Throttle valve

Abstract

The utility model relates to the technical field of valves, in particular to a throttling valve. The throttling valve comprises a valve body and a throttling assembly, a fluid channel is formed in the valve body, the throttling assembly is installed in the fluid channel, a throttling hole is formed in the throttling assembly and communicated with the fluid channel, and the inner diameter of the throttling hole is smaller than that of the fluid channel. A first buffering part is arranged in the fluid channel and comprises a first connecting hole section, a second connecting hole section and a third connecting hole section which are sequentially communicated, the first connecting hole section is arranged to be far away from the throttling assembly compared with the third connecting hole section in the flowing direction of fluid, and the inner diameter of the second connecting hole section is gradually reduced in the direction from the first connecting hole section to the third connecting hole section. According to the throttling valve, the problem that an existing throttling valve can generate large noise at the position of a throttling element is solved.

Description

Technical Field

[0001] This application relates to the field of valve technology, and in particular to a throttle valve. Background Technology

[0002] A throttling valve is a device that achieves throttling through an internal throttling element. This element has a small-diameter orifice, allowing the refrigerant to quickly reduce pressure after flowing through it. However, because the flow rate and velocity of the refrigerant change significantly as it flows through the orifice, the refrigerant generates considerable noise at the throttling element, thus affecting the user experience of the throttling valve. Utility Model Content

[0003] Therefore, it is necessary to provide a throttle valve to solve the problem that existing throttle valves generate significant noise at the throttle element.

[0004] This application provides a throttling valve, which includes a valve body and a throttling assembly. The valve body has a fluid channel, and the throttling assembly is installed in the fluid channel. The throttling assembly has a throttling orifice, which communicates with the fluid channel, and the inner diameter of the throttling orifice is smaller than the inner diameter of the fluid channel. The fluid channel has a first buffer section, which includes a first connection section, a second connection section, and a third connection section connected in sequence. Along the flow direction of the fluid, the first connection section is located further away from the throttling assembly than the third connection section, and the inner diameter of the second connection section gradually decreases from the first connection section to the third connection section.

[0005] In one embodiment, the inner diameter of the throttling orifice is A, the inner diameter of the third connecting segment is B, and the inner diameter of the first connecting segment is C, wherein A < B < C.

[0006] In one embodiment, the fluid channel has a first opening and a second opening at its two ends, and the first buffer is located on the side of the throttling component near the first opening, and / or the first buffer is located on the side of the throttling component near the second opening.

[0007] In one embodiment, the fluid channel is further provided with a second buffer section. Along the flow direction of the fluid, the second buffer section and the first buffer section are located on the same side of the throttling component, and the second buffer section is spaced apart from the first buffer section. The second buffer section includes a first through-hole section, a second through-hole section, and a third through-hole section connected in sequence. Along the flow direction of the fluid, the first through-hole section is located on the side of the third through-hole section away from the throttling component, and the inner diameter of the second through-hole section gradually decreases from the first through-hole section to the third through-hole section.

[0008] In one embodiment, the inner diameter of the throttling orifice is A, the inner diameter of the third connecting segment is B, the inner diameter of the first connecting segment (111) is C, and the inner diameter of the third through segment is D, wherein A < D ≤ B < C.

[0009] In one embodiment, the valve body has a valve cavity and a flow hole. The flow hole is located on the periphery of the valve cavity and communicates with the valve cavity. The flow hole and part of the valve cavity form the fluid channel. The first buffer part is located in the flow hole. The throttling component and the second buffer part are located in the valve cavity. The throttling valve also includes a shut-off valve core, which is movably installed in the valve cavity and located on the side of the second buffer part away from the throttling component. As the shut-off valve core moves along the axial direction of the valve cavity toward the second buffer part, the shut-off valve core can block the first through hole section.

[0010] In one embodiment, the end of the shut-off valve core is provided with a tapered portion, which can be partially inserted into the first through-hole section so that the sidewall of the tapered portion can abut against the first through-hole section and form a line seal.

[0011] In one embodiment, when the conical part abuts against the first through hole section, the end of the conical part is spaced apart from the end of the second through hole section near the first through hole section.

[0012] In one embodiment, the angle between the sidewall of the conical section and the plane perpendicular to the valve cavity axis is G, and the angle between the inner wall of the second through hole section and the plane perpendicular to the valve cavity axis is F, wherein G > F > 0.

[0013] In one embodiment, the valve body has a valve cavity, and the throttle valve further includes a shut-off valve core, a limiting member, a valve cap, a first filter structure, a second filter structure, and a first connecting pipe; the shut-off valve core is movably installed in the valve cavity, and a sealing groove is formed in the outer wall of the shut-off valve core. A sealing member is installed in the sealing groove, and the shut-off valve core is movably sealed to the inner wall of the valve cavity through the sealing member. A retaining groove is formed in the inner wall of the valve cavity, and the limiting member is installed in the retaining groove and at least partially protrudes from the retaining groove, so that the limiting member can axially stop against the shut-off valve core. At the end away from the throttling component, the valve cap is fitted onto the valve body at the end away from the throttling component and connected to the valve body; the first connecting pipe is located at the end of the throttling component away from the shut-off valve core, and the first connecting pipe is inserted into the valve cavity and connected to the valve body, wherein the outer periphery of the first filter structure is sandwiched between the end of the throttling component and the end of the first connecting pipe; the inner wall of the valve cavity protrudes to form a limiting portion, the limiting portion is located at the end of the throttling component near the shut-off valve core, wherein the outer periphery of the second filter structure is sandwiched between the limiting portion and the end of the throttling component.

[0014] Compared with the prior art, the throttle valve provided in this application can initially throttle the refrigerant in the second orifice section when the refrigerant enters the fluid channel inside the throttle valve, due to the variable diameter setting of the second orifice section, so as to reduce the flow rate of the refrigerant. This results in a smaller flow rate of the refrigerant when it flows to the throttle component, reducing the impact of the refrigerant on the throttle component. In this way, the noise generated at the throttle component can be reduced, effectively improving the user experience of the throttle valve. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 A cross-sectional view of a throttle valve according to an embodiment provided in this application;

[0017] Figure 2 A cross-sectional view of a throttle valve according to another embodiment provided in this application;

[0018] Figure 3 for Figure 2 A magnified view of point Q in the middle.

[0019] The symbols in the diagram represent the following meanings:

[0020] 100. Throttling valve; 10. Valve body; 101. Fluid passage; 102. Valve chamber; 1021. First opening; 1022. Third opening; 1023. Slot; 103. Flow hole; 1031. Second opening; 11. First buffer section; 111. First connecting hole section; 112. Second connecting hole section; 113. Third connecting hole section; 12. Second buffer section; 121. First through hole section; 122. Second through hole section; 123. Third through hole section; 13. Limiting element; 14. Valve cap; 15. Limiting part; 20. Throttling assembly; 201. Throttling orifice; 21. Throttling valve seat; 22. Throttling valve core; 30. Shut-off valve core; 301. Sealing groove; 31. Conical part; 32. Sealing element; 40. First connecting pipe; 50. First filter structure; 60. Second filter structure. Detailed Implementation

[0021] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0022] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0023] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0024] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0025] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0026] A throttling valve is a device that achieves throttling through an internal throttling element. This element has a small-diameter orifice, allowing the refrigerant to quickly reduce pressure after flowing through it. However, because the flow rate and velocity of the refrigerant change significantly as it flows through the orifice, the refrigerant generates considerable noise at the throttling element, thus affecting the user experience of the throttling valve.

[0027] Please see Figures 1-3 This application provides a throttling valve 100, which includes a valve body 10 and a throttling assembly 20. A fluid passage 101 is formed within the valve body 10, and the throttling assembly 20 is installed within the fluid passage 101. A throttling orifice 201 is formed on the throttling assembly 20, communicating with the fluid passage 101. The inner diameter of the throttling orifice 201 is smaller than the inner diameter of the fluid passage 101, thereby achieving throttling of the fluid (such as refrigerant). A first buffer section 11 is provided within the fluid passage 101. The first buffer section 11 includes a first connecting section 111, a second connecting section 112, and a third connecting section 113 connected sequentially. Along the fluid flow direction, the first connecting section 111 is positioned further away from the throttling assembly 20 than the third connecting section 113. Furthermore, from the first connecting section 111 to the third connecting section 113, the inner diameter of the second connecting section 112 gradually decreases.

[0028] Understandably, when refrigerant enters the fluid passage 101 within the throttle valve 100, due to the variable diameter setting of the second connection section 112, the refrigerant can be initially throttled in the second connection section 112 to reduce the flow rate of the refrigerant. This results in a smaller flow rate of the refrigerant when it subsequently flows onto the throttle assembly 20, reducing the impact of the refrigerant on the throttle assembly 20. In this way, the noise generated at the throttle assembly 20 can be reduced, effectively improving the user experience of the throttle valve 100.

[0029] Specifically, when the refrigerant in the fluid channel 101 flows to the first buffer section 11, it flows sequentially through the first connecting section 111, the second connecting section 112, and into the third connecting section 113. According to Bernoulli's equation and the principle of fluid continuity, as the inner diameter of the second connecting section 112 gradually decreases, the refrigerant velocity gradually increases, resulting in a gradual pressure reduction. Simultaneously, strong disturbances and eddies occur before and after the refrigerant flows through the second connecting section 112, causing irreversible pressure loss and further reducing the fluid pressure. This also results in energy loss, allowing the refrigerant flowing through the first buffer section 11 to achieve throttling and gradually reach a stable pressure state, which helps reduce noise.

[0030] Furthermore, the inner diameter of the throttling orifice 201 is A, the inner diameter of the third connecting section 113 is B, and the inner diameter of the first connecting section 111 is C, where A < B < C. Thus, by reasonably setting the inner diameter of the third connecting section 113, the flow rate can be reduced while avoiding a significant impact on the flow capacity, and the throttling effect of the throttling component 20 on the refrigerant can be guaranteed.

[0031] Since air conditioning systems typically operate in both cooling and heating modes, the refrigerant flow direction within the expansion valve 100 differs between these modes. Specifically, the fluid channel 101 has a first opening 1021 and a second opening 1031 at its two ends. Refrigerant can flow into the fluid channel 101 through the first opening 1021 and out through the second opening 1031 after being throttled by the expansion assembly 20; alternatively, refrigerant can flow into the fluid channel 101 through the second opening 1031 and out through the first opening 1021 after being throttled by the expansion assembly 20. Therefore, to ensure that the refrigerant flowing through the expansion assembly 20 does not generate significant noise in either cooling or heating modes, a first buffer section 11 is provided in both the side of the expansion assembly 20 near the first opening 1021 and the side of the expansion assembly 20 near the second opening 1031 within the fluid channel 101.

[0032] Of course, the first buffer part 11 may also be provided only on the side of the throttling component 20 near the first opening 1021, or the first buffer part 11 may also be provided only on the side of the throttling component 20 near the second opening 1031, so as to achieve the noise reduction requirement of a single mode.

[0033] In one embodiment, such as Figure 1 and Figure 2 As shown, the valve body 10 has a valve cavity 102 and a flow hole 103. The flow hole 103 is located on the periphery of the valve cavity 102 and communicates with the valve cavity 102. The flow hole 103 and part of the valve cavity 102 form a fluid channel 101. For ease of explanation, in this embodiment, the first opening 1021 is defined as the opening at one end of the valve cavity 102 along its own axial direction, and the second opening 1031 is the opening at the end of the flow hole 103 away from the valve cavity 102. Furthermore, the example is that the first buffer part 11 is located in the flow hole 103 and the throttling component 20 is located in the valve cavity 102.

[0034] Furthermore, a second buffer section 12 is also provided within the fluid channel 101. Along the fluid flow direction, the second buffer section 12 and the first buffer section 11 are located on the same side of the throttling assembly 20, and the second buffer section 12 is spaced apart from the first buffer section 11. The second buffer section 12 includes a first through-hole section 121, a second through-hole section 122, and a third through-hole section 123 connected in sequence. Along the fluid flow direction, the first through-hole section 121 is located on the side of the third through-hole section 123 away from the throttling assembly 20, and the inner diameter of the second through-hole section 122 gradually decreases from the first through-hole section 121 to the third through-hole section 123. Similarly, the second buffer section 12 achieves a throttling effect through the variable diameter of the second through-hole section 122. Thus, through the cooperation of the first buffer section 11 and the second buffer section 12, the refrigerant flow rate through the throttling assembly 20 can be further reduced, achieving noise reduction.

[0035] Specifically, in this embodiment, the second buffer section 12 is disposed inside the valve chamber 102. In this way, the refrigerant entering the fluid channel 101 from the second opening 1031 can first be throttled by the first buffer section 11, and then throttled by the second buffer section 12, thereby further reducing the refrigerant flow rate and helping to further reduce the noise generated when the refrigerant flows through the throttling assembly 20.

[0036] In order to ensure that the throttling component 20 can throttle smoothly while maintaining the flow capacity of the fluid channel 101, in one embodiment, such as Figure 3 As shown, the inner diameter of the third through-hole section 123 is D, where A < D ≤ B < C. Thus, the refrigerant can achieve three throttling operations within the throttling valve 100.

[0037] In one embodiment, such as Figures 1-3 As shown, the throttle valve 100 also includes a shut-off valve core 30, which is movably mounted within the valve cavity 102 and located on the side of the second buffer section 12 away from the throttle assembly 20. As the shut-off valve core 30 moves axially along the valve cavity 102 toward the second buffer section 12, it can block the first through-hole section 121. That is, the second buffer section 12 can cooperate with the shut-off valve core 30 to achieve the opening and closing of the fluid passage 101.

[0038] Specifically, the end of the shut-off valve core 30 is provided with a conical portion 31, which can be partially inserted into the first through-hole section 121 so that the sidewall of the conical portion 31 can abut against the first through-hole section 121 and form a line seal. In this way, the sealing performance of the throttle valve 100 in the closed state can be guaranteed, and the fit between the shut-off valve core 30 and the second buffer part 12 is simple and easy to process.

[0039] Furthermore, when the conical part 31 abuts against the first through hole section 121, that is, when the throttle valve 100 is closed, the end of the conical part 31 is spaced apart from the end of the second through hole section 122 near the first through hole section 121, so as to prevent the shut-off valve core 30 from interfering with the second through hole section 122 when the valve is closed, and further ensure the sealing between the shut-off valve core 30 and the first through hole section 121, which is beneficial to prevent leakage.

[0040] The angle between the sidewall of the conical section 31 and the plane perpendicular to the axis of the valve cavity 102 is G, and the angle between the inner wall of the second through-hole section 122 and the plane perpendicular to the axis of the valve cavity 102 is F, where G > F > 0. This increases the slope of the second through-hole section 122, reduces machining difficulty, and thus increases the service life of machining tools, etc.

[0041] In one embodiment, a sealing groove 301 is formed in the outer wall of the shut-off valve core 30, and a sealing element 32 is installed in the sealing groove 301. The shut-off valve core 30 is in a movable sealing fit with the inner wall of the valve cavity 102 through the sealing element 32. In this way, the sealing performance of the shut-off valve core 30 when it moves in the valve cavity 102 can be guaranteed.

[0042] Here, the opening of the valve cavity 102 away from the first opening 1021 along its own axial direction can be defined as the third opening 1022, and the shut-off valve core 30 is installed in the valve cavity 102 through the third opening 1022. To prevent the shut-off valve core 30 from detaching from the third opening 1022 during use, in one embodiment, the throttle valve 100 further includes a limiting member 13. A groove 1023 is recessed into the inner wall of the valve cavity 102, and the limiting member 13 is installed in the groove 1023 and at least partially protrudes from it, so that the limiting member 13 can axially stop the shut-off valve core 30 at the end away from the throttle assembly 20. Thus, the limiting member 13 can limit the movement of the shut-off valve core 30 toward the third opening 1022, ensuring the safety of the shut-off valve core 30's movement.

[0043] Furthermore, the throttle valve 100 also includes a valve cap 14, which is sleeved on the end of the valve body 10 away from the throttle assembly 20 and connected to the valve body 10. It is easy to understand that the valve cap 14 can seal the third opening 1022 to prevent external impurities from entering the valve cavity 102, thereby ensuring the reliability of the throttle valve 100 during long-term use.

[0044] In one embodiment, such as Figure 1 and Figure 2 As shown, the throttle valve 100 also includes a first connecting pipe 40 and a second connecting pipe (not shown). The first connecting pipe 40 is located at the end of the throttle assembly 20 away from the shut-off valve core 30, and the first connecting pipe 40 is inserted into the valve cavity 102 and connected to the valve body 10. That is, the first connecting pipe 40 is connected to the first opening 1021, and the second connecting pipe is connected to the second opening 1031.

[0045] Because the orifice 201 on the throttling assembly 20 has a small diameter, if there are impurities in the refrigerant, it is very easy to clog the orifice 201, affecting the normal operation of the throttling assembly 20. Therefore, in order to prevent impurities in the refrigerant from clogging the orifice 201, in one embodiment, the throttling valve 100 further includes a first filter structure 50 and a second filter structure 60. The first filter structure 50 and the second filter structure 60 are respectively installed at opposite ends of the throttling assembly 20 along the axial direction, so as to ensure that the refrigerant can be filtered before entering the throttling assembly 20 for throttling when flowing in both cooling and heating modes.

[0046] Specifically, the outer periphery of the first filter structure 50 is sandwiched between the ends of the throttling assembly 20 and the first connecting pipe 40, and the first filter structure 50, the throttling assembly 20, and the first connecting pipe 40 can be fixed by welding, ensuring reliable connection and convenient operation. Furthermore, a limiting part 15 protrudes from the inner wall of the valve cavity 102, and the limiting part 15 is located at the end of the throttling assembly 20 near the shut-off valve core 30. The outer periphery of the second filter structure 60 is sandwiched between the limiting part 15 and the end of the throttling assembly 20. In this way, the installation of the second filter structure 60 is achieved, and the throttling assembly 20 is also confined between the limiting part 15 and the first connecting pipe 40, ensuring the reliability of the throttling assembly 20 installation.

[0047] In one embodiment, such as Figure 1 and Figure 2 As shown, the throttling assembly 20 includes a throttling valve seat 21 and a throttling valve core 22. The throttling valve seat 21 is installed in the valve cavity 102, and the throttling valve core 22 is movably installed in the throttling valve seat 21. In cooling and heating modes, the throttling valve core 22 can slide in the throttling valve seat 21 to achieve different flow regulation functions.

[0048] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0049] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A throttle valve comprising a valve body (10) and a throttle assembly (20), a fluid passage (101) being formed in the valve body (10), the throttle assembly (20) being installed in the fluid passage (101), a throttle hole (201) being formed in the throttle assembly (20) and communicating with the fluid passage (101), and an inner diameter of the throttle hole (201) being smaller than an inner diameter of the fluid passage (101). characterized in that A first buffer portion (11) is arranged in the fluid passage (101), the first buffer portion (11) comprising a first connecting hole section (111), a second connecting hole section (112) and a third connecting hole section (113) which are sequentially communicated, and the first connecting hole section (111) is arranged away from the throttle assembly (20) compared with the third connecting hole section (113) along a flow direction of fluid, and an inner diameter of the second connecting hole section (112) gradually decreases from the first connecting hole section (111) to the third connecting hole section (113).

2. The throttle valve according to claim 1, characterized by An inner diameter of the throttle hole (201) is A, an inner diameter of the third connecting hole section (113) is B, and an inner diameter of the first connecting hole section (111) is C, wherein A < B < C.

3. The throttle valve according to claim 1, characterized by First and second openings (1021 and 1031) are respectively arranged at two ends of the fluid passage (101), the first buffer portion (11) is arranged on a side of the throttle assembly (20) close to the first opening (1021), and / or the first buffer portion (11) is arranged on a side of the throttle assembly (20) close to the second opening (1031).

4. The throttle valve according to any one of claims 1 to 3, characterized by A second buffer portion (12) is further arranged in the fluid passage (101), the second buffer portion (12) and the first buffer portion (11) are arranged on the same side of the throttle assembly (20) along the flow direction of fluid, and the second buffer portion (12) is arranged away from the first buffer portion (11). The second buffer portion (12) comprises a first through hole section (121), a second through hole section (122) and a third through hole section (123) which are sequentially communicated, the first through hole section (121) is arranged on a side of the third through hole section (123) away from the throttle assembly (20) along the flow direction of fluid, and an inner diameter of the second through hole section (122) gradually decreases from the first through hole section (121) to the third through hole section (123).

5. The throttle valve according to claim 4, characterized by An inner diameter of the throttle hole (201) is A, an inner diameter of the third connecting hole section (113) is B, an inner diameter of the first connecting hole section (111) is C, and an inner diameter of the third through hole section (123) is D, wherein A < D ≤ B < C.

6. The throttle valve according to claim 4, characterized by The valve body (10) is provided with a valve cavity (102) and a flow-through hole (103), the flow-through hole (103) is arranged on the circumferential side of the valve cavity (102) and communicates with the valve cavity (102), and the flow-through hole (103) and part of the valve cavity (102) form the fluid passage (101), the first buffer part (11) is arranged in the flow-through hole (103), the throttling assembly (20) and the second buffer part (12) are arranged in the valve cavity (102); The throttle valve further comprises a stop valve core (30), the stop valve core (30) is movably installed in the valve cavity (102), and is located on the side of the second buffer part (12) away from the throttling assembly (20); Wherein, with the movement of the stop valve core (30) along the axial direction of the valve cavity (102) towards the second buffer part (12), the stop valve core (30) can be blocked in the first through hole section (121).

7. The throttle valve according to claim 6, characterized by The end of the stop valve core (30) is provided with a conical surface part (31), the conical surface part (31) can be partially inserted into the first through hole section (121), so that the side wall of the conical surface part (31) can abut against the first through hole section (121) and form a linear seal.

8. The throttle valve according to claim 7, characterized by When the conical surface part (31) abuts against the first through hole section (121), the end of the conical surface part (31) is spaced apart from one end of the second through hole section (122) close to the first through hole section (121).

9. The throttle valve of claim 7, wherein The included angle between the side wall of the conical surface part (31) and the plane perpendicular to the axis of the valve cavity (102) is G, and the included angle between the inner wall of the second through hole section (122) and the plane perpendicular to the axis of the valve cavity (102) is F, wherein G>F>0.

10. The throttle valve of claim 1, wherein The valve body (10) is provided with a valve cavity (102), the throttle valve further comprises a stop valve core (30), a limiting piece (13), a valve cap (14), a first filter structure (50), a second filter structure (60) and a first connecting pipe (40); The stop valve core (30) is movably installed in the valve cavity (102), and the outer wall of the stop valve core (30) is recessed to form a sealing groove (301), a sealing piece (32) is installed in the sealing groove (301), and the stop valve core (30) is movably sealed with the inner wall of the valve cavity (102) through the sealing piece (32), wherein the inner wall of the valve cavity (102) is recessed to form a clamping groove (1023), the limiting piece (13) is installed in the clamping groove (1023) and at least partially protrudes from the clamping groove (1023), so that the limiting piece (13) can be axially stopped at one end of the stop valve core (30) away from the throttling assembly (20), and the valve cap (14) is sleeved on one end of the valve body (10) away from the throttling assembly (20) and connected with the valve body (10); The first connecting pipe (40) is arranged at one end of the throttling assembly (20) away from the stop valve core (30), and the first connecting pipe (40) is inserted into the valve cavity (102) and connected with the valve body (10), wherein the outer periphery of the first filter structure (50) is clamped between the throttling assembly (20) and the end of the first connecting pipe (40); The inner wall of the valve cavity (102) is protruded to form a limiting portion (15), and the limiting portion (15) is arranged at one end of the throttling assembly (20) close to the stop valve core (30), wherein the outer periphery of the second filter structure (60) is clamped between the limiting portion (15) and the end of the throttling assembly (20).

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