Handheld fan

Abstract

The utility model provides a handheld fan which comprises a holding part, an air duct arranged at the top end of the holding part, a fan arranged in the air duct, a flow guide piece fixedly arranged on the air duct and facing the air outlet end of the fan, and an air outlet part arranged facing the air outlet end of the flow guide piece and kept relatively fixed. The flow guide part comprises a plurality of flow guide blades evenly distributed around the central axis in the circumferential direction, the flow guide blades are twisted in the radial direction, the flow guide blades are suitable for turning the flow direction of deflection airflow output by the fan back to be parallel to the central axis, the air outlet part comprises a plurality of air outlet fences evenly distributed around the central axis in the circumferential direction, and the air outlet fences participate in limiting to form an air outlet. Through the synergistic effect of the flow guide part and the air outlet part, unnecessary radial or tangential flow components generated by air flow are restrained, the air volume and the static pressure efficiency are improved, and the air flow can be stably and evenly blown out in the central axis direction.

Description

Technical Field

[0001] The utility model belongs to the technical field of fans, and in particular relates to a handheld fan. Background Art

[0002] Traditional handheld fan designs often suffer from inefficient airflow, unstable airflow, and uneven airflow. These issues primarily stem from inadequate fan dynamics, which results in unnecessary radial or tangential flow components during airflow delivery, reducing both air volume and static pressure efficiency. Furthermore, traditional fans often fail to effectively convert dynamic pressure into static pressure, resulting in dispersed and unfocused wind force. Therefore, there is a need for a new type of handheld fan that can provide more efficient, stable airflow, and more uniform airflow. Utility Model Content

[0003] In view of the above-mentioned defects of the prior art, the purpose of the present invention is to provide a handheld fan to meet the needs of users.

[0004] To achieve the above object, the utility model provides a handheld fan, comprising:

[0005] Grip;

[0006] a hair dryer, which is arranged at the top end of the grip portion;

[0007] A fan is arranged inside the wind tube, and the axis of the fan is defined as the central axis;

[0008] A flow guide member, which is fixedly mounted on the air duct and faces the air outlet end of the fan, and includes a plurality of guide blades uniformly distributed circumferentially around the central axis, the guide blades twisting in the radial direction, and adapted to rotate the flow direction of the deflected airflow output by the fan back to be parallel to the central axis, thereby suppressing the airflow from generating unnecessary radial or tangential flow components, converting the dynamic pressure of the gas into static pressure, improving the air volume and static pressure efficiency, and ensuring that the airflow passes through the air outlet fence in a relatively stable axial flow state;

[0009] The air outlet portion is arranged at the air outlet end facing the guide member and remains relatively fixed, and includes a plurality of air outlet fences evenly distributed circumferentially around the central axis. The air outlet fences participate in defining the air outlet, correcting the air outlet direction and angle, guiding the airflow to flow out along the central axis, and relatively evenly distributing the air volume in the direction perpendicular to the central axis, so as to achieve a smooth and balanced air supply effect.

[0010] Preferably, the guide member includes a concentrically arranged guide inner ring and a guide outer ring, the guide blade includes a blade root suitable for connecting to the guide inner ring and a blade tip suitable for connecting to the guide outer ring, and the guide blade twists radially from the blade root to the blade tip.

[0011] Preferably, the fan comprises a plurality of blades uniformly distributed circumferentially around the central axis, the blades being twisted radially, wherein one of the blades and the guide blades is twisted in a clockwise direction, and the other of the blades and the guide blades is twisted in a counterclockwise direction.

[0012] Preferably, the number of the guide blades is 1 to 2 times the number of the fan blades.

[0013] Preferably, the air outlet portion includes an inner air outlet ring and an outer air outlet ring which are arranged concentrically, and the outer air outlet ring is plug-fitted or extended with the guide outer ring, and at least part of the inner air outlet ring is suitable for forming a trumpet-shaped or figure-eight-shaped guide platform, and the convergent end of the guide platform is arranged toward the guide member. The shape design of the guide platform conforms to the airflow dynamics and can reduce noise generation. As the airflow flows, the gap between the guide platform and the outer air outlet ring gradually shrinks, thereby compressing the airflow and increasing the wind pressure.

[0014] As a preference, the air outlet outer ring and the air duct are assembled along the central axis.

[0015] As a preferred embodiment: the air outlet outer ring includes a plurality of circumferentially evenly distributed card slots and a positioning slot arranged along the central axis direction, the inner circumferential wall of the air duct includes a plurality of clips and a positioning ridge, and the positioning slots and the positioning ridges slide together to guide the card slots and the clips to engage.

[0016] As a preferred embodiment: the air outlet outer ring includes a plurality of mating grooves and a positioning groove arranged along the central axis direction, the inner wall of the air duct includes a plurality of mating strips and a positioning rib, and the positioning grooves and the positioning ribs are slidably matched to guide the mating grooves and the mating strips to be tightly mated.

[0017] Preferably, the fan includes a motor suitable for driving the fan blades to rotate, the flow guide member further includes a back plate, and the flow guide inner ring and the back plate are combined to form a first cavity suitable for accommodating the motor.

[0018] Preferably, the air outlet includes a second cavity, a cooling fin disposed at one axial end of the second cavity away from the air guide, and a semiconductor cooling fin is mounted within the second cavity, with the hot end of the semiconductor cooling fin facing the air guide and the cold end of the semiconductor cooling fin in contact with the cooling fin. Users can select air blowing or cooling mode based on their needs. In cooling mode, the cooling fin provides a cooling effect, further enhancing the cooling experience.

[0019] As a preferred embodiment, the cooling plate is higher than the air outlet fence to avoid blocking the air outlet during cold compress.

[0020] Preferably, the air outlet inner ring includes a first air outlet inner ring and a second air outlet inner ring that are coaxially arranged, and the air outlet grille includes a first air outlet grille and a second air outlet grille. The first air outlet grille is evenly connected to the first air outlet inner ring in the circumferential direction, the first air outlet inner ring is in contact with the air outlet outer ring, and the second air outlet grille is suitable for fixedly connecting the second air outlet inner ring and the air outlet outer ring. The first air outlet inner ring is composed of the outer circumferential surface of a circular partition, and the second air outlet inner ring is suitable for enclosing and forming the second cavity. The circular partition is arranged between the first cavity and the second cavity, the first air outlet grille is docked with the second air outlet grille, and the second air outlet inner ring and the guide inner ring clamp and fix the circular partition.

[0021] Preferably, the air outlet inner ring is suitable for enclosing and forming the second cavity, and one end of the second cavity facing the flow guide is connected to the first cavity.

[0022] Preferably, the bottom of the handle is covered with a non-slip pad, which helps the handheld fan remain stable when placed on a countertop, expanding its use cases. The handle houses a built-in battery and a control circuit board, with the battery positioned along the length of the handle. The control circuit board is electrically connected to the motor and the semiconductor cooling chip, and is electrically connected to several control buttons and a display screen, which is adapted to display the cold end temperature of the semiconductor cooling chip.

[0023] As a preferred embodiment, the device comprises a first shell and a second shell, wherein the first shell comprises a first air cylinder and a first half shell, and the second shell comprises a second air cylinder and a second half shell, and the first shell and the second shell are adapted to be spliced ​​and matched along the central axis, wherein:

[0024] The first air duct and the second air duct are butt-jointed to form the air duct, the flow guide is arranged inside the first air duct, and the second air duct is provided with an air inlet;

[0025] The first half shell and the second half shell are butt-jointed to form the gripping portion. The first half shell includes a visible portion for observing the display screen and a button hole for exposing the control button. The visible portion and the button hole are arranged at one end adjacent to the first air duct, so that the user can conveniently control the fan and cooling functions and can intuitively understand the working status of the refrigeration fin, thereby improving the usability and intelligence of the product.

[0026] Preferably, a wiring groove adapted to connect the first cavity and the gripping portion is provided in the first air duct, and the circular partition includes a wiring hole, which is connected to the wiring groove.

[0027] The beneficial effects of the utility model are:

[0028] 1. Through the synergistic effect of the guide and the air outlet, the airflow is suppressed from generating unnecessary radial or tangential flow components, and the dynamic pressure of the gas is converted into static pressure, thereby improving the air volume and static pressure efficiency. The airflow can be blown out smoothly and evenly along the central axis, reducing the noise caused by turbulence caused by obstacles, and greatly improving the user's comfort during use.

[0029] Second, through the integration of semiconductor cooling chips, a cooling function is provided, making the handheld fan more practical in hot environments.

[0030] 3. The compact structure and high functional integration, as well as the detachable design of the air outlet outer ring and the guide outer ring, make the product assembly process simpler and more efficient, thus reducing assembly costs and improving production efficiency. At the same time, the detachable design also facilitates product maintenance and component replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 This is a structural schematic diagram of a handheld fan provided in Example 1.

[0032] Figure 2 This is a schematic diagram of an explosion of a handheld fan provided in Example 1.

[0033] Figure 3 This is a cross-sectional schematic diagram of a handheld fan provided in Example 1.

[0034] Figure 4 This is a schematic structural diagram of the first shell provided in Example 1.

[0035] Figure 5 This is a schematic structural diagram of the air outlet portion provided in Example 1.

[0036] In the figure: air duct 101, grip portion 102, anti-slip pad 103, first shell 11, first air duct 111, first half shell 112, wiring groove 113, positioning ridge 115, visible portion 116, mating strip 117, second shell 12, second air duct 121, second half shell 122, air inlet 123, fan blade 211, semiconductor refrigeration plate 22, cooling plate 221, battery 23, control circuit board 24, display screen 241, control button 242, air guide 30, guide inner ring 31, guide blade 32, back plate 33, first cavity 301, air outlet portion 40, air outlet outer ring 41, positioning groove 412, mating groove 413, air outlet inner ring 42, air outlet fence 43, air outlet 44, second cavity 401. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.

[0038] It should also be noted here that, in order to avoid obscuring the present invention due to unnecessary details, only structures and / or processing steps closely related to the scheme of the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0039] In addition, it should be noted that the terms "comprises", "includes" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0040] Example 1

[0041] like Figure 1-5 The handheld fan comprises a gripping portion 102, a wind tube 101 arranged at the top of the gripping portion 102, a fan arranged inside the wind tube 101, a flow guide 30 and an air outlet portion 40 arranged from near to far towards the air outlet end of the fan. The axis of the fan is defined as the central axis. The fan comprises a plurality of fan blades 211 uniformly distributed circumferentially around the central axis, and the fan blades 211 twist in a clockwise direction in their radial direction. The flow guide 30 comprises a concentrically arranged flow guide inner ring 31 and a flow guide outer ring, and a plurality of flow guide blades 32 uniformly distributed circumferentially around the central axis, the flow guide blades 32 comprising a blade root suitable for connecting to the flow guide inner ring 31 and a blade tip suitable for connecting to the flow guide outer ring, and the flow guide blades 32 twist in a counterclockwise direction from the blade root to the blade tip in the radial direction. Part of the wind tube 101 is suitable for constituting the flow guide outer ring. The guide vanes 32 are adapted to rotate the deflected airflow output by the fan back to parallel with the central axis, suppressing unnecessary radial or tangential flow components, converting the dynamic pressure of the gas into static pressure, improving airflow volume and static pressure efficiency, and ensuring that the airflow passes through the outlet 40 in a relatively stable axial flow state. The outlet 40 includes a plurality of air outlet grilles 43 uniformly distributed circumferentially around the central axis. These grilles 43 help define the air outlet 44, correcting the direction and angle of the airflow, guiding the airflow outward along the central axis, and relatively evenly distributing the air volume in a direction perpendicular to the central axis, thereby achieving a smooth and balanced air supply.

[0042] In this embodiment, the number of the fan blades 211 is 6, and the number of the guide blades 32 is 7, and the two are prime numbers to each other, which can avoid resonance.

[0043] In this embodiment, the air outlet portion 40 includes a concentrically arranged air outlet inner ring and an air outlet outer ring 41. The air outlet inner ring 42 is adapted to enclose a second cavity 401. The second cavity 401 is connected to the first cavity 301 at one end facing the air guide 30. The air outlet outer ring 41 includes three mating grooves 413 and a positioning groove 412 arranged along the central axis. The inner circumferential wall of the first air tube 111 includes a plurality of mating strips 117 and a positioning rib 115. The positioning grooves 412 and the positioning rib 115 slide together to guide the mating grooves 413 and the mating strip 117 to securely mate. The air outlet outer ring 41 is mated with the air guide outer ring. At least a portion of the air outlet inner ring is adapted to form a trumpet-shaped air guide platform, with the converging end of the air guide platform facing the air guide 30. The shape of the air guide platform is designed to conform to airflow dynamics and reduce noise generation. As the air flows, the gap between the air guide platform and the air outlet outer ring 41 gradually shrinks, thereby compressing the airflow and increasing the air pressure.

[0044] In this embodiment, the fan includes a motor suitable for driving the fan blades 211 to rotate, and the air guide 30 also includes a back plate 33. The air guide inner ring 31 and the back plate 33 enclose a first cavity 301 suitable for accommodating the motor. A cooling plate 221 is provided at one axial end of the second cavity 401 away from the air guide 30. The second cavity 401 is suitable for installing a semiconductor refrigeration plate 22. The hot end of the semiconductor refrigeration plate 22 is arranged toward the air guide 30, and the cold end of the semiconductor refrigeration plate 22 is in contact with the cooling plate 221. Users can choose the blowing or cooling mode according to their needs. In the cooling mode, a certain cooling effect can be obtained by the cooling plate 221, further enhancing the cooling experience. Specifically, the cooling plate 221 is higher than the air outlet fence to avoid blocking the air outlet 44 during cooling.

[0045] In this embodiment, the handheld fan includes a first shell 11 and a second shell 12. The first shell 11 includes a first air cylinder 111 and a first half shell 112. The second shell 12 includes a second air cylinder 121 and a second half shell 122. The first shell 11 and the second shell 12 are suitable for splicing and matching along the central axis, wherein: the first air cylinder 111 and the second air cylinder 121 are docked and matched to form the air cylinder 101, the air guide 30 is arranged inside the first air cylinder 111, and the second air cylinder 121 is provided with an air inlet 123. The first half shell 112 and the second half shell 122 are docked and matched with the grip portion 102. The grip portion 102 has a built-in battery 23 and a control circuit board 24. A wiring groove 113 suitable for connecting the first cavity 301 and the grip portion 102 is provided in the first air cylinder 111.

[0046] In this embodiment, the battery 23 is arranged along the length of the grip portion 102, the control circuit board 24 is electrically connected to the motor and the semiconductor refrigeration plate 22, and the control circuit board 24 is electrically connected to a number of control buttons 242 and a display screen 241. The display screen 241 is suitable for displaying the cold end temperature of the semiconductor refrigeration plate 22. The first half shell 112 includes a visible portion 116 suitable for observing the display screen 241 and a button hole suitable for exposing the control button 242. The visible portion 116 and the button hole are arranged at one end adjacent to the first air tube 111, so that the user can easily control the fan and cooling functions, and can intuitively understand the working status of the refrigeration plate, thereby improving the usability and intelligence of the product. The bottom end of the grip portion 102 is covered with an anti-slip pad 103. This design helps the handheld fan to remain stable when placed on a table, increasing the usage scenarios.

[0047] Example 2

[0048] A handheld fan, compared with Example 1, differs in that the air outlet inner ring includes a first air outlet inner ring and a second air outlet inner ring arranged coaxially, the air outlet grille includes a first air outlet grille and a second air outlet grille, the first air outlet grille is circumferentially and evenly connected to the first air outlet inner ring, the first air outlet grille is in contact with and cooperates with the air outlet outer ring 41, and the second air outlet grille is suitable for fixedly connecting the second air outlet inner ring and the air outlet outer ring 41.

[0049] In this embodiment, the second air outlet inner ring is adapted to enclose and form the second cavity 401. The first air outlet inner ring is formed by the outer circumference of a circular partition disposed between the first cavity 301 and the second cavity 401. The first air outlet grille and the second air outlet grille are mated and engaged. The circular partition includes a wiring hole that communicates with the wiring groove 113.

[0050] In this embodiment, the inner circumference of the first air duct 111 is symmetrically provided with two clips and a positioning rib 115 located between the clips. The outer circumference of the air outlet outer ring 41 is correspondingly provided with two slots and a positioning groove 412. The positioning groove 412 and the positioning rib 115 are adapted to slide axially, thereby guiding the slots and clips into engagement, and the second air outlet inner ring and the guide inner ring 31 clamp and secure the circular partition. In some other embodiments, the air outlet outer ring 41 and the first air duct 111 are magnetically or threadedly engaged.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention.

Claims

1. A handheld fan, characterized in that: include: Grip; a hair dryer, which is arranged at the top of the grip portion; A fan is arranged inside the wind tube, and the axis of the fan is defined as the central axis; a flow guide member fixedly mounted on the air duct and facing the air outlet end of the fan, comprising a plurality of flow guide blades uniformly distributed circumferentially around the central axis, the flow guide blades twisting in the radial direction, and adapted to rotate the direction of the deflected airflow output by the fan back to parallel with the central axis; The air outlet portion is arranged facing the air outlet end of the guide member and remains relatively fixed, and includes a plurality of air outlet fences uniformly distributed circumferentially around the central axis, and the air outlet fences participate in defining and forming an air outlet.

2. A handheld fan according to claim 1, characterized in that: The guide member includes a concentrically arranged guide inner ring and a guide outer ring. The guide blade includes a blade root suitable for connecting to the guide inner ring and a blade tip suitable for connecting to the guide outer ring. The guide blade twists radially from the blade root to the blade tip.

3. A handheld fan according to claim 2, characterized in that: The fan includes a plurality of blades uniformly distributed circumferentially around the central axis, and the blades are twisted radially, wherein one of the blades and the guide blades is twisted in a clockwise direction, and the other of the blades and the guide blades is twisted in a counterclockwise direction.

4. A handheld fan according to claim 3, characterized in that: The number of the guide blades is 1 to 2 times the number of the fan blades.

5. A handheld fan according to claim 3 or 4, characterized in that: The air outlet portion includes an inner air outlet ring and an outer air outlet ring arranged concentrically. The outer air outlet ring is plug-fitted or extended with the guide outer ring. At least part of the inner air outlet ring is suitable for forming a trumpet-shaped or eight-shaped guide platform, and the convergent end of the guide platform is arranged toward the guide member.

6. A handheld fan according to claim 5, characterized in that: The fan includes a motor suitable for driving the fan blades to rotate, and the flow guide member also includes a back plate. The flow guide inner ring and the back plate are enclosed to form a first cavity suitable for accommodating the motor.

7. A handheld fan according to claim 6, characterized in that: The air outlet portion includes a second cavity, and a cooling fin is provided at one axial end of the second cavity away from the guide member. The second cavity is suitable for installing a semiconductor cooling fin, and the hot end of the semiconductor cooling fin is arranged toward the guide member, and the cold end of the semiconductor cooling fin is in contact with the cooling fin.

8. A handheld fan according to claim 7, characterized in that: The air outlet outer ring and the air duct are assembled along the central axis, wherein: The air outlet outer ring includes a plurality of circumferentially evenly distributed card slots and a positioning slot arranged along the central axis. The inner peripheral wall of the air duct includes a plurality of buckles and a positioning ridge. The positioning slots and the positioning ridges are slidably matched to guide the card slots to engage with the buckles. Alternatively, the air outlet outer ring includes a plurality of mating grooves and a positioning groove arranged along the central axis direction, and the inner circumferential wall of the air duct includes a plurality of mating strips and a positioning rib, and the positioning grooves and the positioning ribs slide together to guide the mating grooves and the mating strips to be tightly mated.

9. The handheld fan according to claim 7, characterized in that: The bottom end of the grip is covered with an anti-slip pad, and the grip has a built-in battery and a control circuit board. The battery is arranged along the length direction of the grip, and the control circuit board is electrically connected to the motor and the semiconductor refrigeration plate. The control circuit board is electrically connected to several control buttons and a display screen, and the display screen is suitable for displaying the cold end temperature of the semiconductor refrigeration plate.

10. A handheld fan according to claim 9, characterized in that: The first shell comprises a first air cylinder and a first half shell, the second shell comprises a second air cylinder and a second half shell, and the first shell and the second shell are suitable for splicing and matching along the central axis, wherein: The first air duct and the second air duct are butt-jointed to form the air duct, the flow guide is arranged inside the first air duct, and the second air duct is provided with an air inlet; The first half shell and the second half shell are docked together to form the gripping portion. The first half shell includes a visible portion suitable for observing the display screen and a button hole suitable for exposing the control button. The visible portion and the button hole are arranged at one end adjacent to the first hair cylinder.

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