CN208458323U

CN208458323U - Electric expansion valve

Info

Publication number: CN208458323U
Application number: CN201820188795.7U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Current assignee: Zhejiang Sanhua Intelligent Controls Co Ltd
Priority date: 2017-10-24
Filing date: 2018-02-02
Publication date: 2019-02-01
Anticipated expiration: 2028-02-02

Abstract

A kind of electric expansion valve, valve component, valve component include valve seat, and valve seat is formed with valve chamber and valve port；Casing assembly, including the cover and shell, the cover are fixedly connected with valve seat, and shell is fixedly connected with the cover；Needle screw component, including screw rod, sleeve and needle, screw rod carry out floating connection by sleeve and needle；Nut assembly, including nut body, connection sheet and nut guide part, nut body is with screw rod by being threadedly engaged, it further include guide member, guide member includes the first guide portion and the second guide portion, the second guide portion and nut guide part secure fit, first guide portion provides guiding to needle, first guide portion and the second guide portion provide guiding to sleeve simultaneously, and electronic expansion valve structure provided by the utility model can ensure that the concentricity of each components, to prevent abrasion of the needle to valve port.

Description

Electric expansion valve

Technical field

The utility model relates to fluid control component technical field, in particular to a kind of electric expansion valve.

Background technique

In cooling and warming technical field, electric expansion valve is the cold medium flux control unit of heating-cooling equipment, work Process is general are as follows: and with the energization or power-off of the coil device as stator, the magnetic rotor component as rotor is driven to rotate, with Magnet rotor is fixedly connected and the screw rod for following magnet rotor to rotate drives valve needle movements, is provided with nut part in electric expansion valve, Nut part is provided with internal thread structure, correspondingly, external thread structure is provided on screw rod, by the cooperation of screw thread pair, Screw rod is set also needle to be driven to make elevating movement while rotating, in a manner of adjusting the aperture between needle and valve port The flow for the refrigerant for flowing through valve port is adjusted, to realize system function and achieve the purpose that accurately to control.

Electric expansion valve in refrigeration systems in use, the pressure of vibration and the refrigerant pulse of compressor, can to needle or Screw rod brings certain impact；Affect the concentricity between each component, needle deflection, thus cause screw thread pair abrasion and The abrasion at valve port position, and while above-mentioned abrasion also a kind of pair of needle reality how can be designed along with the generation of noise, therefore While existing effect is oriented to, the electronic expansion valve structure that component causes inordinate wear because of deflection can be reduced, is art technology Personnel's technical problem urgently to be resolved.

Utility model content

The technical problems to be solved in the utility model is to provide a kind of electric expansion valve, which can be to needle Screw component provides good guiding, so that it is guaranteed that nut assembly, needle screw component and valve port are carried out in electric expansion valve It keeps coaxial when actuation, prevents abrasion of the needle to valve port position, for this purpose, the utility model uses following technical scheme:

A kind of electric expansion valve, including valve component, valve component include valve seat, and valve seat is formed with valve chamber and valve port；Outside Shell component, including the cover and shell, the cover are fixedly connected with valve seat, and shell is fixedly connected with the cover；Needle screw component, including Screw rod, sleeve and needle, screw rod carry out floating connection by sleeve and needle；Nut assembly, including nut body, connection sheet And nut guide part, nut body, by being threadedly engaged, further include guide member, guide member includes the first guidance with screw rod Portion and the second guide portion, the second guide portion and nut guide part secure fit, the first guide portion provide guiding to needle, and first draws It leads portion and the second guide portion provides guiding to sleeve simultaneously.

Valve seat is provided with valve seat inner hole and protrusion.

First guide portion is equipped with guide hole, and needle passes through guide hole and protrudes into valve chamber, the first guidance

Portion provides guiding to needle.

First guide portion includes the first inner edge portion, and the first inner edge portion is matched with the outer wall of sleeve.

Second guide portion includes the second inner edge portion, third outer edge and the second leading end, the

Two inner edge portions are matched with the outer wall of sleeve, the inner wall of third outer edge and nut guide part

Match fixation.

The outer diameter of second leading end and the internal diameter of valve seat inner hole match.

First guide portion further includes the first outer edge, the second outer edge and the first leading end,

Be formed with first step portion between first outer edge and the second outer edge, first step portion with

Protrusion contacts.

Second step portion, second step portion are formed between second outer edge and the first leading end

It is contacted with the second leading end.

The outer diameter of second outer edge and the internal diameter of valve seat inner hole match.

Detailed description of the invention

Fig. 1 is electronic expansion valve structure schematic views provided by the utility model；

Fig. 2 is the first guide portion structure enlargement diagram provided by the utility model；

Fig. 3 is electric expansion valve valve seat construction schematic diagram provided by the utility model；

Fig. 4 is the second guide portion structure enlargement diagram provided by the utility model.

Specific embodiment

In order to make those skilled in the art more fully understand the technical solution of the utility model, with reference to the accompanying drawing and have The utility model is described in further detail for body embodiment.

Fig. 1 and Fig. 3 are please referred to, Fig. 1 is that a kind of structure of specific embodiment of electric expansion valve provided by the utility model is shown It is intended to, Fig. 3 is electric expansion valve valve seat construction schematic diagram provided by the utility model.

Electric expansion valve has valve seat 10, and valve seat 10 can be shaped using metal cutting process, and be connected in its circumferential direction First connecting tube, axial lower end is connected with the second connecting tube, and forms valve chamber 14 in the inside of valve seat 10, for refrigerant stream It is logical.Valve seat 10 is provided with valve port 11, and valve port 11 and needle 33 are cooperated to change the circulating face between valve port 11 and needle 33 Product, to realize the accurate adjusting of flow, valve seat 10 is additionally provided with valve seat inner hole 12 and protrusion 13, and the protrusion 13 is towards valve chamber 14 Carry out protrusion.Valve seat 10 and the first connecting tube, the second connecting tube constitute valve component.First connecting tube, valve port 11, second connect Adapter tube is formed refrigerant circulation passage.Refrigerant can be flowed into from the first connecting tube, flow through valve port 1c, from the second connecting tube stream Out, it can also be flowed into from the second connecting tube, flow through valve port 11, flowed out from the first connecting tube.

The top of valve seat 10 is provided with the cover 21, and the cover 21 is substantially cup-shaped, bottom have opening, and with valve seat 10 It is connected and fixed.Specifically, can 10 upper end of valve seat be arranged valve seat stage portion 10a, and by the bottom opening of the cover 21 with Valve seat stage portion 10a cooperation, and implement welding and be fixed.

In the top of the cover 21, it is additionally provided with shell 22, shell 22 and the cover 21 can be consolidated by the way of welding It is fixed, in this way, being formed relatively closed space between shell 22, the cover 21, valve seat 10, and pass through the first connecting tube and second Connecting tube carries out the circulation of refrigerant and the adjusting of flow.Shell 22 constitutes casing assembly 20 with the cover 21 together.

In the space that shell 22 and the cover 21 are surrounded, it is provided with magnetic rotor component 60, magnetic rotor component 60 includes turning Subassembly 61 and attachment base 62, rotor part 61 can incude the signal of stator coil component and rotate, and screw rod 31 passes through company Joint chair 62 and rotor part 61 are fixedly connected as an entirety.

Screw rod needle component 30 includes screw rod 31, sleeve 32 and needle 33, passes through sleeve between screw rod 31 and needle 33 Portion 32 realizes floating connection, and sleeve part 32 is substantially cup-shaped, and opening is arranged at bottom, and needle 33 passes through the opening and protrudes into valve chamber 14 To be contacted or be separated with valve port 11 to carry out flow adjusting to the refrigerant for flowing through valve port 11.It is worked in electric expansion valve Cheng Zhong, needle 33 can be moved up and down in certain stroke with relative sleeve portion 32, but can not be detached from the limitation of sleeve part 32.

Nut assembly 40 includes nut body 41, connection sheet 41 and nut guide part 43, and nut body 41 passes through connection Piece 41 is fixedly installed in the cover 21, and nut 41 can be using non-metallic material and 42 integrated injection molding of connection sheet.Nut body 41 be equipped with axially through through-hole, be internally provided with internal screw thread in through-hole, correspondingly, the periphery of screw rod 31 is correspondingly arranged on External thread part is started turning when rotor part 61 is driven by external coil, because screw rod 31 passes through attachment base 62 and rotor portions Part 61 is fixedly connected as an entirety, so that screw rod 31 is also rotated therewith, the internal screw thread of nut body 41 and screw rod 31 External screw thread by screwing togather effect driving screw rod 31 moves axially downwards that needle 33 is driven to make elevating movement, keeps needle 33 close Or far from valve port 11, to achieve the purpose that adjust the cold medium flux for passing through valve port 11.

Electric expansion valve provided by the utility model further includes guide member 50, which includes the first guidance Portion 51 and the second guide portion 52, the first guide portion 51 and the cooperation of the second guide portion 52 are fixed, and specifically, the first guide portion 51 is set There are guide hole 511 and the first inner edge portion 515, needle 33 may pass through guide hole 511 and protrude into valve chamber 14, and guide hole 511 is to needle 33 provide guiding role, and the second guide portion 52 is equipped with the second inner edge portion 522 and third outer edge 524, the second guide portion 52 and spiral shell Cooperation is fixed in female guide part 43, and specifically, the third outer edge 524 of the second guide portion 52 is interior with nut guide part 43 Wall carries out cooperation fixation, and the second guide portion 52 provides guiding role to nut assembly 40, and sleeve 32 protrudes into the interior of guide member 50 Chamber simultaneously can freely up and down be slided in the inner cavity of guide member 50, specifically, the first inner edge portion 515 and sleeve of the first guide portion 51 32 outer wall is cooperated, and the second inner edge portion 522 of the second guide portion 52 and the outer wall of sleeve 32 are cooperated, the first inner edge portion 515 and second the specific fit system of outer wall of inner edge portion 522 and sleeve 32 can cooperate for small―gap suture, that is, the first guide portion 51 and second guide portion 52 can simultaneously to sleeve 32 provide guiding role.Further, the first guide portion 51 further includes first Outer edge 512, the second outer edge 513 and the first leading end 514, between first outer edge 512 and the second outer edge 513 Connection is formed with first step portion, and connection is formed with second step portion between the second outer edge 513 and the first leading end 514, The protrusion 13 of first step portion and valve seat 10 abuts against cooperation, the outer diameter of the second outer edge 513 and the valve seat inner hole of valve seat 10 12 internal diameter matches.Second guide portion 52 further includes the second leading end 521 and third inner edge portion 523, the second inner edge portion Connection is formed with third stage portion between 522 and third inner edge portion 523, and third stage portion is abutted against with the first leading end 514 Cooperation, second step portion and the second leading end 521 abut against cooperation.The outer diameter and valve seat inner hole 12 of second leading end 521 Internal diameter match.

According to electronic expansion valve structure provided by the utility model, nut assembly 40, needle screw rod can further ensure that Concentricity between 11 three of component 30 and valve port, because the setting of guide member 50 is in practical electric expansion valve actuation process In, nut assembly 40 is oriented to by the second guide portion 52, and the sleeve 32 of needle screw component 30 is by the first guide portion 51 and Two guide portions 52 provide guiding simultaneously, and needle 33 provides guiding by the first guide portion 51, it can be ensured that nut assembly 40, needle screw rod Component 30 and 11 three of valve port on the same axis, when ensure that the concentricity of each components of electric expansion valve prevents actuation Each components do not deviate on the same axis and cause abrasion of the needle 33 to valve port 11, while needle 33 passes through guide hole 511 protrude into valve chamber 14, and refrigerant can generate certain impact when entering from the first connecting tube or the second connecting tube to needle 33, Because the setting of guide member 50 further avoids impact of the needle 33 by refrigerant so as to always with other components same Actuation is carried out on one axis to be prevented from causing to wear to valve port 11.It should be noted that electric expansion valve provided by the utility model Guide member 50 is parts processing structure, and certain guide member may be to be integrally machined molding, such as use close-fitting, welding side Formula is connected as an indivisible entirety in the course of work of electric expansion valve.Obviously, which forms Guide member and be integrally machined molding made of guide member have identical technological means, can be realized essentially identical skill Art effect.

The term positions such as upper and lower, left and right as described herein are to be described with reference view shown in FIG. 1, not It should be understood as limitations of the present invention.

Electric expansion valve provided by the utility model is described in detail above.Specific case used herein The principles of the present invention and embodiment are expounded, the above embodiments are only used to help understand, and this is practical Novel method and its core concept.It should be pointed out that for those skilled in the art, not departing from this reality Under the premise of with new principle, several improvements and modifications can be made to this utility model, these improvement and modification are also fallen into In the protection scope of the utility model claims.

Claims

1. a kind of electric expansion valve, including valve component, the valve component includes valve seat (10), and the valve seat (10) is formed with Valve chamber (14) and valve port (11)；Casing assembly (20), including the cover (21) and shell (22), the cover (21) and the valve seat (10) it is fixedly connected, the shell (22) is fixedly connected with the cover (21)；Needle screw component (30), including screw rod (31), sleeve (32) and needle (33), the screw rod (31) are floated by the sleeve (32) with the needle (33) Connection；Nut assembly (40), including nut body (41), connection sheet (42) and nut guide part (43), the nut body (41) with the screw rod (31) by being threadedly engaged, which is characterized in that it further include guide member (50), the guide member (50) Including the first guide portion (51) and the second guide portion (52), second guide portion (52) and the nut guide part (43) are fixed Cooperation, first guide portion (51) provide guiding, first guide portion (51) and the second guide portion to the needle (33) (52) guiding is provided to the sleeve (32) simultaneously.

2. electric expansion valve according to claim 1, which is characterized in that the valve seat (10) is provided with valve seat inner hole (12) And protrusion (13).

3. electric expansion valve according to claim 2, which is characterized in that first guide portion (51) is equipped with guide hole (511), the needle (33) passes through the guide hole (511) and protrudes into the valve chamber (14), and first guide portion (51) is right The needle (33) provides guiding.

4. electric expansion valve according to claim 3, which is characterized in that first guide portion (51) includes the first inner edge Portion (515), first inner edge portion (515) match with the outer wall of the sleeve (32).

5. electric expansion valve according to claim 1, which is characterized in that second guide portion (52) includes the second inner edge Portion (522), third outer edge (524) and the second leading end (521), second inner edge portion (522) and the sleeve (32) outer wall matches, and the third outer edge (524) matches fixation with the inner wall of the nut guide part (43).

6. electric expansion valve according to claim 5, which is characterized in that the outer diameter of second leading end (521) with The internal diameter of valve seat inner hole (12) matches.

7. electric expansion valve according to claim 3, which is characterized in that first guide portion (51) further includes outside first Edge (512), the second outer edge (513) and the first leading end (514), first outer edge (512) and described second First step portion is formed between outer edge (513), the first step portion is contacted with the protrusion (13).

8. electric expansion valve according to claim 7, which is characterized in that second outer edge (513) and described first Second step portion is formed between leading end (514), the second step portion is contacted with the second leading end (521).

9. electric expansion valve according to claim 8, which is characterized in that the outer diameter of second outer edge (513) and institute The internal diameter for stating valve seat inner hole (12) matches.