WO2022213747A1 - 壁挂式洗涤设备 - Google Patents

壁挂式洗涤设备 Download PDF

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Publication number
WO2022213747A1
WO2022213747A1 PCT/CN2022/078920 CN2022078920W WO2022213747A1 WO 2022213747 A1 WO2022213747 A1 WO 2022213747A1 CN 2022078920 W CN2022078920 W CN 2022078920W WO 2022213747 A1 WO2022213747 A1 WO 2022213747A1
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WO
WIPO (PCT)
Prior art keywords
wall
volute
mounted washing
horizontal
washing device
Prior art date
Application number
PCT/CN2022/078920
Other languages
English (en)
French (fr)
Inventor
方相九
杨龙
李涛
冉庆
Original Assignee
青岛海尔洗衣机有限公司
海尔智家股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 青岛海尔洗衣机有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔洗衣机有限公司
Priority to JP2023559833A priority Critical patent/JP2024516935A/ja
Publication of WO2022213747A1 publication Critical patent/WO2022213747A1/zh

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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F25/00—Washing machines with receptacles, e.g. perforated, having a rotary movement, e.g. oscillatory movement, the receptacle serving both for washing and for centrifugally separating water from the laundry and having further drying means, e.g. using hot air 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/02—Domestic laundry dryers having dryer drums rotating about a horizontal axis
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00—Domestic laundry dryers
    • D06F58/20—General details of domestic laundry dryers 
    • D06F58/26—Heating arrangements, e.g. gas heating equipment
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00—Pumping installations or systems
    • F04D25/02—Units comprising pumps and their driving means
    • F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/26—Rotors specially for elastic fluids
    • F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
    • F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
    • F04D29/282—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers the leading edge of each vane being substantially parallel to the rotation axis
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/422—Discharge tongues
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226—Fan casings
    • F04D29/4233—Fan casings with volutes extending mainly in axial or radially inward direction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps

Definitions

  • the invention relates to the field of washing, in particular to a wall-mounted washing device.
  • Wall-mounted washing equipment such as a wall-mounted drum washing machine
  • Wall-mounted washing equipment has the advantages of compact structure, small footprint, low noise, and low cost, so it is favored by more and more users.
  • some wall-mounted washing equipment can be used to wash small personal clothing or infant clothing, etc., which can not only achieve lightweight clothing washing, but also prevent cross-infection of bacteria between clothing, with good economy and practicability.
  • a wall-mounted washing device with a drying function has been developed in the prior art.
  • Chinese invention patent application CN111809339A discloses a wall-mounted washing machine.
  • the wall-mounted washing machine includes an outer tub and a drying device, and the drying device is at least partially integrally formed on the side wall of the outer tub.
  • the drying device includes a first air duct and a second air duct. The first air duct is communicated with the air inlet of the outer cylinder, and dry hot air is introduced into the interior of the outer cylinder.
  • the second air duct is respectively connected with the air outlet of the outer cylinder and the first The air ducts are connected, and the hot and humid air received from the outer cylinder is condensed into dry and cold air.
  • the wall-mounted washing machine can dry clothes, and utilizes circulating air to improve drying efficiency.
  • the overall volume of the wall-mounted washing machine is small and the internal space is limited, the size of the first air duct of the wall-mounted washing machine is small, the air outlet volume is small, and the drying efficiency is not high. Therefore, there is a possibility of improvement in the wall-mounted washing machine.
  • the present invention provides a wall-mounted washing equipment, the wall-mounted washing equipment includes an outer cylinder and a fixed on the top of the outer cylinder.
  • a fan the fan comprises a volute and an impeller arranged in the volute, the volute comprises: an upper volute, and the upper volute has a first horizontal top surface, a helical curved surface and a second connected in sequence a horizontal top surface, the first horizontal top surface and the second horizontal top surface are perpendicular to the axis of the impeller, and the helical surface is configured to extend spirally upward from the first horizontal top surface to the second horizontal top surface a horizontal top surface; and a lower volute, the lower volute is butted with the upper volute to define an air passage, and the lower volute has a first horizontal bottom surface perpendicular to the axis so that the air outlet The height of the portion of the channel corresponding to the helical curved surface gradually increases along
  • an outer tub and a fan fixed on the top of the outer tub are included.
  • the fan includes a volute and an impeller arranged in the volute.
  • the volute has an upper volute and a lower volute.
  • the upper volute has a first horizontal top surface, a spiral curved surface and a second horizontal top surface which are connected in sequence.
  • the first horizontal top surface and the second horizontal top surface are perpendicular to the axis of the impeller, and the helical curved surface is configured to extend spirally upward from the first horizontal top surface to the second horizontal top surface.
  • the lower volute is butted with the upper volute to define an air passage, so as to facilitate the delivery of drying air into the outer cylinder.
  • the lower volute has a first horizontal bottom surface perpendicular to the axis of the impeller.
  • the first horizontal bottom surface and the first horizontal top surface are parallel to each other, so the height of the part of the air outlet channel corresponding to the first horizontal top surface is constant.
  • the helical curved surface extends spirally upward from the first horizontal top surface to the second horizontal top surface. Therefore, the height of the portion of the air outlet channel corresponding to the helical curved surface gradually increases along the extending direction of the helical curved surface. It can be understood that, compared with the simple horizontal surface design, the wall-mounted washing device of the present invention configures the upper volute into the first horizontal top surface, the spiral curved surface and the second horizontal top surface which are connected in sequence, so that the air outlet channel is formed.
  • the height of the portion corresponding to the helical surface gradually increases.
  • the second horizontal top surface is set higher than the first horizontal top surface, and the height of the part of the air outlet channel corresponding to the second horizontal top surface also increases accordingly, so the overall space of the air outlet channel increases, and the air passes through the outlet.
  • the kinetic energy loss in the air passage is reduced, and the air output of the fan is increased.
  • the section of the air outlet channel also increases gradually, and the flow velocity of the air when passing through the air outlet channel gradually decreases.
  • the design of the helical surface makes the air outlet channel have a better guiding effect, the wind resistance is reduced, and the air outlet volume of the fan is further increased.
  • a certain installation space is usually reserved between the top of the volute and the shell of the wall-mounted washing device, so the spiral surface and the second level with a height difference from the first horizontal top surface are arranged on the upper volute. The top surface can make full use of the above reserved space, so that the structure of the wall-mounted washing equipment is more compact and the space utilization rate is higher.
  • the fan further includes a volute tongue
  • the shortest connecting line length from the center of the impeller to the volute tongue is L 1
  • the radius of the impeller is R
  • L 1 (1.05-1.2) ⁇ R.
  • the design of the volute tongue can prevent part of the air from circulating in the volute and improve the air outlet efficiency of the fan.
  • a part of the outer contour of the projection plane of the volute perpendicular to the axis is an involute, and the range of the maximum wrap angle ⁇ of the involute is 250° -300°.
  • the air gets kinetic energy driven by the fan, and is thrown out under the centrifugal action of the fan.
  • the section of the air outlet channel can be gradually increased, the flow speed of the air in the air outlet channel can be gradually reduced, and part of the kinetic energy can be converted into static pressure energy. Thereby reducing energy loss.
  • the range of the maximum wrap angle ⁇ of the involute is 250°-300°, so as to obtain good fan performance and improve the efficiency of the fan.
  • the involute has n baselines, wherein the first baseline l1 is the shortest connecting line from the center of the impeller to the volute tongue and has the shortest connecting line
  • the range of the angle ⁇ is 20°-30°
  • n is an integer greater than or equal to 3.
  • the lower volute further includes an oblique curved surface and a second horizontal bottom surface, the second horizontal bottom surface is parallel to the second horizontal top surface, and the second horizontal bottom surface is parallel to the second horizontal top surface.
  • the bottom surface is higher than the first horizontal bottom surface in the direction of the axis, the oblique curved surface is configured to extend obliquely upward from the first horizontal bottom surface to the second horizontal bottom surface, and the oblique curved surface is connected to the second horizontal bottom surface.
  • the top of the outer cylinder is fitted with the arc-shaped wall.
  • An oblique curved surface is arranged on the lower volute, and the oblique curved surface is configured to fit with the arc-shaped wall at the top of the outer cylinder, so that the volute can better fit on the outer cylinder, thereby improving the internal space of the wall-mounted washing device utilization.
  • the design of the oblique curved surface gradually reduces the cross-section of the air outlet channel, so that part of the static pressure energy is converted into kinetic energy, and the air velocity increases when passing through the air outlet channel corresponding to the oblique curved surface, thereby improving the air outlet efficiency.
  • the extending direction of the spiral curved surface is clockwise or counterclockwise, and the second horizontal top surface and the second horizontal bottom surface face the front end of the outer cylinder direction extension.
  • the extension direction of the helical surface can be configured to be clockwise or counterclockwise, so as to enrich the types of products and meet the different needs of users.
  • the second horizontal top surface and the second horizontal bottom surface are arranged to extend toward the front end of the outer cylinder, which can conveniently transport the drying air in the air outlet channel into the outer cylinder.
  • the impeller has a plurality of blades that are evenly spaced around the axis, and the blade outlet placement angle of each of the blades has the same predetermined angle ⁇ , and the predetermined angle ⁇
  • the range is 145°-155°.
  • the impeller is provided with a plurality of blades evenly spaced around the axis, so that the air flow between the blades is driven by driving the impeller to rotate.
  • the blade outlet placement angle of each blade is set to the same angle, which can make the force on the blade more uniform, thereby making the airflow generated by the rotation of the impeller more stable, and prolonging the service life of the impeller.
  • the blade outlet placement angle is set to 145°-155°, that is, the impeller adopts a forward impeller (the blade outlet placement angle is greater than 90°), which can obtain a higher pressure head, and can be The output power, the size of the blades, the number of blades, the spacing of the blades, etc. are the same) to obtain a greater air flow.
  • the blade outlet placement angle is set to 145°-155°, so that the inclination angle of the blade of the forward impeller is moderate, which can avoid the deformation of the blade due to the excessive inclination angle caused by the excessive pressure head, and also prevent the inclination angle from being too large. Small causes the pressure head to be too small and affects the air flow
  • a fan air intake port is formed in the center of the first horizontal bottom surface, and the end of the second horizontal top surface and the second horizontal bottom surface defines a fan air outlet port
  • the wall-mounted washing equipment further includes: an air supply duct, which is respectively connected with the air outlet of the fan and the air inlet of the outer cylinder; and a return air duct, the return air duct is
  • the air duct has a bottom inlet and a top outlet, the bottom inlet is coincident with the air outlet of the outer cylinder, and the top outlet is configured to be butted with the air suction port of the fan.
  • a heating component is provided in the volute and at a position close to the air outlet of the fan.
  • a heating component is arranged in the volute near the air outlet of the fan, so that the air can be heated and converted into dry hot drying air when passing through the heating component, and the drying air will be transported to the wall-mounted washing equipment to be taken away for drying. Moisture in clothes, so as to achieve the purpose of drying clothes.
  • FIG. 1 is a perspective view of an embodiment of a wall-mounted washing device of the present invention
  • FIG. 2 is a perspective view of an embodiment of a partial structure of the wall-mounted washing device of the present invention
  • FIG. 3 is a schematic top view of an embodiment of a partial structure of the wall-mounted washing apparatus of the present invention shown in FIG. 2;
  • Fig. 4 is the perspective view of the embodiment of the fan of the wall-mounted washing equipment of the present invention.
  • FIG. 5 is a perspective view of an embodiment of a volute of a wall-mounted washing device of the present invention.
  • Fig. 6 is the structural representation of the embodiment inside the volute of the wall-mounted washing device of the present invention.
  • Fig. 7 is a partial enlarged view of part A of the embodiment of the interior of the volute of the wall-mounted washing device of the present invention shown in Fig. 6;
  • Fig. 8 is the structural representation of the embodiment of the lower volute of the wall-mounted washing device of the present invention.
  • FIG. 9 is a schematic diagram of an embodiment of the outline of the volute of the wall-mounted washing apparatus of the present invention.
  • connection should be understood in a broad sense, for example, it may be a fixed connection, or a It is a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can also be the internal communication of two components.
  • connection should be understood in a broad sense, for example, it may be a fixed connection, or a It is a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can also be the internal communication of two components.
  • the present invention provides a wall-mounted washing equipment 1 .
  • the wall-mounted washing device 1 includes an outer tub 10 and a fan 20 fixed on the top 121 of the outer tub 10.
  • the fan 20 includes a volute 21 and an impeller 22 arranged in the volute 21.
  • the volute 21 includes: an upper volute 211,
  • the upper volute 211 has a first horizontal top surface 2111, a helical curved surface 2112 and a second horizontal top surface 2113 connected in sequence.
  • the first horizontal top surface 2111 and the second horizontal top surface 2113 are perpendicular to the axis C of the impeller 22, and the helical curved surface 2112 is configured to extend spirally upward from the first horizontal top surface 2111 to the second horizontal top surface 2113; and the lower volute 212, the lower volute 212 butts with the upper volute 211 to define the air passage 213, and the lower volute 212
  • the first horizontal bottom surface 2121 is perpendicular to the axis C, so that the height of the portion of the air outlet channel 213 corresponding to the helical curved surface 2112 gradually increases along the extending direction of the helical curved surface 2112 .
  • the installation space reserved on the top of the wall-mounted washing device 1 is fully utilized, so that the overall space of the air outlet channel 213 of the wall-mounted washing device 1 becomes larger, and the air outlet channel 213 corresponds to the spiral curved surface.
  • the section of the part 2112 gradually increases along the extension direction of the helical curved surface 2112, and the wind resistance decreases, so the air output of the fan increases.
  • the wrap angle refers to the angle between any two points on the involute part of the outer contour of the volute and the line connecting the center of the base circle;
  • the maximum wrap angle refers to the angle between the starting and ending points of the involute in the outer contour of the volute and the line connecting the center of the base circle;
  • fitting refers to the shape of two associated elements or objects that converge to each other and They are separated by a predetermined distance and are approximately parallel;
  • blade outlet placement angle refers to the angle between the tangent of the blade at the outer diameter of the impeller and the circumferential direction.
  • FIG. 1 is a perspective view of an embodiment of a wall-mounted washing device of the present invention
  • Fig. 2 is a perspective view of an embodiment of a partial structure of the wall-mounted washing device of the present invention
  • Fig. 3 is a part of the wall-mounted washing device of the present invention shown in Fig. 2
  • Figure 4 is a schematic perspective view of an embodiment of a fan of a wall-mounted washing device of the present invention
  • Figure 5 is a schematic perspective view of an embodiment of a volute of the wall-mounted washing device of the present invention
  • Figure 6 is a schematic view of the present invention Schematic diagram of the structure of the embodiment inside the volute of the wall-mounted washing device;
  • FIG. 1 is a perspective view of an embodiment of a wall-mounted washing device of the present invention
  • Fig. 2 is a perspective view of an embodiment of a partial structure of the wall-mounted washing device of the present invention
  • Fig. 3 is a part of the wall-mounted washing device of the present invention shown in Fig. 2
  • FIG. 7 is a partial enlarged view of part A of the embodiment of the interior of the volute of the wall-mounted washing device of the present invention shown in FIG. 6 ;
  • FIG. 8 is the wall-mounted washing device of the present invention.
  • FIG. 9 is a schematic diagram of the embodiment of the outline of the volute of the wall-mounted washing apparatus of the present invention.
  • the wall-mounted washing apparatus 1 is a wall-mounted drum washing machine.
  • the wall-mounted washing apparatus 1 may also be a wall-mounted dryer or other suitable form of washing apparatus.
  • the wall-mounted washing device 1 includes components such as an outer cylinder 10, an inner cylinder (not shown in the figure), a fan 20, an air supply air duct 30 and a return air duct 40, so that the wall-mounted washing device 1 has but is not limited to washing , rinsing, dehydrating and drying functions.
  • the outer cylinder 10 includes a back plate 11 , a cylinder body 12 , an outer cylinder cover 13 and an observation window 15 .
  • the barrel 12 has a front end 123 and an opposite rear end 124 .
  • the rear end 124 of the cylinder body 12 is fixed with the front side of the back plate 11
  • the outer cylinder cover 13 covers the front end 123 of the cylinder body 12
  • the observation window 15 is fixed on the outer cylinder cover 13 .
  • the back plate 11 is substantially flat. Installation holes (not shown in the figure) are respectively arranged on the four diagonal corners of the back plate 11 .
  • the mounting holes can be matched with mounting pieces (not shown in the figure), so that the wall-mounted washing device 1 can be fixed on a predetermined wall by means of the back plate 11 .
  • the drum body 12 is a substantially cylindrical cavity for defining a space for accommodating an inner drum for washing clothes or other laundry items.
  • the back plate 11 and the barrel 12 can be integrally formed by injection molding of PP, ABS or other suitable resin materials.
  • the backing plate 11 and the barrel 12 can also be made separately and then fixed together.
  • the fixing method can be fusion welding, screw fixing, bolt fixing or other suitable fixing methods.
  • the outer cylinder cover 13 can be integrally formed by injection molding using PP, ABS or other suitable resin materials.
  • the outer cylinder cover 13 may be fixed on the cylinder body 12 by means including but not limited to deposition welding, screws, and bolts.
  • the outer cylinder cover 13 is formed with an annular wall 131 extending vertically outward around the central axis of the cylinder body 12 to define a substantially circular opening 14 .
  • an outer cylinder air inlet 1311 is formed on the top of the annular wall 131 so as to be connected with the air supply duct 30 , so that the air inlet 1311 can be transported into the cylinder body 12 for Hot, dry air for drying clothes or other items.
  • the outer cylinder air inlet 1311 is configured to be substantially rectangular with rounded corners.
  • the outer cylinder air inlet 1311 can also be provided in other suitable shapes, such as trapezoid, ellipse, and the like.
  • a window pad 132 is disposed inside the annular wall 131 .
  • the window pad 132 includes a substantially annular window pad body 1321 and a hollow connecting portion 1322 extending vertically outward from the window pad body 1321 in a radial direction thereof.
  • the connecting portion 1322 passes through the outer cylinder air inlet 1311 so as to be butted with the air supply air duct 30 .
  • the window pad 132 can be integrally formed by an injection molding process using a suitable material such as rubber. As shown in FIG.
  • the viewing window 15 is pivotally connected to the outer cylinder cover 13 .
  • the viewing window 15 is configured to close the opening 14 .
  • the observation window 15 can be made of ABS, tempered glass or other suitable materials.
  • the observation window 15 has a certain degree of transparency, so that the washing condition of the laundry to be washed in the inner tub can be observed through the observation window 15 .
  • the fan 20 is disposed at the top 121 of the barrel 12 and close to the right side of the barrel 12 .
  • the fan 20 may also be arranged at the top 121 of the barrel 12 and close to the left side of the barrel 12 .
  • the fan 20 includes a volute 21 , an impeller 22 (shown in FIG. 7 ) arranged in the volute 21 , and a motor (not shown in the figure).
  • the motor shaft of the motor is fixed on the impeller 22, and the motor is electrically connected with the controller (not shown in the figure) of the wall-mounted washing apparatus 1, so that the impeller 22 can be driven to rotate by controlling the power-on and power-off of the motor.
  • Motors include, but are not limited to, stepper motors, brushless motors, servo motors, or other suitable forms of motors.
  • the volute 21 includes an upper volute 211 and a lower volute 212 .
  • the upper volute 211 and the lower volute 212 are butted against each other to define an air outlet channel 213 .
  • the upper volute 211 can be integrally formed by injection molding from PP, ABS or other suitable resin materials, so as to simplify the manufacturing process.
  • the upper volute 211 has a first horizontal top surface 2111 , a spiral curved surface 2112 and a second horizontal top surface 2113 which are connected in sequence. Based on the orientation shown in FIG. 4 , the first horizontal top surface 2111 extends substantially in the horizontal direction. As shown in FIG.
  • a motor mounting groove 21111 recessed inward is formed on the first horizontal top surface 2111 .
  • the motor mounting slot 21111 is configured to accommodate the motor so that the motor can be fixed in the motor mounting slot 21111 .
  • the motor shaft of the motor extends from the motor installation slot 21111 to the inside of the volute 21 and forms a fixed connection with the impeller 22 (as shown in FIG. 6 ).
  • the fixing methods of the motor shaft and the impeller 22 include but are not limited to screw fixing, bolt fixing, rivet fixing and the like.
  • the impeller 22 is arranged just below the first horizontal top surface 2111 , that is, the first horizontal top surface 2111 is substantially perpendicular to the axis C of the impeller 22 .
  • the spiral curved surface 2112 extends from the first horizontal top surface 2111 to the second horizontal top surface 2113 in a counterclockwise direction.
  • the helical curve 2112 can also be configured to extend from the first horizontal top surface 2111 to the second horizontal top surface 2113 in a clockwise direction (in this case, the volute 21 is arranged on the top 121 of the barrel 12 and near the left side of the barrel 12).
  • the second horizontal top surface 2113 extends from the end of the helical curved surface 2112 in a direction perpendicular to the axis C of the impeller 22 .
  • the volute 21 is fixed on the top 121 of the cylinder body 12
  • the second horizontal top surface 2113 faces the front end of the outer cylinder 10 .
  • the difference H can not only meet the requirement of increasing the overall space of the air outlet channel 213, but also avoid the height difference H being too large and taking up too much space.
  • the lower volute 212 is configured to interface with the upper volute 211 .
  • the lower volute 212 and the upper volute 211 may be fixed by fusion welding, screw fixing, bolt fixing or other suitable methods.
  • the lower volute 212 can also be integrally formed by injection molding from PP, ABS or other suitable resin materials, so as to simplify the manufacturing process.
  • the lower volute 212 has a first horizontal bottom surface 2121 , an oblique curved surface 2122 and a second horizontal bottom surface 2123 which are connected in sequence.
  • the first horizontal bottom surface 2121 extends in a direction perpendicular to the axis C of the impeller 22 .
  • a fan suction port 215 is formed on the first horizontal bottom surface 2121 .
  • the fan suction port 215 is arranged just below the impeller 22 , so that when the impeller 22 rotates, air can be sucked from the fan suction port 215 and pushed into the air outlet channel 213 , and then pushed to flow outward along the air outlet channel 213 .
  • the fan suction port 215 is configured in a substantially circular shape and has a diameter smaller than the outer diameter of the impeller 22 .
  • the oblique curved surface 2122 extends obliquely upward from the first horizontal bottom surface 2121 to the second horizontal bottom surface 2123 . Based on the orientation shown in FIG.
  • the oblique curved surface 2122 is arranged to extend to the upper left.
  • the oblique curved surface 2122 may also be arranged to extend upward to the right (in this case, the volute 21 is arranged at the top 121 of the barrel 12 and close to the left side of the barrel 12 ).
  • the oblique curved surface 2122 is arranged to fit with the arc-shaped wall of the top 121 of the outer cylinder 10, so that the volute 21 can fit more closely with the top 121 of the outer cylinder 10.
  • the wall-mounted The structure of the washing apparatus 1 is more compact. As shown in FIGS.
  • the second horizontal bottom surface 2123 extends from the end of the oblique curved surface 2122 in a direction perpendicular to the axis C of the impeller 22 , and the second horizontal bottom surface 2123 is higher than the second horizontal bottom surface 2123 along the axis C of the impeller 22 .
  • the second horizontal bottom surface 2123 faces the front end of the outer cylinder 10 .
  • the ends of the second horizontal bottom surface 2123 and the second horizontal top surface 2113 (near the front end of the outer cylinder 10 ) define the fan exhaust port 216 .
  • the fan air outlet 216 is configured to be connected with the air supply air duct 30 , so as to deliver the hot and dry air generated by the fan 20 into the outer cylinder 10 .
  • a volute tongue 214 is also formed in the volute 21 .
  • the volute tongue 214 is arranged at a position where the first horizontal bottom surface 2121 and the inner side of the oblique curved surface 2122 meet, and extends in a direction perpendicular to the first horizontal bottom surface 2121 .
  • the provision of the volute tongue 214 can prevent part of the air from circulating in the volute 21, so as to improve the air supply efficiency of the fan 20 and reduce the noise.
  • the curvature of the volute tongue 214 can be obtained experimentally or empirically, so that the air passing through the surface of the volute tongue 214 makes less noise.
  • the involute has 13 baselines, namely a first baseline l 1 , a second baseline I 2 , ..., a twelfth baseline I 12 and a thirteenth baseline I 13 .
  • the first base line 11 is set as the shortest connecting line from the center O of the impeller 22 to the volute tongue 214 .
  • the range of the maximum wrap angle ⁇ of the involute is 250°-300°, that is, the first base line l 1 and the thirteenth base line l 13 are clamped with respect to the center O of the impeller 22
  • the range of the angle ⁇ is 250°-300°.
  • the length L 1 of the first base line l 1 that is, the shortest connecting line length from the center O of the impeller 22 to the volute tongue 214 is L 1 .
  • the ratio of the length of each baseline to the length of the adjacent baseline is the same, for example, 1.05, or other suitable ratios greater or less than 1.05.
  • the second base line l 2 and the first base line l 1 are sandwiched by a predetermined angle ⁇ .
  • the same predetermined angle ⁇ is also held between every two adjacent baselines among the third baseline l 3 , the fourth baseline l 4 , . .
  • the twelfth baseline l 12 and the thirteenth baseline l 13 .
  • the number of baselines may be configured to be more or less than 13 other suitable numbers, such as 9, 15, etc.
  • the starting point of the involute is the end point opposite to the center O of the circle on the first baseline l 1
  • the end of the involute is the end point opposite the center O of the nth baseline 1 n
  • the involute passes through each
  • the end points on the baseline opposite to the circle center O are formed by fitting the above discrete end points into a curve to form an arc-shaped involute.
  • the "fitting" referred to here refers to establishing a data relationship or a data model for a given discrete data point through a curve fitting method, so as to form a smooth curve.
  • the volute 21 defines an air outlet channel 213 . Since part of the outer contour line of the volute 21 is configured as an involute, the cross section of the air outlet passage 213 in the radial direction (ie, the direction perpendicular to the axis C of the impeller 22) along the air outlet direction gradually increases, and the air passes through the air outlet. The flow velocity of the air outlet passage 213 is correspondingly reduced, and part of the kinetic energy is converted into static pressure energy.
  • the helical curved surface 2112 on the upper volute 211 is configured to extend spirally from the first horizontal top surface 2111 to the second horizontal top surface 2113, so that the air outlet channel 213 corresponds to the helical curved surface 2112 in the axial direction (ie, parallel to The height in the direction of the axis C of the impeller 22) gradually increases along the extension direction of the helical curved surface 2112, the section of the air outlet channel 213 also increases gradually, and the flow velocity of the air passing through the air outlet channel 213 gradually increases accordingly. decreases, and part of the kinetic energy is further converted into static pressure energy.
  • the impeller 22 is integrally formed by injection molding using PP, PPS, or other suitable resin materials, so as to simplify the manufacturing process.
  • the impeller 22 has a substantially circular shape.
  • the clearance between the volute tongue 214 and the outer diameter of the impeller 22 is moderate, so as to prevent the clearance from being too large to reduce the efficiency of the fan 20, and to prevent the clearance from being too small to generate loud noise.
  • the impeller 22 has a plurality of blades 221 evenly spaced around its axis C. It can be understood that, the number of blades 221 and the spacing between adjacent blades 221 can be adjusted according to actual needs.
  • the impeller 22 is arranged as a forward-facing impeller (ie, the blade exit angle is greater than 90°).
  • the impeller 22 is arranged so that the forward impeller can achieve a higher head and a higher air flow under the same conditions (ie the output power of the motor, the size of the blades, the number of blades, the spacing of the blades, etc. are the same).
  • the impeller 22 can also be arranged as a radial impeller or as a rearward facing impeller. As shown in FIG.
  • the placement angle of the blade outlet of each blade 221 is configured to the same predetermined angle ⁇ , so that the force on each blade 221 is more uniform, which can not only make the airflow generated when the impeller 22 rotates more stable, but also extend the impeller. 22 service life.
  • the range of the predetermined angle ⁇ is 145°-155° in order to obtain a moderate blade outlet placement angle, so as to avoid the deformation of the blade due to the excessive inclination angle caused by the excessive indentation angle, and also to prevent the influence of the indentation head caused by too small inclination angle. air flow.
  • a heating component 23 is provided in the volute 21 and at a position close to the air outlet 216 of the fan.
  • the heating part 23 can heat the air generated by the fan 20 and convert it into dry hot drying air.
  • the heating part 23 includes a heater that can convert electrical energy into thermal energy.
  • the heater can be a heating tube, a heating wire, a heating sheet or other suitable components.
  • the heating part 23 further includes a temperature control switch (not shown in the figure) for controlling the temperature of the heater, and the heater is electrically connected to the control system of the wall-mounted washing apparatus 1 through the temperature control switch, so that when the heater is overheated Automatically control the heater to cut off.
  • the air supply air duct 30 includes a first end 31 connected to the fan air outlet 216 of the volute 21 , and a second end 31 connected to the outer cylinder air inlet 1311 . end 32.
  • the air supply duct 30 includes an upper air supply air duct shell part and a lower air supply air duct shell part (not shown in the figure), and the upper air supply air duct shell part and the upper scroll
  • the casing 211 , the lower air duct casing and the lower volute 212 are integrally formed by an injection molding process, so that when the air passes through the first end 31 , the air resistance will not increase due to the installation gap and affect the air supply efficiency.
  • the second end 32 of the supply air duct 30 has a rectangular and rounded section. Alternatively, the second end 32 may also be provided with other suitable cross-sections, such as trapezoidal, elliptical, and the like.
  • the second end 32 of the air supply air duct 30 is configured to be inserted into the connecting portion 1322 of the window gasket 132 and extend into the outer cylinder air inlet 1311 , so that the air supply air duct 30 can be effectively sealed with the outer cylinder air inlet 1311 , to prevent the drying air from flowing out of the installation gap, affecting the drying efficiency and generating noise.
  • the return air duct 40 includes an air duct body 41 and an air duct cover 42 .
  • the return air duct 40 is configured to convert the hot and humid air in the outer cylinder 10 into cold dry air and condensed water. Based on the orientation shown in FIG. 1 , the return air duct 40 is arranged on the right side of the cylindrical body 12 and extends in the vertical direction. Alternatively, the return air duct 40 may also be arranged on the left side of the barrel 12 and extend in the vertical direction (in this case, the volute 21 is arranged on the top 121 of the barrel 12 and close to the left side of the barrel 12 ).
  • the air duct main body 41 is configured to be integrated with the side wall 122 on the right side of the cylinder body 12 and extend in the vertical direction, so that the structure of the entire wall-mounted washing apparatus 1 is more compact. Based on the orientation shown in FIG. 1 , the air duct main body 41 includes a partially arcuate wall 411 formed on the right side wall 122 of the cylindrical body 12 , and an inverted L-shape extending to the right from the edge of the arcuate wall 411 in a substantially horizontal direction. A peripheral wall 412 , and a top wall 413 formed on top of the inverted L-shaped peripheral wall 412 . A bottom inlet 4111 is provided at a position near the bottom of the arcuate wall 411 .
  • the bottom inlet 4111 coincides with the outer cylinder air outlet 1221 .
  • a top outlet 4131 is provided on the top wall 413 .
  • the top outlet 4131 is configured to be docked with the fan suction port 215 .
  • the inverted L-shaped peripheral wall 412 and the top wall 413 define a lateral opening 414 extending generally in the vertical direction.
  • the air duct cover 42 is configured to be detachably secured to the side opening 414 and to close the side opening 414 .
  • the arrangement of the air duct cover 42 and the lateral opening 414 can meet the technological requirements of the integral molding of the air duct main body 41 and the outer cylinder 10 .
  • the fixing methods of the air duct cover 42 and the air duct main body 41 include but are not limited to screw connection, bolt connection or rivet connection, so that the user can disassemble the air duct cover 42 and easily perform the operation on the inside of the return air duct 40 from the side opening 414. clean.
  • a seal (not shown in the figure) is further configured between the air duct cover 42 and the side opening 414, so that the air duct cover 42 can effectively seal the air duct body 41 and prevent air from flowing out of the installation gap.
  • the return air duct 40 is further provided with a condensation component (not shown in the figure).
  • the condensing assembly is arranged at a suitable position in the return air duct 40 , for example, near the upper part of the bottom inlet 4111 , so as to condense the hot and humid air flowing in from the bottom inlet 4111 .
  • the condensing assembly has a condenser (not shown in the figure), and the condenser may adopt a tube-fin condenser, a tube-belt condenser, or other suitable condensing components.
  • the hot and humid air in the cylinder 12 flows into the return air duct 40 through the outer cylinder air outlet 1221 (ie, the bottom inlet 4111), and is converted into dry and cold air and condensed water after passing through the surface of the condenser.
  • a condensation spray device eg, a cold water spray device
  • the rotation of the impeller 22 causes a negative pressure to be formed in the return air duct 40 below the air suction port 215 of the fan, thereby sucking dry cold air into the volute 21 to form an air circulation.
  • the condensed water flows along the inner wall of the return air duct 40 extending in the vertical direction, from the bottom inlet 4111 located at the lower part of the return air duct 40 to the inside of the cylinder 12, and flows from the bottom of the cylinder 12 along the bottom of the cylinder 12.
  • the wall is discharged from the cylinder body 12 from the water outlet (not shown in the figure) to prevent the condensed water from staying in the return air duct 40 to breed bacteria and produce peculiar smell.

Abstract

一种壁挂式洗涤设备。该壁挂式洗涤设备（1）包括外筒（10）和固定在外筒（10）的顶部（121）上的风机（20），风机（20）的蜗壳（21）包括：上蜗壳（211），上蜗壳（211）具有依次相接的第一水平顶面（2111）、螺旋曲面（2112）和第二水平顶面（2113）；和下蜗壳（212），下蜗壳（212）具有第一水平底面（2121），出风通道（213）对应于螺旋曲面（2112）的部分的高度沿着螺旋曲面（2112）的延伸方向逐渐增加。通过在上蜗壳上布置螺旋上升的螺旋曲面，使得该壁挂式洗涤设备的出风量增大。

Description

壁挂式洗涤设备 技术领域
本发明涉及洗涤领域，具体地涉及一种壁挂式洗涤设备。
背景技术
随着人们生活水平的提高，个性化家用电器不断涌现。壁挂式洗涤设备(例如壁挂式滚筒洗衣机)具有结构紧凑、占用空间小、噪音低、造价便宜等优点，因此受到越来越多用户的青睐。例如，部分壁挂式洗涤设备可用来清洗小件贴身衣物或者婴幼儿衣物等，不仅能够实现轻量级衣物洗涤，而且可防止衣物间细菌的交叉感染，具有良好的经济性和实用性。
普通的壁挂式洗涤设备只具有洗涤、漂洗和脱水的功能。为了赋予其更多的功能以满足用户的多样化需要，现有技术中已经发展出一种兼具烘干功能的壁挂式洗涤设备。例如，中国发明专利申请CN111809339A公布了一种壁挂式洗衣机。该壁挂式洗衣机包括外筒和干燥装置，干燥装置至少部分一体成型在外筒的侧壁上。干燥装置包括第一风道和第二风道，第一风道与外筒的进风口连通，向外筒的内部通入干热空气，第二风道分别与外筒的出风口和第一风道连通，将从外筒接收的湿热空气冷凝为干冷空气。该壁挂式洗衣机能够烘干衣物，并且利用循环空气，提高了烘干效率。但是，由于壁挂式洗衣机的整体体积较小，内部空间有限，导致该壁挂式洗衣机的第一风道的尺寸较小，出风量较小，烘干效率不高。因此，该壁挂式洗衣机存在改进的可能性。
相应地，本领域需要一种新的技术方案来解决上述问题。
发明内容
为了解决现有技术中壁挂式洗涤设备的风机出风量较小的技术问题，本发明提供一种壁挂式洗涤设备，所述壁挂式洗涤设备包括外筒和固定在所述外筒的顶部上的风机，所述风机包括蜗壳和布置在所述蜗壳内的叶轮，所述蜗壳包括：上蜗壳，所述上蜗壳具有依次相接的第一水平顶面、螺旋曲面和第二水平顶面，所述第一水平顶面和所述第二水平顶面垂直于所述 叶轮的轴线，所述螺旋曲面配置成从所述第一水平顶面螺旋上升地延伸到所述第二水平顶面；和下蜗壳，所述下蜗壳与所述上蜗壳对接以限定出风通道，并且所述下蜗壳具有垂直于所述轴线的第一水平底面，使得所述出风通道对应于所述螺旋曲面的部分的高度沿着所述螺旋曲面的延伸方向逐渐增加。
本领域技术人员能够理解的是，在本发明的壁挂式洗涤设备中，包括外筒和固定在外筒的顶部上的风机。风机包括蜗壳和布置在蜗壳内的叶轮。蜗壳具有上蜗壳和下蜗壳。上蜗壳具有依次相接的第一水平顶面、螺旋曲面和第二水平顶面。第一水平顶面和第二水平顶面垂直于叶轮的轴线，螺旋曲面配置成从第一水平顶面螺旋上升地延伸到第二水平顶面上。下蜗壳与上蜗壳对接以限定出风通道，以便于向外筒内输送烘干空气。下蜗壳具有垂直于叶轮轴线的第一水平底面。第一水平底面与第一水平顶面相互平行，因此，出风通道对应于第一水平顶面的部分的高度不变。螺旋曲面从第一水平顶面螺旋上升地延伸到第二水平顶面上，因此，出风通道对应于螺旋曲面的部分的高度沿着螺旋曲面的延伸方向逐渐增加。可以理解的是，相较于单纯的水平面设计，本发明的壁挂式洗涤设备通过将上蜗壳配置成依次相接的第一水平顶面、螺旋曲面和第二水平顶面，使得出风通道对应于螺旋曲面的部分的高度逐渐增加。同时，第二水平顶面设置成高于第一水平顶面，出风通道对应于第二水平顶面的部分的高度也相应地增加，因此出风通道的整体空间增大，空气在经过出风通道时的动能损耗减小，风机的出风量增加。进一步地，由于出风通道对应于螺旋曲面的部分的高度沿着螺旋曲面的延伸方向逐渐增加，使得该段出风通道的截面也逐渐增加，空气在经过该处出风通道时的流速逐渐减小，部分动能转化为静压能，提高了该段出风通道的传输效率，使风机的整体出风量相应增加。更进一步地，螺旋曲面的设计使得出风通道具有更好地导流作用，风阻减小，风机的出风量进一步增加。另外，蜗壳顶部和壁挂式洗涤设备的壳体之间通常会预留一定的安装空间，因此在上蜗壳上布置螺旋上升的螺旋曲面和与第一水平顶面存在高度差的第二水平顶面，能够充分利用上述预留空间，使得壁挂式洗涤设备的结构更加紧凑，空间利用率更高。
在上述壁挂式洗涤设备的优选技术方案中，所述风机还包括蜗舌，所述叶轮的圆心到所述蜗舌的最短连线长度为L 1，所述叶轮的半径为R，并且L 1＝(1.05-1.2)×R。蜗舌的设计可以防止部分空气在蜗壳内循环流动， 提高风机的出风效率。进一步地，叶轮的圆心到蜗舌的最短连线长度L 1与叶轮的半径R满足L 1＝(1.05-1.2)×R，使得蜗舌到叶轮外径的间隙不会太大也不会太小，可以防止间隙太大导致风机效率下降，也可以防止间隙太小产生较大噪音。
在上述壁挂式洗涤设备的优选技术方案中，所述蜗壳的垂直于所述轴线的投影面的部分外轮廓线为渐开线，所述渐开线的最大包角α的范围为250°-300°。空气在风机的带动下获得动能，并在风机的离心作用下被甩出。通过将蜗壳的投影面的部分外轮廓线设置成渐开线，可以使出风通道的截面逐渐增大，空气在出风通道内的流动速度逐渐减小，部分动能转化为静压能，从而减少了能量损失。另外，渐开线的最大包角α的范围为250°-300°，以获得良好的风机性能，提高风机的效率。
在上述壁挂式洗涤设备的优选技术方案中，所述渐开线具有n个基线，其中，第一基线l 1为从所述叶轮的圆心到所述蜗舌的最短连线并具有最短连线长度L 1，每个所述基线的长度满足L n＝(1.02-1.1)×L (n-1)，并且每两个相邻的所述基线之间形成预定夹角β，所述预定夹角β的范围为20°-30°，n为大于等于3的整数。通过上述的配置，使得蜗壳的轮廓线配置成光滑的曲线而不存在拐点，空气在蜗壳内流动时风阻较小，相应地风机效率提高，出风量增大。
在上述壁挂式洗涤设备的优选技术方案中，所述第二水平顶面和所述第一水平顶面在所述轴线的方向上的高度差H满足H＝(0.2-0.6)×R。通过上述的配置，使得第二水平顶面和第一水平顶面在叶轮的轴线方向上的高度差适中，能够满足出风通道的整体空间增加的同时，也可防止高度差太大导致占用过多的壁挂式洗涤设备的内部空间。
在上述壁挂式洗涤设备的优选技术方案中，所述下蜗壳还包括斜向曲面和第二水平底面，所述第二水平底面平行于所述第二水平顶面，并且所述第二水平底面在所述轴线的方向上高于所述第一水平底面，所述斜向曲面配置成从所述第一水平底面倾斜向上地延伸到所述第二水平底面，并且所述斜向曲面与所述外筒的顶部的弧形壁相拟合。在下蜗壳上设置斜向曲面，并且将斜向曲面配置成与外筒顶部的弧形壁相拟合，使得蜗壳能够更好地贴合在外筒上，从而提高壁挂式洗涤设备的内部空间利用率。另外，斜向曲面 的设计使得出风通道的截面逐渐减小，使得部分静压能又转化为动能，空气在经过对应斜向曲面的出风通道时流速增加，从而提高了出风效率。
在上述壁挂式洗涤设备的优选技术方案中，所述螺旋曲面的延伸方向为顺时针方向或者逆时针方向，并且所述第二水平顶面和所述第二水平底面朝向所述外筒的前端方向延伸。螺旋曲面的延伸方向可以配置成为顺时针方向或者逆时针方向，从而丰富产品的类型，满足用户的不同需要。另外，第二水平顶面和第二水平底面布置成朝向外筒的前端方向延伸，可以方便地将出风通道内的烘干空气输送到外筒内。
在上述壁挂式洗涤设备的优选技术方案中，所述叶轮具有围绕所述轴线均匀间隔布置的多个叶片，每个所述叶片的叶片出口安放角具有相同的预定角度γ，所述预定角度γ的范围为145°-155°。在叶轮上设置围绕轴线均匀间隔布置的多个叶片，使得通过驱动叶轮转动带动叶片间的空气流动。每个叶片的叶片出口安放角设置成相同的角度，可以使叶片的受力更加均匀，进而使叶轮转动产生的气流更加平稳，也能延长叶轮的使用寿命。进一步地，叶片出口安放角设置为145°-155°，即叶轮采用前向式叶轮(叶片出口安放角大于90°)，能够获得更高的压头，并可在相同条件下(即电机的输出功率、叶片的大小、叶片的数量、叶片的间距等相同)获得更大的空气流量。更进一步地，叶片出口安放角设置为145°-155°，使得前向式叶轮的叶片的倾斜角度适中，可以避免倾斜角度过大造成压头过大而使叶片变形，也可以防止倾斜角度过小造成压头过小影响空气的流量
在上述壁挂式洗涤设备的优选技术方案中，在所述第一水平底面的中心上形成有风机吸风口，所述第二水平顶面和所述第二水平底面的末端限定了风机排风口，并且所述壁挂式洗涤设备还包括：送风风道，所述送风风道分别与所述风机排风口和所述外筒的进风口相连接；和回风风道，所述回风风道具有底部进口和顶部出口，所述底部进口与所述外筒的出风口重合，并且所述顶部出口配置成与所述风机吸风口对接。通过上述的配置，壁挂式洗涤设备能够形成封闭的循环空气回路，防止烘干过程中产生的湿热空气直接排出而影响周边环境。
在上述壁挂式洗涤设备的优选技术方案中，在所述蜗壳内并靠近所述风机排风口的位置处设有加热部件。在蜗壳内靠近风机排风口的位置设置加热部件，能够使得空气在经过加热部件时被加热转化成为干热的烘干空 气，烘干空气被输送到壁挂式洗涤设备内带走待烘干衣物内的水分，从而实现烘干衣物的目的。
附图说明
下面参照附图来描述本发明的优选实施方式，附图中：
图1是本发明壁挂式洗涤设备的实施例的立体示意图；
图2是本发明壁挂式洗涤设备的部分结构的实施例立体示意图；
图3是图2所示的本发明壁挂式洗涤设备的部分结构的实施例的俯视示意图；
图4是本发明壁挂式洗涤设备的风机的实施例的立体示意图；
图5是本发明壁挂式洗涤设备的蜗壳的实施例的立体示意图；
图6是本发明壁挂式洗涤设备的蜗壳内部的实施例的结构示意图；
图7是图6所示的本发明壁挂式洗涤设备的蜗壳内部的实施例的A部局部放大图；
图8是本发明壁挂式洗涤设备的下蜗壳的实施例的结构示意图；
图9是本发明壁挂式洗涤设备的蜗壳的轮廓线的实施例的示意图。
附图标记列表：
1、壁挂式洗涤设备；10、外筒；11、背板；12、筒体；121、顶部；122、侧壁；1221、外筒出风口；123、前端；124、后端；13、外筒盖；131、环形壁；1311、外筒进风口；132、窗垫；1321、窗垫主体；1322、连接部；14、开口；15、观察窗；20、风机；21、蜗壳；211、上蜗壳；2111、第一水平顶面；21111、电机安装槽；2112、螺旋曲面；2113、第二水平顶面；212、下蜗壳；2121、第一水平底面；2122、斜向曲面；2123、第二水平底面；213、出风通道；214、蜗舌；215、风机吸风口；216、风机排风口；22、叶轮；221、叶片；23、加热部件；30、送风风道；31、第一端；32、第二端；40、回风风道；41、风道主体；411、弧形壁；4111、底部进口；412、倒L形周壁；413、顶壁、4131、顶部出口；414、侧向开口；42、风道盖。
具体实施方式
下面参照附图来描述本发明的优选实施方式。本领域技术人员应当理解的是，这些实施方式仅仅用于解释本发明的技术原理，并非旨在限制本发明的保护范围。
需要说明的是，在本发明的描述中，术语“上”、“下”、“左”、“右”、“内”、“外”等指示的方向或位置关系的术语是基于附图所示的方向或位置关系，这仅仅是为了便于描述，而不是指示或暗示所述装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本发明的限制。此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性。
此外，还需要说明的是，在本发明的描述中，除非另有明确的规定和限定，术语“安装”、“设置”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是直接相连，也可以通过中间媒介间接相连，还可以是两个元件内部的连通。对于本领域技术人员而言，可根据具体情况理解上述术语在本发明中的具体含义。
为了解决现有技术中壁挂式洗涤设备的风机出风量较小的技术问题，本发明提供了一种壁挂式洗涤设备1。该壁挂式洗涤设备1包括外筒10和固定在外筒10的顶部121上的风机20，风机20包括蜗壳21和布置在蜗壳21内的叶轮22，蜗壳21包括：上蜗壳211，上蜗壳211具有依次相接的第一水平顶面2111、螺旋曲面2112和第二水平顶面2113，第一水平顶面2111和第二水平顶面2113垂直于叶轮22的轴线C，螺旋曲面2112配置成从第一水平顶面2111螺旋上升地延伸到第二水平顶面2113；和下蜗壳212，下蜗壳212与上蜗壳211对接以限定出风通道213，并且下蜗壳212具有垂直于轴线C的第一水平底面2121，使得出风通道213对应于螺旋曲面2112的部分的高度沿着螺旋曲面2112的延伸方向逐渐增加。通过上述的配置，充分利用了在该壁挂式洗涤设备1的顶部预留的安装空间，使得该壁挂式洗涤设备1的出风通道213的整体空间变大，且出风通道213对应于螺旋曲面2112的部分的截面沿着螺旋曲面2112的延伸方向逐渐增加，风阻减小，因此风机的出风量增加。
在本文中提及的术语除非有明显相反的说明，“包角”是指蜗壳的外轮廓线中从渐开线部分上任意两点与基圆圆心的连线的夹角；“最大包角”是指蜗壳的外轮廓线中渐开线起点和终点与基圆圆心的连线的夹角；“拟 合”是指两个相关联的元素或对象彼此在形状上趋同，并且彼此间隔预定距离并大致平行；“叶片出口安放角”是指叶片在叶轮外径处的切线与圆周方向的夹角。
图1是本发明壁挂式洗涤设备的实施例的立体示意图；图2是本发明壁挂式洗涤设备的部分结构的实施例立体示意图；图3是图2所示的本发明壁挂式洗涤设备的部分结构的实施例的俯视示意图；图4是本发明壁挂式洗涤设备的风机的实施例的立体示意图；图5是本发明壁挂式洗涤设备的蜗壳的实施例的立体示意图；图6是本发明壁挂式洗涤设备的蜗壳内部的实施例的结构示意图；图7是图6所示的本发明壁挂式洗涤设备的蜗壳内部的实施例的A部局部放大图；图8是本发明壁挂式洗涤设备的下蜗壳的实施例的结构示意图；图9是本发明壁挂式洗涤设备的蜗壳的轮廓线的实施例的示意图。
如图1所示，在一种或多种实施例中，壁挂式洗涤设备1为壁挂式滚筒洗衣机。替代地，壁挂式洗涤设备1也可为壁挂式烘干机或者其它合适形式的洗涤设备。该壁挂式洗涤设备1包括外筒10、内筒(图中未示出)、风机20、送风风道30和回风风道40等部件，使得该壁挂式洗涤设备1具有但不限于洗涤、漂洗、脱水和烘干等功能。
如图1所示，在一种或多种实施例中，外筒10包括背板11、筒体12、外筒盖13和观察窗15。基于图1所示的方位，筒体12具有前端123和相对的后端124。筒体12的后端124与背板11的前侧固定在一起，外筒盖13覆盖筒体12的前端123，并且观察窗15固定在外筒盖13上。如图1所示，背板11为大致平板状。在背板11的四个对角上分别布置有安装孔(图中未示出)。安装孔可以与安装件(图中未示出)相互配合，使得该壁挂式洗涤设备1能够借助背板11固定在预定的墙壁上。筒体12大致为圆柱形空腔，用于限定出可容置洗涤衣物或其它洗涤物品的内筒的空间。优选地，背板11和筒体12可由PP、ABS或者其它适合的树脂材料通过注塑一体成型。替代地，背板11和筒体12也可单独制成，然后固定到一起。固定方式可采用熔敷焊接、螺钉固定、螺栓固定或者其它合适的固定方式。外筒盖13可采用PP、ABS或者其它适合的树脂材料通过注塑一体成型。外筒盖13可通过包括但不限于熔敷焊接、螺钉、螺栓的方式固定在筒体12上。如图2所示，在外筒盖13上形成有围绕筒体12的中心轴线垂直向外延伸的环形壁131，以限定出大致圆形的开口14。如图3所示，在一种或多种实施例中，在环形壁131的顶部形成有外筒进风口1311， 以便与送风风道30相连接，从而可向筒体12内输送用于烘干衣物或其它物品的干热空气。在一种或多种实施例中，外筒进风口1311设置为大致矩形且倒圆角。替代地，外筒进风口1311也可设置成其它合适的形状，例如梯形、椭圆形等。如图2所示，在一种或多种实施例中，在环形壁131的内侧布置有窗垫132。窗垫132包括大致环形的窗垫主体1321和从窗垫主体1321沿其径向垂直向外延伸且中空的连接部1322。连接部1322穿过外筒进风口1311，以便与送风风道30对接。窗垫132可采用橡胶等合适材质通过注塑工艺一体成型。如图1所示，在一种或多种实施例中，观察窗15枢转连接在外筒盖13上。观察窗15配置成可封闭开口14。观察窗15可采用ABS、钢化玻璃或者其它合适的材质造成。优选地，观察窗15具有一定的透明度，使得通过观察窗15可观察内筒内待洗涤衣物的洗涤状况。
如图1所示，在一种或多种实施例中，风机20布置在筒体12的顶部121并靠近筒体12的右侧。替代地，风机20也可布置在筒体12的顶部121并靠近筒体12的左侧。风机20包括蜗壳21、布置在蜗壳21内的叶轮22(如图7所示)和电机(图中未示出)。电机的电机轴固定在叶轮22上，并且电机与壁挂式洗涤设备1的控制器(图中未示出)形成电连接，使得通过控制电机的通电和断电能够驱动叶轮22转动。电机包括但不限于步进电机、无刷电机、伺服电机或其它合适形式的电机。
如图4和图5所示，在一种或多种实施例中，蜗壳21包括上蜗壳211和下蜗壳212。上蜗壳211和下蜗壳212相互对接以限定出出风通道213。上蜗壳211可采用由PP、ABS或者其它适合的树脂材料通过注塑一体成型，以便简化制造工艺。上蜗壳211具有依次相接的第一水平顶面2111、螺旋曲面2112和第二水平顶面2113。基于图4所示的方位，第一水平顶面2111大致沿水平方向延伸。如图5所示，在第一水平顶面2111上形成有向内凹陷的电机安装槽21111。电机安装槽21111配置成可容纳电机，使得电机可固定在电机安装槽21111内。电机的电机轴从电机安装槽21111延伸到蜗壳21的内部，并与叶轮22(如图6所示)形成固定连接。电机轴与叶轮22的固定方式包括但不限于螺钉固定、螺栓固定、铆钉固定等。叶轮22布置在第一水平顶面2111的正下方，即第一水平顶面2111大致垂直于叶轮22的轴线C。螺旋曲面2112从第一水平顶面2111上沿逆时针方向螺旋上升地延伸到第二水平顶面2113上。替代地，螺旋曲线2112也可配置成从第一水平顶面2111上沿顺时针方向螺旋上 升地延伸到第二水平顶面2113上(此时，蜗壳21布置在筒体12的顶部121并靠近筒体12的左侧)。第二水平顶面2113从螺旋曲面2112的末端沿垂直于叶轮22的轴线C方向延伸。当蜗壳21固定在筒体12的顶部121上时，第二水平顶面2113朝向外筒10的前端。第二水平顶面2113和第一水平顶面2111在叶轮22的轴线C方向上存在高度差H(第二水平顶面2113高于第一水平顶面2111)。高度差H满足H＝(0.2-0.6)×R(其中，R为叶轮22的半径)，使得第二水平顶面2113和第一水平顶面2111在叶轮22的轴线C方向上具有适中的高度差H，不仅可以满足出风通道213的整体空间增加的要求，也可避免高度差H太大而占用太多空间。
如图4和图5所示，在一种或多种实施例中，下蜗壳212配置成与上蜗壳211相互对接。下蜗壳212与上蜗壳211之间可通过熔敷焊接、螺钉固定、螺栓固定或者其它合适的方式进行固定。下蜗壳212也可采用由PP、ABS或者其它适合的树脂材料通过注塑一体成型，以便简化制造工艺。如图4、图5和图8所示，下蜗壳212具有依次相接的第一水平底面2121、斜向曲面2122和第二水平底面2123。第一水平底面2121沿垂直于叶轮22的轴线C的方向延伸。如图8所示，在第一水平底面2121上形成有风机吸风口215。风机吸风口215布置在叶轮22的正下方，使得叶轮22转动时可将空气从风机吸风口215吸入并推到出风通道213中，然后推动空气沿着出风通道213向外流动。优选地，风机吸风口215配置成大致圆形的形状，并具有比叶轮22外径小的直径。如图4和图5所示，斜向曲面2122从第一水平底面2121倾斜向上地延伸到第二水平底面2123上。基于图4所示的方位，斜向曲面2122布置成向左上方延伸。替代地，斜向曲面2122也可布置成向右上方延伸(此时，蜗壳21布置在筒体12的顶部121并靠近筒体12的左侧)。在一种或多种实施例中，斜向曲面2122布置成与外筒10的顶部121的弧形壁相拟合，使得蜗壳21能够与外筒10的顶部121更加贴合，该壁挂式洗涤设备1的结构更加紧凑。如图4和图5所示，第二水平底面2123从斜向曲面2122的末端沿垂直于叶轮22的轴线C的方向延伸，并且第二水平底面2123沿着叶轮22的轴线C方向高于第一水平底面2121。当蜗壳21固定在筒体12的顶部121上时，第二水平底面2123朝向外筒10的前端。第二水平底面2123和第二水平顶面2113的末端(靠近外筒10的前端)限定了风机排风口216。风机排风口216配置成与送风风道30相接，以便将风机20产生的干热空气输送到外筒10内。
如图6所示，在一种或多种实施例中，蜗壳21内还形成有蜗舌214。蜗舌214布置在第一水平底面2121和斜向曲面2122的内侧相接的位置，并沿垂直于第一水平底面2121的方向延伸。蜗舌214的设置可以防止部分空气在蜗壳21内循环，以提高风机20的送风效率，降低噪音。蜗舌214的弧度可根据实验或者经验获得，使得空气在经过蜗舌214表面时的噪音较小。
如图9所示，蜗壳21的部分外轮廓线配置成渐开线。在一种或多种实施例中，渐开线具有13个基线，分别为第一基线l 1、第二基线l 2、……、第十二基线l 12和第十三基线l 13。第一基线l 1设置成从叶轮22的圆心O到蜗舌214的最短连线。在一种或多种实施例中，渐开线的最大包角α的范围为250°-300°，即第一基线l 1和第十三基线l 13相对于叶轮22的圆心O所夹持的角度α的范围为250°-300°。通过设置较大的最大包角α的范围，能够获得良好的风机性能，提高风机20的送风效率，增大出风量。在一种或多种实施例中，第一基线l 1的长度L 1，即叶轮22的圆心O到蜗舌214的最短连线长度为L 1。第二基线l 2的长度为L 2，并且满足L 2＝(1.02-1.1)×L 1。以此类推，第三基线l 3、第四基线l 4、……、第十二基线l 12、第十三基线l 13的长度均满足L n＝(1.02-1.1)×L (n-1)，其中，n为大于等于3并小于等于13的整数。每个基线的长度与相邻基线长度的比值均相同，例如均为1.05，或者比1.05大或小的其它合适的比值。另外，第二基线l 2与第一基线l 1夹持预定夹角β。相应地，第三基线l 3、第四基线l 4、……、第十二基线l 12、第十三基线l 13中每两个相邻的基线之间也夹持相同的预定夹角β。预定夹角β的范围为20°-30°，且预定夹角β与最大包角α之间满足α＝(n-1)×β。替代地，基线的数量可配置成比13多或少的其它合适的数量，例如9个、15个等。可以理解的是，渐开线的起点为第一基线l 1上与圆心O相对的端点，渐开线的末端为第n基线l n上与圆心O相对的端点，并且渐开线经过每个基线上与圆心O相对的端点，通过将上述离散的端点拟合成曲线形成弧形的渐开线。需要指出的是，此处所称的“拟合”为通过曲线拟合方法将给定的离散数据点，建立数据关系或数据模型，以形成光滑的曲线。
当上蜗壳211和下蜗壳212相互对接组装在一起时，蜗壳21限定出出风通道213。由于蜗壳21的部分外轮廓线配置成渐开线，因此出风通道213在径向上(即垂直于叶轮22的轴线C的方向)沿着出风方向的截面逐渐增大，空气在经过该段出风通道213时的流速相应地减小，部分动能转化为静压能。 另外，上蜗壳211上的螺旋曲面2112配置成从第一水平顶面2111螺旋上升地延伸到第二水平顶面2113上，使得出风通道213对应于螺旋曲面2112部分在轴向(即平行于叶轮22的轴线C的方向)上的高度沿着螺旋曲面2112的延伸方向逐渐增加，该段出风通道213的截面也逐渐增加，空气在经过该段出风通道213时的流速相应地逐渐减小，部分动能进一步地转化为静压能。当空气在经过出风通道213对应于斜向曲面2122的部分时，由于斜向曲面2122倾斜地向上延伸，使得该段出风通道213的截面逐渐减小，空气在经过该段出风通道213时的流速增大，使得部分静压能又转化为动能，因此出风量增大，风机20的送风效率增加。
如图6所示，在一种或多种实施例中，叶轮22采用PP、PPS或者其它适合的树脂材料通过注塑一体成型，以便简化制造工艺。叶轮22具有大致圆形的形状。在一种或多种实施例中，从叶轮22的圆心O到蜗舌214的最短连线l 1的长度L 1与叶轮22的半径R之间满足L 1＝(1.05-1.2)×R，使得蜗舌214与叶轮22的外径之间的间隙适中，从而避免间隙太大导致风机20的效率下降，也可以防止间隙太小而产生较大的噪音。叶轮22具有围绕其轴线C均匀间隔布置的多个叶片221。可以理解的是，叶片221的数量和相邻叶片221之间的间距可以根据实际需要调整。在一种或多种实施例中，叶轮22布置成前向叶轮(即叶片出口安放角大于90°)。叶轮22布置成前向叶轮能够获得更高的压头，并在相同条件下(即电机的输出功率、叶片的大小、叶片的数量、叶片的间距等相同)获得更大的空气流量。替代地，叶轮22也可布置成径向叶轮或者后向叶轮。如图7所示，每个叶片221的叶片出口安放角配置成相同的预定角度γ，使得每个叶片221受力更加均匀，既能使叶轮22转动时产生的气流更加平稳，也能够延长叶轮22的使用寿命。预定角度γ的范围为145°-155°，以获得适中的叶片出口安放角，以避免倾斜角度过大造成压头过大而使叶片变形，也可以防止倾斜角度过小造成压头过小影响空气的流量。
如图6所示，在一种或多种实施例中，在蜗壳21内并靠近风机排风口216的位置设有加热部件23。加热部件23可以将风机20产生的空气加热而转化为干热的烘干空气。加热部件23包括可将电能转化为热能的加热器。加热器可采用加热管、加热丝、加热片或者其它合适的元器件。优选地，加热部件23还包括用于控制加热器温度的温控开关(图中未示出)，加热器通 过温控开关与壁挂式洗涤设备1的控制系统实现电连接，以便在加热器过热时自动控制加热器断电。
如图1所示，在一种或多种实施例中，送风风道30包括与蜗壳21的风机排风口216相连的第一端31，和与外筒进风口1311相连的第二端32。在一种或多种实施例中，送风风道30包括上送风风道壳部和下送风风道壳部(图中未示出)，且上送风风道壳部与上蜗壳211、下送风风道壳部与下蜗壳212均通过注塑工艺一体成型，使得空气在经过第一端31时，不会因存在安装间隙导致风阻增大而影响送风效率。送风风道30的第二端32具有矩形且倒圆角的截面。替代地，第二端32也可设置成其它合适的截面，例如梯形、椭圆形等。送风风道30的第二端32配置成可插入窗垫132的连接部1322中并延伸进外筒进风口1311内，使得送风风道30能够与外筒进风口1311之间实现有效密封，防止烘干空气从安装间隙处流出，影响烘干效率、产生噪音。
如图1所示，在一种或多种实施例中，回风风道40包括风道主体41和风道盖42。回风风道40配置成可将外筒10内的湿热空气转化为干冷空气和冷凝水。基于图1所示的方位，回风风道40布置在筒体12的右侧并沿竖直方向延伸。替代地，回风风道40也可布置在筒体12的左侧并沿竖直方向延伸(此时，蜗壳21布置在筒体12的顶部121并靠近筒体12的左侧)。风道主体41配置成与筒体12右侧的侧壁122形成一体并沿竖直方向延伸，使得整个壁挂式洗涤设备1的结构更加紧凑。基于图1所示的方位，风道主体41包括形成在筒体12右侧侧壁122上的部分弧形壁411，从弧形壁411的边缘沿大致水平的方向向右延伸的倒L形周壁412，和形成在倒L形周壁412顶部的顶壁413。在弧形壁411的靠近其底部的位置设置有底部进口4111。底部进口4111与外筒出风口1221重合。在顶壁413上设置有顶部出口4131。顶部出口4131配置成可与风机吸风口215对接。如图2所示，倒L形周壁412和顶壁413限定出大致沿竖直方向延伸的侧向开口414。风道盖42配成可拆卸地固定在侧向开口414上并可封闭侧向开口414。风道盖42和侧向开口414的设置，可以满足风道主体41与外筒10一体成型的工艺要求。风道盖42和风道主体41的固定方式包括但不限于螺钉连接、螺栓连接或者铆钉连接，以便用户将风道盖42拆卸下来，并方便地从侧向开口414对回风风道40内部进行清洁。优选地，风道盖42与侧向开口414之间还配置有密封件(图中未示出)，使得风道盖42能够有效密闭风道主体41，防止空气从安装间隙处流出。
在一种或多种实施例中，回风风道40内还设置有冷凝组件(图中未示出)。冷凝组件布置在回风风道40内的合适位置，例如靠近底部进口4111的上部，以便于对从底部进口4111流入的湿热空气进行冷凝。冷凝组件具有冷凝器(图中未示出)，冷凝器可采用管片式冷凝器、管带式冷凝器，或者其它合适的冷凝元器件。筒体12内的湿热空气通过外筒出风口1221(即底部进口4111)流入回风风道40，在经过冷凝器表面后转换为干冷空气和冷凝水。替代地，在回风风道40内也可设置冷凝喷淋装置(例如冷水喷淋装置)以对湿热空气进行冷却除湿。叶轮22旋转使风机吸风口215下方的回风风道40内形成负压，从而抽吸干冷空气进入到蜗壳21内，形成空气循环。冷凝水在其自身重力作用下顺着竖直方向延伸的回风风道40的内壁，从位于回风风道40下部的底部进口4111流向筒体12内部，并从顺着筒体12的底壁从排水口(图中未示出)排出筒体12，防止冷凝水滞留在回风风道40内滋生细菌、产生异味。
至此，已经结合附图所示的优选实施方式描述了本发明的技术方案，但是，本领域技术人员容易理解的是，本发明的保护范围显然不局限于这些具体实施方式。在不偏离本发明的原理的前提下，本领域技术人员可以对来自不同实施例的技术特征进行组合，也可以对相关技术特征作出等同的更改或替换，这些更改或替换之后的技术方案都将落入本发明的保护范围之内。

Claims (10)

  1. 一种壁挂式洗涤设备，其特征在于，所述壁挂式洗涤设备包括外筒和固定在所述外筒的顶部上的风机，所述风机包括蜗壳和布置在所述蜗壳内的叶轮，所述蜗壳包括：
    上蜗壳，所述上蜗壳具有依次相接的第一水平顶面、螺旋曲面和第二水平顶面，所述第一水平顶面和所述第二水平顶面垂直于所述叶轮的轴线，所述螺旋曲面配置成从所述第一水平顶面螺旋上升地延伸到所述第二水平顶面；和
    下蜗壳，所述下蜗壳与所述上蜗壳对接以限定出风通道，并且所述下蜗壳具有垂直于所述轴线的第一水平底面，使得所述出风通道对应于所述螺旋曲面的部分的高度沿着所述螺旋曲面的延伸方向逐渐增加。
  2. 根据权利要求1所述的壁挂式洗涤设备，其特征在于，所述风机还包括蜗舌，所述叶轮的圆心到所述蜗舌的最短连线长度为L 1，所述叶轮的半径为R，并且L 1＝(1.05-1.2)×R。
  3. 根据权利要求2所述的壁挂式洗涤设备，其特征在于，所述蜗壳的垂直于所述轴线的投影面的部分外轮廓线为渐开线，所述渐开线的最大包角α范围为250°-300°。
  4. 根据权利要求3所述的壁挂式洗涤设备，其特征在于，所述渐开线具有n个基线，
    其中，第一基线l 1为从所述叶轮的圆心到所述蜗舌的最短连线并具有最短连线长度L 1，每个所述基线的长度满足L n＝(1.02-1.1)×L (n-1)，并且每两个相邻的所述基线之间形成预定夹角β，所述预定夹角β的范围为20°-30°，n为大于等于3的整数。
  5. 根据权利要求2所述的壁挂式洗涤设备，其特征在于，所述第二水平顶面和所述第一水平顶面在所述轴线的方向上的高度差H满足H＝(0.2-0.6)×R。
  6. 根据权利要求1所述的壁挂式洗涤设备，其特征在于，所述下蜗壳还包括斜向曲面和第二水平底面，所述第二水平底面平行于所述第二水平顶面，并且所述第二水平底面在所述轴线的方向上高于所述第一水平底面，所述斜向曲面配置成从所述第一水平底面倾斜向上地延伸到所述第二水平底面，并且所述斜向曲面与所述外筒的顶部的弧形壁相拟合。
  7. 根据权利要求6所述的壁挂式洗涤设备，其特征在于，所述螺旋曲面的延伸方向为顺时针方向或者逆时针方向，并且所述第二水平顶面和所述第二水平底面朝向所述外筒的前端方向延伸。
  8. 根据权利要求1所述的壁挂式洗涤设备，其特征在于，所述叶轮具有围绕所述轴线均匀间隔布置的多个叶片，每个所述叶片的叶片出口安放角具有相同的预定角度γ，所述预定角度γ的范围为145°-155°。
  9. 根据权利要求1-8任意一项所述的壁挂式洗涤设备，其特征在于，在所述第一水平底面的中心上形成有风机吸风口，所述第二水平顶面和所述第二水平底面的末端限定了风机排风口，并且所述壁挂式洗涤设备还包括：
    送风风道，所述送风风道分别与所述风机排风口和所述外筒的进风口相连接；和
    回风风道，所述回风风道具有底部进口和顶部出口，所述底部进口与所述外筒的出风口重合，并且所述顶部出口配置成与所述风机吸风口对接。
  10. 根据权利要求9所述的壁挂式洗涤设备，其特征在于，在所述蜗壳内并靠近所述风机排风口的位置处设有加热部件。
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