CN110792636B - Air duct, fan assembly and clothes dryer - Google Patents
Air duct, fan assembly and clothes dryer Download PDFInfo
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- CN110792636B CN110792636B CN201810875431.0A CN201810875431A CN110792636B CN 110792636 B CN110792636 B CN 110792636B CN 201810875431 A CN201810875431 A CN 201810875431A CN 110792636 B CN110792636 B CN 110792636B
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- air
- air duct
- air outlet
- volute
- impeller
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- 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
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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
- D06F58/00—Domestic laundry dryers
- D06F58/20—General details of domestic laundry dryers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention provides an air duct, a fan assembly and a clothes dryer, wherein the air duct comprises: the volute is provided with a forward air outlet and a reverse air outlet; the airflow channel comprises a first air channel and a second air channel, the first air channel is communicated with the forward rotation air outlet, the second air channel is connected with the first air channel and the reverse rotation air outlet, and the reverse rotation air outlet is communicated with the first air channel when the second air channel is in an open state; and the air door component is arranged on the air flow channel and used for controlling the opening and closing of the second air channel. The wind channel that this scheme provided, compared with traditional wind channel, realize when satisfying the amount of wind under the impeller forward drive operating mode and not reduce the loss, can increase the amount of wind under the impeller reverse drive operating mode, also have the effectual advantage of silence simultaneously.
Description
Technical Field
The invention relates to the field of clothes dryers, in particular to an air duct, a fan assembly and a clothes dryer.
Background
The conventional clothes dryer has an impeller 140 and a rear air duct system, as shown in fig. 1, the rear air duct system includes a volute 110, a volute tongue 120 and an air flow channel 130, when the impeller 140 rotates forward (for example, when the impeller 140 rotates in a direction shown by a dotted arrow in fig. 1), the impeller 140 sends wind into the air flow channel 130 from the vicinity of the impeller 140 (for example, the wind flows in a direction shown by a dotted arrow in fig. 1), and then enters the drum of the clothes dryer through the air flow channel 130 for drying clothes, wherein the volute tongue 120 prevents the wind from rotating with the impeller 140, and plays a role of guiding the wind into the air flow channel 130 and increasing the flow rate. However, with the improvement of life quality of people, when a user dries high-grade clothes such as wool, the user needs to have a certain air volume when the impeller 140 rotates reversely, and for the existing impeller 140 and rear air duct system structure, as shown in fig. 2, when the impeller 140 rotates reversely (when the impeller 140 rotates in the direction shown by the dotted arrow in fig. 2), the wind direction goes downward, and the wind direction can specifically refer to the direction shown by the dotted arrow in fig. 2, at this time, the air volume at the airflow channel 130 is extremely low, and the air volume requirement when the impeller 140 rotates reversely cannot be met.
In order to solve the problem that the requirement of the reverse air output cannot be met, the prior art provides a structure in which the turning plate 150 is arranged on the volute 110, as shown in fig. 7, when the impeller 140 in the volute 110 rotates reversely, the turning plate 150 is opened, so that the volute 110 exhausts through the auxiliary air outlet controlled to be opened and closed by the turning plate 150, as shown in fig. 6, when the impeller 140 in the volute 110 rotates forwards, the turning plate 150 is in a closed state to block the auxiliary air outlet, and the volute 110 exhausts through the normally-opened volute air outlet, but for the structure, when the impeller 140 rotates forwards, high-speed airflow slightly lifts the turning plate 150 to cause untight blocking and small seam exposure, and the airflow generates great noise when passing through the small seam, thereby reducing the product use experience.
Disclosure of Invention
In order to solve at least one of the above technical problems, an object of the present invention is to provide an air duct.
Another object of the present invention is to provide a fan assembly having the above air duct.
Still another object of the present invention is to provide a clothes dryer having the above fan assembly.
To achieve the above object, an embodiment of a first aspect of the present invention provides an air duct, including: the volute is provided with a forward air outlet and a reverse air outlet; the airflow channel comprises a first air channel and a second air channel, the first air channel is communicated with the forward rotation air outlet, the second air channel is connected with the first air channel and the reverse rotation air outlet, and the reverse rotation air outlet is communicated with the first air channel when the second air channel is in an open state; and the air door component is arranged on the airflow channel and used for controlling the opening and closing of the second air channel.
It should be understood that the forward rotation air outlet may be an opening suitable for the volute to exhaust air when the impeller rotates forward, and the reverse rotation air outlet may be an opening suitable for the volute to exhaust air when the impeller rotates reversely, where it is worth explaining that the forward rotation and the reverse rotation of the impeller are two rotation forms with opposite rotation directions, and as for the specific forward rotation, a person skilled in the art may design the rotation to be clockwise rotation or counterclockwise rotation, and the reverse rotation to be counterclockwise rotation or clockwise rotation opposite to the forward rotation, as required.
In the air duct provided by the above embodiment of the present invention, the air flow channel includes the first air duct and the second air duct, when the impeller rotates forward in the volute, the air flow is discharged from the forward rotation air outlet and enters the first air duct for external discharge, when the impeller rotates backward in the volute, the air door component is controlled to open the second air duct, and the air flow is discharged from the reverse rotation air outlet and enters the first air duct for external discharge along the second air duct, so that the air volume under the condition of impeller reverse driving can be increased while the air volume under the condition of impeller forward driving is not reduced, and the air volume requirement under the condition of impeller reverse driving is met.
In addition, this scheme wind door part establishes and is used for controlling the second wind channel switching on airflow channel, switch on or cut off between first wind channel of corresponding control and the reversal air outlet, compare in setting up the structure that turns over the board on the spiral case, when this structure breaks off between realization control reversal air outlet and the first wind channel, can not produce the slit structure on the spiral case surface, the problem of leaking out when being difficult to appear breaking off between reversal air outlet and the first wind channel like this, and also can not be because of the slit structure produces the air noise in leading to the spiral case, generally speaking, the amount of wind is big when having realized the product just reversing, the effect that the noise is low simultaneously.
In addition, the air duct provided by the embodiment of the invention can also have the following additional technical characteristics:
in the above technical solution, the damper component includes: a hinge structure; and the turning plate is connected with the airflow channel through the hinge structure and can rotate around the hinge structure between a position for closing the second air channel and a position for opening the second air channel.
In this scheme, the board is turned over in the setting and is connected with airflow channel through hinge structure (like hinge, pivot etc.), has simple structure, the convenient advantage of equipment, and turns over the board and can rotate and dams the second wind channel with the form of blocking, seals effectually, and control is also comparatively reliable sensitive.
In the technical scheme, when the turning plate is located at the position for opening the second air duct, at least part of the turning plate extends into the first air duct, and when the airflow is driven by the impeller to rotate positively, the airflow is discharged from the positive rotation air outlet and flows along the first air duct, the turning plate can be driven to turn from the position for opening the second air duct to the position for closing the second air duct along the downwind direction.
In the scheme, when the turning plate is arranged at the position for opening the second air duct, at least part of the turning plate extends into the first air duct, thus, when the impeller rotates forwards, the air flow which is discharged from the forward rotation air outlet and flows along the first air duct can be utilized to act on the part of the turning plate extending into the first air duct, so that the air pressure can drive the turning plate to turn over from the position for opening the second air duct to the position for closing the second air duct along the downwind direction, thereby realizing the automatic control of closing the second air duct when the impeller rotates forwards, reducing the air exhaust volume from the second air duct when the impeller rotates forwards, leading the air flow in the volute to be mainly discharged along the forward rotation air outlet suitable for supplying the air for the impeller to rotate forwards, having small air exhaust resistance, high air exhaust efficiency and low air exhaust noise, and the structure does not need to control the turning plate to be closed by electric control or manual control, the structure is more simplified, and simultaneously, the product control flow is simplified, and the operation reliability is higher.
In the technical scheme, when the air flow is driven by the impeller to be reversely rotated, is discharged from the reverse air outlet and flows along the second air duct, the turning plate can be driven to turn from the position for closing the second air duct to the position for opening the second air duct along the downwind direction.
In this scheme, will turn over the board and set up to be discharged from the reversal air outlet and along the second wind channel position driven structure of opening the second wind channel from the position that seals the second wind channel to can be followed the wind direction by the air current when the air current is driven by the impeller reversal and flows, thereby automatic control second wind channel is opened when realizing the impeller reversal, thus, the air current mainly discharges along the reversal air outlet that is suitable for supplying the impeller reversal air-out in the spiral case when the impeller reversal, the resistance of airing exhaust is little, it is efficient to air exhaust, the noise of airing exhaust is low, and this structure need not automatically controlled or manual control and turns over the board and open, the structure is more simplified, simultaneously, also need not to detect the open and close state of turning over the board before the impeller work and judge and control, the product control.
In any of the above technical solutions, the damper component is disposed at a position where the second air duct is adjacent to the first air duct.
In this scheme, establish the air door part in the position department that the second wind channel is close to first wind channel, can make the air door part keep away from the spiral case as far as possible, like this, when realizing the disconnection between control reversal air outlet and the first wind channel, can not produce the slit structure on the spiral case, the easy problem of leaking out in slit department when the disconnection between reversal air outlet and the first wind channel can not appear like this, and can not lead to producing the air current noise in the spiral case because of the slit structure yet, thereby the amount of wind is big when realizing the product just reversing, the noise is low.
In any of the above technical solutions, a volute tongue is disposed at the forward rotation air outlet.
In this scheme, be equipped with the snail tongue in corotation air outlet department, the effect of snail tongue prevents that wind from following the impeller corotation, play the guide wind and get into first wind channel, the effect of increase flow, and to this snail tongue that carries out the air current direction in corotation air outlet department, when the impeller reversal, the snail tongue of corotation air outlet department can play the effect of guide air current along the spiral case tangential cycle on the contrary, can play the effect of restraining the air current from positive air outlet exhaust when the impeller reversal like this, further make the interior air current of spiral case mainly discharge along the reversal air outlet that is suitable for supplying the impeller reversal air-out when the impeller reversal, it is little to air exhaust the resistance, it is efficient to air exhaust, and the noise of airing exhaust is low.
In the technical scheme, the reverse air outlet is positioned at the back side of the volute tongue; and/or the reverse air outlet is positioned on the volute casing and adjacent to the volute tongue.
In this scheme, the reverse rotation air outlet is in the dorsal part of snail tongue, like this, when the impeller reversal, can utilize snail tongue formation in snail tongue department with the effect that the wind pushed down, make spiral case drainage wind-guiding effect better, the spiral case is followed the corotation air outlet and is aired exhaust when reducing the impeller reversal simultaneously for the interior air current of spiral case mainly along being suitable for the reversal air outlet discharge that supplies the impeller reversal air-out when the impeller reversal, the resistance of airing exhaust is little, it is efficient to air exhaust, and the noise of airing exhaust is low.
The reverse air outlet at the back side of the volute tongue is adjacent to the volute tongue in position on the volute casing, so that the air flow passing through the volute tongue in the volute casing is less when the impeller reversely rotates, the flow choking effect of the volute tongue on the air flow is correspondingly reduced, the kinetic energy loss of the air flow is reduced, and the noise of the air flow in the volute casing is reduced.
In any of the above technical solutions, the inner wall profile of the volute is spiral, wherein when the impeller is located in the volute, the radial distance between the impeller and the inner wall of the volute gradually increases along the inner wall profile of the volute from the reverse rotation air outlet to the forward rotation air outlet.
It is worth mentioning that the volute is used for accommodating the impeller, wherein the inner wall profile of the volute is an intersection line formed by the intersection of the inner surface of the volute and a middle section perpendicular to the axis of the impeller.
In the scheme, the inner wall molded line of the volute is spiral, the inner wall molded line along the volute is designed to be from the reverse air outlet to the forward air outlet, the radial distance between the volute and the inner impeller is gradually increased, and the wind pressure can be improved when the impeller rotates forwards.
In any one of the above technical solutions, a portion of the first air duct for connecting the forward rotation air outlet is configured as follows: along the air outlet direction of the positive rotation air outlet, the flow area of the positive rotation air outlet is gradually increased; and/or the second air duct is configured to: and along the air outlet direction of the reverse air outlet, the flow area of the reverse air outlet is gradually increased.
In this scheme, set up the position that first wind channel is used for connecting corotation air outlet and be constructed as: along the air outlet direction of the positive rotation air outlet, the structure that the flow area is gradually increased can realize the diffusion of the air flow discharged from the positive rotation air outlet of the volute and improve the air pressure of the discharged air; providing a second air duct configured to: along the air-out direction of reversal air outlet, the structure of its flow area crescent can realize expanding the pressure to the reversal air outlet combustion air current from the spiral case, promotes the wind pressure of airing exhaust.
Embodiments of a second aspect of the invention provide a fan assembly comprising: the air duct in any one of the above technical schemes; the impeller is arranged in the volute of the air duct and used for driving air flow to be discharged along the forward rotation air outlet of the volute in the forward rotation process and driving air flow to be discharged along the reverse rotation air outlet of the volute in the reverse rotation process.
The fan assembly according to the embodiment of the present invention has all the above beneficial effects by providing the air duct according to any one of the above technical solutions, and details are not repeated herein.
An embodiment of a third aspect of the present invention provides a clothes dryer, including the fan assembly in any one of the above technical solutions.
The clothes dryer of the embodiment of the invention has all the beneficial effects by arranging the fan assembly in any one of the technical schemes, and the detailed description is omitted.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a configuration of an impeller and a rear duct system of a conventional clothes dryer;
FIG. 2 is a schematic view of the impeller and rear duct system of a conventional clothes dryer in another state;
FIG. 3 is a schematic structural view of a fan assembly according to one embodiment of the present invention;
FIG. 4 is a schematic view of the fan assembly shown in FIG. 3 in another state;
FIG. 5 is a schematic view illustrating a structure of a dryer according to an embodiment of the present invention;
FIG. 6 is a schematic structural view of an impeller and a rear duct system of another prior art dryer;
fig. 7 is a schematic view of the structure of the member shown in fig. 6 in another state.
Wherein, the correspondence between the reference numbers and the component names in fig. 1, 2, 6, 7 is:
110 volute, 120 volute tongue, 130 airflow channel, 140 impeller, 150 flap.
Wherein, the correspondence between the reference numbers and the part names in fig. 3 to 5 is:
200 air ducts, 210 volutes, 211 forward rotation air outlets, 212 reverse rotation air outlets, 220 air flow passages, 221 first air ducts, 222 second air ducts, 230 air door components, 231 hinge structures, 232 turning plates, 240 volute tongues, 300 impellers, 400 clothes dryers, 410 condensers, 420 evaporators and 430 inner cylinders.
Detailed Description
In order that the above objects, features and advantages of the present invention can be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
The air duct, the fan assembly and the dryer according to some embodiments of the present invention will be described with reference to fig. 3 to 5.
As shown in fig. 3 and 4, an embodiment of the first aspect of the present invention provides an air duct 200, including: a volute 210, an airflow passage 220, and a damper member 230.
Specifically, the scroll 210 is provided with a forward rotation air outlet 211 and a reverse rotation air outlet 212; the airflow channel 220 includes a first air channel 221 and a second air channel 222, the first air channel 221 is communicated with the forward rotation air outlet 211, the second air channel 222 is connected with the first air channel 221 and the reverse rotation air outlet 212, and the reverse rotation air outlet 212 is communicated with the first air channel 221 when the second air channel 222 is in an open state; a damper member 230 is provided on the air flow passage 220 for controlling the opening and closing of the second air path 222.
In the air duct 200 provided in the above embodiment of the present invention, the air flow passage 220 includes the first air duct 221 and the second air duct 222, when the impeller 300 rotates forward in the volute 210, the air flow is discharged from the forward rotation air outlet 211 and enters the first air duct 221 for external discharge, when the impeller 300 rotates backward in the volute 210, the air door component 230 is controlled to open the second air duct 222, and the air flow is discharged from the reverse rotation air outlet 212 and enters the first air duct 221 for external discharge along the second air duct 222, so that the air volume under the condition of reverse driving of the impeller 300 can be increased while the air volume under the condition of forward driving of the impeller 300 is not reduced, and the air volume requirement under the condition of reverse driving of the impeller 300 is met.
In addition, in this scheme, the damper component 230 is disposed on the airflow channel 220 for controlling the second air duct 222 to open and close, so as to correspondingly control the first air duct 221 and the reverse air outlet 212 to be connected or disconnected, compared with the structure that the turning plate 150 is disposed on the scroll casing 110 as shown in fig. 6 and 7, when the structure controls the reverse air outlet 212 and the first air duct 221 to be disconnected, a slit structure is not generated on the surface of the scroll casing 210, so that the problem of air leakage when the reverse air outlet 212 and the first air duct 221 are disconnected is not easy to occur, and airflow noise generated in the scroll casing 210 due to the slit structure is not generated, generally, the effects of large air volume and low noise when the product is rotated forward and backward are achieved.
In one embodiment of the present invention, the damper component 230 includes: a hinge structure 231 (specifically, a hinge, a pivot, etc.) and a flap 232, specifically, the flap 232 is connected to the airflow channel 220 through the hinge structure 231 and can rotate around the hinge structure 231 between a position closing the second air duct 222 and a position opening the second air duct 222.
Certainly, the scheme is not limited to this, and the air door component can also be designed as a ramp door according to the requirement, so that the ramp door can move along the radial direction of the second air duct to control the opening and closing of the second air duct.
Preferably, the air door component 230 is disposed at a position, adjacent to the first air duct 221, of the second air duct 222, so that the air door component 230 may be far away from the volute 210 as far as possible, and compared with a structure in which a local part of the volute is directly set as a turning plate to turn over the turning plate on the volute so as to open the local part of the volute locally for reverse air outlet by controlling the turning plate on the volute, when the structure of the present scheme controls the disconnection between the reverse air outlet 212 and the first air duct 221, a slit structure is not generated on the volute 210, so that the problem of easy air leakage at the slit when the disconnection between the reverse air outlet 212 and the first air duct 221 occurs does not occur, and airflow noise generated in the volute 210 due to the slit structure is also avoided, thereby.
More specifically, as shown in fig. 3 and 4, the flap 232 is a structure with one end fixed by a hinge structure 231 and the other end being a movable end, and when the flap 232 is in a position to close the second air duct 222, the flap 232 blocks one end of the second air duct 222 adjacent to the first air duct 221, and the movable end of the flap 232 abuts against the first air duct 221 to achieve sealing.
Preferably, as shown in fig. 4, when the flap 232 is located at the position for opening the second air duct 222, at least a portion of the flap 232 extends into the first air duct 221, so that the air flow is driven by the impeller 300 to be discharged from the forward rotation air outlet 211 and flows along the first air duct 221, and then the air flow can act on the portion of the flap 232 located in the first air duct 221, so as to drive the flap 232 by air pressure to turn the flap 232 from the position for opening the second air duct 222 to the position for closing the second air duct 222 along the downwind direction, thereby achieving the purpose of automatically controlling the second air duct 222 to be closed when the impeller 300 is rotated forward, reducing the air discharge amount from the second air duct 222 when the impeller 300 is rotated forward, and enabling the air flow in the volute 210 when the impeller 300 is rotated forward to be mainly discharged along the forward rotation air outlet 211 suitable for supplying air for the impeller 300 to rotate forward, and having small air discharge resistance, high air discharge efficiency and low air discharge, meanwhile, the opening and closing states of the turning plate 232 do not need to be detected, judged and controlled before the impeller 300 works, the product control flow is simplified, and the operation reliability is higher.
Preferably, as shown in fig. 3, when the air flow is driven by the impeller 300 to rotate reversely and discharged from the reverse air outlet 212 and flows along the second air duct 222, the turning plate 232 can be driven to turn from the position for closing the second air duct 222 to the position for opening the second air duct 222 along the downwind direction, for example, the hinge force of the hinge structure 231 is controlled to be suitable for the wind pressure when the impeller 300 rotates reversely, this can realize that the second air duct 222 is automatically controlled to open by the air flow when the impeller 300 rotates reversely, so that the air flow in the volute 210 is mainly discharged along the reverse air outlet 212 suitable for the reverse air outlet of the impeller 300 when the impeller 300 reversely rotates, the air exhaust resistance is small, the air exhaust efficiency is high, the air exhaust noise is low, and the structure does not need to electrically control or manually control the opening of the turnover plate 232, the structure is more simplified, meanwhile, the opening and closing states of the turning plate 232 do not need to be detected, judged and controlled before the impeller 300 works, the product control flow is simplified, and the operation reliability is higher.
In an embodiment of the present invention, the forward rotation air outlet 211 is provided with a volute tongue 240, the volute tongue 240 functions to prevent wind from rotating forward along with the impeller 300, and to guide the wind into the first air duct 221 and increase the flow rate, and for the volute tongue 240 that guides the airflow at the forward rotation air outlet 211, when the impeller 300 rotates backward, the volute tongue 240 at the forward rotation air outlet 211 can instead function to guide the airflow to circulate along the tangential direction of the volute 210, so that the exhaust of the airflow from the forward air outlet can be inhibited when the impeller 300 rotates backward, further, when the impeller 300 rotates backward, the airflow in the volute 210 is mainly exhausted along the backward rotation air outlet 212 suitable for the impeller 300 to exhaust air in the backward rotation direction, and the exhaust resistance is small, the exhaust efficiency is high, and the exhaust noise is low.
In an embodiment of the present invention, as shown in fig. 3 and 4, the reverse rotation air outlet 212 is located at the back side of the volute tongue 240, and preferably, the reverse rotation air outlet 212 is located at a position on the volute casing 210 adjacent to the volute tongue 240, such that when the impeller 300 rotates reversely, the volute casing 210 can be better guided to flow air and wind, and the air flow in the volute casing 210 is mainly discharged along the reverse rotation air outlet 212 adapted to supply reverse rotation air to the impeller 300 when the impeller 300 rotates reversely, so that the air flow in the volute casing 210 when the impeller 300 rotates reversely is reduced, the air discharge resistance is low, the air discharge efficiency is high, the air discharge noise is low, and by arranging the reverse rotation air outlet 212 at the back side of the volute tongue 240 adjacent to the volute tongue 240, the air flow passing through the volute tongue 240 in the volute casing 210 when the impeller 300 rotates reversely can be reduced, thereby correspondingly reducing the flow blocking effect on the air flow at the volute tongue 240, the loss of kinetic energy of the airflow is reduced, and the noise of the airflow in the volute 210 is reduced.
In an embodiment of the present invention, as shown in fig. 3 and 4, the inner wall profile of the volute 210 is spiral, so that the volute 210 is a spiral volute or a spiral volute similar to the spiral volute, the volute 210 is provided with an impeller assembling portion for assembling the impeller 300, and when the impeller 300 is located in the volute 210 and assembled in the impeller assembling portion, the radial distance between the impeller 300 and the inner wall of the volute 210 changes in a gradually increasing trend along the inner wall profile of the volute 210 from the reverse air outlet 212 to the forward air outlet 211 (i.e., in a direction indicated by a dot-dash arrow shown in fig. 3), which is beneficial to increasing the air pressure when the impeller 300 rotates forward.
In one embodiment of the present invention, as shown in fig. 3 and 4, the portion of the first air duct 221 for connecting the forward rotation air outlet 211 is configured as follows: along the air outlet direction of the positive rotation air outlet 211, the structure that the flow area is gradually increased can realize the air flow diffusion from the positive rotation air outlet 211 of the volute 210, and improve the air pressure of the air exhaust.
In one embodiment of the present invention, as shown in fig. 3 and 4, the second air duct 222 is configured to: along the air-out direction of the reversal air outlet 212, the structure that the flow area thereof is gradually increased can realize the air current diffusion from the reversal air outlet 212 of the volute 210, and improve the air pressure of the air exhaust.
As shown in fig. 3 and 4, the fan assembly provided by the embodiment of the second aspect of the present invention includes an impeller 300 and the air duct 200 described in any of the above embodiments, the impeller 300 is disposed in the volute 210 of the air duct 200, and the impeller 300 is configured to drive an air flow to be discharged along the forward rotation air outlet 211 of the volute 210 in the forward rotation and to be discharged along the reverse rotation air outlet 212 of the volute 210 in the reverse rotation.
The fan assembly according to the above embodiment of the present invention has all the above beneficial effects by providing the air duct 200 according to any of the above embodiments, and details are not repeated herein.
In an embodiment of the present invention, as shown in fig. 3 and 4, the fan assembly includes an air duct 200 and an impeller 300, the air duct 200 includes a spiral casing 210 and an air flow passage 220, the impeller 300 is located in the spiral casing 210, the spiral casing 210 is a spiral casing with a spiral inner wall profile or a similar spiral casing, the spiral casing 210 has a forward rotation air outlet 211 and a reverse rotation air outlet 212, the forward rotation air outlet 211 is communicated with a first air duct 221 of the air flow passage 220, a spiral tongue 240 is disposed at the forward rotation air outlet 211, the reverse rotation air outlet 212 is connected with the first air duct 221 of the air flow passage 220 through a second air duct 222 of the air flow passage 220, a turning plate 232 is disposed at the second air duct 222, and the turning plate 232 can turn up and down to.
Compared with a structure that a turning plate 232 is arranged at the reverse air outlet 212 of the volute 210 and used for controlling the opening and closing of the reverse air outlet 212, the turning plate 232 in the structure is far away from the volute 210, so that when the impeller 300 rotates forwards, the turning plate 232 cannot be turned upwards to expose a small gap under the influence of air flow, the problem of noise caused by the slit on the volute 210 can be avoided, noise reduction of the product volute 210 is realized, the turning plate 232 is connected to the back surface of the volute tongue 240 through a hinge structure 231, and under the condition of not being influenced by external force except gravity, the turning plate 232 can only have two shapes, namely a state of turning upwards to open the second air channel 222 (shown in fig. 4) or a state of turning downwards to close the second air channel 222 (shown in fig. 3); before the impeller 300 is not rotated, the initial position of the flap 232 is unknown, and may be turned up open or down closed.
When the motor drives the impeller 300 to rotate counterclockwise as shown by the dotted arrow in fig. 4, that is, when the impeller 300 rotates reversely, the airflow moves in the direction shown by the dotted arrow in fig. 4. As for the movement process of the flap 232: if the flap 232 is in the flip-up open state (i.e., the position of the flap 232 as shown in fig. 4) before the impeller 300 rotates reversely, the flap 232 does not need to be moved when the impeller 300 rotates reversely, and the airflow is not affected; if the turning plate 232 is in the downward-turning closed state before the impeller 300 rotates reversely, the turning plate 232 can be blown open upward to the upward-turning state by driving the airflow to flow along the second air duct 222 when the impeller 300 rotates reversely, so as to control the second air duct 222 to be opened, and the airflow can flow upward through the second air duct 222 to enter the first air duct 221 for being discharged outward.
When the motor carries the impeller 300 to rotate clockwise as shown by the dashed arrow in fig. 3, i.e., when the impeller 300 rotates forward, the airflow moves in the direction shown by the dashed arrow in fig. 3. As for the movement process of the flap 232: if the flap 232 is in the downward-turning closed state (i.e., the position of the flap 232 shown in fig. 3) before the impeller 300 rotates forward, the flap 232 does not need to be moved when the impeller 300 rotates forward, and the airflow is not affected; if the flap 232 is in the flip-up open state before the impeller 300 rotates forward, when the impeller 300 rotates forward and drives the airflow to be discharged from the forward rotation air outlet 211 and flow along the first air duct 221, the airflow flowing along the first air duct 221 can drive the flap 232 to flip from the flip-up position to the flip-down position to control the second air duct 222 to be closed.
It can be seen that, before the operating condition of the forward rotation or reverse rotation of the impeller 300 is performed, the state of the flap 232 does not need to be detected in advance or the action of controlling the flap 232 in advance, and when the impeller 300 is in the forward rotation, the flap 232 is automatically controlled to move from the position of opening the second air duct 222 to the position of closing the second air duct 222 by using the airflow driven by the forward rotation of the impeller 300, and when the impeller 300 is in the reverse rotation, the flap 232 is automatically controlled to move from the position of closing the second air duct 222 to the position of opening the second air duct 222 by using the airflow driven by the reverse rotation of the impeller 300.
In addition, according to the detection, compared with the fan assembly in the present design, the air duct and impeller structure (such as the structure illustrated in fig. 1 and 2) of the conventional fan assembly has the following flow data under different working conditions:
| impeller speed and direction | Clockwise 2700rpm | Counterclockwise 2700rpm | Counter clockwise 3500rpm |
| Traditional fan assembly | 202m3/h | 30.5m3/h | 44.1m3/h |
| The fan assembly | 201m3/h | 54.1m3/h | 77.2m3/h |
It can be seen from the foregoing table that, compared with the conventional fan assembly, in the case that the air volume of the impeller 300 in the forward rotation is not reduced, at the rotation speed of 2700rpm, the air volume of the impeller 300 in the reverse rotation is increased by 77.4% compared with the conventional fan assembly, and at the rotation speed of 3500rpm, the air volume of the impeller 300 in the reverse rotation is increased by 75% compared with the conventional fan assembly, so that the requirement for the reverse rotation air volume can be met, and the forward rotation operation energy efficiency is not reduced.
In addition, as shown in fig. 3 and 4, by providing the turning plate 232 at the second air duct 222, compared with a structure (for example, the structure illustrated in fig. 6 and 7) in which the volute is partially set as the turning plate to open the volute locally for reverse air outlet by controlling the turning plate on the volute to turn over, the dryer noise test method described in IEC60704-2-6 standard is adopted to perform no-load air noise test on the fan assemblies of the two turning plate setting structures in the same dryer, and the test results are as follows:
the test result shows that compared with the fan component with the volute locally and directly used as the turning plate, the fan component can reduce the no-load noise of the whole machine by about 2db and has better silence.
As shown in fig. 5, an embodiment of the third aspect of the present invention provides a clothes dryer 400 including a fan assembly as described in any of the above embodiments.
The dryer 400 according to the above embodiment of the present invention has all the above advantages by providing the blower assembly according to any of the above embodiments, and the description thereof is omitted.
More specifically, as shown in fig. 5, the clothes dryer 400 may be a heat pump clothes dryer, and specifically includes a fan assembly, an inner drum 430, an evaporator 420, a condenser 410, and the like, where the fan assembly includes an air duct 200 and an impeller 300, and the impeller 300 is located in the air duct 200, where the impeller 300 is driven by a motor to rotate, so as to accelerate the air flow near the impeller 300, so as to suck the air into the volute 210 of the air duct 200, and drive the wind in the volute 210 to move upwards to be discharged into the inner drum 430 through a first air duct 221, and the air flow can take away moisture in clothes in the inner drum 430, and then, through the evaporator 420 and the condenser 410, so as to condense water vapor in the air into water drops, heat the air, and then, return the air flow to the impeller 300 again to complete circulation, thereby achieving the purpose of.
In the present invention, the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "coupled" may be direct or indirect through an intermediary. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. An air duct (200), comprising:
the volute (210) is provided with a forward rotation air outlet (211) and a reverse rotation air outlet (212);
the airflow channel (220) comprises a first air duct (221) and a second air duct (222), the first air duct (221) is communicated with the forward rotation air outlet (211), the second air duct (222) is connected with the first air duct (221) and the reverse rotation air outlet (212), and the reverse rotation air outlet (212) is communicated with the first air duct (221) when the second air duct (222) is in an open state;
a damper component (230) arranged on the airflow passage (220) and used for controlling the opening and closing of the second air duct (222);
when the impeller (300) is positioned in the volute (210), the radial distance between the impeller (300) and the inner wall of the volute (210) is in a gradually increasing trend along the direction from the reverse air outlet (212) to the forward air outlet (211) along the inner wall profile of the volute (210).
2. The air duct (200) of claim 1, wherein the damper component (230) comprises:
a hinge structure (231);
a flap (232) connected to the air flow channel (220) by the hinge structure (231) and rotatable about the hinge structure (231) between a position closing the second air duct (222) and a position opening the second air duct (222).
3. The air duct (200) of claim 2,
when the turning plate (232) is located at the position for opening the second air duct (222), at least part of the turning plate extends into the first air duct (221), wherein when the air flow is driven by the impeller (300) to be discharged from the forward rotation air outlet (211) and flows along the first air duct (221), the turning plate (232) can be driven to turn from the position for opening the second air duct (222) to the position for closing the second air duct (222) along the downwind direction.
4. The air duct (200) of claim 2,
when the airflow is driven by the impeller (300) to be reversely rotated, discharged from the reverse air outlet (212) and flows along the second air duct (222), the turning plate (232) can be driven to turn from the position for closing the second air duct (222) to the position for opening the second air duct (222) along the downwind direction.
5. The air duct (200) according to any one of claims 1 to 4,
the damper member (230) is provided at a position of the second air duct (222) adjacent to the first air duct (221).
6. The air duct (200) according to any one of claims 1 to 4,
a volute tongue (240) is arranged at the positive rotation air outlet (211).
7. The air duct (200) of claim 6,
the reverse air outlet (212) is positioned at the back side of the volute tongue (240); and/or
The inverted air outlet (212) is located on the volute (210) adjacent to the volute tongue (240).
8. The air duct (200) according to any one of claims 1 to 4,
the inner wall profile of the volute (210) is spiral.
9. The air duct (200) according to any one of claims 1 to 4,
the portion of the first air duct (221) for connecting the forward rotation air outlet (211) is configured to: along the air outlet direction of the positive rotation air outlet (211), the flow area of the positive rotation air outlet is gradually increased; and/or
The second air duct (222) is configured to: and the flow area of the air outlet is gradually increased along the air outlet direction of the reverse air outlet (212).
10. A fan assembly, comprising:
the air duct (200) of any one of claims 1 to 9;
the impeller (300) is arranged in a volute (210) of the air duct (200), and the impeller (300) is used for driving air flow to be discharged along a forward rotation air outlet (211) of the volute (210) in the forward rotation process and driving air flow to be discharged along a reverse rotation air outlet (212) of the volute (210) in the reverse rotation process.
11. A clothes dryer (400) characterized by comprising a fan assembly as claimed in claim 10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875431.0A CN110792636B (en) | 2018-08-03 | 2018-08-03 | Air duct, fan assembly and clothes dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810875431.0A CN110792636B (en) | 2018-08-03 | 2018-08-03 | Air duct, fan assembly and clothes dryer |
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| Publication Number | Publication Date |
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| CN110792636A CN110792636A (en) | 2020-02-14 |
| CN110792636B true CN110792636B (en) | 2021-01-29 |
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| CN201810875431.0A Active CN110792636B (en) | 2018-08-03 | 2018-08-03 | Air duct, fan assembly and clothes dryer |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113106715B (en) * | 2021-04-16 | 2023-03-14 | 江苏友奥电器有限公司 | Air duct rear cover structure and heat pump dryer |
| CN218235589U (en) * | 2021-11-05 | 2023-01-06 | 无锡小天鹅电器有限公司 | Air ducting and dry clothing equipment |
| WO2024109010A1 (en) * | 2022-11-25 | 2024-05-30 | 无锡小天鹅电器有限公司 | Rear cover assembly and clothes drying apparatus |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09184498A (en) * | 1995-12-28 | 1997-07-15 | Tominaga Jushi Kogyosho:Kk | Centrifugal pump |
| JP2003003995A (en) * | 2001-06-22 | 2003-01-08 | Toto Ltd | Pump and dishwasher provided therewith |
| CN105275882B (en) * | 2015-10-21 | 2018-11-30 | 珠海格力电器股份有限公司 | Fan, air conditioner and control method of air conditioner |
| CN107869033B (en) * | 2016-09-26 | 2020-10-02 | 青岛胶南海尔洗衣机有限公司 | Forward and reverse rotating fan for clothes dryer and clothes dryer |
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