Cooling and circulating dual-purpose fan

Abstract

The utility model discloses a cooling and circulating dual-purpose fan which is characterized by comprising an air duct, fan blades, a first front net, a second front net and a direct current motor. The direct current motor can rotate in the forward direction or the reverse direction. The air duct comprises an inner side wall, a first air outlet and a second air outlet. The area of the first air outlet is larger than that of the second air outlet. The inner side wall is gradually narrowed in the direction from the first air outlet to the second air outlet. The fan blades are arranged on the first air outlet side. The first front net comprises first grid bars. And the second front net comprises second grid bars. And the first grid bar and the axial direction of the direct current motor form a certain angle which is inclined outwards. And the second grid bar and the axial direction of the direct current motor form a certain angle which is inclined inwards. The cooling and circulating dual-purpose fan has two working modes of cooling and circulating. When a user uses the device, the two modes can be freely switched according to different use requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of electric fans, and specifically to the structure of electric fans. Background Art

[0002] Electric fans can be classified into table fans, floor fans, circulation fans, etc. according to the usage scenarios. The traditional floor fan is characterized by a large blowing area, but at the same time has the characteristic of a short air supply distance. Similar to the floor fan, the traditional circulation fan has the characteristic of a long air supply distance while having a small blowing area. Due to the short air supply distance of the traditional floor fan, if it is used for air circulation purposes, its effect will be greatly reduced compared with the circulation fan. Similarly, due to the small blowing area of the traditional circulation fan, if it is used for summer cooling, its effect will also be greatly reduced compared with the floor fan. Therefore, both the floor fan and the circulation fan have their own characteristics and cannot replace each other. Summary of the Invention

[0003] The technical problem to be solved by the utility model is to combine the characteristics of the floor fan and the circulation fan and design a dual-purpose cooling and circulation fan with a large blowing area and a long air supply distance.

[0004] To solve the above technical problem, the utility model provides a dual-purpose cooling and circulation fan, which includes an air duct, a fan blade, a first front net, a second front net and a DC motor. The DC motor can rotate forward or backward. The air duct includes an inner side wall, a first air outlet and a second air outlet.

[0005] The area of the first air outlet is larger than the area of the second air outlet.

[0006] Preferably, when the area of the first air outlet is 135% of the area of the first air outlet, the balance point of the air supply distance and the air volume optimization in the circulation mode can be achieved, and at the same time, there is a significant improvement effect on expanding the air supply area in the cooling mode.

[0007] The inner side wall gradually narrows from the first air outlet to the second air outlet.

[0008] Preferably, when the radian of the inner side wall is 0.21, the ideal air expansion effect and air gathering effect can be achieved simultaneously.

[0009] The fan blade includes blades. The fan blade is arranged on the side of the first air outlet. The first front net includes first grid bars. The second front net includes second grid bars. The blades include a blade basin and a blade back. The shapes of the blade basin and the blade back are concave curved surfaces.

[0010] The first grid bars form an outward inclined angle with the axial direction of the DC motor.

[0011] Preferably, when the angle of the first grid bar inclined outward is set to 4°, the balance point of optimizing the air supply area and the air supply distance can be achieved.

[0012] The second grid bar forms an angle inclined inward with the axial direction of the DC motor.

[0013] Preferably, when the angle of the second grid bar inclined inward is set to 2.5°, the balance point of optimizing the air supply distance and the air volume can be achieved.

[0014] The beneficial effects of the present utility model: The cooling and circulation dual-purpose fan of the present application has two working modes: cooling and circulation. In the first working mode, the blowing area of the fan is large, but the air supply distance is slightly short. In the second working mode, the air supply distance of the fan is far, but the blowing area is slightly small. When the user uses it, these two modes can be freely switched according to different usage requirements. Description of the Drawings

[0015] Figure 1 is a schematic cross-sectional view of the fan head of the present utility model.

[0016] Figure 2 is a schematic structural view of the fan blade of the present utility model.

[0017] Figure 3 is a schematic cross-sectional view of the first grid bar of the present utility model.

[0018] Figure 4 is a schematic cross-sectional view of the second grid bar of the present utility model.

[0019] Explanation of the reference numerals in the drawings: 1, air duct; 11, inner side wall; 12, first air outlet; 13, second air outlet; 2, fan blade; 21, blade; 211, blade basin; 212, blade back; 3, first front net; 31, first grid bar; 4, second front net; 41, second grid bar; 5, DC motor; 51, axial direction. Detailed Embodiments

[0020] The present utility model will be further described below in conjunction with the drawings and specific embodiments, so that those skilled in the art can better understand the present utility model and be able to implement it, but the embodiments cited do not limit the present utility model.

[0021] In the description of the present utility model, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality of" is at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0023] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0024] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0025] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0026] Referring to Figures 1 to 4 As shown, an embodiment of the dual-purpose cooling and circulating fan of the present utility model includes an air duct 1, a fan blade 2, a first front net 3, a second front net 4 and a DC motor 5.

[0027] The DC motor 5 can rotate forward or backward. When the fan operates in the cooling mode, the DC motor 5 drives the fan blade 2 to rotate forward. When the fan operates in the circulating mode, the DC motor 5 drives the fan blade 2 to rotate backward.

[0028] The air duct 1 includes an inner side wall 11, a first air outlet 12 and a second air outlet 13. The area of the first air outlet 12 is larger than the area of the second air outlet 13. When the area of the first air outlet is 135% of the area of the first air outlet, the balance point of the air supply distance and air volume optimization in the circulating mode can be achieved, and at the same time, there is a significant improvement effect on expanding the air supply area in the cooling mode.

[0029] The inner side wall 11 gradually narrows from the first air outlet 12 to the second air outlet 13. When the radian of the inner side wall 11 is 0.21, the ideal air expansion effect and air gathering effect can be achieved in the two working modes.

[0030] The fan blade 2 is disposed at the first air outlet 12. The fan blade 2 includes blades 21. The blades 21 include a blade bowl 211 and a blade back 212. The shapes of the blade bowl 211 and the blade back 212 are concave curved surfaces.

[0031] The first front net 3 includes first grid bars 31. The second front net 4 includes second grid bars 41. The first grid bars 31 and the axis 51 of the DC motor 5 form an outward inclined angle. When the outward inclined angle of the first grid bars 31 is set to 4°, the balance point of the air supply area and air supply distance optimization can be achieved. The second grid bars 41 and the axis 51 of the DC motor 5 form an inward inclined angle. When the inward inclined angle of the second grid bars 41 is set to 2.5°, the balance point of the air supply distance and air volume optimization can be achieved.

[0032] The above-described embodiments are merely preferred embodiments given to fully illustrate the present utility model, and the protection scope of the present utility model is not limited thereto. Equivalent substitutions or transformations made by those skilled in the art in the technical field of the present utility model on the basis of the present utility model are all within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the claims.

Claims

1. A fan for cooling and circulation, characterized in that: The invention comprises an air duct (1), a fan blade (2), a first front net (3), a second front net (4) and a direct current motor (5); the direct current motor (5) can rotate in a forward or reverse direction; the air duct (1) comprises an inner side wall (11), a first air outlet (12) and a second air outlet (13); the area of ​​the first air outlet (12) is larger than the area of ​​the second air outlet (13); the inner side wall (11) gradually narrows in a direction from the first air outlet (12) to the second air outlet (13); the fan blade (2) comprises a blade (21); the fan blade (2) is arranged on the side of the first air outlet (12); the first front net (3) comprises a first grid bar (31); the second front net (4) comprises a second grid bar (41).

2. The fan for cooling off and circulating air according to claim 1, characterized in that: The blade (21) comprises a blade basin (211) and a blade back (212); the blade basin (211) and the blade back (212) are in the shape of concave curved surfaces.

3. The fan for cooling off and circulating air according to claim 1, characterized in that: The first grid bars (31) and the axial direction (51) of the DC motor (5) form an outwardly inclined angle.

4. The fan for cooling off and circulating air according to claim 1, characterized in that: The second grid bars (41) and the axial direction (51) of the DC motor (5) form an inwardly inclined angle.

Images