Flow guide mechanism and fan

Abstract

The utility model provides a diversion mechanism which comprises a first diversion layer, the first diversion layer comprises a plurality of first diversion blades, a first seat body and a first fixing ring, each first diversion blade comprises a first starting end and a first ending end, and the first seat body comprises a framework seat body and an embedded seat body. The framework seat body comprises a plurality of first umbrella ribs and first groove bodies formed between any two adjacent first umbrella ribs, the first starting ends and the first umbrella ribs are integrally formed, the first groove bodies are suitable for being in sliding fit with the core pulling block in the mold stripping process, and the framework seat body is embedded with a plurality of second umbrella ribs of the seat body and second groove bodies formed between any two adjacent second umbrella ribs. The first umbrella rib is matched with the second groove body, and the second umbrella rib is matched with the first groove body; the first fixing ring is coaxially arranged on the periphery of the first seat body, and the first terminating end extends to the inner wall of the first fixing ring. According to the utility model, the first groove body is matched with the core-pulling block, so that the mold can be smoothly demolded in the production process, and the problem of back-off is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and in particular relates to a flow guiding mechanism and a fan. Background Technology

[0002] Traditional fan guide mechanisms typically employ a relatively simple structure, with guide blades often featuring simple planar or fixed curvature designs. This results in problems such as low airflow guiding efficiency, significant pressure loss, and substantial turbulence. During mold forming, spiral guide blades are prone to creating undercut areas due to bending and cornering, especially at acute angles where the space is even narrower. This makes it more difficult for core-pulling or demolding mechanisms to reach and operate in these areas, increasing demolding difficulty, production complexity, and cost. Furthermore, compared to traditional straight-blade guide structures, spiral guides often fail to effectively guide airflow into a stable and efficient flow path, leading to turbulent airflow, higher energy loss, low wind speed, and high noise. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a flow guiding mechanism to meet the needs of users.

[0004] To achieve the above objectives, this utility model provides a flow guiding mechanism, including a first flow guiding layer, the first flow guiding layer including...

[0005] A plurality of first guide vanes, comprising a first starting end and a first ending end,

[0006] The first base includes a frame base and a fitting base. The frame base includes a plurality of first umbrella ribs and a first groove formed between any two adjacent first umbrella ribs. The first starting end is integrally formed with the first umbrella ribs. The first groove is adapted to slide with the core-pulling block during the demolding process. The fitting base includes a plurality of second umbrella ribs and a second groove formed between any two adjacent second umbrella ribs. The first umbrella ribs cooperate with the second grooves, and the second umbrella ribs cooperate with the first grooves.

[0007] The first fixing ring is coaxially disposed on the periphery of the first base, and the first terminating end extends to the inner wall of the first fixing ring.

[0008] Preferably, the first umbrella rib includes a first straight edge and a first inclined edge, and adjacent first straight edges and first inclined edges form the first groove, with the first inclined edge slidingly engaging with the core-pulling block.

[0009] Preferably, the second umbrella rib includes a second straight edge and a second oblique edge, the first straight edge is adapted to the second straight edge, the first oblique edge is adapted to the second oblique edge, and the first straight edge and the second straight edge slide together to guide the first umbrella rib and the second umbrella rib to be inserted.

[0010] Preferably, the first groove is a trapezoidal groove that extends through both ends, and the first straight side and the first inclined side are adapted to form its two sides, with the angle between the first straight side and the first inclined side being 15° to 30°.

[0011] Preferably, the first guide vane includes a first pressure vane and a first suction vane, wherein the first suction vane intersects with the first inclined side and forms a connecting angle, the degree of which is 100°-130°.

[0012] Preferably, the skeleton base and the fitting base are assembled to form a first flow-guiding frustum, the first flow-guiding frustum including a first converging end face and a first open end face, and the airflow flows from the first converging end face to the first open end face.

[0013] Preferably, the first straight edge is arranged along the generatrix direction of the frustum structure.

[0014] Preferably, the system further includes a second guide layer, through which airflow flows from the first guide layer to the second guide layer, the second guide layer comprising...

[0015] A plurality of second guide vanes, each including a second starting end and a second ending end, wherein the first guide vane and the second guide vane are offset from each other;

[0016] The second seat body is coaxially arranged with the first seat body, and the second starting end extends to the second seat body;

[0017] The second fixing ring, wherein the second termination end extends to the second fixing ring.

[0018] Preferably, the first open end face is disposed facing the second base body, the first open end face has a first open end diameter, the second base body is a cylindrical structure, the second base body has a second diameter, and the first open end diameter is the same length as the second diameter.

[0019] Preferably, the inner contour of the second fixing ring forms a frustum-shaped or trumpet-shaped second guiding passage, the second guiding passage including a second converging port and a second open port, the second open port being disposed toward the first fixing ring.

[0020] Preferably, the first guide vane is adapted to form a spiral vortex structure centered on the first base, and the second guide vane is adapted to form a spiral vortex structure centered on the second base. Compared to the traditional straight-blade guide structure, the spiral vane allows the airflow to pass through the guide mechanism more smoothly, reducing the degree of airflow turbulence and the resulting energy loss, lowering high-frequency noise caused by airflow turbulence, and helping to maintain a high airflow velocity. The number of second guide vanes is 1.5 times the number of first guide vanes. When high-speed airflow passes through the guide mechanism, more second guide vanes can more finely adjust and guide the airflow passing through the first guide layer, making the airflow velocity and pressure distribution more uniform. Uniform airflow distribution reduces airflow fluctuations and pressure abrupt changes, which are also important causes of noise.

[0021] A fan, including

[0022] The ventilation duct has a ventilation cavity, an air inlet and an air outlet located at both ends of the ventilation cavity along its axial direction.

[0023] A fan, installed in the air cavity, is adapted to drive airflow from the air inlet to the air outlet.

[0024] As described above, the first flow guiding layer is positioned towards the fan, and a portion of the air duct is adapted to form the first fixing ring. This integrated design reduces airflow leakage and energy loss between the flow guiding mechanism and the air duct.

[0025] Preferably, the first converging end face is oriented toward the fan, and the second converging port is adapted to form the air outlet.

[0026] Preferably, the second base and the first open end face enclose an electromechanical cavity suitable for housing a control circuit board and / or a battery. The control circuit board is suitable for controlling the start and stop of the fan, and the battery is suitable for powering the fan. This makes reasonable use of space and realizes the control and power supply functions of the fan, making the fan structure more compact.

[0027] Preferably, the frame base includes a central cylinder and a first umbrella rib integrally formed around the central cylinder, the central cylinder including a closed end face to restrict airflow, the central cylinder including an open end face for the fan to be installed to the closed end face, and the fitting base includes a fitting ring and a second umbrella rib integrally formed around the fitting ring.

[0028] The beneficial effects of this utility model are:

[0029] First, by setting the first groove and the core-pulling block to cooperate, the mold can be smoothly demolded during the production process, avoiding the problem of undercutting and improving production efficiency and product quality. In addition, the interlocking umbrella rib design improves the coaxiality of the assembly, forming a stable structure, which can suppress local turbulence caused by misalignment and reduce noise caused by the vibration of the base when the fan is running at high speed.

[0030] II. The design of the first guide frustum and the frustum-shaped or trumpet-shaped second guide path of the inner contour of the second fixed ring, on the one hand, gradually shrinks the space to accelerate the airflow, and on the other hand, helps to guide the airflow to flow smoothly, reduce airflow disturbance and vortex, thereby reducing the noise caused by airflow disturbance. Attached Figure Description

[0031] Figure 1 A schematic diagram of the first flow guiding layer provided by this utility model.

[0032] Figure 2 This is a structural schematic diagram of the first flow guiding layer provided by this utility model from another angle.

[0033] Figure 3 A schematic diagram of the structure of the first flow guiding layer (excluding the fitting base) provided by this utility model.

[0034] Figure 4 for Figure 3 An enlarged schematic diagram of region A in the middle.

[0035] Figure 5 This is a schematic diagram of the structure of the fitting base provided by this utility model.

[0036] Figure 6 This is a schematic diagram of the second flow guiding layer provided by this utility model.

[0037] Figure 7 This is a schematic diagram of the structure of a fan provided by this utility model.

[0038] Figure 8 This is a cross-sectional schematic diagram of a fan provided by this utility model.

[0039] In the diagram: 100, First guide layer; 110, First guide vane; 111, First starting end; 112, First ending end; 113, First pressure blade; 114, First suction blade; 121, skeletal base; 1211, Central cylinder; 1212, First umbrella rib; 1213, First groove; 1214, First straight edge; 1215, First inclined edge; 122, Fitting base; 1221, Fitting ring; 1222, Second umbrella rib; 1223, Second groove; 1224, Second straight edge; 1225, Second inclined edge ; 123, First guide frustum; 1231, First converging end face; 1232, First open end face; 130, First fixing ring; 200, Second guide layer; 210, Second guide blade; 211, Second starting end; 212, Second ending end; 220, Second base; 230, Second fixing ring; 231, Second converging port; 232, Second open port; 301, Air duct; 311, Air cavity; 312, Air inlet; 302, Fan; 303, Control circuit board; 304, Battery; 305, Electromechanical cavity. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0042] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0043] Example 1

[0044] like Figure 1-8The aforementioned flow guiding mechanism includes a first flow guiding layer 100. The first flow guiding layer 100 includes a plurality of first flow guiding blades 110, a first base and a first fixing ring 130. The first fixing ring 130 is coaxially disposed around the periphery of the first base. The first flow guiding blades 110 include a first starting end 111 extending to the first base and a first ending end 112 extending to the first fixing ring 130. The first base includes a frame base 121 and a fitting base 122. The frame base 121 includes a plurality of first umbrella ribs 1212 and a first groove 1213 formed between any two adjacent first umbrella ribs 1212. The first starting end 111 is integrally formed with the first umbrella ribs 1212. The first groove 1213 is adapted to slide with the core-pulling block during the demolding process. The fitting base 122 includes a plurality of second umbrella ribs 1222 and a second groove 1223 formed between any two adjacent second umbrella ribs 1222. The first umbrella ribs 1212 fit with the second groove 1223, and the second umbrella ribs 1222 fit with the first groove 1213.

[0045] In this embodiment, the first umbrella rib 1212 includes a first straight side 1214 and a first inclined side 1215. Adjacent first straight sides 1214 and first inclined sides 1215 form a first groove 1213. The first groove 1213 is a trapezoidal groove with both ends connected. The first straight side 1214 and the first inclined side 1215 are adapted to form its two sides, and the angle between the first straight side 1214 and the first inclined side 1215 is 20°. The first guide vane 110 includes a first pressure vane 113 and a first suction vane 114. The first suction vane 114 intersects with the first inclined side 1215 and forms a connecting angle of 120°. The first inclined side 1215 is in sliding engagement with the core-pulling block. The second umbrella rib 1222 includes a second straight edge 1224 and a second oblique edge 1225. The first straight edge 1214 is adapted to the second straight edge 1224, and the first oblique edge 1215 is adapted to the second oblique edge 1225. The first straight edge 1214 and the second straight edge 1224 are slidably engaged to guide the first umbrella rib 1212 and the second umbrella rib 1222 to be inserted.

[0046] In this embodiment, the skeleton base 121 and the fitting base 122 are assembled to form a first flow-guiding frustum 123. The first flow-guiding frustum 123 includes a first converging end face 1231 and a first open end face 1232, and the airflow flows from the first converging end face 1231 to the first open end face 1232. The first straight side 1214 is arranged along the generatrix direction of the frustum structure.

[0047] In this embodiment, the frame base 121 includes a central cylinder 1211 and a first umbrella rib 1212 integrally formed around the central cylinder 1211. The central cylinder 1211 includes a closed end face to restrict airflow and an open end face for the fan 302 to be installed on the closed end face. The fitting base 122 includes a fitting ring 1221 and a second umbrella rib 1222 integrally formed around the fitting ring 1221.

[0048] The mold core-pulling structure required for producing the first guide layer 100 includes a mold body, a core-pulling block, and a drive mechanism. The mold body has a cavity for forming the skeleton base 121, the integrally formed first guide vane 110, and the air duct 301. The core-pulling block is disposed in the cavity, corresponding to the first groove 1213, and the shape and size of the core-pulling block match the first groove 1213. The drive mechanism is connected to the core-pulling block and is used to drive the core-pulling block to move within the cavity to achieve core-pulling and demolding. In actual production, the mold body is first closed, and then the raw material is injected into the cavity to form the skeleton base 121 and related components. After the product is formed, the drive mechanism drives the core-pulling block to move along the inclined groove direction of the first groove 1213 to pull the core-pulling block out of the first groove 1213, and then the mold is opened and the product is removed.

[0049] Specifically, the drive mechanism includes a hydraulic cylinder, which hydraulically drives the core-pulling block to move along the inclined groove direction of the first groove 1213 to achieve the core-pulling action. The mold body is also equipped with a guide device, which is a linear guide rail, to guide the movement of the core-pulling block, ensuring that the core-pulling block will not deviate or shake during the movement, thereby improving the accuracy and stability of core pulling.

[0050] In this embodiment, the flow guiding mechanism further includes a second flow guiding layer 200. Airflow flows from the first flow guiding layer 100 to the second flow guiding layer 200. The second flow guiding layer 200 includes a plurality of second flow guiding blades 210, a second base 220, and a second fixing ring 230. The second base 220 is coaxially disposed on the front side of the first base, and the second fixing ring 230 is coaxially disposed on the outer side of the second base 220. The second flow guiding blades 210 include a second starting end 211 extending to the second base 220 and a second ending end 212 extending to the second fixing ring 230. The first flow guiding blades 110 and the second flow guiding blades 210 are offset from each other.

[0051] In this embodiment, the first open end face 1232 is disposed facing the second base 220, and the first open end face 1232 has a first open end diameter. The second base 220 is a cylindrical structure and has a second diameter, the first open end diameter being the same length as the second diameter. The inner contour of the second fixing ring 230 forms a frustum-shaped second guiding path, the second guiding path including a second converging port 231 and a second open port 232, the second open port 232 being disposed facing the first fixing ring 130. The first guide vane 110 is adapted to form a spiral vortex structure centered on the first base, and the second guide vane 210 is adapted to form a spiral vortex structure centered on the second base 220. Compared with the traditional straight blade guide structure, the spiral blades can make the airflow pass through the guide mechanism more smoothly, reducing the degree of airflow turbulence and the resulting energy loss, reducing high-frequency noise caused by airflow turbulence, and helping to maintain a high airflow velocity. The number of second guide vanes 210 is 1.5 times the number of first guide vanes 110. When high-speed airflow passes through the guide mechanism, more second guide vanes 210 can more finely adjust and guide the airflow passing through the first guide layer 100, making the speed and pressure distribution of the airflow more uniform. The uniform airflow distribution reduces airflow fluctuations and pressure abrupt changes, which are also important causes of noise.

[0052] Example 2

[0053] like Figure 7-8 The fan includes a duct 301, a fan 302, and the airflow guiding mechanism described in Embodiment 1. The duct 301 forms an air cavity 311, an air inlet 312 located at both axial ends of the air cavity 311, and an air outlet. The fan 302 is mounted in the air cavity 311 and is adapted to drive airflow from the air inlet 312 to the air outlet. A first airflow guiding layer 100 is disposed facing the fan 302, and a portion of the duct 301 is adapted to form a first fixing ring 130. This integrated design reduces airflow leakage and energy loss between the airflow guiding mechanism and the duct 301. A first converging end face 1231 is disposed facing the fan 302, and a second converging port 231 is adapted to form an air outlet.

[0054] In this embodiment, the second base 220 and the first open end face 1232 enclose an electromechanical cavity 305 suitable for accommodating the control circuit board 303 and / or the battery 304. The control circuit board 303 is suitable for controlling the start and stop of the fan 302, and the battery 304 is suitable for supplying power to the fan 302. This not only makes reasonable use of space, but also realizes the control and power supply functions of the fan 302, making the fan structure more compact.

[0055] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A flow directing mechanism, characterized by, Includes a first flow guide layer, the first flow guide layer includes A plurality of first guide vanes, comprising a first starting end and a first ending end, The first base includes a frame base and a fitting base. The frame base includes a plurality of first umbrella ribs and a first groove formed between any two adjacent first umbrella ribs. The first starting end is integrally formed with the first umbrella ribs. The first groove is adapted to slide with the core-pulling block during the demolding process. The fitting base includes a plurality of second umbrella ribs and a second groove formed between any two adjacent second umbrella ribs. The first umbrella ribs cooperate with the second grooves, and the second umbrella ribs cooperate with the first grooves. The first fixing ring is coaxially disposed on the periphery of the first base, and the first terminating end extends to the inner wall of the first fixing ring.

2. The flow guiding mechanism according to claim 1, characterized in that, The first umbrella rib includes a first straight side and a first inclined side. Adjacent first straight sides and first inclined sides form the first groove. The first inclined side slides in conjunction with the core-pulling block. The second umbrella rib includes a second straight edge and a second oblique edge. The first straight edge is adapted to the second straight edge, and the first oblique edge is adapted to the second oblique edge. The first straight edge and the second straight edge slide together to guide the first umbrella rib and the second umbrella rib to be inserted.

3. A flow directing mechanism according to claim 2, wherein, The first groove is a trapezoidal groove that runs through both ends. The first straight side and the first inclined side are adapted to form its two sides. The angle between the first straight side and the first inclined side is 15° to 30°.

4. A flow directing mechanism according to claim 3, wherein The first guide vane includes a first pressure vane and a first suction vane. The first suction vane intersects with the first inclined side and forms a connecting angle, the degree of which is 100°-130°.

5. A flow guiding mechanism according to claim 1, characterized in that, The skeleton base and the fitting base are assembled to form a first flow-guiding frustum. The first flow-guiding frustum includes a first converging end face and a first open end face, and the airflow flows from the first converging end face to the first open end face.

6. A flow directing mechanism according to claim 5, wherein It also includes a second guide layer, through which airflow flows from the first guide layer to the second guide layer, the second guide layer including... A plurality of second guide vanes, each including a second starting end and a second ending end, wherein the first guide vane and the second guide vane are offset from each other; The second seat body is coaxially arranged with the first seat body, and the second starting end extends to the second seat body; The second fixing ring, wherein the second termination end extends to the second fixing ring.

7. A flow guiding mechanism according to claim 6, characterized in that, The first open end face is disposed facing the second base body, the first open end face has a first open end diameter, the second base body is a cylindrical structure, the second base body has a second diameter, and the first open end diameter is the same length as the second diameter; And / or, the inner contour of the second fixing ring forms a frustum-shaped or trumpet-shaped second guiding passage, the second guiding passage including a second converging port and a second open port, the second open port being disposed toward the first fixing ring.

8. A flow directing mechanism according to claim 7, wherein, The first guide vane is adapted to form a spiral vortex structure centered on the first base body, and the second guide vane is adapted to form a spiral vortex structure centered on the second base body. The number of the second guide vane is 1.5 times the number of the first guide vane.

9. A fan, characterized by include The ventilation duct has a ventilation cavity, an air inlet and an air outlet located at both ends of the ventilation cavity along its axial direction. A fan, installed in the air cavity, is adapted to drive airflow from the air inlet to the air outlet. The flow guiding mechanism as described in any one of claims 6-8, wherein the first flow guiding layer is disposed toward the fan, and a portion of the air duct is adapted to form the first fixing ring.

10. A fan as claimed in claim 9, wherein The second housing and the first open end face enclose an electromechanical cavity suitable for housing a control circuit board and / or a battery. The control circuit board is suitable for controlling the start and stop of the fan, and the battery is suitable for supplying power to the fan.

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