CN111810445A - Centrifugal fan shell, centrifugal fan and clothes dryer - Google Patents
Centrifugal fan shell, centrifugal fan and clothes dryer Download PDFInfo
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- CN111810445A CN111810445A CN201910295495.8A CN201910295495A CN111810445A CN 111810445 A CN111810445 A CN 111810445A CN 201910295495 A CN201910295495 A CN 201910295495A CN 111810445 A CN111810445 A CN 111810445A
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- 241000886569 Cyprogenia stegaria Species 0.000 title description 2
- 230000007704 transition Effects 0.000 claims description 21
- 238000013517 stratification Methods 0.000 claims description 9
- 230000007423 decrease Effects 0.000 claims description 7
- 230000003247 decreasing effect Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000009423 ventilation Methods 0.000 description 3
- 230000032798 delamination Effects 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000005381 potential energy Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
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Classifications
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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
- F04D29/4226—Fan casings
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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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 belongs to the technical field of fans and aims to solve the problem that the working efficiency of a centrifugal fan is influenced because airflow disorder is easy to occur in an air duct of the conventional centrifugal fan. Therefore, the invention provides a shell of a centrifugal fan, the centrifugal fan and a clothes dryer, wherein a layered structure is arranged in an air duct of the shell, the layered structure is set to be capable of dividing at least one part of the air duct into at least two air layers, and the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end. Through set up layered structure in the wind channel, separate the wind channel for two at least wind layers, and make the width that is close to the wind layer of strong wind end be greater than the width that is close to the wind layer of weak wind end, adjust the width in weak wind end wind channel through layered structure promptly, so that the width in weak wind end wind channel matches with the gas flow phase-match of weak wind end, take place with the condition that can't be full of the air current in avoiding appearing the wind channel, can avoid taking place the turbulent condition of air current in the wind channel, can avoid influencing centrifugal fan's work efficiency.
Description
Technical Field
The invention belongs to the technical field of fans, and particularly provides a shell of a centrifugal fan, the centrifugal fan and a clothes 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 (pressure). Centrifugal fans are widely used in ventilation, dust removal and cooling of factories, mines, tunnels, cooling towers, vehicles, ships and buildings; ventilation and draught of boilers and industrial furnaces; cooling and ventilation in air conditioning equipment and household appliances; drying and selecting grains; wind tunnel wind source and air cushion boat inflation and propulsion.
Taking a clothes dryer as an example, a centrifugal fan is generally adopted as a fan on the existing clothes dryer, the centrifugal fan comprises a driving motor, a shell and an impeller arranged in the shell, the driving motor can drive the impeller to rotate at a high speed so as to accelerate air, the air enters from one end of the shell and flows to the other end, the air flow at the air inlet end of the shell is larger than that at the other end of the shell, the air flow at the air inlet end of the shell is a strong wind end due to large air flow, the air flow at the other end of the shell is a weak wind end due to small air flow, however, because the air duct width of the strong wind end in the shell is the same as that of the weak wind end, the air duct of the weak wind end with small air flow can not be filled with the air flow easily, and the part without the air flow can generate negative pressure to cause air flow disorder, thereby affecting the working efficiency of the centrifugal fan and further affecting the working efficiency of the clothes dryer.
Therefore, there is a need in the art for a new centrifugal fan housing and a corresponding centrifugal fan and dryer to solve the above problems.
Disclosure of Invention
In order to solve the problems in the prior art, namely the problem that the working efficiency of the centrifugal fan is affected due to the fact that airflow disorder is prone to occur in an air duct of the existing centrifugal fan, the invention provides a shell of the centrifugal fan, wherein a layered structure is arranged in the air duct of the shell, at least one part of the air duct can be divided into at least two air layers, and the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end.
In a preferred embodiment of the above housing, the layered structure is disposed near an outlet end of the air duct.
In a preferred technical solution of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and the layered table divides the air duct into a first air layer and a second air layer, wherein the first air layer is close to the strong wind end, and the second air layer is close to the weak wind end.
In a preferred embodiment of the above casing, a cross-sectional width of the layering stage gradually increases along a direction in which the gas flows toward the outlet end of the air duct.
In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.
In a preferred embodiment of the above casing, the height of the layering stage gradually decreases along a direction in which the gas flows toward the outlet end of the air duct.
In a preferred embodiment of the above casing, the height of the layering stage gradually decreases along a direction in which the gas flows toward the outlet end of the air duct.
In a preferred embodiment of the above casing, an inner side surface of the layering stage is provided to be inclined with respect to an inner wall of the casing.
In a preferred embodiment of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and the layered table includes at least two steps so as to divide the air duct into at least three air layers.
In a preferred embodiment of the above casing, a cross-sectional width of each step of the layering stage gradually increases along a direction in which the gas flows toward an outlet end of the air duct.
In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.
In a preferred embodiment of the above casing, the height of each step of the layering stage gradually decreases along the direction of the gas flowing to the outlet end of the air duct.
In a preferred embodiment of the above casing, the height of each step of the layering stage gradually decreases along the direction of the gas flowing to the outlet end of the air duct.
In a preferred embodiment of the above casing, the layered structure is a layered table attached to or formed on an inner wall of the casing, and an inner side surface of the layered table extends obliquely from the inner wall of the casing to a bottom wall of the casing.
In a preferred embodiment of the above casing, a cross-sectional width of the layering stage gradually increases along a direction in which the gas flows toward the outlet end of the air duct.
In the preferable technical scheme of the shell, the windward end of the layering platform is in smooth transition with the inner wall of the shell.
In a preferred embodiment of the above casing, a height of a position where the layering stage intersects with an inner wall of the casing is gradually reduced along a direction in which the gas flows toward an outlet end of the air duct.
In a preferred embodiment of the above casing, a height of a position where the layering stage intersects with an inner wall of the casing is gradually reduced along a direction in which the gas flows toward an outlet end of the air duct.
In a preferred embodiment of the above casing, the layered structure is fixedly connected to or integrated with an inner wall of the casing.
In the preferred embodiment of the above casing, the height of the layering stage is 1/2 to 3/4 of the height of the inner wall of the casing.
In another aspect, the invention also provides a centrifugal fan comprising the housing described above.
In another aspect, the present invention also provides a clothes dryer including the centrifugal fan described above.
The technical scheme includes that the air duct is divided into at least two air layers by the layered structure, the width of the air layer close to the strong air end is larger than that of the air layer close to the weak air end, namely, the width of the air duct at the weak air end is adjusted by the layered structure, so that the width of the air duct at the weak air end is matched with the air flow of the weak air end, the situation that the air duct cannot be filled with air flow is avoided, the situation that air flow is disordered in the air duct can be avoided, and the working efficiency of the centrifugal fan is further prevented from being influenced.
Further, the windward end of the layering platform is in smooth transition with the inner wall of the shell. By enabling the windward end to be in smooth transition with the inner wall of the shell, the airflow on the inner wall of the shell can be smoothly transited to the inner side surface of the layering platform.
In addition, the centrifugal fan further provided on the basis of the technical scheme of the invention has the technical effects of the shell due to the adoption of the shell, and compared with the centrifugal fan before improvement, the centrifugal fan hardly generates airflow disorder in the air duct, so that the working efficiency is greatly improved.
Drawings
Preferred embodiments of the present invention are described below with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of a centrifugal fan of the present invention;
FIG. 2 is a schematic structural diagram of a first embodiment of a centrifugal fan according to the present invention;
FIG. 3 is a schematic structural view of a second embodiment of the centrifugal fan of the present invention;
fig. 4 is a schematic structural view of a centrifugal fan according to a third embodiment of the present invention.
Detailed Description
First, it should be understood by those skilled in the art that the embodiments described below are merely for explaining technical principles 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 "front", "back", "upper", "middle", "lower", "top", "bottom", "inner", "outer", etc. indicating 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 meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The problem that the working efficiency of the centrifugal fan is affected due to airflow disorder easily occurs in an air duct of the existing centrifugal fan pointed out based on the background technology. The invention provides a shell of a centrifugal fan, the centrifugal fan and a clothes dryer, and aims to effectively avoid the condition of airflow disorder in an air duct of the centrifugal fan so as to avoid influencing the working efficiency of the centrifugal fan.
Specifically, as shown in fig. 1, the centrifugal fan of the present invention includes a casing 1, an impeller is disposed in the casing 1, a layered structure is disposed in an air duct of the casing 1, the layered structure is configured to divide at least a portion of the air duct into at least two air layers, and a width of the air layer near a strong wind end is greater than a width of the air layer near a weak wind end. Known from the background art, because gas gets into and upward flows from the bottom of casing 1, flow around after assaulting the impeller back plate, therefore, the airflow at casing 1 top is greater than the airflow of casing 1 bottom, the top of casing 1 is because the airflow is big, for the strong wind end, the bottom of casing 1 is because the airflow is little, for the weak wind end, because the wind channel width of strong wind end (being the top of casing 1) is the same with the wind channel width of weak wind end (being the bottom of casing 1) in casing 1, easily lead to the wind channel of the weak wind end that the airflow is little can not be full of the air current, the position that does not have the air current then can produce the negative pressure, cause the air current disorder, thereby influence centrifugal fan's work efficiency. Therefore, the layered structure is arranged in the air duct, the air duct is divided into at least two air layers through the layered structure, the width of the air layer close to the strong air end is larger than that of the air layer close to the weak air end, namely, the width of the air duct at the weak air end is adjusted through the layered structure, so that the width of the air duct at the weak air end is matched with the air flow at the weak air end, and the condition that the air duct cannot be filled with air flow can be avoided. Wherein, the layered structure and the inner wall of the housing 1 can be fixedly connected or integrated, and those skilled in the art can flexibly set the specific connection form of the layered structure and the inner wall of the housing 1 in practical application as long as the layered structure and the inner wall of the housing 1 can be fixedly connected. Furthermore, the layered structure may be disposed within the entire duct, or a segment of the duct, in a preferred case, the layered structure may be disposed near the outlet end 4 of the duct, etc., and such adjustments and changes to the specific disposition of the layered structure should be within the scope of the present invention without departing from the spirit and scope of the present invention. It should be noted that in the present application, the phrase "the layered structure is disposed near the outlet end of the air duct" includes both the case that the layered structure is disposed at the outlet end of the air duct and the case that the layered structure slightly extends towards the inside of the air duct, and the specific extension range may be different in different application scenarios, and in principle, the extension range of the layered structure extending inwards in the air flow direction should not exceed the center line of the impeller.
The technical solution of the present invention will be explained in detail below by taking the layered structure provided at the outlet end 4 of the air duct as an example.
Example one
The technical solution of the first embodiment of the present invention is described below with reference to fig. 2, wherein fig. 2 is a schematic structural diagram of the first embodiment of the centrifugal fan of the present invention.
As shown in fig. 2, the centrifugal fan of the present invention includes a casing 1, an impeller 2 is disposed in the casing 1, and a layered structure is disposed in an air duct of the casing 1, the layered structure is a layered platform 3A attached to or formed on an inner wall 11 of the casing 1, and the layered platform 3A divides the air duct into a first air layer and a second air layer (an upper layer and a lower layer, respectively, but not shown in fig. 2), wherein the first air layer is close to a strong air end, and the second air layer is close to a weak air end. Divide the wind channel in casing 1 for two wind layers, first wind layer and second wind layer through layering platform 3A promptly, first wind layer is close to strong wind end, is located the top of casing 1 promptly, and the second wind layer is close to weak wind end, is located the bottom of casing 1 promptly. As can be seen from the foregoing, since the gas enters from the bottom of the casing 1 and flows upward, and flows around after striking the impeller back 21, the flow rate of the gas at the top of the casing 1 is greater than the flow rate of the gas at the bottom of the casing 1, and therefore, the width of the first wind layer is greater than the width of the second wind layer. Wherein, the layered platform 3A may be integrally formed with the inner wall 11 of the housing 1, that is, the layered platform 3A is a structure formed on the inner wall 11 of the housing 1, or the layered platform 3A may also be provided as a separate member, and is attached to the inner wall 11 of the housing 1 by means of adhesion, magnetic adsorption, riveting, or the like, and those skilled in the art may flexibly set the specific connection form between the layered platform 3A and the inner wall 11 of the housing 1 in practical application as long as the layered platform 3A can be fixedly connected with the inner wall 11 of the housing 1. Furthermore, it was verified through trial and error by the inventors that when the height of the layered table 3A (H shown in fig. 2) is 1/2 to 3/4 which is the height of the inner wall 11 of the housing 1, the occurrence of turbulence in the air flow in the air passage can be better avoided. Of course, the protection scope of the present invention is not limited thereto, and in practical applications, the height of the layered platform 3A may be set to other values, which also fall within the protection scope of the present invention. In addition, it should be noted that, in practical applications, a person skilled in the art may divide the air duct located in the second air layer into a plurality of air layers according to the distribution of the air flow in the air duct. In a preferred case, the inner side surface 3A2 of the layered platform 3A may be disposed obliquely (i.e., inclined with respect to the vertical direction) with respect to the inner wall 11 of the casing 1, and the layered platform 3A smoothly divides the air duct of the second air layer into an infinite number of smoothly-transitional air layers.
Preferably, the width of the cross-section of the lamination stage 3A becomes gradually larger in the direction of the gas flow towards the outlet end 4 of the air duct. Since the width of the air duct is gradually increased along the direction of the air flowing to the outlet end 4 of the air duct, in order to ensure that the width of the second wind layer matches with the air flow of the second wind layer, the cross-sectional width (L shown in fig. 2) of the delamination stage 3A is also gradually increased along the direction of the air flowing to the outlet end 4 of the air duct.
Preferably, the windward end 3A1 of the layered platform 3A transitions smoothly with the inner wall 11 of the housing 1. By making the windward end 3A1 smoothly transition to the inner wall 11 of the casing 1, the airflow on the inner wall 11 of the casing 1 can smoothly transition to the inner side surface 3A2 of the layered platform 3A.
Preferably, the height of the stratification station 3A becomes gradually lower in the direction of the gas flow towards the outlet end 4 of the air duct. The height of the stratification station 3A is designated H in fig. 2, the value of H gradually decreasing from the windward end 3A1 of the stratification station 3A in the direction of the gas flow towards the outlet end 4 of the air duct.
Example two
The technical solution of the second embodiment of the present invention is described below with reference to fig. 3, wherein fig. 3 is a schematic structural diagram of the second embodiment of the centrifugal fan of the present invention.
As shown in fig. 3, the centrifugal fan of the present invention includes a casing 1, an impeller 2 is provided in the casing 1, a layered structure is provided in an air duct of the casing 1, the layered structure is a layered table 3B attached to or formed on an inner wall 11 of the casing 1, and the layered table 3B includes two stepped portions so as to divide the air duct into three air layers. Wherein, the layering platform 3B includes first step 3B1 and second step 3B2, divide the wind channel into three wind layers through first step 3B1 and second step 3B2, the windward layer, well stroke layer and leeward layer, the windward layer is close to strong wind end, be located the top of casing 1 promptly, the leeward layer is close to weak wind end, be located the bottom of casing 1 promptly, well stroke layer is located between windward layer and leeward layer, from the foregoing, because the gas is got into and upwards flows from the bottom of casing 1, flow around after impacting impeller back plate 21, therefore, the airflow at the top of casing 1 is greater than the airflow at the bottom of casing 1, therefore, the width of windward layer is greater than the width of leeward layer, the width of well stroke layer is greater than the width of leeward layer and is less than the width of windward layer. Of course, the layering stage 3B is not limited to two step portions, that is, the air duct is not limited to three air layers, and those skilled in the art can flexibly set the specific number of the air layers in the air duct according to the specific distribution of the air flow in the air duct in practical application as long as the condition of air flow disorder in the air duct can be avoided. Wherein, the layering stage 3B can be formed integrally with the inner wall 11 of the housing 1, that is, the layering stage 3B is a structure formed on the inner wall 11 of the housing 1, or the layering stage 3B can also be provided as a separate component and attached to the inner wall 11 of the housing 1 by means of adhesion, magnetic adsorption, riveting or the like, and those skilled in the art can flexibly set the specific connection form of the layering stage 3B and the inner wall 11 of the housing 1 in practical application as long as the layering stage 3B and the inner wall 11 of the housing 1 can be fixedly connected.
Preferably, as shown in FIG. 3, the cross-sectional width of each step of the stratification station 3B becomes gradually larger along the direction of the gas flow toward the outlet end 4 of the air duct. Since the width of the air duct is gradually increased along the direction of the air flowing to the outlet end 4 of the air duct, in order to ensure that the width of the air duct matches with the air flow of the air duct, the width of the cross section of the first step portion 3B1 (L1 shown in fig. 3) is also gradually increased along the direction of the air flowing to the outlet end 4 of the air duct, and similarly, in order to ensure that the width of the leeward layer matches with the air flow of the leeward layer, the width of the cross section of the second step portion 3B2 (L2 shown in fig. 3) is also gradually increased along the direction of the air flowing to the outlet end 4 of the air duct.
Preferably, the windward end of the layered platform 3B is in smooth transition with the inner wall 11 of the housing 1. That is, the windward end 3B11 of the first stepped portion 3B1 smoothly transitions to the inner wall 11 of the casing 1, and the windward end 3B11 of the first stepped portion 3B1 smoothly transitions to the inner wall 11 of the casing 1, whereby the airflow on the inner wall 11 of the casing 1 can smoothly transition to the inner side surface 3B12 of the first stepped portion 3B 1. Similarly, the windward end 3B21 of the second stepped portion 3B2 smoothly transitions to the inner wall 11 of the housing 1, and the windward end 3B21 of the second stepped portion 3B2 smoothly transitions to the inner wall 11 of the housing 1, so that the airflow on the inner wall 11 of the housing 1 can smoothly transition to the inner side surface 3B22 of the second stepped portion 3B 2.
Preferably, the height of each step of the stratification station 3B becomes gradually lower along the direction of the gas flow towards the outlet end 4 of the air duct. The height of the first step 3B1 is H1 in fig. 3, the value of H1 is gradually decreased from the windward end 3B11 of the first step 3B1 along the direction of the gas flowing to the outlet end 4 of the wind channel, the height of the second step 3B2 is H2 in fig. 3, and the value of H2 is gradually decreased from the windward end 3B21 of the second step 3B2 along the direction of the gas flowing to the outlet end 4 of the wind channel.
EXAMPLE III
The third embodiment of the present invention will be described with reference to fig. 4, wherein fig. 4 is a schematic structural diagram of the third embodiment of the centrifugal fan of the present invention.
As shown in fig. 4, the centrifugal fan of the present invention includes a casing 1, an impeller 2 is provided in the casing 1, a layered structure is provided in an air duct of the casing 1, the layered structure is a layered table 3C attached to or formed on an inner wall 11 of the casing 1, and an inner side surface 3C2 of the layered table 3C extends obliquely from the inner wall 11 of the casing 1 to a bottom wall 12 of the casing 1. That is, the layering stage 3C smoothly divides the air duct into an infinite number of smoothly-transiting air layers, and as is apparent from the above description, since the air flows upward after entering from the bottom of the casing 1 and flows around after striking the impeller back 21, the air flow rate at the top of the casing 1 is greater than the air flow rate at the bottom of the casing 1, and therefore, the width of the air layer near the strong wind end (located at the top of the casing 1) is greater than the width of the air layer near the weak wind end (located at the bottom of the casing 1). Wherein, the layering stage 3C can be formed integrally with the inner wall 11 of the housing 1, that is, the layering stage 3C is a structure formed on the inner wall 11 of the housing 1, or the layering stage 3C can also be provided as a separate component and attached to the inner wall 11 of the housing 1 by means of adhesion, magnetic adsorption, riveting or the like, and those skilled in the art can flexibly set the specific connection form of the layering stage 3C and the inner wall 11 of the housing 1 in practical application as long as the layering stage 3C and the inner wall 11 of the housing 1 can be fixedly connected.
Preferably, as shown in FIG. 4, the cross-sectional width of the lamination stage 3C becomes progressively larger along the direction of gas flow toward the outlet end 4 of the tunnel. Since the width of the air duct is gradually increased along the direction of the air flowing to the outlet end 4 of the air duct, in order to ensure that the width of each wind layer can be matched with the air flow of the wind layer, the cross-sectional width (L shown in fig. 4) of the layered table 3C is also gradually increased along the direction of the air flowing to the outlet end 4 of the air duct.
Preferably, as shown in fig. 4, the windward end 3C1 of the delamination stage 3C smoothly transitions with the inner wall 11 of the housing 1. By making the windward end 3C1 smoothly transition to the inner wall 11 of the casing 1, the airflow on the inner wall 11 of the casing 1 can smoothly transition to the inner side surface 3C2 of the deck 3C.
Preferably, as shown in fig. 4, the height of the position where the layering stage 3C intersects the inner wall 11 of the casing 1 (or the line where the inner side surface 3C2 intersects the inner wall 11) becomes gradually lower along the direction in which the air flows toward the outlet end 4 of the air duct. More specifically, the height of the location where the stratification station 3C intersects the inner wall 11 is referred to as H in fig. 4, the value of H gradually decreasing from the windward end 3C1 of the stratification station 3C in the direction of the gas flow towards the outlet end 4 of the air duct.
Finally, the present invention also provides a clothes dryer including the centrifugal fan of the first embodiment, the second embodiment or the third embodiment.
So far, the technical solutions of the present invention have been described in connection with 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. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (22)
1. The shell of the centrifugal fan is characterized in that a layered structure is arranged in an air duct of the shell, and the layered structure is set to be capable of dividing at least one part of the air duct into at least two air layers, wherein the width of the air layer close to a strong air end is larger than that of the air layer close to a weak air end.
2. The housing of claim 1, wherein the layered structure is disposed proximate an outlet end of the air chute.
3. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, the layered table dividing the wind tunnel into a first wind layer and a second wind layer, wherein the first wind layer is proximate the strong wind end and the second wind layer is proximate the weak wind end.
4. The housing of claim 3, wherein the cross-sectional width of the tiered platform increases in a direction of gas flow toward the outlet end of the air chute.
5. The housing of claim 3 or 4, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.
6. The housing of claim 3 or 4, wherein the height of the stratification station decreases in a direction of gas flow towards the outlet end of the air duct.
7. The housing of claim 5, wherein the height of the tiered platforms is progressively lower in a direction of gas flow toward the outlet end of the air chute.
8. The housing of claim 3, wherein an inner side of the tiered platform is obliquely disposed relative to an inner wall of the housing.
9. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, the layered table comprising at least two steps to divide the air duct into at least three air layers.
10. The housing of claim 9, wherein each step of the tiered platform has a cross-sectional width that gradually increases in a direction of gas flow toward the outlet end of the air chute.
11. The housing of claim 9 or 10, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.
12. The housing of claim 9 or 10, wherein each step of the tiered platform has a height that gradually decreases in a direction of gas flow toward the outlet end of the air chute.
13. The housing of claim 11, wherein each step of the tiered platform has a height that gradually decreases in a direction of gas flow toward the outlet end of the air chute.
14. The housing of claim 1, wherein the layered structure is a layered table attached to or formed on an inner wall of the housing, an inner side of the layered table extending obliquely from the inner wall of the housing to the bottom wall of the housing.
15. The housing of claim 14, wherein the cross-sectional width of the tiered platform increases in a direction of gas flow toward the outlet end of the air chute.
16. The housing of claim 14 or 15, wherein the wind facing end of the tiered platform transitions smoothly with the inner wall of the housing.
17. The housing of claim 14 or 15, wherein the height of the location where the stratification station intersects the inner wall of the housing is gradually lower in the direction of the gas flow towards the outlet end of the air duct.
18. The housing of claim 16, wherein the layering stage intersects the interior wall of the housing at a progressively lower height along the direction of gas flow to the outlet end of the air chute.
19. The housing according to any one of claims 1 to 4, 8 to 10, 14 to 15, wherein the layered structure is fixedly connected to or provided integrally with an inner wall of the housing.
20. The enclosure of claim 3, wherein the height of the tiered platforms is 1/2-3/4 of the height of the interior walls of the enclosure.
21. A centrifugal fan, characterized in that it comprises a casing according to any one of claims 1 to 20.
22. Laundry dryer, characterized in that it comprises a centrifugal fan according to claim 21.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910295495.8A CN111810445A (en) | 2019-04-12 | 2019-04-12 | Centrifugal fan shell, centrifugal fan and clothes dryer |
| EP20787549.3A EP3954902A4 (en) | 2019-04-12 | 2020-04-08 | Housing of centrifugal fan, centrifugal fan and clothes dryer |
| PCT/CN2020/083765 WO2020207409A1 (en) | 2019-04-12 | 2020-04-08 | Housing of centrifugal fan, centrifugal fan and clothes dryer |
| US17/603,113 US11898575B2 (en) | 2019-04-12 | 2020-04-08 | Housing of centrifugal fan, centrifugal fan and clothes dryer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910295495.8A CN111810445A (en) | 2019-04-12 | 2019-04-12 | Centrifugal fan shell, centrifugal fan and clothes dryer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111810445A true CN111810445A (en) | 2020-10-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910295495.8A Pending CN111810445A (en) | 2019-04-12 | 2019-04-12 | Centrifugal fan shell, centrifugal fan and clothes dryer |
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| Country | Link |
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| CN (1) | CN111810445A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| IT202100021794A1 (en) * | 2021-08-11 | 2023-02-11 | Almes Srl | FORCED VENTILATION DEVICE |
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Country or region after: China Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. Country or region before: China Applicant before: QINGDAO HAIER JOINT STOCK Co.,Ltd. |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20240918 Address after: No. 558, Jiaozhouwan West Road, Huangdao District, Qingdao, Shandong 266400 Applicant after: Qingdao Haier Cleaning and Protection Electrical Appliance Co.,Ltd. Country or region after: China Applicant after: Haier Smart Home Co., Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER DRUM WASHING MACHINE Co.,Ltd. Country or region before: China Applicant before: Haier Smart Home Co., Ltd. |