Rectification device of air purifier and air purifier

Abstract

The present invention discloses a rectifier device for an air purifier and an air purifier. Based on the present invention, the multiple-circle air duct of the rectifier device can be used to rectify the clean gas into a layered airflow layer, and the layered airflow layers of each circle of the air duct can produce a speed difference with a flow rate decreasing from the inner circle to the outer circle. Since the flow rate of the airflow layer of the outer circle is relatively small, the gas pressure difference between the airflow layer of the outer circle and the external environment where the air purifier is located is also relatively small. Therefore, the ability of the airflow layer of the outer circle to resist the influx of impurity-carrying gas from the external environment is relatively stronger, so as to form an anti-doping protection for the airflow layer of the inner circle, and then reduce the clean gas output by the air purifier from the impact of the impurity anti-doping in the external environment, thereby improving the efficiency of the clean gas received by the human body. In addition, the airflow layers flowing out in layers are relatively orderly, which is conducive to reducing the airflow turbulence formed in the external environment, and it is even possible to achieve the effect of zero wind feeling in the surrounding direction.

Description

Technical Field

[0001] The invention relates to the field of gas purification, and in particular to a rectifier device for an air purifier and an air purifier using the rectifier device. Background Art

[0002] The health hazards caused by air pollution are becoming increasingly serious, and the use of air purification equipment is becoming more and more widespread.

[0003] Common air purification equipment is mostly shared equipment that covers the entire indoor area, such as fresh air systems, floor-standing purifiers, etc. However, as the public's attention to personal health varies, there is also a demand for small air purifiers that provide local area coverage (the so-called "small" refers to most shared equipment).

[0004] For air purifiers that focus more on local areas, how to reduce the contamination of the discharged clean gas with impurities in the external environment has become a technical problem to be solved. Summary of the invention

[0005] In one embodiment of the present invention, a rectifying device for an air purifier is provided, comprising a plurality of rectifying grid rings;

[0006] A plurality of rectifying grid rings are stacked in a ring sleeve to form a multi-circle air duct, so that the airflow flowing into the rectifying device flows out in layers through the multi-circle air duct;

[0007] The cross-sectional expansion rate of each circle of air duct in the air flow direction increases from the inner circle to the outer circle, so as to produce a speed difference in which the flow velocity of the stratified air flow layer decreases from the inner circle to the outer circle.

[0008] Optionally, the plurality of rectifying grid rings increase the cross-sectional expansion rate of each circle of the air duct in the air flow direction from the inner circle to the outer circle by tilting and offsetting the ring wall in the radial direction.

[0009] Optionally, the cross-sectional expansion rate of each circle of the air duct in the air flow direction increases from the inner circle to the outer circle by changing the wall thickness of the ring wall in the radial direction.

[0010] Optionally, the cross-sectional area of ​​the outermost circle of air ducts on the air inlet side is less than or equal to the cross-sectional area of ​​the air inlet sides of the other circles of air ducts.

[0011] Optionally, the cross-sectional expansion rate of the innermost circle air duct is a value representing a negative growth of the cross-sectional area.

[0012] Optionally, it further includes fixed ribs, and multiple rectifier rings are fixedly connected via the fixed ribs.

[0013] Optionally, the plurality of rectifying grid rings are arranged concentrically, and the plurality of fixing ribs are distributed at equal angles and extend along the radial direction of the plurality of rectifying grid rings.

[0014] Optionally, the outermost rectifying grid ring forms a detachable interface on the air inlet side where the air flows in, which is docked with the air outlet of the air purifier.

[0015] Optionally, the detachable interface includes threads and / or snaps.

[0016] Another embodiment of the present invention provides an air purifier, including a purifier host, wherein the air outlet of the purifier host is equipped with the above-mentioned rectifying device.

[0017] As can be seen above, based on the above embodiments, the clean gas can be rectified into stratified outflowing airflow layers by using the multi-circle air duct of the rectifying device, and the stratified outflowing airflow layers of each circle of the air duct can produce a speed difference with the flow velocity decreasing from the inner circle to the outer circle. Since the flow velocity of the airflow layer of the outer circle is relatively small, the gas pressure difference between the airflow layer of the outer circle and the external environment where the air purifier is located is also relatively small. Therefore, the airflow layer of the outer circle has a relatively stronger ability to resist the inflow of impurity-carrying gas from the external environment, so as to form anti-doping protection for the airflow layer of the inner circle, thereby reducing the impact of the clean gas output by the air purifier on the anti-doping of impurities in the external environment, thereby improving the efficiency of the clean gas received by the human body. In addition, the stratified outflowing airflow layers are relatively orderly, which is conducive to reducing the airflow turbulence formed in the external environment, and it is even possible to achieve the effect of zero wind sensation in the surrounding direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The following drawings are only used to illustrate and explain the present application, and do not limit the scope of the present application:

[0019] Figure 1 is a schematic diagram of the principle structure of an air purifier in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 AA section view;

[0021] Figure 3 for Figure 1 A cross-sectional view of a rectifying device of an air purifier shown in FIG.

[0022] Figure 4 is a schematic cross-sectional structural diagram of a rectifying device of an air purifier in another embodiment;

[0023] Figure 5 The figure is a schematic cross-sectional structure diagram of a rectifying device of an air purifier in yet another embodiment.

[0024] Description of reference numerals:

[0025] 10. Air purifier; 20. Purifier host; 200. Purification chamber; 21. Base; 22. Body; 23. Air outlet; 30. Rectification device; 31. First rectifying grid ring; 310. First air duct; 32. Second rectifying grid ring; 320. Second air duct; 33. Third rectifying grid ring; 330. Third air duct; 34. Fourth rectifying grid ring; 340. Fourth air duct; 35. Fixed rib; 36. Removable interface; 41. Fifth Rectifier grid ring; 410, fifth wind duct; 42, sixth rectifying grid ring; 420, sixth wind duct; 43, seventh rectifying grid ring; 430, seventh wind duct; 44, eighth rectifying grid ring; 440, eighth wind duct; 51, ninth rectifying grid ring; 510, ninth wind duct; 52, tenth rectifying grid ring; 520, tenth wind duct; 53, eleventh rectifying grid ring; 530, eleventh wind duct; 54, twelfth rectifying grid ring; 540, twelfth wind duct. DETAILED DESCRIPTION

[0026] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0027] Figure 1 The figure is a schematic diagram of the principle structure of an air purifier in one embodiment of the present invention. Figure 2 for Figure 1 AA profile of . See Figure 1 and Figure 2 In one embodiment, an air purifier 10 may include a purifier host 20 and a rectifying device 30 .

[0028] The purifier host 20 may include a base 21 and a body 22. The base 21 supports the body 22, and the base 21 may have a structure that facilitates the purifier host 20 to be placed on a table, cabinet or other home furniture or office furniture, so that the clean airflow generated by the purifier host 20 covers the local area where the human body is located near the home furniture or office furniture. The body 22 has components required for air purification such as a motor and a filter ( Figure 1 (not shown), and a purification chamber 200 is provided in the machine body 22, and the gas flowing into the purification chamber 200 from the external environment can be processed into a clean airflow and discharged from the air outlet 23 connected to the purification chamber 200.

[0029] The rectifying device 30 is installed at the air outlet 23 of the purifier host 20 to rectify the clean airflow output from the air outlet 23 of the purifier host 20 into a plurality of layered airflow layers, and there are speed differences and pressure differences between the plurality of airflow layers.

[0030] Next, the principle of forming speed difference and pressure difference between multiple air flow layers is described in detail.

[0031] The gas flow continuity equation obtained from the law of conservation of mass in fluid mechanics can be expressed as the following formula (1):

[0032] ρ1v1A1=ρ2v2A2=c Formula (1)

[0033] The Bernoulli equation for incompressible fluid in fluid mechanics can be expressed as the following formula (2):

[0034] P1 / (ρ1g h1)+v12 / 2gh1=P2 / (ρ2g h2)+v22 / 2gh2 Formula (2)

[0035] In the above formulas (1) and (2), ρ1 and ρ2 represent fluid density, v1 and v2 represent fluid flow velocity, A1 and A2 represent cross-sectional areas of fluid flow paths, c represents a constant, P1 and P2 represent fluid pressure, g represents gravitational acceleration, and h1 and h2 represent heights of the fluid relative to a reference plane.

[0036] For the same fluid, that is, ρ1=ρ2:

[0037] From formula (1), we can see that the larger the cross-sectional area of ​​the fluid flow path, the lower the flow rate of the fluid;

[0038] It can be seen from formula (2) that when h1 and h2 are equal or similar, the lower the flow rate of the fluid, the higher the pressure of the fluid.

[0039] Based on the above principle, the rectifying device 30 is intended to produce a speed difference in which the flow velocity of the stratified outflowing air layer decreases from the inner circle to the outer circle, so that the pressure of the air flow layer in the outer circle is higher than the pressure of the air flow layer in the inner circle. Accordingly, the gas pressure difference between the air flow layer in the outer circle and the external environment where the air purifier is located is relatively small, so that the air flow layer in the outer circle has a relatively stronger ability to resist the inflow of impurity-carrying gas from the external environment.

[0040] It can be understood that, in actual design, the difference in speed difference between each airflow layer can be considered to compensate for the height difference of the fluid relative to the reference plane, or, if the size of the purifier host 20 and the rectifier 30 is small enough, the height difference of each airflow layer relative to the reference plane has a negligible effect on the relationship between flow rate and pressure, that is, the height difference of each airflow layer relative to the reference plane can also be ignored.

[0041] The rectifying device 30 may include a plurality of rectifying gate rings. Figure 1 and Figure 2 In the figure, four gate rings, namely, the first rectifying gate ring 31 , the second rectifying gate ring 32 , the third rectifying gate ring 33 and the fourth rectifying gate ring 34 are taken as an example.

[0042] Multiple rectifier rings are stacked to form multiple wind ducts, namely:

[0043] A first air duct 310 is formed inside the first rectifying grid ring 31;

[0044] The second rectifying grid ring 32 is looped around the outer ring of the first rectifying grid ring 31, and a closed annular second air duct 320 is formed between the second rectifying grid ring 32 and the first rectifying grid ring 31;

[0045] The third rectifying grid ring 33 is looped around the outer ring of the second rectifying grid ring 32, and a closed annular third air duct 330 is formed between the third rectifying grid ring 33 and the second rectifying grid ring 32;

[0046] The fourth rectifying grid ring 34 is looped around the outer ring of the third rectifying grid ring 33 , and a closed annular fourth air duct 340 is formed between the fourth rectifying grid ring 34 and the third rectifying grid ring 33 .

[0047] Based on the multiple circles of air ducts (for example, the first air duct 310, the second air duct 320, the third air duct 330 and the fourth air duct 340) formed by the stacked rings of the above-mentioned multiple rectifying grid rings (for example, the first rectifying grid ring 31, the second rectifying grid ring 32, the third rectifying grid ring 33 and the fourth rectifying grid ring 34), the airflow flowing into the rectifying device 30 from the air outlet 23 of the purifier host 20 can flow out in layers through the multiple circles of air ducts (for example, the first air duct 310, the second air duct 320, the third air duct 330 and the fourth air duct 340).

[0048] Furthermore, the cross-sectional expansion rate of each circle of air ducts (for example, the first air duct 310, the second air duct 320, the third air duct 330 and the fourth air duct 340) in the air flow direction increases from the inner circle to the outer circle, that is:

[0049] The cross-sectional area of ​​the first air duct 310 gradually changes from the air inlet side to the air outlet side at a cross-sectional expansion rate Rate1;

[0050] The cross-sectional area of ​​the second air duct 320 gradually changes from the air inlet side to the air outlet side at a cross-sectional expansion rate Rate2;

[0051] The cross-sectional area of ​​the third air duct 330 gradually changes from the air inlet side to the air outlet side at a cross-sectional expansion rate Rate3;

[0052] The cross-sectional area of ​​the fourth air duct 340 gradually changes from the air inlet side to the air outlet side at a cross-sectional expansion rate Rate4;

[0053] Furthermore, Rate4>Rate3>Rate2>Rate1.

[0054] The cross-sectional expansion rate refers to the growth rate of the cross-sectional area of ​​the air duct on the air outlet side compared to the cross-sectional area on the air inlet side close to the purifier main unit 20. In actual design, the cross-sectional expansion rates of all air ducts may all be values ​​indicating a positive growth in the cross-sectional area, or some of the cross-sectional expansion rates may be values ​​indicating a negative growth in the cross-sectional area, and the value indicating a positive growth in the cross-sectional area must be higher than the value indicating a negative growth in the cross-sectional area.

[0055] As mentioned in the formula (1) above, the greater the cross-sectional expansion rate of the air duct, the greater the velocity reduction rate of the gas flowing through the air duct. Therefore, whether the cross-sectional areas of all air ducts are designed to increase positively or the cross-sectional areas of some air ducts are allowed to increase negatively, as long as the cross-sectional expansion rate of each circle of air ducts (for example, the first air duct 310, the second air duct 320, the third air duct 330 and the fourth air duct 340) in the air flow direction increases from the inner circle to the outer circle, a velocity difference can be generated in which the velocity of the stratified air flow layer decreases from the inner circle to the outer circle.

[0056] Moreover, multiple rectifying grid rings (for example, the first rectifying grid ring 31, the second rectifying grid ring 32, the third rectifying grid ring 33 and the fourth rectifying grid ring 34) are concentrically arranged in this embodiment. Therefore, the equivalent heights of the air flow layers flowing out of each air duct compared to the reference plane (for example, the bottom surface of the base 21) are basically the same, that is, the height difference of the air flow layers flowing out of each air duct compared to the reference plane can be ignored, so that the gas pressure of the layered air flow layers increases from the inner circle to the outer circle with each circle.

[0057] Accordingly, since the flow velocity of the airflow layer of the outer ring (i.e., the airflow layer flowing out from the fourth air duct 340) is relatively small, the gas pressure difference between the airflow layer of the outer ring and the external environment in which the air purifier is located is also relatively small, so that the airflow layer of the outer ring is relatively more capable of resisting the influx of impurity-carrying gas from the external environment, so as to form anti-doping protection for the airflow layer of the inner ring, thereby reducing the impact of the clean gas output by the air purifier on the anti-doping of impurities in the external environment, thereby improving the efficiency of the clean gas received by the human body. In addition, the airflow layers flowing out in layers are relatively orderly, which is conducive to reducing the airflow turbulence formed in the external environment, and it is even possible to achieve the effect of zero wind sensation in the surrounding direction.

[0058] from Figure 1 It can also be seen that the rectifying device 30 also includes fixed ribs 35, and multiple rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34) are fixedly connected by the fixed ribs 35, and the multiple fixed ribs 35 are distributed at equal angles and extend along the radial direction of the multiple rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34). Figure 1Four fixing ribs 35 spaced 90 degrees apart are taken as an example, but the actual application is not limited thereto.

[0059] In addition, from Figure 2 It can be seen that the outermost rectifying grid ring, i.e., the fourth rectifying grid ring 34, forms a detachable interface 36 on the air inlet side where the airflow flows in, which is docked with the air outlet 23 of the purifier host 20. For example, the detachable interface may include a structure such as a thread and / or a snap-on connection that is stable and detachable.

[0060] Figure 3 for Figure 1 The cross-sectional structure diagram of the rectifier device of the air purifier is shown in FIG. Figure 3 As shown, multiple rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34) increase the cross-sectional expansion rate of each circle of air ducts (for example, the first air duct 310, the second air duct 320, the third air duct 330 and the fourth air duct 340) in the direction of air flow from the inner circle to the outer circle by tilting the ring wall in the radial direction.

[0061] exist Figure 3 In the example, the ring walls of the rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34) are all tilted and offset outward in the radial direction. Specifically, the tilt offset angle of the ring walls of the plurality of rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34) in the radial direction increases from the inner circle to the outer circle, the tilt offset angle difference between every two adjacent rectifying gate rings increases from the inner circle to the outer circle, and the tilt offset angle difference between every two adjacent rectifying gate rings is greater than the tilt offset angle of the first rectifying gate ring 31 of the innermost circle, that is:

[0062] The ring wall of the first rectifying grid ring 31 has an inclination offset angle of β1 relative to the axial direction, so as to form a cross-sectional expansion from the air inlet side to the air outlet side with an expansion angle of β1;

[0063] The ring wall of the second rectifying grid ring 32 is tilted and offset at an angle β2 relative to the axial direction, so as to form a cross-sectional expansion from the wind inlet side to the wind outlet side with an expansion angle α1, wherein β2>β1, and α1 is β2-β1;

[0064] The ring wall of the third rectifying grid ring 33 has an inclination offset angle β3 relative to the axial direction, so as to form a cross-sectional expansion from the wind inlet side to the wind outlet side with an expansion angle α2, wherein β3>β2, and α2 is β3-β2;

[0065] The ring wall of the fourth rectifying grid ring 34 has an inclination offset angle of β4 relative to the axial direction, so as to form a cross-sectional expansion from the wind inlet side to the wind outlet side with an expansion angle of α3, wherein β4>β3, and α3 is β4-β3;

[0066] Furthermore, β1<α1<α2<α3.

[0067] Therefore, the tilt offset angle of multiple rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34) can make the expansion angle of each circle of wind duct (for example, the first wind duct 310, the second wind duct 320, the third wind duct 330 and the fourth wind duct 340) increase from the inner circle to the outer circle, thereby making the cross-sectional expansion rate of each circle of wind duct (for example, the first wind duct 310, the second wind duct 320, the third wind duct 330 and the fourth wind duct 340) in the airflow flow direction increase from the inner circle to the outer circle.

[0068] In addition, among multiple rectifying gate rings (for example, the first rectifying gate ring 31, the second rectifying gate ring 32, the third rectifying gate ring 33 and the fourth rectifying gate ring 34), the outer diameters of the non-outermost first rectifying gate ring 31, the second rectifying gate ring 32 and the third rectifying gate ring 33 can increase proportionally, that is, the ring opening diameter on the air inlet side of the first rectifying gate ring 31 is d, the ring opening diameter on the air inlet side of the second rectifying gate ring 32 is 2 times of d, and the ring opening diameter on the air inlet side of the third rectifying gate ring 33 is 3 times of d, so that the cross-sectional areas of the first air duct 310, the second air duct 320 and the third air duct 330 on the air inlet side are equal, thereby achieving uniform distribution of the flow rate of clean airflow in the first air duct 310, the second air duct 320 and the third air duct 330.

[0069] The fourth air duct 340 formed by the fourth rectifying grid ring 34 in the outermost circle is more inclined to form a protective isolation airflow layer with the lowest pressure difference with the external environment. Therefore, the required gas flow rate can be slightly less. Accordingly, the incremental step difference of the fourth rectifying grid ring 34 compared with the third rectifying grid ring 33 can be slightly smaller than the geometric incremental step between other rectifying grid rings other than the outer circle. Accordingly, the cross-sectional area of ​​the fourth air duct 340 on the air inlet side can be smaller than the cross-sectional areas of the first air duct 310, the second air duct 320 and the third air duct 330 on the air inlet side.

[0070] For example, the diameter of the ring opening on the wind inlet side of the first rectifying grid ring 31 can be 40 mm, the diameter of the ring opening on the wind inlet side of the second rectifying grid ring 32 can be 80 mm, the diameter of the ring opening on the wind inlet side of the third rectifying grid ring 33 can be 120 mm, and the diameter of the ring opening on the wind inlet side of the fourth rectifying grid ring 34 can be 150 mm. In addition, the ring wall thickness of each rectifying grid ring (for example, the first rectifying grid ring 31, the second rectifying grid ring 32, the third rectifying grid ring 33 and the fourth rectifying grid ring 34) is within the range of 1.5 mm-2 mm, and the axial dimension of each rectifying grid ring (for example, the first rectifying grid ring 31, the second rectifying grid ring 32, the third rectifying grid ring 33 and the fourth rectifying grid ring 34) can be set to 50 mm.

[0071] It is understandable that the cross-sectional area of ​​the fourth air duct 340 located in the outermost circle on the air inlet side can also be set to be equal to the cross-sectional area of ​​the first air duct 310, the second air duct 320 and the third air duct 330 on the air inlet side. That is, the incremental step difference of the fourth rectifying grid ring 34 compared with the third rectifying grid ring 33 can be equal to the geometric incremental step length between other rectifying grid rings other than the outer circle. For example, the ring opening diameter of the fourth rectifying grid ring 34 on the air inlet side can also be 160 mm.

[0072] Figure 4 It is a schematic diagram of the cross-sectional structure of a rectifying device of an air purifier in another embodiment. Figure 4 The fixing ribs and detachable interfaces are omitted. Figure 4 As shown, Figure 3 Similar to the structure shown in FIG. 1 , a plurality of rectifying grid rings (for example, the fifth rectifying grid ring 41, the sixth rectifying grid ring 42, the seventh rectifying grid ring 43 and the eighth rectifying grid ring 44) still increase the cross-sectional expansion rate of each circle of wind ducts (for example, the fifth wind duct 410, the sixth wind duct 420, the seventh wind duct 430 and the eighth wind duct 440) in the direction of airflow flow from the inner circle to the outer circle by tilting and offsetting the ring wall in the radial direction. Figure 3 The difference between the structures shown is that the fifth rectifying grid ring 41 of the innermost circle is tilted and offset inward in the radial direction, so that the cross-section of the fifth wind duct 410 of the innermost circle increases negatively, that is, the cross-section expansion rate of the fifth wind duct 410 of the innermost circle can be considered as a value indicating a negative increase in the cross-section area. At the same time, the seventh rectifying grid ring 43 and the eighth rectifying grid ring 44 are tilted outward in the radial direction, and the sixth rectifying grid ring 42 of the second inner circle is slightly tilted and offset inward in the radial direction in order to achieve a transition connection between the fifth rectifying grid ring 41 and the seventh rectifying grid ring 43 with opposite offset directions, and the cross-section expansion rates of the sixth wind duct 420, the seventh wind duct 430 and the eighth wind duct 440 are all values ​​indicating a positive increase in the cross-section area.

[0073] Based on Figure 4In the structure shown, the cross-sectional expansion rate of each circle of air ducts (for example, the fifth air duct 410, the sixth air duct 420, the seventh air duct 430 and the eighth air duct 440) in the air flow direction is still increasing from the inner circle to the outer circle, so that the gas pressure of the layered air flow layer increases from the inner circle to the outer circle. And on this basis, the fifth air duct 410 in the innermost circle produces a propulsion effect similar to accelerated output on the air flow layer in the innermost circle, so that the innermost circle air flow layer that is least susceptible to the influence of external environment doping can be output at a higher flow rate.

[0074] As Figure 4 As an extension of the structure shown, on the basis that the fifth rectifying grid ring 41 of the innermost circle and the sixth rectifying grid ring 42 of the second innermost circle are both inclined inwardly in the radial direction, the fifth wind duct 410 of the innermost circle and the sixth wind duct 420 of the second innermost circle can be set to have a cross-sectional expansion rate with a negative growth in cross-sectional area; or, it is also possible to set the other rectifying grid rings except the outermost circle (for example, the fifth rectifying grid ring 41, the sixth rectifying grid ring 42 and the seventh rectifying grid ring 43) to be inclined inwardly in the radial direction, and make the other circle wind ducts except the outermost circle (for example, the fifth wind duct 410, the sixth wind duct 420 and the seventh wind duct 430) have a cross-sectional expansion rate with a negative growth in cross-sectional area.

[0075] Figure 5 The figure is a schematic cross-sectional structure diagram of a rectifying device of an air purifier in yet another embodiment. Figure 5 The fixing ribs and detachable interfaces are omitted. Figure 5 As shown, multiple rectifying grid rings (for example, the ninth rectifying grid ring 51, the tenth rectifying grid ring 52, the eleventh rectifying grid ring 53 and the twelfth rectifying grid ring 54) increase the cross-sectional expansion rate of each circle of air ducts (for example, the ninth air duct 510, the tenth air duct 520, the eleventh air duct 530 and the twelfth air duct 540) in the direction of air flow from the inner circle to the outer circle by changing the wall thickness of the ring wall in the radial direction.

[0076] Based on Figure 5 In the structure shown, the gas pressure of the layered flow layer is still increased from the inner circle to the outer circle. On this basis, multiple rectifying grid rings (for example, the ninth rectifying grid ring 51, the tenth rectifying grid ring 52, the eleventh rectifying grid ring 53 and the twelfth rectifying grid ring 54) do not need to be tilted or offset in the radial direction or only have a small offset.

[0077] exist Figure 5In the figure, taking the example that the wall thickness of the ninth rectifying grid ring 51, the tenth rectifying grid ring 52, the eleventh rectifying grid ring 53 and the twelfth rectifying grid ring 54 in the radial direction gradually becomes thinner from the wind inlet side to the wind outlet side, the ninth wind duct 510, the tenth wind duct 520, the eleventh wind duct 530 and the twelfth wind duct 540 all have a cross-sectional expansion rate with a positive increase in cross-sectional area.

[0078] It is understandable that this does not mean that other wall thickness variation methods are excluded. For example, the wall thickness of the innermost ninth rectifying grid ring 51 can also be gradually increased, and the wall thickness of the second innermost tenth rectifying grid ring 52 can remain unchanged, so that the innermost ninth air duct 510 and the second innermost tenth air duct 520 have a cross-sectional expansion rate with a negative growth in cross-sectional area.

[0079] It can also be understood that the change in the wall thickness of the ring wall can also be combined with the inclination of the ring wall, as long as the cross-sectional expansion rate of each circle of the air duct in the air flow direction increases from the inner circle to the outer circle.

[0080] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the invention should be included in the scope of protection of the present invention.

Claims

1. A rectifier device for an air purifier, characterized in that: The rectifying device is used to be installed in the purifier host of the air purifier, and the clean airflow generated by the purifier host is used to cover a local area. The rectifying device is used to be installed at the air outlet of the purifier host, and the rectifying device includes a plurality of rectifying grid rings and fixed ribs, and the plurality of rectifying grid rings are fixedly connected by the fixed ribs; A plurality of rectifying grid rings are stacked in a ring sleeve to form a multi-circle air duct, so that the airflow flowing into the rectifying device flows out in layers through the multi-circle air duct; in: The cross-sectional expansion rate of each circle of air duct in the air flow direction increases from the inner circle to the outer circle, so as to produce a velocity difference of decreasing flow velocity from the inner circle to the outer circle for the stratified air flow layers; The cross-sectional expansion rate of each ring of the air duct in the air flow direction increases from the inner ring to the outer ring by tilting and offsetting the ring wall in the radial direction or changing the wall thickness.

2. The rectifying device according to claim 1, characterized in that: The cross-sectional area of ​​the outermost circle air duct on the air inlet side is less than or equal to the cross-sectional area of ​​the air inlet side of the other circles of air ducts.

3. The rectifying device according to claim 1, characterized in that: The cross-sectional expansion rate of the innermost circle air duct is a value indicating a negative growth in the cross-sectional area.

4. The rectifying device according to claim 1, characterized in that: The plurality of rectifying grid rings are arranged concentrically, and the plurality of fixing ribs are distributed at equal angles and extend along the radial direction of the plurality of rectifying grid rings.

5. The rectifying device according to claim 1, characterized in that: The outermost rectifying grid ring forms a detachable interface on the air inlet side where the air flows in, which is connected to the air outlet of the air purifier.

6. The rectifying device according to claim 5, characterized in that: The detachable interface includes threads and / or snaps.

7. An air purifier, characterized in that: It comprises a purifier host, wherein the air outlet of the purifier host is equipped with a rectifier device as claimed in any one of claims 1 to 6.

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