Bladeless fan

Abstract

The utility model provides a bladeless fan which comprises a shell, a fan assembly and an air duct, a cavity is defined in the shell, air inlets and air outlets are defined in the surface of the shell, the air inlets are evenly distributed in the bottom of the shell in the circumferential direction, the air outlets are formed in the front face of the shell and provided with sheet-shaped outlines, and the fan assembly comprises an air supply cylinder and a fan. The air supply cylinder is arranged close to the bottom of the shell and comprises an air inlet end and an air outlet end, the air inlet end communicates with the air inlet, the air duct is arranged in the cavity and suitable for communicating the air supply cylinder and the air outlet, the air duct comprises a gathering section, a straight section and an air outlet section which communicate in sequence, and the gathering section is suitable for communicating with the air outlet end and has a gathering trend; the size of the cross section of the straight section is constant all the time, and the air outlet section communicates with the air outlet. According to the utility model, the air channel comprising the furling section, the straight section and the air outlet section is arranged, so that the airflow generated by the fan can be effectively guided and accelerated in the air channel, and the energy loss and turbulence phenomenon of the airflow are reduced.

Description

Technical Field

[0001] This utility model belongs to the field of fan technology, and in particular relates to a bladeless fan. Background Technology

[0002] In the modern home appliance industry, bladeless fans are gradually gaining popularity among consumers due to their novel appearance and higher safety compared to traditional fans. However, current bladeless fan technology still has many limitations. First, the air ducts of traditional bladeless fans are generally short. Shorter ducts mean that the airflow acceleration and rectification process within the duct is insufficient, resulting in a rapid airflow. This rapid airflow is not only uncomfortable when blowing on the body, easily causing discomfort such as dryness on the skin and a feeling of pressure from the strong wind, but also, in certain scenarios, such as in bedrooms where a gentle breeze is needed or in quiet office environments, the rapid airflow can cause significant noise interference, affecting the user experience. Second, traditional bladeless fans mostly use a ring-shaped air outlet design. While this design has a certain uniqueness in appearance, it has obvious drawbacks from the perspective of actual airflow effect and space utilization. The ring-shaped air outlet results in a large amount of space being wasted in non-airflow areas, making the effective airflow area relatively small. A smaller effective air outlet area results in uneven airflow distribution, with some areas experiencing excessively high wind speeds and others too low, further impacting overall airflow quality and comfort. Furthermore, most existing bladeless fans lack a cooling module. In hot summers, relying solely on fan airflow only promotes sweat evaporation and heat removal through increased airflow, offering limited cooling effectiveness. For users in high-temperature environments or those with higher demands for coolness, this lack of effective cooling assistance fails to meet diverse usage needs, limiting the application of bladeless fans in more scenarios. Utility Model Content

[0003] In view of the shortcomings of the prior art, the purpose of this utility model is to provide a bladeless fan to meet the needs of users.

[0004] To achieve the above objectives, this utility model provides a bladeless fan, including...

[0005] A housing has an internal cavity and an air inlet and an air outlet defined on its surface. The air inlets are circumferentially distributed at the bottom of the housing, and the air outlets are located on the front of the housing, having a sheet-like profile.

[0006] A fan assembly includes an air supply duct and a fan disposed inside the air supply duct. The air supply duct is located near the bottom of the housing and includes an air inlet and an air outlet. The air inlet is connected to the air inlet port.

[0007] An air duct is disposed inside the cavity. The air duct is adapted to connect the air supply tube and the air outlet. The air duct includes a converging section, a straight section and an air outlet section connected in sequence. The converging section is adapted to connect to the air outlet end. The converging section has a converging tendency from the air outlet end toward the straight section. The cross-sectional dimension of the straight section is always constant. The air outlet section is connected to the air outlet.

[0008] Preferably, the extension length of the air duct is not less than 2 / 3 of the length of the housing, and the total extension length of the converging section and the straight section is not less than 1 / 3 of the length of the housing.

[0009] Preferably, the housing includes an air inlet section adapted to distribute the air inlet, and the air supply duct does not overlap with the air inlet section, which avoids airflow interference.

[0010] Preferably, the air outlet end is provided with a first air outlet vane and a second air outlet vane, both of which are curved, and the first air outlet vane and the second air outlet vane are spaced apart and staggered.

[0011] Preferably, the housing includes a first housing and a second housing, and the air duct is formed by at least a back shell and a front shell.

[0012] The first housing has the air outlet, the face shell has a ventilation opening suitable for connecting to the air outlet, the face shell and the first housing enclose a first sub-cavity, the first sub-cavity houses a first control circuit board suitable for controlling the start and stop of the fan, the first control circuit board is electrically connected to a control button, the control button is embedded in the first housing, or the control button is retractable relative to the first housing.

[0013] The second sub-cavity houses a battery and a second control circuit board, the second control circuit board being adapted to electrically connect the battery and a charging interface, the charging interface being embedded in the second housing.

[0014] Preferably, the air outlet section is provided with a cooling component, which includes a semiconductor refrigeration chip, with the cold end of the semiconductor refrigeration chip facing the air outlet.

[0015] Preferably, the air outlet is provided with a partition, and a cooling cavity suitable for accommodating the semiconductor cooling chip is provided on the side of the partition facing the air outlet; the cooling assembly also includes a heat-conducting sheet and a heat-insulating shell, the heat-insulating shell is horn-shaped, the heat-insulating shell includes a converging end and an open end, the converging end is assembled to the back shell, one side of the partition cooperates with the open end to clamp and fix the heat-conducting sheet, the hot end of the semiconductor cooling chip is attached to the heat-conducting sheet, and the heat-insulating shell defines an annular air outlet channel in the air outlet section.

[0016] Preferably, the outer periphery of the partition extends radially outward to form a first air guide grille, the outer periphery of the heat-conducting sheet extends radially outward to form a second air guide grille, and the outer periphery of the heat insulation shell extends radially outward to form a third air guide grille. The first air guide grille, the second air guide grille, and the third air guide grille are aligned and combined to form an air guide grille.

[0017] Preferably, the cold end of the semiconductor cooling chip is attached to the cooling plate, the cooling plate is adapted to seal the cooling cavity, and the cooling plate extends out of the air outlet.

[0018] Preferably, the air outlet is provided with several air guide grilles arranged along the airflow direction. The air guide grilles are adapted to divide the air outlet into several unit air outlets, and the distance between the air guide grilles and the back shell gradually shortens along the airflow direction.

[0019] Preferably, the air guide grille includes a first air guide section and a second air guide section. The first air guide section is arranged perpendicular to the airflow direction or the length direction of the housing. The second air guide section is arranged inclined downward from the first air guide section. The second air guide section is adapted to guide the airflow into the unit air outlet.

[0020] Preferably, the connection between the first and second air guide sections of the air guide fence is a smooth transition to reduce airflow turbulence.

[0021] The beneficial effects of this utility model are:

[0022] First, by setting up an air duct that includes a convergence section, a straight section, and an outlet section, the airflow generated by the fan can be effectively guided and accelerated within the air duct, reducing energy loss and turbulence within the air duct, thereby improving air outlet efficiency and ensuring stable and strong airflow output, providing users with a comfortable airflow experience over a wide range.

[0023] Second, by installing a cooling component in the air outlet section and utilizing the characteristics of semiconductor cooling chips, local cooling can be achieved while the fan is blowing air, meeting users' needs for cool air in hot environments, expanding the functional application scenarios of bladeless fans, and increasing the practicality and adaptability of the product.

[0024] Third, the combined effect of the double-layered air outlet vanes and the air guide grille makes the blown air more uniform and gentle. Specifically, the curved and interlaced first and second air outlet vanes initially adjust the airflow direction and speed distribution, while the air guide grille further divides the air outlet into multiple unit air outlets. Through its special shape and spacing variations, the airflow is more evenly distributed in all directions, reducing local wind speeds that are too high or too low, and effectively improving user comfort.

[0025] Fourth, the internal space is rationally divided into a first sub-cavity and a second sub-cavity, which respectively house different control circuit boards, batteries and charging interfaces, making the internal structure more compact and orderly, facilitating installation and maintenance and improving the product's portability. Attached Figure Description

[0026] Figure 1 is a schematic diagram of the structure of a bladeless fan provided in Embodiment 1.

[0027] Figure 2 is a cross-sectional schematic diagram of a bladeless fan provided in Embodiment 1.

[0028] Figure 3 is a schematic diagram of the air duct provided by this utility model.

[0029] Figure 4 is an exploded view of the wind turbine assembly provided by this utility model.

[0030] Figure 5 is a schematic diagram of the structure of a bladeless fan provided in Embodiment 2.

[0031] Figure 6 is a cross-sectional schematic diagram of a bladeless fan provided in Embodiment 2.

[0032] Figure 7 is a schematic diagram of the interior of the cavity provided in Example 2 (excluding air ducts, batteries, etc.).

[0033] Figure 8 is a schematic diagram of the structure of the first housing provided in Embodiment 2.

[0034] In the diagram: 100 housing, 101 first sub-cavity, 102 second sub-cavity, 103 first housing, 104 second housing, 105 air inlet section, 106 air inlet, 107 air outlet, 108 air guide grille, 109 first air guide section, 110 second air guide section, 111 partition, 112 first air guide grille, 113 second air guide grille, 114 third air guide grille, 200 fan assembly, 201 fan, 20 air supply duct. 2. First air outlet vane 203, second air outlet vane 204, air duct 300, front shell 301, back shell 302, vent 303, retractable section 304, straight section 305, air outlet section 306, semiconductor cooling chip 401, heat conduction plate 402, heat insulation shell 403, cold conduction plate 404, battery 501, first control circuit board 502, second control circuit board 503, control button 504, charging interface 505. Detailed Implementation

[0035] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] It should also be noted that, in order to avoid obscuring the present invention with unnecessary details, only the structures and / or processing steps closely related to the present invention are shown in the accompanying drawings, while other details that are not closely related to the present invention are omitted.

[0037] Additionally, it should be noted that the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0038] Example 1

[0039] like Figure 1-4 The bladeless fan includes a housing 100, a fan assembly 200, and an air duct 300. The housing 100 includes a first housing 103 and a second housing 104, and a cavity is defined inside the housing 100. The air duct 300 is formed by a back housing 302 and a front housing 301. The fan assembly 200 includes an air supply duct 202 and a fan 201 disposed inside the air supply duct 202. The first housing 103 has an air outlet 107, which is located on the front side of the housing 100 and has a sheet-like profile. The front housing 301 has a vent 303 adapted to connect to the air outlet 107. The front housing 301 and the first housing 103 enclose a first sub-cavity 101, which houses a first control circuit board 502 adapted to control the start and stop of the fan 201. The first control circuit board 502 is electrically connected to a control button 504, which is embedded in the first housing 103. The second sub-cavity 102 houses a battery 501 and a second control circuit board 503. The second control circuit board 503 is adapted to electrically connect the battery 501 and a charging interface 505, which is embedded in the second housing 104. The housing 100 includes an air inlet section 105 adapted to have circumferentially evenly distributed air inlets 106, with an air outlet located at the end away from the air inlets 106. An air supply duct 202 is disposed adjacent to the bottom of the housing 100, and the air supply duct 202 does not coincide with the air inlet section 105. The air supply duct 202 includes an air inlet end and an air outlet end, with the air inlet end communicating with the air inlets 106. The air duct 300 is disposed inside the cavity. The air duct 300 is adapted to connect the air supply duct 202 and the air outlet 107. The air duct 300 includes a converging section 304, a straight section 305 and an air outlet section 306 connected in sequence. The converging section 304 is adapted to connect to the air outlet end. The converging section 304 has a converging tendency from the air outlet end toward the straight section 305. The cross-sectional dimension of the straight section 305 is always constant. The air outlet section 306 is connected to the air outlet 107.

[0040] In this embodiment, the extension length of the air duct 300 is 2 / 3 of the length of the housing 100, and the total extension length of the converging section 304 and the straight section 305 is 1 / 3 of the length of the housing 100. This reasonable proportional relationship between the lengths of the air duct 300 and the housing 100, compared to existing technologies, extends the airflow path within the air duct 300. On the one hand, this helps to adjust and stabilize the flow state, making the airflow within the air duct 300 more orderly and effectively reducing the noise generated by the fan during operation. On the other hand, the longer acceleration process allows the airflow to be blown out of the air outlet 107 at a higher speed, thereby increasing the air delivery distance.

[0041] In this embodiment, the air outlet end is provided with a first air outlet vane 203 and a second air outlet vane 204, both of which are curved. The first air outlet vane 203 and the second air outlet vane 204 are spaced apart and staggered, which initially adjusts the airflow direction and speed distribution.

[0042] In this embodiment, the air outlet 107 is provided with a plurality of air guide grilles 108 arranged along the airflow direction. The air guide grilles 108 are adapted to divide the air outlet 107 into a plurality of unit air outlets 107. Along the airflow direction, the distance between the air guide grilles 108 and the back shell 302 gradually shortens. Due to the gradual constraint of space, appropriate resistance can be generated to the airflow, making the wind speed more balanced throughout the entire air outlet 107 range. This allows for a more precise distribution of the airflow in the air outlet 107, enabling the bladeless fan to provide comfortable airflow to the user over a larger angle and area, rather than just concentrating it in a small area directly in front of the air outlet 107. The air guide grilles 108 include a first air guide section 109 and a second air guide section 110. The first air guide section 109 is arranged perpendicular to the airflow direction or the length direction of the shell 100. The second air guide section 110 is inclined downward from the first air guide section 109 and is adapted to guide the airflow into the unit air outlet 107. The connection between the first air guide section 109 and the second air guide section 110 of the air guide grille 108 is made with a smooth transition to reduce airflow turbulence.

[0043] Example 2

[0044] like Figure 5-8 The bladeless fan described herein differs from Embodiment 1 in that the air outlet section 306 is provided with a cooling component, which includes a semiconductor cooling chip 401, with the cold end of the semiconductor cooling chip 401 facing the air outlet 107.

[0045] In this embodiment, the air outlet 107 is provided with a partition 111, and a cooling cavity suitable for accommodating the semiconductor cooling chip 401 is provided on the side of the partition 111 facing the air outlet 107. The cooling assembly also includes a heat-conducting sheet 402 and a heat-insulating shell 403. The heat-insulating shell 403 is horn-shaped and includes a converging end and an open end. The converging end is assembled to the back shell 302. The heat-conducting sheet 402 is clamped and fixed on one side of the partition 111 in conjunction with the open end. The hot end of the semiconductor cooling chip 401 is attached to the heat-conducting sheet 402. The heat-conducting sheet 402, the heat-insulating shell 403 and the back shell 302 also form a channel for wiring, so that the battery 501 can supply power to the semiconductor cooling chip 401. The first control circuit board 502 is suitable for controlling the start-up, shutdown and power of the semiconductor cooling chip 401. The heat insulation shell 403 defines an annular air outlet duct 300 in the air outlet section 306, forming an annular flow path for the airflow in the air outlet section 306. This allows the airflow to transition more smoothly from the air outlet 300 to the air outlet 107, reducing energy loss. The outer periphery of the partition 111 extends radially outward to form a first air guide grille 112, the outer periphery of the heat-conducting plate 402 extends radially outward to form a second air guide grille 113, and the outer periphery of the heat insulation shell 403 extends radially outward to form a third air guide grille 114. The first air guide grille 112, the second air guide grille 113, and the third air guide grille 114 are aligned and combined to form an air guide grille 108. The air guide grille 108 further divides the air outlet 107 into multiple unit air outlets 107, allowing the airflow to be more evenly distributed in all directions, reducing situations where the local wind speed is too high or too low. The cold end of the semiconductor cooling chip 401 is attached to the cooling conductor 404, which is suitable for sealing the cooling cavity and extends out of the air outlet 107.

[0046] The above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model.

Claims

1. A bladeless fan, characterized in that, include A housing has an internal cavity and an air inlet and an air outlet defined on its surface. The air inlets are circumferentially distributed at the bottom of the housing, and the air outlets are located on the front of the housing, having a sheet-like profile. A fan assembly includes an air supply duct and a fan disposed inside the air supply duct. The air supply duct is located near the bottom of the housing and includes an air inlet and an air outlet. The air inlet is connected to the air inlet port. An air duct is disposed inside the cavity. The air duct is adapted to connect the air supply tube and the air outlet. The air duct includes a converging section, a straight section and an air outlet section connected in sequence. The converging section is adapted to connect to the air outlet end. The converging section has a converging tendency from the air outlet end toward the straight section. The cross-sectional dimension of the straight section is always constant. The air outlet section is connected to the air outlet.

2. A bladeless fan according to claim 1, characterized in that, The extension length of the air duct is not less than 2 / 3 of the length of the housing, and the total extension length of the converging section and the straight section is not less than 1 / 3 of the length of the housing.

3. A bladeless fan according to claim 2, characterized in that, The housing includes an air inlet section adapted to distribute the air inlet, and the air supply duct does not overlap with the air inlet section.

4. A bladeless fan according to claim 3, characterized in that, The air outlet end is provided with a first air outlet vane and a second air outlet vane, both of which are curved. The first air outlet vane and the second air outlet vane are spaced apart and staggered.

5. A bladeless fan according to any one of claims 1-4, characterized in that, The housing includes a first housing and a second housing, and the air duct is formed by at least a back shell and a front shell, wherein: The first housing has the air outlet, the face shell has a ventilation opening suitable for communicating with the air outlet, the face shell and the first housing enclose a first sub-cavity, the first sub-cavity houses a first control circuit board suitable for controlling the start and stop of the fan, the first control circuit board is electrically connected to a control button, the control button is embedded in the first housing, or the control button is retractable relative to the first housing; The second sub-cavity houses a battery and a second control circuit board, the second control circuit board being adapted to electrically connect the battery and a charging interface, the charging interface being embedded in the second housing.

6. A bladeless fan according to claim 5, characterized in that, The air outlet section is equipped with a cooling component, which includes a semiconductor refrigeration chip, with the cold end of the semiconductor refrigeration chip facing the air outlet.

7. A bladeless fan according to claim 6, characterized in that, The air outlet is provided with a partition, and a cooling cavity suitable for accommodating the semiconductor cooling chip is provided on the side of the partition facing the air outlet; The cooling assembly also includes a heat-conducting sheet and a heat-insulating shell. The heat-insulating shell is horn-shaped and includes a converging end and an open end. The converging end is assembled to the back shell. One side of the partition cooperates with the open end to clamp and fix the heat-conducting sheet. The hot end of the semiconductor cooling chip is attached to the heat-conducting sheet. The heat-insulating shell defines an annular air outlet duct in the air outlet section.

8. A bladeless fan according to claim 7, characterized in that, The outer periphery of the partition extends radially outward to form a first air guide grille, the outer periphery of the heat-conducting sheet extends radially outward to form a second air guide grille, and the outer periphery of the heat insulation shell extends radially outward to form a third air guide grille. The first air guide grille, the second air guide grille, and the third air guide grille are aligned and combined to form an air guide grille.

9. A bladeless fan according to claim 5, characterized in that, The air outlet is provided with several air guide grilles arranged along the airflow direction. The air guide grilles are adapted to divide the air outlet into several unit air outlets. Along the airflow direction, the distance between the air guide grilles and the back shell gradually shortens.

10. A bladeless fan according to claim 9, characterized in that, The air guide grille includes a first air guide section and a second air guide section. The first air guide section is arranged perpendicular to the airflow direction or the length direction of the housing. The second air guide section is arranged downward from the first air guide section. The second air guide section is adapted to guide the airflow into the unit air outlet.

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