Electronic expansion valve with coil seal

Abstract

The utility model discloses an electronic expansion valve of coil sealing structure, including coil body, valve body and sealing structure, coil body is equipped with assembly cavity, and the lower extreme of assembly cavity is equipped with double -step annular groove, and double -step annular groove includes upper step groove and lower step groove, the valve body is fixedly connected with the sleeve, and sealing structure includes sealing washer, sealing baffle and fixed frame, and sealing washer is clamped between upper step groove and sleeve, and sealing baffle includes upper ring body and lower ring body, and upper ring body is embedded in lower step groove, and fixed frame includes fixed ring and connecting lug, and fixed ring is fixed to the bottom surface of lower ring body, and connecting lug is fixed to the edge portion of fixed ring, and can detachable fixed to the outer wall of valve body, the utility model discloses an electronic expansion valve, and sealing washer and sealing baffle form the combination structure of inlaying, utilize fixed frame to make sealing structure and coil body fixed as integral type module, realized the reliable sealing between assembly cavity and sleeve, and provided independent airtight detection condition for the claw pole position chamber of coil body.

Description

Technical Field

[0001] This utility model relates to the field of automotive air conditioning system technology, specifically to an electronic expansion valve with a coil sealing structure. Background Technology

[0002] In the prior art, the electronic expansion valve for automotive air conditioning systems typically includes a coil body and a valve body. The bottom surface of the coil body has an upwardly extending assembly cavity, and the top surface of the valve body is coaxially fixed with a sleeve. The upper part of the sleeve is inserted into the assembly cavity. To achieve a seal between the assembly cavity and the sleeve, the conventional solution is to open an annular groove on the inner wall of the assembly cavity and embed a sealing ring in the annular groove. Radial sealing is achieved through the extrusion contact between the sealing ring and the outer wall of the sleeve.

[0003] 1. Because the sealing ring is directly embedded in the annular groove of the inner wall of the assembly cavity, it blocks the communication path between the assembly cavity and the claw pole cavity inside the coil body. When it is necessary to perform independent airtightness testing on the claw pole cavity, this structure cannot provide reliable isolation and sealing, which makes it impossible for the testing fixture to apply pressure effectively, and the airtightness test cannot be performed, affecting the product reliability verification.

[0004] 2. The sealing ring needs to be slowly inserted from the top of the sleeve during assembly, which makes it difficult to support quick insertion and removal operations. It is not suitable for the installation of quick-connect coil structures or for structural borrowing. Utility Model Content

[0005] In view of this, the present invention proposes an electronic expansion valve with a coil sealing structure. By adopting an inner nested combination structure formed by a sealing ring and a sealing retaining ring, and using a fixing frame to lock the sealing structure and the coil body into an integrated module, a reliable seal between the assembly cavity and the sleeve is achieved, while providing independent airtightness detection conditions for the cavity of the claw pole part of the coil body.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] An electronic expansion valve with a coil sealing structure includes a coil body and a valve body. The bottom surface of the coil body has an upwardly extending assembly cavity. A sleeve is coaxially fixed to the top surface of the valve body. The upper part of the sleeve is inserted into the assembly cavity. The valve body also includes a sealing structure. The lower end of the assembly cavity has a double-step annular groove along its axial direction. The double-step annular groove includes an upper groove and a lower groove. The sealing structure includes a sealing ring, a sealing retaining ring, and a fixing frame. The sealing ring is sealed and clamped between the inner circumferential wall of the upper groove and the outer circumferential wall of the sleeve. The sealing retaining ring includes an upper ring body and a lower ring body. The upper ring body is adapted to be embedded in the lower groove. The lower ring body extends axially downward from the bottom surface of the upper ring body and protrudes from the bottom surface of the lower groove. The fixing frame includes a fixing ring and a connecting ear. The fixing ring is sleeved on the outer circumferential wall of the lower ring body and its top surface is fixedly attached to the bottom surface of the upper ring body and the bottom surface of the coil body. The connecting ear extends downward from the edge of the fixing ring and is detachably fixed to the outer wall of the valve body.

[0008] To better implement the above technical solution, optionally, there are at least two connecting ears that are spaced apart, each connecting ear has a first connecting hole, and the outer wall of the valve body has a second connecting hole that corresponds one-to-one with the first connecting hole and is coaxial with it; the connecting ears are fixed by screws, and the screws pass through the first connecting hole and are screwed into the second connecting hole.

[0009] Optionally, the bottom surface of the coil body is provided with a plurality of downwardly extending positioning protrusions spaced around the central axis of the assembly cavity, and the fixing ring is provided with positioning holes that correspond to the positioning protrusions one by one.

[0010] Optionally, the retaining ring is fixed to the bottom surface of the coil body by welding.

[0011] Optionally, the sealing ring is any one of an O-ring, a rectangular ring, or a lip seal.

[0012] The beneficial effects of this utility model are:

[0013] This invention discloses an electronic expansion valve with a coil sealing structure. Through a nested assembly structure consisting of a sealing ring and an upper ring body, a double-layer sealing interface of sealing ring and sealing retainer ring is formed at the lower end of the assembly cavity. This provides an independent, pressurized, and sealed testing environment for the claw electrode chamber within the assembly cavity, ensuring the feasibility and accuracy of airtightness testing. Simultaneously, a fixing ring secures the sealing ring and sealing retainer ring, making the fixing ring, sealing ring, sealing retainer ring, and coil body an integrated module. This simplifies the connection process between the coil body and the valve body, making it suitable for various installations with valve bodies and quick-connect structures, thus having a wide range of applications. Attached Figure Description

[0014] Figure 1 This is a three-dimensional schematic diagram of an electronic expansion valve with a coil sealing structure according to an embodiment of this utility model;

[0015] Figure 2 yes Figure 1 Exploded view;

[0016] Figure 3 yes Figure 2 Exploded view of the central sealing structure;

[0017] Figure 4 yes Figure 1 A sectional view;

[0018] Figure label:

[0019] Coil body 10, assembly cavity 11, upper stepped groove 111, lower stepped groove 112, positioning protrusion 12;

[0020] Valve body 20, sleeve 21;

[0021] Sealing structure 30, sealing ring 31, sealing retaining ring 32, upper ring body 321, lower ring body 322, fixing bracket 33, fixing ring 331, connecting ear 332, first connecting hole 333, positioning hole 334. Detailed Implementation

[0022] The technical solution of this utility model will be described in detail below with reference to the accompanying drawings and specific embodiments. Identical components are indicated by the same reference numerals.

[0023] Please see Figures 1 to 4 This utility model discloses an electronic expansion valve with a coil sealing structure, including a coil body 10, a valve body 20, and a sealing structure 30.

[0024] like Figure 2 As shown, the bottom surface of the coil body 10 has an upwardly extending assembly cavity 11, and the top surface of the valve body 20 is coaxially fixed with a sleeve 21, the upper part of which is inserted into the assembly cavity 11.

[0025] In this embodiment of the utility model, it should be noted that both the coil body 10 and the valve body 20 are existing technologies, and their specific structures will not be described in detail.

[0026] like Figure 2 and Figure 3As shown, the lower inner circumferential wall of the assembly cavity 11 is provided with a double-step annular groove along its axial direction. The double-step annular groove includes an upper step groove 111 and a lower step groove 112. The sealing structure 30 includes a sealing ring 31, a sealing retaining ring 32, and a fixing bracket 33. The sealing ring 31 is sealed and clamped between the inner circumferential wall of the upper step groove 111 and the outer circumferential wall of the sleeve 21. The sealing retaining ring 32 includes an upper ring body 321 and a lower ring body 322. The upper ring body 321 is adapted to be embedded in the lower step groove 112. Inside, the lower ring body 322 extends axially downward from the bottom surface of the upper ring body 321 and protrudes from the bottom surface of the lower stepped groove 112. The fixing frame 33 includes a fixing ring 331 and a connecting ear 332. The fixing ring 331 is sleeved on the outer peripheral wall of the lower ring body 322 and its top surface is fixedly attached to the bottom surface of the upper ring body 321 and the bottom surface of the coil body 10. The connecting ear 332 extends downward from the edge of the fixing ring 331 and is detachably fixed to the outer wall of the valve body 20.

[0027] This invention discloses an electronic expansion valve with a coil sealing structure. Through a nested assembly structure consisting of a sealing ring 31 and an upper ring 321, a double-layer sealing interface of sealing ring 31 and sealing retainer ring 32 is formed at the lower end of the assembly cavity 11. This provides an independent, pressurizable, and sealed testing environment for the claw electrode chamber within the assembly cavity 11, ensuring the feasibility and accuracy of airtightness testing. Simultaneously, the sealing ring 31 and sealing retainer ring 32 are fixed by a fixing ring 331, making the fixing ring 331, sealing ring 31, sealing retainer ring 32, and coil body 10 an integrated module. This simplifies the connection process between the coil body 10 and the valve body 20, making it suitable for various valve-equipped installations and quick-connect structures, thus having a wide range of applications.

[0028] In the embodiments of this utility model, there are at least two connecting ears 332, which are spaced apart. Specifically, there are two connecting ears 332, which are symmetrically arranged around the central axis of the fixing ring 331. Each connecting ear 332 is provided with a first connecting hole 333. The outer wall of the valve body 20 is provided with a second connecting hole that corresponds one-to-one with the first connecting hole 333 and is coaxial. The connecting ears 332 are fixed by screws. The screws pass through the first connecting hole 333 and are screwed into the second connecting hole. The connecting ears 332 and the valve body 20 are connected by screws, which facilitates assembly.

[0029] In an embodiment of this utility model, the bottom surface of the coil body 10 is provided with a plurality of downwardly extending positioning protrusions 12 around the central axis of the assembly cavity 11, and the fixing ring 331 is provided with positioning holes 334 that correspond to the positioning protrusions 12 one by one. The fixing ring 331 is fixed to the bottom surface of the coil body 10 by welding.

[0030] Specifically, there are eight positioning protrusions 12 and eight positioning holes 334. After the two are aligned, the fixing ring 331 and the coil body 10 are integrated by ultrasonic welding or hot riveting at the positioning protrusions 12.

[0031] In the embodiments of this utility model, the sealing ring 31 is any one of an O-ring, a rectangular ring, or a lip seal.

[0032] This utility model discloses an electronic expansion valve with a coil sealing structure. The sealing structure 30 and the coil body 10 are integrated, which facilitates the airtightness testing of the coil body 10 and the connection between the coil body 10 and the valve body 20.

[0033] The technical solution of this utility model has been described in detail above with reference to specific embodiments. The specific embodiments described are used to help understand the concept of this utility model. Derivations and modifications made by those skilled in the art based on the specific embodiments of this utility model also fall within the protection scope of this utility model.

Claims

1. An electronic expansion valve with a coil sealing structure, comprising a coil body (10) and a valve body (20), wherein the bottom surface of the coil body (10) has an upwardly extending assembly cavity (11), and the top surface of the valve body (20) is coaxially fixed with a sleeve (21), the upper part of which is inserted into the assembly cavity (11), characterized in that: It also includes a sealing structure (30); The lower end of the assembly cavity (11) has a double-stage annular groove along its axial direction on the inner peripheral wall. The double-stage annular groove includes an upper stage groove (111) and a lower stage groove (112). The sealing structure (30) includes a sealing ring (31), a sealing retaining ring (32), and a fixing bracket (33). The sealing ring (31) is sealed and clamped between the inner peripheral wall of the upper stepped groove (111) and the outer peripheral wall of the sleeve (21). The sealing retaining ring (32) includes an upper ring body (321) and a lower ring body (322). The upper ring body (321) is adapted to be embedded in the lower stepped groove (112), and the lower ring body (322) is axially extended from the bottom surface of the upper ring body (321). Extending downward and protruding from the bottom surface of the lower stepped groove (112), the fixing frame (33) includes a fixing ring (331) and a connecting ear (332). The fixing ring (331) is sleeved on the outer peripheral wall of the lower ring body (322) and its top surface is fixedly attached to the bottom surface of the upper ring body (321) and the bottom surface of the coil body (10). The connecting ear (332) extends downward from the edge of the fixing ring (331) and is detachably fixed to the outer wall of the valve body (20).

2. The electronic expansion valve with a coil sealing structure according to claim 1, characterized in that, The connecting lugs (332) are at least two and spaced apart. Each connecting lug (332) has a first connecting hole (333). The outer wall of the valve body (20) has a second connecting hole that corresponds one-to-one with the first connecting hole (333) and is coaxial. The connecting lugs (332) are fixed by screws. The screws pass through the first connecting hole (333) and are screwed into the second connecting hole.

3. The electronic expansion valve with a coil sealing structure according to claim 1, characterized in that, The bottom surface of the coil body (10) is provided with a plurality of downwardly extending positioning protrusions (12) spaced around the central axis of the assembly cavity (11), and the fixing ring (331) is provided with positioning holes (334) that correspond to the positioning protrusions (12) and are inserted into them one by one.

4. The electronic expansion valve with a coil sealing structure according to claim 1, characterized in that, The fixing ring (331) is fixed to the bottom surface of the coil body (10) by welding.

5. The electronic expansion valve with a coil sealing structure according to claim 1, characterized in that, The sealing ring (31) is any one of an O-ring, a rectangular ring, or a lip seal.

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