Direct-current fan

Abstract

The utility model discloses a direct current type fan, relates to the technical field of fans, aims to solve the problem that a traditional fan is small in air pressure and air volume, and comprises a barrel-shaped outer shell, a fan body is installed inside the outer shell, an air outlet cover is installed at the top end of the outer shell, an air outlet is formed in the air outlet cover, and an air inlet is formed in the outer shell. An air inlet cover is installed at the bottom end of the outer shell, a plurality of air inlets are formed in the air inlet cover, and the air outlet cover, the outer shell and the air inlet cover are coaxially arranged.

Description

Technical Field

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

[0002] A fan is a machine that relies on input mechanical energy to increase gas pressure and discharge gas. It is a driven fluid machine. Most traditional fans are set as vortex-shaped. The air inlet is generally set on the two sides of the fan housing, and the air outlet is set on the tangent of the housing. When working, the air flow is driven by the rotation of the fan blades to achieve the purpose of blowing. The rated wind pressure that a traditional 550-watt fan can generate is 1.7KPa.

[0003] When a traditional vortex fan is working, the air needs to rotate with the fan blades, so the wind resistance it generates is relatively large, resulting in low wind pressure and air volume. Fans are also often used on stoves and burners to enhance the combustion effect by blowing air, but the wind pressure and air volume of traditional fans are relatively small, so the effect on stoves or burners is also poor, and the vortex fan is also large in size, which is more troublesome to install and fix. Utility Model Content

[0004] In order to solve the above-mentioned problem, namely, the problem that the wind pressure and air volume of traditional fans are relatively small, the utility model proposes a DC fan, which includes a cylindrical outer shell, a fan body is installed inside the outer shell, an air outlet cover is installed at the top of the outer shell, an air outlet cover is provided with an air outlet, an air inlet cover is installed at the bottom end of the outer shell, a plurality of air inlets are provided on the air inlet cover, the air outlet cover is coaxially arranged with the outer shell and the air inlet cover; an air outlet tube is coaxially arranged on the air outlet cover, the air outlet is arranged at one end of the air outlet tube away from the air outlet cover, and an external thread is provided at one end of the air outlet tube away from the air outlet cover; the diameter of the air outlet tube is set smaller than the diameter of the outer shell.

[0005] The utility model is further configured as follows: an annular mounting seat is arranged in the shell, the fan body is against the mounting seat, the other end of the fan is connected to a mounting frame, and both ends of the mounting frame are connected to the inner wall of the shell by screws.

[0006] The utility model is further configured as follows: a filter screen is embedded in the air inlet cover.

[0007] The beneficial effects of the utility model are:

[0008] 1. By arranging the air outlet cover and the air inlet cover coaxially, the air inside the fan can flow in a straight line when the fan is working, reducing the wind resistance during the air flow, thereby increasing the wind pressure and air volume of the fan.

[0009] 2. By opening an external thread on the air outlet tube, the installation and fixation of the fan can be more convenient, and the fan is set to be cylindrical, which greatly reduces the size of the fan and makes the installation and fixation of the fan simpler and more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 Shown is a schematic diagram of the structure of the utility model.

[0011] Figure 2 Shown is a front view of the present utility model.

[0012] Figure 3 A cross-sectional view of the utility model along the AA direction is shown.

[0013] Figure 4 An exploded view of the present invention is shown.

[0014] Figure 5 A partial cross-sectional view of the present invention is shown.

[0015] Figure numerals: 1, outer shell; 11, mounting seat; 12, mounting frame; 121, mounting portion; 2, fan body; 3, air outlet cover; 31, air outlet tube; 32, air outlet; 4, air inlet cover; 41, air inlet; 42, filter. DETAILED DESCRIPTION

[0016] The preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0017] The utility model provides a DC fan, which comprises a cylindrical shell 1. The shell 1 is set to be cylindrical, and both ends of the shell 1 are opened. A fan body 2 is installed in the shell 1 to drive air flow.

[0018] An air outlet cover 3 is plugged into the top end of the outer shell 1, the air outlet cover 3 is coaxially arranged with the outer shell 1, and the air outlet cover 3 and the outer shell 1 are fixed by screws, and an air outlet 32 ​​is provided on the air outlet cover 3; an air inlet cover 4 is plugged into the bottom end of the outer shell 1, a plurality of air inlet holes are evenly provided on the air inlet cover 4, and the air inlet cover 4 is also coaxially arranged with the outer shell 1, that is, the air outlet cover 3 and the air inlet cover 4 are coaxially arranged.

[0019] When the fan body 2 is working, air can be drawn into the casing 1 through the air inlet 41 and blown out through the air outlet 32. Since the air outlet cover 3 and the air inlet cover 4 are coaxially arranged, the air can flow in a straight line, thereby greatly reducing the wind resistance generated during the flow process, so as to increase the wind pressure and air volume.

[0020] An air outlet 31 is welded to the air outlet cover 3, and an air outlet 32 ​​is arranged at one end of the air outlet 31 away from the air outlet cover 3. The diameter of the air outlet 31 is smaller than the diameter of the housing 1, so that the wind pressure at the outlet can be enhanced during transmission. An external thread is provided at one end of the air outlet 31 away from the air outlet cover 3, so as to facilitate the installation of the fan on the air-using device.

[0021] A mounting seat 11 is fixedly connected inside the outer shell 1. The mounting seat 11 is arranged in a ring shape. An inner stop is arranged on the mounting seat 11. One end of the fan body 2 is against the stop of the mounting seat 11. The other end of the fan body 2 is fixedly connected to a mounting frame 12. Both ends of the mounting frame 12 are integrally provided with mounting parts 121. The mounting part 121 is arranged perpendicular to the mounting frame 12. The mounting part 121 is arranged in an arc shape that is compatible with the outer shell 1. The mounting part 121 is fixedly connected to the outer shell 1 by screws, and then under the action of the mounting seat 11 and the mounting frame 12, the fan body 2 can be stably installed in the outer shell 1.

[0022] A filter screen 42 is embedded in the air inlet cover 4 . The filter screen 42 is circular and coaxially arranged with the air inlet cover 4 . The filter screen 42 can filter the air drawn into the housing 1 to prevent impurities from entering the housing 1 .

[0023] It should be noted that the maximum wind pressure that the fan of the present application can reach is 2.2KPa, which is much better than the traditional 1.7KPa fan.

[0024] In summary, the utility model can make the air inside the fan flow along a straight line when the fan is working by coaxially arranging the air outlet cover 3 and the air inlet cover 4, reducing the wind resistance during the air flow process, thereby increasing the wind pressure and air volume of the fan. By providing an external thread on the air outlet tube 31, it is more convenient to install and fix the fan, and the fan is set in a cylindrical shape, which greatly reduces the size of the fan, making the installation and fixation of the fan simpler and more convenient.

[0025] Although the present invention has been described with reference to preferred embodiments, various modifications may be made thereto and parts thereof may be replaced with equivalents without departing from the scope of the present invention. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

[0026] In the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0027] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0028] The term "comprise" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that includes a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, article, or apparatus / device.

[0029] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A DC fan, characterized in that: The invention comprises a cylindrical shell (1), wherein a fan body (2) is installed inside the shell (1), an air outlet cover (3) is installed at the top end of the shell (1), and an air outlet (32) is provided on the air outlet cover (3), and an air inlet cover (4) is installed at the bottom end of the shell (1), and a plurality of air inlets (41) are provided on the air inlet cover (4), and the air outlet cover (3) is coaxially arranged with the shell (1) and the air inlet cover (4); an air outlet cylinder (31) is coaxially arranged on the air outlet cover (3), and the air outlet (32) is arranged at one end of the air outlet cylinder (31) away from the air outlet cover (3), and an external thread is provided on one end of the air outlet cylinder (31) away from the air outlet cover (3); the diameter of the air outlet cylinder (31) is smaller than the diameter of the shell (1).

2. The DC fan according to claim 1, characterized in that: An annular mounting seat (11) is arranged inside the housing (1), the fan body (2) abuts against the mounting seat (11), the other end of the fan is connected to a mounting frame (12), and both ends of the mounting frame (12) are connected to the inner wall of the housing (1) by means of screws.

3. The DC fan according to claim 1, characterized in that: The air inlet cover (4) is embedded with a filter screen (42).

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