One-way valve
By designing annular grooves and rib structures in the check valve, the problem of unstable valve core operation caused by valve seat deformation was solved, achieving stable valve core operation and improved dimensional accuracy.
Patent Information
- Authority / Receiving Office
- WO · WO
- Patent Type
- Applications
- Current Assignee / Owner
- ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO LTD
- Filing Date
- 2025-11-10
- Publication Date
- 2026-05-15
AI Technical Summary
Existing check valves are prone to deformation during the connection between the valve cover and the valve seat, which prevents the valve core from running stably into the sink and affects the flow capacity.
The valve cover and valve seat are designed with annular grooves and annular ribs. The annular ribs limit the annular end, preventing valve seat deformation and ensuring smooth valve core operation.
This effectively prevents valve seat deformation, ensures stable valve core operation, reduces the radial dimension and machining difficulty of the check valve, and improves overall dimensional accuracy and product yield.
Smart Images
Figure CN2025133793_15052026_PF_FP_ABST
Abstract
Description
one-way valve
[0001] This disclosure claims priority to Chinese patent application No. 202422730420.7, filed on November 8, 2024, entitled “One-way valve”, the entire contents of which are incorporated herein by reference. Technical Field
[0002] This disclosure relates to a one-way valve. Background Technology
[0003] In existing designs of check valves, they typically consist of a valve cover, valve seat, and valve core. To reduce the size of the check valve for customers while ensuring valve core stroke and flow capacity, the valve cover is designed with a recessed structure. When the valve core is at its maximum stroke, part of it can be located within the recess. However, when the valve cover and valve seat are made of materials such as plastic, the valve seat is prone to deformation during the fixing process. A deformed valve seat can affect the piston stroke, causing the valve core to not stably reach the recess.
[0004] How to prevent the valve core from failing to move stably into the sink groove due to valve seat deformation during the connection process between the valve cover and the valve seat has become an important issue that needs to be addressed in related fields. Summary of the Invention
[0005] A primary objective of this disclosure is to overcome at least one of the deficiencies of the prior art described above, and to provide a one-way valve that can avoid deformation during the fixing of the valve seat and valve cover and has a smaller size.
[0006] To achieve the above objectives, the present disclosure adopts the following technical solution:
[0007] According to one aspect of this disclosure, a one-way valve is provided, wherein: the one-way valve includes a valve body and a valve core; the valve body includes a valve seat and a valve cover; the space enclosed by the valve seat and the valve cover is a valve cavity; the valve core is movable in the valve cavity along the axial direction of the one-way valve to open or close the valve port of the valve cavity; the valve cover is further provided with a groove at one end facing the valve seat, and at least a portion of the valve core is movable from inside the valve seat into the groove; the valve seat is an annular end at one end facing the valve cover, and the valve cover is provided with an annular groove at one end facing the valve seat; the annular end is accommodated in and fixed by the annular groove; the annular grooves are arranged at intervals around the outer periphery of the groove, such that the portion of the valve cover located between the groove and the annular groove forms an annular rib.
[0008] According to one embodiment of this disclosure, the annular end is received in the annular groove and press-fitted.
[0009] According to one embodiment of this disclosure, the valve cover has a second cavity communicating with the settling groove, the inner diameter of the settling groove is larger than the inner diameter of the second cavity, so that the portion of the bottom of the settling groove not occupied by the second cavity forms a limiting step; the valve core includes a body part and a limiting part, the limiting part is disposed at the end of the body part facing the valve port; the body part moves axially along the one-way valve within the second cavity; the limiting part can move from inside the valve seat into the settling groove, and is blocked from entering the second cavity by the limiting step.
[0010] According to one embodiment of this disclosure, the valve seat has a first cavity inside, and the cavity wall of the first cavity adjacent to one end of the valve cover has an annular receiving groove. The annular rib is received in the annular receiving groove, and the annular receiving groove has a first groove wall facing the outer peripheral surface of the annular rib. The first groove wall presses against the outer peripheral surface of the annular rib.
[0011] According to one embodiment of this disclosure, the annular rib has an end face facing the valve seat, and the annular receiving groove has a second groove wall facing the valve cover, with a gap between the second groove wall and the end face of the annular rib.
[0012] According to one embodiment of this disclosure, the thickness of the annular rib is equal to the depth of the annular receiving groove along the radial direction of the one-way valve.
[0013] According to one embodiment of this disclosure, the valve seat is made of plastic and is formed by injection molding.
[0014] According to one embodiment of this disclosure, along the axial direction of the one-way valve, the bottom of the sink groove is farther from the valve port than the bottom of the annular groove.
[0015] According to one embodiment of this disclosure, along the axial direction of the one-way valve, the length of the outer groove wall of the annular groove is greater than the length of its inner groove wall, and the outer peripheral surface of the annular rib defines the inner groove wall.
[0016] According to one embodiment of this disclosure, the valve cover has an annular outer peripheral wall at one end facing the valve seat, the outer peripheral wall being arranged around the annular ribs at intervals, thereby forming an annular groove between the outer peripheral wall and the annular ribs; wherein the thickness of the annular ribs is greater than the thickness of the outer peripheral wall.
[0017] As can be seen from the above technical solution, the advantages and positive effects of the one-way valve proposed in this disclosure are as follows:
[0018] The one-way valve disclosed herein includes a valve body and a valve core. The valve body includes a valve seat and a valve cover, with the space enclosed by the valve seat and valve cover forming a valve cavity. The valve core can open or close the valve port. The valve cover has a groove at the end facing the valve seat, allowing at least a portion of the valve core to move from inside the valve seat into the groove. The valve seat has an annular end facing the valve cover, and the valve cover has an annular groove at the end facing the valve seat. The annular end is accommodated and fixed in the annular groove, and the portion of the valve cover between the groove and the annular groove forms an annular rib. During use, the valve core reciprocates between the valve seat and the groove of the valve cover. An annular rib is formed between the groove and the annular groove. Accordingly, when the valve body and valve cover are assembled and fixed, the annular end is confined within the annular groove. The annular rib isolates the annular end from the valve core, limiting the annular end and preventing deformation of the side of the annular end facing the valve core, thus avoiding deformation of the annular end from affecting the valve core's movement into the groove. Attached Figure Description
[0019] The above and other features and advantages of this disclosure will become more apparent from a detailed description of exemplary embodiments thereof with reference to the accompanying drawings.
[0020] Figure 1 is a three-dimensional structural schematic diagram of a one-way valve according to an exemplary embodiment;
[0021] Figure 2 is an axonal sectional view of the check valve shown in Figure 1 in one of its states;
[0022] Figure 3 is an axonal sectional view of the check valve shown in Figure 1 in another state;
[0023] Figure 4 is an enlarged schematic diagram of part A in Figure 2;
[0024] Figure 5 is a three-dimensional exploded view of the one-way valve shown in Figure 1;
[0025] Figure 6 is a three-dimensional structural diagram of the valve seat shown in Figure 5;
[0026] Figure 7 is a three-dimensional structural diagram of the valve cover shown in Figure 5;
[0027] Figure 8 is a three-dimensional structural diagram of the valve core shown in Figure 5.
[0028] The reference numerals in the attached drawings are explained as follows: 100. Valve seat; 101. First cavity; 102. Valve port; 110. Annular end; 120. Annular receiving groove; 200. Valve cover; 201. Second cavity; 210. Slot; 211. Limiting step; 220. Annular groove; 2201. Outer groove wall; 2202. Inner groove wall; 230. Annular rib; 240. Outer peripheral wall; 300. Valve core; 310. Body part; 320. Limiting part; D1. Thickness; D2. Thickness; G. Clearance. Detailed Implementation
[0029] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Although relative terms such as “upper” and “lower” are used in this specification to describe the relative relationship of one component of an icon to another, these terms are used only for convenience, such as according to the orientation of the examples described in the accompanying drawings. It will be understood that if the device of the icon is flipped so that it is upside down, the component described as “upper” will become the component described as “lower.” Other relative terms such as “top” and “bottom” are used with similar meanings. When a structure is “upper” than another structure, it may mean that the structure is integrally formed on the other structure, or that the structure is “directly” disposed on the other structure, or that the structure is “indirectly” disposed on the other structure through another structure.
[0030] The terms “a,” “one,” “the,” and “the” are used to indicate the existence of one or more elements / components / etc.; the terms “including” and “having” are used to indicate an open-ended inclusion and to mean that there may be other elements / components / etc. in addition to the listed elements / components / etc.; the terms “first,” “second,” etc. are used only as markers and are not a limitation on the number of objects.
[0031] Referring to Figure 1, a three-dimensional structural schematic diagram of the one-way valve proposed in this disclosure is shown. In this exemplary embodiment, the one-way valve proposed in this disclosure is illustrated as a valve applied to a refrigeration system. It will be readily understood by those skilled in the art that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to apply the relevant designs of this disclosure to other application scenarios, and these changes are still within the scope of the principle of the one-way valve proposed in this disclosure.
[0032] As shown in Figure 1, in one embodiment of this disclosure, the one-way valve includes a valve body and a valve core 300. The valve body has a valve cavity inside, and includes a valve seat 100 and a valve cover 200. The space enclosed by the valve seat 100 and the valve cover 200 is the valve cavity, which has a valve port 102 (as shown in Figure 2). For example, the valve cavity can be formed by at least a first cavity 101 of the valve seat 100, a second cavity 201 of the valve cover 200, and a recess 210 of the valve cover 200. The valve core 300 is disposed in the valve cavity and can move axially along the one-way valve. The valve core 300 is used to open or close the valve port 102. Referring to Figures 2 through 8, Figures 2 and 3 respectively show representative axial sectional views of the check valve in two different states. Figure 2 specifically shows the sectional structure when the valve core 300 is closed at valve port 102, and Figure 3 specifically shows the sectional structure when the valve core 300 is fully open. Figure 4 shows a representative enlarged schematic diagram of part A in Figure 2. Figure 5 shows a representative exploded perspective view of the check valve. Figure 6 shows a representative perspective view of the valve seat 100. Figure 7 shows a representative perspective view of the valve cover 200. Figure 8 shows a representative perspective view of the valve core 300. The structure, connection method, and functional relationship of the main components of the check valve proposed in this disclosure will be described in detail below with reference to the above figures.
[0033] As shown in Figures 1 to 8, in one embodiment of this disclosure, the valve cover 200 facing the valve seat 100 is further provided with a recess 210, and at least a portion of the valve core 300 can move from inside the valve seat 100 into the recess 210. The end of the valve seat 100 facing the valve cover 200 is an annular end 110, and the end of the valve cover 200 facing the valve seat 100 is provided with an annular groove 220, the annular end 110 being accommodated in and fixed within the annular groove 220. The annular grooves 220 are arranged at intervals around the outer periphery of the recess 210, so that the portion of the valve cover 200 located between the recess 210 and the annular groove 220 forms an annular rib 230. During use, the valve core 300 reciprocates between the valve seat 100 and the groove 210 of the valve cover 200. An annular rib 230 is formed between the groove 210 and the annular groove 220. Accordingly, when the valve body and the valve cover 200 are assembled and fixed, the annular end 110 is limited in the annular groove 220. The annular rib 230 can isolate the annular end 110 from the valve core 300 (e.g., the limiting part 320). The annular rib 230 limits the annular end 110, and the side of the annular end 110 facing the valve core 300 cannot be deformed, thus preventing the deformation of the annular end 110 from affecting the operation of the valve core 300 to the groove 210.
[0034] In one embodiment of this disclosure, the annular end 110 is accommodated in the annular groove 220 and riveted together. Since this disclosure can ensure that the outer peripheral surface of the annular rib 230 and the inner peripheral surface of the annular end 110 are always pressed together, it can prevent the valve body from being deformed by external forces during the riveting process, and avoid damage to the one-way valve structure or assembly failure.
[0035] As shown in Figure 4, in one embodiment of this disclosure, the thickness D1 of the annular rib 230 can be 0.5mm to 1.2mm, such as 0.5mm, 0.6mm, 0.8mm, 1mm, 1.2mm, etc., specifically, for example, 0.75mm. Through the above structural design, this disclosure can avoid the annular rib 230 having insufficient support for the annular end 110 of the valve seat 100 due to an excessively small thickness D1, while also avoiding the one-way valve having an excessively large radial dimension due to an excessively large thickness D1.
[0036] In one embodiment of this disclosure, as shown in Figures 2-3, the valve cover 200 has a second cavity 201 communicating with the recess 210. The inner diameter of the recess 210 is larger than the inner diameter of the second cavity 201, so that the portion of the bottom of the recess 210 not occupied by the second cavity 201 forms a limiting step 211. The valve core 300 includes a body portion 310 and a limiting portion 320, with the limiting portion 320 disposed at the end of the body portion 310 facing the valve port 102. The second cavity 201 and the recess 210 are respectively used to accommodate the body portion 310 and the limiting portion 320, so that the limiting step 211 and the side of the limiting portion 320 facing away from the valve port 102 are mutually limitingly engaged. The body portion 310 can move axially along the one-way valve within the second cavity 201; the limiting portion 320 can move from inside the valve seat 100 into the recess 210 and is blocked from entering the second cavity 201 by the limiting step 211. Through the above structural design, this disclosure can ensure that there is a gap between the groove wall of the sink 210 and the limiting part 320, thereby avoiding friction between the valve core 300 and the groove wall of the sink 210 when the valve core 300 moves, and ensuring smooth movement of the valve core 300 in the valve cavity.
[0037] As shown in Figures 4 to 6, in one embodiment of this disclosure, a first cavity 101 is provided inside the valve seat 100. The cavity wall of the first cavity 101 adjacent to one end of the valve cover 200 can be provided with an annular receiving groove 120, in which the annular rib 230 can be accommodated. The annular receiving groove 120 has a first groove wall facing the outer peripheral surface of the annular rib 230, which presses against the outer peripheral surface of the annular rib 230. This first groove wall is the inner peripheral surface of the annular end 110. Through the above structural design, this disclosure can utilize the annular receiving groove 120 to accommodate the annular rib 230, which is beneficial for further reducing the radial dimensions of the check valve.
[0038] As shown in Figure 4, based on the structural design of the annular rib 230 being accommodated in the annular receiving groove 120, in one embodiment of this disclosure, the annular rib 230 has an end face facing the valve seat 100, and the annular receiving groove 120 has a second groove wall facing the valve cover 200. A gap G can exist between the second groove wall and the end face of the annular rib 230. Through this structural design, when the valve seat 100 and the valve cover 200 are fixed, this disclosure avoids contact between the second groove wall and the end face of the annular rib 230, ensuring the assembly effect of the annular end 110 and the annular groove 220. Specifically, it ensures that the end of the annular end 110 facing the valve cover 200 is riveted against the bottom of the annular groove 220.
[0039] As shown in Figure 4, based on the structural design of the annular rib 230 being accommodated in the annular receiving groove 120, in one embodiment of this disclosure, the thickness D1 of the annular rib 230 and the groove depth of the annular receiving groove 120 can be equal along the radial direction of the one-way valve. Through this structural design, since the first groove wall of the annular receiving groove 120 presses against the outer peripheral surface of the annular rib 230, this disclosure can achieve that the inner peripheral surface of the annular rib 230 is flush with the portion of the cavity wall of the first cavity 101 where the annular receiving groove 120 is not formed.
[0040] In one embodiment of this disclosure, the valve seat 100 can be made of plastic and is formed using injection molding. However, existing injection molding solutions suffer from higher costs due to their longer overall dimensions, and the longer dimensions also result in noticeable draft angles on the valve cavity walls (e.g., the walls of the first cavity 101), leading to lower overall dimensional accuracy. In contrast, this disclosure significantly reduces the axial dimension compared to existing non-slotted solutions, thus improving the overall dimensional accuracy of the valve seat 100 when formed using injection molding.
[0041] Furthermore, when the cavity wall of the first cavity 101 is provided with an annular receiving groove 120, when processing the valve seat 100, this disclosure only needs to control the dimensional accuracy of the part of the cavity wall of the first cavity 101 that mates with the valve cover 200 (e.g., the first groove wall of the annular receiving groove 120), without needing to precisely control the dimensions of the cavity wall of the entire area of the first cavity 101, thereby significantly reducing the difficulty of the injection molding process, reducing the cost of the injection molding process, and helping to improve the product yield.
[0042] As shown in Figures 2 and 4, in one embodiment of this disclosure, along the axial direction of the one-way valve, the bottom of the groove 210 can be farther from the valve port 102 than the bottom of the annular groove 220. Through the above structural design, since the groove 210 needs to ensure the total stroke of the valve core 300, while the annular groove 220 is only for assembly and is unrelated to the total stroke, the depth of the annular groove 220 does not need to be greater than or equal to the depth of the groove 210, as long as it can satisfy the need to fix the valve seat 100 and the valve cover 200. Therefore, this disclosure uses an annular groove 220 with a smaller depth than the groove 210, which can reduce the processing difficulty of the components.
[0043] As shown in Figures 2 and 4, in one embodiment of this disclosure, along the axial direction of the one-way valve, the length of the outer groove wall 2201 of the annular groove 220 is greater than the length of its inner groove wall 2202, and the outer circumferential surface of the annular rib 230 defines the inner groove wall 2202. In other words, the end of the outer groove wall 2201 of the annular groove 220 facing the valve seat 100 is closer to the valve port 102 than the end of the inner groove wall 2202 facing the valve seat 100. Through the above structural design, this disclosure facilitates the riveting and bending of the annular end 110 in the annular groove 220. In some embodiments, the length of the outer groove wall 2201 of the annular groove 220 may also be equal to or less than the length of its inner groove wall 2202, and is not limited to this embodiment.
[0044] As shown in Figures 2 and 4, in one embodiment of this disclosure, the valve cover 200 has an annular outer peripheral wall 240 at the end facing the valve seat 100. This outer peripheral wall 240 is arranged around the annular ribs 230 at intervals, forming an annular groove 220 between the outer peripheral wall 240 and the annular ribs 230. In other words, the inner peripheral surface of the outer peripheral wall 240 is the outer groove wall 2201 of the annular groove 220, and the outer peripheral surface of the annular ribs 230 is the inner groove wall 2202 of the annular groove 220. Based on this, the thickness D1 of the annular ribs 230 can be greater than the thickness D2 of the outer peripheral wall 240. Through the above structural design, this disclosure designs the thickness D1 of the annular ribs 230 to be relatively large, ensuring that the annular ribs 230 have sufficient strength, and that the thickness of the outer peripheral wall 240 meets the functional requirement of bending during riveting.
[0045] It should be noted that the check valves shown in the accompanying drawings and described in this specification are merely a few examples among many check valves capable of employing the principles of this disclosure. It should be clearly understood that the principles of this disclosure are by no means limited to any detail or component of the check valves shown in the accompanying drawings or described in this specification.
[0046] In summary, the one-way valve disclosed herein includes a valve body and a valve core 300. The valve body includes a valve seat 100 and a valve cover 200. The space enclosed by the valve seat 100 and the valve cover 200 is a valve cavity. The valve core 300 can open or close the valve port 102. The valve core 300 includes a body portion 310 and a limiting portion 320. The limiting portion 320 is disposed at the end of the body portion 310 facing the valve port 102, and the outer diameter of the limiting portion 320 is larger than the outer diameter of the body portion 310. The valve cover 200 has a groove 210 at the end facing the valve seat 100. At least a portion of the valve core 300 can be opened or closed by the valve seat 100. The valve seat 100 moves into the settling groove 210; the second cavity 201 and the settling groove 210 are respectively used to accommodate the main body 310 and the limiting part 320, so that the limiting step 211 and the limiting part 320 are limited to the side facing away from the valve port 102; the valve seat 100 facing the valve cover 200 has an annular end 110, and the valve cover 200 facing the valve seat 100 has an annular groove 220. The annular end 110 is accommodated in the annular groove 220 and fixed. The part of the valve cover 200 located between the settling groove 210 and the annular groove 220 forms an annular rib 230. During use, the valve core 300 reciprocates between the valve seat 100 and the groove 210 of the valve cover 200. An annular rib 230 is formed between the groove 210 and the annular groove 220. Accordingly, when the valve body and the valve cover 200 are assembled and fixed, the annular end 110 is limited in the annular groove 220. The annular rib 230 can isolate the annular end 110 from the valve core 300 (e.g., the limiting part 320). The annular rib 230 limits the annular end 110, and the side of the annular end 110 facing the valve core 300 cannot be deformed, thus preventing the deformation of the annular end 110 from affecting the operation of the valve core 300 to the groove 210.
[0047] It should be understood that this disclosure is not limited to the detailed structure and arrangement of the components presented in this specification. This disclosure is capable of other embodiments and can be implemented and performed in various ways. The foregoing variations and modifications fall within the scope of this disclosure. It should be understood that this disclosure, as disclosed and defined in this specification, extends to all alternative combinations of two or more individual features mentioned or apparent in the text and / or drawings. All these different combinations constitute multiple alternative aspects of this disclosure. The embodiments described in this specification illustrate the best known mode for implementing this disclosure and will enable those skilled in the art to utilize this disclosure.
Claims
1. A one-way valve, characterized in that: The one-way valve includes a valve body and a valve core (300). The valve body includes a valve seat (100) and a valve cover (200). The space enclosed by the valve seat (100) and the valve cover (200) is a valve cavity. The valve core (300) can move along the axial direction of the one-way valve in the valve cavity to open or close the valve port (102) of the valve cavity. The valve cover (200) is provided with a recess (210) at one end facing the valve seat (100), and at least part of the valve core (300) can move from inside the valve seat (100) into the recess (210); The valve seat (100) has an annular end (110) facing the valve cover (200), and the valve cover (200) has an annular groove (220) facing the valve seat (100). The annular end (110) is accommodated in the annular groove (220) and fixed. The annular grooves (220) are arranged around the outer periphery of the groove (210) at intervals, so that the part of the valve cover (200) located between the groove (210) and the annular groove (220) forms an annular rib (230).
2. The one-way valve according to claim 1, characterized in that, The annular end (110) is accommodated in the annular groove (220) and assembled by press riveting.
3. The one-way valve according to claim 1, characterized in that, The valve cover (200) is provided with a second cavity (201) communicating with the sink (210). The inner diameter of the sink (210) is larger than the inner diameter of the second cavity (201) so that the part of the bottom of the sink (210) not occupied by the second cavity (201) forms a limiting step (211). The valve core (300) includes a body part (310) and a limiting part (320). The limiting part (320) is disposed at the end of the body part (310) facing the valve port (102). The body part (310) moves along the axial direction of the one-way valve in the second cavity (201). The limiting part (320) can move from inside the valve seat (100) into the sink (210) and is blocked by the limiting step (211) from entering the second cavity (201).
4. The one-way valve according to claim 1, characterized in that, The valve seat (100) has a first cavity (101) inside. The cavity wall of the first cavity (101) adjacent to one end of the valve cover (200) is provided with an annular receiving groove (120). The annular rib (230) is accommodated in the annular receiving groove (120). The annular receiving groove (120) has a first groove wall facing the outer peripheral surface of the annular rib (230). The first groove wall presses against the outer peripheral surface of the annular rib (230).
5. The one-way valve according to claim 4, characterized in that, The annular rib (230) has an end face facing the valve seat (100), and the annular receiving groove (120) has a second groove wall facing the valve cover (200), with a gap (G) between the second groove wall and the end face of the annular rib (230).
6. The one-way valve according to claim 4, characterized in that, Along the radial direction of the one-way valve, the thickness (D1) of the annular rib (230) is equal to the groove depth of the annular receiving groove (120).
7. The one-way valve according to claim 1, characterized in that, The valve seat (100) is made of plastic and is formed by injection molding.
8. The one-way valve according to claim 1, characterized in that, Along the axial direction of the one-way valve, the bottom of the groove (210) is farther from the valve port (102) than the bottom of the annular groove (220).
9. The one-way valve according to claim 1, characterized in that, Along the axial direction of the one-way valve, the length of the outer groove wall (2201) of the annular groove (220) is greater than the length of the inner groove wall (2202) of the annular groove (220), and the outer peripheral surface of the annular rib (230) is the inner groove wall (2202).
10. The one-way valve according to claim 1, characterized in that, The valve cover (200) has an annular outer peripheral wall (240) at one end facing the valve seat (100). The outer peripheral wall (240) is arranged around the annular rib (230) at intervals, so that the annular groove (220) is formed between the outer peripheral wall (240) and the annular rib (230). The thickness (D1) of the annular rib (230) is greater than the thickness (D2) of the outer peripheral wall (240).