JP7369235B2 - Electronic expansion valve and its air conditioning unit - Google Patents

Description

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

The electronic expansion valve is one of the four major components of the cooling circulation system, and plays the role of controlling the flow rate of refrigerant by changing the throttle cross-sectional area, reducing the flow rate and reducing the pressure. It is installed between the device and the device.

In the conventional electronic expansion valve, the position of the balancing hole is relatively high, the installation position of the screw assembly and the position of the internal chamber of the nut seat need to be correspondingly high, and the overall height of the expansion valve is relatively high. This resulted in an increase in costs.

Based on this, the present invention provides an electronic expansion valve having the following technical aspects to solve the above technical problem.

An electronic expansion valve having a valve chamber within the valve body, the nut assembly including a valve body and a nut assembly, the nut assembly including a nut seat and a connecting member, at least some of the nut seats Provided within the connecting member, the connecting member is provided within the valve body, has an internal chamber within the nut seat, and has a balancing hole in a side wall of the nut seat located within the connecting member that communicates with the internal chamber. A balancing hole passes through the connecting member to form a balancing channel, and the internal chamber and the valve chamber communicate through the balancing channel.

According to such an arrangement, the position of the balancing hole can be lowered, which reduces the mounting height of the screw and reduces the drilling height of the internal chamber, which allows the balancing hole to be lowered in order to withdraw the connecting part. Since there is no need to raise the position of the expansion hole, the height of the electronic expansion valve as a whole is reduced, and costs 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 surface of one end of the connecting member remote from the valve seat, The first groove communicates with the balancing hole.

According to this arrangement, the first groove communicates with the valve chamber, thereby allowing the internal chamber to communicate with the valve chamber.

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

In one embodiment, a second groove is formed in the end surface of one end of the connecting member remote from the valve seat, and the second groove and the first groove are provided symmetrically with respect to the axis of the connecting member. It will 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, so that during the flow of the feed liquid, the first groove and the second groove are provided on both sides of the connecting member. Balance can be ensured, and coaxiality between the connection member and the nut seat after injection molding is 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, and the guide segment is provided proximate the valve seat with respect to the connecting segment. , an internal chamber is located within the connecting segment, and a balancing hole is drilled in the side of one end of the connecting segment adjacent to the guide segment, and the internal wall of the balancing hole is located at one end adjacent to the guide segment and the bottom of the internal chamber. Be 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 is formed with a valve opening, the spindle is extendable into the valve opening, and the valve seat has a flow channel in communication with the valve opening. The guide segment is fitted onto the outside of the spindle, and one end of the guide segment proximate the valve port extends into the flow channel.

With this arrangement, the spindle can be protected from direct impact from the medium, and vibrations of the spindle can prevent impact from being applied to the inner wall of the valve port and generate noise.

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

With this arrangement, the seating area of the connecting member that sits on the valve seat increases, making it possible to strengthen the connection strength between the connecting member and the valve seat, and also increasing the contact area between the connecting member and the nut seat. As a result, the connection strength between the connection member and the nut seat can be strengthened.

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

With this arrangement, the strength of the connection between the nut seat and the connection member by injection molding can be increased.

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

With this arrangement, a heat insulating chamber is formed between the nut seat and the valve seat, which serves to protect the nut seat.

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

Compared with the prior art, the electronic expansion valve provided by the present invention has a balancing hole drilled in the side wall of the part of the nut seat located in the connecting member, and the balancing hole penetrates through the connecting member. By forming the balancing channel, the height of the drilling position of the balancing hole is lowered, and the position of the internal chamber of the nut seat and the mounting position of the screw are also lowered accordingly, and the internal structure of the electronic expansion valve is improved. It is more compact and the height of the entire electronic expansion valve is lower, which can reduce costs.

FIG. 2 is a cross-sectional view of an electronic expansion valve provided by the present invention. FIG. 2 is a partially enlarged view at A in FIG. 1. FIG. FIG. 3 is a cross-sectional view in which the nut seat and the connecting member are engaged. FIG. 3 is a schematic structural diagram of a connecting member according to an embodiment. FIG. 7 is a schematic structural diagram of a connecting member according to another embodiment. FIG. 7 is a schematic structural diagram of a connecting member according to another embodiment.

In the drawings, the meanings of each symbol are as follows.
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 main body segment, 3411 second screw segment, 342 fitting segment, 343 first groove, 344 second groove, 40 valve sleeve, 41 valve chamber, 50 stop assembly, 51 connection column, 511 guide section, 512 stop block, 52 second stop member.

Hereinafter, the technical aspects of the embodiments of the present invention will be clearly and completely explained in combination with the drawings of the embodiments of the present invention, but of course, the described embodiments are only a part of the embodiments of the present invention, and all This is not an example. Based on the embodiments of the present invention, all other embodiments that can be obtained by those skilled in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that when an assembly is referred to as being "attached" to another assembly, it may be directly attached to the other assembly, or there may be an intervening assembly. When an assembly is considered to be “provided” to another assembly, it may be directly provided to the other assembly, or intervening assemblies may be present at the same time. When an assembly is considered "fixed" to another assembly, it may be directly fixed to the other assembly, or intervening assemblies may be present at the same time.

Unless otherwise defined, 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 pertains. Here, the terms used in the specification of the present invention are merely for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and/or" as used herein includes any/and all combinations of one or more of the associated listed items.

Referring to FIG. 1, the electronic expansion valve 100 provided by the present invention is installed in an air conditioning unit, and is used to reduce the pressure by throttling the medium flow rate, and is used to reduce the pressure of the medium in the pipeline of the air conditioning unit. Flow rate can be controlled.

Specifically, the electronic expansion valve 100 includes a valve body 101, a spindle 20, and a nut assembly 30, and 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 disposed within the valve chamber 41 , the spindle 20 is inserted within the valve seat 10 and connected to the nut assembly 30 , and the nut assembly 30 is configured such that the spindle 20 is aligned with the axis of the spindle 20 . Can be linked to move along a direction.

A first opening 11, a valve port 14, and a second opening 12 are bored in the valve seat 10. The second opening 12 communicates with the valve port 14, and a flow path 13 is formed in the valve seat 10. The flow path 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 makes it easy for 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 movement of the spindle 20 in the axial direction, the drain segment 21 can extend and enter the valve port 14, and the drain segment 21 has a conical shape. According to the different extension depths of the drain segment 21 into the valve opening 14, the cross-sections of the flow chamber between the outer wall of the drain segment 21 and the inner wall of the valve opening 14 are different, which allows the flow of the medium to be different. Control quantity.

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 internal chamber 3131, and an inner wall of the internal chamber 3131 has a groove. One screw segment 3132 is provided, the screw 32 is screwed into the nut seat 31 through the first screw 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 plastic, which not only reduces the weight of the nut seat 31, but also can be molded using injection processing, and the quality of the thread inside the nut seat 31 can be ensured during the injection molding process.

The nut seat 31 is made using PPS (Phenylene Sulfide), and PPS has self-lubricating properties to reduce wear between the spindle 20 and the nut seat 31 and avoid stopping. I can do it.

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 internal chamber 3131 is bored in the connecting segment 313. In this embodiment, the first opening 11 is an inlet, and the guide segment 311 performs a guiding action on the spindle 20 when the medium enters the flow path 13 from the first opening 11 .

Referring to FIG. 2, one end of the guide segment 311 that is close to the valve port 14 extends and enters the flow path 13, and the guide segment 311 that extends and enters the flow path 13 has a spindle 20 that is directly connected to the medium. It is possible to protect the valve port 14 from being subjected to impact, and to prevent noise from being caused by impact on the inner wall of the valve port 14 due to the vibration of the spindle 20.

The length of the guide segment 311 that has been extended and entered into the flow path 13 is L, the inner diameter of the first connecting pipe 111 is R ₁ , and 4R ₁ /5>L>R ₁ /5. According to this arrangement, the length of the nut seat 31 extended and entered into the flow path 13 can be maintained at an appropriate value, and if the length is too long, the flow rate of the flow path 13 will be reduced. If the length is too short, the protective effect of the nut seat 31 on the spindle 20 will be affected. The length of the guide segment 311 extended and entered into the flow path 13 is L, and may be 3R ₁ /5, _{2R 1} /5, etc.

Specifically, by chamfering the outer wall of the guide segment 311 and the end face of the guide segment 311 at one end facing the valve port 14, an inclined surface 312 is formed to allow the medium to flow smoothly. , 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 an appropriate range, if the chamfer is too large, it will affect the protective effect of the guide segment 311 on the spindle 20, and if the chamfer is too small, the medium of the inclined surface 312 will be affected. It can be understood that this affects the guiding effect on the flow. The included angle θ between the inclined surface 312 and the axis of the spindle 20 can be 15°, 25°, 35°, 60°, 65°, 75°, etc.

By providing a gap between the nut seat 31 and the valve seat 10, a heat insulating chamber is formed between the nut seat 31 and the valve seat 10, which serves to protect the nut seat 31 and protect the first connecting pipe. When soldering components such as 111, the heat insulating chamber can prevent the high temperature generated during solder welding from affecting the nut seat 31.

Referring to FIG. 3, the nut assembly 30 further includes a connecting member 34, the hardness of the connecting member 34 is greater than the hardness of the nut seat 31, and the connecting member 34 serves 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 using metal or powder metallurgy, and since metal or powder metallurgy is relatively hard, when the connecting member 34 and the valve seat 10 are tightly fitted, the connecting member 34 is made by using metal or powder metallurgy. 34 protects the nut seat 31 from damage, ensuring the integrity of the nut seat 31.

The connecting member 34 can be made of a material such as stainless steel, which has a harder hardness than engineering plastic.

Specifically, the connection member 34 and the valve seat 10 are tightly fitted together, and the hardness of the connection member 34 is greater than or equal to the hardness of the valve seat 10, so that the connection member 34 is tightly fitted and press-fitted into the valve seat 10. During this process, the deformation of the connecting member 34 is ensured to be very small or almost non-deformable, and the valve seat 10 can perform a rotation-stopping effect on the connecting member 34 and the nut seat 31.

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

In another embodiment, the connecting member 34 has a strip shape, and there are a plurality of connecting members 34 , and the plurality of connecting members 34 surround the outer side of the nut seat 31 .

The connecting member 34 includes a main body segment 341 and a fitting segment 342 that are connected to each other, the main body segment 341 is provided on the outside of the nut seat 31, the fitting segment 342 extends toward the center line of the nut seat 31, and Fitted into the nut. The fitting segment 342 increases the contact area between the connecting member 34 and the nut seat 31, and the strength of the connection between the connecting member 34 and the nut seat 31 can be strengthened.

The telescoping segment 342 is provided at one end of the body segment 341 proximate to the valve port 14, and the included angle between the body segment 341 and the telescoping 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 that sits on the valve seat 10, and can strengthen the connection strength between the connecting member 34 and the valve seat 10.

In one embodiment, the body segment 341 has an annular shape, the inset segment 342 has a strip shape, and the inset segment 342 is plural, and the plurality of inset segments 342 surround the outside of the nut seat 31 at intervals, When the nut seat 31 and the connection member 34 are fixed by injection molding, the feed liquid flows into the gap between the fitting segments 342, increasing the contact area between the nut seat 31 and the connection member 34, and improving the connection between the two. Strength can be strengthened.

In one embodiment, the inner wall of the body segment 341 is provided with a second threaded segment 3411, the second threaded segment 3411 is provided circumferentially around the inner wall of the body segment 341, and the second threaded segment 3411 is provided on the inner wall of the body segment 341. 3411 increases the connection area between the inner wall of the main body segment 341 and the nut seat 31, and can strengthen the connection strength between the nut seat 31 and the connecting member 34 by injection molding.

In another embodiment, a groove (not shown) is bored in the inner wall of the body segment 341 , and the groove can also 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 the main body segment 341 , and the cam can also increase the connection area between the inner wall of the main body segment 341 and the nut seat 31. The body segment 341 may also be provided with other structures to strengthen the injection molded connection between the body segment 341 and the nut seat 31.

The nut assembly 30 further includes an elastic member 33, a spring groove 321 is bored at one end of the screw 32, the elastic member 33 is provided in the spring groove 321, and one end of the elastic member 33 abuts against the screw 32. The other end is brought into 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 prevents the spindle 20 from rotating, and the screw 32 controls only the movement of the spindle 20 in the axial direction.

A balancing hole 314 is bored in the side wall of the part of the nut seat 31 located inside the connecting member 34 , and the balancing hole 314 passes through the connecting member 34 to form a balancing channel 301 , which is connected to the internal chamber 3131 . By communicating with the valve chamber 41 via the balance channel 301, the pressures at both ends of the screw 32 can be balanced, and the situation where the medium pressure at one end of the screw 32 is too large to lower the screw 32 can be prevented. Avoid. When the balancing channel 301 passes through the connecting member 34, the position of the balancing hole 314 can be provided relatively close to the valve seat 10, and the position of the balancing hole 314 can be provided higher to retract the connecting member 34. There is no need, and the position of the internal chamber 3131 of the nut seat 31 and the position of one end of the screw 32 close to the valve seat 10 can also be provided relatively low, that is, this makes the structure of the electronic expansion valve 100 more compact. , low height and material saving.

A first groove 343 is bored in the end surface of one end of the connecting member 34 remote from the valve seat 10 , and the first groove 343 communicates with the balancing hole 314 . According to this arrangement, the opening of the first groove 343 can directly communicate with the valve chamber 41 toward 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 first groove 343 has a C-shaped cross section, and the first groove 343 does not block the balancing hole 314.

Referring to FIG. 5, in another embodiment, the first groove 343 has a U-shaped cross section.

Referring to FIG. 6, in another embodiment, the cross section of the first groove 343 has a diagonal shape.

In other embodiments, the cross section of the first groove 343 may be trapezoidal or the like, as long as it can communicate with the balancing hole 314.

A second groove 344 is bored in the end surface of one end of the connecting member 34 remote 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. 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 the balance between both sides of the connecting member 34 is maintained during the flow of feed liquid. The coaxiality between the connecting member 34 and the nut seat 31 after injection molding is ensured.

When the connecting member 34 is attached to the valve seat 10, the inner wall of the valve seat 10 is deformed, and a rotation preventing effect is created between the inner walls of the first groove 343 and the second groove 344 and the outer wall of the main body segment 341. This prevents the connecting member 34 from moving relative to the valve seat 10 in conjunction with the nut seat 31.

The balancing hole 314 is located between the first threaded segment 3132 and the guide segment 311, and 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 internal chamber 3131; That is, the balancing hole 314 can be located on the bottommost sidewall of the connecting segment 313 to allow more medium to flow smoothly 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 the first stop member 323 is engaged with the detent assembly 50 to exert an axial positioning action on the screw 32. This prevents the screw 32 from pushing down on the spindle 20 indefinitely and prevents the screw 32 from moving away from the spindle 20 indefinitely.

Specifically, the lock 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 part 511 forms a guide path, and the second stop member 52 is movable on the guide part 511.

Stop blocks 512 are provided at both ends of the connection post 51, and when the second stop member 52 moves to the top of the connection post 51, the stop blocks 512 prevent further movement of the second stop member 52. However, the second stop member 52 comes into contact with the first stop member 323 and prevents further rotation of the screw 32, thereby preventing the screw 32 from further moving away from the spindle 20. do. When the second stop member 52 moves to the bottom of the connection post 51, the stop block 512 located at the bottom prevents further movement of the second stop member 52, and the second stop member 52 and the first stop block 512 The member 323 abuts against further rotation of the screw 32, thereby preventing further movement of the screw 32 in the direction closer to the spindle 20.

The electronic expansion valve 100 further includes a rotor and a coil (not shown), the rotor is connected to the screw 32, the coil is provided outside the valve sleeve 40, and when the coil is energized, the rotor can be driven to rotate. The rotor rotates the screw 32 in conjunction with the rotor, and the nut seat 31 is positioned by the valve seat 10, so the nut seat 31 does not rotate, thereby causing the screw 32 to move 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 disposed in the valve chamber 41 , and the rotor and the inner wall of the valve sleeve 40 are spaced apart, so that the medium flowing out from the balancing channel 301 can pass through the gap between the rotor and the valve sleeve 40 to the valve seat 10 of the screw 32 . The pressure at both ends of the screw 32 is balanced by entering one end away from the screw.

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

In the operation process, the electronic expansion valve 100 controls the flow rate by controlling the depth at which the drain segment 21 of the spindle 20 extends and enters the valve port 14 based on 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 in the part located within the connecting member 34, and then a balancing channel 301 is formed through the connecting member 34; The medium in the nut seat 31 can flow out from the balancing channel 301 to one end of the screw 32 remote from the valve seat 10, achieving a balance of pressure on both ends of the screw 32, causing the problem that the screw 32 cannot move downwards. avoid that. In the present invention, there is no need to set the position of the balancing hole 314 high in order to retract the connecting member 34, so the mounting height of the screw 32 is lowered, and the structure of the electronic expansion valve 100 is made smaller. , the overall height can be lowered and costs can be reduced.

The technical features of the above embodiments may be combined arbitrarily, and for the sake of brevity, all possible combinations of the technical features of the above embodiments have not been described. Unless there is a contradiction, all terms should be considered within the scope described herein.

The above examples merely illustrate some embodiments of the present invention, and although the descriptions thereof are specific and detailed, they should not be understood as limiting the scope of the invention. It should be pointed out that those skilled in the art can make some further modifications 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 appended 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 some of the nut seats (31) are disposed within the connecting member (34), and the nut seat (31) is disposed within the connecting member (34). is provided in the valve body (101), has an internal chamber (3131) in the nut seat (31), and has a side wall of the nut seat (31) located in the connection member (34). A balancing hole (314) communicating with the internal chamber (3131) is drilled, and the balancing hole (314) passes through the connecting member (34) to form a balancing channel (301), and the balancing channel (301) is formed through the connecting member (34). An electronic expansion valve, wherein the chamber (3131) and the valve chamber (41) communicate via the 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 (101) of the connecting member (34) is connected to the valve seat (10). 10), wherein a first groove (343) is bored in the end face of the one end remote from 10), and the first groove (343) communicates with the balancing hole (314). Electronic expansion valve. The electronic expansion valve according to claim 2, wherein the cross section of the first groove (343) has a U-shape, a bow-shape, or a C-shape. A second groove (344) is bored in the end surface of one end of the connecting member (34) remote from the valve seat (10), and the second groove (344) The electronic expansion valve according to claim 2, wherein the groove (344) and the first groove (343) are provided symmetrically. The valve body (101) includes a valve seat (10) and a valve sleeve (40), the nut seat (31) includes a connecting segment (313) and a guide segment (311) connected to each other, and the guide A segment (311) is provided in close proximity to the valve seat (10) with respect to the connecting segment (313), the internal chamber (3131) is located within the connecting segment (313) and the balancing hole (314) is bored in a side wall of one end of the connecting segment (313) close to the guide segment (311), and an inner wall of one end of the balancing hole (314) close to the guide segment (311). The electronic expansion valve of claim 1, wherein the and the bottom wall of the internal chamber (3131) are flush. The electronic expansion valve further includes a spindle (20), the valve seat (10) is provided with a valve port (14), and the spindle (20) is extended and inserted into the valve port (14). the valve seat (10) has a flow path (13) communicating with the valve port (14), the guide segment (311) is fitted on the outside of the spindle (20); The electronic expansion valve according to claim 5, wherein one end of the guide segment (311) close to the valve port (14) extends and enters the flow path (13). The connecting member (34) includes a body segment (341) and a fitting segment (342) connected to each other, the body segment (341) being provided surrounding the nut seat (31), and the fitting segment (342) being provided surrounding the nut seat (31). ) is fitted into the nut seat (31), the electronic expansion valve according to claim 1. A second threaded segment (3411) is provided on an inner wall of the main body segment (341), the second threaded segment (3411) being provided in a circumferential direction surrounding the inner wall of the main body segment (341). or a groove is bored in the inner wall of the body segment ( 341 ), or a cam is provided in the inner wall of the body segment ( 341 ), and the body segment (341) on the outer wall of the nut seat (31) is provided with a cam. ) is provided with a member of complementary shape corresponding to one of the second screw segment (3411), the groove or the cam provided on the inner wall. electronic expansion valve. 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 the electronic expansion valve according to any one of claims 1 to 9.