CN115596847A

CN115596847A - Electronic expansion valve

Info

Publication number: CN115596847A
Application number: CN202110770484.8A
Authority: CN
Inventors: 请求不公布姓名
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2021-07-08
Filing date: 2021-07-08
Publication date: 2023-01-13

Abstract

This application makes to be equipped with between case and the valve seat spare and holds the slot part through the optimal design to the electronic expansion valve structure, holds the slot part and can reduce relatively because of the influence that receives refrigerant impurity causes the condition that can't normally actuate between case and the valve seat spare inwards sunken and/or the inner peripheral surface of valve seat spare from the surface of case inwards caves in.

Description

Electronic expansion valve

[ technical field ] A method for producing a semiconductor device

The application relates to the technical field of refrigeration control, in particular to an electronic expansion valve.

[ background of the invention ]

The electronic expansion valve is generally provided with a valve port part, and comprises a rotor component, a valve shaft component, a nut component and a valve seat component, wherein the valve seat component comprises a valve core seat and a valve body, the valve core seat is fixedly connected with the valve body, the nut component is fixedly connected with the valve body, the valve shaft component comprises a valve shaft and a valve core, the valve core can be in sliding fit with the valve core seat, the actuation principle is that a stator coil is communicated with a specified pulse current signal, the rotor component is excited and rotated, the rotation motion of a rotor is converted into the up-down motion of the valve shaft through a spiral feeding mechanism, the valve core is close to or far away from the valve port part, so that the refrigerant flow regulation and switching functions are achieved, the condition that impurities carried in a refrigerant enter the valve port part between the valve core and the valve core seat from the valve cavity of the electronic expansion valve can exist, and the normal operation between the valve core and the valve core seat needs to be guaranteed as much as possible for technicians in the field.

[ summary of the invention ]

The invention aims to provide an electronic expansion valve which can relatively reduce the situation that the valve core and a valve seat element cannot normally operate due to the influence of refrigerant impurities.

The application provides an electronic expansion valve, including case and valve seat spare, valve seat spare is equipped with the valve port portion, the case with valve seat spare sliding fit, the case with be equipped with between the valve seat spare and hold the slot portion, hold the slot portion certainly the surface of case is inwards sunken and/or hold the slot portion certainly the internal surface of valve seat spare is inwards sunken, the case with be formed with first clearance and second clearance between the valve seat spare, first clearance is relative the second clearance is closer to valve port portion, hold the slot portion be located first clearance with between the second clearance, following electronic expansion valve's width direction, settlement the degree of depth that holds the slot portion is H3, the width in first clearance is H1, the width in second clearance is H2, then satisfies H3 > H1, and H3 > H2. The electronic expansion valve has the advantages that through the optimized arrangement of the structure of the electronic expansion valve, the accommodating groove part is arranged between the valve core and the valve seat piece, the accommodating groove part is inwards recessed from the outer surface of the valve core and/or inwards recessed from the inner surface of the valve seat piece, the first gap and the second gap are formed between the valve core and the valve seat piece, the first gap is closer to the valve opening part relative to the second gap, the accommodating groove part is positioned between the first gap and the second gap, the depth of the accommodating groove part is set to be H3 along the width direction of the electronic expansion valve, the width of the first gap is H1, the width of the second gap is H2, H3 & gtH 1 is met, H3 & gtH 2 is also met, and the condition that normal action cannot be carried out between the valve core and the valve seat piece due to the influence of refrigerant impurities can be relatively reduced.

[ description of the drawings ]

Fig. 1 is an overall structural sectional view of an electronic expansion valve according to a first embodiment provided in the present application;

FIG. 2 is a schematic cross-sectional view of a valve seat member of the electronic expansion valve of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the first cartridge configuration of FIG. 1; the right side view is a valve core three-dimensional structure schematic diagram of the left side view;

FIG. 4 is a schematic cross-sectional view of a second valve cartridge configuration; the right side view is a valve core three-dimensional structure schematic diagram of the left side view; (ii) a

FIG. 5 is a perspective view of a third valve core structure; the right side view is a valve core cross-sectional schematic diagram of the left side view;

FIG. 6 is a cross-sectional schematic view of the valve seat member of FIG. 1 with an arrangement of receiving groove portions;

FIG. 7 is a cross-sectional schematic view of an alternative receiving channel portion configuration provided in the valve seat member of FIG. 1;

fig. 8 is a sectional view of the overall structure of an electronic expansion valve according to a second embodiment of the present application

[ detailed description ] embodiments

In order to make those skilled in the art better understand the technical solutions provided in the present application, the following detailed description of the technical solutions in the present application is made with reference to the accompanying drawings and specific embodiments.

First embodiment

Referring to fig. 1 to 3, an electronic expansion valve includes a valve seat 10 and a housing 20, the valve seat 10 is manufactured as a blank by, for example, casting, hot stamping, cold heading, etc., and then a desired component is realized by precision lathing on the blank, the valve seat 10 includes a valve seat body 11 and an extension 12, the extension 12 protrudes from the valve seat body 11 in a width direction of the electronic expansion valve, the valve seat body 11 includes a valve port 110, a valve core 42 of the valve core 40 can approach or be separated from the valve port 110, the side wall of the valve seat body 11 is provided with a first interface 111, the first interface 111 substantially circumferentially penetrates through the side wall of the body, a lower portion of the body 11 is provided with a second interface 112, the second interface 112 is substantially axially opened at a lower portion of the body 11, wherein the first interface 111 is fixedly connected to the transverse connector of the electronic expansion valve, the second interface 112 is fixedly connected to the longitudinal connector of the electronic expansion valve, the first interface 112 is fixedly connected to the longitudinal connector of the electronic expansion valve, the longitudinal connector can flow into the valve cavity of the electronic expansion valve through the valve port 110 and then flows into a refrigerant space of the valve cavity, the second interface 15, the valve cavity, the extension 15 is formed by a refrigerant guiding channel, and the second interface 15, the refrigerant flowing into the first interface 15, the refrigerant guiding channel 15, the second interface 15, the refrigerant guiding channel 15 is formed by the transverse connector, and the first interface 15, the second connector, the transverse connector. The side wall portion of the partial housing 20 is press-fitted or clearance-fitted with the fourth guide portion 151, the notched groove portion 15 and the housing 20 can be further fixedly connected by welding or the like to form a relatively closed cavity to accommodate components such as a rotor assembly, the valve seat member 10 is further provided with a first accommodating portion 13 and a second accommodating portion 14, a space of the first accommodating portion 13 can communicate with a space of the second accommodating portion 14 before components such as a nut component and a valve core assembly are mounted, the first accommodating portion 13 is provided with a first accommodating hole 131 and further includes the second guide portion 132, the second accommodating portion 14 is provided with a second accommodating hole 141 and further includes the third guide portion 142;

the electronic expansion valve further comprises a rotor assembly 30, a nut assembly 40 and a valve core assembly 50, wherein the rotor assembly 30 comprises a rotor part 31 and a rotor seat 32, the rotor part 31 and the rotor seat 32 are integrally formed by injection molding, the nut assembly 40 comprises a nut 41 and a connecting member 42, the nut 41 is provided with an internal thread portion 411, the nut 41 can be press-fitted into the valve seat member 10, specifically, part of the nut 41 is located in the second accommodating hole 141 and is press-fitted or clearance-fitted with the third guide portion 142, the connecting member 42 is fixedly connected with the valve seat member 10 to fix the nut assembly 40 integrally with the valve seat member 10, the valve core assembly 50 comprises a lead screw 51, a valve core 52 and a rolling member 53, part of the lead screw 51 is fixedly connected with the rotor seat 32 to rotate along with the rotation of the rotor assembly, the lead screw 51 is provided with an external thread portion 511, the external thread portion 511 is in thread fit with the internal thread portion 411, part of the lead screw 51 is arranged in the nut 41, part of the valve core 52 is located in the first accommodating hole 131, the valve core 52 comprises a main body 521, an adjusting portion 522 and a supporting portion 523, the main body 521 is located between the adjusting portion 522 and the supporting portion 523, a first guiding portion 5211 of the main body 521 is in sliding guiding fit with a second guiding portion 132, the valve core 52 can be installed in the screw rod 51 in a substantially radial direction, the supporting portion 523 is supported on the screw rod 51, the nut 41 substantially limits the radial direction of the valve core assembly 50 to prevent the valve core 52 from being separated from the screw rod, the screw rod 51 can drive the valve core 52 to perform axial lifting motion, the adjusting portion 522 can approach or be away from the valve port 101 to adjust the flow rate of the refrigerant, the operation principle of the electronic expansion valve is briefly described below, the rotor assembly 30 rotates under the excitation of the coil assembly sleeved on the outer periphery of the housing 20, the screw rod 51 rotates along with the rotor assembly, and the rotation motion of the rotor is converted into the axial lifting motion of the valve core assembly through the thread fit effect of the screw rod and the nut, the screw 51 acts on the valve body 52 through the rolling member 53, and the first guide portion 5211 of the valve body 52 is slidably engaged with the second guide portion 132 of the valve seat member 10 to approach downward the valve port portion 101.

The body 521 includes a first guide portion 5211, the valve seat 10 includes a second guide portion 132, the first guide portion 5211 and the second guide portion 132 are slidably engaged, and the first guide portion 5211 and the second guide portion 132 are in a small clearance fit state, it should be noted that the first guide portion and the second guide portion are both referred to as guide wall portions, in this embodiment, a part of the inner peripheral wall of the valve seat 10 may form the second guide portion 132, and at least a part of the outer peripheral wall of the body 521 may form the first guide portion 5211, or for example, a sliding bush may be fixed to the body of the valve plug or to the valve seat, so as to achieve a sliding engagement therebetween.

A containing groove part 5212 is arranged between the valve core body 521 and the valve seat member 10, the containing groove part 5212 can be recessed inwards from the outer surface of the valve core, a first gap H1 and a second gap H2 are formed between the valve core and the valve seat member, the first gap H1 is closer to the valve port part relative to the second gap H2, the containing groove part 5212 is positioned between the first gap H1 and the second gap H2, the depth of the containing groove part is greater than the first gap and the depth of the containing groove part is greater than the second gap along the width direction of the electronic expansion valve, specifically, when the valve core is in sliding fit with the valve seat member and moves downwards to abut against the valve port part, the space of the containing groove part 5212 is communicated with the lower cavity of the electronic expansion valve through the first gap H1, and when the valve core is in sliding fit with the valve seat member and moves upwards to the limit position, namely, the valve core is farthest from the valve port part, the space of the containing groove part 5212 is communicated with the upper cavity of the electronic expansion valve through the second gap H2, with the above arrangement, after the refrigerant flows into the lower cavity from the lateral connecting pipe, the impurities entrained in the refrigerant are suddenly expanded to a larger accommodating groove space due to a narrow lower clearance space, part of the impurities can be placed in the accommodating groove, and the valve element and the valve seat element repeatedly slide, so that the impurities can be placed in the accommodating groove under the action of the pressure difference of the refrigerant, in this embodiment, the accommodating groove 5212 is substantially an annular groove, the accommodating groove 5212 is formed by being recessed inwards from the outer surface of the valve element, the accommodating groove includes a first wall 52121, a second wall 52122 and a transition wall 52123, the first wall 52121 and the second wall 52122 are arranged opposite to each other along the axial direction of the electronic expansion valve, a gap is formed between the first wall and the second wall, and an overlapping region exists between an orthographic projection of the first wall 52121 on the wall in the cross section and an orthographic projection of the second wall 52122 on the cross section on the axis of the electronic expansion valve, the first wall 52121 and the second wall 52122 are located on different sides of the transition wall 52123, the transition wall 52123 extends along the axial direction of the electronic expansion valve, the first wall 52121 is perpendicular to the transition wall 52123, the second wall 52122 is perpendicular to the transition wall, and along the height direction of the electronic expansion valve, the first wall 52121 is located above the second wall 52122 to block refrigerant impurities from further moving upward under the action of a pressure difference, the second wall is used for resting the refrigerant impurities for settling, the distance from any point on the first wall 52121 to the second wall 52122 is equal, the annular groove 5212 is recessed from the first guide 5211 of the body 521, that is, the annular groove 5212 is recessed from the outer peripheral wall of the body 521, the first guide 5211 comprises an upper guide and a lower guide, a second gap H2 is formed between the upper guide portion and the inner peripheral wall of the valve seat member, a first gap H1 is formed between the lower guide portion and the inner peripheral wall of the valve seat member, an annular groove portion 5212 is located between the first gap and the second gap, and both the upper guide portion and the lower guide portion can be in sliding fit with the second guide portion 132, by additionally arranging an accommodating groove portion 5212 between the body portion 521 of the valve core 52 and the valve seat member 10, after the refrigerant enters the accommodating cavity of the electronic expansion valve through the first flow passage 100 or the second flow passage 200, the refrigerant carries fine impurity bodies, the fine impurity bodies can enter the gap between the first guide portion and the second guide portion along with the flowing of the refrigerant, the impurities are easily adhered to the outer surface of the body portion to cause unsmooth operation between the valve core and the valve seat member, and by additionally arranging the accommodating groove portion 5212, a part of the impurities adhered to the outer surface of the body portion is subjected to friction, pressure and the like, can upwards displace gradually to holding in the slot part, because hold the clearance increase between slot part department case and the valve seat spare, and receive the poor effect of pressure, impurity or foreign matter are piling up in holding the slot part and are preventing its further upwards displacement, impurity in the refrigerant can be shelved in the holding tank, can reduce the unable normal sliding fit's of card system condition between case and the valve seat spare that causes because of the influence of refrigerant impurity relatively, guarantee the sliding fit between case and the valve seat spare relatively, the normal function of guarantee case, hold the slot part through the setting and also can prevent that foreign matter or impurity from further upwards getting into screw-thread fit department in addition, the normal action of case has further been ensured.

In order to better place the impurities in the holding tank, relevant values are limited, the first gap is set to be H1, the second gap is set to be H2, H1 is less than or equal to 0.1mm, H2 is less than or equal to 0.1mm, the depth of the annular groove portion 5212 is set to be H3, the height of the annular groove portion is set to be H4, H4 is greater than H1, H4 is greater than H2, H3 is greater than 1.5H1, and H3 is greater than 1.5H2.

Referring to fig. 4 illustrating a second structural embodiment of the accommodating groove portion of the electronic expansion valve provided in the present application, in this embodiment, the accommodating groove portion 5212a is an annular groove portion with an approximately inverted hook shape, and includes a first wall portion 52121a and a second wall portion 52122a, a gap is formed between the first wall portion 52121a and the second wall portion 52122a, the first wall portion 52121a is disposed approximately perpendicular to an axis of the electronic expansion valve, the second wall portion 52122a is an approximately inclined plane structure, the first wall portion 52121a and the second wall portion 52122a intersect with the connection line 52123a, the accommodating groove portion 5212a has a first edge 52124a, the first edge 52124a is disposed on an outer edge side of the first wall portion 52121a, the accommodating groove portion further has a second edge 52125a, the second edge 52125a is disposed on an outer edge side of the second wall portion 52122a, a distance between the first edge and the second edge is set to be S1, a distance between the accommodating groove portion 52123a and a is gradually reduced, and detailed description of the effect of the accommodating groove portion is omitted here.

Referring to fig. 5, a third structural embodiment of the accommodating groove portion of the electronic expansion valve provided in the present application is shown, in this embodiment, the accommodating groove portion 5212c is substantially a spiral groove portion, and includes a first end portion 52121c and a second end portion 52122c, the spiral groove portion is recessed from the outer peripheral wall of the main body portion 521 and is spirally wound around the main body portion 521, the first end portion 52121c and the second end portion 52122c may be located on different horizontal planes, and a gap is formed between the first end portion 5212c and the second end portion 52122c along the axial direction of the electronic expansion valve, and since the first gap and the second gap need to be formed after the spiral groove portion is engaged with the valve seat member, the spiral groove portion does not penetrate through the upper and lower surfaces of the main body portion 521, and the technical effects of the accommodating groove portion are described in detail in the accommodating groove portion of the first structure, and are not described again.

In addition to the above three structural designs, the receiving groove portion provided by the present application may also be formed by disposing one of the first wall portion and the second wall portion on the valve element and disposing the other one on the valve seat member, and the two cooperate to form the receiving groove portion, or on the basis of the first receiving groove portion, an additional component may be added to achieve connection with the valve element or the valve seat member, and a third component and the valve element or the valve seat member together form the receiving groove portion, that is, a part of the receiving groove portion is recessed inward from the outer surface of the valve element and, correspondingly, another part of the receiving groove portion is recessed inward from the inner circumferential surface of the valve seat member, and a part of the receiving groove portion recessed in the outer surface of the valve element and another part of the receiving groove portion recessed in the inner circumferential surface of the valve seat member in the above embodiment are disposed opposite to each other to form the receiving groove portion as a whole;

or the accommodating groove portion may also be independently recessed and disposed on the outer surface of the valve element and the accommodating groove portion is independently recessed and disposed on the inner circumferential surface of the valve seat member, and the accommodating groove portion located in the valve element and the accommodating groove portion located in the valve seat member are disposed in a staggered manner, so that the related technical effects of the present application can also be achieved.

It should be noted that the accommodating groove portion may be recessed inward from the outer surface of the main body portion 521 or recessed from the inner peripheral surface of the second guide portion 132 of the valve seat member 10 to the outer edge portion of the valve seat member 10, as shown in fig. 6 and 7, a part of the inner peripheral wall of the valve seat member 10 in this embodiment forms the second guide portion, the

accommodating groove portion

52121d or 52121e is recessed from the inner peripheral wall of the valve seat member 10 to the outer edge portion of the valve seat member 10, the

accommodating groove portion

52121d or 52121e is located between the valve seat member and the main body portion of the valve body, the accommodating groove portion 12 may be an annular groove portion or a spiral groove portion, or the accommodating groove portion may be provided on the valve seat member and also be provided on the main body portion of the valve body, and the detailed structure and technical effects of the accommodating groove portion are set forth in detail in the above-mentioned contents and will not be repeated here.

In the second embodiment of the electronic expansion valve provided by the present application, briefly described below with reference to fig. 8, in this embodiment, the valve seat member 10' includes a valve seat core 11' and a valve body 12', the valve seat core 11' may be an integrally formed structure, the valve seat core 11' is fixedly connected to the valve body 12', the valve seat core 11' is provided with a valve opening 101', the valve body 12' may be an elongated molded member, the housing is fixedly connected to the valve body 12' to form a relatively closed cavity, components such as a rotor assembly 30' are accommodated in the cavity, the rotor assembly 30' includes a rotor component and a rotor seat, which are injection molded, and further includes a nut assembly 40' and a valve core assembly 50', the nut assembly 40' includes a nut and a connecting member, which is insert molded with the nut, the nut is fixedly connected to the valve body 12' through the connecting member, the nut 41' is provided with an internal threaded portion 411', and further includes a nut guiding portion 43', the valve core assembly 50' includes a screw rod 51' and a valve core 52', an external thread portion 511' of the screw rod 51' is in threaded fit with an internal thread portion 411', the screw rod 51' is fixedly connected with a rotor seat, the valve core assembly 50' may further include components such as a valve core sleeve and an elastic member, the screw rod 51' is in floating connection with the valve core 52', the screw rod can drive the valve core to approach or separate from the valve port 101' to adjust the flow rate of the refrigerant, the valve core seat 11' further includes a second guide portion 112' and a third guide portion 111', in this embodiment, a part of the inner peripheral wall of the valve core seat 11' forms the second guide portion 112', a part of the outer peripheral wall of the valve core seat 11' forms the third guide portion 111', the nut guide portion 43' is in guiding fit with the third guide portion 111', the valve core 52' includes a body portion 521' and an adjusting portion 522', the body portion is provided with a first guide portion 5211', and the first guide portion 5211' is in sliding fit with the second guide portion 112', at least a portion of an outer peripheral wall of the body 521' forms a first guide portion, an accommodating groove portion is further disposed between the body 521' and the valve seat core 11', the accommodating groove portion is recessed inward from the outer peripheral wall of the body 521' and/or the accommodating groove portion may also be recessed from an inner peripheral wall of the valve seat 11' toward the outer peripheral wall of the valve seat 11', as shown in fig. 8, the accommodating groove portion 5212' is recessed inward from the outer peripheral wall of the body 521', and may be in an annular groove portion structure or may also be in a spiral groove portion structure, where a specific structure of the accommodating groove portion is not limited, when a refrigerant enters the accommodating chamber of the electronic expansion valve from the first flow passage and enters the valve seat chamber of the valve seat 11', impurities in the refrigerant can be placed in the accommodating groove under the effect of a pressure difference force and the like, so as to relatively reduce the normal sliding fit between the valve core and the valve seat due to the influence of the refrigerant impurities, and to relatively ensure the normal operation of the valve core, and specific structure of the accommodating groove portion and related technical effects have been set forth in detail in the first embodiment.

The application provides an electronic expansion valve, including case and disk seat spare, disk seat spare is equipped with the valve opening portion, case and disk seat spare sliding fit are equipped with between case and the disk seat spare and hold the slot part, hold the slot part certainly the surface of case is inwards sunken and/or hold the internal surface of slot part from the disk seat spare inwards sunken, be formed with first clearance H1 and second clearance H2 between case and the disk seat spare, first clearance H1 is more close to the valve opening portion relatively second clearance H2, holds the slot part and is located between first clearance and the second clearance, at the width direction along electronic expansion valve, sets for the degree of depth that holds the slot part and be H3, then satisfies H3 > H1, and H3 is greater than H2.

After the refrigerant enters the electronic expansion valve through the first circulation channel or the second circulation channel, part of impurities in the refrigerant can be placed in the accommodating groove part.

Through the optimized setting of the structure of the electronic expansion valve, a containing groove part is additionally arranged between a body part of a valve core and a valve seat piece, the electronic expansion valve without optimized design often has the following technical problems, after a refrigerant enters a containing cavity of the electronic expansion valve through a first circulation channel or a second circulation channel, the refrigerant carries micro impurity bodies, the micro impurity bodies can be subjected to the action of pressure difference along with the flowing of the refrigerant and enter a gap between a first guide part and a second guide part, impurities are easily adhered to the outer surface of the body part, so that the unsmooth action between the valve core and the valve seat piece is caused, the containing groove part is additionally arranged, part of foreign matters adhered to the outer surface of the body part can be gradually upwards displaced into the containing groove part under the action of friction, pressure and the like, the gap between the valve core and the valve seat piece at the containing groove part is increased, and the action of the pressure difference is caused, the impurities or the foreign matters are accumulated in the containing groove part to prevent the impurities from further upwards displacement, the impurities in the refrigerant can be placed in the containing groove, the sliding fit between the valve core and the valve seat piece is relatively guaranteed to normally act, and in addition, the normal action of the valve core can be further prevented from further upwards entering a thread fit through the containing groove part.

It should be noted that, the terms "upper" and "lower" as used herein, or "first" and "second" as used herein, are used as reference in the specification and are introduced for convenience of description; no limitations are intended to the order of components, and certain parts are referred to by the description herein as "identical" in function, since the embodiments are intended to cover the same part, or parts. The electronic expansion valve provided in the related art is described in detail above, and specific embodiments are used for illustration, and the description of the embodiments is only for assisting understanding of the method and the core idea of the present invention, and is not intended to limit the present invention in any way.

Claims

1. The utility model provides an electronic expansion valve, its characterized in that includes case and valve seat spare, valve seat spare is equipped with the valve opening portion, the case with valve seat spare sliding fit, the case with be equipped with between the valve seat spare and hold the slot portion, hold the slot portion certainly the surface of case is inwards sunken and/or hold the slot portion certainly the internal surface of valve seat spare is inwards sunken, the case with be formed with first clearance and second clearance between the valve seat spare, first clearance is relative the second clearance is closer to valve opening portion, hold the slot portion be located first clearance with between the second clearance, following electronic expansion valve's width direction, the settlement the degree of depth that holds the slot portion is H3, the width in first clearance is H1, the width in second clearance is H2, then satisfies H3 > H1, and H3 > H2.

2. An electronic expansion valve according to claim 1, wherein the accommodation groove portion comprises a first wall portion and a second wall portion, a space is formed between the first wall portion and the second wall portion in an axial direction of the electronic expansion valve, and an orthogonal projection of the first wall portion on the cross section and an orthogonal projection of the second wall portion on the cross section overlap each other in a cross section perpendicular to an axis of the electronic expansion valve.

3. The electronic expansion valve according to claim 2, wherein one of the first wall portion and the second wall portion is provided on the valve seat member, and the other is provided on the valve element.

4. The electronic expansion valve according to claim 1, wherein the valve body includes an adjustment portion that is capable of approaching or separating from the valve port portion, and a body portion that includes a first guide portion, and the valve seat member includes a second guide portion, and the first guide portion is slidably fitted with the second guide portion.

5. An electronic expansion valve according to claim 4, wherein the accommodation groove portion is an annular groove portion, at least a part of the outer peripheral wall of the main body portion forms the first guide portion, the first guide portion includes an upper guide portion and a lower guide portion, the lower guide portion forms the first gap H1 with the inner surface, and the upper guide portion forms the second gap H2 with the inner surface.

6. An electronic expansion valve according to claim 4, wherein the annular groove portion comprises a first wall portion, a second wall portion, and a transition wall surface portion, the first wall portion and the second wall portion being located on different sides of the transition wall surface portion, the transition wall surface portion extending in an axial direction of the electronic expansion valve, and a distance from any point on the first wall portion to the second wall portion being equal in the axial direction of the electronic expansion valve.

7. The electronic expansion valve according to claim 4, wherein the annular groove portion is substantially a hook-shaped groove structure, the annular groove portion comprises a first wall portion and a second wall portion, the first wall portion is substantially perpendicular to an axis of the electronic expansion valve, the second wall portion is an inclined wall surface structure, the first wall portion and the second wall portion intersect at a connecting line, the annular groove portion further comprises a first sideline and a second sideline, and a distance from the first sideline to the second sideline is set to S1, and then a distance of S1 gradually decreases toward the connecting line.

8. The electronic expansion valve of claim 1, wherein the accommodation groove portion is a helical groove portion, the helical groove portion comprising a first end portion and a second end portion, the first end portion and the second end portion being located at different levels, and a gap being formed between the first end portion and the second end portion in an axial direction of the electronic expansion valve.

9. The electronic expansion valve according to any one of claims 1 to 8, further comprising a housing, a nut component, a rotor component, and a valve seat component, wherein the valve seat component is of an integrally formed structure and comprises a valve seat component body portion and an extension portion, the extension portion extends outward from the valve seat component body portion in a circumferential direction, the valve seat component is provided with a second guide portion and a third guide portion, the valve seat is in sliding fit with the second guide portion, a nut of the nut component is in clearance fit with or press fit with the third guide portion, the valve seat component is further provided with a third guide portion, the housing is in clearance fit with or press fit with the third guide portion, the nut component is fixedly connected with the valve seat component, and the housing is fixedly connected with the valve seat component.

10. The electronic expansion valve according to claim 9, wherein a part of an inner peripheral wall of the valve seat member body portion forms the second guide portion, the accommodation groove portion is recessed from the inner peripheral wall of the valve seat member body portion toward an outer peripheral wall of the valve seat member body portion, and the accommodation groove portion is an annular groove portion or a spiral groove portion.

11. The electronic expansion valve according to claim 1, wherein the valve seat member comprises a valve seat and a valve body, the valve seat is fixedly connected to the valve body, the valve seat is provided with the valve opening, the electronic expansion valve further comprises a nut assembly, a rotor assembly and a valve core assembly, the nut assembly comprises a nut and a connecting piece, the nut is in guiding fit with the valve seat, the connecting piece is fixedly connected to the valve body, the valve core assembly comprises a lead screw and the valve core, the lead screw is fixedly connected to the rotor assembly, the lead screw is in threaded fit with the nut, and the lead screw is elastically connected to the valve core.

12. The electronic expansion valve of claim 11, wherein a portion of the inner peripheral wall of the valve cartridge seat forms the second guide portion, the receiving groove portion is recessed from the inner peripheral wall of the valve cartridge seat toward the outer peripheral wall of the valve cartridge seat, and the receiving groove portion is an annular groove portion or a helical groove portion.

13. The electronic expansion valve according to claim 1, wherein H1 ≦ 0.1mm, and H2 ≦ 0.1mm, and H3 > 1.5h1 and H3 > 1.5h2, and H4 > H1 and H4 > H2 are satisfied, provided that the height of said accommodation groove portion is H4.