Filtering fan

Abstract

The embodiment of the utility model provides a filtering fan. The fan comprises an air duct and a fan body, the filter screen is arranged at an air inlet of the air duct; the detector comprises a first probe and a second probe, the first probe and the second probe are located on the first face and the second face of the filter screen respectively, the first probe is used for detecting the pressure of the first face of the filter screen, and the second probe is used for detecting the pressure of the second face of the filter screen; the controller is used for acquiring the pressure of the first surface and the pressure of the second surface of the filter screen sent by the detector and outputting reminding information according to the pressure of the first surface and the pressure of the second surface of the filter screen, and the reminding information is used for reminding a user to clean the filter screen. Therefore, a user is reminded of cleaning the filter screen in time, the phenomenon of dust accumulation and filth blockage of the filter screen is avoided, meanwhile, reduction of ventilation of the filter fan is also avoided, and the filter fan is further prevented from being damaged due to dust accumulation and filth blockage of the filter screen.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a filtering fan. Background Art

[0002] Fans have become essential household appliances. Generally, filters in the fans are used to filter dust, fluff, etc. in the air, so as to achieve the purification effect. However, with the long-term use of the fan, the filter screen will become clogged with dust. If the dust and fluff on the filter screen are not cleaned in time, the air permeability of the fan will be reduced, affecting the air volume of the fan. If the fan operates in this state for a long time, the power of the fan will increase, and then the fan will be damaged. Content of the Utility Model

[0003] In view of the above problems, embodiments of the present utility model are proposed to provide a filtering fan that can overcome or at least partially solve the above problems.

[0004] To solve the above problems, embodiments of the present utility model disclose a filtering fan, including:

[0005] An air duct;

[0006] A filter screen disposed at the air inlet of the air duct;

[0007] A detector, the detector includes a first probe and a second probe, the first probe and the second probe are respectively located on the first side and the second side of the filter screen, the first probe is used to detect the pressure on the first side of the filter screen, and the second probe is used to detect the pressure on the second side of the filter screen;

[0008] A controller, configured to obtain the pressure on the first side and the pressure on the second side of the filter screen sent by the detector, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen, where the reminder message is used to remind the user to clean the filter screen.

[0009] Optionally, a support frame is disposed in the air duct; the support frame includes a plurality of support arms, and a groove is provided on one of the support arms; a notch is provided on the first side of the groove;

[0010] The detector is fixed in the groove and partially passes through the filter screen; the detector includes a first extension arm and a second extension arm; the first extension arm passes through the notch, and the first probe is disposed at the top end of the first extension arm; the second probe is disposed at the top end of the second extension arm.

[0011] Optionally, a through hole is further provided on the first side of the groove; the filtering fan further includes:

[0012] A gasket, the gasket is located between the second side of the groove and the detector; one side of the gasket contacts the second side of the groove, and the other side of the gasket contacts the detector;

[0013] A shrapnel, the shrapnel is located in the middle of the detector; the extension of the shrapnel is stuck between the detector and the filter screen;

[0014] A fixed shaft, the fixed shaft sequentially passes through the through hole, the detector, the shrapnel and the gasket, and fixes the detector, the shrapnel and the gasket in the groove on the support frame.

[0015] Optionally, a protruding portion 61 is provided at the bottom of the fixed shaft; the protruding portion 61 includes a first surface and a second surface; a preset angle is formed between the first surface and the second surface;

[0016] The protruding portion 61 is embedded in the detector, and the first surface of the protruding portion 61 contacts one side of the detector, or the second surface of the protruding portion 61 contacts the other side of the detector.

[0017] Optionally, the filtering fan further includes:

[0018] A motor, the motor passes through the air duct and is fixed on the support frame of the air duct;

[0019] A fan blade, the output shaft of the motor passes through the fan blade;

[0020] A fan blade knob, the fan blade knob is rotatably connected to the top end of the output shaft of the motor, so that the fan blade is fixed on the output shaft of the motor through the fan blade knob.

[0021] Optionally, the filtering fan further includes:

[0022] A front net, the front net is arranged at the air outlet of the air duct and is fixedly connected to the air duct;

[0023] A rear net, the rear net is installed at the air inlet of the air duct and is fixedly connected to the air duct.

[0024] Optionally, the diameter of the rear net is larger than the diameter of the filter screen.

[0025] Optionally, the filtering fan further includes:

[0026] A support rod, the support rod is fixedly connected to the outer wall of the air duct and is used to support the air duct;

[0027] The controller is installed on the support rod.

[0028] Optionally, the filtering fan further includes:

[0029] A display, which is mounted on the support rod and is used to display the prompt information.

[0030] Optionally, the controller is configured to output a prompt message when the pressure difference between the pressure on the first side and the pressure on the second side is greater than a preset threshold.

[0031] The embodiments of the present invention have the following advantages:

[0032] The embodiments of the present invention provide a filtering fan, which includes: an air duct; a filter screen disposed at the air inlet of the air duct; a detector, the detector includes a first probe and a second probe, wherein the first probe and the second probe are respectively located on the first side and the second side of the filter screen, the first probe is used to detect the pressure on the first side of the filter screen, and the second probe is used to detect the pressure on the second side of the filter screen; a controller, which is configured to obtain the pressure on the first side and the pressure on the second side of the filter screen sent by the detector, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen, and the reminder message is used to remind the user to clean the filter screen. Thus, by detecting the pressures on the first side and the second side of the filter screen with the detector, and further outputting a prompt message by the controller according to the pressures on the first side and the second side of the filter screen, after receiving the prompt message, the user can clean the filter screen in time, avoiding the phenomenon of dust accumulation and blockage on the filter screen, and at the same time avoiding the reduction of the air permeability of the filtering fan, and further avoiding the damage of the filtering fan caused by the dust accumulation and blockage of the filter screen. Description of the Drawings

[0033] Figure 1 is a structural diagram of a filtering fan provided by an embodiment of the present invention;

[0034] Figure 2 is a structural block diagram of a detector provided by an embodiment of the present invention;

[0035] Figure 3 is a structural block diagram of an air duct provided by an embodiment of the present invention;

[0036] Figure 4 is a partial structural diagram of a filter screen fan provided by an embodiment of the present invention;

[0037] Figure 5 is a structural block diagram of a shrapnel provided by an embodiment of the present invention;

[0038] Figure 6 is a structural block diagram of a fixed shaft provided by an embodiment of the present invention;

[0039] Figure 7 is a three-dimensional exploded view of a filtering fan provided by an embodiment of the present invention.

[0040] Description of the reference numerals:

[0041] 1 - air duct, 2 - filter screen, 3 - detector, 4 - gasket, 5 - elastic piece, 6 - fixed shaft, 7 - motor, 8 - fan blade, 9 - fan blade knob, 10 - front net, 11 - rear net, 21 - support frame, 22 - groove, 23 - notch, 24 - through hole, 31 - first probe, 32 - second probe, 33 - first extension arm, 34 - second extension arm, 51 - extension part, 61 - protruding part. Detailed implementation manners

[0042] In order to make the above - mentioned objects, features, and advantages of the present utility model more obvious and understandable, the present utility model will be further described in detail below with reference to the accompanying drawings and specific implementation manners.

[0043] During the use of the filtration fan, if the dust, lint, etc. on the filter screen are not cleaned in time, the air permeability of the fan will be reduced, affecting the air volume of the fan. If the fan operates in this state for a long time, the power of the fan will increase, and further damage to the fan will be caused. Based on this, one of the core concepts of the embodiments of the present utility model is that the present utility model provides a filtration fan, which includes: an air duct; a filter screen arranged at the air inlet of the air duct; a detector, the detector includes a first probe and a second probe, wherein the first probe and the second probe are respectively located on the first side and the second side of the filter screen, the first probe is used to detect the pressure on the first side of the filter screen, and the second probe is used to detect the pressure on the second side of the filter screen; a controller, which is used to obtain the pressure on the first side and the pressure on the second side of the filter screen sent by the detector, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen, and the reminder message is used to remind the user to clean the filter screen. Thus, by detecting the pressures on the first side and the second side of the filter screen through the detector, and further outputting a prompt message by the controller according to the pressures on the first side and the second side of the filter screen, after receiving the prompt message, the user can clean the filter screen in time, avoiding the phenomenon of dust accumulation and blockage of the filter screen, and at the same time avoiding the reduction of the air permeability of the filtration fan, and further avoiding the damage of the filtration fan caused by the dust accumulation and blockage of the filter screen.

[0044] Refer to Figure 1 , which shows a structural block diagram of a filtration fan provided by an embodiment of the present utility model. The filtration fan may specifically include:

[0045] An air duct 1.

[0046] In the embodiments of the present utility model, the air duct 1 refers to the channel structure inside the filtering fan for guiding and concentrating the air flow. The design of the air duct 1 has an important impact on the performance of the filtering fan. It can help improve the efficiency of the filtering fan, reduce noise, and improve the uniformity of air flow. The air duct 1 usually includes the outer shell of the filtering fan. The shape and size of the outer shell will affect the direction and speed of the air flow. An ideal design of the air duct 1 can ensure that the air flow smoothly flows from the air inlet of the filtering fan to the air outlet, reducing air flow disorder and energy loss. For example, in an axial flow fan, the air duct 1 is usually a cylindrical channel, and the air flow flows along the axis of the fan. In a centrifugal fan, the air duct 1 is a spiral channel, and the air flow is spun out after rotating inside the fan. The design of the air duct 1 needs to consider multiple factors, including the use of the fan, the installation environment, the required air flow rate and pressure, etc. By optimizing the design of the air duct 1, the overall performance of the fan can be improved, making it more efficient, quiet, and reliable.

[0047] The material selection of the air duct 1 depends on the design, use, cost, and required performance characteristics of the fan. The following are some common materials for the air duct 1: Plastic: Plastic is one of the most commonly used materials for the fan air duct 1 because it has advantages such as low cost, light weight, and easy processing and molding. Common types of plastic include polypropylene, polyethylene, polycarbonate, and plastics. The plastic air duct 1 can be designed into various shapes to optimize the air flow and reduce noise. Metal: Metal air ducts 1 are usually used in occasions that require higher strength and durability, such as industrial fans or high-performance fans. Common metal materials include aluminum, galvanized steel, and stainless steel. Metal air ducts 1 can provide better structural support and corrosion resistance, but the cost is usually higher than that of plastic. Composite materials: Composite materials are composed of two or more materials with different properties to obtain better comprehensive performance. For example, fiberglass-reinforced plastic has good strength and corrosion resistance and is commonly used for the air duct 1 of fans in special environments. Wood: In some specially designed fans, such as retro-style or hand-made fans, wood may be used as the material for the air duct 1. The wood air duct 1 can provide a unique appearance and texture, but usually has a high cost and is not suitable for use in humid or high-temperature environments. Cardboard: In some low-cost or disposable fans, cardboard may be used as the material for the air duct 1. The cardboard air duct 1 has an extremely low cost, but poor durability and performance. When selecting the material for the air duct 1, it is necessary to comprehensively consider factors such as the performance requirements of the fan, the cost budget, the environmental conditions, and aesthetics. For example, for a fan that requires quiet operation, a material with sound-absorbing properties may be selected; while for a fan that requires high temperature resistance, a material with good heat resistance may be selected.

[0048] The filter screen 2 provided at the air inlet of the air duct 1.

[0049] In the embodiment of the present utility model, the filter screen 2 of the filter fan can be arranged at the air inlet of the air duct 1. The filter screen 2 in the filter fan of the present utility model is mainly used for the following aspects: Filtering air: The filter screen 2 can capture dust, pollen, smoke particles and other tiny pollutants in the air, thereby purifying the air and providing cleaner air flow. This is particularly important for people with allergies or users who wish to reduce indoor air pollution. Protecting the internal components of the fan: The filter screen 2 can prevent large particles of dust and debris from entering the interior of the fan, protecting the motor 7, blades and other key components of the fan from contamination and wear, and extending the service life of the fan. Reducing noise: Some filter screens 2 are designed with sound-absorbing functions, which can reduce the noise generated during the operation of the fan and provide a quieter use environment. Improving air flow: The filter screen 2 can guide and evenly distribute the air flow, improving the air flow performance of the fan, making the air supply effect of the fan more uniform and comfortable. Aesthetic decoration: The filter screen 2 can also be used as a decorative component of the fan, increasing the aesthetic appearance of the fan and making it better integrate into the indoor decoration style. The materials and designs of the filter screen 2 are diverse, including fiber materials, activated carbon, metal meshes, etc. Selecting the appropriate filter screen 2 needs to consider factors such as the use of the fan, environmental conditions, convenience of cleaning and maintenance, and cost. Regularly cleaning and replacing the filter screen 2 is crucial for maintaining the performance of the fan and the indoor air quality.

[0050] In the present utility model, the material selection of the filter screen 2 depends on the functional requirements, cost, durability, and convenience of cleaning and maintenance of the filter screen 2. The following are some common materials for the filter screen 2: Fiber materials: This is the most common material for the filter screen 2, including synthetic fibers (such as polyester fibers) and natural fibers (such as cotton). Fiber materials can be made into filter screens 2 with different densities for capturing particulate matter of different sizes. This type of filter screen 2 is usually easy to clean and replace. Activated carbon: The activated carbon filter screen 2 is mainly used to adsorb odors and harmful gases in the air, such as formaldehyde, benzene, etc. The activated carbon filter screen 2 is usually used in combination with other types of filter screens 2 to provide a more comprehensive air purification effect. Metal mesh: The metal mesh filter screen 2 is usually made of stainless steel or other corrosion-resistant metals and has good durability and structural strength. The metal mesh can capture larger particulate matter and is easy to clean, but its filtering effect on fine particles may be inferior to that of fiber materials. HEPA material: The high-efficiency particulate air (HEPA) filter screen 2 is a high-efficiency filtering material that can capture more than 99.97% of particulate matter with a diameter of 0.3 microns, including dust, pollen, smoke particles, etc. The HEPA filter screen 2 is usually used in occasions that require high-level air purification. Electrostatic fibers: The electrostatic fiber filter screen 2 uses the principle of electrostatic adsorption to capture particulate matter in the air. This type of filter screen 2 does not require chemical filter media and can be cleaned and reused repeatedly, but it may need to be electrostatically charged regularly to maintain its filtering efficiency. Composite materials: The composite filter screen 2 is composed of a combination of multiple materials, which can combine the advantages of different materials to provide a more comprehensive filtering effect. For example, some composite filter screens 2 may combine fiber materials and activated carbon to provide both particulate matter filtration and gas adsorption functions. When selecting the material of the filter screen 2, it is necessary to consider the usage environment of the fan, the expected filtering effect, the cost budget, and the convenience of cleaning and maintenance. For example, for occasions that require high-level air purification, the HEPA filter screen 2 may be selected; while for occasions that only require basic filtering functions, the fiber material filter screen 2 with a lower cost may be selected.

[0051] A detector 3, the detector 3 includes a first probe 31 and a second probe 32. The first probe 31 and the second probe 32 are respectively located on the first side and the second side of the filter screen 2. The first probe 31 is used to detect the pressure on the first side of the filter screen 2, and the second probe 32 is used to detect the pressure on the second side of the filter screen 2.

[0052] In the embodiment of the present utility model, the detector 3 can be used to detect the pressures on both sides of the filter screen 2. The detector 3 can include a first probe 31 and a second probe 32. Among them, the first probe 31 and the second probe 32 are respectively located on the first side and the second side of the filter screen 2. The first probe 31 can be used to detect the pressure on the first side of the filter screen 2, and the second probe 32 can be used to detect the pressure on the second side of the filter screen 2. As Figure 2As shown in the figure, a structural block diagram of a detector 3 provided by an embodiment of the present utility model is shown. The detector 3 includes a first extension arm 33 and a second extension arm 34. A first probe 31 is disposed at the top of the first extension arm 33, and a second probe 32 is disposed at the top of the second extension arm 34.

[0053] In one embodiment, a support frame 21 is disposed in the air duct 1; the support frame 21 includes a plurality of support arms, and a groove 22 is provided on one of the support arms; a notch 23 is provided on a first side surface of the groove 22; the detector 3 is fixed in the groove 22 and partially passes through the filter screen 2; the detector 3 includes a first extension arm 33 and a second extension arm 34; the first extension arm 33 passes through the notch 23, and the first probe 31 is disposed at the top of the first extension arm 33; the second probe is disposed at the top of the second extension arm 34.

[0054] As Figure 3 shown in the figure, a structural diagram of an air duct 1 provided by an embodiment of the present utility model is shown. A support frame 21 is disposed in the air duct 1. The support frame 21 includes a plurality of support arms, and a groove 22 is provided on one of the support arms. The detector 3 is fixed in the groove 22. A notch 23 may be provided on a first side surface of the groove 22, and the notch 23 is used for the first extension arm 33 to pass through the support arm of the support frame 21.

[0055] As Figure 4 shown in the figure, a partial structural diagram of a filter screen 2 fan provided by an embodiment of the present utility model is shown. The detector 3 is fixed in the groove 22 of the support arm on the support frame 21 and partially passes through the filter screen 2. The detection includes a first extension arm 33 and a second extension arm 34. The first extension arm 33 passes through the notch 23 on the first side surface of the groove 22, and the first probe 31 is disposed at the top of the first extension arm 33, and the second probe 32 is disposed at the top of the second extension arm 34.

[0056] In one embodiment, a through hole 24 is further provided on the first side surface of the groove 22; the fan further includes: a gasket 4, and the gasket 4 is located between the second side surface of the groove 22 and the detector 3; one side of the gasket 4 is in contact with the second side surface of the groove 22, and the other side of the gasket 4 is in contact with the detector 3; a spring piece 5, and the spring piece 5 is located in the middle of the detector 3; an extension portion 51 of the spring piece 5 is stuck between the detector 3 and the filter screen 2; a fixing shaft 6, and the fixing shaft 6 sequentially passes through the through hole 24, the detector 3, the spring piece 5 and the gasket 4 to fix the detector 3, the spring piece 5 and the gasket 4 in the groove 22 on the support frame 21.

[0057] Specifically, not only a notch 23 but also a through hole 24 are provided on the first side surface of the groove 22, and through holes are also provided on the second side surface of the groove 22. The positions of the through holes on the second side surface correspond to the position of the through hole 24 on the first side surface. As Figure 3 shown in the figure, the through hole 24 in the present utility model may be D-shaped. As Figure 4As shown in the figure, in the present utility model, the fan may further include: a gasket 4, a spring piece 5, and a fixing shaft 6. The gasket 4 may be located between the second side of the groove 22 and the detector 3. One side of the gasket 4 may be in contact with the second side surface of the groove 22, where the second side surface of the groove 22 is the side surface corresponding to the first side surface of the groove 22, and the other side of the gasket 4 is in contact with the detector 3.

[0058] In the present utility model, a gasket 4 is provided between the groove 22 of the support arm and the detector 3, which can evenly disperse the pressure between the support arm and the detector 3, reduce local stress concentration, and protect the detector 3 from damage. Moreover, the gasket 4 in the present utility model can also play a role in shock absorption and noise reduction. By absorbing vibration and sound waves, it reduces the vibration of the detector 3 when the filtering fan operates, and maintains the stability of the detector 3.

[0059] The materials of the gasket 4 in the present utility model are diverse, including rubber, plastic, metal, graphite, cardboard, etc. The selection of the appropriate gasket 4 material depends on factors such as the working environment of the equipment, the nature of the medium, temperature, pressure, etc. The correct selection and use of the gasket 4 are of great significance for ensuring the normal operation of the filtering fan and the detector 3, and for extending the service life of the filtering fan and the detector 3.

[0060] In the present utility model, the spring piece 5 is located in the middle of the detector 3, and the extension part 51 of the spring piece 5 is stuck between the detector 3 and the filter screen 2. The spring piece 5 can not only maintain the stability of the detector 3, but also keep a certain distance between the detector 3 and the filter screen 2. As Figure 5 shown, a structural block diagram of a spring piece 5 provided by an embodiment of the present utility model is shown.

[0061] In the present utility model, through the elastic action of the spring piece 5, it is ensured that the detector 3 can be firmly fixed in the groove 22 of the support frame 21 of the air duct 1 under the pressure of the filter screen 2. At the same time, during the operation of the filtering fan, the spring piece 5 can absorb part of the vibration energy through its elastic characteristics, thereby reducing noise and vibration and improving the running stability of the fan. The spring piece 5 may also play a role in safety protection. When the filtering fan is impacted by an external force, the spring piece 5 can provide a certain buffer to prevent the detector 3 from being damaged.

[0062] In the present utility model, the fixing shaft 6 can sequentially pass through the through hole 24, the detector 3, the spring piece 5, and the gasket 4, and fix the detector 3, the spring piece 5, and the gasket 4 in the groove 22 on the support frame 21. Specifically, when the fixing shaft 6 is installed in the present utility model, it first passes through the through hole 24 on the first side surface of the groove 22, then passes through one side of the detector 3, then passes through the spring piece 5, then passes through the second side of the detector 3, then passes through the gasket 4, and finally passes through the through hole on the second side surface in the thick groove 22.

[0063] In the embodiment of the present utility model, a protruding portion 61 is provided at the bottom of the fixed shaft 6; the protruding portion 61 includes a first surface and a second surface; a preset angle is formed between the first surface and the second surface; the protruding portion 61 is embedded in the detector 3, and the first surface of the protruding portion 61 contacts one surface of the detector 3, or the second surface of the protruding portion 61 contacts the other surface of the detector 3.

[0064] In the present utility model, the material selection of the fixed shaft 6 has an important impact on the performance, durability and cost of the fan. In practical applications, the fixed shaft 6 made of different materials can be selected according to actual needs. The following are some common materials for the fan fixed shaft 6: Stainless steel: Stainless steel is a commonly used material because it has good corrosion resistance, strength and hardness. The stainless steel shaft can withstand higher loads and is suitable for high-performance or industrial-grade fans. Carbon steel: The carbon steel shaft has high strength and rigidity, and the cost is relatively low. However, carbon steel is prone to rust, so surface treatment such as galvanizing or coating is usually required to improve its corrosion resistance. Aluminum alloy: The aluminum alloy shaft is light in weight and has good thermal conductivity and corrosion resistance. The aluminum alloy shaft is usually used in fan designs that are sensitive to weight or require good heat dissipation performance. Copper: The copper shaft has excellent thermal conductivity and electrical conductivity, but the cost is high. The copper shaft is usually used in special applications, such as high-performance fans that require good heat dissipation. Plastic: In some low-cost or lightweight fans, plastic shafts may be used. The plastic shaft is light in weight and low in cost, but its strength and durability are usually not as good as those of metal shafts. When selecting the material of the fixed shaft 6, the design requirements of the fan, the expected load, environmental conditions (such as humidity, temperature), cost budget and the required maintenance level need to be considered. For example, for a filter fan that needs to be used in a humid environment, a stainless steel or aluminum alloy shaft with good corrosion resistance may be selected; for cost-sensitive applications, a carbon steel or plastic shaft may be selected.

[0065] Such as Figure 6As shown in the figure, a structural block diagram of a fixed shaft 6 provided by an embodiment of the present utility model is shown. In the present utility model, the through hole 24 provided in the groove 22 on the support frame 21 may be D-shaped, and the bottom of the fixed shaft 6 may also be D-shaped, corresponding to the through hole 24, so that the bottom of the fixed shaft 6 can be fixed in the through hole 24. A certain angle is formed between the first surface and the second surface of the protruding portion 61 of the fixed shaft 6. When the fixed shaft 6 passes through the detector 3, the first surface of the protruding portion 61 contacts one surface of the detector 3, or the second surface of the protruding portion 61 contacts the other surface of the detector 3. When the fixed shaft 6 needs to fix the detector 3, if the first surface of the protruding portion 61 contacts one surface of the detector 3, then when it needs to be removed, it can be removed when the second surface of the protruding portion 61 contacts the other surface of the detector 3. Or, when the fixed shaft 6 needs to fix the detector 3, if the second surface of the protruding portion 61 contacts the other surface of the detector 3, then when the detector 3 needs to be removed, it can be removed when the first surface of the protruding portion 61 contacts one surface of the detector 3.

[0066] When the user needs to take out the filter screen 2, the extension portion 51 of the elastic piece 5 will lose its limit, and the inner edge of the filter screen 2 will drive the detector 3 to rotate. The detector 3 tilts upward, and the filter screen 2 can be easily taken out without being stuck. After one surface of the detector 3 contacts the first surface of the protruding portion 61, it stops. At this time, it is the maximum rotation angle of the detector 3. When installing the filter screen 2, it is in the reverse order. The inner edge of the filter screen 2 is pressed down on the elastic piece 5, the other surface of the elastic piece 5 presses the detector 3, driving the detector 3 to rotate. After the filter screen 2 is installed, the detector 3 returns to the initial position. After the other surface of the detector 3 contacts the second surface of the protruding portion 61, it stops, preventing the detector 3 from continuing to rotate due to gravity, inertia, etc., thereby fixing the detector 3.

[0067] In one embodiment, the filtering fan further includes: a motor 7, the motor 7 passes through the air duct 1 and is fixed on the support frame 21 of the air duct 1; a wind blade 8, the output shaft of the motor 7 passes through the wind blade 8; a wind blade knob 9, the wind blade knob 9 is rotatably connected to the top end of the output shaft of the motor 7, so that the wind blade 8 is fixed on the output shaft of the motor 7 through the wind blade knob 9.

[0068] As Figure 7As shown in the figure, a three-dimensional exploded view of a filtering fan provided by an embodiment of the present invention is shown. The filtering fan may further include a motor 7. The motor 7 can pass through the air duct 1 and is fixed to the support frame 21 of the air duct 1 to prevent the motor 7 from vibrating or displacing during operation. The filtering fan may further include a fan blade 8. A perforation may be provided in the middle of the fan blade 8. The output shaft of the motor 7 can pass through the perforation of the fan blade 8, thereby passing through the fan blade 8. So that when the motor 7 is operating, the fan blade 8 is driven to rotate by the output shaft of the motor 7. The filtering fan may further include a fan blade knob 9. The fan blade knob 9 is rotatably connected to the top end of the output shaft of the motor 7, so that the fan blade 8 can be fixed to the output shaft of the motor 7 through the fan blade knob 9. So that when the motor 7 drives the fan blade 8 to rotate, the fan blade 8 does not slip or vibrate.

[0069] In one embodiment, the filtering fan further includes: The fan further includes: a front net 10. The front net 10 is arranged at the air outlet of the air duct 1 and is fixedly connected to the air duct 1; a rear net 11. The rear net 11 is installed at the air inlet of the air duct 1 and is fixedly connected to the air duct 1.

[0070] As Figure 7 shown, in the present invention, the filtering fan may further include a front net 10. The front net 10 is arranged at the air outlet of the air duct 1 and is fixedly connected to the air outlet. The front net 10 is provided to prevent a person's hand from reaching into the air duct 1 or the fan blade 8, ensuring the safe use of the filtering fan, and also preventing foreign objects from entering the fan blade 8 or the air duct 1 and damaging the filtering fan. In the present invention, the filtering fan may further include a rear net 11. The rear net 11 is arranged at the air inlet of the air duct 1 and is fixedly connected to the air inlet. The rear net 11 is provided to prevent a person's hand from reaching into the air duct 1 or the fan blade 8, ensuring the safe use of the filtering fan, and also preventing foreign objects from entering the fan blade 8 or the air duct 1 and damaging the filtering fan.

[0071] In an embodiment of the present invention, the diameter of the rear net 11 is larger than the diameter of the filter screen 2. The filter screen 2 can be arranged on the inner wall of the air duct 1. The rear net 11 is arranged at the air inlet of the air duct 1 and is fixedly connected to the outer ring of the air inlet, so that the rear net 11 covers the filter screen 2 in the air duct 1.

[0072] A controller (not shown in the figure) is configured to obtain the pressure on the first side and the pressure on the second side of the filter screen 2 sent by the detector 3, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen 2. The reminder message is used to remind the user to clean the filter screen 2.

[0073] In an embodiment of the present utility model, the controller can be connected to the detector 3 by wires or other means. The specific connection method is not specifically limited herein in the present utility model. The function of connecting the controller to the detector 3 is to enable the controller to obtain the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2 sent by the detector 3. After the controller obtains the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2 sent by the detector 3, it can output a reminder message according to the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2, thereby reminding the user to clean the filter screen 2 in time, avoiding the phenomenon of dust accumulation and blockage of the filter screen 2, and at the same time avoiding the reduction of the air permeability of the filtering fan, and further avoiding the damage of the filtering fan caused by the dust accumulation and blockage of the filter screen 2.

[0074] In one embodiment, the filtering fan may further include: a support rod (not shown in the figure), the support rod is fixedly connected to the outer wall of the air duct 1 for supporting the air duct 1; the controller is installed on the support rod.

[0075] In the present utility model, the support rod is fixedly connected to the outer wall of the air duct 1, which can support the air duct 1 to a certain height, providing more demand experiences for users. The user can adjust the height of the support rod, thereby adjusting the air outlet direction of the filtering fan. A controller can be installed on the support rod. The controller can obtain the pressure on the first side of the filter screen 2 detected by the first probe 31 and the pressure on the second side of the filter screen 2 detected by the second probe 32, and output a reminder message according to the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2, thereby reminding the user to clean the filter screen 2 in time, avoiding the phenomenon of dust accumulation and blockage of the filter screen 2, and at the same time avoiding the reduction of the air permeability of the filtering fan, and further avoiding the damage of the filtering fan caused by the dust accumulation and blockage of the filter screen 2.

[0076] In the present utility model, the support rod is an important component connecting the base and the air duct 1 of the filtering fan. It is responsible for supporting the weight of the entire filtering fan and allowing the filtering fan to be height-adjustable. The material selection of the support rod is usually based on the following factors: Strength and stability: The support rod needs to have sufficient strength and stability to support the weight of the fan head and blades, ensuring that the fan does not shake or topple during use. Portability: To facilitate handling and installation, the support rod usually selects relatively lightweight materials, especially for fans used at home or in the office. Corrosion resistance: The support rod may be exposed to different environments, including humid environments, so it needs to have a certain degree of corrosion resistance. Cost: The cost of the material is also an important consideration, especially for fans produced in large quantities.

[0077] In one embodiment, the filtering fan may further include: a display (not shown in the figure), the display is installed on the support rod, and the display is used to display the prompt message.

[0078] In the present utility model, a display can also be installed on the support rod. The display can be connected to the controller. When the controller outputs a reminder message based on the pressure on the first side and the pressure on the second side of the filter screen 2, the reminder message can be sent to the display for display, thereby reminding the user to clean the filter screen 2 in a timely manner, avoiding the phenomenon of dust accumulation and blockage on the filter screen 2, and at the same time avoiding the reduction of the air permeability of the filter fan, and further avoiding the damage of the filter fan caused by the dust accumulation and blockage on the filter screen 2. It should be noted that the display in the present utility model can be an indicator light. For example, when the controller outputs a reminder message based on the pressure on the first side and the pressure on the second side of the filter screen 2, the indicator light can be controlled to light up, thereby reminding the user to clean the filter screen 2 in a timely manner.

[0079] In one embodiment, the controller is configured to output a prompt message when the pressure difference between the pressure on the first side and the pressure on the second side is greater than a preset threshold.

[0080] In the present utility model, when the filter fan is operating, the controller can obtain in real time the pressure on the first side and the pressure on the second side of the filter screen 2 sent by the detector 3. When the pressure difference between the pressure on the first side and the pressure on the second side of the filter screen 2 is greater than a preset threshold, it indicates that there is a phenomenon of dust accumulation and blockage on the filter screen 2 at this time. At this time, a prompt message can be output to prompt the user to clean the filter screen 2 in a timely manner.

[0081] In one embodiment, the filter fan may further include a base (not shown in the figure). The base is fixedly connected to the support, providing a stable base for the filter fan to ensure that the filter fan will not tip over or shake during use, thereby ensuring the safe and stable operation of the fan. The base of the filter fan in the present utility model is designed with a function of adjustable height, and the user can adjust the height of the fan according to needs to obtain the best air circulation effect and comfort. The base of the filter fan allows the fan to rotate horizontally (oscillation function), so that the filter fan can blow air in multiple directions, expanding the range of air circulation and improving the use efficiency of the fan. The materials and designs of the base are diverse. Common materials include plastics, metals (such as cast iron, aluminum alloy), etc. The design of the base needs to consider the use of the fan, weight distribution, stability requirements, and user operation convenience. A solid and reasonably designed base is crucial for improving the overall performance and user experience of the fan.

[0082] To better understand the embodiments of the present utility model, the working principle of the filter fan in the present utility model will now be described. After the filter fan is powered on and operates, the motor 7 will start to rotate, and the output shaft of the motor 7 drives the fan blade 8 to rotate for air supply. The first probe 31 on the first side of the filter screen 2 will detect the pressure on the first side of the filter screen 2, that is, the pressure on the side of the filter screen 2 facing the fan blade 8. The second probe 32 on the second side of the filter screen 2 will detect the pressure on the second side of the filter screen 2, that is, the pressure on the side of the filter screen 2 facing away from the fan blade 8. The first probe 31 and the second probe 32 can send the detected pressure to the controller. In the initial state, when the filter screen 2 is not in use, that is, when the fan blade 8 is not rotating, the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2 should be the same, that is, the pressure difference between the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2 is zero. However, as the usage time of the filter fan increases, the dust and other impurities on the filter screen 2 will also increase, and the pressure difference between the pressure on the first side of the filter screen 2 and the pressure on the second side of the filter screen 2 will gradually change. When the pressure difference reaches the preset threshold, the controller can feedback a signal and output a reminder message to remind the user to clean the filter screen 2 in time.

[0083] In the embodiments of the present utility model, the filter fan includes an air duct; a filter screen provided at the air inlet of the air duct; a detector, the detector includes a first probe and a second probe, the first probe and the second probe are respectively located on the first side and the second side of the filter screen, the first probe is used to detect the pressure on the first side of the filter screen, and the second probe is used to detect the pressure on the second side of the filter screen; a controller, which is used to obtain the pressure on the first side and the pressure on the second side of the filter screen sent by the detector, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen, and the reminder message is used to remind the user to clean the filter screen. Thereby, it reminds the user that the filter screen needs to be cleaned in time, avoiding the phenomenon of dust accumulation and blockage of the filter screen, and at the same time avoiding the reduction of the air permeability of the filter fan, and further avoiding the damage of the filter fan caused by the dust accumulation and blockage of the filter screen.

[0084] Each embodiment in this specification is described in a progressive manner. The key points of each embodiment are the differences from other embodiments. The same and similar parts among the embodiments can be referred to each other.

[0085] Although the preferred embodiments of the embodiments of the present utility model have been described, those skilled in the art can make additional changes and modifications once they know the basic creative concepts. Therefore, the appended claims are intended to be construed to include the preferred embodiments and all changes and modifications falling within the scope of the embodiments of the present utility model.

[0086] Finally, it should also be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or terminal device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent in such process, method, article or terminal device. Without further limitation, an element defined by the statement "comprising an..." does not exclude the presence of additional identical elements in the process, method, article or terminal device comprising the said element.

[0087] The above has introduced in detail a filtering fan provided by the present utility model. Specific examples are used in this text to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those of ordinary skill in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A filtering fan, characterized in that, Comprising: Air duct; A filter screen disposed at the air inlet of the air duct; A detector, the detector includes a first probe and a second probe, the first probe and the second probe are respectively located on the first side and the second side of the filter screen, the first probe is used to detect the pressure on the first side of the filter screen, and the second probe is used to detect the pressure on the second side of the filter screen; A controller, configured to obtain the pressure on the first side and the pressure on the second side of the filter screen sent by the detector, and output a reminder message according to the pressure on the first side and the pressure on the second side of the filter screen, the reminder message is used to remind the user to clean the filter screen.

2. The filtering fan according to claim 1, wherein A support frame is disposed in the air duct; the support frame includes a plurality of support arms, and a groove is provided on one of the support arms; a notch is provided on the first side of the groove; The detector is fixed in the groove and partially passes through the filter screen; the detector includes a first extension arm and a second extension arm; the first extension arm passes through the notch, and the first probe is disposed at the top of the first extension arm; the second probe is disposed at the top of the second extension arm.

3. The filtering fan according to claim 2, wherein, A through hole is further provided on the first side of the groove; the filtering fan further includes: A gasket, the gasket is located between the second side of the groove and the detector; one side of the gasket is in contact with the second side of the groove, and the other side of the gasket is in contact with the detector; A spring piece, the spring piece is located in the middle of the detector; the extending portion of the spring piece is stuck between the detector and the filter screen; A fixing shaft, the fixing shaft sequentially passes through the through hole, the detector, the spring piece and the gasket, and fixes the detector, the spring piece and the gasket in the groove on the support frame.

4. The filtering fan according to claim 3, wherein A protruding portion is provided at the bottom of the fixing shaft; the protruding portion includes a first surface and a second surface; a preset angle is formed between the first surface and the second surface; The protruding portion is embedded in the detector, and the first surface of the protruding portion is in contact with one surface of the detector, or the second surface of the protruding portion is in contact with the other surface of the detector.

5. The filtering fan according to claim 2, wherein The filtering fan further includes: A motor, the motor passes through the air duct and is fixed on the support frame of the air duct; A wind blade, the output shaft of the motor passes through the wind blade; A wind blade knob, the wind blade knob is rotatably connected to the top end of the output shaft of the motor, so that the wind blade is fixed on the output shaft of the motor through the wind blade knob.

6. The filtering fan according to claim 1, wherein The filtering fan further includes: A front net, the front net is disposed at the air outlet of the air duct and is fixedly connected to the air duct; A rear net, the rear net is installed at the air inlet of the air duct and is fixedly connected to the air duct.

7. The filtering fan according to claim 6, wherein The diameter of the rear net is larger than the diameter of the filter screen.

8. The filtering fan according to claim 1, wherein The filtering fan further includes: A support rod, the support rod is fixedly connected to the outer wall of the air duct and is used to support the air duct; The controller is installed on the support rod.

9. The filtering fan according to claim 8, characterized in that, The filtering fan further includes: A display, the display is installed on the support rod, and the display is used to display a prompt message.

10. The filtering fan according to claim 1, wherein The controller is configured to output a prompt message when the pressure difference between the pressure on the first side and the pressure on the second side is greater than a preset threshold value.

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