CN111120664B

CN111120664B - Electronic expansion valve and air conditioner

Info

Publication number: CN111120664B
Application number: CN201911326873.0A
Authority: CN
Inventors: 陈沛霞; 郭登俊; 朱勇; 马先瑛
Original assignee: Gree Electric Appliances Inc of Zhuhai
Current assignee: Gree Electric Appliances Inc of Zhuhai
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2021-02-02
Anticipated expiration: 2039-12-20
Also published as: CN111120664A

Abstract

The invention provides an electronic expansion valve and an air conditioner. The electronic expansion valve comprises a valve body, a valve needle, a lifting assembly and a lifting driving assembly, wherein a valve port is formed in the valve body, the lifting driving assembly comprises a magnetic rotor, the lifting assembly comprises a reciprocating member, an anti-rotation member capable of limiting the reciprocating member to rotate and a rotating member capable of being driven by the magnetic rotor to rotate, the reciprocating member is coaxially in threaded connection with the rotating member, and when the reciprocating member is lifted, the valve needle can selectively block the valve port. According to the electronic expansion valve and the air conditioner, the relative position of the magnetic rotor and the external stator coil is not changed in the process that the valve needle selectively plugs the valve port, so that the phenomena of noise caused by the lifting of the magnetic rotor and the blocking of the electronic expansion valve in the prior art are completely eliminated.

Description

Electronic expansion valve and air conditioner

Technical Field

The invention belongs to the technical field of valve body manufacturing, and particularly relates to an electronic expansion valve and an air conditioner.

Background

The electronic expansion valve is used as an element for adjusting the flow, adapts to the development requirement of the refrigeration machine-electricity integration, provides conditions for the intellectualization of a refrigeration system, and is a self-control adjusting element with a great development prospect. The electronic expansion valve utilizes the principle of a stepping motor, drives a magnetic rotor component to rotate forward and backward through a coil, converts the rotation operation of the magnetic rotor component into the up-and-down movement of a screw rod, and the screw rod drives a valve needle connected with the screw rod to ascend or descend to control the flow of refrigerant.

At present, the existing electronic expansion valve realizes the selective plugging of a valve port on a valve body through a transmission structure, and when the electronic expansion valve works, a magnetic rotor rotates and simultaneously goes up and down, the magnetic rotor can be in contact with an external valve sleeve and generates mechanical friction noise, and meanwhile, when the magnetic rotor goes up and down, the magnetic rotor can be inevitably positioned at an upper limit or a lower limit, and at the moment, the magnetic rotor moves relative to an external coil stator, so that the driving force of an external coil on the magnetic rotor is reduced, and the electronic expansion valve is blocked.

Disclosure of Invention

Therefore, the technical problem to be solved by the present invention is to provide an electronic expansion valve and an air conditioner, wherein the relative position of the magnetic rotor and the external stator coil is not changed during the process of selectively plugging the valve port by the valve needle, thereby completely avoiding the occurrence of noise caused by the lifting of the magnetic rotor and the occurrence of the locking phenomenon of the electronic expansion valve in the prior art.

In order to solve the above problems, the present invention provides an electronic expansion valve, including a valve body, a valve needle, a lifting assembly, and a lifting driving assembly, wherein the valve port is configured on the valve body, the lifting driving assembly includes a magnetic rotor, the lifting assembly includes a reciprocating member, an anti-rotation member capable of limiting rotation of the reciprocating member, and a rotation member capable of being driven by the magnetic rotor to rotate, the reciprocating member is coaxially and threadedly connected with the rotation member, and when the reciprocating member is lifted, the valve needle can selectively block the valve port.

Preferably, the magnetic rotor is coaxially sleeved on the outer peripheral wall of the rotating member.

Preferably, the valve body comprises a valve sleeve and a valve seat which are matched with each other to form a valve cavity, and the two axial ends of the rotating piece are erected in the valve sleeve through bearings.

Preferably, the rotary member has an internally threaded through hole extending axially thereof, and the reciprocating member has an external thread on an outer peripheral wall thereof, the reciprocating member being coaxially screw-coupled with the rotary member.

Preferably, be equipped with the rotation limiting face on reciprocating motion spare's the periphery wall, it has spacing piece to prevent changeing the piece, spacing piece with the matching of rotation limiting face is contradicted.

Preferably, the electronic expansion valve further comprises a screw, the reciprocating member has a first threaded hole, the screw and the reciprocating member are in threaded connection through the first threaded hole, and one end of the screw facing the valve port is connected with the valve needle.

Preferably, the end of the screw rod facing the valve port is configured with a mounting hole, and further comprises an elastic element mounted in the mounting hole, and the orifice of the mounting hole is provided with a limit block capable of limiting the tail end of the valve needle in the mounting hole.

Preferably, a ball is further arranged between the valve needle and the elastic member, a first groove is formed in the end face of the tail end of the valve needle, a ball supporting plate is connected to one end, facing the valve port, of the elastic member, a second groove is formed in the ball supporting plate, and the ball can be positioned by the first groove and the second groove.

Preferably, a first stop block is arranged on the end surface of the reciprocating member far away from the valve port, and a second stop block extending towards one side of the reciprocating member is arranged on the rotating member; and/or a third stop block is arranged on the end surface of the reciprocating element close to one side of the valve port.

The invention also provides an air conditioner which comprises the electronic expansion valve.

The invention provides an electronic expansion valve and an air conditioner, which are connected by the screw thread of the rotating part and the reciprocating part, and the rotation of the reciprocating member is restricted by the rotation preventing member, thereby ensuring that the magnetic rotor drives the rotation of the rotating member, thereby driving the reciprocating motion piece to reciprocate along the plugging motion direction of the valve needle, realizing the selective plugging of the valve port by the valve needle finally, this process is achieved without the need for the magnetic rotor and corresponding rotating member to be displaced in the axial direction of the valve body (i.e. the reciprocating direction of the reciprocating member), thereby avoiding the noise caused by the relative reciprocating motion between the magnetic rotor and the valve body in the prior art, in addition, the relative position between the magnetic rotor and the stator coil is not changed, so that the electronic expansion valve is effectively prevented from being stuck.

Drawings

FIG. 1 is a schematic cross-sectional view of an electronic expansion valve according to an embodiment of the present invention;

FIG. 2 is a perspective view of the rotary member of FIG. 1;

FIG. 3 is an internal cross-sectional view of FIG. 2;

fig. 4 is a perspective view of the reciprocating member of fig. 1;

fig. 5 is a perspective view of the anti-rotation member of fig. 1.

The reference numerals are represented as:

1. a valve body; 11. a valve port; 12. a valve housing; 13. a valve seat; 14. an inlet; 2. valve needle, 31, magnetic rotor; 41. a reciprocating member; 411. a rotation-restricting surface; 412. a first threaded hole; 413. a first stopper; 42. An anti-rotation member; 421. a limiting sheet; 422. an anti-rotation body; 423. a first through hole; 43. a rotating member; 431. a bearing; 432. an internally threaded through bore; 433. a second stopper; 44. a screw; 441. mounting holes; 442. an elastic member; 443. a ball bearing; 444. a limiting block; 445. ball bearing plate.

Detailed Description

Referring to fig. 1 to 5 in combination, according to an embodiment of the present invention, there is provided an electronic expansion valve, including a valve body 1, a valve needle 2, a lifting assembly and a lifting driving assembly, wherein the valve body 1 is configured with a valve port 11 and a corresponding inlet 14, it is understood that the valve port 11 is an outlet of the valve body 1, the lifting driving assembly includes a magnetic rotor 31 and a stator coil capable of driving the magnetic rotor 31 to rotate, the rotation of the magnetic rotor 31 is controlled by current in the stator coil, the stator coil may be disposed outside the valve body 1, for example, without particular limitation thereto, the lifting assembly includes a reciprocating member 41, an anti-rotation member 42 capable of limiting the rotation of the reciprocating member 41, and a rotating member 43 capable of being driven to rotate by the magnetic rotor 31, the reciprocating member 41 is coaxially screwed with the rotating member 43, when the reciprocating member 41 is lifted, the valve needle 2 can selectively block the valve port 11. In the technical scheme, the rotating member 43 is connected with the reciprocating member 41 by threads, and the rotation of the reciprocating member 41 is limited by the rotation-preventing member 42, so that the magnetic rotor 31 is ensured to drive the rotating member 43 to rotate, and further the reciprocating member 41 is driven to reciprocate along the plugging movement direction of the valve needle 2, and the valve needle 2 is finally selectively plugged on the valve port 11, and in this process, the magnetic rotor 31 and the corresponding rotating member 43 do not need to be displaced along the axial direction of the valve body 1 (i.e. the reciprocating direction of the reciprocating member 41) (and the reciprocating member 41 replaces the magnetic rotor 31 and the corresponding rotating member 43, so that the noise caused by the relative reciprocating movement between the magnetic rotor and the valve body in the prior art is avoided, and in addition, the relative position between the magnetic rotor 31 and the stator coil is not changed, thereby effectively preventing the electronic expansion valve from being stuck. The connection between the magnetic rotor 31 and the reciprocating member 41 may be various, for example, the magnetic rotor 31 may be coaxially sleeved on the outer circumferential wall of the rotating member 43, and further, the magnetic rotor 31 is adhered on the outer circumferential wall of the rotating member 43, so that the connection structure is very simplified.

Specifically, the valve body 1 includes a valve housing 12 and a valve seat 13 that are assembled to form a valve cavity, the valve port 11 and the inlet 14 are both configured on the valve seat 13, and both axial ends of the rotary member 43 are mounted in the valve housing 12 through bearings 431.

As a specific example of the connection of the rotary member 43 and the reciprocating member 41, the rotary member 43 has an internally threaded through hole 432 extending in the axial direction thereof, the reciprocating member 41 has an external thread on the outer peripheral wall thereof, and the reciprocating member 41 is coaxially screwed with the rotary member 43.

The specific structural style of the rotation preventing member 42 is only required to ensure that the reciprocating member 41 does not rotate when reciprocating motion occurs, and as an example of an implementation form, preferably, a rotation limiting surface 411 is arranged on the peripheral wall of the reciprocating member 41, the rotation preventing member 42 has a limiting piece 421, and the limiting piece 421 is matched and abutted against the rotation limiting surface 411. More specifically, at least two opposite rotation limiting surfaces 411 are arranged on the peripheral wall of the reciprocating member 41, at this time, two limiting pieces 421 of the rotation preventing member 42 can be correspondingly arranged, the two limiting pieces 421 are arranged opposite to each other, a space is formed between the two limiting pieces 421, and the two rotation limiting surfaces 411 of the reciprocating member 41 are completely positioned in the space and do not rotate under the interference effect of the limiting pieces 421. It will be understood that the anti-rotation member 42 should be fixedly connected to a non-rotating component such as the valve seat 13. More specifically, the anti-rotation member 42 has an anti-rotation main body 422, the limiting piece 421 is disposed on an end surface of the anti-rotation main body 422 facing to one side of the reciprocating member 41, and the anti-rotation main body 422 is configured with a first through hole 423 that runs through along an axial direction thereof.

In theory, the reciprocating member 41 may be configured on the valve needle 2, that is, it is a part of the valve needle 2, or one end of the reciprocating member 41 is connected to the valve needle 2, and as an optimized implementation, it is preferable that the electronic expansion valve further includes a screw 44, the reciprocating member 41 has a first threaded hole 412, the screw 44 is in threaded connection with the reciprocating member 41 through the first threaded hole 412, one end of the screw 44 facing the valve port 11 is connected to the valve needle 2, that is, the screw 44 or the valve needle 2 can be separated from the reciprocating member, which obviously enables flexible replacement and maintenance when any one of the components is damaged and needs to be replaced.

Further, the screw 44 is configured with a mounting hole 441 at an end facing the valve port 11, and further includes an elastic member 442 mounted in the mounting hole 441, the orifice of the mounting hole 441 has a limit block 444, the limit block 444 can limit the tail end of the valve needle 2 in the mounting hole 441, and the elastic member 442 can be a conventional spring. In this embodiment, the mounting hole 441 is provided as a guide hole for the reciprocation of the needle 2, and the elastic member 442 provides a certain flexibility when the needle 2 blocks the valve port 11, thereby preventing structural damage due to a rigid collision, and more importantly, the elastic member 442 can compensate for a processing error of each component such as the reciprocating member 41 or the screw 44.

A ball 443 is further arranged between the valve needle 2 and the elastic element 442, a first groove is arranged on a tail end face of the valve needle 2, one end of the elastic element 442 facing the valve port 11 is connected with a ball supporting plate 445, a second groove is arranged on the ball supporting plate 445, and the ball 443 can be positioned by the first groove and the second groove.

Preferably, a first stop 413 is disposed on an end surface of the reciprocating element 41 away from the valve port 11, and a second stop 433 extending toward one side of the reciprocating element 41 is disposed on the rotating element 43 to limit an upward movement stroke of the reciprocating element 41; and/or a third stopper is arranged on the end surface of the reciprocating element 41 close to the valve port 11, and correspondingly, a fourth stopper is arranged on the screw 44 to limit the downward movement stroke of the reciprocating element 41.

It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.

The present invention is not limited to the above preferred embodiments, and any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention should be included in the protection scope of the present invention. The above is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the technical principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. An electronic expansion valve is characterized by comprising a valve body (1), a valve needle (2), a lifting assembly and a lifting driving assembly, wherein the valve port (11) is constructed on the valve body (1), the lifting driving assembly comprises a magnetic rotor (31), the lifting assembly comprises a reciprocating member (41), an anti-rotation member (42) capable of limiting the rotation of the reciprocating member (41) and a rotating member (43) capable of being driven to rotate by the magnetic rotor (31), and when the reciprocating member (41) is lifted, the valve needle (2) can selectively block the valve port (11); the rotating member (43) is provided with an internally threaded through hole (432) extending in the axial direction thereof, the reciprocating member (41) is provided with an external thread on the outer peripheral wall thereof, and the reciprocating member (41) is coaxially screwed with the rotating member (43); the peripheral wall of the reciprocating motion piece (41) is provided with a rotation limiting surface (411), the rotation preventing piece (42) is provided with a limiting piece (421), and the limiting piece (421) is matched and abutted with the rotation limiting surface (411); the valve needle (2) is connected with the valve port (11) through the screw rod (44), the reciprocating element (41) is provided with a first threaded hole (412), the screw rod (44) is in threaded connection with the reciprocating element (41) through the first threaded hole (412), and one end of the screw rod (44) facing the valve port (11) is connected with the valve needle (2); a third stop block is arranged on the end surface of the reciprocating member (41) close to one side of the valve port (11), and a fourth stop block is arranged on the screw rod (44) so as to limit the downward movement stroke of the reciprocating member (41); the magnetic rotor (31) is coaxially sleeved on the outer peripheral wall of the rotating piece (43); the valve body (1) comprises a valve sleeve (12) and a valve seat (13) which are matched with each other to form a valve cavity, and two axial ends of the rotating piece (43) are erected in the valve sleeve (12) through bearings (431).

2. The electronic expansion valve according to claim 1, wherein an end of the screw (44) facing the valve port (11) is configured with a mounting hole (441), further comprising an elastic member (442) mounted in the mounting hole (441), an orifice of the mounting hole (441) having a stopper (444), the stopper (444) being capable of restraining a trailing end of the valve needle (2) in the mounting hole (441).

3. An electronic expansion valve according to claim 2, wherein a ball (443) is further disposed between the valve needle (2) and the elastic member (442), a first groove is disposed on a tail end surface of the valve needle (2), a ball support plate (445) is connected to an end of the elastic member (442) facing the valve port (11), a second groove is disposed on the ball support plate (445), and the ball (443) can be positioned by the first groove and the second groove.

4. An electronic expansion valve according to claim 1, wherein a first stopper (413) is provided on an end surface of the reciprocating member (41) on a side away from the valve port (11), and a second stopper (433) extending toward the reciprocating member (41) is provided on the rotary member (43).

5. An air conditioner comprising an electronic expansion valve, wherein the electronic expansion valve is the electronic expansion valve of any one of claims 1 to 4.