A cross-flow air duct and an air outlet device

Abstract

The present invention relates to the technical field of fans, and particularly relates to a cross-flow air duct and an air outlet device. An air outlet and an air inlet are formed between a first body and a second body. By dividing the air outlet into a first air outlet opening and a plurality of second air outlet openings that are axially spaced and staggered along the volute, multiple groups of air outlet areas in different directions are formed. It can be defined that the side where the volute is located is the left side, and the side where the volute tongue is located is the right side. Then, the left side where the first air outlet opening is located is to the left relative to the left side of the second air outlet opening, and the right side of the second air outlet opening is to the right relative to the right side of the first air outlet opening. Therefore, the overall air outlet width is enlarged and the air supply range is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of fans, and particularly to a cross-flow air duct and an air outlet device. Background Art

[0002] With the improvement of living standards, people's demand for the functions and performance diversity of fans has also increased, and they prefer fans that can bring a comfortable experience. Currently, the tower fans on the market have a slender appearance, occupy a small area, have no exposed blades, and have a higher safety factor; their multi-blade cross-flow impellers are combined with long-stroke air ducts, with uniform up-and-down air cutting and good air supply continuity. However, limited by the tower shape and the small diameter of the impeller, the corresponding air outlet is relatively narrow, and most of the cross-flow air duct volutes adopt the design of Archimedes spiral or logarithmic spiral. The fluid is sent out along the tangential direction formed by the spiral, and the air pressure at the position close to the volute shape line is higher than that at the position far from the volute, resulting in a difference in the air velocity at the position of the air outlet close to the volute and that far from the volute, that is, the air velocities on the left and right sides of the air outlet are uneven, and due to the limited air outlet area and narrow air supply range, the uniformity of the user's body surface temperature is poor. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the air supply range of the cross-flow air duct in the prior art is relatively narrow, so as to provide a cross-flow air duct and an air outlet device that can improve the air supply range.

[0004] This embodiment provides a cross-flow air duct, including: a volute, the volute includes a first body, the first side of the first body is the air inlet side, and the second side of the first body is the air outlet side; a scroll tongue, arranged at an interval with the volute, the scroll tongue includes a second body, the first side of the second body is the air inlet side, and the second side of the second body is the air outlet side. An installation space suitable for installing an impeller is formed between the first body and the second body. An air inlet is formed between the first side of the first body and the first side of the second body, and an air outlet is formed between the second side of the first body and the second side of the second body; the air outlet includes a plurality of first air outlet openings and a plurality of second air outlet openings, and the first air outlet openings and the second air outlet openings are arranged at intervals and staggered along the axial direction of the volute.

[0005] A plurality of first air guide plates are arranged on the second side of the first body at intervals along the axial direction of the volute, and the first air outlet openings are formed between the first air guide plates and the second body;

[0006] A plurality of second air guide plates are arranged on the second side of the second body at intervals along the axial direction of the volute, and the second air outlet openings are formed between the second air guide plates and the first body. The first air guide plates and the second air guide plates are staggered in the axial direction of the volute.

[0007] The first wind guide plate includes a first plate body and a first wind guide surface provided at an end of the first plate body and extending toward the outside of the installation space, and a second wind guide surface is further provided on a second side of the first plate body, and the second wind guide surface extends toward the outside of the installation space;

[0008] The second wind guide plate includes a second plate body and a third wind guide surface arranged at the end of the second plate body and extending toward the outside of the installation space. A fourth wind guide surface is also arranged on the second side of the second plate body, and the fourth wind guide surface extends toward the outside of the installation space.

[0009] The central symmetric plane between the first wind guide surface and the second wind guide surface is defined as a first plane, the central symmetric plane between the third wind guide surface and the fourth wind guide surface is defined as a second plane, and the angle between the first plane and the second plane is θ, 0<θ≤40°.

[0010] The central symmetry plane between the second side of the first body and the second side of the second body is defined as a misalignment reference plane, the first surface and the second surface are located on both sides of the misalignment reference plane, the angle between the first surface and the misalignment reference plane is θ1, the angle between the second surface and the misalignment reference plane is θ2, 0<θ1≤20°, and / or, 0<θ2≤20°.

[0011] A plurality of third air guide plates are provided on the first side of the first body and are spaced apart from each other along the axial direction of the volute.

[0012] An air inlet guide surface is disposed on the first side of the second body.

[0013] The cross-flow air duct also includes: an air outlet grille, which is arranged at the air outlet, and the air outlet grille includes a first grille segment and a second grille segment which are staggered along the axial direction of the volute, and the first grille segment and the second grille segment are respectively provided with a plurality of them, the first grille segment is correspondingly arranged on the first air outlet opening, the second grille segment is correspondingly arranged on the second air outlet opening, and the longitudinal central symmetry plane of the first grille segment is close to the second side of the first body, and the longitudinal central symmetry plane of the second grille segment is close to the second side of the second body.

[0014] The longitudinal central symmetry plane of the first grille segment is defined as a first central symmetry plane, the longitudinal central symmetry plane of the second grille segment is defined as a second central symmetry plane, and the included angle between the first central symmetry plane and the second central symmetry plane is β, 0<β≤50°.

[0015] Define the central symmetry plane of the second side of the first body and the second side of the second body as the misalignment reference plane. The angle between the first central symmetry plane and the misalignment reference plane is β1, and the angle between the second central symmetry plane and the misalignment reference plane is β2, where 0 < β1 ≤ 25°, and / or 0 < β2 ≤ 25°.

[0016] The cross-flow air duct further includes a wind wheel disposed in the installation space, and the diameter of the wind wheel is D.

[0017] The cross-section of the second body is circular arc, and the axis of the second body is collinear with the axis of the wind wheel.

[0018] The minimum radial distance between the second body and the wind wheel is A, where 1D / 28 ≤ A ≤ 1D / 10.

[0019] The position where the distance between the first body and the wind wheel is the smallest is the volute throat, and the distance between the volute throat and the wind wheel is B, where 1D / 22 ≤ B ≤ 1D / 11.

[0020] The length of the first grille section and / or the second grille section is C, where 1D / 9 ≤ C ≤ 1D / 4.

[0021] The radial distance between the air outlet grille and the wind wheel is F, where 1D / 6 ≤ F ≤ 1D / 3.

[0022] The wind wheel includes multiple wind wheel sections. The distance between two adjacent first air guide plates, or two adjacent second air guide plates, or two adjacent first grille sections, or two adjacent second grille sections is the length of N wind wheel sections, where 1 ≤ N ≤ 3.

[0023] This embodiment further provides an air outlet device, including the above-mentioned cross-flow air duct.

[0024] The technical solution of the present invention has the following advantages:

[0025] For the cross-flow air duct provided by the present invention, an air outlet and an air inlet are formed between the first body and the second body. By dividing the air outlet into a first air outlet opening and several second air outlet openings that are axially spaced and staggered along the volute, multiple groups of air outlet areas in different directions are formed. It can be defined that the side where the volute is located is the left side, and the side where the volute tongue is located is the right side. Then the left side where the first air outlet opening is located is offset to the left relative to the left side of the second air outlet opening, and the right side of the second air outlet opening is offset to the right relative to the right side of the first air outlet opening. Therefore, the overall air outlet width is expanded, and the air supply range is improved. Description of the Drawings

[0026] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Structural schematic diagram of the cross-flow air duct provided in Embodiment 1 of the present invention;

[0028] Figure 2 For Figure 1 Structural schematic diagram of the medium wind wheel;

[0029] Figure 3 For Figure 1 Top view of

[0030] Figure 4 For Figure 1 Structural schematic diagram of the cross-flow air duct in without an air outlet grille;

[0031] Figure 5 For Figure 4 Structural schematic diagram at the air inlet side of ;

[0032] Figure 6 For Figure 5 Structural schematic diagram of the cross-flow air duct in without a wind wheel;

[0033] Figure 7 Structural schematic diagram of the volute;

[0034] Figure 8 Structural schematic diagram at one angle of the volute tongue;

[0035] Figure 9 Structural schematic diagram at another angle of the volute tongue;

[0036] Figure 10 For Figure 4 Top view of

[0037] Explanation of reference numerals:

[0038] 1. Volute; 101. First body; 102. First air guide plate; 1021. First plate body; 1022. First air guide surface; 103. Second air guide surface; 104. Third air guide plate; 105. Volute throat; 2. Volute tongue; 201. Second body; 202. Second air guide plate; 2021. Second plate body; 2022. Third air guide surface; 203. Fourth air guide surface; 204. Inlet air guide surface; 3. Impeller; 301. Impeller section; 4. Air outlet grille; 401. First grille section; 4011. First central symmetry plane; 402. Second grille section; 4021. Second central symmetry plane; 5. Misalignment reference plane; 6. First surface; 7. Second surface. Detailed implementation manners

[0039] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some but not all of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0040] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0041] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installed", "connected", "connected" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0042] In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0043] Embodiment 1

[0044] With the improvement of living standards, people's demand for the functions and performance diversity of fans has also increased, and they prefer fans that can bring a comfortable experience. Currently, the tower fans on the market have a slender appearance, occupy a small area, have no exposed blades, and have a higher safety factor; their multi-blade cross-flow impellers are combined with a long-stroke air duct, with uniform up and down air cutting and good air supply continuity. However, limited by the tower shape and the relatively small diameter of the impeller, the corresponding air outlet is relatively narrow, and most of the scroll casings of the cross-flow air ducts are designed with Archimedean spirals or logarithmic spirals. The fluid is sent out along the tangential direction formed by the spiral, and the air pressure at the position close to the spiral line of the scroll casing is higher than that at the position far from the scroll casing, resulting in a difference in the air velocity between the position of the air outlet close to the scroll casing and the position far from the scroll casing, that is, the air velocities on the left and right sides of the air outlet are uneven. Moreover, due to the limited air outlet area and narrow air supply range, the uniformity of the body surface temperature of users is relatively poor.

[0045] Therefore, as Figures 1 to 10 shown, this embodiment provides a cross-flow air duct that can improve the air supply range.

[0046] In one embodiment, the cross-flow air duct includes a scroll casing 1 and a scroll tongue 2. The scroll casing 1 includes a first body 101. The first side of the first body 101 is the air inlet side, and the second side of the first body 101 is the air outlet side; the scroll tongue 2 is arranged at an interval from the scroll casing 1. The scroll tongue 2 includes a second body 201. The first side of the second body 201 is the air inlet side, and the second side of the second body 201 is the air outlet side. An installation space suitable for installing an impeller 3 is formed between the first body 101 and the second body 201. An air inlet is formed between the first side of the first body 101 and the first side of the second body 201, and an air outlet is formed between the second side of the first body 101 and the second side of the second body 201. The air outlet includes a plurality of first air outlet openings and a plurality of second air outlet openings, and the first air outlet openings and the second air outlet openings are arranged at intervals and staggered along the axial direction of the scroll casing.

[0047] An air outlet and an air inlet are formed between the first body 101 and the second body 201. By dividing the air outlet into a first air outlet opening and a plurality of second air outlet openings that are axially spaced and staggered along the volute 1, multiple air outlet areas in different directions are formed. A plurality of first air guiding plates 102 are provided on the second side of the first body 101 and are axially spaced along the volute 1. The first air guiding plate 102 and the second body form the first air outlet opening therebetween. A plurality of second air guiding plates 202 are provided on the second side of the second body 201 and are axially spaced along the volute 1. The second air guiding plate 202 and the first body 101 form the second air outlet opening therebetween; the first air guiding plate 102 and the second air guiding plate 202 are axially staggered on the volute 1. It can be defined that the side where the volute 1 is located is the left side, and the side where the volute tongue 2 is located is the right side. Then the left side where the first air outlet opening is located is to the left of the left side of the second air outlet opening, and the right side of the second air outlet opening is to the right of the right side of the first air outlet opening. Therefore, the air outlet width is overall enlarged and the air supply range is improved.

[0048] On the basis of the above embodiment, in a preferred embodiment, the first air guiding plate 102 includes a first plate body 1021 and a first air guiding surface 1022 provided at the end of the first plate body 1021 and extending toward the outside of the installation space. A second air guiding surface 103 is further provided on the second side of the first plate body 1021, and the second air guiding surface 103 extends toward the outside of the installation space; the second air guiding plate 202 includes a second plate body 2021 and a third air guiding surface 2022 provided at the end of the second plate body 2021 and extending toward the outside of the installation space. A fourth air guiding surface 203 is further provided on the second side of the second plate body 2021, and the fourth air guiding surface 203 extends toward the outside of the installation space. In this embodiment, the settings of the first air guiding surface 1022, the second air guiding surface 103, the third air guiding surface 2022, and the fourth air guiding surface 203 can guide the air outlet direction to ensure that the air blows toward the outside and avoid air flow disorder at the air outlet. In an alternative embodiment, the end surfaces of the first plate body 1021, the end surface of the second plate body 2021, the second side of the first body 101, and the second side of the second body 2021 can be respectively provided with guiding inclined surfaces to guide the air outlet direction through the guiding inclined surfaces.

[0049] Specifically, in an embodiment, the first air guiding surface 1022, the second air guiding surface 103, the third air guiding surface 2022, and the fourth air guiding surface 203 can respectively extend radially outward along the wind wheel 3.

[0050] On the basis of the above-mentioned embodiments, in a preferred embodiment, the central symmetric plane of the first air guide surface 1022 and the second air guide surface 103 is defined as the first surface 6, and the central symmetric plane of the third air guide surface 2022 and the fourth air guide surface 203 is defined as the second surface 7. The angle between the first surface 6 and the second surface 7 is θ, 0<θ≤40°. In this embodiment, the angle between the first surface 6 and the second surface 7 is also the misalignment angle between the first air outlet area and the second air outlet area. By limiting the misalignment angle between the first air outlet area and the second air outlet area, this embodiment can avoid the uneven distribution of air flow velocity and pressure inside the cross-flow air duct due to excessive misalignment angle. This uneven airflow acts on the volute tongue 2, the volute 1 and the wind wheel 3, which will form a pulsation of air flow pressure over time. The air flow pulsation caused by the rotation of the wind blades of the wind wheel 3 will continuously and periodically impact the volute tongue 2, the volute 1 and other air duct bodies, increasing the peak value of the rotation noise. The greater the unevenness of the airflow, the stronger the noise will be. When the misalignment is too large. This will destroy the continuity of the flow inside the wind wheel 3 and produce a noticeable left-right deviation, affecting the air volume and air supply effect of the air duct. Therefore, this embodiment can expand the air outlet width and improve the air supply range by limiting the offset angle between the first air outlet area and the second air outlet area, while not increasing noise and affecting the air volume of the air duct.

[0051] In a specific embodiment, θ is 40°. In some alternative embodiments, θ is 20° or 30°.

[0052] On the basis of the above-mentioned embodiments, in a preferred embodiment, the central symmetric plane between the second side of the first body 101 and the second side of the second body 201 is defined as the offset reference plane 5, the first surface 6 and the second surface 7 are located on both sides of the offset reference plane 5, the angle between the first surface 6 and the offset reference plane 5 is θ1, and the angle between the second surface 7 and the offset reference plane 5 is θ2, 0<θ1≤20°, 0<θ2≤20°. As a convertible embodiment, 0<θ1≤20°, θ2 is greater than 20°, or, θ1 is greater than 20°, 0<θ2≤20°. Due to the spiral arrangement of the chord line of the volute 1 of the crossflow air duct, the fluid at the outlet is ejected along the tangent line of the original chord line of the volute 1, so the wind speed at the direction of the back plate of the volute 1 near the extended section of the spiral line will be higher than that at the far volute 1. If the offset angle of the first air outlet area and the second air outlet area is too large, the wind pressure gradient of the adjacent segment air duct will increase, thereby making the wind speed of the adjacent first air outlet area and the second air outlet area uneven, and the noise and sound quality will also be affected. Therefore, this embodiment limits the angle between the first surface 6 and the offset reference plane 5, and the angle between the second surface 7 and the offset reference plane 5, that is, the angle between the center of the first air outlet area and the offset reference plane 5, and the angle between the center of the second air outlet area and the offset reference plane 5. This can avoid uneven wind speeds in adjacent first and second air outlet areas without increasing noise and ensuring sound quality.

[0053] On the basis of the above-described embodiments, in a preferred embodiment, a plurality of third air guide plates 104 are provided on the first side of the first body 101 and are spaced apart along the axial direction of the volute 1. In this embodiment, the provision of the third air guide plates 104 can ensure the stability of the cross-flow air duct.

[0054] On the basis of the above-described embodiments, in a preferred embodiment, an air inlet air guide surface 204 is provided on the first side of the second body 201. In this embodiment, the air inlet air guide surface 204 and the volute 1 cooperate together to smoothly introduce the outside air into the cross-flow air duct. The air inlet air guide surface 204 is an inclined surface extending in the radial direction of the impeller 3.

[0055] The cross-flow air duct further includes an air outlet grille 4. The air outlet grille 4 is provided at the air outlet, and the air outlet grille 4 includes a first grille section 401 and a second grille section 402 that are staggered along the axial direction of the volute 1. A plurality of the first grille sections 401 and the second grille sections 402 are respectively provided, and the longitudinal central symmetry plane of the first grille section 401 is close to the second side of the first body 101, and the longitudinal central symmetry plane of the second grille section 402 is close to the second side of the second body 201. It should be noted that the longitudinal central symmetry plane is coplanar with the axis of the impeller 3.

[0056] In this embodiment, by staggering the first grille section 401 and the second grille section 402, and the longitudinal central symmetry plane of the first grille section 401 is close to the second side of the first body 101, and the longitudinal central symmetry plane of the second grille section 402 is close to the second side of the second body 201, the first grille section 401 is correspondingly provided on the first air outlet opening, and the second grille section 402 is correspondingly provided on the second air outlet opening. The second side of the first body 101 is on the left, and the second side of the second body 201 is on the right. Therefore, the problem of the relatively narrow air supply range of the existing cross-flow air duct can be effectively improved. While ensuring the linearity of the up-and-down air cutting of the cross-flow air duct of the tower fan, air supply in a wider range can be achieved, thereby improving the overall wind feeling of the machine and enhancing the user's comfort experience.

[0057] On the basis of the above embodiments, in a preferred embodiment, the longitudinal central symmetry plane of the first grille section 401 is defined as the first central symmetry plane 4011, the longitudinal central symmetry plane of the second grille section 402 is defined as the second central symmetry plane 4021, and the included angle between the first central symmetry plane 4011 and the second central symmetry plane 4021 is β, where 0 < β ≤ 50°. The included angle between the first central symmetry plane 4011 and the second central symmetry plane 4021 is the misalignment angle of the first grille section 401 and the second grille section 402. If the misalignment angle of the first grille section 401 and the second grille section 402 is too large, it will cause abnormalities in noise and air volume. Therefore, this embodiment limits the misalignment angle of the first grille section 401 and the second grille section 402, which can ensure that the noise will not increase and the air volume will be ensured on the premise of ensuring the air supply range.

[0058] On the basis of the above embodiments, in a preferred embodiment, the central symmetry plane of the second side of the first body 101 and the second side of the second body 201 is defined as the misalignment reference plane 5, the included angle between the first central symmetry plane 4011 and the misalignment reference plane 5 is β1, and the included angle between the second central symmetry plane 4021 and the misalignment reference plane 5 is β2, where 0 < β1 ≤ 25° and 0 < β2 ≤ 25°. As a transformable embodiment, 0 < β1 ≤ 25° and β2 > 25°, or 0 < β2 ≤ 25° and β1 > 25°. In this embodiment, the included angle between the first central symmetry plane 4011 and the misalignment reference plane 5 is the angle by which the first grille section 401 deflects to the left, and the included angle between the second central symmetry plane 4021 and the misalignment reference plane 5 is the angle by which the second grille section 402 deflects to the right. This embodiment further limits the deflection angles of the first grille section 401 and the second grille section 402, which can ensure that the noise will not increase and the air volume will be ensured on the premise of ensuring the air supply range.

[0059] On the basis of the above embodiments, in a preferred embodiment, the length of the first grille section 401 and / or the second grille section 402 is C, where 1D / 9 ≤ C ≤ 1D / 4. If the lengths of the first grille section 401 and the second grille section 402 are too short, their air guiding effect will be weakened, and at the same time, the outlet air pressure will be insufficient and the wind speed will decrease, affecting the air supply effect of the air duct; while if the lengths of the first grille section 401 and the second grille section 402 are too long, the dynamic and static interference between the grille and the air supply fluid will increase, resulting in an increase in the noise peak value. Therefore, this embodiment limits the lengths of the first grille section 401 and the second grille section 402, which can ensure the air supply effect without increasing the noise. It should be noted that the lengths of the first grille section 401 and the second grille section 402 are the lengths along the air outlet direction.

[0060] In one embodiment, the lengths of the first grille segments 401 and the second grille segments 402 are equal. In other alternative embodiments, the lengths of the first grille segments 401 and the second grille segments 402 are not equal.

[0061] On the basis of the above embodiments, in a preferred embodiment, the crossflow air duct further comprises a wind wheel 3 arranged in the installation space, and the diameter of the wind wheel 3 is D. In this embodiment, the volute 1, the volute tongue 2, the wind wheel 3, and the air outlet grille 4 together form the crossflow air duct.

[0062] Based on the above embodiments, in a preferred embodiment, the cross section of the second body 201 is an arc, and the axis of the second body 201 is collinear with the axis of the wind wheel 3. In this embodiment, the volute tongue 2 can better guide the airflow and play the role of a diverter cone.

[0063] On the basis of the above-mentioned embodiments, in a preferred embodiment, the minimum radial distance between the second body 201 and the wind wheel 3 is A, 1D / 28≤A≤1D / 10. The radial distance between the second body 201 and the wind wheel 3 is the gap between the volute tongue 2 and the wind wheel 3. The ratio of the gap between the volute tongue 2 and the wind wheel 3 to the diameter of the wind wheel 3 has a significant effect on the flow rate and efficiency, and has a certain effect on the crossflow duct pressure. When the gap is large, the fan pressure decreases and the flow rate decreases. When the gap decreases, the pressure increases and the flow rate increases, but the noise peak and sound quality will also deteriorate, and it will affect the subsequent crossflow duct conversion and the safety regulations of the wind wheel 3. Therefore, this embodiment limits the minimum radial distance between the second body 201 and the wind wheel 3, which can ensure a certain pressure and flow without increasing noise and affecting the sound quality.

[0064] On the basis of the above-mentioned embodiments, in a preferred embodiment, the position where the distance between the first body 101 and the wind wheel 3 is the smallest is the snail throat 105, and the distance between the snail throat 105 and the wind wheel 3 is B, 1D / 22≤B≤1D / 11. The increase in the distance between the wind wheel 3 and the volute 1 will lead to a decrease in the air volume, and will cause the eddy flow area on the first side of the volute 1 to gradually increase, and the guide turbulent noise will increase. If the distance between the snail throat 105 and the wind wheel 3 is too small, the unevenness of the air flow speed and pressure inside the wind wheel 3 will increase, and the pulsation force of the area around the volute 1 will increase the rotation noise. Therefore, this embodiment limits the distance between the snail throat 105 and the wind wheel 3, which can ensure the uniformity of the wind speed and pressure inside the wind wheel 3 and reduce noise.

[0065] On the basis of the above embodiments, in a preferred embodiment, the radial distance between the air outlet grille 4 and the wind wheel 3 is F, where 1D / 6 ≤ F ≤ 1D / 3. If the distance between the air outlet grille 4 and the wind wheel 3 is too small, it will increase the pressure pulsation at the air duct outlet, thereby increasing the broadband noise in the flow field. In addition, too small an outlet gap will cause uneven fluid transition in the flow field, resulting in air volume loss and a decrease in the outlet air velocity. Therefore, this embodiment limits the radial distance between the air outlet grille 4 and the wind wheel 3, which can prevent excessive noise at the air duct outlet, reduce air volume loss, and ensure the magnitude of the outlet air velocity.

[0066] On the basis of the above embodiments, in a preferred embodiment, the wind wheel 3 includes multiple wind wheel segments 301, and the distance between two adjacent first grille segments 401, or two adjacent second grille segments 402, two adjacent first air guide plates 102, or two adjacent second air guide plates 202 is the length of N wind wheel segments 301, where 1 ≤ N ≤ 3.

[0067] The distance between two adjacent first grille segments 401 is the height of the second grille segment 402, and the distance between two adjacent second grille segments 402 is the height of the first grille segment 401. This embodiment limits the height of the first grille segment 401 and the height of the second grille segment 402, that is, it limits the grille discrete misalignment frequency. Due to the action of the volute 1 and the volute tongue 2, vortices will be formed inside the flow field of the wind wheel 3 in the cross-flow air duct. When the vortex deviates from the center of the impeller rotation axis, cross-flow is generated; if the heights of the first grille segment 401 and the second grille segment 402 are too low, the discrete frequency of the flow field at the outlet will increase, affecting the internal air pressure of the air duct, making the position of the single-segment eccentric vortex unstable, and unable to form a stable cross-flow area inside the impeller. The flow field between adjacent segments is disordered, which will have a great impact on the overall machine noise, sound quality, outlet air velocity and flow rate; if the heights of the first grille segment 401 and the second grille segment 402 are too large, the misalignment amplitude of the flow field will increase, resulting in the inability of the air ducts of adjacent segments to converge at a relatively long distance, generating an obvious left-right deviation wind feeling and affecting the user experience. Therefore, this embodiment limits the height of the first grille segment 401 and the height of the second grille segment 402, which can ensure the formation of a stable cross-flow area inside the impeller, without affecting the overall machine noise, sound quality, outlet air velocity and flow rate, and the left and right air velocities are uniform.

[0068] Embodiment 2

[0069] This embodiment provides an air outlet device, specifically a fan structure, which can also be other air outlet devices such as an air conditioner or a cooling fan, and includes the cross-flow air duct provided in the above embodiment.

[0070] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. A cross-flow air duct, characterized in that, Comprising: A volute (1), the volute (1) includes a first body (101), the first side of the first body (101) is the air inlet side, and the second side of the first body (101) is the air outlet side; A volute tongue (2), arranged at an interval from the volute (1), the volute tongue (2) includes a second body (201), the first side of the second body (201) is the air inlet side, the second side of the second body (201) is the air outlet side, an installation space suitable for installing a wind wheel (3) is formed between the first body (101) and the second body (201), an air inlet is formed between the first side of the first body (101) and the first side of the second body (201), an air outlet is formed between the second side of the first body (101) and the second side of the second body (201), and a guiding inclined surface is arranged on the second side of the first body (101); The air outlet includes a plurality of first air outlet openings and a plurality of second air outlet openings, and the first air outlet openings and the second air outlet openings are arranged at intervals and staggered along the axial direction of the volute (1); A plurality of first air guiding plates (102) are arranged on the second side of the first body (101) at intervals along the axial direction of the volute (1), and the first air guiding plates (102) and the second body (201) form the first air outlet openings therebetween; A plurality of second air guiding plates (202) are arranged on the second side of the second body (201) at intervals along the axial direction of the volute (1), and the second air guiding plates (202) and the first body (101) form the second air outlet openings therebetween, and the first air guiding plates (102) and the second air guiding plates (202) are staggered in the axial direction of the volute (1).

2. The cross-flow air duct according to claim 1, wherein The first air guiding plate (102) includes a first plate body (1021) and a first air guiding surface (1022) arranged at the end of the first plate body (1021) and extending towards the outside of the installation space, and a second air guiding surface (103) is further arranged on the second side of the first plate body (1021), and the second air guiding surface (103) extends towards the outside of the installation space; The second air guiding plate (202) includes a second plate body (2021) and a third air guiding surface (2022) arranged at the end of the second plate body (2021) and extending towards the outside of the installation space, and a fourth air guiding surface (203) is further arranged on the second side of the second plate body (2021), and the fourth air guiding surface (203) extends towards the outside of the installation space.

3. The cross-flow air duct according to claim 2, characterized in that, Define the central symmetry plane of the first air guiding surface (1022) and the second air guiding surface (103) as the first plane (6), define the central symmetry plane of the third air guiding surface (2022) and the fourth air guiding surface (203) as the second plane (7), and the included angle between the first plane (6) and the second plane (7) is θ, 0 < θ ≤ 40°.

4. The cross-flow air duct according to claim 3, characterized in that, A central symmetric plane between the second side of the first body (101) and the second side of the second body (201) is defined as a misaligned reference plane (5); the first surface (6) and the second surface (7) are located on both sides of the misaligned reference plane (5); an angle between the first surface (6) and the misaligned reference plane (5) is θ1; an angle between the second surface (7) and the misaligned reference plane (5) is θ2; 0<θ1≤20°, and / or 0<θ2≤20°.

5. The cross-flow air duct according to claim 1, wherein, A first side of the first body (101) is provided with a plurality of third air guide plates (104) distributed at intervals along the axial direction of the volute (1).

6. The cross-flow air duct according to claim 1, characterized in that, The first side of the second body (201) is provided with an air inlet guide surface (204).

7. The cross-flow air duct according to any one of claims 1-6, characterized in that, Also includes: An air outlet grille (4) is arranged at the air outlet, and the air outlet grille (4) comprises a first grille segment (401) and a second grille segment (402) which are staggered along the axial direction of the volute (1), and a plurality of the first grille segments (401) and the second grille segments (402) are provided respectively, the first grille segment (401) is correspondingly arranged on the first air outlet opening, and the second grille segment (402) is correspondingly arranged on the second air outlet opening, and the longitudinal central symmetry plane of the first grille segment (401) is close to the second side of the first body (101), and the longitudinal central symmetry plane of the second grille segment (402) is close to the second side of the second body (201).

8. The cross-flow air duct according to claim 7, characterized in that, The longitudinal central symmetry plane of the first grille segment (401) is defined as a first central symmetry plane (4011), the longitudinal central symmetry plane of the second grille segment (402) is defined as a second central symmetry plane (4021), and the angle between the first central symmetry plane (4011) and the second central symmetry plane (4021) is β, 0<β≤50°.

9. The cross-flow air duct according to claim 8, wherein, The central symmetric plane between the second side of the first body (101) and the second side of the second body (201) is defined as a misaligned reference plane (5), the angle between the first central symmetric plane (4011) and the misaligned reference plane (5) is β1, the angle between the second central symmetric plane (4021) and the misaligned reference plane (5) is β2, 0<β1≤25°, and / or, 0<β2≤25°.

10. The cross-flow air duct according to any one of claims 1-6, 8-9, characterized in that, The crossflow air duct further comprises a wind wheel (3) arranged in the installation space, and the diameter of the wind wheel (3) is D.

11. The cross-flow air duct according to claim 10, wherein, The cross section of the second body (201) 4 is an arc, and the axis of the second body (201) is colinear with the axis of the wind wheel (3).

12. The cross-flow air duct according to claim 11, wherein The minimum radial distance between the second body (201) and the wind wheel (3) is A, and 1D / 28≤A≤1D / 10.

13. The cross-flow air duct according to claim 10, characterized in that, The position where the distance between the first body (101) and the wind wheel (3) is the smallest is the snail throat (105), and the distance between the snail throat (105) and the wind wheel (3) is B, 1D / 22≤B≤1D / 11.

14. The cross-flow air duct according to claim 10, wherein The length of the first grid segment (401) and / or the second grid segment (402) is C, and 1D / 9≤C≤1D / 4.

15. The cross-flow air duct according to claim 10, characterized in that, The radial distance between the air outlet grille (4) and the wind wheel (3) is F, where 1D / 6 ≤ F ≤ 1D / 3.

16. The cross-flow air duct according to claim 10, characterized in that, The wind wheel (3) includes multiple wind wheel segments (301). The distance between two adjacent first air guiding plates (102), or two adjacent second air guiding plates (202), or two adjacent first grille segments (401), or two adjacent second grille segments (402) is the length of N wind wheel segments (301), where 1 ≤ N ≤ 3.

17. An air outlet device, characterized in that, It includes the cross-flow air duct according to any one of claims 1-16.

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