Centrifugal fan

Abstract

The utility model relates to the technical field of fans, in particular to a centrifugal fan which comprises a shell, a spacer, a fan cover, a wind wheel and a driving assembly, the shell is provided with an air outlet, the spacer is provided with an air inlet and installed in the shell, the spacer and the shell define an air guide channel communicated with the air inlet and the air outlet, and the air guide channel is communicated with the wind wheel. The fan cover is installed on the shell and provided with an air guide channel communicated with the air inlet, the wind wheel is installed in the air guide channel and arranged corresponding to the position of the fan cover, and the driving assembly is connected with the wind wheel and drives the wind wheel to rotate. According to the centrifugal fan, the mode that the fan cover is connected with the shell, and the air inducing channel communicated with the air guiding channel is arranged is adopted, so that the wind wheel in the air guiding channel can suck more air through the air inducing channel of the fan cover, the air suction effect of the centrifugal fan is improved, and the purpose of increasing the flow speed of airflow blown out by the centrifugal fan is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fans, in particular to a centrifugal fan. Background Art

[0002] A centrifugal fan is a fan device that uses centrifugal force to suck in and then discharge gas. In traditional technology, a centrifugal fan generally uses high-speed rotating blades to suck gas into the fan, and uses the centrifugal force generated by the high-speed rotation of the blades to push the air in the fan out of the fan to form a strong airflow. However, the flow rate of the air blown out by the centrifugal fan is easily affected by the volume of air sucked in at the same time. The blades are inside the fan, which makes it difficult for the centrifugal fan to quickly inhale more air. There is a technical problem that the centrifugal fan has poor gas suction effect, which affects the flow rate of the air blown out by the centrifugal fan. Utility Model Content

[0003] The purpose of the present application is to provide a centrifugal fan to solve the technical problem in the prior art that the centrifugal fan has poor gas suction effect, thereby affecting the flow rate of the air flow blown out by the centrifugal fan.

[0004] A centrifugal fan comprises: a shell, a partition, a wind cover, a wind wheel and a drive assembly, the shell is provided with an air outlet, the partition is provided with an air inlet and is installed in the shell, the partition and the shell form an air guide duct connecting the air inlet and the air outlet, the wind cover is installed on the shell and is provided with an air duct connecting the air inlet, the wind wheel is installed in the air guide duct and is arranged corresponding to the position of the wind cover, the drive assembly is connected to the wind wheel and drives the wind wheel to rotate.

[0005] In one embodiment, the air guide duct includes a vortex section and a diffuser section. The vortex section is spirally arranged and communicated with the air inlet, and the diffuser section is communicated with the air outlet.

[0006] In one embodiment, the vortex section gradually expands toward the expansion section.

[0007] In one embodiment, the expansion section gradually expands toward the air outlet.

[0008] In one embodiment, the air duct includes an air suction section, a transition section and an air induced section, the air suction section gradually shrinks toward the transition section, and the air induced section is connected to the air inlet.

[0009] In one embodiment, the air induction section gradually expands toward the air inlet.

[0010] In one embodiment, the wind wheel includes a surface frame, blades and a connecting frame. The surface frame is provided with an air suction port, and the air suction port is connected to the air duct. There are multiple blades, each of which is arranged around the air suction port and connected to the surface frame and the connecting frame. The connecting frame is connected to the drive assembly.

[0011] In one embodiment, the wind wheel further includes a flange connected to the surface frame, and the flange extends into the air inlet.

[0012] In one embodiment, the connecting frame includes a frame body and an air guide column, the frame body is connected to each of the blades, and the air guide column protrudes toward the air inlet and is connected to the driving assembly.

[0013] In one embodiment, the driving assembly includes a driving member and a connecting plate, the driving member is connected to the wind wheel, and the connecting plate is installed on the housing and connected to the driving member.

[0014] The beneficial effect of the centrifugal fan provided by the present application is that: the wind cover is connected to the shell, and an air duct connected to the air guide duct is provided, which is beneficial for the wind wheel in the air guide duct to inhale more air through the air duct of the wind cover, thereby improving the gas suction effect of the centrifugal fan and achieving the purpose of increasing the flow rate of the air flow blown out by the centrifugal fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural diagram of the centrifugal fan shown in the present invention;

[0016] Figure 2 for Figure 1 The cross-sectional structural diagram of the centrifugal fan shown;

[0017] Figure 3 for Figure 2 The schematic structural diagram of the wind wheel of the centrifugal fan shown in FIG.

[0018] The meanings of the numbers in the accompanying drawings are:

[0019] 100. Centrifugal fan;

[0020] 10. Housing; 11. Air outlet;

[0021] 20, spacer; 21, air inlet; 221, vortex section; 222, expansion section;

[0022] 30. Wind hood; 31. Air duct; 311. Air suction section; 312. Transition section; 313. Air induction section;

[0023] 40. Wind wheel; 41. Surface frame; 411. Air inlet; 42. Blades; 43. Connecting frame; 431. Frame; 432. Wind guide column; 44. Flange;

[0024] 50. Driving assembly; 51. Driving member; 52. Connecting plate. DETAILED DESCRIPTION

[0025] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation to the present invention.

[0027] 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 the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0028] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection; direct connection, or indirect connection through an intermediate medium; internal communication between two components, or interaction between two components, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0031] like Figures 1 to 2 As shown, it is the centrifugal fan 100 shown in the present invention.

[0032] like Figure 2 As shown, the centrifugal fan 100 includes: a shell 10, a spacer 20, a wind cover 30, a wind wheel 40 and a drive assembly 50, wherein the shell 10 is used to install the spacer 20, the wind cover 30 and the drive assembly 50, the spacer 20 is arranged in the shell 10, and is used to guide the gas flow in the shell 10, the wind cover 30 is connected to the shell 10, and is used to introduce air into the shell 10, the position of the wind wheel 40 corresponds to the wind cover 30, and is used to cooperate with the wind cover 30 to attract air to flow into the shell 10, and the drive assembly 50 is used to drive the wind wheel 40 to rotate. Through the cooperation between the wind wheel 40 and the wind cover 30, more air is inhaled, thereby improving the gas suction effect of the centrifugal fan 100, and achieving the purpose of increasing the flow rate of the airflow blown out by the centrifugal fan 100.

[0033] Below, combined Figures 1 to 3 , the above-mentioned centrifugal fan 100 is further described.

[0034] like Figures 1 to 2As shown, the shell 10 is provided with an air outlet 11, and the partition 20 is provided with an air inlet 21 and is installed in the shell 10. The partition 20 and the shell 10 form an air guide duct connecting the air inlet 21 and the air outlet 11, which is conducive to guiding the air out of the shell 10 through the air guide duct. Specifically, the air guide duct includes a vortex section 221 and a flow expansion section 222. The vortex section 221 is spirally arranged and connected to the air inlet 21. The vortex section 221 gradually expands toward the direction of the flow expansion section 222. The flow expansion section 222 is connected to the air outlet 11, and the flow expansion section 222 gradually expands toward the direction of the air outlet 11.

[0035] like Figure 2 As shown, the wind hood 30 is installed on the shell 10 and is provided with an air duct 31 connected to the air inlet 21. The air duct 31 includes an air suction section 311, a transition section 312 and an air duct section 313. The air suction section 311 gradually shrinks toward the transition section 312. The gradually shrinking air suction section 311 is used to accelerate the flow of air, so as to accelerate the air flow to the transition section 312 through the Coanda effect, so as to enhance the air suction effect of the wind hood 30 on gas. The air duct section 313 is connected to the air inlet 21, and the air duct section 313 gradually expands toward the air inlet 21, so that the wind wheel 40 can inhale the air in the transition section 312.

[0036] like Figures 2 to 3 As shown, the wind wheel 40 is installed in the vortex section 221 of the air guide duct and is arranged corresponding to the position of the wind cover 30. Specifically, the wind wheel 40 includes a face frame 41, blades 42 and a connecting frame 43. The face frame 41 is provided with an air suction port 411, and the air suction port 411 is communicated with the air duct 31. There are multiple blades 42, each of which is arranged around the air suction port 411 and connected to the face frame 41 and the connecting frame 43. The connecting frame 43 is connected to the driving assembly 50. Further, The wind wheel 40 also includes a flange 44 connected to the surface frame 41, and the flange 44 extends into the air inlet 21 to guide the air into between the blades 42. Furthermore, in order to facilitate the air guided into between the blades 42 to be pulled by the blades 42 into the vortex section 221 of the air guide duct, the connecting frame 43 includes a frame body 431 and an air guide column 432. The frame body 431 is connected to each of the blades 42, and the air guide column 432 protrudes toward the air inlet 411 and is connected to the drive assembly 50.

[0037] like Figure 2As shown, the driving assembly 50 is connected to the wind guide column 432 of the wind wheel 40 and drives the wind wheel 40 to rotate. Specifically, the driving assembly 50 includes a driving member 51 and a connecting plate 52. The driving member 51 is a motor and is connected to the wind wheel 40. The connecting plate 52 is installed on the shell 10 and connected to the driving member 51 to facilitate the installation of the driving assembly 50. During assembly, the wind wheel 40 is installed on the driving member 51, and then the driving member 51 is connected to the connecting plate 52. Finally, the connecting plate 52 is installed on the shell 10 to realize the connection between the driving assembly 50 and the wind wheel 40.

[0038] The working principle of the centrifugal fan 100 provided in the present application is: start the driving part 51 of the driving assembly 50, control the rotation of the wind wheel 40, use the blades 42 of the wind wheel 40 to inhale air, the air enters from the air duct 31 of the wind cover 30, and under the traction of the suction section 311 of the air duct 31, passes through the flange 44 of the wind wheel 40 and enters between the blades 42. After accelerating in the vortex section 221, it is blown out from the expansion section 222 to realize the blowing of the centrifugal fan 100.

[0039] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0040] The above-described embodiments merely represent several implementations of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A centrifugal fan, characterized in that: include: A shell, a partition, a wind cover, a wind wheel and a drive assembly, the shell is provided with an air outlet, the partition is provided with an air inlet and is installed in the shell, the partition and the shell form an air duct connecting the air inlet and the air outlet, the wind cover is installed on the shell and is provided with an air duct connecting the air inlet, the wind wheel is installed in the air duct and is arranged corresponding to the position of the wind cover, the drive assembly is connected to the wind wheel and drives the wind wheel to rotate.

2. The centrifugal fan according to claim 1, wherein: The air guide duct includes a vortex section and a flow expansion section. The vortex section is spirally arranged and communicated with the air inlet, and the flow expansion section is communicated with the air outlet.

3. The centrifugal fan according to claim 2, wherein: The vortex section gradually expands toward the expansion section.

4. The centrifugal fan according to claim 2, wherein: The flow expansion section gradually expands toward the air outlet.

5. The centrifugal fan according to claim 1, wherein: The air duct includes an air suction section, a transition section and an air induced section. The air suction section gradually shrinks toward the transition section, and the air induced section is communicated with the air inlet.

6. The centrifugal fan according to claim 5, characterized in that: The air induction section gradually expands toward the air inlet.

7. The centrifugal fan according to claim 1, wherein: The wind wheel includes a surface frame, blades and a connecting frame. The surface frame is provided with an air suction port, and the air suction port is connected to the air duct. There are multiple blades, each of which is arranged around the air suction port and connected to the surface frame and the connecting frame. The connecting frame is connected to the driving assembly.

8. The centrifugal fan according to claim 7, wherein: The wind wheel further includes a flange connected to the surface frame, and the flange extends into the air inlet.

9. The centrifugal fan according to claim 7, wherein: The connecting frame includes a frame body and an air guide column. The frame body is connected to each of the blades. The air guide column is protruded toward the air inlet and is connected to the driving assembly.

10. The centrifugal fan according to claim 1, wherein: The driving assembly includes a driving member and a connecting plate. The driving member is connected to the wind wheel. The connecting plate is installed on the housing and connected to the driving member.

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