CN210343751U - Centrifugal fan and clothes dryer - Google Patents
Centrifugal fan and clothes dryer Download PDFInfo
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- CN210343751U CN210343751U CN201920758723.6U CN201920758723U CN210343751U CN 210343751 U CN210343751 U CN 210343751U CN 201920758723 U CN201920758723 U CN 201920758723U CN 210343751 U CN210343751 U CN 210343751U
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Abstract
The utility model belongs to the technical field of the fan, specifically provide a centrifugal fan and dryer, centrifugal fan includes the casing and sets up impeller and the snail tongue in the casing, be provided with air intake and air outlet on the casing, the snail tongue includes range upon range of and the first snail tongue and the second snail tongue of dislocation set each other, first snail tongue sets up to blow the air cutting that comes with the impeller and guide the air to the air outlet when impeller forward rotation, the second snail tongue sets up to blow the air cutting that comes with the impeller and guide the air to the air outlet when impeller antiport. Through set up first snail tongue and second snail tongue in centrifugal fan's casing, when the impeller forward rotation, first snail tongue can cut the air that the impeller was blown and lead to the air outlet with the air, and when the impeller reverse rotation, the air that the second snail tongue can blow the impeller is cut and lead to the air outlet with the air for centrifugal fan can all blow off a large amount of air when the impeller forward with the reverse rotation through such setting.
Description
Technical Field
The utility model belongs to the technical field of the fan, specifically provide a centrifugal fan and dryer.
Background
The centrifugal fan accelerates gas by using an impeller rotating at a high speed according to the principle that kinetic energy is converted into potential energy, and then decelerates and changes the flow direction so as to convert the kinetic energy into the potential energy. The centrifugal fan comprises a motor, a shell and an impeller arranged in the shell, the motor can drive the impeller to rotate at a high speed so as to accelerate air, and a volute tongue is arranged at an air outlet of the shell and can cut air flow driven by the impeller so as to discharge the air flow from the air outlet.
In some occasions, it is necessary for the centrifugal fan to be capable of rotating forward and backward, for example, a clothes dryer, in order to reduce cost, an existing clothes dryer usually adopts a motor to drive the drying drum and the impeller of the centrifugal fan to rotate simultaneously, in order to solve the problem that clothes are wound in the drying drum, the drying drum needs to rotate forward and backward in the working process of the clothes dryer, when the impeller rotates along with the forward direction (the design direction of the centrifugal fan) of the drying drum, the volute tongue can cut the airflow driven by the impeller, so that the airflow is discharged from the air outlet, however, when the impeller rotates along with the reverse direction (opposite to the design direction) of the drying drum, the volute tongue cannot cut the airflow driven by the impeller, so that the air volume discharged from the air outlet is reduced sharply, thereby affecting the drying effect of the clothes.
Therefore, there is a need in the art for a new centrifugal fan and dryer that solves the above problems.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the prior art, namely to solve the problem that the volute tongue of the existing centrifugal fan can not cut the air flow driven by the impeller when the rotation direction of the impeller is opposite to the design direction, thereby leading to the problem that the air output of the centrifugal fan is sharply reduced, the utility model provides a centrifugal fan, the centrifugal fan comprises a shell, an impeller and a volute tongue which are arranged in the shell, an air inlet and an air outlet are arranged on the shell, the volute tongue comprises a first volute tongue and a second volute tongue which are stacked and arranged in a staggered mode, the impeller is arranged to be capable of sucking air into the shell from the air inlet when rotating, the first volute tongue is arranged to cut air blown by the impeller and guide the air to the air outlet when the impeller rotates in the forward direction, the second volute tongue is arranged to cut air blown from the impeller and guide the air to the air outlet when the impeller rotates in the reverse direction.
In a preferred technical solution of the above centrifugal fan, the impeller is a double-layer impeller, the double-layer impeller includes a first layer of impeller portion disposed corresponding to the first volute tongue and a second layer of impeller portion disposed corresponding to the second volute tongue, and an axis of the first layer of impeller portion coincides with an axis of the second layer of impeller portion.
In a preferred technical solution of the above centrifugal fan, the first-layer impeller portion includes a plurality of first blades arranged in an annular shape, the plurality of first blades are jointly arranged to guide the air entering the casing from the air inlet to the first volute tongue when the first-layer impeller portion rotates in the forward direction, the second-layer impeller portion includes a plurality of second blades arranged in an annular shape, and the plurality of second blades are jointly arranged to guide the air entering the casing from the air inlet to the second volute tongue when the second-layer impeller portion rotates in the reverse direction.
In an optimal technical scheme of the centrifugal fan, the first blade and the second blade are both arc-shaped blades, and the inclination direction of the first blade is different from that of the second blade.
In an optimal technical scheme of the centrifugal fan, the first blade and the second blade are both straight blades, and the inclination direction of the first blade is the same as or different from that of the second blade.
In a preferred technical solution of the above centrifugal fan, the impeller is a single-layer impeller, the single-layer impeller includes an impeller portion disposed corresponding to the first volute tongue and the second volute tongue, the impeller portion includes a plurality of annularly disposed blades, and the plurality of blades are jointly disposed to guide air entering the housing from the air inlet to the first volute tongue and the second volute tongue when the impeller portion rotates in a forward direction or a reverse direction.
In the above centrifugal fan, preferably, the plurality of blades are all straight blades and are arranged along the radial direction of the single-layer impeller.
In the above preferred technical solution of the centrifugal fan, the number of the air inlets is one, and the air inlets are disposed at one side of the housing.
In a preferred embodiment of the above centrifugal fan, the impeller is provided with an air guide structure, and the air guide structure is configured to guide air entering the casing.
In the preferable technical scheme of the centrifugal fan, the air guide structure is an air guide frustum, and the conical end of the air guide frustum is arranged close to the air inlet.
In the above preferred technical solution of the centrifugal fan, the number of the air inlets is two, the air inlets include a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively disposed at two sides of the housing.
In a preferred embodiment of the above centrifugal fan, the impeller is provided with an air guide structure, and the air guide structure is configured to guide air entering the casing.
In the preferable technical scheme of the centrifugal fan, the air guide structure comprises a first air guide frustum and a second air guide frustum which are connected, the conical end of the first air guide frustum is close to the first air inlet, and the conical end of the second air guide frustum is close to the second air inlet.
In another aspect, the present invention also provides a clothes dryer, which includes the above centrifugal fan.
As can be understood by those skilled in the art, in the preferred technical solution of the present invention, by providing two volute tongue structures in the casing of the centrifugal fan: first snail tongue and second snail tongue, and make first snail tongue and second snail tongue be range upon range of dislocation set, for example, set up first snail tongue on the left side board of casing and be close to the roof setting of casing, the setting of second snail tongue is on the right side board of casing and be close to the bottom plate setting of casing, when impeller forward rotation, first snail tongue can cut the air that the upper half of impeller was blown and guide the air to the air outlet, when impeller antiport, the air that the lower half of impeller was blown can be cut and guide the air to the air outlet with the second snail tongue, through such setting, make centrifugal fan all blow out a large amount of air when impeller forward and antiport.
Further, the impeller is a double-layer impeller, the double-layer impeller comprises a first layer of impeller part and a second layer of impeller part, the first layer of impeller part corresponds to the first volute tongue, and the second layer of impeller part corresponds to the second volute tongue. Through the arrangement, the specific form of the blades of the first layer of impeller part and the specific form of the blades of the second layer of impeller part can be flexibly arranged according to actual requirements in actual application, and the design is more flexible and diversified, so that the centrifugal fan can meet more different requirements.
Further, when first layer impeller portion forward rotates, first blade can lead to first snail tongue with the air that the air intake got into the casing to can improve centrifugal fan's air output, and in the same way, when second layer impeller portion reverse rotation, the second blade can lead to the second snail tongue with the air that the air intake got into the casing, thereby can improve centrifugal fan's air output, during impeller forward and reverse rotation promptly, the homoenergetic improves centrifugal fan's air output.
Further, the impeller is a single-layer impeller, the single-layer impeller comprises an impeller portion which corresponds to the first volute tongue and the second volute tongue, and the impeller portion comprises a plurality of blades which are annularly arranged. Through setting up the impeller into the individual layer impeller, can reduce the design degree of difficulty, the processing of being convenient for to reduce cost.
Further, the plurality of blades are all straight blades and are arranged along the radial direction of the single-layer impeller. Through the arrangement, the centrifugal fan can blow out the same amount of wind when the impeller rotates forwards and backwards.
Furthermore, an air guide structure is arranged in the impeller. The air entering the shell is guided through the air guide structure, and the air guide structure is favorable for the flow of the air.
Furthermore, the air inlet comprises a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively arranged on two sides of the shell. Through setting up two air intakes, make the air get into simultaneously from the both sides of casing to can improve centrifugal fan's air output.
Furthermore, under the condition that the number of the air inlets is two, the air guide structure comprises a first air guide frustum and a second air guide frustum which are connected, wherein the conical end of the first air guide frustum is arranged close to the first air inlet, and the conical end of the second air guide frustum is arranged close to the second air inlet. Specifically, in the structure of the double-layer impeller, the first air guide frustum guides the air entering from the first air inlet to the first impeller part, and the second air guide frustum guides the air entering from the second air inlet to the second impeller part, so that the air can be prevented from colliding in the impeller; in the structure of the single-layer impeller, the first air guide frustum guides air entering from the first air inlet to the upper half part of the impeller part, and the second air guide frustum guides air entering from the second air inlet to the lower half part of the impeller part, so that the air can be prevented from colliding in the impeller.
Furthermore, the utility model discloses owing to adopted above-mentioned centrifugal fan, the dryer that further provides on above-mentioned technical scheme's basis has further possessed the technological effect that above-mentioned centrifugal fan possessed, compares in the dryer before improving, the utility model discloses a dryer can all provide sufficient amount of wind when a stoving section of thick bamboo forward and reverse rotation to can improve the stoving effect to the clothing.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
fig. 1 is a first schematic structural diagram of a first embodiment of a centrifugal fan according to the present invention;
fig. 2 is a schematic structural diagram ii of a first embodiment of the centrifugal fan of the present invention;
fig. 3 is a first schematic structural diagram of an impeller of a first embodiment of a centrifugal fan according to the present invention;
fig. 4 is a schematic structural diagram three of a first embodiment of the centrifugal fan of the present invention;
fig. 5 is a schematic structural view of an impeller of a first embodiment of a centrifugal fan according to the present invention;
fig. 6 is a schematic structural view of a casing of a second embodiment of the centrifugal fan according to the present invention;
fig. 7 is a first schematic structural view of a second embodiment of the centrifugal fan of the present invention;
fig. 8 is a second schematic structural view of a second embodiment of the centrifugal fan of the present invention;
fig. 9 is a third schematic structural view of a second embodiment of the centrifugal fan of the present invention;
fig. 10 is a schematic structural view of an impeller of a second embodiment of a centrifugal fan according to the present invention;
FIG. 11 is a cross-sectional view of FIG. 10;
fig. 12 is a first schematic structural diagram of a third embodiment of the centrifugal fan of the present invention;
fig. 13 is a schematic structural view ii of a centrifugal fan according to a third embodiment of the present invention;
fig. 14 is a first schematic structural diagram of an impeller of a third embodiment of a centrifugal fan according to the present invention;
fig. 15 is a second schematic structural view of an impeller of a third embodiment of a centrifugal fan according to the present invention;
fig. 16 is a first schematic structural diagram of a fourth embodiment of the centrifugal fan according to the present invention;
fig. 17 is a second schematic structural view of a fourth embodiment of the centrifugal fan of the present invention;
fig. 18 is a schematic structural view of an impeller of a fourth embodiment of a centrifugal fan according to the present invention;
fig. 19 is a sectional view of fig. 18.
Detailed Description
First, it should be understood by those skilled in the art that the embodiments described below are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention.
It should be noted that in the description of the present invention, the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicating the directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "disposed," "connected," and "connected" are to be construed broadly and may include, for example, a fixed connection, a detachable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The volute tongue of the existing centrifugal fan pointed out based on the background technology can not cut the air flow driven by the impeller when the rotation direction of the impeller is opposite to the design direction, thereby causing the problem that the air output of the centrifugal fan is sharply reduced. The utility model provides a centrifugal fan and dryer aims at making centrifugal fan's worm tongue homoenergetic when impeller forward and antiport cut the impeller initiative air current, guarantees the demand to the amount of wind.
Specifically, the utility model discloses a centrifugal fan includes the casing and sets up impeller and the snail tongue in the casing, is provided with air intake and air outlet on the casing, and the snail tongue includes range upon range of and the first snail tongue and the second snail tongue that misplace the setting each other, and the impeller sets up to be able to inhale the casing with the air by the air intake when rotating, and first snail tongue sets up to the air cutting that can blow the impeller over and draw the air to the air outlet when the impeller forward rotation, and the second snail tongue sets up to the air cutting that can blow the impeller over and draw the air to the air outlet when the impeller antiport. That is, the utility model discloses set up two snail tongue structures in centrifugal fan's casing: first snail tongue and second snail tongue, and make first snail tongue and second snail tongue be range upon range of dislocation set, for example set up first snail tongue on the left side board of casing and be close to the roof setting of casing, the setting of second snail tongue is on the right side board of casing and be close to the bottom plate setting of casing, when impeller forward rotation, first snail tongue can be with the air cutting that the upper half of impeller was blown and with air guide to the air outlet, when impeller antiport, the air cutting that the lower half of impeller was blown and with air guide to the air outlet can be blown to the second snail tongue, through such setting, make centrifugal fan all blow out a large amount of air when impeller forward and antiport. The technical solution of the present invention will be described in detail with reference to the following embodiments.
Example one
The technical solution of the first embodiment of the present invention is explained below with reference to fig. 1 to 5, wherein, fig. 1 is the first structural schematic diagram of the first embodiment of the centrifugal fan of the present invention, fig. 2 is the second structural schematic diagram of the first embodiment of the centrifugal fan of the present invention, fig. 3 is the first structural schematic diagram of the impeller of the first embodiment of the centrifugal fan of the present invention, fig. 4 is the third structural schematic diagram of the first embodiment of the centrifugal fan of the present invention, and fig. 5 is the second structural schematic diagram of the impeller of the first embodiment of the centrifugal fan of the present invention.
As shown in fig. 1 and 2, the centrifugal fan of the present embodiment includes a casing 1, and an impeller 2 and a volute tongue 3 disposed in the casing 1, the casing 1 is provided with an air inlet 4 and an air outlet 5, the volute tongue 3 includes a first volute tongue 31 and a second volute tongue 32 which are stacked and staggered with each other, the impeller 2 is a double-layer impeller, the double-layer impeller includes a first-layer impeller portion 21 disposed corresponding to the first volute tongue 31 and a second-layer impeller portion 22 disposed corresponding to the second volute tongue 32, and an axis of the first-layer impeller portion 21 coincides with an axis of the second-layer impeller portion 22. The number of the air inlets 4 is one, and the air inlets 4 are disposed on the top plate 11 of the casing 1, and of course, the air inlets 4 may also be disposed on the bottom plate 12 of the casing 1, the first volute tongue 31 is disposed on the upper portion of the left side plate 13 of the casing 1, that is, disposed near the top plate 11, and the second volute tongue 32 is disposed on the lower portion of the right side plate 14 of the casing 1, that is, disposed near the bottom plate 12, and when the impeller 2 rotates in the forward direction (clockwise rotation in the drawing), the first volute tongue 31 can cut the air blown from the first impeller portion 21 and guide the air to the air outlet 5, and when the impeller 2 rotates in the reverse direction (counterclockwise rotation in the drawing), the second volute tongue 32 can cut the air blown from the second impeller portion 22 and guide the air to the air outlet 5.
Preferably, as shown in fig. 2 to 5, the first-stage impeller portion 21 includes a plurality of first blades 211 arranged in a ring shape, the plurality of first blades 211 are collectively arranged to guide the air entering the casing 1 from the air inlet 4 to the first volute tongue 31 when the first-stage impeller portion 21 rotates in a forward direction, the second-stage impeller portion 22 includes a plurality of second blades 221 arranged in a ring shape, and the plurality of second blades 221 are collectively arranged to guide the air entering the casing 1 from the air inlet 4 to the second volute tongue 32 when the second-stage impeller portion 22 rotates in a reverse direction. In a preferred case, as shown in fig. 2 and 3, the first blade 211 and the second blade 221 are both arc-shaped blades, when the first-stage impeller portion 21 rotates in a forward direction (clockwise rotation as viewed in the drawings), the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 because the first blade 211 tilts clockwise, and similarly, when the second-stage impeller portion 22 rotates in a reverse direction (counterclockwise rotation as viewed in the drawings), the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 because the second blade 221 tilts counterclockwise, and the tilting direction of the first blade 211 is different from the tilting direction of the second blade 221. In another preferred case, as shown in fig. 4 and 5, the first blade 211 and the second blade 221 are both straight blades, when the first-stage impeller portion 21 rotates in a forward direction (clockwise rotation as viewed in the drawings), the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 because the first blade 211 tilts clockwise, and similarly, when the second-stage impeller portion 22 rotates in a reverse direction (counterclockwise rotation as viewed in the drawings), the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 because the second blade 221 tilts counterclockwise, and the tilting direction of the first blade 211 is different from the tilting direction of the second blade 221. In another special preferred case, in which the first blade 211 and the second blade 221 are both straight blades and the first blade 211 and the second blade 221 are both disposed in the radial direction of the impeller 2, the inclination directions of the first blade 211 and the second blade 221 are the same. It should be noted that the above-mentioned cases are only preferred cases, and the first blade 211 and the second blade 221 can be configured in other shapes, for example, the first blade 211 and the second blade 221 can be configured as "V" shaped blades or "L" shaped blades, etc., and such flexible adjustment and change can be achieved without departing from the principle and scope of the present invention, which should be limited within the protection scope of the present invention.
Preferably, as shown in fig. 1 and 2, the impeller 2 is provided with an air guide structure 6, and the air guide structure 6 is provided to guide air entering the casing 1. The air guide structure 6 is an air guide frustum 6, a conical end 61 of the air guide frustum 6 is arranged close to the air inlet 4, and air flows to the first-layer impeller part 21 and the second-layer impeller part 22 under the guidance of the air guide frustum 6 after entering from the air inlet 4. Of course, air guide structure 6 can also set up to other air guide structure 6 such as triangular pyramid, and this kind of adjustment and the change to air guide structure 6's concrete structural style are not skew the utility model discloses a principle and scope all should be injectd within the protection scope.
Example two
The technical solution of the second embodiment of the present invention is explained below with reference to fig. 6 to 11, wherein fig. 6 is a schematic structural diagram of a casing of the second embodiment of the centrifugal fan, fig. 7 is a first schematic structural diagram of the second embodiment of the centrifugal fan, fig. 8 is a second schematic structural diagram of the second embodiment of the centrifugal fan, fig. 9 is a third schematic structural diagram of the second embodiment of the centrifugal fan, fig. 10 is a schematic structural diagram of an impeller of the second embodiment of the centrifugal fan, and fig. 11 is a cross-sectional view of fig. 10.
As shown in fig. 6 to 9, the centrifugal fan of the present embodiment includes a casing 1, and an impeller 2 and a volute tongue 3 disposed in the casing 1, the casing 1 is provided with an air inlet 4 and an air outlet 5, the volute tongue 3 includes a first volute tongue 31 and a second volute tongue 32 which are stacked and staggered with each other, the impeller 2 is a double-layer impeller, the double-layer impeller includes a first-layer impeller portion 21 disposed corresponding to the first volute tongue 31 and a second-layer impeller portion 22 disposed corresponding to the second volute tongue 32, and an axis of the first-layer impeller portion 21 coincides with an axis of the second-layer impeller portion 22. Wherein, the number of the air inlets 4 is two, the air inlets 4 comprise a first air inlet 41 and a second air inlet 42, the first air inlet 41 and the second air inlet 42 are respectively arranged at two sides of the housing 1, the first air inlet 41 can be arranged on the top plate 11 of the shell 1, the second air inlet 42 can be arranged on the bottom plate 12 of the shell 1, the first volute tongue 31 can be arranged on the upper part of the left side plate 13 of the shell 1, i.e., adjacent to the top plate 11, the second volute tongue 32 is arranged at the lower part of the right side plate 14 of the housing 1, i.e., disposed close to the bottom plate 12, when the impeller 2 rotates in the forward direction (clockwise rotation as viewed in the drawing), the first volute tongue 31 can cut the air blown from the first-layer impeller portion 21 and guide the air to the air outlet 5, when the impeller 2 rotates in the reverse direction (counterclockwise in the drawing), the second volute tongue 32 can cut the air blown from the second-tier impeller portion 22 and guide the air to the air outlet 5.
It should be noted that, in the case that two air inlets 4 are provided, an output shaft of a driving motor (not shown in the figure) for driving the impeller 2 to rotate may extend from the first air inlet 41 or the second air inlet 42 to be connected to the impeller 2, if the output shaft of the driving motor extends from the first air inlet 41, a gap needs to be formed between the driving motor and the first air inlet 41 to avoid influencing air entering the casing 1 from the first air inlet 41, and similarly, if the output shaft of the driving motor extends from the second air inlet 42, a gap needs to be formed between the driving motor and the second air inlet 42 to avoid influencing air entering the casing 1 from the second air inlet 42.
Preferably, as shown in fig. 7 to 9, similarly to the embodiment, in the present embodiment, the first-stage impeller portion 21 includes a plurality of first blades 211 arranged in a ring shape, the plurality of first blades 211 are collectively arranged to guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 when the first-stage impeller portion 21 rotates in the forward direction, the second-stage impeller portion 22 includes a plurality of second blades 221 arranged in a ring shape, and the plurality of second blades 221 are collectively arranged to guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 when the second-stage impeller portion 22 rotates in the reverse direction. In a preferred case, as shown in fig. 7, the first blade 211 and the second blade 221 are arc-shaped blades, when the first-stage impeller portion 21 rotates in a forward direction (clockwise rotation as viewed in the drawing), the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 because the first blade 211 tilts clockwise, and similarly, when the second-stage impeller portion 22 rotates in a reverse direction (counterclockwise rotation as viewed in the drawing), the second blade 221 tilts counterclockwise, the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 because the second blade 221 tilts counterclockwise, and the tilting direction of the first blade 211 is different from the tilting direction of the second blade 221. In another preferred case, as shown in fig. 8, the first blade 211 and the second blade 221 are both straight blades, when the first-stage impeller portion 21 rotates in a forward direction (clockwise rotation as viewed in the drawing), the first blade 211 can guide the air entering the housing 1 from the air inlet 4 to the first volute tongue 31 because the first blade 211 tilts clockwise, and similarly, when the second-stage impeller portion 22 rotates in a reverse direction (counterclockwise rotation as viewed in the drawing), the second blade 221 tilts counterclockwise, the second blade 221 can guide the air entering the housing 1 from the air inlet 4 to the second volute tongue 32 because the second blade 221 tilts counterclockwise, and the tilting direction of the first blade 211 is different from the tilting direction of the second blade 221. In another specific preferred case, as shown in fig. 9, the first blade 211 and the second blade 221 are both straight blades, and the first blade 211 and the second blade 221 are both disposed in the radial direction of the impeller 2, and in this specific case, the inclination directions of the first blade 211 and the second blade 221 are the same. It should be noted that the above-mentioned cases are only preferred cases, and the first blade 211 and the second blade 221 can be configured in other shapes, for example, the first blade 211 and the second blade 221 can be configured as "V" shaped blades or "L" shaped blades, etc., and such flexible adjustment and change can be achieved without departing from the principle and scope of the present invention, which should be limited within the protection scope of the present invention.
Preferably, as shown in fig. 6 to 11, the impeller 2 is provided with an air guide structure 6, and the air guide structure 6 is provided to guide the air entering the casing 1. The air guide structure 6 includes a first air guide frustum 6A and a second air guide frustum 6B which are connected, a taper end 6A1 of the first air guide frustum 6A is arranged near the first air inlet 41, a taper end 6B1 of the second air guide frustum 6B is arranged near the second air inlet 42, air flows to the first-layer impeller portion 21 under the guidance of the first air guide frustum 6A after entering from the first air inlet 41, and air flows to the second-layer impeller portion 22 under the guidance of the second air guide frustum 6B after entering from the second air inlet 42. Of course, air guide structure 6 can also set up to other air guide structures such as two connected triangular pyramids, and this kind of adjustment and change to air guide structure 6's concrete structural style are not skew the utility model discloses a principle and scope all should be injectd within the protection scope.
EXAMPLE III
The third embodiment of the present invention is described below with reference to fig. 12 to 15, wherein fig. 12 is the first embodiment of the third embodiment of the centrifugal fan, fig. 13 is the second embodiment of the third embodiment of the centrifugal fan, fig. 14 is the first embodiment of the third embodiment of the centrifugal fan, and fig. 15 is the second embodiment of the third embodiment of the centrifugal fan.
As shown in fig. 12 to 14, the centrifugal fan of the present embodiment includes a housing 1, and an impeller 2 and a volute tongue 3 disposed in the housing 1, wherein an air inlet 4 and an air outlet 5 are disposed on the housing 1, the volute tongue 3 includes a first volute tongue 31 and a second volute tongue 32 which are stacked and staggered with each other, the impeller 2 is a single-layer impeller, the single-layer impeller includes an impeller portion 23 disposed corresponding to the first volute tongue 31 and the second volute tongue 32, the impeller portion 23 includes a plurality of annularly disposed blades 231, and the plurality of blades 231 are collectively disposed to be able to guide air entering the housing 1 from the air inlet 4 to the first volute tongue 31 and the second volute tongue 32 when the impeller portion 23 rotates forward or backward. The air inlet 4 is disposed on the top plate 11 of the housing 1, and of course, the air inlet 4 may be disposed on the bottom plate 12 of the housing 1, the first volute tongue 31 is disposed on the upper portion of the left side plate 13 of the housing 1, that is, disposed near the top plate 11, and the second volute tongue 32 is disposed on the lower portion of the right side plate 14 of the housing 1, that is, disposed near the bottom plate 12, such that when the impeller 2 rotates in the forward direction (clockwise rotation as viewed in the drawing), the first volute tongue 31 can cut the air blown from the upper half portion of the impeller portion 23 and guide the air to the air outlet 5, and when the impeller 2 rotates in the reverse direction (counterclockwise rotation as viewed in the drawing), the second volute tongue 32 can cut the air blown from the lower half portion of the impeller portion 23 and guide the air to the air outlet 5.
Preferably, as shown in fig. 13 and 14, the plurality of blades 231 are all straight blades and are arranged in the radial direction of the single-layer impeller. With this arrangement, the centrifugal fan can blow out the same amount of wind when the impeller 2 is rotated in the forward and reverse directions. Of course, the blades 231 may be disposed at a specific angle with respect to the radial direction of the single-layer impeller, or the blades 231 may be disposed in other shapes, for example, the blades 231 may be disposed as arc-shaped blades (exactly arc-shaped blades shown in fig. 15), "V" -shaped blades, "L" -shaped blades, etc., and such flexible adjustment and change do not depart from the principles and scope of the present invention, which should be limited within the protection scope of the present invention.
Preferably, as shown in fig. 12 and 13, the impeller 2 is provided with an air guide structure 6, and the air guide structure 6 is provided to guide the air entering the casing 1. The air guide structure 6 is an air guide frustum 6, a tapered end 61 of the air guide frustum 6 is arranged close to the air inlet 4, and air enters from the air inlet 4 and then flows to the impeller portion 23 under the guidance of the air guide frustum 6. Of course, air guide structure 6 can also set up to other air guide structures such as triangular pyramid, and this kind of adjustment and the change to air guide structure 6's concrete structural style are not skew the utility model discloses a principle and scope all should be injectd within the protection scope.
Example four
The technical solution of the fourth embodiment of the present invention is explained below with reference to fig. 16 to 19, wherein fig. 16 is the first schematic structural diagram of the fourth embodiment of the centrifugal fan of the present invention, fig. 17 is the second schematic structural diagram of the fourth embodiment of the centrifugal fan of the present invention, fig. 18 is the schematic structural diagram of the impeller of the fourth embodiment of the centrifugal fan of the present invention, and fig. 19 is the cross-sectional view of fig. 18.
As shown in fig. 16 and 17, the centrifugal fan of the present embodiment includes a housing 1, and an impeller 2 and a volute tongue 3 disposed in the housing 1, wherein an air inlet 4 and an air outlet 5 are disposed on the housing 1, the volute tongue 3 includes a first volute tongue 31 and a second volute tongue 32 which are stacked and staggered with each other, the impeller 2 is a single-layer impeller, the single-layer impeller includes an impeller portion 23 disposed corresponding to the first volute tongue 31 and the second volute tongue 32, the impeller portion 23 includes a plurality of annularly disposed blades 231, and the plurality of blades 231 are collectively disposed to be able to guide air entering the housing 1 from the air inlet 4 to the first volute tongue 31 and the second volute tongue 32 when the impeller portion 23 rotates forward or backward. Wherein, the number of the air inlets 4 is two, the air inlets 4 include a first air inlet 41 and a second air inlet (not shown in the figure), the first air inlet 41 and the second air inlet are respectively arranged at two sides of the housing 1, the first air inlet 41 can be arranged on the top plate 11 of the shell 1, the second air inlet is arranged on the bottom plate 12 of the shell 1, the first volute tongue 31 is arranged on the upper part of the left side plate 13 of the shell 1, i.e., adjacent to the top plate 11, the second volute tongue 32 is arranged at the lower part of the right side plate 14 of the housing 1, i.e. close to the bottom plate 12, when the impeller 2 is rotated in the forward direction (clockwise when viewed from the figure), the first volute tongue 31 can cut the air blown from the upper half of the impeller portion 23 and guide the air to the air outlet 5, when the impeller 2 rotates in the reverse direction (counterclockwise in the drawing), the second volute tongue 32 cuts the air blown from the lower half of the impeller portion 23 and guides the air to the air outlet 5.
It should be noted that, in the case that two air inlets 4 are provided, an output shaft of a driving motor (not shown in the figure) for driving the impeller 2 to rotate may extend from the first air inlet 41 or the second air inlet to be connected to the impeller 2, if the output shaft of the driving motor extends from the first air inlet 41, a gap needs to be formed between the driving motor and the first air inlet 41 to avoid influencing air entering the casing 1 from the first air inlet 41, and similarly, if the output shaft of the driving motor extends from the second air inlet, a gap needs to be formed between the driving motor and the second air inlet to avoid influencing air entering the casing 1 from the second air inlet.
Preferably, as shown in fig. 17, the plurality of blades 231 are all straight blades and are arranged in the radial direction of the single-layer impeller. With this arrangement, the centrifugal fan can blow out the same amount of wind when the impeller 2 is rotated in the forward and reverse directions. Of course, the blades 231 may be disposed at a specific angle with respect to the radial direction of the single-layer impeller, or the blades 231 may be disposed in other shapes, for example, the blades 231 may be disposed as arc-shaped blades, "V" shaped blades or "L" shaped blades, etc., and such flexible adjustment and change may not depart from the principle and scope of the present invention, which should be limited within the scope of the present invention.
Preferably, as shown in fig. 16 to 19, the impeller 2 is provided with an air guide structure 6, and the air guide structure 6 is provided so as to guide the air entering the casing 1. The air guide structure 6 comprises a first air guide frustum 6A and a second air guide frustum 6B which are connected, a conical end 6A1 of the first air guide frustum 6A is arranged close to the first air inlet 41, a conical end 6B1 of the second air guide frustum 6B is arranged close to the second air inlet, air flows to the upper half portion of the impeller portion 23 under the guiding of the first air guide frustum 6A after entering from the first air inlet 41, and air flows to the lower half portion of the impeller portion 23 under the guiding of the second air guide frustum 6B after entering from the second air inlet. Of course, air guide structure 6 can also set up to other air guide structures such as two connected triangular pyramids, and this kind of adjustment and change to air guide structure 6's concrete structural style are not skew the utility model discloses a principle and scope all should be injectd within the protection scope.
Finally, the utility model also provides a clothes dryer, this clothes dryer includes the centrifugal fan of embodiment one, embodiment two, embodiment three or embodiment four.
So far, the technical solution of the present invention has been described with reference to the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, a person skilled in the art can make equivalent changes or substitutions to the related technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.
Claims (14)
1. A centrifugal fan is characterized by comprising a shell, an impeller and a volute tongue, wherein the impeller and the volute tongue are arranged in the shell, an air inlet and an air outlet are formed in the shell, the volute tongue comprises a first volute tongue and a second volute tongue which are stacked and arranged in a staggered mode, the impeller is arranged to be capable of sucking air into the shell from the air inlet when rotating, the first volute tongue is arranged to be capable of cutting air blown by the impeller and guiding the air to the air outlet when the impeller rotates in a forward direction, and the second volute tongue is arranged to be capable of cutting air blown by the impeller and guiding the air to the air outlet when the impeller rotates in a reverse direction.
2. The centrifugal fan of claim 1, wherein the impeller is a double-layer impeller including a first layer of impeller portions disposed corresponding to the first volute tongue and a second layer of impeller portions disposed corresponding to the second volute tongue, and wherein an axis of the first layer of impeller portions coincides with an axis of the second layer of impeller portions.
3. The centrifugal fan as claimed in claim 2, wherein the first impeller portion includes a plurality of first vanes arranged in a ring shape, the plurality of first vanes are collectively arranged to guide the air entering the housing from the air inlet to the first volute tongue when the first impeller portion rotates in a forward direction, and the second impeller portion includes a plurality of second vanes arranged in a ring shape, the plurality of second vanes are collectively arranged to guide the air entering the housing from the air inlet to the second volute tongue when the second impeller portion rotates in a reverse direction.
4. The centrifugal fan as claimed in claim 3, wherein the first blade and the second blade are both arc-shaped blades, and the first blade and the second blade are inclined in different directions.
5. The centrifugal fan as claimed in claim 3, wherein the first blade and the second blade are both straight blades, and the direction of the tilt of the first blade and the direction of the tilt of the second blade are the same or different.
6. The centrifugal fan as claimed in claim 1, wherein the impeller is a single-layer impeller including an impeller portion corresponding to the first and second volute tongues, the impeller portion including a plurality of annularly disposed blades collectively configured to direct air entering the housing from the air inlet to the first and second volute tongues when the impeller portion rotates in either a forward or reverse direction.
7. The centrifugal fan as claimed in claim 6, wherein the plurality of blades are all straight blades and are arranged in a radial direction of the single-layer impeller.
8. The centrifugal fan according to any one of claims 1 to 7, wherein the number of the air inlets is one, and the air inlets are provided at one side of the housing.
9. The centrifugal fan as claimed in claim 8, wherein an air guide structure is provided in the impeller, the air guide structure being configured to guide air entering the housing.
10. The centrifugal fan as claimed in claim 9, wherein the air guiding structure is an air guiding frustum, and a conical end of the air guiding frustum is disposed near the air inlet.
11. The centrifugal fan according to any one of claims 1 to 7, wherein the number of the air inlets is two, and the air inlets include a first air inlet and a second air inlet, and the first air inlet and the second air inlet are respectively disposed at two sides of the housing.
12. The centrifugal fan as claimed in claim 11, wherein an air guide structure is provided in the impeller, the air guide structure being configured to guide air entering the housing.
13. The centrifugal fan as claimed in claim 12, wherein the air guiding structure includes a first air guiding frustum and a second air guiding frustum connected to each other, a tapered end of the first air guiding frustum is disposed near the first air inlet, and a tapered end of the second air guiding frustum is disposed near the second air inlet.
14. Laundry dryer, characterized in that it comprises a centrifugal fan according to any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920758723.6U CN210343751U (en) | 2019-05-23 | 2019-05-23 | Centrifugal fan and clothes dryer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920758723.6U CN210343751U (en) | 2019-05-23 | 2019-05-23 | Centrifugal fan and clothes dryer |
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| CN210343751U true CN210343751U (en) | 2020-04-17 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020233471A1 (en) * | 2019-05-23 | 2020-11-26 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothing dryer |
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2019
- 2019-05-23 CN CN201920758723.6U patent/CN210343751U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020233471A1 (en) * | 2019-05-23 | 2020-11-26 | 青岛海尔滚筒洗衣机有限公司 | Centrifugal fan and clothing dryer |
| US11808280B2 (en) | 2019-05-23 | 2023-11-07 | Qingdao Haier Drum Washing Machine Co., Ltd. | Centrifugal fan and clothing dryer |
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