Search

CN-113062990-B - Electronic expansion valve

CN113062990BCN 113062990 BCN113062990 BCN 113062990BCN-113062990-B

Abstract

The electronic expansion valve comprises a first valve cavity and a second valve cavity, wherein the first valve cavity and the second valve cavity are respectively arranged above and below a valve opening, at least part of valve cores are arranged in the first valve cavity, and a filter element is arranged in the second valve cavity, so that when a refrigerant in the electronic expansion valve flows in a first flow direction, the refrigerant flows through the filter element after passing through a valve opening, the flow of the refrigerant after passing through the valve opening can be improved, the flow noise of the refrigerant is improved, and the requirement of some systems for improving the noise is met.

Inventors

  • Request for anonymity

Assignees

  • 浙江三花智能控制股份有限公司

Dates

Publication Date
20260505
Application Date
20191230

Claims (10)

  1. 1. An electronic expansion valve comprises a valve seat, a valve body part and a valve core, wherein the valve body part comprises a valve body, the valve body is fixedly connected with the valve seat, the valve seat comprises a valve opening, the electronic expansion valve comprises a first valve cavity (A) and a second valve cavity (B), the first valve cavity (A) is positioned on one side of the valve opening (112) which is opposite to the upper side, the second valve cavity (B) is positioned on one side of the valve opening which is opposite to the lower side, the electronic expansion valve is provided with a valve port (1121) at the valve opening part, the first valve cavity (A) can be communicated with the second valve cavity (B) through the valve port (1121), the electronic expansion valve is provided with a first interface (1211) and a second interface (1221), the first interface (1211) is communicated with the first valve cavity (A), and the second interface (1221) is communicated with the second valve cavity (B), the valve core is at least partially positioned on the first valve cavity (A) which is matched with the valve port (1121) for regulating the flow of the electronic expansion valve, and the second interface (1221) is arranged on the opposite side of the valve opening part of the valve opening (1121) and is smaller than the second interface (1221); The filter element comprises a filter screen assembly (131), the valve body part comprises the filter element, the filter screen assembly comprises a filter screen layer (1311) and a special-shaped filter screen layer (1312), the special-shaped filter screen layer is positioned in the second valve cavity or at least partially positioned in the second valve cavity, the special-shaped filter screen layer comprises a plurality of layers of stainless steel filter screens, the special-shaped filter screen layer (1312) comprises a convex part (1310) which protrudes towards the valve port and is opposite to the valve core, the special-shaped filter screen layer is in transition fit or interference fit or small clearance fit with the inner wall of the side wall part of the valve body, and the special-shaped filter screen layer is in press fit or welding or is in press fit and welding fixation; an outer cap is sleeved on the convex part (1310) of the special-shaped filter screen layer (1312) so that the outer cap is arranged opposite to the valve core, or an inner cap matched with the shape is arranged between the special-shaped filter screen layer (1312) and the filter screen layer (1311), and the inner cap is matched with the convex part; The second port (1221) is provided on the peripheral side wall of the valve body (141).
  2. 2. The electronic expansion valve of claim 1, wherein the filter being relatively close to the valve port portion comprises a distance (L1) of the filter from a bottom wall portion (1413) of the valve body being greater than a distance (L2) of the filter from the valve port portion, the distance (L2) of the filter from the valve port portion being no greater than one third of the distance (L) of the valve port portion from the bottom wall portion (1413) of the valve body.
  3. 3. The electronic expansion valve of claim 1 or 2, wherein the screen assembly is located in the second valve chamber or the screen assembly is located at least partially in the second valve chamber, wherein the screen assembly comprises at least two screen layers (1311), wherein the screen layer comprises at least three stainless steel screens or wherein the screen assembly comprises at least ten stainless steel screens or wherein the screen assembly comprises at least three stainless steel screens (1311), wherein the screen assembly comprises at least five stainless steel screens, wherein the screen assembly is a transition fit or an interference fit or a small clearance fit with an inner wall of a side wall portion of the valve body, wherein the screen layers are crimped or welded or crimped and welded together.
  4. 4. The electronic expansion valve according to claim 1 or 2, characterized in that the electronic expansion valve comprises a first connecting pipe (121) and a second connecting pipe (122), wherein the first connecting pipe is provided with the first connector (1211), the second connecting pipe is provided with the second connector (1221), the valve seat (11) further comprises a peripheral wall part, the first connecting pipe (121) and the valve seat (11) are fixedly connected at the peripheral wall part of the valve seat through welding, the first connector (1211) is directly communicated with the first valve cavity (A), the valve body comprises a flanging part (1412), the second connecting pipe (122) and the valve body are fixedly connected at the flanging part through welding, and the second connector (1221) is communicated with the second valve cavity (B).
  5. 5. The electronic expansion valve according to claim 1 or 2, characterized in that the electronic expansion valve is further provided with a diverging zone (1110) at the valve opening, the cross-sectional area of the diverging zone near the second valve chamber being larger than the cross-sectional area of the diverging zone near the valve opening, the diverging zone being relatively closer to the second valve chamber than the valve opening, the valve opening being located between the diverging zone and the first valve chamber, the diverging zone being located between the valve opening and the second valve chamber, the wall thickness (H) of the valve opening portion near the valve opening being smaller than the wall thickness (H) of the valve opening portion relatively farther from the valve opening, the wall thickness (H) of the valve opening portion of the electronic expansion valve being between 0.25mm and 0.45 mm.
  6. 6. An electronic expansion valve according to claim 3, further comprising a diverging zone (1110) at the valve mouth, wherein the cross-sectional area of the diverging zone near the second valve chamber is greater than the cross-sectional area of the diverging zone near the valve port, the diverging zone is relatively closer to the second valve chamber than the valve port, the valve port is located between the diverging zone and the first valve chamber, the diverging zone is located between the valve port and the second valve chamber, the wall thickness (H) of the valve port near the valve port is smaller than the wall thickness (H) of the valve port relatively far from the valve port, and the wall thickness (H) of the valve port of the electronic expansion valve near the valve port is between 0.25mm and 0.45 mm.
  7. 7. The electronic expansion valve according to claim 4, further comprising a diverging region (1110) at the valve port, wherein the cross-sectional area of the diverging region near the second valve chamber is larger than the cross-sectional area of the diverging region near the valve port, the diverging region is relatively closer to the second valve chamber than the valve port, the valve port is positioned between the diverging region and the first valve chamber, the diverging region is positioned between the valve port and the second valve chamber, the wall thickness (H) of the valve port near the valve port is smaller than the wall thickness (H) of the valve port relatively far from the valve port, and the wall thickness (H) of the valve port of the electronic expansion valve near the valve port is between 0.25mm and 0.45 mm.
  8. 8. The electronic expansion valve according to claim 1 or 2, characterized in that the electronic expansion valve is further provided with a diverging zone (1110) at the valve opening, the diverging zone being substantially trumpet-shaped, the cross-sectional area of the diverging zone near the second valve chamber being larger than the cross-sectional area of the diverging zone near the valve port; the valve port is positioned between the diverging region and the first valve cavity, the diverging region is positioned between the valve port and the second valve cavity, the wall thickness (H) of the valve port part near the valve port is smaller than the wall thickness (H) of the valve port part far away from the valve port relatively, the wall thickness (H) of the valve port part of the electronic expansion valve near the valve port is between 0.25mm and 0.45mm, the valve port part is gradually increased from the part relatively near the valve port (1121) to the part far away from the valve port (1121), the valve port part comprises a part, the lower wall of the valve port part forms an angle alpha with the extension line of a cross section formed by the center, alpha is smaller than or equal to 100 degrees and smaller than 140 degrees or 110 degrees and smaller than or equal to 130 degrees, the valve body is made of stainless steel or pipe material and is formed by stretching or pressing or extruding, the wall thickness (H) of the valve body is smaller than 1mm, and the distance from the bottom wall (1123) of the valve body is equal to two times the diameter (H) of the valve port (122) of the valve port part (2).
  9. 9. The electronic expansion valve according to claim 3, further comprising a diverging region (1110) at the valve port, the diverging region being substantially horn-shaped, the diverging region being larger in cross-sectional area near the second valve chamber than the diverging region near the valve port, the valve port being located between the diverging region and the first valve chamber, the diverging region being located between the valve port and the second valve chamber, the diverging region being closer to the second valve chamber than the valve port, the valve port portion having a wall thickness (H) at a position near the valve port that is smaller than a wall thickness (H) at a position relatively far from the valve port than the valve port portion, the valve port portion of the electronic expansion valve having a wall thickness (H) at a position near the valve port that is between 0.25mm and 0.45mm, the valve port portion being gradually increased from a position relatively near the valve port (1121) to a position far from the valve port (1121), the valve port portion comprising a portion whose lower wall forms an angle α between the valve port and the second valve chamber and the valve port, the wall thickness being smaller than or equal to or smaller than or equal to about 100 ° than a diameter (1) of the valve body formed by a of the sheet material (steel or equal to or smaller than the diameter, the valve body) and equal to or smaller than the diameter (122) of the valve body) is formed by the sheet material.
  10. 10. The electronic expansion valve according to claim 4, further comprising a diverging region (1110) at the valve port, the diverging region being substantially horn-shaped, the diverging region being larger in cross-sectional area near the second valve chamber than the diverging region near the valve port, the valve port being located between the diverging region and the first valve chamber, the diverging region being located between the valve port and the second valve chamber, the diverging region being closer to the second valve chamber than the valve port, the valve port portion having a wall thickness (H) at a position near the valve port that is smaller than a wall thickness (H) at a position relatively far from the valve port than the valve port portion, the valve port portion of the electronic expansion valve having a wall thickness (H) at a position near the valve port that is between 0.25mm and 0.45mm, the valve port portion being gradually increased from a position relatively near the valve port (1121) to a position far from the valve port (1121), the valve port portion comprising a portion whose lower wall forms an angle α between the valve port and the second valve chamber and the valve port, the wall thickness being smaller than or equal to or smaller than or equal to about 100 ° than a diameter (1) of the valve body formed by a of the sheet material, the valve body (122 °) being formed by the diameter of the valve body or the sheet material, and being equal to or smaller than or equal to or smaller than the diameter (2) of the diameter).

Description

Electronic expansion valve [ Field of technology ] The invention relates to the technical field of refrigeration control, in particular to an electronic expansion valve. [ Background Art ] The refrigerating system comprises a compressor, a throttling element, two heat exchangers and other parts, wherein the throttling element can adopt an electronic expansion valve for throttling adjustment of a refrigerant, and the electronic expansion valve can realize relatively accurate control to improve the energy efficiency of the system. When the refrigerant passes through the electronic expansion valve, a certain noise may be generated. The improvement of the noise of the refrigerant passing through the electronic expansion valve is a technical subject which has been studied by the related technicians of the electronic expansion valve and the refrigeration system for a long time. [ Invention ] The application aims to provide an electronic expansion valve, which is used for solving the problem of noise caused by refrigerant flowing through the electronic expansion valve. In order to achieve the above purpose, the following technical scheme is adopted: the electronic expansion valve comprises a valve seat, a valve body part and a valve core, wherein the valve body part comprises a valve body, the valve body is fixedly connected with the valve seat, the valve seat comprises a valve opening, the electronic expansion valve comprises a first valve cavity A and a second valve cavity B, the first valve cavity A is positioned on one side of the valve opening opposite to the upper side, the second valve cavity B is positioned on one side of the valve opening opposite to the lower side, the electronic expansion valve is provided with a valve opening at the valve opening part, the first valve cavity A can be communicated with the second valve cavity B through the valve opening, the electronic expansion valve is provided with a first interface and a second interface, the first interface is communicated with the first valve cavity, the second interface is communicated with the second valve cavity, the valve core is at least partially positioned in the first valve cavity, the valve core is matched with the valve opening to regulate the flow of the electronic expansion valve, the diameter D of the valve opening is smaller than the diameter of the second interface, the diameter of the second interface is smaller than the diameter of the second valve cavity, the electronic expansion valve is also arranged below the electronic expansion valve opening part, the filter element is close to the valve opening opposite to the valve opening, and the filter element is arranged below the valve opening. The first valve cavity and the second valve cavity are arranged on two sides of the valve port of the electronic expansion valve, and the filtering piece is arranged in the flow passage between the valve port and the second connector, and is relatively close to the valve port part, so that when the electronic expansion valve is in a first flow direction, the refrigerant throttled by the valve port can pass through the filtering piece, the flowing state of the throttled refrigerant in the first flow direction can be improved, and the noise of the refrigerant passing through the electronic expansion valve from the direction is improved. [ Description of the drawings ] FIG. 1 is a schematic view of an electronic expansion valve according to a first embodiment of the present application; FIG. 2 is an enlarged schematic view of a portion of the electronic expansion valve of FIG. 1; FIG. 3 is a schematic partial cross-sectional view of another embodiment of the electronic expansion valve of FIG. 1; FIG. 4 is a schematic partial cross-sectional view of another embodiment electronic expansion valve; FIG. 5 is a schematic cross-sectional view of another embodiment of an electronic expansion valve; FIG. 6 is a schematic partial cross-sectional view of another embodiment electronic expansion valve; Fig. 7 to 9 are schematic views of the flow blocking member shown in fig. 1, fig. 7 is a schematic cross-sectional view, fig. 8 is a schematic top view, and fig. 9 is a schematic perspective view; FIG. 10 is a schematic cross-sectional view of an electronic expansion valve of a second embodiment; FIG. 11 is a schematic cross-sectional view of yet another construction of the second embodiment; FIG. 12 is a schematic view showing a partial structure of an electronic expansion valve including a valve body and a valve seat portion according to still another embodiment; Fig. 13 to 15 are partial schematic structural views of the electronic expansion valve. In the figures, the valve seats 11, 11a, 11b, 11c and 11 'are respectively formed by the gradually expanding areas of 1110, 112', 112a, 112b and 112c valve openings, 1121 valve openings and 1122 on the lower walls, 112c1 and 11221, and 112c2 and 11222 on the second parts 121, A first nipple, 122 a second nipple, 1