WO2022048260A1

WO2022048260A1 - Throttle valve device

Info

Publication number: WO2022048260A1
Application number: PCT/CN2021/102385
Authority: WO
Inventors: 寿杰; 陈狄永; 冯光华; 周峰
Original assignee: 浙江盾安人工环境股份有限公司
Priority date: 2020-09-07
Filing date: 2021-06-25
Publication date: 2022-03-10
Also published as: KR20230058162A; CN213685322U; JP2023540876A

Abstract

A throttle valve device, comprising: a valve seat (10) provided with a first containing cavity; a throttling valve element (20) which is arranged in the first containing cavity and is provided with a first throttling hole (21) and a second throttling hole (22a) or an overflow hole (22b); a first filter assembly (40) which comprises a first positioning convex edge (42) and a first filter body (41) covering the first throttling hole (21), the first positioning convex edge (42) abutting against a first end of the throttling valve element (20); and a second filter assembly (50) which comprises a second filter body (51) and a second positioning convex edge (52), wherein the second positioning convex edge (52) abuts against a second end of the throttling valve element (20), and the second filter body (51) covers the second throttling hole (22a) or the overflow hole (22b).

Description

Throttle valve device

Related applications

This application claims the priority of the Chinese patent application filed on September 7, 2020, the application number is 202021936061.6, and the invention name is "throttle valve device", the entire content of which is incorporated into this application by reference.

technical field

The present application relates to the technical field of throttling, in particular to a throttling valve device.

Background technique

The throttle device is a valve that controls the flow of fluid by changing the throttling section or the throttling length. In order to prevent the fluid from being polluted by impurities, it is necessary to install a filter screen to filter the fluid in the orifice or flow-through hole on the throttling valve core. When the traditional throttle valve device is provided with a filter screen at one end away from the nozzle, because there is no contact function of the nozzle, a step is usually set on the outer wall of the throttle valve core, and the filter screen contacts with the step and covers the throttle valve core. It is far from the end of the nozzle to filter the end, which affects the normal use of the throttle valve core to a certain extent, and the size of the throttle valve core needs to be reduced because it needs to extend into the filter screen, which requires more processing accuracy. At the same time, it is necessary to set steps on the outer wall of the throttle valve core, which also makes the processing process more complicated.

SUMMARY OF THE INVENTION

Based on this, the present application is aimed at overcoming that the throttle valve device of the related art affects the normal use of the throttle valve core, and the throttle valve core is reduced, which requires higher machining accuracy. It also makes the processing technology more complicated, and provides a throttle valve device.

Its technical solutions are as follows:

A throttle valve device, comprising:

The valve seat is provided with a first accommodating cavity, and a first interface and a second interface respectively communicating with the first accommodating cavity;

The throttle valve core is arranged in the first accommodating cavity, the first end of the throttle valve core is provided with a first throttle hole, and the second end of the throttle valve core is provided with the first throttle hole. an overflow hole communicated with the throttle hole; the first end of the throttle valve core is the end where the first interface is located, and the second end of the throttle valve core is the end where the second interface is located;

The first filter assembly includes a first filter body and a first positioning protruding edge arranged on the outer periphery of the first filter body, the first positioning protruding edge is in contact with the first end of the throttle valve core, and the the first filter body covers the first throttle hole;

The second filter assembly includes a second filter body and a second positioning protruding edge disposed on the outer periphery of the second filter body, the second positioning protruding edge is in contact with the second end of the throttle valve core, and the the second filter body covers the flow hole;

The distance between the first positioning protrusion and the second positioning protrusion is greater than or equal to the length of the first throttle hole, or between the first positioning protrusion and the second positioning protrusion The distance is greater than or equal to the length of the flow hole.

The throttle valve device of the technical solution can complete the assembly of the filter screen without setting steps on the outer wall of the throttle valve core, which simplifies the processing flow of the throttle valve core, and at the same time, it does not need to cover the filter screen to cover the throttle valve core. The end of the throttling valve is filtered away from the end of the nozzle, that is, the end of the throttle valve core away from the nozzle does not need to extend into the filter screen, thereby avoiding the reduction of the outer diameter of the end of the throttle valve core, reducing the processing difficulty and increasing the filter component. effective filter area.

Specifically, when the throttle valve device of the present technical solution is assembled, the second filter assembly, the throttle valve core and the first filter assembly are sequentially put into the first accommodating cavity through the first interface, or the second filter After the assembly, the throttle valve core and the first filter assembly are assembled, they are put into the first accommodating cavity through the first interface, and the second positioning protrusion directly abuts the second end of the throttle valve core, rather than through the throttle valve. A step is set at the position of the flow valve core close to the second end to abut with the second positioning protrusion, and the second filter body covers the flow hole, so as to achieve the effect of filtering the fluid. Finally, insert a nozzle that matches the diameter of the first interface at the first interface, and the port of the nozzle abuts against the first positioning ledge, so that the first position is fixed by the pressing action between the nozzle and the first throttle spool. The protruding edge is pressed between the nozzle and the throttle valve core, and plays a role in positioning the first filter assembly, and at the same time, the first filter body covers the first throttle hole to achieve the filtering effect of the fluid. Therefore, the technical solution not only requires no additional processing of the throttle valve core, but also has the effect of double filtering, which reduces the difficulty of processing and ensures the filtering effect.

In one embodiment, the throttle valve further includes a nozzle, the nozzle is connected with the first interface, and the end of the nozzle is connected to the first positioning protrusion or the second positioning protrusion along abutment.

In one embodiment, the inner wall of the valve seat is provided with a first positioning step matched with the second positioning protrusion, and the end of the connecting tube abuts with the first positioning protrusion.

In one embodiment, the first positioning protrusion and the second positioning protrusion are positioning grids extending in the radial direction of the throttle valve.

In one embodiment, the first filter body is a hat-shaped filter screen with grooves, and the first positioning ledge is a positioning mesh frame fixed at the notch of the groove; and/or , the second filter body is a hat-shaped filter screen with grooves, and the second positioning convex edge is a positioning mesh frame fixed at the notch of the groove.

In one of the embodiments, the concave direction of the groove of the first filter body is a direction away from the throttle valve core; and/or, the concave direction of the groove of the second filter body is away from the direction the direction of the throttle spool.

In one of the embodiments, the first positioning protrusion directly abuts the first end of the throttle valve core; or, the throttle valve core is close to the first end of the throttle valve core The outer wall is provided with a second positioning step, and the first positioning convex edge abuts with the second positioning step.

In one embodiment, the throttle valve core further includes an intermediate throttle hole disposed between the first throttle hole and the flow-through hole, and the intermediate throttle hole communicates with the first throttle hole orifice and the overflow hole.

In one embodiment, the throttle valve core includes a fixed valve core provided with a second accommodating cavity, and a movable valve core set in the second accommodating cavity; the first throttle hole is provided in the the first end of the fixed valve core, the flow hole is provided at the second end of the fixed valve core, the first throttle hole and the flow hole are both communicated with the second accommodating cavity; The movable valve core is provided with a third throttle hole, and the third throttle hole communicates with the first throttle hole and the second accommodating cavity.

Because the throttling valve core of this technical solution does not need to extend into the second filter body, and the end close to the second filter screen is the end where the second accommodating cavity is provided, therefore, through this arrangement of the technical solution, there is no need to reduce the throttling The outer diameter of the end of the flow valve core, thus ensuring the space of the second accommodating chamber to a certain extent and maximizing the size of the movable valve core. Thereby reducing the difficulty of processing. On the other hand, the large-sized movable spool also reduces the risk of rollover during operation to a certain extent. Therefore, the matching relationship between the second filter assembly and the throttle spool in this embodiment is also The reliability of the operation of the entire throttle valve device is guaranteed.

In one of the embodiments, the outer wall of the second accommodating cavity matches the inner diameter of the first accommodating cavity.

In one embodiment, the first positioning protrusion abuts against the first end of the fixed valve core; or, an outer wall of the fixed valve core close to the first end of the fixed valve core is provided with a third positioning step, the first positioning protrusion abuts against the third positioning step.

In one of the embodiments, the distance between the first filter assembly and the second filter assembly is greater than or equal to 5 mm.

Description of drawings

The accompanying drawings constituting a part of the present application are used to provide further understanding of the present application, and the schematic embodiments and descriptions of the present application are used to explain the present application and do not constitute an improper limitation of the present application.

In order to illustrate the technical solutions in the embodiments of the present application more clearly, the following briefly introduces the drawings that are used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

FIG. 1 is a schematic structural diagram of the throttle valve device according to the first embodiment of the application;

FIG. 2 is a schematic structural diagram of the throttle valve core according to the first embodiment of the application;

3 is an exploded schematic diagram of the throttle valve core according to the first embodiment of the application;

4 is a schematic structural diagram of the throttle valve device according to the second embodiment of the application;

FIG. 5 is a schematic structural diagram of the throttle valve core according to the second embodiment of the application;

FIG. 6 is an exploded schematic diagram of the throttle valve core according to the second embodiment of the application.

Description of reference numbers:

10, valve seat; 11, first interface; 12, second interface; 13, first positioning step; 20, throttle valve core; 21, first throttle hole; 22a, second throttle hole; 22b, pass Flow hole; 23, fixed valve core; 231, positioning part; 232, third positioning step; 24, movable valve core; 30, take over; 40, first filter assembly; 41, first filter body; 42, first positioning 50, the second filter assembly; 51, the second filter body; 52, the second positioning convex edge.

detailed description

In order to make the above objects, features and advantages of the present application more clearly understood, the specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.

Example 1

A throttle valve device as shown in Figures 1-3, comprising:

The valve seat 10 is provided with a first accommodating cavity, and a first interface 11 and a second interface 12 respectively communicating with the first accommodating cavity;

The throttle valve core 20 is arranged in the first accommodating cavity, the first end of the throttle valve core 20 is provided with a first throttle hole 21 , and the second end of the throttle valve core 20 is provided with a first throttle hole 21 . The first orifice 21 communicates with the overflow hole 22b; the first end of the throttle valve core 20 is close to the end where the first interface 11 is located, and the second end of the throttle valve core 20 is close to the end of the first interface 11 the end where the second interface 12 is located;

The nozzle 30 is matched and connected with the first interface 11, and the end of the nozzle 30 is in contact with the first filter assembly 40. In this embodiment, the nozzle 30 is plugged and matched with the first interface 11;

The first filter assembly 40 includes a first filter body 41 and a first positioning ledge 42 disposed on the outer periphery of the first filter body 41 , and the first positioning ledge 42 is located on the nozzle 30 and the throttle valve between the cores 20, and the first filter body 41 covers the first throttle hole 21;

The second filter assembly 50 includes a second filter body 51 and a second positioning convex edge 52 disposed on the outer periphery of the second filter body 51 , the second positioning convex edge 52 is connected to the second The ends abut, and the second filter body 51 covers the flow hole 22b. The first filter body 41 and the second filter body 51 in this embodiment are both filter screens.

The distance between the first positioning protrusion 42 and the second positioning protrusion 52 is greater than or equal to the length of the first throttle hole 21 , or the distance between the first positioning protrusion 42 and the second positioning protrusion 52 is greater than or equal to The length of the flow hole 22b.

The throttle valve device of this embodiment can complete the assembly of the filter screen without setting steps on the outer wall of the throttle valve core 20 , which simplifies the processing flow of the throttle valve core 20 , and at the same time does not need to cover the throttle valve with the filter screen. The end of the core 20 that is far away from the nozzle 30 is filtered, that is, the end of the throttle valve core 20 away from the nozzle 30 does not need to protrude into the filter screen, so as to avoid the reduction of the outer diameter of the end of the throttle valve core 20 and reduce the The processing difficulty increases the effective filtering area of the filter assembly.

Specifically, when the throttle valve device of this embodiment is assembled, the second filter assembly 50 , the throttle valve core 20 and the first filter assembly 40 are sequentially put into the first accommodating cavity through the first interface 11 , or After the second filter assembly 50 , the throttle valve core 20 and the first filter assembly 40 are assembled, they are put into the first accommodating cavity through the first interface 11 , and the second positioning convex edge 52 is directly connected with the first filter member 20 of the throttle valve core 20 . The two ends abut, instead of abutting with the second positioning protrusion 52 by setting a step at the position of the throttle valve core 20 close to the second end, and the second filter body 51 covers the flow hole 22b, so as to prevent the fluid filter effect. Finally, a nozzle 30 that matches the diameter of the first interface 11 is inserted into the first port 11 , and the port of the nozzle 30 abuts against the first positioning flange 42 , so that the pressure between the nozzle 30 and the first throttle valve core 20 can pass through the pressure. The tightening effect, the first positioning convex edge 42 is pressed between the nozzle 30 and the throttle valve core 20, which plays a positioning role for the first filter assembly 40, and the first filter body 41 covers the first throttle hole 21. To achieve the filtering effect of the fluid. Therefore, the present embodiment not only requires no additional processing of the throttle valve core 20, but also has the effect of double filtering, which reduces the difficulty of processing and ensures the filtering effect.

In order to ensure that the second filter assembly 50 will not move after being installed in the valve seat 10, so as to facilitate the positioning of the throttle valve core 20 and the first filter assembly 40 to be assembled later, the inner wall of the valve seat 10 in this embodiment is provided with The first positioning step 13 matched with the second positioning convex edge 52 . By abutting and cooperating with the first positioning step 13 and the first positioning convex edge 42 , the first positioning convex edge 42 is limited to prevent the first filter assembly 40 from moving.

In other embodiments, the inner diameter of the first accommodating cavity of the valve seat 10 at the position of the above-mentioned first positioning step 13 can also be reduced and matched with the first positioning protrusion 42 to achieve the first positioning protrusion. 42, without additionally disposing the first positioning step 13.

In other embodiments, the end of the nozzle 30 can also be in contact with the second filter assembly 50, that is, the second end of the throttle valve core is installed close to the end where the first interface is located, and the first end is close to the end where the second interface is located. , the nozzle 30 is in contact with the second positioning convex edge 52 .

The first positioning protruding edge 42 and the second positioning protruding edge 52 described in this embodiment are configured as positioning grids extending along the radial direction of the throttle valve.

In this embodiment, the first filter body 41 is a hat-shaped filter screen with grooves, and the first positioning protrusion 42 is a positioning mesh frame fixed at the notch of the groove. In other embodiments, the shape of the first filter body 41 can also be set to other shapes.

Specifically, the concave direction of the groove of the first filter body 41 is the direction away from the throttle valve core 20, so that the distance between the first filter body 41 and the second filter body 51 can be increased, achieve better filtering effect.

Similarly, in this embodiment, the second filter body 51 is a hat-shaped filter screen with grooves, and the second positioning protruding edge 52 is a positioning mesh frame fixed at the notch of the groove. In other embodiments, the shape of the second filter body 51 can also be set to other shapes.

In addition, the concave direction of the groove of the second filter body 51 in this embodiment is the direction away from the throttle valve core 20 , thereby further increasing the distance between the first filter body 41 and the second filter body 51 . distance. The throttle valve core 20 in this embodiment includes a fixed valve core 23 provided with a second accommodating cavity, and a movable valve core 24 provided in the second accommodating cavity, that is, the throttle valve core 20 in this embodiment is A valve core structure that can realize throttling under both cooling and heating conditions; the fixed valve core 23 includes a first throttle hole 21 and an overflow hole 22b, and the first throttle hole 21 is provided in the fixed valve core 23 The first end of the valve core 23 and the second end of the fixed valve core 23 are the flow holes 22b. The first end of the valve core 23 is the end close to the nozzle 30 . The movable valve core 24 is provided with a third throttle hole, and the third throttle hole communicates with the first throttle hole 21 and the second accommodating cavity to achieve the effect of fluid communication.

Since the throttle valve core 20 of this embodiment does not need to extend into the second filter body 51, and the end close to the second filter screen is the end where the second accommodating cavity is provided, the arrangement of this embodiment does not require The outer diameter of the end of the throttle spool 20 is reduced, thereby ensuring the space of the second accommodating chamber to a certain extent and maximizing the size of the movable spool 24. On the one hand, the large-sized movable spool 24 is easier to process, and more It is easy to ensure the machining accuracy, thereby reducing the difficulty of machining. On the other hand, the large-sized movable spool 24 also reduces the risk of rollover during operation to a certain extent. Therefore, the cooperation between the second filter assembly 50 and the throttle spool 20 in this embodiment is It also ensures the reliability of the operation of the entire throttle valve device.

In this embodiment, the outer wall of the second accommodating cavity matches the inner diameter of the first accommodating cavity, so as to maximize the space of the second accommodating cavity. In addition, the fixed valve core 23 of the present embodiment is provided with a positioning portion 231 that cooperates with the second positioning protrusion 52 near the opening of the second accommodating cavity of the second filter assembly 50 . The positioning portion 231 is a positioning ring inclined toward the central axis of the second accommodating cavity, so that the edge of the positioning ring is abutted and matched with the second positioning convex edge 52 to further ensure the gap between the throttle valve core 20 and the second filter assembly 50 the abutment stability.

In this embodiment, a third positioning step 232 is provided on the outer wall of the fixed valve core 23 near the first end of the first filter assembly 40 , and the first positioning protrusion 42 abuts against the third positioning step 232 catch. That is, by extending the end of the first throttle hole 21 into the first filter body 41 , the space between the first positioning protrusion 42 and the second positioning protrusion 52 can be shortened under the condition that the length of the valve seat 10 is limited. distance, saving length space. In addition, since the first end of the fixed spool 23 of the present embodiment is used to provide the first orifice 21 instead of the second accommodating cavity, even if the outer diameter of the first end of the fixed spool 23 is reduced to form a step, It will not affect its own function, but can save space when needed.

In other embodiments, it can also be configured that the first positioning protrusion 42 is in direct contact with the first end of the fixed valve core 23 , and the third positioning step 232 does not need to be provided. Specifically, set according to actual needs.

The distance between the first filter assembly 40 and the second filter assembly 50 in this embodiment is greater than or equal to 5 mm, so as to achieve a better filtering effect.

Embodiment 2

As shown in FIGS. 4-6 , the structure and principle of this embodiment are similar to those of the first embodiment, the difference is that the throttle valve core 20 in this embodiment is only provided with a fixed valve core, and the throttle valve core 20 is only provided with a fixed valve core. The second end of the core 20 is provided with a second throttle hole 22 a, which is an overflow hole; the first positioning protrusion 42 is in contact with the first end of the throttle valve core 20 .

Alternatively, in other embodiments, a second positioning step is provided on the throttle valve core 20 near the first end of the first filter assembly 40 , and the first positioning protrusion 42 is connected to the second positioning step. The steps meet.

In addition, in other embodiments, the throttle valve core further includes an intermediate throttle hole provided between the first throttle hole 21 and the second throttle hole 22a, and the intermediate throttle hole The first orifice 21 and the second orifice 22a are communicated, and the first orifice 21, the middle orifice and the second orifice 22a are arranged in a stepped hole shape to meet the throttling requirement.

The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity, all possible combinations of the technical features in the above-described embodiments are not described. However, as long as there is no contradiction between the combinations of these technical features, All should be regarded as the scope described in this specification.

The above-mentioned embodiments only represent several embodiments of the present application, and the descriptions thereof are relatively specific and detailed, but should not be construed as a limitation on the scope of the patent application. It should be pointed out that for those skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which all belong to the protection scope of the present application. Therefore, the scope of protection of the patent of the present application shall be subject to the appended claims.

In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Back, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Clockwise, Counterclockwise, Axial , "radial", "circumferential" and other indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the application and simplifying the description, rather than indicating or implying the indicated device or Elements must have a particular orientation, be constructed and operate in a particular orientation and are therefore not to be construed as limitations on this application.

In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature delimited with "first", "second" may expressly or implicitly include at least one of that feature. In the description of the present application, "plurality" means at least two, such as two, three, etc., unless expressly and specifically defined otherwise.

In this application, unless otherwise expressly specified and limited, the terms "installed", "connected", "connected", "fixed" and other terms should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection , or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between the two elements, unless otherwise specified limit. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In this application, unless otherwise expressly stated and defined, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or the first and second features indirectly through an intermediary touch. Also, the first feature being "above", "over" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or an intervening element may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for the purpose of illustration only and do not represent the only embodiment.

Claims

A throttle device, characterized in that the device comprises:

The valve seat is provided with a first accommodating cavity, and a first interface and a second interface respectively communicating with the first accommodating cavity;

The throttle valve core is arranged in the first accommodating cavity, the first end of the throttle valve core is provided with a first throttle hole, and the second end of the throttle valve core is provided with the first throttle hole. The flow hole connected with the orifice;

The first filter assembly includes a first filter body and a first positioning protruding edge arranged on the outer periphery of the first filter body, the first positioning protruding edge is in contact with the first end of the throttle valve core, and the the first filter body covers the first throttle hole;

The second filter assembly includes a second filter body and a second positioning protruding edge disposed on the outer periphery of the second filter body, the second positioning protruding edge is in contact with the second end of the throttle valve core, and the the second filter body covers the flow hole;

The distance between the first positioning protrusion and the second positioning protrusion is greater than or equal to the length of the first throttle hole, or between the first positioning protrusion and the second positioning protrusion The distance is greater than or equal to the length of the flow hole.
The throttle valve device according to claim 1, wherein the throttle valve further comprises a nozzle, the nozzle is connected with the first interface, and the end of the nozzle is connected to the first positioning ledge Or the second positioning convex edge abuts.
The throttle valve device according to claim 2, wherein the inner wall of the valve seat is provided with a first positioning step matched with the second positioning protrusion, and the end of the connecting pipe is in contact with the first positioning protrusion. along abutment.
The throttle valve device according to claim 1, wherein the first positioning protrusion and the second positioning protrusion are positioning grids extending along the radial direction of the throttle valve.
The throttle valve device according to claim 1, wherein the first filter body is a cap-shaped filter screen with grooves, and the first positioning protrusion is fixed at the notch of the groove. and/or, the second filter body is a cap-shaped filter screen provided with grooves, and the second positioning protrusion is a positioning grid fixed at the notch of the groove.
The throttle valve device according to claim 5, wherein the first positioning protrusion is in direct contact with the first end of the throttle valve core; or, the throttle valve core is close to the throttle valve The outer wall of the first end of the valve core is provided with a second positioning step, and the first positioning protrusion is in contact with the second positioning step.
The throttle valve device according to claim 1, wherein the throttle valve core further comprises an intermediate throttle hole provided between the first throttle hole and the flow-through hole, and the intermediate throttle The orifice communicates with the first orifice and the flow-through hole.
The throttle valve device according to claim 1, wherein the throttle valve core comprises a fixed valve core provided with a second accommodating cavity, and a movable valve core set in the second accommodating cavity; The orifice is set at the first end of the fixed valve core, the flow-through hole is set at the second end of the fixed valve core, and the first orifice and the flow-through hole are both connected with the The second accommodating cavity is communicated; the movable valve core is provided with a third throttle hole, and the third throttle hole is communicated with the first throttle hole and the second accommodating cavity.
The throttle valve device of claim 8, wherein the outer wall of the second accommodating cavity matches the inner diameter of the first accommodating cavity.
The throttle valve device according to any one of claims 1-9, wherein the distance between the first filter assembly and the second filter assembly is greater than or equal to 5 mm.