Double-air-port bending type bladeless fan

Abstract

The utility model discloses a double-air-port bending type bladeless fan. The fan comprises a base, a main body table, an air inlet, an electric wire, a brushless electric fan, an integrated air channel and other main parts. After being accelerated by the brushless electric fan, airflow enters the streamline air channel and is exhausted through the two air outlets. Due to the contraction design of the streamline flow guide plate and the air channel, different flow speeds are formed when air flow passes through the two air outlets, and therefore the fitting degree of the air flow and an air channel frame is enhanced through the Bernoulli principle and the Coanda principle, air flow disturbance is reduced, and the stability of wind power output is improved. The fan adopts the bladeless design, noise is effectively reduced, potential safety hazards are eliminated, meanwhile, the fan is attractive in appearance due to the integrated air channel design, and the fan is suitable for families, offices and other places and has the high mute effect and safety.

Description

Technical Field

[0001] This utility model relates to fan technology, specifically a dual-outlet folding bladeless fan, which belongs to the field of fluid mechanics and aerodynamics. It also encompasses innovative exterior design, with an aesthetic appearance design created using modeling software, belonging to the field of industrial design. Background Technology

[0002] With technological advancements and improved living standards, the market demand for home appliances such as air conditioners and fans continues to grow. Traditional fans typically operate by rotating blades to circulate air. However, traditional fans have several drawbacks, such as noise from high-speed blade rotation, uneven airflow, and safety hazards. To address these issues, bladeless fans have gained increasing popularity among consumers in recent years.

[0003] The basic principle of bladeless fans is based on aerodynamics, using a special annular or fan-shaped structure to draw in air and accelerate its expulsion, thus achieving airflow. However, existing bladeless fans typically employ a single air intake and exhaust structure. While they can provide some airflow, their efficiency in concentrating airflow using the Coanda principle remains limited. Existing bladeless fan technologies have areas for improvement in avoiding airflow collisions that create turbulence and in the fit between the airflow and the frame.

[0004] For example, the Dyson bladeless fan is a bladeless fan design. Although this design effectively solves the noise and safety problems of traditional fans, the airflow acceleration effect in its structure depends on the fixed channel shape, and the airflow from a single air outlet is relatively diffuse. The airflow's directionality in adhering to the frame is limited, and airflow disturbance is easily generated when the frame spacing is narrow. Therefore, the design of the air duct outer frame requires a wider width. Utility Model Content

[0005] To address the issue of insufficient airflow concentration around the duct frame in existing technologies, this invention provides a dual-duct outlet structure design based on fluid dynamics principles. By utilizing the airflow interaction force generated by the difference in gas velocity and Bernoulli's principle to change the airflow direction, the ejected airflow more closely adheres to the duct frame, thereby improving the efficiency of air circulation within the bladeless fan.

[0006] The technical solution adopted by this utility model to solve its technical problem includes two parts: an overall aesthetically pleasing fan structure design and a dual-outlet air duct cross-sectional structure design. The fan as a whole comprises several parts: a base, a main body, an air inlet, a power outlet, wires, a sliding rheostat, a brushless electric fan, a switch, and an integrated air duct. The components constituting the integrated air duct are the same as those constituting the air duct cross-section. The air duct cross-sectional structure includes five parts: a streamlined air duct body, a streamlined guide plate, a connecting bracket, an air outlet one, and an air outlet two.

[0007] The aforementioned fan features an aesthetically pleasing overall structural design: the main unit is mounted on a base, and inside the main unit are installed a power outlet, switch, sliding rheostat, and brushless electric fan, all connected by wires. The switch button and sliding rheostat knob are mounted on the upper surface of the main unit. The air inlet is located below the main unit and connects to the brushless electric fan. An integrated air duct is mounted on top of the main unit and connects to the brushless electric fan.

[0008] The aforementioned dual-outlet air duct cross-sectional structure design features a streamlined guide vane located inside the streamlined air duct body and connected to it via a connecting bracket. The angle of the guide vane ultimately creates two air outlets, one large and one small.

[0009] The beneficial effects of this utility model are as follows: From the perspective of the overall aesthetic design of the fan, firstly, the bladeless design and the use of a brushless electric fan enable the fan to have excellent quiet operation. Secondly, the bladeless design avoids the safety hazards caused by high-speed rotating blades. Finally, the integrated folding air duct design is novel, beautiful, and aesthetically pleasing. From the perspective of the cross-sectional structure design of the dual-outlet air duct, this utility model adopts a dual-duct air outlet design. Building upon the existing Coanda principle which allows airflow to conform to the air duct frame, it further utilizes Bernoulli's principle to generate pressure that controls the airflow direction, enhancing the conformity between the airflow and the air duct frame. This makes the airflow circulation within the annular channel more efficient and the airflow direction more stable. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0011] Figure 1 A schematic diagram of the overall aesthetically pleasing structure of the fan;

[0012] Figure 2 A schematic diagram of the cross-sectional structure design of a dual-outlet air duct;

[0013] Figure 3 This is a schematic diagram of the airflow direction in the cross-section of a dual-outlet air duct.

[0014] Figure 4A side view of a single airway;

[0015] Figure 5 A 3D solid model of the overall aesthetic structure of the fan;

[0016] Figure 6 A detailed schematic diagram of the cross-section of the air duct of a three-dimensional physical fan.

[0017] Figure 7 A three-dimensional solid model of the cross-section of a dual-outlet air duct;

[0018] Figure 8 Solid figure of internal components;

[0019] In the diagram: 1. Integrated air duct; 2. Sliding rheostat; 3. Switch; 4. Wire; 5. Brushless electric fan; 6. Air inlet; 7. Main body; 8. Base; 9. Power socket; 10. Streamlined guide plate; 11. Streamlined air duct body; 12. Connecting bracket; 13. Air outlet one; 14. Air outlet two; 15. Airflow one; 16. Airflow two; 17. Airflow three; 18. Force direction one; 19. Airflow four; 20. Airflow five; 21. Airflow six; 22. Force direction two. Detailed Implementation

[0020]

Example 1

[0021] As shown in the figure, a dual-outlet folding bladeless fan includes a base 8, a main body 7, and an integrated air duct 1. The main body 7 is mounted on the base 8, and the integrated air duct 1 is mounted on the main body 7. The air duct of the integrated air duct 1 is connected to the brushless electric fan 5 in the main body 7. A wire 4, the brushless electric fan 5, and a power socket 9 are installed inside the main body 7. A sliding rheostat 2 and a switch 3 are installed on the outside of the main body 7. The sliding rheostat 2, switch 3, brushless electric fan 5, and power socket 9 are connected in series via the wire 4. The air inlet 6 is located at the lower part of the main body 7 and is connected to the brushless electric fan 5. The integrated air duct 1 adopts an integrated folding design, forming... The integrated air duct 1 consists of three parts: a streamlined guide plate 10, a streamlined air duct body 11, and a connecting bracket 12. The streamlined air duct body 11 and the streamlined guide plate 10 are connected by the connecting bracket 12. In the integrated air duct 1, the streamlined air duct body 11 and the streamlined guide plate 10 adopt a streamlined design. The positional relationship between the streamlined air duct body 11 and the streamlined guide plate 10 can be adjusted by the difference in angle with the connecting bracket 12 to form two air outlets, namely air outlet one 13 and air outlet two 14, wherein the opening size of air outlet two 14 is smaller than that of air outlet one 13.

[0022] The circuit drive description is attached. Figure 1As shown, the power socket 9, brushless electric fan 5, sliding rheostat 2, and switch 3 are connected in series via wire 4. After the power is connected to the power socket 9 and the switch 3 is turned on, the brushless electric fan starts and generates airflow within the main body 7. The user can adjust the output power of the brushless electric fan 5 by rotating the knob of the sliding rheostat 2, thereby adjusting the airflow.

[0023]

Example 2

[0024] Specifically, the internal air passage connected to the second air outlet 14 continuously contracts, while the internal cavity connected to the first air outlet 13 has a certain width. Internal airflow circulation; this section mainly describes the airflow process within the fan body, as shown in the attached diagram. Figure 1 As shown, external airflow first enters through air inlet 6, is accelerated by brushless electric fan 5, and finally exits through U-shaped integrated air duct 1. (See attached diagram) Figure 2 As shown, the cross-section of the integrated air duct 1 has two air outlets, namely air outlet one and air outlet two, from which the gas will be discharged.

[0025] Specifically, the outer frame of the integrated airway 1 opens outwards at an angle, being wider on the outside and narrower on the inside. (See attached image.) Figure 2 As shown, based on the streamlined design of the streamlined air duct body 11 and the streamlined guide plate 10, the first airflow will be discharged from the air outlet 13. Due to the large opening, the outflowing airflow velocity is relatively slow. As the airflow channel between the streamlined air duct body 11 and the streamlined guide plate 10 continuously contracts, the outlet 14 is narrower, so the airflow velocity from the outlet 14 is faster.

[0026]

Example 3

[0027] Specifically, the airflow circulation path between the air inlet 6 and the air outlet 13 and air outlet 2 14 is designed as a bladeless structure to avoid the noise and safety hazards of traditional fans.

[0028] External airflow circulation: The introduction to external airflow circulation involves some explanation of internal circulation. The section on external airflow circulation mainly revolves around the external airflow circulation. Figure 3 Before the airflow exits from the integrated air duct 1, it circulates within the air duct cavity, as shown in airflow 15. At this time, the airflow will exit from air outlet 13 and air outlet 24 respectively. Since the airflow channel contracts before exiting from air outlet 24, the airflow velocity at air outlet 24 will be greater than that at air outlet 13.

[0029] When airflow exits from the outlet, two situations may occur: according to the attached... Figure 2 With appendix Figure 3The first scenario, based on the Coanda principle, involves a fluid encountering a curved wall. It deviates from its original flow direction and tends to flow along the wall. This portion of the airflow adheres to the curved surfaces of the streamlined air duct body 11 and the streamlined guide plate 10, as shown in airflow pattern 2 (16) and airflow pattern 5 (20). This airflow adhering closely to the wall is beneficial for external circulation and will not be discussed further. The second scenario involves outward-spreading airflow. When the distance between the left and right walls of the integrated air duct 1 is close, this outward-spreading airflow will first interact, causing the airflow to cancel each other out and reduce efficiency. Secondly, the interaction of the two airflows may generate vortices, causing airflow disturbance and instability. Therefore, we need to make the direction of this outer airflow closer to the direction of the outlet. The outward-spreading airflow is shown in airflow pattern 3 (17) and airflow pattern 4 (19). According to Bernoulli's principle, the faster a fluid flows within a certain area, the lower its pressure. As explained earlier, the airflow velocity at vent 2 14 is greater than that at vent 13. Therefore, it can be deduced that the airflow velocity at overflowing vent 4 19 is greater than that at overflowing vent 3 17. Consequently, the pressure at overflowing vent 4 19 will be lower than that at overflowing vent 3 17. A force will be generated between the two airflows, as shown in the force direction 18. According to the diagram, these two airflows will deflect along the force direction 18, thus getting closer to the wall and enhancing the directionality of the airflow.

[0030] Appendix Figure 4 This section shows a side view of a single air duct, primarily explaining the main principle of external airflow circulation. The airflow blowing out from the entire annular air duct is airflow 621. According to Bernoulli's principle, the pressure in the area where airflow 621 is located is lower, while the pressure is higher in another section where there is no airflow. Therefore, the side with higher pressure will exert a force on the side with lower pressure, as shown in force direction 22. This also creates a stronger airflow effect on top of the existing airflow generated in the air duct, which is the main principle of bladeless fans.

[0031]

Example 4

[0032] Appendix Figure 5 Appendix Figure 6 Appendix Figure 7 This is a 3D model illustration constructed according to the design requirements of this patent, attached. Figure 8 The diagram shows the physical components installed inside the main unit 7, including the brushless electric fan 5, the sliding rheostat 2, the switch 3, and the power socket 9. It demonstrates the overall design effect and details of the airway design of this patent, thereby making this patent easier to understand.

[0033] As attached Figure 5As shown, the integrated air duct 1 of the bladeless fan designed in this patent forms two external circulation air ducts after bending, discharging air from both the front and rear sides. Through the outward-spreading design of the frame, the airflow is diffused, expanding the radiation range of the airflow and thus eliminating the need for fan directional control. The air intake of the fan's external circulation section mainly draws air in from the left and right sides and the top of the fan. Similarly, the frame is designed with an outward spread to further expand the radiation range of the drawn-in airflow.

[0034] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A double-outlet bent bladeless fan, comprising a base (8), a main body (7), and an integrated air duct (1), wherein the main body (7) is mounted on the base (8), and the integrated air duct (1) is mounted on the main body (7), wherein the air duct of the integrated air duct (1) is connected to a brushless electric fan (5) in the main body (7), and wires (4), the brushless electric fan (5), and a power socket (9) are installed inside the main body (7), and a sliding rheostat (2) and a switch (3) are installed outside the main body (7). The sliding rheostat (2), the switch (3), the brushless electric fan (5), and the power socket (9) are connected in series through wires (4), and an air inlet (6) is located at the lower part of the main body (7) and is connected to the brushless electric fan (5), characterized in that, The integrated air duct (1) adopts an integrated foldable appearance design, forming two annular air outlet channels and two open air inlet channels. The integrated air duct (1) consists of three parts: a streamlined guide plate (10), a streamlined air duct body (11), and a connecting bracket (12). The streamlined air duct body (11) and the streamlined guide plate (10) are connected by the connecting bracket (12). In the integrated air duct (1), the streamlined air duct body (11) and the streamlined guide plate (10) adopt a streamlined design. The positional relationship between the streamlined air duct body (11) and the streamlined guide plate (10) can be adjusted by the angle difference with the connecting bracket (12) to form two air outlets, namely air outlet one (13) and air outlet two (14), wherein the opening size of air outlet two (14) is smaller than that of air outlet one (13).

2. The bladeless fan with dual air outlets and a bent shape according to claim 1, characterized in that, The internal air passage connected to the second air outlet (14) continuously contracts, while the internal cavity connected to the first air outlet (13) has a certain width.

3. The bladeless fan with dual air outlets and a bent shape according to claim 2, characterized in that, The outer frame of the integrated airway (1) is flared outwards, with a wider outer frame and a narrower inner frame.

4. The dual-outlet bent bladeless fan according to claim 1, characterized in that, The airflow circulation path between the air inlet (6) and the first air outlet (13) and the second air outlet (14) is a bladeless structure.

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