A new type of air purification bladeless fan
By incorporating a filter device within a recess in the bladeless fan's rear housing and designing a removable rear cover, the problems of poor air purification performance and difficult maintenance associated with bladeless fans are solved. This achieves convenient air purification and maintenance, while enhancing user experience and equipment safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHONGSHAN CHUNKAI ELECTRONICS CO LTD
- Filing Date
- 2025-06-03
- Publication Date
- 2026-06-02
Smart Images
Figure CN224315208U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of bladeless fan technology, specifically to a novel bladeless air-purifying fan technology. Background Technology
[0002] Bladeless fans offer advantages such as safety, ease of cleaning, and a variety of designs. However, most bladeless fans on the market currently lack a self-cleaning function in their internal air duct structure, failing to effectively purify the air. They tend to blow dust, germs, pet hair, and other contaminants everywhere. With prolonged use, the internal structure can easily accumulate dust and mold, emitting harmful gases that can trigger respiratory illnesses. The impact is even more severe for sensitive groups such as mothers and infants, children, and those with rhinitis.
[0003] Bladeless fans, compared to traditional fans, have a relatively limited air inlet, making it easier to install air purification devices. However, the air purification function of existing bladeless fans, especially in the design of the filter, still needs improvement. In the past, to ensure purification efficiency, both axial and centrifugal fans used a filter design that covered the air inlet of the casing. This meant the filter was located between the fan inlet and the casing, requiring disassembly of the casing for replacement and cleaning. This can cause confusion for ordinary consumers and may even pose a risk of damaging the equipment. Summary of the Invention
[0004] To address the aforementioned issues, this application proposes a novel bladeless air purifier fan. By optimizing the design of the air filter installation method, it makes the fan easier to disassemble and install, thereby simplifying the maintenance process and improving user convenience.
[0005] To achieve the above objectives, the present application adopts the following technical solution:
[0006] A novel bladeless air purifier fan includes a front shell with an air outlet and a rear shell with an air inlet. A centrifugal fan with its air inlet facing the air inlet and its air outlet facing the air outlet is disposed between the front shell and the rear shell. The air outlet of the centrifugal fan is provided with an inner cover to guide the air outlet direction.
[0007] The rear shell is provided with a groove that at least covers the air inlet end of the centrifugal fan, and the bottom of the groove is provided with a plurality of first ventilation holes;
[0008] It also includes a filter device disposed within the groove and a rear cover that detachably covers the groove from the outside, the rear cover having a plurality of second ventilation holes.
[0009] Thus, by providing a groove on the outer side of the rear casing that covers the air inlet of the centrifugal fan, and forming a ventilated channel space within the groove through the first and second ventilation holes, a filter device can be installed in this channel space. This allows for thorough filtration of the incoming air, and during maintenance, the filter device can be replaced directly from the rear cover without disassembling the rear casing, improving maintenance convenience.
[0010] In some possible implementations, the filtration device includes a HEPA filter.
[0011] In some possible implementations, the filtration device may further include an activated carbon filter preceding the HEPA filter.
[0012] In some possible implementations, the filtration device may further include a washable pre-filter located at the air inlet.
[0013] In some possible implementations, the flow area of the first ventilation hole is greater than that of the second ventilation hole.
[0014] In some possible implementations, the rear housing has a plurality of third ventilation holes on the outer periphery of the groove.
[0015] In some possible implementations, the groove is square.
[0016] In some possible implementations, the outer periphery of the groove is provided with a plurality of reinforcing ribs. Attached Figure Description
[0017] Figure 1 This is a front view schematic diagram of the bladeless air-purifying fan of this application;
[0018] Figure 2 This is a rear view of the bladeless air-purifying fan of this application.
[0019] Figure 3 This is an exploded view of the bladeless air-purifying fan of this application;
[0020] Figure 4 This is a schematic diagram of the centrifugal fan installation status;
[0021] Figure 5 This is a schematic diagram of the interior view of the rear shell. Detailed Implementation
[0022] The following examples further illustrate the features of this application and other related features in detail, so as to facilitate understanding by those skilled in the art:
[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions in the attached diagrams, while the terms “bottom surface,” “top surface,” “inner,” and “outer” refer to the directions toward or away from the geometric center of a specific component, respectively.
[0024] Furthermore, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" 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 direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this case based on the specific circumstances.
[0025] Please refer to Figures 1 to 4 The novel bladeless air-purifying fan of this application includes a front shell 1 and a rear shell 2, wherein the front shell 1 is provided with an air outlet 100, and the rear shell 2 is provided with an air inlet 200. The fan is built into the space between the front shell 1 and the rear shell 2, forming a bladeless fan. Commonly used fans in the field of bladeless fans include axial fans and centrifugal fans. Although axial fans perform well in applications with high flow rate and low resistance, the design of the bladeless fan in this application, which integrates air purification function, makes centrifugal fans, with their high static pressure and uniform airflow distribution, more suitable. The range of the corresponding air inlet 200 is also relatively more controllable.
[0026] Therefore, this application also includes a centrifugal fan 3 disposed between the front shell 1 and the rear shell 2, with its air inlet 31 facing the air inlet 200 and its air outlet 32 facing the air outlet 100. In this case, the air outlet 100 is actually facing forward, while the air outlet 32 is facing upward. Therefore, an inner cover 4 is provided at the air outlet 32 to guide the airflow direction. That is, the inner cover 4 actually acts as an air guide cover, guiding the upward-facing airflow from the centrifugal fan 3 to be blown out from the air outlet 100.
[0027] At this time, the rear shell 2 is provided with a groove 5 that can at least cover the air inlet end 31 of the centrifugal fan 3. The bottom of the groove 5 is provided with a plurality of first ventilation holes 51, and its side is a solid outer frame. Specifically, the bottom of the groove 5 is fitted and sealed with the air inlet end 31 of the centrifugal fan 3, which can be in the form of a sealing ring, etc., and there is no specific limitation thereto.
[0028] On the outer side of the groove 5, that is, at the rear end of the entire bladeless fan, there is a removable rear cover 6 that covers the groove 5. The rear cover 6 has multiple second ventilation holes 61. At this time, the rear cover 6 has a continuous shape with the rear shell 2 in appearance. For example, it maintains the same plane when it is a planar structure, and when the rear shell 2 is curved, it maintains the streamlined shape that connects with it. As for the detachable method, it can be a bottom snap-fit, an upper snap-fit, or a magnetic structure. These are all common structures for installing the rear cover 6, and no specific limitation is made. Considering the damage caused by children using it, a screw fixing method can also be considered. Since the bottom of the groove 5 is isolated from the centrifugal fan 3 through the first ventilation hole 51, the detachable method described above can be used. This application does not make a specific limitation on this.
[0029] At this time, a ventilated channel space is formed in the groove 5 through the first ventilation hole 51 and the second ventilation hole 61. A filter device 7 is installed in the groove 5, that is, in this channel space. This allows the incoming air to be fully filtered, and during maintenance, the filter device 7 can be replaced directly on the rear cover 6 without disassembling the rear cover 2, thus improving maintenance convenience.
[0030] Preferably, the filtration device 7 includes a HEPA (High Efficiency Particulate Air Filter) filter. HEPA filters are typically made of synthetic fibers (such as glass fiber or polypropylene), which have good flexibility and ductility, allowing them to be processed into various shapes without compromising their filtration efficiency. Secondly, modern HEPA filter designs are not limited to traditional flat plate forms; they can also be formed into complex three-dimensional structures through folding, rolling, etc. Therefore, given this characteristic, the internal space of the groove 5 can be relatively easily adapted within the limited space corresponding to the air inlet 31 of the centrifugal fan 3. Of course, its structure can also be limited by setting a flat plate structure.
[0031] In some embodiments, an activated carbon filter can be used in conjunction with the HEPA filter. Placing the activated carbon filter at the front end can remove volatile organic compounds (VOCs) and odors from the air. This not only helps improve air quality but also reduces the impact of these substances on the HEPA filter, extending its lifespan. Activated carbon filters are a very mature method for air purification and can handle various application scenarios. Their installation methods will not be detailed here.
[0032] In some embodiments, the filter device 7 further includes a removable and washable pre-filter disposed at the air inlet front end to extend the service life of the HEPA filter. The pre-filters described in the air purification field are mainly composed of materials such as non-woven fabric, nylon mesh, activated carbon filter media, and metal mesh, primarily used to filter dust particles larger than 5μm and protect the downstream filtration system. One of their characteristics is that they are removable, washable, and reusable.
[0033] Further, please refer to Figure 3 and Figure 5 In a preferred embodiment, the flow area of the first ventilation hole 51 is larger than that of the second ventilation hole 61. Specifically, the second ventilation hole 61 is an aesthetic component and can be a round hole shape that takes into account aesthetics, while the first ventilation hole 51 can be a grille-like design, which typically has a larger open area and provides lower airflow resistance compared to a round hole of the same size. This helps reduce energy loss during airflow, allowing more air to enter the centrifugal fan 3 more efficiently.
[0034] In order to improve the heat dissipation effect inside the bladeless fan, multiple third ventilation holes 21 are provided on the outer periphery of the groove 5 on the rear shell 2. The third ventilation holes 21 can adopt the same design as the second ventilation holes 61.
[0035] Preferably, considering the ease of replacement and versatility of the filter device 7, the groove 5 for installing it is square, and multiple reinforcing ribs 22 are provided on the outer periphery of the groove 5.
[0036] As stated above, this case protects a novel bladeless air-purifying fan, and all technical solutions that are the same as or similar to this case should be considered to fall within the scope of protection of this case.
Claims
1. A novel bladeless air-purifying fan, characterized in that, It includes a front shell (1) with an air outlet (100) and a rear shell (2) with an air inlet (200). A centrifugal fan (3) is provided between the front shell (1) and the rear shell (2), with its air inlet end (31) facing the air inlet (200) and its air outlet end (32) facing the air outlet (100). The air outlet end (32) of the centrifugal fan (3) is provided with an inner cover (4) to guide the air outlet direction. The rear shell (2) is provided with a groove (5) that at least covers the air inlet end (31) of the centrifugal fan (3), and the bottom of the groove (5) is provided with a plurality of first ventilation holes (51). It also includes a filter device (7) disposed in the groove (5) and a rear cover (6) that detachably covers the groove (5) on the outside of the groove (5), the rear cover (6) having a plurality of second ventilation holes (61).
2. The novel bladeless air-purifying fan as described in claim 1, characterized in that, The filtration device includes a HEPA filter.
3. A novel bladeless air-purifying fan as described in claim 2, characterized in that, The filtration device also includes an activated carbon filter in front of the HEPA filter.
4. A novel bladeless air-purifying fan as described in claim 3, characterized in that, The filtration device also includes a removable and washable pre-filter located at the air inlet.
5. A novel bladeless air-purifying fan as described in claim 1, characterized in that, The flow area of the first ventilation hole (51) is greater than that of the second ventilation hole (61).
6. A novel bladeless air-purifying fan as described in claim 1, characterized in that, The rear shell (2) has multiple third ventilation holes (21) on the outer periphery of the groove (5).
7. A novel bladeless air-purifying fan as described in claim 1, characterized in that, The groove (5) is square.
8. A novel bladeless air-purifying fan as described in claim 7, characterized in that, The outer periphery of the groove (5) is provided with multiple reinforcing ribs (22).