Backward inclined centrifugal wind wheel

Abstract

The utility model discloses a retroverted centrifugal wind wheel which comprises an upper cover, a base plate and a plurality of blades, one end of each blade is fixedly installed on the upper cover, the other end of each blade is fixedly installed on the base plate, the blades are evenly distributed between the upper cover and the base plate, each blade comprises a regular part and a deformation part, and the regular parts and the deformation parts are arranged on the base plate. The normalizing part and the deformation part are both of an arc structure, the normalizing part and the deformation part are in smooth transition connection, the straight line where the connecting line of the arc center point of the normalizing part and the arc center point of the deformation part is located is a straight line L, and the straight line L intersects with the central axis of the base plate. According to the utility model, the air outlet efficiency is improved, and the efficiency of the wind wheel is improved; the assembling stability is improved, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the field of air conditioning and ventilation, in particular to a backward inclined centrifugal fan wheel. Background Art

[0002] Impellers are used to transport air, regulating the direction and intensity of airflow within a room or facility. Efficiently delivering air to a specific location remains a topic of ongoing research in this field. As air exits the high-speed rotating impeller, it reaches a relatively high velocity. As we all know, higher velocity increases dynamic pressure. Utilizing this dynamic pressure to ensure smooth air flow and minimize losses is key to effective impeller use.

[0003] Traditional wind turbine blades are typically perpendicular to the chassis, with the air outlet and air inlet oriented at 90°. This causes all air to flow vertically onto the walls of the system's internal space, resulting in pressure loss and reduced fan efficiency. Therefore, improvements to the wind turbine's structure are needed to improve its efficiency. Utility Model Content

[0004] In order to solve the problems existing in the prior art, the utility model provides a backward inclined centrifugal wind wheel, which improves the working efficiency of the wind wheel through a new design on the wind wheel structure.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the present invention is a backward-inclined centrifugal wind wheel, including an upper cover, a chassis and a plurality of blades, one end of the blade is fixedly mounted on the upper cover, and the other end of the blade is fixedly mounted on the chassis, and the plurality of blades are evenly distributed between the upper cover and the chassis, and the blade includes a regular portion and a deformed portion, and the regular portion and the deformed portion are both arc structures, and the regular portion and the deformed portion are smoothly transitioned to each other, and the straight line connecting the center point of the arc of the regular portion and the center point of the arc of the deformed portion is a straight line L, and the straight line L intersects with the central axis of the chassis.

[0006] In one embodiment of the present invention, the intersection point of the straight line L and the chassis is P, and the plane passing through point P and along the radial direction of the chassis is defined as the reference plane. The angle between the straight line L and the reference plane is α, and α is 65-85°.

[0007] In one embodiment of the present invention, the regular portion of the blade includes a first left edge, a first right edge and a first fixed edge, the head of the first fixed edge is connected to the first left edge, the tail of the first fixed edge is connected to the first right edge, and the first left edge is parallel to the first right edge.

[0008] In one embodiment of the present invention, the deformation portion of the blade includes a second left edge, a second right edge and a second fixed edge, the second fixed edge is located between the second left edge and the second right edge, the second left edge is smoothly transitioned to the first left edge, the second right edge is smoothly transitioned to the first right edge, and the second fixed edge corresponds to the first fixed edge.

[0009] In one embodiment of the present invention, both the regular portion and the deformed portion of the blade are provided with protrusions. Specifically, both the first fixed edge and the second fixed edge are provided with protrusions.

[0010] In one embodiment of the present invention, the upper cover and the bottom plate are respectively provided with process fixing holes for fixing the blades and cooperating with the protrusions on the blades.

[0011] In one embodiment of the present invention, a diffusion structure is provided between the bottom edge and the side of the chassis. The diffusion structure is a combination of an arc surface and a flat surface, which plays the role of air diffusion and reduces air flow loss.

[0012] In one embodiment of the present invention, the chassis is a cone-shaped structure.

[0013] In one embodiment of the present invention, the outer diameter of the bottom plate is smaller than the outer diameter of the upper cover.

[0014] In one embodiment of the present invention, the upper cover and the bottom plate are coaxially mounted.

[0015] The utility model achieves the purpose of oblique air discharge from the wind wheel by tilting the blades, thereby reducing the wind volume loss of the wind wheel and improving the efficiency of the wind wheel; reduces the wind volume loss of the wind wheel flow and improves the efficiency of the wind wheel through the special design of the blades; achieves the assembly problem of the blades at a specific angle through the pre-positioning of the blades, the upper cover and the chassis; and adds a diffusion arc to the lower plate to allow air to flow more efficiently, improve the efficiency of the wind wheel and reduce the noise of the wind wheel.

[0016] This technical solution has the following beneficial effects:

[0017] 1. Improve the wind output efficiency and the efficiency of the wind wheel;

[0018] 2. Improve the efficiency of the wind wheel;

[0019] 3. Improved assembly stability, ensuring quality while improving production efficiency;

[0020] 4. Reduced noise and improved system efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1This is a schematic structural diagram of an embodiment of the present utility model;

[0022] Figure 2 This is a front view of an embodiment of the utility model;

[0023] Figure 3 This is a structural diagram of the upper cover in one embodiment of the utility model;

[0024] Figure 4 This is a schematic structural diagram of a blade in one embodiment of the present utility model;

[0025] Figure 5 This is a structural diagram of a chassis in one embodiment of the present utility model;

[0026] Figure 6 This is a schematic structural diagram of a conventional wind wheel in use in one embodiment of the present invention;

[0027] Figure 7 This is a schematic structural diagram of a backward-inclined centrifugal impeller in one embodiment of the present invention when in use;

[0028] Figure 8 This utility model Figure 7 Schematic diagram of the structure of the center-backward inclined centrifugal wind wheel.

[0029] Explanation of the accompanying drawings: 1. Upper cover; 2. Blades; 3. Chassis; 4. Reference plane; 5. Straight line L; 6. First process fixing hole; 7. First left edge; 8. First right edge; 9. Protrusion; 10. Rotating diffusion device; 11. Second process fixing hole; 12. Inner wall of the first system; 13. Inner wall of the second system; 14. Side of chassis. DETAILED DESCRIPTION

[0030] Below with reference to the embodiment and the attached Figures 1 to 8 The utility model is further described.

[0031] A backward-inclined centrifugal impeller, such as Figure 1-3 As shown, it includes an upper cover 1, a base 3, and several blades 2. One end of each blade is fixedly mounted on the upper cover, and the other end is fixedly mounted on the base. The blades are evenly distributed between the upper cover and the base. In this embodiment, there are five blades 2. The upper cover 1 and the base 3 are respectively provided with a first process fixing hole 6 and a second process fixing hole 11 for installing and fixing the blades. Figure 1 This is a diagram of the overall assembly. The upper cover 1 and the base 3 are coaxially mounted, with blades 2 evenly distributed between the upper cover 1 and the lower plate 3 forming a wind wheel. The blades are tilted between the upper and lower plates, with an inclination angle of 65-85°. The outer diameter of the base 3 is smaller than that of the upper cover. The base 3 has a conical disc structure, and the lower portion of the base 3 has a curvature.

[0032] like Figure 4 As shown, the blade 2 includes a regular portion and a deformed portion. The regular portion is a relatively more regular portion of the blade. The boundary between the regular portion and the deformed portion is the dotted line in the figure. The regular portion and the deformed portion are both arc structures, and the regular portion and the deformed portion are smoothly connected. Figure 2 As shown, the line connecting the arc center points of the regular portion and the deformed portion is line L5, and line L intersects the central axis of the chassis. Line L intersects the chassis at point P, and a plane passing through point P and lying along the chassis radial direction is defined as reference plane 4. The angle α between line L and reference plane 4 is, in this embodiment, preferably 85°.

[0033] like Figure 4 As shown, the regular part of the blade includes a first left edge 7, a first right edge 8 and a first fixed edge, the head of the first fixed edge is connected to the first left edge, the tail of the first fixed edge is connected to the first right edge, and the first left edge 7 is parallel to the first right edge 8. The deformed part of the blade includes a second left edge, a second right edge and a second fixed edge, the second fixed edge is located between the second left edge and the second right edge, the second left edge is smoothly transitioned to the first left edge, the second right edge is smoothly transitioned to the first right edge, and the second fixed edge corresponds to the first fixed edge. In addition, both the regular part and the deformed part of the blade are provided with protrusions. Specifically, both the first fixed edge and the second fixed edge are provided with protrusions 9, which cooperate with the process fixing holes on the blade to act as positioning pins.

[0034] Further, if Figure 5 and 8 As shown, the chassis is equipped with a rotating diffuser 10. This diffuser 10 is a combination of an arc surface and a flat surface, and in cross-section, a combination of an arc and a line segment. Specifically, an arc is machined between the bottom edge of the chassis and the chassis side 14. One end of the arc connects to the chassis side 14, and the other end connects to the flat surface. This structural design diffuses air, reducing air flow losses and thereby improving the efficiency of the wind turbine.

[0035] Air flow direction within the entire system:

[0036] like Figure 6 As shown, after the traditional wind wheel rotates, air is sucked into the system from outside the system, and the air is thrown out horizontally along the blades of the wind wheel. When it hits the inner wall 12 of the first system, it will cause local vortexes and lead to air kinetic energy loss, reducing the efficiency of the wind wheel and causing local vortex noise.

[0037] like Figure 7 As shown, in this patent, after the impeller rotates, air is sucked into the system from outside the system, and the air is thrown out along the tilt direction of the impeller blades, and is not likely to hit the second system inner wall 13, and enters the system cavity along the curvature direction of the chassis 3, reducing the kinetic energy loss of the internal air and improving the efficiency of the fan.

[0038] Compared with the prior art, the present invention obtains a backward-inclined centrifugal impeller with a diffusion function through a special design of the blade profile and an improvement in the installation method between the blades and the upper cover and the bottom cover.

[0039] The above specific embodiments are only used to illustrate the present invention, not to limit the present invention. Any changes and substitutions made to the present invention without creative work within the scope of protection of the present invention and the claims shall fall within the scope of protection of the present invention patent.

Claims

1. A backward-inclined centrifugal impeller, comprising an upper cover, a base plate, and a plurality of blades, wherein one end of the blade is fixedly mounted on the upper cover, and the other end of the blade is fixedly mounted on the base plate, characterized in that: Several blades are evenly distributed between the upper cover and the chassis. The blades include a regular part and a deformed part. Both the regular part and the deformed part are arc structures, and the regular part and the deformed part are smoothly transitioned and connected. The straight line where the connecting line of the arc center point of the regular part and the arc center point of the deformed part is located is straight line L, and straight line L intersects with the central axis of the chassis.

2. The backward-inclined centrifugal impeller according to claim 1, characterized in that: The intersection point of the straight line L and the chassis is P, and the plane passing through point P and along the radial direction of the chassis is defined as the reference plane. The angle between the straight line L and the reference plane is α, and α is 65-85°.

3. The backward-inclined centrifugal impeller according to claim 1, characterized in that: The regular portion of the blade includes a first left edge, a first right edge and a first fixed edge, the head of the first fixed edge is connected to the first left edge, the tail of the first fixed edge is connected to the first right edge, and the first left edge is parallel to the first right edge.

4. The backward-inclined centrifugal impeller according to claim 3, characterized in that: The deformed portion of the blade includes a second left edge, a second right edge and a second fixed edge, the second fixed edge is located between the second left edge and the second right edge, the second left edge is smoothly transitioned to the first left edge, the second right edge is smoothly transitioned to the first right edge, and the second fixed edge corresponds to the first fixed edge.

5. The backward-inclined centrifugal impeller according to claim 1, characterized in that: Both the regular part and the deformed part of the blade are provided with protrusions.

6. The backward-inclined centrifugal impeller according to claim 5, characterized in that: The upper cover and the bottom plate are respectively provided with process fixing holes.

7. The backward-inclined centrifugal impeller according to claim 1, characterized in that: A diffusion structure is provided between the bottom edge and the side of the chassis.

8. The backward-inclined centrifugal impeller according to claim 1, characterized in that: The chassis are all in a cone-disc structure.

9. The backward-inclined centrifugal impeller according to any one of claims 1 to 8, characterized in that: The outer diameter of the bottom plate is smaller than the outer diameter of the upper cover.

10. The backward-inclined centrifugal impeller according to claim 9, characterized in that: The upper cover and the chassis are coaxially installed.

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