Bladeless fan

Abstract

The application discloses a bladeless fan, and relates to the technical field of fans, wherein the bladeless fan comprises a shell and a fan, the shell is formed with a containing cavity and an annular air duct, the containing cavity is communicated with the annular air duct, the shell is provided with a air outlet, and the air outlet is communicated with the annular air duct and the outside. The fan is arranged in the shell and located in the containing cavity, and an air outlet of the fan is arranged towards the annular air duct. The shell is provided with a hook opening.

Description

Technical Field

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

[0002] A handheld fan is a small, battery-powered fan that can be held in the palm of your hand. It uses a DC motor to drive the fan blades to rotate and generate airflow to cool you down. Its structure typically includes a shell, fan blades, motor, battery, and buttons. It is small in size and lightweight, can be carried around or placed on a desktop, and is charged via a USB interface. It is suitable for use in outdoor, commuting, and office settings.

[0003] Most portable fans are either handheld or neck-mounted. Handheld fans cannot free your hands and can cause wrist discomfort after prolonged use; neck-mounted fans concentrate all the weight on the neck, which can easily cause neck pain, fatigue and pressure, and are also prone to stuffiness and sweating, requiring frequent cleaning. They are also noisier when used near the ear, resulting in a poor user experience. Utility Model Content

[0004] This application proposes a bladeless fan, which aims to provide a bladeless fan that can be suspended at a fixed point, thereby expanding the application scenarios and convenience of the fan.

[0005] One embodiment of this application provides a bladeless fan, comprising: The housing has a receiving cavity and an annular air duct, the receiving cavity is connected to the annular air duct, and the housing is provided with an air outlet, which is connected to the annular air duct and the outside. A fan is disposed in the housing and located within the receiving cavity, with the air outlet of the fan facing the annular air duct; The housing has a hook opening. Attached Figure Description

[0006] To more clearly illustrate the technical solutions in the embodiments or prior art of this application, the drawings used in the description of the embodiments or prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0007] Figure 1 This is a schematic diagram of the structure of an embodiment of the bladeless fan provided in this application; Figure 2 A cross-sectional view of an embodiment of the bladeless fan provided in this application; Figure 3 This is an exploded structural diagram of an embodiment of the bladeless fan provided in this application.

[0008] Explanation of icon numbers: 100. Bladeless Fan; 1. Housing; 11. Front Housing; 11a. Charging Port; 12. Rear Housing; 1a. Reception Chamber; 1b. Annular Air Duct; 1c. Air Outlet; 1e. Hook Opening; 1f. Annular Space; 1g. Air Inlet; 2. Fan; 2a. Air Outlet; 3. Dust Cover; 3a. Air Inlet Hole; 4. Main Control Board; 5. Control Keys; 51. Power Switch; 52. Fan Speed ​​Adjustment Key; 6. Display Screen; 7. Battery; 8. Mounting Bracket. Detailed Implementation

[0009] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of several embodiments. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0010] It should be noted that if multiple embodiments of this application involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0011] Furthermore, if multiple embodiments of this application involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the use of "and / or" or "and / or" throughout the text implies three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed in this application.

[0012] A handheld fan is a small, battery-powered fan that can be held in the palm of your hand. It uses a DC motor to drive the fan blades to rotate and generate airflow to cool you down. Its structure typically includes a shell, fan blades, motor, battery, and buttons. It is small in size and lightweight, can be carried around or placed on a desktop, and is charged via a USB interface. It is suitable for use in outdoor, commuting, and office settings.

[0013] Most portable fans are handheld or neck-mounted. In daily commutes, outdoor work, and sedentary office settings, portable fans are a common device for relieving stuffiness due to their immediate cooling effect. Currently, the mainstream products on the market are mainly divided into handheld and neck-mounted types. However, both have significant drawbacks in actual use, failing to meet users' needs for a comfortable, convenient, and low-interference cooling experience. Handheld fans typically consist of a fan body and a handle, requiring users to continuously hold the device to adjust the airflow angle. This design not only fails to free the hands but also concentrates the weight of the handle on the palm and wrist, causing prolonged holding to keep the wrist in a bent position, leading to wrist muscle fatigue, soreness, and even exacerbating tendonitis and other strain problems. This is particularly unfriendly to the elderly, children, and users with weak hand strength. Furthermore, some handheld fans, in pursuit of portability, have reduced size, resulting in insufficient battery life and frequent charging, further reducing ease of use.

[0014] While neck-hook fans free up your hands by suspending the device around your neck with a cord or curved stand, they still have several drawbacks: First, the entire weight is concentrated on the sides and back of the neck, which can cause continuous pressure on the neck muscles with prolonged wear, leading to neck pain, stiffness, and even affecting the physiological curvature of the cervical spine. This is especially true for users with pre-existing cervical strain, exacerbating their symptoms. Second, the stand or fan body of a neck-hook fan is usually in direct contact with the skin of the neck, and the air circulation in the neck area is relatively poor. The localized heat generated by the device during operation can rub against the skin. The combined heat dissipation from the skin can easily lead to stuffiness and sweating on the neck. When sweat comes into contact with the device, it can easily breed bacteria and produce odors, requiring frequent disassembly and cleaning, which increases the user's maintenance costs. In addition, the blades or motors of most neck-hook fans are placed close to the ears, and the mechanical noise generated during operation is amplified near the ears. Especially in quiet environments, the noise can easily interfere with the user's attention and even cause ear discomfort. At the same time, the fixed airflow angle of some neck-hook fans cannot be flexibly adjusted according to the user's needs, making it difficult to accurately cover the core cooling areas such as the face and neck, thus limiting the cooling effect.

[0015] To address the aforementioned problems, this application proposes a bladeless fan 100 to solve the technical issues mentioned above.

[0016] Please see Figure 1 In one embodiment of this application, the bladeless fan 100 includes a housing 1 and a fan 2. The housing 1 forms a receiving cavity 1a and an annular air duct 1b, the receiving cavity 1a being connected to the annular air duct 1b. The housing 1 is provided with an air outlet 1c, which connects the annular air duct 1b to the outside. The fan 2 is disposed in the housing 1 and located within the receiving cavity 1a, with the air outlet 2a of the fan 2 facing the annular air duct 1b. The housing 1 also has a hook opening 1e.

[0017] Understandably, during the operation of the bladeless fan 100, its core operating logic revolves around the generation, guidance, and output of airflow, with various structures working together to achieve efficient cooling. First, when the bladeless fan 100 starts, the fan 2, electrically connected to the main control board 4, begins to operate. Since the fan 2 is located within the housing cavity 1a of the casing 1, and its outlet 2a clearly faces the annular duct 1b, the fan 2 draws in outside air from the inlet 1g at the end of the casing 1 furthest from the annular duct 1b. After being pressurized and accelerated by the internal power mechanism of the fan 2, a high-speed airflow is formed and ejected from the outlet 2a of the fan 2. Next, the high-speed airflow enters the annular duct 1b, which is connected to the housing cavity 1a. The annular duct 1b is arranged around the annular space 1f of the casing 1, and its curved channel structure guides the high-speed airflow, causing it to flow stably along the inner wall of the annular duct 1b. During this process, the airflow direction and speed distribution are further optimized due to the constraint of the annular duct 1b. Finally, the high-speed airflow in the annular duct 1b is output to the outside through the air outlet 1c on the housing 1 that connects the annular duct 1b to the outside. If the air outlet 1c contains multiple air supply sections, the airflow will be evenly distributed to each air supply section, and finally act on the user in a gentle and evenly distributed airflow pattern to achieve a cooling effect. At the same time, the hook port 1e on the housing 1 can hang the fan on a fixed object to ensure that the fan is stable in position during operation and does not affect the normal generation and output of airflow.

[0018] This application provides a hook opening 1e on one side of the fan housing 1, allowing it to be hung at a fixed point on an object. This frees the user's hands and avoids the pressure of the fan hanging around the neck, thus optimizing the user experience. Specifically, the bladeless fan 100 includes a housing 1 and a fan 2. The housing 1 forms a receiving cavity 1a and an annular air duct 1b, which are connected. The housing 1 has an air outlet 1c, which connects the annular air duct 1b to the outside and is used to deliver the high-speed airflow within the annular air duct 1b to the user. The fan 2 is located inside the housing 1, with its air outlet 2a facing the annular air duct 1b. When the bladeless fan 100 is working, the fan 2 starts, and its air outlet 2a generates a high-speed airflow that enters the annular air duct 1b. Because the annular air duct 1b has a curved structure, the high-speed airflow moves closely along the inner wall of the annular air duct 1b, thereby generating a gentle and more uniform airflow at the air outlet 1c. The hook opening 1e on one side of the housing 1 can be directly hung on an object, thereby fixing the bladeless fan 100, avoiding fatigue caused by prolonged holding, and optimizing the user experience.

[0019] In one embodiment, to achieve lightweighting of the bladeless fan 100, reduce its material consumption, and improve the product's aesthetics, the housing 1 has a first side and a second side arranged opposite to each other, with the air outlet 1c located on the first side; the housing 1 has an annular space 1f, which runs through the first side and the second side; an annular air duct 1b is arranged around the annular space 1f. In terms of lightweighting and material reduction, the annular space 1f uses a hollow structure to replace part of the material of the traditional solid housing 1. While ensuring the overall support strength of the housing 1, this significantly reduces the amount of raw materials required to manufacture the housing 1, thus reducing the overall weight of the product, meeting the requirements of lightweight design, and reducing material consumption, thereby lowering production and material costs. Furthermore, the through structure of the annular space 1f does not require additional complex support components, avoiding weight and material redundancy caused by structural redundancy.

[0020] From an aesthetic perspective, the annular space 1f creates a transparent, circular visual effect. Combined with the annular air duct 1b surrounding it, this makes the overall lines of the casing 1 more concise and streamlined. Especially when the fan is activated and airflow is output from the first side air outlet 1c, the annular space 1f creates a visual sense of extended airflow channels, enhancing the modernity and sophistication of the product design and avoiding the potentially bulky and rigid appearance of a solid casing 1. Furthermore, the structure of the annular space 1f, which extends to both sides, provides potential optimization space for airflow. Its hollow shape reduces airflow resistance inside the casing 1, working in conjunction with the annular air duct 1b to improve airflow transmission efficiency, balancing design advantages with functional practicality.

[0021] Furthermore, control key 5 and air outlet 1c are both located on the first side of housing 1. For details, please refer to further documentation. Figure 1 From a user experience perspective, the air vent 1c is the core area where users can directly perceive the airflow output. Control button 5, located on the same side as the air vent 1c, allows users to adjust parameters near the airflow area without having to search for it on the other side. Users can directly and simultaneously perceive the airflow and adjust controls through hand gestures. This is especially beneficial when the fan is suspended or placed on a desktop, as the user's line of sight and operating range are more focused, significantly reducing blind spots and improving ease of use. From a functional perspective, the airflow state of the air vent 1c is directly related to the adjustment commands of control button 5. The same-side design allows users to more intuitively judge whether the adjustment of control button 5 meets expectations by observing changes in the airflow of the air vent 1c, reducing the cumbersome process of having to switch perspectives to confirm the effect after adjustment due to the button and vent being on opposite sides. In addition, from the perspective of space utilization of housing 1, the annular air duct 1b is set around the annular space 1f. The air outlet 1c and the annular space 1f are integrated on the first side. The control key 5 is integrated on this side, which can avoid creating an additional button area on the second side and destroying the structural integrity of housing 1. At the same time, it makes the functional partitions on both sides of housing 1 clearer, taking into account both practicality and design consistency.

[0022] In one embodiment of this application, the hook opening 1e is connected to the annular space 1f. For further details, please refer to [the relevant documentation / reference needed]. Figure 2 Regarding the optimization of the mounting position, the hook opening 1e connects to the annular space 1f, allowing the suspension position to fall within the annular space 1f. On the one hand, this fully utilizes the hollow area of ​​the annular space 1f, avoiding the need for additional mounting structures on the outside of the housing 1 that would disrupt the overall aesthetic integrity. On the other hand, the annular space 1f connects the first and second sides of the housing 1, and its internal space is relatively regular and has a certain capacity. When suspended, the hook or mounting component can be embedded in the annular space 1f, reducing the impact of external protruding parts on the overall clean shape of the fan. At the same time, the surrounding structure of the annular space 1f can provide a certain degree of restraint for the mounting component, preventing the fan from becoming unstable due to force displacement during mounting.

[0023] In terms of preventing detachment, the hook opening 1e has a greater distance between the first end and the fan 2 than the second end, creating an inclined angle. This inclined design forms a hidden guide structure inside the hook opening 1e, which is narrower on the outside and wider on the inside. When the fan is suspended from the fixing component through the hook opening 1e, the fixing component will naturally fit against the inclined inner wall of the hook opening 1e. Because the first end is farther from the fan 2 and the space is relatively open, the fixing component is not easy to detach from the narrower second end after being embedded. Even if the fan generates outward pulling force due to slight shaking during use, the inclined inner wall can form a reverse resistance, effectively preventing accidental detachment from the suspension point. Compared with the vertical hook opening 1e, this greatly improves the stability and safety of suspension use, and is especially suitable for scenarios where the fan is mounted at a high place or is susceptible to slight impacts.

[0024] To further optimize the uniformity of airflow, in one optional embodiment, the air outlet 1c is provided with multiple air supply sections connected to the annular duct 1b. This offers significant advantages in terms of airflow output and user experience, and forms a highly efficient synergy with the structure of the annular duct 1b surrounding the annular space 1f. Regarding airflow output optimization, multiple air supply sections can divert and evenly distribute the high-speed airflow within the annular duct 1b, avoiding the problems of airflow concentration and narrow airflow range that might occur with a single air supply section. The annular duct 1b forms an annular airflow channel around the annular space 1f, and the multiple air supply sections are correspondingly arranged along the annular duct 1b, allowing airflow to be output simultaneously from different air supply sections. This results in a wider airflow coverage area and a more balanced airflow intensity across each air supply section, preventing localized excessively strong or weak airflow and improving the overall uniformity of cooling.

[0025] From a user experience perspective, the multi-airflow design can adapt to the needs of different scenarios. For example, when the fan is suspended high indoors, multiple airflow sections can achieve multi-zone airflow in the vertical or horizontal directions, meeting the cooling needs of multiple people sharing or large spaces. If the user uses it at close range, the evenly distributed airflow sections can make the airflow act more gently on the human body, reducing the discomfort caused by a single strong airflow. In addition, the connection design between multiple airflow sections and the annular duct 1b can further utilize the surrounding structure of the annular duct 1b to make the airflow more stably distributed to each airflow section during transmission, avoiding airflow loss.

[0026] To achieve internal and external circulation of high-speed airflow, the housing 1 is provided with an air inlet 1g at the end away from the annular air duct 1b. For details, please refer to further information. Figure 2 and combined Figure 3 The bladeless fan 100 also includes a dust cover 3, which covers the air inlet 1g and has multiple air inlet holes 3a.

[0027] A dust cover 3 is installed at the air inlet 1g. Its core function is to provide a protective barrier for the high-speed airflow circulation of the bladeless fan 100, ensuring efficient airflow circulation. From an equipment protection perspective, the air inlet 1g serves as the entry point for outside air into the housing 1. The dust cover 3 effectively intercepts dust, hair, debris, and other impurities in the air, preventing these foreign objects from entering the fan 2 or the annular duct 1b with the airflow, thus extending the overall service life of the product. From an airflow circulation perspective, the dust cover 3's shielding effect does not obstruct airflow; instead, its structural design ensures smooth airflow. Its placement, matching the air inlet 1g's distance from the annular duct 1b, provides a clean channel for the fan 2 to continuously draw in outside air, ensuring stable high-speed airflow circulation.

[0028] Furthermore, the addition of multiple air inlets 3a on the dust cover 3 further optimizes the airflow circulation efficiency and dustproof effect. On the one hand, multiple air inlets 3a can significantly increase the airflow area, reducing air resistance compared to a single air inlet 3a. This ensures that outside air can quickly and sufficiently enter the housing 1 through the air inlets 3a, meeting the air demand of the fan 2 and thus ensuring the stability of the high-speed airflow output by the fan 2. This avoids problems such as weakened airflow circulation and reduced air delivery intensity due to insufficient air intake. On the other hand, the distributed layout of multiple air inlets 3a can refine the airflow path, allowing air to enter more evenly and reducing local airflow congestion. At the same time, the small-diameter air inlets 3a can further enhance the filtration effect on fine impurities, improving dustproof precision while ensuring air intake efficiency, thus achieving both efficient air intake and precise dustproofing.

[0029] To control the bladeless fan 100, the bladeless fan 100 also includes a main control board 4. For details, please refer to further documentation. Figure 3The main control board 4 is located in the housing 1 and within the accommodating cavity 1a, and is electrically connected to the fan 2. First, the main control board 4 can receive user operation commands in real time via a circuit connection with the control key 5 in the housing 1. When the user presses the control key 5, the control key 5 sends a corresponding electrical signal to the main control board 4. Second, the chip inside the main control board 4 analyzes and processes the received electrical signal, generating a corresponding control signal according to a preset program. Subsequently, the main control board 4 transmits the processed control signal to the fan 2, which is electrically connected to it, via wires, achieving precise control of the fan 2. Simultaneously, the main control board 4 can also receive real-time operating status signals from the fan 2. If an abnormality is detected in the fan 2, a preset mechanism can be used for protection, ensuring stable and safe operation of the fan. The entire control process relies on the installation space of the accommodating cavity 1a to achieve a regular circuit layout, avoiding external interference from affecting control accuracy.

[0030] In an optional implementation, the control key 5 includes a power switch 51 and a fan speed adjustment key 52. ​​For more details, please refer to the following documentation. Figure 1 The power switch 51 is a push-button switch, with one end of the power switch 51 exposed outside the housing 1. When the user presses the power switch 51, the fan 2 starts working; when the user presses the power switch 51 again, the fan 2 stops working. Furthermore, the bladeless fan 100 proposed in this application can also adjust the wind speed to match different user needs. The wind speed adjustment key 52 has a sliding structure; when the user pushes the wind speed adjustment key 52 to slide, it means switching from the current speed to another speed, correspondingly reducing or increasing the wind speed of the fan 2.

[0031] From the perspective of energy consumption and equipment protection, multi-speed adjustment enables on-demand energy consumption: at low wind speed settings, the fan 2 operates at a lower speed and consumes less power, which significantly reduces energy consumption compared to running at high wind speed throughout the entire range, meeting energy conservation requirements. Moreover, the low wind speed setting also causes less wear and tear on the fan 2, which helps extend its service life.

[0032] In one embodiment of this application, the main control board 4 is equipped with a display screen 6, which is exposed on the first side of the housing 1. From the perspective of information acquisition, the display screen 6 can intuitively present the fan's operating status processed by the main control board 4 to the user in real time, such as the current fan speed, on / off status, remaining timer, and even fault prompts. This allows the user to clearly grasp the core information without having to indirectly judge the fan's operating status by sensing airflow intensity, thus avoiding misoperation due to information opacity. From the perspective of operation feedback, when the user adjusts the fan speed or switches modes using the control keys 5 on the first side of the housing 1, the display screen 6 will synchronously update the corresponding parameters, forming an instant closed loop. This allows the user to clearly know that the adjustment command has been received and executed by the main control board 4, enhancing the certainty and sense of security of the operation, which is especially user-friendly for elderly people, children, and other users who are sensitive to operation feedback.

[0033] The bladeless fan 100 provides the necessary power to operate electronic components such as the fan 2, main control board 4, and display screen 6. It also includes a battery 7, which is housed in the housing 1 and located within the receiving cavity 1a. The battery 7 is electrically connected to the fan 2. From a flexibility perspective, freed from the constraints of mains cables, users are no longer limited by the location of the power source and can move the product freely according to their needs. Simultaneously, the absence of tangled cables makes the fan's overall appearance more streamlined, contributing to a clean and tidy user environment along with the annular space 1f and multiple airflow sections. Combined with the interactive functions of the main control board 4 and display screen 6, users can enjoy wireless convenience while still accurately controlling the fan's operating status, balancing practicality, safety, and aesthetics.

[0034] The housing 1 proposed in this application is mainly composed of two parts: a front housing 11 and a rear housing 12. The first side of the aforementioned housing 1 is located on the front housing 11. The front housing 11 is also provided with a charging port 11a. For details, please refer to further reference. Figure 1 The battery 7 can be charged through the charging port 11a, enabling multiple charge-discharge cycles. To facilitate the installation and fixation of the fan 2, a mounting bracket 8 is provided inside the housing 1. The mounting bracket 8 adopts a contoured structure similar to the shape of the fan 2, forming a mounting cavity in which the fan 2 is housed. Furthermore, the main control board 4 is also mounted on the mounting bracket 8, thus securing the main control board 4.

[0035] The above description is merely an exemplary embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the technical concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A bladeless fan, characterized in that, include: The housing has a receiving cavity and an annular air duct, the receiving cavity is connected to the annular air duct, and the housing is provided with an air outlet, which is connected to the annular air duct and the outside. A fan is disposed in the housing and located within the receiving cavity, with the air outlet of the fan facing the annular air duct; The housing has a hook opening.

2. The bladeless fan as described in claim 1, characterized in that, The housing has a first side and a second side arranged opposite to each other, and the air outlet is located on the first side; the housing has an annular space that passes through the first side and the second side; the annular air duct is arranged around the annular space.

3. The bladeless fan as described in claim 2, characterized in that, The hook opening is connected to the annular space; The hook opening has a first end close to the annular space and a second end away from the annular space, the distance between the first end and the fan is greater than the distance between the second end and the fan.

4. The bladeless fan as described in any one of claims 1 to 3, characterized in that, The air outlet includes multiple air supply sections, and the multiple air supply sections are connected to the annular air duct.

5. The bladeless fan as described in any one of claims 1 to 3, characterized in that, An air inlet is provided at one end of the housing away from the annular air duct, and the air inlet connects the housing cavity to the outside.

6. The bladeless fan as described in claim 5, characterized in that, The bladeless fan also includes a dust cover, which is placed over the air inlet and has multiple air inlet holes.

7. The bladeless fan as described in claim 6, characterized in that, The bladeless fan also includes a main control board, which is disposed in the housing and located in the receiving cavity, and is electrically connected to the fan.

8. The bladeless fan as described in claim 7, characterized in that, The main control board also includes control keys, at least a portion of which are exposed outside the housing and located on a first side of the housing.

9. The bladeless fan as described in claim 7, characterized in that, The main control board also includes a display screen, which is exposed outside the housing.

10. The bladeless fan as described in any one of claims 1 to 3, characterized in that, The bladeless fan also includes a battery, which is disposed in the housing and located within the cavity, and is electrically connected to the fan.

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