Valve unit and valve device

Abstract

The present invention provides a valve unit and a valve device capable of suppressing deformation of a valve seat member formed by press working. A valve device (1) is provided with a valve seat member (10) disposed in an attachment hole (5) of a flow path unit. The valve seat member (10) is formed by press working and has a peripheral wall portion (11) and a bottom wall portion (12). The bottom wall portion (12) has a valve port (15). A valve seat (16) surrounding the valve port (15) is provided on the upper surface (12a) of the bottom wall section (12). The lower surface (12b) of the bottom wall part (12) is provided with a support surface (17) which is orthogonal with respect to the direction of the axis (L). The support surface (17) is in contact with the bottom surface (5b) of the mounting hole (5).

Description

Technical Field

[0001] The present invention relates to a valve unit and a valve device having the valve unit. Background Art

[0002] Patent Document 1 describes an example of a conventional valve device. The valve device includes a lower body serving as a flow path unit and an upper body serving as part of the valve unit. The upper body is mounted on the lower body. A valve seat component is fixed to the upper body. The valve seat component includes a cylindrical peripheral wall portion and a bottom wall portion connected to the lower end of the peripheral wall portion. A valve core is disposed inside the valve seat component. A valve port and a valve seat are provided on the bottom wall portion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2003-227576

[0006] Technical problem to be solved by the invention

[0007] The valve seat component of Patent Document 1 is formed by cutting a metal workpiece. Forming the valve seat component by stamping sheet metal can reduce the manufacturing cost of the valve unit. However, when the valve port is closed, the valve core contacts the valve seat, exerting downward thrust on the bottom wall. The sheet metal valve seat component has relatively low rigidity and may deform. Summary of the Invention

[0008] Therefore, an object of the present invention is to provide a valve unit and a valve device capable of suppressing deformation of a valve seat member formed by press working.

[0009] Technical means for solving technical problems

[0010] In order to achieve the above-mentioned purpose, a valve unit of one embodiment of the present invention is installed on a flow path unit, which has a mounting hole and a flow path connected to the mounting hole, wherein the valve unit has a valve seat component and a valve core, the valve seat component has a peripheral wall portion and a bottom wall portion connected to one end of the peripheral wall portion, the valve core is arranged on the inner side of the valve seat component and moves axially along the peripheral wall portion, the valve seat component is formed by stamping and is arranged in the mounting hole, the bottom wall portion has a valve port, and a supporting surface is provided on the outer surface of the bottom wall portion which is perpendicular or inclined to the axial direction, the supporting surface is in contact with the bottom surface of the mounting hole, or a component is maintained between the supporting surface and the bottom surface of the mounting hole.

[0011] In the present invention, preferably, the supporting surface is an annular surface surrounding the valve port.

[0012] In the present invention, it is preferable that an annular sealing member is held between the support surface and the bottom surface of the mounting hole.

[0013] In the present invention, preferably, the support surface includes a plurality of surfaces arranged around the valve port.

[0014] In the present invention, it is preferable that a valve seat surrounding the valve port is provided on the inner surface of the bottom wall portion.

[0015] In the present invention, preferably, the valve unit further includes a cylindrical component arranged inside the valve seat component, a valve seat is provided at one end of the cylindrical component, the valve seat is opposite to the valve core along the axial direction, and the inner space of the cylindrical component is connected to the valve port.

[0016] In order to achieve the above-mentioned object, a valve device according to another aspect of the present invention includes the valve unit and the flow path unit.

[0017] In the present invention, preferably, an internal thread is provided on an inner peripheral surface of the mounting hole, and an external thread that is threadably engaged with the internal thread is provided on an outer peripheral surface of the peripheral wall portion.

[0018] In the present invention, preferably, an annular groove extending in the circumferential direction is provided on the inner peripheral surface of the mounting hole, and an annular sealing member is disposed in the annular groove, the sealing member sealing the gap between the flow path unit and the peripheral wall portion.

[0019] Effects of the Invention

[0020] According to the present invention, a valve seat component having a peripheral wall portion and a bottom wall portion is formed by stamping, and the valve seat component is arranged in the mounting hole of the flow path unit. A supporting surface provided on the outer surface of the bottom wall portion is perpendicular or inclined relative to the axial direction of the peripheral wall portion. Furthermore, the supporting surface contacts the bottom surface of the mounting hole, or a component is retained between the supporting surface and the bottom surface of the mounting hole. In this way, the bottom wall portion having the supporting surface is directly or indirectly supported by the bottom surface of the mounting hole. Therefore, deformation of the valve seat component formed by stamping can be effectively suppressed. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a cross-sectional view of a valve device according to a first embodiment of the present invention.

[0022] Figure 2 It is a cross-sectional view of a valve body assembly of a flow path unit and a valve unit included in the valve device.

[0023] Figure 3 Yes Figure 1 A cross-sectional view of a bottom wall portion of a valve seat member and its vicinity included in a valve device.

[0024] Figure 4 Yes Figure 1 A sectional view of the structure of a first modified example of the valve device.

[0025] Figure 5 Yes Figure 1 A sectional view of the structure of a second modified example of the valve device.

[0026] Figure 6 Yes Figure 1 A sectional view of the structure of a third modified example of the valve device.

[0027] Figure 7 is a sectional view of a valve device according to a second embodiment of the present invention.

[0028] Figure 8 Yes Figure 7 A cross-sectional view of a bottom wall portion of a valve seat member and its vicinity included in a valve device.

[0029] Explanation of symbols

[0030] 1, 1A, 1B, 1C...valve device,

[0031] 3... flow path unit, 4... main body block, 4a... upper surface, 4e... annular protrusion,

[0032] 5…Mounting hole, 5a…Inner circumference, 5b…Bottom, 5g…Annular groove, 5t…Internal thread, 6, 7…Flow path,

[0033] 8...valve unit, 9...valve body assembly,

[0034] 10, 10A, 10B, 10C…valve seat components,

[0035] 11... peripheral wall, 11d... horizontal hole, 11r... receiving surface, 11t... external thread,

[0036] 12, 12A, 12B, 12C... bottom wall, 12a... upper surface, 12b... lower surface,

[0037] 13...connection part, 14...valve chamber, 15...valve port, 16...valve seat,

[0038] 17, 17C...support surface, 17A, 17B...first support surface, 18A, 18B...second support surface,

[0039] 20... Housing, 30... Valve core, 31... Shaft, 33... Valve, 34... Spring bearing surface,

[0040] 40... driving mechanism, 41... rotor,

[0041] 42...valve shaft holder, 42a...upper wall, 42t...internal thread,

[0042] 43...guide bushing, 43a...base, 43b...support, 43t...external thread,

[0043] 45...Connecting parts, 46...Anti-dropout parts, 47...Valve closing spring,

[0044] 60... stator unit, 61... stator, 62... housing,

[0045] 66…motor,

[0046] 70...Cylinder component, 75...Inner space, 76...Valve seat,

[0047] S1, S2, S3, SA, SB, SC…sealing parts, L…axis line. DETAILED DESCRIPTION

[0048] Below, refer to Figures 1 to 3 A valve device according to a first embodiment of the present invention will be described.

[0049] exist Figure 1 1 shows a valve device according to a first embodiment of the present invention. The valve device 1 according to this embodiment is incorporated into a refrigeration cycle system of an air conditioner mounted on a vehicle, for example, and is used as a flow control valve for controlling the flow rate of a refrigerant.

[0050] The valve device 1 includes a flow path unit 3 and a valve unit 8 .

[0051] The flow channel unit 3 includes a main body block 4. The main body block 4 is made of, for example, aluminum alloy and has a rectangular parallelepiped shape.

[0052] The main body block 4 has a mounting hole 5 and flow paths 6 and 7 .

[0053] The main body block 4 has a circular annular protrusion 4e. The annular protrusion 4e is located on the upper surface 4a of the main body block 4. A mounting hole 5 is provided inside the annular protrusion 4e. An annular groove 5g extending circumferentially is provided at the lower portion of the inner circumferential surface 5a of the mounting hole 5. An annular sealing member S1 is disposed in the annular groove 5g. Furthermore, an internal thread 5t is provided at the upper portion of the inner circumferential surface 5a.

[0054] The flow paths 6 and 7 are connected to the mounting hole 5. One end of the flow path 6 opens to the inner peripheral surface 5a of the mounting hole 5. One end of the flow path 7 opens to the bottom surface 5b of the mounting hole 5.

[0055] The valve unit 8 has a valve body assembly 9 and a stator unit 60. Figure 2 The flow path unit 3 and the valve body assembly 9 are shown in the middle.

[0056] The valve body assembly 9 includes a valve seat member 10 , a housing 20 , a valve element 30 , and a drive mechanism 40 .

[0057] The valve seat member 10 integrally includes a peripheral wall portion 11 , a bottom wall portion 12 , and a connecting portion 13 .

[0058] The peripheral wall portion 11 has a cylindrical shape. The peripheral wall portion 11 is formed with a uniform thickness from the top to the bottom. The peripheral wall portion 11 has a plurality of transverse holes 11d. A receiving surface 11r is provided on the inner circumferential surface of the peripheral wall portion 11. The receiving surface 11r is a circular, annular flat surface facing upward. An external thread 11t is provided on the upper portion of the outer circumferential surface of the peripheral wall portion 11. The external thread 11t screws into the internal thread 5t of the mounting hole 5 of the main body block 4.

[0059] The bottom wall portion 12 has a circular plate shape. The outer peripheral edge of the bottom wall portion 12 is connected to the lower end of the peripheral wall portion 11. The bottom wall portion 12 blocks the lower end of the peripheral wall portion 11. The peripheral wall portion 11 and the bottom wall portion 12 define a valve chamber 14. The bottom wall portion 12 has a valve port 15. A circular ring-shaped valve seat 16 is provided on the upper surface 12a of the bottom wall portion 12. The valve seat 16 surrounds the valve port 15. A supporting surface 17 is provided on the lower surface 12b of the bottom wall portion 12. The supporting surface 17 is a circular annular plane facing downward and surrounds the valve port 15. The supporting surface 17 is orthogonal to the axis L direction (up and down direction). The upper surface 12a is the inner surface of the bottom wall portion 12, and the lower surface 12b is the outer surface of the bottom wall portion 12.

[0060] The connecting portion 13 has a circular plate shape and its inner peripheral edge is connected to the upper end of the peripheral wall portion 11 .

[0061] During the manufacturing process of the valve seat member 10, the peripheral wall portion 11, bottom wall portion 12, and connecting portion 13 are integrally formed by stamping sheet metal. Furthermore, the receiving surface 11r, valve port 15, valve seat 16, and support surface 17 are formed. Furthermore, a horizontal hole 11d and external threads 11t are formed in the peripheral wall portion 11, completing the valve seat member 10.

[0062] The housing 20 is made of metal such as stainless steel. The housing 20 has a cylindrical shape. The lower end of the housing 20 is open and the upper end is closed. The lower end of the housing 20 is joined to the outer periphery of the connecting portion 13.

[0063] The valve core 30 has a shaft portion 31 and a valve portion 33. The shaft portion 31 has a cylindrical shape. A spring bearing surface 34 is provided on the outer peripheral surface of the shaft portion 31. The spring bearing surface 34 is a circular annular plane facing upward. The valve portion 33 has a conical shape. The valve portion 33 is connected to the lower end of the shaft portion 31. The lower portion of the shaft portion 31 is arranged in a valve chamber 14 provided on the inner side of the valve seat component 10. The valve portion 33 and the valve seat 16 are opposite to each other in the direction of the axis L. The valve portion 33 is arranged at the valve port 15 through the valve seat 16. A variable throttling portion is formed between the valve portion 33 and the valve seat 16. When the valve portion 33 contacts the valve seat 16, the valve port 15 is closed. When the valve portion 33 leaves the valve seat 16, the valve port 15 is opened. Figures 1 to 3 , the valve core 30 is shown in a front view.

[0064] The drive mechanism 40 moves the valve element 30 in the vertical direction. The movement of the valve element 30 changes the opening of the valve port 15. The drive mechanism 40 includes a rotor 41, a valve shaft holder 42, a guide bushing 43, a connecting member 45, a disengagement prevention member 46, and a valve closing spring 47.

[0065] The rotor 41 has a cylindrical shape. The rotor 41 is arranged inside the housing 20. The rotor 41 has a plurality of magnetic poles. The plurality of magnetic poles are arranged on the outer peripheral surface of the rotor 41. The rotor 41 is a magnetic rotor.

[0066] The valve shaft holder 42 has a cylindrical shape. The lower end of the valve shaft holder 42 is open. The valve shaft holder 42 has an upper wall portion 42a. The valve shaft holder 42 is fixed to the rotor 41 via a connecting component 45. The valve shaft holder 42 rotates together with the rotor 41. The upper portion of the shaft portion 31 of the valve core 30 is inserted into a hole provided in the upper wall portion 42a. An anti-slip component 46 is fixed to the upper portion of the shaft portion 31. The valve closing spring 47 is arranged between the upper wall portion 42a and the spring bearing surface 34 of the valve core 30. The valve closing spring 47 is a coil spring that pushes the valve core 30 toward the valve seat 16. An internal thread 42t is provided on the inner circumferential surface of the valve shaft holder 42.

[0067] The guide bushing 43 has a base 43a and a support portion 43b. The base 43a and the support portion 43b have a cylindrical shape. The base 43a is pressed into the peripheral wall portion 11 of the valve seat component 10, and the lower end surface of the base 43a abuts against the bearing surface 11r of the peripheral wall portion 11. The support portion 43b is connected to the upper end of the base 43a. An external thread 43t is provided on the outer peripheral surface of the support portion 43b. The external thread 43t is screwed into the internal thread 42t of the valve shaft retainer 42. The shaft portion 31 of the valve core 30 is arranged on the inner side of the guide bushing 43. The guide bushing 43 supports the valve core 30 so that it can move in the up and down directions.

[0068] The stator unit 60 is mounted on the valve body assembly 9. The stator unit 60 includes a stator 61 and a housing 62. The stator 61 has a cylindrical shape. A housing 20 is arranged inside the stator 61. The stator 61 includes a plurality of coils and a plurality of pole teeth. The plurality of pole teeth are opposed to the outer peripheral surface of the rotor 41 via the housing 20. By supplying a driving current to the plurality of coils, the plurality of pole teeth are magnetized, and the rotor 41 rotates. The rotor 41 and the stator 61 constitute a motor 66. When the rotor 41 rotates, the rotor 41 and the valve shaft holder 42 move in the vertical direction due to the threaded feed action of the internal thread 42t of the valve shaft holder 42 and the external thread 43t of the guide bushing 43. As the valve shaft holder 42 moves, the valve core 30 moves in the vertical direction.

[0069] In the valve unit 8, the center axes of the valve seat member 10 (circumferential wall portion 11, bottom wall portion 12, valve port 15, valve seat 16, support surface 17), housing 20, valve core 30 (shaft portion 31, valve portion 33), rotor 41, valve shaft retainer 42, guide bushing 43 (base portion 43a, support portion 43b), and stator 61 are aligned with the axis L. The direction of the axis L is the axial direction of the peripheral wall portion 11.

[0070] Next, refer to Figure 2 、 Figure 3 A method of assembling the valve device 1 will be described.

[0071] The sealing member S1 is placed in the annular groove 5g of the main body block 4 of the flow path unit 3. The annular sealing member S2 is placed on the upper end surface of the annular protrusion 4e of the main body block 4, and the annular sealing member S3 is placed around the annular protrusion 4e. The sealing members S1 to S3 are made of rubber or synthetic resin.

[0072] The valve seat member 10 of the valve unit 8 is inserted into the mounting hole 5 of the main body block 4, and the external thread 11t of the valve seat member 10 is screwed into the internal thread 5t of the main body block 4. The valve seat member 10 is fixed to the main body block 4 through the sealing member S1. When the support surface 17 of the valve seat member 10 contacts the bottom surface 5b of the mounting hole 5, the valve unit 8 is fixed to the main body block 4 and the valve seat member 10 is arranged in the mounting hole 5.

[0073] When the valve seat member 10 is positioned in the mounting hole 5, the valve chamber 14 is connected to the flow path 6 via the transverse hole 11d of the valve seat member 10 and the mounting hole 5, and the valve port 15 is connected to the flow path 7. The sealing member S1 is compressed in the radial direction, sealing the gap between the main body block 4 and the peripheral wall portion 11 of the valve seat member 10. The sealing member S2 is compressed in the direction of the axis L, sealing the gap between the main body block 4 and the connecting portion 13 of the valve seat member 10.

[0074] Then, the housing 20 is inserted into the stator 61, and the stator unit 60 is mounted on the valve body assembly 9. The outer shell 62 surrounds the sealing member S3, which is radially compressed to seal the gap between the body block 4 and the outer shell 62. In this way, the valve device 1 is completed.

[0075] As described above, the valve device 1 includes a flow path unit 3 and a valve unit 8. The flow path unit 3 includes a mounting hole 5 and flow paths 6 and 7 connected to the mounting hole 5. The valve unit 8 includes a valve seat component 10 and a valve core 30. The valve seat component 10 includes a peripheral wall portion 11 and a bottom wall portion 12 connected to the lower end of the peripheral wall portion 11. The valve core 30 is arranged on the inner side of the valve seat component 10 and moves along the axis L. The valve seat component 10 is formed by stamping and is arranged in the mounting hole 5. The bottom wall portion 12 includes a valve port 15. A support surface 17 is provided on the lower surface 12b of the bottom wall portion 12, which is orthogonal to the axis L. The support surface 17 contacts the bottom surface 5b of the mounting hole 5. In this way, the bottom wall portion 12 having the support surface 17 is supported by the bottom surface 5b of the mounting hole 5. Therefore, deformation of the valve seat component 10 formed by stamping can be effectively suppressed.

[0076] The support surface 17 is an annular surface surrounding the valve port 15. This allows the portion of the bottom wall 12 surrounding the valve port 15 to be uniformly supported.

[0077] Furthermore, the valve seat 16 is provided on the upper surface 12a of the bottom wall portion 12. Thus, the valve seat 16 can be formed together with the bottom wall portion 12 by press working, and the manufacturing cost can be reduced.

[0078] Furthermore, an internal thread 5t is provided on the inner circumferential surface 5a of the mounting hole 5. An external thread 11t is provided on the outer circumferential surface of the peripheral wall portion 11, which screws into the internal thread 5t. This allows the valve unit 8 to be mounted on the flow path unit 3 using a relatively simple thread structure. Alternatively, the valve unit 8 can be mounted on the flow path unit 3 using other mounting structures.

[0079] Furthermore, an annular groove 5g extending in the circumferential direction is provided on the inner circumferential surface 5a of the mounting hole 5. A sealing member S1 is disposed in the annular groove 5g, sealing the gap between the main body block 4 of the flow path unit 3 and the peripheral wall portion 11. This eliminates the need for a groove for arranging the sealing member S1 in the peripheral wall portion 11. Consequently, a reduction in the rigidity of the valve seat member 10 can be suppressed.

[0080] Next, refer to Figures 4 to 6 , the structure of the modified example of the valve device 1 of this embodiment is described. In the following description, the same reference numerals are given to the same structures as the valve device 1 and the description thereof is omitted. In addition, in the valve device of each modified example, an annular groove 5g is provided on the inner peripheral surface 5a of the mounting hole 5.

[0081] exist Figure 4 ] A portion of a valve device 1A according to a first modified example of the valve device 1 is shown in FIG.

[0082] The valve device 1A includes a valve seat member 10A. The valve seat member 10A has the same structure as the valve seat member 10 of the valve device 1, except that the valve seat member 10A includes a bottom wall portion 12A instead of the bottom wall portion 12.

[0083] A first support surface 17A and a second support surface 18A are provided on the lower surface 12b of the bottom wall portion 12A. The first support surface 17A is a circular, annular plane facing downward and surrounds the valve port 15. The second support surface 18A is a circular, annular plane facing downward and surrounds the first support surface 17A. The second support surface 18A is positioned above the first support surface 17A. The first and second support surfaces 17A and 18A are orthogonal to the axis L.

[0084] First support surface 17A contacts bottom surface 5b of mounting hole 5. An annular sealing member SA is held between second support surface 18A and bottom surface 5b. Sealing member SA is made of rubber or synthetic resin. Alternatively, an annular member made of metal or hard plastic may be held between second support surface 18A and bottom surface 5b in place of sealing member SA.

[0085] exist Figure 5 ] A portion of a valve device 1B according to a second modified example of the valve device 1 is shown in FIG.

[0086] The valve device 1B includes a valve seat member 10B. The valve seat member 10B has the same structure as the valve seat member 10 of the valve device 1, except that the valve seat member 10B includes a bottom wall portion 12B instead of the bottom wall portion 12.

[0087] A first support surface 17B and a second support surface 18B are provided on the lower surface 12b of the bottom wall portion 12B. The first support surface 17B is a downwardly facing, circular, annular flat surface that surrounds the valve port 15. The second support surface 18B is a downwardly facing, circular, annular, conical surface. The inner periphery of the second support surface 18B is connected to the outer periphery of the first support surface 17B. The first support surface 17B is perpendicular to the axis L. The second support surface 18B is inclined relative to the axis L.

[0088] First support surface 17B contacts bottom surface 5b of mounting hole 5. An annular sealing member SB is held between second support surface 18B and bottom surface 5b. Sealing member SB is made of rubber or synthetic resin. Bottom wall portion 12B may have only one of first support surface 17B and second support surface 18B.

[0089] exist Figure 6 ] A portion of a valve device 1C according to a third modified example of the valve device 1 is shown in FIG.

[0090] The valve device 1C includes a valve seat member 10C. The valve seat member 10C has the same structure as the valve seat member 10 of the valve device 1, except that the valve seat member 10C includes a bottom wall portion 12C instead of the bottom wall portion 12.

[0091] A support surface 17C is provided on the lower surface 12b of the bottom wall portion 12C. The support surface 17C is a circular annular plane facing downward and surrounds the valve port 15. The support surface 17C is perpendicular to the axis L direction.

[0092] An annular sealing member SC is held between the support surface 17C and the bottom surface 5b. The sealing member SC is made of rubber or synthetic resin. Alternatively, an annular member made of metal or hard plastic may be held between the support surface 17C and the bottom surface 5b instead of the sealing member SC.

[0093] The valve devices 1A to 1C also exhibit the same effects as the valve device 1 .

[0094] Below, refer to Figure 7 、 Figure 8 In the following description, the same reference numerals are given to the same components as those of the valve device 1 and their description is omitted.

[0095] The valve device 2 according to the second embodiment of the present invention has the same structure as the valve device 1 except that it further includes a cylinder member 70 .

[0096] The valve unit 8 of the valve device 2 has a cylindrical component 70. The cylindrical component 70 has a cylindrical shape. The cylindrical component 70 is pressed into the valve seat component 10 and is coaxially arranged on the inner side of the valve seat component 10. A ring-shaped valve seat 76 is provided at the upper end (one end) of the cylindrical component 70. The lower end (the other end) of the cylindrical component 70 contacts the upper surface 12a of the bottom wall portion 12 of the valve seat component 10, and the inner space 75 of the cylindrical component 70 is connected to the valve port 15. The valve port 15 and the inner space 75 form a valve port. The valve portion 33 of the valve core 30 and the valve seat 76 are opposite to each other along the axis L. The valve portion 33 is arranged in the inner space 75 through the valve seat 76. A variable throttling portion is formed between the valve portion 33 and the valve seat 76. When the valve portion 33 contacts the valve seat 76, the inner space 75 is isolated from the valve chamber 14 and the valve port is closed. When the valve portion 33 leaves the valve seat 76, the inner space 75 is connected to the valve chamber 14, and the valve port is opened. Figure 7 、 Figure 8 , the valve core 30 is shown in a front view.

[0097] The valve device 2 also has the same effect as the valve device 1. In addition, the cylinder member 70 having the valve seat 76 is a separate component from the valve seat member 10, so the cylinder member 70 can be manufactured by a processing method with higher precision than stamping, which can effectively suppress valve leakage.

[0098] In valve devices 1 and 2, a support surface 17, which is an annular surface, is provided on the bottom wall portion 12 of the valve seat member 10. Instead of support surface 17, the bottom wall portion 12 may be provided with a plurality of support surfaces arranged around the valve port 15. For example, the plurality of surfaces may be arranged at equal intervals along the circumference of the valve port 15.

[0099] The valve devices 1 and 2 include a drive mechanism 40 that uses the rotation of the rotor 41 without reducing speed. The valve devices 1 and 2 may include a speed reduction mechanism that reduces speed of the rotation of the rotor 41 instead of the drive mechanism 40 .

[0100] In this specification, terms such as "cylindrical" and "cylindrical" that indicate a shape also apply to components or parts of components that substantially have the shape indicated by these terms. For example, "a cylindrical component" includes both cylindrical components and substantially cylindrical components. Furthermore, in this specification, the term "identical" may include both strictly identical and substantially identical components.

[0101] While the embodiments of the present invention have been described above, the present invention is not limited to the embodiments. Any addition, deletion, or design change of components to the above-described embodiments, or any combination of features of the embodiments as appropriate by a person skilled in the art, is within the scope of the present invention as long as it does not violate the spirit of the present invention.

Claims

1. A valve unit mounted on a flow path unit, the flow path unit having a mounting hole and a flow path connected to the mounting hole, characterized in that: The valve unit includes a valve seat component and a valve core. The valve seat component includes a peripheral wall portion and a bottom wall portion connected to one end of the peripheral wall portion. The valve core is arranged inside the valve seat component and moves along the axial direction of the peripheral wall portion. The valve seat member is formed by stamping and is arranged in the mounting hole. The bottom wall portion has a valve port, A supporting surface is provided on the outer surface of the bottom wall portion, which is perpendicular or inclined to the axial direction. The support surface is in contact with the bottom surface of the mounting hole, or a component is held between the support surface and the bottom surface of the mounting hole.

2. The valve unit according to claim 1, characterized in that The supporting surface is an annular surface surrounding the valve port.

3. The valve unit according to claim 2, characterized in that An annular sealing member is held between the support surface and the bottom surface of the mounting hole.

4. The valve unit according to claim 1, wherein The support surface includes a plurality of surfaces arranged around the valve port.

5. The valve unit according to claim 1, wherein A valve seat surrounding the valve port is provided on the inner surface of the bottom wall portion.

6. The valve unit according to claim 1, wherein The valve unit further includes a cylindrical member disposed inside the valve seat member. A valve seat is provided at one end of the cylinder component, and the valve seat is opposite to the valve core along the axial direction. The inner space of the cylindrical member is connected to the valve port.

7. A valve device, characterized in that: The invention comprises the valve unit according to any one of claims 1 to 6 and the flow path unit.

8. The valve device according to claim 7, characterized in that An internal thread is provided on the inner circumference of the mounting hole. An external thread that screws into the internal thread is provided on the outer peripheral surface of the peripheral wall portion.

9. The valve device according to claim 7, characterized in that An annular groove extending in the circumferential direction is provided on the inner circumferential surface of the mounting hole. An annular sealing member is disposed in the annular groove, and the sealing member seals a gap between the flow path unit and the peripheral wall portion.

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