Fan

Abstract

The invention provides a fan which comprises a shell assembly, an air inlet and an air outlet are formed in the shell assembly, an air flue is arranged in the shell assembly, and the air flue communicates with the air inlet and the air outlet; the fan blade group is arranged in the air duct, the fan blade group is used for supplying air from the air inlet to the air outlet, and the fan blade group comprises first fan blades; the purification part is arranged in the air duct, located on one side of the fan blade set and at least used for purifying formaldehyde and volatile organic compounds; in the axial direction perpendicular to the first fan blade, the minimum distance from the point on the outer edge of the first fan blade to the inner wall face of the air duct is larger than the minimum distance from the point on the outer edge of the purification piece to the inner wall face of the air duct, and the purification efficiency is effectively improved while the air outlet performance of the fan is guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the fan technical field, and in particular, relates to a fan. BACKGROUND

[0002] In the related art, a fan is provided with a filtering device and a fan blade. Due to the fluid characteristics of the fan blade, no or little air passes through the middle area of the filtering device, and only the periphery of the filtering device can play a purifying role, resulting in poor filtering effect of the filtering device. SUMMARY

[0003] The present application aims to at least solve one of the technical problems existing in the prior art or related art.

[0004] To this end, the present application provides a fan.

[0005] Therefore, the present application provides a fan, which comprises a housing assembly, an inlet and an outlet provided on the housing assembly, a wind channel provided in the housing assembly, the wind channel being in communication with the inlet and the outlet, a fan blade set provided in the wind channel, the fan blade set being used for sending air from the inlet to the outlet, the fan blade set comprising a first fan blade, a purifying member provided in the wind channel, the purifying member being located at one side of the fan blade set, the purifying member being used for purifying at least formaldehyde and volatile organic compounds, and the minimum distance from a point on the outer edge of the first fan blade to the inner wall surface of the wind channel being greater than the minimum distance from a point on the outer edge of the purifying member to the inner wall surface of the wind channel along the axis perpendicular to the first fan blade.

[0006] The fan provided by the present application comprises a housing assembly, a fan blade set and a purifying member. The housing assembly is provided with an inlet and an outlet, and the housing assembly is provided with a wind channel, the wind channel being in communication with the inlet and the outlet.

[0007] The fan blade set and the purifying member are both provided in the wind channel, and the purifying member is located at one side of the fan blade set, i.e., the purifying member is arranged opposite to the fan blade set, and the airflow flows through the purifying member to purify harmful substances (such as formaldehyde and volatile organic compounds, etc., which are not listed here) in the air by using the purifying member, so that the fan not only has the function of sending air, but also has the function of purifying harmful substances in the air, and can purify the air and enrich the use function of the fan.

[0008] Further, the fan blade set comprises a first fan blade, wherein the first fan blade is coaxially arranged with the air duct (i.e., the first fan blade has the same axial position as the air duct). Along the axial direction perpendicular to the first fan blade, the minimum distance between a point on the outer edge of the first fan blade and the inner wall surface of the air duct is greater than the minimum distance between a point on the outer edge of the purification component and the inner wall surface of the air duct. That is, the first fan blade and the purification component are respectively cut along the axial direction perpendicular to the first fan blade, and in the cross section, the area of the region enclosed by the contour line of the first fan blade is smaller than the area of the region enclosed by the contour line of the purification component. In other words, along the axial direction of the first fan blade, the orthogonal projection of the first fan blade on the purification component is located inside the outer edge of the purification component.

[0009] Therefore, the first fan blade is arranged opposite to the central region of the purification component. The fan can cause a local air flow low pressure region when working, thereby increasing the air flow of the central region.

[0010] According to the Bernoulli equation and the continuity equation, the velocity and pressure of a fluid are inversely proportional during flow. The rotation of the fan blade set drives the air flow, which changes the density of the air. Based on the negative pressure effect, when the first fan blade arranged opposite to the central region of the purification component rotates, the surrounding air molecules are subjected to an impact force. The mechanical energy of rotation is converted into the kinetic energy of the air. The local air molecules form a whole flow. The air density in the region decreases, and a relative low pressure region is formed. The high pressure region formed on one side of the first fan blade and the purification component pushes the air to flow to the low pressure region, thereby forming an air flow with a certain flow rate in the local region. The air behind the purification component is sucked (i.e., "self-suctioned"), and the air flows through the purification component to complete the purification.

[0011] Based on the above principle, that is, the first fan blade arranged opposite to the central region of the purification component rotates rapidly, which can convert the mechanical energy of rotation into the kinetic energy of the air. The problem of high wind resistance caused by the purification component can be solved, and the decline in the blowing performance of the fan blade set caused by the increase in the purification component can be effectively avoided. The problem of uneven purification coverage of the filter device caused by the fluid characteristics of the fan blade in the related art can be solved. The fan blowing performance is ensured, and the purification efficiency is effectively improved.

[0012] It can be understood that the purification component has a central region and a peripheral region. The peripheral region is connected to the circumferential side of the central region, and the peripheral region surrounds the central region.

[0013] According to the fan described above, the following additional technical features can also be provided.

[0014] In some embodiments, optionally, the fan blade set further comprises a second fan blade, and the first fan blade and the second fan blade are coaxially arranged. The maximum distance between any two points on the outer edge of the first fan blade is denoted as d1, and the maximum distance between any two points on the outer edge of the second fan blade is denoted as d2, and d1

[0015] In this embodiment, the structure of the fan blade group is further defined, specifically, the fan blade group further comprises a second fan blade. The first fan blade and the second fan blade are coaxially arranged. The maximum distance between any two points on the outer edge of the first fan blade is denoted as d1, and the maximum distance between any two points on the outer edge of the second fan blade is denoted as d2, d1 < d2. That is, the rotation radius of the first fan blade is smaller than the rotation radius of the second fan blade. In other words, along the axial direction perpendicular to the first fan blade, the distance from the first fan blade to the wall surface of the air duct is greater than the distance from the second fan blade to the wall surface of the air duct. Therefore, the fan blade group comprises at least two fan blades of different specifications.

[0016] The present application provides first fan blades and second fan blades of different specifications, and along the axial direction perpendicular to the first fan blade, the minimum distance from a point on the outer edge of the first fan blade to the wall surface of the air duct is greater than the minimum distance from a point on the outer edge of the purification element to the wall surface of the air duct. In this way, when the fan blade group is working, the first fan blade can drive the airflow to pass through the central region of the purification element. Since the rotation radius of the second fan blade is greater than the rotation radius of the first fan blade, the second fan blade can drive the airflow to pass through the peripheral region of the purification element. That is, the first fan blade and the second fan blade cooperate with each other to enable the airflow to flow through the central region and the peripheral region of the purification element, so that the airflow can uniformly pass through the entire purification element, thereby fully utilizing the purification element and improving the filtering effect of the purification element and the use performance and market competitiveness of the fan.

[0017] In some embodiments, optionally, the first fan blade is located between the second fan blade and the purification element.

[0018] In this embodiment, the cooperation structure of the first fan blade, the second fan blade and the purification element is further defined.

[0019] The first fan blade is located between the second fan blade and the purification element, that is, along the axial direction of the first fan blade, the first fan blade is located between the second fan blade and the purification element. That is, the first fan blade is closer to the purification element than the second fan blade. This arrangement can ensure that the airflow is effectively guided to flow through the central region and the peripheral region of the purification element.

[0020] If the second fan blade is located between the first fan blade and the purification element, most of the airflow is guided to the peripheral region of the purification element, and only a small part of the airflow flows through the central region of the purification element, which can reduce the purification efficiency of the purification element.

[0021] In some embodiments, optionally, the minimum distance between a point on the first vane towards the purification element and a point on the purification element towards the first vane is less than or equal to the minimum distance between a point on the second vane towards the purification element and a point on the purification element towards the second vane. That is, the first vane is located between the second vane and the purification element, and the first vane is closer to the purification element than the second vane, so as to reduce the kinetic energy loss of the air flow passing through the central region of the purification element, and to obtain a higher kinetic energy utilization rate.

[0022] In some embodiments, the position relationship between the purification element and the vane group is further defined, optionally, the minimum distance between a point on the first vane towards the purification element and a point on the purification element towards the first vane is less than or equal to the minimum distance between a point on the first vane towards the second vane and a point on the second vane towards the first vane. That is, the spacing between the first vane and the purification element is less than or equal to the spacing between the first vane and the second vane, so as to ensure that the flow rates of the air flow passing through the central region and the peripheral region of the purification element tend to be consistent.

[0023] In this embodiment, the cooperation structure of the purification element and the vane group is further defined.

[0024] The minimum distance between a point on the first vane towards the purification element and a point on the purification element towards the first vane is greater than or equal to 20 mm and less than or equal to 70 mm.

[0025] The maximum distance between a point on the first vane towards the second vane and a point on the second vane towards the first vane is less than or equal to 100 mm.

[0026] Optionally, the minimum distance between a point on the first vane towards the purification element and a point on the purification element towards the first vane includes 30 mm, 40 mm, 50 mm, 60 mm, and the like, which are not listed one by one here.

[0027] Optionally, the maximum distance between a point on the first vane towards the second vane and a point on the second vane towards the first vane includes 90 mm, 80 mm, 70 mm, 60 mm, 50 mm, and the like, which are not listed one by one here.

[0028] This arrangement provides structural support for the air flow passing through the central region and the peripheral region of the purification element at the same time, and does not occupy too much space in the air duct, and can balance the air speed and the external dimensions of the fan.

[0029] In some embodiments, optionally, the rotational speed of the first vane is denoted as r1, and the rotational speed of the second vane is denoted as r2, wherein 0 < r1 / r2 < 1, that is, the rotational speed of the first vane is lower than the rotational speed of the second vane.

[0030] In this embodiment, the rotational speed relationship of the first and second vanes is further defined, preferably such that the rotational speed of the first vane is denoted as r1 and the rotational speed of the second vane is denoted as r2, wherein 0.5≤r1 / r2≤0.9. That is, the rotational speeds of the first and second vanes are different. Specifically, the ratio of the rotational speed of the first vane to the rotational speed of the second vane needs to satisfy 0.5-0.9 to achieve a better airflow flow-through state.

[0031] The outer size of the second vane is larger than that of the first vane, and the first vane is closer to the purification element than the second vane. Therefore, if the rotational speed of the first vane is greater than that of the second vane, the flow rate of the central region of the purification element will increase, the flow rate of the peripheral region of the purification element will decrease, and the peripheral region of the purification element cannot be fully utilized, which reduces the purification efficiency of the purification element.

[0032] The present application makes the wind speed of the first vane close to the purification element smaller than that of the second vane far from the purification element, which can take into account the airflow speed and flow rate at different positions of the purification element, so that the airflow can uniformly pass through the entire purification element, which can fully utilize the purification element and is beneficial to improve the purification effect of the purification element.

[0033] In some embodiments, the second vane is located on the peripheral side of the first vane.

[0034] In this embodiment, the cooperation structure of the first and second vanes is further defined.

[0035] The first and second vanes are coaxially arranged, and the second vane is located on the peripheral side of the first vane. This arrangement can ensure the effectiveness and feasibility of flow guiding, so that the airflow can flow through the central and peripheral regions of the purification element, and the airflow can uniformly pass through the entire purification element, which can fully utilize the purification element.

[0036] In some embodiments, the maximum distance between any two points on the outer edge of the purification element is denoted as d3, wherein -10mm≤d2-d3≤10mm.

[0037] In this embodiment, the cooperation structure of the purification element and the second vane is further defined.

[0038] wherein the maximum distance between any two points on the outer edge of the second vane is denoted as d2, the maximum distance between any two points on the outer edge of the purification element is denoted as d3, and -10mm≤d2-d3≤10mm. That is, the absolute value of the difference between d2 and d3 is less than or equal to 10mm.

[0039] The setting makes the size of the second fan blade close to the size of the purification element, so that when the second fan blade rotates, it can drive the airflow through the peripheral area of the purification element. It can ensure that the airflow is in effective contact with the peripheral area of the purification element, so as to fully utilize the peripheral area of the purification element and ensure the purification efficiency of the purification element.

[0040] In some embodiments, the maximum distance between any two points on the outer edge of the purification element is d3, 0

[0041] In this embodiment, the maximum distance between any two points on the outer edge of the first fan blade is d1, the maximum distance between any two points on the outer edge of the second fan blade is d2, and the maximum distance between any two points on the outer edge of the purification element is d3.

[0042] The setting makes the size of the second fan blade greater than the size of the purification element while the size of the first fan blade is smaller than the size of the purification element. Similarly, the size of the second fan blade is greater than the size of the first fan blade. Therefore, it can be effectively ensured that when the first fan blade rotates, more airflow flows through the non-peripheral part (referred to as the central area) of the purification element, and the first fan blade and the second fan blade cooperate with each other to make the flow rate and flow of the airflow flowing through the central area and the peripheral area of the purification element tend to be consistent, so that the airflow can pass through the entire purification element relatively uniformly. In this way, the purification element can be fully utilized, which is conducive to improving the filtering effect of the purification element and further improving the air outlet performance and purification rate of the fan.

[0043] In some embodiments, when the fan blade group and the purification element are coaxially arranged, the maximum distance between a point on the outer edge of the first fan blade and the axis is d1, the maximum distance between a point on the outer edge of the second fan blade and the axis is d2, and the maximum distance between a point on the outer edge of the purification element and the axis is d3.

[0044] In this embodiment, the size relationship between the fan blade group and the purification element is further limited, specifically, 0.2

[0045] Optionally, d2 / d3>1.5, which defines the cooperation relationship between the size of the second fan blade and the size of the purification element. The setting makes the size of the second fan blade greater than the size of the purification element, which provides more effective and reliable structural support for the second fan blade to drive the airflow through the peripheral area of the purification element when it rotates.

[0046] In some embodiments, optionally, the shell assembly comprises: a barrel, the purification element is arranged at the first end of the barrel, the inner surface of the barrel encloses the air duct, the barrel is provided with an overflow port, the overflow port is in communication with the air duct; a first cover body connected to the second end of the barrel, the first cover body is provided with an air outlet; the port of the first end of the barrel forms an air inlet, the air inlet is arranged around the purification element; the area of the region surrounded by the port wall of the overflow port is denoted as s1, the area of the outer peripheral wall of the barrel is denoted as s2, wherein s1 / s2>0.3.

[0047] In this embodiment, the structure of the shell assembly is defined.

[0048] The shell assembly comprises a barrel and a first cover body. The inner surface of the barrel encloses the air duct, the port of the first end of the barrel forms an air inlet, the air inlet is arranged around the purification element, that is, the airflow directly flows into the air duct through the purification element. The first cover body is connected to the second end of the barrel, and the first cover body is provided with an air outlet.

[0049] The barrel is provided with an overflow port, and the overflow port is in communication with the air duct.

[0050] In this way, when the fan is working, the airflow can flow into the air duct through the overflow port and the air inlet at the same time, which is beneficial to improve the air volume of the fan. It is beneficial to improve the air supply efficiency.

[0051] Further, the area of the region surrounded by the port wall of the overflow port is denoted as s1, and the area of the outer peripheral wall of the barrel is denoted as s2, wherein s1 / s2>0.3. By limiting the relationship between the area of the region surrounded by the port wall of the overflow port and the area of the outer peripheral wall of the barrel to satisfy the above formula, the air inlet volume of the fan can be improved, which is beneficial to improve the air supply efficiency of the fan. At the same time, this setting can also meet the use requirements of formaldehyde removal and volatile organic compound removal.

[0052] In some embodiments, optionally, the shell assembly comprises: a barrel, the purification element is arranged at the first end of the barrel, the inner surface of the barrel encloses the air duct, the barrel is provided with an overflow port, the overflow port is in communication with the air duct; a first cover body connected to the second end of the barrel, the first cover body is provided with an air outlet; a second cover body connected to the first end of the barrel, the second cover body is provided with an air inlet; the area of the region surrounded by the port wall of the overflow port is denoted as s1, the area of the outer peripheral wall of the barrel is denoted as s2, wherein s1 / s2>0.3.

[0053] In this embodiment, the structure of the shell assembly is defined.

[0054] The shell assembly comprises a barrel, a first cover body and a second cover body. The first cover body is connected to the second end of the barrel, and the second cover body is connected to the first end of the barrel. The first cover body is provided with an air outlet, and the second cover body is provided with an air inlet.

[0055] The cylinder is provided with an overflow port, and the overflow port is in communication with the air duct.

[0056] In this way, when the fan is working, the airflow can flow into the air duct through the overflow port and the air inlet at the same time, which is beneficial to improve the air volume of the fan and improve the air supply efficiency.

[0057] Further, the area of the region surrounded by the overflow port is denoted as s1, and the area of the outer peripheral wall of the cylinder is denoted as s2, wherein s1 / s2>0.3. By limiting the relationship between the area of the region surrounded by the overflow port and the area of the outer peripheral wall of the cylinder to satisfy the above formula, the air volume of the fan can be improved, which is beneficial to improve the air supply efficiency of the fan, and the setting can also meet the use requirements of formaldehyde removal and volatile organic compound removal.

[0058] In some embodiments, optionally, the overflow port is located on the side of the purification element away from the air inlet.

[0059] In this embodiment, the cooperation structure of the overflow port and the purification element is further limited, so that the overflow port is located on the side of the purification element away from the air inlet, that is, the airflow flowing into the air duct through the overflow port does not pass through the purification element, so that the air resistance can be reduced, the air volume and air speed of the fan can be ensured, and the air supply efficiency of the fan can be ensured.

[0060] In some embodiments, optionally, the fan further comprises a first catalytic layer, the first catalytic layer is arranged on the inner surface of the cylinder, and the first catalytic layer comprises active particles.

[0061] In this embodiment, the structure of the fan is further limited, so that the fan further comprises a first catalytic layer, and the first catalytic layer comprises active particles.

[0062] For example, when the active particles comprise transition metal ions, the transition metal ions exist in the form of ions or compounds. Similarly, the rare earth metal ions exist in the form of ions or compounds. The noble metal oxide ions exist in the form of ions or compounds.

[0063] In this embodiment, the active particles comprise any one or a combination of transition metal ions, rare earth metal ions and noble metal oxide ions. In this way, the first catalytic layer can decompose formaldehyde into CO2 (i.e., carbon dioxide) and H2O (i.e., water), so as to purify the air.

[0064] That is, after the airflow flows through the purification element, the purification element can adsorb the formaldehyde molecules in the air and decompose them. The purification element itself is not consumed, so that the catalytic oxidation reaction can be repeatedly performed to purify the air.

[0065] In some embodiments, optionally, the purifying member comprises: a mesh plate; and a second catalytic layer disposed on the mesh plate, the second catalytic layer comprising at least active particles, the active particles comprising any one or a combination of: transition metal ions, rare earth metal ions, and noble metal oxide ions.

[0066] In this embodiment, the structure of the purifying member is defined such that the purifying member comprises the mesh plate and the second catalytic layer. The second catalytic layer is disposed on the mesh plate, and the second catalytic layer comprises at least active particles.

[0067] For example, when the active particles comprise transition metal ions, the transition metal ions are in the form of ions or compounds. Similarly, the rare earth metal ions are in the form of ions or compounds. The noble metal oxide ions are in the form of ions or compounds.

[0068] In this way, the second catalytic layer can decompose formaldehyde into CO2 and H2O, achieving the purpose of purifying air.

[0069] In some embodiments, optionally, the first catalytic layer or the second catalytic layer comprises a support and active particles, the support comprising any one or a combination of: alumina, silica, titania, and zirconia.

[0070] That is, after the airflow flows through the purifying member, the purifying member can adsorb formaldehyde molecules in the air and decompose them. The purifying member itself is not consumed, so it can repeatedly perform catalytic oxidation reactions to purify the air.

[0071] In some embodiments, optionally, the mesh plate has a pore size greater than or equal to 0.5 mm and less than or equal to 2 mm, and the width t of the portion of the mesh plate between adjacent two mesh holes is greater than or equal to 0.02 mm and less than or equal to 0.1 mm.

[0072] In this embodiment, the structure of the mesh plate is further defined such that the mesh plate has a pore size greater than or equal to 0.5 mm and less than or equal to 2 mm, and the width t of the portion of the mesh plate between adjacent two mesh holes is greater than or equal to 0.02 mm and less than or equal to 0.1 mm. In this way, the attachment area of the second catalytic layer can be ensured, and the catalytic effect of the second catalytic layer can be ensured.

[0073] In addition, the pore size of the mesh plate and the spacing between adjacent two mesh holes are defined to ensure the flow rate of the airflow. That is, this arrangement takes into account the purification efficiency and air volume of the purifying member.

[0074] In some embodiments, optionally, the mesh hole has a second catalytic layer disposed on the mesh wall, the total coverage area of the second catalytic layer is denoted as s3, and the total area of the inner surface of the mesh hole of the mesh plate is denoted as s4, wherein s3 / s4≥0.8.

[0075] In this embodiment, the cooperating structure of the mesh plate and the second catalytic layer is defined such that the hole wall of the mesh hole is provided with the second catalytic layer, the total area of the coverage of the second catalytic layer is denoted as s3, and the total area of the inner surface of the mesh hole of the mesh plate is denoted as s4, wherein s3 / s4≥0.8. The coverage area of the second catalytic layer is ensured, and the purification efficiency of the purification member is ensured.

[0076] In some embodiments, the purification member is optionally located on the windward side of the fan blade group.

[0077] In this embodiment, the cooperating structure of the purification member and the fan blade group is further defined. The purification member is located on the windward side of the fan blade group. The airflow entering the air duct through the air inlet first passes through the purification member and then flows out of the air outlet of the fan, so as to purify the harmful substances (such as formaldehyde and volatile organic compounds, etc., which are not listed here) in the air by using the purification member. The fan not only has the function of air supply, but also has the function of purifying harmful substances in the air, so as to purify the air and enrich the use function of the fan.

[0078] Additional aspects and advantages of the present application will become apparent from the following description with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0079] The above and / or additional aspects and advantages of the present application will become apparent and be readily understood from the following description, taken in conjunction with the accompanying drawings, in which:

[0080] Figure 1 A partial structure schematic diagram of a first perspective view of a fan of a first embodiment of the present application is shown;

[0081] Figure 2 A partial structure schematic diagram of a second perspective view of the fan of the first embodiment of the present application is shown;

[0082] Figure 3 A partial structure schematic diagram of a third perspective view of the fan of the first embodiment of the present application is shown;

[0083] Figure 4 A structure schematic diagram of a first perspective view of a purification member, a first fan blade and a second fan blade of the first embodiment of the present application is shown;

[0084] Figure 5 A structure schematic diagram of a second perspective view of the purification member, the first fan blade and the second fan blade of the first embodiment of the present application is shown;

[0085] Figure 6 A partial structure schematic diagram of a fan of a second embodiment of the present application is shown.

[0086] Wherein, Figures 1 to 6 The correspondence between the reference signs in the drawings and the component names is as follows:

[0087] 10 fan, 100 housing assembly, 110 air inlet, 120 air outlet, 130 air duct, 140 cylinder, 142 first end, 144 second end, 146 flow port, 150 first cover, 160 second cover, 200 fan blade set, 210 first fan blade, 220 second fan blade, 300 purification piece, 310 mesh plate, 312 mesh hole, 320 second catalytic layer, 330 central region, 340 peripheral region, 350 first catalytic layer. DETAILED DESCRIPTION

[0088] In order to enable a more complete understanding of the above-mentioned objects, features and advantages of the present application, the present application will be described in further detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0089] In the following description, a large number of specific details are set forth in order to facilitate a thorough understanding of the present application, but the present application can also be implemented in other ways different from those described herein, and therefore the scope of protection of the present application is not limited by the specific embodiments disclosed below.

[0090] The following description refers to the accompanying drawings and specific embodiments. Figures 1 to 6 A fan 10 according to some embodiments of the present application.

[0091] As shown in Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 , a fan 10 according to some embodiments of the present application includes a housing assembly 100, a fan blade set 200 and a purification piece 300.

[0092] The housing assembly 100 is provided with an air inlet 110 and an air outlet 120.

[0093] The housing assembly 100 is provided with an air duct 130.

[0094] The air duct 130 communicates the air inlet 110 and the air outlet 120.

[0095] The fan blade set 200 is arranged in the air duct 130.

[0096] The fan blade set 200 is used to send air from the air inlet 110 to the air outlet 120.

[0097] The fan blade set 200 includes a first fan blade 210.

[0098] The purification piece 300 is arranged in the air duct 130.

[0099] The purification piece 300 is located on one side of the fan blade set 200.

[0100] The purifying member 300 is used at least for purifying formaldehyde and volatile organic compounds.

[0101] Along the axis perpendicular to the first fan blade 210, the minimum distance from the point on the outer edge of the first fan blade 210 to the wall surface of the air duct 130 is greater than the minimum distance from the point on the outer edge of the purifying member 300 to the inner wall surface of the air duct 130.

[0102] The fan 10 provided in the present application comprises a housing assembly 100, a fan blade group 200 and a purifying member 300.

[0103] The housing assembly 100 is provided with an air inlet 110 and an air outlet 120, and the housing assembly 100 is provided with an air duct 130, which is in communication with the air inlet 110 and also in communication with the air outlet 120. That is, the air duct 130 is in communication with the air inlet 110 and the air outlet 120.

[0104] The fan blade group 200 and the purifying member 300 are both arranged in the air duct 130, and the purifying member 300 is arranged on one side of the fan blade group 200, that is, the purifying member 300 is arranged opposite to the fan blade group 200, and the airflow flows through the purifying member 300 to purify the harmful substances (such as formaldehyde and volatile organic compounds, etc., which are not listed here) in the air by using the purifying member 300, so that the fan 10 not only has the function of air supply, but also has the function of purifying the harmful substances in the air, and can purify the air, enriching the use function of the fan 10.

[0105] Further, the fan blade group 200 comprises a first fan blade 210, and along the axis perpendicular to the first fan blade 210, the minimum distance from the point on the outer edge of the first fan blade 210 to the wall surface of the air duct 130 is greater than the minimum distance from the point on the outer edge of the purifying member 300 to the wall surface of the air duct 130. The cross sections of the first fan blade 210 and the purifying member 300 are taken along the axis perpendicular to the first fan blade 210, respectively, and in the cross sections, the area of the region enclosed by the contour line of the first fan blade 210 is smaller than the area of the region enclosed by the contour line of the purifying member 300. In other words, along the axis of the first fan blade 210, the orthographic projection of the first fan blade 210 on the purifying member 300 is located inside the outer edge of the purifying member 300.

[0106] Therefore, it can be known that the first fan blade 210 is arranged opposite to the central region 330 of the purifying member 300. The fan 10 can cause a local airflow low-pressure region when working, and increase the gas flow of the central region 330.

[0107] According to Bernoulli equation and continuity equation, the velocity and pressure of fluid in the flow process are inversely proportional, the rotation of the fan blade group 200 drives the air flow, which will change the density of the air. Based on the negative pressure effect, when the first fan blade 210 opposite to the central area 330 of the purification component 300 rotates, the surrounding air molecules will be impacted by the force, the mechanical energy of rotation is converted into the kinetic energy of the air, the local air molecules form a whole flow, the air density in the area decreases, and a relative low pressure area is formed. The high pressure area formed by the first fan blade 210 and one side of the purification component 300 will push the air flow to the low pressure area, forming a certain air flow in the local area, attracting the air behind the purification component 300 (i.e., “self-suction”), and the air flows through the purification component 300 to complete the purification.

[0108] Based on the above principle, that is, the first fan blade 210 opposite to the central area 330 of the purification component 300 rotates quickly, which can convert the mechanical energy of rotation into the kinetic energy of the air, and can solve the inevitable high wind resistance problem caused by the purification component 300, effectively avoiding the decrease of the blowing performance of the fan blade group 200 due to the increase of the purification component 300. It can solve the problem of uneven purification coverage of the filter device caused by the fluid characteristics of the fan blade in the related art, while ensuring the blowing performance of the fan 10, effectively improving the purification efficiency.

[0109] In some embodiments, as shown in Figure 1 、 Figure 2 、 Figure 4 and Figure 5 , the fan blade group 200 further includes a second fan blade 220, and the first fan blade 210 and the second fan blade 220 are coaxially arranged; the maximum distance between any two points on the outer edge of the first fan blade 210 is denoted as d1, and the maximum distance between any two points on the outer edge of the second fan blade 220 is denoted as d2, d1 < d2.

[0110] In this embodiment, the structure of the fan blade group 200 is further limited, specifically, the fan blade group 200 further includes a second fan blade 220. The first fan blade 210 and the second fan blade 220 are coaxially arranged. The maximum distance between any two points on the outer edge of the first fan blade 210 is denoted as d1, and the maximum distance between any two points on the outer edge of the second fan blade 220 is denoted as d2, d1 < d2. That is, the rotation radius of the first fan blade 210 is smaller than the rotation radius of the second fan blade 220. In other words, along the direction perpendicular to the axis of the first fan blade 210, the distance from the first fan blade 210 to the wall surface of the air duct 130 is greater than the distance from the second fan blade 220 to the wall surface of the air duct 130. Therefore, it can be known that the fan blade group 200 includes at least two fan blades of different specifications.

[0111] The first fan blade 210 and the second fan blade 220 are provided in different specifications, and along the direction perpendicular to the axial direction of the first fan blade 210, the minimum distance from the point on the outer edge of the first fan blade 210 to the wall surface of the air duct 130 is greater than the minimum distance from the point on the outer edge of the purification element 300 to the wall surface of the air duct 130. In this way, when the fan blade group 200 is working, the first fan blade 210 can drive the airflow to pass through the central region 330 of the purification element 300. Since the rotating radius of the second fan blade 220 is greater than that of the first fan blade 210, the second fan blade 220 can drive the airflow to pass through the peripheral region 340 of the purification element 300. That is, the first fan blade 210 and the second fan blade 220 cooperate with each other to enable the airflow to flow through the central region 330 and the peripheral region 340 of the purification element 300, so that the airflow can uniformly pass through the entire purification element 300, thereby fully utilizing the purification element 300, which is conducive to improving the filtering effect of the purification element 300 and the use performance and market competitiveness of the fan 10.

[0112] In some embodiments, the first fan blade 210 is located between the second fan blade 220 and the purification element 300.

[0113] In some embodiments, the first fan blade 210 is located between the second fan blade 220 and the purification element 300.

[0114] In this embodiment, the cooperation structure of the first fan blade 210, the second fan blade 220 and the purification element 300 is further limited.

[0115] The first fan blade 210 is located between the second fan blade 220 and the purification element 300, that is, along the axial direction of the first fan blade 210, the first fan blade 210 is located between the second fan blade 220 and the purification element 300. That is, the first fan blade 210 is closer to the purification element 300 than the second fan blade 220. This arrangement can ensure that the effective airflow is guided to flow through the central region 330 and the peripheral region 340 of the purification element 300.

[0116] If the second fan blade 220 is located between the first fan blade 210 and the purification element 300, most of the airflow is guided to the peripheral region 340 of the purification element 300, and only a small part of the airflow flows through the central region 330 of the purification element 300, which can reduce the purification efficiency of the purification element 300.

[0117] In some embodiments, optionally, the minimum distance from a point on the first fan blade 210 towards a point on the purification element 300 to a point on the purification element 300 towards the first fan blade 210 is greater than or equal to 20mm and less than or equal to 70mm, and the maximum distance from a point on the first fan blade 210 towards a point on the second fan blade 220 to a point on the second fan blade 220 towards the first fan blade 210 is less than or equal to 100mm.

[0118] In this embodiment, the cooperation structure of the purification element 300 and the fan blade group 200 is further defined.

[0119] The minimum distance from a point on the first fan blade 210 towards a point on the purification element 300 to a point on the purification element 300 towards the first fan blade 210 is greater than or equal to 20mm and less than 70mm.

[0120] The maximum distance from a point on the first fan blade 210 towards a point on the second fan blade 220 to a point on the second fan blade 220 towards the first fan blade 210 is less than or equal to 100mm.

[0121] Optionally, the minimum distance from a point on the first fan blade 210 towards a point on the purification element 300 to a point on the purification element 300 towards the first fan blade 210 includes 30mm, 40mm, 50mm, 60mm, and so on, which are not listed one by one here.

[0122] Optionally, the maximum distance from a point on the first fan blade 210 towards a point on the second fan blade 220 to a point on the second fan blade 220 towards the first fan blade 210 includes 90mm, 80mm, 70mm, 60mm, 50mm, and so on, which are not listed one by one here.

[0123] This arrangement provides structural support for the air flow to pass through the central region 330 and the peripheral region 340 of the purification element 300 at the same time, and does not occupy too much space in the air duct 130, and can balance the air speed and the external dimensions of the fan 10.

[0124] In some embodiments, optionally, the rotation speed of the first fan blade 210 is denoted as r1, and the rotation speed of the second fan blade 220 is denoted as r2, wherein 0

[0125] In this embodiment, the rotational speed relationship of the first fan blade 210 and the second fan blade 220 is further defined, such that the rotational speed of the first fan blade 210 is denoted as r1, and the rotational speed of the second fan blade 220 is denoted as r2, wherein 0 < r1 / r2 < 1, preferably 0.5 ≤ r1 / r2 ≤ 0.9. That is, the rotational speeds of the first fan blade 210 and the second fan blade 220 are different. Specifically, the rotational speed of the first fan blade 210 is lower than that of the second fan blade 220.

[0126] The outer size of the second fan blade 220 is larger than that of the first fan blade 210, and the first fan blade 210 is closer to the purification element 300 than the second fan blade 220. Therefore, if the rotational speed of the first fan blade 210 is greater than that of the second fan blade 220, the flow rate of the central region 330 of the purification element 300 will increase, the flow rate of the peripheral region 340 of the purification element 300 will decrease, and part of the peripheral region 340 of the purification element 300 cannot be fully utilized, which reduces the purification efficiency of the purification element 300.

[0127] The present application makes the wind speed of the first fan blade 210 close to the purification element 300 smaller than that of the second fan blade 220 far from the purification element 300, which can take into account the flow rate and flow rate of the air flow at different positions of the purification element 300, so that the air flow can uniformly pass through the entire purification element 300, which can fully utilize the purification element 300 and improve the purification effect of the purification element 300.

[0128] In some embodiments, the second fan blade 220 is located on the circumferential side of the first fan blade 210.

[0129] In this embodiment, the cooperation structure of the first fan blade 210 and the second fan blade 220 is further defined.

[0130] The first fan blade 210 and the second fan blade 220 are coaxially arranged, and the second fan blade 220 is located on the circumferential side of the first fan blade 210. This arrangement can ensure the effectiveness and feasibility of flow guiding, so that the air flow can flow through the central region 330 and the peripheral region 340 of the purification element 300, and the air flow can uniformly pass through the entire purification element 300, which can fully utilize the purification element 300.

[0131] Optionally, the first fan blade 210 is arranged opposite to the central region 330 of the purification element 300. And along the axial direction perpendicular to the first fan blade 210, the minimum distance from a point on the outer edge of the first fan blade 210 to the wall surface of the air duct 130 is greater than the minimum distance from a point on the outer edge of the purification element 300 to the wall surface of the air duct 130. In this way, the rotation of the first fan blade 210 can drive the air flow to flow through the central region 330 of the purification element 300, which can effectively utilize the central region 330 of the purification element 300.

[0132] In some embodiments, optionally, asFigure 4 As shown, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, where -10mm≤d2-d3≤10mm.

[0133] In this embodiment, the cooperation structure of the purifying member 300 and the second fan blade 220 is further defined.

[0134] As shown, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, where -10mm≤d2-d3≤10mm.

[0135] This arrangement makes the outer dimension of the second fan blade 220 close to the outer dimension of the purifying member 300, so that the second fan blade 220 can drive the airflow through the peripheral region 340 of the purifying member 300 when rotating. The airflow can be ensured to effectively contact the peripheral region 340 of the purifying member 300, so as to fully utilize the peripheral region 340 of the purifying member 300 and ensure the purification efficiency of the purifying member 300.

[0136] In some embodiments, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, 0

[0137] In this embodiment, the maximum distance between any two points on the outer edge of the first fan blade 210 is denoted as d1, the maximum distance between any two points on the outer edge of the second fan blade 220 is denoted as d2, and the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3.

[0138] As shown, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, where -10mm≤d2-d3≤10mm.

[0139] As shown, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, where -10mm≤d2-d3≤10mm.

[0140] In some embodiments, the maximum distance between any two points on the outer edge of the purifying member 300 is denoted as d3, 0 Figure 3As shown, the shell assembly 100 comprises: a cylinder body 140, a purification element 300 arranged at a first end 142 of the cylinder body 140, an inner surface of the cylinder body 140 enclosing an air duct 130, the cylinder body 140 being provided with an overflow port 146, the overflow port 146 being in communication with the air duct 130; a first cover body 150 connected to a second end 144 of the cylinder body 140, the first cover body 150 being provided with an air outlet 120; a port of the first end 142 of the cylinder body 140 forming an air inlet 110, the air inlet 110 being arranged around the purification element 300; an area of a region surrounded by a port wall of the overflow port 146 being denoted as s1, an area of an outer peripheral wall of the cylinder body 140 being denoted as s2, wherein s1 / s2>0.3.

[0141] In this embodiment, the structure of the shell assembly 100 is defined.

[0142] The shell assembly 100 comprises the cylinder body 140 and the first cover body 150. The inner surface of the cylinder body 140 encloses the air duct 130, the port of the first end 142 of the cylinder body 140 forming the air inlet 110, the air inlet 110 being arranged around the purification element 300, that is, the air flow directly passes through the purification element 300 and flows into the air duct 130. The first cover body 150 is connected to the second end 144 of the cylinder body 140, and the first cover body 150 is provided with the air outlet 120.

[0143] The cylinder body 140 is provided with the overflow port 146, and the overflow port 146 is in communication with the air duct 130.

[0144] In this way, when the fan 10 is working, the air flow can flow into the air duct 130 through the overflow port 146 and the air inlet 110 at the same time, which is beneficial to improve the air volume of the fan 10. It is beneficial to improve the air supply efficiency.

[0145] Further, an area of a region surrounded by a port wall of the overflow port 146 is denoted as s1, and an area of an outer peripheral wall of the cylinder body 140 is denoted as s2, wherein s1 / s2>0.3. By limiting the relationship between the area of the region surrounded by the port wall of the overflow port 146 and the area of the outer peripheral wall of the cylinder body 140 to satisfy the above formula, the air volume of the fan 10 can be improved, which is beneficial to improve the air supply efficiency of the fan 10. At the same time, this setting can also meet the use requirements of formaldehyde removal and volatile organic compound removal.

[0146] In some embodiments, optionally, as Figure 6As shown, the shell assembly 100 comprises: a barrel 140, a purification element 300 arranged at a first end 142 of the barrel 140, an inner surface of the barrel 140 enclosing an air duct 130, the barrel 140 being provided with an overflow port 146, the overflow port 146 being in communication with the air duct 130; a first cover 150 connected to a second end 144 of the barrel 140, the first cover 150 being provided with an air outlet 120; a second cover 160 connected to the first end 142 of the barrel 140, the second cover 160 being provided with an air inlet 110; an area surrounded by a wall of the overflow port 146 is denoted as s1, and an area of an outer peripheral wall of the barrel 140 is denoted as s2, wherein s1 / s2>0.3.

[0147] In this embodiment, the structure of the shell assembly 100 is defined.

[0148] The shell assembly 100 comprises the barrel 140, the first cover 150, and the second cover 160. The first cover 150 is connected to the second end 144 of the barrel 140, and the second cover 160 is connected to the first end 142 of the barrel 140. The first cover 150 is provided with the air outlet 120, and the second cover 160 is provided with the air inlet 110.

[0149] The barrel 140 is provided with the overflow port 146, and the overflow port 146 is in communication with the air duct 130.

[0150] In this way, when the fan 10 is in operation, the airflow can flow into the air duct 130 through the overflow port 146 and the air inlet 110 at the same time, which is conducive to improving the air volume of the fan 10. This is conducive to improving the air supply efficiency.

[0151] Further, an area surrounded by a wall of the overflow port 146 is denoted as s1, and an area of an outer peripheral wall of the barrel 140 is denoted as s2, wherein s1 / s2>0.3. By defining the relationship between the area surrounded by the wall of the overflow port 146 and the area of the outer peripheral wall of the barrel 140 to satisfy the above formula, the air intake of the fan 10 can be improved, which is conducive to improving the air supply efficiency of the fan 10. At the same time, this arrangement can also meet the use requirements of formaldehyde removal and volatile organic compound removal.

[0152] In some embodiments, the overflow port 146 is located on a side of the purification element 300 away from the air inlet 110.

[0153] In this embodiment, the cooperation structure of the overflow port 146 and the purification element 300 is further defined, so that the overflow port 146 is located on a side of the purification element 300 away from the air inlet 110, that is, the airflow flowing into the air duct 130 through the overflow port 146 does not pass through the purification element 300. In this way, the air resistance can be reduced, the air volume and air speed of the fan 10 can be ensured, and the air supply efficiency of the fan 10 can be ensured.

[0154] In some embodiments, optionally, such as Figure 6 As shown, the fan 10 further includes: a first catalyst layer 350, which is disposed on the inner surface of the cylinder 140. The first catalyst layer 350 includes a support portion and active particles; the support portion includes any one or a combination of the following: alumina, silicon oxide, titanium oxide and zirconium oxide; the active particles include any one or a combination of the following: transition metal ions, rare earth metal ions and noble metal oxide ions.

[0155] In this embodiment, the structure of the fan 10 is further defined such that the fan 10 also includes a first catalyst layer 350, which includes a support portion and active particles. The first catalyst layer 350 is disposed on the inner surface of the cylinder 140, specifically, the first catalyst layer 350 is coated on the inner surface of the cylinder 140.

[0156] The load includes any one or a combination of the following: alumina, silicon dioxide, titanium dioxide, and zirconium oxide; the active particles include any one or a combination of the following: transition metal ions, rare earth metal ions, and noble metal oxide ions. Thus, the first catalyst layer 350 can decompose formaldehyde into CO2 and H2O, achieving the purpose of air purification.

[0157] In other words, after the airflow passes through the purification component 300, the purification component 300 can adsorb formaldehyde molecules in the air and decompose them. The purification component 300 itself is not damaged. Therefore, it can repeatedly carry out catalytic oxidation reactions to purify the air.

[0158] In some embodiments, optionally, such as Figure 4 As shown, the purification component 300 includes: a mesh plate 310; a second catalyst layer 320 disposed on the mesh plate 310, the second catalyst layer 320 including a support portion and active particles; the support portion includes any one or a combination of the following: alumina, silicon oxide, titanium oxide and zirconium oxide; the active particles include any one or a combination of the following: transition metal ions, rare earth metal ions and noble metal oxide ions.

[0159] In this embodiment, the structure of the purification element 300 is defined such that the purification element 300 includes a mesh plate 310 and a second catalyst layer 320. The second catalyst layer 320 is disposed on the mesh plate 310 and includes a support portion and active particles.

[0160] The load layer comprises any one or a combination of the following: alumina, silicon dioxide, titanium dioxide, and zirconium oxide; the active particles comprise any one or a combination of the following: transition metal ions, rare earth metal ions, and noble metal oxide ions. Thus, the second catalyst layer 320 can decompose formaldehyde into CO2 and H2O, achieving the purpose of air purification.

[0161] That is, the air flow passes through the purification component 300, the purification component 300 can adsorb the formaldehyde molecules in the air, decompose them, and the purification component 300 itself is not consumed, so that the catalytic oxidation reaction can be repeatedly performed, and the air can be purified.

[0162] In some embodiments, optionally, as shown in FIG. 3, the diameter of the mesh plate 310 is greater than or equal to 0.5 mm and less than or equal to 2 mm, and the width t of the part of the mesh plate 310 between the adjacent two mesh holes 312 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm. Figure 1 In this embodiment, the structure of the mesh plate 310 is further limited, so that the diameter of the mesh plate 310 is greater than or equal to 0.5 mm and less than or equal to 2 mm, and the width t of the part of the mesh plate 310 between the adjacent two mesh holes 312 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm. In this way, the adhesion area of the second catalytic layer 320 can be ensured, and the catalytic effect of the second catalytic layer 320 can be ensured.

[0163] In addition, the diameter of the mesh plate 310 and the spacing between the adjacent two mesh holes 312 are limited to ensure the flow rate of the air flow. That is, the setting takes into account the purification efficiency and the air volume of the purification component 300.

[0164] In some embodiments, optionally, as shown in FIG. 3, the hole wall of the mesh hole 312 is provided with the second catalytic layer 320, the total coverage area of the second catalytic layer 320 is denoted as s3, and the total area of the inner surface of the mesh hole 312 of the mesh plate 310 is denoted as s4, wherein s3 / s4≥0.8.

[0165] Figure 4 In this embodiment, the cooperating structure of the mesh plate 310 and the second catalytic layer 320 is limited, so that the hole wall of the mesh hole 312 is provided with the second catalytic layer 320, the total coverage area of the second catalytic layer 320 is denoted as s3, and the total area of the inner surface of the mesh hole 312 of the mesh plate 310 is denoted as s4, wherein s3 / s4≥0.8. In this way, the coverage area of the second catalytic layer 320 can be ensured, and the purification efficiency of the purification component 300 can be ensured.

[0166] In some embodiments, optionally, the purification component 300 is located on the windward side of the fan blade group 200.

[0167] In some embodiments, optionally, the purification component 300 is located on the windward side of the fan blade group 200.

[0168] ​In this embodiment, the cooperation structure of the purifying member 300 and the fan blade group 200 is further defined. The purifying member 300 is located at the windward side of the fan blade group 200. The air flow entering the air duct 130 through the air inlet 110 first passes through the purifying member 300, and then flows out of the air outlet 120 of the fan 10, so as to purify the harmful substances (such as formaldehyde and volatile organic compounds, etc., which are not listed one by one here) in the air by the purifying member 300. The fan 10 not only has the function of air supply, but also has the function of purifying harmful substances in the air, so as to purify the air and enrich the use function of the fan 10.

[0169] Optionally, the fan blade group 200 includes a plurality of fan blades coaxially arranged. The plurality of fan blades are classified into different types, so that the plurality of fan blades include first fan blades 210 and second fan blades 220. Among the plurality of fan blades, the fan blade with the smallest radius of rotation is the first fan blade 210, and the fan blade with the largest radius of rotation is the second fan blade 220. The maximum distance between any two points on the outer edge is half of the radius of rotation.

[0170] Optionally, the number of the first fan blades 210 is at least one, and the number of the second fan blades 220 is at least one.

[0171] Optionally, the plurality of fan blades further include at least one third fan blade, and the radius of rotation of the third fan blade is between the radius of rotation of the first fan blade 210 and the radius of rotation of the second fan blade 220.

[0172] Optionally, r1 / r2=0.1, r1 / r2=0.2, r1 / r2=0.3, r1 / r2=0.4, r1 / r2=0.5, r1 / r2=0.6, r1 / r2=0.7, and r1 / r2=0.8, etc., which are not listed one by one here.

[0173] Optionally, the difference between d2 and d3 includes -10mm, -9mm, -8mm, -7mm, -6mm, -5mm, -4mm, -3mm, -2mm, -1mm, 0mm, 1mm, 2mm, 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, and 9mm, etc., which are not listed one by one here.

[0174] Optionally, the purifying member 300 is cross-sectioned along the axis perpendicular to the first fan blade 210. In the cross-section, the area surrounded by the contour line of the purifying member 300 is denoted as sk, and -78mm 2 ≤π×(0.5×d2)×(0.5×d2)-sk≤78mm 2 .

[0175] Optionally, d1 / d3=0.3, d1 / d3=0.4, d1 / d3=0.5, and d1 / d3=0.6, etc., which are not listed one by one here.

[0176] Optionally, d2 / d3 = 1.6, d2 / d3 = 1.7, d2 / d3 = 1.8, d2 / d3 = 1.9, and the like, are not listed one by one here.

[0177] Optionally, s1 / s2 = 0.32, s1 / s2 = 0.35, s1 / s2 = 0.38, s1 / s2 = 0.4, s1 / s2 = 0.45, and the like, are not listed one by one here.

[0178] In some embodiments, optionally, as shown in Figure 2 and Figure 3 The overflow port 146 is located on the side of the purification piece 300 away from the air inlet 110.

[0179] In this embodiment, the cooperation structure of the overflow port 146 and the purification piece 300 is further limited, so that the overflow port 146 is located on the side of the purification piece 300 away from the air inlet 110, that is, the air flow flowing into the air duct 130 through the overflow port 146 will not pass through the purification piece 300, so that the air resistance can be reduced, the air volume and air speed of the fan 10 can be ensured, and the air supply efficiency of the fan 10 can be ensured.

[0180] Optionally, the transition metal ions include any one or a combination of the following: Mn ions, Co ions, and Ni ions.

[0181] Optionally, the rare earth metal ions include Ce ions and / or La ions.

[0182] Optionally, the noble metal oxide ions include Pt ions and / or Pd ions.

[0183] Optionally, the pore size of the mesh plate 310 includes 0.6 mm, 0.7 mm, 0.8 mm, 1 mm, 1.2 mm, 1.4 mm, 1.6 mm, and 1.8 mm, and the like, are not listed one by one here.

[0184] Optionally, the spacing between the adjacent two mesh holes 312 of the mesh plate 310 includes 0.04 mm, 0.06 mm, and 0.08 mm, and the like, are not listed one by one here.

[0185] Optionally, s3 / s4 = 0.82, s3 / s4 = 0.85, s3 / s4 = 0.88, and s3 / s4 = 0.9, and the like, are not listed one by one here.

[0186] Optionally, the mesh plate 310 includes any one or a combination of the following: aluminum honeycomb plate, honeycomb ceramic plate, corrugated polypropylene plate, and corrugated glass fiber plate.

[0187] The fan 10 of the present application has a purification function. The fan 10 can also purify formaldehyde under normal blowing conditions, and the fan 10 can maintain stable purification under long-term operation.

[0188] The size and position of the fan blades are required to ensure that the air flow is evenly through the purification element 300, and to obtain higher formaldehyde removal performance. The fan blade group 200 includes a plurality of fan blades, which include a first fan blade 210 and a second fan blade 220. The area of the first fan blade 210 is smaller than the area of the purification element 300, and can drive the air flow through the central region of the purification element 300. The area of the second fan blade 220 is comparable to the area of the purification element 300, and can drive the air flow through the peripheral region 340 of the purification element 300, so that the air flow is evenly through the entire purification element 300, and each mesh 312 of the purification element 300 plays a purification role.

[0189] The fan 10 includes a housing assembly 100, a fan blade group 200, and a purification element 300. The housing assembly 100 is provided with an air duct 130. The fan blade group 200 and the purification element 300 are both in the air duct 130, and the pollutant medium passes through the air duct 130 and is purified by the purification element 300 to complete the purification.

[0190] The fan 10 of the present application can also purify formaldehyde under normal blowing conditions, and can maintain stable purification under long-term operation.

[0191] At least one of the first fan blade 210 and the second fan blade 220 is a blade-type rotatable component. The fan 10 includes a motor connected to the fan blade group 200, and the motor drives the first fan blade 210 and the second fan blade 220 to rotate.

[0192] The first fan blade 210 includes at least three blades, and / or the second fan blade 220 includes at least three blades.

[0193] The purification element 300 is located on the windward side of the fan blade group 200. The purification element 300 and the fan blade group 200 are arranged perpendicular to the axial direction of the fan blade group 200. The purification element 300 is placed in parallel with the fan blade group 200. The purification element 300 is located at the front end of the air flow, and the fan blade group 200 is located at the rear end of the air flow, i.e., the air first passes through the purification element 300 and then passes through the fan blade group 200.

[0194] The maximum distance between any two points on the outer edge of the second fan blade 220 is denoted as d2, and the maximum distance between any two points on the outer edge of the purification element 300 is denoted as d3, wherein -10mm≤d2-d3≤10mm.

[0195] The maximum distance between any two points on the outer edge of the first fan blade 210 is denoted as d1, wherein 0.2

[0196] The distance from the purification element 300 to the first fan blade 210 is greater than or equal to 20mm and less than or equal to 70mm. The distance from the first fan blade 210 to the second fan blade 220 is less than 100mm.

[0197] The rotation speed r1 of the first fan blade 210 is lower than the rotation speed r2 of the second fan blade 220, and 0.5≤r1 / r2≤0.9.

[0198] In order not to affect the air outlet wind speed, the air duct 130 where the fan blade group 200 and the purification component 300 are located is non-closed, the side of the air duct 130 has a flow port 146, the airflow can enter from the first end 142 and the flow port 146 of the air duct 130 at the same time, and then flow out from the second end 144 of the air duct 130 after converging. The area surrounded by the port wall of the flow port 146 is denoted as s1, and the area of the side of the air duct 130 is denoted as s2, and s1 / s2>0.3.

[0199] The flow port 146 of the air duct 130 is arranged at the leeward side of the purification component 300, and only the airflow flowing into the first end 142 of the air duct 130 passes through the purification component 300.

[0200] The air inlet wind speed of the first end 142 of the air duct 130 is denoted as F1, and the air inlet wind speed of the flow port 146 is denoted as F2, and F1>F2. When the overall air outlet wind speed is greater than 4 m / s, in order to ensure high formaldehyde removal performance, F1 / F2>1.5.

[0201] The purification component 300 is a catalytic degradation module, and the purification component 300 comprises a breathable substrate (i.e., a mesh plate 310) and a second catalytic layer 320 thereon, and the second catalytic layer 320 has a purification effect on formaldehyde in the airflow.

[0202] The mesh plate 310 has a pore size greater than or equal to 0.5 mm and less than or equal to 2 mm, and the distance between adjacent two mesh holes 312 of the mesh plate 310 is greater than or equal to 0.02 mm and less than or equal to 0.1 mm.

[0203] The mesh holes 312 of the mesh plate 310 are loaded with the second catalytic layer 320, the second catalytic layer 320 uniformly covers the inner surfaces of the mesh holes 312, the total area of the second catalytic layer 320 is denoted as s3, and the total area of the inner surfaces of the mesh holes 312 of the mesh plate 310 is denoted as s4, wherein s3 / s4≥0.8.

[0204] The fan 10 of the present application can purify formaldehyde under normal blowing conditions, and can maintain stable purification under long-term operation.

[0205] The fan 10 comprises a housing assembly 100, a fan blade group 200, and a purification component 300, the housing assembly 100 is provided with an air inlet 110 and an air outlet 120, and the housing assembly 100 is provided with an air duct 130. Pollutant media pass through the air duct 130 and are treated by the purification component 300 to complete the purification effect.

[0206] The purification component 300 is located at the front end of the airflow, and the fan blade group 200 is located at the rear end of the airflow.

[0207] The air-permeable base includes any one or a combination of the following: an aluminum honeycomb base, a honeycomb ceramic base, a corrugated polypropylene base, and a corrugated glass fiber base.

[0208] The purifying member 300 can be a whole piece of mesh or a ring-shaped mesh with a hollowed middle part.

[0209] The second catalytic layer 320 includes a catalyst and a binding material, the catalyst is a micro-nano particle, and is scattered in the network structure formed by the binding material, and the second catalytic layer 320 has a porous form.

[0210] The catalyst includes active particles and a support part, and the support part includes any one or a combination of the following: aluminum oxide, silicon oxide, titanium oxide, and zirconium oxide.

[0211] The active particles include any one or a combination of the following: transition metal ions, rare earth metal ions, and noble metal oxide ions.

[0212] The transition metal ions include any one or a combination of the following: Mn, Co, and Ni.

[0213] The rare earth metal ions include Ce and / or La.

[0214] The noble metal oxide ions include Pt and / or Pd.

[0215] The second catalytic layer 320 can decompose formaldehyde into CO2 and H2O to achieve the purpose of purifying air.

[0216] The fan blade group 200 and the purifying member 300 are both arranged in the air duct 130, and the purifying member 300 is located on the windward side of the fan blade group 200, that is, the purifying member 300 is arranged opposite to the windward side of the fan blade group 200, and the airflow flows through the purifying member 300 and then flows to the fan blade group 200. The fan blade group 200 works to send air from the air inlet 110 to the air outlet 120.

[0217] Since the purifying member 300 is located on the windward side of the fan blade group 200, the airflow entering the air duct 130 through the air inlet 110 first passes through the purifying member 300 and then flows out of the fan 10 through the air outlet 120, so as to purify harmful substances in the air by using the purifying member 300. Therefore, the fan 10 not only has the function of sending air, but also has the function of purifying harmful substances in the air, can purify air, and enriches the use function of the fan 10.

[0218] It can be understood that the fan blade group 200 comprises the first fan blade 210 and the second fan blade 220, and the first fan blade 210 and the second fan blade 220 are coaxially arranged. The maximum distance between any two points on the outer edge of the first fan blade 210 is denoted as d1, and the maximum distance between any two points on the outer edge of the second fan blade 220 is denoted as d2, d1 < d2. That is, the rotation radius of the first fan blade 210 is smaller than the rotation radius of the second fan blade 220. In other words, along the axial direction perpendicular to the first fan blade 210, the distance from the first fan blade 210 to the wall surface of the air duct 130 is greater than the distance from the second fan blade 220 to the wall surface of the air duct 130. Therefore, it can be known that the fan blade group 200 comprises at least two fan blades of different specifications.

[0219] Further, the cooperation structure of the first fan blade 210 and the purification element 300 is limited, so that the purification element 300 is located on the windward side of the first fan blade 210. And along the axial direction perpendicular to the first fan blade 210, the distance from the first fan blade 210 to the wall surface of the air duct 130 is greater than the distance from the purification element 300 to the wall surface of the air duct 130, that is, the cross section of the first fan blade 210 and the purification element 300 is respectively taken along the axial direction perpendicular to the first fan blade 210, and in the cross section, the area of the region surrounded by the contour line of the first fan blade 210 is smaller than the area of the region surrounded by the contour line of the purification element 300. It can also be said that along the axial direction of the first fan blade 210, the orthographic projection of the first fan blade 210 on the purification element 300 is located inside the outer edge of the purification element 300.

[0220] The present application provides the first fan blade 210 and the second fan blade 220 of different specifications, and along the axial direction perpendicular to the first fan blade 210, the distance from the first fan blade 210 to the wall surface of the air duct 130 is greater than the distance from the purification element 300 to the wall surface of the air duct 130. In this way, when the fan blade group 200 works, the first fan blade 210 can drive the airflow to pass through the central region 330 of the purification element 300. Since the rotation radius of the second fan blade 220 is greater than the rotation radius of the first fan blade 210, the second fan blade 220 can drive the airflow to pass through the peripheral region 340 of the purification element 300. That is, the first fan blade 210 and the second fan blade 220 cooperate with each other to enable the airflow to flow through the central region 330 and the peripheral region 340 of the purification element 300, so that the airflow can uniformly pass through the entire purification element 300, thereby fully utilizing the purification element 300, which is conducive to improving the filtering effect of the purification element 300 and the use performance and market competitiveness of the fan 10.

[0221] In the present application, the term "a plurality" means two or more, unless expressly specified otherwise. The terms "mounting", "connected", "connecting", "fixed", and the like should be understood broadly, for example, "connected" can be fixed connection, or detachable connection, or integrally connected; "connected" can be directly connected, or indirectly connected through intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0222] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "a specific embodiment", and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. The above is only the preferred embodiment of the present application, and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A fan, characterized by, The application relates to a shell assembly, a fan blade group, a purification element and a first catalytic layer. The shell assembly is provided with an air inlet and an air outlet, and is internally provided with an air duct which is communicated with the air inlet and the air outlet. The fan blade group is arranged in the air duct and is used for sending air from the air inlet to the air outlet. The purification element is arranged in the air duct and is located on one side of the fan blade group. The purification element is used for purifying formaldehyde and volatile organic compounds.

2. The fan of claim 1, wherein, The minimum distance between a point on the outer edge of the first fan blade and the inner wall surface of the air duct is greater than the minimum distance between a point on the outer edge of the purification element and the inner wall surface of the air duct. The fan blade group further comprises a second fan blade, and the first fan blade and the second fan blade are coaxially arranged.

3. The fan of claim 2, wherein, The maximum distance between any two points on the outer edge of the first fan blade is d1, and the maximum distance between any two points on the outer edge of the second fan blade is d2, and d1 < d2.

4. The fan of claim 3, wherein, The first fan blade is located between the second fan blade and the purification element.

5. The fan of any one of claims 2 to 4, wherein, The rotating speed of the first fan blade is r1, and the rotating speed of the second fan blade is r2, wherein 0 < r1 / r2 < 1.

6. The fan of any one of claims 1 to 4, wherein, The minimum distance between a point on the side of the first fan blade facing the purification element and a point on the side of the purification element facing the first fan blade is less than or equal to the minimum distance between a point on the side of the second fan blade facing the purification element and a point on the side of the purification element facing the second fan blade.

7. The fan of any one of claims 1 to 4, wherein, The maximum distance between any two points on the outer edge of the purification element is d3, and -10 mm <= d2-d3 <= 10 mm.

8. The fan of claim 1, wherein, The maximum distance between any two points on the outer edge of the purification element is d3, 0 < d1 / d3 < 1, and d2 / d3 > 1. The shell assembly comprises: a cylinder body, the purification element is arranged at the first end of the cylinder body, the inner surface of the cylinder body encloses the air duct, and the cylinder body is provided with a flow port which is communicated with the air duct; a first cover body connected to the second end of the cylinder body, and the first cover body is provided with an air outlet; 9. The fan of claim 8, wherein, the port of the first end of the cylinder body forms the air inlet, and the air inlet is arranged around the purification element. The shell assembly further comprises: a second cover body connected to the first end of the cylinder body, and the second cover body is provided with the air inlet; and / or 10. The fan of claim 8 or 9, wherein, the area of the region surrounded by the port wall of the flow port is s1, and the area of the outer peripheral wall of the cylinder body is s2, wherein s1 / s2 > 0.

3.

11. The fan of claim 8 or 9, wherein, The flow port is located on the side of the purification element away from the air inlet. Further comprising: a first catalytic layer arranged on the inner surface of the cylinder body, and the first catalytic layer comprises active particles.

12. The fan of any one of claims 1 to 4, wherein, The active particles comprise any one or a combination of transition metal ions, rare earth metal ions and noble metal oxide ions. The purification element comprises: a mesh plate; a second catalytic layer arranged on the mesh plate, and the second catalytic layer comprises active particles. The active particles comprise any one or a combination of transition metal ions, rare earth metal ions and noble metal oxide ions.

13. The fan of claim 12, wherein, The mesh plate has a pore size greater than or equal to 0.5 mm and less than or equal to 2 mm. The mesh plate has a width t greater than or equal to 0.02 mm and less than or equal to 0.1 mm between adjacent two mesh holes.

14. The fan of claim 13, wherein, The mesh hole has a hole wall provided with the second catalytic layer, and a total area of the second catalytic layer is denoted as s3, and a total area of an inner surface of the mesh hole of the mesh plate is denoted as s4, wherein s3 / s4≥0.

8.

15. The fan of any one of claims 1 to 4, wherein, The purification member is located on a windward side of the group of fan blades.

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