CN110792874A

CN110792874A - Electronic expansion valve

Info

Publication number: CN110792874A
Application number: CN201810891124.1A
Authority: CN
Inventors: 蔡志超; 张显磊
Original assignee: TIANJIN HUAXIN MACHINERY CO Ltd
Current assignee: TIANJIN HUAXIN MACHINERY CO Ltd
Priority date: 2018-08-01
Filing date: 2018-08-01
Publication date: 2020-02-14

Abstract

The present invention relates to an electronic expansion valve. An electronic expansion valve comprising: a valve body for throttling the refrigerant; the inlet pipe is connected with the valve body; and an adsorption device arranged in the inlet pipe and used for adsorbing impurities. Above-mentioned electronic expansion valve, adsorption equipment set up in the admission pipe, can adsorb the impurity that the refrigerant drove when flowing to can reduce or prevent that impurity from advancing the pipe and getting into in the valve body.

Description

Electronic expansion valve

Technical Field

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

Background

The electronic expansion valve is widely applied to a refrigerator and an air-conditioning refrigeration system and used for adjusting the flow of a refrigerant in the refrigeration system. The general electronic expansion valve for the refrigerator is easy to generate scrap iron due to the application of a Bundy tube (galvanized steel tube), and has the risk of clamping.

Disclosure of Invention

Based on this, there is a need for an improved electronic expansion valve.

The application provides an electronic expansion valve, includes:

a valve body for throttling the refrigerant;

the inlet pipe is connected with the valve body; and

and the adsorption device is arranged in the inlet pipe and is used for adsorbing impurities.

In one embodiment, the absorbing means is a permanent magnet.

In one embodiment, the electronic expansion valve further comprises a limiting device, and the limiting device is located between the adsorption device and the inner wall of the inlet pipe and used for limiting the radial movement of the permanent magnet in the inlet pipe.

In one embodiment, the limiting device is matched with the inlet pipe, the limiting device defines an accommodating space, and the limiting device is located in the accommodating space and matched with the accommodating space.

In one embodiment, the limiting device is a spring, and the spring is sleeved on the limiting device.

In one embodiment, the inlet pipe comprises:

a first section, the adsorption device being located at the first section;

a second section connected to one end of the first section; and

a third section connected to the other end of the first section;

the inner walls of the second section and the third section are protruded from the inner wall of the first section inwards along the radial direction of the inlet pipe so as to limit the axial movement of the adsorption device in the inlet pipe.

In one embodiment, the adsorption device is provided with a through hole; and/or the presence of a gas in the gas,

and a through hole is formed between the adsorption device and the inner wall of the inlet pipe.

In one embodiment, the cross section of the adsorption device is polygonal.

In one embodiment, the suction device comprises a first portion and a second portion, the second portion intersecting the first portion.

In one embodiment, the adsorption device is a porous structure.

Drawings

FIG. 1 is a schematic structural diagram of an electronic expansion valve according to an embodiment;

FIG. 2 is a partial cross-sectional view of an inlet tube of the electronic expansion valve of FIG. 1;

fig. 3 is a sectional view a-a of the electronic expansion valve of fig. 1;

fig. 4 is a B-B sectional view of the electronic expansion valve of fig. 1;

FIG. 5 is a partial cross-sectional view of an inlet tube of an electronic expansion valve according to another embodiment;

FIG. 6 is a schematic structural diagram of an adsorption unit of an electronic expansion valve according to another embodiment;

FIG. 7 is a schematic cross-sectional view of an adsorption unit of an electronic expansion valve according to yet another embodiment;

FIG. 8 is a schematic structural view of an adsorption unit of an electronic expansion valve according to yet another embodiment;

fig. 9 is a schematic structural diagram of an adsorption device of an electronic expansion valve according to yet another embodiment.

Detailed Description

To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the invention of the present application are given in the accompanying drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.

Referring to fig. 1, an electronic expansion valve 100 is provided in an embodiment of the present application. The electronic expansion valve 100 is used for being installed in a refrigeration system, such as an air conditioner, a refrigerator, and the like. The electronic expansion valve 100 includes a valve body 110, an inlet pipe 120 connected to the valve body 110, an outlet pipe 130 connected to the valve body 110, and an adsorption device 140.

A valve needle (not shown) and a valve port (not shown) may be disposed within the valve body 110. A clearance is arranged between the valve needle and the valve port. When the electronic expansion valve 100 is in operation, the refrigerant can flow into the valve body 110 through the inlet pipe 120, flow out of the valve body 110 from the gap between the valve needle and the valve port, and flow out through the outlet pipe 130. When the valve body 110 is used for throttling the refrigerant, the valve needle can be driven to act through the actuating element to adjust the gap between the valve needle and the valve port, so that the flow area of the refrigerant is adjusted to realize throttling.

The material used for the inlet pipe 120 and the material used for the outlet pipe 130 can be red copper, which is convenient for welding with other pipelines in the refrigeration system.

The adsorption device 140 is disposed in the inlet pipe 120, and can adsorb impurities driven by the flowing refrigerant, and reduce or prevent the impurities from entering the valve body 110 from the inlet pipe 120, thereby reducing or preventing the electronic expansion valve 100 from being jammed and worn, and facilitating the safe operation of the refrigeration system.

In one embodiment, the adsorption device 140 may be a permanent magnet. The permanent magnet is easy to adsorb iron filings, so that the iron filings driven by the flowing refrigerant can be adsorbed, and the phenomena of clamping and abrasion of the electronic expansion valve 100 caused by the iron filings can be reduced or prevented. The permanent magnet is not easy to lose magnetism and magnetize, so that the permanent magnet has good capability of adsorbing scrap iron for a long time, and further the electronic expansion valve 100 can be prevented from being clamped for a long time.

Referring to fig. 1-3, in one embodiment, electronic expansion valve 100 further comprises a limiting device 150. The limiting device 150 is located between the adsorption device 140 and the inner wall of the inlet pipe 120, so as to limit the radial movement of the adsorption device 140 in the inlet pipe 120, thereby reducing or preventing the radial vibration of the adsorption device 140 in the inlet pipe 120, and further reducing the noise generated by the vibration of the adsorption device 140 and reducing the abrasion between the adsorption device 140 and the inner wall of the inlet pipe 120.

In one embodiment, the position-limiting device 150 is adapted to the inlet tube 120, the position-limiting device 150 has a receiving space, and the absorption device 140 is located in the receiving space and adapted to the receiving space.

Referring to fig. 2 and 3, the position limiting device 150 may be a spring. The spring is provided with a plurality of spring coils which enclose an inner hole of the spring, and the inner hole of the spring defines an accommodating space. The spring is sleeved on the adsorption device 140, so that the adsorption device 140 is located in the accommodating space. Referring to fig. 3, the inner diameter d1 of the spring is approximately equal to the largest dimension of the cross-section of the suction device 140, so that the suction device 140 fits into the spring, thereby limiting radial movement of the suction device 140 in the spring. The outer diameter d2 of the spring is approximately equal to the inner diameter of the inlet tube 120, so that the spring fits into the inlet tube 120, thereby limiting the radial movement of the spring in the inlet tube 120 and, in turn, further limiting the radial movement of the suction device 140 in the inlet tube 120. Further, the spring is provided with a plurality of coils, and the coils are spaced from each other, so that the contact area between the spring and the adsorption device 140 is small, and the abrasion of the adsorption device 140 can be reduced.

It will be appreciated that the spacing device 150 may also be other devices, such as a sponge. The sponge can be filled between the adsorption device 140 and the inner wall of the inlet pipe 120, the radial movement of the adsorption device 140 in the inlet pipe 120 can be limited, and meanwhile, the sponge is soft, so that the vibration of the adsorption device 140 can be buffered, and the abrasion of the adsorption device 140 can be reduced. The position limiting device 150 may also be a cylinder, and the suction device 140 may be placed in the cylinder, so as to limit the movement of the suction device 140 in the radial direction of the cylinder. The cylinder is placed in the inlet tube 120 so as to limit the radial movement of the cylinder in the inlet tube 120, and thus the radial movement of the adsorption device 140 in the inlet tube 120.

Referring to FIG. 2, in one embodiment, the inlet tube 120 includes a first section 121, a second section 122, and a third section 123 in communication with one another. The second section 122 is connected to one end of the first section 121, and the third section 123 is connected to the other end of the first section 121. The adsorption device 140 is located within the first section 121. Referring to fig. 3 and 4, the cross section of the adsorption device 140 is formed in a rectangular shape, and the inner wall 123a of the third section 123 protrudes inward from the inner wall 121a of the first section 121 in the radial direction of the inlet pipe 120, so that four corners of the rectangular cross section of the adsorption device 140 are blocked, thereby preventing the adsorption device 140 from being detached from the first section 121 and entering the third section 123. Similarly, the inner wall 122a of the second section 122 protrudes inward from the inner wall 121a of the first section 121 in the radial direction of the inlet pipe 120, thereby preventing the adsorption device 140 from being detached from the first section 121 and entering the second section 122. By making the inner wall 122a of the second section 122 and the inner wall 123a of the third section 123 protrude from the inner wall 121a of the first section 121, the movement of the suction device 140 in the axial direction of the inlet pipe 120 is limited, and the suction device 140 and the limiting device 150 are prevented from moving out of the first section 121.

In the process of manufacturing the electronic expansion valve, the adsorption device 140 may be placed in the inlet pipe 120 having a uniform pipe diameter, and then the outer wall of the second section 122 and the outer wall of the third section 123 are rolled, so that the outer wall of the second section 122 and the outer wall of the third section 123 are inwardly recessed, and the inner wall 122a of the second section 122 and the inner wall 123a of the third section 123 are inwardly protruded from the inner wall 121a of the first section 121.

In other embodiments, the piles may be used to apply force to the outer wall of the second section 122 and the outer wall of the third section 123, so that the inner wall 122a of the second section 122 and the inner wall 123a of the third section 123 protrude inwards from the inner wall 121a of the first section 121 along the radial direction of the inlet pipe 120, and at this time, the cross sections of the inner wall 122a of the second section 122 and the inner wall 123a of the third section 123 are arc-shaped, as shown in fig. 5.

Referring to fig. 3 and 4, a through hole 101 is formed between the adsorption device 140 and the inner wall of the inlet pipe 120, so that the refrigerant can pass through the through hole 101 and flow toward the valve body 110. In the present embodiment, the cross section of the suction device 140 is rectangular, and four sides of the rectangle and the inner wall of the inlet pipe 120 enclose the through hole 101.

Referring to fig. 6, in another embodiment, the adsorption device 140 may also be a triangular prism having a through hole 101 formed between a side surface thereof and an inner wall of the inlet pipe 120. It is understood that the cross-section of the adsorption device 140 may also enclose a polygon such as a pentagon, a hexagon, etc. The polygonal side surface has a large area and is liable to adsorb impurities.

Referring to fig. 7, in one embodiment, the through holes 102 are formed on the adsorption device 140, so that the surface area of the adsorption device 140 is increased, the adsorption device 140 can adsorb impurities more easily, and the refrigerant can pass through the through holes 102 conveniently. The through hole 102 may be a circular through hole as shown in fig. 7, or may be a square through hole or another through hole. As shown in fig. 7, the through hole 102 may penetrate the upper and lower bottom surfaces of the adsorption device 140 up and down. Further, a through hole 102 may be opened from a side surface of the adsorption device 140 and communicate with the through hole 101.

Referring to fig. 8, in a further embodiment, the suction device 140 includes a first portion 141 and a second portion 142, the second portion 142 intersecting and being perpendicular to the first portion 141, the suction device 140 having a cross-section substantially in the shape of a cross. Thus, the surface area of the adsorption device 140 is increased, so that the adsorption device 140 can adsorb impurities more easily, and meanwhile, the through hole 101 formed by the adsorption device 140 and the inner wall of the inlet pipe 120 is larger, so that the refrigerant can pass through the through hole 101 conveniently.

Referring to fig. 9, in still another embodiment, the adsorption device 140 has a porous structure having a plurality of pores, which greatly increases the surface area of the adsorption device 140 and facilitates the adsorption of impurities.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. An electronic expansion valve, comprising:

a valve body for throttling the refrigerant;

the inlet pipe is connected with the valve body; and

2. An electronic expansion valve according to claim 1, wherein the absorption means is a permanent magnet.

3. The electronic expansion valve according to claim 1 or 2, further comprising a limiting device located between the adsorption device and the inner wall of the inlet pipe to limit the radial movement of the permanent magnet in the inlet pipe.

4. The electronic expansion valve according to claim 3, wherein the position-limiting device is adapted to the inlet tube, the position-limiting device defines an accommodating space, and the position-limiting device is located in the accommodating space and adapted to the accommodating space.

5. An electronic expansion valve according to claim 4, wherein the limiting means is a spring, which is sleeved on the limiting means.

6. An electronic expansion valve according to claim 1 or 2, wherein the inlet conduit comprises:

a first section, the adsorption device being located at the first section;

a second section connected to one end of the first section; and

a third section connected to the other end of the first section;

7. An electronic expansion valve according to claim 1 or 2,

the adsorption device is provided with a through hole; and/or the presence of a gas in the gas,

8. The electronic expansion valve according to claim 7, wherein the cross-section of the adsorption means is polygonal.

9. An electronic expansion valve according to claim 7, wherein the adsorption means comprises a first portion and a second portion, the second portion intersecting the first portion.

10. An electronic expansion valve according to claim 1, wherein the absorption means is a porous structure.