Valve device

Abstract

A valve device comprises a nut part and a connecting part, and one of the nut part and the connecting part is provided with an embedding cavity. The other one of the nut part and the connecting part comprises a connecting seat and an embedded part, the embedded part and the connecting seat are of an integrated structure, and at least part of the embedded part is located in the embedded cavity; the nut part or the connecting part is injection-molded by taking the embedded part as an insert, and the nut part or the connecting part is fixed with the embedded part through injection molding, so that the assembly steps can be simplified.

Description

Technical Field

[0001] This application relates to the technical field of fluid control, and particularly relates to a valve device. Background Art

[0002] In a thermal management system, a valve device is often used as a throttling element, and the valve device can achieve a throttling function according to the needs of the system.

[0003] However, in the current valve device, the nut assembly is fixed by welding the connecting plate to the connecting seat, which is cumbersome to assemble and affects the assembly time. Summary of the Invention

[0004] The purpose of this application is to provide a valve device that can simplify the assembly.

[0005] To achieve the above purpose, an embodiment of this application adopts the following technical solution:

[0006] A valve device includes a nut component and a connecting component, and one of the nut component and the connecting component has an embedding cavity; the other of the nut component and the connecting component includes a connecting seat and an embedding member, the embedding member and the connecting seat are of an integral structure, and at least part of the embedding member is located in the embedding cavity; the nut component or the connecting component is injection molded with the embedding member as an insert, and the nut component or the connecting component is injection fixed to the embedding member.

[0007] In an embodiment provided by this application, the valve device includes a nut component and a connecting component, the embedding member and the connecting seat are of an integral structure, and at least part of the embedding member is located in the embedding cavity. The nut component or the connecting component is injection molded with the embedding member as an insert, and the nut component or the connecting component is injection fixed to the embedding member. The nut component and the connecting component can be assembled as one part, thus simplifying the assembly steps and improving the assembly efficiency. Brief Description of the Drawings

[0008] Figure 1 is a three-dimensional structural schematic diagram of an embodiment of the valve device provided by this application;

[0009] Figure 2 is Figure 1 the top view of the valve device in

[0010] Figure 3 is Figure 2 the sectional structural schematic diagram of the valve device in

[0011] Figure 4 is Figure 2 the sectional structural schematic diagram of the valve device in

[0012] Figure 5 is Figure 3Schematic diagram of the partial enlarged structure at location A in [the figure];

[0013] Figure 6 is Figure 3 Schematic diagram of the partial enlarged structure at location B in [the figure];

[0014] Figure 7 is Figure 1 Combined schematic diagram of the valve seat component, connection component and nut component in [the figure];

[0015] Figure 8 is Figure 7 Three-dimensional structure schematic diagram of the connection component in [the figure];

[0016] Figure 9 is Figure 7 Combined schematic diagram of the nut component and the connection component in [the figure];

[0017] Figure 10 is Figure 9 Exploded schematic diagram of the nut component and the connection component in [the figure];

[0018] Figure 11 Three-dimensional structure schematic diagram of another embodiment of the valve device provided by this application;

[0019] Figure 12 is Figure 11 Schematic diagram of the partial enlarged structure at location C in [the figure].

[0020] Explanation of the reference numerals in the attached drawings:

[0021] 100, valve device; 10, nut component; 11, embedding cavity; 111, first wall surface; 112, second wall surface; 12, groove; 121, third wall surface; 122, fourth wall surface; 13, nut sleeve; 14, nut tube; 141, mating part; 15, seal; 16, elastic member; 17, valve stem; 18, valve sleeve; 19, sleeve; 20, connection component; 21, connection seat; 211, first part; 212, second part; 213, first accommodation cavity; 2131, stop wall surface; 214, second accommodation cavity; 2141, abutting wall surface; 22, embedding member; 221, abutting part; 222, extending part; 223, bending part; 224, bump; 30, valve seat component; 31, inlet part; 32, outlet part; 40, valve port seat; 41, first through hole; 50, first valve core member; 51, inner cavity; 52, second through hole; 53, balance hole; 60, second valve core member; 61, sliding part; 62, avoiding part; 70, drive assembly; 71, rotor component; 711, magnet; 72, fastener; 721, stop member; 80, sealing ring. Detailed implementation manners

[0022] To make the above objects, features, and advantages of the present invention more apparent and understandable, the following provides a detailed description of the specific embodiments of the present invention with reference to the accompanying drawings. A lot of specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0023] The following further illustrates the present application with reference to the accompanying drawings and specific embodiments:

[0024] The valve device 100 can be applied to the air conditioners, heat pump systems, and battery thermal management systems of new energy vehicles, and is suitable for refrigerant valves in vehicle thermal management systems using traditional refrigerants (such as R134a) and environmentally friendly refrigerants (such as R1234yf / R410A / R744), especially the air conditioner refrigerant valve that performs on-off valve operations by rotating the valve stem 17.

[0025] Figures 1 to 10 An embodiment of a valve device 100 is schematically shown. The valve device 100 includes a nut member 10 and a connecting member 20.

[0026] Combined with Figure 3 and Figure 4 As shown, one of the nut member 10 and the connecting member 20 has an embedding cavity 11; the other of the nut member 10 and the connecting member 20 includes a connecting seat 21 and an embedding member 22. The embedding member 22 and the connecting seat 21 are an integral structure, and at least part of the embedding member 22 is located in the embedding cavity 11; the nut member 10 or the connecting member 20 is injection-molded with the embedding member 22 as an insert, and the nut member 10 or the connecting member 20 is injection-fixed to the embedding member 22. The embedding cavity 11 in this embodiment is preferably but not limited to a groove structure or a hole structure.

[0027] Specifically, in this embodiment, the nut component 10 has an embedding cavity 11; the connecting component 20 includes a connecting seat 21 and an embedding member 22; the nut component 10 is injection molded with the embedding member 22 as an insert, and the nut component 10 and the embedding member 22 are injection fixed. It should be noted that since the embedding member 22 and the connecting seat 21 are of an integral structure and at least part of the embedding member 22 is located in the embedding cavity 11 of the nut component 10, the nut component 10 is injection molded with the embedding member 22 as an insert and the nut component 10 and the embedding member 22 are injection fixed, so that the connecting component 20 is injection fixed to the nut component 10 through the embedding member 22, and the nut component 10 and the connecting component 20 can be assembled as one part. In this way, on the one hand, the assembly time of the valve device 100 can be reduced and the assembly efficiency can be improved; on the other hand, the overall strength of the integrally injection molded nut component 10 and connecting component 20 can be improved. In addition, the connecting component 20 is injection fixed to the nut component 10 through the embedding member 22, which can improve the coaxiality of the nut component 10 and the connecting component 20, thereby improving the matching accuracy of the nut component 10 and the connecting component 20. In this embodiment, the nut component 10 is a plastic part. Compared with a metal part, the plastic part has a smaller frictional force and will not affect the thread fit between the nut component 10 and the valve stem 17. In addition, using a plastic part instead of a metal part can reduce costs.

[0028] Please refer specifically to Figures 8 to 10 , in this embodiment, the nut component 10 includes a nut sleeve 13 and a nut tube 14. Along the axial direction of the valve device 100, the nut tube 14 extends from the nut sleeve 13 in a direction away from the connecting component 20. The nut sleeve 13 and the nut tube 14 are of an integral structure. In other embodiments, the nut sleeve 13 and the nut tube 14 may also be a detachable split structure. Specifically, the nut component 10 has a groove 12, and the groove 12 communicates with the embedding cavity 11. Both the groove 12 and the embedding cavity 11 are located in the nut sleeve 13; the embedding member 22 includes an abutting portion 221 and an extending portion 222. At least part of the abutting portion 221 is located in the groove 12. Along the axial direction of the valve device 100, the extending portion 222 extends from the abutting portion 221 in a direction towards the embedding cavity 11, and at least part of the extending portion 222 is located in the embedding cavity 11. Along the radial direction of the valve device 100, the size of the groove 12 is larger than the size of the embedding cavity 11. In some embodiments, this size may be a diameter, a width or a height. In this embodiment, this size is preferably a diameter.

[0029] Combined with Figures 3 to 5 and Figures 8 to 10 shown, in this embodiment, the extending portion 222 and the abutting portion 221 are of an integral structure. The extending portion 222 extends from the abutting portion 221 in a direction towards the embedding cavity 11, and at least part of the extending portion 222 is located in the embedding cavity 11, so that at least part of the extending portion 222 can be embedded in the embedding cavity 11, and the overall strength of the integrally injection molded nut component 10 and connecting component 20 is higher.

[0030] Furthermore, the wall forming the embedding cavity 11 includes a first wall surface 111 and a second wall surface 112. Along the axial direction of the valve device 100, the first wall surface 111 is located on the upper wall surface of the embedding cavity 11, and the second wall surface 112 is located on the lower wall surface of the embedding cavity 11. The first wall surface 111 is farther from the groove 12 than the second wall surface 112; the insert 22 further includes a bending portion 223. Along the radial direction of the valve device 100, the bending portion 223 extends inwards or outwards from the extending portion 222, and at least a part of the bending portion 223 is located in the groove 12; along the axial direction of the valve device 100, one end of the bending portion 223 abuts against the first wall surface 111, and the other end of the bending portion 223 abuts against the second wall surface 112. It should be noted that the bending portion 223 extends inwards or outwards from the extending portion 222 into the embedding cavity 11. This bending method can be a horizontal bend, an inclined bend or other methods with a special-shaped bending channel, as long as at least a part of the bending portion 223 can be located in the embedding cavity 11. In this embodiment, along the radial direction of the valve device 100, the bending portion 223 extends into the embedding cavity 11 from the extending portion 222 in a horizontal bending manner, so that the connecting component 20 and the nut component 10 can be better combined, thereby improving the overall strength of the valve device 100. The insert 22 further includes a convex block 224, and the number of the convex blocks 224 is at least one. Specifically, in this embodiment, the number of the convex blocks 224 is multiple, and the multiple convex blocks 224 surround the outer periphery of the abutting portion 221, so that the bonding strength between the connecting component 20 and the nut component 10 can be further improved. It can be understood that the convex block 224 can be a cube structure, a semi-cylindrical structure or a cylindrical structure, as long as the insert 22 can be embedded in the groove 12 and can improve the bonding strength between the connecting component 20 and the nut component 10. In addition, along the axial direction of the valve device 100, the height of the convex block 224 may or may not be the same as the height of the abutting portion 221. In this embodiment, the height of the convex block 224 is the same as the height of the abutting portion 221.

[0031] The terms "first", "second", "third", and "fourth" in this specification are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features.

[0032] It should be noted that the orientation terms such as up, down, left, right, front, and back mentioned in this specification are based on the orientation in the accompanying drawings of the specification. It is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present application.

[0033] Combine Figures 9 to 10As shown, further, the wall forming the groove 12 includes a third wall surface 121 and a fourth wall surface 122. Along the axial direction of the valve device 100, the third wall surface 121 is located on the upper wall surface of the groove 12. The third wall surface 121 is closer to the second wall surface 112 relative to the fourth wall surface 122. The fourth wall surface 122 is located radially outside the abutting portion 221. A part of the abutting portion 221 abuts against the third wall surface 121, and another part of the abutting portion 221 abuts against the fourth wall surface 122. Specifically, at least part of the abutting portion 221 is located within the groove 12. The extending portion 222 that is an integral structure with the abutting portion 221 is at least partially located within the embedding cavity 11. The bending portion 223 that is an integral structure with the extending portion 222 is at least partially within the embedding cavity 11. Since the abutting portion 221, the extending portion 222, and the bending portion 223 are of an integral structure, and the bending portion 223 extends inward or outward into the embedding cavity 11, the bonding strength between the connecting component 20 and the nut component 10 can be well improved.

[0034] Combine Figures 3 to 10 As shown, along the axial direction of the valve device 100, the connecting seat 21 extends from the abutting portion 221 in a direction away from the nut component 10; the valve device 100 further includes a valve seat component 30. The valve seat component 30 is located on the outer periphery of at least part of the connecting seat 21, and the valve seat component 30 is fixedly connected or limitedly connected to the connecting seat 21.

[0035] More specifically, the connecting seat 21 includes a first part 211 and a second part 212. Along the axial direction of the valve device 100, the second part 212 extends from the first part 211 in a direction away from the embedding member 22. The valve seat component 30 is located on the outer periphery of the first part 211 or the valve seat component 30 is located on the outer periphery of the second part 212; along the radial direction of the valve device 100, the size of the first part 211 is larger than the size of the second part 212. It should be noted that this size can be the diameter or the width. The valve device 100 further includes a valve body (not shown in the figure). Please refer specifically to Figure 11 , in some embodiments, the valve seat component 30 is located on the outer periphery of the first part 211. In this embodiment, the valve seat component 30 surrounds to the radial outside of the first part 211, and the valve seat component 30 is fixedly connected or limitedly connected to the valve body.

[0036] Please refer to Figure 3 and Figure 4 , in some embodiments, the valve seat component 30 is located on the outer periphery of the second part 212. The radially inner side of the valve seat component 30 is fixedly connected or limitedly connected to the second part 212, and the radially outer side of the valve seat component 30 is fixedly connected or limitedly connected to the valve body. Specifically, since the valve seat component 30 surrounds the outer periphery of the second part 212, the valve seat component 30 does not cover the first part 211. In this embodiment, the diameter of the valve seat component 30 is greater than Figure 11In the illustrated embodiment, the second part 212 is arranged such that an assembly part (not shown in the figure) can be reserved at a position. The assembly part is a hole structure or a groove structure, and the assembly part protrudes from or is recessed in the top wall surface of the second part 212. The assembly part and the second part 212 are of an integral structure or a split structure. In this embodiment, the number of assembly parts is at least one. When the number of assembly parts is multiple, the multiple assembly parts can better cooperate with an external tooling fixture, and thus the connecting seat 21 can be screwed into the valve body.

[0037] Please refer to Figures 3 to 5 and Figure 11 , further, the connecting seat 21 has a first accommodation cavity 213 and a second accommodation cavity 214. The first accommodation cavity 213 communicates with the second accommodation cavity 214, and the second accommodation cavity 214 is located above the first accommodation cavity 213. The valve device 100 further includes a first valve core member 50, and at least a part of the first valve core member 50 is located in the first accommodation cavity 213. Along the radial direction of the valve device 100, the size of the first accommodation cavity 213 is larger than that of the second accommodation cavity 214. The part of the wall forming the first accommodation cavity 213 in contact with the first valve core member 50 is defined as a stop wall surface 2131, and the stop wall surface 2131 is made of metal, which can improve the wear condition of the first valve core member 50. In this embodiment, this size is a diameter or a width. Taking the orientations in Figure 3 , Figure 4 and Figure 11 as a reference, it should be noted that when the first valve core member 50 moves upward to abut against the stop wall surface 2131, the first valve core member 50 stops moving upward at this time. In this embodiment, the valve device 100 further includes a valve port seat 40. The valve port seat 40 is located at the bottom of the first valve core member 50. The valve port seat 40 has a first through hole 41. The first valve core member 50 can contact or separate from the valve port seat 40. Along the axial direction of the valve device 100, when the first valve core member 50 contacts the valve port seat 40, the first valve core member 50 can block the first through hole 41; when the first valve core member 50 separates from the valve port seat 40, the first valve core member 50 can open the first through hole 41.

[0038] Please refer to Figures 3 to 5 and Figure 11 , the valve device 100 further includes a seal 15. The seal 15 is located on the side of the second part 212 away from the first part 211. A part of the seal 15 abuts against the first valve core member 50, and another part of the seal 15 abuts against the valve seat member 30. Specifically, the seal 15 is located on the side of the second part 212 away from the first part 211. Taking Figure 3 , Figure 4 and Figure 9Taking the orientation in [[]] as a reference, the seal 15 is located at the bottom of the second part 212. It should be noted that the first spool member 50 can move up and down. When the first spool member 50 moves downward to contact the valve port seat 40, the first spool member 50 can block the first through hole 41; when the first spool member 50 moves upward to separate from the valve port seat 40, the first spool member 50 can open the first through hole 41. Since the seal 15 is located at the bottom of the second part 212 and at the bottom position of the outer peripheral wall of the first spool member 50, along the axial direction of the valve device 100, the height of the outer peripheral wall of the first spool member 50 exposed outside the seal 15 can be reduced, which can effectively reduce the entry of impurities.

[0039] Combined Figure 3 with Figure 5 as shown, the valve device 100 further includes an elastic member 16; defining the contact part of the wall forming the second accommodation cavity 214 with the elastic member 16 as the abutting wall surface 2141, the abutting wall surface 2141 is made of metal; at least part of the elastic member 16 is located in the second accommodation cavity 214, one part of the elastic member 16 abuts against the abutting wall surface 2141, and the other part of the elastic member 16 abuts against the first spool member 50. The elastic member 16 in the present application can be but is not limited to a spring, an elastic material, or a structure similar to the function of a spring. The elastic member 16 in this embodiment is preferably spring steel, and the spring steel has high hardness and is not easy to wear.

[0040] It should be noted that since the elastic member 16 will rotate to a certain extent during the operation of the valve device 100, if the part of the connecting seat 21 for contacting the elastic member 16 is made of plastic material, the elastic member 16 will wear the connecting seat 21 during the relative rotation with the connecting seat 21, resulting in the generation of plastic debris. On the one hand, the plastic debris is inconvenient to clean and will affect the cleanliness of the valve device 100 product; on the other hand, if the plastic debris accumulates for a long time, it may jam the elastic member 16, increasing the risk of the elastic member 16 being blocked, and in severe cases, it may cause the product to fail to operate. In this embodiment, the nut member 10 is made of plastic material, and the connecting seat 21 is integrally made of metal material.

[0041] The valve device 100 further includes a second spool member 60. The first spool member 50 has an inner cavity 51 and a second through hole 52. At least part of the second spool member 60 is located in the inner cavity 51. The second spool member 60 can contact and separate from the wall forming the inner cavity 51. Along the axial direction of the valve device 100, when the second spool member 60 contacts the wall forming the inner cavity 51, the second spool member 60 can block the second through hole 52; when the second spool member 60 separates from the wall forming the inner cavity 51, the second spool member 60 can open the second through hole 52.

[0042] The valve device 100 further includes a driving assembly 70 and a valve stem 17. One end of the valve stem 17 is in threaded cooperation with the nut tube 14, and the other end of the valve stem 17 is in driving connection with the second valve core member 60. The driving assembly 70 enables the valve stem 17 to achieve axial movement during rotation.

[0043] It should be noted that the nut tube 14 and the valve stem 17 are coaxially arranged. In this way, in order to enable the valve stem 17 to move up and down along the axis of the electric valve relative to the nut tube 14, since the elastic member 16 is between the abutting wall surface 2141 and the first valve core member 50 and always remains in a compressed state, the elastic member 16 can always elastically push the first valve core member 50.

[0044] The valve device 100 further includes a valve sleeve 18. The valve sleeve 18 is located at one end of the first valve core member 50 away from the valve port seat 40. The second valve core member 60 includes a sliding portion 61 and an avoidance portion 62. There is a gap between the avoidance portion 62 and the wall forming the inner cavity 51. Along the axis of the valve device 100, the avoidance portion 62 extends from the sliding portion 61 towards the spring member. Along the radial direction of the valve device 100, the diameter of the sliding portion 61 is larger than the diameter of the avoidance portion 62. At least part of the valve sleeve 18 is located in the gap.

[0045] The driving assembly 70 includes a stator component (not shown in the figure) and a rotor component 71. The stator component is sleeved on the outer periphery of the rotor component 71. The stator component is in driving connection with the rotor component 71 and can drive the valve stem 17 to move along the axial direction of the valve device 100. Specifically, in this embodiment, a predetermined current can be applied to the stator component to generate an excitation magnetic field. The rotor component 71 rotates in the excitation magnetic field generated by the stator component, and the valve stem 17 converts the rotational movement into an axial movement as the rotor component 71 rotates, enabling the valve stem 17 to achieve axial movement during rotation.

[0046] It should be noted that in this embodiment, the axis of the valve device 100 is parallel to the extension direction of the rotation axis of the rotor component 71, and the radial direction of the valve device 100 is perpendicular to the extension direction of the rotation axis of the rotor component 71.

[0047] The rotor component 71 includes a magnet 711. The drive assembly 70 further includes a fastener 72 which can drive the valve stem 17 to rotate when rotating. Specifically, the stator component generates an excitation magnetic field by passing a predetermined current. The magnet 711 structure rotates in the excitation magnetic field generated by the stator component. When the magnet 711 structure rotates, it drives the valve stem 17 to rotate through the fastener 72. During the rotation of the valve stem 17, the valve core is driven to move up and down along the axial direction of the valve device 100 through a threaded sleeve. It should be noted that when the stator component generates an excitation magnetic field by passing a predetermined current, the magnet 711 structure rotates in the excitation magnetic field generated by the stator component, and during the rotation of the valve stem 17, the valve core is driven to move up and down along the axial direction of the valve device 100 through a threaded sleeve.

[0048] Please refer specifically to Figure 4 and Figure 7 , the valve device 100 further includes a stopper 721 and a fitting 141. The fitting 141 is located on the outer periphery of the nut tube 14. There is a gap between the nut tube 14 and the fastener 72. At least part of the fitting 141 is located in the gap. Along the axial direction of the valve device 100, the stopper 721 extends from the fastener 72 towards the nut tube 14. It should be noted that the stator component can drive the magnet 711 structure to rotate so as to drive the valve stem 17 to move downward. At this time, the state of the magnet 711 structure is rotating and moving downward. When the magnet 711 structure rotates until the stopper 721 contacts the fitting 141, the valve stem 17 stops moving downward. In this embodiment, the first valve core member 50 and the second valve core member 60 are used to achieve the sealing effect and can accurately control the flow rate of the small throttle section. Taking Figure 3 , Figure 4 and Figure 9As a reference, it should be noted that the stator component generates an excitation magnetic field by passing a predetermined current, and the magnet 711 structure rotates in the excitation magnetic field generated by the stator component. When the stator component drives the magnet 711 structure to rotate, thereby driving the valve stem 17 to move upward, the second valve core member 60 opens the second through hole 52. In addition, since one end of the valve stem 17 is in transmission connection with the second valve core member 60, the valve stem 17 can drive the second valve core member 60 to move upward. When the second valve core member 60 moves upward until the upper end surface of the sliding portion 61 abuts against the valve sleeve 18, the second valve core member 60 continues to move upward. The second valve core member 60 drives the first valve core member 50 to move upward by contacting the valve sleeve 18. At this time, the first valve core seat can open the first through hole 41, which can further improve the precise control of the flow rate. The second valve core member 60 drives the first valve core member 50 to move upward by contacting the valve sleeve 18. When the first valve core member 50 or the valve sleeve 18 contacts the stop wall 2131, the first valve core member 50 stops moving upward. In addition, in other embodiments, if the spring guide rail and the slip ring are used to achieve the stop effect, this structure has the risk of the slip ring coming out of the spring guide rail, which may affect the performance of the valve device 100.

[0049] It can be understood that when the stator component rotates through the driving magnet 711 structure to drive the valve stem 17 to move downward, the valve stem 17 will drive the second valve core member 60 to move downward. Since one end of the elastic member 16 abuts against the first valve core member 50, the elastic member 16 will elastically push the first valve core member 50, so that the first valve core member 50 can move downward together with the second valve core member 60. When the first valve core member 50 moves downward to contact the valve seat 40, the first valve core member 50 will block the first through hole 41. It should be known that when the first valve core member 50 blocks the first through hole 41, the second valve core member 60 and the wall forming the inner cavity 51 are still in a separated state, and then the second valve core member 60 continues to move downward under the drive of the valve stem 17 until the second valve core member 60 abuts against the wall forming the inner cavity 51, and at this time, the second valve core member 60 blocks the second through hole 52.

[0050] The valve seat component 30 includes an inlet portion 31 and an outlet portion 32, and the first valve core member 50 has a communication portion, which is communicated with the inlet portion 31. When the first valve core member 50 opens the first through hole 41, the inlet portion 31 can be communicated with the outlet portion 32 through the communication portion; when the second valve core member 60 opens the second through hole 52, the inlet portion 31 can be directly communicated with the outlet portion 32. It can be understood that in other embodiments, the inlet portion 31 can also be used as an outlet of the refrigerant, and the outlet portion 32 can also be used as an inlet of the refrigerant.

[0051] Please refer to Figure 4 and Figure 7, a first valve core member 50 is provided with balance holes 53, and the number of balance holes 53 is at least one. In this embodiment, the number is three, and the three balance holes 53 are respectively communicated with the opening part and the inner cavity 51. This can connect the external air with the air in the inner cavity 51, balance the air pressure between the external air and the inner cavity 51, so that the first valve core member 50 and the second valve core member 60 can be lifted relatively easily, thereby enabling the first valve core member 50 to open the first through hole 41 more smoothly and the second valve core member 60 to open the second through hole 52 more smoothly.

[0052] Please refer specifically to Figure 11 and Figure 12 , the valve device 100 further includes a sealing ring 80. The second part 212 has a limiting groove, and at least part of the sealing ring 80 is located in the limiting groove. The sealing ring 80 is located at the upper end of the sealing member 15. One part of the sealing ring 80 abuts against the second part 212, and the other part of the sealing ring 80 abuts against the inner wall of the valve seat member 30. When the refrigerant enters the inner cavity 51 from the balance hole 53, and then the refrigerant flows to the sealing member 15 through the gap between the first valve core member 50 and the wall forming the first accommodation cavity 213. The sealing ring 80 is located at the upper end of the sealing member 15, which can block the refrigerant and effectively reduce the leakage amount of the refrigerant, and has a good sealing effect.

[0053] Please refer to Figures 3 to 5 and Figure 11 , the valve device 100 further includes a sleeve 19. The sleeve 19 surrounds at least part of the outer periphery of the connecting seat 21, and the sleeve 19 is fixedly connected or limit-connected to the outer periphery of the connecting seat 21. In this embodiment, the sleeve 19 is fixedly connected to the connecting seat 21 by welding.

[0054] It should be noted that: the above embodiments are only used to illustrate the present application and do not limit the technical solutions described in the present application. Although this specification has described the present application in detail with reference to the above embodiments, those of ordinary skill in the art should understand that those skilled in the art can still modify the application or make equivalent substitutions. All technical solutions and their improvements that do not depart from the spirit and scope of the present application shall be covered within the scope of the claims of the present application.

Claims

1. A valve device, comprising a nut member (10) and a connecting member (20), One of the nut member (10) and the connecting member (20) has an embedding cavity (11); The other of the nut member (10) and the connecting member (20) includes a connecting seat (21) and an embedding member (22), the embedding member (22) and the connecting seat (21) are of an integral structure, and at least part of the embedding member (22) is located in the embedding cavity (11); The nut member (10) or the connecting member (20) is injection-molded with the embedding member (22) as an insert, and the nut member (10) or the connecting member (20) is injection-fixed to the embedding member (22).

2. The valve device according to claim 1, characterized in that, The nut member (10) has the embedding cavity (11); The connecting member (20) includes the connecting seat (21) and the embedding member (22); the nut member (10) is injection-molded with the embedding member (22) as an insert, and the nut member (10) is injection-fixed to the embedding member (22).

3. The valve device according to claim 2, characterized in that, The nut member (10) has a groove (12), and the groove (12) communicates with the embedding cavity (11); The embedding member (22) includes an abutting portion (221) and an extending portion (222), at least part of the abutting portion (221) is located in the groove (12), along the axial direction of the valve device, the extending portion (222) extends from the abutting portion (221) towards the direction of the embedding cavity (11), and at least part of the extending portion (222) is located in the embedding cavity (11).

4. The valve device according to claim 3, characterized in that, The wall forming the embedding cavity (11) includes a first wall surface (111) and a second wall surface (112), and the first wall surface (111) is farther from the groove (12) than the second wall surface (112); The embedding member (22) further includes a bending portion (223), along the radial direction of the valve device, the bending portion (223) extends inwards or outwards from the extending portion (222), and at least part of the bending portion (223) is located in the groove (12); along the axial direction of the valve device, one end of the bending portion (223) abuts against the first wall surface (111), and the other end of the bending portion (223) abuts against the second wall surface (112).

5. The valve device according to claim 3, characterized in that, The embedding member (22) further includes at least one convex block (224), the convex block (224) is located on the outer periphery of the abutting portion (221), and the convex block (224) is of a semi-cylindrical structure, a cylindrical structure or a cuboid structure.

6. The valve device according to claim 4, characterized in that, The wall forming the groove (12) includes a third wall surface (121) and a fourth wall surface (122), the third wall surface (121) is closer to the second wall surface (112) than the fourth wall surface (122), the fourth wall surface (122) is located radially outside the abutting portion (221), a part of the abutting portion (221) abuts against the third wall surface (121), and another part of the abutting portion (221) abuts against the fourth wall surface (122).

7. The valve device according to any one of claims 3 to 6, characterized in that, Axially along the valve device, the connection seat (21) extends from the abutting portion (221) in a direction away from the nut member (10). The valve device further includes a valve seat member (30), and the valve seat member (30) is fixedly connected or limitedly connected to the connection seat (21).

8. The valve device according to claim 7, characterized in that, The connection seat (21) includes a first part (211) and a second part (212). Axially along the valve device, the second part (212) extends from the first part (211) in a direction away from the insert (22), and the valve seat member (30) is located on the outer periphery of the first part (211) and / or the valve seat member (30) is located on the outer periphery of the second part (212).

9. The valve device according to claim 8, characterized in that, The connection seat (21) has a first accommodation cavity (213) and a second accommodation cavity (214). The valve device further includes a first valve core member (50), and at least a part of the first valve core member (50) is located in the first accommodation cavity (213). Radially along the valve device, the size of the first accommodation cavity (213) is larger than the size of the second accommodation cavity (214). Define the part of the wall forming the first accommodation cavity (213) in contact with the first valve core member (50) as the stop wall surface (2131), and the stop wall surface (2131) is made of metal material.

10. The valve device according to claim 9, characterized in that, The valve device further includes an elastic member (16). Define the part of the wall forming the second accommodation cavity (214) in contact with the elastic member (16) as the abutting wall surface (2141), and the abutting wall surface (2141) is made of metal material. At least a part of the elastic member (16) is located in the second accommodation cavity (214). One part of the elastic member (16) abuts against the abutting wall surface (2141), and the other part of the elastic member (16) abuts against the first valve core member (50).

11. The valve device according to claim 9, characterized in that, The valve device further includes a seal (15). The seal (15) is located on the side of the second part (212) away from the first part (211). One part of the seal (15) abuts against the first valve core member (50), and the other part of the seal (15) abuts against the valve seat member (30).

12. The valve device according to any one of claims 1 to 6 and 8 to 11, characterized in that, The valve device further includes a sleeve (19). The sleeve (19) surrounds at least a part of the outer periphery of the connection seat (21), and the sleeve (19) is fixedly connected or limitedly connected to the outer periphery of the connection seat (21).

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