Portable fan

Abstract

The utility model provides a portable fan, which relates to the technical field of household appliances and comprises a shell and a fan, a containing space is arranged in the shell, an airflow inlet and an airflow outlet are respectively arranged at a first end and a second end of the shell, the first end and the second end are opposite to each other, the airflow inlet and the airflow outlet are both communicated with the containing space, and the fan is arranged in the containing space. The fan is contained in the containing space and comprises an impeller with a plurality of fan blades, an air inlet and an air outlet, the air inlet and the air outlet are formed in the different sides of the impeller respectively, and the airflow direction of the airflow inlet and the airflow direction of the air inlet are configured to be different. Due to the fact that the airflow direction at the airflow inlet and the airflow direction at the air inlet are configured to be different, the flowing direction of air entering the fan can be suddenly changed, the sudden turning can cause disordered flowing of the air in the fan, and light foreign matter such as hair is difficult to be sucked into the fan from the airflow inlet in the disordered airflow.

Description

Technical Field

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

[0002] A fan is a common household appliance. By driving the blades to rotate through a motor, air flow is generated, so as to achieve the purposes of ventilation, cooling or promoting air circulation. The air flow generated by the rotation of the fan blades forms a low-pressure area behind the blades. At the same time, there is a relatively high pressure outside the air inlet of the fan relative to the low-pressure area. Due to the pressure difference between the inside (low-pressure area) and the outside (high-pressure area) of the fan, air flows from the high-pressure area to the low-pressure area, that is, air is inhaled from the air inlet of the fan. The inhaled air is guided and accelerated by the fan blades and finally blown out from the air outlet of the fan. When lightweight objects such as hair are located near the air inlet, due to the effect of the pressure difference, these objects will be inhaled into the fan. Lightweight objects such as hair and small foreign objects may be wound around the motor shaft or blades of the fan, resulting in motor overload or blade damage, reducing the service life of the fan. The accumulation of foreign objects may affect the balance of the fan blades, increase the burden on the motor, resulting in a decrease in the efficiency of the fan, a reduction in air volume and air pressure, and the wound hair or foreign objects may cause the fan blades to break or the motor to overheat, posing a potential safety hazard of fire. Summary of the Utility Model

[0003] The purpose of the utility model is to provide a portable fan that is not likely to inhale lightweight objects such as hair or small foreign objects.

[0004] To achieve the above object, the technical solution of the embodiment of the utility model is as follows:

[0005] A portable fan, comprising:

[0006] A housing with a storage space inside. The opposite first end and second end of the housing are respectively provided with an air flow inlet and an air flow outlet, and both the air flow inlet and the air flow outlet are communicated with the storage space;

[0007] A fan, housed in the storage space. The fan includes an impeller having a plurality of fan blades, and an air inlet and an air outlet respectively provided on different sides of the impeller;

[0008] The air flow direction at the air flow inlet is configured to be different from the air flow direction at the air inlet.

[0009] Further,

[0010] The air flow direction at the air flow inlet is perpendicular to the air flow direction at the air inlet.

[0011] Further,

[0012] A first baffle is provided at the air flow outlet. The fan is a centrifugal fan. The air flow direction at the air outlet is the same as the air flow direction at the air flow outlet. The air outlet is arranged facing the first baffle, and in the direction perpendicular to the air flow direction at the air outlet, the air outlet does not exceed the contour range of the first baffle.

[0013] Furthermore,

[0014] A fan support frame is arranged inside the housing. The centrifugal fan is installed in the housing through the fan support frame;

[0015] A second baffle is provided at the air flow inlet. The centrifugal fan is arranged facing the second baffle, and the air inlet does not exceed the contour range of the second baffle.

[0016] Furthermore,

[0017] The first end of the housing includes a flanged portion with a perforation formed in the center. The second baffle is arranged in the perforation. The second baffle and the flanged portion are connected by a plurality of ribs. The air flow inlet is formed between the outer peripheral edge of the second baffle and the inner peripheral edge of the flanged portion;

[0018] The fan does not exceed the inner contour of the air flow inlet in the direction perpendicular to the second baffle. Furthermore,

[0019] The flanged portion includes an annular horizontal portion extending inward from the outer peripheral edge of the corresponding end face, and a vertical portion extending by bending from the end of the horizontal portion;

[0020] The second baffle includes a baffle piece spaced and flush with the horizontal portion, and a guiding wall formed by bending from the outer peripheral edge of the baffle piece. The guiding wall and the vertical portion are parallel to each other and spaced apart from each other;

[0021] The projection area of the fan on the end face of the housing is located inside the area surrounded by the guiding wall.

[0022] Furthermore,

[0023] The second end of the housing includes a through opening. The first baffle is arranged in the opening. The first baffle and the housing are connected by connecting ribs;

[0024] The air flow outlet is formed between the first baffle and the housing.

[0025] Furthermore,

[0026] An inclined guiding portion is arranged on the side of the first baffle facing the storage space. The guiding portion is used to diffuse the air flow flowing out of the air outlet and guide it to the air flow outlet.

[0027] Furthermore,

[0028] The first baffle protrudes towards the air outlet, and the area of the end of the first baffle close to the air outlet is smaller than the area of the end far from the air outlet, so as to form the guiding portion on the periphery of the first baffle.

[0029] Furthermore,

[0030] The fan includes two air inlets, and the air flow directions of the two air inlets are not the same.

[0031] Compared with the prior art, the embodiments of the present utility model at least have the following technical effects:

[0032] An air flow inlet is provided on the housing, the fan includes an air inlet, and the air flow direction at the air flow inlet and the air flow direction at the air inlet are configured to be not the same. When air flows into the fan, due to the fact that the air flow direction at the air flow inlet and the air flow direction at the air inlet are configured to be not the same, the air flow direction of the air entering the fan will suddenly change. This sudden change will cause the air flow inside the fan to be chaotic, making it difficult for light foreign objects such as hair to be sucked into the fan interior from the air flow inlet. When the air flow direction in the fan suddenly changes, the speed and pressure distribution of the air flow in the fan will also change. This change will reduce the suction force at the air flow inlet of the fan, making it more difficult for foreign objects such as hair to be sucked in. Description of the Drawings

[0033] Figure 1 It is a three-dimensional structure diagram in an embodiment;

[0034] Figure 2 It is a three-dimensional structure diagram from another angle in an embodiment;

[0035] Figure 3 It is a cross-sectional view in an embodiment;

[0036] Figure 4 It is a cross-sectional view from another angle in an embodiment.

[0037] Explanation of the Reference Numerals in the Drawings:

[0038] 10. Housing;

[0039] 11. Storage space; 12. Air flow inlet; 13. Air flow outlet; 14. Fan support frame;

[0040] 120. Flanging portion; 121. Second baffle; 122. Rib;

[0041] 130. Opening; 131. First baffle; 132. Connecting rib;

[0042] 1200, horizontal part; 1201, vertical part; 1210, baffle; 1211, guiding wall;

[0043] 1310, guiding part;

[0044] 20, fan;

[0045] 21, impeller; 22, air inlet; 23, air outlet;

[0046] 30, handle. Specific embodiments

[0047] The technical solution of the present utility model will be further elaborated in detail below in conjunction with the accompanying drawings of the specification and specific embodiments. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the specification of the present utility model herein are only for the purpose of describing specific embodiments, and are not intended to limit the present utility model. In the following description, the expression "some embodiments" is described, which describes a subset of all possible embodiments. However, it should be understood that "some embodiments" may be the same subset or different subsets of all possible embodiments, and can be combined with each other without conflict.

[0048] It should be noted that when an element is referred to as "fixed to" another element, it can be directly on the other element or there may 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", "inner", "outer", "left", "right" and similar expressions used herein are only for the purpose of illustration, and do not represent the only implementation.

[0049] As Figures 1-4 shown, in an embodiment of the utility model, a portable fan is provided, including a housing 10 and a fan 20. A storage space 11 is provided inside the housing 10. An air inlet 12 and an air outlet 13 are respectively provided at opposite first and second ends of the housing 10. The air inlet 12 and the air outlet 13 are both connected to the storage space 11. The fan 20 is housed in the storage space 11. The fan 20 includes an impeller 21 having a plurality of fan blades, and an air inlet 22 and an air outlet 23 respectively provided on different sides of the impeller 21. The air flow direction at the air inlet 12 and the air flow direction at the air inlet 22 are configured to be different.

[0050] As Figure 3As shown, in the above-mentioned embodiment of the utility model, air flows into the fan, and the air flow direction at the air flow inlet 12 is configured to be different from the air flow direction at the air inlet 22. The air flow direction entering the fan will suddenly change. This sudden change in direction will cause chaos in the air flow inside the fan, making it difficult for light foreign objects such as hair to be sucked into the fan from the air flow inlet 12. When the air flow direction in the fan suddenly changes, the speed and pressure distribution of the air flow in the fan will also change. This change will reduce the suction force at the air flow inlet 12 in the fan, making it even more difficult for foreign objects such as hair to be sucked in.

[0051] As Figures 1-4 shown, in an embodiment of the utility model, the air flow direction at the air flow inlet 12 is perpendicular to the air flow direction at the air inlet 22. The two air flow directions being perpendicular results in a sudden change in the air flow direction in the fan. This sudden change in direction causes chaos in the air flow inside the fan, making it difficult for light foreign objects such as hair to be sucked into the fan from the air flow inlet 12. The sudden change in the air flow direction will also reduce the direct suction force at positions near the outside of the air flow inlet 12, making it even less likely to suck in light objects such as hair.

[0052] As Figures 1-4 shown, in an embodiment of the utility model, the air flow outlet 13 is provided with a first baffle 133. The fan 20 is a centrifugal fan. The air flow direction at the air outlet 23 is the same as the air flow direction at the air flow outlet 13. The air outlet 23 is arranged facing the first baffle 133, and along the direction perpendicular to the air flow direction at the air outlet 23, the air outlet 23 does not exceed the contour range of the first baffle 133. The first baffle 133 hinders the air at the air outlet 23 from directly flowing out from the air flow outlet 13. This hindrance causes the air flow to change direction. This sudden change in direction will cause chaos in the air flow inside the fan, making it difficult for light foreign objects such as hair to be sucked into the fan from the air flow inlet 12. In addition, setting the first baffle 133 can cover the fan 20, making the fan in a bladeless state.

[0053] As Figures 1-4As shown, in an embodiment of the utility model, a fan support frame 14 is provided inside the housing 10. The centrifugal fan 20 is installed in the housing 10 through the fan support frame 14. A second baffle 121 is provided at the air inlet 12. The centrifugal fan 20 is arranged facing the second baffle 121, and the air inlet 22 does not exceed the contour range of the second baffle 121. The second baffle 121 hinders the direct inflow of air from the air inlet 12 to the air inlet 22 of the fan. This hindrance causes the air flow inside the fan to turn, and this sudden turn causes chaos in the air flow inside the fan, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12. In addition, the second baffle 121 can cover the fan 20, making the fan in a bladeless state.

[0054] As Figures 1-4 As shown, in an embodiment of the utility model, the first end of the housing 10 includes a flanging portion 120 with a perforation formed in the center. The second baffle 121 is disposed in the perforation. The second baffle 121 and the flanging portion 120 are connected by a plurality of ribs 122. The air inlet 12 is formed between the outer peripheral edge of the second baffle 121 and the inner peripheral edge of the flanging portion 120.

[0055] The fan 20 does not exceed the inner contour of the air inlet 12 in the direction perpendicular to the second baffle 121. The flanging portion 120 and the second baffle 121 hinder the direct inflow of air from the air inlet 12 to the air inlet 22. This hindrance causes the air flow inside the fan to turn, and this sudden turn causes chaos in the air flow inside the fan, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12.

[0056] As Figures 1-4As shown, in an embodiment of the utility model, the hemmed part 120 includes a circular horizontal part 1200 extending inward from the outer periphery of the corresponding end face, and a vertical part 1201 extending by bending from the end of the horizontal part 1200. The second baffle 121 includes a baffle piece 1210 spaced and flush with the horizontal part 1200, and a guiding wall 1211 formed by bending from the outer periphery of the baffle piece 1210. The guiding wall 1211 and the vertical part 1201 are parallel to each other and spaced apart. The projection area of the fan 20 on the end face of the housing 10 is located inside the area surrounded by the guiding wall 1211. The guiding wall 1211 and the vertical part 1201 can further guide the air flow at the air inlet 12. And the projection area of the fan 20 on the end face of the housing 10 is located inside the area surrounded by the guiding wall 1211. The hemmed part 120 and the second baffle 121 can prevent air from directly flowing into the air inlet 22 of the fan 20 from the air inlet 12 of the fan. This obstruction will cause the air flow to turn. This sudden turn will cause the air flow inside the fan to be chaotic, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12 in this chaotic air flow.

[0057] As Figures 1-4 shown, in an embodiment of the utility model, the second end of the housing 10 includes a through opening 130. The first baffle 131 is arranged at the opening 130. The first baffle 131 is connected to the housing through a connecting rib 132. The air outlet 13 is formed between the first baffle 131 and the housing 10. The first baffle 131 prevents the air at the air outlet 23 from directly flowing out from the air outlet 13. This obstruction will cause the air flow to turn. This sudden turn will cause the air flow inside the fan to be chaotic, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12 in this chaotic air flow.

[0058] As Figures 1-4 shown, in an embodiment of the utility model, an inclined guiding part 1310 is arranged on the side of the first baffle 131 facing the storage space 11. The guiding part 1310 is used to diffuse and guide the air flow flowing out from the air outlet 23 to the air outlet 13. The air flow flowing out from the air outlet 23 of the fan 20 is blocked and guided by the inclined guiding part 1310. This obstruction will cause the air flow to turn. This sudden turn will cause the air flow inside the fan to be chaotic, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12 in this chaotic air flow.

[0059] As Figures 1-4As shown, in an embodiment of the utility model, the first baffle 131 protrudes towards the air outlet 23, and the area of one end of the first baffle 131 close to the air outlet 23 is smaller than the area of the end far from the air outlet 23, so as to form the guiding portion 1310 on the periphery of the first baffle 131. The air flow flowing out from the air outlet 23 of the fan 20 is blocked and guided by the guiding portion 1310 protruding towards the air outlet 23. This obstruction will cause the air flow to turn, and this sudden turn will cause the air flow inside the fan to be chaotic, making it difficult for light foreign objects such as hair to be sucked into the fan from the air inlet 12 in this chaotic air flow.

[0060] As Figures 1-4 shown, in an embodiment of the utility model, the fan 20 includes two air inlets 22, and the air flow directions of the two air inlets 22 are not the same. After the air flow flows in from the air inlet 12, it is divided into two air flows and flows into the two air inlets 22 of the fan 20 respectively. The air flow directions of each air flow flowing into the two air inlets 22 are not the same, which better avoids generating a relatively large suction force on light objects such as hair in the same direction due to a single air inlet 22 or multiple air inlets 22 with the same direction.

[0061] As Figures 1-4 shown, in an embodiment of the present utility model, it further includes a handle 30 connected to one side of the housing 10. The design of the handle 30 is easy for a human hand to hold. In this way, the user can operate the fan with one hand, adjust the direction or switch the fan on or off, while the other hand can perform other activities. In addition, the handle makes the fan easier to carry.

[0062] The above is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present utility model can easily think of changes or substitutions, which should all be covered within the protection scope of the present utility model. The protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A portable fan, characterized in that: include: A housing (10) is provided with a receiving space (11) therein, and an air flow inlet (12) and an air flow outlet (13) are provided at opposite first and second ends of the housing (10), respectively, and both the air flow inlet (12) and the air flow outlet (13) are in communication with the receiving space (11); A fan (20) is housed in the housing space (11), the fan (20) comprising an impeller (21) having a plurality of blades, and an air inlet (22) and an air outlet (23) respectively arranged on different sides of the impeller (21); The airflow direction at the airflow inlet (12) and the airflow direction at the air inlet (22) are configured to be different.

2. The portable fan according to claim 1, wherein The airflow direction at the airflow inlet (12) and the airflow direction at the air inlet (22) are perpendicular to each other.

3. The portable fan according to claim 1, wherein The airflow outlet (13) is provided with a first baffle (131); the fan (20) is a centrifugal fan; the airflow direction at the air outlet (23) is the same as the airflow direction of the airflow outlet (13); the air outlet (23) is arranged toward the first baffle (131); and along the airflow direction perpendicular to the air outlet (23), the air outlet (23) does not exceed the outline range of the first baffle (131).

4. The portable fan according to claim 3, characterized in that A fan support frame (14) is provided inside the housing (10), and the centrifugal fan is installed in the housing (10) through the fan support frame (14); The air flow inlet (12) is provided with a second baffle (121), the centrifugal fan is arranged toward the second baffle, and the air inlet (22) does not exceed the outline range of the second baffle (121).

5. The portable fan according to claim 4, characterized in that The first end of the housing (10) includes a folded edge portion (120) with a perforation formed in the center, the second baffle (121) is arranged in the perforation, the second baffle (121) and the folded edge portion (120) are connected via a plurality of ribs (122), and the air flow inlet (12) is formed between the outer periphery of the second baffle (121) and the inner periphery of the folded edge portion (120); The fan (20) does not extend beyond the inner contour of the air flow inlet (12) in a direction perpendicular to the second baffle.

6. The portable fan according to claim 5, characterized in that The folding portion (120) comprises an annular horizontal portion (1200) extending inward from the outer periphery corresponding to the first end surface, and a vertical portion (1201) extending from the end of the horizontal portion (1200). The second baffle (121) comprises a baffle (1210) spaced apart from and flush with the horizontal portion (1200), and a guide wall (1211) formed by bending from the outer periphery of the baffle (1210), wherein the guide wall (1211) and the vertical portion (1201) are parallel to and spaced apart from each other; The projection area of the fan (20) on the end surface of the housing (10) is located inside the area surrounded by the guide wall (1211).

7. The portable fan according to claim 3, characterized in that The second end of the housing (10) comprises a penetrating opening (130), the first baffle (131) is disposed at the opening (130), and the first baffle (131) is connected to the housing via a connecting rib (132); The air flow outlet (13) is formed between the first baffle (131) and the housing (10).

8. The portable fan according to claim 7, characterized in that A guide portion (1310) arranged obliquely is provided on one side of the first baffle (131) facing the storage space (11), and the guide portion is used to diffuse the airflow flowing out of the air outlet (23) and guide it to the airflow outlet (13).

9. The portable fan according to claim 8, characterized in that The first baffle (131) protrudes toward the air outlet (23), and the area of one end of the first baffle (131) close to the air outlet (23) is smaller than the area of one end away from the air outlet (23), so as to form the guide portion (1310) on the peripheral side of the first baffle (131).

10. The portable fan according to any one of claims 1 to 9, characterized in that The fan comprises two air inlets, and the airflow directions of the two air inlets are different.

Images