A bladeless fan and light fixture

Abstract

A kind of bladeless fan and lamp, wherein the bladeless fan includes impeller and shell, the top of shell has air inlet, the bottom of shell has air outlet, impeller is installed in shell, the inside of shell is smooth surface, driving assembly is installed in the top of shell, driving assembly is connected with impeller, impeller is rotated in shell by driving assembly, the annular frame of impeller includes middle through-hole, upper layer blade and lower layer blade, upper layer blade is installed on the upper surface of annular frame, lower layer blade is installed on the lower surface of annular frame.The utility model discloses by upper and lower double-layer blade, so as to not need to set up air deflector in the inside of shell, improve air volume, reduce noise at the same time, improve fan quality, adopt double-layer light, light source effect is more hierarchical.

Description

Technical Field

[0001] This utility model relates to a fan light, specifically a bladeless fan and light fixture. Background Technology

[0002] A fan light is an electrical appliance that combines household lighting and ventilation, serving the functions of both a lamp and a fan. Currently, most fan lights are suspended from the ceiling with exposed blades, while some have blades that extend during use and retract when not in operation. Both types of fan lights, due to the protruding blades, often generate significant noise during use. Another type of fan light uses a bladeless design, with a confined impeller within the casing. This design offers advantages such as smaller footprint and a compact appearance. However, this bladeless impeller is a single-layer impeller, and the casing is a sealed structure with an air outlet at the bottom. When the impeller rotates, the air is blown towards the inner wall of the casing. To ensure the airflow exits smoothly, a guide vane is needed on the inner wall. The airflow from the rotating impeller is forced through the inner wall at a 90-degree angle, then pushed out by the guide vane. The resulting airflow is relatively small, and the airflow itself generates further noise upon contact with the guide vane, leading to significant overall noise levels.

[0003] In addition, current fan lights are usually installed on a single horizontal plane, which is a single-layer light source and the light source effect is relatively poor. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a bladeless fan and lamp, which has the advantages of improving airflow guidance accuracy, reducing noise, and optimizing structural compactness.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A bladeless fan includes an impeller and a housing. The housing has an air inlet at the top and an air outlet at the bottom. The impeller is installed inside the housing. The inner side of the housing has a smooth surface. A drive assembly is installed on the top of the housing and is connected to the impeller. The drive assembly drives the impeller to rotate inside the housing. The impeller includes an annular frame with a through hole in the middle, upper blades, and lower blades. The upper blades are installed on the upper surface of the annular frame, and the lower blades are installed on the lower surface of the annular frame.

[0007] As a further improvement, a connecting frame is installed inside the annular frame, and the drive assembly includes a support frame and a motor. The motor is mounted on or inside the support frame, the support frame is installed and connected to the housing, and the drive shaft of the motor is connected to the connecting frame.

[0008] As a further improvement, the upper blade bends and extends outward toward the annular frame, with a portion located outside the annular frame, and the lower blade bends and extends inward toward the through hole of the annular frame, with a portion located in the corresponding area of ​​the through hole.

[0009] As a further improvement, the orthographic projection length of the upper blade is greater than that of the lower blade.

[0010] As a further improvement, the upper blade has a first inclined section, a second inclined section and a horizontal section on the side facing the air inlet at the top of the housing. One end of the second inclined section is connected to the first inclined section and the other end is connected to the horizontal section. The inclination angle of the first inclined section is smaller than that of the second inclined section.

[0011] As a further improvement, the first inclined segment and the second inclined segment, as well as the second inclined segment and the horizontal segment, form an angle greater than 90 degrees.

[0012] As a further improvement, the connecting frame, upper blade, lower blade, and annular frame are integrally formed.

[0013] A lamp fixture has an upper light source housing and a lower light source housing installed at the air outlet of the housing. The lower light source housing is connected to the upper light source housing. The upper light source housing has an opening in the central area. The lower light source housing is installed in the opening area. The lower light source housing or the upper light source housing is connected to an annular frame. Light-emitting elements are installed inside both the upper and lower light source housings. There is a gap between the upper light source housing and the housing.

[0014] As a further improvement, the projected surface of the upper light source housing completely obscures the impeller.

[0015] This utility model has the following beneficial technical effects:

[0016] The impeller structure with upper and lower double-layer blades can better guide the air, allowing the air to blow out along the blades and then be discharged from the air outlet of the casing. Since there is no need to touch the air guide plate inside the casing, noise is reduced, while the two layers of blades increase the air volume; and the double-layer light source enhances the sense of layering of the light. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural diagram of the bladeless fan of this utility model;

[0018] Figure 2 This is a structural schematic diagram of the bladeless fan of this utility model from another perspective;

[0019] Figure 3 This is a three-dimensional structural diagram of the impeller in this utility model;

[0020] Figure 4 This is a top view of the impeller structure in this utility model;

[0021] Figure 5 This is a schematic diagram of the structure of the lamp of this utility model;

[0022] Figure label:

[0023] 1. Housing, 2. Impeller, 3. Drive assembly, 4. Annular frame, 5. Upper blade, 51. First inclined section, 52. Second inclined section, 53. Horizontal section, 6. Lower blade, 7. Connecting frame, 8. Upper light source housing, 9. Lower light source housing, 10. Air inlet, 11. Air outlet. Detailed Implementation

[0024] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0025] In the description of this utility model, it should be understood that if terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise" are used to 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 utility model 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, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0027] Example 1

[0028] like Figure 1-4 As shown, a bladeless fan includes an impeller 2 and a housing 1. The housing 1 has an air inlet 10 at the top and an air outlet 11 at the bottom. The impeller 2 is installed inside the housing 1, and the inner surface of the housing 1 is a smooth surface. A drive assembly 3 is installed on the top of the housing 1 and is connected to the impeller 2. The drive assembly 3 drives the impeller 2 to rotate inside the housing 1. The impeller 2 includes an annular frame 4 with a through hole in the middle, an upper blade 5, and a lower blade 6. The upper blade 5 is installed on the upper surface of the annular frame 4, and the lower blade 6 is installed on the lower surface of the annular frame 4. By using upper and lower double-layer blades, air can be introduced from both the top and bottom, and the air is guided by the upper and lower blades, and discharged more smoothly from the air outlet of the housing along the inner surface of the housing. This eliminates the need for an additional air guide plate, reduces contact, lowers noise, and increases the air volume.

[0029] The annular frame is typically made of engineering plastic, and the through-hole diameter can be 30%-50% of the shell diameter. It guides airflow to form a bidirectional flow path. The upper blades are the flow-guiding structures distributed on the upper surface of the annular frame. They can be designed with an arc-shaped surface and an installation angle of 15°-45°, guiding external airflow towards the shell edge. The lower blades are the flow-guiding structures distributed on the lower surface of the annular frame. They can be designed with a reverse-bending shape, and their installation density can be 80%-120% of the upper blades. They guide the airflow downwards and accelerates it in the through-hole area; that is, the installation densities of the upper and lower blades can be the same or different.

[0030] The inner surface of the housing remains smooth, eliminating the need for additional air guide plates.

[0031] Specifically, after air enters the casing through the top inlet, it forms two layers of air intake through the upper and lower blades, creating a laminar flow effect when output outward. When the drive assembly rotates the impeller, the upper blades guide part of the airflow along the outer side of the annular frame to the edge of the casing, while the lower blades accelerate the remaining airflow downward through the through-holes. The two airflows converge at the outlet to form a stable air curtain, increasing the output air volume. Furthermore, since there is no need to install air guide plates on the inner side of the casing, the contact and impact of the airflow are reduced, thus decreasing noise.

[0032] Compared to existing technologies, traditional bladeless fans using single-layer blades suffer from insufficient airflow stratification, while a double-layer blade layout achieves an airflow superposition effect. Existing casings often have internal guide ribs that force air out, increasing noise. This solution eliminates the need for guide vanes by using two layers of blades.

[0033] Through the above technical solutions, this application achieves airflow stratification acceleration and fusion, effectively improving the uniformity of airflow. The double-layer blade layout reduces the load pressure on a single blade and lowers high-frequency vibration noise. The top mounting method of the drive assembly simplifies the maintenance process, and the annular frame structure improves the overall structural strength of the impeller, increasing the airflow output at the same power.

[0034] A connecting frame 7 is installed inside the annular frame 4. The drive assembly 3 includes a support frame and a motor. The motor is mounted on or inside the support frame, which is connected to the housing. The drive shaft of the motor is connected to the connecting frame. The motor drives the impeller to rotate. When the motor starts, the drive shaft drives the connecting frame to rotate synchronously, thereby driving the annular frame and the upper and lower blades to rotate coaxially. The integrated design of the connecting frame and the annular frame shortens the power transmission path, and the rigid connection between the support frame and the housing effectively suppresses vibration transmission during motor operation.

[0035] The upper blade 5 bends and extends outward toward the annular frame 4, with a portion located outside the annular frame. The lower blade 6 bends and extends inward toward the through hole of the annular frame 4, with a portion located inside the through hole. Several upper blades form an upper impeller, and several lower blades form a lower impeller. The outer diameter of the upper impeller is larger than the outer diameter of the lower impeller.

[0036] The lower blade 6 can be integrally formed by adopting a curved shape symmetrical to that of the upper blade 5, and its inward extension can adjust the airflow speed inside the through hole.

[0037] Specifically, the upper blade 5 bends outward and extends beyond the outer edge of the annular frame 4, forming a tapered flow channel between the end of the upper blade 5 and the inner wall of the casing 1. When the impeller rotates, the airflow accelerates within the tapered flow channel, creating a negative pressure zone and thus enhancing the intake efficiency of external air. The lower blade 6 bends inward and extends to the area corresponding to the through hole, forming a spiral airflow path within the through hole. Through centrifugal force, the airflow is concentrated and transported towards the outlet, thereby reducing energy loss of the airflow within the through hole.

[0038] Compared to existing technologies, traditional bladeless fans typically employ flat or single-curved blades, resulting in uneven airflow distribution and a tendency to generate turbulence. This solution utilizes a bidirectional curved design for both upper and lower blades, enabling the external intake airflow and internal delivery airflow to work synergistically, thereby increasing both the intake volume and optimizing the uniformity of the output airflow.

[0039] Through the above technical solution, this application can effectively reduce the air resistance when the impeller rotates, reduce the vortex phenomenon of airflow in the through hole, and achieve dynamic balance between air intake and exhaust through the layered flow guiding structure, thereby improving the overall air volume output stability of the bladeless fan.

[0040] The orthographic projection length of the upper blade 5 is greater than that of the lower blade 6, meaning the size of the upper blade is larger than that of the lower blade. The orthographic projection length refers to the maximum radial extension of the blade's projected profile on a plane perpendicular to the axis of rotation. This can be achieved using an asymmetrical blade layout, by adjusting the difference in curvature or installation angle between the upper and lower blades to create the difference in projection length. This feature controls the difference in airflow guidance range between different blade levels, creating a complementary relationship between the upper and lower airflow coverage areas.

[0041] When the impeller rotates, the upper blade 5, due to its larger projected length, sweeps across the outer space of the air inlet 10 at the top of the casing 1, forming an outward-diffusing airflow path; the lower blade 6, with its smaller projected length, sweeps within the space inside the through-hole of the annular frame 4, forming an airflow path converging towards the center. These two airflow paths create a pressure gradient inside the casing, causing the airflow to flow directionally and rapidly from the air inlet to the air outlet.

[0042] Compared to existing technologies, traditional bladeless fans typically use blades with equal projected lengths for the upper and lower layers, resulting in excessive overlap in the airflow paths and causing turbulence due to mutual airflow interference. This solution uses differentiated projected lengths to create a tiered guiding structure for the upper and lower airflows, reducing energy loss in the airflow convergence area.

[0043] Through the above technical solution, this application effectively solves the energy loss problem caused by the overlap of the airflow guidance range of the upper and lower blades, so that the intake airflow forms a stratified acceleration effect in the shell, which improves the airflow output efficiency while reducing operating noise.

[0044] Furthermore, the upper blade 5 has a first inclined section 51, a second inclined section 52, and a horizontal section 53 on the side facing the air inlet 10 at the top of the housing 1. One end of the second inclined section 52 is connected to the first inclined section 51, and the other end is connected to the horizontal section 53. The inclination angle of the first inclined section 51 is smaller than that of the second inclined section 52. An angle greater than 90 degrees is formed between the first inclined section 51 and the second inclined section 52, and between the second inclined section 52 and the horizontal section 53.

[0045] The first inclined section refers to the inclined structure located at the beginning of the blade's side edge. This can be achieved by setting an inclination angle of 15°-30° during injection molding, and is used to initially guide airflow into the blade area. The second inclined section is a steeply inclined structure located after the first inclined section, and can be achieved by using an inclination angle of 45°-60°. This is used to accelerate airflow across the blade surface. The horizontal section is a straight extension connecting to the end of the second inclined section. This can be achieved by using a horizontal platform whose length accounts for 20%-30% of the total blade length, and is used to stabilize the airflow output direction.

[0046] Specifically, when the airflow enters from the air inlet at the top of the casing, it first contacts the gently sloping structure of the first inclined section, where the airflow is gently guided to the blade surface. The airflow then accelerates along the steep slope of the second inclined section, finally reaching a stable output through the horizontal section. The transition points between the three sections are formed by angular differences; for example, there is a 110°-130° transition angle between the first and second inclined sections, and a 180°-200° transition angle between the second inclined section and the horizontal section. This stepped structure allows for phased adjustment of the airflow.

[0047] Compared to existing technologies, traditional blade designs with a single tilt angle on the side are prone to causing premature airflow separation on the blade surface. This design, however, uses a structure with a gentle slope followed by a steep slope to maintain the airflow in an attached flow state during acceleration. The horizontal section further avoids the vortex phenomenon caused by the sudden detachment of airflow from the blade surface, which is common in traditional designs.

[0048] Through the above technical solution, this application solves the problem of low air intake efficiency caused by the simple side structure of traditional bladeless fans. The graded tilting structure achieves gradual acceleration of airflow, while the horizontal section effectively suppresses airflow turbulence. This structural combination enables the blades to generate a more stable airflow output at the same rotational speed, while reducing noise caused by airflow separation.

[0049] When used simply as a fan, a baffle can be installed at the air outlet. The baffle has a gap with the side wall of the casing to facilitate airflow, but the internal blades are not visible from the outside, thus forming a bladeless fan.

[0050] The connecting frame, upper blade, lower blade, and annular frame are integrally formed.

[0051] Example 2

[0052] refer to Figure 1-5 As shown, a lamp fixture has an upper light source shell 8 and a lower light source shell 9 installed at the air outlet of a housing 1. The lower light source shell 9 is connected to the upper light source shell 8. The upper light source shell 8 has an opening in its central area, and the lower light source shell 9 is installed in the opening area. Either the lower or upper light source shell is connected to an annular frame. Both the upper and lower light source shells contain light-emitting elements, and there is a gap between the upper light source shell and the housing. The frontal projection surface of the upper light source shell completely covers the impeller, so the internal blades are not visible from the outside of the lamp fixture, thus forming a bladeless fan lamp structure.

[0053] That is, the bladeless fan described in this application refers to a fan whose internal blades are not visible from the outside, as the blades are completely obscured.

[0054] The upper light source housing refers to the light-transmitting housing covering the air outlet. It can be injection molded from polycarbonate or acrylic materials and is used to fix the light-emitting component and diffuse light. The lower light source housing refers to the independent light-transmitting component embedded in the opening area of ​​the upper light source housing. It can be connected by snap-fit ​​or threaded connection to achieve linkage with the ring frame. The opening refers to the hollow structure in the central area of ​​the upper light source housing. It can be designed as a circle or polygon to accommodate the lower light source housing and form an airflow channel. The light-emitting component refers to the electronic component that provides the lighting function. It can be LED beads or light strips, integrated and installed through a circuit board.

[0055] Specifically, the upper and lower light source housings form a nested layout with perforated structures. The lower light source housing is directly or indirectly connected to the impeller's annular frame, allowing the impeller to rotate and drive the lower light source housing to move synchronously. The light-emitting components are embedded inside the upper and lower light source housings, and the light is evenly diffused through the translucent material. The gaps allow the airflow at the outlet to be stably output along the channel between the housing and the upper light source housing, while avoiding obstruction of the light-emitting area.

[0056] This solution integrates the light source housing into the air outlet of a bladeless fan, utilizing the airflow generated by the impeller rotation to directly cool the light-emitting component. Simultaneously, the separate design of the upper and lower light source housings achieves dynamic lighting effects. Existing technologies often suffer from low heat dissipation efficiency or light obstruction in linked light source and fan structures. This solution, however, through the synergistic effect of gaps and openings, ensures both unobstructed airflow and maintains complete lighting integrity.

[0057] The separate, interconnected design of the upper and lower light source housings achieves dynamic lighting effects while directly dissipating heat from the light-emitting components via the airflow path of the bladeless fan. The gap structure prevents vibration transmission caused by housing contact, improving lighting stability. The perforated area provides a mounting base for the lower light source housing, ensuring synchronized movement of the light source components without affecting airflow output when the impeller rotates.

[0058] It should be noted that the above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. However, any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A bladeless fan, comprising an impeller and a housing, characterized in that, The housing has an air inlet at the top and an air outlet at the bottom. An impeller is installed inside the housing, and the inner side of the housing is a smooth surface. A drive assembly is installed at the top of the housing and is connected to the impeller. The drive assembly drives the impeller to rotate inside the housing. The impeller includes an annular frame with a through hole in the middle, upper blades, and lower blades. The upper blades are installed on the upper surface of the annular frame, and the lower blades are installed on the lower surface of the annular frame.

2. The bladeless fan according to claim 1, characterized in that, A connecting frame is installed inside the annular frame. The drive assembly includes a support frame and a motor. The motor is mounted on or inside the support frame. The support frame is installed and connected to the housing. The drive shaft of the motor is connected to the connecting frame.

3. The bladeless fan according to claim 1, characterized in that, The upper blades bend and extend outward toward the annular frame, with a portion located outside the annular frame, while the lower blades bend and extend inward toward the through-hole of the annular frame, with a portion located in the corresponding area of ​​the through-hole.

4. The bladeless fan according to claim 1, characterized in that, The orthographic projection length of the upper blade is greater than that of the lower blade.

5. The bladeless fan according to claim 1, characterized in that, The upper blade has a first inclined section, a second inclined section, and a horizontal section on the side facing the air inlet at the top of the casing. One end of the second inclined section is connected to the first inclined section, and the other end is connected to the horizontal section. The inclination angle of the first inclined section is smaller than that of the second inclined section.

6. The bladeless fan according to claim 5, characterized in that, An angle greater than 90 degrees is formed between the first inclined segment and the second inclined segment, and between the second inclined segment and the horizontal segment.

7. The bladeless fan according to claim 2, characterized in that, The connecting frame, upper blade, lower blade, and annular frame are integrally formed.

8. A lamp fixture using the bladeless fan according to any one of claims 1-7, characterized in that, An upper light source housing and a lower light source housing are installed at the air outlet of the housing. The lower light source housing is connected to the upper light source housing. An opening is provided in the central area of ​​the upper light source housing. The lower light source housing is installed in the opening area. The lower light source housing or the upper light source housing is connected to the annular frame. Light-emitting components are installed inside both the upper and lower light source housings. There is a gap between the upper light source housing and the housing.

9. The lamp according to claim 8, characterized in that, The projected surface of the upper light source housing completely obscures the impeller.

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