Air duct device and clothes dryer

Abstract

The present application relates to an air duct device (100) and a clothes dryer. The air duct device (100) comprises at least two air duct assemblies; each air duct assembly comprises an air duct shell (11, 13) and a centrifugal blower wheel (31, 33); an air outlet (111, 131) is formed in the air duct shell (11, 13); and the centrifugal blower wheel (31, 33) is arranged in the air duct shell (11, 13) and is configured to form a supply airflow flowing to the air outlet (111, 131).

Description

Duct devices and clothes dryers

[0001] Related applications

[0002] This application claims priority to Chinese patent application number 2023116930531, filed on December 11, 2023, entitled “Air Duct Device and Dryer,” the entire text of which is incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of clothes drying equipment, and in particular to an air duct device and a clothes dryer. Background Art

[0004] As the current economic level continues to improve, users have an increasingly higher demand for efficient, high-quality and healthy living. Dryers are receiving increasing attention because they can shorten the drying time and reduce the impact of weather, especially humid weather, on drying clothes.

[0005] In the current market-related technologies, the dryer is equipped with an air outlet in the center or on one side. During its operation, it supplies hot air through the air outlet. When the hot air blows directly onto the surface of the clothes to dry the clothes, it is limited by the structure of the air outlet, resulting in concentrated air volume and uneven drying of the clothes, which affects the drying effect and efficiency.

[0006] Summary of the Invention

[0007] Based on this, it is necessary to provide an air duct device and a clothes dryer that can supply air and dry clothes more evenly in order to solve the above problems.

[0008] A duct device includes at least two groups of duct components, each group of duct components includes a duct shell and a centrifugal fan wheel, and an air outlet is formed on the duct shell; the centrifugal fan wheel is arranged in the duct shell and is configured to form an air supply airflow flowing toward the air outlet.

[0009] In one embodiment, the air duct device includes a first air duct assembly and a second air duct assembly, the first air duct assembly includes a first air duct housing and a first centrifugal wind wheel, the first air duct housing forms a first air outlet, and the first centrifugal wind wheel is disposed in the first air duct housing;

[0010] The second air duct assembly includes a second air duct shell and a second centrifugal wind wheel. The second air duct shell forms a second air outlet. The second air outlet is spaced apart from the first air outlet. The second centrifugal wind wheel is disposed in the second air duct shell.

[0011] In one embodiment, the air duct shell includes a connected volute portion and an air duct portion, the centrifugal wind wheel is arranged in the volute portion of the air duct shell, and the air duct portion forms the air outlet respectively; the volute shape line of the volute portion is a spiral line or an arc line formed by a combination of base circles of different radii.

[0012] In one embodiment, the gap between the volute tongue of the volute portion and the centrifugal wind wheel is A, and the diameter of the centrifugal wind wheel is D, then D / 28≤A≤D / 10.

[0013] In one embodiment, an axis passing through the axis of the centrifugal wind wheel and perpendicular to the horizontal plane is the central axis Z of the centrifugal wind wheel;

[0014] The angle formed by the line connecting the volute tongue of the volute portion of the first air duct shell and the axis of the first centrifugal wind wheel and the central axis Z of the first centrifugal wind wheel is the phase angle θ1 of the volute tongue of the first air duct shell, then 30°≤θ1≤90°; and / or, the angle formed by the line connecting the volute tongue of the second air duct shell and the axis of the second centrifugal wind wheel and the central axis Z of the second centrifugal wind wheel is the phase angle θ2 of the volute tongue of the second air duct shell, then -90°≤θ2≤-30°.

[0015] In one embodiment, the first centrifugal impeller and the second centrifugal impeller are configured to rotate coaxially and in the same direction, and the volute portions of the first air duct housing and the second air duct housing are arranged in opposite directions.

[0016] In one embodiment, the opening directions of the first air outlet and the second air outlet are consistent.

[0017] In one embodiment, the air duct portion includes an outlet section and an air guide section, the outlet section is used to form an air outlet, and the air guide section is connected between the volute portion and the outlet section.

[0018] In one embodiment, the length of the air guide section is L, the diameter of the centrifugal wind wheel is D, and then D / 2≤L≤3D / 2.

[0019] In one embodiment, each group of the air duct components further includes a heating device, which is disposed in the air guide section and parallel to the axial direction of the centrifugal wind wheel;

[0020] The horizontal distance between the heating device and the centrifugal wind wheel is C, so 2D / 3≤C≤2D.

[0021] In one embodiment, the first centrifugal impeller and the second centrifugal impeller are longitudinally arranged along the same axis and spaced apart from each other;

[0022] The air duct device also includes a dual-shaft motor having two output shafts. The dual-shaft motor is arranged between the first centrifugal wind wheel and the second centrifugal wind wheel, and is respectively connected to the first centrifugal wind wheel and the second centrifugal wind wheel through the two output shafts.

[0023] In one embodiment, the air duct device further includes a motor support, and the dual-axis motor is installed between the first centrifugal wind wheel and the second centrifugal wind wheel through the motor support.

[0024] In one embodiment, the air duct device also includes a base, and the base includes a first base and a second base. The first air duct shell is arranged in the first base, and the first air outlet is formed on the outer surface of the first base; the second air duct shell is arranged in the second base, and the second air outlet is formed on the outer surface of the second base.

[0025] In one embodiment, the width of the air outlet in the first direction is b, and the diameter of the centrifugal wind wheel is D, then D / 2≤b≤D, wherein the first direction is perpendicular to the axial direction of the centrifugal wind wheel.

[0026] A clothes dryer comprises the above-mentioned air duct device.

[0027] The aforementioned air duct device and clothes dryer comprise at least two sets of air duct assemblies. Each set of air duct assemblies, driven by a centrifugal impeller, generates an airflow with a high outlet velocity and high impedance, which is blown out from its own air outlet. This effectively reduces the concentration of the supplied air, dries clothes more evenly, and improves the drying effect and efficiency. Furthermore, the provision of at least two sets of air duct assemblies also helps to expand the air supply range of the air duct device, enabling it to dry a larger number of clothes simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] FIG1 is a schematic structural diagram of an air duct device in one embodiment of the present application.

[0030] FIG2 is a schematic diagram of airflow when the air duct device shown in FIG1 is in operation.

[0031] FIG3 is a schematic structural diagram of the air duct device shown in FIG1 after being folded.

[0032] FIG. 4 is a schematic diagram of the exploded structure of the air duct device shown in FIG. 1 .

[0033] FIG5 is a schematic cross-sectional view of the first air duct assembly in the air duct device shown in FIG1 .

[0034] FIG6 is a schematic cross-sectional view of the second air duct assembly in the air duct device shown in FIG1 .

[0035] FIG. 7 is a schematic diagram of a partial structure of the air duct device shown in FIG. 1 .

[0036] FIG8 is a schematic cross-sectional view of a portion of the air duct device shown in FIG1 .

[0037] Explanation of the accompanying drawings: 100, air duct device; 11, first air duct shell; 111, first air outlet; 13, second air duct shell; 131, second air outlet; 15, volute portion; 151, volute tongue; 17, air duct portion; 171, outlet section; 173, air guide section; 175, connecting section; 31, first centrifugal wind wheel; 33, second centrifugal wind wheel; 50, heating device; 71, dual-axis motor; 711, output shaft; 73, motor support; 91, first base; 93, second base; 95, bottom air inlet grille; 97, side air inlet grille. DETAILED DESCRIPTION

[0038] To make the above-mentioned objects, features, and advantages of the present application more clearly understood, the specific embodiments of the present application are described in detail below with reference to the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways than those described herein, and those skilled in the art can make similar improvements without violating the scope of the present application. Therefore, the present application is not limited to the specific embodiments disclosed below.

[0039] In the description of this application, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0040] In addition, the term "and / or" is merely a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the objects associated before and after are in an "or" relationship. The terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0041] In this application, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0042] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0043] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0044] Referring to Figures 1 to 4, an embodiment of the present application provides an air duct device 100, which includes at least two groups of air duct components. Each group of air duct components includes an air duct shell and a centrifugal wind wheel. An air outlet is formed on the air duct shell; the centrifugal wind wheel is arranged in the air duct shell and is configured to form an air supply airflow flowing toward the air outlet.

[0045] The centrifugal impellers of all air duct components can be driven independently or synchronously. After being driven, the centrifugal impeller rotates around its own axis and generates airflow to the air outlet under the restriction of the air duct shell.

[0046] In one embodiment, the air duct device 100 can be used in a clothes dryer to generate an air flow that is blown out from an air outlet and blown toward clothes to dry them.

[0047] The air duct device 100 comprises at least two sets of air duct assemblies. Each set of air duct assemblies, driven by a centrifugal impeller, generates airflow with high outlet velocity and high impedance, which is then blown out from its own outlet. This effectively reduces the concentration of the air supply, dries clothes more evenly, and improves the drying effect and efficiency. Furthermore, the provision of at least two sets of air duct assemblies also helps to expand the air supply range of the air duct device 100, enabling it to dry a larger number of clothes simultaneously.

[0048] Furthermore, the air duct device 100 includes a first air duct assembly and a second air duct assembly. The first air duct assembly includes a first air duct housing 11 and a first centrifugal impeller 31. The first air duct housing 11 forms a first air outlet 111. The first centrifugal impeller 31 is disposed within the first air duct housing 11 and is configured to form a supply airflow toward the first air outlet 111. The second air duct assembly includes a second air duct housing 13 and a second centrifugal impeller 33. The second air duct housing 13 forms a second air outlet 131. The second air outlet 131 is spaced apart from the first air outlet 111. The second centrifugal impeller 33 is disposed within the second air duct housing 13 and is configured to form a supply airflow toward the second air outlet 131.

[0049] The air duct device 100 includes two groups of air duct components, namely a first air duct component and a second air duct component, and the air outlets formed by the two are spaced apart from each other to form double-sided air outlet, so that the drying air flow is delivered to the clothes from both sides, and the clothes are wrapped more evenly, thereby effectively improving the problems of the existing dryer with a single air duct arrangement, concentrated air supply, uneven drying of clothes, and low drying efficiency.

[0050] In some embodiments, the air duct device 100 further includes a base, which includes a first base 91 and a second base 93. The first air duct housing 11 is disposed within the first base 91 and forms a first air outlet 111 on an outer surface of the first base 91. The second air duct housing 13 is disposed within the second base 93 and forms a second air outlet 131 on an outer surface of the second base 93.

[0051] It can be understood that a bottom air inlet grille 95 and / or a side air inlet grille 97 are also formed on the base to allow air to enter the air duct assembly to form a continuous air supply airflow.

[0052] Furthermore, the first base 91 and the second base 93 are rotatably connected to each other, and both have an unfolded state and a folded state. The first air outlet 111 and the second air outlet 131 are respectively located on both sides of the rotation axis.

[0053] In this way, by folding the first base 91 and the second base 93 , the space occupied by the air duct device 100 can be reduced, making it easier to transport, store or place the air duct device 100 .

[0054] Preferably, the first centrifugal impeller 31 and the second centrifugal impeller 33 are coaxially arranged, and the axes of both are on the rotating shafts of the first base 91 and the second base 93, and the side air inlet grilles 97 are formed at both ends of the base on the rotating shaft.

[0055] In some embodiments, the air duct assembly further includes a heating device 50 , which is disposed in the air duct housing.

[0056] The air flow generated by the centrifugal fan wheel flows through the heating device 50 during the air supply process and is heated by the heating device 50, thereby achieving the function of accelerating the evaporation and drying of wet clothes.

[0057] Referring to Figures 5 and 6 , in some embodiments, the air duct housing includes a connected volute portion 15 and an air duct portion 17. A centrifugal impeller is disposed within the volute portion 15 of the air duct housing, and the air duct portion 17 forms an air outlet. The volute profile of the volute portion 15 is a spiral or an arc formed by combining base circles of different radii.

[0058] The first air duct housing 11 and the second air duct housing 13 both include a connected volute portion 15 and an air duct portion 17 . The first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 are respectively disposed in the volute portion 15 of the first air duct housing 11 and the second air duct housing 13 .

[0059] The volute portion 15 can cooperate with the centrifugal wind wheel to generate an air flow that blows toward the air duct portion 17, and the air is further guided by the air duct portion 17 to be blown out of the air outlet.

[0060] In some embodiments, the gap between the volute tongue 151 of the volute portion 15 and the centrifugal wind wheel is A, and the diameter of the centrifugal wind wheel is D, then D / 28≤A≤D / 10.

[0061] Taking the volute line as an example of a spiral line, the starting point of the spiral line, that is, the arc segment with the minimum gap between the volute portion 15 and the centrifugal wind wheel, is the volute tongue 151. The diameter of the centrifugal wind wheel refers to its outer diameter.

[0062] The ratio of the gap A between the volute tongue 151 and the centrifugal impeller to the centrifugal impeller's diameter (D) significantly affects flow rate and efficiency, and also has a certain impact on the pressure within the duct housing. When the gap A between the volute tongue 151 and the centrifugal impeller is larger, the centrifugal impeller pressure head decreases and the flow rate decreases. When the gap A between the volute tongue 151 and the centrifugal impeller is smaller, the pressure head increases and the flow rate increases, but the noise peak and sound quality also deteriorate, and this can negatively impact the subsequent assembly of the duct housing and the installation of the centrifugal impeller. Therefore, limiting the relationship between the two to D / 28 ≤ A ≤ D / 10 helps meet pressure head and flow rate requirements while also taking into account noise, sound quality, and assembly and installation requirements.

[0063] In some embodiments, an axis passing through the axis of the centrifugal fan wheel and perpendicular to the horizontal plane is the central axis Z of the centrifugal fan wheel. The angle formed by the line connecting the volute tongue 151 of the first air duct housing 11 and the axis of the first centrifugal fan wheel 31 and the central axis Z of the first centrifugal fan wheel 31 is the phase angle θ1 of the volute tongue 151 of the first air duct housing 11, and 30°≤θ1≤90°.

[0064] Taking the central axis Z of the first centrifugal wind wheel 31 as a reference, the volute tongue 151 of the first air duct shell 11 is arranged with a clockwise positive angle distribution. The phase angle of the volute tongue 151 is the main control parameter of the wind cutting angle of the air duct shell. If the size is too small, the distance between the volute tongue 151 and the lower wall of the air duct shell will be reduced, increasing its outlet resistance in the volute part 15 and increasing the wall reflection noise. If the size is too large, the area of ​​the near-wall vortex zone will increase, thereby increasing the air volume loss and increasing the vortex noise in the near-wall area. Therefore, in order to ensure smooth air supply of the first air duct assembly and reduce aerodynamic noise, the phase angle θ1 of the volute tongue 151 should be between 30° and 90°.

[0065] In some embodiments, the angle formed by the line connecting the volute tongue 151 of the second air duct housing 13 and the axis of the second centrifugal fan wheel 33 and the central axis Z of the second centrifugal fan wheel 33 is the phase angle θ2 of the volute tongue 151 of the second air duct housing 13, then -30°≤θ2≤-90°.

[0066] With the central axis Z of the second centrifugal wind wheel 33 as a reference, the volute tongue 151 of the second air duct housing 13 is arranged with a counterclockwise negative angle distribution. For similar purposes as mentioned above, the phase angle θ2 of the volute tongue 151 should preferably be between 30° and 90°.

[0067] The absolute values ​​of θ1 and θ2 can be the same. Under the premise that the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 can rotate coaxially and in the same direction, the first air duct housing 11 and the second air duct housing 13 can be arranged relative to each other, each forming air supply on different sides, thereby achieving synchronous and uniform wind cutting on both sides.

[0068] In some embodiments, the first centrifugal impeller 31 and the second centrifugal impeller 33 are configured to rotate coaxially and in the same direction, and the volute portions 15 of the first air duct housing 11 and the second air duct housing 13 are arranged in opposite directions.

[0069] The volute parts 15 of the first air duct housing 11 and the second air duct housing 13 are arranged in opposite directions, so that the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 rotating in the same direction can generate air supply airflow formed from both sides of the rotating shaft to form uniform air supply on both sides.

[0070] In some embodiments, the openings of the first air outlet 111 and the second air outlet 131 are oriented in the same direction. Specifically, the openings of the first air outlet 111 and the second air outlet 131 are both oriented upward in the height direction.

[0071] In other words, the air duct portions 17 of the first air duct housing 11 and the second air duct housing 13 are respectively configured to extend in the same direction in the areas close to the air outlet.

[0072] In this way, although the first air outlet 111 and the second air outlet 131 are located at different positions, the airflow generated can be accurately blown toward the clothes located above, so as to achieve efficient drying of the clothes.

[0073] In some embodiments, the air duct portion 17 includes an outlet section 171 and an air guide section 173. The outlet section 171 is used to form an air outlet, and the air guide section 173 communicates between the volute portion 15 and the outlet section 171. It can be understood that the air guide section 173 can extend in a straight direction.

[0074] The air duct portion 17 may further include a connecting section 175 , which is connected between the volute portion 15 and the air guide section 173 , and rectifies the airflow generated by the volute portion 15 into a suitable direction before sending it to the air guide section 173 .

[0075] Because the air flow field output by the volute part 15 will be deflected along the tangential direction of the volute tongue 151, in order to ensure that the main air beam at the air outlet is evenly supplied upward perpendicular to the ground, the air guide section 173 is provided to utilize the process of the air flow flowing in the air guide section 173 to rectify the air flow, eliminate the oblique angle of the air flow, effectively improve the air supply deviation phenomenon, and thus enhance the uniformity of the air duct drying.

[0076] Furthermore, the length of the wind guide section 173 is L, and the diameter of the centrifugal wind wheel is D, then D / 2≤L≤3D / 2.

[0077] If the distance of air guide section 173 is too small, the above effect cannot be achieved. If the distance is too large, friction losses along the air duct will increase, reducing the outlet air speed and air volume. Therefore, limiting the length L of air guide section 173 to D / 2 ≤ L ≤ 3D / 2 can achieve the effect of improving air deflection while reasonably controlling airflow losses.

[0078] In some embodiments, the heating device 50 is disposed in the air guide section 173 and is parallel to the axial direction of the centrifugal wind wheel. The horizontal distance between the heating device 50 and the centrifugal wind wheel is C, and 2D / 3≤C≤2D.

[0079] The heating device 50 may be, but is not limited to, a heating wire, a PTC heating element, etc., as long as it can generate heat and maintain the conductivity of the air guide section 173.

[0080] If the horizontal spacing C between the heating device 50 and the centrifugal impeller is too small, the high temperature of the heating device 50 itself can cause deformation of the centrifugal impeller, affecting its aerodynamic performance. If the heating device 50 is too far from the centrifugal impeller, the surface of the heating device 50 will be unevenly affected by the airflow, affecting the heating effect of the dryer. Therefore, setting 2D / 3≤C≤2D can reduce the impact of the high temperature generated by the heating device 50 on the centrifugal impeller while ensuring more uniform airflow across the surface of the heating device 50, thereby improving the heating effect of the dryer.

[0081] In some embodiments, the width of the air outlet in the first direction (corresponding to the left-right direction in FIG. 5 and FIG. 6 ) is b, and the diameter of the centrifugal impeller is D, then D / 2≤b≤D. The first direction is perpendicular to the axial direction of the centrifugal impeller.

[0082] If the outlet is too small, the width of the air beam will be reduced, affecting the uniformity of airflow to the clothes. If it is too large, the air speed on the left and right sides of the outlet will be uneven, reducing the air speed at the outlet and thus affecting the dryer's performance. Therefore, set D / 2≤b≤D to increase the width of the air beam while maintaining the air speed at the outlet.

[0083] Referring to Figures 7 and 8 , in some embodiments, the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 are longitudinally arranged along the same axis and spaced apart from each other. The air duct device 100 further includes a dual-shaft motor 71 having two output shafts 711 . The dual-shaft motor 71 is disposed between the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 and is respectively connected to the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 via the two output shafts 711 .

[0084] The two output shafts 711 of the dual-axis motor 71 are located at opposite ends thereof. The dual-axis motor 71 simultaneously drives the two centrifugal impellers to rotate, serving as the core pneumatic source of the entire air duct device 100, which helps to simplify the structure of the air duct device 100.

[0085] In some embodiments, the air duct device 100 further includes a motor support 73 , and the dual-axis motor 71 is installed between the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 through the motor support 73 .

[0086] The motor support 73 can stably fix the dual-axis motor 71, which helps it run smoothly and also helps reduce operating noise.

[0087] It is understandable that in some other embodiments, the first centrifugal fan wheel 31 and the second centrifugal fan wheel 33 can also be driven to rotate by two different motors, or driven by the same motor and then rotated in opposite directions through a transmission mechanism, etc., which is not specifically limited here.

[0088] The present application also provides a clothes dryer, comprising the above-mentioned air duct device 100. It is understandable that in order to achieve its normal function, the clothes dryer also includes a conventional clothes drying rack, a base, etc., which will not be described in detail here.

[0089] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0090] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent application. It should be noted that a person of ordinary skill in the art may make various modifications and improvements without departing from the spirit of the present application, and these modifications and improvements fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. An air duct device, characterized in that: The air duct device includes at least two groups of air duct components, each group of air duct components includes an air duct shell and a centrifugal wind wheel, and an air outlet is formed on the air duct shell; the centrifugal wind wheel is arranged in the air duct shell and is configured to form an air supply airflow flowing toward the air outlet.

2. The air duct device according to claim 1, characterized in that: The air duct device comprises a first air duct component and a second air duct component, the first air duct component comprises a first air duct shell (11) and a first centrifugal wind wheel (31), the first air duct shell (11) forms a first air outlet (111), and the first centrifugal wind wheel (31) is arranged in the first air duct shell (11); The second air duct assembly comprises a second air duct shell (13) and a second centrifugal wind wheel (33); the second air duct shell (13) forms a second air outlet (131); the second air outlet (131) is spaced apart from the first air outlet (111); and the second centrifugal wind wheel (33) is disposed in the second air duct shell (13).

3. The air duct device according to claim 2, characterized in that: The air duct casing comprises a volute portion (15) and an air duct portion (17) which are connected to each other; the centrifugal wind wheel is arranged in the volute portion (15) of the air duct casing; the air duct portions (17) respectively form the air outlets; and the volute shape line of the volute portion (15) is a spiral line or an arc line formed by a combination of base circles of different radii.

4. The air duct device according to claim 3, characterized in that: The gap between the volute tongue (151) of the volute portion (15) and the centrifugal wind wheel is A, and the diameter of the centrifugal wind wheel is D, then D / 28≤A≤D / 10.

5. The air duct device according to claim 4, characterized in that: The axis passing through the axis of the centrifugal wind wheel and perpendicular to the horizontal plane is the central axis Z of the centrifugal wind wheel; The angle formed by a line connecting the volute tongue (151) of the volute portion (15) of the first air duct shell (11) and the axis of the first centrifugal wind wheel (31) and the center axis Z of the first centrifugal wind wheel (31) is the phase angle θ1 of the volute tongue (151) of the first air duct shell (11), and 30°≤θ1≤90°; and / or the angle formed by a line connecting the volute tongue (151) of the second air duct shell (13) and the axis of the second centrifugal wind wheel (33) and the center axis Z of the second centrifugal wind wheel (33) is the phase angle θ2 of the volute tongue (151) of the second air duct shell (13), and -90°≤θ2≤-30°.

6. The air duct device according to claim 3, characterized in that: The first centrifugal wind wheel (31) and the second centrifugal wind wheel (33) are configured to rotate coaxially and in the same direction, and the volute parts (15) of the first air duct shell (11) and the second air duct shell (13) are arranged in opposite directions.

7. The air duct device according to claim 6, characterized in that: The opening directions of the first air outlet (111) and the second air outlet (131) are consistent.

8. The air duct device according to claim 3, characterized in that: The air duct portion (17) comprises an outlet section (171) and an air guide section (173); the outlet section (171) is used to form an air outlet; and the air guide section (173) is connected between the volute portion (15) and the outlet section (171).

9. The air duct device according to claim 8, characterized in that: The length of the wind guide section (173) is L, and the diameter of the centrifugal wind wheel is D, then D / 2≤L≤3D / 2.

10. The air duct device according to claim 8, characterized in that: Each group of the air duct components further comprises a heating device (50), wherein the heating device (50) is arranged in the air guide section (173) and is arranged parallel to the axial direction of the centrifugal wind wheel; The horizontal distance between the heating device (50) and the centrifugal wind wheel is C, and 2D / 3≤C≤2D.

11. The air duct device according to any one of claims 2 to 10, characterized in that: The first centrifugal wind wheel (31) and the second centrifugal wind wheel (33) are longitudinally arranged along the same axis and are spaced apart from each other; The air duct device further comprises a dual-shaft motor (71), the dual-shaft motor (71) having two output shafts (711), the dual-shaft motor (71) being arranged between the first centrifugal wind wheel (31) and the second centrifugal wind wheel (33), and being respectively connected to the first centrifugal wind wheel (31) and the second centrifugal wind wheel (33) by transmission via the two output shafts (711).

12. The air duct device according to claim 11, characterized in that: The air duct device also includes a motor support (73), and the dual-axis motor (71) is installed between the first centrifugal wind wheel (31) and the second centrifugal wind wheel (33) via the motor support (73).

13. The air duct device according to any one of claims 2 to 10, characterized in that: The air duct device also includes a base, which includes a first base (91) and a second base (93); the first air duct shell (11) is arranged in the first base (91), and the first air outlet (111) is formed on the outer surface of the first base (91); the second air duct shell (13) is arranged in the second base (93), and the second air outlet (131) is formed on the outer surface of the second base (93).

14. The air duct device according to any one of claims 1 to 10, characterized in that: The width of the air outlet in the first direction is b, and the diameter of the centrifugal wind wheel is D, then D / 2≤b≤D, wherein the first direction is perpendicular to the axial direction of the centrifugal wind wheel.

15. A clothes dryer, characterized in that: The invention comprises the air duct device according to any one of claims 1 to 14.

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