JP2023035812A - Electronic expansion valve and air conditioning unit thereof - Google Patents

Abstract

To provide an electronic expansion valve and an air conditioning unit thereof relating to a technical field of cooling, which have advantages that a mounting height of a screw is lowered by lowering a position of a balance hole, so that a forming height of an internal chamber is lowered, a height of the entire electronic expansion valve is lowered, and costs can be reduced.SOLUTION: In an electronic expansion valve including a valve element and a nut assembly and having a valve chest in the valve element, the nut assembly includes a nut seat and a connection member, at least a part of the nut seat is disposed in the connection member, the connection member is disposed in the valve element, an internal chamber is formed in the nut seat, a balance hole communicated with the internal chamber is formed on a side wall of the nut seat positioned in the connection member, the balance hole penetrates through the connection member to form a balance channel, and the internal chamber and the valve chest are communicated via the balance channel.SELECTED DRAWING: Figure 1

Description

TECHNICAL FIELD The present invention relates to the technical field of cooling, and more particularly to an electronic expansion valve and its air conditioning unit.

As one of the four major components of the cooling circulation system, the electronic expansion valve controls the flow rate of the refrigerant by changing the throttle cross-sectional area, and plays the role of throttling the flow rate to reduce the pressure. Installed between instruments.

In the conventional electronic expansion valve, the position of the balancing hole is relatively high, the mounting position of the screw assembly and the position of the internal chamber of the nut seat must be correspondingly high, and the overall height of the expansion valve is relatively high. cost was increasing.

Based on this, the present invention provides an electronic expansion valve having the following technical aspects for the above technical problems.

An electronic expansion valve including a valve body and a nut assembly and having a valve chamber within the valve body, the nut assembly being provided within the valve chamber, the nut assembly including a nut seat and a connecting member, at least a portion of the nut seat being provided within the connecting member, the connecting member being provided within the valve body, having an internal chamber within the nut seat, and a side wall of the nut seat located within the connecting member having a balancing hole communicating with the internal chamber; A balancing hole extends through the connecting member to form a balancing channel, and the internal chamber and the valve chamber communicate through the balancing channel.

Such an arrangement allows for a low position of the balancing holes, which reduces the mounting height of the screws, reduces the drilling height of the internal chamber, and balances to retract the connecting member. Since there is no need to raise the position of the opening, the height of the electronic expansion valve as a whole can be lowered, and the cost can be reduced.

In one embodiment, the valve body includes a valve seat and a valve sleeve, the valve sleeve is connected to the valve seat, and a first groove is bored in an end face of the connecting member at one end remote from the valve seat, The first groove communicates with the balancing hole.

With such an arrangement, the first groove communicates with the valve chamber so that the inner chamber communicates with the valve chamber.

In one embodiment, the cross-section of the first groove presents a U-shape, a curved shape or a C-shape.

In one embodiment, a second groove is formed in the end face of the connecting member away from the valve seat, and the second groove and the first groove are provided symmetrically with respect to the axis of the connecting member. be done.

According to this arrangement, when the connecting member and the nut are fixed by injection molding, the first groove and the second groove are provided symmetrically. Balance can be ensured, and coaxiality between the connecting member and the nut seat after injection molding can be ensured.

In one embodiment, the valve body includes a valve seat and a valve sleeve, the nut seat includes a connecting segment and a guide segment connected to each other, the guide segment being provided proximate the valve seat relative to the connecting segment. , the inner chamber is located in the connecting segment, the balancing hole is drilled in the side surface of one end adjacent to the guide segment of the connecting segment, and the inner wall of one end adjacent to the guide segment of the balancing hole and the bottom of the inner chamber flush with the wall.

Such an arrangement allows more medium to flow smoothly out of the inner chamber.

In one embodiment, the electronic expansion valve further includes a spindle, a valve seat pierced with a valve port, the spindle extendable into the valve port, and a flow path within the valve seat in communication with the valve port. A guide segment having a channel is fitted to the exterior of the spindle and one end of the guide segment proximate the valve port extends into the channel.

This arrangement protects the spindle from direct impact from the medium, and prevents the vibration of the spindle from impacting the inner wall of the valve opening and generating noise.

In one embodiment, the connecting member includes a body segment and a fitting segment connected to each other, the body segment surrounding the nut seat and the fitting segment fitting into the nut seat.

With this arrangement, the seating area of the connecting member that is seated on the valve seat is increased, so that the strength of the connection between the connecting member and the valve seat can be increased, and the contact area between the connecting member and the nut seat is also increased. As a result, the connection strength between the connection member and the nut seat can be enhanced.

In one embodiment, the inner wall of the body segment is circumferentially provided with a second threaded segment surrounding the inner wall of the body segment, or the inner wall of the body segment is grooved, or the inner wall of the body segment is threaded. A cam is provided.

Such an arrangement increases the strength of the injection molded connection between the nut seat and the connecting member.

In one embodiment, the valve body includes a valve seat and has a gap between the nut seat and the valve seat.

Such an arrangement creates an insulating chamber between the nut seat and the valve seat which acts to protect the nut seat.

The present invention further provides, as a technical aspect, an air conditioning unit including the above electronic expansion valve.

Compared with the prior art, the electronic expansion valve provided in the present invention has a balancing hole drilled in the side wall of the portion of the nut seat located in the connecting member, and the balancing hole passes through the connecting member. By forming the balancing channel, the height of the drilling position of the balancing hole is lowered, the position of the internal chamber of the nut seat and the mounting position of the screw are correspondingly lowered, and the internal structure of the electronic expansion valve is improved. The electronic expansion valve can be made smaller, and the height of the entire electronic expansion valve can be lowered, resulting in cost reduction.

1 is a cross-sectional view of an electronic expansion valve provided by the present invention; FIG. FIG. 2 is a partially enlarged view at A in FIG. 1; FIG. 4 is a cross-sectional view of a nut seat and a connecting member engaged; FIG. 3 is a structural schematic diagram of a connecting member of one embodiment; FIG. 4 is a structural schematic diagram of a connecting member of another embodiment; FIG. 4 is a structural schematic diagram of a connecting member of another embodiment;

In the drawings, each symbol has the following meaning.
100 electronic expansion valve, 101 valve body, 10 valve seat, 11 first opening, 111 first connecting pipe, 12 second opening, 121 second connecting pipe, 13 flow path, 14 valve port, 20 spindle, 21 drain segment, 30 nut assembly, 301 balancing channel, 31 nut seat, 311 guide segment, 312 ramp, 313 connecting segment, 3131 internal chamber, 3132 first threaded segment, 314 balancing hole, 32 screw, 321 spring groove , 322 bearing, 323 first stop member, 33 elastic member, 34 connecting member, 341 body segment, 3411 second threaded segment, 342 fitting segment, 343 first groove, 344 second groove, 40 valve sleeve, 41 valve chamber, 50 detent assembly, 51 connecting post, 511 guide portion, 512 stop block, 52 second stop member.

Hereinafter, the technical aspects of the embodiments of the present invention will be described clearly and completely in combination with the drawings in the embodiments of the present invention. Not an example. All other embodiments that a person skilled in the art can obtain without creative efforts based on the embodiments in the present invention shall fall within the protection scope of the present invention.

It should be noted that when an assembly is said to be "attached" to another assembly, it may be attached directly to the other assembly or there may be intervening assemblies. When an assembly is considered to be "provided" in another assembly, it may be provided directly in the other assembly or there may be intervening assemblies at the same time. When an assembly is considered to be "fixed" to another assembly, it may be fixed directly to the other assembly or there may be intervening assemblies at the same time.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the specification of the present invention herein is for the purpose of describing specific embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any/and all combinations of one or more of the associated listed items.

Referring to FIG. 1, the electronic expansion valve 100 provided in the present invention is installed in an air conditioning unit, and is used to realize the action of throttling and depressurizing the medium flow, and the medium in the pipeline of the air conditioning unit. Can control the flow rate.

Specifically, the electronic expansion valve 100 includes a valve body 101, a spindle 20 and a nut assembly 30. The valve body 101 includes a valve seat 10 and a valve sleeve 40, and has a valve chamber 41 within the valve body 101. , at least a portion of the nut assembly 30 is provided within the valve chamber 41 , the spindle 20 is inserted within the valve seat 10 and connected to the nut assembly 30 , the nut assembly 30 connecting the spindle 20 to the shaft of the spindle 20 . Can be linked to move along a direction.

The valve seat 10 is provided with a first opening 11, a valve opening 14 and a second opening 12. The second opening 12 communicates with the valve opening 14, and a flow path 13 is formed in the valve seat 10. The channel 13 communicates with the first opening 11 and the valve port 14, respectively.

A first connecting pipe 111 is provided in the first opening 11, a second connecting pipe 121 is provided in the second opening 12, and the first connecting pipe 111 and the second connecting pipe 121 facilitates the user to connect to the pipeline of the air conditioning unit.

A drain segment 21 is provided at one end of the spindle 20. During the process of axial movement of the spindle 20, the drain segment 21 can be extended to enter the valve opening 14, and the drain segment 21 has a conical shape. , and according to the different depths to which the drain segment 21 extends into the valve orifice 14, the cross-section of the flow chamber between the outer wall of the drain segment 21 and the inner wall of the valve orifice 14 is different, thereby allowing the medium to flow. control the amount.

The nut assembly 30 includes a nut seat 31 and a screw 32, at least a portion of the nut seat 31 is inserted into the valve seat 10, the nut seat 31 has an inner chamber 3131, and the inner wall of the inner chamber 3131 has a second One threaded segment 3132 is provided, the screw 32 is screwed into the nut seat 31 via the first threaded segment 3132 , the nut seat 31 is connected to the valve seat 10 and one end of the screw 32 is connected to the spindle 20 . Rotationally connected.

The nut seat 31 is made of engineering plastics, which not only reduces the weight of the nut seat 31, but also can be formed by injection molding, so that the quality of the threads in the nut seat 31 can be ensured during the injection molding process.

The nut seat 31 is made of PPS (phenylene sulfide), which has self-lubricating properties and reduces wear between the spindle 20 and the nut seat 31 to avoid stopping. can be done.

Preferably, the nut seat 31 includes a connecting segment 313 and a guide segment 311 , the guide segment 311 is fitted on the outside of the spindle 20 and the inner chamber 3131 is drilled through the connecting segment 313 . In this embodiment, the first opening 11 is the inlet, and the guide segment 311 acts to guide the spindle 20 as the medium enters the channel 13 through the first opening 11 .

Referring to FIG. 2, one end of the guide segment 311 proximate to the valve port 14 extends into the flow path 13, and the guide segment 311 extended into the flow path 13 allows the spindle 20 to directly move from the medium. It is possible to protect against impact, and to prevent the vibration of the spindle 20 from impacting the inner wall of the valve port 14 and generating noise.

The length of the guide segment 311 extending into the channel 13 is L, the inner diameter of the first connecting pipe 111 is _R1 , and _4R1 /5>L> _R1 /5. With this arrangement, the length of the nut seat 31 extending into the channel 13 can be maintained at an appropriate value. and if the length is too short, the protective effect of the nut seat 31 on the spindle 20 is affected. The length of guide segment 311 extended into channel 13 is L, which may be 3R ₁ /5, _{2R 1} /5, and so on.

Specifically, the outer wall of the guide segment 311 and the end surface of one end of the guide segment 311 toward the valve port 14 are chamfered to form an inclined surface 312 to allow the medium to flow smoothly. , to reduce flow resistance and reduce eddy current noise.

The included angle θ between the inclined surface 312 and the axis of the spindle 20 ranges from 15° to 75°. Such an arrangement allows the chamfer of the guide segment 311 to be placed in a suitable range, too large a chamfer affecting the protective effect of the guide segment 311 on the spindle 20 and too small a chamfer leading to the media of the inclined surface 312 . can be understood to affect the guiding action on the flow of The included angle θ between the inclined surface 312 and the axis of the spindle 20 can be 15°, 25°, 35°, 60°, 65°, 75°, and the like.

By having a gap between the nut seat 31 and the valve seat 10, an adiabatic chamber is formed between the nut seat 31 and the valve seat 10, which acts to protect the nut seat 31 and the first connecting pipe. When soldering parts such as 111, the heat insulating chamber can prevent the nut seat 31 from being affected by the high temperature generated during soldering.

Referring to FIG. 3 , the nut assembly 30 further includes a connection member 34 , the hardness of the connection member 34 is greater than the hardness of the nut seat 31 , and the connection member 34 acts to protect the nut seat 31 .

The connecting member 34 and the valve seat 10 are tightly fitted, and the connecting member 34 is made of metal or powder metallurgy. 34 protects the nut seat 31 from damage and ensures the integrity of the nut seat 31 .

The connection member 34 can be made of a material, such as stainless steel, whose hardness is greater than that of engineering plastics.

Specifically, the connection member 34 and the valve seat 10 are tightly fitted, and the hardness of the connection member 34 is equal to or greater than the hardness of the valve seat 10, so that the connection member 34 is press-fitted into the valve seat 10 by interference fit. The deformation of the connecting member 34 is very small or hardly deformed when the valve seat 10 is closed, and the valve seat 10 can prevent the connecting member 34 and the nut seat 31 from rotating.

In one embodiment, the connecting member 34 has an annular shape, and the annular connecting member 34 surrounds the outside of the nut seat 31 .

In another embodiment, the connecting member 34 has a strip shape, and the connecting member 34 is plural, and the plural connecting members 34 surround the outside of the nut seat 31 .

The connecting member 34 includes a body segment 341 and a fitting segment 342 that are connected to each other, the body segment 341 being provided outside the nut seat 31, the fitting segment 342 extending toward the centerline direction of the nut seat 31, and Fitted inside the nut. The fitting segment 342 increases the contact area between the connecting member 34 and the nut seat 31, so that the connection strength between the connecting member 34 and the nut seat 31 can be enhanced.

A fitting segment 342 is provided at one end of the body segment 341 adjacent to the valve opening 14, and the included angle between the body segment 341 and the fitting segment 342 is a right angle, an obtuse angle, or an acute angle. The fitting segment 342 increases the seating area of the connecting member 34 seated on the valve seat 10 , and strengthens the connection strength between the connecting member 34 and the valve seat 10 .

In one embodiment, the body segment 341 has a ring shape, the fitting segment 342 has a strip shape, and the fitting segment 342 is plural, and the plurality of fitting segments 342 are spaced apart from each other and surround the outside of the nut seat 31; When the nut seat 31 and the connecting member 34 are fixed by injection molding, the feed liquid flows into the gaps between the fitting segments 342, thereby increasing the contact area between the nut seat 31 and the connecting member 34, thereby improving the connection between the two. Strength can be enhanced.

In one embodiment, the inner wall of the body segment 341 is provided with a second threaded segment 3411 circumferentially surrounding the inner wall of the body segment 341 and the second threaded segment The connection area between the inner wall of the body segment 341 and the nut seat 31 is increased by 3411, and the strength of the connection between the nut seat 31 and the connecting member 34 by injection molding can be enhanced.

In another embodiment, grooves (not shown) are drilled in the inner wall of the body segment 324 , and likewise the grooves can increase the connection area between the inner wall of the body segment 341 and the nut seat 31 .

In another embodiment, a cam (not shown) is provided on the inner wall of body segment 324 , and likewise the cam can increase the connection area between the inner wall of body segment 341 and nut seat 31 . The body segment 324 may also be provided with other structures to enhance the strength of the injection molded connection between the body segment 341 and the nut seat 31 .

The nut assembly 30 further includes an elastic member 33 , one end of the screw 32 is bored with a spring groove 321 , the elastic member 33 is provided in the spring groove 321 , and one end of the elastic member 33 contacts the screw 32 . The other end is in contact with the spindle 20 , and the screw 32 pushes down the spindle 20 via the elastic member 33 .

The screw 32 and the spindle 20 are rotationally connected via a bearing 322, the bearing 322 is a rolling bearing 322, the outer ring of the bearing 322 and the inner wall of the spring groove 321 are fixedly connected, and the spindle 20 is connected to the inner ring of the bearing 322. The screw 32 controls only the axial movement of the spindle 20 while preventing the spindle 20 from rotating.

The side wall of the portion of the nut seat 31 located within the connecting member 34 is perforated with a balancing hole 314 , which extends through the connecting member 34 to form a balancing channel 301 , an inner chamber 3131 and a By communicating with the valve chamber 41 through the balancing channel 301, the pressure at both ends of the screw 32 can be balanced, and the medium pressure at one end of the screw 32 is too large to cause the screw 32 to descend. avoid. When the balancing channel 301 passes through the connecting member 34, the position of the balancing hole 314 can be relatively close to the valve seat 10, and the position of the balancing hole 314 can be set higher to retract the connecting member 34. The position of the inner chamber 3131 of the nut seat 31 and the position of the one end of the screw 32 close to the valve seat 10 can also be provided relatively low, i.e. this makes the structure of the electronic expansion valve 100 more compact. , low height and material savings.

A first groove 343 is bored in the end face of the connecting member 34 away from the valve seat 10 , and the first groove 343 communicates with the balancing hole 314 . This arrangement allows the opening of the first groove 343 to face the valve chamber 41 and communicate directly with the valve chamber 41 .

The number of balancing holes 314 may be one, two, three or more, and the corresponding first grooves 343 may also be one or more.

Referring to FIG. 4 , in one embodiment, the cross-section of first groove 343 exhibits a C-shape, and first groove 343 does not block balancing hole 314 .

Referring to FIG. 5, in another embodiment, the cross-section of first groove 343 exhibits a U-shape.

Referring to FIG. 6, in another embodiment, the cross-section of the first groove 343 exhibits a curved shape.

In other embodiments, the cross-section of the first groove 343 may be trapezoidal, etc., as long as it communicates with the balancing hole 314 .

A second groove 344 is bored in the end surface of one end of the connecting member 34 away from the valve seat 10, and the second groove 344 and the first groove 343 are symmetrical with respect to the axis of the connecting member 34. be provided.

The nut seat 31 and the connecting member 34 are fixed by injection molding, and the first groove 343 and the second groove 344 are provided symmetrically, so that both sides of the connecting member 34 are balanced during the flow of the feed liquid. This ensures the coaxiality between the connection member 34 and the nut seat 31 after injection molding.

When the connecting member 34 is attached to the valve seat 10, the inner wall of the valve seat 10 is deformed, and the inner walls of the first groove 343 and the second groove 344 and the outer wall of the body segment 341 act to prevent rotation. and prevents the connecting member 34 from interlocking the nut seat 31 and moving relative to the valve seat 10 .

The balancing hole 314 is located between the first threaded segment 3132 and the guide segment 311, the inner wall of one end of the balancing hole 314 adjacent to the guide segment 311 is flush with the bottom wall of the inner chamber 3131, That is, the balancing hole 314 can be located in the bottommost sidewall of the connecting segment 313 to allow more medium to smoothly flow out of the internal chamber 3131 .

The electronic expansion valve 100 further includes a detent assembly 50 , the valve sleeve 40 is provided on the valve seat 10 and the detent assembly 50 is connected to the inner wall of the valve sleeve 40 . A first stop member 323 is provided at one end of the screw 32 remote from the spindle 20 and engages the detent assembly 50 to provide axial positioning of the screw 32 . This prevents the screw 32 from pushing down the spindle 20 indefinitely and prevents the screw 32 from moving indefinitely away from the spindle 20 .

Specifically, the detent assembly 50 includes a second stop member 52 and a connecting post 51, the connecting post 51 is connected to the inner wall of the valve sleeve 40, and the outer surface of the connecting post 51 has a helical guide portion 511. is provided, a helical guide portion 511 forms a guide path, and the second stop member 52 can move on the guide portion 511 .

Stopping blocks 512 are provided at both ends of the connecting post 51 , and when the second stopping member 52 moves to the top of the connecting post 51 , the stopping blocks 512 prevent further movement of the second stopping member 52 . However, the second stop member 52 abuts against the first stop member 323 to prevent further rotation of the screw 32, thereby preventing further movement of the screw 32 away from the spindle 20. do. When the second stop member 52 moves to the lower portion of the connecting post 51, the lower stop block 512 blocks further movement of the second stop member 52, and the second stop member 52 and the first stop are separated from each other. Further movement of the screw 32 toward the spindle 20 is prevented by abutting against the member 323 to prevent further rotation of the screw 32 .

The electronic expansion valve 100 further includes a rotor and a coil (not shown), the rotor being connected to the screw 32 and the coil being external to the valve sleeve 40 for driving the rotor to rotate when the coil is energized. Since the rotor rotates the screw 32 in conjunction with the valve seat 10 and the nut seat 31 is positioned by the valve seat 10, the nut seat 31 does not rotate and the screw 32 moves along the axial direction of the screw 32. By doing so, the spindle 20 is driven to move along the axial direction of the screw 32 .

The rotor is provided in the valve chamber 41 and the spacing between the rotor and the inner wall of the valve sleeve 40 allows the medium flowing out of the balancing channel 301 to flow through the gap between the rotor and the valve sleeve 40 to the valve seat 10 of the screw 32 . to achieve pressure balance across the screw 32 .

The present invention further provides an air conditioning unit including the electronic expansion valve 100 described above.

In the working process, the electronic expansion valve 100 controls the flow rate by controlling the depth of extension of the drain segment 21 of the spindle 20 into the valve opening 14 according to the actual situation of the air conditioning unit. A balancing hole 314 communicating with the internal chamber 3131 of the nut seat 31 is provided in the side wall of the nut seat 31 of the portion located within the connecting member 34, and then through the connecting member 34 to form a balancing channel 301, The medium in the nut seat 31 can flow out from the balancing channel 301 to one end of the screw 32 away from the valve seat 10, achieving pressure balance at both ends of the screw 32, and causing the problem that the screw 32 cannot move down. avoid that. The present invention does not need to set the position of the balancing hole 314 high to retract the connecting member 34, so the installation height of the screw 32 is low and the structure of the electronic expansion valve 100 is more compact. , the overall height can be lowered and the cost can be reduced.

Each technical feature of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of each technical feature in the above embodiments are not described, but the combination of these technical features are to be considered within the ranges provided herein, unless inconsistent.

The above examples merely illustrate some embodiments of the invention, and while the description is specific and detailed, they should not be construed as limiting the scope of the invention. It should be pointed out that a person skilled in the art can make further variations and improvements without departing from the spirit of the present invention, which all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims (10)

An electronic expansion valve comprising a valve body (101) and a nut assembly (30) and having a valve chamber (41) within the valve body (101),
The nut assembly (30) includes a nut seat (31) and a connecting member (34), at least a portion of the nut seat (31) is provided within the connecting member (34), and the connecting member (34) is provided in the valve body (101), has an internal chamber (3131) in the nut seat (31), and is provided on the side wall of the nut seat (31) located in the connecting member (34). A balancing hole (314) communicating with said internal chamber (3131) is drilled, said balancing hole (314) passing through connecting member (34) to form a balancing channel (301), said internal An electronic expansion valve, wherein the chamber (3131) and said valve chamber (41) communicate through said balancing channel (301). The valve body (101) includes a valve seat (10) and a valve sleeve (40), the valve sleeve (40) is connected to the valve seat (10), and the valve seat ( 10), a first groove (343) is drilled in the end face of one end remote from said balance hole (314), said first groove (343) communicating with said balancing hole (314). Electronic expansion valve. 3. The electronic expansion valve according to claim 2, wherein the cross-section of said first groove (343) presents a U-shape, a concavity-shape or a C-shape. A second groove (344) is bored in the end surface of one end of the connecting member (34) away from the valve seat (10), and the second groove (344) is formed with respect to the axis of the connecting member (34). 3. Electronic expansion valve according to claim 2, wherein the groove (344) and the first groove (343) are provided symmetrically. Said valve body (101) comprises a valve seat (10) and a valve sleeve (40), said nut seat (31) comprises a connecting segment (313) and a guide segment (311) connected to each other, said guide A segment (311) is provided close to said valve seat (10) relative to said connecting segment (313), said inner chamber (3131) is located within said connecting segment (313) and said balancing hole (314) is drilled in one end side wall of said connecting segment (313) close to said guide segment (311), and one end inner wall of said balancing hole (314) close to said guide segment (311) and the bottom wall of the inner chamber (3131) are flush with each other. The electronic expansion valve further includes a spindle (20), the valve seat (10) is bored with a valve port (14), and the spindle (20) extends into the valve port (14). the valve seat (10) has a channel (13) communicating with the valve port (14), the guide segment (311) is fitted to the outside of the spindle (20), 6. The electronic expansion valve according to claim 5, wherein one end of the guide segment (311) adjacent to the valve port (14) extends into the flow path (13). Said connecting member (34) comprises a body segment (341) and a fitting segment (342) connected to each other, said body segment (341) being provided surrounding said nut seat (31), said fitting segment (342) ) is fitted in the nut seat (31). A second threaded segment (3411) is provided on the inner wall of said body segment (341), said second threaded segment (3411) being provided circumferentially around said inner wall of said body segment (341). 8. The electronic expansion valve of claim 7, wherein the inner wall of the body segment (324) is grooved or cammed on the inner wall of the body segment (324). The electronic expansion valve according to claim 1, wherein the valve body (101) includes a valve seat (10) and has a gap between the nut seat (31) and the valve seat (10). An air conditioning unit comprising an electronic expansion valve according to any one of claims 1-9.

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