EC outer rotor axial flow centrifugal fan

Abstract

The utility model provides a kind of EC outer rotor axial flow centrifugal fan, belong to fan technical field.It solves the impeller assembly of existing EC centrifugal fan is usually integrated structure, after long time work, impurity is accumulated in impeller assembly, it is not convenient to clean and maintain internal structure such as blade, affect use problem.This EC outer rotor axial flow centrifugal fan, including the impeller assembly being set in fan, impeller assembly includes impeller seat and the impeller cover being detachably connected on impeller seat, the shaft seat with shaft hole is in the middle of impeller seat, the shaft seat is distributed with several blades along its peripheral wall annularly, the back of impeller seat has several convex seats, the front of impeller seat is provided with the clamping hole being opened to convex seat direction, the clamping portion with several clamping into clamping hole is on impeller cover, between convex seat and clamping portion is connected by bolt passing through guide portion.The utility model has the advantages that impeller assembly is convenient to disassemble and assemble, cooperation is stable and it is convenient to clean and maintain inside impeller assembly.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and relates to a centrifugal fan, and particularly to an EC external rotor axial flow centrifugal fan. Background Technology

[0002] Currently, the impeller assembly in EC centrifugal fans is usually a single unit. After long-term operation, impurities accumulate inside the impeller assembly, making it inconvenient to clean and maintain the internal structure such as the blades, which affects its use. Summary of the Invention

[0003] The purpose of this invention is to address the aforementioned problems in the existing technology by providing an EC external rotor axial flow centrifugal fan to solve these problems.

[0004] The objective of this utility model can be achieved through the following technical solution: An EC external rotor axial flow centrifugal fan, comprising an impeller assembly disposed within the fan, characterized in that the impeller assembly includes an impeller seat and an impeller cover detachably connected to the impeller seat, the impeller seat having a shaft seat with a shaft hole in the middle, a plurality of blades being circumferentially distributed along the circumferential wall of the shaft seat, a plurality of protrusions on the back of the impeller seat, and a snap-fit ​​hole being opened on the front of the impeller seat facing the protrusions, the impeller cover having a plurality of snap-fit ​​parts that snap into the snap-fit ​​holes, a guide part integrally formed in the snap-fit ​​hole, and a guide groove extending into the guide part on the snap-fit ​​part, the protrusions and the snap-fit ​​parts being connected by bolts passing through the guide parts.

[0005] In the aforementioned EC external rotor axial centrifugal fan, the blades have an arc-shaped fan structure.

[0006] Compared with existing technologies, this EC external rotor axial centrifugal fan has the advantages of easy disassembly and assembly of the impeller assembly, stable fit, and convenient internal cleaning and maintenance of the impeller assembly. Attached Figure Description

[0007] Figure 1 This is a front perspective view of the EC external rotor axial centrifugal fan.

[0008] Figure 2 This is a 3D view of the back of the EC external rotor axial centrifugal fan.

[0009] Figure 3 This is a 3D view of the EC external rotor axial flow centrifugal fan with the impeller cover removed.

[0010] Figure 4 This is a partial sectional view of the EC external rotor axial flow centrifugal fan.

[0011] In the diagram, 1 is the impeller seat; 2 is the impeller cover; 3 is the shaft seat; 4 is the blade; 5 is the protrusion seat; 6 is the snap-fit ​​hole; 7 is the snap-fit ​​part; 8 is the guide part; and 9 is the bolt. Detailed Implementation

[0012] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0013] like Figure 1 As shown, this EC external rotor axial flow centrifugal fan includes an impeller assembly disposed within the fan. The impeller assembly includes an impeller seat 1 and an impeller cover 2 detachably connected to the impeller seat 1. The impeller seat 1 has a shaft seat 3 with a shaft hole in its center, which is connected to the drive unit of the fan. Several blades 4 are circumferentially distributed on the shaft seat 3 along its peripheral wall. Several protrusions 5 are provided on the back of the impeller seat 1. The front of the impeller seat 1 has snap-fit ​​holes 6 facing the protrusions 5. The impeller cover 2 has several snap-fit ​​parts 7 that snap into the snap-fit ​​holes 6. The hole 6 has an integrally formed guide part 8, and the snap-fit ​​part 7 has a guide groove that extends into the guide part 8. The protrusion 5 and the snap-fit ​​part 7 are connected by a bolt 9 passing through the guide part 8. In order to improve the installation stability and installation convenience between the impeller cover 2 and the impeller seat 1, the snap-fit ​​hole 6 and the snap-fit ​​part 7 are set to achieve a snap-fit ​​connection, so that the two are positioned and connected when the bolt 9 is installed to prevent installation misalignment. Then, the bolt 9 is used to fix it. When it is necessary to clean and maintain the blade 4, the bolt 9 is removed and the impeller cover 2 is disassembled.

[0014] In this structure, the guide part 8 and the guide groove improve the snap-fit ​​stability of the snap-fit ​​part 7 and prevent the snap-fit ​​part 7 from wobbling left and right.

[0015] Preferably, blade 4 has an arc-shaped fan-shaped structure.

[0016] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0017] Although this document frequently uses terms such as impeller seat 1, impeller cover 2, shaft seat 3, blade 4, protrusion seat 5, snap-fit ​​hole 6, snap-fit ​​part 7, guide part 8, and bolt 9, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

Claims

1. An EC external rotor axial flow centrifugal fan, comprising an impeller assembly disposed within the fan, characterized in that, The impeller assembly includes an impeller seat (1) and an impeller cover (2) detachably connected to the impeller seat (1). The impeller seat (1) has a shaft seat (3) with a shaft hole in the middle. Several blades (4) are distributed circumferentially along the circumferential wall of the shaft seat (3). The back of the impeller seat (1) has several protrusions (5). The front of the impeller seat (1) is provided with a snap-fit ​​hole (6) facing the protrusion (5). The impeller cover (2) has several snap-fit ​​parts (7) that snap into the snap-fit ​​holes (6). A guide part (8) is integrally formed in the snap-fit ​​hole (6). The snap-fit ​​part (7) has a guide groove that extends into the guide part (8). The protrusions (5) and the snap-fit ​​parts (7) are connected by bolts (9) passing through the guide part (8).

2. The EC external rotor axial centrifugal fan according to claim 1, characterized in that, The blade (4) has an arc-shaped fan-shaped structure.

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