A new forming structure of electronic expansion valve integrated coil

Abstract

The utility model relates to a new type forming structure of electronic expansion valve integrated coil, including coil body, cable and wire sheath, the cable includes the outer protective layer and inside wire core, the wire sheath installs in the end of cable, the coil body is connected with cable through injection moulding mode, and injection moulding site forms injection body, one end of wire sheath is in injection body, and the other end extends to the outside of injection body, and wire sheath is used for making cable and injection body isolated each other, to avoid the material direct action on the outer layer of cable in the injection process, prevents the injection pressure transmission to the wire core inside cable, reduces the risk of wire core pressure deformation or damage, the utility model discloses wire sheath between injection body and cable is arranged, makes injection body in the process of injection moulding not direct contact cable, can effectively isolate injection pressure, prevents the wire core inside cable pressure deformation or damage, to improve the manufacturing reliability and service life of electronic expansion valve integrated coil.

Description

Technical Field

[0001] This application relates to the field of electronic expansion valve technology, and in particular to a novel molded structure for an integrated coil of an electronic expansion valve. Background Technology

[0002] Electronic expansion valves are a common precision control component in air conditioning systems, used to regulate refrigerant flow for precise system temperature control. One of the core components of an electronic expansion valve is an integrated coil. This coil, formed by winding wires to create an electromagnetic coil, is installed inside or above the valve body to drive the valve core, thus opening and closing the valve. The coil typically needs to be connected to an external control system cable to transmit electrical signals for precise control; therefore, the coil's compact structure and reliable electrical connection are essential.

[0003] However, existing electronic expansion valve integrated coils have certain technical defects in their manufacturing process. Typically, the cable is directly connected to the coil body through injection molding to achieve fixation and sealing. However, during the injection molding process, the pressure of the molten plastic or the pressure of the injection mold after being subjected to force can easily be transmitted to the wire core, causing the cable to deform or be damaged under pressure, thereby affecting the service life and electrical performance of the coil. Utility Model Content

[0004] To address the problem mentioned in the background art that the cable is easily damaged by excessive pressure during the manufacturing of the integrated coil of the electronic expansion valve, this application provides a novel molding structure for the integrated coil of the electronic expansion valve.

[0005] The novel molding structure of the integrated coil for an electronic expansion valve provided in this application adopts the following technical solution: A novel molded structure for an integrated coil of an electronic expansion valve includes a coil body, a cable, and a wire sheath. The cable includes an outer protective layer and an inner wire core, and the wire sheath is installed at the end of the cable. The coil body and the cable are connected by injection molding, and the injection molding part forms an injection molded body; One end of the wire sheath is placed inside the injection molding body, and the other end extends outward from the injection molding body. The wire sheath is used to isolate the cable from the injection molding body, thereby preventing the material from directly acting on the outer layer of the cable during the injection molding process, preventing the injection molding pressure from being transmitted to the wire core inside the cable, and reducing the risk of the wire core being deformed or damaged by pressure.

[0006] By using the above technical solution, a wire sheath is set between the injection molded body and the cable, so that the injection molded body will not directly contact the cable during the injection molding process. This can effectively isolate the injection pressure and prevent the internal wire core of the cable from being deformed or damaged by pressure, thereby improving the manufacturing reliability and service life of the integrated coil of the electronic expansion valve.

[0007] Optionally, one end of the sheath extends to the outside of the injection molded body, and the outer wall of the extended portion is provided with an outwardly protruding ring.

[0008] The above technical solution utilizes the convex ring structure to precisely position the ends of the cable and sheath during injection molding, which helps ensure the accuracy of the injection molding position.

[0009] Optionally, a buckle is installed at the end of the coil body, and the buckle and the cable are located on the same side or opposite side of the coil body.

[0010] Through the above technical solution, the buckle in the electronic expansion valve is mainly used to limit the displacement of the rotor during rotation or movement, so as to ensure that it works stably within the predetermined position.

[0011] Optionally, the buckle has an L-shaped structure, and a positioning hole is provided on the surface of the buckle. During the injection molding process, the injection molded body extends into the positioning hole.

[0012] The above technical solution uses an L-shaped buckle with a positioning hole, which allows the injection molded body to extend into the positioning hole during molding. This ensures a stable connection between the injection molded body and the buckle, achieving synchronous fixing of the buckle and avoiding the need for additional buckle fixing processes, thus improving assembly efficiency.

[0013] Optionally, the buckle is installed in the mounting groove formed on the outer wall of the coil body, and the end of the coil body has a stepped portion that protrudes axially, with the inner wall of the buckle abutting against the end face of the stepped portion.

[0014] The above technical solution mainly utilizes the mounting groove and the stepped part to achieve initial positioning of the buckle. The buckle is then quickly inserted into the mounting groove and fixed by the injection molding process.

[0015] Optionally, the buckle is integrally formed with the injection molded body, and the outer wall of the coil body is formed with an installation groove.

[0016] Unlike the method of setting buckles separately, the above technical solution adopts an integrated molding method of buckles and injection molding body, which can further reduce the number of parts, simplify the assembly process, and at the same time have the characteristics of structural stability.

[0017] Optionally, the cross-section of the cable is circular.

[0018] Optionally, the cross-section of the cable is a long strip structure.

[0019] By adopting the above technical solutions, different cable types and structures can be selected according to actual needs, thus expanding their application range.

[0020] Optionally, the outer wall of the coil body extends radially outward to form a protrusion, and the outer wall of the protrusion is formed with a plurality of spaced waterproof ribs.

[0021] By adopting the above technical solution, the protrusions and waterproof ribs are designed to enable the injection molded body to form a reliable connection structure with the coil body after molding, and to have good sealing performance.

[0022] In summary, this application includes at least one of the following beneficial technical effects: This invention incorporates a wire sheath between the injection molded body and the cable, preventing the injection molded body from directly contacting the cable during the injection molding process. This effectively isolates the injection pressure, preventing the internal wire core of the cable from being deformed or damaged by pressure, thereby improving the manufacturing reliability and service life of the integrated coil of the electronic expansion valve. Attached Figure Description

[0023] Figure 1 This is a perspective view of Embodiment 1 of this utility model; Figure 2 This is a cross-sectional view of Embodiment 1 of this utility model; Figure 3 This is an exploded view of the coil body and the snap-fit ​​structure of Embodiment 1 of this utility model; Figure 4 This is a perspective view of Embodiment 2 of this utility model; Figure 5 This is a structural diagram of Embodiment 3 of this utility model; Figure 6 This is a cross-sectional view of Embodiment 3 of this utility model; Figure 7 This is a structural diagram of Embodiment 4 of this utility model.

[0024] Explanation of reference numerals in the attached figures: 1. Cable; 101. Outer protective layer; 102. Wire core; 2. Wire sheath; 201. Raised ring; 4. Injection molded body; 5. Circuit board; 6. Clip; 601. Positioning hole; 7. Coil body; 701. Stepped part; 702. Mounting groove; 703. Raised part; 704. Waterproof rib. Detailed Implementation

[0025] The present application will be further described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-3As shown, this embodiment discloses a novel molding structure for an integrated coil of an electronic expansion valve, including a coil body 7, a cable 1, and a sheath 2. The cable 1 includes an outer protective layer 101 and an inner core 102. The outer protective layer 101 is a rubber layer, which serves to insulate and protect the core 102. A pin is provided on the outside of the coil body 7, and a circuit board 5 is installed on the pin. The core 102 of the cable 1 is connected to the circuit board 5 by welding to realize the electrical signal transmission between the integrated coil and the external control system. The pin, circuit board 5, and internal structure on the coil body 7 are conventional settings in the prior art and will not be described in detail here.

[0028] The wire sheath 2 is installed at the end of the cable 1. Specifically, the wire sheath 2 is fitted onto the end of the cable 1 and can be fixedly connected to the cable 1 by means of adhesive bonding or other methods. The wire core 102 of the cable 1 extends to the outside of the wire sheath 2 and is soldered onto the circuit board 5. In this example, the cross-section of the cable 1 is circular, and correspondingly, the inner hole of the wire sheath 2 is circular.

[0029] The coil body 7 and the cable 1 are connected by injection molding, and the injection molding part forms an injection molded body 4.

[0030] One end of the wire sheath 2 is placed inside the injection molding body 4, and the other end extends outward from the injection molding body 4. The wire sheath 2 is used to isolate the cable 1 from the injection molding body 4, thereby preventing the material from directly acting on the outer layer of the cable 1 during the injection molding process, preventing the injection molding pressure from being transmitted to the wire core 102 inside the cable 1, and reducing the risk of the wire core 102 being deformed or damaged by pressure.

[0031] Specifically, one end of the wire sheath 2 extends to the outside of the injection molded body 4, and the outer wall of its extended portion is provided with an outwardly protruding convex ring 201. The convex ring 201 can not only strengthen the structural strength of the entire wire sheath 2 and prevent it from deforming during the injection molding process, but also serve as a positioning mark during the injection molding process to improve the accuracy and effect of the injection molding.

[0032] In this example, a buckle 6 is installed at the end of the coil body 7. The buckle 6 has an L-shaped structure and a positioning hole 601 on its surface. During injection molding, the injection molded body 4 extends into the positioning hole 601. The buckle 6 is installed in the mounting groove 702 formed on the outer wall of the coil body 7. The side of the mounting groove 702 is open to allow the injection molding material to enter the mounting groove 702. The end of the coil body 7 has an axially protruding stepped portion 701, and the inner wall of the buckle 6 abuts against the end face of the stepped portion 701. The buckle 6 is a separate component. During assembly, the buckle 6 is first inserted into the mounting groove 702 and abuts against the stepped portion 701 to achieve initial positioning of the buckle 6. Then, during injection molding, the injection molded body 4 can enter the mounting groove 702 and into the positioning hole 601 of the buckle 6, thereby fixing the buckle 6 to the coil body 7. The outer wall of the coil body 7 extends radially outward to form a protrusion 703, and the outer wall of the protrusion 703 is formed with a number of spaced waterproof ribs 704.

[0033] In this example, the buckle 6 and the cable 1 are located on opposite sides of the coil body 7, that is, the buckle 6 is set at one end of the cable body 7 and the cable 1 is set at the other end of the coil body 7.

[0034] Example 2

[0035] like Figure 4 As shown, the only difference between this embodiment and the above embodiment is that, in this example, the cross-section of the cable 1 is a long strip structure, and more specifically, the cable 1 is a flat structure, such as a flat elliptical structure, a rectangular rounded corner structure, a rectangular rounded corner structure, etc. Correspondingly, the inner hole shape of the cable sheath 2 is also a flat structure.

[0036] Example 3

[0037] like Figure 5-6 As shown, the difference between this embodiment and the second embodiment described above is that in this example, the buckle 6 and the injection-molded body 4 are integrally formed, meaning that a separate buckle 6 component is no longer provided. The buckle 6 is directly formed during the injection molding process, further simplifying the overall molding process of the integrated coil and improving production efficiency. Specifically, the outer wall of the coil body 7 is formed with an installation groove 702, which is a T-shaped groove structure. After the injection-molded body 4 is formed, it forms a T-shaped structure relative to the location of the installation groove 702, resulting in a better connection between the injection-molded body 4 and the coil body 7. Combined with the protrusion 703 and the waterproof rib 704, this further enhances the structural strength of the entire integrated coil. In this example, the buckle 6 and the cable 1 are in opposite directions on the coil body 7; that is, the buckle 6 is located at one end of the coil body 7, and the cable 1 is located at the other end.

[0038] Example 4

[0039] like Figure 7 As shown, the only difference between this embodiment and the above embodiment three is that in this example, the buckle 6 and the cable 1 are located at the same end of the coil body 7.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A novel molding structure for an integrated coil of an electronic expansion valve, characterized in that, It includes a coil body (7), a cable (1) and a wire sheath (2), the cable (1) including an outer protective layer (101) and an inner wire core (102), and the wire sheath (2) is installed at the end of the cable (1); The coil body (7) and the cable (1) are connected by injection molding, and the injection molding part forms an injection body (4). One end of the wire sheath (2) is placed inside the injection body (4), and the other end extends outward from the injection body (4). The wire sheath (2) is used to isolate the cable (1) from the injection body (4), thereby preventing the material from acting directly on the outer layer of the cable (1) during the injection process, preventing the injection pressure from being transmitted to the wire core (102) inside the cable (1), and reducing the risk of the wire core (102) being deformed or damaged by pressure.

2. The novel molding structure of the integrated coil of the electronic expansion valve according to claim 1, characterized in that, One end of the sheath (2) extends to the outside of the injection molded body (4), and the outer wall of its extended portion is provided with an outwardly protruding ring (201).

3. The novel molding structure of the integrated coil for an electronic expansion valve according to claim 1, characterized in that, The end of the coil body (7) is fitted with a buckle (6), and the buckle (6) and the cable (1) are located on the same side or opposite side of the coil body (7).

4. The novel molding structure of the integrated coil of the electronic expansion valve according to claim 3, characterized in that, The buckle (6) has an L-shaped structure and a positioning hole (601) is provided on the surface of the buckle (6). During the injection molding process, the injection body (4) extends into the positioning hole (601).

5. The novel molding structure of an integrated coil for an electronic expansion valve according to claim 4, characterized in that, The buckle (6) is installed in the mounting groove (702) formed on the outer wall of the coil body (7), and the end of the coil body (7) has a step portion (701) that protrudes along the axial direction, and the inner wall of the buckle (6) abuts against the end face of the step portion (701).

6. The novel molding structure of an integrated coil for an electronic expansion valve according to claim 3, characterized in that, The buckle (6) is integrally formed with the injection molded body (4), and the outer wall of the coil body (7) is formed with an installation groove (702).

7. The novel molding structure of an integrated coil for an electronic expansion valve according to claim 1, characterized in that, The cross-section of the cable (1) is circular.

8. The novel molding structure of an integrated coil for an electronic expansion valve according to claim 1, characterized in that, The cross-section of the cable (1) is a long strip structure.

9. The novel molding structure of an integrated coil for an electronic expansion valve according to claim 1, characterized in that, The outer wall of the coil body (7) extends radially outward to form a protrusion (703), and the outer wall of the protrusion (703) is formed with a number of spaced waterproof ribs (704).

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