Ventilation fan structure

Abstract

The utility model relates to the technical field of ventilation fans, in particular to a ventilation fan structure. The ventilation fan structure comprises a motor, a blade assembly and a frame assembly. The frame assembly comprises a cylindrical air guide barrel, and the air inlet end and the air outlet end of the air guide barrel are each fixedly provided with a net cover. The motor is fixed on the inner side of the mesh enclosure at the air inlet end of the air duct; the blade assembly comprises a mounting disc and blades fixedly connected with the mounting disc, and the mounting disc is fixedly connected with a rotary output shaft of the motor; the motor rotates, so that the air flowing direction is the direction from the air inlet end of the air guide cylinder to the air outlet end of the air guide cylinder; a through side air inlet hole is formed in the side wall of the air guide cylinder, and a front gap exists between the blade and the plane where the point, closest to the blade, of the side air inlet hole is located. According to the utility model, the air inlet area of the air duct can be increased, so that the ventilation effect is improved.

Description

Technical Field

[0001] This utility model relates to the field of ventilation fan technology, and in particular to ventilation fan structure. Background Technology

[0002] A traditional ventilation fan includes a motor, blade assembly, and frame assembly. The frame assembly includes a cylindrical air duct with mesh covers fixedly installed at both the inlet and outlet ends. The motor is fixed inside the mesh cover at the inlet end of the air duct. The blade assembly includes a mounting plate and blades fixedly connected to the mounting plate, which is also fixedly connected to the motor's rotating output shaft. The motor's rotation causes the airflow to point from the inlet end of the air duct to the outlet end. The motor and electrical control device reduce the air inlet area of ​​the air duct, meaning the inner cavity area at the inlet end is smaller than the inner cavity area at the outlet end, allowing for further improvement in the ventilation effect of the traditional ventilation fan. Utility Model Content

[0003] One objective of this invention is to solve or alleviate the aforementioned technical problems.

[0004] The present invention employs a ventilation fan structure, comprising a motor, a blade assembly, and a frame assembly. The frame assembly includes a cylindrical air guide duct, with a mesh cover fixedly installed at both the air inlet and outlet ends. The motor is fixed inside the mesh cover at the air inlet end of the air guide duct. The blade assembly includes a mounting plate and blades fixedly connected to the mounting plate, with the mounting plate fixedly connected to the rotating output shaft of the motor. The rotation of the motor causes the airflow direction to be from the air inlet end of the air guide duct to the air outlet end. A through side air inlet hole is provided on the side wall of the air guide duct, and there is a front gap between the blades and the plane containing the point closest to the side air inlet hole.

[0005] The effect achieved by this invention is to increase the air intake area of ​​the air duct, thereby improving the ventilation effect.

[0006] A further technical solution is that, when viewed from the front, the side air inlet is semi-elliptical, and the major axis and minor axis of the side air inlet face backward.

[0007] This technical solution can ensure wind pressure during blade rotation, thereby improving ventilation efficiency.

[0008] A further technical solution involves multiple side air inlets that are evenly distributed around the motor shaft.

[0009] A further technical solution involves multiple rows of side air inlets evenly distributed along the motor shaft.

[0010] A further technical solution is that a guide body is fixedly installed on the side wall of the air duct, and the guide body is installed along the front edge of the side air inlet hole, so that the side where the long axis or short axis of the side air inlet hole is located and the front end of the air duct form a side air guide hole, and the plane where the side air guide hole is located is perpendicular to the motor shaft of the motor.

[0011] This technical solution increases the air intake area of ​​the air duct while allowing more air to flow from the front of the blades to the rear of the blades, thus improving ventilation.

[0012] In a further technical solution, the inner cavity and outer wall of the air guide are both part of the same ellipsoid.

[0013] This technical solution ensures effective side air intake while improving safety.

[0014] A further technical solution is to fix an electrical control device electrically connected to the motor on the outside of the mesh cover at the air inlet end of the air guide. Attached Figure Description

[0015] Figure 1 This is a three-dimensional schematic diagram of the ventilation fan structure according to an embodiment of the present invention. Figure 1 .

[0016] Figure 2 This is a three-dimensional schematic diagram of the ventilation fan structure according to an embodiment of the present invention. Figure 2 .

[0017] Figure 3 This is a three-dimensional exploded view of the ventilation fan structure according to an embodiment of the present invention.

[0018] Figure 4 This is a half-sectional schematic diagram of the ventilation fan structure according to an embodiment of the present utility model; Arrow 1 ARR1 indicates the air intake direction from the air inlet end of the air guide duct 31; Arrow 2 ARR2 indicates the air intake direction from the side of the air guide duct 31; Arrow 3 ARR3 indicates the air outlet direction from the air outlet end of the air guide duct 31; Line 1 indicates the plane where the point of the side air inlet 311 closest to the blade 21 is located.

[0019] Figure 5 This is a schematic diagram of DTL1 in detail one.

[0020] Figure 6 This is a schematic diagram of detail two, DTL2; arrow three, ARR3, indicates the airflow direction from one end of the air duct 31.

[0021] The accompanying drawings in the specification that best illustrate the technical features of this utility model are: Figure 4 .

[0022] Arrow 1 ARR1; Arrow 2 ARR2; Arrow 3 ARR3; Detail 1 DTL1; Detail 2 DTL2; Line 1 LINE1; Motor 1; Electrical control device 11; Blade assembly 2; Blade 21; Mounting plate 29; Frame assembly 3; Air duct 31; Side air inlet 311; Air guide body 312; Mesh cover mounting buckle 319; Front clearance 32; Mesh cover 38; Support foot 39. Detailed Implementation

[0023] The specific embodiments of this utility model will now be described with reference to the accompanying drawings.

[0024] As a specific embodiment, the ventilation fan structure of this utility model includes a motor 1, a blade assembly 2, and a frame assembly 3.

[0025] The frame assembly 3 includes a cylindrical air guide duct 31. Both the air inlet and outlet ends of the air guide duct 31 are fixedly equipped with mesh covers 38. For example, the mesh covers 38 are fixed to both ends of the air guide duct 31 by mesh cover mounting buckles 319 provided on the air guide duct 31. It is easy to understand that the mesh cover 38 has through holes (not shown in the attached diagram), so air can pass through the mesh cover 38 to form a blowing airflow. Typically, the air guide duct 31 is equipped with support feet 39.

[0026] The motor 1 is fixed inside the mesh cover 38 at the air inlet end of the air duct 31. An electrical control device 11, electrically connected to the motor 1, is fixed to the outside of the mesh cover 38 at the air inlet end of the air duct 31, for example, by screws. The electrical control device 11 is prior art; it is used to provide electrical energy to the motor 1 and control the motor 1's opening, closing, and rotation speed. Typically, the electrical control device 11 has a built-in secondary battery or is connected by wires to supply power to the motor 1.

[0027] The blade assembly 2 includes a mounting plate 29 and blades 21 fixedly connected to the mounting plate 29. The mounting plate 29 is fixedly connected to the rotary output shaft of the motor 1 (not shown in the attached diagram). It is easy to understand that the blades 21 have an angle. The rotation of the rotary output shaft of the motor 1 drives the mounting plate 29 and the blades 21 to rotate. The blades 21 push air to generate a blowing effect, achieving air intake from the air inlet end of the air guide duct 31 and air outlet from the air outlet end of the air guide duct 31; that is, the rotation of the motor 1 causes the airflow direction to be from the air inlet end of the air guide duct 31 to the air outlet end of the air guide duct 31.

[0028] The side wall of the air duct 31 has a through side air inlet 311, and there is a front gap 32 between the blade 21 and the plane containing the point of the side air inlet 311 closest to the blade 21. It is easy to understand that, for the embodiment with multiple rows of side air inlets 311 described later, the point of the side air inlet 311 closest to the blade 21 refers to the point of the row of side air inlets 311 closest to the blade 21.

[0029] like Figure 4 As shown, after motor 1 is turned on, the rotation of motor 1 causes the airflow direction to be from the air inlet end of the air duct 31 to the air outlet end of the air duct 31. As described in the background art, during the air intake process from the air inlet end of the air duct 31, the presence of motor 1 reduces the air intake area (it is easy to understand that for embodiments with electronic control device 11, electronic control device 11 also reduces the air intake area). However, since the side wall of the air duct 31 has a through side air inlet hole 311, and there is a front gap 32 between the blade 21 and the plane where the point closest to the blade 21 of the side air inlet hole 311 is located, as... Figure 4 As shown by arrow 3ARR3, air enters the air guide body 312 on the front side of the blade 21 through the side air inlet 311, and is driven by the blade 21 to exit from the air outlet of the air guide 31. In summary, compared with the prior art, this utility model can increase the air inlet area of ​​the air guide 31, thereby improving the ventilation effect, under the premise that the inner cavity area and overall shape of the air guide 31 at the outlet end are fixed (the prior art and this utility model are basically the same in terms of the inner cavity area and overall shape of the air guide 31 at the outlet end).

[0030] As one specific implementation, when viewed from the front, the side air inlet 311 is semi-elliptical (the shape formed by bisecting the ellipse in half by its major or minor axis). That is, the shape of the side air inlet 311 is the shape formed by the projection of a semi-ellipse onto the side air inlet 311, with the major and minor axes of the side air inlet 311 facing rearwards. The area of ​​the side air inlet 311 gradually decreases from front to back (from the front of blade 21 to the rear of blade 21), which ensures sufficient air pressure during blade 21 rotation and improves ventilation.

[0031] As one specific implementation method, there are multiple side air inlets 311, which are evenly distributed around the motor shaft of motor 1 (not shown in the attached figure).

[0032] As one specific implementation method, the side air inlets 311 are in multiple rows (a row of side air inlets 311 are evenly distributed around the motor shaft of the motor 1) and are evenly distributed along the motor shaft of the motor 1.

[0033] like Figure 4As shown, in one specific embodiment, a guide body 312 is fixedly installed on the side wall of the air duct 31. The guide body 312 is arranged along the front edge of the side air inlet 311, such that the side containing the major or minor axis of the side air inlet 311 and the front end of the air duct 31 together form a side air guide hole (not shown in the figure). The plane containing the side air guide hole is perpendicular to the motor shaft of the motor 1. The airflow from the side air inlet 311 flows in the direction of the debris, thereby increasing the air intake area of ​​the air duct 31 and allowing more air to flow from the front of the blade 21 to the rear of the blade 21, thus improving the ventilation effect.

[0034] As one specific implementation method, the inner cavity and outer wall of the air guide 312 are both part of the same ellipsoid (the shape formed by rotating an ellipse around its major or minor axis). While ensuring the side air intake effect, the outer wall of the air guide 312 has no sharp edges and is not easy to cause injury, which helps to improve safety.

[0035] The terms used in this invention, such as "first," "second," etc., do not indicate any order, quantity, or importance, but are merely for distinction.

[0036] In this invention, terms such as "a" or "an" are used to indicate not a limitation on the quantity, but rather to indicate the existence of at least one of the mentioned objects.

[0037] In this utility model, terms indicating direction or location such as top, bottom, side, longitudinal, transverse, middle, center, outside, inside, horizontal, vertical, left, right, above, and below are used to indicate relative positions rather than absolute positions.

[0038] Terms used in this invention, such as "approximately," "generally," "approximately," and "similar," are limiting terms used to indicate features that are present but allow for certain deviations. The amount of deviation allowed may vary depending on the specific context; for example, regarding dimensional deviations, the specific context may include, but is not limited to, relevant standards for dimensional tolerances.

Claims

1. A ventilation fan structure, comprising a motor (1), a blade assembly (2), and a frame assembly (3); the frame assembly (3) comprises a cylindrical air guide tube (31), with a mesh cover (38) fixedly installed at both the air inlet and air outlet ends of the air guide tube (31); the motor (1) is fixed inside the mesh cover (38) at the air inlet end of the air guide tube (31); the blade assembly (2) comprises a mounting plate (29) and blades (21) fixedly connected to the mounting plate (29), the mounting plate (29) being fixedly connected to the rotating output shaft of the motor (1); the rotation of the motor (1) causes the airflow direction to be from the air inlet end of the air guide tube (31) to the air outlet end of the air guide tube (31); Its characteristics are, The side wall of the air duct (31) is provided with a through side air inlet (311), and there is a front gap (32) between the blade (21) and the plane of the side air inlet (311) closest to the blade (21).

2. The ventilation fan structure according to claim 1, characterized in that, When viewed from the front, the side air inlet (311) is semi-elliptical, and the major axis and minor axis of the side air inlet (311) face backward.

3. The ventilation fan structure according to claim 2, characterized in that, There are multiple side air inlets (311) and they are evenly distributed around the motor shaft of the motor (1).

4. The ventilation fan structure according to claim 3, characterized in that, The side air inlets (311) are arranged in multiple rows and are evenly distributed along the motor shaft of the motor (1).

5. The ventilation fan structure according to claim 4, characterized in that, A guide body (312) is fixedly installed on the side wall of the air duct (31). The guide body (312) is installed along the front edge of the side air inlet (311), so that the side where the long axis or short axis of the side air inlet (311) is located and the front end of the air duct (31) form a side air guide hole. The plane where the side air guide hole is located is perpendicular to the motor shaft of the motor (1).

6. The ventilation fan structure according to claim 5, characterized in that, The inner cavity and outer wall of the air guide (312) are both part of the same ellipsoid.

7. The ventilation fan structure according to any one of claims 1-6, characterized in that, An electrical control device (11) that is electrically connected to the motor (1) is fixedly installed on the outside of the mesh cover (38) at the air inlet end of the air guide (312).

Images