Air purifier with side air outlet structure and air purifier using same

Abstract

This invention discloses a side-exhaust structure and an air purifier using the same, belonging to the field of air purification equipment. It includes a housing, an exhaust grille, a fan, and a guide shroud. The exhaust grille is located at the top of the housing, and the fan is disposed within the housing, below the exhaust grille. The guide shroud surrounds the fan, guiding the airflow generated by the fan towards the exhaust grille. The exhaust grille includes multiple guide blades arranged on the circumference of the top of the housing. The guide blades are radially distributed along the fan and have a streamlined cross-section, allowing air output from the fan to be discharged circumferentially, reducing the load on the fan and improving exhaust efficiency. The streamlined blades also reduce aerodynamic noise.

Description

Technical Field

[0001] The present invention relates to the technical field of air purification, and particularly to a side air outlet structure and an air purifier using the same. Background Art

[0002] As consumers pay more and more attention to the environment, an air purifier, which is a highly intelligent device placed indoors that can purify air and improve air quality, naturally wins the favor of consumers. At the same time, air purifiers that meet different needs and application scenarios of consumers have emerged. In any case, the purification ability (Clean Air Delivery Rate, CADR) of an air purifier and the operating noise have always been important parameters for consumers to measure the performance of the purifier, which means that a truly effective air purifier not only needs to have strong purification efficiency and ability, but also the lower the noise, the better.

[0003] A patent application with the publication number CN111195470A discloses an air purifier, including a housing, an air inlet part is provided at the lower side of the housing, and an air outlet part is provided at the upper side of the housing; and an air duct, the air duct is located inside the housing, and a purification component, a flow guide cover and a centrifugal fan component are arranged in the air duct from bottom to top, the air inlet of the purification component is opposite to its air outlet up and down, and part of the air of this air purifier is exhausted upwards, and the exhaust direction is different from the air delivery direction of the impeller, which increases the wind loss. Its air outlet only adopts a mesh form, which has an obstructive effect on the discharged gas, increases the load of the impeller, reduces the air discharge volume, and also generates noise. Summary of the Invention

[0004] One of the purposes of the present invention is to provide a side air outlet structure, which solves the problems of large pneumatic noise during exhaust and low exhaust efficiency caused by large resistance in the internal flow channel.

[0005] To achieve the above-mentioned invention purpose, the technical solution adopted by the present invention is as follows:

[0006] A side air outlet structure includes a housing, an air outlet grille, an impeller and a flow guide cover. The air outlet grille is arranged at the top of the housing, the impeller is arranged in the housing and below the air outlet grille, the flow guide cover surrounds the impeller and guides the airflow generated by the impeller to the air outlet grille. The air outlet grille includes a plurality of guide vanes, the plurality of guide vanes are arranged on the circumference of the top of the housing, the guide vanes are arranged radially along the impeller, and the cross-sectional shape of the guide vane is set to be streamlined, so as to improve the air outlet efficiency and reduce the noise through lateral air outlet.

[0007] The impeller includes impeller blades, the impeller blades are shark biomimetic wings, and the ratio of the arc length to the radius of the cross-section of the impeller blade is K, where 0.4 < K < 0.8, and a suitable airfoil reduces the resistance of air flow.

[0008] The angle α between the outer edge of the cross section of the impeller blade and the tangent of the outlet circumference of the impeller blade is equal to the angle β between the outer edge of the cross section of the inlet side of the guide vane and the tangent of the inlet circumference of the guide vane, so that the air outlet of the impeller blade is directly and smoothly injected into the guide vane, reducing the pressure loss along the friction.

[0009] The ratio of the height of the air outlet grille to the diameter of the air outlet of the air outlet grille is not less than 0.275, which is used to reduce the resistance to airflow.

[0010] It also includes an upper wheel cover and a lower wheel cover. The upper wheel cover is located on the top of the wind turbine, and the lower wheel cover is located on the bottom of the wind turbine. The lower wheel cover is flared, with the air inlet end of the lower wheel cover being smaller than the air outlet end of the lower wheel cover. The tangent of the air inlet end of the lower wheel cover is perpendicular to the tangent of the air outlet end of the lower wheel cover. The lower wheel cover is fitted inside the air guide shroud to protect the wind turbine and prevent air leakage.

[0011] It also includes an air guide ring, which is disposed on the air inlet end of the impeller. The air inlet end of the air guide ring is expanded, and the air outlet end of the air guide ring is straight, thereby increasing the air intake of the impeller.

[0012] The air guide includes a flow stabilizing section, a smoothing section, and a flow guiding section arranged in sequence. The flow stabilizing section surrounds the outer edge of the lower wheel cover to prevent the airflow of the impeller from flowing back. The smoothing section is connected to the flow guiding section. The flow guiding section is set in an inclined shape. The end of the flow guiding section near the impeller is constricted, and the end near the air outlet grille is expanded to guide the air output by the impeller to the air outlet grille and prevent the air from flowing back from the gap.

[0013] The end of the flow stabilizer is flush with the end of the lower wheel cover, which improves the tightness of the connection between the flow guide and the impeller.

[0014] It also includes a drive motor, which is built into the impeller, reducing the volume of the side air outlet structure and making the installation more compact.

[0015] The second objective of this invention is to provide an air purifier that solves the problem of low purification flow rate in air purifiers.

[0016] To achieve the above-mentioned objectives, the technical solution adopted by the present invention is as follows:

[0017] An air purifier includes the aforementioned side-exit structure and filter element. The filter element is disposed below the side-exit structure. An air inlet is provided on the side wall of the housing, and the air inlet is connected to the air inlet end of the impeller for circulating and purifying indoor air.

[0018] The beneficial effects of this invention are as follows:

[0019] (1) The side air outlet structure is equipped with an air outlet grille, a wind wheel and a guide shroud. The guide shroud surrounds the wind wheel, and the air outlet end of the wind wheel is aligned with the air inlet end of the air outlet grille. The guide blades on the air outlet grille are arranged radially along the wind wheel and are streamlined, which can discharge the air output from the wind wheel in the circumferential direction, reduce the load on the wind wheel, and improve the exhaust efficiency. The streamlined blades reduce aerodynamic noise.

[0020] (2) The angle between the outer edge of the cross-section of the wind turbine blade and the air outlet is equal to the angle between the air inlet side of the guide vane. The airflow does not need to change direction when entering the air outlet grille from the wind turbine, which reduces the resistance and noise of the gas flow. The guide shroud is equipped with a guide section and a flow stabilizing section. The flow stabilizing section surrounds the lower wheel cover and can return the gas output by the wind turbine. The guide section is arranged obliquely upward, which can smoothly guide the airflow to the air outlet grille for discharge. The airflow discharge efficiency is high and the noise is low.

[0021] (3) The impeller on this side air outlet structure is equipped with a lower wheel cover and an air guide ring. The air guide ring is fitted inside the lower wheel cover. The air outlet end of the air guide ring partially overlaps with the air inlet end of the lower wheel cover. The air inlet end of the air guide ring is flared to enhance the collection of airflow and reduce the noise of airflow entering the impeller.

[0022] (4) The air purifier takes in air through the air inlet on the lower shell. After passing through the filter in the shell, the air is drawn in by the impeller and then discharged to the side of the air purifier through the air outlet grille. The exhaust gas has a large flow rate and low noise, which reduces the overall energy consumption. Attached Figure Description

[0023] Figure 1 An isometric view of the side-exhaust structure provided by the present invention;

[0024] Figure 2 This is a front view of the side-exhaust structure provided by the present invention;

[0025] Figure 3 for Figure 2 The cross-sectional view shown along the upper AA line;

[0026] Figure 4 for Figure 3 The partial view shown at the top B section;

[0027] Figure 5 The gas flow diagram of the air purifier provided by this invention;

[0028] Figure 6 A schematic diagram of the angles of the wind turbine blades and guide vanes provided for the present invention;

[0029] Figure 7 The blade structure diagram provided for this invention.

[0030] Reference numerals:

[0031] 1. Air outlet grille; 11. Flow guiding blades; 2. Housing; 21. Air inlet; 3. Filter element; 4. Upper wheel cover; 5. Driving motor; 6. Lower wheel cover; 7. Wind wheel; 71. Wind wheel blades; 8. Air guiding ring; 9. Air guiding cover; 91. Flow stabilizing part; 92. Smoothing part; 93. Flow guiding part. Detailed implementation manners

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0033] Embodiment 1

[0034] As Figures 1-7 shown, a side air outlet structure includes a housing 2, an air outlet grille 1, a wind wheel 7 and an air guiding cover 9. The air outlet grille 1 is arranged at the top of the housing 2, and the wind wheel 7 is arranged in the housing 2 and below the air outlet grille 1. It is characterized in that: the air guiding cover 9 is arranged around the wind wheel 7 to guide the air flow generated by the wind wheel 7 towards the air outlet grille 1. The air outlet grille 1 includes a plurality of flow guiding blades 11. The plurality of flow guiding blades 11 are arranged on the circumference at the top of the housing 2. The flow guiding blades 11 are arranged radially along the wind wheel 7 and point to the outside of the housing 2. The leaf profile section of the flow guiding blade 11 is set to be streamline.

[0035] Refer to Figure 7 , the wind wheel 7 includes wind wheel blades 71. The wind wheel blades 71 are shark bionic wings. The ratio of the arc length to the radius of the cross section of the wind wheel blade 71 is K, where 0.4 < K < 0.8. Through experiments and simulations, it is confirmed that the maximum lift-drag ratio of the airfoil is located between 0.4 < K < 0.8 (the lift-drag ratio of the airfoil is a parameter characterizing the aerodynamic efficiency of the airfoil, and the larger the value, the higher the aerodynamic efficiency of the airfoil). The arc length of the arc edge of the wind wheel blade 71 is C, the radius is R, and K = C / R. By adjusting the value of K, the midline of the arc edge of the wind wheel blade 71 is adjusted. The specific airfoil of the wind wheel blade 71 is determined by equally dividing the angle and offsetting the coordinates with the K value. Refer to Table 1 below, where the first and second rows of the table are fixed dimensionless parameters; the angle in(i) = γ * [X(i + 1) - X(i)]; the chord length corresponding to the arc length is b; the mid-arc line is divided into 16 groups of points (excluding the first and last coordinate points) by equally dividing the angle, with two coordinate points in each group. The offset of the coordinate points from the mid-arc line is ±Y × b.

[0036] Among them, the shark-inspired wing is the most typical design in the cross-section of the wing. Its cross-section is curved at the top and flat at the bottom, with the most protruding part being 30% of the chord length. According to Bernoulli's principle, this type of wing cross-section will make the airflow speed over the upper wing surface faster than the airflow speed over the lower wing surface. The upper part of the wing is a low-pressure area, while the lower part is a high-pressure area.

[0037]

[0038] γ i =γ×(x i+1 -x i ); 0 ≤ i ≤ 25 and are integers

[0039] X i For the discrete values ​​of the shark bionic wing along the X-axis, Y... i For the shark bionic wing, the Y-axis direction is fixed, and the value is determined by (X). i ,Y i ) is drawn as the mid-arc line of the shark bionic wing; b is the chord length of the mid-arc line of the shark bionic wing, Y i '=±b×Y i For (X) i ,Y i The corresponding offset distance; linking coordinate points (X) via spline curves. i ', Y i The image was drawn as a shark-inspired wing, where Y... i ' represents the offset distance, Y i "These are the coordinates of the shark-inspired wing."

[0040] Table 1 is as follows:

[0041]

[0042] See Figure 6 Preferably, the angle α between the outer edge of the cross section of the impeller blade 71 and the tangent of the air outlet circumference of the impeller blade 71 is equal to the angle β between the outer edge of the cross section of the guide vane 11 on the air inlet side and the tangent of the air inlet circumference of the guide vane 11. After the air is discharged from the impeller blade 71, the airflow direction is flush with the air inlet end of the guide vane 11. The air is discharged outward through the guide vane 11, reducing the resistance encountered by the airflow during the flow process, thereby improving the airflow efficiency and reducing noise generation.

[0043] Preferably, the ratio of the height of the air outlet grille 1 to the diameter of the air outlet of the air outlet grille 1 is not less than 0.275. When the diameter of the air outlet is constant, increasing the height of the air outlet is beneficial to reducing the air flow resistance of the air outlet, improving the air outlet efficiency and reducing the generation of noise.

[0044] Preferably, it also includes an upper wheel cover 4 and a lower wheel cover 6. The upper wheel cover 4 is located on the top of the impeller 7 and closes the upper end of the impeller 7 to prevent foreign objects from entering. The lower wheel cover 6 is located at the bottom of the impeller 7 and is flared. The air inlet end of the lower wheel cover 6 is smaller than the air outlet end of the lower wheel cover 6. The tangent of the air inlet end of the lower wheel cover 6 is perpendicular to the tangent of the air outlet end of the lower wheel cover 6. The lower wheel cover 6 is fitted inside the guide shroud 9 to prevent airflow from overflowing.

[0045] Preferably, it also includes an air guide ring 8, which is set on the air inlet end of the impeller 7. The air inlet end of the air guide ring 8 is expanded to increase the cross-sectional area for receiving air, and the air outlet end of the air guide ring 8 is straight. The airflow is injected into the impeller 7 along the straight inner wall of the air guide ring 8, reducing the resistance it is subjected to, reducing the generation of turbulence and increasing the load on the impeller 7.

[0046] See details Figure 4 Preferably, the air deflector 9 includes a flow stabilizing section 91, a smoothing section 92, and a flow guiding section 93 arranged sequentially. The flow stabilizing section 91 surrounds the outer edge of the lower wheel cover 6 to prevent the airflow of the impeller 7 from flowing back. The smoothing section 92 is connected to the flow guiding section 93 and is flush with the end of the lower wheel cover 6, guiding the air discharged laterally from the impeller 7 to the flow guiding section 93. The flow guiding section 93 is set in an inclined shape, and its inner wall is curved. The part connected to the smoothing section 92 is smoothly transitioned. The end of the flow guiding section 93 near the impeller 7 is constricted, and the end near the air outlet grille 1 is expanded, which can quickly discharge the pressurized gas.

[0047] Preferably, the end of the flow stabilizer 91 is flush with the end of the lower wheel cover 6 to prevent air from entering the flow guide shroud 9 and to prevent the gas discharged from the impeller 7 from flowing back.

[0048] Preferably, it also includes a drive motor 5, which is built into the impeller 7 to reduce the size of the impeller 7 and improve the aesthetics of the product.

[0049] Example 2

[0050] Referring to Embodiment 1, the same features will not be repeated. An air purifier includes a side-exit structure and a filter element 3. The filter element 3 is located below the side-exit structure and is detachably connected to facilitate replacement after the filter element 3 reaches the end of its service life. Two air inlets 21 are provided on the side wall of the housing 2. The air inlets 21 are connected to the air inlet end of the impeller 7 through the filter element 3. The two air inlets 21 are symmetrically distributed on the outer wall of the housing 2 to increase the air intake flow.

[0051] The air purifier works as follows:

[0052] Place the air purifier on a flat surface, clear away any items around it to ensure unobstructed airflow, and connect the power supply. The air purifier will then begin to operate. The impeller 7 rotates and draws in air through the air inlet 21. After being filtered by the filter element 3, the air passes through the air guide ring 8 and converges into the impeller 7. The impeller 7 propels the air outward, allowing it to flow through the smooth part 92 of the guide shroud 9 to the guide section 93. The guide section 93 deflects the airflow, ensuring that most of the air is accurately delivered to the guide vanes 11. The remaining airflow is blocked by the flow stabilizer 91 and flows into the guide vanes 11, preventing it from flowing back into the filter element 3 and re-entering the impeller 7, thus reducing the load on the impeller 7. The air is then evenly discharged to the outside along the direction of the guide vanes 11. The impeller 7 continuously draws in air, achieving air circulation and purification.

[0053] Based on the disclosure and teachings of the foregoing specification, those skilled in the art can make changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and any modifications and changes to the present invention should also fall within the protection scope of the claims of the present invention. Furthermore, although some specific terms are used in this specification, these terms are only for convenience of explanation and do not constitute any limitation on the present invention.

Claims

1. A side air outlet structure, comprising a shell (2), an air outlet grille (1), an air wheel (7) and a flow guide cover (9), the air outlet grille (1) is arranged at the top of the shell (2), the air wheel (7) is arranged in the shell (2) and below the air outlet grille (1), characterized in that: The air guide shroud (9) is arranged around the impeller (7) to guide the airflow generated by the impeller (7) to the air outlet grille (1). The air outlet grille (1) includes a plurality of air guide blades (11). The plurality of air guide blades (11) are arranged on the circumference of the top of the housing (2). The air guide blades (11) are arranged to be radially distributed along the impeller (7). The blade cross-section of the air guide blades (11) is arranged to be streamlined. The wind turbine (7) includes wind turbine blades (71), which are shark-inspired winglets. The ratio of the arc length to the radius of the cross-section of the wind turbine blades (71) is K, where 0.4 <K<0.8; The cross-section of the shark bionic wing is curved at the top and flat at the bottom, and the most protruding part of the shark bionic wing is at 30% of the chord length. The angle α between the outer edge of the cross section of the wind turbine blade (71) and the tangent of the air outlet circumference of the wind turbine blade (71) is equal to the angle β between the outer edge of the cross section of the guide vane (11) on the air inlet side and the tangent of the air inlet circumference of the guide vane (11). It also includes an upper wheel cover (4) and a lower wheel cover (6). The upper wheel cover (4) is located on the top of the impeller (7), and the lower wheel cover (6) is located at the bottom of the impeller (7). The lower wheel cover (6) is flared. The air inlet end of the lower wheel cover (6) is smaller than the air outlet end of the lower wheel cover (6). The tangent of the air inlet end of the lower wheel cover (6) is perpendicular to the tangent of the air outlet end of the lower wheel cover (6). The lower wheel cover (6) is fitted inside the guide shroud (9).

2. The side-discharge air structure according to claim 1, characterized in that: The ratio of the height of the air outlet grille (1) to the diameter of the air outlet of the air outlet grille (1) is not less than 0.

275.

3. The side-discharge air structure according to claim 1, characterized in that: It also includes an air guide ring (8), which is set on the air inlet end of the impeller (7). The air inlet end of the air guide ring (8) is expanded, and the air outlet end of the air guide ring (8) is straight.

4. The side-discharge air structure according to claim 1, characterized in that: The air guide cover (9) includes a flow stabilizing part (91), a smoothing part (92) and a flow guiding part (93) arranged in sequence. The flow stabilizing part (91) surrounds the outer edge of the lower wheel cover (6) to prevent the airflow of the impeller (7) from flowing back. The smoothing part (92) is connected to the flow guiding part (93). The flow guiding part (93) is set in an inclined shape. The end of the flow guiding part (93) close to the impeller (7) is constricted, and the end close to the air outlet grille (1) is expanded.

5. The side-discharge air structure according to claim 4, characterized in that: The end of the flow stabilizer (91) is flush with the end of the lower wheel cover (6).

6. The side-exhaust structure according to claim 1, characterized in that: It also includes a drive motor (5), which is built into the wind turbine (7).

7. An air purifier, characterized in that: Includes the side-outlet air structure and filter element (3) as described in any one of claims 1-6, wherein the filter element (3) is disposed below the side-outlet air structure, and an air inlet (21) is provided on the side wall of the housing (2), wherein the air inlet (21) is connected to the air inlet end of the impeller (7).

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