Valve device

Abstract

A valve device comprises a valve body assembly and a valve element, the valve body assembly is provided with a containing cavity, and at least part of the valve element is located in the containing cavity; the valve device comprises a limiting component, the limiting component and the valve body assembly are of a split structure, and the limiting component and the valve body assembly are fixedly connected or connected in a limiting mode. The valve element is provided with a hole which extends in the axial direction of the valve device. The limiting component comprises a matching wall which is located in the hole, the extending direction of the matching wall is the same as that of the hole, and the matching wall is in sliding fit with the side wall forming the hole. The valve element comprises a first hole channel, and the limiting component is provided with a second hole channel communicating with the first hole channel. The valve element is limited in the radial direction through the matching wall, deflection of the valve element can be reduced, and therefore the risk that the valve element is stuck is reduced. In addition, the limiting component and the valve body assembly are of a split structure, and machining of the limiting component is facilitated.

Description

[0001] This application claims the priority of the Chinese patent application filed with the China Patent Office on December 5, 2023, with application number 202323302191.0 and invention name “A valve device”, the entire contents of which are incorporated by reference in this application. Technical Field

[0002] The utility model relates to the technical field of fluid control, in particular to a valve device. Background Art

[0003] The valve device can be used in a thermal management system to control the opening, closing or reversing of a fluid channel. The valve device includes a valve core ball and a valve body. The valve core ball is located in the valve cavity of the valve body and is driven by the valve stem to rotate the valve core ball. The valve core ball may deflect during operation. Utility Model Content

[0004] One object of the present application is to provide a valve device that can reduce the deflection of the valve core.

[0005] One embodiment of the present application provides a valve device, including a valve body assembly and a valve core, the valve body assembly having a accommodating cavity, at least part of the valve core being located in the accommodating cavity; the valve device comprising a limiting component, the limiting component and the valve body assembly being a separate structure, the limiting component being fixedly connected or limitatively connected to the valve body assembly; the valve core having a hole, the hole extending along the axial direction of the valve device; the limiting component comprising a matching wall, the matching wall being located in the hole, the matching wall and the hole extending in the same direction, the matching wall slidably matching with the side wall forming the hole; the valve core comprising a first channel, the limiting component having a second channel, the second channel being connected to the first channel.

[0006] In a valve device provided in one embodiment of the present application, the limiting component includes a matching wall, the matching wall is located in the hole, the matching wall and the hole extend in the same direction, the matching wall and the side wall forming the hole are slidably matched, and the valve core is radially limited by the matching wall, which can reduce the deflection of the valve core and thus reduce the risk of the valve core being stuck. In addition, the limiting component and the valve body assembly are separate structures, which facilitates the processing of the limiting component.

[0007] Another embodiment of the present application provides a valve device, including a valve body assembly and a valve core, the valve body assembly having an accommodating cavity, at least part of the valve core is located in the accommodating cavity; the valve device includes a limiting component, the limiting component and the valve body assembly are separate structures, the limiting component is fixedly connected or limitedly connected to the valve body assembly; the valve core has a hole, the hole extends along the axial direction of the valve device; the limiting component includes a matching wall, the matching wall is located in the hole, the matching wall and the hole have the same extension direction, along the direction perpendicular to the axial direction of the valve device, at least a part of the matching wall can contact the side wall forming the hole; the valve core includes a first channel, the limiting component has a second channel, and the second channel is connected to the first channel. In the valve device provided in another embodiment of the present application, the limiting component includes a matching wall, the matching wall is located in the hole, the matching wall and the hole have the same extension direction, along the direction perpendicular to the axial direction of the valve device, at least a part of the matching wall can contact the side wall forming the hole, and the valve core is radially limited by the matching wall, which can reduce the deflection of the valve core, thereby reducing the risk of the valve core being stuck. In addition, the limiting component and the valve body assembly are separate structures, which facilitates the processing of the limiting component. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 A schematic diagram of a three-dimensional structure of an embodiment of a valve device of the present application is shown;

[0009] Figure 2 Shows Figure 1 The valve device shown is a schematic structural diagram at an angle;

[0010] Figure 3 Shows Figure 2 The cross-sectional structure diagram of the valve device shown along line AA;

[0011] Figure 4 Shows Figure 3 an exploded schematic diagram of a portion of the valve assembly shown;

[0012] Figure 5 Shows Figure 4 An exploded cross-sectional view of a portion of the valve device shown;

[0013] Figure 6 Shows Figure 1 The structure schematic diagram of the valve device shown is another angle;

[0014] Figure 7 Shows Figure 6 The valve device is shown as a three-dimensional cross-sectional structural schematic diagram along line BB;

[0015] Figure 8 Shows Figure 2The cross-sectional structure diagram of the valve device along the CC line is shown, and the valve device is in the first working state at this time;

[0016] Fig. 9 Shows Figure 2 The cross-sectional structure diagram of the valve device along the CC line is shown, and the valve device is in the second working state at this time;

[0017] Fig.10 A schematic cross-sectional view of a portion of another embodiment of a valve device is shown;

[0018] Fig.11 Shows Figure 3 A schematic cross-sectional view of a portion of a valve body assembly of the valve device shown.

[0019] Reference numerals:

[0020] 100. Valve device; 1. Valve body assembly; 10. Accommodating cavity; 101. Interlayer cavity; 111. Assembly hole; 112. Limiting groove; 14. First channel; 15. Second channel; 16. Third channel; 17. Fourth channel; 2. Valve core; 21. Peripheral portion; 22. Orifice; 23. Expansion groove; 25. Second opening; 26. First opening; 28. End face portion; 221. Hole; 27. Second step face portion; 4. Limiting component; 41. Insertion portion; 411. Matching wall; 42. Base; 43. First step face portion; 44. Second orifice; 45. Through hole; 5. Valve seat assembly; 6. Drive assembly; 61. Valve stem; 7. Sensor; 8. Control assembly; 81. Stator; 82. Shell; 83. Electric control board; 9. Heat exchanger. DETAILED DESCRIPTION

[0021] The embodiments are described in detail below with reference to the accompanying drawings.

[0022] In order to make the purpose, technical solutions and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and specific embodiments. In this article, relational terms such as "first" and "second" are only used to distinguish one component with the same name from another, and do not necessarily require or imply that there is any such actual relationship or order between these components. It should be noted that the "limited connection" in this application includes snap-on connection, hinged connection, etc., and the "fixed connection" in this application includes threaded connection, welding, bonding, vulcanization fixation, riveting, insert injection molding, interference fit, etc.

[0023] Figures 1 to 9 A valve device 100 is shown, which includes a valve body assembly 1, a valve core 2, a drive assembly 6, and a control assembly 8. The control assembly 8 includes a stator 81. The valve body assembly 1 has an accommodating cavity 10. At least part of the valve core 2 is located in the accommodating cavity 10. The valve core 2 can rotate under the drive of the drive assembly 6.

[0024] The axial direction of the valve device 100 is defined as follows: Figure 3 The rotation axis of the valve core 2 is defined as H. Figure 3 As shown by C1 , the valve core 2 can rotate around the rotation axis, and the axial direction of the valve device is parallel to the extension direction of the rotation axis of the valve core 2 .

[0025] Figures 3 to 5 As shown, the valve core 2 includes a first channel 22, and the first channel 22 has a first opening 26 at the outer peripheral portion 21 of the valve core 2. Along the axial direction of the valve core 2, the first channel 22 has a second opening 25 at one end of the valve core 2 relatively close to the first channel 14. The valve body assembly 1 has a first channel 14, and along the axial direction of the valve device 100, the first channel 14 is located on one side of the valve core 2, and the limiting component 4 includes a second channel 44, one end of the second channel 44 is connected to the first channel 22, and the other end of the second channel 44 is connected to the first channel 14.

[0026] like Figures 3 to 5 As shown, the valve device 100 includes a limiting component 4, which is fixedly connected or limitedly connected to the valve body assembly 1; the valve core 2 has a hole 221, and the hole 221 extends along the axial direction of the valve device 100; the limiting component 4 includes a matching wall 411, which is located in the hole 221, and the matching wall 411 extends in the same direction as the hole 221, and the matching wall 411 is slidably matched with the side wall forming the hole 221; the valve core 2 is radially limited by the outer peripheral portion 21 of the limiting component 4, which can reduce the deflection of the valve core 2, thereby reducing the risk of the valve core 2 being stuck. Specifically, along the direction perpendicular to the axial direction of the valve device 100, when the valve core 2 has a tendency to deviate relative to the limiting component, at least a portion of the matching wall 411 can contact the side wall forming the hole 221, so that the valve core 2 can be radially limited.

[0027] In this embodiment, the hole 221 is a part of the first channel 22. Along the axial direction of the valve core 2, the limiting component 4 passes through the second opening 25. The limiting component 4 includes an insertion portion 41. Along the axial direction of the valve core 2, the insertion portion 41 extends from the second opening 25 to the other end of the valve core 2. The matching wall 411 is located at the radial periphery of the insertion portion 41 and surrounds the second channel 44. In this way, the inner wall of the first channel 22 is used as a radial limiting structure, the structure is simpler, and the occupation of the axial space is reduced, thereby reducing the axial size of the valve device 100. In other embodiments, the hole 221 can also be separated from the first channel 22, for example, the hole 221 surrounds the outer periphery of the second opening 25.

[0028] like Figures 3 to 5As shown, the matching wall 411 is cylindrical, and the side wall of the hole 221 is cylindrical. Along the axial direction of the valve core 2, the length of the matching wall 411 is greater than one-fourth of the overall length of the valve core 2, such as one-third, two-fifths, one-half, two-thirds, etc., which can enhance the radial limiting of the valve core 2 by the limiting component 4 and further reduce the deflection of the valve core 2. The length of the matching wall 411 is less than three-quarters of the overall length of the valve core 2, so that the limiting component 4 will not be too long, and axial space can be reserved for the assembly of the valve core 2.

[0029] The material of the matching wall 411 includes one or more of fluoroplastics, polyetheretherketone, polyoxymethylene, and self-lubricating metals, which can reduce the friction between the valve core 2 and the matching wall 411, thereby reducing the rotation torque of the valve core 2 and reducing the risk of the valve core 2 being stuck. Specifically, the material of the matching wall 411 is PTFE (polytetrafluoroethylene), and the material of the entire limiting component 4 is PTFE (polytetrafluoroethylene).

[0030] like Figures 3 to 5 As shown, the limiting component 4 includes a first step surface 43, which is located between the valve core 2 and the first channel 14 along the axial direction of the valve device 100, and faces the second opening 25. The first step surface 43 abuts against or is provided with a gap with one end of the valve core 2, and the first step surface 43 can limit the axial position of the valve core 2, especially when the valve core 2 is assembled with the first limiting part, the valve core 2 can be positioned in the axial direction. Specifically, the first step surface 43 is annular, and the first step surface 43 extends outward from the matching wall 411 along the radial direction of the valve device 100, and the first step surface 43 can also reduce the deflection of the valve core 2.

[0031] like Fig.10 As shown, in other embodiments, the wall forming the first channel 22 includes a second step surface portion 27. Along the axial direction of the valve device 100, the second step surface portion 27 faces the second opening 25. The first step surface portion 43 is located between the second opening 25 and the second step surface portion 27. The first step surface portion 43 and the second step surface portion 27 are abutted or gapped, so that the first step surface portion 43 limits the axial position of the valve core 2. However, arranging the second step surface portion 27 inside the valve core 2 can reduce the radial dimension of the limiting component 4.

[0032] like Figures 3 to 5 As shown, the limiting component 4 is cylindrical and has a through hole 45 radially penetrating through its side wall. One end of the through hole 45 is connected to the second channel 44 , and the other end of the through hole 45 is connected to the accommodating cavity 10 .

[0033] It should be noted that if Figure 7As shown, the accommodating chamber 10 includes an interlayer chamber 101, which is defined as being surrounded by the outer peripheral portion 21 of the valve core 2 and the wall forming the accommodating chamber 10. The second channel 44 can be connected to the interlayer chamber 101 through the through hole 45, so that when the fluid pressure in the second channel 44 is greater than that in the interlayer chamber 101, the fluid pressures of the second channel 44 and the interlayer chamber 101 can be balanced more quickly, thereby reducing the occurrence of "pressure holding". For example, since the first channel 14 is connected to the second channel 44, if the pressure in the first channel 14 is greater than that in the interlayer chamber 101, the valve core 2 will be pushed toward the driving assembly 6 by the fluid pressure, and the limiting component 4 will also expand radially along the valve device 100, thereby increasing the friction between the protruding portion 41 and the valve core 2.

[0034] like Figure 7 , Fig.11 As shown, the limiting component 4 and the valve body assembly 1 are separate structures, so the limiting component 4 and the valve core 2 can be placed in the accommodating cavity 10 one after another. Compared with the solution in which the limiting component 4 and the valve core 2 are integrated, the axial dimension of the accommodating cavity 10 can be relatively reduced, thereby reducing the volume of the valve device 100. Specifically, the valve body assembly 1 is made of metal, and the limiting component 4 and the valve body assembly 1 are separate structures, which facilitates the processing of the valve body assembly 1, especially the cutting processing of the accommodating cavity 10, and also facilitates the processing of the limiting component 4.

[0035] like Figure 7 , Fig.11 As shown, the valve body assembly 1 has a limiting groove 112, which is located between the first channel 14 and the through hole 45. Along the axial direction of the valve device 100, the limiting groove 112 is recessed in the wall forming the accommodating cavity 10, and the outer periphery of the limiting component 4 is transitionally matched or interference-matched with the side wall forming the limiting groove 112. In this way, when the limiting component 4 is installed on the valve body assembly 1, the position of the limiting component 4 is more accurate, reducing the risk of the valve core 2 being stuck. Specifically, the outer periphery of the limiting component 4 and the side wall forming the limiting groove 112 are "small interference" matched, which facilitates the limiting component 4 to be pressed into the limiting groove 112, and the limiting component 4 is made of plastic material, which can produce a certain deformation to adapt to the size of the limiting groove 112.

[0036] like Figures 3 to 5 As shown, the valve core 2 includes an end surface portion 28, which is located at one end of the valve core 2 relatively close to the first channel 14, and the second opening 25 is located at the end surface portion 28. The outer peripheral portion 21 of the valve core 2 is spherical, and the end surface portion 28 is located in the spherical surface where the outer peripheral portion 21 is located, which is convenient for processing the valve core 2, that is, reducing the processing difficulty of the valve core 2, and can also reduce the axial size of the valve core 2, thereby reducing the volume of the valve device 100. In the processing of the valve core 2, the valve core 2 can be first formed into a solid whole sphere, which is convenient for grinding the surface of the valve core 2, and then the valve core 2 is cut to form the end surface portion 28.

[0037] like Figures 3 to 5 As shown, the valve body has a second channel 15 and a third channel 16, and both the second channel 15 and the third channel 16 have openings in the wall forming the accommodating chamber 10. By controlling the valve core 2, the first opening 26 can be communicated with at least one of the second channel 15 and the third channel 16;

[0038] like Figure 4 , Figure 5 As shown, the valve core 2 has an expansion groove 23, which is recessed in the outer peripheral portion 21 of the valve core 2. The expansion groove 23 extends along the circumference of the valve core 2. One end of the expansion groove 23 is connected to the first channel 22. When the refrigerant passes through the expansion groove 23, a throttling expansion effect can be produced. By controlling the valve core 2, the valve device 100 can realize a flow regulation function, and can also realize a throttling expansion function.

[0039] like Figures 7 to 9 As shown, the valve body has a fourth channel 17, and the second channel 15 has an opening in the wall forming the fourth channel 17; the valve device 100 includes a sensor 7, a part of the sensor 7 is located in the fourth channel 17; the sensor 7 can sense the parameters of the fluid in the fourth channel 17. In this embodiment, the sensor 7 is a temperature and pressure sensor 7, and in other embodiments, the sensor 7 can be a temperature sensor 7 or a pressure sensor 7.

[0040] like Figure 3 , Figures 7 to 9 As shown, the valve device 100 includes a control component 8 and a rotor component, the control component 8 includes a shell 82, a stator 81 and an electric control board 83, the rotor component includes a rotor, and at least a portion of the stator 81 is sleeved on the outer periphery of the rotor component; the stator 81 is electrically connected and / or signal-connected to the electric control board 83, the sensor 7 is electrically connected and / or signal-connected to the electric control board 83, the electric control board 83 is located in the shell 82, and the electric control board 83 can be electrically connected and / or signal-connected to the vehicle bus.

[0041] like Figure 8 , Fig. 9 As shown, after the valve device 100 is connected to the thermal management system, the fourth channel 17 is connected to the outlet of the heat exchanger 9, and the third channel 16 is connected to the inlet of the heat exchanger 9. The heat exchanger 9 can be a plate heat exchanger or a microchannel heat exchanger.

[0042] The valve device 100 includes at least a first operating state and a second operating state. Figure 7 , Figure 8 , Fig. 9 The black one-way arrows in illustrative figures show the approximate flow path of the fluid in the valve device 100 .

[0043] like Figure 7 , Figure 8As shown, in the first working condition, the first opening 26 of the valve core 2 is connected to the second channel 15, and the valve core 2 cuts off the passage between the accommodating chamber 10 and the third channel 16, that is, the first channel 22 is not connected to the third channel 16. At this time, the first channel 14 is connected to the second channel 15 through the second channel 44 and the first channel 22, and the refrigerant does not flow through the heat exchanger 9.

[0044] like Figure 7 , Fig. 9 As shown, in the second working condition, the first opening 26 of the valve core 2 is connected to the third channel 16, the valve core 2 cuts off the passage between the accommodating chamber 10 and the second channel 15, and the first channel 22 is not connected to the second channel 15. At this time, the valve core 2 can adjust the refrigerant flow entering the heat exchanger 9, and the sensor 7 can measure the temperature and pressure of the refrigerant flowing out of the heat exchanger 9. After measuring the temperature and pressure, the sensor 7 can transmit the information to the on-board processor or directly to the processor included in the electric control board 83. The processor can adjust the rotation angle of the valve core 2 according to the information of the sensor 7, and then adjust the refrigerant flow entering the heat exchanger 9.

[0045] Therefore, at least two working conditions can be realized through the valve device 100, which has high integration, small size, and multiple functions. It can be used in refrigerant systems and coolant systems, and is particularly suitable for the automotive field with high volume requirements.

[0046] It should be noted that the above embodiments are only used to illustrate the present invention and are not intended to limit the technical solutions described in the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that those skilled in the art can still modify or make equivalent substitutions to the present invention, and all technical solutions and improvements thereof that do not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A valve device (100), comprising a valve body assembly (1) and a valve core (2), wherein the valve body assembly (1) has a receiving cavity (10), and at least a portion of the valve core (2) is located in the receiving cavity (10); The valve device (100) comprises a position limiting component (4), the position limiting component (4) and the valve body component (1) are separate structures, and the position limiting component (4) and the valve body component (1) are fixedly connected or position limitingly connected; The valve core (2) has a hole (221), and the hole (221) extends along the axial direction of the valve device (100); the limiting component (4) includes a matching wall (411), and the matching wall (411) is located in the hole (221), and the matching wall (411) and the hole (221) extend in the same direction, and the matching wall (411) is slidably matched with the side wall forming the hole (221); the valve core (2) includes a first channel (22), and the limiting component (4) has a second channel (44), and the second channel (44) is connected to the first channel (22).

2. The valve device (100) according to claim 1, characterized in that The first hole (22) has a first opening (26) at the outer peripheral portion (21) of the valve core (2); the valve body assembly (1) has a first channel (14), and along the axial direction of the valve device (100), the first channel (14) is located on one side of the valve core (2), and the second hole (44) is connected to the first channel (14); along the axial direction of the valve core (2), the first hole (22) has a second opening (25) at one end of the valve core (2) relatively close to the first channel (14), and the hole (221) is a part of the first hole (22).

3. The valve device (100) according to claim 2, characterized in that The limiting component (4) includes an extending portion (41), which extends from the second opening (25) to the other end of the valve core (2) along the axial direction of the valve core (2), and the matching wall (411) is located at the radial outer peripheral portion of the extending portion (41) and surrounds the second channel (44).

4. The valve device according to claim 3, characterized in that The side wall forming the hole (221) is cylindrical, the matching wall (411) is cylindrical, and the valve core (2) is rotatable relative to the limiting component (4).

5. The valve device (100) according to claim 4, characterized in that Along the axial direction of the valve core (2), the length of the matching wall (411) is greater than one quarter of the overall length of the valve core (2) and less than three quarters of the overall length of the valve core (2).

6. The valve device (100) according to claim 4, characterized in that The material of the matching wall (411) includes one or more of fluoroplastics, polyetheretherketone, polyoxymethylene, and self-lubricating metal.

7. The valve device (100) according to any one of claims 4 to 6, characterized in that: The limiting component (4) comprises a first step surface (43); Along the axial direction of the valve device (100), the first step surface (43) is located between the valve core (2) and the first passage (14), the first step surface (43) faces the second opening (25), and the first step surface (43) is in contact with or spaced from one end of the valve core (2); Alternatively, the wall forming the first channel (22) includes a second step surface (27), and along the axial direction of the valve device (100), the second step surface (27) faces the second opening (25), and the first step surface (43) is located between the second opening (25) and the second step surface (27), and the first step surface (43) and the second step surface (27) are abutted or gapped.

8. The valve device (100) according to claim 7, characterized in that The first step surface portion (43) is annular, and the first step surface portion (43) extends outward from the matching wall (411) along the radial direction of the valve device (100); The valve core (2) comprises an end surface portion (28), the end surface portion (28) is located at one end of the valve core (2) relatively close to the first channel (14), the second opening (25) is located at the end surface portion (28), the outer peripheral portion (21) of the valve core (2) is a part of a spherical surface, and the end surface portion (28) is located within the spherical surface where the outer peripheral portion (21) is located; The end surface portion (28) is in contact with or spaced from the first step surface portion (43).

9. The valve device (100) according to claim 7, characterized in that The limiting component (4) is cylindrical and has a through hole (45) that penetrates its side wall in the radial direction. One end of the through hole (45) is connected to the second hole (44), and the other end of the through hole (45) is connected to the accommodating cavity (10).

10. The valve device (100) according to claim 9, characterized in that The valve body assembly (1) is made of metal; The valve body assembly (1) has a limiting groove (112), and the limiting groove (112) is located between the first channel (14) and the through hole (45). Along the axial direction of the valve device (100), the limiting groove (112) is recessed into the wall forming the accommodating cavity (10), and the outer periphery of the limiting component (4) is transitionally fitted or interference fit with the side wall forming the limiting groove (112).

11. The valve device (100) according to any one of claims 1 to 10, characterized in that: The valve body has a second channel (15) and a third channel (16); the second channel (15) and the third channel (16) both have openings in a wall forming the accommodating chamber (10); the first hole (22) has a first opening (26) in an outer peripheral portion (21) of the valve core (2); by controlling the valve core (2), the first opening (26) can be communicated with at least one of the second channel (15) and the third channel (16); The valve core (2) has an expansion groove (23), the expansion groove (23) is recessed in the outer peripheral portion (21) of the valve core (2), the expansion groove (23) extends along the circumference of the valve core (2), and one end of the expansion groove (23) is connected to the first channel (22).

12. The valve device (100) according to claim 11, characterized in that The valve body has a fourth channel (17), and the second channel (15) has an opening in a wall forming the fourth channel (17); the valve device (100) includes a sensor (7), and a portion of the sensor (7) is located in the fourth channel (17); the valve device (100) includes a control component (8) and a rotor component, the control component (8) includes a housing (82), a stator (81) and an electric control board (83), the rotor component includes a rotor, and at least a portion of the stator (81) is sleeved on the outer periphery of the rotor component; the stator (81) is electrically connected and / or signal-connected to the electric control board (83), the sensor (7) is electrically connected and / or signal-connected to the electric control board (83), the electric control board (83) is located in the housing (82), and the electric control board (83) can be electrically connected and / or signal-connected to a vehicle bus.

13. A valve device (100), comprising a valve body assembly (1) and a valve core (2), wherein the valve body assembly (1) has a receiving cavity (10), and at least a portion of the valve core (2) is located in the receiving cavity (10); The valve device (100) comprises a position limiting component (4), the position limiting component (4) and the valve body component (1) are separate structures, and the position limiting component (4) and the valve body component (1) are fixedly connected or position limitingly connected; The valve core (2) has a hole (221), and the hole (221) extends along the axial direction of the valve device (100); the limiting component (4) includes a matching wall (411), and the matching wall (411) is located in the hole (221), and the matching wall (411) has the same extension direction as the hole (221), and at least a part of the matching wall (411) can contact the side wall forming the hole (221) along the direction perpendicular to the axial direction of the valve device; the valve core (2) includes a first channel (22), and the limiting component (4) has a second channel (44), and the second channel (44) is connected to the first channel (22).

14. The valve device (100) according to claim 13, characterized in that The first hole (22) has a first opening (26) at the outer peripheral portion (21) of the valve core (2); the valve body assembly (1) has a first channel (14), and along the axial direction of the valve device (100), the first channel (14) is located on one side of the valve core (2), and the second hole (44) is connected to the first channel (14); along the axial direction of the valve core (2), the first hole (22) has a second opening (25) at an end portion of the valve core (2) relatively close to the first channel (14), and the hole (221) is a part of the first hole (22); The limiting component (4) includes an extending portion (41), which extends from the second opening (25) to the other end of the valve core (2) along the axial direction of the valve core (2), and the matching wall (411) is located at the radial outer peripheral portion of the extending portion (41) and surrounds the second channel (44).

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