end face of the first end portion of the valve seat 100. In other words, in various possible embodiments consistent with the design concept of the present disclosure, the end face of one of the first end portion and the second end portion is provided with the ring-shaped boss 110, and the end face of the other is provided with the ring-shaped groove 210.

[0058] As shown in Figure 2As shown in the embodiment of the present disclosure, the material of the valve cover 200 can be light-transmitting plastic, and the material of the valve seat 100 can be light-blocking plastic. In other words, among the valve seat 100 and the valve cover 200, the material of the one provided with the annular groove 210 is light-transmitting plastic, and the material of the other is light-blocking plastic. On this basis, the valve seat 100 and the valve cover 200 can be welded and connected by laser welding between the annular boss 110 and the annular groove 210, and accordingly, the welding process can be referred to as Figure 2 The laser irradiation direction shown is used as an auxiliary understanding, and accordingly, the end of the annular boss 110 facing the annular groove 210 is partially melted to form a welding mark during the welding process. Through the above design, the present disclosure can utilize laser to pass through the valve cover 200 with light-transmitting plastic material and irradiate to the annular boss 110, and accordingly, the melting of the welded end 111 of the annular boss 110 is realized, so as to bond with the groove wall of the annular groove 210.

[0059] As shown in the embodiment of the present disclosure, the material of the valve cover 200 can be light-transmitting plastic, and the material of the valve seat 100 can be light-blocking plastic. In other words, among the valve seat 100 and the valve cover 200, the material of the one provided with the annular groove 210 is light-transmitting plastic, and the material of the other is light-blocking plastic. On this basis, the valve seat 100 and the valve cover 200 can be welded and connected by laser welding between the annular boss 110 and the annular groove 210, and accordingly, the welding process can be referred to as Figure 3 As shown in the embodiment of the present disclosure, the annular boss 110 has a welded end 111 facing the valve cover 200, and the welded end 111 is in contact with the bottom wall 2103 of the annular groove 210. Among them, the welded end 111 can act as a welding rod when the valve cover 200 and the valve seat 100 are welded, that is, the welded end 111 is melted during welding and bonded with the bottom wall 2103 of the annular groove 210. Through the above structural design, by utilizing the material properties of plastic, the present disclosure can utilize the welded end 111 as a welding rod to melt during welding and bond with the bottom wall 2103, ensuring the smooth implementation of welding.

[0060] As shown in the embodiment of the present disclosure, the annular boss 110 has a welded end 111 facing the valve cover 200, and the welded end 111 is in contact with the bottom wall 2103 of the annular groove 210. Among them, the welded end 111 can act as a welding rod when the valve cover 200 and the valve seat 100 are welded, that is, the welded end 111 is melted during welding and bonded with the bottom wall 2103 of the annular groove 210. Through the above structural design, by utilizing the material properties of plastic, the present disclosure can utilize the welded end 111 as a welding rod to melt during welding and bond with the bottom wall 2103, ensuring the smooth implementation of welding. Figure 4 As shown in the embodiment of the present disclosure, when the annular boss 110 is not welded, the welded end 111 has a gap G1 between the two side walls of the annular groove 210, for example, between the two side faces of the welded end 111 and the inner groove wall 2101 and the outer groove wall 2102 of the annular groove 210. And since the connecting end 111 will at least partially melt during the welding process as a welding rod, that is, the length of the connecting end 111 when not welded is greater than the groove depth of the annular groove 210, therefore, there will be an assembly gap G2 between the valve cover 200 and the valve seat 100 when not welded. Accordingly, the welded end 111 melts during welding to fill at least part of the gap G1 and bond with the groove wall of the annular groove 210. And because the welded end 111 partially melts, the assembly gap G2 between the valve cover 200 and the valve seat 100 disappears, that is, the valve cover 200 and the valve seat 100 abut. Through the above structural design, by utilizing the material properties of plastic, the present disclosure can accommodate the volume expansion of the melted material during welding by reserving the gap G1, ensuring the smooth implementation of welding. It should be noted that in order to show the state of the welded end 111 not melted and the assembly gap G2, Figure 4The state of the ring-shaped boss 110 and the ring-shaped groove 210 when not welded is shown. It should be understood that when the one-way valve product according to the principles of the present disclosure is disassembled, for example, cut, the gap G1 described above can not be observed between the ring-shaped groove 210 and the ring-shaped boss 110, that is, the molten welding mark can have completely filled the space not occupied by the ring-shaped boss 110 in the ring-shaped groove 210. In some embodiments, the gap G1 described above can also be formed in other ways, for example, the groove width of the ring-shaped groove 210 at the welding end portion 111 is greater than the groove width of the ring-shaped groove 210 at other parts of the ring-shaped boss 110, at which time the width of the connection end portion 111 in the radial direction and the width of the other parts of the ring-shaped boss 110 in the radial direction are not limited, for example, can be equal, and the gap G1 described above can also be formed, and is not limited to the present embodiment.

[0061] In order to facilitate the formation of the gap G1, the ring-shaped boss 110 includes two sections with different widths in the radial direction, namely the welding end portion 111 and the other parts of the non-welding end portion 111, and the groove width of the ring-shaped groove 210 is equally arranged. When the ring-shaped boss 110 is not welded, the width of the welding end portion 111 in the radial direction is less than the width of the other parts of the ring-shaped boss 110 in the radial direction, so that when the ring-shaped boss 110 is assembled in the ring-shaped groove 210, the welding end portion 111 forms a gap G1 between the two side walls of the ring-shaped groove 210; wherein the welding end portion 111 melts to fill at least part of the gap G1 when welded.

[0062] As shown in Figure 3 In an embodiment of the present disclosure, the ring-shaped boss 110 has an inner ring surface 1101 and an outer ring surface 1102, and the ring-shaped groove 210 has an inner side groove wall 2101 facing the inner ring surface 1101 and an outer side groove wall 2102 facing the outer ring surface 1102. On this basis, in the axial direction, the height of the inner side groove wall 2101 can be greater than the height of the outer side groove wall 2102, so that the valve cover 200 forms a protruding portion 220 further protruding towards the valve seat 100 at the inner side groove wall 2101 of the ring-shaped groove 210. Through the above structural design, the present disclosure can prolong the corresponding arrangement length in the axial direction between the inner side groove wall 2101 and the inner ring surface 1101, and accordingly further prolong the leakage path between the connection part of the ring-shaped boss 110 and the ring-shaped groove 210 and the outside, and further improve the sealing performance of the one-way valve.

[0063] As shown in Figure 3As shown, in one embodiment of this disclosure, the annular boss 110 has an inner annular surface 1101 and an outer annular surface 1102, and the annular groove 210 has an inner groove wall 2101 and an outer groove wall 2102. Based on this, the inner annular surface 1101 and the inner groove wall 2101 can be an interference fit. Accordingly, during assembly, the inner annular surface 1101 and the inner groove wall 2101 can be press-fitted together with the interference fit to ensure coaxiality during assembly and prevent misalignment between different components during subsequent welding. Through the above structural design, this disclosure can optimize the assembly quality of the valve seat 100 and the valve cover 200, and is beneficial to improving the structural strength and sealing performance of the one-way valve.

[0064] like Figure 2 and Figure 7 As shown, in one embodiment of this disclosure, the valve cover 200 may include a body portion 201 and an annular assembly portion 202, which is disposed on the periphery of the body portion 201 near the valve seat 100. Based on this, an annular groove 210 may be disposed in the annular assembly portion 202. Through the above structural design, this disclosure utilizes the annular assembly portion 202 to provide the annular groove 210 and to assemble and weld it to the valve seat 100, thereby eliminating the need to design the body portion 201 to match the size of the valve seat 100, which helps to reduce the volume of the valve cover 200.

[0065] like Figure 3 As shown, based on the structural design of the annular groove 210 disposed in the annular assembly portion 202, in one embodiment of this disclosure, along the axial direction, the groove depth H1 of the annular groove 210 in the thickness H2 of the annular assembly portion 202 can be 1 / 2 to 3 / 4, for example, 1 / 2, 3 / 5, 5 / 8, 2 / 3, or 3 / 4. Through the above structural design, this disclosure can avoid the groove depth H1 of the annular groove 210 being too small, thus affecting the assembly strength of the valve seat 100 and the valve cover 200, and at the same time, it can avoid the groove depth H1 of the annular groove 210 being too large, thus affecting the structural strength of the annular assembly portion 202. In some embodiments, the groove depth H1 of the annular groove 210 in the thickness H2 of the annular assembly portion 202 can also be less than 1 / 2 or greater than 3 / 4, for example, 2 / 5 or 4 / 5, and is not limited to this embodiment.

[0066] like Figure 2 and Figure 7As shown in the drawings, in an embodiment of the present disclosure, the valve seat 100 has a first cavity 101 which is open at the first end, and the valve cover 200 has a second cavity 203 which is open at the second end, and the first cavity 101 and the second cavity 203 are in communication and jointly form a valve cavity of the valve body. On this basis, the valve cover 200 can be manufactured by an injection molding process, the annular groove 210 is arranged on the end face of the second end of the valve cover 200, and the second end face can also be provided with a process groove 230 which is arranged between the annular groove 210 and the second cavity 203 in a spaced manner. Through the above structural design, the present disclosure can avoid that the thickness of the valve cover 200 at the position between the annular groove 210 and the second cavity 203 is too large, and accordingly avoid that the above position is deformed in the injection molding process of the valve cover 200.

[0067] As shown in the drawings, Figure 7 In an embodiment of the present disclosure based on the structural design that the process groove 230 is arranged on the second end face of the valve cover 200, the process groove 230 can be annular, that is, the process groove 230 is arranged around the second cavity 203. Through the above structural design, the present disclosure can further avoid that the valve cover 200 is deformed in the injection molding process.

[0068] As shown in the drawings, Figure 7 In an embodiment of the present disclosure based on the structural design that the annular process groove 230 is arranged on the second end face of the valve cover 200, a plurality of reinforcing ribs 231 can be arranged in the process groove 230, and the reinforcing ribs 231 are arranged in a circumferential direction in a spaced manner to divide the process groove 230 into a plurality of sub-groove bodies. Through the above structural design, the present disclosure can provide a supporting and reinforcing function by the reinforcing ribs 231 to avoid that the valve cover 200 is deformed due to the arrangement of the annular process groove 230.

[0069] It should be noted that the one-way valve shown in the drawings and described in the specification is only a few examples of many kinds of one-way valves that can adopt the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are by no means limited to any details or any components of the one-way valve shown in the drawings or described in the specification.

[0070] In summary, the valve body of the one-way valve provided by the present disclosure comprises a valve seat 100 and a valve cover 200, the first end of the valve seat 100 is opposite to the second end of the valve cover 200; the end face of one of the first end and the second end is provided with a ring-shaped boss 110, and the end face of the other one is provided with a ring-shaped groove 210, the ring-shaped boss 110 is accommodated in the ring-shaped groove 210, and the ring-shaped boss 110 and the ring-shaped groove 210 are arranged around the valve cavity; the materials of the valve seat 100 and the valve cover 200 are plastic, the valve seat 100 and the valve cover 200 are welded and connected between the ring-shaped boss 110 and the ring-shaped groove 210, the welding marks formed by welding are filled in the ring-shaped groove 210 and are bonded with the groove wall of the ring-shaped groove 210. Through the above structure design, the present disclosure adopts plastic as the material of the valve seat 100 and the valve cover 200, so as to reduce the material cost of the one-way valve. On this basis, the valve seat 100 and the valve cover 200 which are both made of plastic are difficult to be connected and assembled by using the existing riveting process, for this, the present disclosure assembles and welds the ring-shaped boss 110 and the ring-shaped groove 210, so that the connection between the valve seat 100 and the valve cover 200 is more reliable, and the fixed assembly effect of the valve seat 100 and the valve cover 200 is improved.

[0071] The exemplary embodiments of the one-way valve provided by the present disclosure are described and / or illustrated in detail above. However, the embodiments of the present disclosure are not limited to the specific embodiments described herein, but rather, components of each embodiment and / or steps can be used independently and separately from other components and / or steps described herein. Each component and / or step of one embodiment can also be used in combination with other components and / or steps of other embodiments. The language used in the description herein has been principally selected for readability and instructional purposes and can not have been selected to delineate or circumscribe the patent rights. It is therefore intended that references to "one embodiment" or "an embodiment" of the present disclosure should be interpreted as including all embodiments of the present disclosure, including exemplary embodiments of the present disclosure.

[0072] Although the one-way valve provided by the present disclosure has been described in accordance with various specific embodiments, it will be recognized that modifications can be made to the embodiments of the present disclosure within the spirit and scope of the claims.

Claims

1. A one-way valve characterized in that: the one-way valve comprises a valve body, the valve body is internally provided with a valve cavity; the valve body comprises a valve seat (100) and a valve cover (200), along the axial direction, the valve seat (100) has a first end portion facing the valve cover (200), the valve cover (200) has a second end portion facing the valve seat (100), the first end portion and the second end portion are in opposite connection; the end face of one of the first end portion and the second end portion is provided with a ring-shaped boss (110), and the end face of the other one is provided with a ring-shaped groove (210), the ring-shaped boss (110) is accommodated in the ring-shaped groove (210), and the ring-shaped boss (110) and the ring-shaped groove (210) are arranged around the valve cavity; the valve seat (100) and the valve cover (200) are made of plastic, the valve seat (100) and the valve cover (200) are welded and connected between the ring-shaped boss (110) and the ring-shaped groove (210), a welding mark formed by welding is filled in the ring-shaped groove (210) and is bonded with the groove wall of the ring-shaped groove (210).

2. The one-way valve of claim 1, wherein of the valve seat (100) and the valve cover (200), the material of one provided with the ring-shaped groove (210) is light-transmitting plastic, and the material of the other one is non-light-transmitting plastic, the valve seat (100) and the valve cover (200) are welded and connected between the ring-shaped boss (110) and the ring-shaped groove (210) by using a laser welding process, so that the end portion of the ring-shaped boss (110) facing the ring-shaped groove (210) is partially melted during the welding process to form the welding mark.

3. The one-way valve of claim 1, wherein, the ring-shaped boss (110) has a welding end portion (111) facing the valve cover (200); the welding end portion (111) is fitted with the bottom wall (2103) of the ring-shaped groove (210); wherein the welding end portion (111) can act as an electrode, and the welding end portion (111) is melted and bonded with the bottom wall (2103) of the ring-shaped groove (210) during welding.

4. The one-way valve of claim 1, wherein the ring-shaped boss (110) has a welding end portion (111) facing the valve cover (200), when the ring-shaped boss (110) is not welded, the welding end portion (111) has a gap (G1) between the two side walls of the ring-shaped groove (210); wherein the welding end portion (111) is melted to fill at least part of the gap (G1) during welding.

5. The one-way valve of claim 4, wherein: when the ring-shaped boss (110) is not welded, the width of the welding end portion (111) in the radial direction is smaller than the width of other parts of the ring-shaped boss (110) in the radial direction, so that when the ring-shaped boss (110) is assembled in the ring-shaped groove (210), the welding end portion (111) has a gap (G1) between the two side walls of the ring-shaped groove (210); wherein the welding end portion (111) is melted to fill at least part of the gap (G1) during welding; or The groove width of the annular groove (210) corresponding to the welded end portion (111) is greater than the groove width of the annular groove (210) corresponding to other parts of the annular boss (110), so that when the annular boss (110) is assembled in the annular groove (210), the welded end portion (111) has a gap (G1) between the two side walls of the annular groove (210); wherein the welded end portion (111) is melted when welded to fill at least part of the gap (G1).

6. The one-way valve of claim 1, wherein, The annular boss (110) has an inner annular surface (1101) and an outer annular surface (1102), and the annular groove (210) has an inner side groove wall (2101) facing the inner annular surface (1101) and an outer side groove wall (2102) facing the outer annular surface (1102); wherein, in the axial direction, the height of the inner side groove wall (2101) is greater than the height of the outer side groove wall (2102), so that the annular groove (210) forms a protruding portion (220) further protruding towards the valve seat (100) at the inner side groove wall (2101).

7. The one-way valve of claim 1, wherein The annular boss (110) has an inner annular surface (1101) and an outer annular surface (1102), and the annular groove (210) has an inner side groove wall (2101) facing the inner annular surface (1101) and an outer side groove wall (2102) facing the outer annular surface (1102); wherein, the inner annular surface (1101) and the inner side groove wall (2101) are in interference fit.

8. The one-way valve of claim 1, wherein, The annular groove (210) is arranged on the end face of the second end portion of the valve cover (200); wherein, the valve cover (200) comprises a body portion (201) and an annular assembly portion (202), the annular assembly portion (202) is arranged on the periphery of the body portion (201) near one end of the valve seat (100), and the annular groove (210) is arranged on the annular assembly portion (202).

9. The one-way valve of claim 8, wherein, In the axial direction, the ratio of the groove depth (H1) of the annular groove (210) in the thickness (H2) of the annular assembly portion (202) is 1 / 2-3 / 4.

10. The one-way valve of claim 1, wherein, The valve cover (200) has a second cavity (203) therein, and the second cavity (203) is open at the second end portion; wherein, the valve cover (200) is manufactured by injection molding process, the annular groove (210) is arranged on the end face of the second end portion of the valve cover (200), and the end face is further provided with a process groove (230), which is located between the annular groove (210) and the second cavity (203) in an interval.

11. The one-way valve of claim 10, wherein, The process groove (230) is annular, and the process groove (230) surrounds the second cavity (203).

12. The one-way valve of claim 10, wherein, A plurality of reinforcing ribs (231) are arranged in the process groove (230), and the plurality of reinforcing ribs (231) are arranged in an interval along the circumference of the process groove (230) to divide the process groove (230) into a plurality of sub-groove bodies.

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