Air channel structure of air circulation fan and air circulation fan

Abstract

The utility model belongs to the technical field of circulating fans, and particularly relates to an air duct structure of an air circulating fan and the air circulating fan. The air circulation fan comprises an air duct structure, and the air duct structure comprises an air suction barrel shell, an air blowing barrel shell, fan blades and a driving motor. The second end of the air suction barrel shell is connected with the third end of the air blowing barrel shell; a plurality of turbulent flow rib plates are arranged in the second end of the air suction barrel shell, a plurality of flow guide rib plates are arranged in the third end of the air blowing barrel shell, and the flow guide rib plates and the turbulent flow rib plates are arranged in a crossed mode. The fan blades are arranged in the air suction barrel shell and are connected with the driving motor; and the driving motor drives the fan blades to rotate, so that air flow is sucked from the first end of the air suction barrel shell, extruded by the fan blades, and blown out from the fourth end of the air blowing barrel shell after passing through the turbulent flow rib plates and the flow guide rib plates. The air flow sucked by the fan blades passes through the turbulent flow rib plates, the turbulent flow effect on the compressed air flow is achieved, and the problems that due to the fact that the air pressure is unbalanced or the compressed air flow interacts with one another due to the inconsistent flowing directions, the air flow speed is reduced, and the air flow noise is large are solved.

Description

Technical Field

[0001] This utility model belongs to the field of air circulation technology, and in particular relates to an air circulation fan duct structure and an air circulation fan. Background Technology

[0002] Air circulators are primarily used for indoor air circulation to ensure a more even distribution of indoor air temperature. They can also be used as regular fans.

[0003] An air circulator fan mainly consists of a drive motor, a turbine fan, a baffle grille, and a cylindrical outer casing. Unlike ordinary fans, air circulator fans can direct airflow in a spiral pattern, creating a spiral column of air as the blades circulate. The airflow from an air circulator fan travels a longer distance and has good directionality.

[0004] For example, Chinese invention patent application CN119146080A discloses a circulating fan with a fork arm support structure, including a fan body and a base. A fork arm is provided on the base, and the fan body is hinged to the fork arm. The fan body is located inside the fork arm. The fan body has a motor housing and a fan blade motor. The fan blade motor is located in the front part of the motor housing. The fan body has a vertical swing drive mechanism, which includes a first motor, a first crank, a first connecting rod, a swing arm, and a force transmission arm. One end of the first crank is mounted on the output shaft of the first motor. The corresponding other end of the first crank is hinged to one end of the first connecting rod. The corresponding other end of the first connecting rod is hinged to one end of the swing arm. The corresponding other end of the swing arm is positioned and connected to one end of the force transmission arm. The corresponding other end of the force transmission arm is positioned and connected to the fork arm. The swing arm can swing relative to the first connecting rod around the hinge axis between the fan body and the fork arm. The first motor is installed in the rear part of the motor housing, and the first crank, the first connecting rod, and the swing arm are located inside the motor housing.

[0005] For example, Chinese utility model patent document CN208794609U discloses an ion-purifying air circulation fan, which includes a body, a fan assembly, a grille assembly, a non-equilibrium ion alternation generator and a driver. The body includes a housing, brackets fixed to both sides of the housing and a fixed grille located inside the housing. The fan assembly is disposed on the fixed grille. The grille assembly includes a first grille connected to the air inlet of the housing and a second grille connected to the air outlet of the housing. The second grille is vortex-shaped. The non-equilibrium ion alternation generator is disposed at the air outlet of the housing. The fan assembly and the non-equilibrium ion alternation generator are electrically connected to a driver disposed at the bottom of the housing.

[0006] In the aforementioned patent documents, the fan blades are positioned closer to the air outlet of the casing. However, when the fan blades are positioned closer to the air outlet, the air duct is short, resulting in a short compressed airflow distance. The distance the airflow travels is affected by the distance of the air duct, thus affecting the air circulation effect. Utility Model Content

[0007] The purpose of this invention is to provide an air duct structure and an air circulator fan to solve the problem that the airflow distance of existing air circulator fans is too short, which affects the air circulation effect.

[0008] To achieve the above objectives, this utility model provides an air circulation fan duct structure, including an intake shell, a blower shell, fan blades, and a drive motor. The intake shell includes a first end and a second end, and the blower shell includes a third end and a fourth end. The second end of the intake shell is connected to the third end of the blower shell. Multiple baffles are provided inside the second end of the intake shell, and multiple guide ribs are provided inside the third end of the blower shell. The guide ribs and the baffles are arranged in a crisscross pattern. The fan blades are disposed inside the intake shell and connected to the drive motor. The drive motor drives the fan blades to rotate, causing airflow to be drawn in from the first end of the intake shell and compressed by the fan blades, then blown out from the fourth end of the blower shell after passing through the baffles and guide ribs.

[0009] Furthermore, a collar is provided inside the first end of the suction cylinder shell, one end of the baffle plate is connected to the inner side wall of the suction cylinder shell, and the other end is connected to the outer side of the collar; the drive motor is located inside the collar.

[0010] Furthermore, the blower housing is provided with an installation cavity, one end of the collar is fitted onto the opening of the installation cavity, the installation cavity is also provided with a fixing frame, and the drive motor is connected to the fixing frame.

[0011] Furthermore, the blower housing also includes an inner cylinder shell. One end of the guide rib is connected to the outer side wall of the inner cylinder shell, and the other end is connected to the inner side wall of the blower housing. The mounting cavity is located inside the inner cylinder shell, which has a cavity for installing the control circuit. A wire-passing groove is provided inside the guide rib, and the end of the wire-passing groove extends into the cavity. The power line connecting the drive motor passes through the wire-passing groove and connects to the drive motor.

[0012] Furthermore, the fan blade includes a connecting sleeve, which is connected to the main shaft of the drive motor; one end of the main body of the drive motor extends into the connecting sleeve, and there is a gap between the end of the connecting sleeve and the end of the collar; the outer diameter of the connecting sleeve is smaller than the inner diameter of the collar and larger than the inner diameter of the mounting cavity; the collar is a conical ring and extends obliquely toward the connecting sleeve.

[0013] Furthermore, one side of the baffle plate has an outer curved surface structure, and the other side has an inner curved surface structure; the curvature of the cross-section of the baffle plate gradually decreases along the outward extension direction of the baffle plate.

[0014] Furthermore, the fan blade includes multiple evenly distributed blades, and an airflow compression port is formed between adjacent blades. The airflow compression port is projected in an arc shape in the axial direction of the fan blade and is arranged intersecting with the baffle plate.

[0015] Furthermore, the connecting sleeve between the blade and the fan blade is integrally injection molded; the blade is distributed at equal angles along the outer side of the connecting sleeve.

[0016] Furthermore, the blower housing is also provided with an inner ring, which extends along the axial direction of the blower housing, and the flow guide rib is provided between the inner ring and the blower housing; the inner sidewall of the blower housing is also provided with a flow-crossing baffle extending from one side of the flow guide rib to the fourth end of the blower housing, and the flow-crossing baffle and the outer sidewall of the inner ring form an airflow compression ring.

[0017] Furthermore, a conical extrusion ring is provided on the inner wall of the fourth end of the blower housing. The diameter of the conical extrusion ring is smaller than the inner diameter of the blower housing, and the flow-through baffle extends to the opening of the conical extrusion ring.

[0018] Furthermore, at least two hooks extend from the outer side of the second end of the suction tube shell, the hooks being provided with buckle holes, and a limiting buckle being provided on the outer side of the blower tube shell, the limiting buckle engaging with the buckle holes.

[0019] The air circulation fan duct structure provided in this embodiment of the utility model has at least the following technical effects:

[0020] 1. The fan blades can be driven by a motor to rotate at high speed. The high-speed rotation of the fan blades can compress air, allowing airflow to be drawn in from the first end of the suction casing and compressed by the fan blades. After passing through the baffles and guide ribs, the airflow is blown out from the fourth end of the blower casing. Therefore, the airflow compressed by the fan blades passes through the suction casing and the blower casing, thereby increasing the airflow compression path distance, which in turn increases the pressure of the compressed airflow, increases the airflow pressure blown out of the blower casing, and thus increases the distance the airflow is blown out, enhancing the air circulation effect.

[0021] 2. The airflow drawn in by the fan blades passes through the baffle ribs, which turbulent the compressed airflow. This prevents problems such as reduced airflow velocity and increased noise caused by pressure imbalances or inconsistent flow directions of the compressed airflow. The airflow passing through the baffle ribs is then guided by the flow guide ribs, resulting in a more stable airflow output.

[0022] An air circulator fan includes the aforementioned air circulator fan duct structure, and further includes a housing, a base, a front mesh, and a rear mesh cover; the suction tube housing and the blowing tube housing are integrally disposed within the housing, and the housing is supported on the base; the front mesh cover is fitted onto the front end of the housing, and the rear mesh cover includes a connecting cylinder, the end of which is provided with an end cap, the connecting cylinder is fitted onto the rear end of the housing, and forms a buffer cavity, the side wall of the connecting cylinder is provided with multiple air grooves, the air grooves extending to the end cap; the fan blades are disposed closer to the buffer cavity.

[0023] Furthermore, a cooling device is also provided inside the buffer cavity.

[0024] The air circulation fan duct structure provided in this embodiment of the utility model has at least the following technical effects:

[0025] By positioning the fan blades closer to the buffer chamber, the suction power within the chamber is maximized, allowing for better intake of air from outside. Furthermore, the air vents in the rear grille help to regulate the airflow entering the buffer chamber, preventing unstable airflow that could lead to excessive noise and weak suction. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 This is a structural diagram of an air circulator fan provided in an embodiment of the present invention.

[0028] Figure 2 A cross-sectional view of an air circulator fan provided in an embodiment of this utility model.

[0029] Figure 3 A structural diagram of the air circulation fan duct structure provided in the embodiment of this utility model.

[0030] Figure 4A cross-sectional view of the air circulation fan duct structure provided in an embodiment of this utility model.

[0031] Figure 5 This is a reverse structural view of the suction cylinder shell of the air circulation fan duct structure provided in the embodiment of this utility model.

[0032] Figure 6 The front view of the suction cylinder shell of the air circulation fan duct structure provided in the embodiment of this utility model.

[0033] Figure 7 A front view of the blower housing of the air circulation fan duct structure provided in this embodiment of the utility model.

[0034] Figure 8 This is a reverse structural view of the blower casing of the air circulation fan duct structure provided in the embodiment of this utility model. Detailed Implementation

[0035] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the embodiments of this utility model, and should not be construed as limiting the utility model.

[0036] In the description of the embodiments of this utility model, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0037] 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 one or more of that feature. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0038] In this embodiment of the invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," 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 or an electrical connection; 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. Those skilled in the art can understand the specific meaning of the above terms in this embodiment of the invention according to the specific circumstances.

[0039] In one embodiment of the air circulator fan of this utility model, please refer to... Figure 1 and Figure 2 An air circulator fan includes an air duct structure 10, a housing 20, a base 30, a front grille 40, and a rear grille cover 50.

[0040] Among them, reference Figures 3 to 8 The air duct structure 10 includes an intake casing 100, a blower casing 200, a fan blade 300, and a drive motor 400. The intake casing 100 has a first end 101 and a second end 102, and the blower casing 200 has a third end 201 and a fourth end 202. The second end 102 of the intake casing 100 is connected to the third end 201 of the blower casing 200. The second end 102 of the intake casing 100 has multiple baffles 110, and the third end 201 of the blower casing 200 has multiple guide ribs 210, which are arranged intersectingly with the baffles 110. The fan blade 300 is disposed inside the intake casing 100 and is connected to the drive motor 400. The drive motor 400 drives the fan blades 300 to rotate, causing airflow to be drawn in from the first end 101 of the suction casing 100 and compressed by the fan blades 300. After passing through the baffle 110 and the guide ribs 210, the airflow is blown out from the fourth end 202 of the blower casing 200. Therefore, the airflow compressed by the fan blades 300 passes through the suction casing 100 and the blower casing 200, thereby increasing the airflow compression path distance, which increases the pressure of the compressed airflow, increases the pressure of the airflow blown out of the blower casing, and thus increases the distance and force of the airflow, achieving the effect of increasing air circulation. In addition, the airflow drawn in by the fan blades 300 passes through the baffle ribs 110, which turbulently ...

[0041] Furthermore, referring to Figure 1 and Figure 2The suction tube housing 100 and the blower housing 200 are integrally housed within the outer casing 20, which is supported on the base 30. The front mesh 40 covers the front end of the outer casing 20, and the rear mesh cover 50 includes a connecting cylinder 51. The end of the connecting cylinder 51 is provided with an end cap 52. The connecting cylinder 51 is detachably fitted onto the rear end of the outer casing 20, forming a buffer cavity 53. Preferably, a buckle 120 extends from the first end 101 of the suction tube housing 100, with a locking groove 121. A hook 54 is provided on the inner wall of the connecting cylinder 51; and a stepped ring 55 is provided at the end of the connecting cylinder 51. When assembling the rear mesh cover 50 with the outer casing 20, the stepped ring 55 can be inserted into the interior of the outer casing 20, and then the rear mesh cover 50 can be rotated to engage the hook 54 into the locking groove 121. The rear mesh cover 50 and the suction tube housing 100 are then fixed in place, and the rear mesh cover 50 covers the outer casing 20. The side wall of the connecting cylinder 51 is provided with multiple air ducts 57, which extend to the end cover 52. The fan blade 300 is positioned closer to the buffer chamber 53, which maximizes the suction force within the buffer chamber 53 and allows air from outside the buffer chamber 53 to enter the buffer chamber 53 more effectively. Furthermore, the air ducts 57 on the rear mesh cover 50 help to regulate the airflow entering the buffer chamber 53, preventing unstable airflow that could lead to high wind noise and low suction.

[0042] Furthermore, refer to Figure 2 A cooling device 56 can also be installed inside the buffer chamber 53. Therefore, the airflow drawn into the buffer chamber 53 can be cooled by absorbing heat through the cooling device 56, achieving the effect of blowing cold air. The cooling device 56 can be an ice pack, a cooling plate, etc.

[0043] Furthermore, refer to Figures 2 to 8 The first end of the suction duct housing 100 is also provided with a collar 130. One end of the baffle rib 110 is connected to the inner side wall of the suction duct housing 100, and the other end is connected to the outer side of the collar 130. The drive motor 400 is located inside the collar 130. By placing the drive motor 400 on the side where the fan blades 300 are venting, the airflow generated by the fan blades 300 can be used to dissipate heat from the drive motor 400, preventing the drive motor 400 from overheating during operation and ensuring its service life. In addition, more environmentally friendly materials can be used, such as aluminum coils in the drive motor 400, which saves costs while effectively controlling the temperature of the drive motor 400. Furthermore, by placing the drive motor 400 inside the collar 130, the drive motor 400 occupies the space between the suction duct housing 100 and the blower housing 200. Compared to having the fan blades located at the front end of the motor, this shortens the length of the suction duct housing 100, thereby reducing the overall size.

[0044] Furthermore, refer to Figure 2 , Figure 4 and Figure 7The blower housing 200 is also provided with an installation cavity 220. One end of the collar 130 is fitted into the opening of the installation cavity 220. The installation cavity 220 is also provided with a fixing frame 221. The drive motor 400 is connected to the fixing frame 221.

[0045] Furthermore, refer to Figure 2 , Figure 4 and Figure 8 The blower housing 200 also includes an inner housing 230. One end of the guide rib 210 is connected to the outer wall of the inner housing 230, and the other end is connected to the inner wall of the blower housing 200. An installation cavity 220 is located within the inner housing 230, which contains a cavity 231 for mounting control circuits, etc. To power the control circuit and the drive motor 400, a wire-passing groove 211 is provided within one of the guide ribs 210, with its end extending into the cavity 231. The power cable connecting the drive motor 400 passes through the wire-passing groove 211 and connects to the drive motor 400.

[0046] Furthermore, refer to Figure 4 and Figure 6 The fan blade 300 includes a connecting sleeve 310 and blades 320. The connecting sleeve 310 is connected to the main shaft of the drive motor 400. The blades 320 are arranged at equal angles on the outer side of the connecting sleeve 310. One end of the main body of the drive motor 400 extends into the connecting sleeve 310. There is a gap between the end of the connecting sleeve 310 and the end of the collar 130. The outer diameter of the connecting sleeve 310 is smaller than the inner diameter of the collar 130 but larger than the inner diameter of the mounting cavity 220. Therefore, when the fan blade 300 rotates, the root of the blade 320 has a small centrifugal force, so a weak airflow is formed and enters the mounting cavity 220 through the gap, achieving heat dissipation and cooling of the drive motor 400 in the mounting cavity 220. Furthermore, the collar 130 is a conical ring and extends obliquely towards the connecting sleeve 310, so the airflow formed when the blade 320 rotates is guided into the air duct along the conical surface.

[0047] Furthermore, refer to Figure 8 The baffle 110 extends in an arc shape, with one side having an outer curved surface and the other side having an inner curved surface. The curvature of the cross-section of the baffle 110 gradually decreases along the outward extension direction. Specifically, in this embodiment, when the fan blade 300 rotates at high speed, the centrifugal force is greater closer to the outer ring, resulting in greater airflow pressure. The curvature of the cross-section of the baffle 110 is smaller closer to the outer edge, thus reducing airflow resistance. Therefore, it achieves optimal reduction of airflow resistance while maintaining stable airflow.

[0048] Furthermore, refer to Figure 5 and Figure 6An airflow compression port 321 is formed between adjacent blades 320 of the fan blade 300. The airflow compression port 321 is projected as an arc structure in the axial direction of the fan blade 300 and is intersected with the baffle 110. In this embodiment, when the fan blade 300 rotates at high speed, the airflow enters through the airflow compression port 321, thereby compressing the airflow. Since the airflow compression port 321 and the baffle 110 are intersected, the compressed airflow will cross the baffle 110, allowing the baffle 110 to cut the airflow and effectively avoid problems such as mutual collision and interference of the compressed airflow.

[0049] Furthermore, the blades 320 and the connecting sleeve 310 are integrally injection molded, and the blades 320 are distributed at equal angles along the outer side of the connecting sleeve 310. Therefore, in this embodiment, the consistency of the blade distribution can be ensured, thereby guaranteeing the dynamic balance of the fan blades 300 when rotating at high speed.

[0050] Furthermore, refer to Figure 4 , Figure 7 and Figure 8 The outer side of the inner cylinder shell 230 within the blower casing 200 forms an inner ring structure, which extends axially along the blower casing 200. A guide rib 210 is disposed between the inner ring and the blower casing 200. The inner wall of the blower casing 200 also has a flow-crossing baffle 240 extending from one side of the guide rib 210 towards the fourth end 202 of the blower casing 200. The flow-crossing baffle 240 and the outer wall of the inner ring form an airflow compression annular cavity structure. Specifically, in this embodiment, when the fan blade 300 rotates at high speed, the airflow velocity and pressure are higher closer to the outer ring. Even after passing through the turbulence rib 110 and the guide rib 210, the airflow velocity and pressure are still higher in the outer ring closer to the outer edge. Therefore, the airflow speed and pressure are greater near the inner wall of the blower housing 200. Setting multiple flow-crossing baffles 240 on the inner wall of the blower housing 200 can prevent the airflow near the outer ring from colliding and interfering with each other, thus preventing flow-crossing. It can better guide the airflow and distinguish the airflow speed and pressure.

[0051] Furthermore, a conical compression ring 250 is provided on the inner sidewall of the fourth end of the blower housing 200. The diameter of the conical compression ring 250 is smaller than the inner diameter of the blower housing 200, and the flow-crossing baffle 240 extends to the opening of the conical compression ring 250. In this embodiment, by reducing the diameter of the air outlet, the airflow can be further compressed, increasing the output pressure of the airflow and thus increasing the effective distance of the airflow.

[0052] Furthermore, refer to Figure 3At least two lugs 103 extend from the outer side of the second end 102 of the suction tube housing 100. The lugs 103 are provided with buckle holes. The outer side of the blower housing 200 is provided with a limiting buckle 203, which engages with the buckle holes. This makes the suction tube housing 100 and the blower housing 200 a single unit.

[0053] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An air circulation fan duct structure, characterized in that, The device includes an air intake shell, an air blower shell, fan blades, and a drive motor. The air intake shell has a first end and a second end, and the air blower shell has a third end and a fourth end. The second end of the air intake shell is connected to the third end of the air blower shell. The second end of the air intake shell is provided with multiple baffles, and the third end of the air blower shell is provided with multiple guide ribs. The guide ribs and the baffles are arranged in a crisscross pattern. The fan blades are disposed inside the air intake shell and are connected to the drive motor. The drive motor drives the fan blades to rotate, so that airflow is drawn in from the first end of the air intake shell and squeezed by the fan blades, and then blown out from the fourth end of the air blower shell after passing through the baffles and the guide ribs.

2. The air circulation fan duct structure according to claim 1, characterized in that: The first end of the suction cylinder shell is also provided with a collar, one end of the baffle plate is connected to the inner side wall of the suction cylinder shell, and the other end is connected to the outer side of the collar; the drive motor is located inside the collar.

3. The air circulation fan duct structure according to claim 2, characterized in that: The blower housing is further provided with an installation cavity, one end of the collar is fitted onto the opening of the installation cavity, and a fixing frame is also provided inside the installation cavity, with the drive motor connected to the fixing frame.

4. The air circulation fan duct structure according to claim 3, characterized in that: The blower housing also includes an inner cylinder shell. One end of the guide rib is connected to the outer side wall of the inner cylinder shell, and the other end is connected to the inner side wall of the blower housing. The mounting cavity is located inside the inner cylinder shell, which has a cavity for installing the control circuit. A wire-passing groove is provided inside the guide rib, and the end of the wire-passing groove extends into the cavity. The power line connecting the drive motor passes through the wire-passing groove and connects to the drive motor.

5. The air circulation fan duct structure according to claim 4, characterized in that: The fan blade includes a connecting sleeve, which is connected to the main shaft of the drive motor; one end of the main body of the drive motor extends into the connecting sleeve, and there is a gap between the end of the connecting sleeve and the end of the collar; the outer diameter of the connecting sleeve is smaller than the inner diameter of the collar and larger than the inner diameter of the mounting cavity; the collar is a conical ring and extends obliquely toward the connecting sleeve.

6. The air circulation fan duct structure according to any one of claims 1 to 5, characterized in that: One side of the baffle plate has an outer curved surface structure, and the other side has an inner curved surface structure; the curvature of the cross-section of the baffle plate gradually decreases along the outward extension direction of the baffle plate.

7. The air circulation fan duct structure according to claim 5, characterized in that: The fan blade includes multiple evenly distributed blades, and an airflow compression port is formed between adjacent blades. The airflow compression port is projected in an arc shape in the axial direction of the fan blade and is arranged intersecting with the baffle plate.

8. The air circulation fan duct structure according to claim 7, characterized in that: The blade and the connecting sleeve of the fan blade are integrally injection molded; the blade is distributed at equal angles along the outer side of the connecting sleeve.

9. The air circulation fan duct structure according to claim 7, characterized in that: The blower housing is further provided with an inner ring that extends along the axial direction of the blower housing. The guide rib is located between the inner ring and the blower housing. The inner sidewall of the blower housing is also provided with a flow-crossing baffle that extends from one side of the guide rib to the fourth end of the blower housing. The flow-crossing baffle and the outer sidewall of the inner ring form an airflow compression ring.

10. The air circulation fan duct structure according to claim 9, characterized in that: The inner wall of the fourth end of the blower housing is provided with a conical extrusion ring. The diameter of the conical extrusion ring is smaller than the inner diameter of the blower housing. The flow-through baffle extends to the opening of the conical extrusion ring.

11. The air circulation fan duct structure according to any one of claims 1 to 5, characterized in that: At least two hanging ears extend from the outer side of the second end of the air intake shell. The hanging ears are provided with buckle holes. The outer side of the air blower shell is provided with a limiting buckle, which engages with the buckle holes.

12. An air circulator fan, characterized in that, The air circulation fan duct structure according to any one of claims 1 to 10 further includes a housing, a base, a front mesh, and a rear mesh cover; the suction cylinder housing and the blowing cylinder housing are integrally disposed within the housing, and the housing is supported on the base; the front mesh cover is fitted onto the front end of the housing, the rear mesh cover includes a connecting cylinder, the end of the connecting cylinder is provided with an end cap, the connecting cylinder is fitted onto the rear end of the housing and forms a buffer cavity, the side wall of the connecting cylinder is provided with a plurality of air grooves, the air grooves extend to the end cap; the fan blades are disposed closer to the buffer cavity.

13. The air circulator fan according to claim 12, characterized in that: The buffer chamber is also equipped with a cooling device.

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