Valve device

Abstract

This utility model provides a valve device, including a rotor connector and a stop member. The rotor connector and the stop member are fixed by laser welding to form a weld. The rotor connector includes an installation section and a clearance section. The stop member includes a receiving portion. At least part of the installation section is located in the inner cavity of the receiving portion. The outer diameter of the clearance section is smaller than the outer diameter of the installation section. The clearance section includes a first section and a clearance portion. The outer wall of the clearance portion is located between the outer peripheral wall of the installation section and the outer peripheral wall of the first section. The weld is formed on the upper end wall of the stop member and the outer wall of the clearance portion. The clearance section can avoid the laser beam and allow the laser beam to shine on the connection between the stop member and the clearance portion, so that the laser beam angle range for laser welding the rotor connector and the stop member is relatively large.

Description

Technical Field

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

[0002] The valve assembly includes a rotor connector, a stop, and a magnetic rotor. The rotor connector and the stop are fixed by laser welding. During the laser welding of the valve assembly, the laser beam angle is 45°. However, when the rotor connector needs to be placed deep inside the magnetic rotor cavity, the 45° laser beam may interfere with the magnetic rotor, making welding impossible. Utility Model Content

[0003] The purpose of this application is to provide a valve device that allows for a relatively large range of laser beam angles for laser welding rotor connectors and stop members.

[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 and the stop member being fixed by laser welding to form a weld. The rotor connector includes a protrusion, the protrusion including a mounting section and a clearance section. The stop member includes a receiving section, at least a portion of the mounting section being located within the cavity of the receiving section. The upper opening of the cavity of the receiving section is located on the upper end wall of the stop member. The clearance section passes through the upper opening of the cavity of the receiving section and protrudes upward relative to the upper end wall of the stop member. The outer diameter of the clearance section is smaller than the outer diameter of the mounting section. The clearance section includes a first section and a clearance portion. The outer wall of the clearance portion is located between the outer peripheral wall of the mounting section and the outer peripheral wall of the first section. The weld is formed on the upper end wall of the stop member and the outer wall of the clearance portion.

[0006] In the valve device provided in this application, the outer diameter of the clearance section is smaller than the outer diameter of the mounting section. The clearance section includes a first section and a clearance portion. The outer wall of the clearance portion is located between the outer peripheral wall of the mounting section and the outer peripheral wall of the first section. The weld is formed on the upper end wall of the stop and the outer wall of the clearance portion. During the laser welding process of the valve device, the clearance section can avoid the laser beam, so that the laser beam angle range for laser welding of the rotor connector and the stop is relatively large. This makes the laser welding process of the valve device relatively simple and convenient, and thus helps to improve the weld quality. Attached Figure Description

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

[0008] Figure 2 for 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 schematic diagram of the rotor connector in the process;

[0011] Figure 5 for Figure 2 A structural diagram of the stop component in the middle;

[0012] Figure 6 for Figure 1 A cross-sectional structural diagram of the valve device when the stop element is in the lower stop position;

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

[0014] Figure 8 for Figure 1 An exploded structural diagram of the central valve device;

[0015] Figure 9 for Figure 8 A schematic diagram of a portion of the central valve assembly;

[0016] Figure 10 This is a partially enlarged structural diagram of the second embodiment;

[0017] Figure 11 This is a partially enlarged structural diagram of the third embodiment;

[0018] 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 seat, 180-slip ring, 190-spring guide rail, 111-protrusion, 112-through hole, 113-base, 1111-mounting section, 1112-first section, 1113-second section, 1114-first upper end wall, 1113a-first conical surface, 1113b-second conical surface, 121-connector 122-stop rod, 1211-receiving part, 131-upper end, 141-upper rod part, 142-middle section, 143-lower rod part, 161-throttle port, 171-threaded hole, 181-radial extension section, 191-upper stop part, 192-lower stop part, 210-coil assembly, 220-Hall assembly, 230-circuit board assembly, 240-box part, 211-coil encapsulation part, 212-coil, α-inclination angle of the first conical surface relative to the axial direction of the valve device, β-inclination angle of the second conical surface relative to the axial direction of the valve device, L-direction of the laser beam. Detailed Implementation

[0019] 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.

[0020] The valve device 10 provided in this embodiment 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 the above-mentioned types of cooling systems, the valve device 10 is generally used as a throttling element, a switching element, or an element that combines throttling and switching functions. This application describes the valve device 10 as a throttling element.

[0021] The following is combined Figures 1 to 11 The 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.

[0022] like Figures 2 to 5In the first embodiment shown, the rotor connector 110 and the stop 120 are fixed by laser welding to form a weld 400. The rotor connector 110 includes a protrusion 111, which includes a mounting section 1111 and a clearance section. The stop 120 includes a connecting section 121, which includes a first receiving section 1211. At least a portion of the mounting section 1111 is located within the cavity of the first receiving section 1211. The inner peripheral wall of the cavity of the first receiving section 1211 is in contact with the corresponding portion of the outer peripheral wall of the mounting section 1111. The upper opening of the cavity of the first receiving section 1211 is located within the stop. The upper end wall of the moving member 120 and the upper end wall of the stop member 120 may be the upper end wall of the connecting part 121. The clearance section passes through the upper opening of the inner cavity of the first receiving part 1211 and protrudes upward relative to the upper end wall of the stop member 120. The clearance section includes a first section 1112 and a clearance part. The outer diameter of the clearance section is smaller than the outer diameter of the mounting section 1111. The outer diameter of the first section 1112 is also smaller than the outer diameter of the mounting section 1111. The outer wall of the clearance part is located between the outer peripheral wall of the mounting section 1111 and the outer peripheral wall of the first section 1112. The weld 400 is formed on the upper end wall of the stop member 120 and the outer wall of the clearance part. With this configuration, during the laser welding process of the valve device 10, the first section 1112 and the avoidance part can avoid the laser beam and allow the laser beam to shine on the connection between the stop and the avoidance part. This makes the laser beam angle range for laser welding the rotor connector 110 and the stop 120 relatively large, which is beneficial to making the laser welding process of the valve device 10 relatively simple and convenient, and thus helps to improve the quality of the weld 400.

[0023] like Figures 2 to 5 In the first embodiment shown, the clearance portion includes a second segment 1113, which is located between the mounting segment 1111 and the first segment 1112. Along the axial direction from the mounting segment 1111 to the first segment 1112, the second segment 1113 has a tapered cross-section. Alternatively, it can be said that along the direction in which the valve core 150 is raised relative to the valve port 160, the cross-section of the second segment 1113 gradually decreases. During the assembly of the rotor connector 110 and the stop 120, the second segment 1113 also plays a guiding role in the assembly of the stop, thereby making the assembly of the rotor connector 110 and the stop 120 simpler and more convenient.

[0024] like Figure 3 and Figure 4In the first embodiment shown, the outer peripheral wall of the second segment 1113 includes a first conical surface 1113a and a second conical surface 1113b. The first conical surface 1113a is located at the end of the second conical surface 1113b that is close to the outer peripheral wall of the mounting segment 1111. The taper of the second conical surface 1113b is smaller than the taper of the first conical surface 1113a. The taper of the first conical surface 1113a that is close to the mounting segment 1111 is relatively larger, which makes the included angle between the first conical surface 1113a and the upper end wall of the stop member 120 relatively larger, thereby making it more conducive to improving the laser beam angle range.

[0025] like Figure 3 In the first embodiment shown, the taper of the first conical surface 1113a is defined as 2*tanα, and the taper of the second conical surface 1113b is defined as 2*tanβ, where tan is the tangent function, α is the tilt angle of the outer peripheral wall of the first conical surface relative to the axial direction of the valve device 10, β is the tilt angle of the outer peripheral wall of the second conical surface relative to the axial direction of the valve device 10, and 20°<α<30°, 5°<β<20°.

[0026] In some embodiments, the number of second conical surfaces 1113b is at least two, and the at least two second conical surfaces 1113b are arranged along the axial direction of the valve device 10. Along the direction in which the valve core 150 sits on the valve port 160, the taper of the at least two second conical surfaces 1113b increases sequentially.

[0027] like Figures 2 to 5 In the first embodiment shown, the first conical surface 1113a is located between the outer peripheral wall of the mounting section 1111 and the second conical surface 1113a, and the first conical surface 1113a is smoothly transitioned. The second conical surface 1113b is located between the first conical surface 1113a and the outer peripheral wall of the first section 1112, and the second conical surface 1113b is also smoothly transitioned.

[0028] In some embodiments, the outer peripheral wall of the second segment 1113 may also include an arcuate surface, which is recessed inward. The arcuate surface also facilitates the assembly and laser welding of the stop 120 and the rotor connector 110.

[0029] like Figure 10 In the second embodiment shown, the clearance portion includes a first upper end wall 1114. The outer diameter of the clearance section is smaller than the outer diameter of the mounting section 1111. The first upper end wall 1114 is located between the outer peripheral wall of the first section 1112 and the outer peripheral wall of the clearance section. The plane where the first upper end wall 1114 is located is perpendicular to the axial direction of the protrusion. The weld 400 is formed on the first upper end wall 1114. With this arrangement, the first upper end wall 1114 and the upper end wall of the stop member 120 can be basically flush, which makes the laser beam angle range relatively larger, thereby making the welding of the valve device simpler and more convenient.

[0030] like Figure 11 In the third embodiment shown, the clearance portion includes a second segment 1113 and a first upper end wall 1114. The outer peripheral wall of the second segment 1113 is located between the outer peripheral wall of the first segment 1112 and the first upper end wall 1114, and the first upper end wall 1114 is located between the outer peripheral wall of the second segment 1113 and the outer peripheral wall of the mounting segment 1111.

[0031] like Figures 2 to 5 In the first embodiment shown, the avoidance section consists of a first section 1112 and a second section 1113, and the avoidance part is the second section 1113.

[0032] like Figure 10 In the second embodiment shown, the avoidance section consists of a first section 1112 and an avoidance part, which is the first upper end wall 1114.

[0033] like Figure 11 In the third embodiment shown, the avoidance section consists of a first section 1112 and an avoidance part, and the avoidance part consists of a second section 1113 and a first upper end wall 1114.

[0034] like Figure 3 , Figure 10 , Figure 11 In the first to third embodiments shown, the inner peripheral wall of the first receiving portion 1211 is in contact with the outer peripheral wall of the mounting section 1111, and the upper edge of the outer peripheral wall of the mounting section 1111 is flush with the upper end wall of the rotor connector 110, so as to facilitate the formation of welds on the outer wall of the clearance portion and the upper end wall of the stop member 120.

[0035] like Figure 3 In the first embodiment shown, the lower edge of the second conical surface 1113b is connected to the upper edge of the outer peripheral wall of the mounting section 1111, and the lower edge of the second conical surface 1113b is flush with the upper end wall of the stop member 120.

[0036] like Figure 10 and Figure 11 In the second and third embodiments shown, the outer edge of the first upper wall 1114 is connected to the upper edge of the outer peripheral wall of the mounting section 1111, and the first upper wall 1114 is flush with the upper wall of the stop member 120.

[0037] like Figure 2In the first embodiment shown, the rotor connector 110 and the stop 120 are located in the inner cavity of the magnetic rotor 130. The projection of the rotor connector 110 along the radial direction of the valve device 10 does not overlap with the upper end 131 of the magnetic rotor 130, and the projection of the stop 120 along the radial direction of the valve device 10 does not overlap with the upper end 131 of the magnetic rotor 130. This arrangement allows the rotor connector 110 and the stop 120 to be located in a relatively deep position within the inner cavity of the magnetic rotor 130. The angle between the plane containing the upper end wall of the stop 120 and the direction of the laser beam in laser welding is defined as α. It should be noted that α is the laser beam angle in laser welding.

[0038] In some embodiments, 60° ≤ a ≤ 120°. Further, in some embodiments, a is preferably between 90° and 100°.

[0039] like Figure 3 In the first embodiment shown, the laser beam direction is set perpendicular to the upper end wall of the stop 110, i.e., a=90°. Considering that there is a certain degree of processing during the actual processing of the valve device, a certain degree of deviation of a is allowed.

[0040] like Figure 6 and Figure 7 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. When the stop member 120 is at the top dead center position, the projection of the rotor connector 111 along the radial direction of the valve device 10 overlaps with the coil assembly 210. When the stop member 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 confined to move within the inner cavity of the coil assembly 210, making the structure of the valve device 10 relatively compact.

[0041] like Figure 7 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 base plate portion 113 in the radial direction of the valve device 10 overlaps with the coil encapsulation portion 211, and the projection of the base plate portion 113 in the radial direction of the valve device 10 also overlaps with the claw pole housing.

[0042] like Figure 6 and Figure 7In the first embodiment shown, the upper rod portion 141 of the lead screw 140 is fixedly disposed with the rotor connector 110, and the lower rod portion 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 portion 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 portion 160 or be raised relative to the valve port portion 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.

[0043] like Figure 7 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 6 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.

[0044] 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. The intermediate section 142 is located between the upper rod portion 141 and the lower rod portion 143 of the lead screw 140. The intermediate section 142 is threadedly engaged with the mounting base 170. 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.

[0045] 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.

[0046] like Figure 6 , Figure 7 and Figure 9In 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.

[0047] like Figure 9 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.

[0048] like Figure 2 In the first embodiment shown, the Hall element 220 is located on one axial side of the coil assembly 210, and the sensing surface 221 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 change of the magnetic rotor 130 and generate a Hall signal. 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 signal. When the stop member 120 is at the top dead center position, the projection of the magnetic rotor 130 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 position, the projection of the rotor connector 110 along the radial direction of the valve device 10 does not overlap with the Hall component 220, while the projection of the upper end of the magnetic rotor 130 along the radial direction of the valve device 10 overlaps with the Hall component 220. This arrangement ensures that the rotor connector 110 is not higher than the Hall component 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 conical surfaces have a cross-sectional contraction 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.

[0049] like Figure 2In 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.

[0050] like Figure 2 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.

[0051] like Figure 2 and Figure 3 In the first embodiment shown, the rotor connector 110 includes a base plate portion 113. The upper end wall of the base plate portion 113 is in contact with the lower end wall of the connecting portion 121. The protrusion 111 protrudes upward from the upper end wall of the base plate portion 113. The lower opening of the inner cavity of the first receiving portion 1211 is located on the lower end wall of the connecting portion 121. The mounting section passes through the lower opening of the first receiving portion 1211 and can be located in the inner cavity of the first receiving portion 1211. The thickness of the connecting portion 121 is defined as t, and the height of the mounting section is defined as s. t and s are basically equal. This setting is beneficial to improving the weld quality. Considering that there is a certain degree of processing error in the actual processing of the valve device, t and s are allowed to have a certain degree of deviation.

[0052] like Figure 2 and Figure 4 In the first embodiment shown, the rotor connector 110 has a through hole 112, a portion of the lead screw 140 is located in the through hole 112, the upper opening of the through hole 112 is located on the upper end wall of the first section 1112, the lead screw 140 passes through the upper opening of the through hole 112, the lower opening of the through hole 112 is located on the lower end wall of the base plate portion 113, the lead screw 140 passes through the lower opening of the through hole 112, and the first section 1112 and the lead screw 140 are laser welded together.

[0053] like Figure 2 and Figure 5 In the first embodiment shown, the connecting portion 121 is C-shaped, and the connecting portion 121 and the protrusion 111 are press-fitted together. This arrangement ensures that the outer peripheral wall of the mounting section and the inner peripheral wall forming the first receiving portion 1211 can always remain in contact.

[0054] The above embodiments only illustrate several implementation methods of this application, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that for those skilled in the art, several modifications can be made 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), which are fixed by laser welding to form a weld (400). The rotor connector (110) includes a protrusion (111), which includes a mounting section (1111) and a clearance section. The stop (120) includes a receiving section (1211), at least a portion of which is located within the cavity of the receiving section (1211). The upper opening of the cavity of the receiving section (1211) is located within the cavity of the receiving section (1211). On the upper end wall of the stop (120), the clearance section passes through the upper opening of the cavity of the receiving part (1211) and protrudes upward relative to the upper end wall of the stop (120). The outer diameter of the clearance section is smaller than the outer diameter of the mounting section (1111). The clearance section includes a first section (1112) and a clearance part. The outer wall of the clearance part is located between the outer peripheral wall of the mounting section (1111) and the outer peripheral wall of the first section (1112). The weld (400) is formed on the upper end wall of the stop and the outer wall of the clearance part.

2. The valve device according to claim 1, characterized in that, The avoidance part includes a second section (1113), which is located between the mounting section (1111) and the first section (1112) in the axial direction from the mounting section (1111) toward the first section (1112). The second section (1113) has a tapered cross section.

3. The valve device according to claim 2, characterized in that, The outer peripheral wall of the second segment (1113) includes a first conical surface (1113a) and a second conical surface (1113b). The first conical surface (1113a) is located at one end of the second conical surface (1113b) near the outer peripheral wall of the mounting segment (1111). The taper of the second conical surface (1113b) is smaller than the taper of the first conical surface (1113a).

4. The valve device according to claim 3, characterized in that, The first conical surface (1113a) is located between the outer peripheral wall of the first segment (1112) and the second conical surface (1113b), and the first conical surface (1113a) is smoothly transitioned.

5. The valve device according to any one of claims 1 to 4, characterized in that, The clearance portion includes a first upper end wall (1114), which is located between the outer peripheral wall of the mounting section (1111) and the outer peripheral wall of the first section (1112). The plane of the first upper end wall (1114) is perpendicular to the axial direction of the protrusion (111).

6. The valve device according to claim 5, characterized in that, The inner peripheral wall of the receiving part (1211) is in contact with the outer peripheral wall of the mounting section (1111), and the upper edge of the outer peripheral wall of the mounting section (1111) is flush with the upper end wall of the stop (120).

7. The valve device according to any one of claims 1 to 4, characterized in that, The inner peripheral wall of the receiving part (1211) is in contact with the outer peripheral wall of the mounting section (1111), and the upper edge of the outer peripheral wall of the mounting section (1111) is flush with the upper end wall of the stop (120).

8. The valve device according to claim 5, characterized in that, The valve device includes a magnetic rotor (130), and the rotor connector (110) is located in the inner cavity of the magnetic rotor (130). The projection of the rotor connector (110) along the radial direction of the valve device (10) does not overlap with the upper end (131) of the magnetic rotor (130). The angle between the plane where the upper end wall of the stop (120) is located and the direction of the laser beam of the laser welding is defined as α, where 60°≤α≤120°.

9. The valve device according to claim 7, characterized in that, The valve device includes a magnetic rotor (130), and the rotor connector (110) is located in the inner cavity of the magnetic rotor (130). The projection of the rotor connector (110) along the radial direction of the valve device (10) does not overlap with the upper end (131) of the magnetic rotor (130). The angle between the plane where the upper end wall of the stop (120) is located and the direction of the laser beam of the laser welding is defined as α, where 60°≤α≤120°.

10. The valve device according to any one of claims 1-4, 6, characterized in that, The valve device includes a magnetic rotor (130), and the rotor connector (110) is located in the inner cavity of the magnetic rotor (130). The projection of the rotor connector (110) along the radial direction of the valve device (10) does not overlap with the upper end (131) of the magnetic rotor (130). The angle between the plane where the upper end wall of the stop (120) is located and the direction of the laser beam of the laser welding is defined as α, where 60°≤α≤120°.

11. The valve device according to claim 10, characterized in that, The laser beam direction is perpendicular to the plane of the upper end wall of the stop (120). The valve device (10) includes a Hall component (220). The sensing surface of the Hall component (220) is disposed facing the outer peripheral wall of the magnetic rotor (130). When the stop (120) is located at the lower stop position, the projection of the upper end (131) of the magnetic rotor (130) along the radial direction of the valve device (10) overlaps with the Hall component (220).

12. The valve device according to claim 10, characterized in that, The valve device (10) includes a coil assembly (210) which is arranged around the outer peripheral wall 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) overlaps with the coil assembly (210).

13. The valve device according to claim 8, 9, or 11, characterized in that, The valve device (10) includes a coil assembly (210) which is arranged around the outer peripheral wall 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) overlaps with the coil assembly (210).

14. The valve device according to claim 8 or 9, characterized in that, The laser beam direction is perpendicular to the plane of the upper end wall of the stop (120). The valve device (10) includes a Hall component (220). The sensing surface of the Hall component (220) is disposed facing the outer peripheral wall of the magnetic rotor (130). When the stop (120) is located at the lower stop position, the projection of the upper end (131) of the magnetic rotor (130) along the radial direction of the valve device (10) overlaps with the Hall component (220).

15. The valve device according to claim 14, characterized in that, The valve device (10) includes a coil assembly (210) which is arranged around the outer peripheral wall 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) overlaps with the coil assembly (210).

16. The valve device according to claim 5, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

17. The valve device according to claim 7, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

18. The valve device according to claim 10, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

19. The valve device according to claim 13, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

20. The valve device according to claim 14, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

21. The valve device according to any one of claims 1-4, 6, 8, 9, 11, 12, and 15, characterized in that, The valve device (10) includes a lead screw (140), a valve core (150), and a valve port (160). The upper rod portion (141) of the lead screw (140) is fixedly connected to the rotor connector (110), and the lower rod portion (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).

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