A neck-hung fan

Abstract

This utility model provides a neck fan, including a fan housing, a fan wheel, a heat sink, and a cooling fin. The fan housing has a converging cavity and a first airflow channel and a second airflow channel respectively connected to the converging cavity. The air outlets of the first and second airflow channels face different directions. The fan wheel is disposed within the converging cavity. The cooling fin is disposed on the fan housing with its cold end facing outwards. The hot end of the cooling fin forms thermal contact with a heat sink, which is placed within the second airflow channel. This design enables rapid heat dissipation from the cooling fin, ensuring its continuous and stable operation.

Description

Technical Field

[0001] This utility model relates to the field of fan technology, specifically to a neck-hanging fan. Background Technology

[0002] An electric fan is a household appliance that uses an electric motor to drive the fan blades to rotate, thereby accelerating the circulation of air. It is mainly used for cooling and ventilating the air and is widely used in homes, classrooms, offices and other places. With the increase in people's demand, more and more portable mini fans have entered the market. Among them, the neck fan is a type of portable fan, which is more convenient to use and does not require holding.

[0003] To improve cooling performance, some existing neck fans are equipped with cooling pads (i.e., semiconductor cooling pads), which are often used to directly cool the body when placed on the neck. However, these pads also generate heat, and if the heat cannot be dissipated in time, it will affect the cooling effect. Therefore, a neck fan that can quickly dissipate heat from the cooling pad is needed. Utility Model Content

[0004] Therefore, to solve the above problems, this utility model provides a neck-hanging fan.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A neck fan includes a fan housing, a fan impeller, a radiator, and a cooling fin. The fan housing has a converging cavity and a first airflow channel and a second airflow channel respectively connected to the converging cavity. The air outlets of the first airflow channel and the second airflow channel have different orientations. The fan impeller is disposed in the converging cavity. The cooling fin is disposed on the fan housing with its cold end facing outwards. The hot end of the cooling fin forms thermal contact with the radiator. The radiator is placed in the second airflow channel.

[0007] Furthermore, the impeller is a centrifugal impeller; the first airflow channel and the second airflow channel are designed as upper and lower layers in the axial direction of the impeller and are separated by a partition.

[0008] Furthermore, the height of the second airflow channel does not exceed the center of the wind turbine in the axial direction.

[0009] Furthermore, the cold end of the cooling chip is not directly exposed; the outer side of the cold end of the cooling chip is attached to one side wall of the fan housing, or an outer covering layer is attached to the outer side of the cold end of the cooling chip.

[0010] Furthermore, the first airflow channel is provided with multiple guide plates, which divide the first airflow channel into multiple guide channels, and the guide channels extend from the air inlet of the first airflow channel to the air outlet.

[0011] Furthermore, the first airflow channel has multiple air outlets spaced apart along one direction.

[0012] Furthermore, the radiator has a plurality of spaced-apart heat sinks, which divide the second airflow channel into a plurality of heat dissipation branches.

[0013] Furthermore, the air outlets of the first airflow channel and the second airflow channel are located on different sides of the fan housing.

[0014] Furthermore, the fan housing has a fan wheel mounting shell and an elongated box connecting the fan wheel mounting shell. The converging cavity is formed inside the fan wheel mounting shell, and a ventilation opening is provided on the fan wheel mounting shell. The first airflow channel and the second airflow channel are formed inside the elongated box, and the air outlets of the first airflow channel and the second airflow channel are both opened on the elongated box.

[0015] Furthermore, the fan housing is provided with a power supply connector, which is electrically connected to the impeller and the cooling plate.

[0016] The technical solution provided by this utility model has the following beneficial effects:

[0017] When using the product, it is hung around the neck via an external neckband assembly, with the cold end of the outward-facing cooling element contacting the body surface for cooling. Simultaneously, the airflow from the impeller is distributed into the first and second airflow channels. The air output through the first airflow channel dissipates heat from the body, while the heat generated by the hot end of the cooling element is conducted to the radiator and carried away by the airflow through the second airflow channel, achieving rapid heat dissipation and ensuring continuous and stable operation of the cooling element. 2. The impeller is a centrifugal impeller; the first and second airflow channels are designed as upper and lower layers along the axial direction of the impeller. The centrifugal impeller blows air out circumferentially, and the height ratio of the first and second airflow channels can be controlled, thus effectively controlling the airflow ratio within the two channels. During product design, the height ratio of the first and second airflow channels can be adjusted according to actual application requirements to modify the airflow ratio, simplifying the design. Attached Figure Description

[0018] Figure 1 The figure shown is a three-dimensional schematic diagram of the neck fan in the embodiment;

[0019] Figure 2 The image shown is a front view of the neck fan in the embodiment.

[0020] Figure 3 As shown Figure 2 Sectional view of line AA in the middle;

[0021] Figure 4 The image shown is a side view of the neck fan in the embodiment;

[0022] Figure 5 As shown Figure 4 Sectional view of the middle BB line;

[0023] Figure 6 As shown Figure 4 A cross-sectional view of the CC line. Detailed Implementation

[0024] To further illustrate the various embodiments, the present invention provides accompanying drawings. These drawings are part of the disclosure of the present invention and are mainly used to illustrate the embodiments, and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these drawings, those skilled in the art should be able to understand other possible implementations and the advantages of the present invention. Components in the drawings are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0025] In the description of this utility model, terms such as "upper", "lower", "left", "right", "front", and "rear" are based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0026] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0027] Reference Figures 1 to 6 As shown, this embodiment provides a neck fan including a fan housing 10, a fan wheel 20, a radiator 40, and a cooling plate 30. The fan housing 10 has a converging cavity 101 and a first airflow channel 102 and a second airflow channel 103 respectively connected to the converging cavity 101. That is, the air inlets of the first airflow channel 102 and the second airflow channel 103 are both connected to the converging cavity 101. The air outlets of the first airflow channel 102 and the second airflow channel 103 have different orientations. For ease of explanation, the air outlet of the first airflow channel 102 is defined as the first air outlet 121, and the air outlet of the second airflow channel 103 is defined as the second air outlet 122.

[0028] The impeller 20 is disposed in the converging cavity 101, and the cooling chip 30 is disposed on the fan housing 10 with the cold end of the cooling chip facing outward. In this embodiment, the cooling chip 30 is attached to the inner wall of the second airflow channel 103, with the cold end of the cooling chip 30 facing outward and separated from the outside by a side wall of the fan housing 10. The hot end of the cooling chip 30 forms thermal contact with the radiator 40, and the radiator 40 is placed in the second airflow channel 103.

[0029] In practical use, the fan housing 10 is connected to a neck strap assembly, which hangs around the user's neck. The cold end of the outward-facing cooling element 30 contacts the human body surface for cooling. Specifically, the cold energy of the cold end of the cooling element is brought into contact with the human body surface through the side wall of the fan housing 10, thus achieving contact cooling. The first air outlet 121 faces upward towards the human body part, such as the face or neck, while the second air outlet 122 can be offset from the human body part. The airflow blown out by the impeller 20 is distributed into the first airflow channel 102 and the second airflow channel 103. The airflow output through the first airflow channel 102 is used to dissipate heat from the human body; while the heat generated by the hot end of the cooling element 30 is conducted to the radiator and carried away by the airflow flowing through the second airflow channel 103, achieving rapid heat dissipation of the cooling element 30 and ensuring its continuous and stable operation.

[0030] Because the first air outlet 121 and the second air outlet 122 are oriented differently, the cold air blown out by the first air outlet 121 and the hot air blown out by the second air outlet 122 will not converge, which can effectively prevent the hot air from blowing towards the human body.

[0031] Preferably, the cold end of the cooling element 30 is not directly exposed to avoid the risk of frostbite caused by the cold end of the cooling element 30 directly contacting the skin; as in this embodiment, the cold end of the cooling element 30 is separated from the outside by a side wall of the fan housing 10, and the skin is contacted through the fan housing 10; or the cold end of the cooling element 30 is exposed on the surface of the fan housing 10, in which case an outer covering layer (such as a silicone layer) can be attached to the outside of the cold end of the cooling element 30 for isolation.

[0032] Specifically, in this embodiment, the impeller 20 is a centrifugal impeller. When this centrifugal impeller rotates, it generates negative pressure, drawing in air in the axial direction and blowing it out relatively evenly in the circumferential direction. The first airflow channel 102 and the second airflow channel 103 are located on the same side of the impeller 20, such as... Figure 3 As shown, the first airflow channel 102 and the second airflow channel 103 are designed as upper and lower layers in the axial direction of the impeller 20, wherein the first airflow channel 102 and the second airflow channel 103 are separated by a partition 13.

[0033] The impeller 20 blows air out in the circumferential direction, thus controlling the height ratio of the first airflow channel 102 and the second airflow channel 103, thereby effectively controlling the airflow ratio in the two airflow channels. When designing the product, the height ratio of the first airflow channel 102 and the second airflow channel 103 can be changed according to the actual application requirements to adjust the air volume ratio, simplifying the design.

[0034] Specifically, the airflow in the second airflow channel 103 is only used for heat dissipation. While meeting basic heat dissipation requirements, more airflow needs to be used for cooling the human body. Therefore, the height of the second airflow channel 103 does not exceed the center of the impeller 20 in the axial direction. Figure 3 As shown, the axial direction of the impeller 20 is vertical. The first airflow channel 102 and the second airflow channel 103 are designed as upper and lower layers. The second airflow channel 103 is located in the lower layer. The highest point b of the air inlet of the second airflow channel 103 does not exceed the center point a of the impeller 20 in the vertical direction. In this way, more airflow can flow to the first airflow channel 102, so that the first airflow channel 102 can receive more airflow.

[0035] Furthermore, the first airflow channel 102 is provided with multiple guide plates 14, which divide the first airflow channel 102 into multiple guide channels. The guide channels extend from the air inlet of the first airflow channel 102 to the first air outlet 121. Moreover, multiple first air outlets 121 are arranged at intervals along one direction, with a larger distribution range and a larger air outlet surface.

[0036] Since the first airflow channel 102 and the second airflow channel 103 are designed as upper and lower layers in the axial direction of the impeller 20, and the second airflow channel 103 can be designed as a regular space such as a cube, the shape of the radiator 40 placed in the second airflow channel 103 can be of regular size. In this embodiment, it is a cube outline, which is easy to manufacture. If the shape is irregular, it needs to be achieved by mold making, while the radiator 40 with a regular shape does not need to be manufactured by mold making, which can reduce a certain cost.

[0037] Specifically, in this embodiment, the radiator 40 has multiple spaced-apart heat dissipation fins, which divide the second airflow channel 103 into multiple heat dissipation branches. This configuration allows the airflow through the second airflow channel 103 to be divided into multiple branches, resulting in greater contact with the radiator 40 and better heat dissipation. Of course, in other embodiments, the structure of the radiator 40 is not limited to this.

[0038] Furthermore, the first air outlet 121 and the second air outlet 122 are located on different sides of the fan housing 10. For example, in this embodiment, the first air outlet 121 faces upward, and the second air outlet 122 faces forward. When used as a neckband, the airflow from the first air outlet 121 blows upward toward the face, while the hot airflow from the second air outlet 122 blows forward, avoiding direct contact with the body. Of course, in other embodiments, the design of the first air outlet 121 and the second air outlet 122 is not limited to this; for example, the second air outlet 122 can also be located on the lower side.

[0039] Specifically, the fan housing 10 has a fan wheel mounting shell 11 and a long box 12 connected to the fan wheel mounting shell 11. The flow-gathering cavity 101 is formed inside the fan wheel mounting shell 11, and the fan wheel mounting shell 11 has a ventilation opening 111. The first airflow channel 102 and the second airflow channel 103 are formed inside the long box 12, and the first air outlet 121 and the second air outlet 122 are both opened on the long box 12.

[0040] Furthermore, the fan housing 10 is provided with a power supply connector, which electrically connects the impeller 20 and the cooling element 30; in use, power is supplied through an external mobile power source. Of course, in other embodiments, a battery can also be installed inside the fan housing 10 to provide power.

[0041] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A neck-hung fan, comprising a fan shell, a fan wheel, a radiator and a refrigeration fin, characterized in that: The fan housing has a converging cavity and a first airflow channel and a second airflow channel respectively connected to the converging cavity. The air outlets of the first airflow channel and the second airflow channel have different orientations. The impeller is disposed in the converging cavity. The cooling plate is disposed on the fan housing with the cold end of the cooling plate facing outward. The hot end of the cooling plate forms thermal contact with the heat sink. The heat sink is placed in the second airflow channel.

2. The neck fan of claim 1, wherein: The impeller is a centrifugal impeller; the first airflow channel and the second airflow channel are designed as upper and lower layers in the axial direction of the impeller and are separated by a partition.

3. The hanging neck fan of claim 2, wherein: The height of the second airflow channel does not exceed the center of the wind turbine in the axial direction.

4. The neck fan according to claim 1, characterized in that: The cold end of the cooling chip is not directly exposed; the outer side of the cold end of the cooling chip is attached to one side wall of the fan housing, or an outer covering layer is attached to the outer side of the cold end of the cooling chip.

5. The neck fan according to claim 1, characterized in that: The first airflow channel is provided with multiple guide plates, which divide the first airflow channel into multiple guide channels. The guide channels extend from the air inlet of the first airflow channel to the air outlet.

6. The neck fan according to claim 5, characterized in that: The first airflow channel has multiple air outlets spaced apart along one direction.

7. The neck fan according to claim 1, characterized in that: The radiator has multiple spaced-apart heat sinks, which divide the second airflow channel into multiple heat dissipation branches.

8. The neck fan according to claim 1, characterized in that: The air outlets of the first airflow channel and the second airflow channel are located on different sides of the fan housing.

9. The neck fan according to any one of claims 1 to 8, characterized in that: The fan housing has a fan wheel mounting shell and a long box connecting the fan wheel mounting shell. The flow-gathering cavity is formed inside the fan wheel mounting shell, and the fan wheel mounting shell has a ventilation opening. The first airflow channel and the second airflow channel are formed inside the long box, and the air outlets of the first airflow channel and the second airflow channel are both opened on the long box.

10. The neck fan according to claim 1, characterized in that: The fan housing is provided with a power supply connector, which is electrically connected to the impeller and the cooling plate.

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