Laundry treating apparatus

Abstract

The utility model discloses a clothes processing device which is provided with a clothes processing cavity and an air duct cavity, the clothes processing cavity is provided with a first air inlet and a first air outlet, the air duct cavity is provided with a second air inlet and a second air outlet, the second air inlet is communicated with the first air outlet, the clothes processing device comprises a fan, and the fan comprises a volute and an impeller. The volute comprises a volute body, an inner cavity of the volute body is communicated with the first air inlet and the second air outlet, the inner cavity of the volute body comprises an impeller cavity, and the impeller is arranged in the impeller cavity; the volute tongue is located at the outlet of the impeller cavity and comprises a first volute tongue part, and the contour line of the side, facing the outlet, of the first volute tongue part gradually inclines towards the outlet in the axial direction of the impeller. According to the clothes processing device, the phases of periodic noise generated when airflow impacts the volute tongue can be staggered, so that noise of some phases can be counteracted mutually, and the noise reduction effect is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of clothing processing, and more specifically, to a clothing processing device. Background Art

[0002] In the related art, a fan is provided in a clothing processing device, and the fan is used to drive air flow to dry the clothing, etc. However, the fan in the related art generates relatively large noise, resulting in relatively large noise when the clothing processing device is working, which needs to be further optimized. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the utility model is to provide a clothes processing device, which produces less noise when working.

[0004] According to the clothing processing device of the embodiment of the utility model, the clothing processing device has a clothing processing chamber and an air duct chamber, the clothing processing chamber has a first air inlet and a first air outlet, the air duct chamber has a second air inlet and a second air outlet, the second air inlet is connected to the first air outlet, the clothing processing device includes a fan, the fan includes a volute and an impeller, the volute includes: a volute body, the inner cavity of the volute body is connected to the first air inlet and the second air outlet, the inner cavity of the volute body includes an impeller chamber, the impeller is arranged in the impeller chamber; a volute tongue, the volute tongue is located at the outlet of the impeller chamber, the volute tongue includes a first volute tongue portion, and the contour line of the first volute tongue portion on one side facing the outlet gradually inclines toward the outlet along the axial direction of the impeller.

[0005] According to the laundry processing device of the embodiment of the utility model, by providing a volute tongue including a first volute tongue portion, the first volute tongue portion gradually tilts toward the outlet along the axial direction of the impeller on the side facing the outlet, so that when the fan is running, the phases of the periodic noise generated by the airflow impacting the volute tongue will be staggered, so that the noises of certain phases will cancel each other out, thereby achieving the effect of noise reduction. As a result, the noise of the laundry processing device is relatively small when it is working.

[0006] In addition, the clothes processing device according to the above embodiment of the utility model may also have the following additional technical features:

[0007] According to some embodiments of the present invention, an angle between a contour line of the first volute tongue portion facing the outlet or a tangent line of the contour line and the axis of the impeller is 15° to 45°.

[0008] According to some embodiments of the present utility model, the volute body has a first side and a second side which are arranged opposite to each other in the axial direction of the impeller, and the inlet of the impeller chamber is located on the first side;

[0009] Wherein, along the axial direction of the impeller from the second side to the first side, the side of the first volute tongue portion facing the outlet gradually inclines toward the outlet.

[0010] According to some embodiments of the present invention, the volute tongue further includes a second volute tongue portion, the second volute tongue portion and the first volute tongue portion are arranged in the axial direction of the impeller, and the first volute tongue portion is arranged closer to the inlet of the impeller cavity;

[0011] Wherein, a contour line of one side of the second volute tongue portion toward the outlet extends along the axial direction of the impeller, or, along the axial direction of the impeller from the second side to the first side, a contour line of one side of the second volute tongue portion toward the outlet gradually inclines toward the outlet and an inclination angle of the contour line of the second volute tongue portion is smaller than an inclination angle of the contour line of the first volute tongue portion.

[0012] According to some embodiments of the present invention, the ratio of the axial dimension of the first volute tongue portion to the axial dimension of the impeller chamber is 0.7-1.

[0013] According to some embodiments of the present utility model, the inner cavity of the volute body also includes an air outlet cavity, the air outlet cavity is connected between the impeller cavity and the first air inlet, and the volute tongue is located between the impeller cavity and the air outlet cavity.

[0014] According to some embodiments of the present invention, the volute body and the volute tongue are integrally injection molded.

[0015] According to some embodiments of the present invention, the ratio of the axial dimension of the impeller to the diameter of the impeller is 0.2-0.4; or, the axial dimension of the impeller is 30-40 mm, and the diameter of the impeller is 120-140 mm.

[0016] According to some embodiments of the utility model, the impeller includes a wheel disc and a plurality of blades, the plurality of blades are connected to a side of the wheel disc facing the inlet of the impeller chamber and are arranged at circumferential intervals on a circle, and the blades and the wheel disc are metal parts.

[0017] According to some embodiments of the present invention, the thickness of the blade is 0.2 mm to 0.8 mm.

[0018] According to some embodiments of the present invention, the impeller further includes an end plate, the end plate and the wheel disc are spaced apart in the axial direction of the impeller, a plurality of blades are connected between the end plate and the wheel disc, and the end plate is a metal part.

[0019] According to some embodiments of the present invention, the impeller has an air inlet cavity arranged opposite to the inlet of the impeller cavity, and the plurality of blades are arranged at intervals along the circumference of the air inlet cavity. The edge of the blade on one side facing the air inlet cavity is the leading edge, and a portion of the leading edge of at least one blade extends from outside the air inlet cavity to inside the air inlet cavity in a direction away from the inlet of the impeller cavity.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a partial structural schematic diagram of a clothes processing device according to an embodiment of the utility model;

[0023] Figure 2 yes Figure 1 A partial enlarged view of part A;

[0024] Figure 3 It is a structural schematic diagram of an impeller according to an embodiment of the utility model;

[0025] Figure 4 It is a front view of the impeller according to the embodiment of the utility model;

[0026] Figure 5 is a side view of an impeller according to an embodiment of the utility model;

[0027] Figure 6 yes Figure 3 A partial enlarged view of part B;

[0028] Figure 7 It is a schematic diagram of the structure of the blade according to the embodiment of the utility model;

[0029] Figure 8 is a front view of a blade according to an embodiment of the utility model;

[0030] Fig. 9 yes Figure 4 A partial enlarged view of part C.

[0031] Reference numerals:

[0032] Clothes treating device 100;

[0033] Impeller 10;

[0034] Air inlet cavity 101; blade 102; leading edge 1021; first edge 1022;

[0035] Second edge 1023; trailing edge 1024; first extension 1025; second extension 1026;

[0036] Wheel 103; end plate 104; vent 1041;

[0037] Air duct assembly 20; air duct cavity 202; second air inlet 201;

[0038] Volute 30;

[0039] Impeller chamber 301; volute body 302; volute tongue 303; first volute tongue portion 3031;

[0040] Second volute tongue portion 3032; annular wall 304; outlet 305; air outlet cavity 306;

[0041] Fan 200. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0043] In the description of the present invention, it should be understood that 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" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0044] In the description of the present invention, "first feature" and "second feature" may include one or more such features, "plurality" means two or more, the first feature "above" or "below" the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them, the first feature "above", "above" and "above" the second feature may include the first feature being directly above and diagonally above the second feature, or may simply mean that the first feature is at a higher level than the second feature.

[0045] The laundry treating apparatus 100 according to an embodiment of the present invention will be described below with reference to the accompanying drawings.

[0046] Reference Figure 1-Figure 9 As shown, the clothes processing device 100 according to the embodiment of the utility model has a clothes processing chamber and an air duct chamber 202. The clothes processing device 100 in the embodiment of the utility model can be a clothes dryer, a clothes drying machine, a clothes sterilizing machine, a clothes care machine, or a washer-dryer, etc. The clothes processing device 100 can be an air circulation type clothes dryer or a direct exhaust type clothes dryer.

[0047] The clothing processing chamber has a first air inlet and a first air outlet, the air duct chamber 202 has a second air inlet 201 and a second air outlet, the second air inlet 201 is connected to the first air outlet, the clothing processing device 100 includes a fan 200, the fan 200 includes a volute 30 and an impeller 10, the volute 30 includes a volute body 302 and a volute tongue 303, the inner cavity of the volute body 302 is connected to the first air inlet and the second air outlet, the inner cavity of the volute body 302 includes an impeller chamber 301, and the impeller 10 is arranged in the impeller chamber 301; the volute tongue 303 is connected to the annular wall 304 of the impeller chamber 301 and is located at the outlet 305 of the impeller chamber 301, the volute tongue 303 includes a first volute tongue portion 3031, and the contour line of the first volute tongue portion 3031 on one side facing the outlet 305 gradually inclines toward the outlet 305 along the axial direction of the impeller 10.

[0048] Specifically, the clothing treatment chamber is used to accommodate clothing, and the clothing treatment chamber can be used to perform one or more of a drying process, a sterilization process, and a fragrance enhancement process on the clothing. Figure 1 As shown by the straight arrow in , the airflow discharged from the inner cavity of the volute body 302 enters the laundry processing cavity through the first air inlet, then is discharged from the first air outlet, then enters the air duct cavity 202 from the second air inlet 201, then leaves the air duct cavity 202 from the second air outlet, and finally returns to the inner cavity of the volute body 302, forming a cycle. An impeller 10 is provided in the impeller cavity 301, and the impeller 10 rotates under the drive of the motor to drive the airflow and provide power for the airflow.

[0049] In some embodiments, one or more of an airflow heating component, an evaporator, a condenser, etc. may be provided in the air duct cavity 202, so that the water vapor in the airflow condenses into water droplets and the airflow temperature increases; a sterilization component or an aromatherapy component, etc. may also be provided in the air duct cavity 202.

[0050] The volute tongue 303 is connected to the annular wall 304 of the impeller chamber 301 and is located at the outlet 305 of the impeller chamber 301. The airflow entering the inner cavity of the volute body 302 will first enter the impeller chamber 301, and then flow out of the impeller chamber 301 through the outlet 305 of the impeller chamber 301. When the airflow passes near the volute tongue 303, the volute tongue 303 divides the airflow into two parts: most of the airflow flows out of the impeller chamber 301 from the outlet 305 of the impeller chamber 301, and a small part of the airflow flows back to the impeller chamber 301 through the gap between the volute tongue 303 and the annular wall 304 of the impeller chamber 301. After rotating with the impeller 10 for one circle in the impeller chamber 301, it returns to the volute tongue 303 to participate in the new diversion. The volute tongue 303 can reduce the circulation of the airflow in the volute 30 and improve the exhaust efficiency.

[0051] However, the volute tongue of the fan in the related art is usually a straight volute tongue structure, that is, the size of the volute tongue is uniform along the axial direction of the impeller, and periodic noise is generated when the airflow hits the volute tongue when the fan is running.

[0052] The contour line of one side of the first volute tongue portion 3031 toward the outlet 305 gradually inclines toward the outlet 305 along the axial direction of the impeller 10, which includes: the contour line of one side of the first volute tongue portion 3031 toward the outlet 305 is a straight line, and the contour line gradually inclines toward the outlet 305 along the axial direction of the impeller 10; or, the contour line of one side of the first volute tongue portion 3031 toward the outlet 305 is a curve, and the tangent of any point of the curve gradually inclines toward the outlet 305 along the axial direction of the impeller 10.

[0053] According to the laundry processing device 100 of the embodiment of the utility model, by providing the volute tongue 303 including the first volute tongue portion 3031, the contour line of the first volute tongue portion 3031 on one side facing the outlet 305 is gradually inclined toward the outlet 305 along the axial direction of the impeller 10, so that when the fan 200 is running, the phases of the periodic noise generated by the airflow impacting the volute tongue 303 will be staggered, so that the noises of certain phases will cancel each other out, thereby achieving the effect of noise reduction. As a result, the noise of the laundry processing device 100 is relatively small during operation.

[0054] According to some embodiments of the present invention, reference can be made to Figure 2As shown, the angle β between the contour line of the first volute tongue portion 3031 on one side facing the outlet 305 or the tangent i2 of the contour line and the axis i1 of the impeller 10 is 15° to 45°. For example, the angle between the side of the first volute tongue portion 3031 facing the outlet 305 and the axial direction of the impeller 10 can be 15°, 20°, 25°, 30°, 35°, 40°, 45° or any value between any two values. The angle between the contour line of the first volute tongue portion 3031 on one side facing the outlet 305 or the tangent i2 of the contour line and the axis i1 of the impeller 10 is within this range, the size of the volute tongue 303 will not be too large to affect the normal air outlet at the outlet 305 of the impeller chamber 301, and the size of the volute tongue 303 will not be too small to result in poor noise reduction effect. In other embodiments, the angle between the side of the first volute tongue portion 3031 facing the outlet 305 and the axial direction of the impeller 10 can also be 50°, 55°, 60°, etc.

[0055] According to some embodiments of the present invention, reference can be made to Figure 1 and Figure 2 As shown, the volute body 302 has a first side and a second side that are oppositely arranged in the axial direction of the impeller 10, and the inlet of the impeller chamber 301 is located on the first side; wherein, along the axial direction of the impeller 10 from the second side to the first side, the first volute tongue portion 3031 gradually tilts toward the outlet 305 on the side facing the outlet 305. In other words, along the direction perpendicular to the outlet 305, the part of the first volute tongue portion 3031 with a larger area is close to the first side and close to the inlet of the impeller chamber 301. In this way, the phases of the periodic noise generated by the airflow impacting the volute tongue 303 can be staggered, and the noises with staggered phases will offset each other to a part, so as to achieve the effect of noise reduction.

[0056] In other embodiments, along the axial direction of the impeller 10 from the first side to the second side, the first volute tongue portion 3031 gradually tilts toward the outlet 305 on the side facing the outlet 305. That is, along the direction perpendicular to the outlet 305, the portion of the first volute tongue portion 3031 with a larger area is close to the second side and away from the inlet of the impeller chamber 301, so that the phases of the periodic noise generated by the airflow impacting the volute tongue 303 can be staggered, and the noises with staggered phases can offset each other to achieve a noise reduction effect.

[0057] It should be noted that most of the airflow flowing radially outward from the impeller 10 to the outlet 305 is closer to the second side, and along the axial direction of the impeller 10 from the second side to the first side, the first volute tongue portion 3031 gradually tilts toward the outlet 305 on the side facing the outlet 305, that is, along the direction perpendicular to the outlet 305, the area of ​​the first volute tongue portion 3031 close to the first side is larger, and the area close to the second side is smaller, so that the airflow is less blocked and the air output of the fan 200 is less affected.

[0058] According to some embodiments of the present invention, reference can be made to Figure 2 As shown, the volute tongue 303 also includes a second volute tongue portion 3032, the second volute tongue portion 3032 and the first volute tongue portion 3031 are arranged in the axial direction of the impeller 10, and the first volute tongue portion 3031 is arranged closer to the inlet of the impeller chamber 301, and the contour line of the second volute tongue portion 3032 on one side facing the outlet 305 extends along the axial direction of the impeller 10. In this way, the phases of the periodic noise generated by the airflow impacting the volute tongue 303 can be staggered, and the noises with staggered phases will offset each other to achieve a noise reduction effect. The contour line of the second volute tongue portion 3032 on one side facing the outlet 305 extends along the axial direction of the impeller 10, that is, the extension direction of the contour line of the second volute tongue portion 3032 on one side facing the outlet 305 can be parallel to the axial direction of the impeller 10.

[0059] According to some embodiments of the present invention, the volute tongue 303 further includes a second volute tongue portion 3032, the second volute tongue portion 3032 and the first volute tongue portion 3031 are arranged in the axial direction of the impeller 10, and the first volute tongue portion 3031 is arranged closer to the inlet of the impeller chamber 301, and along the axial direction of the impeller 10 from the second side to the first side, the contour line of the second volute tongue portion 3032 toward the outlet 305 gradually tilts toward the outlet 305, and the inclination angle of the contour line of the second volute tongue portion 3032 is smaller than the inclination angle of the contour line of the first volute tongue portion 3031. For example, the inclination angle of the first volute tongue portion 3031 can be greater than 0° and less than 45°, for example, 5°, 10°, 15°, 20°, 25°, etc. In this way, the phases of the periodic noise generated by the airflow impacting the volute tongue 303 can be staggered, and the noises with staggered phases can offset each other to achieve a noise reduction effect.

[0060] In the embodiment where the angle between the side of the first volute tongue portion 3031 facing the outlet 305 and the axial direction of the impeller 10 is 15° to 45°, the ratio of the axial dimension of the first volute tongue portion 3031 to the axial dimension of the impeller chamber 301 is 0.7 to 1. In this way, the size of the volute tongue 303 will not be too small, and the noise reduction effect of the volute tongue 303 is better. For example, the ratio of the axial dimension of the first volute tongue portion 3031 to the axial dimension of the impeller chamber 301 is 0.7, 0.8, 0.9, 1.0, or any value between any two of these values.

[0061] According to some embodiments of the present invention, reference can be made to Figure 1As shown, the inner cavity of the volute body 302 also includes an air outlet cavity 306, which is connected between the impeller cavity 301 and the first air inlet, and the volute tongue 303 is located between the impeller cavity 301 and the air outlet cavity 306. The air outlet cavity 306 is used to guide the airflow, and the airflow discharged from the outlet 305 of the impeller cavity 301 will flow to the clothing processing cavity through the air outlet cavity 306 and the first air inlet, and the volute tongue 303 is located between the impeller cavity 301 and the air outlet cavity 306, so that the airflow enters the air outlet cavity 306 as much as possible, reducing the circulation of the airflow in the impeller cavity 301.

[0062] According to some embodiments of the present invention, the volute body 302 is a plastic part. In this way, the volute 30 is easy to shape and has low manufacturing cost.

[0063] According to some embodiments of the present invention, the volute body 302 and the volute tongue 303 are integrally injection molded, thereby saving assembly steps, and the volute tongue 303 and the volute body 302 are not easily separated, and the durability is good.

[0064] In other embodiments, the volute body 302 and the volute tongue 303 may also be formed separately and then connected as one body, for example, the volute body 302 and the volute tongue 303 are connected by gluing, clamping or bolting.

[0065] According to some embodiments of the present invention, reference can be made to Figure 4 and Figure 5 As shown, the ratio of the axial dimension H of the impeller 10 to the diameter D of the impeller 10 is 0.2 to 0.4. For example, the ratio of the axial dimension H of the impeller 10 to the diameter D of the impeller 10 can be 0.2, 0.22, 0.24, 0.26, 0.28, 0.3, 0.32, 0.34, 0.36, 0.38, 0.4 or any value between two values. When the ratio of the axial dimension H of the impeller 10 to the diameter D of the impeller 10 is within this range, when the airflow flows in the impeller 10, the airflow has good flow stability, turbulence and eddy current are not likely to occur, and the working efficiency of the impeller 10 is high; at the same time, the axial dimension of the blade 102 will not be too small, and the working efficiency of the impeller 10 is good.

[0066] According to some embodiments of the present invention, reference can be made to Figure 4 and Figure 5 As shown, the axial dimension H of the impeller 10 is 30-40 mm, and the diameter D of the impeller 10 is 120-140 mm.

[0067] It should be noted that the axial dimension of the impeller in the related art is more than 40 mm, and the diameter of the impeller is more than 150 mm, that is, the size of the impeller is relatively large. In order to further improve the clothing treatment device 100, so that the clothing treatment device 100 has more functions or better use effects, it is necessary to add some components, which will occupy the space of the clothing treatment device 100. The axial dimension H of the impeller 10 of the present application is 30-40 mm, and the diameter D of the impeller 10 is 120-140 mm, that is, the size of the impeller 10 of the present application is smaller, so that the space occupied by the volute 30 defining the impeller cavity 301 is reduced, so as to leave space for arranging other components. At the same time, the impeller 10 is made into a metal impeller, and the proportion of the impeller 10 occupying the internal space of the volute 30 is smaller, so that the volume of the air inlet cavity 101 will not be too small, thereby making the working efficiency of the impeller 10 not greatly reduced.

[0068] According to some embodiments of the present invention, reference can be made to Figures 3 to 6 As shown, the impeller 10 includes a wheel disc 103 and a plurality of blades 102, wherein the plurality of blades 102 are connected to a side of the wheel disc 103 facing the inlet of the impeller chamber 301 and are arranged at intervals in the circumferential direction of a circle. The wheel disc 103 is used to be connected to the output shaft of the motor, and the rotation of the motor output shaft drives the wheel disc 103 to rotate, thereby driving the plurality of blades 102 to rotate and drive the airflow to flow, and at the same time, the wheel disc 103 also plays a role in preventing the airflow from flowing to the side of the wheel disc 103 facing away from the inlet of the impeller chamber 301.

[0069] According to some embodiments of the utility model, the blades 102 and the wheel disc 103 are metal parts. In this way, the wheel disc 103 and the blades 102 have high tensile strength and good bending resistance when the impeller 10 rotates at a high speed, which is beneficial for reducing the size of the impeller 10 while preventing a significant reduction in the working efficiency of the impeller 10.

[0070] According to some embodiments of the present invention, the blade 102 and the wheel disc 103 are riveted. In this way, the connection between the blade 102 and the wheel disc 103 is more convenient, and the blade 102 and the wheel disc 103 are not easily broken or separated. Specifically, for example, the wheel disc 103 has a riveting hole, and the blade 102 has a riveting part, which is inserted into the riveting hole and then riveted to the riveting hole. In other embodiments, the blade 102 and the wheel disc 103 can also be welded, etc.

[0071] According to some embodiments of the present invention, reference can be made to Fig. 9As shown, the thickness d of the blade 102 is 0.2mm to 0.8mm. It should be noted that the blade is usually made of plastic. In order to ensure the strength of the blade, the thickness d of the blade is usually much greater than 1mm. If the size of the impeller 10 is directly reduced without reducing the thickness d of the blade 102, the volume of the air inlet chamber 101 of the impeller 10 will be greatly reduced, the vortex generated by the airflow flowing to the blade 102 will increase, and the working efficiency of the impeller 10 will be greatly reduced. The blade 102 in the present application is a metal blade, and the thickness d of the blade 102 can reach 0.2mm to 0.8mm. That is to say, the thickness d of the blade 102 in the present application is small, and the space occupied by the air inlet chamber 101 is less, which is conducive to reducing the generation of vortex, so that the working efficiency of the impeller 10 will not be greatly reduced. Specifically, for example, the thickness d of the blade 102 can be 0.2mm, 0.3mm, 0.4mm, 0.5mm, 0.6mm, 0.7mm, 0.8mm or any value between two values.

[0072] According to some embodiments of the present invention, reference can be made to Figure 3 and Figure 5 As shown, the impeller 10 further includes an end plate 104, the end plate 104 and the wheel disc 103 are spaced apart in the axial direction of the impeller 10, and a plurality of blades 102 are connected between the end plate 104 and the wheel disc 103. The blades 102 are installed between the end plate 104 and the wheel disc 103, so that the blades 102 are not easily deformed or shaken, and the working efficiency is high, and the end plate 104 can guide the flow of airflow and reduce the generation of turbulence and eddy currents.

[0073] According to some embodiments of the present invention, the end plate 104 is a metal part. In this way, the end plate 104 has high tensile strength and good bending resistance when the impeller 10 rotates at a high speed. In addition, the molding thickness of the end plate 104 can be reduced, and the space occupied by the air inlet chamber 101 can be reduced, which is conducive to reducing the size of the impeller 10 while preventing the working efficiency of the impeller 10 from being greatly reduced.

[0074] According to some embodiments of the present invention, the blade 102 and the end plate 104 are riveted. In this way, the connection between the blade 102 and the end plate 104 is more convenient, and the blade 102 and the end plate 104 are not easily broken or separated. Specifically, for example, the end plate 104 has a riveting hole, and the blade 102 has a riveting part, which is inserted into the riveting hole and then riveted to the riveting hole. In other embodiments, the blade 102 and the end plate 104 can also be welded.

[0075] According to some embodiments of the present invention, reference can be made to Figure 3 , Figures 6 to 8As shown, the impeller 10 has an air inlet chamber 101 arranged opposite to the inlet of the impeller chamber 301, and a plurality of blades 102 are arranged at intervals along the circumference of the air inlet chamber 101. The edge of the blade 102 on one side facing the air inlet chamber 101 is a leading edge 1021. A portion of the leading edge 1021 of at least one blade 102 extends from outside the air inlet chamber 101 to inside the air inlet chamber 101 in a direction away from the inlet of the impeller chamber 301.

[0076] It should be noted that the airflow entering from the inlet of the impeller cavity 301 will flow to the air inlet cavity 101, and then flow along the radial direction of the impeller 10. When the airflow flows, the airflow will impact the leading edge 1021 of the blade 102. The leading edge of the blade in the related art extends along the axial direction of the impeller, and the entire leading edge is perpendicular to the radially flowing airflow. The impact force of the airflow impacting the leading edge is large, and the pressure fluctuations are in phase, resulting in a large noise when the impeller is working.

[0077] A portion of the leading edge 1021 of the blade 102 in the present application extends from outside the air inlet cavity 101 to inside the air inlet cavity 101 in a direction away from the inlet of the impeller cavity 301. That is to say, a portion of the leading edge 1021 is not perpendicular to the radially flowing airflow, thereby buffering the impact of the airflow on the leading edge 1021, reducing the number and size of the generated vortices, and staggering the phases of the pressure fluctuations. Some of the pressure fluctuations can offset each other, thereby achieving a noise reduction effect.

[0078] Among the multiple blades 102 of the impeller 10, only a portion of the leading edge 1021 of some of the blades 102 may extend from outside the air inlet cavity 101 to inside the air inlet cavity 101 toward the direction away from the entrance of the impeller cavity 301; or, a portion of the leading edge 1021 of all the blades 102 of the multiple blades 102 of the impeller 10 may extend from outside the air inlet cavity 101 to inside the air inlet cavity 101 toward the direction away from the entrance of the impeller cavity 301.

[0079] Only a portion of the leading edge 1021 of the blade 102 extends from outside the air inlet cavity 101 to inside the air inlet cavity 101 in a direction away from the entrance of the impeller cavity 301. In this way, the noise reduction effect can be achieved, and at the same time, the size of the blade 102 will not be too small to affect the working efficiency of the impeller 10.

[0080] In some specific embodiments, reference may be made to Figure 3 , Figures 6 to 8As shown, the blade 102 also has a first edge 1022, a second edge 1023 and a trailing edge 1024, the first edge 1022 and the second edge 1023 are spaced apart in the axial direction of the impeller 10, the first edge 1022 is closer to the inlet of the impeller chamber 301 than the second edge 1023, and the trailing edge 1024 is located on the side of the blade 102 away from the air inlet chamber 101; the leading edge 1021 of at least one blade 102 includes a first extension portion 1025 and a second extension portion 1026, the first edge 1022 and the second extension portion 1026 are connected by the first extension portion 1025, and along the direction from the trailing edge 1024 to the second extension portion 1026, the first extension portion 1025 gradually moves away from the inlet of the impeller chamber 301.

[0081] According to some embodiments of the present invention, reference can be made to Figure 8 As shown, the angle a between the first extension portion 1025 and the extension line of the first edge 1022 is 15° to 60°. For example, the angle a between the first extension portion 1025 and the first edge 1022 can be 15°, 20°, 25°, 30°, 35°, 40°, 45°, 50°, 55°, 60°, or any value between any two values. Specifically, the angle a between the first extension portion 1025 and the extension line of the first edge 1022 can be optimized according to the actual operating state of the impeller 10, the size of the impeller 10, the rotation speed, etc., so as to achieve the best noise reduction effect.

[0082] According to some embodiments of the present invention, along the extension direction of the first edge 1022, the ratio of the size L1 of the first edge 1022 to the size L2 of the first extension portion 1025 is 2:1 to 3:1. Figure 5 As shown, for example, the size of the first edge 1022 can be set to L1, the size of the first extension portion 1025 along the extension direction of the first edge 1022 can be set to L2, and the ratio of L1 to L2 can be 2, 2.2, 2.4, 2.6, 2.8, 3, or any value between any two of them. When the ratio of L1 to L2 is within this range, the size of the first edge 1022 will not be too small to affect the installation of the blade 102, and the size of the first edge 1022 will not be too large to make the noise reduction effect poor.

[0083] In some embodiments, the angle a between the first extension portion 1025 and the extension line of the first edge 1022 is 15° to 60°, and along the extension direction of the first edge 1022, the ratio of the dimension L1 of the first edge 1022 to the dimension L2 of the first extension portion 1025 is 2:1 to 3:1. In this way, the area defined by the extension line of the first edge 1022, the extension line of the second extension portion 1026 and the first extension portion 1025 will not be too large, that is, the size of the blade 102 will not be reduced too much to significantly reduce the working efficiency of the impeller 10, and at the same time, a good noise reduction effect can be achieved.

[0084] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" 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 components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0085] In the description of this specification, the description with reference to the terms "embodiment", "specific embodiment", "example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0086] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A clothes processing device, characterized in that: The laundry processing device comprises a laundry processing chamber and an air duct chamber, wherein the laundry processing chamber comprises a first air inlet and a first air outlet, wherein the air duct chamber comprises a second air inlet and a second air outlet, wherein the second air inlet is communicated with the first air outlet, and wherein the laundry processing device comprises a fan, wherein the fan comprises a volute and an impeller, wherein the volute comprises: A volute body, wherein an inner cavity of the volute body communicates with the first air inlet and the second air outlet, and the inner cavity of the volute body comprises an impeller cavity, and the impeller is disposed in the impeller cavity; A volute tongue is located at the outlet of the impeller cavity, and the volute tongue includes a first volute tongue portion, and a contour line of the first volute tongue portion facing the outlet gradually inclines toward the outlet along the axial direction of the impeller.

2. The clothes treating device according to claim 1, characterized in that: An angle between a contour line of the first volute tongue portion facing the outlet or a tangent line of the contour line and the axis of the impeller is 15° to 45°.

3. The clothes treating device according to claim 1, characterized in that: The volute body has a first side and a second side which are arranged opposite to each other in the axial direction of the impeller, and the inlet of the impeller chamber is located at the first side; Wherein, along the axial direction of the impeller from the second side to the first side, the side of the first volute tongue portion facing the outlet gradually inclines toward the outlet.

4. The clothes treating device according to claim 3, characterized in that: The volute tongue further comprises a second volute tongue portion, wherein the second volute tongue portion and the first volute tongue portion are arranged in the axial direction of the impeller and the first volute tongue portion is arranged closer to the inlet of the impeller cavity; A contour line of the second volute tongue portion facing the outlet extends along the axial direction of the impeller, or a contour line of the second volute tongue portion facing the outlet gradually inclines toward the outlet from the second side to the first side along the axial direction of the impeller, and an inclination angle of the contour line of the second volute tongue portion is smaller than an inclination angle of the contour line of the first volute tongue portion.

5. The clothes treating device according to claim 1, characterized in that: The ratio of the axial dimension of the first volute tongue portion to the axial dimension of the impeller chamber is 0.7-1.

6. The clothes treating device according to claim 1, characterized in that: The inner cavity of the volute body also includes an air outlet cavity, which is connected between the impeller cavity and the first air inlet, and the volute tongue is located between the impeller cavity and the air outlet cavity.

7. The clothes treating device according to claim 1, characterized in that: The volute body and the volute tongue are integrally injection-molded.

8. The clothes processing device according to any one of claims 1 to 7, characterized in that: The ratio of the axial dimension of the impeller to the diameter of the impeller is 0.2 to 0.4; or, The axial dimension of the impeller is 30-40 mm, and the diameter of the impeller is 120-140 mm.

9. The clothes processing device according to any one of claims 1 to 7, characterized in that: The impeller includes a wheel disc and a plurality of blades. The plurality of blades are connected to a side of the wheel disc facing the inlet of the impeller chamber and are arranged at intervals in the circumferential direction of a circle. The blades and the wheel disc are metal parts.

10. The clothes treating device according to claim 9, characterized in that: The thickness of the blade is 0.2 mm to 0.8 mm.

11. The clothes treating device according to claim 9, characterized in that: The impeller further includes an end plate, the end plate and the wheel disc are spaced apart in the axial direction of the impeller, a plurality of blades are connected between the end plate and the wheel disc, and the end plate is a metal member.

12. The clothes treating device according to claim 9, characterized in that: The impeller has an air inlet cavity arranged opposite to the inlet of the impeller cavity, and the plurality of blades are arranged at intervals along the circumference of the air inlet cavity. The edge of the blade facing the air inlet cavity is a leading edge, and a portion of the leading edge of at least one blade extends from outside the air inlet cavity to inside the air inlet cavity in a direction away from the inlet of the impeller cavity.

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