Circulating fan

Abstract

The invention discloses a circulating fan which comprises a front mesh enclosure, fan blades, a rear mesh enclosure, a motor, a motor cover, a head shaking device and a middle shaft and further comprises a fan middle cover, the head shaking device comprises a bearing mounting base, a bearing, a fixing base, a head shaking gear, a head shaking motor and a head shaking motor mounting base, and the middle cover comprises a first semicircular fan middle cover and a second semicircular fan middle cover. A first fan middle cover is provided with a shaft hole, a rotating gear matched with a rotating gear of the oscillating motor is arranged on the outer side edge of an oscillating gear with an inner shaft hole, a fan motor base is arranged in the center of the rear mesh enclosure, and the motor base is connected with a rear mesh enclosure rib. The fan has the advantages that the head shaking device is arranged in the fan middle cover, the gravity center of the fan is more stable, the fan is more stable and quiet during head shaking work, the head shaking device cannot be seen from the appearance, the fan is simpler and more attractive, the air inlet face of the rear mesh enclosure of the fan is larger than the air outlet face of the front mesh enclosure, air blown out by the fan during blowing work is farther, and airflow is strengthened powerfully.

Description

Technical Field

[0001] This invention relates to the field of fan technology, and in particular to a circulating fan. Background Technology

[0002] Existing circulating fans mainly consist of a fan housing, an air inlet shroud, an air outlet shroud, and a fan assembly. The fan housing is cylindrical with an air inlet and an air outlet at both ends. The air inlet and air outlet shrouds are located at the air inlet and air outlet ends, respectively. The fan assembly is connected inside the fan housing and located between the air inlet and air outlet, allowing air to be drawn into the fan housing. The high-speed rotation of the fan assembly creates airflow that is blown out from the air outlet. To achieve air convection and expand the blowing angle, an oscillating motor assembly is usually installed outside the fan housing for left and right oscillation. Typically, the diameter of the air outlet shroud is larger than that of the air inlet. However, the oscillating motor assembly installed outside the fan housing generates noise and affects the fan's appearance. Furthermore, the increased airflow velocity at the air outlet due to the larger outlet diameter results in a shorter blowing distance, weak air directionality, and poor air focusing, making it difficult to meet user needs. Summary of the Invention

[0003] In view of the above-mentioned shortcomings, the designer actively researched and innovated in order to create a new type of circulating fan with greater industrial application value.

[0004] The present invention achieves the above objectives through the following technical solutions: A circulating fan includes a cylindrical front fan guard, fan blades, a cylindrical rear fan guard, a fan motor, a motor cover, an oscillation device, and a fan shaft. It also includes an annular fan middle cover with a fan-shaped cross-section. The oscillation device includes a bearing mounting seat with an inner shaft hole, a bearing, a tubular bearing fixing seat with an inner hole, an oscillation gear with an inner shaft hole, an oscillation motor with a rotating gear, and an oscillation motor mounting seat. The fan middle cover includes two symmetrical semi-circular fan middle covers: a first semi-circular fan middle cover and a second semi-circular fan middle cover. The first fan middle cover has a shaft hole in the middle of its inner wall, and a mounting screw hole for fixing the oscillation motor mounting seat is located next to the shaft hole in the middle of the inner wall of the first fan middle cover. The outer edge of the oscillation gear with the inner shaft hole has a rotating gear that meshes with the rotating gear of the oscillation motor.

[0005] As a further measure, the front fan cover is integrally formed with an L-shaped convex step-shaped annular air duct for guiding airflow, and an air outlet mesh with ribs arranged clockwise is integrally formed on one end face of the front fan cover. The ribs of the front fan outlet mesh are arranged clockwise.

[0006] As a further measure, one end face of the rear fan cover is integrally formed with an air intake mesh with ribs arranged counterclockwise; the center of the rear fan cover (4) is integrally formed with a fan motor mounting seat (402) for mounting the fan motor (5); the fan motor mounting seat (402) is set on the ribs of the rear fan cover (4); the inner diameter of the cylindrical rear fan cover is larger than the inner diameter of the annular air duct of the front fan cover.

[0007] As a further measure, the inner diameter of the annular structure formed by the symmetrical fan cover one and the fan cover two is set such that the inner diameter of the front end is the same as the outer diameter of the annular air duct of the fan front mesh cover, and the inner diameter of the annular structure formed by the symmetrical fan cover one and the fan cover two is set such that the inner diameter of the rear end is the same as the outer diameter of the cylindrical fan rear mesh cover.

[0008] As a further measure, the interfaces of the first and second fan covers are respectively provided with mortises and tenons for connection and fixation.

[0009] Furthermore, the inner diameter of the bearing mounting base is the same as and closely fits the outer diameter of the bearing; the outer diameter of the lower end circle of the bearing fixing base is the same as and closely fits the inner diameter of the bearing; and the inner diameter of the bearing fixing base is the same as and closely fits the outer diameter of the fan shaft.

[0010] Compared with the prior art, the beneficial effects of the present invention are as follows: The oscillation mechanism is built into the fan's inner cover, making the fan's center of gravity more stable. This reduces the motor load and results in a more stable and quieter operation during oscillation. The oscillation mechanism is invisible, contributing to a cleaner and more aesthetically pleasing design. Furthermore, because the inner diameter of the cylindrical rear fan grille is larger than the inner diameter of the annular air duct in the front fan grille, the air duct design, with its larger inlet and outlet surfaces, allows for better air pressure build-up within the duct, resulting in more concentrated airflow. This leads to a stronger, farther-reaching, and more cooling effect. Additionally, the clockwise arrangement of the ribs on the front exhaust grille facilitates coaxial airflow, while the counter-clockwise arrangement of the ribs on the rear intake grille ensures coaxial airflow, resulting in smoother airflow. The fan motor mounting base is located on the ribs of the rear fan grille, reducing the number of motor mounting brackets, effectively reducing wind resistance and noise during operation, and improving airflow delivery. Attached Figure Description

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, 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 the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0012] Figure 1 This is an exploded view of a circulating fan device according to the present invention; Figure 2 This is a schematic diagram of the oscillating device structure of a circulating fan according to the present invention; Figure 3 This is a schematic diagram of the installation of the fan cover and oscillating device of the circulating fan described in this invention.

[0013] Figure 4 This is a schematic diagram of the fan cover structure of a circulating fan according to the present invention; Figure 5 , Figure 6 This is a schematic diagram of the structure of the fan motor mounting base in the rear fan cover of a circulating fan according to the present invention.

[0014] Explanation of reference numerals in the attached drawings: 1. Front fan guard; 2. Fan blade; 3. Fan middle cover; 4. Rear fan guard; 5. Fan motor; 6. Motor cover; 7. Oscillating device; 8. Fan central shaft; 9. ; 31. Fan middle cover one; 32. Fan middle cover two; 101. Circular air duct; 102. Air outlet mesh; 401. Air inlet mesh; 402. Fan motor mounting base; 701. Bearing mounting base; 702. Bearing; 703. Bearing fixing base; 704. Oscillating gear; 705. Oscillating motor; 706. Oscillating motor mounting base; 707. Rotating gear. Detailed Implementation

[0015] The present invention will be further described below with reference to embodiments and accompanying drawings: like Figure 1As shown in Figure 6, a circulating fan includes a cylindrical front fan cover 1, fan blades 2, an annular fan middle cover 3 with a fan-shaped cross-section, a cylindrical rear fan cover 4, a fan motor 5, a motor cover 6, an oscillating device 7, and a fan shaft 8. The front fan cover 1 has an integrally formed annular air duct 101 with an L-shaped convex step cross-section for guiding airflow. An air outlet mesh 102 with clockwise ribs is integrally formed on one end face of the front fan cover 1. The ribs of the front air outlet mesh 102 are arranged clockwise. An air inlet mesh 401 with counter-clockwise ribs is integrally formed on one end face of the rear fan cover 4. A fan motor mounting base 402 for mounting the fan motor 5 is integrally formed at the center of the rear fan cover 4. The fan motor mounting base 402 is positioned on the fan... On the ribs of the rear fan guard 4; the shape and size of the fan motor mounting base 402 match the fan motor 5. The inner diameter of the cylindrical rear fan guard 4 is larger than the inner diameter of the annular air duct 101 of the front fan guard 1. The oscillating device 7 includes a bearing mounting base 701 with an inner shaft hole, a bearing 702, a tubular bearing fixing base 703 with an inner hole, an oscillating gear 704 with an inner shaft hole, an oscillating motor 705 with a rotating gear, and an oscillating motor mounting base 706. The diameter of the inner shaft hole of the bearing mounting base 701 is the same as and tightly fits the outer diameter of the bearing 702. The outer diameter of the lower end of the bearing fixing base 703 is the same as and tightly fits the inner diameter of the bearing 702. The inner diameter of the bearing fixing base 703 is the same as and tightly fits the outer diameter of the fan central shaft 8.The fan cover 3 includes two symmetrical semi-circular fan cover 31 and a semi-circular fan cover 32. The inner diameter of the annulus formed by the symmetrical fan cover 31 and the fan cover 32 is set such that the inner diameter of the front end is the same as the outer diameter of the annular air duct 101 of the fan front grille 1. The inner diameter of the annulus formed by the symmetrical fan cover 31 and the fan cover 32 is set such that the inner diameter of the rear end is the same as the outer diameter of the cylindrical fan rear grille 4. The interfaces of the fan cover 31 and the fan cover 32 are respectively provided with mortises and tenons for connection and fixation. A shaft hole 301 is provided in the middle of the inner wall of the middle cover 31. Next to the shaft hole 301 in the middle of the inner wall of the middle cover 31, there is a mounting screw hole for fixing the oscillating motor mounting base 706. The outer edge of the oscillating gear 704 with an inner shaft hole has a rotating gear 707 that meshes with the rotating gear of the oscillating motor 705. The front fan grille 1, fan blades 2, middle cover 31, middle cover 32, rear fan grille 4, fan motor 5, motor cover 6, and fan shaft 8 all have screw holes for installation and connection. During installation, the bearing 702 is tightly nested inside the inner shaft hole 301 of the bearing mounting base 701. 1. Insert the lower end of the bearing mounting base 703 into the inner hole of the bearing 702 and fit it tightly. Secure the oscillating gear 704 to the upper end of the bearing mounting base 703 with screws, ensuring the inner shaft holes are aligned and the rotating gear 708 is on the same side as the oscillating motor mounting base 706. Then, sequentially pass the upper end of the fan shaft 8 through the shaft hole 301, the inner hole of the bearing mounting base 703, and the inner shaft hole of the oscillating gear 704, and lock it in place with lateral screws. Finally, fix the oscillating motor 705 to the motor mounting base 7 with screws, ensuring the rotating gear engages with the rotating gear 707 of the oscillating gear 704. On step 06, place the fan motor 5 inside the fan motor mounting base 402 of the rear fan cover 4 and secure it with screws. Install the motor cover 6 on the outer rear end of the fan motor 5. Install and fix the fan blade 2 on the rotating shaft at the front end of the fan motor 5. Connect the fan middle cover 31 and fan middle cover 32 with mortise and tenon joints to form a circular fan middle cover 3. Place the rear fan cover 4, which has the fan motor 5 and fan blade 2 installed, inside the rear end of the ring of the fan middle cover 3 and secure it with screws. Then, insert the circular air duct 101 of the front fan cover into the front end of the ring of the fan middle cover 3 and secure it with screws.In terms of effectiveness, the oscillation mechanism is primarily integrated within the fan's inner cover, resulting in a more stable center of gravity. This reduces motor load and makes the fan more stable and quiet during oscillation. The oscillation mechanism is also invisible, contributing to a cleaner and more aesthetically pleasing design. Furthermore, because the inner diameter of the cylindrical rear fan grille 4 is larger than the inner diameter of the annular air duct 101 of the front fan grille 1, the fan's inlet surface is larger than its outlet surface. During operation, the clockwise arrangement of the ribs on the front outlet grille facilitates coaxial airflow, while the counter-clockwise arrangement of the ribs on the rear inlet grille promotes coaxial airflow, resulting in smoother airflow. The fan motor mounting base is located on the ribs of the rear fan grille 4, reducing the number of motor mounting brackets. This not only enhances the working stress of the motor mount but also effectively reduces wind resistance and fan noise, improving airflow delivery and resulting in a stronger and more powerful airflow.

[0016] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A circulating fan, comprising a cylindrical fan front guard (1), fan blades (2), a cylindrical fan rear guard (4), a fan motor (5), a motor cover (6), an oscillation device (7), and a fan central shaft (8), characterized in that: It also includes a circular fan cover (3) with a fan-shaped cross section; the oscillating device (7) includes a bearing mounting seat (701) with an inner shaft hole, a bearing (702), a tubular bearing fixing seat (703) with an inner hole, an oscillating gear (704) with an inner shaft hole, an oscillating motor (705) with a rotating gear, and an oscillating motor mounting seat (706); the fan cover (3) includes a semi-circular fan cover one (31) and a semi-circular fan cover two (32) that are symmetrical to each other. The inner wall of the fan cover one (31) is provided with a shaft hole (301) in the middle. The inner wall of the fan cover one (31) is provided with a mounting screw hole for fixing the oscillating motor mounting seat (706) next to the shaft hole (301) in the middle. The outer edge of the oscillating gear (704) with an inner shaft hole is provided with a rotating gear (707) that cooperates with the rotating gear of the oscillating motor (705); the front fan cover (1) is integrally formed with an L-shaped convex step-shaped annular air duct (101) for guiding air; the end face of the front fan cover (1) is integrally formed with an air outlet grid (102) with ribs arranged in a clockwise direction; the end face of the rear fan cover (4) is integrally formed with an air inlet grid (401) with ribs arranged in a counterclockwise direction; the center of the rear fan cover (4) is integrally formed with a fan motor mounting seat (402) for installing the fan motor (5), and the fan motor mounting seat (402) is set on the ribs of the rear fan cover (4).

2. A circulating fan according to claim 1, characterized in that: The shape and size of the fan motor mounting bracket (402) are matched with the fan motor (5).

3. A circulating fan according to claim 2, characterized in that: The inner diameter of the cylindrical fan rear grille (4) is larger than the inner diameter of the annular air duct (101) of the fan front grille (1).

4. A circulating fan according to claim 3, characterized in that: The inner diameter of the annular structure formed by the symmetrical fan cover one (31) and the fan cover two (32) is set such that the inner diameter of the front end is the same as the outer diameter of the annular air duct (101) of the fan front mesh cover (1); the inner diameter of the annular structure formed by the symmetrical fan cover one (31) and the fan cover two (32) is set such that the inner diameter of the rear end is the same as the outer diameter of the cylindrical fan rear mesh cover (4).

5. A circulating fan according to claim 1, characterized in that: The interfaces of the fan cover 1 (31) and the fan cover 1 (32) are respectively provided with mortise holes and tenon structures for connection and fixation.

6. A circulating fan according to claim 1, characterized in that: The inner diameter of the bearing mounting base (701) is the same as the outer diameter of the bearing (702) and fits tightly; the outer diameter of the lower end circle of the bearing fixing base (703) is the same as the inner diameter of the bearing (702) and fits tightly; the inner diameter of the bearing fixing base (703) is the same as the outer diameter of the fan shaft (8) and fits tightly.

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