CN113969987A

CN113969987A - Electronic expansion valve

Info

Publication number: CN113969987A
Application number: CN202010728075.7A
Authority: CN
Inventors: 范志伟; 叶南伟; 舒虎刚; 郭国武
Original assignee: Longquan Huifeng Import And Export Co ltd
Current assignee: Zhejiang Zhihui Automotive Thermal Management Technology Co ltd
Priority date: 2020-07-24
Filing date: 2020-07-24
Publication date: 2022-01-25
Anticipated expiration: 2040-07-24
Also published as: CN113969987B

Abstract

The invention provides an electronic expansion valve, which comprises a valve component and a valve body, wherein the valve component is connected with the valve body, the valve component comprises a stator component and a valve core component, the valve core component comprises a rotor, a sleeve, a valve seat and a valve needle, the stator component is positioned on the outer side of the rotor, the rotor is positioned on the inner side of the sleeve, the valve seat is provided with a valve port, the rotor can drive the valve needle to move relative to the valve port, the stator component is fixedly connected with an elastic buckle, the stator component is detachably connected with the valve core component through the elastic buckle, the valve body limits the elastic buckle to be separated, the stator component is convenient to replace through the detachable connection between the stator component and the valve core component, and the requirement of a customer for the delivery of the whole valve group is met.

Description

Electronic expansion valve

Technical Field

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

Background

201811146859.8 patent application provides an motorised valve, because stator module and case subassembly pass through hot riveting fixed connection and be in the same place, consequently in the assembling process, when detecting the problem, stator module is difficult to be changed, can only scrap whole valves, and manufacturing cost is than higher. 201710255248.6, provides an electrically operated valve, wherein the stator assembly needs to be separately fixed with the valve body.

Disclosure of Invention

In order to solve the technical problem, the invention provides the electronic expansion valve, through the detachable connection between the stator assembly and the valve core assembly, the stator assembly is convenient to replace, and the requirement of customers for the delivery of the whole valve bank is met.

The invention provides an electronic expansion valve, which comprises a valve component and a valve body, wherein the valve component is connected with the valve body, the valve component comprises a stator component and a valve core component, the valve core component comprises a rotor, a sleeve, a valve seat and a valve needle, the stator component is positioned on the outer side of the rotor, the rotor is positioned on the inner side of the sleeve, the valve seat is provided with a valve port, the rotor can drive the valve needle to move relative to the valve port, the stator component is fixedly connected with an elastic buckle with a radially-pressed valve seat, the buckle comprises a downward extending part and a radial clamping part, the stator component is detachably connected with the valve core component through the buckle, and the buckle is limited to be separated from the valve body.

The valve seat comprises a first step part, the buckle is clamped into the first step part, the valve seat is inserted into the valve body, and the side wall of the valve body insertion hole limits the buckle to be separated from the valve body insertion hole.

Further, the radial pressing part of the valve seat comprises a straight section for preventing the buckle from rotating.

Further, the valve body insertion hole has a second stepped portion that restricts the axial movement of the catch.

The valve body and the valve seat are fixed by matching of a stop lever and a stop lever groove, and the buckle is clamped into the stop lever groove. The stop lever limits the elastic buckle to be separated.

Further, the valve body insertion hole has a second step portion, the valve seat has a first step portion, the clip has a bent portion attached to the step, and the first step portion and the second step portion press the clip.

The circumference of the valve seat is provided with a concave part, the buckle is clamped into the concave part, the valve seat is inserted into the valve body, and the side wall of the valve body insertion hole limits the buckle to be separated.

Stator module includes that the coil moulds plastics at stator case outlying insulating layer, the buckle is fixed in the lower terminal surface of insulating layer, the buckle includes the flat plate portion and decurrent extension and the radial card income portion of being connected with the lower terminal surface of insulating layer.

The buckle is fixed on the annular connecting plate, and the connecting plate is fixed on the lower end face of the insulating layer.

The flat plate portion is annular and fixed to the lower end face of the insulating layer.

Drawings

Fig. 1 is a sectional view of an electronic expansion valve according to embodiment 1.

Fig. 2 is a perspective view of the snap fastener of embodiment 1.

Fig. 3 is a partially enlarged view of the electronic expansion valve according to embodiment 1.

Fig. 4 is a sectional view of the electronic expansion valve of embodiment 2.

Fig. 5 is a perspective view of the snap fastener of embodiment 2.

Fig. 6 is a partially enlarged view of the electronic expansion valve according to embodiment 2.

Fig. 7 is a sectional view of the electronic expansion valve according to embodiment 3.

FIG. 8 is a sectional view of the snap fastener of embodiment 3.

FIG. 9 is a perspective view of the snap fastener of embodiment 3.

Detailed Description

The invention is further described in the following with reference to the drawings and the detailed description, which are clearly described in the cited background documents and are not overrepresented here.

Example 1

Referring to fig. 1, 2 and 3, the electronic expansion valve includes a valve body 1 and a valve assembly 2, and the valve assembly 2 and the valve body 1 are fixedly connected or detachably connected.

The valve assembly 2 comprises a valve core assembly 10 and a stator assembly 20; the valve core assembly 2 and the valve body 1 are relatively limited, and the valve core assembly 10 is relatively limited relative to the stator assembly 20; i.e., the core assembly 10 is removably coupled to the stator assembly 20 such that the valve assembly 2 is formed as a unitary body.

The stator assembly 20 comprises a coil 21, a framework 22, a buckle 23 and an annular connecting plate 25, wherein the framework 22 provides support for winding the coil 21; the stator assembly 20 further comprises an injection molding body, the injection molding body takes parts including the coil 21, the framework 22 and the like as injection molding inserts, and the insulation layer 24 of the stator assembly 20 is formed on the periphery of the coil 21 and the framework 22 through the injection molding body, so that the stator assembly 20 can be prevented from being corroded by working media or air. The annular connecting plate 25 is fixed to the lower end surface of the insulating layer 24 by thermal caulking, and the clip 23 is welded to the annular connecting plate 25. The snap 23 includes a flat plate portion 231 connected to the lower end surface of the insulating layer 24, a downward extending portion 232, and a radial snap 233, where the snap 233 is a tip of the snap and the tip points in the direction of the valve seat.

The valve core assembly 10 comprises a screw 11, a connecting piece 12, a sleeve 13, a rotor 14, a nut 15, a valve seat 16, and a valve needle 17, wherein the rotor 14 can drive the valve needle 17 to move, the valve needle 17 can move relative to the valve seat 16, the valve seat 16 has a valve port 161, the valve port 161 is communicated with channels on two sides of the valve port 161, and a throttling can be formed at the valve port 161. The sleeve 13 covers the outer periphery of the magnetic rotor 14, and the sleeve 13 is welded and fixed to the valve seat 16. The valve core assembly 10 and the valve body 1 are sealed by

sealing rings

3 and 4. Of course, the valve seat can be formed by fixedly connecting a connecting piece easy to weld and a valve seat body easy to machine, the sleeve and the connecting piece are fixed by welding, and the serial number is not a limit to the definition of the valve seat.

When the electronic expansion valve is assembled, firstly, the valve core assembly 10 and the stator assembly 20 are assembled, then the stator assembly is assembled on the valve core assembly 10 to form the valve assembly 2, the valve seat 16 comprises a first step part 162, the buckle is clamped into the first step part 162, the valve seat 16 is radially pressed, and the valve seat 16 is detachably connected through the elasticity of the buckle 23; then the valve component 2 is inserted into the valve body 1, the radial deviation of the buckle clamping part 233 is prevented through the side wall 101 of the valve body insertion hole, and the buckle 23 is limited to be separated; the valve body insertion hole has a second stepped portion 102, and the stepped portion 102 restricts the axial movement of the catch.

Example 2

Referring to fig. 4, 5 and 6, the valve body 1 is further provided with at least two stop rod holes 5 (not separately shown), the stop rods 6 are arranged in the stop rod holes, and the valve seat 16 is provided with a stop rod groove 18 which is matched with the stop rods for limiting, and can be a straight groove or an annular groove. The valve body 1 is formed with at least one breach, at least a part of pin stretches into through the breach in the chamber, stretch into in the chamber the pin portion with the butt of pin groove 18 or butt joint, pin 6 restriction the displacement of valve seat 16 in the axis direction. All of the above are set forth in the background documents.

The annular connecting plate 25 is fixed to the lower end surface of the insulating layer 24 by thermal caulking, and the clip 26 is welded to the annular connecting plate 25. The snap 26 includes a flat plate portion 261 connected to the lower end surface of the insulating layer 24, a downward extending portion 262, and a radial snap-in portion 263, where the snap-in portion 263 is arc-shaped, and a tip end thereof is away from the valve seat direction.

When the electronic expansion valve is assembled, firstly, the valve core assembly 10 and the stator assembly 20 are assembled, then the stator assembly is assembled on the valve core assembly 10 to form the valve assembly 2, the buckle 26 is clamped into the stop lever groove 18, and the stop lever groove 18 limits the buckle 26 to be separated; then the valve component 2 is inserted into the valve body 1, and after the stop lever is installed, the stop lever limits the buckle 26 to be separated; the valve seat has a first step 162, the valve body insertion hole has a second step 102, the clip 26 has a bending portion 2621 fitting with the first step 162 and the second step 102, and the first step 162 and the second step 102 press the clip 26 to restrict the clip from coming off. Other undescribed structures refer to example 1.

Example 3

Referring to fig. 7, 8 and 9, the flat plate portion 271 of the snap 27 is annular, is fixed to the lower end surface of the insulating layer 24 by thermal caulking, and has a downward extending portion 272 integrated with the flat plate portion and a radial snap-in portion protruding point 273 which points in the valve seat direction.

When the electronic expansion valve is assembled, firstly, the valve core assembly 10 and the stator assembly 20 are assembled, then the stator assembly is assembled on the valve core assembly 10 to form the valve assembly 2, the circumference of the valve seat is provided with a concave part 164, and the buckling salient points 273 are clamped into the concave part 164 and are detachably connected through the elasticity of buckles; the valve assembly 2 is then inserted into the valve body 1, and the snap fit bosses 273 are prevented from radially shifting by the valve body insertion hole sidewalls, further restricting the snap fit from coming out. Other undescribed structures refer to example 1.

It should be noted that: the above embodiments are only used for illustrating the present invention and not for limiting the technical solutions described in the present invention, and the expressions of upper, lower, inner, outer, etc. presented herein are only used for clearly illustrating the technical solutions of the present invention, and not for limiting the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that various changes and modifications may be made therein without departing from the spirit and scope of the invention.

Claims

1. The electronic expansion valve comprises a valve component and a valve body, wherein the valve component is connected with the valve body, the valve component comprises a stator component and a valve core component, the valve core component comprises a rotor, a sleeve, a valve seat and a valve needle, the stator component is positioned on the outer side of the rotor, the rotor is positioned on the inner side of the sleeve, the valve seat is provided with a valve port, and the rotor can drive the valve needle to move relative to the valve port, and the electronic expansion valve is characterized in that: stator module and the elasticity buckle fixed connection who has radial pressure disk seat, the buckle includes decurrent extension and radial card income portion, stator module passes through the buckle with the case subassembly and can dismantle with the connection, through the valve body restriction the buckle is deviate from.

2. The electronic expansion valve according to claim 1, wherein: the valve seat comprises a first step part, the buckle is clamped into the first step part, the valve seat is inserted into the valve body, and the side wall of the valve body insertion hole limits the buckle to be separated from the valve body insertion hole.

3. The electronic expansion valve according to claim 2, wherein: the radial pressing part of the valve seat comprises a straight section for preventing the buckle from rotating.

4. The electronic expansion valve according to claim 2, wherein the valve body insertion hole has a second stepped portion which restricts axial movement of the clip.

5. The electronic expansion valve according to claim 1, wherein: the valve body and the valve seat are fixed by matching of a stop lever and a stop lever groove, and the buckle is clamped into the stop lever groove.

6. The electronic expansion valve according to claim 5, wherein: the valve body inserting hole is provided with a second step part, the valve seat is provided with a first step part, the buckle is provided with a bending part attached to the step, and the first step part and the second step part press the buckle.

7. The electronic expansion valve according to claim 1, wherein: the circumference of the valve seat is provided with a concave part, the buckle is clamped into the concave part, the valve seat is inserted into the valve body, and the side wall of the valve body insertion hole limits the buckle to be separated.

8. The electronic expansion valve according to any one of claims 1 to 7, wherein: stator module includes the coil and moulds plastics at stator casing outlying insulating layer, the buckle is fixed in the lower terminal surface of insulating layer, the buckle includes the flat plate portion and decurrent extension and the radial card income portion of being connected with the lower terminal surface of insulating layer.

9. The electronic expansion valve according to claim 8, wherein: the buckle is fixed on the annular connecting plate, and the connecting plate is fixed on the lower end face of the insulating layer.

10. The electronic expansion valve according to claim 8, wherein: the flat plate portion is annular and fixed to the lower end face of the insulating layer.