Impeller structure and distributor

Abstract

The application relates to a liquid distributor, which comprises an impeller structure, the impeller structure comprising a hub and a blade set, the blade set being one-stage or multi-stage, each stage of the blade set comprising a plurality of blades distributed along the circumference of the hub, the cross section of the blade being arc-shaped as a whole, the convex direction of the arc shape being defined as the bending direction of the blade, and the bending directions of the plurality of blades of each stage of the blade set being the same. The liquid distributor is usually installed at the inlet of a heat exchanger and is used for uniformly distributing a gas-liquid two-phase fluid medium to each pipeline of the heat exchanger. The impeller structure and the liquid distributor provided by the application solve the problem that the mixing effect of the fluid medium is poor in the prior art, and the fluid medium in the liquid distributor is more uniformly mixed.

Description

Technical Field

[0001] This application relates to the field of refrigeration technology, and in particular to an impeller structure and a liquid distributor. Background Technology

[0002] An impeller structure is installed in a distributor to mix the fluid medium within it. The distributor also includes an inlet channel, multiple distribution channels, and a distribution chamber connecting the inlet and distribution channels. The fluid medium is distributed from the inlet channel through the impeller structure in the distribution chamber to the multiple distribution channels. In refrigeration technology, distributors are typically installed at the inlet of heat exchangers to evenly distribute the gas-liquid two-phase fluid medium to the various pipes of the heat exchanger. The refrigerant, after being compressed by the compressor, enters the heat exchanger through a condenser throttling process for heat exchange. Currently, most heat exchangers employ a multi-pipe design; therefore, evenly distributing the refrigerant to each pipe is crucial for improving heat exchange efficiency. However, existing distributors have impeller structures that result in poor refrigerant mixing. Summary of the Invention

[0003] Therefore, it is necessary to provide an impeller structure and a distributor to solve the problem of poor mixing effect of existing impeller structures on fluid media.

[0004] The impeller structure provided in this application includes a hub and a blade assembly. The blade assembly is of one or more stages. Each stage of the blade assembly includes multiple blades distributed circumferentially along the hub. The cross-section of the blades is generally arc-shaped. The convex direction of the arc is defined as the bending direction of the blade. Multiple blades in the same stage of the blade assembly have the same bending direction.

[0005] In one embodiment, the bending direction of multiple blades in each stage blade group is arranged clockwise or counterclockwise around the central axis of the hub, and each stage blade group includes 4-12 blades. It is understood that this arrangement facilitates blade installation, and the multiple blades ensure sufficient contact between the gas-liquid two-phase fluid medium and the blades, thereby resulting in more uniform mixing of the fluid medium. Simultaneously, it makes full use of the space on the hub sidewall.

[0006] In one embodiment, the blade assembly is multi-stage, with multiple stages of blades spaced apart along the axial direction of the hub. This arrangement facilitates thorough and uniform mixing of the fluid medium at different depths within the distributor. The blades of adjacent stages have opposite curvature directions. This arrangement allows the fluid medium to form turbulent vortices upon impacting the surface of the next stage blade. These turbulent vortices have different directions than those formed on the surface of the previous stage blade, further enhancing the mixing effect of the fluid medium.

[0007] In one embodiment, the number of multiple stages is even, and the multiple stages of blade groups form one or more pairs of blade groups. Each pair of blade groups includes a first blade group and a second blade group. Along the axial direction of the hub, multiple blades of the first blade group are arranged in a one-to-one correspondence with multiple blades of the second blade group, and the center lines of the cross-sections of each pair of blades that are staggered form a pair of hyperbolas. It can be understood that with this arrangement, the center lines of the corresponding two blades use the same hyperbolic equation, which facilitates the manufacture of blade molds and reduces processing costs.

[0008] In one embodiment, the angle d between the projection of one asymptote of the hyperbola and the central axis of the hub onto the same plane is 45° ≤ d ≤ 90°, and the range of the hyperbola's eccentricity e is: Understandably, this setup facilitates uniform mixing of the fluid medium and makes processing easier.

[0009] In one embodiment, the contour lines b on both sides of the blade's cross-section correspond to the same line type as the center line a of the cross-section. This arrangement facilitates mold making of the blade, thereby reducing the processing difficulty. The end contour line c connecting the two sides of the cross-section is arc-shaped, and the two side contour lines are equidistant from the center line. The distance between the two side contour lines b is ≥2mm. This arrangement results in smoother blade edges, which is beneficial for further mixing of the fluid medium.

[0010] In one embodiment, the hub is provided with a mounting groove, and the blade is mounted on the hub through the mounting groove, with the blade fixedly connected to the hub.

[0011] In another embodiment, the blade and hub are integrally formed.

[0012] This application also provides a liquid separator, which includes a liquid separator body and an impeller structure as described in any of the above embodiments. The liquid separator body is provided with an inlet channel, multiple liquid separator channels and a liquid separator chamber that connects the inlet channel and the liquid separator channels. The impeller structure is located in the liquid separator chamber.

[0013] In one embodiment, the bottom wall of the liquid separation chamber is provided with a mating hole, and the hub is provided with a mating post corresponding to the mating hole. At least a portion of the mating post is located within the mating hole, and the mating post is fixedly connected to the liquid separation chamber. It is understood that with this arrangement, the fluid medium continuously impacts the blade surface, causing the blade to drive the impeller structure to rotate around the mating post, thereby further mixing the fluid medium.

[0014] In one embodiment, the axis of the hub coincides with the axis of the liquid separator, and the top of the hub is an arc surface. It is understood that this configuration allows the hub to act as a guide, ensuring that the fluid medium flows down the sidewall of the hub and fully contacts the blade surface. This promotes uniform mixing of the fluid medium.

[0015] Since multiple blades in each stage of the blade assembly are distributed circumferentially along the hub, in the distributor, when the fluid medium impacts the impeller structure, it continuously impacts the blade surface. Furthermore, the blade surface exerts a reverse force on the fluid medium, the direction of which is axially symmetrical to the direction of the force exerted by the fluid medium on the blade surface. Driven by this reverse force, the fluid medium moves in a direction axially symmetrical to its original direction of motion after impacting the blade surface. At this point, turbulent vortices are formed within the distributor, making the mixing of the gas and liquid phases more uniform. Moreover, because the cross-section of the blades is generally arc-shaped, this design facilitates the diffusion of the fluid medium in all directions after impacting the blade surface, thus promoting uniform mixing within the distributor. The convex direction of the arc is defined as the bending direction of the blade. For ease of blade installation, multiple blades in the same stage of the blade assembly have the same bending direction. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this application or the conventional technology, the drawings used in the description of the embodiments or the conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 A schematic diagram of the impeller structure provided in this application;

[0018] Figure 2 This is a schematic diagram of the impeller structure according to another embodiment of the present application;

[0019] Figure 3 for Figure 2 A top view of the impeller structure in the image;

[0020] Figure 4 A top view of the impeller structure according to another embodiment provided in this application;

[0021] Figure 5 A cross-sectional view of a dispenser according to an embodiment provided in this application;

[0022] Figure 6 A cross-sectional view of a dispenser according to another embodiment provided in this application;

[0023] Figure 7 A top view of an impeller structure according to an embodiment provided in this application;

[0024] Figure 8 for Figure 1A top view of the impeller structure in the image;

[0025] Figure 9 A cross-sectional view of a blade according to an embodiment provided in this application;

[0026] Figure 10 A cross-sectional view of a wheel hub according to an embodiment provided in this application.

[0027] Reference numerals: 100, liquid separator body; 110, impeller structure; 111, hub; 111a, mating column; 112, blade; 113, mounting groove; 120, liquid inlet channel; 130, liquid separator chamber; 140, liquid separator channel; 150, mating hole; 160, blade assembly; 170, first-stage blade assembly; 180, second-stage blade assembly. Detailed Implementation

[0028] To make the above-mentioned objectives, features, and advantages of this application more apparent and understandable, the specific embodiments of this application are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application. However, this application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this application. Therefore, this application is not limited to the specific embodiments disclosed below.

[0029] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or there may be an intermediate component. When a component is considered to be "connected to" another component, it can be directly connected to the other component or there may be an intermediate component present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used in this application's specification are for illustrative purposes only and do not represent the only possible implementation.

[0030] 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0031] In this application, unless otherwise expressly 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 and the second feature are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates 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 indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used in this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0033] In the field of refrigeration technology, a distributor is typically installed at the inlet of a heat exchanger to evenly distribute the gas-liquid two-phase fluid medium to the various pipes of the heat exchanger. After being compressed by the compressor, the refrigerant passes through a condenser and enters the heat exchanger for heat exchange. Currently, most heat exchangers employ a multi-pipe design; therefore, evenly distributing the refrigerant to each pipe is crucial for improving heat exchange efficiency. An impeller structure is installed in the distributor to mix the fluid medium within it. The distributor also includes an inlet channel, multiple distribution channels, and a distribution chamber connecting the inlet and distribution channels. The fluid medium is distributed from the inlet channel through the impeller structure in the distribution chamber to the multiple distribution channels. However, existing distributors have impeller structures that result in poor refrigerant mixing.

[0034] To improve the mixing effect of the impeller structure on the fluid medium, that is, to make the mixing of the gas and liquid phases more uniform, this application provides a liquid separator, which includes an impeller structure 110. Specifically, the impeller structure 110 includes a hub 111 and a blade assembly 160. The blade assembly 160 can be a single stage or multiple stages distributed along the axial direction of the hub 111, wherein the number of multiple stages includes two stages. Each stage of the blade assembly 160 includes multiple blades 112 distributed circumferentially along the hub 111. The cross-section of the blades 112 is generally arc-shaped, and the convex direction of the arc is defined as the bending direction of the blades 112. The bending directions of the multiple blades 112 in the same stage of the blade assembly 160 are the same.

[0035] Since the multiple blades 112 of each stage blade assembly 160 are distributed circumferentially along the hub 111, in the distributor, when the fluid medium impacts the impeller structure 110, the fluid medium continuously impacts the surface of the blades 112. Furthermore, the surface of the blades 112 exerts a reverse force on the fluid medium. The direction of this reverse force is axially symmetrical to the direction of the force exerted by the fluid medium on the surface of the blades 112. Driven by this reverse force, the fluid medium moves in a direction axially symmetrical to its original direction of motion after impacting the surface of the blades 112. At this time, turbulent vortices are formed in the distributor, which makes the mixing of the gas and liquid phases of the fluid medium more uniform. Furthermore, because the cross-section of the blades 112 is generally arc-shaped, this design facilitates the diffusion of the fluid medium in all directions after impacting the surface of the blades 112, thereby promoting uniform mixing of the fluid medium in the distributor. The direction of the arc protrusion is defined as the bending direction of the blade 112. To facilitate the installation of the blade 112, the bending directions of multiple blades 112 in the same stage blade group 160 are the same.

[0036] It should be noted that "the bending direction of blade 112" refers to the direction along the arc-shaped central axis pointing towards the arc-shaped protrusion. Furthermore, it should be noted that since blades 112 are distributed circumferentially along the hub 111, in this embodiment, "the bending direction of multiple blades 112 in the same stage blade group 160 is the same" does not mean they are the same in an absolute sense, but rather that they are the same in orientation relative to the center line of the hub 111.

[0037] In one embodiment, such as Figure 1 As shown, the impeller structure 110 includes two-stage blade groups 160, which are distributed along the axial direction of the hub 111. Therefore, after the gas-liquid two-phase fluid medium is mixed by the upper-stage blades 112, it continues to be uniformly mixed by the lower-stage blades 112. Thus, the mixing effect of the two-stage blades 112 is further enhanced, resulting in more uniform mixing of the gas-liquid two-phase fluid medium passing through the impeller structure 110, thereby greatly improving the mixing effect of the impeller structure 110 on the fluid medium.

[0038] In another embodiment, such as Figure 2 As shown, the impeller structure 110 includes a single-stage blade group 160, i.e., a first-stage blade group 160. The single-stage blade group 160 includes a plurality of blades 112 distributed circumferentially along the hub 111.

[0039] In one embodiment, such as Figure 3 As shown, the bending direction of the plurality of blades 112 of the single-stage blade assembly 160 is arranged clockwise around the central axis of the hub 111. However, this is not the only embodiment; in another embodiment, such as... Figure 4As shown, the bending direction of the multiple blades 112 of the single-stage blade group 160 is arranged counterclockwise around the central axis of the hub 111.

[0040] To improve the mixing effect of the blades on the fluid medium, in one embodiment, such as Figure 1 As shown, the blades 112 of each stage blade group 160 are evenly distributed along the circumference of the hub 111.

[0041] Similarly, in order to ensure that the fluid medium at different depths within the distributor is thoroughly and uniformly mixed, in another embodiment, such as... Figure 1 and Figure 5 As shown, the two-stage blade sets 160 are evenly spaced along the axial direction of the hub 111. This helps to further enhance the mixing effect of the impeller structure 110 on the fluid medium. However, this is not the only limitation. As another embodiment, the multi-stage blade sets 160 with more than two stages can also be evenly spaced along the axial direction of the hub 111. In addition, the spacing of the multi-stage blade sets 160 (including the two-stage blade sets 160) along the axial direction of the hub 111 can also be non-uniform.

[0042] In one embodiment, the number of stages in the multi-stage blade group 160 is even, such as two stages, four stages, etc. Each pair of adjacent impeller stages along the axial direction of the hub 111 from top to bottom forms a blade group. Along the axial direction of the hub 111, the direction of the blade group 160 closer to the liquid inlet channel 120 is defined as upward, and the direction farther from the liquid inlet channel 120 is defined as downward. To ensure that adjacent stages of the blade group 160 in a pair of blade groups can fully contact the gas-liquid two-phase fluid medium, in one embodiment, the blades 112 of adjacent stages of the blade group 160 have different bending directions. With this configuration, after the gas-liquid two-phase fluid medium impacts the surface of the blade 112 of the previous stage, it continues to move and impacts the surface of the blade 112 of the next stage. Furthermore, because the blades 112 of adjacent stages of the blade group 160 have different bending directions, the fluid medium forms turbulent vortices after impacting the surface of the next stage blade 112. These turbulent vortices have different directions than those formed on the surface of the previous stage blade 112, thereby further enhancing the mixing effect of the fluid medium.

[0043] Preferably, in one embodiment, such as Figure 1 and Figure 5 As shown, the blades 112 located in adjacent blade groups 160 have opposite bending directions. Therefore, after the fluid medium impacts the surface of the next stage blade 112, it forms turbulent vortices. These turbulent vortices have opposite directions to those formed on the surface of the previous stage blade 112, thereby further enhancing the mixing effect of the fluid medium.

[0044] In one embodiment, such as Figure 1 and Figure 5As shown, in the multi-stage blade assembly, along the axial direction from top to bottom along the hub 111, the blades 112 of the odd-numbered stages (e.g., the first stage, the third stage, etc.) of the blade assembly 160 have the same bending direction, and the blades 112 of all the even-numbered stages (e.g., the second stage, the fourth stage, etc.) of the blade assembly 160 have the same bending direction. It can be understood that the first-stage and second-stage blade assemblies form one pair of blade assemblies, and the third-stage and fourth-stage blade assemblies form another pair. This arrangement reduces the assembly difficulty of the blades 112 and the hub 111, thus facilitating the manufacturing of the impeller structure 110. Furthermore, the bending direction of the blades 112 of all the odd-numbered stages of the blade assembly 160 is different from that of all the even-numbered stages; specifically, the bending directions can be opposite.

[0045] In one embodiment, such as Figure 9 As shown, the centerline 'a' of the blade cross-section corresponds to the line shape of one branch of a hyperbola. Since the hyperbola's line shape is relatively simple and has a specific equation, this design facilitates mold making for the blade 112, thereby reducing the processing difficulty of the blade 112. Furthermore, it improves the mixing effect of the blade on the fluid medium. However, this is not a limitation; the line shape of the centerline 'a' of the blade cross-section can also be other curves. In other embodiments, the line shape of the centerline 'a' of the blade cross-section can correspond to a portion of a parabola, or it can correspond to a portion of an ellipse.

[0046] It should be noted that the hyperbola has two branches, and the center line 'a' of the blade cross section corresponds to the same line shape as one of the curves in the hyperbola.

[0047] Furthermore, it should be noted that the centerline 'a' of the blade cross-section refers to the characteristic line formed by connecting the centerline points of the cross-section width sequentially from one end of the cross-section to the other.

[0048] Furthermore, the centerline 'a' of the blade cross-section corresponds to the same line shape of the hyperbola near the origin.

[0049] Furthermore, to facilitate the molding of blade 112 and improve the mixing effect, in one embodiment, such as Figure 1 As shown, in a pair of blade groups, along the axial direction of the hub 111, multiple blades 112 of adjacent blade groups 160 are respectively arranged in a one-to-one correspondence, and the center line 'a' of the cross-section of each pair of blades arranged in a staggered manner corresponds to the same line shape as the two branches of a hyperbola. In this way, the center lines of the cross-sections of two staggered blades 112 use the same hyperbolic equation, which facilitates the fabrication of the blade 112 mold, reduces processing costs, and also helps to improve the mixing effect of the blade on the fluid medium.

[0050] In one embodiment, such as Figure 1 As shown, the impeller structure 110 includes two-stage blade groups 160, i.e., a pair of blade groups. Each pair of blade groups is defined as including a first-stage blade group 170 and a second-stage blade group 180. In the first-stage blade group 170 and the second-stage blade group 180, the center lines a of the cross-sections of two staggered blades form a hyperbola, and the angle d between the projection of one asymptote of the hyperbola and the central axis of the hub 111 onto the same plane is defined as d. The value range of d is 45°≤d≤90°. The same plane at this point is defined as a plane including the central axis or a plane parallel to the plane including the central axis. In different embodiments, d can be set to 45°, 60°, or 90°. When d is set to 90°, as... Figure 1 As shown.

[0051] In the aforementioned two-stage blade assembly 160, the centerlines a of the cross-sections of the two staggered blades form a hyperbola. The eccentricity e of this hyperbola ranges from 1 to √3. It is common knowledge that the eccentricity e of a hyperbola is greater than 1, and the larger the eccentricity e, the larger the opening of the hyperbola. An excessively large opening will reduce the mixing effect of the blade 112 on the fluid medium. Therefore, the eccentricity of the hyperbola is set to e ≤ √3.

[0052] The cross-section of blade 112 includes two parallel profile lines, as in one embodiment, such as Figure 9 As shown, the contour lines b on both sides of the blade cross-section correspond to the same line type as the center line a of the cross-section. The contour lines b on both sides are equidistant from the center line a, and the distance between the two contour lines b is ≥2mm, that is, the cross-sectional width of the blade 112 or the thickness of the blade 112 is ≥2mm. To make the two contour lines of the blade 112 cross-section smoothly connected, in one embodiment, as shown... Figure 9 As shown, the end profile c between the two side profile lines b of the blade cross section is arc-shaped. In this way, the edge of the blade 112 is smoother, and when the fluid medium impacts the end of the blade 112, the arc-shaped surface of the end causes the fluid medium to diffuse in all directions, which is beneficial to further mixing of the fluid medium.

[0053] To facilitate the installation of the blades 112, the multiple blades 112 of the same stage blade group 160 are bent in the same direction, and, in one embodiment, as... Figure 7 As shown, the bending direction of multiple blades 112 in the same stage blade group 160 is arranged clockwise around the central axis of the hub 111. However, it is not limited to this; in another embodiment, such as... Figure 8 As shown, the bending direction of multiple blades 112 in the same stage blade group 160 can also be set in a counterclockwise direction around the central axis of the hub 111.

[0054] Each stage of the blade assembly 160 includes 4-12 blades 112. In one embodiment, each stage of the blade assembly 160 may include 4 blades 112. However, it is not limited to this; in another embodiment, each stage of the blade assembly 160 may include 6 blades 112. Thus, the arrangement of multiple blades 112 allows the gas-liquid two-phase fluid medium to fully contact the blades 112, resulting in more uniform mixing of the fluid medium. Simultaneously, it fully utilizes the space on the sidewall of the hub 111.

[0055] In one embodiment, such as Figure 10 As shown, the hub 111 and blade 112 are respectively formed, and the hub 111 is provided with a mounting groove 113, through which the blade 112 is mounted on the hub 111. Further, the blade 112 and the hub 111 can be welded, snap-fitted, or bonded. Specifically, the blade 112 is first mounted on the hub 111 through the mounting groove 113, and then the blade 112 and the hub 111 are tightly fitted, welded, or bonded together. In another embodiment, the blade 112 and the hub 111 are an integrally formed structure. Further, the impeller structure 110 can be cast or stamped.

[0056] This application also provides a liquid dispenser, such as... Figure 5-6 As shown, the liquid dispenser includes a liquid dispensing body 100 and an impeller structure 110 as described in the above embodiments. The liquid dispensing body 100 is provided with an inlet channel 120, a plurality of dispensing channels 140, and a dispensing chamber 130 connecting the inlet channel 120 and the dispensing channels 140. The impeller structure 110 is disposed in the dispensing chamber 130. The fluid medium is distributed from the inlet channel 120 to the plurality of dispensing channels 140 through the impeller structure 110 in the dispensing chamber 130.

[0057] To connect the impeller structure 110 to the distributor, in one embodiment, as follows: Figure 5-6 As shown, the bottom wall of the liquid separation chamber 130 is provided with a mating hole 150, and the hub 111 is provided with a mating post 111a corresponding to the mating hole 150. At least part of the mating post 111a is located inside the mating hole 150, and the mating post 111a is fixedly connected to the liquid separation body 100. Specifically, the fixed connection can be achieved by interference fit, welding, or bonding. The fluid medium continuously impacts the surface of the blade 112, causing the fluid medium to form turbulent vortices under the action of the blades. The turbulent vortices make the mixing of the gas and liquid phases of the fluid medium more uniform, thereby further mixing the fluid medium. Of course, as another embodiment, the mating post can also be rotatably disposed inside the mating hole 150, that is, the impeller structure 110 can also rotate relative to the liquid separation body 100.

[0058] To ensure that the fluid medium flows in from the inlet channel 120 and impacts the surface of the blade 112 uniformly, in one embodiment, such as... Figure 5-6As shown, the central axis of the hub 111 coincides with the central axis of the liquid distribution body 100. With this configuration, the top of the hub 111 acts as a guide, allowing the fluid medium to flow down the side wall of the hub 111 and fully contact the surface of the blade 112. Furthermore, to improve the guiding effect of the top of the hub 111, the top of the hub can be set as an arc surface, which is conducive to the uniform mixing of the fluid medium. The end of the hub 111 closest to the liquid inlet channel 120 along the axial direction of the hub 111 is defined as the top.

[0059] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. Therefore, the patent protection scope of this application should be determined by the appended claims.

Claims

1. A structure of an impeller, characterized by, It includes a hub (111) and a blade group (160). The blade group (160) is of one level or multiple levels. Each level of the blade group (160) includes multiple blades (112) distributed circumferentially along the hub (111). The cross-section of the blade (112) is arc-shaped. The convex direction of the arc is defined as the bending direction of the blade (112). Multiple blades (112) of the same level of blade group (160) have the same bending direction. The number of the multiple levels is even, and the multiple levels of the blade group (160) form a pair of blade groups (160) or multiple pairs of blade groups (160). Each pair of blade groups (160) includes a first-stage blade group (170) and a second-stage blade group (180). Along the axial direction of the hub (111), a plurality of blades (112) of the first-stage blade group (170) and a plurality of blades (112) of the second-stage blade group (180) are arranged in a one-to-one correspondence, and the center line (a) of the cross section of each pair of blades arranged in a staggered manner forms a hyperbola. An included angle between one asymptote of the hyperbola and a central axis of the hub (111) projected in the same plane is d, and d is in a range of 45°≤d≤90°, and an eccentricity e of the hyperbola is in a range of: ; The two side contour lines (b) of the cross section of the blade (112) correspond to the same line type as the center line (a) of the cross section. The end contour line (c) connecting the two side contour lines of the cross section is arc-shaped. The two side contour lines are equidistant from the center line. The distance between the two side contour lines (b) is ≥2mm.

2. The impeller structure of claim 1, wherein The bending direction of the plurality of blades (112) in each stage of the blade group (160) is arranged in a clockwise or counterclockwise direction around the central axis of the hub (111), and the number of the plurality of blades in each stage of the blade group (160) is 4-12.

3. The impeller structure according to claim 1 or 2, characterized in that, The blade group (160) is multi-stage, and the multi-stage blade group (160) is distributed at intervals along the axial direction of the hub (111); The blades (112) of two adjacent blade groups (160) bend in opposite directions.

4. The impeller structure according to claim 1 or 2, characterized in that, The hub (111) is provided with a mounting groove (113), and the blade (112) is mounted on the hub (111) through the mounting groove (113), and the blade (112) is fixedly connected to the hub (111); Alternatively, the blade (112) and the hub (111) are integrally formed structures.

5. A liquid dispenser, characterized in that, The liquid distribution body (100) includes an inlet channel (120), a plurality of liquid distribution channels (140), and a liquid distribution chamber (130) connecting the inlet channel (120) and the liquid distribution channels (140). The impeller structure (110) is located in the liquid distribution chamber (130).

6. The dispenser according to claim 5, characterized in that, The bottom wall of the liquid separation chamber (130) is provided with a mating hole (150), and the hub (111) is provided with a mating post (111a) corresponding to the mating hole (150). At least part of the mating post (111a) is located in the mating hole (150), and the mating post (111a) is fixedly connected to the liquid separation body (100).

7. The dispenser according to claim 6, characterized in that, The central axis of the hub (111) coincides with the central axis of the liquid dispensing body (100), and the top of the hub (111) is an arc surface.

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