A fan structure and axial fan device

Abstract

This utility model discloses a fan structure and an axial flow fan device. The fan structure includes: an axial flow impeller with an assembly part; an outer frame with an air delivery channel, the axial flow impeller being rotatably mounted inside the outer frame via the assembly part; the air delivery channel having an inlet side and an outlet side, the inlet side communicating with the back side of the axial flow impeller, and the outlet side communicating with the front side of the axial flow impeller; the outer peripheral wall of the outer frame having at least one guide channel, and the front side of the outer frame having a guide opening communicating with the guide channel, the guide channel communicating with the air delivery channel through the guide opening; and a motor located on the front side of the outer frame, the motor's output shaft driving the axial flow impeller to rotate. The technical solution of this utility model can supplement the air delivery channel with airflow through the guide channel and guide opening, increasing the airflow delivery volume. Without increasing the motor's output power, it can increase the airflow of the air delivery channel and improve the air delivery efficiency.

Description

Technical Field

[0001] This utility model relates to an axial flow fan device, and more particularly to a fan structure and an axial flow fan device. Background Technology

[0002] Fans are common cooling appliances in daily life. Fans are broadly classified into axial fans and centrifugal fans. Axial fans are simple in structure and low in cost. Their principle is that airflow enters from the rear of the axial fan, is accelerated, and then exits from the front. In current technology, the airflow of an axial fan is directly related to the output power of its motor; that is, higher motor output power results in faster fan speed and larger airflow, and vice versa. Therefore, most axial fans adjust their airflow by regulating the motor's output power. For some axial fans with an outer frame, the frame has an air delivery channel. During air delivery, the area around the inlet and outlet sides is under negative pressure. Because the outlet side lacks a drainage channel, it can only draw airflow from the inlet side, resulting in a lower overall airflow of the axial fan.

[0003] Therefore, it is necessary to further improve the current fan structure. Utility Model Content

[0004] To solve at least one of the above-mentioned technical problems, the main objective of this utility model is to provide a fan structure and an axial flow fan device.

[0005] To achieve the above objectives, the present invention provides a technical solution as follows: a fan structure comprising:

[0006] An axial flow fan impeller, the axial flow fan impeller having an assembly part;

[0007] The outer frame has an air supply channel, and the axial flow impeller is rotatably mounted inside the outer frame via an assembly part; the air supply channel has an air inlet side and an air outlet side, the air inlet side communicates with the back side of the axial flow impeller, the air outlet side communicates with the front side of the axial flow impeller, the outer peripheral wall of the outer frame has at least one guide channel, and the front side of the outer frame is provided with a guide opening that communicates with the guide channel, and the guide channel communicates with the air supply channel through the guide opening;

[0008] A motor is located on the front side of the outer frame, and the output shaft of the motor drives the axial flow fan to rotate.

[0009] The drainage channel has four sections, and the four drainage channels are located at the corners of the outer frame. The drainage channel is an arc-shaped groove.

[0010] The arc-shaped groove includes a first sidewall located on the front side of the outer frame, a second sidewall located on the rear side of the outer frame, and an arched bottom wall located between the first sidewall and the second sidewall. The first sidewall, the second sidewall, and the arched bottom wall constitute the arc-shaped groove.

[0011] The depth of the arc-shaped groove decreases sequentially from the middle groove opening to the two end groove openings, and the two end groove openings of the arc-shaped groove extend to the midpoint of the long side and the wide side of the outer frame, respectively.

[0012] Wherein, the drainage opening is an arc-shaped opening, or

[0013] Multiple gaps forming an arc shape.

[0014] The drainage opening is located on the outer peripheral wall of the outer frame and near the front side of the outer frame.

[0015] The outer frame has multiple support arms on the inner wall of the air supply channel. The multiple support arms are connected to form a mounting part for mounting a motor. The mounting part has a mounting column on the side facing the axial flow impeller, and the mounting column can be fitted with the axial flow impeller.

[0016] The fan structure also includes a protective front cover and a protective rear cover. The protective front cover is fixed to the front side of the outer frame, and the protective rear cover is fixed to the rear side of the outer frame.

[0017] To achieve the above objectives, another technical solution adopted by this utility model is to provide an axial flow fan device, including the fan structure described above.

[0018] The technical solution of this utility model mainly includes an axial flow impeller, an outer frame, and a motor. The outer peripheral wall of the outer frame has a flow channel and a flow opening. When the motor drives the axial flow impeller to rotate, airflow enters from the rear side of the outer frame and exits from the front side. At this time, a negative pressure is formed around the front side of the outer frame. Under the action of the negative pressure, the airflow in the flow channel enters the negative pressure area at the front side of the outer frame through the flow opening, supplementing the airflow delivery volume and thus improving the air volume. Therefore, the technical solution of this utility model can supplement the airflow to the air delivery channel through the flow channel and flow opening, increasing the airflow delivery volume. Without increasing the motor output power, it can increase the airflow of the air delivery channel and improve the air delivery efficiency. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model 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 this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the overall structure of a fan structure according to an embodiment of the present invention;

[0021] Figure 2 This is an exploded structural diagram of a fan structure according to an embodiment of the present invention.

[0022] Figure 3 This is an exploded structural diagram of a fan structure according to another embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of the outer frame in a fan structure according to an embodiment of the present invention.

[0024] 100. Outer frame:

[0025] 110. First sidewall; 111. Drainage channel; 112. Drainage opening; 113. Fixing hole; 114. Bayonet; 115. Air supply channel; 116. Mounting hole; 120. Second sidewall; 130. Support arm; 140. Mounting part; 150. Arched bottom wall; 160. Mounting column.

[0026] 200. Axial flow fan:

[0027] 210. Assembly section; 220. Assembly hole 220; 230. Heat dissipation hole 230.

[0028] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0031] Unlike most axial flow fans in related technologies that increase airflow by increasing the power output of a motor, this invention provides a fan structure that, without increasing the motor's output power, enhances the airflow at the front of the outer frame by adding an airflow channel to the outer peripheral wall near the front, thereby improving airflow volume and air delivery efficiency. Please refer to the following embodiment for the specific structure of this fan.

[0032] Please refer to Figures 1 to 4 , Figure 1 This is a schematic diagram of the overall structure of a fan structure according to an embodiment of the present invention. Figure 2 This is an exploded structural diagram of a fan structure according to an embodiment of the present invention. Figure 3 This is an exploded structural diagram of a fan structure according to another embodiment of the present invention. Figure 4 This is a schematic diagram of the outer frame in a fan structure according to an embodiment of the present invention. In this embodiment, the fan structure is applied to an axial flow fan with an outer frame. The fan structure includes:

[0033] An axial flow fan 200 has an assembly portion 210. This assembly portion 210 has an assembly hole 220 through which the axial flow fan 200 can be connected to the output shaft of a motor. The back side of the axial flow fan 200 has heat dissipation holes 230.

[0034] An outer frame 100 has an air supply channel 115. The axial flow impeller 200 is rotatably mounted inside the outer frame 100 via an assembly part 210. The air supply channel 115 has an air inlet side and an air outlet side. The air inlet side communicates with the back side of the axial flow impeller 200, and the air outlet side communicates with the front side of the axial flow impeller 200. The outer peripheral wall of the outer frame 100 has at least one guide channel 111. The front side of the outer frame 100 is provided with a guide opening 112 that communicates with the guide channel 111. The guide channel 111 communicates with the air supply channel 115 through the guide opening 112. The outer frame 100 is generally rectangular or square. The air supply channel 115 is formed in the middle of the outer frame 100. The air inlet side of the air supply channel 115 is close to the back side of the axial flow impeller 200, and the air outlet side of the air supply channel 115 is close to the front side of the axial flow impeller 200. The outer peripheral wall of the outer frame 100 has a flow channel 111 and a flow opening 112. When the axial flow impeller 200 rotates, it drives the airflow to be introduced from the air inlet side of the air supply channel 115 and discharged from the air outlet side of the air supply channel 115. A negative pressure will be formed around the air outlet side of the air supply channel 115. At this time, the airflow in the flow channel 111 will flow into the air outlet side of the air supply channel 115 from the flow opening 112 under the action of the negative pressure. That is, the airflow in the flow channel 111 will supplement the front side of the outer frame 100, increasing the air volume.

[0035] A motor is located on the front side of the outer frame 100, and the output shaft of the motor drives the axial flow fan 200 to rotate. The motor is installed on the front side of the outer frame 100, and the motor can continuously drive the axial flow fan 200 to achieve air delivery.

[0036] In one specific embodiment, there are four drainage channels 111, each located at a corner of the outer frame 100. Each drainage channel 111 is an arc-shaped groove. The number of drainage channels 111 can be two or more. Considering the uniformity of the supplementary airflow from the drainage channels 111, there can be two drainage channels 111, arranged diagonally on the outer frame 100. It is understood that there can also be four drainage channels 111, each located at a corner of the outer frame 100, to further improve the uniformity of the supplementary airflow. The drainage channels 111 are located at the corners of the outer frame 100, which facilitates the utilization of the corner resources, thus providing a larger effective space for the drainage channels 111 and a greater supplementary airflow rate.

[0037] Specifically, the arc-shaped groove includes a first sidewall 110 located on the front side of the outer frame 100, a second sidewall 120 located on the rear side of the outer frame 100, and an arched bottom wall 150 located between the first sidewall 110 and the second sidewall 120. The first sidewall 110, the second sidewall 120, and the arched bottom wall 150 constitute the arc-shaped groove. The arched bottom wall 150 is adapted to the structure of the air supply channel 115, avoiding the arc-shaped groove from affecting the structural design of the air supply channel 115.

[0038] Because the outer frame 100 is designed with an air supply channel 115, the radius of which is less than half the midpoint of the side length of the outer frame 100, the depth of the arc-shaped groove decreases sequentially from the middle opening to the two ends, and the openings at both ends of the arc-shaped groove extend to the midpoints of the long and wide sides of the outer frame 100, respectively. In this embodiment, the outer frame 100 is specifically a square, and the openings at both ends of the arc-shaped groove extend to the midpoints of the two adjacent sides of the outer frame 100, to ensure that the arc-shaped groove does not affect the design of the air supply channel 115, while also allowing the arc-shaped groove to have a larger space to accommodate more air. It can be understood that when the outer frame 100 is rectangular, the depth of the opening extending towards the long side of the outer frame 100 can be increased.

[0039] In one embodiment, the drainage opening 112 is an arc-shaped opening, or

[0040] Multiple notches forming an arc shape. The shape of the drainage opening 112 is adapted to the shape of the drainage channel 111 to facilitate the uniform flow of air from the drainage channel 111 through the drainage opening 112 and into the air supply side of the air supply channel 115. When the drainage opening 112 has multiple notches, the multiple notches can be evenly arranged according to the shape of the air being guided.

[0041] In one specific embodiment, the drainage opening 112 is disposed on the outer peripheral wall of the outer frame 100 and near the front side of the outer frame 100. By providing the drainage opening 112, when the pressure on the front side of the outer frame 100 is low, airflow can be supplemented to the air supply channel 115, thereby increasing the airflow delivery volume.

[0042] In one embodiment, the inner wall of the air supply duct 115 of the outer frame 100 has multiple support arms 130. These support arms 130 are connected to form a mounting portion 140 for mounting a motor. The mounting portion 140 has a mounting post 160 on the side facing the axial flow impeller 200, and the mounting post 160 can be fitted with the axial flow impeller 200. In the above embodiment, there are four support arms 130, which are connected within the air supply duct 115 and extend towards the corner of the outer frame 100. The other ends of the four support arms 130 are connected to form the mounting portion 140, which can be used to mount a motor. The mounting post 160 of the mounting portion 140 is hollow and has a mounting hole 116 for the motor's output shaft to extend out.

[0043] In one embodiment, the fan structure further includes a protective front cover and a protective rear cover. The protective front cover is fixed to the front side of the outer frame 100, and the protective rear cover is fixed to the rear side of the outer frame 100. The outer frame 100 has fixing holes 113 for mounting the protective front cover and the protective rear cover. The outer frame 100 also has bayonets 114 for securing the protective front cover and the protective rear cover. The protective front cover protects the front side of the fan structure, and the protective rear cover protects the rear side of the fan structure, preventing objects from directly entering the fan.

[0044] In the embodiments of this utility model, the axial fan device includes the fan structure described above. The specific structure of this fan structure is described in the above embodiments and will not be repeated here. Since the axial fan device of this solution adopts all the technical solutions of all the above-described fan structure embodiments, it possesses at least all the advantages and beneficial effects brought about by the technical solutions of the above-described fan structure embodiments, which will not be repeated here.

[0045] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the technical concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A fan structure characterized by, The fan structure includes: An axial flow fan impeller, the axial flow fan impeller having an assembly part; The outer frame has an air supply channel, and the axial flow impeller is rotatably mounted inside the outer frame via a conversion part; the air supply channel has an air inlet side and an air outlet side, the air inlet side communicates with the back side of the axial flow impeller, the air outlet side communicates with the front side of the axial flow impeller, the outer peripheral wall of the outer frame has at least one guide channel, and the front side of the outer frame is provided with a guide opening that communicates with the guide channel, and the guide channel communicates with the air supply channel through the guide opening; A motor is located on the front side of the outer frame, and the output shaft of the motor drives the axial flow fan to rotate.

2. The fan structure as described in claim 1, characterized in that, There are four drainage channels, and the four drainage channels are located at the corners of the outer frame. The drainage channels are arc-shaped grooves.

3. The fan structure as described in claim 2, characterized in that, The arc-shaped groove includes a first sidewall located on the front side of the outer frame, a second sidewall located on the rear side of the outer frame, and an arched bottom wall located between the first sidewall and the second sidewall. The first sidewall, the second sidewall, and the arched bottom wall constitute the arc-shaped groove.

4. The fan structure as described in claim 3, characterized in that, The depth of the arc-shaped groove decreases sequentially from the middle groove opening to the two end groove openings, and the two end groove openings of the arc-shaped groove extend to the midpoint of the long side and the wide side of the outer frame, respectively.

5. The fan structure as described in claim 3, characterized in that, The drainage opening is an arc-shaped opening, or Multiple gaps forming an arc shape.

6. The fan structure as described in claim 1, characterized in that, The drainage opening is located on the outer peripheral wall of the outer frame and near the front side of the outer frame.

7. The fan structure as described in claim 1, characterized in that, The inner wall of the air supply channel of the outer frame has multiple support arms, which are connected to form a mounting part for mounting a motor. The mounting part has a mounting column on the side facing the axial flow impeller, and the mounting column can be fitted with the axial flow impeller.

8. The fan structure as described in claim 1, characterized in that, The fan structure also includes a protective front cover and a protective rear cover. The protective front cover is fixed to the front side of the outer frame, and the protective rear cover is fixed to the rear side of the outer frame.

9. An axial flow fan device, characterized in that, The axial fan device includes the fan structure as described in any one of claims 1 to 8.

Images