Hierarchical air duct structure and neck-hanging fan applying same

Abstract

The utility model discloses a hierarchical air duct structure and a neck-hanging fan applying the same, and relates to the technical field of life electric appliances, the hierarchical air duct structure comprises a fan placement area and a flow guide air duct area, the inner wall of the flow guide air duct area is sequentially provided with a plurality of flow guide rib plates along the extension direction of the flow guide rib plates, the inner cavity space of the flow guide air duct area is divided into an inclined air outlet sub-area inclined towards at least one air outlet and a horizontal airflow notch sub-area pointing to the farther end of the flow guide air duct area by the flow guide rib plates. The utility model mainly solves the problem of how to provide an efficient and reasonable air duct structure for the neck-hanging fan. When airflow passes through the flow guide rib plates of the flow guide air duct area, one part of the airflow is guided to the inclined air outlet sub-area, the other part of the airflow is guided to the horizontal airflow notch sub-area, through guiding of the flow guide rib plates, the airflow flowing speed of all positions of the whole flow guide air duct area is made to be uniform, and then the airflow flowing speed of all air outlets is made to be uniform. And the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of household electrical appliances, in particular to a hierarchical air duct structure and a neck-hanging fan using the same. Background Art

[0002] With the vortex fan (also known as "centrifugal fan") as the core, various types of air duct structures can be constructed. For example, vortex fans are used in common neck fans, cooling fans, some types of heaters, and the cooling system of laptop computers.

[0003] The neck hanging fan in the prior art usually has a long air guide duct, the air outlet of the air guide duct is usually also long, and each air outlet is arranged in sequence along the extension direction of the air guide duct. The air outlet of the vortex fan is poured into the air guide duct, guided by the air guide duct, and blown out from each air outlet.

[0004] For the neck-hanging fan with the above structure, since the air guide duct has a certain length and the air outlet of the vortex fan is poured into the air guide duct from the end, the farther away from the vortex fan in the air guide duct, the smaller the air flow velocity and wind pressure will be, making the air blown out of each air outlet of the neck-hanging fan uneven, affecting the user experience.

[0005] In summary, how to provide an efficient and reasonable air duct structure for the neck hanging fan has become an urgent problem to be solved. Utility Model Content

[0006] The purpose of the utility model is to provide a hierarchical air duct structure and a neck hanging fan using the same, which can provide an efficient and reasonable air duct structure for the neck hanging fan.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a hierarchical air duct structure, which is equipped with a vortex fan; it includes a fan installation area and a guide air duct area, the fan installation area and the guide air duct area are connected to each other; the vortex fan is arranged in the fan installation area, and the fan installation area is formed with an air intake grille in the axial direction of the vortex fan; the guide air duct area is sequentially arranged with a plurality of air outlets along its own extension direction; and the inner wall of the guide air duct area is sequentially arranged with a plurality of The guide ribs divide the inner cavity space of the guide air duct area into an inclined air outlet sub-area inclined toward at least one of the air outlets, and a horizontal airflow notch sub-area pointing to the farther end of the guide air duct area; the vortex fan can drive the airflow into the guide air duct area, and when the airflow passes through the guide ribs of the guide air duct area, a part of the airflow is guided to the inclined air outlet sub-area and blown out from the air outlet, and another part of the airflow is guided to the horizontal airflow notch sub-area and flows to the farther end of the guide air duct area.

[0008] In the above technical solution, the projection of the air outlet on the inner wall of the guide air duct area intersects with the root of the guide rib.

[0009] In the above technical solution, the projection of the air outlet on the inner wall of the air guide duct area intersects with the projection of the vertex of the air guide rib on the inner wall of the air guide duct area.

[0010] In the above technical solution, the cross section of the guide rib is a straight-line extension type or a curved-line extension type.

[0011] A neck hanging fan comprises at least one air outlet unit, each of the air outlet units comprises an air duct outer shell, an air duct inner shell, a vortex fan and an outer covering shell; the air duct outer shell is provided with an air inlet grille and a plurality of air outlets; the air duct inner shell is formed with a fan installation area and a guide air duct area, the fan installation area and the guide air duct area are connected with each other; the vortex fan is arranged in the fan installation area of ​​the air duct inner shell; the air duct outer shell and the outer covering shell are combined and fixed to each other, and the air duct inner shell is accommodated and fixed between the air duct outer shell and the outer covering shell, so that the air duct outer shell encloses the opening of the air duct inner shell, at this time, the air inlet grille of the air duct outer shell is located at the axial position of the vortex fan, and the air The air outlets of the duct outer shell are arranged in sequence along the extension direction of the guide air duct area of ​​the duct inner shell; the inner wall of the guide air duct area is arranged in sequence along its own extension direction with a plurality of guide ribs, and the guide ribs divide the inner cavity space of the guide air duct area into an inclined air outlet sub-area inclined toward at least one of the air outlets, and a horizontal airflow notch sub-area pointing to the farther end of the guide air duct area; the vortex fan can drive the airflow into the guide air duct area, and when the airflow passes through the guide ribs of the guide air duct area, a part of the airflow is guided to the inclined air outlet sub-area and blown out from the air outlet, and another part of the airflow is guided to the horizontal airflow notch sub-area and flows to the farther end of the guide air duct area.

[0012] In the above technical solution, the projection of the air outlet on the inner wall of the guide air duct area of ​​the air duct inner shell intersects with the root of the guide rib.

[0013] In the above technical solution, the projection of the air outlet on the inner wall of the air duct area of ​​the air duct inner shell intersects with the projection of the vertex of the air guide rib on the inner wall of the air duct area.

[0014] In the above technical solution, the cross section of the guide rib is a straight-line extension type or a curved-line extension type.

[0015] Compared with the prior art, the beneficial effects of the utility model are: the hierarchical air duct structure of the utility model and the neck-hanging fan using the same, the vortex fan can drive the airflow into the guide air duct area, and when the airflow passes through the guide ribs in the guide air duct area, part of the airflow is guided to the inclined air outlet sub-area and blown out from the air outlet, and the other part of the airflow is guided to the horizontal air flow notch sub-area and flows to the farther end of the guide air duct area; through the guidance of the guide ribs, the airflow velocity throughout the entire guide air duct area is averaged, and then the airflow velocity at each air outlet is averaged, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1This is a structural view of the first embodiment of the present utility model.

[0017] Figure 2 It is a cross-sectional view of the first embodiment of the present invention.

[0018] Figure 3 This is a structural view of the second embodiment of the present utility model.

[0019] Figure 4 It is a cross-sectional view of the second embodiment of the present utility model.

[0020] The accompanying drawings are marked as follows: 10, fan installation area; 101, air inlet grille; 20, guide air duct area; 201, air outlet; 202, guide ribs; 203, inclined air outlet sub-area; 204, horizontal air flow notch sub-area; 30, vortex fan; 1, air duct outer shell; 11, air inlet grille; 12, air outlet; 2, air duct inner shell; 21, fan installation area; 22, guide air duct area; 221, guide ribs; 222, inclined air outlet sub-area; 223, horizontal air flow notch sub-area; 3, vortex fan; 4, outer covering shell. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0022] Embodiment 1:

[0023] The present embodiment provides a hierarchical air duct structure, which can be applied to neck fans, cooling fans, some types of heaters, and the cooling system of laptop computers, etc., to provide an air duct structure with uniform wind force for the vortex fan 30 .

[0024] See also Figure 1 and Figure 2 The hierarchical air duct structure of this embodiment is equipped with a vortex fan 30.

[0025] In this embodiment, the vortex fan 30 (also called a "centrifugal fan") is a fan driven by a small DC motor.

[0026] The hierarchical air duct structure of the present embodiment includes a fan placement area 10 and a guide air duct area 20, and the fan placement area 10 and the guide air duct area 20 are interconnected; wherein, the fan placement area 10 and the guide air duct area 20 are independent chambers surrounded by the outer shell, inner shell or internal bracket of the product, the fan placement area 10 is roughly circular, and the guide air duct area 20 is roughly long and narrow.

[0027] The vortex fan 30 is arranged in the fan installation area 10 (the vortex fan 30 is fixed by screws or clips), and the fan installation area 10 is formed with an air intake grille 101 in the axial direction of the vortex fan 30. In this embodiment, the air intake grille 101 is formed on the outer shell, inner shell or internal bracket of the product, and is composed of a plurality of point-shaped holes.

[0028] The air guide duct area 20 is sequentially provided with a plurality of air outlets 201 along its own extension direction. In this embodiment, the air outlets 201 are formed on the outer shell, inner shell or internal bracket of the product and are composed of a plurality of strip-shaped through holes.

[0029] In addition, the inner wall of the guide air duct area 20 is sequentially arranged with a number of guide ribs 202 along its own extension direction. In the present embodiment, the guide ribs 202 are integrally formed with the inner wall constituting the guide air duct area 20. The guide ribs 202 divide the inner cavity space of the guide air duct area 20 into an inclined air outlet sub-area 203 inclined toward at least one air outlet 201, and a horizontal airflow notch sub-area 204 pointing to the farther end of the guide air duct area 20.

[0030] It should be noted that, in the present embodiment, the direction parallel to the bottom inner wall of the air duct area 20 is the horizontal direction, the direction directly pointing from the bottom inner wall of the air duct area 20 to the air outlet 201 is the vertical direction, and the directions having an angle with the horizontal direction / vertical direction are all inclined directions.

[0031] The vortex fan 30 can drive the air flow into the guide air duct area 20. When the air flow passes through the guide ribs 202 of the guide air duct area 20, part of the air flow is guided to the inclined air outlet sub-area 203 and blown out from the air outlet 201, and the other part of the air flow is guided to the horizontal air flow notch sub-area 204 and flows to the farther end of the guide air duct area 20.

[0032] Furthermore, the projection of the air outlet 201 on the inner wall of the air guide duct area 20 intersects with the root of the air guide rib 202 .

[0033] Furthermore, the projection of the air outlet 201 on the inner wall of the air guide duct area 20 intersects with the projection of the vertex of the air guide rib 202 on the inner wall of the air guide duct area 20 .

[0034] Furthermore, the cross-section of the guide rib 202 is a straight extension type or a curved extension type; when the cross-section of the guide rib 202 is a straight extension type, it has a better function of averaging the airflow velocity; when the cross-section of the guide rib 202 is a curved extension type, it can guide more airflow to the air outlet 201 to increase the wind force of the air outlet.

[0035] In the hierarchical air duct structure of the present embodiment, the vortex fan 30 can drive the air flow into the guide air duct area 20. When the air flow passes through the guide ribs 202 of the guide air duct area 20, a part of the air flow is guided to the inclined air outlet sub-area 203 and blown out from the air outlet 201, and the other part of the air flow is guided to the horizontal air flow notch sub-area 204 and flows to the farther end of the guide air duct area 20; through the guidance of the guide ribs 202, the air flow velocity throughout the entire guide air duct area 20 is averaged, and then the air flow velocity of each air outlet 201 is averaged, thereby improving the user experience.

[0036] Embodiment 2:

[0037] The present embodiment provides a neck hanging fan, which includes at least one air outlet unit. The present embodiment takes the right air outlet unit of the neck hanging fan as an example to specifically illustrate the air duct structure of the neck hanging fan.

[0038] See also Figure 3 and Figure 4 Each air outlet unit includes an air duct outer shell 1, an air duct inner shell 2, a vortex fan 3 and an outer covering shell 4.

[0039] The air duct outer shell 1, the air duct inner shell 2 and the outer covering shell 4 are all half shells made of engineering plastics, and the vortex fan 3 is a fan driven by a small DC motor.

[0040] An air inlet grille 11 and a plurality of air outlets 12 are provided at the air duct housing 1, wherein the air inlet grille 11 is composed of a plurality of point-shaped holes, and the air outlets 12 are composed of a plurality of strip-shaped through holes.

[0041] A fan placement area 21 and a guide air duct area 22 are formed at the air duct inner shell 2, and the fan placement area 21 and the guide air duct area 22 are connected to each other, wherein the fan placement area 21 and the guide air duct area 22 are chambers surrounded by the air duct inner shell 2, the fan placement area 21 is roughly circular, and the guide air duct area 22 is roughly long and narrow.

[0042] The vortex fan 3 is arranged in the fan installation area 21 of the air duct inner shell 2. In this embodiment, the vortex fan 3 is fixed by screws or buckles.

[0043] The duct outer shell 1 and the outer covering shell 4 are combined and fixed to each other, and the duct inner shell 2 is accommodated and fixed between the duct outer shell 1 and the outer covering shell 4. In the present embodiment, the three are fixed to each other by screws and / or snaps; the duct outer shell 1 encloses the opening of the duct inner shell 2. At this time, the air inlet grille 11 of the duct outer shell 1 is located at the axial position of the vortex fan 3, and the air outlet 12 of the duct outer shell 1 is arranged in sequence along the extension direction of the guide air duct area 22 of the duct inner shell 2.

[0044] The inner wall of the guide air duct area 22 is sequentially provided with a number of guide ribs 221 along its own extension direction. In the present embodiment, the guide ribs 221 are integrally formed with the inner wall constituting the guide air duct area 22. The guide ribs 221 divide the inner cavity space of the guide air duct area 22 into an inclined air outlet sub-area 222 inclined toward at least one air outlet 12, and a horizontal airflow notch sub-area 223 pointing to the farther end of the guide air duct area 22.

[0045] It should be noted that, in the present embodiment, the direction parallel to the bottom inner wall of the air duct area 22 is the horizontal direction, the direction directly pointing from the bottom inner wall of the air duct area 22 to the air outlet 12 is the vertical direction, and the directions having an angle with the horizontal direction / vertical direction are all inclined directions.

[0046] The vortex fan 3 can drive the air flow into the guide air duct area 22. When the air flow passes through the guide rib 221 of the guide air duct area 22, part of the air flow is guided to the inclined air outlet sub-area 222 and blown out from the air outlet 12, and the other part of the air flow is guided to the horizontal air flow notch sub-area 223 and flows to the farther end of the guide air duct area 22.

[0047] Furthermore, the projection of the air outlet 12 on the inner wall of the air guide duct area 22 intersects with the root of the air guide rib 221 .

[0048] Furthermore, the projection of the air outlet 12 on the inner wall of the air guide duct area 22 intersects with the projection of the vertex of the air guide rib 221 on the inner wall of the air guide duct area 22 .

[0049] Furthermore, the cross-section of the guide rib 221 is a straight extension type or a curved extension type; when the cross-section of the guide rib 221 is a straight extension type, it has a better function of averaging the airflow velocity; when the cross-section of the guide rib 221 is a curved extension type, it can guide more airflow to the air outlet 12 to increase the wind force of the air outlet.

[0050] In the neck-hanging fan of the present embodiment, the vortex fan 3 can drive the airflow into the guide duct area 22. When the airflow passes through the guide ribs 221 of the guide duct area 22, a part of the airflow is guided to the inclined air outlet sub-area 222 and blown out from the air outlet 12, and the other part of the airflow is guided to the horizontal airflow notch sub-area 223 and flows to the farther end of the guide duct area 22. Through the guidance of the guide ribs 221, the airflow velocity throughout the guide duct area 22 is averaged, and then the airflow velocity at each air outlet 12 of the neck-hanging fan is averaged, thereby improving the user experience.

[0051] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A hierarchical air duct structure, which is equipped with a vortex fan; characterized in that: It includes a fan installation area and a guide air duct area, and the fan installation area and the guide air duct area are connected to each other; The vortex fan is arranged in the fan installation area, and the fan installation area is formed with an air intake grille in the axial direction of the vortex fan; The guide air duct area is provided with a plurality of air outlets in sequence along its own extension direction; Furthermore, the inner wall of the guide air duct area is sequentially provided with a plurality of guide ribs along its own extension direction, and the guide ribs divide the inner cavity space of the guide air duct area into an inclined air outlet sub-area inclined toward at least one of the air outlets, and a horizontal air flow notch sub-area pointing to the further end of the guide air duct area; The vortex fan can drive the airflow into the guide air duct area. When the airflow passes through the guide ribs in the guide air duct area, part of the airflow is guided to the inclined air outlet sub-area and blown out from the air outlet, and the other part of the airflow is guided to the horizontal airflow notch sub-area and flows to the farther end of the guide air duct area.

2. The hierarchical air duct structure according to claim 1, characterized in that: The projection of the air outlet on the inner wall of the guide air duct area intersects with the root of the guide rib.

3. The hierarchical air duct structure according to claim 1 or 2, characterized in that: The projection of the air outlet on the inner wall of the air guide duct area intersects with the projection of the vertex of the air guide rib on the inner wall of the air guide duct area.

4. The hierarchical air duct structure according to claim 1, characterized in that: The cross section of the guide rib is a straight-line extension type or a curved-line extension type.

5. A neck hanging fan, comprising at least one air outlet unit, characterized in that: Each of the air outlet units comprises an air duct outer shell, an air duct inner shell, a vortex fan and an outer covering shell; The air duct shell is provided with an air inlet grille and a plurality of air outlets; The inner shell of the air duct is formed with a fan placement area and a guide air duct area, and the fan placement area and the guide air duct area are connected to each other; The vortex fan is arranged in the fan placement area of ​​the air duct inner shell; The air duct outer shell and the outer cover shell are combined and fixed to each other, and the air duct inner shell is accommodated and fixed between the air duct outer shell and the outer cover shell, so that the air duct outer shell encloses the opening of the air duct inner shell. At this time, the air inlet grille of the air duct outer shell is located at the axial position of the vortex fan, and the air outlet of the air duct outer shell is arranged in sequence along the extension direction of the guide air duct area of ​​the air duct inner shell; The inner wall of the guide air duct area is sequentially provided with a plurality of guide ribs along its own extension direction, and the guide ribs divide the inner cavity space of the guide air duct area into an inclined air outlet sub-area inclined toward at least one of the air outlets, and a horizontal air flow notch sub-area pointing to the further end of the guide air duct area; The vortex fan can drive the airflow into the guide air duct area. When the airflow passes through the guide ribs in the guide air duct area, part of the airflow is guided to the inclined air outlet sub-area and blown out from the air outlet, and the other part of the airflow is guided to the horizontal airflow notch sub-area and flows to the farther end of the guide air duct area.

6. The neck hanging fan according to claim 5, characterized in that: The projection of the air outlet on the inner wall of the air guide duct area of ​​the air duct inner shell intersects with the root of the air guide rib.

7. The neck hanging fan according to claim 5, characterized in that: The projection of the air outlet on the inner wall of the air duct area of ​​the air duct inner shell intersects with the projection of the vertex of the air duct rib on the inner wall of the air duct area.

8. The neck hanging fan according to claim 5, characterized in that: The cross section of the guide rib is a straight-line extension type or a curved-line extension type.

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