Valve device

Abstract

This utility model provides a valve device, including a rotor connector and a stop. The rotor connector includes a base plate portion and a protrusion portion, the protrusion portion protruding upward from a first end wall of the base plate portion. The stop includes a receiving portion, the first end wall and the second end wall are mutually limitingly engaged, the first outer peripheral wall of the protrusion portion and the first inner peripheral wall of the receiving portion are mutually limitingly engaged, at least one of the rotor connector and the stop has a clearance portion, the clearance portion is disposed at the transition connection between the first end wall and the first outer peripheral wall and / or the clearance portion is disposed at the transition connection between the second end wall and the first inner peripheral wall, the clearance portion causes the stop to avoid the rotor connector, thereby making the positioning error between the stop and the rotor connector relatively small.

Description

Technical Field

[0001] This application relates to fluid control technology, specifically to a stator assembly and valve device. Background Technology

[0002] A valve device in the related technology includes a rotor connector and a stop. The rotor connector and the stop are in a limiting fit. The rotor connector includes a boss and a base plate, with the boss protruding upwards from the base plate. In one valve device of the related technology, the connection between the boss and the base plate adopts a right-angle structure. However, the right-angle structure causes stress concentration in the rotor connector, which may lead to breakage when subjected to external forces, such as the stopping force on the stop. To address this, in another valve device of the related technology, the connection between the boss and the base plate adopts a rounded corner structure. While this reduces the stress concentration problem in the rotor connector, the rounded corner structure causes positional interference with the stop, resulting in a relatively large positioning error between the stop and the rotor connector. Utility Model Content

[0003] The purpose of this application is to provide a valve device in which the positional error between the stop and the rotor connection is relatively small.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A valve device includes a rotor connector and a stop member. The rotor connector includes a protrusion and a base plate. The protrusion protrudes upward from a first end wall of the base plate. The stop member includes a receiving portion that is recessed inward from a second end wall of the stop member. The first end wall and the second end wall are in a limiting engagement. The first outer peripheral wall of the protrusion is in a limiting engagement with the first inner peripheral wall of the receiving portion. At least one of the rotor connector and the stop member has a clearance portion. The clearance portion is disposed at the transition connection between the first end wall and the first outer peripheral wall and / or at the transition connection between the second end wall and the first inner peripheral wall. The clearance portion allows the stop member to avoid the rotor connector.

[0006] In the valve device provided in this application, at least one of the rotor connector and the stop has a clearance portion. The clearance portion is disposed at the transition connection between the first end wall and the first outer peripheral wall and / or at the transition connection between the second end wall and the first inner peripheral wall. The clearance portion allows the stop to avoid the rotor connector, thereby making the positioning error between the stop and the rotor connector relatively small. Attached Figure Description

[0007] Figure 1 A three-dimensional structural schematic diagram of the valve device provided in the first embodiment of this application;

[0008] Figure 2for Figure 1 A cross-sectional structural diagram of the central valve device;

[0009] Figure 3 for Figure 2 A magnified view of the structure at point "A" in the middle;

[0010] Figure 4 for Figure 2 A cross-sectional structural diagram of the rotor connector;

[0011] Figure 5 for Figure 2 A cross-sectional structural diagram of the stop mechanism;

[0012] Figure 6 for Figure 5 A three-dimensional structural diagram of the stop mechanism;

[0013] Figure 7 for Figure 1 A cross-sectional structural diagram of the stop element of the middle valve device when it is in the lower dead center position;

[0014] Figure 8 for Figure 1 A cross-sectional structural diagram of the stop element of the middle valve device when it is in the top dead center position;

[0015] Figure 9 for Figure 1 An exploded structural diagram of the central valve device;

[0016] Figure 10 for Figure 9 A schematic diagram of a portion of the central valve assembly;

[0017] Figure 11 A cross-sectional structural schematic diagram of the rotor connector and stop provided in the second embodiment of this application;

[0018] Figure 12 for Figure 11 A magnified view of the structure at point "B" in the middle;

[0019] Figure 13 A cross-sectional structural schematic diagram of the rotor connector and stop provided in the third embodiment of this application;

[0020] Figure 14 for Figure 13 A magnified view of the structure at point "C" in the middle;

[0021] Figure 15 A cross-sectional structural schematic diagram of the rotor connector and stop provided in the fourth embodiment of this application;

[0022] Figure 16 for Figure 15 A magnified schematic diagram of the structure at point "D" in the middle;

[0023] In the diagram: 10-valve device, 100-valve assembly, 200-stator assembly, 300-valve block, 400-weld, 110-rotor connector, 120-stop, 130-magnetic rotor, 140-lead screw, 150-valve core, 160-valve port, 170-mounting base, 180-slip ring, 190-spring guide rail, 111-protrusion, 112-second hole, 113-base plate. 114-First recess, 115-Second recess, 116-Transition section, 1111-First outer peripheral wall, 1131-First end wall, 1141-First arc-shaped segment, 1142-Second arc-shaped segment, 1143-Straight surface segment, 1151-Third arc-shaped segment, 1152-Fourth arc-shaped segment, 121-Connecting part, 122-Stop rod, 123-Conical surface, 1211-Receiving part, 1212- Second end wall, 1213-First inner peripheral wall, 1214-Third end wall, 1241-Inner end wall, 1242-Inner circular surface, 141-Upper end, 142-Middle section, 143-Lower end, 161-Throttle orifice, 171-Threaded hole, 181-Radial extension section, 191-Upper stop, 192-Lower stop, 210-Coil assembly, 220-Hall assembly, 230-Circuit board assembly, 240-Box body, 211-Coil encapsulation, 212-Coil, D1-Maximum aperture of the hole formed by the first clearance part, D2-Maximum aperture of the hole formed by the conical surface, r-Radius of the arc surface of the first clearance part, h-Height of the conical surface, a-Radius of the first clearance part, b-Angle between the generatrix of the conical surface and the plane where the second end wall is located, α-Radius of the second arc segment, β-Radius of the first arc segment. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, specific embodiments are described in further detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the technical solutions of this application and are not intended to limit this application.

[0025] The valve device 10 can be applied to automotive, residential, or commercial air conditioning cooling systems, as well as automotive battery cooling systems or battery cooling systems in other fields. In these types of cooling systems, the valve device 10 is generally used as a throttling element, a switching element, or a combination of throttling and switching functions. This application describes the valve device 10 as a throttling element.

[0026] The following is combined Figures 1 to 16The valve device 10 provided in this embodiment will be described in detail below. This valve device 10 includes a valve assembly 100, a stator assembly 200, and a valve block 300. The valve assembly 100 includes a rotor connector 110, a stop 120, a magnetic rotor 130, a lead screw 140, a valve core 150, a valve port 160, a mounting base 170, a slip ring 180, and a spring guide rail 190. The stator assembly 200 includes a coil assembly 210, a Hall effect sensor assembly 220, and a circuit board assembly 230.

[0027] like Figures 2 to 6 , Figures 11 to 16 In the first to fourth embodiments, the rotor connector 110 includes a protrusion 111 and a base plate 113, and the stop 120 includes a connecting portion 121. The protrusion 111 includes a first outer peripheral wall 1111, the base plate 113 includes a first end wall 1131, and the connecting portion 121 includes a receiving portion 1211 and a second end wall 1212. The receiving portion 1211 can be a hole, and it includes a first inner peripheral wall 1213. The protrusion 111 protrudes upward from the first end wall 1131 of the base plate 113, and the receiving portion 1211 is recessed inward from the second end wall 1212 of the connecting portion 121. The second end wall 1212 abuts against the corresponding portion of the first end wall 1131. The first inner peripheral wall 1211... The portion of the stop 120 abuts against the corresponding portion of the first outer peripheral wall 1111. At least one of the stop 120 and the rotor connector 110 has a clearance portion. The clearance portion is provided at the transition connection between the first end wall 1131 and the first outer peripheral wall 1111 and / or at the transition connection between the second end wall 1212 and the first inner peripheral wall. The clearance portion allows the stop 120 to avoid the rotor connector 110. This arrangement ensures that there is no positional interference between the transition connection between the base plate portion 113 and the protrusion and the clearance portion, thereby making the positioning error between the stop and the rotor connector relatively small. In addition, it is also beneficial to improve the fitting accuracy between the rotor connector 110 and the stop 120, and thus also beneficial to improve the stopping accuracy of the valve device.

[0028] In the first to fourth embodiments, the rotor connector 110 is an integral structure made of powder metallurgy.

[0029] like Figures 13 to 16 In the third and fourth embodiments shown, the avoidance portion includes a first avoidance portion, which is part of the rotor connector 110. The first avoidance portion is disposed at the transition connection between the first end wall 1131 and the first outer peripheral wall 1111. The first avoidance connection is smoothly transitioned. This configuration avoids the absence of abrupt shape changes between the first end wall 1131 and the first outer peripheral wall 1111, which helps to reduce stress concentration problems in the rotor connector 110.

[0030] like Figure 13 and Figure 14In the third embodiment shown, the first clearance portion includes a first recess 114, which is recessed inward from the first end wall 1131. The opening direction of the first recess 114 is perpendicular to the plane where the first end wall 1131 is located. With this arrangement, during the powder metallurgy process, the opening direction of the first recess 114 makes it relatively easy for the mold to be demolded from the rotor connector 110 along the axial direction of the valve device 10.

[0031] like Figure 13 and Figure 14 In the third embodiment shown, the first recess 114 includes a first arc-shaped segment 1141 and a second arc-shaped segment 1142. The second arc-shaped segment 1142 is recessed inward. The first arc-shaped segment 1141 is located on one side of the first end wall 1131 and transitions smoothly. The second arc-shaped segment 1142 is located on one side of the first outer peripheral wall 1111 and transitions smoothly. This arrangement makes the degree of recess of the second arc-shaped segment 1142 relatively large, thereby making the avoidance effect of the avoidance part better.

[0032] like Figure 14 In the third embodiment shown, there are at least two second arcuate segments 1142, and the first recess 114 includes a straight segment 1143, which is located between adjacent second arcuate segments 1142 and transitions smoothly.

[0033] like Figure 14 In the third embodiment shown, there are at least two straight segments 1143, one of which is located between the first arc segment 1141 and the second arc segment 1142 in a smooth transition.

[0034] like Figure 14 In the third embodiment shown, the first clearance portion is composed of a first recess 114, and the first clearance portion constitutes the clearance portion.

[0035] like Figure 15 and Figure 16 In the fourth embodiment shown, the rotor connector 110 is an integral structure made of powder metallurgy. The first clearance portion includes a second recess 115. The second recess 115 is recessed inward from the first outer peripheral wall 1111, and the opening direction of the second recess is parallel to the plane where the first end wall is located.

[0036] like Figure 16 In the fourth embodiment shown, the second recess 115 includes a third arc-shaped segment 1151 and a fourth arc-shaped segment 1152. The third arc-shaped segment 1151 is recessed inward and smoothly transitions between the first end wall 1131 and the fourth arc-shaped segment 1152. The fourth arc-shaped segment 1152 smoothly transitions between the third arc-shaped segment 1151 and the first outer peripheral wall 1111. This arrangement makes the first arc-shaped segment 1141 relatively more recessed, thereby improving the avoidance effect of the avoidance portion.

[0037] like Figure 16 In the fourth embodiment shown, the third arc segment 1151 is concave inward relative to the first outer peripheral wall 1111, and the arc of the first arc segment 1141 is β, 120°≤β≤180°.

[0038] like Figure 16 In the fourth embodiment shown, the first clearance portion is composed of the second recess 115, and the first clearance portion constitutes the clearance portion.

[0039] like Figure 3 , Figure 5 , Figure 6 as well as Figures 11 to 12 In the first and second embodiments shown, the avoidance part includes a second avoidance part, which is part of the stop member. The second avoidance part is disposed at the transition connection between the second end wall and the first inner peripheral wall. The transition connection between the first end wall and the first outer peripheral wall and the second avoidance part are separated by a gap. This arrangement is more conducive to improving the avoidance effect.

[0040] like Figure 4 and Figure 5 In the first embodiment shown, the second clearance portion includes a tapered surface 123, which is located between the first end wall 1131 and the first outer peripheral wall 1111. The transition connection between the base plate portion 113 and the protrusion 111 and the tapered surface 123 are separated. This arrangement makes the clearance gap relatively larger, which is beneficial to improving the clearance effect.

[0041] like Figure 4 and Figure 5 In the first embodiment shown, the tapered surface 123 is located between the second end wall 1212 and the first inner peripheral wall 1213 in a smooth transition.

[0042] like Figure 4 and Figure 5 In the first embodiment shown, the avoidance part is composed of a second avoidance part, which is composed of a conical surface 123.

[0043] like Figure 4 and Figure 5 In the first embodiment shown, the maximum aperture of the transition portion 116 is defined as D1, the maximum aperture of the conical surface 123 is defined as D2, D1 < D2, the radius of the arc surface of the first clearance portion is defined as r, and the height of the conical surface 123 is defined as h, r < h.

[0044] like Figure 4 and Figure 5 In the first embodiment shown, the angle between the generatrix of the tapered surface 123 and the plane containing the second end wall 1212 is defined as b, where b = 45°.

[0045] In some embodiments, D1 and D2 are substantially equal, and r and h are substantially equal.

[0046] like Figure 4 and Figure 5 In the first embodiment shown, the stop 120 is an integral structure formed by stamping. The tapered surface 123 is located between the second end wall 1212 and the first inner peripheral wall 1213 and smoothly transitions. During the stamping process of the stop 120, the tapered surface 123 can be directly formed on the stop 120. With this setting, there is no need to perform additional operations to process the tapered surface 123 on the stop 120, which helps to simplify the processing of the stop 120.

[0047] like Figure 11 and Figure 12 In the second embodiment shown, the second clearance portion includes an inner end wall 1241 and an inner circular surface 1242. The inner end wall 1241 is located between the first inner peripheral wall 1213 and the inner circular surface 1242. The inner circular surface 1242 is located between the inner end wall 1241 and the second end wall 1212. The diameter of the inner circular surface 1242 is larger than the diameter of the first inner peripheral wall 1213. This arrangement facilitates the machining of the second clearance portion on the stop member 120.

[0048] like Figure 3 , Figure 5 and Figure 6 In the first embodiment shown, the rotor connector 110 includes a transition portion 116, which is recessed into the rotor connector 110. The transition portion 116 is spaced apart from the second clearance portion, and the surface of the transition portion 116 is smoothly transitioned between the first end wall 1131 and the first outer peripheral wall.

[0049] like Figure 3 , Figure 5 and Figure 6 In the first embodiment shown, the opening direction of the transition portion 116 is inclined relative to the plane where the first end wall 1131 is located. With this configuration, during the powder metallurgy process of the rotor connector, the opening direction of the first clearance portion 114 makes it relatively easy for the mold to be demolded from the rotor connector 110.

[0050] like Figure 4 In the first embodiment shown, the arc of the transition portion 116 is defined as a, where a is approximately 90°.

[0051] like Figures 2 to 6In the first embodiment shown, the material used to make the rotor connector 110 includes metal, the material used to make the stop 120 includes metal, the rotor connector 110 and the stop 120 are laser welded together to form a weld 400, the stop 120 includes a third end wall 1214, the third end wall 1214 is located at the end of the stop 120 away from the second end wall 1212, and the weld 400 is formed on the first outer peripheral wall 1111 and the third end wall 1214.

[0052] like Figure 3 In the first embodiment shown, the upper end 141 of the lead screw 140 is fixedly connected to the rotor connector 110, and the lower end 143 of the lead screw 140 is in a limiting fit with the valve core 150. A throttling orifice 161 is formed between the valve core 150 and the valve port 160. The lead screw 140 can drive the valve core 150 to move axially, thereby adjusting the size of the throttling orifice 161. When the valve core 150 moves axially, the valve core 150 can sit on the valve port 160 or be raised relative to the valve port 160, thereby adjusting the size of the throttling orifice 161, that is, adjusting the fluid flow rate through the valve device 10.

[0053] like Figure 7 and Figure 8 In the first embodiment shown, the coil assembly 210 and the magnetic rotor 130 are basically coaxially arranged. The coil assembly 210 is arranged around the outer peripheral wall of the magnetic rotor 130. The projection of the magnetic rotor 130 along the radial direction of the valve device 10 overlaps with the coil assembly 210. The changing magnetic field generated by the coil assembly 210 can always drive the magnetic rotor 130 to rotate. The rotor connector 110 is fixedly connected to the magnetic rotor 130 and located in the inner cavity of the magnetic rotor 130. When the stop 120 is at the top dead center position, the projection of the rotor connector 110 along the radial direction of the valve device 10 overlaps with the coil assembly 210. When the stop 120 is at the bottom dead center position, the projection of the rotor connector 110 along the radial direction of the valve device 10 also overlaps with the coil assembly 210. With this arrangement, the rotor connector 110 can be limited to move within the inner cavity of the coil assembly 210, making the structure of the valve device 10 relatively compact.

[0054] like Figures 7 to 9 In the first embodiment shown, the coil assembly 210 includes a coil 212 and a coil encapsulation portion 211. The coil encapsulation portion 211 is injection molded with the coil 212 as an insert. The coil 212 includes a claw pole housing, a plastic frame, and a winding. The winding is wound around the plastic frame, and the winding and the plastic frame are substantially located inside the claw pole housing. When the stop member 120 is in the top dead center position, the projection of the connecting portion 121 along the radial direction of the valve device 10 overlaps with the coil encapsulation portion 211, and the projection of the connecting portion 121 along the radial direction of the valve device 10 also overlaps with the claw pole housing.

[0055] like Figure 7 and Figure 8In the first embodiment shown, the upper end 141 of the lead screw 140 is fixedly disposed with the rotor connector 110, and the lower end 143 of the lead screw 140 is in a limiting fit with the valve core 150. A throttling orifice 161 is formed between the valve core 150 and the valve port 160. The lead screw 140 can drive the valve core 150 to move axially, thereby adjusting the size of the throttling orifice 161. When the valve core 150 moves axially, the valve core 150 can sit on the valve port 160 or be raised relative to the valve port 160. Considering that the rotor connector 110 is limited to moving within the inner cavity of the coil assembly 210, this arrangement makes the height of the lead screw 140 and the valve core 150 relatively small, which is beneficial to reducing the volume and material usage of the lead screw 140 and the valve core 150, thereby reducing the product cost of the valve device 10. It should be noted that the height referred to in this embodiment refers to the axial dimension of the valve device 10.

[0056] like Figure 8 In the first embodiment shown, when the stop 120 is at the top dead center, the valve device 10 is 100% open, and the throttle orifice 161 is fully open, i.e., at its maximum flow area. Figure 7 In the first embodiment shown, when the stop 120 is at the lower dead center position, the opening degree of the valve device 10 is 0, and the throttle port 161 is completely closed, that is, its flow area is zero.

[0057] like Figure 2 In the first embodiment shown, the valve device 10 includes a mounting base 170, and the lead screw 140 includes an intermediate section 142 located between the upper end 141 and the lower end 143 of the lead screw 140. The intermediate section 142 is threadedly engaged with the mounting base 170, and the mounting base 170 has a through threaded hole 171. The external thread of the intermediate section 142 is threadedly engaged with the internal thread forming the threaded hole 171. Considering that the height of the lead screw 140 and the valve core 150 is relatively small, this arrangement can reduce the height of the mounting base 170 accordingly.

[0058] In some embodiments, the intermediate section 142 is located in the through hole of the mounting base 170, and the intermediate section 142 and the mounting base 170 can be rotatably engaged by a bearing. The outer peripheral wall of the intermediate section 142 is engaged with the inner peripheral wall of the bearing, and the inner peripheral wall of the through hole of the mounting base 170 is engaged with the outer peripheral wall of the bearing.

[0059] like Figure 7 and Figure 8In the first embodiment shown, the stop 120 can drive the slip ring 180 to slide on the spring guide rail 190. When the slip ring 180 slides to the upper stop portion 191 of the stop spring, the stop 120 is located at the upper stop point. When the slip ring 180 slides to the lower stop portion 192 of the stop spring, the stop 120 is located at the lower stop point. The spring guide rail 190 is sleeved on the mounting base 170 and is fixedly connected to the mounting base 170. Considering that the height of the mounting base 170 is relatively small, this setting can reduce the height of the spring guide rail 190 accordingly.

[0060] like Figure 10 In the first embodiment shown, the lower stop 192 is fixedly engaged with the mounting base 170, and part of the slip ring 180 is located in the helical groove of the spring guide rail 190. When the magnetic rotor 130 rotates, the stop rod 122 of the stop member 120 can abut against the radial extension section 181 of the slip ring 180. Through the above-mentioned abutment setting, the stop member 120 can push the slip ring 180 to slide along the helical direction of the helical groove.

[0061] like Figure 2 , Figure 7 and Figure 8 In the first embodiment shown, the Hall element 220 is located on one axial side of the coil assembly 210, and the sensing surface of the Hall element 220 faces the outer peripheral wall of the magnetic rotor 130. The Hall element 220 can always sense the magnetic field changes of the magnetic rotor 130 and generate Hall signals. The circuit board assembly 230 is electrically connected to the Hall element 220 and the coil assembly 210. The circuit board assembly 230 can determine the movement of the magnetic rotor 130, the opening degree of the valve device 10, the size of the throttle orifice 161, etc., based on the Hall signals. When the stop member 120 is at the top dead center position, the projection of the rotor connector 110 along the radial direction of the valve device 10 also overlaps with the Hall element 220. When the stop 120 is at the bottom dead center, the projection of the rotor connector 110 along the radial direction of the valve device 10 does not overlap with the Hall element 220. This arrangement ensures that the rotor connector 110 is always no higher than the Hall element 220, thereby placing the rotor connector 110 in a relatively deep position within the inner cavity of the magnetic rotor 130. This contributes to a more compact structure for both the rotor connector 110 and the magnetic rotor 130. Considering that the first and second segments have an upwardly tapering shape, this arrangement facilitates welding of the rotor connector 110 and the stop 120 at a relatively deep position within the inner cavity of the magnetic rotor 130.

[0062] like Figure 7 and Figure 8In the first embodiment shown, the stator assembly 200 includes a housing portion 240, a circuit board assembly 230, and a Hall assembly 220 located within the cavity of the housing portion 240. When the stop member 120 is at the upper stop position, the projection of the protrusion 111 along the radial direction of the valve device 10 overlaps with the housing portion 240; when the stop member 120 is at the lower stop position, the projection of the protrusion 111 along the radial direction of the valve device 10 does not overlap with the housing portion 240.

[0063] like Figure 9 In the first embodiment shown, the coil encapsulation portion 211 and the housing portion 240 are integrally injection molded structures, with the housing portion 240 located axially above the coil encapsulation portion 211.

[0064] like Figure 3 and Figure 4 In the first embodiment shown, the rotor connector 110 has a second hole 112, and a portion of the lead screw 140 is located in the second hole 112, that is, the lead screw 140 passes through the rotor connector 110, and the rotor connector 110 is laser welded to the upper end 141 of the lead screw 140.

[0065] like Figure 6 In the first embodiment shown, the connecting part 121 is C-shaped and the connecting part 121 is press-fitted with the protrusion 111. This arrangement ensures that the first outer peripheral wall 1111 and the first inner peripheral wall 1213 can always remain in contact.

[0066] The above-described embodiments are merely examples of several implementations of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications without departing from the concept of this utility model, and these modifications all fall within the protection scope of this utility model.

Claims

1. A valve device, characterized in that, The device includes a rotor connector (110) and a stop (120). The rotor connector (110) includes a protrusion (111) and a base plate (113). The protrusion (111) protrudes upward from the first end wall (1131) of the base plate (113). The stop (120) includes a receiving portion (1211) and a second end wall (1212). The first end wall (1131) and the second end wall (1212) are in a limiting fit. The first outer peripheral wall (1111) of the protrusion (111) and the stop are... The first inner peripheral wall (1213) of the receiving portion (1211) is in a limiting fit, and at least one of the rotor connector (110) and the stop (120) has a clearance portion, which is disposed at the transition connection between the first end wall (1131) and the first outer peripheral wall (1111) and / or the clearance portion is disposed at the transition connection between the second end wall (1212) and the first inner peripheral wall (1213), and the clearance portion causes the stop (120) to avoid the rotor connector (110).

2. The valve device according to claim 1, characterized in that, The clearance portion includes a first clearance portion, which is disposed at the transition connection between the first end wall (1131) and the first outer peripheral wall (1111), and the first clearance portion is recessed into the rotor connector (110).

3. The valve device according to claim 2, characterized in that, The first clearance portion includes a first recess (114), which is recessed inward from the first end wall (1131), and the opening direction of the first recess (114) is perpendicular to the plane where the first end wall (1131) is located.

4. The valve device according to claim 2 or 3, characterized in that, The first clearance portion includes a second recess (115), which is recessed inward from the first outer peripheral wall (1111), and the opening direction of the second recess (115) is parallel to the plane where the first end wall (1131) is located.

5. The valve device according to claim 4, characterized in that, The clearance portion includes a second clearance portion, which is disposed at the transition connection between the second end wall (1212) and the first inner peripheral wall (1213). A gap is provided between the transition connection between the first end wall (1131) and the first outer peripheral wall (1111) and the second clearance portion.

6. The valve device according to any one of claims 1 to 3, characterized in that, The clearance portion includes a second clearance portion, which is disposed at the transition connection between the second end wall (1212) and the first inner peripheral wall (1213). A gap is provided between the transition connection between the first end wall (1131) and the first outer peripheral wall (1111) and the second clearance portion.

7. The valve device according to claim 5, characterized in that, The stop (120) is an integral structure formed by stamping, and the tapered surface (123) of the second clearance part is smoothly transitioned between the second end wall (1212) and the first inner peripheral wall (1213).

8. The valve device according to claim 6, characterized in that, The stop (120) is an integral structure formed by stamping, and the tapered surface (123) of the second clearance part is smoothly transitioned between the second end wall (1212) and the first inner peripheral wall (1213).

9. The valve device according to claim 5, characterized in that, The second clearance portion includes an inner end wall (1241) and an inner circular surface (1242). The inner end wall (1241) is located between the first inner peripheral wall (1213) and the inner circular surface (1242). The inner circular surface (1242) is located between the inner end wall (1241) and the second end wall (1212). The diameter of the inner circular surface (1242) is larger than the diameter of the first inner peripheral wall (1213).

10. The valve device according to claim 6, characterized in that, The second clearance portion includes an inner end wall (1241) and an inner circular surface (1242). The inner end wall (1241) is located between the first inner peripheral wall (1213) and the inner circular surface (1242). The inner circular surface (1242) is located between the inner end wall (1241) and the second end wall (1212). The diameter of the inner circular surface (1242) is larger than the diameter of the first inner peripheral wall (1213).

11. The valve device according to any one of claims 5, 7-10, characterized in that, The rotor connector includes a transition portion (116), which is located between the first end wall (1131) and the first outer peripheral wall (1111) and forms a smooth transition. The transition portion (116) is spaced apart from the second clearance portion.

12. The valve device according to claim 4, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper end (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower end (143) of the lead screw (140) is in a limiting fit with the valve core (150). A throttling orifice (161) is formed between the valve core (150) and the valve port (160). The lead screw (140) can drive the valve core (150) to move axially, thereby adjusting the size of the throttling orifice (161).

13. The valve device according to claim 6, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper end (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower end (143) of the lead screw (140) is in a limiting fit with the valve core (150). A throttling orifice (161) is formed between the valve core (150) and the valve port (160). The lead screw (140) can drive the valve core (150) to move axially, thereby adjusting the size of the throttling orifice (161).

14. The valve device according to claim 11, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper end (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower end (143) of the lead screw (140) is in a limiting fit with the valve core (150). A throttling orifice (161) is formed between the valve core (150) and the valve port (160). The lead screw (140) can drive the valve core (150) to move axially, thereby adjusting the size of the throttling orifice (161).

15. The valve device according to any one of claims 1-3, 5, 7-10, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper end (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower end (143) of the lead screw (140) is in a limiting fit with the valve core (150). A throttling orifice (161) is formed between the valve core (150) and the valve port (160). The lead screw (140) can drive the valve core (150) to move axially, thereby adjusting the size of the throttling orifice (161).

16. The valve device according to claim 4, characterized in that, The rotor connector (110) is made of metal, the stop (120) is made of metal, and the rotor connector (110) and the stop (120) are laser welded together to form a weld (400).

17. The valve device according to claim 6, characterized in that, The rotor connector (110) is made of metal, the stop (120) is made of metal, and the rotor connector (110) and the stop (120) are laser welded together to form a weld (400).

18. The valve device according to claim 11, characterized in that, The rotor connector (110) is made of metal, the stop (120) is made of metal, and the rotor connector (110) and the stop (120) are laser welded together to form a weld (400).

19. The valve device according to claim 15, characterized in that, The rotor connector (110) is made of metal, the stop (120) is made of metal, and the rotor connector (110) and the stop (120) are laser welded together to form a weld (400).

20. The valve device according to any one of claims 1-3, 5, 7-10, 12-14, characterized in that, The rotor connector (110) is made of metal, the stop (120) is made of metal, and the rotor connector (110) and the stop (120) are laser welded together to form a weld (400).

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