Dehumidifier

Abstract

The embodiment of the invention provides a dehumidifier, and relates to the technical field of household appliances. The dehumidifier comprises a shell, a centrifugal fan and a mesh enclosure, the mesh enclosure is arranged at the air outlet, the mesh enclosure is provided with a plurality of air guide ribs arranged in the preset direction, the preset direction is from the first end to the second end, and the number of the air guide ribs from the air guide rib closest to the air inlet to the n air guide ribs in the multiple air guide ribs is larger than or equal to 1. And the distance between the air guide ribs and the preset plane is gradually increased. The high-speed air blown out of the centrifugal fan can be blown out of the dehumidifier through the air guide ribs only after passing through a long distance, and therefore noise generated by impact of the high-speed air and the air guide ribs on the mesh enclosure is effectively reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a dehumidifier. Background Art

[0002] Dehumidifiers are also called dehumidifiers, dryers, and dehumidifiers. They can generally be divided into two categories: civil dehumidifiers and industrial dehumidifiers. They are a member of the air-conditioning family. Usually, a conventional dehumidifier consists of a compressor, a heat exchanger, a fan, a water tank, a casing, and a controller. Its working principle is: the fan draws humid air into the machine, passes through the heat exchanger, and the water molecules in the air condense into water droplets. The treated dry air is discharged from the machine. This cycle keeps the indoor humidity at a suitable relative humidity.

[0003] The inventor has found through research that some existing dehumidifiers produce relatively loud noise at the air outlet when they are in operation. Summary of the invention

[0004] The object of the present invention is to provide a dehumidifier which can reduce the noise at the air outlet when the dehumidifier is in operation.

[0005] The embodiment of the present invention is achieved as follows:

[0006] In a first aspect, the present invention provides a dehumidifier, comprising:

[0007] A housing having an air inlet and an air outlet;

[0008] A centrifugal fan is disposed in the housing and is used to guide the gas entering the air inlet to the air outlet. The centrifugal fan has a first end and a second end that are arranged at intervals and opposite to each other along its own axis, and the first end is closer to the air inlet than the second end;

[0009] A mesh cover, the mesh cover is arranged at the air outlet, the mesh cover is provided with a plurality of air guide ribs arranged along a preset direction, the preset direction is from the first end toward the second end, from the air guide rib closest to the air inlet among the plurality of air guide ribs to the direction of the nth air guide rib, the distance between the air guide ribs and the preset plane gradually increases, the preset plane is arranged opposite to the air outlet, the axis of the centrifugal fan falls into the preset plane, and the number of the plurality of air guide ribs is at least n.

[0010] Through the above arrangement, the high-speed wind blown out from the centrifugal fan needs to travel a long distance before passing through the air guide ribs and being blown out of the dehumidifier. Therefore, the noise caused by the impact of the high-speed wind and the air guide ribs on the mesh cover can be effectively reduced.

[0011] In an optional implementation, the number of the air guide ribs is n.

[0012] Through the above arrangement, the distance between the air guide ribs arranged in the preset direction and the preset plane gradually increases, which also reduces the force when the air guide ribs farthest from the air inlet come into contact with high-speed wind, thereby reducing the generation of noise.

[0013] In an optional embodiment, each air guide rib has a third end close to the centrifugal fan, the third end has a preset point, a plurality of preset points pass through a preset curve, and the curvature radius of the preset curve is R;

[0014] B.Q n and C 2u are all constants, with the axis of the centrifugal fan as the horizontal coordinate and the preset straight line as the vertical coordinate to form a coordinate system. The preset straight line is perpendicular to the axis and passes through the air outlet and the center of the centrifugal fan at the same time. is the position angle of the wind guide rib in the coordinate system.

[0015] Through the above arrangement, the distance between the multiple air guide ribs from the air guide rib closest to the air inlet to the nth air guide rib and the preset plane gradually increases, thereby reducing the impact of wind at higher wind speeds on the air guide ribs and achieving the effect of reducing noise.

[0016] In an optional embodiment, each wind guide rib has a fourth end opposite to the third end, a line connecting the middle of the third end and the middle of the fourth end is a wind guide line, the preset curve has a preset tangent at a preset point, and the wind guide line of each wind guide rib has a preset angle with the preset tangent at the corresponding preset point;

[0017] A plurality of air guide ribs are divided into a first group and a second group, and the first group is far away from the air inlet. A preset angle formed by an air guide line of the air guide ribs of the first group and a corresponding preset tangent is a first angle, and a preset angle formed by an air guide line of the air guide ribs of the second group and a corresponding preset tangent is a second angle. The direction of the first angle is opposite to that of the second angle and away from the air inlet, and the first angle and the second angle gradually increase in the direction approaching the air inlet.

[0018] Through the above arrangement, different air guide ribs have different preset angles β, which can expand the air outlet range of the air outlet, make the air flow smoother, and reduce the air volume loss.

[0019] In an optional implementation, the first angle has a value range of 60° to 70°, and the second angle has a value range of 80° to 110°.

[0020] Through the above arrangement, the first angle and the second angle are not too large, so that the air guide ribs can expand the range of the air outlet while also ensuring their own air guide function.

[0021] In an optional embodiment, multiple air guide ribs are divided into a first group and a second group and the second group is close to the air inlet, the air guide ribs in the first group are inclined away from the air inlet, and the air guide ribs in the second group are inclined toward the air inlet.

[0022] Through the above arrangement, the two groups of air guide ribs are inclined in opposite directions, so that the two groups of air guide ribs on the mesh cover are expanded, which can expand the air outlet angle of the air outlet and increase the air outlet range.

[0023] In an optional embodiment, in a preset direction, a plurality of air guide ribs are sequentially recorded as the 1st, 2nd... to nth air guide ribs, the minimum spacing between the 1st air guide rib and the shell in the axial direction of the centrifugal fan is L1, and in the preset direction, the spacings between adjacent air guide ribs are sequentially recorded as L2, L3,..., L n The minimum distance between the nth air guide rib and the shell in the axial direction of the centrifugal fan is L n+1 , L n <L n-1 <...<L3<...<L1=L n+1 .

[0024] Through the above arrangement, adjacent air guide ribs in the area with faster air outlet speed can be set with a smaller spacing to achieve airflow guidance, and adjacent air guide ribs in the area with lower air outlet speed can be set with a larger spacing to increase the flow area of ​​the airflow.

[0025] In an alternative embodiment,

[0026] Through the above arrangement, in a preset direction, the spacing between adjacent air guide ribs is regularly reduced, which can reduce the difficulty of making the mold.

[0027] In an optional embodiment, the plurality of air guide ribs are divided into a first group and a second group, and the second group is close to the air inlet, and the thickness of the air guide ribs of the first group is greater than the thickness of the air guide ribs of the second group.

[0028] Through the above arrangement, the strength of the wind guide ribs in the first group is enhanced.

[0029] In an optional embodiment, the thickness of the wind guide ribs in the first group is equal, the thickness of the wind guide ribs in the second group is equal, and the thickness of the wind guide ribs in the first group is twice the thickness of the wind guide ribs in the second group.

[0030] Through the above arrangement, the strength of the wind guide ribs in the first group is further ensured.

[0031] The beneficial effect of the embodiment of the present invention is as follows: a dehumidifier provided by the embodiment of the present invention includes a housing, a centrifugal fan and a mesh cover, the mesh cover is arranged at the air outlet, and the mesh cover is provided with a plurality of air guide ribs arranged along a preset direction, the preset direction is from the first end toward the second end, and the distance between the air guide ribs and the preset plane gradually increases from the air guide rib closest to the air inlet among the plurality of air guide ribs to the direction of the bottom n air guide ribs. The high-speed wind blown out from the centrifugal fan needs to travel a long distance before passing through the air guide ribs and blowing out of the dehumidifier, so the noise generated by the impact of the high-speed wind and the air guide ribs on the mesh cover can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0033] Figure 1 A schematic cross-sectional view of the assembled housing and mesh cover of a dehumidifier provided by an embodiment of the present invention;

[0034] Figure 2 A schematic diagram of a preset angle formed by an air guide line on an air guide rib in a dehumidifier provided by an embodiment of the present invention and a preset tangent line on a corresponding preset curve;

[0035] Figure 3 It is a structural schematic diagram of an existing dehumidifier;

[0036] Figure 4 for Figure 3 Schematic cross-section of .

[0037] Icons: 1-dehumidifier; 10-housing; 11-air inlet; 12-air outlet; 20-centrifugal fan; 21-first end; 22-second end; 30-mesh cover; 310-first group; 320-second group; 31-wind guide ribs; 311-third end; 312-fourth end; 313-wind guide line; 40-preset curve; 41-preset tangent; β-preset angle; a-preset direction. DETAILED DESCRIPTION

[0038] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0039] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0042] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The specific structure of a dehumidifier provided by an embodiment of the present invention and the corresponding technical effects it brings are described in detail below in conjunction with the patent drawings.

[0045] Please refer to Figure 1-Figure 2 A dehumidifier 1 provided in an embodiment of the present invention includes a housing 10 , a centrifugal fan 20 and a mesh cover 30 .

[0046] The shell 10 has an air inlet 11 and an air outlet 12. The centrifugal fan 20 is arranged in the shell 10. The centrifugal fan 20 is used to guide the gas entering the air inlet 11 to the air outlet 12. The centrifugal fan 20 has a first end 21 and a second end 22 that are arranged at intervals and opposite to each other along its own axial direction. The first end 21 is closer to the air inlet 11 than the second end 22.

[0047] The mesh cover 30 is arranged at the air outlet 12, and is provided with a plurality of air guide ribs 31 arranged along a preset direction a. The preset direction a is from the first end 21 toward the second end 22. From the air guide rib 31 closest to the air inlet 11 among the plurality of air guide ribs 31 to the direction of the bottom n air guide ribs 31, the distance between the air guide ribs 31 and the preset plane gradually increases. The preset plane is arranged opposite to the air outlet 12, and the axis of the centrifugal fan 20 falls into the preset plane. The number of the plurality of air guide ribs 31 is at least n.

[0048] In this embodiment, the air outlet 12 faces upward, and the preset plane is a horizontal plane. Of course, in some other optional embodiments, the air outlet 12 is not limited to facing upward, but can also face other directions.

[0049] Please refer to Figure 1-Figure 2 It should be noted that the above-mentioned preset plane is horizontal when the dehumidifier 1 is placed normally, that is, the dehumidifier 1 is placed horizontally. Figure 1 In the middle state, the preset plane is horizontal.

[0050] Under the action of the centrifugal fan 20, the gas will axially enter the impeller of the centrifugal fan 20. After entering the impeller, the gas becomes radial. Due to the characteristics of the centrifugal fan 20 itself, in the axial direction of the centrifugal fan 20, the wind speed blown out on the side close to the first end 21 is lower than the wind speed blown out near the second end 22.

[0051] It is understandable that when the wind speed is high, the noise generated by the wind guide ribs 31 is high. Therefore, in the present embodiment, the distance between the wind guide ribs 31 and the preset plane gradually increases from the wind guide ribs 31 closest to the air inlet 11 among the multiple wind guide ribs 31 to the direction of the bottom n wind guide ribs 31. In other words, the distance between the nth wind guide rib 31 and the preset plane is the largest. Therefore, from the wind guide ribs 31 closest to the air inlet 11 among the multiple wind guide ribs 31 to the direction of the bottom n wind guide ribs 31, the high-speed wind blown out of the centrifugal fan 20 needs to pass a long distance before passing through the wind guide ribs 31 and blowing out of the dehumidifier 1. Therefore, the noise of the faster wind impacting the wind guide ribs 31 on the mesh cover 30 can be effectively reduced, and the influence of the faster wind and the lower wind hitting the mesh cover 30 at the same time is avoided, further reducing the noise.

[0052] Some existing dehumidifiers such as Figure 3-Figure 4As shown, the distance between the air guide ribs 31 in the mesh cover 30 and the horizontal plane where the highest point of the centrifugal fan 20 is located remains unchanged. Therefore, the high-speed wind blown by the centrifugal fan 20 has a greater impact on the air guide ribs 31 in the mesh cover 30, so the noise generated is also greater.

[0053] In an optional embodiment, the number of the air guide ribs 31 is n, that is, in the preset direction a, the distances between the plurality of air guide ribs 31 and the preset plane gradually increase.

[0054] Of course, in some other optional embodiments, the number of the air guiding ribs 31 may also be n+1 or n+1.

[0055] Furthermore, each wind guiding rib 31 has a third end 311 close to the centrifugal fan 20 , and the third end 311 has a preset point. The plurality of preset points pass through a preset curve 40 , and the curvature radius of the preset curve 40 is R.

[0056] Among them, R2, B, Q n and C 2u are all constants, and a coordinate system is formed with the axis of the centrifugal fan 20 as the horizontal coordinate and a preset straight line as the vertical coordinate. The preset straight line is perpendicular to the axis and passes through the air outlet 12 and the center of the centrifugal fan 20 at the same time. is the position angle of the air guide rib 31 on the coordinate system. Specifically, R2 is the outer diameter of the impeller of the centrifugal fan 20, B is the volute width of the centrifugal fan 20, Q n is the flow rate of the centrifugal fan 20, C 2u is the velocity component of the airflow in the circumferential direction after leaving the impeller of the centrifugal fan 20. It can be understood that each By connecting the points, we can get the preset curve 40.

[0057] It should be noted that, through the above formula, a preset curve 40 in the shape of a volute can be obtained, and the multiple air guide ribs 31 on the mesh cover 30 are also arranged roughly in the shape of a volute. The distance between the multiple air guide ribs 31 and the preset plane is gradually increased from the air guide rib 31 closest to the air inlet 11 to the nth air guide rib 31 in the preset direction a, thereby reducing the impact of the wind with a higher wind speed on the air guide rib 31, and achieving the effect of reducing noise.

[0058] Furthermore, in this embodiment, the plurality of wind guide ribs 31 are divided into a first group 310 and a second group 320, wherein the second group 320 is close to the air inlet 11, the wind guide ribs 31 of the first group 310 are inclined in a direction away from the air inlet 11, and the wind guide ribs 31 of the second group 320 are inclined in a direction close to the air inlet 11.

[0059] It can be understood that by tilting the two groups of air guide ribs 31 in opposite directions, the two groups of air guide ribs 31 on the mesh cover 30 are expanded, which can expand the air outlet angle of the air outlet 12 and increase the air outlet range.

[0060] Optionally, each wind guide rib 31 has a fourth end 312 opposite to the third end 311, and a line connecting the middle of the third end 311 and the middle of the fourth end 312 is a wind guide line 313. The preset curve 40 has a preset tangent 41 at a preset point, and the wind guide line 313 of each wind guide rib 31 has a preset angle β with the preset tangent 41 at the corresponding preset point, where the preset angle is recorded as β.

[0061] The multiple air guide ribs 31 are divided into a first group 310 and a second group 320, and the first group 310 is far away from the air inlet 11, the angle formed by the air guide line 313 of the air guide ribs 31 of the first group 310 and the corresponding preset tangent 41 is the first angle, and the preset angle β formed by the air guide line 313 of the air guide ribs 31 of the second group 320 and the corresponding preset tangent 41 is the second angle, the direction of the first angle is opposite to the direction of the second angle and far away from the air inlet 11, and the first angle and the second angle gradually increase along the direction approaching the air inlet 11.

[0062] That is to say, different air guide ribs 31 have different preset angles β, which can expand the air outlet range of the air outlet 12, make the air flow smoother, and reduce the air volume loss.

[0063] The value range of the first angle is 60° to 70°, and the value range of the second angle is 80° to 110°.

[0064] It can be understood that, in the preset direction a, the closer to the second end 22 of the centrifugal fan 20, the greater the air outlet speed of the centrifugal fan 20. Therefore, adjacent air guide ribs 31 in the area with faster air outlet speed can be set with a smaller spacing to achieve the guidance of the airflow, and adjacent air guide ribs 31 in the area with lower air outlet speed can be set with a larger spacing to increase the circulation area of ​​the airflow.

[0065] Therefore, the distance between adjacent air guiding ribs 31 in the first group 310 is smaller than the distance between adjacent air guiding ribs 31 in the second group 320 .

[0066] Specifically, in the preset direction a, the plurality of air guide ribs 31 are sequentially recorded as the first, second, ... to nth air guide ribs 31, the first spacing between the first air guide rib 31 and the housing 10 in the axial direction of the centrifugal fan 20 is L1, and in the preset direction a, the spacings between adjacent air guide ribs 31 are sequentially recorded as L2, L3, ..., L n The minimum distance between the nth air guide rib 31 and the housing 10 in the axial direction of the centrifugal fan 20 is L n+1，Where L n <L n-1 <...>L3<...<L1=L n+1 .

[0067] Furthermore,

[0068] It can be seen from this that in the preset direction a, the spacing between adjacent air guide ribs 31 is reduced according to a regular assembly, which can reduce the difficulty of making the mold.

[0069] Further, in this embodiment, the thickness of the first group 310 of wind guide ribs 31 is less than the thickness of the second group 320 of wind guide ribs 31. It can be understood that in the area with low air velocity, the wind blown by the centrifugal fan 20 has a smaller impact on the wind guide ribs 31, so the wind guide ribs 31 at this location can be set to a smaller thickness without affecting the strength.

[0070] In the area with a higher air velocity, the airflow blown by the centrifugal fan 20 exerts a greater force on the air guide ribs 31 on the mesh cover 30 , and a larger thickness is set to enhance the strength of the mesh cover 30 .

[0071] Furthermore, the thickness dimensions of the wind guide ribs 31 in the first group 310 are equal, the thickness dimensions of the wind guide ribs 31 in the second group 320 are equal, and the thickness dimension of the wind guide ribs 31 in the first group 310 is twice the thickness dimension of the wind guide ribs 31 in the second group 320.

[0072] The thickness of the wind guiding ribs 31 in the first group 310 is recorded as H, and the thickness of the wind guiding ribs 31 in the second group 320 is recorded as h, where H=2h.

[0073] Of course, in some other embodiments, the thickness of the wind guide ribs 31 in the first group 310 and the thickness of the wind guide ribs 31 in the second group 320 may change sequentially. For example, in the preset direction a, the thickness of the wind guide ribs 31 may gradually increase.

[0074] It should be noted that, in this embodiment, the number of the air guiding ribs 31 is 8. And the number of the air guiding ribs 31 in the first group 310 is the same as the number of the air guiding ribs 31 in the second group 320.

[0075] It should be noted that the above n can be 8, or 7 or 6, etc., wherein the air inlet 11 is opposite to the first end 21 .

[0076] The dehumidifier 1 further includes structures such as a water tank, a condenser, and a compressor. The condenser and the compressor are both located in a housing 10, and the water tank is connected to the housing 10. The working principle of the dehumidifier 1 is as follows: the refrigerant is compressed by the compressor to form a high-temperature and high-pressure refrigerant that flows to the condenser. The high-temperature and high-pressure refrigerant is cooled on the condenser and becomes a low-temperature and high-pressure liquid. Then the refrigerant passes through the throttling device and becomes a low-temperature and low-pressure liquid. Then the refrigerant flows to the evaporator. The low-temperature and low-pressure liquid refrigerant exchanges heat with the air on the evaporator. The refrigerant absorbs heat to cause the air to condense. The condensed water flows into the water tank through a preset flow path, thereby dehumidifying the air. The refrigerant is converted from liquid to low-pressure gas and flows to the compressor again. The dehumidified air will be discharged through the air outlet 12 of the cover body under the action of the wind wheel. The fan can inhale external air from the air inlet 11, and under the action of the centrifugal fan 20, the wind is converted from the axial direction of the centrifugal fan 20 to the radial direction of the centrifugal fan 20, so that the wind passes through the air outlet 12 and is discharged from the mask of the dehumidifier 1.

[0077] In summary, a dehumidifier 1 provided in an embodiment of the present invention includes a housing 10, a centrifugal fan 20 and a mesh cover 30, the mesh cover 30 is arranged at the air outlet 12, and the mesh cover 30 is provided with a plurality of air guide ribs 31 arranged along a preset direction a, the preset direction a is from the first end 21 to the second end 22, and the distance between the air guide ribs 31 and the preset plane gradually increases from the air guide rib 31 closest to the air inlet 11 among the plurality of air guide ribs 31 to the direction of the bottom n air guide ribs 31. The high-speed wind blown out from the centrifugal fan 20 needs to pass a long distance to pass through the air guide ribs 31 and blow out of the dehumidifier 1, so the noise generated by the impact of the high-speed wind and the air guide ribs 31 on the mesh cover 30 can be effectively reduced.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A dehumidifier, characterized in that: include: A housing (10), wherein the housing (10) has an air inlet (11) and an air outlet (12); a centrifugal fan (20), the centrifugal fan (20) being arranged in the housing (10), the centrifugal fan (20) being used to guide the gas entering through the air inlet (11) to the air outlet (12), the centrifugal fan (20) having a first end (21) and a second end (22) arranged at intervals and opposite to each other along its own axis, the first end (21) being closer to the air inlet (11) than the second end (22); A mesh cover (30), wherein the mesh cover (30) is arranged at the air outlet (12), and the mesh cover (30) is provided with a plurality of air guide ribs (31) arranged along a preset direction (a), wherein the preset direction (a) is from the first end (21) toward the second end (22), and in a direction from the air guide rib (31) closest to the air inlet (11) among the plurality of air guide ribs (31) to the nth air guide rib (31), the distance between the air guide ribs (31) and a preset plane gradually increases, the preset plane is arranged opposite to the air outlet (12), the axis of the centrifugal fan (20) falls within the preset plane, and the number of the plurality of air guide ribs (31) is at least n.

2. The dehumidifier according to claim 1, characterized in that: The number of the wind guide ribs (31) is n.

3. The dehumidifier according to claim 1, characterized in that: Each of the air guide ribs (31) has a third end (311) close to the centrifugal fan (20), the third end (311) has a preset point, a plurality of the preset points pass through a preset curve (40), the curvature radius of the preset curve (40) is R, Among them, R2, B, Q n and C 2u are all constants, and a coordinate system is formed with the axis of the centrifugal fan (20) as the horizontal coordinate and a preset straight line as the vertical coordinate, wherein the preset straight line is perpendicular to the axis and passes through the center of the air outlet (12) and the centrifugal fan (20) at the same time. is the position angle of the wind guide rib (31) on the coordinate system.

4. The dehumidifier according to claim 3, characterized in that: Each of the wind guide ribs (31) has a fourth end (312) opposite to the third end (311); a line connecting the middle of the third end (311) and the middle of the fourth end (312) is a wind guide line (313); the preset curve (40) has a preset tangent (41) at the preset point; and the wind guide line (313) of each of the wind guide ribs (31) and the preset tangent (41) at the corresponding preset point have a preset angle (β); The plurality of wind guide ribs (31) are divided into a first group (310) and a second group (320), and the first group (310) is far away from the air inlet (11); a preset angle (β) formed by an air guide line (313) of the wind guide ribs (31) of the first group (310) and the corresponding preset tangent (41) is a first angle; a preset angle (β) formed by an air guide line (313) of the wind guide ribs (31) of the second group (320) and the corresponding preset tangent (41) is a second angle; a direction of the first angle is opposite to a direction of the second angle and is away from the air inlet (11); and the first angle and the second angle gradually increase in a direction approaching the air inlet (11).

5. The dehumidifier according to claim 4, characterized in that: The first angle has a value range of 60° to 70°, and the second angle has a value range of 80° to 110°.

6. The dehumidifier according to claim 1, characterized in that: The plurality of wind guide ribs (31) are divided into a first group (310) and a second group (320), and the second group (320) is close to the air inlet (11); the wind guide ribs (31) in the first group (310) are inclined in a direction away from the air inlet (11), and the wind guide ribs (31) in the second group (320) are inclined in a direction close to the air inlet (11).

7. The dehumidifier according to claim 1, characterized in that: In the preset direction (a), the plurality of wind guide ribs (31) are sequentially recorded as the first, second, ... to nth wind guide ribs (31), the minimum spacing between the first wind guide rib (31) and the housing (10) in the axial direction of the centrifugal fan (20) is L1, and in the preset direction (a), the spacings between adjacent wind guide ribs (31) are sequentially recorded as L2, L3, ..., L n The minimum distance between the nth air guide rib (31) and the housing (10) in the axial direction of the centrifugal fan (20) is L. n+1 , the L n <L n-1 <...<L3<...<L1=L n+1 .

8. The dehumidifier according to claim 7, characterized in that:

9. The dehumidifier according to claim 1, characterized in that : The plurality of air guide ribs (31) are divided into a first group (310) and a second group (320), and the second group (320) is close to the air inlet (11), and the thickness of the air guide ribs (31) of the first group (310) is greater than the thickness of the air guide ribs (31) of the second group (320).

10. The dehumidifier according to claim 9, characterized in that: The thickness dimensions of the wind guide ribs (31) in the first group (310) are equal, the thickness dimensions of the wind guide ribs (31) in the second group (320) are equal, and the thickness dimension of the wind guide ribs (31) in the first group (310) is twice the thickness dimension of the wind guide ribs (31) in the second group (320).

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