Novel pipeline fan

Abstract

The utility model provides a novel pipeline fan, and belongs to the technical field of fans. The problem that external impurities easily enter an air inlet of an existing pipeline fan is solved. The novel pipeline fan comprises a machine shell with an air inlet, a boss protruding outwards in the axial direction is arranged in the middle of the machine shell, a positioning frame is arranged on the boss in a positioning mode, a grid disc is integrally connected to the middle of the positioning frame, a plurality of connecting feet fixedly connected with the machine shell are formed on the periphery of the positioning frame, and the connecting feet and the machine shell are fixed through screws. The fan has the advantages that impurities are prevented from entering the fan, and the using effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, relates to a duct fan, and particularly relates to a new type of duct fan. Background Art

[0002] The middle part of the casing of the duct fan has an air inlet. In actual use, when the duct fan is used in a harsh environment, foreign impurities are likely to enter through the open air inlet, and the open air inlet is also relatively dangerous in public places, affecting the use situation. Summary of the Invention

[0003] The purpose of the utility model is to provide a new type of duct fan with a filter screen for the above problems existing in the prior art.

[0004] The purpose of the utility model can be achieved by the following technical solutions: A new type of duct fan includes a casing with an air inlet, and is characterized in that a boss protruding axially outwards is provided in the middle of the casing, a positioning frame is fixedly installed on the boss, a grid plate is integrally connected in the middle of the positioning frame, several connecting feet connected with the casing are formed on the periphery of the positioning frame, and the connecting feet and the casing are fixed by screws.

[0005] In the above new type of duct fan, several positioning rods are provided at the inner end of the positioning frame, and several positioning grooves for the positioning rods to extend into are provided on the boss.

[0006] In the above new type of duct fan, there are four connecting feet.

[0007] Compared with the prior art, the new type of duct fan has the advantages of preventing impurities from entering the fan and improving the use effect. Brief Description of the Drawings

[0008] Figure 1 is a perspective view of the new type of duct fan.

[0009] Figure 2 is a cross-sectional view of the positioning frame and the casing.

[0010] In the figure, 1, casing; 2, boss; 3, positioning frame; 4, grid plate; 5, connecting feet; 6, screws; 7, positioning rods. Detailed Description of the Embodiments

[0011] The following are specific embodiments of the utility model in combination with the drawings, and the technical solutions of the utility model are further described, but the utility model is not limited to these embodiments.

[0012] Such as Figure 1 、 Figure 2As shown in the figure, the present new type of pipeline fan includes a casing 1 with an air inlet. In the middle of the casing 1, there is a boss 2 protruding axially outward. A positioning frame 3 is fixedly installed on the boss 2. In the middle of the positioning frame 3, a grid plate 4 is integrally connected. The internal structure is separated from the external filter through the grid plate 4. Several connecting feet 5 that are fixedly connected to the casing 1 are formed on the periphery of the positioning frame 3. The connecting feet 5 and the casing 1 are fixed by screws 6. The whole positioning frame 3 is sleeved on the boss 2 and is connected to the casing 1 by screws 6 through multiple connecting feet 5, which is convenient for later disassembly and extraction.

[0013] Further elaborating, the inner end of the positioning frame 3 has several positioning rods 7 that are separated and arranged. Positioning grooves for the positioning rods 7 to extend into are opened on the boss 2, which has the effect of radially limiting the positioning frame 3.

[0014] Preferably, there are four connecting feet 5.

[0015] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

[0016] Although terms such as casing 1, boss 2, positioning frame 3, grid plate 4, connecting feet 5, screws 6, positioning rods 7, etc. are used more in this article, the possibility of using other terms is not excluded. Using these terms is only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional limitation is contrary to the spirit of the present invention.

Claims

1. A novel duct fan, comprising a casing (1) having an air inlet, characterized in that: The casing (1) has a boss (2) protruding axially outward in the middle, a positioning frame (3) is positioned on the boss (2), a grid plate (4) is integrally connected to the middle of the positioning frame (3), a plurality of connecting feet (5) fixedly connected to the casing (1) are formed around the periphery of the positioning frame (3), and the connecting feet (5) are fixed to the casing (1) by screws (6).

2. A novel duct fan according to claim 1, characterized in that: The inner end of the positioning frame (3) is provided with a plurality of positioning rods (7) arranged in a spaced relationship, and the boss (2) is provided with a plurality of positioning grooves for the positioning rods (7) to extend into.

3. A novel duct fan according to claim 1, characterized in that: The connecting pins (5) are provided with four.

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