Production mold of impeller middle section, cross-flow fan wheel, impeller middle section and air conditioner

Abstract

The utility model discloses a production mould of impeller middle section, cross flow fan wheel and impeller middle section and air conditioner. The production mould of impeller middle section includes: fixed mould and movable mould, the fixed mould with movable mould defines the cavity between, one of fixed mould with movable mould has the flow channel, the flow channel is communicated with the cavity through the sprue, wherein the cavity includes annular baffle cavity, recess and multiple blade cavities, the blade cavity with recess all are communicated with the annular baffle cavity, multiple blade cavities are evenly spaced along the circumference of the annular baffle cavity, on the radial of the annular baffle cavity, the distance of sprue from recess is less than the distance of sprue from blade cavity. Through utilizing the production mould of the utility model, can pour out the impeller middle section of high structural strength, not easy to crack, not easy to damage, dynamic balance performance is good.

Description

Technical Field

[0001] This utility model relates to the field of home appliances, specifically to a production mold for an impeller middle section, and also to a cross-flow fan and its impeller middle section, and an air conditioner having the cross-flow fan. Background Technology

[0002] Air conditioning systems in related technologies utilize cross-flow fans to deliver cool or warm air into a room for cooling or heating. The cross-flow fan comprises multiple sections, each injection-molded. Existing cross-flow fan sections are prone to cracking during drop tests. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in related technologies. To this end, this utility model proposes a production mold for the impeller middle section, a cross-flow fan impeller and its impeller middle section, and an air conditioner.

[0004] The production mold for the impeller middle section of this utility model includes: a fixed mold and a moving mold, with a cavity defined between the fixed mold and the moving mold. One of the fixed mold and the moving mold has a flow channel, which communicates with the cavity through a gate. The cavity includes an annular partition cavity, a groove, and multiple blade cavities. Both the blade cavities and the groove are communicated with the annular partition cavity. The multiple blade cavities are evenly spaced along the circumference of the annular partition cavity. In the radial direction of the annular partition cavity, the distance from the gate to the groove is less than the distance from the gate to the blade cavity.

[0005] By making the cavity include a groove that communicates with the annular partition cavity and the distance between the gate and the groove is less than the distance between the gate and the blade cavity, the protrusion formed by the groove can be brought close to the corresponding part of the annular partition gate. In this way, the thickness near the corresponding part of the annular partition gate can be increased by the protrusion, thereby improving the structural strength of the corresponding part of the annular partition gate. This makes it less likely for the corresponding part of the impeller gate to crack or be damaged after the impeller middle section falls.

[0006] Furthermore, by including grooves in the cavity, turbulence can be formed by the grooves when casting the impeller middle section using the production mold. This increases the flowability of the material near the gate in the cavity, preventing the material near the gate from solidifying in an orderly manner. Consequently, it prevents the internal part of the annular baffle corresponding to the gate from having pores, making it less likely for the impeller middle section to fall and for the corresponding part of the gate to crack or be damaged.

[0007] Furthermore, the position of the groove in the production mold can be adjusted according to the common unbalance direction of the dynamic balance of the cross-flow impeller, so as to change the position of the protrusion and thus improve the dynamic balance of the impeller middle section and the cross-flow impeller.

[0008] Therefore, by utilizing the production mold of this utility model, it is possible to cast impeller middle sections that have high structural strength, are not prone to cracking or damage, and have good dynamic balance performance.

[0009] Optionally, the blade cavity and the groove are located on the same side of the annular septum cavity in the axial direction.

[0010] Optionally, the flow channel includes a main flow channel and multiple branch flow channels, the multiple branch flow channels are connected to the main flow channel, the grooves are multiple and evenly spaced along the circumference of the annular partition cavity, the gates are multiple and correspond to the grooves in the radial direction of the annular partition cavity, the multiple gates correspond to the multiple branch flow channels, and the branch flow channels are connected to the annular partition cavity through the corresponding gates.

[0011] Optionally, the groove is located inside the blade cavity in the radial direction of the annular septum cavity.

[0012] Optionally, the projection of the groove on the axial direction of the annular partition cavity is a streamlined shape extending circumferentially along the annular partition cavity.

[0013] Optionally, the cross-sectional area of ​​the groove gradually decreases axially away from the annular diaphragm cavity.

[0014] The impeller middle section of the cross-flow wind turbine of this utility model is made using the production mold of the impeller middle section of this utility model. The impeller middle section of the cross-flow wind turbine of this utility model includes: an annular partition plate, the annular partition plate having a protrusion; and multiple blades, the multiple blades being disposed on the annular partition plate and arranged at intervals along the circumference of the annular partition plate.

[0015] By setting a protrusion in the annular partition, the thickness near the gate of the annular partition can be increased, thereby improving the structural strength of the gate-corresponding part of the annular partition. This makes the gate-corresponding part less prone to cracking and damage after the impeller middle section falls.

[0016] Furthermore, when casting the impeller middle section using the production mold, the groove used to form the protrusion can generate turbulence, thereby increasing the feed flow at the adjacent gate of the cavity, so as to prevent the material near the gate from solidifying in an orderly manner, and thus prevent the internal part of the annular baffle corresponding to the gate from having pores, so that the impeller middle section will not easily crack or be damaged after falling.

[0017] Furthermore, the position of the groove in the production mold can be adjusted according to the common unbalance direction of the dynamic balance of the cross-flow impeller, so as to change the position of the protrusion and thus improve the dynamic balance of the impeller middle section and the cross-flow impeller.

[0018] Therefore, the impeller middle section of the cross-flow wind turbine of this utility model has the advantages of high structural strength, not easy to crack, not easy to be damaged, and good dynamic balance performance.

[0019] Optionally, the annular partition includes a first end face and a second end face opposite each other in its axial direction, and the protrusion and the blade are disposed on the same one of the first end face and the second end face.

[0020] Optionally, the protrusions are multiple and evenly spaced along the circumference of the annular partition.

[0021] Optionally, the protrusion is located inside the blade in the radial direction of the annular septum.

[0022] Optionally, the projection of the protrusion on the axial direction of the annular partition is a streamlined shape extending circumferentially along the annular partition.

[0023] Optionally, the cross-sectional area of ​​the protrusion gradually decreases in the axial direction of the annular partition away from the annular partition.

[0024] The cross-flow wind turbine of this utility model includes multiple impeller sections, which are connected sequentially along the axial direction of the annular partition.

[0025] The cross-flow wind turbine of this invention has the advantages of high structural strength, resistance to cracking and damage, and good dynamic balance performance.

[0026] The air conditioner of this invention includes a cross-flow fan wheel as described in this invention.

[0027] The air conditioner of this invention has the advantages of high structural strength of the cross-flow fan, the cross-flow fan is not easy to crack or be damaged, and the cross-flow fan has good dynamic balance performance. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of the cross-flow fan wheel according to an embodiment of the present utility model;

[0029] Figure 2 This is a structural schematic diagram of the impeller middle section of the cross-flow wind turbine according to an embodiment of the present utility model;

[0030] Figure 3 yes Figure 2 Enlarged view of region A in the image;

[0031] Figure 4 This is a structural schematic diagram of the impeller middle section of the cross-flow wind turbine according to an embodiment of the present utility model;

[0032] Figure 5 This is a structural schematic diagram of the impeller middle section of the cross-flow wind turbine according to an embodiment of the present utility model;

[0033] Figure 6 This is a cross-sectional view of the middle section of the impeller of the cross-flow wind turbine according to an embodiment of the present utility model;

[0034] Figure 7 yes Figure 6 Enlarged view of region B in the image;

[0035] Figure 8 This is a partial structural schematic diagram of the production mold for the impeller middle section according to an embodiment of the present utility model;

[0036] Figure 9 yes Figure 8 A magnified view of region C in the image. Detailed Implementation

[0037] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0038] The production mold 200 for the impeller middle section 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings. Figure 8 and Figure 9 As shown, the production mold 200 of the impeller middle section 100 according to an embodiment of the present utility model includes a fixed mold 210 and a moving mold 220.

[0039] A cavity 230 is defined between a fixed mold 210 and a moving mold 220. One of the fixed mold 210 and the moving mold 220 has a runner 240. The runner 240 communicates with the cavity 230 through a gate 241. The cavity 230 includes an annular partition cavity 231, a groove 232, and a plurality of blade cavities 233. Each blade cavity 233 communicates with the annular partition cavity 231. The groove 232 communicates with the annular partition cavity 231. The plurality of blade cavities 233 are evenly spaced along the circumference of the annular partition cavity 231. In the radial direction of the annular partition cavity 231, the distance from the gate 241 to the groove 232 is less than the distance from the gate 241 to the blade cavity 233, that is, the gate 241 is closer to the groove 232 than to the blade cavity 233.

[0040] The outlet of the injection nozzle 250 of the injection molding machine is connected to the runner 240 so that the injection nozzle 250 can deliver molten material into the runner 240. The molten material flows in the runner 240 and enters the cavity 230 through the gate 241. The molten material solidifies in the cavity 230 to form the impeller section 100 of the cross-flow fan 1000.

[0041] This utility model also discloses the impeller middle section 100 of a cross-flow wind turbine 1000 manufactured using a production mold 200. For example... Figures 1-7As shown, the impeller middle section 100 of the cross-flow wind turbine 1000 according to an embodiment of the present invention includes an annular partition 2 and a plurality of blades 3. The annular partition 2 is provided with a protrusion 1, and the plurality of blades 3 are disposed on the annular partition 2 and arranged at intervals along the circumference of the annular partition 2.

[0042] Specifically, the annular diaphragm cavity 231 is used to form the annular diaphragm 2, the blade cavity 233 is used to form the blade 3, and the groove 232 is used to form the protrusion 1.

[0043] By making the cavity 230 include a groove 232 that communicates with the annular partition cavity 231 and the distance between the gate 241 and the groove 232 is less than the distance between the gate 241 and the blade cavity 233, the protrusion 1 formed by the groove 232 can be brought close to the gate corresponding portion 23 of the annular partition 2. In this way, the thickness near the gate corresponding portion 23 of the annular partition 2 can be increased by the protrusion 1, thereby improving the structural strength of the gate corresponding portion 23 of the annular partition 2. This makes it less likely for the gate corresponding portion 23 to crack or be damaged after the impeller middle section 100 falls.

[0044] Furthermore, by including grooves 232 in the cavity 230, when casting the impeller middle section 100 using the production mold 200, turbulence can be formed by utilizing the grooves 232, thereby increasing the feed flow at the adjacent gate 241 of the cavity 230, so as to prevent the material near the gate 241 from solidifying in an orderly manner, thereby preventing the gate-corresponding part 23 of the annular partition 2 from having pores, so that the gate-corresponding part 23 is less likely to crack or be damaged after the impeller middle section 100 falls.

[0045] Furthermore, the position of the groove 232 in the production mold 200 can be adjusted according to the common unbalance direction of the dynamic balance of the cross-flow impeller, so as to change the position of the protrusion 1, thereby improving the dynamic balance of the impeller middle section 100 and the cross-flow impeller 1000.

[0046] Therefore, the impeller middle section 100 of the cross-flow wind turbine 1000 according to the present invention has advantages such as high structural strength, resistance to cracking, resistance to damage, and good dynamic balance performance. Accordingly, by using the production mold 200 according to the present invention, the impeller middle section 100 with high structural strength, resistance to cracking, resistance to damage, and good dynamic balance performance can be cast.

[0047] like Figures 1-7 As shown, the impeller middle section 100 of the cross-flow wind turbine 1000 according to an embodiment of the present invention includes an annular partition 2 and a plurality of blades 3.

[0048] The annular partition 2 includes a first end face 21 and a second end face 22 that are axially opposed to each other. A plurality of blades 3 are spaced apart circumferentially on the first end face 21 of the annular partition 2, and a protrusion 1 is provided on the first end face 21. That is, the protrusion 1 and the blades 3 are provided on the same one of the first end face 21 and the second end face 22. The axial direction of the annular partition 2 is as follows... Figure 6 and Figure 7 As indicated by arrow E in the diagram. This allows for a more rational structure in the impeller middle section 100.

[0049] Accordingly, the blade cavity 233 and the groove 232 are located on the same side of the annular diaphragm cavity 231 in the axial direction. The axial direction of the annular diaphragm cavity 231 is as follows: Figure 9 As shown by arrow D in the diagram.

[0050] The annular partition 2 has a gate-corresponding portion 23. When the impeller middle section 100 is cast using the production mold 200, the gate-corresponding portion 23 is opposite to and closest to the gate 241 of the production mold 200. That is, the portion of the cavity 230 closest to the gate 241 and opposite to the gate 241 forms the gate-corresponding portion 23.

[0051] like Figures 2-4 , Figure 6 and Figure 7 As shown, the protrusion 1 and the corresponding portion 23 of the gate are arranged opposite to each other and spaced apart in the radial direction of the annular partition 2. Accordingly, as Figure 8 and Figure 9 As shown, the groove 232 and the gate 241 are arranged opposite each other radially in the annular partition cavity 231. The radial direction of the annular partition 2 is as follows: Figure 7 As shown by arrow F in the diagram.

[0052] This not only further improves the structural strength of the impeller middle section 100, especially the structural strength of the gate corresponding part 23 and its vicinity, but also further increases the feed flow of the cavity 230 near the gate 241, so as to further prevent the internal structure of the gate corresponding part 23 and its vicinity of the annular partition 2 from having pores, thereby making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0053] like Figure 2 , Figure 4 and Figure 5 As shown, there are multiple protrusions 1, which are evenly spaced along the circumference of the annular partition 2. There are also multiple gate-corresponding portions 23, which are evenly spaced along the circumference of the annular partition 2. The multiple protrusions 1 and the multiple gate-corresponding portions 23 are opposite each other in the radial direction of the annular partition 2.

[0054] Accordingly, the flow channel 240 includes a main flow channel and multiple branch flow channels, which are connected to the main flow channel. The injection nozzle 250 of the injection molding machine delivers molten material into the main flow channel. The molten material flows within the main flow channel and then enters the multiple branch flow channels.

[0055] There are multiple grooves 232 and multiple gates 241. The multiple grooves 232 are evenly spaced along the circumference of the annular partition cavity 231, and the multiple gates 241 are also evenly spaced along the circumference of the annular partition cavity 231. The multiple grooves 232 and multiple gates 241 correspond to each other (one-to-one) in the radial direction of the annular partition cavity 231. The radial direction of the annular partition cavity 231 is as follows: Figure 9 As indicated by arrow G in the diagram.

[0056] Multiple gates 241 correspond to multiple runners, and the runners are connected to the annular baffle cavity 231 through their respective gates 241. The molten material in the runners enters the annular baffle cavity 231 through the corresponding gates 241, and the molten material solidifies in the cavity 230 to form the impeller middle section 100 of the cross-flow impeller 1000.

[0057] By setting multiple runners and multiple gates 241, not only can the molten material enter the annular baffle cavity 231 (cavity 230) more quickly to improve the production efficiency of the impeller middle section 100, but the molten material can also enter the annular baffle cavity 231 (cavity 230) more evenly to further improve the quality of the impeller middle section 100.

[0058] Furthermore, by providing multiple grooves 232 in the radial direction of the annular partition cavity 231 corresponding to multiple gates 241, the feed flow of the cavity 230 near the gates 241 is further increased, so as to further prevent the interior of the gate-corresponding part 23 of the annular partition 2 and its surrounding part from having pores, thereby making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0059] like Figures 2-4 , Figure 6 and Figure 7 As shown, the protrusion 1 is radially adjacent to the corresponding portion 23 of the gate in the annular partition 2. Accordingly, as Figure 8 and Figure 9 As shown, the groove 232 is radially adjacent to the gate 241 of the flow channel 240 in the annular partition cavity 231.

[0060] This allows the protrusion 1 to more effectively increase the thickness near the gate-corresponding portion 23 (gate location) of the annular partition 2, thereby further improving the structural strength of the gate-corresponding portion 23 and its vicinity of the annular partition 2, making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage. Furthermore, it allows the material to immediately generate turbulence after passing through the gate, thereby further increasing the feed flow at the adjacent gate 241 of the cavity 230, further preventing internal porosity in the gate-corresponding portion 23 and its vicinity of the annular partition 2, thus making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0061] like Figure 2 as well as Figures 4-7 As shown, in the radial direction of the annular partition 2, the protrusion 1 is located inside the blade 3. Correspondingly, in the radial direction of the annular partition cavity 231, the groove 232 is located inside the blade cavity 233. This allows for a more rational structure of the impeller intermediate section 100 and the production mold 200.

[0062] Optionally, the gate corresponding portion 23 is located on the inner circumferential surface 24 of the annular partition 2, and the protrusion 1 is radially adjacent to the inner circumferential surface 24 of the annular partition 2. This makes the structure of the impeller middle section 100 more reasonable.

[0063] Optionally, the maximum dimension H of the protrusion 1 in the axial direction of the annular partition 2 is greater than or equal to 1.4 mm and less than or equal to 2.2 mm. Correspondingly, the maximum depth of the groove 232 is greater than or equal to 1.4 mm and less than or equal to 2.2 mm. This not only further increases the feed flow at the adjacent gate 241 of the cavity 230, so as to further prevent the interior of the gate-corresponding portion 23 and its vicinity of the annular partition 2 from having pores, but also reduces the manufacturing difficulty of the protrusion 1 and prevents the protrusion 1 from breaking.

[0064] In other words, when the maximum dimension H of the protrusion 1 in the axial direction of the annular partition 2 (the maximum depth of the groove 232) is less than 1.4 mm, the turbulence effect of the groove 232 is not obvious, and its effect on increasing the feed flow at the adjacent gate 241 of the cavity 230 is not obvious; when the maximum dimension H of the protrusion 1 in the axial direction of the annular partition 2 (the maximum depth of the groove 232) is greater than 2.2 mm, it will increase the manufacturing difficulty of the protrusion 1 and make the protrusion 1 easy to break.

[0065] Alternatively, the maximum dimension H of the protrusion 1 in the axial direction of the annular partition 2 is greater than or equal to 1.7 mm and less than or equal to 1.9 mm, that is, the maximum depth of the groove 232 is greater than or equal to 1.7 mm and less than or equal to 1.9 mm. This not only further increases the feed flow at the adjacent gate 241 of the cavity 230, so as to further prevent the interior of the gate corresponding portion 23 and its vicinity of the annular partition 2 from having pores, but also further reduces the manufacturing difficulty of the protrusion 1 and further prevents the protrusion 1 from breaking.

[0066] Optionally, the maximum radial dimension of the protrusion 1 in the annular partition 2 is greater than or equal to 2.6 mm and less than or equal to 3.4 mm. Correspondingly, the maximum radial dimension of the groove 232 in the annular partition cavity 231 is greater than or equal to 2.6 mm and less than or equal to 3.4 mm. This further increases the feed flow at the adjacent gate 241 of the cavity 230 without interfering with the blade 3, thereby further preventing the interior of the gate-corresponding portion 23 and its vicinity of the annular partition 2 from having pores, thus making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0067] Alternatively, the maximum radial dimension of the protrusion 1 in the annular partition 2 is greater than or equal to 2.9 mm and less than or equal to 3.1 mm, that is, the maximum radial dimension of the groove 232 in the annular partition cavity 231 is greater than or equal to 2.9 mm and less than or equal to 3.1 mm. This further increases the feed flow at the adjacent gate 241 of the cavity 230 without interfering with the blade 3, thereby further preventing pores inside the gate-corresponding portion 23 and its vicinity of the annular partition 2, making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0068] Optionally, the length of the protrusion 1 is greater than or equal to 4 mm and less than or equal to 6 mm. Correspondingly, the length of the groove 232 is greater than or equal to 4 mm and less than or equal to 6 mm. This can further increase the feed flow at the adjacent gate 241 of the cavity 230, so as to further prevent the interior of the gate corresponding portion 23 of the annular partition 2 and its surrounding portion from having pores, thereby making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0069] Alternatively, the length of the protrusion 1 is greater than or equal to 4.5 mm and less than or equal to 5.5 mm, that is, the length of the groove 232 is greater than or equal to 4.5 mm and less than or equal to 5.5 mm. This can further increase the feed flow at the adjacent gate 241 of the cavity 230, so as to further prevent the interior of the gate corresponding portion 23 of the annular partition 2 and its surrounding portion from having pores, thereby making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0070] Optionally, the length direction of the protrusion 1 is consistent with the length direction of the corresponding portion 23 of the gate, and the difference between the length of the protrusion 1 and the length of the corresponding portion 23 of the gate is less than or equal to a preset value. Correspondingly, the length direction of the groove 232 is consistent with the length direction of the gate 241, and the difference between the length of the groove 232 and the length of the gate 241 is less than or equal to a preset value.

[0071] This allows the length of the groove 232 to better match the length of the gate 241, thereby further increasing the material flow at the adjacent gate 241 in the cavity 230 and further preventing pores inside the gate-corresponding portion 23 and its vicinity of the annular partition 2, thus making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage. The length direction of the protrusion 1 (gate-corresponding portion 23) is perpendicular to the axial direction of the annular partition 2, and the length direction of the groove 232 (gate 241) is perpendicular to the axial direction of the annular partition cavity 231.

[0072] Alternatively, the length of the protrusion 1 is equal to the length of the corresponding portion 23 of the gate, and the length of the groove 232 is equal to the length of the gate 241. This can further increase the feed flow of the cavity 230 near the gate 241, so as to further prevent the interior of the corresponding portion 23 of the gate of the annular partition 2 and its vicinity from having pores, thereby making the annular partition 2 and the impeller middle section 100 less prone to cracking and damage.

[0073] like Figures 2-5 As shown, the projection of the protrusion 1 onto the annular partition 2 in the axial direction is a streamlined shape extending circumferentially along the annular partition 2. Correspondingly, the projection of the groove 232 onto the annular partition cavity 231 in the axial direction is a streamlined shape extending circumferentially along the annular partition cavity 231. This effectively reduces the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0074] Optionally, the cross-sectional area of ​​the protrusion 1 gradually decreases in the axial direction away from the annular partition 2. Correspondingly, the cross-sectional area of ​​the groove 232 gradually decreases in the axial direction away from the annular partition cavity 231. This can further reduce the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0075] like Figures 2-7As shown, the surface of the protrusion 1 includes a curved surface, and the edge of the curved surface of the protrusion 1 includes a first arc segment 111, a first straight segment 131, a second arc segment 121, and a second straight segment 141 connected in sequence. The first arc segment 111 and the second arc segment 121 are spaced apart along the length direction of the protrusion 1. The first straight segment 131 is tangent to both the first arc segment 111 and the second arc segment 121, and the second straight segment 141 is tangent to both the first arc segment 111 and the second arc segment 121. This can further reduce the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0076] Accordingly, the wall surface of the groove 232 includes a curved surface, and the edge of the curved surface of the groove 232 includes a third circular arc segment, a third straight line segment, a fourth circular arc segment, and a fourth straight line segment connected in sequence. The third circular arc segment and the fourth circular arc segment are spaced apart along the length direction of the groove 232. The third straight line segment is tangent to both the third and fourth circular arc segments, and the fourth straight line segment is tangent to both the third and fourth circular arc segments.

[0077] Optionally, the protrusion 1 is provided on the first end face 21, and the edge of the curved surface of the protrusion 1 is adjacent to the first end face 21 in the axial direction of the annular partition 2. This allows the surface of the protrusion 1 to be mostly curved, thereby further reducing the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0078] Optionally, the protrusion 1 is provided on the first end face 21, and the edge of the curved surface of the protrusion 1 contacts the first end face 21. This allows the entire surface of the protrusion 1 to be curved, thereby further reducing the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0079] like Figures 2-7 As shown, the curved surface of the protrusion 1 includes a first part 11, a second part 12, a third part 13, and a fourth part 14. The first part 11 and the second part 12 are spaced apart along the length direction of the protrusion 1. The edge of the first part 11 includes a first arc segment 111, and the edge of the second part 12 includes a second arc segment 121. The edge of the third part 13 includes a first straight line segment 131, and the third part 13 is connected to both the first part 11 and the second part 12. The edge of the fourth part 14 includes a second straight line segment 141, and the fourth part 14 is connected to both the first part 11 and the second part 12.

[0080] In other words, the third part 13 is located between the first part 11 and the second part 12 along the length of the protrusion 1, and the fourth part 14 is located between the first part 11 and the second part 12 along the length of the protrusion 1. This can further reduce the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0081] Accordingly, the curved surface of the groove 232 includes a first wall surface, a second wall surface, a third wall surface, and a fourth wall surface. The first and second wall surfaces are spaced apart along the length of the groove 232. The edge of the first wall surface includes a third arc segment, and the edge of the second wall surface includes a fourth arc segment. The edge of the third wall surface includes a third straight line segment, and the third wall surface is connected to both the first and second wall surfaces. The edge of the fourth wall surface includes a fourth straight line segment, and the fourth wall surface is connected to both the first and second wall surfaces. That is, the third wall surface is located between the first and second wall surfaces along the length of the groove 232, and the fourth wall surface is located between the first and second wall surfaces along the length of the groove 232.

[0082] like Figure 3 and Figure 7 As shown, the first part 11 is a portion of a first sphere, and the second part 12 is a portion of a second sphere. Correspondingly, the first wall is a portion of the first sphere, and the second wall is a portion of the second sphere. This makes the surface of the protrusion 1 smoother, thereby further reducing the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000). For example, the first part 11 and the first wall can be a quarter of the first sphere, and the second part 12 and the second wall can be a quarter of the second sphere.

[0083] Optionally, the radius of the first spherical surface is greater than or equal to 2.6 mm and less than or equal to 3.4 mm. More preferably, the radius of the first spherical surface is greater than or equal to 2.9 mm and less than or equal to 3.1 mm. This can further reduce the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0084] Optionally, the radius of the second spherical surface is greater than or equal to 0.9 mm and less than or equal to 1.5 mm. More preferably, the radius of the second spherical surface is greater than or equal to 1.1 mm and less than or equal to 1.3 mm. This can further reduce the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0085] like Figure 3 As shown, both the third part 13 and the fourth part 14 are curved surfaces. Correspondingly, both the third and fourth wall surfaces are curved surfaces. This makes the surface of the protrusion 1 smoother, thereby further reducing the influence of the protrusion 1 on the flow field of the impeller middle section 100 (cross-flow impeller 1000).

[0086] This utility model also discloses a cross-flow impeller 1000. The cross-flow impeller 1000 according to an embodiment of this utility model includes multiple impeller sections 100, which are sequentially connected along the axial direction of the annular partition 2. Accordingly, the cross-flow impeller 1000 according to an embodiment of this utility model has advantages such as high structural strength, resistance to cracking, resistance to damage, and good dynamic balance performance.

[0087] This utility model also discloses an air conditioner. The air conditioner according to an embodiment of this utility model includes a cross-flow fan 1000. Accordingly, the air conditioner according to this utility model has advantages such as high structural strength of the cross-flow fan 1000, resistance to cracking and damage, and good dynamic balance performance of the cross-flow fan 1000.

[0088] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0089] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0090] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0091] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0092] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0093] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A production mold for an impeller middle section, characterized in that, include: A fixed mold and a moving mold define a cavity between the fixed mold and the moving mold. One of the fixed mold and the moving mold has a runner that communicates with the cavity through a gate. The cavity includes an annular partition cavity, a groove, and multiple blade cavities. The blade cavities and the groove are both connected to the annular partition cavity. The multiple blade cavities are evenly spaced along the circumference of the annular partition cavity. In the radial direction of the annular partition cavity, the distance from the gate to the groove is less than the distance from the gate to the blade cavity.

2. The production mold for the impeller middle section according to claim 1, characterized in that, The blade cavity and the groove are located on the same side of the annular septum cavity in the axial direction.

3. The production mold for the impeller middle section according to claim 2, characterized in that, The flow channel includes a main flow channel and multiple branch flow channels, the multiple branch flow channels are connected to the main flow channel, the grooves are multiple and are evenly spaced along the circumference of the annular partition cavity, the gates are multiple and correspond to the grooves in the radial direction of the annular partition cavity, the multiple gates correspond to the multiple branch flow channels, and the branch flow channels are connected to the annular partition cavity through the corresponding gates.

4. The production mold for the impeller middle section according to claim 1, characterized in that, In the radial direction of the annular septum cavity, the groove is located inside the blade cavity.

5. The production mold for the impeller middle section according to any one of claims 1-4, characterized in that, The projection of the groove on the axial direction of the annular partition cavity is a streamlined shape that extends circumferentially along the annular partition cavity.

6. The production mold for the impeller middle section according to claim 5, characterized in that, The cross-sectional area of ​​the groove gradually decreases axially away from the annular diaphragm cavity.

7. An impeller middle section, characterized in that, The impeller intermediate section is manufactured using a production mold according to any one of claims 1-6, the impeller intermediate section comprising: An annular partition, wherein the annular partition is provided with a protrusion; and Multiple blades are disposed on the annular partition and arranged at intervals along the circumference of the annular partition.

8. The impeller middle section according to claim 7, characterized in that, The annular partition includes a first end face and a second end face that are axially opposite each other, and the protrusion and the blade are disposed on the same one of the first end face and the second end face.

9. The impeller middle section according to claim 7, characterized in that, The protrusions are multiple and evenly spaced along the circumference of the annular partition.

10. The impeller middle section according to claim 7, characterized in that, In the radial direction of the annular septum, the protrusion is located inside the blade.

11. The impeller middle section according to any one of claims 7-10, characterized in that, The projection of the protrusion on the axial direction of the annular partition is a streamlined shape extending circumferentially along the annular partition.

12. The impeller middle section according to claim 11, characterized in that, The cross-sectional area of ​​the protrusion gradually decreases along the axial direction away from the annular partition.

13. A cross-flow impeller, characterized in that, It includes multiple impeller sections, which are impeller sections according to any one of claims 7-12, and the multiple impeller sections are connected sequentially along the axial direction of the annular partition.

14. An air conditioner, characterized in that, Including the cross-flow wind turbine as described in claim 13.

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