Throttle valve and throttle valve device

Abstract

The utility model provides a throttling valve and a throttling valve device. The throttling valve comprises a valve seat and a valve element. A valve element cavity and a valve hole which are communicated in the axial direction are formed in the valve seat, and the inner diameter of the valve element cavity is larger than the diameter of the valve hole. The valve element cavity and the valve hole penetrate through the valve seat in the axial direction. A first matching surface is connected between the cavity wall of the valve core cavity and the hole wall of the valve hole; the valve element is arranged in the valve element cavity and provided with a first part and a second part which are connected in the axial direction, the outer diameter of the first part is larger than the aperture of the valve hole, and the outer diameter of the second part is smaller than or equal to the aperture of the valve hole. A second matching surface is connected between the outer peripheral surface of the first part and the outer peripheral surface of the second part; the valve element is provided with a throttling hole penetrating in the axial direction. When the throttling valve is in a throttling state, the first matching surface and the second matching surface at least partially abut against each other, and the second part is at least partially located in the valve hole.

Description

Technical Field

[0001] The present disclosure relates to the field of valve technology, and in particular to a throttle valve and a throttle valve device. Background Art

[0002] As household air conditioners become more popular, consumers' requirements for air conditioner noise quality are gradually increasing, and refrigerant flow noise has become the main noise in the air conditioning system. The discontinuous whistling noise generated when the short-tube throttle valve is throttled will seriously affect the user's comfort. Utility Model Content

[0003] A main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art and provide a throttle valve that can effectively improve the noise problem.

[0004] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0005] According to one aspect of the present disclosure, a throttle valve is provided, which includes a valve seat and a valve core; a valve core cavity and a valve hole connected along the axial direction of the throttle valve are provided inside the valve seat, and the inner diameter of the valve core cavity is larger than the aperture of the valve hole; the valve core cavity and the valve hole pass through the valve seat axially; a first mating surface is connected between the wall of the valve core cavity and the wall of the valve hole; the valve core is arranged in the valve core cavity, and has a first part and a second part connected along the axial direction, the outer diameter of the first part is larger than the aperture of the valve hole, and the outer diameter of the second part is smaller than or equal to the aperture of the valve hole; a second mating surface is connected between the outer peripheral surface of the first part and the outer peripheral surface of the second part; the valve core is provided with a throttle hole passing through the axial direction; wherein, when the throttle valve is in a throttling state, the first mating surface and the second mating surface at least partially conflict with each other, and the second part is at least partially located in the valve hole.

[0006] According to one embodiment of the present disclosure, the valve hole opens to the first end face of the valve seat at one end away from the valve core cavity, and the second part has a second end face facing away from the first part; wherein, when the throttle valve is in the throttling state, the ratio of the axial distance between the first end face and the second end face to the length of the valve hole is less than or equal to 0.5.

[0007] According to one embodiment of the present disclosure, the valve seat is provided with a flow channel opening, which passes through the valve seat radially along the throttle valve and is connected to the valve core cavity; wherein, when the throttle valve is in a throttling state, the first part covers the entire area of ​​the flow channel opening in the axial direction.

[0008] According to one embodiment of the present disclosure, the first portion has a third end surface facing away from the second portion, the third end surface is provided with a groove, and the valve hole is connected to the groove.

[0009] According to one embodiment of the present disclosure, the first mating surface is a plane perpendicular to the axial direction, the second mating surface is an inclined surface or an arc surface, and the connection between the first mating surface and the inner wall of the valve hole conflicts with the second mating surface; or, the first mating surface and the second mating surface are inclined surfaces or arc surfaces with matching shapes.

[0010] According to one of the embodiments of the present disclosure, wherein: the valve hole opens to the first end face of the valve seat at one end away from the valve core cavity, and the valve hole is provided with an inverted slope structure or an inverted arc surface structure at the orifice of the first end face; and / or, the orifice of the throttling hole is provided with an inverted slope structure or an inverted arc surface structure.

[0011] As can be seen from the above technical solutions, the advantages and positive effects of the throttle valve proposed in this disclosure are:

[0012] The throttle valve proposed in the present disclosure includes a valve seat and a valve core; the valve seat is provided with a valve core cavity and a valve hole connected in the axial direction, and the inner diameter of the valve core cavity is larger than the diameter of the valve hole; the valve core cavity and the valve hole pass through the valve seat in the axial direction; the valve core is provided in the valve core cavity and has a first part and a second part connected in the axial direction, the outer diameter of the first part is larger than the diameter of the valve hole, and the outer diameter of the second part is smaller than or equal to the diameter of the valve hole; the valve core is provided with a throttle hole passing through in the axial direction. Through the above design, the present disclosure makes a special design for the valve core structure. Under the condition that the length of the throttle hole is certain, the present disclosure can make the valve core partially located in the valve hole when the throttle valve is in the throttling state. In this way, the flow area of ​​the fluid after passing through the throttle hole will become larger, thereby reducing the flow rate of the fluid and effectively reducing the noise.

[0013] Another main purpose of the present disclosure is to overcome at least one of the above-mentioned defects of the prior art and provide a throttle valve device that can effectively improve the noise problem.

[0014] To achieve the above objectives, the present disclosure adopts the following technical solutions:

[0015] According to one aspect of the present disclosure, a throttle valve device is provided, wherein the throttle valve device includes a throttle valve and a valve pipe proposed in the present disclosure and described in the above embodiment, and the throttle valve is arranged in the valve pipe.

[0016] According to one embodiment of the present disclosure, a ratio of an inner diameter of the valve tube to an aperture of the throttle hole is greater than or equal to 5.

[0017] According to one embodiment of the present disclosure, a first depression is provided on the outer wall of the valve seat, and a first protrusion is provided on the inner wall of the valve tube. The first protrusion cooperates with the first depression to limit the throttle valve.

[0018] According to one embodiment of the present disclosure, the throttle valve further includes two filtering devices, which are arranged in the valve tube, and the two filtering devices are respectively located on both sides of the throttle valve in the axial direction.

[0019] As can be seen from the above technical solutions, the advantages and positive effects of the throttle valve device proposed in this disclosure are:

[0020] The throttle valve device proposed in the present disclosure, by adopting the throttle valve proposed in the present disclosure, can make the valve core partially located in the valve hole when the throttle valve is in the throttling state. In this way, the distance between the throttle hole outlet and the valve hole outlet becomes smaller, and the flow area after the fluid passes through the throttle hole will rapidly increase, thereby reducing the flow rate of the fluid and effectively reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The various objects, features, and advantages of the present disclosure will become more apparent upon consideration of the following detailed description of preferred embodiments of the present disclosure in conjunction with the accompanying drawings. The accompanying drawings are merely illustrative illustrations of the present disclosure and are not necessarily drawn to scale. In the drawings, like reference numerals refer to the same or similar parts throughout.

[0022] Figure 1 is a perspective schematic diagram of a throttle valve device according to an exemplary embodiment;

[0023] Figure 2 yes Figure 1 An axial cross-sectional view of the throttle valve device is shown;

[0024] Figure 3 is a perspective schematic diagram of a throttle valve according to an exemplary embodiment;

[0025] Figure 4 yes Figure 3 Another angle view of

[0026] Figure 5 yes Figure 3 An axial cross-sectional view of a throttle valve is shown;

[0027] Figure 6 yes Figure 5 3D schematic diagram of

[0028] Figure 7 yes Figure 5 A three-dimensional schematic diagram of the valve core is shown;

[0029] Figure 8 is an axial cross-sectional view of a throttle valve according to another exemplary embodiment;

[0030] Figure 9 yes Figure 8 A three-dimensional schematic diagram of the valve core is shown;

[0031] Figure 10 yes Figure 1 The cloud diagram of the sound pressure value of the throttle valve device in the noise experiment is shown;

[0032] Figure 11 This is a cloud diagram comparing the sound pressure values ​​of the throttle valve device in the noise experiment.

[0033] The following are the descriptions of the reference numerals:

[0034] 100. Throttle valve;

[0035] 110. Valve seat;

[0036] 111. Valve core cavity;

[0037] 112. Valve hole;

[0038] 113. First end surface;

[0039] 114. First mating surface;

[0040] 115. Runner mouth;

[0041] 116. First depression;

[0042] 120. Valve core;

[0043] 121. Part 1;

[0044] 1211. The third end face;

[0045] 1212. groove;

[0046] 122. Part II;

[0047] 1221. Second end face;

[0048] 123. Second mating surface;

[0049] 124. Throttle;

[0050] 200. Valve pipe;

[0051] 210. First protrusion;

[0052] 220. Second bulge;

[0053] 300. Filtering device;

[0054] L1. Distance;

[0055] L2. Length. DETAILED DESCRIPTION

[0056] Typical embodiments that embody the features and advantages of the present disclosure will be described in detail in the following description. It should be understood that the present disclosure can have various variations in different embodiments without departing from the scope of the present disclosure, and the description and drawings therein are essentially for illustrative purposes rather than for limiting the present disclosure.

[0057] In the following description of different exemplary embodiments of the present disclosure, reference is made to the accompanying drawings, which form a part of this disclosure and in which are shown by way of example different exemplary structures, systems and steps that may implement aspects of the present disclosure. It should be understood that other specific schemes of components, structures, exemplary devices, systems and steps may be used, and structural and functional modifications may be made without departing from the scope of the present disclosure. Moreover, although the terms "above", "between", "within", etc. may be used in this specification to describe different exemplary features and elements of the present disclosure, these terms are used herein for convenience only, for example, according to the directions of the examples depicted in the accompanying drawings. Nothing in this specification should be construed as requiring a specific three-dimensional orientation of a structure to fall within the scope of the present disclosure.

[0058] See Figure 3 , which representatively illustrates a perspective schematic diagram of the throttle valve 100 proposed in the present disclosure. In this exemplary embodiment, the throttle valve 100 proposed in the present disclosure is described using a throttle valve device for air conditioning equipment as an example. Those skilled in the art will readily appreciate 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 the present disclosure to throttle valve devices for other types of equipment. Such modifications remain within the scope of the principles of the throttle valve 100 proposed in the present disclosure.

[0059] like Figure 3 As shown, in one embodiment of the present disclosure, the throttle valve 100 provided by the present disclosure includes a valve seat 110 and a valve core 120. Figures 4 to 7 , Figure 4 Representatively shown in Figure 3 Another angle view of Figure 5 , which is a representative axial cross-sectional view of the throttle valve 100; Figure 6 Representatively shown in Figure 5 Specifically, Figure 5 and Figure 6 The cross-sectional structures of the throttle valve 100 when in the throttle state are shown respectively; Figure 7 1 is a representative perspective view of the valve core 120. The following will describe in detail the structure, connection mode and functional relationship of the main components of the throttle valve 100 proposed in the present disclosure in conjunction with the above drawings.

[0060] like Figures 3 to 7As shown, in one embodiment of the present disclosure, a valve core cavity 111 and a valve hole 112 are provided within the valve seat 110, interconnected along the axial direction of the throttle valve 100 (e.g., the X direction shown in the accompanying drawings). The inner diameter of the valve core cavity 111 is larger than the diameter of the valve hole 112. The valve core cavity 111 and the valve hole 112 axially extend through the valve seat 110, with the end of the valve hole 112 distal from the valve core cavity 111 opening at a first end surface 113 of the valve seat 110. A first mating surface 114 is formed between the wall of the valve core cavity 111 and the wall of the valve hole 112. A valve core 120 is disposed within the valve core cavity 111 and includes a first portion 121 and a second portion 122 connected axially. The outer diameter of the first portion 121 is larger than the diameter of the valve hole 112, while the outer diameter of the second portion 122 is smaller than or equal to the diameter of the valve hole 112. The second portion 122 has a second end surface 1221 facing away from the first portion 121. A second mating surface 123 is connected between the outer circumference of the first portion 121 and the outer circumference of the second portion 122. The valve core 120 is provided with a throttle hole 124 extending axially therethrough. In the throttle valve 100 in the throttle state, the first mating surface 114 and the second mating surface 123 at least partially abut against each other, and the second portion 122 is at least partially located within the valve hole 112, such that the axial distance between the first end surface 113 and the second end surface 1221 is less than the length of the valve hole 112.

[0061] It should be noted that if Figure 7 As shown, the outer circumference of the valve core 120 includes at least three parts: a cylindrical surface of the first portion 121, a cylindrical surface of the second portion 122, and a second mating surface 123. In other words, the outer circumference of the first portion 121 and the outer circumference of the second portion 122 are both cylindrical surfaces with a uniform outer diameter, and the second mating surface 123 connecting the two cylindrical surfaces is a conical surface.

[0062] like Figure 5 As shown, in one embodiment of the present disclosure, when the throttle valve 100 is in the throttle state, the ratio of the axial distance L1 between the first end face 113 and the second end face 1221 to the length L2 of the valve hole 112 can be less than or equal to 0.5, for example, 0.1, 0.2, 0.3, 0.45, 0.5, etc. Through the above design, the present disclosure can ensure that the axial distance L1 between the first end face 113 and the second end face 1221 is not too large. Accordingly, when the length of the throttle hole 124 is constant, the flow area of ​​the fluid after passing through the throttle hole 124 is further increased, thereby further reducing the flow rate and noise. Furthermore, since the smaller the ratio of the distance L1 to the length L2, the better the noise reduction effect, the present disclosure can further enhance the noise reduction effect of the throttle valve 100.

[0063] like Figures 3 to 6As shown, in one embodiment of the present disclosure, the valve seat 110 may be provided with a flow passage 115. The flow passage 115 penetrates the valve seat 110 in the radial direction of the throttle valve 100 (for example, in any direction spatially perpendicular to the X direction shown in the drawings), and the flow passage 115 is connected to the valve core cavity 111. On this basis, when the throttle valve 100 is in the throttle state, the first portion 121 of the valve core 120 covers the entire area of ​​the flow passage 115 in the axial direction. That is, when the first mating surface 114 and the second mating surface 123 contact each other, the side wall of the first portion 121 of the valve core 120 blocks the flow passage 115.

[0064] like Figure 5 and Figure 6 As shown, in one embodiment of the present disclosure, the first mating surface 114 of the valve seat 110 can be a plane perpendicular to the axial direction, and the second mating surface 123 of the valve core 120 can be an inclined surface (or an arc surface), accordingly, the connection between the first mating surface 114 and the inner wall of the valve hole 112 conflicts with the second mating surface 123. Specifically, since the first mating surface 114 is a plane, it forms a step structure on the inner wall of the valve seat 110 (i.e., the connection between the inner wall of the valve core cavity 111 and the hole wall of the valve hole 112), and the first mating surface 114 is the step surface of the step structure. Accordingly, the second mating surface 123 conflicts with the vertex position of the step structure, that is, the contact between the first mating surface 114 and the second mating surface 123 is a line contact. In some other embodiments of the present disclosure, the first mating surface 114 and the second mating surface 123 can be inclined surfaces (or arc surfaces) with matching shapes, that is, when the first mating surface 114 and the second mating surface 123 conflict with each other, they are in a surface contact form, which is not limited to the above embodiments.

[0065] like Figure 5 and Figure 6 As shown, in one embodiment of the present disclosure, the valve hole 112 may be provided with an inverted slope structure (or an inverted arc structure) at the opening of the first end surface 113. Through the above design, the present disclosure can reduce the flow resistance of the fluid when flowing through the above opening, thereby ensuring the flow performance of the fluid.

[0066] like Figures 5 to 7 As shown, in one embodiment of the present disclosure, the orifice of the throttle hole 124 (for example, one orifice of the throttle hole 124 on the second end surface 1221 and / or another orifice of the throttle hole 124 on the third end surface 1211) can be provided with an inverted slope structure (or an inverted arc structure). Through the above design, the present disclosure can reduce the flow resistance of the fluid when flowing through the above orifice, thereby ensuring the flow performance of the fluid.

[0067] See Figure 8 and Figure 9 , Figure 8, which is a representative axial cross-sectional view of another exemplary embodiment of a throttle valve 100 that can embody the principles of the present disclosure; Figure 9 Representatively shown in Figure 8 A perspective schematic diagram of the valve core 120 is shown.

[0068] like Figure 8 and Figure 9 As shown, in one embodiment of the present disclosure, the first portion 121 of the valve core 120 has a third end surface 1211 facing away from the second portion 122. The third end surface 1211 may be provided with a groove 1212, and the valve hole 112 is connected to the groove 1212. Through this design, the present disclosure can reduce the material usage of the valve core 120 and reduce the weight of the valve core 120, which is beneficial for improving economy and adapting to lightweight design. Furthermore, because the valve core 120 of the present disclosure is specially designed so that it can be partially located in the valve hole 112 when the throttle valve 100 is in the throttle state, and the outer peripheral surface of the first portion 121 can cover the entire flow channel opening 115, this design increases the length of the valve core 120. The increase in the length of the valve core 120 will result in an increase in the length of the throttle hole 124, which will affect the flow rate during throttling. The provision of the groove 1212 can reduce the length of the throttle hole 124, preventing the throttle hole 124 from being too long after the length of the valve core 120 is increased.

[0069] It should be noted that the throttle valves shown in the drawings and described in this specification are only a few examples of the many types of throttle valves that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are in no way limited to any details or any components of the throttle valves shown in the drawings or described in this specification.

[0070] To sum up, the throttle valve 100 proposed in the present disclosure includes a valve seat 110 and a valve core 120; the valve seat 110 is provided with a valve core cavity 111 and a valve hole 112 connected along the axial direction, and the inner diameter of the valve core cavity 111 is larger than the aperture of the valve hole 112; the valve core cavity 111 and the valve hole 112 pass through the valve seat 110 along the axial direction; the valve core 120 is arranged in the valve core cavity 111 and has a first part 121 and a second part 122 connected along the axial direction, the outer diameter of the first part 121 is larger than the aperture of the valve hole 112, and the outer diameter of the second part 122 is less than or equal to the aperture of the valve hole 112; the valve core 120 is provided with a throttling hole 124 passing through along the axial direction. Through the above design, the present disclosure makes a special design for the valve core 120 structure. When the length of the throttle hole 124 is certain, the present disclosure can make the valve core 120 partially located in the valve hole 112 when the throttle valve 100 is in the throttling state. In this way, the flow area after the fluid passes through the throttle hole 124 will become larger, thereby reducing the flow rate of the fluid and effectively reducing noise.

[0071] Based on the above detailed description of several exemplary embodiments of the throttle valve proposed in the present disclosure, an exemplary embodiment of the throttle valve device proposed in the present disclosure will be described below.

[0072] See Figure 1 , which representatively illustrates a perspective schematic diagram of the throttle valve device proposed in the present disclosure. In this exemplary embodiment, the throttle valve device proposed in the present disclosure is described using an air conditioning device as an example. Those skilled in the art will readily appreciate 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 the present disclosure to other types of equipment. Such modifications remain within the scope of the principles of the throttle valve device proposed in the present disclosure.

[0073] like Figure 1 As shown, in one embodiment of the present disclosure, the throttle valve device proposed in the present disclosure includes a valve tube 200 and a throttle valve 100 (not shown in the drawings). The working principle of the throttle valve device proposed in the present disclosure is roughly as follows: when the throttle valve device is in the throttling state, the valve core 120 blocks the flow channel 115. At this time, the flow path of the fluid is roughly "valve tube 200 → valve core cavity 111 → throttling hole 124 → valve hole 112 → valve tube 200"; when the throttle valve device is in the reverse flow state, the valve core 120 moves into the valve core cavity 111, the second part 122 moves out of the valve port 112, and the valve core 120 does not block the flow channel 115. At this time, the flow path of the fluid is roughly "valve tube 200 → valve hole 112 → valve core cavity 111 → flow channel 115 → valve tube 200". For reference Figure 2 , Figure 2 The axial side cross-sectional view of the throttle valve device is representatively shown in FIG. The structure, connection mode and functional relationship of the main components of the throttle valve device proposed in the present disclosure will be described in detail below in conjunction with the above drawings.

[0074] like Figure 1 and Figure 2 As shown, in one embodiment of the present disclosure, the throttle valve device proposed in the present disclosure includes a valve tube 200 and the throttle valve 100 proposed in the present disclosure and described in detail in the above embodiment, and the throttle valve 100 is arranged in the valve tube 200.

[0075] In one embodiment of the present disclosure, the ratio of the inner diameter of the valve tube 200 to the aperture of the throttle hole 124 can be greater than or equal to 5, for example, 5, 6, 8, 10, etc. Through the above design, since a larger ratio of the inner diameter of the valve tube 200 to the aperture of the throttle hole 124 results in a better noise reduction effect, the present disclosure can further enhance the noise reduction effect of the throttle valve device.

[0076] like Figure 1 and Figure 2 As shown, while cooperating Figures 3 to 6As shown, in one embodiment of the present disclosure, the outer wall of the valve seat 110 may be provided with a first recess 116, and the inner wall of the valve tube 200 may be provided with a first protrusion 210. The first protrusion 210 cooperates with the first recess 116 to limit the position of the throttle valve 100. Furthermore, the first protrusion 210 may be formed by integrally stamping and bending the wall of the valve tube 200, further reducing material usage and weight.

[0077] like Figure 2 As shown, in one embodiment of the present disclosure, the throttle valve 100 proposed in the present disclosure may further include two filter devices 300. The filter devices 300 are disposed in the valve tube 200, and the two filter devices 300 are respectively located on both sides of the throttle valve 100 in the axial direction. Specifically, the filter devices 300 may be filter meshes.

[0078] like Figure 2 As shown, in one embodiment of the present disclosure, the inner wall of the valve tube 200 may further be provided with a second protrusion 220, which can be used to limit the filter device 300. Furthermore, the second protrusion 220 can be formed by integrally stamping and bending the wall of the valve tube 200, further reducing material usage and weight.

[0079] For reference Figure 10 and Figure 11 , Figure 10 The sound pressure value cloud chart of the comparative throttle valve device in the noise test is shown in FIG1 . The so-called comparative throttle valve device can be understood as having a valve core that does not have a second portion 122 similar to the second portion 122 in the embodiment of the present disclosure. In this comparative throttle valve device, when the throttle valve is in the throttle state, the valve core and the matching surface at the valve hole interfere with each other, and the valve core does not have a portion located within the valve hole (but it does not rule out the possibility that the end portion of the matching surface of the valve core is squeezed into the valve hole due to extrusion, chamfering, tapering, or other factors). Figure 11 Representatively shown in Figure 1 The sound pressure value cloud diagram of the throttle valve device in the noise experiment is shown.

[0080] according to Figure 10 and Figure 11 As shown in the cloud diagram of the sound pressure values ​​of the throttle valve device of the present disclosure and the comparative example, it can be seen that the present disclosure can effectively improve the noise problem of the throttle valve device when the throttle valve 100 is in the throttle state.

[0081] It should be noted that the throttle valve devices shown in the drawings and described in this specification are only a few examples of the many types of throttle valve devices that can employ the principles of the present disclosure. It should be clearly understood that the principles of the present disclosure are in no way limited to any details or any components of the throttle valve devices shown in the drawings or described in this specification.

[0082] To sum up, the throttle valve device proposed in the present disclosure, by adopting the throttle valve 100 proposed in the present disclosure, can make the valve core 120 partially located in the valve hole 112 when the throttle valve 100 is in the throttling state. In this way, the distance between the outlet of the throttle hole 124 and the outlet of the valve hole 112 becomes smaller, and the flow area after the fluid passes through the throttle hole 124 will rapidly increase, thereby reducing the flow rate of the fluid and effectively reducing noise.

[0083] The exemplary embodiments of the throttle valve and throttle valve device proposed in the present disclosure are described and / or illustrated in detail above. However, the embodiments of the present disclosure are not limited to the specific embodiments described herein. On the contrary, the components and / or steps of each embodiment can be used independently and separately from the other components and / or steps described herein. Each component and / or each step of an embodiment can also be used in combination with other components and / or steps of other embodiments. When introducing the elements / components / etc. described and / or illustrated herein, the terms "one", "an" and "above" are used to indicate the presence of one or more elements / components / etc. The terms "comprising", "including" and "having" are used to express an open-ended inclusion and mean that in addition to the listed elements / components / etc., there may be additional elements / components / etc. In addition, the terms "first" and "second" in the claims and the specification are used only as marks and are not numerical limitations on their objects.

[0084] While the throttle valve and throttle valve apparatus disclosed herein have been described in terms of various specific embodiments, those skilled in the art will recognize that the disclosure can be practiced with modification within the spirit and scope of the claims.

Claims

1. A throttle valve (100), characterized in that: include: A valve seat (110) is provided with a valve core cavity (111) and a valve hole (112) axially connected to the throttle valve (100) in its interior, wherein the inner diameter of the valve core cavity (111) is larger than the aperture of the valve hole (112); the valve core cavity (111) and the valve hole (112) axially penetrate the valve seat (110); a first mating surface (114) is connected between the cavity wall of the valve core cavity (111) and the hole wall of the valve hole (112); A valve core (120) is disposed in the valve core cavity (111) and comprises a first portion (121) and a second portion (122) connected in the axial direction, wherein the outer diameter of the first portion (121) is greater than the aperture of the valve hole (112), and the outer diameter of the second portion (122) is less than or equal to the aperture of the valve hole (112); a second mating surface (123) is connected between the outer circumferential surface of the first portion (121) and the outer circumferential surface of the second portion (122); and the valve core (120) is provided with a throttling hole (124) extending in the axial direction. Wherein, when the throttle valve (100) is in a throttling state, the first mating surface (114) and the second mating surface (123) at least partially conflict with each other, and the second portion (122) is at least partially located in the valve hole (112).

2. The throttle valve (100) according to claim 1, characterized in that One end of the valve hole (112) away from the valve core cavity (111) opens to the first end face (113) of the valve seat (110), and the second part (122) has a second end face (1221) facing away from the first part (121); wherein, when the throttle valve (100) is in the throttling state, the ratio of the axial distance (L1) between the first end face (113) and the second end face (1221) to the length (L2) of the valve hole (112) is less than or equal to 0.

5.

3. The throttle valve (100) according to claim 1, characterized in that The valve seat (110) is provided with a flow channel opening (115), and the flow channel opening (115) penetrates the valve seat (110) radially along the throttle valve (100) and is connected to the valve core cavity (111); wherein, when the throttle valve (100) is in a throttling state, the first portion (121) covers the entire area of ​​the flow channel opening (115) in the axial direction.

4. The throttle valve (100) according to claim 3, characterized in that The first portion (121) has a third end surface (1211) facing away from the second portion (122), the third end surface (1211) is provided with a groove (1212), and the valve hole (112) is connected to the groove (1212).

5. The throttle valve (100) according to claim 1, characterized in that: The first mating surface (114) is a plane perpendicular to the axial direction, the second mating surface (123) is an inclined surface or an arc surface, and the connection between the first mating surface (114) and the inner wall of the valve hole (112) conflicts with the second mating surface (123); or The first mating surface (114) and the second mating surface (123) are inclined surfaces or arc surfaces with matching shapes.

6. The throttle valve (100) according to claim 1, characterized in that: One end of the valve hole (112) away from the valve core cavity (111) opens to the first end surface (113) of the valve seat (110), and the valve hole (112) is provided with an inverted slope structure or an inverted arc surface structure at the opening of the first end surface (113); and / or The orifice of the throttle hole (124) is provided with an inverted slope structure or an inverted arc surface structure.

7. A throttle valve device, characterized in that: The throttle valve device comprises the throttle valve (100) and the valve tube (200) according to any one of claims 1 to 6, and the throttle valve (100) is arranged in the valve tube (200).

8. The throttle valve device according to claim 7, characterized in that The ratio of the inner diameter of the valve tube (200) to the aperture of the throttle hole (124) is greater than or equal to 5.

9. The throttle valve device according to claim 7, characterized in that The outer wall of the valve seat (110) is provided with a first recess (116), and the inner wall of the valve tube (200) is provided with a first protrusion (210), and the first protrusion (210) cooperates with the first recess (116) to limit the throttle valve (100).

10. The throttle valve device according to claim 7, characterized in that The throttle valve (100) further comprises two filter devices (300), wherein the filter devices (300) are arranged in the valve tube (200), and the two filter devices (300) are respectively located on both sides of the throttle valve (100) in the axial direction.

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