CN112833048A - Volute, fan and cigarette machine - Google Patents

Volute, fan and cigarette machine Download PDF

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Publication number
CN112833048A
CN112833048A CN202011615769.6A CN202011615769A CN112833048A CN 112833048 A CN112833048 A CN 112833048A CN 202011615769 A CN202011615769 A CN 202011615769A CN 112833048 A CN112833048 A CN 112833048A
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CN
China
Prior art keywords
air inlet
air
edge
volute
airflow
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN202011615769.6A
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Chinese (zh)
Other versions
CN112833048B (en
Inventor
姚杨
谢川川
周慧慧
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Midea Group Co Ltd
Guangdong Midea White Goods Technology Innovation Center Co Ltd
Original Assignee
Midea Group Co Ltd
Guangdong Midea White Goods Technology Innovation Center Co Ltd
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Publication date
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Priority to CN202011615769.6A priority Critical patent/CN112833048B/en
Publication of CN112833048A publication Critical patent/CN112833048A/en
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Publication of CN112833048B publication Critical patent/CN112833048B/en
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/40—Casings; Connections of working fluid
    • F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
    • F04D29/44—Fluid-guiding means, e.g. diffusers
    • F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/66—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
    • F04D29/663—Sound attenuation
    • 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
    • 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
    • F04D29/68—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers
    • F04D29/681—Combating cavitation, whirls, noise, vibration or the like; Balancing by influencing boundary layers especially adapted for elastic fluid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes

Abstract

The invention discloses a volute, a volute side plate, a fan and a range hood, wherein the volute comprises a surrounding plate, two side plates and a protruding part, the two side plates are respectively covered on two sides of the surrounding plate, a first air outlet is defined between the two side plates and the surrounding plate, at least one side plate is provided with a first air inlet which is used as an air inlet side plate, the protruding part is arranged on the outer surface of the air inlet side plate, the thickness of the protruding part in the air inlet direction of air flow passing through the first air inlet is firstly increased and then decreased along the side plate edge connected with the surrounding plate to the first air inlet in the approaching direction of the first air inlet, so that the air flow flowing to the first air inlet is guided, the process that the air flow flows to the first air inlet can be more moderate, the generation of separated flow of the air flow at the edge of the volute is inhibited, the collision of the air flow to the bottom of the volute, the performance of the fan is improved.

Description

Volute, fan and cigarette machine
Technical Field
The invention relates to the technical field of kitchen appliances, in particular to a volute, a fan and a range hood.
Background
The smoke machine is used as a kitchen appliance with high kitchen use frequency, and the performance of the smoke machine directly influences the operation environment of a user, such as noise problems and the like. The fan is used as a core component of the cigarette machine and is also a main source of noise, and the performance of the fan can directly influence the smoking effect of the cigarette machine.
The inventor of this application discovers in long-term research and development, centrifugal fan is the more general fan of application in the cigarette machine at present, and centrifugal fan's impeller and driver set up in the spiral case, and when the oil smoke got into in the cigarette machine casing under the air current effect that centrifugal fan produced, can bump with the bottom of spiral case, just can get into in the spiral case afterwards, and the collision in-process can lead to the fact the flow loss to the air current, forms the flow separation district at the spiral case edge, thereby reduce centrifugal fan's performance, produce great noise.
Disclosure of Invention
The invention provides a volute, a fan and a range hood, and aims to solve the technical problems that in the prior art, airflow collides with the bottom of the volute of the fan to reduce the performance of the fan and generate larger noise in the working process of the range hood.
In order to solve the above technical problem, one technical solution adopted by the present invention is to provide a volute, including:
enclosing plates;
the two side plates are respectively covered on two sides of the enclosing plate, a first air outlet is defined between the two side plates and the enclosing plate, and a first air inlet is formed in at least one side plate to serve as an air inlet side plate;
protruding piece, protruding piece set up in the surface of air inlet curb plate, protruding piece is in the air current warp ascending thickness in the air inlet direction of first air intake along the air inlet curb plate with curb plate edge that the bounding wall is connected to the direction of being close to of first air intake increases earlier then reduces to be used for the counter flow direction the air current of first air intake carries out the water conservancy diversion.
In a specific embodiment, the surface of the protruding part is arranged in an arc surface.
In a specific embodiment, a plane where a highest point of the protruding member in an air inlet direction of the airflow passing through the first air inlet and an axis of the first air inlet are located together is parallel to an air outlet direction of the airflow passing through the first air outlet.
In a specific embodiment, the protruding part covers the outer surface of the air inlet side plate completely or partially.
In a specific embodiment, a first edge of the protruding part away from the first air inlet is tangent to the outer surface of the enclosing plate, and/or a second edge of the protruding part close to the first air inlet is tangent to the opening edge of the first air inlet.
In a specific embodiment, at least a part of a projection of the first edge in an air inlet direction of the air flow passing through the first air inlet is overlapped with an outer surface of the enclosure, and/or at least a part of a projection of the second edge in the air inlet direction of the air flow passing through the first air inlet is overlapped with an opening edge of the first air inlet.
In a specific embodiment, a first edge of the protrusion away from the first air inlet is tangent to the outer surface of the enclosure, and a joint of the first edge of the protrusion away from the first air inlet and the outer surface of the enclosure forms a fillet, where a radius corresponding to the fillet is 1/5 to 3/10 of a thickness of the enclosure in an air inlet direction of the air flow passing through the first air inlet.
In a specific embodiment, a first edge of the protrusion, which is far away from the first air inlet, is curved or straight, and/or a second edge of the protrusion, which is near to the first air inlet, is curved or straight.
In a specific embodiment, the first edge and the second edge are both curved, and the projection of the protruding part on the air inlet direction of the airflow passing through the first air inlet is crescent, C-shaped, circular or spiral; alternatively, the first and second electrodes may be,
the first edge and the second edge are straight lines, and the projection of the protruding part on the air inlet direction of the first air inlet is rectangular.
In a particular embodiment, the volute further comprises at least one of:
the rectifying plate is arranged on the protruding part, and the extending direction of the rectifying plate is parallel to the air outlet direction of the air flow passing through the first air outlet;
a vortex generator disposed on the boss.
In a particular embodiment, the vortex generator is wedge-shaped.
In a specific embodiment, the vortex generators are airfoil shaped.
In a particular embodiment, the vortex generator is concave.
In order to solve the above technical problem, another technical solution of the present invention is to provide a fan, including the above volute, a driver and an impeller, where the driver is disposed in the volute, and the driver is connected to the impeller and is used to drive the impeller to rotate so as to generate an air flow, and the air flow enters the volute from the first air inlet and is discharged from the first air outlet.
In order to solve the above technical problem, another technical solution adopted by the present invention is to provide a range hood, which includes a housing and the above fan, wherein the fan is disposed in the housing, the housing is formed with a second air inlet and a second air outlet, the second air inlet is communicated with the first air inlet of the volute, and the second air outlet is communicated with the first air outlet of the volute, so that an air flow generated by the driver driving the fan can enter the housing through the second air inlet, and enter the volute from the first air inlet after passing through the protruding member of the volute, and sequentially flow out through the first air outlet and the second air outlet.
In a specific embodiment, the two side plates of the volute are both provided with the protruding part, one of the side plates is arranged close to the second air inlet, and the other side plate is arranged far away from the second air inlet.
The volute comprises a surrounding plate, two side plates and a protruding part, wherein the two side plates are respectively covered on two sides of the surrounding plate, a first air outlet is defined between the two side plates and the surrounding plate, at least one side plate is provided with a first air inlet which is used as an air inlet side plate, the protruding part is arranged on the outer surface of the air inlet side plate, the thickness of the protruding part in the air inlet direction of airflow passing through the first air inlet is firstly increased and then reduced along the approaching direction of the side plate edge connected with the surrounding plate to the first air inlet so as to guide the airflow flowing to the first air inlet, the process of the airflow flowing to the first air inlet can be more relaxed, the generation of the separation flow of the airflow at the edge of the volute is inhibited, the collision of the airflow to the bottom of the volute is reduced, the resistance applied in the airflow flowing process is reduced, the noise generated by the collision, meanwhile, the protruding piece is simple in structure, small in occupied space and easy to prepare.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic perspective view of a volute of the present invention;
FIG. 2 is a schematic front view of a volute of the present invention;
FIG. 3 is a schematic cross-sectional view of the volute of FIG. 2 taken along the line A-A;
FIG. 4 is a schematic perspective view of another embodiment of the volute of the present invention;
FIG. 5 is a schematic perspective view of another embodiment of the volute of the present invention;
FIG. 6 is a schematic perspective view of another embodiment of the volute of the present invention;
FIG. 7 is a schematic perspective view of another embodiment of the volute of the present invention;
figure 8 is a front view schematic diagram of an embodiment of a cigarette making machine of the present invention;
fig. 9 is a schematic sectional structure view along the direction B-B of fig. 8.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
The terms "first" and "second" in this application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise. Furthermore, the terms "include" and "have," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. While the term "and/or" is merely one type of association that describes an associated object, it means that there may be three types of relationships, e.g., a and/or B, which may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
Referring to fig. 1 to 3, an embodiment of a scroll casing 101 of the present invention includes a shroud 100, two side plates 200, and a protruding member 310, where the two side plates 200 are respectively covered on two sides of the shroud 100, a first air outlet 210 is defined between the two side plates 200 and the shroud 100, at least one side plate 200 is formed with a first air inlet 220 as an air inlet side plate, the protruding member 310 is disposed on an outer surface of the air inlet side plate, a thickness of the protruding member 310 in an air inlet direction of an air flow passing through the first air inlet 220 is increased and then decreased along a side plate edge where the air inlet side plate is connected with the shroud 100 toward a direction of approaching the first air inlet 220, so as to guide the air flow flowing toward the first air inlet 220, so that a process of the air flow flowing toward the first air inlet 220 is more gradual, generation of separation flow of the air flow at an edge of the scroll casing is suppressed, collision of the, and the noise generated by the collision of the airflow and the volute 101 is reduced, the performance of the fan is improved, and meanwhile, the bulge 310 is simple in structure, small in occupied space and easy to prepare.
In this embodiment, protruding member 310 and side plate 200 may be integrally formed, so that the overall structure of volute 101 is more stable, and the service life of volute 101 is prolonged.
In other embodiments, the protruding member 310 may also be fixedly disposed on the side plate 200, for example, by being adhered or welded, so that the generation of the separated flow of the airflow at the edge of the volute can be suppressed without changing the original structure of the volute 101, the preparation process of the volute 101 is simplified, and the cost is saved.
In other embodiments, the protruding member 310 may also be detachably fixed on the side plate 200, for example, by a snap connection, a screw fixation, and the like, so that the protruding member 310 may be applied to multiple matching volutes 101, and the applicability is wider.
In this embodiment, the protruding member 310 may be a solid body, which enables the structure of the volute 101 to be more stable, and the protruding member 310 is not easily deformed, so as to prolong the service life thereof.
In other embodiments, protruding member 310 may also be a hollow body, which can reduce the overall mass of volute 101, thereby facilitating the installation of volute 101 and saving cost.
In this embodiment, the thickness of the protruding member 310 gradually increases and then gradually decreases along the side plate edge toward the first air inlet, so that the surface of the protruding member 310 is disposed in an arc shape, that is, the cross section (as shown in fig. 3) of the outer surface of the protruding member 310 along the a-a direction (shown in fig. 2) parallel to the air outlet direction of the air flow through the first air outlet 210 is disposed in an arc shape, so that the flow of the air flow passing through the protruding member 310 can be smoother, the generation of the separated flow of the air flow at the edge of the volute can be further suppressed, and the collision of the air flow to the bottom of the volute can be reduced.
In other embodiments, the cross section of the protrusion 310 along the direction a-a may also be trapezoidal, triangular or other polygonal shapes, and the effect of moderating the airflow can also be achieved, which is not limited herein.
In this embodiment, a plane where a highest point (i.e., a highest point of the thickness of the protruding member 310) of the protruding member 310 in the air inlet direction of the airflow passing through the first air inlet 220 and the axis of the first air inlet 220 are located is parallel to the air outlet direction of the airflow passing through the first air outlet 210. Specifically, the air outlet direction of the airflow through the first air outlet 210 is a direction from bottom to top as shown in fig. 2, that is, the plane where the highest point of the protruding member 310 in the air inlet direction of the airflow through the first air inlet 220 and the axis of the first air inlet 220 are located together is parallel to the up-down direction as shown in fig. 2, so that the airflow flowing through the highest point can flow into the center of the first air inlet 220, a certain rectification effect can be exerted on the airflow, the airflow can flow more smoothly, the generation of separation flow of the airflow at the edge of the volute can be further inhibited, and the collision of the airflow on the bottom of the volute is reduced.
In other embodiments, the highest point of the protrusion 310 in the air inlet direction of the air flow passing through the first air inlet 220 may be disposed close to the first center point, for example, the distance between the highest point of the protrusion 310 in the air inlet direction of the air flow passing through the first air inlet 220 and the first center point is less than or equal to 2mm, so that the air flow can be smoother.
In this embodiment, the highest point of the protruding part 310 in the air inlet direction of the air flow passing through the first air inlet 220 is located between the first edge of the protruding part 310, which is far away from the first air inlet 220, and the second edge of the protruding part 310, which is close to the first air inlet 220, so that the shape of the protruding part 310 is more regular, the flow guiding effect on the air flow is better, the flow of the air flow is smoother, the generation of the separation flow of the air flow at the edge of the volute can be further inhibited, and the collision of the air flow on the bottom of the volute is reduced.
Defining the point of the protrusion 310 located between the first edge and the second edge of the protrusion 310 in this embodiment as the second center point, in other embodiments, the highest point of the protrusion 310 in the air intake direction of the airflow passing through the first air inlet 220 may also be located near the second center point, for example, the distance between the highest point and the second center point of the protrusion 310 in the air intake direction of the airflow passing through the first air inlet 220 is less than or equal to 2mm, which can make the airflow flow smoother.
In this embodiment, the protruding member 310 entirely covers the outer surface of the air inlet side plate, and the protruding member 310 only covers a main portion of the airflow flowing to the first air inlet 220, so that the structure of the protruding member 310 is simpler, the occupied space is smaller, and the preparation of the scroll casing 101 is facilitated while the generation of the separated flow of the airflow at the edge of the scroll casing is suppressed.
In the present embodiment, a first edge of the protrusion 310 away from the first air inlet 220 is tangent to the outer surface of the shroud 100, and a second edge of the protrusion 310 close to the first air inlet 220 is tangent to the opening edge of the first air inlet 220, so that the flow of the airflow passing through the protrusion 310 can be smoother, the generation of the separated flow of the airflow at the edge of the volute can be further suppressed, and the collision of the airflow on the bottom of the volute can be reduced.
In other embodiments, the protrusion 310 may have only one edge tangent to the structure to which it is connected, that is, a first edge of the protrusion 310 away from the first air inlet 220 is tangent to the outer surface of the enclosure 100, or a second edge of the protrusion 310 close to the first air inlet 220 is tangent to the opening edge of the first air inlet 220, which is not limited herein.
In this embodiment, the projected portion of the first edge in the air inlet direction of the airflow passing through the first air inlet 220 coincides with the outer surface of the shroud 100, and the projected portion of the second edge in the air inlet direction of the airflow passing through the first air inlet 220 coincides with the opening edge of the first air inlet 220, so that the shape of the protrusion 310 and the shape of the side plate 200 are more fitted, the flow of the airflow passing through the protrusion 310 is smoother, the generation of separated flow of the airflow at the edge of the scroll casing can be further suppressed, and the collision of the airflow against the bottom of the scroll casing is reduced.
In other embodiments, the projection of the protrusion 310 may only have one edge overlapping the structure connected to the first air inlet 220 in the air inlet direction of the airflow passing through the first air inlet 220, that is, the projection of the first edge overlapping the outer surface of the enclosure 100 in the air inlet direction of the airflow passing through the first air inlet 220, or the projection of the second edge overlapping the opening edge of the first air inlet 220 in the air inlet direction of the airflow passing through the first air inlet 220, which is not limited herein.
In this embodiment, a connecting portion of a first edge of the protrusion 310 away from the first air inlet 220 and the outer surface of the shroud 100 forms a fillet, and a radius corresponding to the fillet is 1/5 to 3/10 of the thickness of the shroud 100 in the air inlet direction of the air flow through the first air inlet 220, for example, 1/5, 1/4 or 3/10, so that the connecting portion of the first edge and the outer surface of the shroud 100 can be smoother, the flow of the air flow through the protrusion 310 can be smoother, the generation of the separated flow of the air flow at the edge of the volute can be further inhibited, and the collision of the air flow to the bottom of the volute can be reduced.
In this embodiment, a first edge of the protrusion 310 away from the first air inlet 220 is a curve, and a second edge of the protrusion 310 close to the first air inlet 220 is a curve, so that a projection of the protrusion 310 in an air inlet direction of the air flow passing through the first air inlet 220 is crescent-shaped, and the protrusion has a simple structure, smooth edges, and a small occupied space.
Referring to fig. 4, in another embodiment, the volute 101 further includes a rectifying plate 311 and a vortex generator 312, the rectifying plate 311 is disposed on the protruding member 310, an extending direction of the rectifying plate 311 is parallel to an air outlet direction of the air flow passing through the first air outlet 210, and the air flow passing through the protruding member 310 can be rectified, so that the flow of the air flow is smoother, the generation of the separated flow of the air flow at the edge of the volute is further suppressed, and the collision of the air flow against the bottom of the volute is reduced, and the vortex generator 312 is disposed on the protruding member 310, and the generation of the separated flow of the air flow at the edge of the volute can be further slowed down, and the collision of the air flow against the bottom.
In this embodiment, the number of the rectifying plates 311 is one, and the rectifying plates are disposed in the middle of the protruding member 310, so that the main portion of the airflow flowing to the first air inlet 220 can be rectified, and a good rectifying effect is achieved.
In other embodiments, the number of the rectifying plates 311 may also be multiple, and the multiple rectifying plates are arranged at intervals along the vertical direction of the air inlet direction of the airflow passing through the first air inlet 220 and the vertical direction of the air outlet direction of the airflow passing through the first air outlet 210 (i.e., the left-right direction shown in fig. 2), so as to rectify more airflows flowing to the first air inlet 220, and further improve the rectification effect.
In this embodiment, the number of the vortex generators 312 is plural, the plurality of vortex generators 312 are arranged at intervals along the vertical direction of the air inlet direction of the air flow passing through the first air inlet 220 and the vertical direction of the air outlet direction of the air flow passing through the first air outlet 210, and are respectively arranged at two sides of the rectifying plate 311, and the number of the vortex generators 312 located at two sides of the rectifying plate 311 is similar, for example, the difference is less than or equal to 2, so that the vortex generators 312 can be matched with the rectifying plate 311 to achieve a better air flow effect.
In other embodiments, the number of the vortex generators 312 may be one, and is not limited herein.
In this embodiment, the vortex generator 312 may be wedge-shaped, which can provide a better airflow effect.
In other embodiments, the vortex generator 312 may have other shapes such as an airfoil shape or a concave shape, and is not limited herein.
In other embodiments, volute 101 may include only one of fairing 311 and vortex generator 312, which is not limited herein.
Referring to fig. 5, another embodiment of the volute 101 of the present invention includes a shroud 100, two side plates 200 and a protrusion 320, wherein the structures of the shroud 100 and the two side plates 200 are similar to the structures of the shroud 100 and the two side plates 200 in the above-mentioned embodiment of the volute 101, and are not described again here.
The difference between this embodiment and the above-mentioned embodiment is that in this embodiment, both the first edge of the protruding member 320 far from the first air inlet 220 and the second edge close to the first air inlet 220 are curved lines, so that the projection of the protruding member 320 in the air inlet direction of the air flowing through the first air inlet 220 is in a C shape, meanwhile, the projection of the first edge in the air inlet direction of the air flowing through the first air inlet 220 completely coincides with the outer surface of the enclosure 100, and the projection of the second edge in the air inlet direction of the air flowing through the first air inlet 220 completely coincides with the opening edge of the first air inlet 220, so that the coverage of the protruding member 320 is larger, and can act on more air flowing through the protruding member 320, and the shapes of the protruding member 320 and the side plate 200 are more matched, so that the flow of the air flowing through the protruding member 320 is smoother, and the generation of the separated flow of the air flow at the edge of the volute can be further suppressed, and the collision of the airflow to the bottom of the volute is reduced.
In other embodiments, the projection of only one edge of the protrusion 320 in the air inlet direction of the air flowing through the first air inlet 220 may completely overlap with the structure connected thereto, that is, the projection of the first edge in the air inlet direction of the air flowing through the first air inlet 220 completely overlaps with the outer surface of the enclosure 100, or the projection of the second edge in the air inlet direction of the air flowing through the first air inlet 220 completely overlaps with the opening edge of the first air inlet 220, which is not limited herein.
In other embodiments, the protrusion 320 may also have a structure in which a projection of one edge in the air inlet direction of the air flow passing through the first air inlet 220 completely overlaps with the structure connected thereto, and a projection of the other edge in the air inlet direction of the air flow passing through the first air inlet 220 overlaps with the structure connected thereto, which is not limited herein.
Referring to fig. 6, another embodiment of the volute 101 of the present invention includes a shroud 100, two side plates 200 and a protruding member 330, wherein the structures of the shroud 100 and the two side plates 200 are similar to the structures of the shroud 100 and the two side plates 200 in the above-mentioned embodiment of the volute 101, and are not described again here.
The difference between this embodiment and the above embodiment is that in this embodiment, both the first edge of the protruding member 330 away from the first air inlet 220 and the second edge close to the first air inlet 220 are curved, so that the projection of the protruding member 330 in the air inlet direction of the airflow passing through the first air inlet 220 is spiral, meanwhile, the projection of the first edge in the air inlet direction of the airflow passing through the first air inlet 220 completely coincides with the outer surface of the enclosure 100, and the projection of the second edge in the air inlet direction of the airflow passing through the first air inlet 220 completely coincides with the opening edge of the first air inlet 220, so that the protruding member 330 can act on all the airflow passing through the protruding member 330, and the shape of the protruding member 330 and the side plate 200 are more fitted, so that the flow of the airflow passing through the protruding member 330 is smoother, and the generation of the separated flow of the airflow at the edge of the volute can be further suppressed, and the collision of the airflow to the bottom of the volute is reduced.
In this embodiment, the protrusion 330 may be directly formed by the side plate 200, or may be fixedly disposed on the side plate 200, and the protrusion 330 completely covers the surface of the intake side plate away from the enclosing plate 100.
In other embodiments, the projection of the protruding member on the air inlet direction of the air flowing through the first air inlet 220 may also be circular, and may also act on all the air flowing through the protruding member 330.
Referring to fig. 7, another embodiment of the volute 101 of the present invention includes a shroud 100, two side plates 200 and a protrusion 340, wherein the structures of the shroud 100 and the two side plates 200 are similar to the structures of the shroud 100 and the two side plates 200 in the above-mentioned embodiment of the volute 101, and are not described again here.
The difference between the present embodiment and the above embodiments is that in the present embodiment, a first edge of the protrusion 340 away from the first air inlet 220 and a second edge close to the first air inlet 220 are both straight lines, so that a projection of the protrusion 340 in an air inlet direction of the air flow passing through the first air inlet 220 is rectangular, the protrusion 340 partially covers a surface of the air inlet side plate away from the shroud plate 100, and all the air flows flowing from the bottom of the scroll casing 101 to the first air inlet 220 can be acted, so that the flow of the air flow passing through the protrusion 340 is smoother, and thus the generation of the separated flow of the air flow at the edge of the scroll casing can be further suppressed, and the collision of the air flow to the bottom of the scroll casing can be reduced.
The volute side plate embodiment of the invention is an air inlet side plate of the volute, wherein the structure of the air inlet side plate refers to the air inlet side plate in the volute embodiment, and the details are not repeated herein. Through set up protruding piece on the air inlet curb plate, carry out the water conservancy diversion to the air current of the first air intake of air inlet curb plate for the process of air current flow direction first air intake is more alleviated, restrain the production that the separation of the air current at spiral case edge flows, reduce the collision of air current to the spiral case bottom, thereby reduce the resistance that the air current flows the in-process and receive, and reduce the noise that air current and spiral case collision produced, be favorable to improving the performance of fan, protruding simple structure of piece simultaneously, occupation space is less, easily preparation.
Referring to fig. 1 to 3, the fan 10 of the present invention includes a volute 101, a driver 102 disposed in the volute 101, and an impeller (not shown in the drawings), wherein the driver 102 is connected to the impeller and is configured to drive the impeller to rotate so as to generate an air flow, and the air flow enters the volute 101 from a first air inlet 220 and is discharged from a first air outlet 210. The structure of volute 101 is as described above with reference to the volute embodiments, and is not described herein again.
In the embodiment of the invention, the protruding piece 310 is arranged on the air inlet side plate of the volute 101 to guide the airflow flowing to the first air inlet 220 of the air inlet side plate, so that the process of the airflow flowing to the first air inlet 220 is more moderate, the generation of the separated flow of the airflow at the edge of the volute is inhibited, and the collision of the airflow to the bottom of the volute is reduced, thereby reducing the resistance received in the airflow flowing process, reducing the noise generated by the collision of the airflow and the volute 101, and being beneficial to improving the performance of the fan, and meanwhile, the protruding piece 310 has a simple structure, occupies a smaller space and is easy to prepare.
Referring to fig. 8 and 9, an embodiment of a cigarette machine according to the present invention includes a housing 20 and a blower 10, the blower 10 is disposed in the housing 20, wherein the blower 10 has a structure that is referred to the blower embodiment, and will not be described herein again, the housing 20 is formed with a second air inlet 201 and a second air outlet 202, the second air inlet 201 is communicated with a first air inlet 220 of a scroll 101, the second air outlet 202 is communicated with a first air outlet 210 of the scroll 101, so that an air flow generated by an impeller driven by a driver 102 can enter the housing 20 through the second air inlet 201, and enter the scroll 101 from the first air inlet 220 after passing through a protruding member 310 of the scroll 101, and sequentially flow out through the first air outlet 210 and the second air outlet 202, and the air flow flowing to the first air inlet 220 of the air inlet side plate is guided by providing the protruding member 310 on the air inlet side plate of the scroll 101, so that a process of the air flow, the generation of the separated flow of the airflow at the edge of the volute is inhibited, and the collision of the airflow to the bottom of the volute is reduced, so that the resistance applied to the airflow in the flowing process is reduced, the noise generated by the collision of the airflow and the volute 101 is reduced, the performance of the fan is improved, and meanwhile, the bulge piece 310 is simple in structure, small in occupied space and easy to prepare.
In the present embodiment, the two side plates 200 of the scroll casing 101 are each provided with the protruding member 310, and one of the side plates 200 is disposed close to the second air inlet 201, and the other side plate 200 is disposed away from the second air inlet 201, wherein a ratio of a thickness H1 of the protruding member 310 on one side plate 200 in an air inlet direction of the air flow passing through the first air inlet 220 to a distance D1 between one side plate 200 and the casing 20 is 1/4 to 1/3, such as 1/4, 7/25 or 1/3, and a ratio of a thickness H2 of the protruding member 310 on the other side plate 200 in the air inlet direction of the air flow passing through the first air inlet 220 to a distance D2 between the other side plate 200 and the casing 20 is 9/20 to 11/20, such as 9/20, 1/2 or 11/20, and the like, so that the air flow can flow more smoothly from between the protruding member 310 and the casing 20 to the, thereby reducing the resistance in the air flow flowing process and being beneficial to improving the performance of the cigarette machine.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims (16)

1. A spiral casing, comprising:
enclosing plates;
the two side plates are respectively covered on two sides of the enclosing plate, a first air outlet is defined between the two side plates and the enclosing plate, and a first air inlet is formed in at least one side plate to serve as an air inlet side plate;
protruding piece, protruding piece set up in the surface of air inlet curb plate, protruding piece is in the air current warp ascending thickness in the air inlet direction of first air intake along the air inlet curb plate with curb plate edge that the bounding wall is connected to the direction of being close to of first air intake increases earlier then reduces to be used for the counter flow direction the air current of first air intake carries out the water conservancy diversion.
2. The spiral casing of claim 1 wherein the surface of the projection is cambered.
3. The spiral casing of claim 1 wherein a plane where a highest point of the protruding member in an air inlet direction of the airflow passing through the first air inlet and an axis of the first air inlet are located is parallel to an air outlet direction of the airflow passing through the first air outlet.
4. The spiral casing of claim 1 wherein the projection entirely or partially covers the outer surface of the inlet side plate.
5. The spiral casing of claim 1 wherein a first edge of the projection distal from the first inlet opening is tangent to an outer surface of the shroud, and/or a second edge of the projection proximal to the first inlet opening is tangent to an opening edge of the first inlet opening.
6. The spiral casing of claim 5 wherein at least a portion of a projection of the first edge in an air inlet direction of the airflow through the first air inlet opening coincides with an outer surface of the shroud, and/or at least a portion of a projection of the second edge in an air inlet direction of the airflow through the first air inlet opening coincides with an opening edge of the first air inlet opening.
7. The spiral casing of claim 1 wherein a first edge of the protruding member away from the first air inlet is tangent to the outer surface of the shroud, and a junction between the first edge of the protruding member away from the first air inlet and the outer surface of the shroud forms a fillet with a radius of 1/5-3/10 of a thickness of the shroud in an air inlet direction of the air flowing through the first air inlet.
8. The spiral casing of claim 1 wherein a first edge of the projection away from the first inlet opening is curved or straight and/or a second edge of the projection closer to the first inlet opening is curved or straight.
9. The volute of claim 8, wherein the first edge and the second edge are both curved, and a projection of the protruding member in an air inlet direction of the airflow passing through the first air inlet is crescent-shaped, C-shaped, circular or spiral; alternatively, the first and second electrodes may be,
the first edge and the second edge are straight lines, and the projection of the protruding part on the air inlet direction of the first air inlet is rectangular.
10. The volute of claim 1, further comprising at least one of:
the rectifying plate is arranged on the protruding part, and the extending direction of the rectifying plate is parallel to the air outlet direction of the air flow passing through the first air outlet;
a vortex generator disposed on the boss.
11. The spiral casing of claim 10 wherein the vortex generator is wedge-shaped.
12. The spiral casing of claim 10 wherein the vortex generators are airfoil shaped.
13. The spiral casing of claim 10 wherein the vortex generator is concave.
14. A blower comprising a volute according to any one of claims 1 to 13, a driver disposed in the volute, and an impeller, wherein the driver is connected to the impeller and is configured to drive the impeller to rotate so as to generate an airflow, and the airflow enters the volute from the first air inlet and exits from the first air outlet.
15. A range hood, comprising a housing and the blower of claim 14, wherein the blower is disposed in the housing, the housing is formed with a second air inlet and a second air outlet, the second air inlet is communicated with the first air inlet of the volute, and the second air outlet is communicated with the first air outlet of the volute, so that the driver drives the impeller to generate an air flow which can enter the housing through the second air inlet, and pass through the protruding member of the volute, then enter the volute from the first air inlet, and sequentially pass through the first air outlet and the second air outlet.
16. A machine as claimed in claim 15, wherein both side plates of said volute are provided with said raised members, and one of said side plates is disposed adjacent said second air inlet and the other side plate is disposed remote from said second air inlet.
CN202011615769.6A 2020-12-30 2020-12-30 Spiral case, fan and cigarette machine Active CN112833048B (en)

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JPH0882299A (en) * 1994-09-14 1996-03-26 Daikin Ind Ltd Multiple-blade blower
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CN114857053B (en) * 2022-05-30 2024-02-27 杭州老板电器股份有限公司 Volute, multi-wing centrifugal fan and range hood

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