WO2017128958A1 - 干衣机 - Google Patents

干衣机 Download PDF

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Publication number
WO2017128958A1
WO2017128958A1 PCT/CN2017/070945 CN2017070945W WO2017128958A1 WO 2017128958 A1 WO2017128958 A1 WO 2017128958A1 CN 2017070945 W CN2017070945 W CN 2017070945W WO 2017128958 A1 WO2017128958 A1 WO 2017128958A1
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WO
WIPO (PCT)
Prior art keywords
fan
flow guiding
guiding device
volute
bottom plate
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Application number
PCT/CN2017/070945
Other languages
English (en)
French (fr)
Inventor
邴进东
成荣锋
颜鲁华
李怡锦
王鹏
Original Assignee
青岛海尔洗衣机有限公司
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Application filed by 青岛海尔洗衣机有限公司 filed Critical 青岛海尔洗衣机有限公司
Priority to JP2018539303A priority Critical patent/JP2019508105A/ja
Publication of WO2017128958A1 publication Critical patent/WO2017128958A1/zh

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    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/20General details of domestic laundry dryers 
    • DTEXTILES; PAPER
    • D06TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06FLAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
    • D06F58/00Domestic laundry dryers
    • D06F58/10Drying cabinets or drying chambers having heating or ventilating means
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D25/00Pumping installations or systems
    • F04D25/02Units comprising pumps and their driving means
    • F04D25/08Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/4206Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
    • F04D29/4226Fan casings
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04DNON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00Details, component parts, or accessories
    • F04D29/40Casings; Connections of working fluid
    • F04D29/42Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44Fluid-guiding means, e.g. diffusers
    • F04D29/441Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00Components
    • F05D2240/10Stators
    • F05D2240/12Fluid guiding means, e.g. vanes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05DINDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2240/00Components
    • F05D2240/10Stators
    • F05D2240/14Casings or housings protecting or supporting assemblies within

Definitions

  • the invention relates to a clothes dryer and belongs to the field of clothes dryer devices.
  • the basic principle of the working principle of the dryer is to heat the relatively dry air, so that the dry air can warm up and reach the capacity of the dry air to carry water.
  • the hot and dry air is sent to the dryer drum by the fan. After the wet clothes are contacted, the wet clothes are heated. The moisture in the wet clothes is precipitated in the form of water vapor. At this time, the hot and dry air absorbs the clothes quickly. The surface water vapor becomes a saturated humid air of medium and high temperature, and then the high-temperature saturated humid air is taken away from the clothes by the action of the fan, thereby achieving the purpose of drying clothes.
  • the dryer drum is rotated clockwise one-way, counterclockwise one-way rotation or counterclockwise alternately to rotate the clothes around the central axis of the drum, so that the clothes are turned over, so that It can make the clothes dry evenly and shorten the drying time of the clothes, reduce the entanglement of the clothes, and enhance the user's feeling of use.
  • the air inlet device includes a fan in the volute and the volute, and a heating device is installed at the air outlet of the air inlet device, but in operation practice, the main flow of the airflow always flows toward the heating device along the side wall in the rotating direction and appears on the opposite side.
  • the present invention has been made in view of the above.
  • the technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, and provide a clothes dryer, which improves the air outlet position of the fan, adjusts the backflow of the main flow of the airflow, improves the utilization efficiency of the heating device, and avoids the heating device.
  • the safety hazard caused by local overheating improves the drying efficiency.
  • the clothes dryer is provided with a fan inside, the fan comprises a volute and a fan, the inner cavity of the volute is symmetrical structure, the fan is located in the inner cavity of the volute and the fan center is arranged on the symmetry axis of the inner cavity of the volute, and the fan faces the volute
  • One side of the air outlet is provided with a flow guiding device and the flow guiding device has a gap with the outer circumference of the fan, and the flow guiding device has a symmetrical structure and the center thereof is disposed at On the axis of symmetry of the inner cavity of the volute.
  • the flow guiding device is long toward one end of the fan and short toward one end of the fan to form a triangular or triangular-like structure.
  • the length of the flow guiding device in the radial direction of the fan is smaller than the diameter of the fan.
  • the flow guiding device is inverted T-shaped, and comprises a bottom plate and a vertical portion connected to the bottom plate and located at a middle portion of the bottom plate.
  • the bottom surface of the bottom plate faces the fan, and the free end of the vertical portion faces away from the bottom plate and faces the vent air outlet, and the vertical portion is perpendicular to the bottom plate. Bottom surface.
  • the bottom surface of the inverted T-shaped flow guiding device is a curved surface, and the curved surface extends along the outer circumference of the fan.
  • the vertical portion of the inverted T-shaped flow guiding device transitions from the free end to the joint with the bottom plate through the inclined surface or the curved surface, and the vertical portion is gradually narrowed from the free end to the connection with the bottom plate; the vertical portion The free end is curved.
  • top surface of the bottom plate of the inverted T-shaped flow guiding device is a curved surface; and the top surface and the bottom surface of the bottom plate of the inverted T-shaped flow guiding device are transformed by a curved surface.
  • the arc center of the free end of the vertical portion of the inverted T-shaped flow guiding device forms an angle of 30-90 degrees with the angle ⁇ of the left and right arc-shaped center lines between the top surface and the bottom surface of the bottom plate.
  • the flow guiding device is triangular, the bottom surface of the triangle faces the fan, the apex angle of the triangle faces the vent outlet of the volute, and the transition between the two waists and the bottom surface of the triangular flow guiding device passes through the curved surface.
  • the apex angle of the triangular flow guiding device is a curved surface; the two waists of the triangular flow guiding device are plane or curved surface, and the curved surface is a curved surface of the outward drum.
  • the present invention has the following advantageous effects compared with the prior art.
  • the clothes dryer of the invention is provided with a fan, the fan comprises a volute and a fan, the inner cavity of the volute is symmetrical structure, the fan is located in the inner cavity of the volute and the fan center is arranged on the symmetry axis of the inner cavity of the volute, and the fan is oriented
  • One side of the volute air outlet is provided with a flow guiding device and the flow guiding device has a gap with the outer circumference of the fan, and the flow guiding device has a symmetrical structure and the center thereof is disposed on the symmetry axis of the inner cavity of the volute, and the fan is driven by the flow guiding device
  • the generated main flow of the airflow flows along the side of the flow guiding device and a side wall of the opposite volute to the heating device, and the mainstream of the airflow covers most or all of the heating device, and there is less airflow in the other side that touches the volute
  • the side wall is folded back and flows toward the fan.
  • the part of the airflow can be re-added to the rotation of the fan under the guidance of the other side wall of the volute and the deflector, without being in the fan and the volute.
  • the dryer of the invention increases the flow rate and pressure of the fan, thereby improving the efficiency of the fan, and the flow guiding device can improve the problem of uneven temperature distribution of the heating device, improve the utilization efficiency of the heating device, and eliminate local overheating of the heating device.
  • the safety hazard the heating device can be continuously heated, without frequent power-off, thereby improving the drying efficiency, shortening the drying time and prolonging the life of the electrical components.
  • FIG. 1 is a schematic view of a gas flow in a conventional air intake device.
  • FIG. 2 is a schematic structural view and a flow diagram of a dryer of the dryer in the first embodiment.
  • FIG 3 is a schematic structural view of an inverted T-shaped flow guiding device in the first embodiment.
  • FIG. 4 is a schematic view showing the cooperation of the inverted T-shaped flow guiding device and the fan in the first embodiment.
  • Fig. 5 is a schematic structural view of a triangular flow guiding device.
  • Figure 6 is a schematic view of the structure of the triangular flow guiding device.
  • Figure 7 is a schematic view of three types of cooperation between the fan and the volute.
  • Figure 8 is a schematic view of three types of cooperation between the fan and the volute.
  • the fan disposed inside the dryer includes a volute 1 and a fan 2.
  • the inner cavity of the volute 1 has a symmetrical structure
  • the fan 2 is located in the inner cavity of the volute 1 and the center of the fan 2 is disposed on the symmetry axis of the inner cavity of the volute 1, and the side of the fan 2 is disposed on the side of the air outlet of the volute 1
  • the device and the flow guiding device have a gap with the outer circumference of the fan 2.
  • the flow guiding device has a symmetrical structure and its center is disposed on the axis of symmetry of the inner cavity of the volute 1.
  • the fan of the dryer can effectively output the airflow of the same pressure and air volume when the fan rotates smoothly and counterclockwise.
  • the longitudinal section of the volute 1 comprises a circular contour, and the circular contour is provided with an opening, and the two sides of the opening are respectively provided with a straight plate, and the two straight plates are respectively opposite to the sides of the opening.
  • the circular contour is tangent to form a U-shaped profile, and the two straight plates communicate with the opening to form an air outlet of the volute 1, and the fan 2 is located inside the circular contour and at the center of the circular contour.
  • the three cases a, b, and c in Fig. 7 are different in that: the angle between the two straight plates.
  • the longitudinal section of the volute 1 comprises a circular-like contour composed of a plurality of involute profiles, and an opening is provided in the circular contour, and a straight plate is provided on both sides of the opening.
  • the two straight plates are respectively tangent to the circular contours on both sides of the opening to form a U-shaped contour, and the two straight plates communicate with the opening to form an air outlet of the volute 1;
  • the fan 2 is located Within the circular contour, and the central axis of the fan 2 is located on the side of the circular-like contour center away from the air outlet. That is, the gap between the volute 1 and the fan 2 gradually increases from the bottom of the U-shaped profile toward the air outlet, and a better wind pressure can be formed to increase the circulating air flow.
  • the three cases a, b, and c in Fig. 8 are different in that: the angle between the two straight plates.
  • the various matching conditions shown in FIG. 7 and FIG. 8 can realize that the fan of the dryer can effectively output the airflow of the same pressure and air volume when the fan rotates clockwise and counterclockwise alternately.
  • the flow guiding device is elongated toward one end of the fan and short toward one end of the fan to form a triangular or triangular-like structure.
  • the airflow generated by the rotation of the fan can flow out between the fan and the side wall of the volute, and the length of the flow guiding device along the radial direction of the fan 2 is smaller than the diameter of the fan 2.
  • the flow guiding device is inverted T-shaped, and the inverted T-shaped flow guiding device 5 includes a bottom plate and a vertical portion connected to the bottom plate and located in the middle of the bottom plate, and the bottom surface of the bottom plate faces the fan 2,
  • the top surface of the bottom plate faces the vent outlet of the volute
  • the vertical portion is connected to the top surface of the bottom plate, and the free end of the vertical portion faces away from the bottom plate and faces the vent opening of the volute.
  • the vertical portion is perpendicular to the bottom surface of the bottom plate.
  • the bottom surface of the inverted T-shaped flow guiding device is a curved surface, and the curved surface extends along the outer circumference of the fan.
  • the top surface of the bottom plate of the inverted T-shaped flow guiding device is a curved surface.
  • the arc surface transition between the top surface and the bottom surface of the bottom plate of the inverted T-shaped flow guiding device is as shown in FIG. 4, and the arc diameter R of the curved surface is 4-12 mm. In the embodiment, R takes 8 mm.
  • the vertical portion of the inverted T-shaped flow guiding device transitions from its free end to its connection with the bottom plate through a slope or a curved surface to form a triangular-like structure. If a curved surface transition is used, the curved surface is Inwardly concave curved surface; the vertical portion of the inverted T-shaped flow guiding device is gradually widened from its free end to its connection with the bottom plate; the free end of the vertical portion is curved; the outline of the inverted T-shaped flow guiding device The overall contour is rounded.
  • the bottom surface of the bottom plate of the inverted T-shaped flow guiding device and the outer circumferential gap h of the fan 2 are 5-12 mm.
  • the arc center of the free end of the vertical portion of the inverted T-shaped flow guiding device and the left and right arcs between the top surface and the bottom surface of the bottom plate The angle formed by the center line is 30-90 degrees.
  • h takes 5 mm and ⁇ takes 60 degrees.
  • the airflow generated by the rotation of the fan can flow out between the fan and the side wall of the volute, and the distance between the ends of the bottom of the inverted T-shaped deflector is smaller than the diameter of the fan 2.
  • the fan inside comprises a volute and a fan
  • the inner cavity of the volute is symmetrical structure
  • the fan is located in the inner cavity of the volute and the center of the fan is arranged on the symmetry axis of the inner cavity of the volute, and the fan is directed toward the volute
  • One side of the tuyere is provided with a flow guiding device and the flow guiding device has a gap with the outer circumference of the fan, and the guiding device has a symmetrical structure and the center thereof is disposed on the symmetry axis of the inner cavity of the volute, and the airflow generated by the fan is transmitted through the guiding device.
  • the main flow flows along one side of the flow guiding device and a side wall of the opposite volute to the heating device, and the main flow of the airflow covers most or all of the heating device, and less airflow after hitting the other side wall of the volute
  • the return flow flows toward the fan. Due to the flow guiding device, the partial airflow can be re-added to the rotation of the fan under the guidance of the other side wall of the volute and the flow guiding device, and does not generate between the fan and the volute outlet. Concentration of recirculation.
  • the structure can increase the wind pressure, and according to the following formula, the wind pressure ⁇ P static in the following formula is increased, and the increase in the wind pressure ⁇ P static increases the fan. s efficiency.
  • the advantage of increasing wind pressure is that it increases the ability to overcome the resistance of the system, allowing as much hot air as possible to flow into the drum of the dryer. Since the amount of load is proportional to the resistance of the system, the dryer is improved. The drying effect under the condition of more load enables the dryer to dry the clothes faster and better under the condition of more load.
  • ⁇ Fan is the fan efficiency
  • W AirPower is the fan output power
  • W ShaftWork is the fan input power
  • Q is the air volume
  • ⁇ P static is the wind pressure
  • is the angular velocity
  • T shaft is the torque.
  • the dryer of the invention improves the flow rate and pressure of the fan, thereby improving the efficiency of the fan, and the flow guiding device can improve the problem of uneven temperature distribution of the heating device, improve the utilization efficiency of the heating device, and eliminate the locality of the heating device.
  • the safety hazard of overheating, the heating device can be continuously heated, and the power is not frequently turned on and off, thereby improving the drying efficiency, shortening the drying time and prolonging the life of the electrical components.
  • the flow guiding device is triangular
  • the triangular bottom surface of the triangular flow guiding device 6 faces the fan 2
  • the triangular apex angle faces the air outlet of the volute 1
  • the triangular flow guiding device The transition between the two waists and the bottom surface of the 6 is through a curved surface.
  • the apex angle of the triangular flow guiding device 6 is an angle formed by the curved surface.
  • the two waists of the triangular flow guiding device are flat.
  • the two waists of the triangular flow guiding device are curved surfaces, and the curved surface is an arc surface of the outward drum.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Detail Structures Of Washing Machines And Dryers (AREA)

Abstract

一种干衣机,其内部设置有风机,风机包括蜗壳(1)和风扇(2),蜗壳(1)内腔为对称结构,风扇(2)位于蜗壳(1)内腔且风扇(2)中心设置于蜗壳(1)内腔的对称轴线上,在风扇(2)朝向蜗壳(1)出风口的一侧设置有导流装置且导流装置与风扇(2)外周具有间隙,且导流装置为对称结构且其中心设置于蜗壳(1)内腔的对称轴线上。通过导流装置,使风扇(2)产生的气流主流沿导流装置一侧及其相对的蜗壳(1)一侧壁流向加热装置(3),气流主流覆盖加热装置(3)的绝大部分面积或全部,较少的气流在碰到蜗壳(1)的另一侧壁后折返向风扇(2)方向流动,在蜗壳(1)另一侧壁与导流装置的导引下重新加入风扇(2)的旋转中,不会在风扇(2)与蜗壳(1)出口间产生集聚的回流,提高了加热装置(3)的利用效率,消除了加热装置(3)局部过热的安全隐患,提高了烘干效率。

Description

干衣机 技术领域
本发明涉及一种干衣机,属于干衣机装置领域。
背景技术
干衣机工作基本原理是以加热相对干燥的空气,使干燥空气升温后达到干燥空气可携带水份的能力。高温干热的空气由风扇送达至干衣机滚筒中,接触到湿衣物后对湿衣物进行加热,湿衣物中的水份以水蒸汽的形式析出,此时高温干热的空气迅速吸收衣物表面的水蒸气变为中高温的饱和湿空气,再由风扇的作用把中高温饱和湿空气带离衣物,从而达到干衣的目的。与此同时,为确保干衣机滚筒中的衣物可以均匀干燥,干衣机滚筒绕滚筒中心轴线顺时针单向、逆时针单向转动或顺逆时针交替有规律转动以对衣物进行翻动,这样可以使衣物干燥均匀并可缩短衣物烘干时间,降低衣物缠绕,提升用户使用感。进风装置包括蜗壳和蜗壳内的风扇,在进风装置出风口安装有加热装置,但在操作实践中,气流的主流总是沿旋转方向的侧壁向加热装置流动和在对侧出现较为严重的回流现象(见图1),这样就降低了加热装置的利用效率,而且还会导致加热装置局部过热存在一定的安全隐患,为了避免此隐患的出现,实践中对加热装置实施了温度保护控制,该控制在加热装置温度超过设置的安全温度时会切断加热丝电源,使之停止加热,但这样会降低烘干效率,延长烘干时间并且多次通断电会影响电器元件寿命。
有鉴于此特提出本发明。
发明内容
本发明要解决的技术问题在于克服现有技术的不足,提供一种干衣机,对风扇出风位置进行了改进,调整了气流主流的回流,提高了加热装置的利用效率,避免了加热装置局部过热造成的安全隐患,提高了烘干效率。
为解决上述技术问题,本发明采用技术方案的基本构思是:
干衣机,其内部设置有风机,风机包括蜗壳和风扇,蜗壳内腔为对称结构,风扇位于蜗壳内腔且风扇中心设置于蜗壳内腔的对称轴线上,在风扇朝向蜗壳出风口的一侧设置有导流装置且导流装置与风扇外周具有间隙,且导流装置为对称结构且其中心设置于 蜗壳内腔的对称轴线上。
进一步的,沿风扇的径向看,导流装置朝向风扇的一端长,朝向风扇的一端短,形成类三角形或三角形结构。
进一步的,导流装置沿风扇的径向的长度小于风扇直径。
进一步的,导流装置为倒T形,包括底板及与底板连接且位于底板中部的竖部,底板的底面朝向风扇,竖部的自由端背离底板且朝向蜗壳出风口,竖部垂直于底板底面。
进一步的,倒T形导流装置的底面为弧面,弧面沿风扇外周延展。
进一步的,倒T形导流装置的竖部自其自由端向其与底板连接处通过斜面或者弧面过渡,竖部自其自由端向其与底板连接处由窄逐渐变宽;竖部的自由端为弧形。
进一步的,倒T形导流装置的底板的顶面为弧面;倒T形导流装置的底板的顶面与底面之间通过弧面过渡。
进一步的,倒T形导流装置竖部的自由端的弧形圆心与底板的顶面与底面之间的左右两个弧形的圆心连线形成的夹角α的角度30-90度。
进一步的,导流装置为三角形,三角形的底面朝向风扇,三角形顶角朝向蜗壳出风口,三角形导流装置的两腰与底面之间通过弧面过渡。
进一步的,三角形导流装置的顶角为弧面;三角形导流装置的两腰为平面或弧面,且弧面为向外鼓的弧面。
采用上述技术方案后,本发明与现有技术相比具有以下有益效果。
本发明干衣机,其内设置有风机,风机包括蜗壳和风扇,蜗壳内腔为对称结构,风扇位于蜗壳内腔且风扇中心设置于蜗壳内腔的对称轴线上,在风扇朝向蜗壳出风口的一侧设置有导流装置且导流装置与风扇外周具有间隙,且导流装置为对称结构且其中心设置于蜗壳内腔的对称轴线上,通过导流装置,使风扇产生的气流主流沿导流装置一侧及其相对的蜗壳一侧壁流向加热装置,并且气流主流覆盖加热装置的绝大部分面积或全部,有较少的气流在碰到蜗壳的另一侧壁后折返向风扇方向流动,由于有导流装置,故此部分气流能在蜗壳的另一侧壁与导流装置的导引下重新加入风扇的旋转中,而不会在风扇与蜗壳出口间产生集聚的回流。本发明干衣机提高了风扇的流量与压力,从而实现了风机的效率提升,导流装置可以改善了加热装置温度分布不均匀的问题,提高了加热装置的利用效率,消除了加热装置局部过热的安全隐患,加热装置可以持续加热,不用频繁通断电,从而提高了烘干效率,缩短了烘干时间并且延长了电器元件寿命。
下面结合附图对本发明的具体实施方式作进一步详细的描述。
附图说明
图1是现有进风装置中的气流示意图。
图2是实施例一中干衣机风机的结构示意图及气流示意图。
图3是实施例一中倒T形导流装置的结构示意图。
图4是实施例一中倒T形导流装置与风扇的配合示意图。
图5是三角形导流装置的结构示意图。
图6是三角形导流装置的结构示意图.
图7是风扇与蜗壳的三种配合示意图。
图8是风扇与蜗壳的三种配合示意图。
1、蜗壳 2、风扇 3、加热装置 4、回流 5、倒T形导流装置 6、三角形导流装置。
具体实施方式
实施例一
如图2所示,干衣机内部设置的风机,包括蜗壳1和风扇2。
蜗壳1内腔为对称结构,风扇2位于蜗壳1内腔且风扇2的中心设置于蜗壳1内腔的对称轴线上,在风扇2朝向蜗壳1出风口的一侧设置有导流装置且导流装置与风扇2外周具有间隙。导流装置为对称结构且其中心设置于蜗壳1内腔的对称轴线上。
由于干衣机要实现顺、逆时针交替有规律转动以对衣物进行翻动,故要使干衣机的风机在风扇顺、逆时针交替有规律转动时均能有效输出相同压力和风量的气流。
下面详述风扇与蜗壳的配合情况:
如图7的三幅图所示,蜗壳1的纵截面包括一圆形轮廓,在此圆形轮廓上设有开口,开口两侧向外各设有一直板,两直板分别与开口两侧的圆形轮廓相切构成U形轮廓,两直板之间与开口相通形成蜗壳1的出风口,风扇2位于圆形轮廓内且位于圆形轮廓中心。
图7中a、b、c三种情况不同之处在于:两直板之间的夹角。
如图8的三幅图所示,蜗壳1的纵截面包括多段渐开轮廓连接组成的类圆形轮廓,在此类圆形轮廓上设有开口,开口两侧向外各设有一直板,两直板分别与开口两侧的类圆形轮廓相切构成U形轮廓,两直板之间与开口相通形成蜗壳1的出风口;风扇2位于 类圆形轮廓内,且风扇2的中心轴位于类圆形轮廓中心远离出风口的一侧。即蜗壳1与风扇2之间的间隙自U形轮廓底部向出风口方向逐渐增大,能够形成更好的风压提高循环风流量。
图8中a、b、c三种情况不同之处在于:两直板之间的夹角。
图7和图8中显示的多种配合情况均可以实现干衣机的风机在风扇顺、逆时针交替有规律转动时均能有效输出相同压力和风量的气流。
如图2所示,沿风扇的径向看,导流装置朝向风扇的一端长,朝向风扇的一端短,形成类三角形或三角形结构。
为了不阻挡风扇2与蜗壳1侧壁之间的气流,使风扇旋转产生的气流能从风扇与蜗壳侧壁之间流出,导流装置沿风扇2的径向的长度小于风扇2的直径。
如图2、3所示,在本实施例中,导流装置为倒T形,倒T形导流装置5包括底板及与底板连接且位于底板中部的竖部,底板的底面朝向风扇2,底板的顶面朝向蜗壳出风口,竖部连接于底板顶面,竖部的自由端背离底板且朝向蜗壳出风口。竖部垂直于底板底面。
为了使蜗壳内的气流流动顺畅,不产生啸叫或震动,倒T形导流装置的底面为弧面,弧面沿风扇外周延展。倒T形导流装置的底板的顶面为弧面。倒T形导流装置的底板的顶面与底面之间通过弧面过渡,如图4所示,此弧面的圆弧直径R为4-12mm,在本实施例中,R取8mm。
沿风扇的径向截面看,倒T形导流装置的竖部自其自由端向其与底板连接处通过斜面或者弧面过渡,形成类三角形结构,如采用弧面过渡,则此弧面为向内凹的弧面;倒T形导流装置的竖部自其自由端向其与底板连接处由窄逐渐变宽;竖部的自由端为弧形;倒T形导流装置的外廓整体呈圆滑轮廓。
如图4所示,倒T形导流装置底板的底面与风扇2外周间隙h为5-12mm。沿风扇的径向截面看,倒T形导流装置此方向的截面中,倒T形导流装置竖部的自由端的弧形圆心与底板的顶面与底面之间的左右两个弧形的圆心连线形成的夹角α的角度30-90度。在本实施例中,h取5mm,α取60度。
为了不阻挡风扇2与蜗壳1侧壁之间的气流,使风扇旋转产生的气流能从风扇与蜗壳侧壁之间流出,倒T形导流装置底板两端的距离小于风扇2的直径。
本发明干衣机,其内部的风机包括蜗壳和风扇,蜗壳内腔为对称结构,风扇位于蜗壳内腔且风扇中心设置于蜗壳内腔的对称轴线上,在风扇朝向蜗壳出风口的一侧设置有 导流装置且导流装置与风扇外周具有间隙,且导流装置为对称结构且其中心设置于蜗壳内腔的对称轴线上,通过导流装置,使风扇产生的气流主流沿导流装置一侧及其相对的蜗壳一侧壁流向加热装置,并且气流主流覆盖加热装置的绝大部分面积或全部,有较少的气流在碰到蜗壳的另一侧壁后折返向风扇方向流动,由于有导流装置,故此部分气流能在蜗壳的另一侧壁与导流装置的导引下重新加入风扇的旋转中,而不会在风扇与蜗壳出口间产生集聚的回流。由于在风扇朝向蜗壳出风口的一侧增加了导流装置,该结构可提高风压,根据下述公式,即提高下面公式中的风压ΔPstatic,而风压ΔPstatic的增加提高了风扇的效率。提高风压带来的好处是可增大克服系统阻力的能力,使尽可能多的热气流流向干衣机的滚筒内,由于负载量的多少与系统阻力成正比,从而提升了干衣机在较多负载的状况下的烘干效果,实现了干衣机在较多负载的状况下能较快较好烘干衣物。
Figure PCTCN2017070945-appb-000001
其中,ηFan为风扇效率,WAirPower为风扇输出功率,WShaftWork为风扇输入功率,
Q为风量,ΔPstatic为风压,ω为角速度,Tshaft为扭矩。
本发明干衣机,提高了风扇的流量与压力,从而实现了风机的效率提升,导流装置可以改善了加热装置温度分布不均匀的问题,提高了加热装置的利用效率,消除了加热装置局部过热的安全隐患,加热装置可以持续加热,不用频繁通断电,从而提高了烘干效率,缩短了烘干时间并且延长了电器元件寿命。
实施例二
本实施例与实施例一的区别在于:如图5所示,导流装置为三角形,三角形导流装置6三角形的底面朝向风扇2,三角形顶角朝向蜗壳1的出风口,三角形导流装置6的两腰与底面之间通过弧面过渡。三角形导流装置6的顶角为弧面形成的角。
在本实施例中,如图5所示,三角形导流装置的两腰为平面。在其他实施例中,如图6所示,三角形导流装置的两腰为弧面,且弧面为向外鼓的弧面。
上述实施例中的实施方案可以进一步组合或者替换,且实施例仅仅是对本发明的优选实施例进行描述,并非对本发明的构思和范围进行限定,在不脱离本发明设计思想的前提下,本领域中专业技术人员对本发明的技术方案作出的各种变化和改进,均属于本发明的保护范围。

Claims (10)

  1. 干衣机,其特征在于:其内部设置有风机,风机包括蜗壳和风扇,
    蜗壳内腔为对称结构,风扇位于蜗壳内腔且风扇中心设置于蜗壳内腔的对称轴线上,在风扇朝向蜗壳出风口的一侧设置有导流装置且导流装置与风扇外周具有间隙,且导流装置为对称结构且其中心设置于蜗壳内腔的对称轴线上。
  2. 根据权利要求1所述的干衣机,其特征在于:沿风扇的径向看,导流装置朝向风扇的一端长,朝向风扇的一端短,形成类三角形或三角形结构。
  3. 根据权利要求2所述的干衣机,其特征在于:导流装置沿风扇的径向的长度小于风扇直径。
  4. 根据权利要求1-3任一项所述的干衣机,其特征在于:导流装置为倒T形,包括底板及与底板连接且位于底板中部的竖部,
    底板的底面朝向风扇,竖部的自由端背离底板且朝向蜗壳出风口,竖部垂直于底板底面。
  5. 根据权利要求4所述的干衣机,其特征在于:倒T形导流装置的底面为弧面,弧面沿风扇外周延展。
  6. 根据权利要求4所述的干衣机,其特征在于:倒T形导流装置的竖部自其自由端向其与底板连接处通过斜面或者弧面过渡,竖部自其自由端向其与底板连接处由窄逐渐变宽;竖部的自由端为弧形。
  7. 根据权利要求6所述的干衣机,其特征在于:倒T形导流装置的底板的顶面为弧面;倒T形导流装置的底板的顶面与底面之间通过弧面过渡。
  8. 根据权利要求7所述的干衣机,其特征在于:倒T形导流装置竖部的自由端的弧形圆心与底板的顶面与底面之间的左右两个弧形的圆心连线形成的夹角α的角度30-90度。
  9. 根据权利要求1-3任一项所述的干衣机,其特征在于:导流装置为三角形,三角形的底面朝向风扇,三角形顶角朝向蜗壳出风口,三角形导流装置的两腰与底面之间通过弧面过渡。
  10. 根据权利要求9所述的干衣机,其特征在于:三角形导流装置的顶角为弧面;三角形导流装置的两腰为平面或弧面,且弧面为向外鼓的弧面。
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