A tower fan

Abstract

The utility model discloses a tower fan, including casing and flow guide subassembly, the casing surface is equipped with air inlet and air outlet, and the casing inside forms the installation cavity, is provided with the cross flow air drum in the installation cavity, and the cross flow air drum is connected with the driving piece, and the driving piece is rotated to make the cross flow air drum rotate and make the air form the tangential air current that is tangent to the outer peripheral surface of cross flow air drum, the flow guide subassembly at least includes a air duct board, and the air duct board sets up in the installation cavity and both sides abuts the edge of air inlet, air outlet respectively, and the cross flow air drum rotates and makes the air current form the flow path that flows to the air outlet along the air duct board from the air inlet. The utility model technical scheme aims at can the reasonable guidance air's flow, to make the air flow in the air duct smooth, avoids the air current repeatedly backflow in the air duct and produces the abnormal noise in the vortex that produces in the air duct in the air duct, is favorable to improve the air supply of tower fan and reduces the working noise.

Description

Technical Field

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

[0002] Tower fans, also known as tower fans because of their slender and upright shape, which resembles a building, are based on the principles of aerodynamics. They generate centrifugal wind by rotating a cross-flow fan to create wind pressure, and then transmit the wind through an internal airflow guiding structure. Because tower fans deliver even and gentle air, very close to natural wind, they are becoming increasingly popular with consumers.

[0003] Existing tower fan duct systems include a volute and a cross-flow blower housed within it. The volute has opposing air inlets and outlets, forming a spiral channel for airflow. As the cross-flow blower rotates, air is ejected from the inlet along the tangential direction of the blower, impacting and being constricted and guided by the volute. However, the existing tower fan volute design is flawed, making it difficult for air to be smoothly guided to the outlet. Instead, air flows back within the volute. When this backflow reaches the inlet, it forms vortices with newly entering air, generating noise. Furthermore, the large amount of backflow results in less air being delivered to the outlet, leading to a common problem of insufficient airflow in existing tower fans. Furthermore, the air is constricted and guided by the volute when it impacts the fan. When the volute is too close to the cross-flow fan, the air thrown out by the cross-flow fan will quickly impact the volute, resulting in high wind pressure but also increased noise. When the volute is too far from the cross-flow fan, the tower fan will have low wind pressure and reduced airflow. In other words, existing tower fans cannot effectively control wind pressure and noise. Utility Model Content

[0004] The main purpose of this utility model is to provide a tower fan that can rationally guide the flow of air, so that the air flows smoothly in the duct, avoids the repeated backflow of air in the duct and the generation of eddies in the duct that would cause abnormal noise, and helps to improve the air volume of the tower fan and reduce the operating noise.

[0005] To achieve the above objectives, this utility model proposes a tower fan, comprising:

[0006] The housing has an air inlet and an air outlet on its surface. An installation cavity is formed inside the housing. A cross-flow blower is installed in the installation cavity. The cross-flow blower is connected to a driving component to drive the cross-flow blower to rotate so that the air forms a tangential airflow that is tangential to the outer circumferential surface of the cross-flow blower.

[0007] A flow guiding component, comprising at least one air duct plate, wherein the air duct plate is disposed within the mounting cavity and its two sides respectively abut against the edges of the air inlet and the air outlet, wherein when the cross-flow blower rotates, the airflow forms a flow path from the air inlet along the air duct plate to the air outlet.

[0008] In one possible implementation, the distance between the duct plate and the cross-flow blower gradually increases along the direction from the air inlet to the air outlet.

[0009] In one possible implementation, the airflow guiding assembly further includes a pressure plate, with support plates on both sides of the pressure plate, and the edge of one support plate located on the side of the air outlet away from the air duct plate.

[0010] In one possible implementation, the housing includes a front housing and a rear housing, with the air inlet located in the rear housing and the air outlet located in the front housing.

[0011] In one possible implementation, the outer surface of the air inlet is also covered with a filter screen.

[0012] This utility model's technical solution employs an airflow duct system consisting of a cross-flow blower, an air duct plate, and an air pressure plate. This system not only achieves powerful air delivery with low noise and high air volume, but also reduces turbulence through a gradually expanding air duct, making the airflow smoother. The rear air inlet is covered with a removable filter cover, which effectively blocks dust and hair, extending its service life. The cooperation between the air pressure plate and the support plate reduces most of the backflow and increases the air pressure, ensuring stable long-distance air delivery. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of an embodiment of the tower fan of this utility model;

[0015] Figure 2 This is a cross-sectional view of an embodiment of the tower fan of this utility model;

[0016] Figure 3 This is an exploded view of an embodiment of the tower fan of this utility model.

[0017] Explanation of icon numbers:

[0018] 1. Housing; 11. Air inlet; 12. Air outlet; 13. Front housing; 14. Rear housing; 2. Cross-flow blower; 3. Drive unit; 4. Air duct plate; 5. Air pressure plate; 51. Support plate; 6. Filter screen cover; 7. Flow path.

[0019] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0021] Reference Figures 1 to 3 This utility model proposes a tower fan, including a housing 1 and a flow guiding assembly. The housing 1 has an air inlet 11 and an air outlet 12 on its surface. An installation cavity is formed inside the housing 1. A cross-flow blower 2 is installed in the installation cavity. The cross-flow blower 2 is connected to a driving component 3 to drive the cross-flow blower 2 to rotate so that the air forms a tangential airflow that is tangential to the outer peripheral surface of the cross-flow blower 2. The flow guiding assembly includes at least one air duct plate 4. The air duct plate 4 is installed in the installation cavity and its two sides abut against the edges of the air inlet 11 and the air outlet 12, respectively. When the cross-flow blower 2 rotates, the airflow forms a flow path 7 from the air inlet 11 along the air duct plate 4 to the air outlet 12.

[0022] Understandably, housing 1 is the outer frame of the tower fan, with an air inlet 11 and an air outlet 12 on its surface. The space inside housing 1 is a mounting cavity for placing other components. The cross-flow blower 2 is a cylindrical fan impeller installed inside the cavity. When it rotates, it generates tangential airflow along its outer circumferential surface, meaning the airflow direction is tangential to the outer circumference of the blower. The drive unit 3 is a motor used to drive the cross-flow blower 2 to rotate. In this example, the plane of the air outlet 12 is perpendicular to part of the tangential airflow, meaning the airflow will blow directly out of the air outlet 12 without obstruction, making the final airflow direction more concentrated.

[0023] The airflow guiding assembly includes at least one air duct plate 4, installed inside the cavity, with its two sides connected to the edges of the air inlet 11 and the air outlet 12, respectively. The function of the air duct plate 4 is to guide the airflow to form a clear path: entering from the air inlet 11 – flowing along the air duct plate 4 – and being blown out from the air outlet 12. The air duct plate 4 is positioned beside the air inlet 11, with a small gap between the air duct plate 4 and the cross-flow blower 2 at the air inlet, effectively guiding the airflow in and increasing the pressure to accelerate the airflow. The air outlet 12 side of the air duct plate 4 is aligned with the tangential direction of the cross-flow blower 2, thus reducing the impact of the airflow with the air duct plate 4 and preventing airflow loss. When the tower fan is operating, the airflow flows in from the air inlet 11, is guided outward from the tangential direction of the cross-flow blower 2 due to the rotation of the cross-flow blower 2, and is then guided outward along the air duct plate 4 to the air outlet 12, thus ensuring smooth airflow along the flow path 7, guaranteeing the airflow volume of the tower fan and reducing the operating noise of the tower fan.

[0024] Reference Figure 2 In one embodiment of this utility model, the distance between the air duct plate 4 and the cross-flow blower 2 gradually increases along the direction from the air inlet 11 to the air outlet 12.

[0025] Understandably, the distance between the duct plate 4 and the cross-flow blower 2 gradually increases along the direction from the air inlet 11 to the air outlet 12, so that the duct plate 4 is aligned with the tangential direction of the cross-flow blower 2 on the air outlet 12 side. This design has two main functions: reducing airflow impact and lowering noise. If the distance between the duct plate 4 and the cross-flow blower 2 is fixed, the airflow will impact the duct plate 4 during flow, generating turbulence and noise. The gradually increasing distance allows the airflow to transition more smoothly, reducing sudden collisions and thus lowering noise. Optimizing the airflow direction and increasing the air volume. On the air outlet 12 side, the direction of the duct plate 4 is aligned with the tangential direction of the cross-flow blower 2, which means that the airflow can flow out more smoothly without losing energy due to the obstruction of the duct plate 4. With this design, the airflow can be guided to the air outlet 12 more efficiently, reducing wind resistance and increasing the air volume.

[0026] Reference Figures 2 to 3 In one embodiment of the present invention, the airflow guiding component further includes a wind pressure plate 5, and support plates 51 are provided on both sides of the wind pressure plate 5. The edge of the support plate 51 is located on the side of the air outlet 12 away from the air duct plate 4.

[0027] Understandably, in addition to the air duct plate 4, the airflow guiding assembly also includes a pressure plate 5. The pressure plate 5 has support structures at both ends for fixing its position and assisting in airflow guidance. One of the support plates 51 is located on the side of the air outlet 12 away from the air duct plate 4, i.e., near the outer side of the air outlet 12, serving to block the airflow. When the cross-flow blower 2 rotates, some airflow will form a backflow near the air outlet 12, meaning the air is not completely blown out but instead loops back into the blower, reducing airflow efficiency. The support plate 51, located on the outer side of the air outlet 12, can block this backflow airflow, forcing more airflow out of the air outlet 12 and reducing energy loss.

[0028] The air pressure plate 5 and the cross-flow blower 2 are close together, forming a narrow flow channel. When a small portion of the recirculating airflow passes through this narrow space, the flow velocity increases and the static pressure decreases, but the overall air pressure increases, guiding the airflow and ensuring smooth airflow within the duct. A reasonable gap is maintained between the air pressure plate 5 and the cross-flow blower 2 to prevent the air pressure plate 5 from being too close to the cross-flow blower 2, which would cause excessive noise from the tower fan, and to prevent the gap from being too large, which would weaken the air pressure plate 5's guiding strength of the airflow, thus ensuring the tower fan's air pressure and providing good wind power. At the same time, the reasonable gap prevents the airflow from forming eddies within the duct.

[0029] Reference Figure 3 In one embodiment of the present invention, the housing 1 includes a front housing 13 and a rear housing 14, with an air inlet 11 opened in the rear housing 14 and an air outlet 12 opened in the front housing 13.

[0030] Understandably, the front shell 13 faces the user side, and the rear shell 14 faces away from the user side. Air enters from the air inlet 11 of the rear shell 14, is accelerated by the cross-flow blower 2, is guided along the air duct plate 4, and is blown out from the air outlet 12 of the front shell 13. The detachable front and rear shells 14 are designed to facilitate cleaning the cross-flow blower 2 or replacing the filter.

[0031] Reference Figures 1 to 3 In one embodiment of this utility model, the outer surface of the air inlet 11 is also covered with a filter screen 6.

[0032] Understandably, the filter cover 6 covers the outer surface of the air inlet 11 of the rear housing 14, directly contacting the outside air and acting as the first line of defense. Its removable design facilitates regular cleaning or replacement. The filter cover 6 is used to filter dust and particulate matter, preventing hair, dust, debris, etc. from entering the tower fan, keeping the cross-flow blower 2 and internal air ducts clean, and extending its service life; it also protects the internal structure, preventing foreign objects from accidentally entering the air inlet 11 and improving safety.

[0033] This utility model's technical solution employs an airflow duct system consisting of a cross-flow blower 2, an air duct plate 4, and an air pressure plate 5. This system not only achieves powerful air delivery with low noise and high air volume but also reduces turbulence through a gradually expanding air duct, making the airflow smoother. The rear shell 14's air inlet 11 is covered by a removable filter cover 6, which effectively blocks dust and hair, extending its service life. The cooperation between the air pressure plate 5 and the support plate 51 reduces most of the backflow and increases the air pressure, ensuring stable long-distance air delivery.

[0034] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0035] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A tower fan, characterized in that, include: The housing has an air inlet and an air outlet on its surface. An installation cavity is formed inside the housing. A cross-flow blower is installed in the installation cavity. The cross-flow blower is connected to a driving component to drive the cross-flow blower to rotate so that the air forms a tangential airflow that is tangential to the outer circumferential surface of the cross-flow blower. A flow guiding component, comprising at least one air duct plate, wherein the air duct plate is disposed within the mounting cavity and its two sides respectively abut against the edges of the air inlet and the air outlet, wherein when the cross-flow blower rotates, the airflow forms a flow path from the air inlet along the air duct plate to the air outlet.

2. The tower fan according to claim 1, characterized in that, The distance between the air duct plate and the cross-flow blower gradually increases along the direction from the air inlet to the air outlet.

3. The tower fan according to claim 2, characterized in that, The airflow guiding assembly also includes a pressure plate, with support plates on both sides of the pressure plate, and the edge of one support plate is located on the side of the air outlet away from the air duct plate.

4. The tower fan according to claim 3, characterized in that, The housing includes a front housing and a rear housing, with the air inlet located in the rear housing and the air outlet located in the front housing.

5. The tower fan according to claim 4, characterized in that, The outer surface of the air inlet is also covered with a filter screen.

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