WO2020233470A1 - 离心风机和干衣机 - Google Patents

离心风机和干衣机 Download PDF

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Publication number
WO2020233470A1
WO2020233470A1 PCT/CN2020/090027 CN2020090027W WO2020233470A1 WO 2020233470 A1 WO2020233470 A1 WO 2020233470A1 CN 2020090027 W CN2020090027 W CN 2020090027W WO 2020233470 A1 WO2020233470 A1 WO 2020233470A1
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WO
WIPO (PCT)
Prior art keywords
volute tongue
impeller
centrifugal fan
limit position
wall
Prior art date
Application number
PCT/CN2020/090027
Other languages
English (en)
French (fr)
Inventor
李涛
吕佩师
邴进东
成荣锋
杨龙
Original Assignee
青岛海尔滚筒洗衣机有限公司
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 青岛海尔滚筒洗衣机有限公司, 海尔智家股份有限公司 filed Critical 青岛海尔滚筒洗衣机有限公司
Priority to US17/613,618 priority Critical patent/US11898573B2/en
Priority to EP20810619.5A priority patent/EP3974654A4/en
Publication of WO2020233470A1 publication Critical patent/WO2020233470A1/zh

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—Centrifugal pumps
    • F04D17/16—Centrifugal pumps for displacing without appreciable compression
    • 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
    • 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 
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
    • F04D17/08—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
    • 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
    • F04D29/40—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
    • 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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable 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
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/462—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps
    • F04D29/464—Fluid-guiding means, e.g. diffusers adjustable especially adapted for elastic fluid pumps adjusting flow cross-section, otherwise than by using adjustable stator blades
    • 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
    • F04D29/46—Fluid-guiding means, e.g. diffusers adjustable
    • F04D29/48—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible pumps
    • F04D29/483—Fluid-guiding means, e.g. diffusers adjustable for unidirectional fluid flow in reversible 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
    • F04D29/26—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

Definitions

  • the invention belongs to the technical field of fans, and specifically provides a centrifugal fan and a clothes dryer.
  • the centrifugal fan is based on the principle of converting kinetic energy into potential energy, using a high-speed rotating impeller to accelerate the gas, then decelerate, change the flow direction, and convert kinetic energy into potential energy.
  • the centrifugal fan includes a motor, a casing, and an impeller arranged in the casing.
  • the motor can drive the impeller to rotate at a high speed to accelerate the gas.
  • a volute tongue is provided at the air outlet of the casing. The worm tongue can cut the airflow drawn by the impeller to make the airflow Exhaust from the air outlet.
  • the centrifugal fan needs to be able to achieve forward and reverse rotation.
  • clothes dryers Take clothes dryers as an example.
  • existing clothes dryers usually use a motor to simultaneously drive the drying drum and the impeller of the centrifugal fan to rotate.
  • the problem of entanglement in the drying drum During the working process of the dryer, the drying drum needs to be reversed.
  • the impeller rotates in the forward direction of the drying drum (the design direction of the centrifugal fan)
  • the worm tongue can cut the impeller driven
  • the airflow causes the airflow to be discharged from the air outlet.
  • the present invention provides a centrifugal fan.
  • the centrifugal fan includes a housing, a driving mechanism, and an impeller and a volute tongue arranged in the housing.
  • the housing is provided with an air inlet and an air outlet, and the driving mechanism Connected with the volute tongue and capable of driving the volute tongue to rotate between a first limit position and a second limit position, the volute tongue includes a first volute tongue portion and a second volute tongue portion, and the impeller is arranged at When rotating, air can be sucked into the housing from the air inlet, and the volute tongue is set to be able to cut the air blown from the impeller when it is in the first limit position and the impeller rotates in the forward direction.
  • the volute tongue is also arranged to cut the air blown from the impeller and guide the air to the air outlet when it is in the second limit position and the impeller rotates in the reverse direction ,
  • the first limit position is a position where the first volute tongue part seals against a side inner wall of the housing
  • the second limit position is a position where the second volute tongue part and the housing The position where the inner wall of the other side of the body is sealed against.
  • a first sealing structure is provided on one inner wall of the casing
  • a second sealing structure is provided on the other inner wall of the casing
  • the volute tongue is located in the In the first extreme position, the first volute tongue is sealed against the first sealing structure, and when the worm tongue is in the second extreme position, the second volute tongue is sealed to the second sealing structure Lean against.
  • the first sealing structure is a first sealing protrusion formed on an inner wall of one side of the casing.
  • the second sealing structure is a second sealing protrusion formed on the inner wall of the other side of the casing.
  • the impeller includes a plurality of straight blades arranged in a ring shape.
  • the plurality of straight blades are all arranged along the radial direction of the impeller.
  • the impeller includes a plurality of arc-shaped blades arranged in a ring shape.
  • the driving mechanism includes a driving member and a transmission member, the driving member is connected with the housing, the driving member is connected with the volute tongue through the transmission member, and the The driving member can drive the transmission member to drive the volute tongue to rotate.
  • the driving member is a motor
  • the transmission member is a transmission belt
  • one end of the transmission belt is connected with the output shaft of the motor
  • the other end of the transmission belt is connected with the worm tongue .
  • the present invention also provides a clothes dryer, which includes the above-mentioned centrifugal fan.
  • a rotatable volute tongue is provided in the housing of the centrifugal fan.
  • the volute tongue includes a first volute tongue portion and a second volute tongue portion.
  • the tongue can rotate between the first limit position and the second limit position.
  • the second worm tongue can cut the air blown from the impeller and lead the air out.
  • the air outlet when the volute tongue is in the second limit position and the impeller rotates in the reverse direction, the first volute tongue can cut the air blown from the impeller and guide the air to the air outlet.
  • the centrifugal fan is in the forward direction of the impeller.
  • the volute tongue When the volute tongue is in the first limit position, the first volute tongue is sealed against one side inner wall of the housing, which can prevent air from flowing back along the side inner wall. In the same way, when the volute tongue is in the second limit position, the second volute tongue is sealed against the inner wall of the other side of the housing, thereby preventing the air from flowing back along the inner wall of the side and improving the stability of air flow.
  • a first sealing structure is provided on one inner wall of the housing, and a second sealing structure is provided on the other inner wall of the housing.
  • first sealing structure is provided on the inner wall of one side of the housing
  • second sealing structure is provided on the other inner wall of the housing.
  • a plurality of straight blades are all arranged along the radial direction of the impeller. Through this arrangement, the centrifugal fan can blow out the same amount of wind when the impeller rotates forward and backward.
  • the clothes dryer provided by the present invention on the basis of the above technical solution adopts the above-mentioned centrifugal fan and thus has the technical effects of the above-mentioned centrifugal fan.
  • the dryer of the present invention The clothes machine can provide sufficient air volume when the drying drum rotates forward and backward, thereby improving the drying effect of clothes.
  • Fig. 1 is a first structural diagram of the centrifugal fan of the present invention
  • FIG. 2 is a second structural diagram of the centrifugal fan of the present invention.
  • FIG. 3 is a third structural diagram of the centrifugal fan of the present invention.
  • FIG. 4 is a fourth structural diagram of the centrifugal fan of the present invention.
  • FIG. 5 is the fifth structural schematic diagram of the centrifugal fan of the present invention.
  • FIG. 6 is a sixth structural diagram of the centrifugal fan of the present invention.
  • Figure 7 is a schematic view of the structure of the centrifugal fan of the present invention.
  • FIG 8 is the eighth structural diagram of the centrifugal fan of the present invention.
  • the terms “upper”, “lower”, “top”, “bottom”, “inner”, “outer”, “clockwise”, “counterclockwise” and the like indicate directions or The term of positional relationship is based on the direction or positional relationship shown in the drawings, which is only for ease of description, and does not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood To limit the present invention.
  • the terms “first” and “second” are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance.
  • connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between two components.
  • connection can also be a detachable connection or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be a connection between two components.
  • the volute tongue of the existing centrifugal fan cannot cut the air flow drawn by the impeller when the rotation direction of the impeller is opposite to the design direction, which leads to the problem that the air output of the centrifugal fan is sharply reduced.
  • the invention provides a centrifugal fan and a clothes dryer, aiming to enable the volute tongue of the centrifugal fan to cut the air flow induced by the impeller when the impeller rotates in the forward and reverse directions, and to ensure the demand for air volume.
  • the centrifugal fan of the present invention includes a housing 1, a driving mechanism, and an impeller 2 and a volute tongue 3 arranged in the housing 1.
  • the housing 1 is provided with an air inlet 4 and an outlet
  • the tuyere 5 the driving mechanism is connected with the worm tongue 3 and can drive the worm tongue 3 to rotate between the first limit position and the second limit position.
  • the worm tongue 3 includes a first worm tongue portion 31 and a second worm tongue portion 32, and an impeller 2 It is set to suck air into the housing 1 from the air inlet 4 when rotating, and the volute tongue 3 is set to cut the air blown from the impeller 2 when the impeller 2 is in the first limit position and the impeller 2 is rotating forward and guide the air out
  • the tuyere 5 and the volute tongue 3 are also set to cut the air blown from the impeller 2 and guide the air to the outlet 5 when the impeller 2 is in the second limit position and the impeller 2 rotates in the reverse direction.
  • the first limit position is the first worm The position where the tongue 31 is sealed against the inner wall of one side of the housing 1, and the second limit position is the position where the second volute tongue 32 is sealed against the inner wall of the other side of the housing 1.
  • the volute tongue 3 shown is in the first limit position. At this time, the first volute tongue portion 31 seals against the first side inner wall 11 of the housing 1, and the impeller 2 rotates in the forward direction (clockwise rotation as seen in the figure).
  • the second volute tongue portion 32 can cut the air blown from the impeller 2 and guide the air to the air outlet 5, and since the first volute tongue portion 31 is sealed against the first side inner wall 11 of the housing 1, It can prevent air from flowing back along the first side inner wall 11; the volute tongue 3 shown in FIG.
  • the volute tongue 3 is in the second limit position, at this time, the second volute tongue portion 32 is sealed against the second side inner wall 12 of the housing 1
  • the first volute tongue 31 can cut the air blown from the impeller 2 and guide the air to the air outlet 5, and because of the second volute tongue 32 and the second side inner wall 12 of the housing 1 are sealed and abutted, which can prevent air from flowing back along the second side inner wall 12.
  • the centrifugal fan can ensure sufficient air volume when the impeller 2 rotates in the forward and reverse directions.
  • the volute tongue 3 can be driven by a driving mechanism when it rotates from the first limit position to the second limit position.
  • the driving mechanism can be set as a hydraulic driving mechanism or a motor driving mechanism, etc., which affects the specific type and structure of the driving mechanism. Adjustments and changes do not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
  • the volute tongue 3 when the volute tongue 3 is in the first limit position or the second limit position, the volute tongue 3 needs to be fixed under the impact of the airflow.
  • the drive mechanism has a locking function.
  • the drive mechanism can adopt a self-locking motor, and the lock can be realized by self-locking the motor. That is, when the drive mechanism rotates the worm tongue 3 to the first limit position, the worm tongue can be turned 3 is fixed at the first limit position. Similarly, when the drive mechanism rotates the worm tongue 3 to the second limit position, the worm tongue 3 can be fixed at the second limit position.
  • a magnetic attraction structure is provided on the side inner wall of the volute tongue 3 and/or the housing 1.
  • the volute tongue 3 When the volute tongue 3 is in the first limit position, the first volute tongue portion 31 is attracted by the magnetic attraction structure. On the first side inner wall 11 of the housing 1, similarly, when the volute tongue 3 is at the second limit position, the second volute tongue portion 32 is adsorbed on the second side inner wall 12 of the housing 1 through a magnetic adsorption structure.
  • the above two situations are only exemplary and cannot constitute a limitation to the present invention.
  • the drive mechanism includes a drive member 6 and a transmission member 7.
  • the drive member 6 is connected to the housing 1, and the drive member 6 is connected to the worm tongue 3 through the drive member 7, and the drive member 6 can drive
  • the transmission member 7 drives the worm tongue 3 to rotate.
  • the driving member 6 is a motor
  • the transmission member 7 is a transmission belt
  • one end of the transmission belt is connected with the output shaft of the motor
  • the other end of the transmission belt is connected with the worm tongue 3.
  • a rotating shaft 8 is provided on the worm tongue 3, the bottom of the rotating shaft 8 is rotatably connected with the bottom plate 13 of the housing 1, the top of the rotating shaft 8 is rotatably connected with the top plate 14 of the housing 1, and the top of the rotating shaft 8 is provided There is a turntable 9, one end of the transmission belt is connected with the output shaft of the motor, and the other end of the transmission belt is connected with the turntable 9.
  • the motor drives the transmission belt to move.
  • the top of the worm tongue 3 is provided with a first rotating shaft
  • the bottom plate 13 of the housing 1 is provided with a second rotating shaft
  • the bottom of the worm tongue 3 is provided with a shaft hole adapted to the second rotating shaft.
  • the transmission belt is connected with the output shaft of the motor, and the other end of the transmission belt is connected with the first rotation shaft.
  • the motor drives the transmission belt to move, the transmission belt drives the first rotation shaft to rotate, and the first rotation shaft drives the worm tongue 3 to rotate.
  • the transmission member 7 can also be configured as other transmission structures such as gears. This adjustment and change of the specific structure of the transmission member 7 does not deviate from the principle and scope of the present invention, and should be limited to the protection scope of the present invention. .
  • a first sealing structure is provided on one inner wall of the housing 1, and a second sealing structure is provided on the other inner wall of the housing 1, and the volute tongue 3 is at the first limit.
  • the first volute tongue portion 31 sealingly abuts against the first sealing structure in the position
  • the second volute tongue portion 32 sealingly abuts against the second sealing structure when the volute tongue 3 is in the second limit position.
  • a first sealing structure is provided on the first side inner wall 11 of the housing 1, and the first sealing structure is a first sealing protrusion 111 formed on the first side inner wall 11.
  • the first sealing structure can also be configured as a sealing plate or a sealing rib fixed on the first side inner wall 11.
  • the second sealing structure can also be configured as a sealing plate or a sealing plate fixed on the second side inner wall 12.
  • the volute tongue 3 can also be maintained at the first limit position and the second limit position.
  • the volute tongue 3 At a certain position between the extreme positions, for example, as shown in Figure 6, the volute tongue 3 is between the first extreme position and the second extreme position, and the volute tongue 3 is in this position (the dotted line in Figure 6 3), the distance between the second worm tongue 32 and the impeller 2 is increased when the distance between the second worm tongue 32 and the impeller 2 is at the first extreme position relative to the worm tongue 3, so that The cutting effect of the second volute tongue 32 on the air flow is weakened, thereby reducing noise.
  • the air volume will be correspondingly reduced, so it is suitable for applications that require a small air volume.
  • the volute tongue 3 can be maintained at any position between the first limit position and the second limit position through the motor self-locking.
  • the impeller 2 includes a plurality of straight blades 21 arranged in a ring shape.
  • the plurality of straight blades 21 are all arranged along the radial direction of the impeller 2.
  • the centrifugal fan can blow out the same amount of wind when the impeller 2 rotates forward and backward.
  • a plurality of straight blades 21 and the impeller 2 can also be arranged at a specific included angle in the radial direction.
  • the impeller 2 includes a plurality of arc-shaped blades 22 arranged in a ring shape.
  • the forward and reverse rotation of the impeller 2 can bring about two working modes with emphasis on performance and efficiency.
  • the impeller 2 rotates forward (clockwise from the figure). When rotating), the outlet angle of the arc-shaped blades 22 faces the direction of rotating wind.
  • the impeller 2 works in the forward blade mode, and the impeller 2 can provide greater air pressure; and when the impeller 2 rotates in the reverse direction (as seen from the figure, When rotating counterclockwise), as shown in Figure 8, the exit angle of the arc blade 22 is opposite to the direction of the rotating wind.
  • the impeller 2 works in the backward blade mode.
  • the air pressure that the impeller 2 can provide is less than the forward blade mode, but this works Mode can provide higher aerodynamic efficiency.
  • the specific shape of the blade is not limited to the above-mentioned straight blades and arc blades, the blades can also be set in other shapes, for example, the blades can also be set as "V"-shaped blades or "L"-shaped blades. And so on, the adjustment and change of the specific shape of the blade does not deviate from the principle and scope of the present invention, and should be limited within the protection scope of the present invention.
  • the present invention also provides a clothes dryer, which includes the above-mentioned centrifugal fan.

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

Abstract

一种离心风机和干衣机，离心风机包括壳体（1）、驱动机构以及设置在壳体（1）中的叶轮（2）和蜗舌（3），驱动机构与蜗舌（3）连接并能够驱动蜗舌（3）在第一极限位置和第二极限位置之间转动，蜗舌（3）包括第一蜗舌部（31）和第二蜗舌部（32），蜗舌（3）处于第一极限位置并且叶轮（2）正向转动时，第一蜗舌部（32）与壳体（1）的一侧内壁（11）密封抵靠，第二蜗舌部（32）能够将叶轮（2）吹过来的空气切割，蜗舌（3）处于第二极限位置并且叶轮（2）反向转动时，第二蜗舌部（32）与壳体（1）的另一侧内壁（12）密封抵靠，第一蜗舌部（31）能够将叶轮（2）吹过来的空气切割。该离心风机在叶轮（2）正向和反向转动时均能够保证有足够的风量；并且，通过蜗舌部与壳体（1）侧内壁密封抵靠，能够在壳体（1）内形成封闭空间，防止空气回流。

Description

离心风机和干衣机 技术领域
本发明属于风机技术领域，具体提供一种离心风机和干衣机。
背景技术
离心风机是根据动能转换为势能的原理，利用高速旋转的叶轮将气体加速，然后减速、改变流向，使动能转换成势能。离心风机包括电机、壳体以及设置在壳体内的叶轮，电机能够驱动叶轮高速转动，以将气体加速，在壳体的出风口处设置有蜗舌，蜗舌可以切割叶轮引动的气流，使气流从出风口排出。
在一些场合中，需要离心风机能够实现正反转，以干衣机为例，为了降低成本，现有的干衣机通常采用一个电机同时驱动烘干筒和离心风机的叶轮旋转，为了解决衣物在烘干筒内缠绕的问题，在干衣机工作过程中，烘干筒需要正反转，叶轮随着烘干筒正向(离心风机的设计方向)转动时，蜗舌可以切割叶轮引动的气流，使气流从出风口排出，然而，当叶轮随着烘干筒反向(与设计方向相反)转动时，蜗舌无法切割叶轮引动的气流，导致从出风口处排出的风量急剧减小，从而影响对衣物的烘干效果。
因此，本领域需要一种新的离心风机和干衣机来解决上述问题。
发明内容
为了解决现有技术中的上述问题，即为了解决现有离心风机的蜗舌在叶轮的转动方向与设计方向相反时无法切割叶轮引动的气流，从而导致离心风机的出风量急剧减小的问题，本发明提供了一种离心风机，所述离心风机包括壳体、驱动机构以及设置在所述壳体中的叶轮和蜗舌，所述壳体上设置有进风口和出风口，所述驱动机构与所述蜗舌连接并能够驱动所述蜗舌在第一极限位置和第二极限位置之间转动，所述 蜗舌包括第一蜗舌部和第二蜗舌部，所述叶轮设置为在转动时能够将空气由所述进风口吸入所述壳体，所述蜗舌设置为在处于所述第一极限位置并且所述叶轮正向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，所述蜗舌还设置为在处于所述第二极限位置并且所述叶轮反向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，其中，所述第一极限位置为所述第一蜗舌部与所述壳体的一侧内壁密封抵靠的位置，所述第二极限位置为所述第二蜗舌部与所述壳体的另一侧内壁密封抵靠的位置。
在上述离心风机的优选技术方案中，所述壳体的一侧内壁上设置有第一密封结构，所述壳体的另一侧内壁上设置有第二密封结构，所述蜗舌处于所述第一极限位置时所述第一蜗舌部与所述第一密封结构密封抵靠，所述蜗舌处于所述第二极限位置时所述第二蜗舌部与所述第二密封结构密封抵靠。
在上述离心风机的优选技术方案中，所述第一密封结构为形成在所述壳体的一侧内壁上的第一密封凸起。
在上述离心风机的优选技术方案中，所述第二密封结构为形成在所述壳体的另一侧内壁上的第二密封凸起。
在上述离心风机的优选技术方案中，所述叶轮包括呈环形设置的多个直叶片。
在上述离心风机的优选技术方案中，所述多个直叶片均沿所述叶轮的径向设置。
在上述离心风机的优选技术方案中，所述叶轮包括呈环形设置的多个弧形叶片。
在上述离心风机的优选技术方案中，所述驱动机构包括驱动构件和传动构件，所述驱动构件与所述壳体连接，所述驱动构件通过所述传动构件与所述蜗舌连接，所述驱动构件能够驱动所述传动构件以带动所述蜗舌转动。
在上述离心风机的优选技术方案中，所述驱动构件为电机，所述传动构件为传动带，所述传动带的一端与所述电机的输出轴连接，所述传动带的另一端与所述蜗舌连接。
在另一方面，本发明还提供了一种干衣机，该干衣机包括上述的离心风机。
本领域技术人员能够理解的是，在本发明的优选技术方案中，通过在离心风机的壳体内设置一个可以转动的蜗舌，该蜗舌包括第一蜗舌部和第二蜗舌部，蜗舌可以在第一极限位置和第二极限位置之间转动，当蜗舌处于第一极限位置且叶轮正向转动时，第二蜗舌部能够将叶轮吹过来的空气切割并将空气引向出风口，当蜗舌处于第二极限位置且叶轮反向转动时，第一蜗舌部能够将叶轮吹过来的空气切割并将空气引向出风口，通过这样的设置，使得离心风机在叶轮正向和反向转动时均能够保证有足够的风量；并且，蜗舌处于第一极限位置时，第一蜗舌部与壳体的一侧内壁密封抵靠，从而能够防止空气沿着该侧内壁回流，同理，蜗舌处于第二极限位置时，第二蜗舌部与壳体的另一侧内壁密封抵靠，从而能够防止空气沿着该侧内壁回流，提高了空气流动的稳定性。
进一步地，壳体的一侧内壁上设置有第一密封结构，壳体的另一侧内壁上设置有第二密封结构，蜗舌处于第一极限位置时第一蜗舌部与第一密封结构密封抵靠，蜗舌处于第二极限位置时第二蜗舌部与第二密封结构密封抵靠。通过在壳体的一侧内壁上设置第一密封结构，使第一蜗舌部与第一密封结构密封抵靠，能够提高第一蜗舌部与该侧内壁的密封性，同理，通过在壳体的另一侧内壁上设置第二密封结构，使第二蜗舌部与第二密封结构密封抵靠，能够提高第二蜗舌部与该侧内壁的密封性。
进一步地，多个直叶片均沿叶轮的径向设置。通过这样的设置，使得离心风机在叶轮正向和反向转动时能够吹出等量的风。
此外，本发明在上述技术方案的基础上进一步提供的干衣机由于采用了上述离心风机，进而具备了上述离心风机所具备的技术效果，相比于改进前的干衣机，本发明的干衣机能够在烘干筒正向和反向转动时均提供足够的风量，从而能够提高对衣物的烘干效果。
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是本发明的离心风机的结构示意图一；
图2是本发明的离心风机的结构示意图二；
图3是本发明的离心风机的结构示意图三；
图4是本发明的离心风机的结构示意图四；
图5是本发明的离心风机的结构示意图五；
图6是本发明的离心风机的结构示意图六；
图7是本发明的离心风机的结构示意图七；
图8是本发明的离心风机的结构示意图八。
具体实施方式
首先，本领域技术人员应当理解的是，下面描述的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”、“顶”、“底”、“内”、“外”、“顺时针”、“逆时针”等指示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”、“相连”、“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，或一体连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，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。
基于背景技术指出的现有离心风机的蜗舌在叶轮的转动方向与设计方向相反时无法切割叶轮引动的气流，从而导致离心风机的出风量急剧减小的问题。本发明提供了一种离心风机及干衣机，旨在使离心风机的蜗舌在叶轮正向和反向转动时均能够切割叶轮引动的气流，保证对风量的需求。
具体地，如图1至图3所示，本发明的离心风机包括壳体1、驱动机构以及设置在壳体1中的叶轮2和蜗舌3，壳体1上设置有进风口 4和出风口5，驱动机构与蜗舌3连接并能够驱动蜗舌3在第一极限位置和第二极限位置之间转动，蜗舌3包括第一蜗舌部31和第二蜗舌部32，叶轮2设置为在转动时能够将空气由进风口4吸入壳体1，蜗舌3设置为在处于第一极限位置并且叶轮2正向转动时能够将叶轮2吹过来的空气切割并将空气引向出风口5，蜗舌3还设置为在处于第二极限位置并且叶轮2反向转动时能够将叶轮2吹过来的空气切割并将空气引向出风口5，其中，第一极限位置为第一蜗舌部31与壳体1的一侧内壁密封抵靠的位置，第二极限位置为第二蜗舌部32与壳体1的另一侧内壁密封抵靠的位置，具体而言，图2中所示的蜗舌3正处于第一极限位置，此时，第一蜗舌部31与壳体1的第一侧内壁11密封抵靠，叶轮2正向转动(从图中看为顺时针转动)时，第二蜗舌部32能够将叶轮2吹过来的空气切割并将空气引向出风口5，并且，由于第一蜗舌部31与壳体1的第一侧内壁11密封抵靠，能够避免空气沿着第一侧内壁11回流；图3中所示的蜗舌3正处于第二极限位置，此时，第二蜗舌部32与壳体1的第二侧内壁12密封抵靠，叶轮2反向转动(从图中看为逆时针转动)时，第一蜗舌部31能够将叶轮2吹过来的空气切割并将空气引向出风口5，并且，由于第二蜗舌部32与壳体1的第二侧内壁12密封抵靠，能够避免空气沿着第二侧内壁12回流。通过调整蜗舌3的位置，使得离心风机在叶轮2正向和反向转动时均能够保证有足够的风量。其中，蜗舌3由第一极限位置转动到第二极限位置可以通过驱动机构进行驱动，驱动机构可以设置为液压驱动机构或者电机驱动机构等等，这种对驱动机构的具体类型和结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
此外，需要说明的是，当蜗舌3处于第一极限位置或者第二极限位置时，需要使蜗舌3能够在气流的冲击作用固定不动。在一种可能的情形中，驱动机构具有锁定功能，例如驱动机构可以采用自锁电机，通过电机自锁实现锁定，即当驱动机构使蜗舌3转动到第一极限位置后，能够使蜗舌3在第一极限位置处固定不动，同样地，当驱动机构使蜗舌3转动到第二极限位置后，能够使蜗舌3在第二极限位置处固定不动。在另一种可能的情形中，在蜗舌3和/或壳体1的侧内壁上设置磁吸附结构，当蜗舌3处于第一极限位置时，第一蜗舌部31通过磁吸附结构吸附在壳 体1的第一侧内壁11上，同样地，当蜗舌3处于第二极限位置时，第二蜗舌部32通过磁吸附结构吸附在壳体1的第二侧内壁12上。当然，上述的两种情形仅是示例性的，并不能构成对本发明的限定。
优选地，如图1和图2所示，驱动机构包括驱动构件6和传动构件7，驱动构件6与壳体1连接，驱动构件6通过传动构件7与蜗舌3连接，驱动构件6能够驱动传动构件7以带动蜗舌3转动。其中，驱动构件6为电机，传动构件7为传动带，传动带的一端与电机的输出轴连接，传动带的另一端与蜗舌3连接。在一种可能的情形中，蜗舌3上设置有转轴8，转轴8的底部与壳体1的底板13转动连接，转轴8的顶部与壳体1的顶板14转动连接，转轴8的顶部设置有转盘9，传动带的一端与电机的输出轴连接，传动带的另一端与转盘9连接，电机驱动传动带移动，传动带带动转盘9转动，转盘9带动转轴8转动，转轴8带动蜗舌3转动。在另一种可能的情形中，蜗舌3的顶部设置有第一转轴，壳体1的底板13上设置有第二转轴，蜗舌3的底部设置有与第二转轴相适配的轴孔，传动带的一端与电机的输出轴连接，传动带的另一端与第一转轴连接，电机驱动传动带移动，传动带带动第一转轴转动，第一转轴带动蜗舌3转动。上述的两种情形仅是示例性的，并不构成对本发明的限定。此外，传动构件7还可以设置为齿轮等其他传动结构，这种对传动构件7的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图2至图5所示，壳体1的一侧内壁上设置有第一密封结构，壳体1的另一侧内壁上设置有第二密封结构，蜗舌3处于第一极限位置时第一蜗舌部31与第一密封结构密封抵靠，蜗舌3处于第二极限位置时第二蜗舌部32与第二密封结构密封抵靠。其中，壳体1的第一侧内壁11上设置有第一密封结构，第一密封结构为形成在第一侧内壁11上的第一密封凸起111，蜗舌3处于第一极限位置时，第一蜗舌部31与第一密封凸起111密封抵靠，壳体1的第二侧内壁12上设置有第二密封结构，第二密封结构为形成在第二侧内壁12上的第二密封凸起121，蜗舌3处于第二极限位置时，第二蜗舌部32与第二密封凸起121密封抵靠。当然，第一密封结构也可以设置为固定在第一侧内壁11上的密封板或者密封筋等结构，同理，第二密封结构也可以设置为固定在第二侧内 壁12上的密封板或者密封筋等结构，这种对第一密封结构和第二密封结构的具体结构形式的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
此外，需要说明是，在实际应用中，蜗舌3除了保持在第一极限位置和第二极限位置外，在一些特殊的需求下，还可以使蜗舌3保持在第一极限位置和第二极限位置之间的某个位置上，例如，如图6所示，此时的蜗舌3处于第一极限位置和第二极限位置之间，蜗舌3在该位置(图6中虚线蜗舌3所处的位置)时，由于第二蜗舌部32与叶轮2之间的距离相对于蜗舌3处于第一极限位置时第二蜗舌部32与叶轮2之间的距离增加了，使得第二蜗舌部32对气流的切割作用变弱，从而减小了噪声，当然，风量也会相应的减小，所以适合应用于需要较小风量的情形。需要说明的是，可以通过电机自锁使蜗舌3保持在第一极限位置和第二极限位置之间的任意位置上。
优选地，如图2和图3所示，叶轮2包括呈环形设置的多个直叶片21。在一种优选的情形中，多个直叶片21均沿叶轮2的径向设置，通过这样的设置，在叶轮2正向和反向转动时，离心风机能够吹出等量的风。当然，在实际应用中，根据具体情况，也可以使多个直叶片21与叶轮2的径向呈特定夹角设置，这种灵活地调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
优选地，如图7和图8所示，叶轮2包括呈环形设置的多个弧形叶片22。在这种情形下，叶轮2正向和反向转能够带来偏重性能和偏重效率的两种工作模式，例如，在图7的设置中，叶轮2正向转动(从图中看为顺时针转动)时，弧形叶片22出口角度朝向旋转出风方向，此时叶轮2工作在前向叶片模式，叶轮2能够提供更大的气流压力；而当叶轮2反向转动(从图中看为逆时针转动)时，如图8所示，弧形叶片22出口角度与旋转出风方向相反，叶轮2工作在后向叶片模式，叶轮2能够提供的气流压力小于前向叶片模式，但是此工作模式能够提供更高的气动效率。
需要说明的是，叶片的具体形状并不局限于上述的直叶片和弧形叶片，叶片还可以设置为其他的形状，例如，还可以将叶片设置为 “V”形叶片或者“L”形叶片等等，这种对叶片的具体形状的调整和改变并不偏离本发明的原理和范围，均应限定在本发明的保护范围之内。
最后，本发明还提供了一种干衣机，该干衣机包括上述的离心风机。
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. 一种离心风机，其特征在于，所述离心风机包括壳体、驱动机构以及设置在所述壳体中的叶轮和蜗舌，所述壳体上设置有进风口和出风口，所述驱动机构与所述蜗舌连接并能够驱动所述蜗舌在第一极限位置和第二极限位置之间转动，所述蜗舌包括第一蜗舌部和第二蜗舌部，所述叶轮设置为在转动时能够将空气由所述进风口吸入所述壳体，所述蜗舌设置为在处于所述第一极限位置并且所述叶轮正向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，所述蜗舌还设置为在处于所述第二极限位置并且所述叶轮反向转动时能够将所述叶轮吹过来的空气切割并将空气引向所述出风口，
    其中，所述第一极限位置为所述第一蜗舌部与所述壳体的一侧内壁密封抵靠的位置，所述第二极限位置为所述第二蜗舌部与所述壳体的另一侧内壁密封抵靠的位置。
  2. 根据权利要求1所述的离心风机，其特征在于，所述壳体的一侧内壁上设置有第一密封结构，所述壳体的另一侧内壁上设置有第二密封结构，所述蜗舌处于所述第一极限位置时所述第一蜗舌部与所述第一密封结构密封抵靠，所述蜗舌处于所述第二极限位置时所述第二蜗舌部与所述第二密封结构密封抵靠。
  3. 根据权利要求2所述的离心风机，其特征在于，所述第一密封结构为形成在所述壳体的一侧内壁上的第一密封凸起。
  4. 根据权利要求2所述的离心风机，其特征在于，所述第二密封结构为形成在所述壳体的另一侧内壁上的第二密封凸起。
  5. 根据权利要求1所述的离心风机，其特征在于，所述叶轮包括呈环形设置的多个直叶片。
  6. 根据权利要求5所述的离心风机，其特征在于，所述多个直叶片均沿所述叶轮的径向设置。
  7. 根据权利要求1所述的离心风机，其特征在于，所述叶轮包括呈环形设置的多个弧形叶片。
  8. 根据权利要求1至7中任一项所述的离心风机，其特征在于，所述驱动机构包括驱动构件和传动构件，所述驱动构件与所述壳体连接，所述驱动构件通过所述传动构件与所述蜗舌连接，所述驱动构件能够驱动所述传动构件以带动所述蜗舌转动。
  9. 根据权利要求8所述的离心风机，其特征在于，所述驱动构件为电机，所述传动构件为传动带，所述传动带的一端与所述电机的输出轴连接，所述传动带的另一端与所述蜗舌连接。
  10. 一种干衣机，其特征在于，所述干衣机包括权利要求1至9中任一项所述的离心风机。
PCT/CN2020/090027 2019-05-23 2020-05-13 离心风机和干衣机 WO2020233470A1 (zh)

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