CN217559026U

CN217559026U - High-stability electronic expansion valve

Info

Publication number: CN217559026U
Application number: CN202221698196.2U
Authority: CN
Inventors: 林宏华; 张庆; 周文亮
Original assignee: Yangzhou Java Electric Co ltd
Current assignee: Yangzhou Java Electric Co ltd
Priority date: 2022-07-02
Filing date: 2022-07-02
Publication date: 2022-10-11
Anticipated expiration: 2032-07-02

Abstract

The utility model discloses a high stability electronic expansion valve belongs to switch accessory technical field. The valve mainly comprises a driving mechanism and a valve body, wherein the valve body comprises a valve casing assembly, a rotor assembly and a valve core assembly, the valve casing assembly comprises a valve sleeve and a valve seat fixedly connected with the valve sleeve in a sealing way, the rotor assembly and the valve core assembly are accommodated in a sealed cavity formed by the valve sleeve and the valve seat, and a guide seat coaxial with a screw of the rotor assembly is fixedly arranged at the top end of the valve sleeve; the guide seat comprises a central shaft sleeve and an excircle body, wherein a screw rod through hole is axially formed in the central shaft sleeve, the excircle body and the central shaft sleeve form a whole and are arranged around the circumference of the central shaft sleeve, a plurality of positioning grooves are uniformly distributed on the outer edge of the bottom surface of the excircle body, and positioning bulges accommodated in the positioning grooves are arranged on the valve sleeve. The utility model has stable operation, reliability and durability, long service life and high product quality; the structure design is simple, the manufacture is easy, the production cost is low, the practicability is strong, and the electronic expansion valve can be widely applied to the technical field of electronic expansion valves.

Description

High-stability electronic expansion valve

Technical Field

The utility model relates to a be applied to the switch accessory in gas utensil, the electrical apparatus refrigeration trade, specifically speaking especially relates to a product operation is stable, reliable durable, long service life, high stability electronic expansion valve of product quality.

Background

As described in the background art of the invention of the chinese patent entitled reliable electronic expansion valve, with publication No. CN213982044U and publication No. 2021.08.17: the refrigerating equipment realizes the control of refrigerating flow through the electronic expansion valve, and the gas appliance realizes the control of gas flow through the electronic expansion valve. The electronic expansion valve is composed of a coil assembly and a valve body, wherein the valve body mainly comprises a rotor assembly, a valve core assembly, a valve shell assembly, a gas flow port and the like. The rotor assembly comprises a rotor, a valve needle component and a stop rod, the valve needle component and the stop rod are fixedly connected with the rotor coaxially, a screw of the valve needle component is in threaded connection with a valve core of a valve core assembly, the rotor rotates to drive the screw to rotate, the screw rotates while moving axially, so that the distance between a valve needle of the valve needle component and a valve port is changed, the stop rod pushes a stop ring along the spiral axial direction of a guide rail spring, the stop ring of the valve core assembly plays a limiting role, and after the stop ring runs to the upper and lower poles of the guide rail spring, the stop ring, the stop rod and the rotor cannot keep the original direction to continue to move forward, so that the vertical movement amplitude of the valve needle component is limited; the valve core assembly comprises a valve core, a valve core fixing ring, a guide rail spring and a stop ring, the guide rail spring and the stop ring are sleeved on the valve core after being screwed, the valve core is fixedly connected with the valve core fixing ring, and the valve core fixing ring is fixedly connected with a valve seat of the valve shell assembly; the valve shell assembly comprises a valve seat, a valve sleeve fixedly connected with the valve seat and a valve port arranged at the bottom of the valve seat, and the valve port is matched with the valve needle component; the gas circulation port comprises a first gas circulation port and a second gas circulation port which are used for gas to enter and exit. The first gas circulation port and the second gas circulation port form a closed refrigerant system with the air-conditioning pipeline system, and form a closed gas pipeline system with the stove pipeline system.

The working principle of the electronic expansion valve is as follows: the coil assembly drives the magnetic rotor to rotate forwards or reversely, and the magnetic rotor drives the valve needle assembly to rotate in the valve core and move axially along the valve core, so that the flow area of the valve port is adjusted, and further the flow of refrigerant or fuel gas is adjusted. The electronic expansion valve has the advantages of large adjustment range, rapid and sensitive action, high adjustment precision, strong stability and the like, and is widely applied to the industry fields of electric appliance refrigeration systems, gas appliances and the like.

Traditional electronic expansion valve screw rod and case threaded connection, screw rod up-and-down motion only the case is playing the guide effect, and the clearance distance between rotor and the valve barrel is very little, and the screw rod operation is unstable (for example produce slightly rocking), will lead to the rotor to strike the valve barrel inner wall, not only produces the noise, can rotor, valve barrel produce great wearing and tearing moreover, leads to the product to have a series of problems such as the performance is unstable, life is short, the product quality is not high.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a product operation is stable, reliable durable, long service life, high stability electronic expansion valve of product quality to the not enough of prior art existence.

The utility model discloses a realize through following technical scheme:

a high-stability electronic expansion valve comprises a driving mechanism and a valve body; wherein, the valve body comprises a valve shell assembly, a rotor assembly and a valve core assembly;

the valve casing assembly comprises a valve sleeve and a valve seat fixedly connected with the valve sleeve in a sealing way, the rotor assembly and the valve core assembly are accommodated in a sealed cavity formed by the valve sleeve and the valve seat,

the top end of the valve sleeve is fixedly provided with a guide seat which is coaxial with the screw of the rotor assembly;

the guide holder comprises a central shaft sleeve and an excircle body, the central shaft sleeve is axially provided with a screw rod through hole, the excircle body and the central shaft sleeve form a whole and are arranged around the circumference of the central shaft sleeve, a plurality of positioning grooves are uniformly distributed on the outer edge of the bottom surface of the excircle body, and positioning bulges accommodated in the positioning grooves are arranged on the valve sleeve.

Preferably, the top surface of the central shaft sleeve is in contact with the upper inner wall of the valve sleeve, and the central shaft sleeve is provided with an exhaust port communicated with the screw through hole.

Preferably, the exhaust port is located on the upper end surface of the central shaft sleeve and is opened along the radial direction of the central shaft sleeve.

Preferably, a plurality of positioning holes are further formed in the outer circle body and are evenly distributed in the circumferential direction.

Preferably, the number of the positioning holes is four, the number of the positioning grooves is also four, and each positioning groove is arranged on the edge of the middle area of two adjacent positioning holes.

Preferably, the positioning projection is a riveting point formed by applying an outside-in radial riveting force to the valve sleeve.

Preferably, the material of guide holder is engineering plastics.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model has stable operation, reliability and durability, long service life and high product quality; the structure design is simple, the manufacture is easy, the production cost is low, the practicability is strong, and the method can be widely applied to the technical field of electronic expansion valves.

Drawings

FIG. 1 is a schematic view of the structure of the valve body of the present invention;

FIG. 2 is a schematic sectional view of the valve body of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 according to the present invention;

fig. 4 is a schematic view of the three-dimensional structure of the guide seat of the present invention.

In the figure: 1. a valve body; 111. a valve housing; 112. a valve seat; 12. a rotor assembly; 121. a screw; 13. a valve core assembly; 14. a guide seat; 141. a screw through hole; 142. a central shaft sleeve; 143. an exhaust port; 144. an outer circular body; 145. positioning a groove; 146. positioning a projection; 147. and (6) positioning the holes.

Detailed Description

The present invention will be further explained with reference to the accompanying drawings:

in order to make the reader better understand the design concept of the present invention, the following description will be made with reference to the embodiments. It should be noted that the following paragraphs may refer to terms of orientation, including but not limited to "upper, lower, left, right, front, back" and the like, and these terms are intended to correspond to the visual orientations shown in the drawings, and should not be construed as limiting the scope or spirit of the present invention, but are merely intended to facilitate those skilled in the art to better understand the technical solutions of the present invention.

In the description of the present specification, it should be noted that the terms "mounted", "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Example 1:

a high-stability electronic expansion valve comprises a driving mechanism and a valve body 1; wherein, the valve body 1 comprises a valve casing assembly, a rotor assembly 12 and a valve core assembly 13; the driving mechanism is a coil assembly. The rotor assembly 12 mainly comprises a rotor, a valve needle assembly and a stop rod; the valve core assembly comprises a valve core, a valve core fixing ring, a guide rail spring and a stop ring; the valve casing assembly comprises a valve seat, a valve sleeve fixedly connected with the valve seat and a valve port arranged at the bottom of the valve seat, the valve port is matched with the valve needle assembly, the valve seat 112 is fixedly connected with the valve sleeve 111 in a sealing manner, and the rotor assembly 12 and the valve core assembly 13 are accommodated in a sealed cavity formed by the valve sleeve 111 and the valve seat 112; the gas circulation port comprises a first gas circulation port and a second gas circulation port which are used for gas to enter and exit. The first gas circulation port and the second gas circulation port form a closed refrigerant system with the air-conditioning pipeline system, and form a closed gas pipeline system with the stove pipeline system. Coil assembly, rotor assembly, case assembly, valve casing assembly are prior art, and for avoiding the literary composition loaded down with trivial details, this embodiment is not repeated.

In this embodiment, a guide seat 14 coaxial with the screw 121 of the rotor assembly 12 is fixedly disposed at the top end of the valve housing 111; the guide seat 14 includes a central shaft sleeve 142 axially provided with a screw through hole 141, and an outer cylindrical body 144 formed integrally with the central shaft sleeve 142 and circumferentially disposed around the central shaft sleeve 142, and the head of the screw 121 axially moves in the screw through hole 141. A plurality of positioning grooves 145 are uniformly distributed on the outer edge of the bottom surface of the outer circular body 144, and a positioning protrusion 146 accommodated in the positioning groove 145 is provided on the valve housing 111.

Under the effect of coil assembly, the rotor drives the relative case rotation of screw rod 121, screw rod 121 and case threaded connection, the rotation of screw rod 121 makes the relative case of screw rod also produce axial motion, the screw rod receives the guide effect of case on the one hand, the head of on the other hand screw rod receives the guide effect of guide holder, the head of screw rod all receives the direction with the body of screw rod, dual guide effect makes the product very steady at the operation in-process, the phenomenon of rocking does not have, effectively avoid the possibility that rotor and valve barrel inner wall collided mutually.

The constant head tank of this embodiment is even interval distribution, and in the protruding embedding constant head tank in location of valve barrel inner wall, the cooperation of location arch and constant head tank makes the guide holder can not produce the removal in axial or radial.

The embodiment has stable operation, reliability, durability, long service life and high product quality; the structure design is simple, the manufacture is easy, the production cost is low, the practicability is strong, and the electronic expansion valve can be widely applied to the technical field of electronic expansion valves.

Example 2:

on the basis of embodiment 1, the present invention proceeds with detailed description of the technical features and functions of the technical features in the present invention to help those skilled in the art fully understand the technical solution of the present invention and reproduce it.

A high-stability electronic expansion valve comprises a driving mechanism and a valve body 1; wherein, the valve body 1 comprises a valve casing assembly, a rotor assembly 12 and a valve core assembly 13; the driving mechanism is a coil assembly. The valve casing assembly comprises a valve sleeve 111 and a valve seat 112 hermetically fixedly connected with the valve sleeve 111, and the rotor assembly 12 and the valve core assembly 13 are accommodated in a sealed cavity formed by the valve sleeve 111 and the valve seat 112.

In this embodiment, a guide seat 14 coaxial with the screw 121 of the rotor assembly 12 is fixedly provided at the top end position of the valve housing 111. The material of the guide seat 14 is engineering plastic. The guide holder 14 includes a central shaft sleeve 142 axially provided with a screw through hole 141, and an outer cylindrical body 144 formed integrally with the central shaft sleeve 142 and circumferentially disposed around the central shaft sleeve 142, wherein a plurality of positioning grooves 145 are uniformly distributed on the outer edge of the bottom surface of the outer cylindrical body 144, and the valve housing 111 is provided with positioning protrusions 146 accommodated in the positioning grooves 145. The head of the screw 121 reciprocates axially within the screw through hole 141 of the central boss 142. The top surface of the central sleeve 142 contacts the upper inner wall of the valve housing 111, and the central sleeve 142 is provided with an exhaust port 143 communicating with the screw through hole 141. The movement of the screw 121 in the screw through hole 141 generates air resistance, and the air outlet 143 enables the screw through hole 141 to communicate with the outside, thereby ensuring smooth movement of the screw.

Specifically, the exhaust port 143 of the present embodiment is located on the upper end surface of the central boss 142, and opens in the radial direction of the central boss 142.

In this embodiment, a plurality of positioning holes 147 are uniformly distributed along the circumferential direction on the outer circular body 144. The positioning hole 147 plays a role in reducing weight and saving raw materials on one hand, and plays a role in being easy to grab and position in the production process on the other hand.

The number of the positioning holes 147 is four, and the number of the positioning grooves 145 is also four, and each positioning groove 145 is provided on an edge of a middle area of two adjacent positioning holes 147.

The positioning protrusion 146 of the present embodiment is a rivet point formed by applying an outward-inward radial rivet force to the valve housing 111. The position of the guide seat can be fixed through the positioning hole 147, and the position of the positioning groove can be identified through the positioning hole, so that the position of the riveting point on the outer side is determined. The caulking point is a projection formed by locally deforming the valve sleeve by caulking.

The constant head tank of this embodiment is even interval distribution, and in the protruding embedding constant head tank in location of valve barrel inner wall, the cooperation of location arch and constant head tank makes the guide holder no matter can not produce the removal in axial or radial.

In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications in the shape, structure, characteristics and spirit of the claims of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A high-stability electronic expansion valve comprises a driving mechanism and a valve body; wherein, the valve body comprises a valve shell assembly, a rotor assembly and a valve core assembly;

valve casing assembly include the valve barrel, with the disk seat of the airtight rigid coupling of valve barrel, rotor assembly, case assembly hold in the airtight cavity that valve barrel and disk seat formed, its characterized in that:

the guide holder comprises a central shaft sleeve and an outer circle body, wherein the central shaft sleeve is axially provided with a screw rod through hole, the outer circle body and the central shaft sleeve form a whole and are arranged around the circumference of the central shaft sleeve, a plurality of positioning grooves are uniformly distributed in the outer edge of the bottom surface of the outer circle body, and the valve sleeve is provided with positioning bulges accommodated in the positioning grooves.

2. The high stability electronic expansion valve of claim 1, wherein: the top surface of the central shaft sleeve is in contact with the upper inner wall of the valve sleeve, and an exhaust port communicated with the screw through hole is formed in the central shaft sleeve.

3. The high stability electronic expansion valve of claim 2, wherein: the exhaust port is located on the upper end face of the central shaft sleeve and is formed in the radial direction of the central shaft sleeve.

4. A high stability electronic expansion valve according to claim 1 or 2, wherein: the outer circle body is also provided with a plurality of positioning holes which are uniformly distributed along the circumferential direction.

5. The high stability electronic expansion valve of claim 4, wherein: the number of the positioning holes is four, the number of the positioning grooves is four, and each positioning groove is arranged on the edge of the middle area of two adjacent positioning holes.

6. The high stability electronic expansion valve of claim 1, wherein: the positioning bulge is a riveting point formed by applying radial riveting acting force from outside to inside to the valve sleeve.

7. The high stability electronic expansion valve of claim 1, wherein: the guide seat is made of engineering plastics.