Electronic expansion valve easy to maintain

Abstract

The electronic expansion valve easy to maintain comprises a stator assembly, a valve element assembly and a valve body, one end of the valve element assembly is inserted into the stator assembly, the other end of the valve element assembly is inserted into the valve body, a connecting groove is formed in the top of the valve body, the lower end of the valve element assembly is inserted into the connecting groove, and the valve element assembly is detachably connected with the connecting groove. A connecting plate is fixedly arranged on one side of the stator assembly, the connecting plate is attached to one side of the valve body, the connecting plate and the valve body are fixed through a fastener, the structure is reasonable, the connecting structure among the stator assembly, the valve element assembly and the valve body is simple and can be conveniently disassembled, and therefore damaged parts can be maintained.

Description

Technical Field

[0001] The utility model relates to the field of electronic expansion valves, in particular to an electronic expansion valve which is easy to maintain. Background Art

[0002] The electronic expansion valve is an important component in the refrigeration system, and its main function is to throttle, reduce pressure and regulate flow. In the related technology, the electronic expansion valve includes components such as a valve seat assembly, a nut assembly, a valve core assembly and a magnetic rotor assembly. During long-term use, the components inside the electronic expansion valve will age and become damaged. Commonly used electronic expansion valves need to be replaced after they are damaged. The replaced electronic expansion valves are difficult to disassemble and repair, which will cause a waste of resources. How to develop an electronic expansion valve that is easier to disassemble and has superior performance is the direction of research and development at this stage. In response to the above problems, a solution is proposed below. Utility Model Content

[0003] The utility model aims to provide an electronic expansion valve which is easy to maintain and has the advantages of reliable connection and convenient disassembly.

[0004] The above technical objectives of the utility model are achieved through the following technical solutions:

[0005] An easy-to-maintain electronic expansion valve comprises a stator assembly, a valve core assembly and a valve body, wherein one end of the valve core assembly is inserted into the stator assembly, and the other end of the valve core assembly is inserted into the valve body, a connecting groove is provided on the top of the valve body, and the lower end of the valve core assembly is inserted into the connecting groove, the valve core assembly and the connecting groove are detachably connected, a connecting plate is fixedly provided on one side of the stator assembly, the connecting plate is affixed to one side of the valve body, and the connecting plate and the valve body are fixed by fasteners.

[0006] Preferably, a plurality of stabilizing columns are fixedly provided on the lower end surface of the stator assembly, and the plurality of stabilizing columns are distributed around the edge of the lower end surface of the stator assembly. A plurality of stabilizing grooves are provided on the upper end surface of the valve body, and the plurality of stabilizing columns are inserted into the plurality of stabilizing grooves and fixed with the stabilizing grooves.

[0007] Preferably, the valve body is provided with an air inlet channel, an air outlet channel and a connecting chamber, the air inlet channel and the air outlet channel are respectively located on both sides of the valve body, and the air inlet channel and the air outlet channel are both horizontally arranged, the air inlet channel is communicated with one side of the connecting chamber, the air outlet channel is positioned higher than the air inlet channel, and one side of the air outlet channel is communicated with a connecting groove, the connecting groove is located above the connecting chamber, and the lower end of the connecting groove is communicated with the upper part of the connecting chamber, and the lower end of the valve core assembly is blocked at the lower end of the connecting groove to seal the connection between the connecting groove and the connecting chamber.

[0008] Preferably, the valve core assembly includes a valve core housing, a valve core stator, a valve core needle and a valve seat, the valve seat is inserted into the connecting groove, a plurality of side holes are provided on the side wall at the lower end of the valve seat, the inner cavity of the valve seat is communicated with the connecting groove through the side holes, a bottom hole is provided on the lower end surface of the valve seat, the inner cavity of the valve seat is communicated with the connecting cavity through the bottom hole, the valve core stator is fixed in the valve core housing, a channel is provided inside the valve core stator, the valve core needle is located in the channel and is slidably connected to the channel, a spring is provided in the valve core housing, the spring is sleeved on the valve core needle, and the upper end of the spring is abutted against the top of the inner cavity of the valve core housing, and the spring is used to apply elastic force to the valve core needle so that the valve core needle is pressed downward against the bottom hole.

[0009] Preferably, a sealing ring is sleeved on the valve seat, and the sealing ring is used to increase the sealing between the valve seat and the connecting groove.

[0010] The beneficial effects of the utility model are as follows: the valve core assembly is connected to the stator assembly and the valve body through a plug-in structure, the relative position between the stator assembly and the valve body is determined by a plurality of stabilizing columns and stabilizing grooves, and then the connecting plate fixed on the stator assembly is connected to the valve body through fasteners, so that the valve body and the stator assembly are connected and fixed, and after the stator assembly and the valve body are connected, the lower end of the valve core assembly just blocks the position where the connecting groove and the connecting cavity in the valve body communicate, thereby realizing the blocking of the air inlet channel and the air outlet channel inside the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a structural schematic diagram of an embodiment;

[0012] Figure 2 It is a schematic cross-sectional view of the embodiment.

[0013] Figure numerals: 1. stator assembly; 2. valve core assembly; 3. valve body; 4. connecting groove; 5. connecting plate; 6. stabilizing column; 7. air inlet channel; 8. air outlet channel; 9. connecting chamber; 10. valve core shell; 11. valve core stator; 12. valve core needle; 13. valve seat; 14. side hole; 15. bottom hole; 16. spring; 17. sealing ring. DETAILED DESCRIPTION

[0014] The following is only a preferred embodiment of the present invention, and the protection scope is not limited to this embodiment. All technical solutions under the concept of the present invention should belong to the protection scope of the present invention. The same parts are represented by the same figure marks. It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to the directions in the drawings, and the words "bottom" and "top", "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0015] like Figure 1 and Figure 2 As shown, an electronic expansion valve that is easy to maintain includes a stator assembly 1, a valve core assembly 2 and a valve body 3. A slot is provided at the lower end of the stator assembly 1, and the top of the valve core assembly 2 is inserted into the slot. After receiving an external electrical signal, the stator assembly 1 can drive the internal structure of the valve core assembly 2 to move. The other end of the valve core assembly 2 is inserted into the connecting groove 4 at the top of the valve body 3, and the lower end of the valve core assembly 2 completely blocks the lower end of the connecting groove 4, so that the lower end of the connecting groove 4 cannot communicate with other chambers.

[0016] The stator assembly 1 is connected to the valve body 3 so that the lower end of the valve core assembly 2 is fixed in the connection groove 4 of the valve body 3. The lower end surface of the stator assembly 1 is fixed with a plurality of stabilizing columns 6, and the upper end surface of the valve body 3 is provided with a plurality of stabilizing grooves. After the stator assembly 1 and the valve body 3 are close to each other, the plurality of stabilizing columns at the lower end of the stator assembly 1 are respectively inserted into the plurality of stabilizing grooves at the upper end surface of the valve body 3, so that the relative position between the stator assembly 1 and the valve body 3 is fixed and will not deflect. In order to increase the stability between the stator assembly 1 and the valve body 3, a plurality of stabilizing columns 6 are distributed around the edge of the lower end surface of the stator assembly 1, and a plurality of stabilizing grooves are distributed around the edge of the top surface of the valve body 3. A connecting plate 5 is fixed on one side of the stator assembly 1. After the plurality of stabilizing columns 6 are inserted into the plurality of stabilizing grooves, the connecting plate 5 is just attached to the side wall of one side of the valve body 3. Fastening holes are provided on the connecting plate 5 and the side wall of the side of the valve body 3, and the connecting plate 5 is fixed to the valve body 3 by fasteners. In this design, the fastening hole is a threaded hole, and the fastener is a bolt. After the connecting plate 5 and the valve body 3 are fixed by the fastener, the stator assembly 1 and the valve body 3 are also fixed.

[0017] In order to increase the sealing between the stator assembly 1 and the valve body 3, a sealing ring 17 is provided in the connecting groove 4. The side of the valve core assembly 2 that contacts the upper end of the connecting groove 4 will contact the sealing ring 17 to squeeze the sealing ring 17, so that the sealing ring 17 can ensure that the connection between the valve core assembly 2 and the connecting groove 4 will not leak.

[0018] The valve body 3 is provided with an air inlet channel 7, an air outlet channel 8 and a connecting chamber 9. The connecting chamber 9 is located directly below the connecting groove 4, and the upper end of the connecting chamber 9 is communicated with the connecting groove 4. The valve core assembly 2 blocks the connection between the connecting chamber 9 and the connecting groove 4. The air inlet channel 7 and the air outlet channel 8 are respectively located on both sides of the valve body 3, and the air inlet channel 7 and the air outlet channel 8 are both arranged horizontally. The air inlet channel 7 is communicated with one side of the connecting chamber 9, and the position of the air outlet channel 8 is higher than the air inlet channel 7, and one side of the air outlet channel 8 is communicated with the connecting groove 4. When the valve core assembly 2 seals the connection between the connecting chamber 9 and the connecting groove 4, the fluid in the air inlet channel 7 cannot flow into the air outlet channel 8. When the sealing element in the valve core assembly 2 is removed, the fluid in the air inlet channel 7 can flow into the air outlet channel 8.

[0019] The valve core assembly 2 includes a valve core housing 10, a valve core stator 11, a valve core needle 12 and a valve seat 13. The valve core stator 11 is fixed in the valve core housing 10. A channel is provided inside the valve core stator 11. The valve core needle 12 is located in the channel and is slidably connected to the channel. A spring 16 is provided in the valve core housing 10. The spring 16 is sleeved on the valve core needle 12, and the upper end of the spring 16 abuts against the top of the inner cavity of the valve core housing 10. The valve seat 13 is inserted into the connecting groove 4. A plurality of side holes 14 are provided on the side wall of the lower end of the valve seat 13. The inner cavity of the valve seat 13 communicates with the connecting groove 4 through the side holes 14. A bottom hole 15 is provided on the lower end surface of the valve seat 13. The inner cavity of the valve seat 13 communicates with the connecting cavity 9 through the bottom hole 15. In the initial state, the spring 16 exerts a downward elastic force on the valve core seat, so that the valve core needle 12 abuts against the bottom hole 15 at the lower end of the valve seat 13, blocking the bottom hole 15, so that the connecting groove 4 is not connected to the connecting cavity 9. When receiving an external electrical signal, the stator assembly 1 pushes the valve core needle 12 upward, so that the lower end of the valve core needle 12 is separated from the bottom hole 15, so that the fluid in the intake channel 7 can enter the connecting groove 4 through the connecting cavity 9, and finally flow out from the outlet channel 8.

[0020] The specific embodiments described above further illustrate the technical problems, technical solutions and beneficial effects solved by the present invention. It should be understood that the above are only specific embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An easy-to-maintain electronic expansion valve, comprising a stator assembly (1), a valve core assembly (2) and a valve body (3), characterized in that: One end of the valve core assembly (2) is inserted into the stator assembly (1), and the other end of the valve core assembly (2) is inserted into the valve body (3). A connecting groove (4) is provided on the top of the valve body (3), and the lower end of the valve core assembly (2) is inserted into the connecting groove (4). The valve core assembly (2) and the connecting groove (4) are detachably connected. A connecting plate (5) is fixedly provided on one side of the stator assembly (1), and the connecting plate (5) is in contact with one side of the valve body (3). The connecting plate (5) and the valve body (3) are fixed by fasteners.

2. The easy-to-maintain electronic expansion valve according to claim 1, characterized in that: The lower end surface of the stator assembly (1) is fixedly provided with a plurality of stabilizing columns (6), and the plurality of stabilizing columns (6) are distributed around the edge of the lower end surface of the stator assembly (1). The upper end surface of the valve body (3) is provided with a plurality of stabilizing grooves, and the plurality of stabilizing columns (6) are inserted into the plurality of stabilizing grooves and are fixedly engaged with the stabilizing grooves.

3. The easy-to-maintain electronic expansion valve according to claim 2, characterized in that: The valve body (3) is provided with an air inlet channel (7), an air outlet channel (8) and a connecting chamber (9); the air inlet channel (7) and the air outlet channel (8) are respectively located on two sides of the valve body (3), and the air inlet channel (7) and the air outlet channel (8) are both arranged horizontally; the air inlet channel (7) is communicated with one side of the connecting chamber (9); the position of the air outlet channel (8) is higher than that of the air inlet channel (7), and one side of the air outlet channel (8) is communicated with the connecting groove (4); the connecting groove (4) is located above the connecting chamber (9), and the lower end of the connecting groove (4) is communicated with the upper side of the connecting chamber (9); the lower end of the valve core assembly (2) is blocked at the lower end of the connecting groove (4) to seal the connection between the connecting groove (4) and the connecting chamber (9).

4. The easy-to-maintain electronic expansion valve according to claim 3, characterized in that: The valve core assembly (2) comprises a valve core housing (10), a valve core stator (11), a valve core needle (12) and a valve seat (13); the valve seat (13) is inserted into the connecting groove (4); a plurality of side holes (14) are provided on the side wall at the lower end of the valve seat (13); the inner cavity of the valve seat (13) communicates with the connecting groove (4) through the side holes (14); a bottom hole (15) is provided on the lower end surface of the valve seat (13); the inner cavity of the valve seat (13) communicates with the connecting cavity (9) through the bottom hole (15); the valve core The stator (11) is fixed in the valve core housing (10), and a channel is provided inside the valve core stator (11). The valve core needle (12) is located in the channel and is slidably connected to the channel. A spring (16) is provided in the valve core housing (10), and the spring (16) is sleeved on the valve core needle (12), and the upper end of the spring (16) is against the top of the inner cavity of the valve core housing (10). The spring (16) is used to apply elastic force to the valve core needle (12) so that the valve core needle (12) is pressed downward against the bottom hole (15).

5. The easy-to-maintain electronic expansion valve according to claim 4, characterized in that: A sealing ring (17) is sleeved on the valve seat (13), and the sealing ring (17) is used to increase the sealing performance between the valve seat (13) and the connecting groove (4).

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