Neck-hung fan

Abstract

The utility model provides a neck hanging fan which comprises a neck wearing part and an air supply mechanism connected to the two ends of the neck wearing part, the air supply mechanism comprises a shell and a fan, the shell comprises an air outlet facing the neck of a human body, and an air supply cavity suitable for installing the fan and an air channel suitable for guiding airflow to the air outlet are formed in the shell. The air channel comprises at least one streamline inner side face which is a smooth and continuous curved face, the end, close to the air supply cavity, of the air channel is a first air supply section which is in butt joint communication with the air supply cavity through a communication opening, and the end, close to the draught fan, of the streamline inner side face participates in forming the first air supply section and has the trend of protruding outwards. The first air supply section is suitable for slow flow guide. Flow field distribution in the air channel is optimized by arranging the streamline inner side face, vortexes are reduced, resistance is reduced, local high air speed is reduced by arranging the first air supply section which tends to protrude outwards for slow flow guide, speed change is more stable, speed distribution is even, noise at the first air supply section, namely the highest flow speed position, is lowered, and noise reduction is facilitated. And user experience is improved.

Description

Technical Field

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

[0002] A neck-hanging fan is a portable cooling device designed to free up hands. In the prior art, it generally includes a neck-mounted part and an air supply mechanism connected to both ends of the neck-mounted part. The air duct and the air outlet are arranged along the length direction of the air supply mechanism, and the fan is arranged at the end away from the neck-mounted part. The air flow and wind pressure often show a decreasing trend in the air duct, so that the air volume and wind pressure of each air outlet are inconsistent, the air supply is uneven and stable, the air duct shrinks along the airflow direction, the air pressure changes drastically, and the noise is loud, which affects the user experience. 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 neck hanging blower to meet the needs of users.

[0004] To achieve the above-mentioned purpose, the utility model provides a neck-hanging blower, comprising a neck-mounted part and an air supply mechanism connected to both ends of the neck-mounted part, the air supply mechanism comprising a shell and a blower, the shell comprising an air outlet opened facing the human neck, the shell interior is provided with an air supply cavity suitable for installing the blower and an air duct suitable for guiding the airflow to the air outlet, the air duct comprises at least one streamlined inner side surface, the streamlined inner side surface is a smooth and continuous curved surface, one end of the air duct close to the air supply cavity is a first air supply section, the first air supply section is connected to the air supply cavity through a connecting port, one end of the streamlined inner side surface close to the blower participates in constituting the first air supply section and has a tendency to bulge outward, and the first air supply section is suitable for slow-speed flow diversion.

[0005] Preferably, the shell comprises a first shell and a second shell which are detachably connected, the first shell is arranged facing the human body, the air outlet is arranged on the upper surface of the first shell, and the extension direction perpendicular to the air duct is defined as the lateral direction, and along the gas flow direction, the lateral dimension of the air duct gradually shrinks.

[0006] Preferably, the first shell includes a first continuous curved surface, and the second shell includes a second continuous curved surface. The first continuous curved surface cooperates with the second continuous curved surface and separates a first space and a second space that are not connected inside the shell. The first space is suitable for installing a power supply and / or a control circuit board, and the second space is suitable for constituting the air supply chamber and the air duct.

[0007] Preferably, the air supply cavity has an arc-shaped circumferential structure, the circumferential structure is tangent to the shell at least at one point, and the circumferential structure includes a first end and a second end suitable for forming the connecting port, the first end has a guide section extending outward to the upper surface of the shell, and the second end is connected to the bottom surface of the air duct to form a smooth and continuous curved surface.

[0008] Preferably, the first shell includes a plurality of first partitions suitable for evenly spacing the air outlets, and the second shell includes a plurality of second partitions. The first partitions and the second partitions are docked and cooperated to form partitions, and the partitions and the lower surface of the air duct form a narrow opening, and the lateral dimension of the narrow opening gradually shrinks along the gas flow direction.

[0009] Preferably, the shell includes a mating shell assembled on the inner side of the second shell, the mating shell is arranged above the second continuous curved surface and is suitable for constraining the lateral dimension of the air duct, and the mating shell includes a mating side panel suitable for constituting the streamlined inner side surface.

[0010] As a preferred embodiment: the mating shell includes a mating top plate and a mating bottom plate arranged on the upper and lower sides of the mating side plate, the mating top plate is suitable for being arranged close to the first shell and the second shell and exposing the air outlet, the mating bottom plate is arranged close to the bottom surface of the air duct, and an avoidance groove for the first partition plate and / or the second partition plate to pass through is formed at the connection between the mating top plate and the mating side plate.

[0011] As a preferred embodiment: the air supply chamber is arranged at an end of the shell away from the neck-mounted part, the first shell and the second shell are respectively provided with a first air inlet and a second air inlet corresponding to the air supply chamber, the fan comprises a blade assembly and a drive motor, the blade assembly comprises an impeller disk, a plurality of first blades and a plurality of second blades, the impeller disk has a central axis, the impeller disk is suitable for being coaxially connected to the output shaft of the drive motor, the impeller disk comprises a first surface and a second surface facing the first air inlet and the second air inlet respectively, the first blades and the second blades are respectively evenly arranged on the first surface and the second surface around the central axis in the same direction.

[0012] Preferably, the impeller disk is provided with ventilation holes, the ventilation holes are suitable for connecting the first surface and the second surface, and the second blades are correspondingly arranged between two adjacent first blades.

[0013] Preferably, the second housing is formed with a bearing device for supporting the output shaft and a second air inlet surrounding the bearing device, and an outer cover of the second air inlet is provided with a dust cover, and an air inlet gap is provided between the dust cover and the second air inlet.

[0014] The beneficial effects of the utility model are:

[0015] (1) By setting a streamlined inner side surface, the flow field distribution in the air duct is optimized, eddy currents are reduced, and resistance is lowered. By setting a first air supply section with a tendency to bulge outward to slow down the flow, the local high wind speed is reduced, the speed change is smoother, and the speed distribution is uniform. At the same time, it is beneficial to reduce the noise in the first air supply section, which is the place with the highest flow rate, and improve the user experience.

[0016] (2) The first blade and the second blade facing the first air inlet and the second air inlet are arranged to improve the air supply efficiency, and the air vents suitable for connecting the first surface and the second surface can further reduce the generation of vortex in the air supply cavity, thereby achieving the effect of increasing speed and reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The utility model provides a structural schematic diagram of a neck hanging fan.

[0018] Figure 2 The utility model is an exploded schematic diagram of a neck hanging fan provided by the utility model.

[0019] Figure 3 The utility model is a schematic cross-sectional view of a housing.

[0020] Figure 4 This is a structural schematic diagram of the first shell provided by the utility model.

[0021] Figure 5 This is a structural schematic diagram of the second shell provided by the utility model.

[0022] Figure 6 This is a structural schematic diagram of the matching shell provided by the utility model.

[0023] Figure 7 This is a structural schematic diagram of the fan provided by the utility model.

[0024] In the figure, the neck-mounted part 200, the fan 101, the first shell 102, the second shell 103, the air outlet 104, the first continuous curved surface 105, the second continuous curved surface 106, the first space 107, the power supply 108, the control circuit board 109, the air supply chamber 110, the air duct 111, the matching shell 112, the matching side plate 113, the matching top plate 114, the matching bottom plate 115, the connecting port 116, the first air supply section 117, the first end 118, the second end 119, the first partition plate 120, the second partition plate 121, the avoidance groove 122, the first air inlet 123, the bearing device 124, the second air inlet 125, the dust cover 126, the blade assembly 127, the drive motor 128, the output shaft 129, the impeller disk 130, the first blade 131, the second blade 132, the ventilation hole 133, and the guide section 134. DETAILED DESCRIPTION

[0025] 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.

[0026] It should also be noted 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.

[0027] 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 other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus.

[0028] like Figure 1-7The present invention discloses a neck hanging fan 101, comprising a neck wearing part 200 and an air supply mechanism 100 connected to both ends of the neck wearing part 200, wherein the air supply mechanism 100 comprises a housing and a fan 101, wherein the housing comprises a first housing 102 and a second housing 103 which are detachably connected, wherein the first housing 102 is arranged facing the human body, wherein the upper surface of the first housing 102 is provided with an air outlet 104 facing the human neck, wherein the first housing 102 comprises a first continuous curved surface 105, wherein the second housing 103 comprises a second continuous curved surface 106, wherein the first continuous curved surface 105 cooperates with the second continuous curved surface 106 and separates a first space 107 and a second space which are not connected inside the housing, wherein the first space 107 is suitable for installing a power supply 108 and / or a control circuit board 109, wherein the second space is suitable for forming an air supply chamber 110 and an air duct 111, wherein the air supply chamber 110 is arranged at one end of the housing away from the neck wearing part 200. The air supply chamber 110 is suitable for installing the fan 101, and the air duct 111 is suitable for directing the airflow to the air outlet 104. The extension direction perpendicular to the air duct 111 is defined as the lateral direction. The housing includes a matching housing 112 assembled on the inner side of the second housing 103. The matching housing 112 is arranged above the second continuous curved surface 106 and is suitable for constraining the lateral dimension of the air duct 111. Along the gas flow direction, the lateral dimension of the air duct 111 gradually shrinks, which is conducive to making the wind speed stable and the air supply balanced. The matching housing 112 includes a matching side plate 113 and a matching top plate 114 and a matching bottom plate 115 arranged on the upper and lower sides of the matching side plate 113. The matching side plate 113 is suitable for forming a streamlined inner side surface of the air duct 111. The streamlined inner side surface is a smooth and continuous curved surface, which optimizes the flow field distribution in the air duct, reduces eddy currents, reduces resistance, reduces losses, and is conducive to maintaining the air flow speed and air pressure. The matching top plate 114 is suitable for being arranged close to the first housing 102 and the second housing 103 and exposing the air outlet 104, and the matching bottom plate 115 is arranged close to the bottom surface of the air duct 111. One end of the air duct 111 close to the air supply chamber 110 is the first air supply section 117, and the first air supply section 117 is connected to the air supply chamber 110 through the connecting port 116. The airflow has the maximum air pressure and flow rate after escaping from the connecting port 116. The streamlined inner side surface close to the end of the fan 101 participates in the formation of the first air supply section 117 and has a tendency to bulge outward. The space of the first air supply duct is expanded compared to the connecting port 116. The first air supply section 117 is suitable for slow-speed diversion, reducing local high wind speeds, reducing vortices, and reducing noise.

[0029] In this embodiment, the air supply chamber 110 has an arc-shaped circumferential structure, which is tangent to the shell at three locations, and includes a first end 118 and a second end 119 suitable for forming a connecting port 116. The first end 118 has a guide section 134 extending outward to the upper surface of the shell, and the second end 119 is connected to the bottom surface of the air duct 111 to form a smooth and continuous curved surface, which is beneficial to reducing the air supply resistance.

[0030] In this embodiment, the first housing 102 includes a plurality of first baffles 120 suitable for evenly spacing the air outlets 104, the second housing 103 includes a plurality of second baffles 121, the first baffles 120 and the second baffles 121 are butt-jointed to form a baffle, and the mating housing 112 includes a mating top plate 114 and a mating side plate 113 at the connection formed with an avoidance groove 122 for the first baffle 120 and / or the second baffle 121 to pass through. The baffle and the lower surface of the air duct 111 form a bottleneck, and the lateral dimension of the bottleneck gradually shrinks along the gas flow direction.

[0031] In this embodiment, the fan 101 includes a blade assembly 127 and a drive motor 128, and the drive motor 128 includes an output shaft 129. The first housing 102 is provided with a first air inlet 123 corresponding to the air supply cavity 110, and the second housing 103 is formed with a bearing device 124 supporting the output shaft 129 and a second air inlet 125 surrounding the bearing device 124, and a dust cover 126 is provided on the outer side of the second air inlet 125, and an air inlet gap is provided between the dust cover 126 and the second air inlet 125. The blade assembly 127 includes an impeller disk 130, a plurality of first blades 131 and a plurality of second blades 132. The impeller disk 130 has a central axis. The impeller disk 130 is suitable for being coaxially connected to the output shaft 129. The impeller disk 130 includes a first surface and a second surface facing the first air inlet 123 and the second air inlet 125 respectively, and a ventilation hole 133 suitable for connecting the first surface and the second surface. The first blades 131 and the second blades 132 are respectively evenly arranged on the first surface and the second surface around the central axis in the same direction, and the second blades 132 are correspondingly arranged between two adjacent first blades 131.

[0032] The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model.

Claims

1. A neck hanging fan, comprising a neck wearing part and an air supply mechanism connected to both ends of the neck wearing part, the air supply mechanism comprising a shell and a fan, the shell comprising an air outlet facing the neck of a human body, an air supply cavity suitable for installing the fan and an air duct suitable for guiding the airflow to the air outlet are arranged inside the shell, characterized in that: The air duct includes at least one streamlined inner side surface, and the streamlined inner side surface is a smooth and continuous curved surface. The end of the air duct close to the air supply cavity is a first air supply section, and the first air supply section is connected to the air supply cavity through a connecting port. The end of the streamlined inner side surface close to the fan participates in the formation of the first air supply section and has a tendency to bulge outward. The first air supply section is suitable for slow-speed flow diversion.

2. The neck hanging fan according to claim 1, characterized in that: The shell includes a first shell and a second shell that are detachably connected. The first shell is arranged to face the human body. The air outlet is arranged on the upper surface of the first shell. The extension direction perpendicular to the air duct is defined as the lateral direction. Along the gas flow direction, the lateral dimension of the air duct gradually shrinks.

3. The neck hanging fan according to claim 2, characterized in that: The first shell includes a first continuous curved surface, and the second shell includes a second continuous curved surface. The first continuous curved surface cooperates with the second continuous curved surface and separates a first space and a second space that are not connected inside the shell. The first space is suitable for installing a power supply and / or a control circuit board, and the second space is suitable for forming the air supply chamber and the air duct.

4. The neck hanging fan according to claim 3, characterized in that: The air supply cavity has an arc-shaped circumferential structure, which is tangent to the shell at least at one point, and includes a first end and a second end suitable for forming the connecting port, the first end has a guide section extending outward to the upper surface of the shell, and the second end is connected to the bottom surface of the air duct to form a smooth and continuous curved surface.

5. The neck hanging fan according to claim 4, characterized in that: The first shell includes a plurality of first partitions suitable for evenly spacing the air outlets, and the second shell includes a plurality of second partitions. The first partitions and the second partitions are connected and cooperated to form a partition, and the partitions and the lower surface of the air duct form a narrow opening. Along the gas flow direction, the lateral dimension of the narrow opening gradually shrinks.

6. The neck hanging fan according to claim 5, characterized in that: The shell includes a matching shell assembled on the inner side of the second shell, the matching shell is arranged above the second continuous curved surface and is suitable for restricting the lateral dimension of the air duct, and the matching shell includes a matching side plate suitable for forming the streamlined inner side surface.

7. The neck hanging fan according to claim 6, characterized in that: The mating shell includes a mating top plate and a mating bottom plate which are arranged on the upper and lower sides of the mating side plate. The mating top plate is suitable for being arranged close to the first shell and the second shell and exposing the air outlet. The mating bottom plate is arranged close to the bottom surface of the air duct. An avoidance groove is formed at the connection between the mating top plate and the mating side plate for the first partition plate and / or the second partition plate to pass through.

8. A neck hanging fan according to any one of claims 2 to 7, characterized in that: The air supply chamber is arranged at an end of the shell away from the neck-mounted part, and the first shell and the second shell are respectively provided with a first air inlet and a second air inlet corresponding to the air supply chamber, and the fan includes a blade assembly and a drive motor, and the blade assembly includes an impeller disk, a plurality of first blades and a plurality of second blades, and the impeller disk has a central axis, and the impeller disk is suitable for being coaxially connected to the output shaft of the drive motor, and the impeller disk includes a first surface and a second surface facing the first air inlet and the second air inlet respectively, and the first blades and the second blades are respectively evenly arranged on the first surface and the second surface around the central axis in the same direction.

9. The neck hanging fan according to claim 8, characterized in that: The impeller disk is provided with ventilation holes, and the ventilation holes are suitable for connecting the first surface and the second surface. The second blades are correspondingly arranged between two adjacent first blades.

10. The neck hanging fan according to claim 9, characterized in that: The second housing is formed with a bearing device supporting the output shaft and a second air inlet surrounding the bearing device. The outer cover of the second air inlet is provided with a dust cover, and an air inlet gap is provided between the dust cover and the second air inlet.

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