CN220956878U

CN220956878U - Electronic expansion valve

Info

Publication number: CN220956878U
Application number: CN202323052138.XU
Authority: CN
Inventors: 王浩洋; 徐立中; 王华达; 许之浩; 孙苗; 丁沈波; 张斌
Original assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Current assignee: Zhejiang Chunhui Intelligent Control Co Ltd
Priority date: 2023-11-13
Filing date: 2023-11-13
Publication date: 2024-05-14
Anticipated expiration: 2033-11-13

Abstract

The utility model discloses an electronic expansion valve, which comprises a valve core and a valve body, wherein the valve core is arranged on the valve body, the valve core comprises a shell, a valve core seat, a guide piece, a valve port seat, a rotor and a valve needle assembly, the valve core seat, the guide piece and the valve port seat are fixedly arranged, the valve needle assembly penetrates through the guide piece, the lower end of the valve needle assembly is positioned in the valve port seat, the valve needle assembly is connected with the guide piece through threads, the guide piece can lift through rotation, the rotor is fixedly connected with the valve needle assembly, the guide piece comprises a guide post, a rotor ring is sleeved on the periphery of the guide post, a second spring and a third spring are sleeved on the outer wall of the guide post, a stop block is arranged on the inner wall of the rotor, the stop block can be pushed by the rotation of the rotor, the third spring can lift along the second spring, the shell is coated outside the rotor, and the lower end of the shell is fixedly connected with the valve core seat.

Description

Electronic expansion valve

Technical Field

The utility model relates to the technical field of electronic expansion valves, in particular to an electronic expansion valve.

Background

The electronic expansion valve is an important part in a refrigerating system and mainly plays roles in throttling, reducing pressure and regulating flow, the existing electronic expansion valve comprises a valve body, a nut and a valve needle assembly which is in threaded fit with the nut, the valve needle assembly is driven to rotate by a driving device and simultaneously moves up and down, and the opening of a valve port is regulated to realize flow control. For example, in chinese patent No. 202320215969.5, a spring for limiting the vertical movement of the valve needle is installed in the electronic expansion valve, the spring is sleeved on a central column in the center of the inner top surface of the valve core housing, and because the depth of the valve core housing is deeper, the spring is very inconvenient to be sleeved and installed, the existing valve needle and the rotor need to be connected through welding, a stop rod is welded at the upper end of the valve needle to push the spring to limit, the process is complex, and the internal structure of the valve core is complex, so that a technical scheme is needed to solve the problems.

Disclosure of utility model

The utility model aims to solve the technical problem of providing an electronic expansion valve aiming at the technical requirement.

The utility model provides an electronic expansion valve, which comprises a valve core and a valve body, wherein the valve core is arranged on the valve body, the valve core comprises a shell, a valve core seat, a guide piece, a valve port seat, a rotor and a valve needle assembly, the valve core seat, the guide piece and the valve port seat are fixedly arranged, the valve needle assembly penetrates through the guide piece, the lower end of the valve needle assembly is positioned in the valve port seat, the valve needle assembly is connected with the guide piece through threads, the guide piece can lift through rotation, the rotor is fixedly connected with the valve needle assembly, the guide piece comprises a guide column, a rotor ring is sleeved on the periphery of the guide column, a second spring and a third spring are sleeved on the outer wall of the guide column, a stop block is arranged on the inner wall of the rotor, a stop rod is arranged on the third spring, the stop block can be pushed by rotation of the rotor, the third spring can lift along the second spring, and the shell is coated on the outer part of the rotor, and the lower end of the shell is fixedly connected with the valve core seat.

Further, the guide piece comprises a first clamping block and a second clamping block, the first clamping block and the second clamping block are located at the lower end of the outer wall of the guide column, the first clamping block and the second clamping block are distributed left and right, the first clamping block is higher than the second clamping block, the second spring comprises a fixed end, the fixed end can be clamped between the first clamping block and the second clamping block, and a part of the fixed end is clamped below the first clamping block.

Further, the rotor is connected with the valve needle assembly through a connecting piece, the center of the connecting piece is fixedly connected with the top end of the valve needle assembly, and the periphery of the connecting piece is fixedly connected with the inner wall of the rotor.

Further, the connecting piece comprises a plurality of through holes, and the through holes penetrate through the upper end face and the lower end face of the connecting piece.

Further, the stop extends along the length direction of the rotor, and the stop lever moves within the length range of the stop.

Further, the valve port seat penetrates through the valve core seat, the upper end of the valve port seat is fixedly connected with the guide piece, and the valve port seat is communicated with the inside of the guide piece.

Further, the valve needle assembly comprises a valve rod, a needle, a first spring and a valve needle sleeve, the first spring is located inside the needle, the lower end of the valve rod is located inside the needle and abuts against the first spring, the valve needle sleeve is mounted on the top of the needle, the valve rod penetrates through the valve needle sleeve, and the valve needle sleeve limits the lower end of the valve rod.

Further, the guide post inner wall is provided with threads, the valve rod comprises a thread section, and the length of the thread section is smaller than that of the guide post inner wall.

Further, the valve body comprises a first valve port, a second valve port, a first channel and a second channel, the first valve port is communicated with the first channel, the second valve port is communicated with the second channel, the valve core is arranged in the second channel, a part of the valve port seat is positioned in the first channel, and the valve core can be communicated with or blocked from the first channel and the second channel.

Further, the valve seat comprises a valve port III and a valve port IV, the valve port III is positioned on the side wall of the valve seat, the valve port III is communicated with the second channel and the interior of the valve seat, the valve port IV is positioned in the center of the lower end face of the valve seat, the valve port IV is communicated with the first channel and the interior of the valve seat, and the lower end of the valve needle assembly can be blocked or separated from the valve port IV.

Compared with the related art, the electronic expansion valve provided by the utility model has the following beneficial effects:

1. According to the utility model, the rotor is fixedly connected with the valve needle assembly, the spring guide rail and the limit spring are arranged in the rotor, the second spring and the third spring are sleeved on the guide post, the third spring is pushed to lift along the second spring by the stop block on the inner wall of the rotor, and the shell is only required to be sleeved outside the rotor for installation, so that the integral internal structure is simplified, and the assembly production is more convenient.

2. The second spring is a guide rail spring, a spiral lifting track is provided for movement of the third spring, the first clamping block and the second clamping block at the lower end of the guide post form an L-shaped clamping groove, the lower end of the second spring forms an L-shaped fixed end, and the fixed end can be clamped into the clamping groove formed between the first clamping block and the second clamping block, so that the second spring is limited along the axial movement and circumferential rotation of the guide post.

Drawings

Fig. 1 is a schematic perspective view of the present embodiment.

Fig. 2 is an exploded perspective view of the present embodiment.

Fig. 3 is a sectional view of the present embodiment.

Fig. 4 is a schematic diagram showing the connection between the guide member and the second and third springs in this embodiment.

Reference numerals in the drawings: 1. a valve core; 11. a housing; 2. a valve body; 21. a valve port I; 22. a second valve port; 23. a first channel; 24. a second channel; 3. a valve core seat; 31. a first sealing ring; 4. a guide member; 41. a guide post; 42. a clamping block I; 43. a clamping block II; 5. a valve port seat; 51. a valve port III; 52. a valve port IV; 53. a second sealing ring; 6. a rotor; 61. a connecting piece; 611. a through hole; 62. a stop block; 7. a valve needle assembly; 71. a valve stem; 711. a threaded section; 72. a needle; 73. a first spring; 74. a valve needle sleeve; 8. a second spring; 81. a fixed end; 9. a third spring; 91. a gear lever.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Exemplary embodiments of the present utility model are illustrated in the accompanying drawings.

As shown in fig. 1, fig. 2 and fig. 3, the embodiment discloses an electronic expansion valve, which comprises a valve core 1 and a valve body 2, wherein the valve core 1 is installed on the valve body 2, the valve body 2 comprises a valve port one 21, a valve port two 22, a channel one 23 and a channel two 24, the channel two 24 is communicated with the upper end surface of the valve body 2 to form an installation groove for installing the valve core 1, the contact side wall of the valve core 1 and the channel two 24 is isolated by installing a sealing ring one 31, the sealing ring one 23 is positioned in the valve body 2, the valve port one 21 is communicated with the channel one 23, the valve port two 22 is communicated with the channel two 24, the valve core 1 is installed in the channel two 24, a part of a valve port seat 5 is positioned in the channel one 23, an annular groove is formed in the side wall of the valve port seat 5, the annular groove is internally provided with a sealing ring two 53, the side wall of the valve port seat 5 is sealed with the inner wall of the channel one 23, and the valve core 1 can be communicated with or blocked with the channel one 23 and the channel two 24.

As shown in fig. 2 and 3, the valve core 1 comprises a housing 11, a valve core seat 3, a guide piece 4, a valve seat 5, a rotor 6 and a valve needle assembly 7, wherein the valve core seat 3, the guide piece 4 and the valve seat 5 are fixedly installed, the valve seat 5 penetrates through the valve core seat 3, the upper end of the valve seat 5 is fixedly connected with the guide piece 4, the valve seat 5 is communicated with the inside of the guide piece 4, the guide piece 4 and the valve seat 5 are respectively positioned above and below the valve core seat 3, the guide piece 4 and the valve seat 5 are concentrically arranged, the upper end of the valve seat 5 penetrates through the valve core seat 3 and is sleeved in the bottom center of the guide piece 4, the edge of the guide piece 4 is provided with a convex edge, and the convex edge is pressed against the upper end face of the valve core seat 3 to play a limiting role.

As shown in fig. 3, the valve needle assembly 7 comprises a valve rod 71, a needle 72, a first spring 73 and a valve needle sleeve 74, the valve needle assembly 7 penetrates through the guide piece 4, the lower end of the valve needle assembly 7 is located in the valve port seat 5, the valve needle assembly 7 is connected with the guide piece 4 through threads, threads are arranged on the inner wall of the guide post 41, the valve rod 71 comprises a thread section 711, the length of the thread section 711 is smaller than that of the inner wall of the guide post 41, the thread section 711 only moves within the range of the length of the threads of the inner wall of the guide post 41, and the guide piece 4 can lift through rotation.

As shown in fig. 3, more preferably, the first spring 73 is located inside the needle 72, the lower end of the valve rod 71 is located inside the needle 72 and abuts against the first spring 73, the valve needle sleeve 74 is mounted on the top of the needle 72, the valve rod 71 penetrates through the valve needle sleeve 74, the valve needle sleeve 74 limits the lower end of the valve rod 71, when the lower end of the needle 72 abuts against the fourth valve port 52, the valve rod 71 can still move downwards, the valve rod 71 abuts against the first spring 73 to deform, hard contact of the valve needle assembly 7 on the fourth valve port 52 can be avoided, the first spring 73 can play a role of buffering, and the abutting force of the valve rod 71 against the fourth valve port 52 can also be increased.

As shown in fig. 2 and 3, the rotor 6 is fixedly connected with the valve needle assembly 7, the guide piece 4 comprises a guide post 41, the rotor 6 is sleeved on the periphery of the guide post 41, the outer wall of the guide post 41 is sleeved with a second spring 8 and a third spring 9, a stop block 62 is arranged on the inner wall of the rotor 6, as shown in fig. 4, the third spring 9 is provided with a stop rod 91, when the rotor 6 rotates, the stop block 62 can push the stop rod 91, the second spring 8 can serve as a rotating track of the third spring 9, the third spring 9 can spirally lift along the second spring 8, the shell 11 is coated on the outer part of the rotor 6, the lower end of the shell 11 is fixedly connected with the valve core seat 3, the inner part of the valve core 1 is sealed, the stop block 62 extends along the length direction of the rotor 6, the stop rod 91 moves within the length range of the stop block 62, and the third spring 9 does not exceed the bottommost end of the stop block 62 when moving to the bottommost end.

As shown in fig. 4, the guiding element 4 includes a first clamping block 42 and a second clamping block 43, the first clamping block 42 and the second clamping block 43 are located at the lower end of the outer wall of the guiding column 41, the first clamping block 42 and the second clamping block 43 are distributed left and right, the first clamping block 42 is higher than the second clamping block 43, an L-shaped clamping groove is formed between the first clamping block 42 and the second clamping block 43, the second spring 8 includes a fixed end 81, the fixed end 81 is bent to form an L-shape, a vertical portion of the fixed end 81 can be clamped between the first clamping block 42 and the second clamping block 43, a transverse portion of the fixed end 81 can be clamped below the first clamping block 42, the second spring 8 is limited and fixed by axial movement and circumferential rotation of the guiding column 41, and thus the L-shaped fixed end 81 is clamped with an L-shaped groove formed by the first clamping block 42 and the second clamping block 43, the lower end of the second spring 8 is fixedly connected with the guiding element 4, the second spring 8 is only required to be sleeved on the guiding column 41 during installation, the fixed end 81 at the lower end is clamped between the first clamping block 42 and the second clamping block 43, and the second spring 8 is very convenient to install.

As shown in fig. 2 and 3, the rotor 6 is connected with the valve needle assembly 7 through the connecting piece 61, the center of the connecting piece 61 is fixedly connected with the top end of the valve needle assembly 7, the outer periphery of the connecting piece 61 is fixedly connected with the inner wall of the rotor 6, the connecting piece 61 and the rotor 6 are fixedly connected in an injection molding mode, the connecting piece 61 comprises a plurality of through holes 611, the through holes 611 penetrate through the upper end face and the lower end face of the connecting piece 61, the through holes 611 can balance the air pressure of the upper space and the lower space of the connecting piece 61 when the rotor 6 moves along with the valve rod 71, and the air pressure fluctuation formed inside the valve core 1 is prevented from affecting the medium flow in the valve body 2.

As shown in fig. 3, the valve seat 5 comprises a third valve port 51 and a fourth valve port 52, the third valve port 51 is positioned on the side wall of the valve seat 5, the third valve port 51 is positioned in the second channel 24, the third valve port 51 is communicated with the second channel 24 and the interior of the valve seat 5, the fourth valve port 52 is positioned in the center of the lower end face of the valve seat 5, the fourth valve port 52 is communicated with the first channel 23 and the interior of the valve seat 5, the lower end of the valve needle assembly 7 can be blocked or separated from the fourth valve port 52, the lower end of the needle 72 is in a tapered shape with gradually reduced diameter, a part of the descending needle 72 passes through the fourth valve port 52, and the needle 72 can regulate the flow of medium flowing through the fourth valve port 52 in the process of entering or leaving the fourth valve port 52 until the side wall of the needle 72 abuts against the upper edge of the fourth valve port 52, and the first channel 23 and the second channel 24 are blocked, and the first valve port 21 and the second valve port 22 are not communicated.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An electronic expansion valve, characterized in that: the valve comprises a valve core (1) and a valve body (2), the valve core (1) is arranged on the valve body (2), the valve core (1) comprises a shell (11), a valve core seat (3), a guide piece (4), a valve port seat (5), a rotor (6) and a valve needle assembly (7), the valve core seat (3), the guide piece (4) and the valve port seat (5) are fixedly arranged, the valve needle assembly (7) penetrates through the guide piece (4), the lower end of the valve needle assembly (7) is positioned in the valve port seat (5), the valve needle assembly (7) is connected with the guide piece (4) through threads, the guide piece (4) can be lifted through rotation, the rotor (6) is fixedly connected with the valve needle assembly (7), the guide piece (4) comprises a guide post (41), the rotor (6) is sleeved on the periphery of the guide post (41), a second spring (8) and a third spring (9) are sleeved on the outer wall of the guide post (41), a stop block (62) is arranged on the inner wall of the rotor (6), a third spring (9) is provided with a rod (91), the second spring (62) can be pushed by the third spring (91) through rotation, the second spring (9) can be lifted and the third spring (91) can be lifted through rotation of the stop block (91), the shell (11) is coated outside the rotor (6) and the lower end of the shell is fixedly connected with the valve core seat (3).

2. An electronic expansion valve according to claim 1, wherein: the guide piece (4) comprises a first clamping block (42) and a second clamping block (43), the first clamping block (42) and the second clamping block (43) are located at the lower end of the outer wall of the guide column (41), the first clamping block (42) and the second clamping block (43) are distributed left and right, the first clamping block (42) is higher than the second clamping block (43), the second spring (8) comprises a fixed end (81), the fixed end (81) can be clamped between the first clamping block (42) and the second clamping block (43), and a part of the fixed end (81) is clamped below the first clamping block (42).

3. An electronic expansion valve according to claim 1, wherein: the rotor (6) is connected with the valve needle assembly (7) through a connecting piece (61), the center of the connecting piece (61) is fixedly connected with the top end of the valve needle assembly (7), and the periphery of the connecting piece (61) is fixedly connected with the inner wall of the rotor (6).

4. An electronic expansion valve according to claim 3, wherein: the connecting piece (61) comprises a plurality of through holes (611), and the through holes (611) penetrate through the upper end face and the lower end face of the connecting piece (61).

5. An electronic expansion valve according to claim 1, wherein: the stop block (62) extends along the length direction of the rotor (6), and the stop lever (91) moves within the length range of the stop block (62).

6. An electronic expansion valve according to claim 1, wherein: the valve port seat (5) penetrates through the valve core seat (3), the upper end of the valve port seat (5) is fixedly connected with the guide piece (4), and the valve port seat (5) is communicated with the inside of the guide piece (4).

7. An electronic expansion valve according to claim 1, wherein: the valve needle assembly (7) comprises a valve rod (71), a needle (72), a first spring (73) and a valve needle sleeve (74), the first spring (73) is located inside the needle (72), the lower end of the valve rod (71) is located in the needle (72) and abuts against the first spring (73), the valve needle sleeve (74) is mounted at the top of the needle (72), the valve rod (71) penetrates through the valve needle sleeve (74), and the valve needle sleeve (74) limits the lower end of the valve rod (71).

8. An electronic expansion valve according to claim 7, wherein: the inner wall of the guide column (41) is provided with threads, the valve rod (71) comprises a thread section (711), and the length of the thread section (711) is smaller than that of the inner wall of the guide column (41).

9. An electronic expansion valve according to claim 1, wherein: the valve body (2) comprises a first valve port (21), a second valve port (22), a first channel (23) and a second channel (24), wherein the first valve port (21) is communicated with the first channel (23), the second valve port (22) is communicated with the second channel (24), the valve core (1) is arranged in the second channel (24), a part of the valve port seat (5) is positioned in the first channel (23), and the valve core (1) can be communicated with or blocked from the first channel (23) and the second channel (24).

10. An electronic expansion valve according to claim 9, wherein: the valve seat (5) comprises a valve seat III (51) and a valve seat IV (52), the valve seat III (51) is positioned on the side wall of the valve seat (5), the valve seat III (51) is communicated with the inside of the channel II (24) and the valve seat (5), the valve seat IV (52) is positioned in the center of the lower end face of the valve seat (5), the valve seat IV (52) is communicated with the inside of the channel I (23) and the valve seat (5), and the lower end of the valve needle assembly (7) can be blocked or separated from the valve seat IV (52).