Throttling assembly and throttling valve

Abstract

The throttling assembly comprises a valve port piece, a valve needle and a valve bonnet, the valve port piece is provided with a valve port for fluid to flow in, the head section of the valve needle penetrates through the valve port, and the valve bonnet is connected with the valve needle in a sealing mode under the state that the head section of the valve needle penetrates through the valve port. A first overflowing gap allowing fluid to flow through is formed between the outer circumferential face of the valve needle head section and the inner circumferential face of the valve port, the middle section of the valve needle is sleeved with the valve bonnet, the valve bonnet is provided with a flow gathering structure, and the flow gathering structure is communicated with the valve port and used for allowing the fluid flowing through the first overflowing gap to flow in and gather so that the fluid can push the valve bonnet to be away from the valve port piece. The valve needle is driven to be away from the valve port. According to the throttling assembly and the throttling valve, the valve bonnet and the valve needle can be easily pushed by fluid, so that the hysteresis quality of fluid flow control can be reduced, and the sensitivity of fluid flow control is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a throttling component and a throttle valve. Background Art

[0002] A throttle valve controls fluid flow by varying the throttle cross-section or length. It has an inlet for fluid flow and an outlet for fluid flow out. Fluid flowing into the throttle valve pushes the valve cap and needle away from the inlet, increasing the throttle cross-section or length. As the flow rate of fluid flowing into the throttle valve increases, the distance the bonnet and needle are pushed away from the inlet increases, thereby increasing the flow rate of fluid flowing through the throttle valve.

[0003] However, in the prior art, the valve cap and the valve needle are difficult to be pushed by the fluid, resulting in a large hysteresis and poor sensitivity of the throttle valve in controlling the fluid flow. Utility Model Content

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art, and proposes a throttling assembly and a throttle valve, which can make the valve cap and the valve needle easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control.

[0005] In order to achieve the purpose of the present invention, a throttling assembly is provided, including a valve port member, a valve needle and a valve bonnet, the valve port member is provided with a valve port for fluid to flow in, the head section of the valve needle passes through the valve port, and when the head section of the valve needle passes through the valve port, a first flow gap for fluid to flow through is provided between the outer peripheral surface of the valve needle head section and the inner peripheral surface of the valve port, the valve bonnet is sleeved outside the middle section of the valve needle, and the valve bonnet is provided with a flow gathering structure, the flow gathering structure is communicated with the valve port, and is used for the fluid flowing through the first flow gap to flow in and gather, so as to push the valve bonnet away from the valve port member through the fluid, thereby driving the valve needle away from the valve port.

[0006] Optionally, the flow-concentrating structure includes a flow-concentrating groove, and a notch of the flow-concentrating groove faces the valve port member.

[0007] Optionally, the notch of the flow-gathering groove is arranged opposite to the valve port, and the middle section of the valve needle is located in the flow-gathering groove.

[0008] Optionally, the middle section of the valve needle is provided with a first limiting portion and a second limiting portion, the first limiting portion abuts against the end surface of the valve mouth member facing the flow-gathering groove, and the second limiting portion abuts against the bottom of the flow-gathering groove.

[0009] Optionally, the radial dimension of the valve needle head section gradually increases from one end of the valve needle head section away from the valve needle middle section to one end close to the valve needle middle section, and the radial dimension of the valve port is equal from one end of the valve port away from the valve cap to one end close to the valve cap, and the radial dimension of the valve port is greater than the radial dimension of the valve needle head section.

[0010] Optionally, the throttling assembly also includes a shell, the valve cap is arranged inside the shell so as to be movable along the shell, and a second flow gap is provided between the outer circumferential surface of the valve cap and the inner circumferential surface of the shell for the fluid flowing through the first flow gap to flow through, and the shell is provided with an outlet for the fluid flowing through the second flow gap to flow out.

[0011] Optionally, the end wall of the housing opposite to the valve port member is provided with the outflow port, and the number of the outflow ports is multiple, and the multiple outflow ports are spaced apart in the circumferential direction of the housing.

[0012] Optionally, an outer peripheral surface of the valve cap has a flow plane, and the space between the flow plane and the inner peripheral surface of the shell forms the second flow gap.

[0013] Optionally, the valve bonnet is provided with a limiting structure, and the limiting structure cooperates with the inner circumferential surface of the outer shell to limit the movement of the valve bonnet in the radial direction of the outer shell.

[0014] Optionally, the outer circumferential surface of the valve bonnet has two radially opposite sides thereof with limiting planes respectively, and limiting edges are formed on both sides of the limiting planes respectively, and the limiting edges are abutted against the inner circumferential surface of the outer shell, and the limiting structure includes a plurality of the limiting edges.

[0015] Optionally, the valve cap is provided with an overflow structure, and the first overflow gap is connected to the second overflow gap through the overflow structure.

[0016] Optionally, the overflow structure includes an overflow groove or an overflow convex portion, the overflow groove is arranged at the end of the valve bonnet close to the valve mouth member, and the notch of the overflow groove faces the valve mouth member, the overflow groove is respectively connected with the flow gathering structure and the second overflow gap, the overflow convex portion is arranged on the end face of the valve bonnet facing the valve mouth member, and is abutted against the end face of the valve mouth member facing the valve bonnet, and the gaps between the two opposite end faces of the valve bonnet and the valve mouth member are respectively connected with the first overflow gap and the second overflow gap.

[0017] Optionally, the throttling assembly further includes a reset component, which is connected to the valve bonnet and the housing respectively, and is used to provide a force for the valve bonnet to approach the valve port member.

[0018] Optionally, the reset component includes a compression spring, which is sleeved outside the middle section of the valve needle, and whose two ends are respectively connected to the surface of the valve cap facing away from the valve mouth piece and the surface of the housing opposite to the valve mouth piece.

[0019] Optionally, the valve needle also has a tail section, and the tail section, middle section and head section of the valve needle are connected in sequence. The end wall of the shell opposite to the valve mouth member is provided with a limiting hole, and the tail section of the valve needle can move through the limiting hole along the axial direction of the limiting hole. The limiting hole is used to limit the movement of the tail section of the valve needle in the radial direction of the limiting hole.

[0020] Optionally, the valve mouth member is arranged in the shell.

[0021] The utility model also provides a throttle valve, comprising a valve housing and the throttle assembly provided by the utility model, wherein the throttle assembly is arranged in the valve housing.

[0022] Optionally, the throttle valve includes a plurality of throttle assemblies, which are arranged in the valve housing at intervals in the circumferential direction of the valve housing, and the direction of at least one throttle assembly is opposite to the direction of the remaining throttle assemblies; or, the throttle valve includes a one-way assembly and at least one throttle assembly, the one-way assembly is used for allowing fluid to flow in and out in a single direction, the one-way assembly and the throttle assembly are arranged in the valve housing at intervals in the circumferential direction of the valve housing, and the direction of the throttle assembly is opposite to the direction of the one-way assembly.

[0023] Optionally, at least part of one throttling assembly overlaps with at least part of another throttling assembly facing in the opposite direction in the radial direction of the valve housing, or at least part of the throttling assembly overlaps with at least part of the one-way assembly in the radial direction of the valve housing.

[0024] Optionally, the throttle valve further includes an external shell, and the external shells are respectively provided at both ends of the valve shell, and the radial dimension of the valve shell is larger than the radial dimension of the external shell.

[0025] Optionally, the throttle valve further includes a valve seat, which is connected to the throttle assembly and the valve housing, respectively, and is used to fix the throttle assembly in the valve housing.

[0026] Optionally, the valve seat is provided with a connecting protrusion, the valve housing is provided with an assembly hole, and the connecting protrusion is passed through the assembly hole; or, the valve seat is provided with a connecting recess, the valve housing is provided with an assembly recess, and the assembly recess is recessed into the connecting recess.

[0027] The utility model has the following beneficial effects:

[0028] The throttling assembly provided by the utility model can make the fluid flowing through the first flow gap flow into the flow gathering structure and gather in the flow gathering structure by arranging a flow gathering structure connected with the valve port on the valve bonnet, thereby increasing the force exerted on the valve bonnet by the fluid. That is to say, the force exerted on the valve bonnet by the fluid gathered in the flow gathering structure is larger than the force exerted on the valve bonnet by the fluid in the prior art. Then, the valve bonnet is pushed away from the valve port part by gathering the fluid in the flow gathering structure, thereby driving the valve needle away from the valve port, which can make the valve bonnet and the valve needle easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control.

[0029] The throttle valve provided by the present invention, with the help of the throttle assembly provided by the present invention, can make the valve cap and the valve needle easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic structural diagram of a throttling assembly provided in an embodiment of the present utility model;

[0031] Figure 2 A schematic structural diagram of a throttle assembly in a closed state in one direction provided by an embodiment of the present utility model;

[0032] Figure 3 A schematic structural diagram of another direction of the throttle assembly provided by an embodiment of the present utility model in a closed state;

[0033] Figure 4 A schematic structural diagram of one direction of a throttle assembly provided by an embodiment of the present utility model in an open state;

[0034] Figure 5 A schematic structural diagram of another direction of the throttle assembly provided by an embodiment of the present utility model in an open state;

[0035] Figure 6 A structural schematic diagram of a throttling assembly provided in an embodiment of the utility model;

[0036] Figure 7 Another structural schematic diagram of a throttling assembly provided in an embodiment of the present utility model;

[0037] Figure 8 for Figure 3 Schematic diagram of the left view structure;

[0038] Figure 9 A schematic diagram of the three-dimensional structure of a throttling assembly in one direction provided by an embodiment of the utility model;

[0039] Figure 10A schematic diagram of the three-dimensional structure of the throttling assembly provided by an embodiment of the present utility model in another direction;

[0040] Figure 11 A schematic diagram of another structure of the throttling assembly provided in an embodiment of the present utility model;

[0041] Figure 12 A structural schematic diagram of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0042] Figure 13 Another structural schematic diagram of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0043] Figure 14 A structural schematic diagram of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0044] Figure 15 for Figure 14 A schematic diagram of a partially enlarged three-dimensional structure;

[0045] Figure 16 for Figure 15 Schematic diagram of the cross-sectional structure;

[0046] Figure 17 A schematic structural diagram of a valve seat and a housing provided in an embodiment of the present utility model;

[0047] Figure 18 A schematic diagram of another structure of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0048] Figure 19 A schematic diagram of another structure of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0049] Figure 20 A schematic diagram of another structure of a throttle assembly and a throttle valve provided in an embodiment of the present utility model;

[0050] Figure 21 A schematic diagram of another structure of the throttle assembly and the throttle valve provided in an embodiment of the present utility model;

[0051] Figure 22 A schematic structural diagram of the valve housing, external housing and external connector provided in an embodiment of the present utility model;

[0052] Figure 23 A schematic structural diagram of the valve housing, external housing, external connector and filter component provided in an embodiment of the present utility model;

[0053] Description of reference numerals:

[0054] 1-throttling assembly; 11-valve port; 111-valve port; 12-valve needle; 121-head section; 122-middle section; 123-tail section; 124-first limiting portion; 125-second limiting portion; 13-valve bonnet; 131-flow-gathering groove; 132-flow plane; 133-limiting plane; 134-limiting edge; 135-flow groove; 136-flow convex portion; 14-housing; 141-outlet; 142-limiting hole; 15-second flow gap; 16-compression spring; 2-throttle valve; 21-valve housing; 211-assembly recess; 22-external housing; 23-external connector; 24-filter component; 25-valve seat; 251-connecting convex portion; 3-one-way assembly. DETAILED DESCRIPTION

[0055] In order to enable those skilled in the art to better understand the technical solution of the present invention, the throttle assembly and the throttle valve provided by the present invention are described in detail below with reference to the accompanying drawings.

[0056] like Figures 1-11 As shown, an embodiment of the present invention provides a throttling assembly 1, comprising a valve port member 11, a valve needle 12 and a valve bonnet 13. The valve port member 11 is provided with a valve port 111 for fluid to flow in, and a head section 121 of the valve needle 12 passes through the valve port 111. When the head section 121 of the valve needle 12 passes through the valve port 111, a first flow gap for fluid to flow through is provided between the outer peripheral surface of the head section 121 of the valve needle 12 and the inner peripheral surface of the valve port 111. The valve bonnet 13 is sleeved on the outside of the middle section 122 of the valve needle 12, and the valve bonnet 13 is provided with a flow gathering structure, which is connected to the valve port 111 for fluid flowing through the first flow gap to flow in and gather, so as to push the valve bonnet 13 away from the valve port member 11 through the fluid, thereby driving the valve needle 12 away from the valve port 111.

[0057] The throttling assembly 1 provided by the embodiment of the present invention can make the fluid flowing through the first flow gap flow into the flow gathering structure and gather in the flow gathering structure by arranging a flow gathering structure connected with the valve port 111 on the valve bonnet 13, thereby increasing the force exerted by the fluid on the valve bonnet 13. That is to say, the force exerted on the valve bonnet 13 by the fluid gathered in the flow gathering structure is larger than the force exerted on the valve bonnet 13 by the fluid in the prior art. Then, the valve bonnet 13 is pushed away from the valve port 11 by gathering the fluid in the flow gathering structure, thereby driving the valve needle 12 away from the valve port 111. This can make the valve bonnet 13 and the valve needle 12 easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control.

[0058] In practical applications, the throttle assembly 1 can have multiple states, which may include a closed state and an open state. Figure 2 and Figure 3As shown, when the throttling assembly 1 is in the closed state, the head section 121 of the valve needle 12 can be completely inserted into the valve port 111. At this time, there is a first flow gap between the outer circumference of the head section 121 of the valve needle 12 and the inner circumference of the valve port 111 for the fluid to flow through. The fluid can flow through the first flow gap and flow into the throttling assembly 1. Part of the fluid flowing into the throttling assembly 1 can flow into the flow gathering structure, and the other part can flow out through the throttling assembly 1. In other words, the throttling assembly 1 can still have fluid flowing in and out in the closed state, and the fluid flowing into the flow gathering structure can be gathered in the flow gathering structure to drive the valve needle 12 away from the valve port 111 by pushing the valve cap 13 away from the valve port 11. In the process of the valve needle 12 moving away from the valve port 111, the head section 121 of the valve needle 12 can gradually withdraw from the valve port 111 until it completely withdraws from the valve port 111. In other words, the head section 121 of the valve needle 12 is not located in the valve port 111 at all. As shown Figure 4 and Figure 5 As shown, when the head section 121 of the valve needle 12 is not completely located in the valve port 111, the throttling assembly 1 can be in an open state. At this time, the fluid can flow directly through the valve port 111 into the throttling assembly 1, and a part of the fluid flowing through the valve port 111 into the throttling assembly 1 can flow into the flow gathering structure, and the other part can flow out through the throttling assembly 1. The fluid flowing into the flow gathering structure can be gathered in the flow gathering structure to continuously drive the valve needle 12 away from the valve port 111 by continuously pushing the valve cap 13 away from the valve port part 11, or maintain the distance between the valve cap 13 and the valve port part 11 to maintain the distance between the valve needle 12 and the valve port 111.

[0059] like Figure 1 、 Figure 6 and Figure 7 As shown, in one embodiment of the present invention, the flow converging structure may include a flow converging groove 131 , and the notch of the flow converging groove 131 faces the valve port member 11 .

[0060] By aligning the notch of the flow converging groove 131 toward the valve port 11 , the flow converging groove 131 can be communicated with the valve port 111 , so that the fluid flowing through the first flow gap can flow into the flow converging groove 131 and be gathered in the flow converging groove 131 .

[0061] like Figure 1-Figure 5 As shown, in one embodiment of the present invention, the notch of the flow-concentrating groove 131 can be arranged opposite to the valve port 111 , and a portion of the middle section 122 of the valve needle 12 is located in the flow-concentrating groove 131 .

[0062] Such a design is because the first flow gap is formed by the space between the outer peripheral surface of the head section 121 of the valve needle 12 and the inner peripheral surface of the valve port 111. Therefore, by arranging the notch of the flow focusing groove 131 relative to the valve port 111 and locating the part of the middle section 122 of the valve needle 12 in the flow focusing groove 131, the fluid flowing through the first flow gap can flow smoothly into the flow focusing groove 131.

[0063] like Figure 1-Figure 5 As shown, in one embodiment of the present invention, the middle section 122 of the valve needle 12 is provided with a first limiting portion 124 and a second limiting portion 125, the first limiting portion 124 is against the end face of the valve mouth member 11 facing the flow gathering groove 131, and the second limiting portion 125 is against the bottom of the flow gathering groove 131.

[0064] With the help of the first limiting portion 124 and the second limiting portion 125 , the relative positions of the valve needle 12 and the valve bonnet 13 can be limited when the valve bonnet 13 and the valve needle 12 approach or move away from the valve port 11 .

[0065] like Figure 1-Figure 5 As shown, in one embodiment of the present invention, the radial dimension of the head section 121 of the valve needle 12 can gradually increase from the end of the head section 121 of the valve needle 12 away from the middle section 122 of the valve needle 12 to the end close to the middle section 122 of the valve needle 12, and the radial dimension of the valve port 111 is equal from the end of the valve port 111 away from the valve cap 13 to the end close to the valve cap 13, and the radial dimension of the valve port 111 is greater than the radial dimension of the head section 121 of the valve needle 12.

[0066] By making the radial dimension of the valve port 111 equal to and larger than the radial dimension of the tip section 121 of the valve needle 12, a first flow gap for fluid to flow can be provided between the outer circumferential surface of the tip section 121 of the valve needle 12 and the inner circumferential surface of the valve port 111 when the tip section 121 of the valve needle 12 passes through the valve port 111. By gradually increasing the radial dimension of the tip section 121 of the valve needle 12 from the end away from the middle section 122 of the valve needle 12 to the end closer to the middle section 122 of the valve needle 12, interference between the tip section 121 of the valve needle 12 and the valve port member 11 can be avoided during the process from when the tip section 121 of the valve needle 12 is completely out of the valve port 111 to when the tip section 121 of the valve needle 12 penetrates the valve port 111, allowing the tip section 121 of the valve needle 12 to smoothly penetrate the valve port 111.

[0067] Optionally, the valve port 111 may be a conical port, and the head section 121 of the valve needle 12 may be conical.

[0068] like Figure 1-Figure 5As shown, in one embodiment of the present invention, the throttling assembly 1 may further include a housing 14, the valve cap 13 is arranged in the housing 14 so as to be movable axially along the housing 14, and a second flow gap 15 is provided between the outer circumferential surface of the valve cap 13 and the inner circumferential surface of the housing 14 for the fluid flowing through the first flow gap to flow through, and the housing 14 is provided with an outflow port 141 for the fluid flowing through the second flow gap 15 to flow out.

[0069] In actual use, the fluid flowing through the first flow gap flows into the housing 14, with a portion flowing into the flow converging structure and the remaining portion flowing into the second flow gap 15. After flowing through the second flow gap 15, the fluid can flow out of the housing 14 through the outlet 141, thereby completing the process of the fluid flowing into and out of the throttling assembly 1. As the fluid pushes the valve cap 13 away from the valve port 11, the valve cap 13 can move along the axial direction of the housing 14 in a direction away from the valve port 11.

[0070] like Figure 1-Figure 5 and Figure 10 As shown, in one embodiment of the present invention, the end wall of the housing 14 opposite to the valve port 11 may be provided with a flow outlet 141 , and the number of the flow outlets 141 is multiple, and the multiple flow outlets 141 are spaced apart in the circumferential direction of the housing 14 .

[0071] In actual applications, the fluid flowing through the second flow gap 15 can flow in a direction away from the valve member 11, that is, can flow toward the end wall of the housing 14 opposite the valve member 11. When the fluid flows to the end wall of the housing 14 opposite the valve member 11, the fluid can flow out of the housing 14 through the multiple flow outlets 141 spaced apart in the circumferential direction of the housing 14. By providing the multiple flow outlets 141 on the end wall of the housing 14 opposite the valve member 11 and arranging the multiple flow outlets 141 spaced apart in the circumferential direction of the housing 14, bubbles in the fluid can be dispersed, thereby reducing the noise generated by the fluid after flowing out of the throttle assembly 1, and further reducing the noise generated by the fluid flowing in the throttle valve 2.

[0072] Optionally, the plurality of outlets 141 may be evenly spaced apart in the circumferential direction of the housing 14 .

[0073] like Figure 6-Figure 8 As shown, in one embodiment of the present invention, the outer circumferential surface of the valve cap 13 may have a flow plane 132 , and the space between the flow plane 132 and the inner circumferential surface of the housing 14 forms a second flow gap 15 .

[0074] Specifically, the inner circumferential surface of the shell 14 can have an arc that protrudes away from the flow plane 132 relative to the flow plane 132, so that there can be a space between the flow plane 132 and the inner circumferential surface of the shell 14. The space can serve as a second flow gap 15, that is, the fluid can flow through the space between the flow plane 132 and the inner circumferential surface of the shell 14.

[0075] In an embodiment of the present invention, the valve cap 13 may be provided with a limiting structure, which cooperates with the inner circumference of the housing 14 to limit the movement of the valve cap 13 in the radial direction of the housing 14 .

[0076] By limiting the radial movement of the valve cap 13 in the outer shell 14 through the limiting structure, the valve cap 13 can be prevented from shaking radially along the outer shell 14 in the outer shell 14 when the fluid flows through the throttling assembly 1, and the valve cap 13 can be reduced from rotating circumferentially in the outer shell 14 due to shaking in the outer shell 14, thereby reducing the noise generated by the shaking and rotation of the valve cap 13 in the outer shell 14 and the collision and friction with the inner circumferential surface of the outer shell 14, thereby reducing the noise generated by the throttling assembly 1 when the fluid flows in the throttling assembly 1, and further reducing the noise generated by the throttle valve 2 when the fluid flows in the throttle valve 2.

[0077] like Figure 6-Figure 8 As shown, in one embodiment of the present invention, the outer peripheral surface of the valve bonnet 13 may have two radially opposite sides thereof with limiting planes 133 respectively, and limiting edges 134 are formed on both sides of the limiting planes 133 respectively, and the limiting edges 134 are abutted against the inner peripheral surface of the outer shell 14. The limiting structure may include multiple limiting edges 134.

[0078] That is, the limiting edge 134 abuts against the inner circumferential surface of the housing 14 , thereby limiting the movement of the valve cap 13 in the radial direction of the housing 14 .

[0079] like Figure 6-Figure 8 As shown, optionally, the outer peripheral surface of the valve bonnet 13 can have multiple flow planes 132 and multiple limit planes 133, and the multiple flow planes 132 and the multiple limit planes 133 are spaced apart in the circumferential direction of the valve bonnet 13, and adjacent flow planes 132 and limit planes 133 have an angle, so that a limit edge 134 can be formed at the junction of adjacent flow planes 132 and limit planes 133.

[0080] In an embodiment of the present invention, the valve cap 13 may be provided with an overflow structure, and the first overflow gap is connected to the second overflow gap 15 through the overflow structure.

[0081] In practical applications, part of the fluid flowing through the first flow gap can flow into the flow converging structure, and the other part can flow to the second flow gap 15 through the flow structure.

[0082] like Figure 6 As shown, in one embodiment of the present invention, the overflow structure may include an overflow groove 135, which is arranged at the end of the valve cap 13 close to the valve mouth piece 11, and the notch of the overflow groove 135 faces the valve mouth piece 11, and the overflow groove 135 is respectively connected to the flow gathering structure and the second overflow gap 15.

[0083] In actual application, when the head section 121 of the valve needle 12 is completely inserted into the valve port 111, the two end surfaces of the valve cap 13 and the valve port member 11 can be abutted against each other. By providing a flow groove 135 at the end of the valve cap 13 close to the valve port member 11, and making the notch of the flow groove 135 face the valve port member 11, and making the flow groove 135 communicate with the flow gathering structure and the second flow gap 15 respectively, the fluid flowing through the first flow gap can flow into the flow gathering structure first. When the fluid in the flow gathering structure gathers After reaching a certain level, it flows from the flow-gathering structure to the second flow-gap 15 through the flow-gap groove 135. In this way, the fluid flowing through the first flow-gap can first be gathered in the flow-gathering structure, and then flow from the flow-gathering structure to the second flow-gap 15 through the flow-gap groove 135. This is conducive to the fluid gathering in the flow-gathering structure, and is conducive to the fluid pushing the valve cap 13 and the valve needle 12 to move, avoiding the hysteresis of the fluid flow control caused by the fluid flowing through the first flow gap directly flowing to the second flow gap 15.

[0084] like Figure 7 As shown, in one embodiment of the present invention, the overflow structure may include an overflow protrusion 136, which is arranged on the end face of the valve bonnet 13 facing the valve mouth member 11 and abuts against the end face of the valve mouth member 11 facing the valve bonnet 13, and the gaps between the two opposite end faces of the valve bonnet 13 and the valve mouth member 11 are respectively connected to the first overflow gap and the second overflow gap 15.

[0085] In actual application, when the head section 121 of the valve needle 12 is completely inserted into the valve port 111, there is a flow convex portion 136 between the two opposite end faces of the valve bonnet 13 and the valve port member 11, and a gap can be provided between the two opposite end faces of the valve bonnet 13 and the valve port member 11. In this way, the fluid flowing through the first flow gap can first flow into the flow gathering structure. When the fluid in the flow gathering structure gathers to a certain extent, it flows from the flow gathering structure to the second flow gap 15 through the gap between the two opposite end faces of the valve bonnet 13 and the valve port member 11. In this way, the fluid flowing through the first flow gap can first gather in the flow gathering structure, and then flow from the flow gathering structure to the second flow gap 15 through the gap between the two opposite end faces of the valve bonnet 13 and the valve port member 11, which can be beneficial for the fluid to gather in the flow gathering structure, and is beneficial for the fluid to push the valve bonnet 13 and the valve needle 12 to move, avoiding the hysteresis of fluid flow control caused by the fluid flowing through the first flow gap directly flowing to the second flow gap 15.

[0086] like Figure 6 As shown, optionally, the flow-over groove 135 can be provided at the notch end of the flow-concentrating groove 131 .

[0087] like Figure 6 As shown, optionally, the number of the flow-through grooves 135 can be multiple, and the multiple flow-through grooves 135 are spaced apart in the circumferential direction of the valve cap 13 .

[0088] like Figure 7 As shown, optionally, the flow-through protrusion 136 can be provided on the notch end surface of the flow-concentrating groove 131 .

[0089] like Figure 7 As shown, optionally, there may be a plurality of flow-through protrusions 136 , and the plurality of flow-through protrusions 136 are spaced apart in the circumferential direction of the valve cap 13 .

[0090] In an embodiment of the present invention, the throttling assembly 1 may further include a reset component, which is connected to the valve cap 13 and the housing 14 respectively, and is used to provide a force for the valve cap 13 to move toward the valve port 11 .

[0091] In actual applications, the direction of the force exerted by the reset component on the valve bonnet 13 can be opposite to the direction of the force exerted by the fluid flowing into the flow converging structure on the valve bonnet 13. When the fluid flowing into the valve port 111 increases, the force exerted by the fluid on the valve bonnet 13 increases. When the force exerted by the fluid on the valve bonnet 13 is greater than the force exerted by the reset component on the valve bonnet 13, the force exerted by the fluid on the valve bonnet 13 can cause the valve bonnet 13 to move away from the valve port 11, thereby increasing the fluid flow rate that can flow through the throttling assembly 1. When the fluid flowing into the valve port 111 decreases, the force exerted by the fluid on the valve bonnet 13 decreases. When the force exerted by the fluid on the valve bonnet 13 is less than the force exerted by the reset component on the valve bonnet 13, the force exerted by the reset component on the valve bonnet 13 can cause the valve bonnet 13 to move closer to the valve port 11, thereby reducing the fluid flow rate that can flow through the throttling assembly 1.

[0092] like Figure 1-Figure 5 As shown, in one embodiment of the present invention, the reset component may include a compression spring 16, which is sleeved on the middle section 122 of the valve needle 12, and the two ends of the compression spring 16 are respectively connected to the surface of the valve cap 13 facing away from the valve mouth piece 11 and the surface of the outer shell 14 opposite to the valve mouth piece 11.

[0093] In actual application, when the fluid pushes the valve cap 13 away from the valve mouth member 11, the compression spring 16 is compressed to generate an elastic force toward the valve mouth member 11 (that is, the force provided by the compression spring 16 to the valve cap 13 to move closer to the valve mouth member 11). When the fluid flowing into the valve port 111 decreases and the force of the fluid acting on the valve cap 13 is less than the elastic force of the compression spring 16, the compression deformation of the compression spring 16 can be restored, thereby making the valve cap 13 close to the valve mouth member 11 with the help of the elastic force generated by the compression of the compression spring 16.

[0094] like Figure 1-Figure 5 As shown, in one embodiment of the present invention, the valve needle 12 may further have a tail section 123, and the tail section 123, the middle section 122 and the head section 121 of the valve needle 12 are connected in sequence. The end wall of the shell 14 opposite to the valve mouth member 11 may be provided with a limiting hole 142, and the tail section 123 of the valve needle 12 can move along the axial direction of the limiting hole 142 through the limiting hole 142. The limiting hole 142 is used to limit the radial movement of the tail section 123 of the valve needle 12 in the limiting hole 142.

[0095] As the valve needle 12 moves away from or toward the valve port 111, the tail section 123 of the valve needle 12 can move within the limiting hole 142 in the axial direction of the limiting hole 142 as the valve needle 12 moves. The limiting hole 142 limits the radial movement of the tail section 123 of the valve needle 12 within the limiting hole 142, and thus limits the radial movement of the valve needle 12 within the housing 14. This improves the stability of the axial movement of the valve needle 12 within the housing 14, reduces noise generated by vibration and rotation of the valve cap 13 within the housing 14 and collision and friction with the inner circumferential surface of the housing 14, and thus reduces noise generated by the throttle assembly 1 when fluid flows through the throttle assembly 1, and further reduces noise generated by the throttle valve 2 when fluid flows through the throttle valve 2.

[0096] However, the throttle assembly 1 provided in the embodiment of the present invention is not limited to the valve needle 12 and also has a tail section 123, for example, Figure 11 As shown, the valve needle 12 may also have a head section 121 and a middle section 122, but not a tail section 123. This can shorten the length of the valve needle 12, thereby shortening the length of the throttle assembly 1 and the throttle valve 2, and improving the structural compactness of the throttle assembly 1 and the throttle valve 2.

[0097] like Figure 11 As shown, in one embodiment of the present invention, the valve port member 11 can be disposed in the housing 14 .

[0098] Such a design can improve the structural compactness of the throttle assembly 1 and the throttle valve 2. However, the throttle assembly 1 provided in the embodiment of the present invention is not limited to the valve port 11 being disposed inside the housing 14. For example, as shown in the figure, the valve port 11 can also be disposed outside the housing 14.

[0099] like Figure 12-14 and Figures 18-21 As shown, the embodiment of the present invention further provides a throttle valve 2 , comprising a valve housing 21 and a throttle assembly 1 as provided in the embodiment of the present invention, wherein the throttle assembly 1 is disposed in the valve housing 21 .

[0100] The throttle valve 2 provided in the embodiment of the present invention, with the help of the throttle assembly 1 provided in the embodiment of the present invention, can make the valve cap 13 and the valve needle 12 easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control.

[0101] like Figure 12 、 Figure 14 、 Figure 18 、 Figure 19 and Figure 21 As shown, in one embodiment of the present invention, the throttle valve 2 may include a plurality of throttle assemblies 1, and the plurality of throttle assemblies 1 are arranged in the valve housing 21 at intervals in the circumferential direction of the valve housing 21, and the direction of at least one throttle assembly 1 is opposite to that of the other throttle assemblies 1.

[0102] In actual applications, by increasing the radial dimension of the valve housing 21, multiple throttling assemblies 1 can be arranged at intervals in the valve housing 21 in the circumferential direction of the valve housing 21. When the radial dimension of the valve housing 21 is increased, the fluid can have a larger flow space after flowing out of the throttling assembly 1 into the valve housing 21, thereby reducing the noise generated in the valve housing 21 after the fluid flows out of the throttling assembly 1 into the valve housing 21, and further reducing the noise generated by the throttle valve 2 when the fluid flows in the throttle valve 2. Compared with the throttle valve 2 in the related art, there is no need to set a silencer component in the throttle valve 2 to reduce the noise during the operation of the throttle valve 2, thereby reducing the cost of the throttle valve 2 and simplifying the structure of the throttle valve 2 on the basis of reducing the noise during the operation of the throttle valve 2.

[0103] In actual application, by making the direction of at least one throttling component 1 opposite to the direction of the other throttling components 1, that is, the fluid inflow and outflow direction of at least one throttling component 1 is opposite to the fluid inflow direction of the other throttling components 1, the throttle valve 2 can achieve a two-way throttling function.

[0104] like Figure 13 and Figure 20 As shown, in one embodiment of the present invention, the throttle valve 2 may include a one-way component 3 and at least one throttling component 1. The one-way component 3 is used to allow fluid to flow in and out in a single direction. The one-way component 3 and the throttling component 1 are arranged at intervals in the circumferential direction of the valve housing 21, and the direction of the throttling component 1 is opposite to that of the one-way component 3.

[0105] In actual applications, the radial dimension of the valve housing 21 can be increased so that the one-way component 3 and the throttling component 1 can be arranged at intervals in the circumferential direction of the valve housing 21. When the radial dimension of the valve housing 21 is increased, the fluid can have a larger flow space after flowing out of the one-way component 3 and the throttling component 1 into the valve housing 21, thereby reducing the noise generated in the valve housing 21 after the fluid flows out of the one-way component 3 and the throttling component 1 into the valve housing 21, and further reducing the noise generated by the throttle valve 2 when the fluid flows in the throttle valve 2. Compared with the throttle valve 2 in the related art, there is no need to set a silencer component in the throttle valve 2 to reduce the noise during operation of the throttle valve 2, thereby reducing the cost of the throttle valve 2 and simplifying the structure of the throttle valve 2 on the basis of reducing the noise during operation of the throttle valve 2.

[0106] In actual application, by making the direction of the throttling component 1 opposite to that of the one-way component 3, that is, the fluid inflow and outflow direction of the throttling component 1 is opposite to that of the one-way component 3, the throttling valve 2 can realize the one-way throttling function.

[0107] like Figure 12 、 Figure 13 and Figures 18-21 As shown, in one embodiment of the present invention, at least a portion of a throttling assembly 1 and at least a portion of another throttling assembly 1 in the opposite direction can be overlapped in the radial direction of the valve housing 21, or, at least a portion of the throttling assembly 1 and at least a portion of the one-way assembly 3 can be overlapped in the radial direction of the valve housing 21.

[0108] like Figure 12 and Figure 18 As shown, optionally, part of a throttling assembly 1 and part of another throttling assembly 1 facing oppositely are overlapped in the radial direction of the valve housing 21, that is, a part of the axial direction of one throttling assembly 1 and a part of the axial direction of another throttling assembly 1 facing oppositely are overlapped in the radial direction of the valve housing 21, and another part of the axial direction of one throttling assembly 1 and another part of the axial direction of another throttling assembly 1 facing oppositely are not overlapped in the radial direction of the valve housing 21.

[0109] like Figure 19 and Figure 21 As shown, optionally, the entirety of one throttling assembly 1 and the entirety of another throttling assembly 1 facing in the opposite direction are overlapped in the radial direction of the valve housing 21, that is, in the radial direction of the valve housing 21, one throttling assembly 1 and the entirety of another throttling assembly 1 facing in the opposite direction are completely overlapped in the radial direction of the valve housing 21, which can shorten the length of the throttle valve 2 and improve the structural compactness of the throttle valve 2.

[0110] like Figure 13As shown, optionally, part of the throttling assembly 1 and part of the one-way assembly 3 are overlapped in the radial direction of the valve housing 21, that is, one part of the throttling assembly 1 in the axial direction and one part of the one-way assembly 3 in the axial direction are overlapped in the radial direction of the valve housing 21, and another part of the throttling assembly 1 in the axial direction and another part of the one-way assembly 3 in the axial direction are not overlapped in the radial direction of the valve housing 21.

[0111] like Figure 20 As shown, optionally, part of the throttling assembly 1 and the entire one-way assembly 3 are overlapped in the radial direction of the valve housing 21, that is, a part of the throttling assembly 1 in the axial direction and the one-way assembly 3 are completely overlapped in the radial direction of the valve housing 21, and another part of the throttling assembly 1 in the axial direction and the one-way assembly 3 are not overlapped in the radial direction of the valve housing 21, which can shorten the length of the throttle valve 2 and improve the structural compactness of the throttle valve 2.

[0112] like Figure 12-14 and Figures 18-23 As shown, in one embodiment of the present invention, the throttle valve 2 may further include an external shell 22 . The external shells 22 are respectively provided at both ends of the valve shell 21 , and the radial dimension of the valve shell 21 is larger than the radial dimension of the external shell 22 .

[0113] In practical applications, the throttle valve 2 can be connected to an external pipeline through the external shell 22. By making the radial dimension of the external shell 22 smaller than the radial dimension of the valve shell 21, the size of the throttle valve 2 can be reduced and the structural compactness of the throttle valve 2 can be improved.

[0114] Optionally, the material of the valve housing 21 may be stainless steel.

[0115] Optionally, the material of the external shell 22 may be stainless steel.

[0116] Optionally, the external shell 22 and the valve shell 21 may be an integral structure.

[0117] like Figure 12-14 and Figures 18-23 As shown, optionally, the throttle valve 2 may further include an external connector 23 , which is connected to the external shell 22 , and the external shell 22 may be in communication with an external pipeline through the external connector 23 .

[0118] Optionally, the material of the external connector 23 may be copper.

[0119] Optionally, the external connector 23 may be welded to the external shell 22 .

[0120] like Figure 12-14 and Figures 18-23As shown, optionally, the throttle valve 2 may also include a filter component 24 for filtering the fluid, and the filter component 24 is arranged in the external shell 22, or the filter component 24 is arranged in the external joint 23, or a part of the filter component 24 is arranged in the external shell 22, and the other part is arranged in the external joint 23.

[0121] like Figure 12 、 Figure 14 、 Figures 15-19 and Figure 21 As shown, in one embodiment of the present invention, the throttle valve 2 may further include a valve seat 25 , which is connected to the throttle assembly 1 and the valve housing 21 respectively, and is used to fix the throttle assembly 1 in the valve housing 21 .

[0122] That is, the throttle assembly 1 can be fixed in the valve housing 21 via the valve seat 25 .

[0123] Optionally, the material of the housing 14 may be stainless steel.

[0124] Optionally, the valve seat 25 may be made of stainless steel.

[0125] like Figure 13 and Figure 20 As shown, optionally, the one-way assembly 3 can be fixed in the valve housing 21 through the valve seat 25 .

[0126] like Figure 12-17 、 Figure 19 and Figure 20 As shown, in one embodiment of the present invention, the valve seat 25 may be provided with a connecting protrusion 251 , the valve housing 21 is provided with an assembly hole, and the connecting protrusion 251 is passed through the assembly hole.

[0127] In practical applications, the connecting protrusion 251 is passed through the assembly hole and connected to the valve housing 21 , thereby fixing the valve seat 25 to the valve housing 21 .

[0128] Optionally, the connecting protrusion 251 may be welded to the valve housing 21 .

[0129] like Figure 18 and Figure 21 As shown, in one embodiment of the present invention, the valve seat 25 may be provided with a connecting recess, and the valve housing 21 is provided with an assembly recess 211 , which is recessed into the connecting recess.

[0130] In practical applications, the valve seat 25 and the valve housing 21 can be fixed by pressing the assembly recess 211 into the connecting recess and by recessing and snapping the assembly recess 211 into the connecting recess.

[0131] like Figure 15-17As shown, optionally, the valve seat 25 can be provided with a snap-fitting hole, a snap-fitting portion is provided in the snap-fitting hole, and the housing 14 of the throttling assembly 1 can be provided with a matching portion. The throttling assembly 1 passes through the snap-fitting hole, and the matching portion of the housing 14 is snap-fitted and abutted against the snap-fitting portion in the snap-fitting hole, thereby achieving the fixation of the valve seat 25 and the throttling assembly 1.

[0132] Specifically, if Figures 19-21 As shown, in the embodiment where the valve port member 11 is disposed in the housing 14, the mating portion may be disposed in the middle of the housing 14. Figure 12 、 Figure 13 and Figure 16-Figure 18 As shown, in an embodiment where the valve port member 11 is disposed outside the housing 14 , the mating portion may be disposed at an end of the housing 14 close to the valve port member 11 .

[0133] Optionally, the fixing method of the valve seat 25 and the one-way component 3 can be similar to the fixing method of the valve seat 25 and the throttling component 1.

[0134] In summary, the throttle assembly 1 and the throttle valve 2 provided in the embodiment of the present invention can make the valve cap 13 and the valve needle 12 easily pushed by the fluid, thereby reducing the hysteresis of the fluid flow control and improving the sensitivity of the fluid flow control.

[0135] It is understood that the above embodiments are merely exemplary embodiments for illustrating the principles of the present invention, and the present invention is not limited thereto. Those skilled in the art will be able to make various modifications and improvements without departing from the spirit and substance of the present invention, and such modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A throttling assembly (1), characterized in that: The invention comprises a valve port member (11), a valve needle (12) and a valve bonnet (13), wherein the valve port member (11) is provided with a valve port (111) for fluid to flow in, a head section (121) of the valve needle (12) passes through the valve port (111), and when the head section (121) of the valve needle (12) passes through the valve port (111), a first flow gap for fluid to flow through is provided between the outer peripheral surface of the head section (121) of the valve needle (12) and the inner peripheral surface of the valve port (111), and the valve bonnet (13) is sleeved outside the middle section (122) of the valve needle (12), and the valve bonnet (13) is provided with a flow gathering structure, and the flow gathering structure is communicated with the valve port (111) for the fluid to flow in and gather, so as to push the valve bonnet (13) away from the valve port member (11) through the fluid, thereby driving the valve needle (12) away from the valve port (111).

2. The throttle assembly (1) according to claim 1, characterized in that The flow-gathering structure comprises a flow-gathering groove (131), and the notch of the flow-gathering groove (131) faces the valve port member (11).

3. The throttle assembly (1) according to claim 2, characterized in that The notch of the flow-gathering groove (131) is arranged opposite to the valve port (111), and a portion of the middle section (122) of the valve needle (12) is located in the flow-gathering groove (131).

4. The throttle assembly (1) according to claim 3, characterized in that The middle section (122) of the valve needle (12) is provided with a first limiting portion (124) and a second limiting portion (125), wherein the first limiting portion (124) abuts against the end face of the valve mouth member (11) facing the flow converging groove (131), and the second limiting portion (125) abuts against the bottom of the flow converging groove (131).

5. The throttle assembly (1) according to claim 1, characterized in that From the end of the valve needle (12) head section (121) away from the valve needle (12) middle section (122) to the end close to the valve needle (12) middle section (122), the radial size of the valve needle (12) head section (121) gradually increases, and from the end of the valve port (111) away from the valve bonnet (13) to the end close to the valve bonnet (13), the radial size of the valve port (111) is equal, and the radial size of the valve port (111) is greater than the radial size of the valve needle (12) head section (121).

6. The throttle assembly (1) according to claim 1, characterized in that The throttling assembly (1) further includes a housing (14), the valve cap (13) being arranged in the housing (14) so ​​as to be movable along the housing (14), and a second flow gap (15) for the fluid flowing through the first flow gap to flow through is provided between the outer peripheral surface of the valve cap (13) and the inner peripheral surface of the housing (14), and the housing (14) is provided with an outflow port (141) for the fluid flowing through the second flow gap (15) to flow out.

7. The throttle assembly (1) according to claim 6, characterized in that The end wall of the housing (14) opposite to the valve port member (11) is provided with the outflow port (141), and the number of the outflow ports (141) is multiple, and the multiple outflow ports (141) are spaced apart in the circumferential direction of the housing (14).

8. The throttle assembly (1) according to claim 6, characterized in that The outer peripheral surface of the valve cap (13) is provided with an overflow plane (132), and the space between the overflow plane (132) and the inner peripheral surface of the housing (14) forms the second overflow gap (15).

9. The throttle assembly (1) according to claim 6, characterized in that The valve cap (13) is provided with a limiting structure, and the limiting structure cooperates with the inner circumferential surface of the housing (14) to limit the movement of the valve cap (13) in the radial direction of the housing (14).

10. The throttle assembly (1) according to claim 9, characterized in that The outer peripheral surface of the valve bonnet (13) is provided with limiting planes (133) on two sides opposite to each other in the radial direction of the valve bonnet (13), and limiting edges (134) are formed on both sides of the limiting plane (133). The limiting edges (134) are respectively abutted against the inner peripheral surface of the outer shell (14), and the limiting structure includes a plurality of limiting edges (134).

11. The throttle assembly (1) according to claim 6, characterized in that The valve cap (13) is provided with an overflow structure, and the first overflow gap is connected to the second overflow gap (15) through the overflow structure.

12. The throttle assembly (1) according to claim 11, characterized in that The overflow structure includes an overflow groove (135) or an overflow protrusion (136), the overflow groove (135) is arranged at the end of the valve bonnet (13) close to the valve mouth part (11), and the notch of the overflow groove (135) faces the valve mouth part (11), the overflow groove (135) is respectively connected with the flow-gathering structure and the second overflow gap (15), the overflow protrusion (136) is arranged on the end face of the valve bonnet (13) facing the valve mouth part (11), and is abutted against the end face of the valve mouth part (11) facing the valve bonnet (13), and the gaps between the two opposite end faces of the valve bonnet (13) and the valve mouth part (11) are respectively connected with the first overflow gap and the second overflow gap (15).

13. The throttle assembly (1) according to claim 6, characterized in that The throttling assembly (1) further comprises a reset component, which is respectively connected to the valve cap (13) and the housing (14) and is used to provide a force for the valve cap (13) to move closer to the valve port (11).

14. The throttle assembly (1) according to claim 13, characterized in that The reset component includes a compression spring (16), which is sleeved outside the middle section (122) of the valve needle (12), and the two ends of the compression spring (16) are respectively connected to the surface of the valve cap (13) facing away from the valve mouth part (11) and the surface of the housing (14) opposite to the valve mouth part (11).

15. The throttle assembly (1) according to claim 6, characterized in that The valve needle (12) also has a tail section (123), and the tail section (123), middle section (122) and head section (121) of the valve needle (12) are connected in sequence. The end wall of the housing (14) opposite to the valve mouth member (11) is provided with a limiting hole (142). The tail section (123) of the valve needle (12) can move along the axial direction of the limiting hole (142) and pass through the limiting hole (142). The limiting hole (142) is used to limit the movement of the tail section (123) of the valve needle (12) in the radial direction of the limiting hole (142).

16. The throttle assembly (1) according to claim 6, characterized in that The valve port member (11) is arranged in the housing (14).

17. A throttle valve (2), characterized in that: It comprises a valve housing (21) and a throttling assembly (1) according to any one of claims 1 to 16, wherein the throttling assembly (1) is arranged in the valve housing (21).

18. The throttle valve (2) according to claim 17, characterized in that The throttle valve (2) includes a plurality of throttle assemblies (1), and the plurality of throttle assemblies (1) are arranged in the valve housing (21) at intervals in the circumferential direction of the valve housing (21), and the direction of at least one throttle assembly (1) is opposite to the direction of the other throttle assemblies (1); or, the throttle valve (2) includes a one-way assembly (3) and at least one throttle assembly (1), and the one-way assembly (3) is used for allowing fluid to flow in and out in a single direction, and the one-way assembly (3) and the throttle assembly (1) are arranged in the valve housing (21) at intervals in the circumferential direction of the valve housing (21), and the direction of the throttle assembly (1) is opposite to the direction of the one-way assembly (3).

19. The throttle valve (2) according to claim 18, characterized in that At least part of one throttling assembly (1) is overlapped with at least part of another throttling assembly (1) facing in the opposite direction in the radial direction of the valve housing (21), or at least part of the throttling assembly (1) is overlapped with at least part of the one-way assembly (3) in the radial direction of the valve housing (21).

20. The throttle valve (2) according to claim 18, characterized in that The throttle valve (2) further comprises an external shell (22), and the external shells (22) are respectively provided at both ends of the valve shell (21), and the radial dimension of the valve shell (21) is larger than the radial dimension of the external shell (22).

21. The throttle valve (2) according to claim 17, characterized in that The throttle valve (2) further comprises a valve seat (25), wherein the valve seat (25) is connected to the throttle assembly (1) and the valve housing (21) respectively, and is used for fixing the throttle assembly (1) in the valve housing (21).

22. The throttle valve (2) according to claim 21, characterized in that The valve seat (25) is provided with a connecting protrusion (251), the valve housing (21) is provided with an assembly hole, and the connecting protrusion (251) is inserted into the assembly hole; or, the valve seat (25) is provided with a connecting recess, the valve housing (21) is provided with an assembly recess (211), and the assembly recess (211) is recessed into the connecting recess.

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