Electronic expansion valve

Abstract

The invention provides an electronic expansion valve. The electronic expansion valve comprises a valve body, the sleeve is arranged on the valve body; the coil component comprises a packaging layer and a coil assembly, the packaging layer wraps the coil assembly, the coil component is provided with a penetrating hole, and the penetrating hole is used for allowing the sleeve to penetrate through; the sealing part is arranged between the coil component and the sleeve, the sealing part is arranged on the outer side of the sleeve in a sleeving mode, and the sealing part is used for sealing a gap between the coil component and the sleeve; one end of the fixing part is connected with the sealing part, and the other end of the fixing part is connected with the valve body. According to the scheme, the problem that the service life of a sealing ring is affected due to the fact that a plugging ring and a coil part are welded in the prior art can be solved.

Description

Technical Field

[0001] The present invention relates to the field of electronic expansion valves, and more particularly, to an electronic expansion valve. Background Art

[0002] Existing electronic expansion valves generally include a valve body assembly and a coil component. Among them, the valve body assembly includes a valve body and a sleeve disposed on the valve body. The coil component is provided with a through hole, and the sleeve is inserted through the through hole. After the sleeve is inserted through the through hole, there is a gap between the coil component and the sleeve. This gap causes water stains to enter the interior of the coil component along the outer wall of the sleeve. The components inside the coil component are in long-term contact with the water stains and will be corroded by the water stains, affecting their service life.

[0003] The electronic expansion valve further includes a sealing ring and a plugging ring. The sealing ring is sleeved on the sleeve and is located at the opening of the through hole. The sealing ring is used to seal the gap between the coil assembly and the sleeve. The plugging ring is sleeved on the sleeve. The plugging ring is located on the side of the sealing ring close to the valve body. The plugging ring is welded to the end face of the end of the coil component close to the valve body and limits the sealing ring. However, with the above solution, during the welding process of the plugging ring and the coil component, the microscopic structure of the sealing ring will be affected, thereby affecting the service life of the sealing ring and the sealing effect of the sealing ring. Summary of the Invention

[0004] The present invention provides an electronic expansion valve to solve the problem in the prior art that welding the plugging ring and the coil component affects the service life of the sealing ring.

[0005] The present invention provides an electronic expansion valve, which includes a valve body; a sleeve disposed on the valve body; a coil component including an encapsulation layer and a coil assembly, the encapsulation layer wrapping the coil assembly, the coil component having a through hole for the sleeve to pass through; a sealing portion disposed between the coil component and the sleeve, the sealing portion sleeved on the outer side of the sleeve, the sealing portion being used to seal the gap between the coil component and the sleeve; a fixing portion, one end of the fixing portion is connected to the sealing portion, and the other end is connected to the valve body.

[0006] Applying the technical solution of the present invention, the fixing part and the sealing part are detachably connected. With such a setting, it is convenient to fix the position of the sealing part and can avoid damaging the structure of the sealing part itself. In the traditional technical solution, usually a sealing ring is arranged at the installation opening of the housing of the coil assembly, and a sealing ring is arranged at the installation opening. A plugging ring is welded at the installation opening to limit the position of the sealing ring. However, the welding process usually damages the microscopic structure of the sealing ring and affects the sealing effect of the sealing ring. In the setting of this application, the sealing part is connected to the fixing part, and the fixing part is fixedly connected to the valve body to limit the position of the sealing part. With such a setting, it is possible to avoid performing the welding process near the sealing part, thereby avoiding the situation where the welding process damages the microscopic structure of the sealing part, improving the sealing effect of the sealing part and extending the service life of the sealing part.

[0007] Further, the sealing part and the fixing part are separately provided, and the sealing part and the fixing part are detachably connected.

[0008] Further, the sealing part and the fixing part are engaged in a clamping manner.

[0009] Further, a clamping groove is provided on the outer side wall of the sealing part, and the fixing part includes a clamping end, and the clamping end is engaged with the sealing part through the clamping groove.

[0010] Further, the fixing part includes a fixing ring, and the inner edge of the fixing ring forms a clamping end.

[0011] Further, the sealing part is made of an elastic material, the sealing part extends along the inner edge of the fixing ring to form an annular structure, and the clamping groove is provided on the outer side wall of the sealing part.

[0012] Further, the sealing part includes a sealing strip, and a clamping groove is provided on the side wall of the sealing strip facing the fixing ring.

[0013] Further, the total length of the sealing strip is less than or equal to the circumference of the inner side wall of the fixing ring.

[0014] Further, the sealing part includes a sealing piece, the sealing piece is made of an elastic material, the sealing piece is annularly arranged along the circumference of the fixing ring inside the fixing ring, along the axial direction of the fixing ring, both ends of the sealing piece are located on both sides of the fixing ring respectively, both ends of the sealing piece are bent towards the outer edge direction of the fixing ring respectively to form a first bending ring and a second bending ring respectively, and the space between the first bending ring and the second bending ring forms a clamping groove.

[0015] Further, the sealing part includes a sealing ring, a clamping groove is provided on the outer side wall of the sealing ring, and the circumference of the clamping groove is less than or equal to the circumference of the inner side wall of the fixing ring.

[0016] Further, the first end of the sealing part is inserted into the through hole, and the second end of the sealing part is located outside the through hole.

[0017] Further, the through hole includes a first hole section and a second hole section that are sequentially connected along the axial direction. The diameter of the second hole section is larger than that of the first hole section. One end of the second hole section away from the first hole section extends to the end face of the end of the encapsulation layer close to the valve body, and the first end of the sealing portion is inserted into the second hole section.

[0018] Further, the sealing portion has a sealing end face and a sealing side face. The sealing end face is in abutting cooperation with the coil assembly, and the sealing side face is in abutting cooperation with the side wall of the sleeve.

[0019] Further, the sealing portion is located outside the coil component. The sealing portion has a sealing end face and a sealing side face. The sealing end face is in abutting cooperation with the end face of the end of the encapsulation layer close to the valve body, and the sealing side face is in abutting cooperation with the side wall of the sleeve.

[0020] Further, the sealing end face is a plane or a curved surface.

[0021] Further, the clamping groove has a first side wall and a second side wall that are oppositely arranged in the direction from the sleeve to the valve body. The first side wall is flush with the end face of the end of the encapsulation layer close to the valve body. The fixing ring is a flat plate-like structure, and the fixing ring abuts against the end face of the end of the encapsulation layer close to the valve body.

[0022] Further, along the axial direction of the sealing portion, there is a spacing between the clamping groove and the end face of the end of the encapsulation layer close to the valve body. The fixing ring includes an abutting ring, a connecting ring, and a clamping ring that are sequentially connected from the outside to the inside. There is a spacing between the inner edge and the outer edge of the connecting ring in the axial direction. The abutting ring abuts against the end face of the end of the encapsulation layer close to the valve body, and the inner edge of the clamping ring forms a clamping end.

[0023] Further, the cross-sectional shape of the clamping groove is one of a rectangle, a trapezoid, or a U shape.

[0024] Further, the sealing portion and the fixing portion are of an integrally formed structure.

[0025] Further, a chamfer structure is provided at the connection position between the end face of the sealing portion and the outer side wall of the sealing portion.

[0026] Further, the electronic expansion valve further includes: a waterproof structure that covers the outside of the sleeve. The encapsulation layer is in sealing cooperation with the waterproof structure and the sealing portion respectively. The waterproof structure and the encapsulation layer are of an integrally formed or a separately formed structure. Description of the Drawings

[0027] The schematic drawings forming a part of this application are used to provide a further understanding of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0028] Figure 1Shows a schematic structural diagram of an electronic expansion valve provided according to Embodiment 1 of the present invention;

[0029] Figure 2 Shows a schematic structural diagram of a coil component provided according to Embodiment 1 of the present invention;

[0030] Figure 3 Shows a cross-sectional view of an electronic expansion valve from one perspective provided according to Embodiment 1 of the present invention;

[0031] Figure 4 Shows a cross-sectional view of an electronic expansion valve from another perspective provided according to Embodiment 1 of the present invention;

[0032] Figure 5 Shows Figure 4 A partial structural schematic diagram at position A in;

[0033] Figure 6 Shows a schematic structural diagram of one of the sealing parts provided according to Embodiment 1 of the present invention;

[0034] Figure 7 Shows Figure 6 The front view of the sealing part in;

[0035] Figure 8 Shows Figure 6 The cross-sectional view of the sealing part in;

[0036] Figure 9 Shows a schematic structural diagram of another sealing part provided according to Embodiment 1 of the present invention;

[0037] Figure 10 Shows Figure 9 The front view of the sealing part in;

[0038] Figure 11 Shows Figure 9 The cross-sectional view of the sealing part in;

[0039] Figure 12 Shows a schematic structural diagram of another sealing part provided according to Embodiment 1 of the present invention;

[0040] Figure 13 Shows Figure 12 The front view of the sealing part in;

[0041] Figure 14 Shows Figure 12 The cross-sectional view of the sealing part in;

[0042] Figure 15 Shows a schematic structural diagram of another sealing part provided according to Embodiment 1 of the present invention;

[0043] Figure 16 ShowsFigure 15 Front view of the sealing part in

[0044] Figure 17 shows Figure 15 Cross-sectional view of the sealing part in

[0045] Figure 18 Structural schematic diagram of another sealing part provided according to Embodiment 1 of the present invention;

[0046] Figure 19 shows Figure 18 Front view of the sealing part in

[0047] Figure 20 shows Figure 18 Cross-sectional view of the sealing part in

[0048] Figure 21 Front view of the sealing strip provided according to Embodiment 1 of the present invention;

[0049] Figure 22 Side view of the sealing strip provided according to Embodiment 1 of the present invention;

[0050] Figure 23 Structural schematic diagram of the sealing piece provided according to Embodiment 1 of the present invention;

[0051] Figure 24 Cross-sectional view of the electronic expansion valve provided according to Embodiment 2 of the present invention;

[0052] Figure 25 shows Figure 24 Partial structural schematic diagram at position B in

[0053] Among them, the above-mentioned drawings include the following reference numerals:

[0054] 10. Valve body;

[0055] 20. Sleeve;

[0056] 30. Encapsulation layer;

[0057] 40. Coil assembly;

[0058] 401. Penetration hole;

[0059] 4011. First hole section; 4012. Second hole section;

[0060] 50. Sealing part; 501. Clamping groove; 502. Sealing end face; 503. Sealing side face;

[0061] 60. Fixing part;

[0062] 61. Fixing ring; 62. Fixing piece;

[0063] 611. Contact ring; 612. Connecting ring; 613. Clamping ring;

[0064] 70. Waterproof structure. Detailed implementation manner

[0065] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and in no way limits the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0066] As Figures 1 to 5 shown, the present invention provides an electronic expansion valve, which includes a valve body 10, a sleeve 20, a coil component, and a sealing portion 50. The sleeve 20 is disposed on the valve body 10. The coil component includes an encapsulation layer 30 and a coil assembly 40. The encapsulation layer 30 wraps the coil assembly 40. The coil component has a through hole 401 for the sleeve 20 to pass through. The sealing portion 50 is disposed between the coil component and the sleeve 20. The sealing portion 50 is sleeved on the outer side of the sleeve 20 and is used to seal the gap between the coil component and the sleeve 20. One end of the fixing portion 60 is connected to the sealing portion 50, and the other end is connected to the valve body 10. Among them, the coil assembly 40 includes paired claw poles, stator plates, windings, and a stator housing. The foregoing coil assembly 40 is injection-molded and encapsulated to form the encapsulation layer 30.

[0067] Applying the technical solution of the present invention, the fixing portion 60 is detachably connected to the sealing portion 50. With such a setting, it is possible to facilitate the fixing of the position of the sealing portion 50 and avoid damaging the structure of the sealing portion 50 itself. In the traditional technical solution, usually, a sealing ring is disposed at the installation opening of the housing of the coil assembly, and a sealing ring is welded at the installation opening to limit the position of the sealing ring. However, the welding process usually damages the microscopic structure of the sealing ring and affects the sealing effect of the sealing ring. In the setting of the present application, the sealing portion 50 is connected to the fixing portion 60, and the position of the sealing portion 50 is limited by the fixing portion 60 being fixedly connected to the valve body 10. With such a setting, it is possible to avoid performing a welding process near the sealing portion 50, thereby avoiding the situation where the welding process damages the microscopic structure of the sealing portion 50, improving the sealing effect of the sealing portion 50 and extending the service life of the sealing portion 50.

[0068] The present solution does not limit the specific connection manner between the sealing portion 50 and the fixing portion 60.

[0069] In some embodiments of this solution, the sealing part 50 and the fixing part 60 can be set as an integrally formed structure. Specifically, in this case, the fixing part 60 can be provided with a round hole structure, and the sealing part 50 is injection-molded or fused along the circumference of the round hole structure on the hole wall of the round hole structure.

[0070] In this embodiment, the sealing part 50 and the fixing part 60 are separately arranged, and the sealing part 50 and the fixing part 60 are detachably connected. This solution does not limit the specific connection method between the sealing part 50 and the fixing part 60. Among them, the connection can be carried out by means of fasteners, snap connection or plug connection.

[0071] In this embodiment, the sealing part 50 and the fixing part 60 are snap-fitted. With such a setting, the mutual connection of the two can be realized by using the structures of the sealing part 50 and the fixing part 60 itself, and it is not necessary to introduce other fasteners to connect and fix the two, reducing the number of parts of the electronic expansion valve in this solution. And the above setting facilitates the connection and fixing as well as disassembly between the sealing part 50 and the fixing part 60.

[0072] Furthermore, a snap groove 501 is provided on the outer side wall of the sealing part 50, and the fixing part 60 includes a snap end, and the snap end is snap-fitted with the sealing part 50 through the snap groove 501. Setting the snap groove 501 on the outer side wall of the sealing part 50 has a simple structure and is convenient for machining the snap groove 501.

[0073] This solution does not limit the specific number of the snap grooves 501, as long as the snap end and the snap groove 501 can be snap-fitted with each other. Among them, a plurality of snap grooves 501 can be arranged at intervals along the circumference of the sealing part 50. At this time, the snap end can be set in the form of a plurality of convex structures, and the convex structures are snap-fitted in the corresponding snap grooves 501.

[0074] In this embodiment, there is one snap groove 501, and the snap groove 501 is annularly arranged along the circumference of the sealing part 50 on the outer side wall of the sealing part 50, that is, the snap groove 501 is a closed annular structure.

[0075] Specifically, the fixing part 60 includes a fixing ring 61, and the inner edge of the fixing ring 61 forms the snap end. The above setting makes the entire inner edge of the fixing ring 61 located in the snap groove 501, improving the contact area between the fixing ring 61 and the snap groove 501, and further improving the connection stability between the sealing part 50 and the fixing part 60. And the above setting makes the fixing ring 61 able to support the entire circumference of the sealing part 50 along the circumference of the sealing part 50, ensuring the structural stability of the sealing part 50, reducing the deformation of the sealing part 50, and further improving the sealing effect of the sealing part 50.

[0076] Furthermore, the electronic expansion valve further includes a circumferential limiting structure. The circumferential limiting structure is arranged between the fixed ring 61 and the encapsulation layer 30. The circumferential limiting structure is used to limit the relative position of the fixed ring 61 and the encapsulation layer 30 in the circumferential direction. With such an arrangement, the stability of the fixed ring 61 can be improved, the rotation of the fixed ring 61 can be reduced, and the stability of the sealing portion 50 can be enhanced.

[0077] In some embodiments of this solution, the circumferential limiting structure includes a limiting post and a limiting hole that are mutually limiting and cooperating. Among them, the limiting post is arranged on the end face of the encapsulation layer 30 close to the valve body, and the limiting hole is arranged on the fixed ring 61.

[0078] In some other embodiments of this solution, the circumferential limiting structure includes a limiting post and a limiting groove that are mutually limiting and cooperating. The limiting groove is arranged on the end face of the encapsulation layer 30 close to the valve body, and the limiting post is arranged on the end face of the fixed ring 61 away from the fixing piece 62.

[0079] In this solution, the fixing portion 60 further includes a fixing piece 62. The extending direction of the fixing piece 62 is the same as the axial direction of the fixed ring 61. One end of the fixing piece 62 is arranged at the outer edge of the fixed ring 61, and the other end of the fixing piece 62 extends toward the side of the axial direction of the fixed ring 61 and is fixedly connected to the valve body 10.

[0080] This solution does not limit the specific connection manner between the fixing piece 62 and the valve body 10. Among them, the connection manners of the two include, but are not limited to, welding, clamping, or connection through fasteners.

[0081] In this embodiment, an installation hole is arranged at the end of the fixing piece 62 away from the fixed ring 61. The electronic expansion valve further includes a fastener. The fastener is arranged corresponding to the installation hole, and the valve body 10 and the fixing piece 62 are fixedly connected through the fastener.

[0082] Furthermore, the sealing portion 50 is made of an elastic material. The sealing portion 50 extends along the inner edge of the fixed ring 61 to form an annular structure. A clamping groove 501 is arranged on the outer side wall of the sealing portion 50. After the assembly of the electronic expansion valve is completed, other components squeeze the sealing portion 50. Due to the sealing portion 50 made of an elastic material, it has a certain deformation margin, which can ensure the tightness of the sealing portion 50 in contact with the sleeve and the coil assembly 40, and further improve the sealing effect of the sealing portion 50.

[0083] As Figures 5 to 23 shown, this solution does not limit the specific form of the sealing portion 50.

[0084] In some embodiments of this solution, the sealing portion 50 includes a sealing strip, and a clamping groove 501 is arranged on the side wall of the sealing strip facing the fixed ring 61.

[0085] When the sealing part 50 includes a sealing strip, the extending direction of the clamping groove 501 is the same as that of the sealing strip, and both ends in the length direction of the clamping groove 501 are open. Specifically, when assembling the sealing strip and the fixing part 60, the sealing strip is wound around the inner edge of the fixing ring 61 along the inner edge of the fixing ring 61, and the inner edge of the fixing ring 61 is embedded in the clamping groove 501 of the sealing strip. After assembly, there is a certain gap between the two ends of the sealing strip, leaving a deformation space for the deformation of the sealing strip. With such a setting, it is convenient to process the sealing part 50, and the cutting length of the sealing part 50 can be determined according to the diameter of the fixing ring 61, improving the adaptability of this solution.

[0086] Further, the total length of the sealing strip is less than or equal to the circumference of the inner side wall of the fixing ring 61. With the above setting, after the electronic expansion valve is assembled, each component can squeeze the sealing strip to shape the sealing strip. That is, when assembling the sealing strip and the fixing ring 61, the two free ends of the sealing strip do not need to be connected in a specific way, and only need to ensure that after the sealing strip is squeezed, the two free ends of the sealing strip abut against each other to form a closed ring structure.

[0087] The sealing part 50 may also include a plurality of sealing strips arranged in sequence end to end. At this time, it is only necessary to ensure that the plurality of sealing strips arranged in sequence end to end form a closed ring structure. The total length of the plurality of sealing strips is less than or equal to the circumference of the inner side wall of the fixing ring 61.

[0088] In some other embodiments of this solution, the sealing part 50 includes a sealing sheet. The sealing sheet is made of an elastic material and is annularly arranged along the circumference of the fixing ring 61 inside the fixing ring 61. Along the axial direction of the fixing ring 61, both ends of the sealing sheet are respectively located on both sides of the fixing ring 61, and both ends of the sealing sheet are bent towards the outer edge direction of the fixing ring 61 to respectively form a first bending ring and a second bending ring. The space between the first bending ring and the second bending ring forms the clamping groove 501. By setting the sealing part 50 in the form of a sealing sheet, the dimensions of the first bending ring and the second bending ring along the radial direction of the fixing ring can be changed according to the width of the sealing sheet, facilitating the adaptation of the sealing sheet to the fixing ring 61 with different specifications and dimensions. And in the form of a sealing sheet, its processing is simpler.

[0089] Specifically, when assembling the sealing sheet and the fixing ring 61, the sealing sheet is annularly arranged along the circumference of the fixing ring 61 inside the fixing ring 61, and the two ends of the sealing sheet are made to abut against each other; it is ensured that along the axial direction of the fixing ring 61, both ends of the sealing sheet are respectively located on both sides of the fixing ring 61, and both ends of the sealing sheet are bent towards the outer edge direction of the fixing ring 61 to respectively form a first bending ring and a second bending ring. The space between the first bending ring and the second bending ring forms the clamping groove 501. After that, the sealing sheet can be shaped.

[0090] The specific form of shaping the sealing piece in this solution is not limited, including but not limited to the forms of heat treatment and fixing with glue.

[0091] Similarly, when the sealing portion 50 includes a sealing piece, the total length of the sealing piece is less than or equal to the circumference of the inner side wall of the fixing ring 61.

[0092] The sealing portion 50 may also include a plurality of sealing pieces arranged in sequence end to end. At this time, the plurality of sealing pieces arranged in sequence end to end form a closed annular structure. It is only necessary that the total circumference of the plurality of sealing pieces arranged in sequence end to end is less than or equal to the circumference of the inner side wall of the fixing ring 61.

[0093] In some other embodiments of this solution, the sealing portion 50 includes a sealing ring, and a clamping groove 501 is provided on the outer side wall of the sealing ring. The circumference of the clamping groove 501 is less than or equal to the circumference of the inner side wall of the fixing ring 61.

[0094] This solution does not limit the specific position of the sealing portion 50.

[0095] As Figures 3 to 5 shown, in some embodiments of this solution, the first end of the sealing portion 50 is inserted into the through hole 401, and the second end of the sealing portion 50 is located outside the through hole 401.

[0096] Specifically, the through hole 401 includes a first hole section 4011 and a second hole section 4012 that are sequentially connected along the axial direction. The diameter of the second hole section 4012 is larger than that of the first hole section 4011. One end of the second hole section 4012 far from the first hole section 4011 extends to the end face of the end of the encapsulation layer 30 close to the valve body 10. The first end of the sealing portion 50 is inserted into the second hole section 4012. Specifically, the first hole section 4011 is provided on the coil assembly 40, and the second hole section 4012 is provided on the encapsulation layer 30. The first end of the sealing portion 50 abuts against the stator housing of the coil assembly 40. With such a setting, the stability of the sealing portion 50 can be improved, and the sealing effect of the sealing portion 50 can be improved.

[0097] As Figures 1 to 5 shown, specifically, the sealing portion 50 has a sealing end face 502 and a sealing side face 503. The sealing end face 502 abuts and cooperates with the coil assembly 40, and the sealing side face 503 abuts and cooperates with the side wall of the sleeve 20. With such a setting, the sealing portion 50 abuts against the coil assembly 40 and the sleeve 20 respectively, realizing the radial and axial sealing of the coil component respectively, and further improving the sealing performance of the sealing portion 50.

[0098] In this embodiment, the sealing side face 503 is an annular structure, which is coaxially arranged with the sleeve 20, and the sealing side face 503 is closely attached to the sleeve 20. With such a setting, the sealing effect between the sealing side face 503 and the sleeve 20 can be ensured.

[0099] This solution does not limit the specific form of the sealing end face 502. Among them, the sealing end face 502 can be set as a flat surface or an arc surface.

[0100] This solution does not limit the specific shape of the fixing ring 61.

[0101] In some embodiments of this solution, the clamping groove 501 has a first side wall and a second side wall that are oppositely arranged along the direction from the sleeve 20 to the valve body 10. The first side wall is flush with the end face of the encapsulation layer 30 near the valve body 10. The fixing ring 61 is a flat plate-like structure, and the fixing ring 61 abuts against the end face of the encapsulation layer 30 near the valve body 10.

[0102] Such as Figures 5 to 20 As shown, this solution does not limit the specific shape of the clamping groove 501.

[0103] In some embodiments of this solution, the cross-sectional shape of the clamping groove 501 is rectangular. With this setting, it is convenient to realize the processing and forming of the clamping groove 501.

[0104] In some other embodiments of this solution, the cross-sectional shape of the clamping groove 501 is trapezoidal, and along the axial direction of the sealing part 50, the clamping groove 501 has two oppositely arranged side walls. Along the direction from the center to the edge of the sealing part 50, the distance between the two side walls of the clamping groove 501 gradually increases. With this setting, it is convenient to realize the assembly of the sealing part 50 and the fixing ring 61.

[0105] In some other embodiments of this solution, the cross-sectional shape of the clamping groove 501 is U-shaped.

[0106] In this solution, the sealing part 50 can be set as a symmetric structure or an asymmetric structure. When the sealing part 50 is a symmetric structure, the structures of the two end faces of the sealing part 50 are the same. When the sealing part 50 is an asymmetric structure, the structures of the two end faces of the sealing part 50 are different.

[0107] In this embodiment, the sealing part 50 is a symmetric structure, that is, the structures of the two end faces of the sealing part 50 are the same. When assembling the sealing part 50 and the fixing ring 61, it is not necessary to distinguish the orientations of the two end faces of the sealing part 50, which ensures the convenience of assembling the sealing part 50 and the fixing ring 61, and can also ensure the convenience of processing the sealing part 50 itself.

[0108] Furthermore, a chamfer structure or a fillet structure is provided at the connection position between the end face of the sealing part 50 and the outer side wall of the sealing part 50. With this setting, the situation of tearing at the edge of the sealing part 50 is reduced, and the mechanical strength of the sealing part 50 is further improved.

[0109] Such asFigures 1 to 3 As shown, the electronic expansion valve further includes a waterproof structure 70, which is covered outside the sleeve 20, and the encapsulation layer 30 is sealed with the waterproof structure 70 and the sealing part 50. In this way, the waterproof structure 70, the coil component and the sealing part 50 cooperate to form a closed cavity, which can reduce or prevent the entry of external water vapor. At the same time, the above arrangement can prevent the generation of condensed water.

[0110] This solution does not limit the specific connection method between the waterproof structure 70 and the encapsulation layer 30.

[0111] In some embodiments of the present solution, the waterproof structure 70 and the encapsulation layer 30 are an integrally formed structure, that is, the waterproof structure 70 is formed by an injection molding process.

[0112] In some other embodiments of the present invention, the waterproof structure 70 and the encapsulation layer 30 are separate structures, and the waterproof structure 70 can be fixedly connected to the encapsulation layer 30 by fasteners or snap-on connection.

[0113] If Figure 24 and Figure 25 As shown, the second embodiment of this scheme provides an electronic expansion valve, which is different from the first embodiment in that:

[0114] The diameter of the perforated hole 401 is equal along the axial direction. The sealing part 50 is located outside the coil component. The sealing part 50 has a sealing end face 502 and a sealing side face 503. The sealing end face 502 abuts against the end face of the end of the encapsulation layer 30 close to the valve body 10, and the sealing side face 503 abuts against the side wall of the sleeve 20. This arrangement can facilitate the assembly of the sealing part 50.

[0115] Along the axial direction of the sealing portion 50, there is a gap between the clamping groove 501 and the end surface of the sealing layer 30 close to the valve body 10. The fixing ring 61 includes an abutting ring 611, a connecting ring 612 and a clamping ring 613 connected in sequence from the outside to the inside. The inner edge of the connecting ring 612 and the outer edge of the connecting ring 612 are spaced in the axial direction. The abutting ring 611 abuts against the end surface of the sealing layer 30 close to the valve body 10, and the inner edge of the clamping ring 613 forms a clamping end.

[0116] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "include" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or their combinations.

[0117] Unless otherwise specifically stated, the relative arrangements of components and steps, numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for the sake of convenience of description, the dimensions of the various parts shown in the drawings are not drawn in actual proportional relationships. Technologies, methods, and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the said technologies, methods, and devices should be regarded as part of the description. In all the examples shown and discussed here, any specific values should be construed as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters denote like items in the following drawings, and thus, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0118] In the description of the present invention, it should be understood that the orientation or positional relationships indicated by orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal", and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description. Without contrary statements, these orientation terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of the present invention; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0119] For the convenience of description, spatial relative terms such as "above...", "over...", "on the upper surface of...", "above-mentioned", etc. may be used here to describe the spatial positional relationships between a device or feature shown in the drawings and other devices or features. It should be understood that the spatial relative terms are intended to cover different orientations in use or operation in addition to the orientation described in the drawings for the device. For example, if the device in the drawing is inverted, the device described as "above other devices or structures" or "over other devices or structures" will then be positioned "below other devices or structures" or "under other devices or structures". Thus, the exemplary term "above..." can include both the orientations of "above..." and "below...". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and corresponding interpretations should be made for the spatial relative descriptions used here.

[0120] In addition, it should be noted that the use of terms such as "first", "second", etc. to limit components is only for the convenience of distinguishing the corresponding components. Without otherwise stating, the above terms have no special meanings. Therefore, they should not be construed as limiting the scope of protection of the present invention.

[0121] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. An electronic expansion valve, characterized in that: include: Valve body (10); A sleeve (20) is arranged on the valve body (10); A coil component, comprising an encapsulation layer (30) and a coil assembly (40), wherein the encapsulation layer (30) encapsulates the coil assembly (40), and the coil component has a penetration hole (401), wherein the penetration hole (401) is used for the sleeve (20) to penetrate; a sealing portion (50) disposed between the coil component and the sleeve (20), the sealing portion (50) being sleeved on the outside of the sleeve (20), and the sealing portion (50) being used to seal the gap between the coil component and the sleeve (20); A fixing part (60), one end of which is connected to the sealing part (50), and the other end of which is connected to the valve body (10).

2. The electronic expansion valve according to claim 1, characterized in that: The sealing portion (50) and the fixing portion (60) are arranged separately, and the sealing portion (50) and the fixing portion (60) are detachably connected.

3. The electronic expansion valve according to claim 2, characterized in that: The sealing portion (50) is snap-fitted with the fixing portion (60).

4. The electronic expansion valve according to claim 3, characterized in that: A snap-fit ​​groove (501) is provided on the outer side wall of the sealing portion (50), and the fixing portion (60) comprises a snap-fit ​​end, and the snap-fit ​​end is snap-fitted with the sealing portion (50) through the snap-fit ​​groove (501).

5. The electronic expansion valve according to claim 4, characterized in that: The fixing portion (60) comprises a fixing ring (61), and the inner edge of the fixing ring (61) forms the clamping end.

6. The electronic expansion valve according to claim 5, characterized in that: The sealing portion (50) is made of an elastic material, and the sealing portion (50) extends along the inner edge of the fixing ring (61) to form an annular structure, and the clamping groove (501) is arranged on the outer side wall of the sealing portion (50).

7. The electronic expansion valve according to claim 6, characterized in that: The sealing portion (50) comprises a sealing strip, and the clamping groove (501) is provided on the side wall of the sealing strip facing the fixing ring (61).

8. The electronic expansion valve according to claim 7, characterized in that: The total length of the sealing strip is less than or equal to the circumference of the inner wall of the fixing ring (61).

9. The electronic expansion valve according to claim 5, characterized in that: The sealing portion (50) comprises a sealing sheet, which is made of an elastic material and is arranged in a ring shape inside the fixing ring (61) along the circumference of the fixing ring (61). Along the axial direction of the fixing ring (61), two ends of the sealing sheet are respectively located on two sides of the fixing ring (61). The two ends of the sealing sheet are respectively bent toward the outer edge of the fixing ring (61) to form a first bending ring and a second bending ring, respectively. The space between the first bending ring and the second bending ring forms the snap-fit ​​groove (501).

10. The electronic expansion valve according to claim 5, characterized in that: The sealing portion (50) comprises a sealing ring, and the clamping groove (501) is provided on the outer side wall of the sealing ring. The circumference of the clamping groove (501) is less than or equal to the circumference of the inner side wall of the fixing ring (61).

11. The electronic expansion valve according to claim 1, characterized in that: The first end of the sealing portion (50) is inserted into the penetration hole (401), and the second end of the sealing portion (50) is located outside the penetration hole (401).

12. The electronic expansion valve according to claim 11, characterized in that: The penetration hole (401) comprises a first hole section (4011) and a second hole section (4012) which are connected in sequence along the axial direction, the diameter of the second hole section (4012) is larger than the diameter of the first hole section (4011), and the end of the second hole section (4012) away from the first hole section (4011) extends to the end surface of the sealing layer (30) close to the valve body (10), and the first end of the sealing portion (50) is penetrated in the second hole section (4012).

13. The electronic expansion valve according to claim 12, characterized in that: The sealing portion (50) has a sealing end surface (502) and a sealing side surface (503); the sealing end surface (502) is in abutment with the coil assembly (40), and the sealing side surface (503) is in abutment with the side wall of the sleeve (20).

14. The electronic expansion valve according to claim 1, characterized in that: The sealing portion (50) is located on the outside of the coil component, and the sealing portion (50) has a sealing end face (502) and a sealing side face (503). The sealing end face (502) abuts against the end face of the sealing layer (30) at one end close to the valve body (10), and the sealing side face (503) abuts against the side wall of the sleeve (20).

15. The electronic expansion valve according to claim 13 or 14, characterized in that: The sealing end surface (502) is a flat surface or a curved surface.

16. The electronic expansion valve according to claim 5, characterized in that: The snap-fit ​​groove (501) has a first side wall and a second side wall which are arranged opposite to each other along the direction from the sleeve (20) to the valve body (10), and the first side wall is flush with the end face of the sealing layer (30) close to the valve body (10). The fixing ring (61) is a planar plate-like structure, and the fixing ring (61) abuts against the end face of the sealing layer (30) close to the valve body (10).

17. The electronic expansion valve according to claim 5, characterized in that: Along the axial direction of the sealing portion (50), there is a spacing between the snap-fit ​​groove (501) and the end face of the sealing layer (30) close to the valve body (10), and the fixing ring (61) includes an abutment ring (611), a connecting ring (612) and a snap-fit ​​ring (613) which are sequentially connected from the outside to the inside, and the inner edge of the connecting ring (612) and the outer edge of the connecting ring (612) are spaced in the axial direction, the abutment ring (611) abuts against the end face of the sealing layer (30) close to the valve body (10), and the inner edge of the snap-fit ​​ring (613) forms the snap-fit ​​end.

18. The electronic expansion valve according to claim 4, characterized in that: The cross-sectional shape of the clamping groove (501) is one of a rectangle, a trapezoid or a U shape.

19. The electronic expansion valve according to claim 1, characterized in that: The sealing portion (50) and the fixing portion (60) are an integrally formed structure.

20. The electronic expansion valve according to claim 1, characterized in that: A chamfered structure is provided at a connection position between the end surface of the sealing portion (50) and the outer side wall of the sealing portion (50).

21. The electronic expansion valve according to claim 1, characterized in that: The electronic expansion valve further comprises: The waterproof structure (70) is covered outside the sleeve (20), and the sealing layer (30) is sealed with the waterproof structure (70) and the sealing portion (50) respectively. The waterproof structure (70) and the sealing layer (30) are integrally formed or separately formed structures.

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