Circulating fan

Abstract

The utility model 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, a middle shaft and a fan middle cover, the head shaking device comprises a bearing mounting seat, a bearing, a fixed seat, a head shaking gear, a head shaking motor and a head shaking motor mounting seat, and the middle cover comprises a semicircular fan middle cover I and a semicircular fan middle cover II. 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] The utility model relates to the technical field of fans, in particular to a circulation fan. Background Art

[0002] Existing circulation fans mainly include structures such as a fan housing, an air inlet cover, an air outlet cover, and a fan assembly. Among them, the fan housing is in a cylindrical structure, with a connected air inlet and an air outlet at both ends. The air inlet cover and the air outlet cover are respectively arranged at the air inlet end and the air outlet end. The fan assembly is connected inside the fan housing and is located between the air inlet and the air outlet, so that the air at the air inlet can be sucked into the interior of the fan housing. Through the high-speed operation of the fan assembly, an air flow is formed and blown out from the air outlet. To enable air convection movement in the room and expand the blowing angle, a swing motor assembly is usually arranged outside the fan housing to swing left and right. Usually, the air outlet diameter of the air outlet cover is larger than the air inlet diameter. However, when the swing motor assembly arranged outside the fan housing swings, there is noise and it affects the appearance of the fan. At the same time, the air flow blown out from its air outlet has a fast attenuation of the air flow velocity due to the larger air outlet diameter, the blown air has a short distance, weak directivity of the wind, and weak beam sense of the wind, which is difficult to meet the needs of users. Summary of the Invention

[0003] In view of the above defects, the designer actively conducts research and innovation in order to create a circulation fan with a new structure, making it more valuable in industrial use.

[0004] The utility model realizes the above object through the following technical solutions:

[0005] A circulation fan includes a cylindrical fan front grille, fan blades, a cylindrical fan rear grille, a fan motor, a motor cover, a swing device, and a fan central axis. It also includes a fan middle cover that is circular and has a fan-shaped cross-section. The swing device includes a bearing mounting seat with an inner shaft hole, a bearing, a pipe-shaped bearing fixing seat with an inner hole, a swing gear with an inner shaft hole, a swing motor with a rotating gear, and a swing motor mounting seat. The fan middle cover includes semi-circular fan middle cover one and semi-circular fan middle cover two that are symmetric to each other. There is a shaft hole in the middle of the inner wall of the fan middle cover one, and an installation screw hole for fixing the swing motor mounting seat is provided beside the shaft hole in the middle of the inner wall of the fan middle cover one. The outer edge of the swing gear with an inner shaft hole is provided with a rotating gear that cooperates with the rotating gear of the swing motor.

[0006] Furthermore, a circular air duct with an L-shaped convex step profile for guiding air is integrally formed on the fan front grille. An air outlet grid with ribs arranged clockwise is integrally formed on one end face of the fan front grille, and the ribs of the fan front air outlet grille are arranged clockwise.

[0007] Further measures: on one end face of the rear fan grille, an air inlet grid with ribs arranged in a counterclockwise direction is integrally formed; at the center of the rear fan grille (4), a fan motor mounting seat (402) for mounting the fan motor (5) is integrally formed; the fan motor mounting seat (402) is arranged on the ribs of the rear fan grille (4); the inner circular diameter of the cylindrical rear fan grille is larger than the circular inner diameter of the annular air duct of the front fan grille;

[0008] Further measures: the inner diameter of the circular ring formed by symmetrically combining the first fan middle cover and the second fan middle cover is set such that the front inner diameter is the same as the outer diameter of the annular air duct of the front fan grille, and the inner diameter of the circular ring formed by symmetrically combining the first fan middle cover and the second fan middle cover is set such that the rear inner diameter is the same as the outer diameter of the cylindrical rear fan grille;

[0009] Further measures: at the interfaces of the first fan middle cover and the second fan middle cover, corresponding mortise holes and tenon structures for connecting and fixing are provided;

[0010] Further measures: the inner shaft hole diameter of the bearing mounting seat is the same as the outer diameter of the bearing and is in tight fit; the lower end circular outer diameter of the bearing fixing seat is the same as the inner diameter of the bearing and is in tight fit; the inner diameter of the bearing fixing seat is the same as the outer diameter of the fan middle shaft and is in tight fit.

[0011] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0012] The shaking device is built into the fan middle cover, making the center of gravity of the fan more stable. When the fan shakes, the motor load is reduced and it is more stable, quiet; the shaking device is not visible on the appearance, making it more simple and beautiful; at the same time, since the inner circular diameter of the cylindrical rear fan grille is larger than the circular inner diameter of the annular air duct of the front fan grille, the air inlet surface of the fan being larger than the air outlet surface of the air duct design is conducive to pressurizing the air inhaled by the fan during operation in the air duct, making the air flow more concentrated, so that the blown air is stronger, can be blown farther, and has a stronger sense of coolness. In addition, when the fan blows air, the ribs of the front air outlet grille of the fan are arranged clockwise, which is conducive to the fan outputting wind axially during operation, and the ribs of the rear air inlet grille of the fan are arranged counterclockwise, which is conducive to the fan inhaling air axially during operation, making the air intake and exhaust smoother;; the fan motor mounting seat is arranged on the ribs of the rear fan grille, reducing the number of brackets of the motor mounting seat, effectively reducing the wind resistance and reducing the noise during the operation of the fan, which is conducive to the delivery of wind power. Description of the Drawings

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0014] Figure 1 is an exploded view of the device of a circulation fan described in the present invention;

[0015] Figure 2 is a schematic structural diagram of the swing device of a circulation fan described in the present invention;

[0016] Figure 3 is a schematic installation diagram of the first fan middle cover and the swing device of a circulation fan described in the present invention;

[0017] Figure 4 is a schematic structural diagram of the second fan middle cover of a circulation fan described in the present invention;

[0018] Figure 5 、 Figure 6 is a schematic structural diagram of the fan motor mounting seat in the fan rear grille of a circulation fan described in the present invention.

[0019] Explanation of reference numerals: 1. Fan front grille; 2. Fan blade; 3. Fan middle cover; 4. Fan rear grille; 5. Fan motor; 6. Motor cover; 7. Swing device; 8. Fan middle shaft; 31. First fan middle cover; 32. Second fan middle cover; 101. Circular air duct; 102. Air outlet grid; 401. Air inlet grid; 402. Fan motor mounting seat; 701. Bearing mounting seat; 702. Bearing; 703. Bearing fixing seat; 704. Swing gear; 705. Swing motor; 706. Swing motor mounting seat; 707. Rotating gear. Detailed implementation manners

[0020] The following further illustrates the present invention in conjunction with the embodiments and the drawings:

[0021] Such as Figure 1As shown in FIGS. -6, a circulation fan includes a cylindrical front fan grille 1, fan blades 2, a circular fan middle cover 3 with a fan-shaped cross-section, a cylindrical rear fan grille 4, a fan motor 5, a motor cover 6, a shaking device 7, and a fan central shaft 8. An annular air duct 101 with an L-shaped convex step cross-section for guiding air is integrally formed on the front fan grille 1. An air outlet grid 102 with ribs arranged clockwise is integrally formed on one end face of the front fan grille 1. The ribs of the front air outlet fan grille are arranged clockwise. An air inlet grid 401 with ribs arranged counterclockwise is integrally formed on one end face of the rear fan grille 4. A fan motor mounting seat 402 for mounting the fan motor 5 is integrally formed at the center of the rear fan grille 4. The fan motor mounting seat 402 is arranged on the ribs of the rear fan grille 4. The shape and size of the fan motor mounting seat 402 are matched with those of the fan motor 5. The inner circular diameter of the cylindrical rear fan grille 4 is larger than the inner circular diameter of the annular air duct 101 of the front fan grille 1. The shaking device 7 includes a bearing mounting seat 701 with an inner shaft hole, a bearing 702, a pipe-shaped bearing fixing seat 703 with an inner hole, a shaking gear 704 with an inner shaft hole, a shaking motor 705 with a rotating gear, and a shaking motor mounting seat 706. The diameter of the inner shaft hole of the bearing mounting seat 701 is the same as the outer diameter of the bearing 702 and they are closely matched. The outer circular diameter of the lower end of the bearing fixing seat 703 is the same as the inner diameter of the bearing 702 and they are closely matched. The inner diameter of the bearing fixing seat 703 is the same as the outer diameter of the fan central shaft 8 and they are closely matched,The middle fan cover 3 includes a semi-circular ring-shaped first middle fan cover 31 and a semi-circular ring-shaped second middle fan cover 32 that are symmetric to each other. The inner diameter of the circular ring formed by the symmetric combination of the first middle fan cover 31 and the second middle fan cover 32 is set such that the front-end inner diameter is the same as the outer diameter of the circular duct 101 of the front fan grille 1. The inner diameter of the circular ring formed by the symmetric combination of the first middle fan cover 31 and the second middle fan cover 32 is set such that the rear-end inner diameter is the same as the outer diameter of the cylindrical rear fan grille 4. At the interface of the first middle fan cover 31 and the second middle fan cover 32, there are corresponding mortise holes and tenon structures for connection and fixation. In the middle of the inner wall of the first middle fan cover 31, there is a shaft hole 301. Beside the shaft hole 301 in the middle of the inner wall of the first middle fan cover 31, there is a mounting screw hole for fixing the swing motor mounting seat 706. On the outer edge of the swing gear 704 with an inner shaft hole, there is a rotating gear 707 that mates with the rotating gear of the swing motor 705. The front fan grille 1, the fan blades 2, the first middle fan cover 31, the second middle fan cover 32, the rear fan grille 4, the fan motor 5, the motor cover 6, and the fan central shaft 8 are all provided with screw holes for installation and connection. During installation, the bearing 702 is tightly nested inside the inner shaft hole 301 of the bearing mounting seat 701. The lower end of the bearing fixing seat 703 is inserted into the inner hole of the bearing 702 and tightly nested. The swing gear 704 is fixedly connected to the upper end of the bearing fixing seat 703 by screws in such a way that the inner shaft holes are aligned and the rotating gear 708 is on the same side as the swing motor mounting seat 706. The upper end of the fan central shaft 8 passes through the shaft hole 301, the inner hole of the bearing fixing seat 703, and the inner shaft hole of the swing gear 704 in sequence and is then fixed and locked with a lateral screw. The swing motor 705 is fixedly installed on the motor mounting seat 706 by screws in such a way that the rotating gear of the swing motor engages with the rotating gear 707 of the swing gear 704. The fan motor 5 is placed inside the fan motor mounting seat 402 of the rear fan grille 4 and fastened with screws, and the motor cover 6 is installed on the outer side of the rear end of the fan motor 5. The fan blades 2 are fixedly installed on the rotating shaft at the front end of the fan motor 5. The first middle fan cover 31 and the second middle fan cover 32 are fastened and connected by the mortise holes and tenon structures to form a circular middle fan cover 3. The rear fan grille 4 with the fan motor 5 and the fan blades 2 installed is placed inside the rear end of the ring of the middle fan cover 3 and fixed with screws. Then, the circular duct 101 of the front fan grille is extended into the front end of the ring of the middle fan cover 3 and fixed with screws.In terms of effects, it is mainly reflected in that the head shaking mechanism is built into the middle cover of the fan, making the center of gravity of the fan more stable. When the fan performs the head shaking operation, the load on the motor is reduced and it is more stable and quiet. The head shaking device is not visible on the appearance, making it more simple and beautiful. At the same time, since the inner diameter of the circular cylinder of the rear grille 4 of the fan is larger than the inner diameter of the circular air duct 101 of the front grille 1 of the fan, the air inlet surface of the fan is larger than the air outlet surface. When the fan is blowing air, the ribs of the front air outlet grille of the fan are arranged clockwise, which is beneficial for the fan to output wind axially during operation. The ribs of the rear air inlet grille of the fan are arranged counterclockwise, which is beneficial for the air to flow in axially during the fan's operation, making the air inlet and outlet smoother; the fan motor mounting seat is set on the ribs of the rear grille 4 of the fan, reducing the number of brackets of the motor mounting seat. This not only enhances the working stress of the motor seat, effectively reduces the wind resistance and reduces the noise during the fan's operation, but also is beneficial for the delivery of wind force, making the blown air flow more powerful.,

[0022] The above shows and describes 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 by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed.,

Claims

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

2. A circulation fan according to claim 1, characterized in that: The shape and size of the fan motor mounting seat (402) match the fan motor (5).

3. A circulation fan according to claim 1, characterized in that: The inner diameter of the cylindrical fan rear mesh cover (4) is greater than the inner diameter of the circular air duct (101) of the fan front mesh cover (1).

4. A circulation fan according to claim 1, characterized in that: The inner diameter of the circular ring formed by the symmetrical fan cover 1 (31) and the second fan cover (32) is set so that the inner diameter at the front end is the same as the outer diameter of the circular air duct (101) of the fan front mesh cover (1); the inner diameter of the circular ring formed by the symmetrical fan cover 1 (31) and the second fan cover (32) is set so that the inner diameter at the rear end is the same as the outer diameter of the cylindrical fan rear mesh cover (4).

5. A circulation fan according to claim 1, characterized in that: The interfaces of the fan middle cover 1 (31) and the fan middle cover 2 (32) are respectively provided with mortise and tenon structures for connection and fixing.

6. A circulation fan according to claim 1, characterized in that: The diameter of the inner shaft hole of the bearing mounting seat (701) is the same as the outer diameter of the bearing (702) and they are tightly matched; the outer diameter of the lower end circle of the bearing fixing seat (703) is the same as the inner hole diameter of the bearing (702) and they are tightly matched; the inner hole diameter of the bearing fixing seat (703) is the same as the outer diameter of the fan central axis (8) and they are tightly matched.

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