阅读说明：本技术 一种电子膨胀阀 (Electronic expansion valve ) 是由 不公告发明人 于 2020-05-19 设计创作，主要内容包括：一种电子膨胀阀,其特征在于,包括阀体部件、螺母部件、丝杆阀针组件,所述阀体部件具有阀口部和导向部,所述丝杆阀针组件包括丝杆、阀针以及悬挂件,所述丝杆与所述螺母部件螺纹配合,所述阀针与所述导向部滑动配合,所述阀针能够接近或远离所述阀口部,所述悬挂件与所述丝杆能够相抵,且所述悬挂件与所述阀针能够相抵；或者所述悬挂件与所述丝杆固定连接或限位连接,且所述悬挂件与所述阀针能够相抵；或者所述悬挂件与所述阀针固定连接或限位连接,且所述悬挂件与所述丝杆能够相抵,所述丝杆能够通过所述悬挂件带着所述阀针朝远离所述阀口部的方向运动,当丝杆相对阀口发生偏斜现象时,能够相对减少阀针受受丝杆的影响相对阀口进行偏斜。(An electronic expansion valve is characterized by comprising a valve body part, a nut part and a screw rod valve needle assembly, wherein the valve body part is provided with a valve opening part and a guide part, the screw rod valve needle assembly comprises a screw rod, a valve needle and a suspension part, the screw rod is in threaded fit with the nut part, the valve needle is in sliding fit with the guide part, the valve needle can be close to or far away from the valve opening part, the suspension part can be abutted against the screw rod, and the suspension part can be abutted against the valve needle; or the suspension part is fixedly connected or in limited connection with the screw rod, and the suspension part can be abutted against the valve needle; or the hanging part is fixedly connected or in limiting connection with the valve needle, the hanging part can be abutted against the screw rod, the screw rod can drive the valve needle to move towards the direction far away from the valve port part through the hanging part, and when the screw rod deflects relative to the valve port, the valve needle can be relatively reduced from being deflected relative to the valve port under the influence of the screw rod.)

1. An electronic expansion valve is characterized by comprising a valve body part, a nut part and a screw valve needle assembly, wherein the valve body part is provided with a valve opening part, the screw valve needle assembly comprises a screw, a valve needle and a suspension part, the screw comprises a screw thread part of the screw, the nut part comprises a screw thread part of the nut, the screw thread part of the screw is in threaded fit with the screw thread part of the nut, the valve body part further comprises a guide part, the valve needle is in sliding fit with the guide part, and the valve needle can approach or be far away from the valve opening part;

the suspension part is fixedly connected or in limit connection with the valve needle, the screw rod comprises a first supporting part, the suspension part comprises a first suspension part, the first supporting part is closer to the valve port part relative to the first suspension part, and the first supporting part can abut against the first suspension part;

or the suspension part is fixedly connected or in limited connection with the screw rod, the suspension part comprises a second support part, the valve needle comprises a second suspension part, the second support part is closer to the valve port part relative to the second suspension part, and the second support part can be abutted against the second suspension part;

or the screw rod comprises the first supporting part, the suspension part comprises the first suspension part and the second supporting part, the valve needle comprises the second suspension part, the first supporting part can abut against the first suspension part, and the second supporting part can abut against the second suspension part.

2. The electronic expansion valve according to claim 1, further comprising a rolling member, wherein the screw rod has a gap with the steel ball when the valve needle is not abutted against the valve port portion, the first suspension portion is abutted against the first support portion, and the second support portion is abutted against the second suspension portion; when the screw rod abuts against the steel ball, the valve needle abuts against the valve opening part, the second support part and the second suspension part have a gap, the screw rod and the suspension part are not provided with a structure capable of preventing the screw rod and the suspension part from being separated from each other in at least one radial direction, and the valve needle and the suspension part are not provided with a structure capable of preventing the valve needle and the suspension part from being separated from each other in at least one radial direction.

3. The electronic expansion valve of claim 2, wherein the rolling member is a steel ball, the spindle needle assembly has a receiving portion, a portion of the rolling member is located in the receiving portion and the rolling member is capable of freely rotating in the receiving portion, and the rolling member abuts against the needle.

4. The electronic expansion valve according to any of claims 1-3, wherein the suspension member is slidably or clearance-fitted to the nut guide portion, the suspension member is substantially in the form of an arc-shaped cylindrical structure having openings at upper and lower sides thereof, a sidewall of the suspension member is notched and includes a first suspension portion, a second support portion, and a boss portion, the boss portion is located between the first suspension portion and the second support portion, the suspension member has a first receiving groove formed with a first notch toward the notch, and a second receiving groove formed with a second notch toward the notch, the screw is inserted into the first receiving groove through the first notch in the radial direction, the valve needle is inserted into the second receiving groove through the second notch in the radial direction, .

5. The electronic expansion valve of claim 4, wherein the first suspension portion and the boss portion substantially define the first receiving groove, the second support portion and the boss portion substantially define the second receiving groove, the lead screw, the valve needle, and the boss portion substantially define the receiving portion, the boss portion having a boss end surface, the electronic expansion valve including a steel ball that is raised above the boss end surface.

6. The electronic expansion valve according to claim 1, wherein the suspension member is slidably guided or clearance-fitted to the nut guide portion, the suspension member is substantially in the form of an arc-shaped sleeve portion having a sleeve cavity including a bottom wall and a sleeve wall, the sleeve wall being provided with a notch groove, the bottom wall being provided with a through hole, the sleeve being further provided with an opening, the sleeve portion including a first suspension portion and a second suspension portion, the sleeve portion being disposed around the valve needle, the valve needle extending from the opening out of the sleeve portion, the screw rod being radially inserted into the sleeve cavity through the notch groove, the first suspension portion abutting against the second suspension portion, and the second suspension portion abutting against the first support portion; or the sleeve part is sleeved on the outer periphery of the screw rod, the screw rod extends out of the sleeve part from the opening along the shaft, the valve needle is inserted into the cylinder cavity through the notch groove along the radial direction, the first suspension part is abutted against the first supporting part, and the second suspension part is abutted against the second suspension part.

7. The electronic expansion valve according to claim 6, wherein the valve needle is provided with a valve needle receiving groove which is recessed inward from an end surface of the second suspension portion, the electronic expansion valve further comprising a steel ball, a part of the steel ball being located in the valve needle receiving groove, the steel ball being capable of abutting against the lead screw; or the lead screw is equipped with the lead screw holding tank, the lead screw holding tank by first supporting part is inside sunken, part the steel ball is located the lead screw holding tank, the steel ball can with the needle offsets, the needle holding tank or the lead screw holding tank adds and is equipped with the grease.

8. The electronic expansion valve according to any one of claims 2, 3, 6, and 7, wherein the first supporting portion is integrated with a screw rod, or the first supporting portion is fixedly or limitedly connected with the screw rod, and the second suspension portion is integrated with the valve needle, or the second suspension portion is fixedly or limitedly connected with the valve needle.

9. The electronic expansion valve of claim 1, wherein the suspension is insert molded with the screw, the suspension part can be abutted against the valve needle, the electronic expansion valve comprises a steel ball, the screw rod valve needle assembly is provided with an accommodating part, the steel ball is positioned in the accommodating part and can freely rotate, the steel ball is abutted against the valve needle, the suspension part comprises a second support part, the valve needle comprises a second suspension part, when the valve needle is not abutted against the valve port part, the screw rod has a gap with the steel ball, the second suspension part is abutted against the second support part, when the screw rod abuts against the steel ball, the valve needle abuts against the valve port part, a gap is formed between the second suspension part and the second support part, in at least one radial direction, the valve needle and the suspension member are not provided with a structure capable of preventing the valve needle and the suspension member from being disengaged from each other.

10. The electronic expansion valve of claim 1, wherein the suspension element is insert molded with the valve needle, the suspension part can be abutted against the screw rod, the electronic expansion valve comprises a steel ball, the screw rod valve needle assembly is provided with an accommodating part, the steel ball is positioned in the accommodating part and can freely rotate, the steel ball is abutted against the valve needle, the screw rod comprises a first supporting part, the suspension part comprises a first suspension part, when the valve needle is not abutted against the valve port part, the screw rod has a gap with the steel ball, the first suspension part is abutted against the first supporting part, when the screw rod abuts against the steel ball, the valve needle abuts against the valve port part, a gap is formed between the first suspension part and the first supporting part, in at least one radial direction, the lead screw and the suspension member are not provided with a structure capable of preventing the lead screw and the suspension member from being disengaged from each other.

11. The electronic expansion valve according to claim 1, wherein a sidewall of the suspension member is provided with a notched groove through which the valve needle extends into the suspension member in a substantially radial direction, and wherein the first suspension portion abuts against the first support portion and the second suspension portion abuts against the second support portion when the valve needle is not abutting against the valve port portion; when the valve needle abuts against the valve port part, a gap is formed between the second support part and the second suspension part, and a gap is formed between the screw rod and the second suspension part; or when the valve needle is not abutted against the valve port part, the second support part is abutted against the second suspension part, when the valve needle is abutted against the valve port part, a gap is formed between the second support part and the second suspension part, and a gap is formed between the second suspension part and the screw rod; or when the valve needle is not abutted against the valve port part, the first supporting part is abutted against the first suspension part, when the valve needle is abutted against the valve port part, a gap is formed between the first supporting part and the first suspension part, and a gap is formed between the first supporting part and the valve needle.

12. The electronic expansion valve according to claim 1, wherein the valve needle comprises a first abutting portion, the first abutting portion has a gap with the screw rod when the valve needle is not abutted against the valve port portion, and the valve needle is abutted against the suspension member; when the first abutting part abuts against the screw rod, the valve needle abuts against the valve opening part, and a gap is formed between the valve needle and the suspension part; or when the valve needle is not abutted against the valve opening part, the first abutting part has a gap with the screw rod, and the screw rod abuts against the suspension part; when the first abutting part abuts against the screw rod, the valve needle abuts against the valve opening part, and a gap is formed between the screw rod and the suspension part.

13. The electronic expansion valve according to claim 1, wherein the screw comprises a second abutting portion having a gap with the valve needle when the valve needle is not abutted against the valve port portion, the valve needle being abutted against the suspension member; when the second abutting part abuts against the valve needle, the valve needle abuts against the valve port part, and a gap is formed between the valve needle and the suspension part; or

When the valve needle is not abutted against the valve port part, the second abutting part has a gap with the valve needle, and the screw rod abuts against the suspension part; when the second abutting part abuts against the valve needle, the valve needle abuts against the valve opening part, and a gap is formed between the screw rod and the suspension part.

14. The electronic expansion valve according to claim 1, wherein the valve needle comprises the first abutment portion, the screw comprises the second abutment portion, and when the valve needle is not abutted against the valve port portion, the first abutment portion and the second abutment portion have a gap, and the valve needle is abutted against the suspension member; when the first abutting part abuts against the second abutting part, the valve needle abuts against the valve opening part, and a gap is formed between the valve needle and the suspension part; or when the valve needle is not abutted to the valve port part, the first abutting part and the second abutting part have a gap, and the screw rod is abutted to the suspension part; when the first abutting part abuts against the second abutting part, the valve needle abuts against the valve opening part, and a gap is formed between the screw rod and the suspension part.

15. The electronic expansion valve according to any of claims 12-14, wherein the first abutting portion and the valve needle are of an integral structure, and the first abutting portion may be a hemispherical portion, an arc portion or a pointed portion protruding upward from the second suspension portion of the valve needle, or the first abutting portion and the valve needle are fixedly connected or connected in a limiting manner or in an adhesive manner; the second abutting part and the screw rod are of an integral structure, and the second abutting part can be a hemispherical part, an arc part or a pointed part which is downwards protruded from the first supporting part of the screw rod, or the second abutting part is fixedly connected or in limited connection with the screw rod.

[ technical field ] A method for producing a semiconductor device

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

[ background of the invention ]

Electronic expansion valve includes the valve body, nut component and lead screw needle part, the valve body is equipped with the valve port, nut component and valve body fixed connection, lead screw needle part includes lead screw and needle, lead screw and nut component screw-thread fit, by coil excitation effect and screw-thread fit transmission effect, the needle can carry out axial elevating movement in order to be close or keep away from the valve port, receive the parts machining deviation or actuate influence such as environment, when the lead screw takes place the skew, the needle probably receives the lead screw influence to exist the condition that the skew takes place for the relative valve port.

[ summary of the invention ]

The invention aims to provide an electronic expansion valve with a novel structure, which relatively reduces the influence of the actuation of a screw rod on a valve needle and the deflection of a valve port.

The invention provides an electronic expansion valve, which comprises a valve body part, a nut part and a screw rod valve needle assembly, wherein the valve body part is provided with a valve opening part, the screw rod valve needle assembly comprises a screw rod, a valve needle and a suspension part, the screw rod comprises a screw rod thread part, the nut part comprises a nut thread part, the screw rod thread part is in thread fit with the nut thread part, the valve body part also comprises a guide part, the valve needle is in sliding fit with the guide part, the valve needle can be close to or far away from the valve opening part, the suspension part is fixedly connected or in limited connection with the valve needle, the screw rod comprises a first support part, the suspension part comprises a first suspension part, the first support part is closer to the valve opening part relative to the first suspension part, and the first support part can be abutted against the first suspension part;

or the suspension part is fixedly connected or in limited connection with the screw rod, the suspension part comprises a second support part, the valve needle comprises a second suspension part, the second support part is closer to the valve port part relative to the second suspension part, and the second support part can be abutted against the second suspension part;

or the screw rod comprises the first supporting part, the suspension part comprises the first suspension part and the second supporting part, the valve needle comprises the second suspension part, the first supporting part can abut against the first suspension part, and the second supporting part can abut against the second suspension part.

The invention relates to an electronic expansion valve structure, which comprises a screw rod valve needle assembly, wherein the screw rod valve needle assembly comprises a screw rod, a valve needle and a suspension part; or the suspension part is fixedly connected or in limited connection with the screw rod, and the second support can abut against the second suspension part; or the first supporting part can be abutted against the first suspension part, and the second supporting part can be abutted against the second suspension part, so that the situation that the valve needle is influenced by the action of the screw rod and deflects with the valve port can be relatively reduced.

[ description of the drawings ]

Fig. 1 is a cross-sectional view of the overall structure of a valve needle of an electronic expansion valve provided in the present application, relatively far from a valve port portion;

fig. 2 is a cross-sectional view of the overall structure of the valve needle of the electronic expansion valve provided by the present application abutting against the valve port;

fig. 3 is a schematic structural diagram of parts above a valve needle of the electronic expansion valve provided in the present application;

fig. 4 is a sectional view of a first embodiment of a lead screw valve needle assembly structure of an electronic expansion valve provided in the present application;

FIG. 5 is a perspective view of a suspension arrangement of the spindle valve needle assembly of FIG. 4;

FIG. 6 is a perspective side schematic view of the spindle valve needle assembly of FIG. 4;

fig. 7 is a second embodiment of a lead screw valve needle assembly structure of an electronic expansion valve provided in the present application (a suspension member is sleeved on the lead screw);

FIG. 8 is a perspective and cross-sectional schematic view of the lead screw valve pin assembly of FIG. 7;

FIG. 9 is a cross-sectional schematic view of the spindle-valve-needle assembly of FIG. 7 and a schematic view of the valve needle being installed into a hanger;

fig. 10 shows a second embodiment of a spindle-valve needle assembly structure of an electronic expansion valve provided in the present application (a suspension member is sleeved on the valve needle);

fig. 11 is a third embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

FIG. 12 is a schematic cross-sectional view of the lead screw valve pin assembly of FIG. 11;

fig. 13 is a fourth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

FIG. 14 is a cross-sectional view of the lead screw needle assembly of FIG. 13, respectively, in an open-closed valve state;

fig. 15 is a fifth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

FIG. 16 is a perspective view of various components of the lead screw valve pin assembly of FIG. 15;

fig. 17 is a sixth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

fig. 18 is a seventh embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

FIG. 19 is a cross-sectional schematic view of the lead screw valve pin assembly structure of FIG. 18;

fig. 20 is an eighth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

fig. 21 is a ninth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

fig. 22 is a tenth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

fig. 23 is an eleventh embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

fig. 24 is a twelfth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

figure 25 is a schematic diagram in exploded and perspective of the spindle needle assembly of figure 24;

fig. 26 is a thirteenth embodiment of a lead screw valve needle assembly of an electronic expansion valve provided herein;

FIG. 27 is a cross-sectional schematic view of the spindle valve needle assembly of FIG. 26;

fig. 28 is a fourteenth embodiment of a screw valve needle assembly of an electronic expansion valve provided in the present application

[ detailed description ] embodiments

It should be noted that, the present invention is focused on the matching connection relationship among the protective screw valve needle assembly structure, the valve needle, the screw and the suspension member, and the structure of other structures of the electronic expansion valve, such as the rotor component, the coil component, etc., can be adjusted according to the system or other needs and according to the situation.

The application provides an electronic expansion valve, including valve body part 10, nut part 50, feed screw valve needle assembly A, valve body part 10 has valve port 11 and guiding part 13, valve port 11 has valve port 110, valve body part 10 can be processed integrally by lathing etc. mode to shape wholly, can make up and fixedly connect after setting up valve port 11 and/or guiding part 13 separately, can for example set up valve port 11 and valve body part 10 separately and then fixedly connect them, valve port 11 refers to the part where valve port 110 locates, guiding part 13 can be an integral structure with valve body part 10, can set up separately, process and fixedly connect with valve body part 10 as an independent spare part, guiding part 13 has guiding hole 131, as shown in figure 1-2, when the electronic expansion valve is totally closed without flow regulation, can set up valve needle 70 close to or far away from valve port 11, the valve needle can be abutted against the valve port 11, and the refrigerant can not flow out from the valve port 110 to the longitudinal connecting pipe after entering the valve cavity from the transverse connecting pipe.

The nut 50 may be fixedly connected to the valve body part 10, the spindle needle assembly a includes a spindle 60, a needle 70, and a hanger 80, the spindle 60 is screw-coupled to the nut 50, the spindle 60 includes a spindle screw portion, the nut 50 includes a nut screw portion 53 and a nut guide portion 54, the spindle screw portion is screw-coupled to the nut screw portion 53, the nut guide portion 54 has a nut guide hole, a portion of the spindle 60 is located in the nut guide hole, the hanger 80 may be slidably guide-coupled to the nut guide portion 54 of the nut 50 or may be clearance-coupled to the nut guide portion 54, the needle 70 is slidably coupled to the guide portion 13, the needle 70 is adapted to the guide hole 131 and the needle 70 may perform an axial elevating movement in the guide hole 131, the needle 70 may approach or be away from the valve port portion 11, the hanger 80 is fixedly connected or position-limited connected to the needle 70, the spindle 60 includes a first support portion 61, the hanger 80 includes a first hanging portion 81, the first supporting portion 61 is closer to the valve port portion 11 than the first hanging portion 81 to be able to support the first hanging portion, the first supporting portion 61 is able to abut against the first hanging portion 81; or the suspension member 80 is fixedly or in limited connection with the screw rod 60, the suspension member 80 comprises a second support portion 82, the valve needle 70 comprises a second suspension portion 71, the second support portion 82 is closer to the valve port portion 11 relative to the second suspension portion 71 so as to be capable of supporting the second suspension portion, and the second support portion 82 can be abutted against the second suspension portion 71; or the lead screw 60 includes the first supporting portion 61, the suspension 80 includes a first suspension portion 81 and a second supporting portion 82, the valve needle 70 includes a second suspension portion 71, the first supporting portion 61 is closer to the valve port portion 11 than the first suspension portion 81, the second supporting portion 82 is closer to the valve port portion 11 than the second suspension portion 71, the first supporting portion 61 can abut against the first suspension portion, the second supporting portion 82 can abut against the second suspension portion 71, and the lead screw 60 can carry the valve needle 70 with the suspension 80 to move away from the valve port portion 11. The application provides an electronic expansion valve structure, through the optimal design to needle lead screw subassembly structure, when electronic expansion valve actuates, needle 70 can become to lead by oneself and carry out sliding fit with valve body part 10 as an independent spare part relatively, the influence of being moved by the lead screw has significantly reduced, when the lead screw because of machining tolerance perhaps actuates when taking place the incline relative valve port 110, needle 70 receives the skew influence of lead screw less and takes place the condition that the incline takes place relative valve port 110, can guarantee the axiality of needle 70 and valve port 110, guarantee that the valve actuates the reliability.

It should be noted that the guide portion of the valve body member described in the present application may mean that the valve body member includes one guide wire segment capable of cooperating with the valve needle, and does not require a complete solid guide portion existing on the inner peripheral portion of the valve body member.

Referring to a first embodiment of the electronic expansion valve provided in the present application, as shown in fig. 1-3, the electronic expansion valve includes a valve body 10, a connecting seat 20, and a housing 30, the connecting seat 20 is fixedly connected to the valve body 10, the housing 30 is fixedly connected to the connecting seat 20, the connecting seat 20 can be integrally formed with the valve body 10, the connecting seat 20, and the housing 30 substantially define a valve cavity of the electronic expansion valve, the valve cavity accommodates a rotor component 40, a partial nut component 50, and a partial screw needle assembly a, the rotor component 40 includes a rotor 41 and a rotor seat 42, the rotor 41 and the rotor seat 42 are integrally injection-molded, the screw 60 includes a screw thread portion, a first supporting portion 61, and a screw abutting portion 63, the screw 60 rotates with the rotor 41, the screw abutting portion 63 is located above the screw thread portion, the first supporting portion 61 is located below the screw thread portion, the screw abutting portion 63 is substantially in a smooth section structure, the end of the screw abutting portion 63 can be arranged in a spherical structure to abut against the housing 30, the screw abutting portion 63 can be in sliding fit with the rotor seat 42, the rotor seat 42 plays a guiding role for the screw abutting portion 63, and when the valve needle 70 abuts against the valve port 11, the screw abutting portion 63 is relatively far away from the housing 30; when the valve port 110 is fully opened, the screw abutting portion 63 abuts against the housing 30.

The nut member 50 includes a nut body 51 and a connecting portion 52, the nut body 51 has a nut screw portion 53, the nut screw portion 53 is screwed with the lead screw, the lead screw portion of the lead screw 60 and the nut screw portion 53 of the nut are always in a full-tooth screwing state in both an open valve state and a closed valve state, teeth of a part of the lead screw portion are meshed with the nut screw portion 53 in the full-open valve state, teeth of another part of the lead screw portion are positioned above the nut screw portion 53, teeth of the other part of the lead screw portion are positioned below the nut screw portion 53, wear of the lead screw on the teeth of the nut member 50 in an actuating process can be relatively reduced, service lives of parts can be prolonged, the nut member 50 can be an injection molding piece, the nut body 51 is a plastic piece, the connecting portion 52 is a metal material, the nut body 51 and the connecting portion 52 are insert-molded, the connecting portion 52 is fixedly connected with the valve body member 10, and the nut member 50 is integrally fixed to the valve body member 10, or the whole nut member 50 can be formed by metal material, the nut member 50 is directly fixed with the valve body member 10, the nut 50 has a nut guide hole, and further includes a nut guide portion 54, the nut guide portion 54 is located under the nut screw portion 53, the inner diameter of the nut guide hole is larger than that of the nut screw portion, the nut guide portion is roughly in a smooth segment structure, the suspension member 80 can be located in the nut guide hole, the suspension member 80 can be in sliding guide fit with the nut guide portion 54 or the suspension member 80 can also be in clearance fit with the nut guide portion 54, the valve needle 70 is in sliding fit with the guide portion 13, or a part of the valve needle can also extend into the nut guide hole to be in sliding guide fit or clearance fit with the nut guide portion 54, and when the valve opening is required, the lead screw 60 can move upwards along the axial direction of the valve needle 70 by the suspension member 80 to gradually move away from the valve port 110 through the excitation of the coil member, when valve closing is required, the screw 60, the valve needle 70 and the suspension member 80 move together axially and downwardly, and the valve needle 70 can approach or separate from the valve port 110 to regulate the flow of refrigerant flowing through the valve port, it should be noted that the nut guide 54 stated in this application refers to a nut body including a guide section capable of cooperating with the suspension member or the screw or the valve needle, and does not need a complete solid guide existing in the nut body.

As shown in fig. 4-6, the screw valve needle assembly a includes a screw 60, a valve needle 70 and a suspension member 80, the screw 60 includes a first support portion 61, the first support portion 61 includes at least a protrusion extending radially from a position of the screw 60 close to the valve port 11, the first support portion 61 may form a substantially vertical intersection with the screw 60 or an included angle between the first support portion 61 and the screw 60 and is entirely inclined, only the first support portion is required to be abutted against the suspension member 80 to realize suspension connection, a first suspension portion 81 of the suspension member 80 is substantially an extension protrusion extending radially from an upper end of the suspension member 80 toward a central axis of the suspension member in a direction away from the valve port, the first support portion 61 may be integrated with the screw 60 or may be separately disposed, the first support portion 61 may be formed as a separate part and then fixedly connected or limited to the screw 60, for example, the first supporting portion 61 may be a structure such as a retaining ring or a snap spring, the lead screw is provided with a groove for correspondingly installing the retaining ring or the snap spring to realize the limit connection of the retaining ring or the snap spring and the lead screw 60, and the retaining ring or the snap spring can be welded and fixed after the limit connection, or the first supporting portion 61 may also be provided with a bolt structure, the lead screw 60 is provided with an installation hole structure, a bolt is inserted into the installation hole to realize the limit connection with the lead screw 60, and the suspension member 80 can also realize the abutment with the lead screw 60, when the first supporting portion 61 is separately arranged with the lead screw 60, the suspension member 80 and the lead screw 60 can realize indirect abutment through the structures such as the retaining ring or the snap spring or the bolt, the suspension member 80 is roughly in an arc-cylindrical structure with openings at the upper and the lower part, the side wall of the suspension member 80 is provided with a notch, and comprises a first suspension portion 81 and a second supporting portion 82, and the first suspension portion 81 and the second supporting portion 82 are both extended walls extending towards the central axis of the suspension member 80 along the radial direction, further comprising a boss portion 85, the boss portion 85 having a boss end surface 851, the boss portion 85 being located between a first hanging portion 81 and a second hanging portion 82, the boss portion 85 projecting in a radial direction extending toward a center axis of the hanger 80, the hanger 80 having a first receiving groove 83 and a second receiving groove 84, the first hanging portion 81 and the boss portion 85 substantially defining the first receiving groove 83, the second hanging portion 82 and the boss portion 85 substantially defining the second receiving groove 84, the first receiving groove 83 being formed with a first notch 831 formed toward a notch of a side wall of the hanger 80, the second receiving groove 84 being formed with a second notch 841 formed toward a notch of a side wall of the hanger 80, the valve needle 70 comprising the second hanging portion 71, the second hanging portion 71 being formed integrally with the valve needle 70 or separately, the second hanging portion 71 being formed as a separate part and fixedly connected or position-limited connected to the valve needle 70, as referred to the arrangement of the first hanging portion 61, the second suspension portion 71 comprises at least a protrusion extending in a radial direction from a position of the valve needle 70 away from the valve port 11, the second suspension portion 71 can form a substantially vertical intersection with the valve needle 70 or the second suspension portion 71 and the valve needle 70 have an included angle and an overall inclined configuration, only the second suspension portion 71 can be ensured to abut against the suspension member 80, for example, the second suspension portion 71 can be a retaining ring, a snap spring, a latch or the like to achieve a fixed connection or a limited connection with the valve needle 70, the second support portion 82 is substantially an extension protrusion extending in a radial direction from a lower end portion of the suspension member toward a central axis of the suspension member in a direction close to the valve port 11, the screw 60 is inserted into the first receiving groove 83, the first support portion 61 is inserted into the first receiving groove 83 through the first notch 831 in a substantially radial direction, the valve needle 70 is inserted into the second receiving groove 84, the second suspension portion 71 is inserted into the second receiving groove 84 through the second notch 841 in a substantially radial direction, the first supporting portion 61 abuts against the first suspension portion 81, the second supporting portion 82 abuts against the second suspension portion 71, the suspension member 80 abuts against the screw rod 60, and the suspension member 80 abuts against the valve needle 70, it should be noted that the abutment stated in this application includes the case of direct abutment between two parts, and also includes the case of indirect abutment between two parts by additionally adding another part, it should be noted that the valve needle, the screw rod or the suspension member stated in this application may be an integrated structure formed by lathing, or a valve needle assembly formed by separately arranging and assembling several parts, or a screw rod assembly, or a suspension member assembly, such as a suspension member body, a first suspension portion and a first supporting portion, may be separately arranged and processed to form a valve needle suspension member assembly, through an optimized design of the structure of the valve needle suspension member, the suspension part realizes direct or indirect offset with the screw rod, the suspension part realizes direct or indirect offset suspension support connection with the valve needle, when the electronic expansion valve is actuated, the valve needle 70 can be self-guided and in sliding fit with the valve body part 10 as an independent part relatively, the influence of the actuation of the screw rod 60 is greatly reduced, when the screw rod deflects relative to the valve port 110 due to machining tolerance or actuation, the valve needle 70 is less influenced by the deflection of the screw rod and deflects relative to the valve port 110, the coaxiality of the valve needle 70 and the valve port 110 can be ensured, the valve actuation reliability is ensured, through the optimized design of the structure of the electronic expansion valve, the nut part 50 is generally positioned at the outer periphery of the screw rod valve needle component A and is approximately limited in a nut guide hole, and when the screw rod, the valve needle and the suspension part are assembled, the screw rod can extend into the first accommodating groove through the first notch in at least one radial direction, the valve needle can extend into the second accommodating groove through the second notch in at least one radial direction, the screw rod and the valve needle do not need to be assembled with the suspension part in the forward direction or the reverse direction from the axial direction of the suspension part, after the suspension part 80 is assembled with the screw rod 60 and the valve needle 70, the suspension part 80, a part of the screw rod and a part of the valve needle are roughly limited in the nut guide hole, and the screw rod or the valve needle cannot be separated from the suspension part.

The screw rod valve needle assembly a has an accommodating cavity a1, the screw rod 60, the valve needle 70 and the suspension member 80 approximately define an accommodating cavity a1, specifically, the first supporting portion 61, the boss portion 85 and the second suspension portion 71 approximately define an accommodating cavity a1, the electronic expansion valve further includes a rolling member 90, the rolling member 90 may be a steel ball, a portion of the steel ball is located in the accommodating cavity a1, and the steel ball 90 is located at a position higher than the boss end surface 851 so as to be capable of abutting against the screw rod 60, the boss portion 85 limits the radial position of the steel ball 90 to a certain extent to prevent the steel ball from rolling in the radial direction, the steel ball 90 is capable of freely rotating in the accommodating cavity a1, and the steel ball 90 abuts against the valve needle 70.

The operation principle provided by the present application will be briefly described below, wherein the rotor 41 rotates, the rotor seat 42 and the screw 60 also rotate synchronously, the screw 60, the valve needle 70 and the suspension 80 move axially downward together through the screw and nut screw cooperation, the valve needle 70 gradually approaches the valve port 110, when the valve needle 70 is not abutted against the valve port 11, a gap L1 is formed between the screw 60 and the steel ball 90, the first supporting portion 61 abuts against the first suspension portion 81, the second supporting portion 82 abuts against the second suspension portion 71, because the screw 60 can continue to move downward due to the existence of the gap L1, when the first supporting portion 61 of the screw 60 abuts against the steel ball 90, the valve needle 70 is abutted against the valve port 11 downward by the driving force of the screw 60 and is in an abutting state, at this time, the gap L1 between the screw 60 and the screw 90 is transferred between the second supporting portion 82 and the second suspension portion 71, a gap L1' is provided between the second support portion 82 and the second hanging portion 71.

The screw 60 is no longer displaced downwards due to the reverse acting force of the steel ball 90, the valve needle 70 is in a butting state with the valve port 11 under the driving force of the screw 60 to form a lower stopping structure of the electronic expansion valve, when the steel ball 90 butts against the first supporting part 61, the valve needle 70 butts against the valve port 11 under the driving force of the screw 60 and is in a butting state, suspension support connection is realized by respectively butting a suspension part with the screw and the valve needle through the optimized arrangement of a screw needle assembly structure of the electronic expansion valve, the screw 60 and the valve needle 70 are related through the rolling part steel ball 90, and the screw 60 butts against the steel ball 90 during actuation, the screw 60 and the steel ball 90 form a point contact structure approximately, so that the acting force applied to the valve needle 70 is reduced even if the screw 60 rotates, the torsion transmitted downwards during the rotation of the screw is reduced, and the influence of the valve needle deflection of the screw is reduced, the steel ball 90 can roll in the accommodating part, the phenomena of heating, dry friction and the like caused by long-term stress at the same point are reduced, the friction force is greatly reduced, the abrasion of the valve needle 70 to the valve port 110 caused by rotation of the screw rod 60 is reduced, the loss in the downward transmission process of the driving force is reduced, the suspension support connection is realized through the propping of a suspension part and the screw rod, the suspension support connection is realized through the propping of the suspension part and the valve needle, part of the valve needle 70 is in sliding fit with the valve body part 10, the valve needle can freely move in a certain gap after the suspension part 80 is assembled, the influence of the assembly accumulative coaxiality and the like of the screw rod 60, the nut 50 and other parts is small, the sealing effect with the valve port part 11 is good, the gap between the steel ball 90 and the screw rod is small, the deviation of the valve opening pulse is very small, and the integral flow deviation of the electronic expansion valve is small.

Fig. 7-10 are diagrams illustrating a second embodiment of an electronic expansion valve structure provided in the present application, which is different from the first embodiment in terms of a suspension structure and a manner of assembling a suspension with a lead screw and a valve needle, as shown in fig. 7, a suspension 80 'is substantially a bottomed sleeve portion structure, the sleeve portion 80' has a cylindrical cavity, an upper end of the sleeve portion has an opening 81', the sleeve portion 80' further includes a bottom wall and a cylindrical wall, the bottom wall has a through hole 83', the cylindrical wall has a notch groove 82', and the sleeve portion 80 'includes a first suspending portion 84' and a second suspending portion 85', and the bottom wall substantially forms a first suspending portion 84'. The second suspending portion 85 'extends and protrudes substantially in the radial direction toward the central axis of the sleeve portion 80', as shown in fig. 8, a sleeve portion 80' is provided on the outer peripheral portion of the screw 60 from above and below, the screw 60 is extended from the sleeve portion 80' through an opening 81', the needle 70 is extended into the cylinder cavity from the notch 82' along the radial direction, the first suspending portion 84' abuts against the first supporting portion 61, the second suspending portion 85' abuts against the second suspending portion 71, as shown in fig. 10, the sleeve portion 80 'is fitted to the outer peripheral portion of the valve needle 70 from below and from above, the valve needle 70 is projected from the sleeve portion through the opening 81', and the screw rod 60 extends into the cylinder cavity from the notch groove 82' along the radial direction, the first suspension part 84' abuts against the second suspension part 71', the second suspension part 85' abuts against the first supporting part 61, the suspension part 80' and the screw rod 60 are directly or indirectly abutted to realize suspension and support connection, and suspension support connection of the suspension element 80' against the valve needle 70, either directly or indirectly. The needle 71 is provided with a needle receiving groove 711, the needle receiving groove 711 is recessed from the end surface of the second hanging portion, a part of the steel ball 90 is located in the needle receiving groove 711, or the screw rod 60 is provided with a screw rod accommodating groove 611, the screw rod accommodating groove 611 is inwards recessed from the first supporting part 61, part of the steel ball 90 is positioned in the screw rod accommodating groove 611, the screw rod 60 can be riveted and deformed by an additionally-arranged structure to clamp the steel ball 90 and prevent the steel ball 90 from separating from the screw rod 60, grease can be added into the screw rod accommodating groove 611 or the valve needle accommodating groove 711, and by utilizing the viscosity of the grease, during the operation of the electronic expansion valve, the hidden trouble of noise caused by the movement of the steel ball 90 can be reduced by the adhesion of grease, when the valve needle 70 is not abutted against the valve port 11, a gap is formed between the screw rod 60 and the steel ball 90, when the screw rod 60 abuts against the steel ball 90, the valve needle 70 abuts against the valve port 11, and a gap between the screw rod 60 and the steel ball 90 is transferred between the second suspension portion 71 and the second suspension portion 85'; or when the valve needle 70 is not abutted against the valve port 11, a gap L1 is formed between the steel ball 90 and the valve needle 70, when the valve needle 70 is abutted against the steel ball 90, the valve needle 70 is abutted against the valve port 11, and the gap between the valve needle 70 and the steel ball 90 is transferred between the second suspension portion 71 and the second suspension portion 85', and the related operation principle and the realized technical effect are described in detail in the first embodiment and are not repeated. The sleeve portion 80 'is sleeved on the screw rod 60 and then fixedly connected to the screw rod 60 by welding, and the valve needle 70 is extended into the cylinder cavity from the notch 82' along the radial direction, or the sleeve portion 80 'is sleeved on the valve needle 70 and then fixedly connected to the valve needle 70 by welding, and the screw rod 60 is extended into the cylinder cavity from the notch 82' along the radial direction, and by this arrangement, the suspension member 80 'is fixedly connected to the screw rod 60, and the suspension member 80' can abut against the valve needle 70 to realize suspension and support connection, and the technical effects of the electronic expansion valve provided by the present application can be achieved as well, or the first suspension portion 84 'of the sleeve portion 80' is provided with a clamping protrusion or a clamping portion, the peripheral wall of the first support portion 61 of the screw rod 60 is provided with a corresponding clamping protrusion or clamping portion, and both are clamped and limited, by this arrangement, the suspension member 80 'is fixedly connected to the valve needle 70, and the suspension member 80' can abut against the screw rod 60 to realize suspension and support connection, the technical effect of the electronic expansion valve provided by the application can be achieved.

A third embodiment provided by the present application is described below with reference to fig. 11 to 12, and differs from the first and second embodiments in the manner of connecting the suspension member to the lead screw and the valve needle, the suspension member 80 is integrally injection-molded on the lead screw 60, the suspension member 80 is insert-molded with the lead screw 60, the valve needle 70 radially extends from the second notch 841 into the second receiving groove 84, the second suspension portion 71 abuts against the second support portion 82, and in at least one radial direction, the valve needle 70 and the suspension member 80 are not provided with a structure capable of preventing the valve needle and the suspension member from being detached from each other, the manner of connecting the valve needle and the suspension member is convenient and reliable, and the assembling method is convenient. The steel ball 90 is located in the accommodating portion a1, and the steel ball 90 abuts against the valve needle, this arrangement enables the suspension member 80 to achieve a fixed connection with the screw rod, and the suspension member 80 makes a suspension support connection with the screw rod directly or indirectly abutting against the screw rod, and the related actuation principle and technical effects are stated and will not be described in detail herein.

A fourth embodiment provided by the present application is described below with reference to fig. 13-14, in which the suspension member 80 is integrally injection-molded on the valve needle 70, the suspension member 80 is insert-molded with the valve needle 70, the lead screw 60 radially extends into the first accommodating groove 83 from the first notch 831, the first suspension portion 81 abuts against the first supporting portion 61, in at least one radial direction, the lead screw 60 and the suspension member 80 are not provided with a structure capable of preventing the lead screw and the suspension member from being separated from each other, the connection manner of the lead screw and the suspension member is convenient and reliable, and the assembling method is convenient. The steel ball 90 is located in the accommodating portion a1 and the steel ball 90 abuts against the valve needle, when the valve needle 70 does not abut against the valve port 11, a gap L1 is formed between the screw rod 60 and the steel ball 90, when the screw rod 60 abuts against the steel ball 90, the valve needle 70 abuts against the valve port 11, the gap L1 between the screw rod and the steel ball is transferred between the first supporting portion 61 and the first hanging portion 81, a gap L1' is formed between the first supporting portion 61 and the first hanging portion 81, the arrangement enables the hanging piece 80 to be fixedly connected with the valve needle, and the hanging piece 80 is directly or indirectly abutted against the screw rod to be connected with the hanging piece in a hanging and supporting manner.

A fifth embodiment provided by the present application is described in conjunction with fig. 15-16, which is different from the first embodiment in the structure and arrangement of the rolling member 90, the lead screw-valve needle assembly includes a suspension member 80', a lead screw 60' and a valve needle 70', the suspension member 80' is capable of supporting against the lead screw 60' and the suspension member 80' is capable of supporting against the valve needle 70', the suspension member 80' is substantially provided with an opening at the upper and lower sides, the side wall has an arc-shaped sleeve structure with a notched groove, and a first suspension portion 81A and a second suspension portion 82A are provided, the lead screw 60' includes a first support portion 61' and a lead screw fitting portion 62', the lead screw fitting portion 62' is located below the first support portion 61', the valve needle 70' includes a first abutting portion 90', the first abutting portion 90' can be integrally formed with the valve needle 70', the first abutting portion 90' is substantially in a hemispherical portion protruding upwards from the second suspension portion 71', alternatively, the first abutting portion 90 'may be an arc-shaped portion or a pointed portion as long as it can abut against the screw rod 60, the first abutting portion 90' may be separately provided from the valve needle 70 and connected by adhesion, limit connection or fixed connection, when the valve needle 70 does not abut against the valve port portion 11, a gap L1 is formed between the screw rod engaging portion 62 'and the first abutting portion 90', when the screw rod engaging portion 62 'abuts against the first abutting portion 90', the valve needle 70 abuts against the valve port portion 11, the gap L1 between the screw rod and the first abutting portion 90 'is transferred between the second suspension portion 71' and the second supporting portion 82A, and a gap L1 'is formed between the second suspension portion 71' and the second supporting portion 82A.

A sixth embodiment of the present invention will be described with reference to fig. 17, which is different from the first embodiment in the structure and arrangement of the rolling element 90, the spindle-valve needle assembly includes a suspension member 80', a spindle 60' and a valve needle 70', the suspension member 80' is capable of abutting against the spindle 60' to realize suspension connection, the suspension member 80' is capable of abutting against the valve needle 70' to realize suspension connection, the suspension member 80' is substantially in an arc-shaped sleeve structure with an opening at the upper and lower sides, a first suspension portion 81A and a second suspension portion 82A are provided, the spindle 60' includes a first support portion 61' and a spindle engaging portion 62', the spindle engaging portion 62' is located below the first support portion 61', the spindle 60' further includes a second abutting portion 90', the second abutting portion 90' is substantially in a hemispherical portion protruding downwards from the spindle engaging portion 62', the second abutting portion 90' may be integrally formed with the spindle 60', like the first abutting portion, the second abutting portion 90' may also be an arc-shaped portion or a pointed portion as long as it can abut against the valve needle 70, the related operation principle refers to the fifth embodiment, and the detailed description of the related operation principle and the technical effects are omitted for brevity

A seventh embodiment provided by the present application will be described with reference to fig. 18 to 19, which is different from the third embodiment in the structure and the arrangement position of the rolling member 90, the lead screw-needle assembly a includes the lead screw 60, the suspension member 80 and the needle 70', the suspension member 80 is insert-molded with the lead screw 60, the needle 70' includes the second suspension portion 71' and the first abutment portion 90', the first abutment portion 90' may be provided as an integral structure with the needle 70', the first abutment portion 90' is substantially a hemispherical portion protruding upward from the second suspension portion 71', or the first abutment portion 90' may be an arc-shaped portion or a pointed portion, as long as the first abutment portion can abut against the lead screw 60, the first abutment portion 90' may be provided as a separate body with the needle 70 and connected by an adhesive connection, a spacing connection or a fixed connection, when the needle 70 does not abut against the valve port portion 11, a gap L1 exists between the lead screw 60 and the first abutment portion 90', when the screw rod abuts against the first abutting portion 90', the valve needle 70 abuts against the valve port portion 11, and a gap L1 between the screw rod and the first abutting portion 90' is transferred between the second hanging portion 71' and the second supporting portion 82, and a gap L1' is formed between the second hanging portion 71' and the second supporting portion 82.

An eighth embodiment provided by the present application will be described with reference to fig. 20, which is different from the fourth embodiment in the structure and arrangement position of the rolling member 90, the screw-needle assembly a includes a screw 60, a suspension member 80 and a needle 70', the suspension member 80 is insert-molded with the needle 70, the needle 70' is provided with a first abutment portion 90', the first abutment portion 90' is substantially a hemispherical portion in which the needle 70' protrudes upward, the suspension member 80 is fixedly connected with the needle 70, the suspension member 80 is in suspension-support connection with the screw 60, when the needle 70 is not in contact with the valve port portion 11, the first abutment portion 90' has a gap L1 with the screw 60, the first abutment portion 61 is in contact with the first suspension portion 81, when the first abutment portion 90' is in contact with the screw 60, the gap L1 between the first abutment portion 90' and the screw 60 is transferred to the gap L1' between the first abutment portion 61 and the first suspension portion 81, the detailed description of the related operation principle and the technical effects are not repeated herein.

A ninth embodiment provided by the present application is described below with reference to fig. 21, and is different from the eighth embodiment in that the lead screw 60 'is provided with a second abutting portion 90', the lead screw 60 'includes a first supporting portion 61', the second abutting portion 90 'is substantially a hemispherical portion extending downward from the first supporting portion 61', the suspension member 80 is fixedly connected to the valve needle 70, the suspension member 80 can be in suspension support connection with the lead screw 60, when the second abutting portion 90 'abuts against the valve needle 70, a gap L1 between the second abutting portion 90' and the valve needle 70 is transferred to a gap L1 'formed between the first supporting portion 61' and the first suspending portion 81, and the detailed description of the relevant operation principle and technical effects is omitted here.

A tenth embodiment provided by the present application will be described with reference to fig. 22, which is different from the second embodiment in that, in the structure and the arrangement position of the rolling elements, a hanger 80 'can abut against the screw rod 60 to realize suspension connection, and a hanger 80' can abut against the valve needle 70 to realize suspension connection, the hanger 80 'is sleeved on the outer circumferential portion of the screw rod 60, the valve needle 70' includes a second suspension portion 71 'and a first abutting portion, the first abutting portion 90' is substantially a hemispherical portion protruding upward from the second suspension portion 71', and the first abutting portion 90' can abut against the screw rod 60; the screw 60' includes a first support portion and a second abutting portion, the second abutting portion is a substantially hemispherical portion protruding downward from the first support portion, the first abutting portion 90' may be provided as an integral structure with the needle 70', the first abutting portion 90' is a substantially hemispherical portion protruding upward from the second hanging portion 71', or the first abutting portion 90 'may be an arc-shaped portion or a pointed portion as long as it can abut against the screw rod 60, the first abutting portion 90' may be separately provided from the valve needle 70 and connected by adhesion, limit connection or fixed connection, the second abutting portion may be integrally or separately provided from the screw rod, or the second abutting portion may also be an arc-shaped portion or a pointed portion, as long as the second abutting portion can abut against the valve needle 70, and the detailed operation principle and technical effects thereof have been described in the second embodiment and are not repeated herein.

An eleventh embodiment provided by the present application is described below with reference to fig. 23, which is different from the tenth embodiment in that in the present embodiment, the suspension member 80' is sleeved on the outer peripheral portion of the needle 70', the needle 70' includes a first abutting portion 90', and the first abutting portion 90' can abut against the screw 60; alternatively, the screw 60' includes a second contact portion that can contact the needle 70, the first support portion 61' contacts the second suspending portion 85', and the second suspending portion 71' contacts the first suspending portion 84 '.

It should be noted that the valve needle may include the first abutting portion, and the screw rod may include the second abutting portion, when the valve needle is not abutted against the valve port portion, the first abutting portion and the second abutting portion have a gap, and the screw rod is abutted against the suspension member; when the first abutting part abuts against the second abutting part, the valve needle abuts against the valve port part, and a gap is formed between the screw rod and the suspension part.

A twelfth embodiment of the electronic expansion valve according to the present application is described below with reference to fig. 24-25, which is different from the previous embodiments in that the electronic expansion valve according to the present application may have a unidirectional flow structure in which the refrigerant enters from the cross connection pipe to flow to the vertical connection pipe through the valve port 110, a steel ball structure, a first abutting portion, or a second abutting portion is not provided between the screw and the valve needle in the present embodiment, the screw 60' includes a first supporting portion 61' and a screw fitting portion 62', the suspension 80A includes a first suspension portion 81A and a second supporting portion 82A, the valve needle 70 includes a second suspension portion 71, a sidewall of the suspension 80A is provided with a notch groove, the screw 60' extends into the suspension 80A through the notch groove in a substantially radial direction, the valve needle 70 extends into the suspension 80A through the notch groove in a substantially radial direction, the first suspension portion 81A can abut against the first supporting portion 61', the second support portion 82A can abut against the second hanging portion 71, and when the needle does not abut against the valve port portion, the first hanging portion 81A abuts against the first support portion 61', and the second support portion 82A abuts against the second hanging portion 71; when the valve needle abuts against the valve port, a gap L2 is formed between the second support 82A and the second suspension portion 71, a gap L3 is formed between the screw rod engagement portion 62 'of the screw rod 60 and the second suspension portion 71 to prevent the contact interference between the screw rod and the valve needle from generating a large friction force, when the valve is in a valve closing state, the valve needle 70 is used as a separate part, and does not interfere with the suspension or the screw rod, and is less influenced by the screw rod, the valve needle 70 can maintain the coaxiality with the valve port 11 in the centering manner with the valve port 11 by the guiding function provided by the guide portion 13 of the valve body 10, and the valve needle 70 abuts against the valve port 11 by the self weight, and the rotation and downward movement of the screw rod 60' by the excitation of the coil may transmit more torsion force to the valve needle than the structure provided with the steel ball, but can still realize smooth valve closing.

A thirteenth embodiment of the electronic expansion valve according to the present application will be described with reference to fig. 26 to 27, which is not provided with a steel ball or a first abutting portion or a second abutting portion, and differs from the twelfth embodiment in that the suspension 80 and the lead screw 60 are fixed or limited by insert molding or welding, and when the valve needle is not abutted against the valve port portion, the second support portion 82 is abutted against the second suspension portion 71; when the valve needle abuts against the valve port portion, a gap L2 is formed between the second support portion and the second suspension portion, and a gap L3 is formed between the second suspension portion and the lead screw 60, so that the valve can be closed by the gravity of the valve needle, and related technical effects are stated in detail in the twelfth embodiment and are not described again;

a fourteenth embodiment of the electronic expansion valve according to the present application is described below with reference to fig. 28, and the present embodiment is not provided with a steel ball or a first abutting portion or a second abutting portion, and is different from the twelfth embodiment in that the suspension member 80 and the valve needle 70 are in an insert-molded or welded fixed connection or a limit connection structure, and when the valve needle is not abutted against the valve port portion, the first supporting portion 61 is abutted against the first suspending portion 81; when the valve needle abuts against the valve port portion, a gap L2 is formed between the first supporting portion 61 and the first hanging portion 81, and a gap L3 is formed between the first supporting portion 61 and the valve needle 70, in this embodiment, the valve needle 70 can also close the valve by the gravity of the valve needle, and related technical effects are stated in detail in the twelfth embodiment and are not described again;

the application provides an electronic expansion valve, including a valve body component 10, a nut component 50, a feed screw needle component A, a nut 50 can be fixedly connected with the valve body component 10, the feed screw needle component A includes a feed screw 60, a needle 70 and a hanger 80, the feed screw 60 is in threaded fit with the nut 50, the feed screw 60 includes a feed screw threaded portion, the nut 50 includes a nut threaded portion 53 and a nut guide portion 54, the feed screw threaded portion is in threaded fit with the nut threaded portion 53, the nut guide portion 54 has a nut guide hole, part of the feed screw 60 is located in the nut guide hole, the hanger 80 can be in sliding guide fit with the nut guide portion 54 of the nut 50 or the hanger 80 can be in clearance fit with the nut guide portion 54, the needle 70 is in sliding fit with the guide portion 13, the needle 70 is adapted with the guide hole 131 and the needle 70 can perform axial lifting motion in the guide hole 131, the valve needle 70 can approach or be far away from the valve port part 11, the suspension part 80 is fixedly connected or in a limiting connection with the valve needle 70, the screw rod 60 comprises a first supporting part 61, the suspension part 80 comprises a first suspension part 81, the first supporting part 61 is closer to the valve port part 11 relative to the first suspension part 81 so as to be capable of supporting the first suspension part, and the first supporting part 61 can be abutted against the first suspension part 81; or the suspension member 80 is fixedly or in limited connection with the screw rod 60, the suspension member 80 comprises a second support portion 82, the valve needle 70 comprises a second suspension portion 71, the second support portion 82 is closer to the valve port portion 11 relative to the second suspension portion 71 so as to be capable of supporting the second suspension portion, and the second support portion 82 can be abutted against the second suspension portion 71; or the lead screw 60 includes the first supporting portion 61, the suspension 80 includes a first suspension portion 81 and a second supporting portion 82, the valve needle 70 includes a second suspension portion 71, the first supporting portion 61 is closer to the valve port portion 11 than the first suspension portion 81, the second supporting portion 82 is closer to the valve port portion 11 than the second suspension portion 71, the first supporting portion 61 can abut against the first suspension portion, the second supporting portion 82 can abut against the second suspension portion 71, and the lead screw 60 can carry the valve needle 70 with the suspension 80 to move away from the valve port portion 11. The application provides an electronic expansion valve structure, through the optimal design to needle lead screw subassembly structure, when electronic expansion valve actuates, needle 70 can become to lead by oneself and carry out sliding fit with valve body part 10 as an independent spare part relatively, the influence of being moved by the lead screw has significantly reduced, when the lead screw because of machining tolerance perhaps actuates when taking place the incline relative valve port 110, needle 70 receives the skew influence of lead screw less and takes place the condition that the incline takes place relative valve port 110, can guarantee the axiality of needle 70 and valve port 110, guarantee that the valve actuates the reliability.

It should be noted that the ordinal numbers of "first" and "second" and the directional terms of "upper" and "lower" are set forth in the specification and drawings, respectively, and are not intended to limit the structure or sequence of the components.

The present invention has been described in terms of specific embodiments, which are merely illustrative of the principles and concepts that can be employed to facilitate an understanding of the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.