CN212673373U - Air duct type indoor unit - Google Patents
Air duct type indoor unit Download PDFInfo
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- CN212673373U CN212673373U CN202021416158.4U CN202021416158U CN212673373U CN 212673373 U CN212673373 U CN 212673373U CN 202021416158 U CN202021416158 U CN 202021416158U CN 212673373 U CN212673373 U CN 212673373U
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Abstract
The utility model discloses an air duct type indoor unit, include: a housing having an accommodating space formed therein; the volute is provided with an air inlet and is arranged in the accommodating space; the centrifugal fan is arranged in the volute and used for sucking airflow from the air inlet into the volute; annular mass flow piece establishes the air intake department of spiral case, it is including the windward side, still including: the plurality of lug bosses are formed on the windward side and are arranged along the circumferential direction of the annular current collecting piece; and a plurality of concave parts which are alternately formed on the windward side of the annular current collecting piece with the convex parts and are used for matching with the convex parts to change the airflow direction so as to deviate the airflow from the axial direction of the annular current collecting piece. Through the utility model provides a big problem of noise that prior art wind tubular indoor set exists.
Description
Technical Field
The utility model relates to the technical field of household appliances, especially, relate to an improvement of tuber pipe formula indoor set structure.
Background
The fan coil is an ideal end product of a central air conditioner, and is widely applied to hotels, office buildings, hospitals, business and residential institutions and scientific research institutions. The fan cools or heats indoor air or outdoor mixed air through the surface air cooler and then sends the air into the room, so that the indoor temperature is lowered or raised, and the comfort requirement of people is met.
The existing air duct type indoor unit structure is mostly provided with a centrifugal fan, a volute is arranged outside the centrifugal fan, an air inlet is arranged on the volute, a current collector is usually arranged in the area of the air inlet to guide the air flow so as to accelerate the air flow in the area, and an even speed field and a pressure field are formed at the air inlet so as to reduce the flow loss and improve the efficiency of the fan. The collector serves as an important auxiliary component of the centrifugal fan, and the structure of the collector not only influences the pneumatic performance of the centrifugal fan, but also influences the noise characteristics. Four types of common forms are currently used, namely, cylindrical, conical, circular arc and nozzle shapes, and the cross section is circular. The flow surfaces of these four types of collectors are often smooth, the purpose of which is to create a uniform flow in this area, the main purpose of the collector being to guide the external air flow into the fan. Because the collector guides the airflow into the fan along the axial direction, the airflow entering from the outside enters the fan along the axial direction, the airflow flow is large, the impact on the fan is large, and the noise of the fan is large.
SUMMERY OF THE UTILITY MODEL
For solving the big problem of noise that prior art wind tubular indoor set exists, the utility model provides a wind tubular indoor set sets up bellying and depressed part cooperation on annular mass flow piece to make the axial direction of air current flow direction deflection annular mass flow piece, make the air current flow that directly enters into the axial direction in the spiral case behind annular mass flow piece diminish, reduced the impact to the fan, and then reduced the noise of whole wind tubular indoor set.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides an air duct type indoor unit, include: a housing having an accommodating space formed therein;
the volute is provided with an air inlet and is arranged in the accommodating space;
the centrifugal fan is arranged in the volute and used for sucking airflow from the air inlet into the volute;
annular mass flow piece establishes the air intake department of spiral case, it is including the windward side, still including:
the plurality of lug bosses are formed on the windward side and are arranged along the circumferential direction of the annular current collecting piece;
and a plurality of concave parts which are alternately formed on the windward side of the annular current collecting piece with the convex parts and are used for matching with the convex parts to change the airflow direction so as to deviate the airflow from the axial direction of the annular current collecting piece.
In some embodiments of the present application: the convex part top surface is smooth first curved surface, the depressed part bottom surface is smooth second curved surface, smooth transition connects between depressed part and the convex part.
In some embodiments of the present application: the first curved surface and the second curved surface are both arc-shaped surfaces, and the curvature radiuses corresponding to the first arc-shaped surface and the second arc-shaped surface are the same or different.
In some embodiments of the present application: the annular current collector comprises:
the assembling section is used for assembling with the volute;
and the flow guide section is connected with the assembly section, an airflow inlet end and an airflow outlet end are arranged on the flow guide section, and the cross-sectional area of the flow guide section gradually decreases along the direction from the airflow inlet end to the airflow outlet end.
In some embodiments of the present application: the boss is axially disposed along the annular flow-focusing sleeve and extends from the airflow inlet end to the airflow outlet end.
In some embodiments of the present application: the distance between the convex part and the windward surface is the height A of the convex part, the height of the convex part is 2-6% of the minimum diameter of the flow guide section, the distance between the concave part and the windward surface is the height B of the concave part, and the height of the concave part is 2-6% of the minimum diameter of the flow guide section.
In some embodiments of the present application: the distance between the two side walls of the protruding portion is the width L of the protruding portion, and the A/L ratio is 0.1-0.5.
In some embodiments of the present application: the protruding portion is formed by protruding from the windward side to the inner side of the annular current collecting piece, and the recessed portion is formed by recessed from the windward side to the outer side of the annular current collecting piece.
In some embodiments of the present application: the plurality of convex parts or/and the plurality of concave parts are obliquely arranged towards the windward side and have consistent oblique directions.
In some embodiments of the present application: the plurality of convex parts or/and the concave parts are spirally arranged on the windward side, and the spiral direction of the convex parts or/and the concave parts is the same as the spiral direction of the centrifugal fan blades.
The technical scheme of the utility model prior art relatively has following technological effect:
the utility model provides a tuber pipe formula indoor set, what correspond on the windward side of annular mass flow piece is provided with depressed part and bellying, when the windward side of annular mass flow piece was crossed in the air current, can flow through on bellying and the depressed part, the effect of blockking through bellying and depressed part makes the flow direction of the partial air current of flow through depressed part and bellying take place to deflect, the axis direction of skew annular mass flow piece, the air current flow who gets into along axial direction has been reduced, the impact to the well dish of fan has been reduced, the noise has been reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an overall structure diagram of an air duct type indoor unit in the embodiment of the present invention;
fig. 2 is a first schematic structural diagram of a volute of an air duct type indoor unit according to an embodiment of the present invention;
fig. 3 is a second schematic structural view of a volute of the duct type indoor unit according to the embodiment of the present invention;
fig. 4 is a first schematic structural view of a ring-shaped flow collecting member of an air duct type indoor unit according to an embodiment of the present invention;
fig. 5 is a second schematic structural view of the annular flow collecting member of the duct type indoor unit according to the embodiment of the present invention;
fig. 6 is a front view of the volute of the air duct type indoor unit in the embodiment of the present invention;
fig. 7 is a partially enlarged view of a portion a of fig. 6.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art. In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The terms "first", "second" and "first" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
The utility model provides an embodiment of an air duct type indoor unit, which is shown in fig. 1-7 and comprises a casing 100, wherein a volute 200 is arranged inside the casing 100 and is provided with an air inlet 210 and a centrifugal fan 300 which is arranged in the volute 200; when the air duct type indoor unit is in operation, the centrifugal fan 300 can rotate, and the air flow is sucked into the scroll casing 200 through the air inlet 210 on the scroll casing 200.
The annular collecting member 400 is disposed at the air inlet 210 of the volute 200, and includes a windward side 410, and further includes:
a plurality of protrusions 420 formed on the windward surface 410 and arranged along the circumferential direction of the ring-shaped collector 400;
and a plurality of recesses 430 formed alternately with the protrusions 420 on the windward side 410 of the ring-shaped collector 400, for cooperating with the protrusions 420 to change the direction of the airflow to deviate from the axial direction of the ring-shaped collector 400.
Preferably, the protrusion 420 and the recess 430 in this embodiment are directly and integrally formed with the ring-shaped current collector 400.
In the embodiment, the protruding portion 420 and the recessed portion 430 are correspondingly arranged on the windward side 410 of the ring-shaped current collector 400, when the airflow is sucked by the fan located inside the volute 200, the airflow is guided by the ring-shaped current collector 400, when the airflow passes through the ring-shaped current collector 400, part of the airflow is blocked and deflected by the protruding portion 420 when the airflow passes through the protruding portion 420 on the ring-shaped current collector 400, and meanwhile, the corresponding part of the airflow contacts the recessed portion 430 when the airflow passes through the recessed portion 430, and is deflected by the blocking effect of the wall surface of the recessed portion 430; part of the airflow enters the concave portion 430 after the deflection of the convex portion 420, is blocked by the concave portion 430 and further deflects, then enters the convex portion 420 and then enters the concave portion 430. The impact force of the airflow on the middle disc of the fan is reduced, and further the overall noise value is reduced.
In some embodiments of the present application: the top surface of the convex part 420 is a smooth first curved surface, the bottom surface of the concave part 430 is a smooth second curved surface, and the concave part 430 and the convex part 420 are connected in a smooth transition way. The contour line corresponding to the first curved surface can be formed by smoothly connecting multiple sections of curves or formed by a single smoothly-transitional curve.
Correspondingly, the contour line corresponding to the second curved surface may also be formed by smoothly connecting multiple curved lines, or may be formed by a single curved line, which is not limited herein.
The convex part 420 and the concave part 430 are both smooth curved surfaces, so that the airflow is smooth when passing through, and the noise generated by the impact of the airflow with the convex part 420 and the concave part 430 is further reduced.
In some embodiments of the present application: the first curved surface and the second curved surface are respectively a first arc-shaped surface and a second arc-shaped surface, and the corresponding curvature radiuses of the first arc-shaped surface and the second arc-shaped surface are the same or different.
That is, the first arc-shaped surface and the second arc-shaped surface in this embodiment may be arc-shaped surfaces having the same curvature radius, or arc-shaped surfaces not having the same curved radius, as long as the first arc-shaped surface and the second arc-shaped surface are connected in a smooth transition manner, so that the noise generated by the air flow when flowing can be reduced by the smooth flow of the air flow passing through the first arc-shaped surface and the second arc-shaped surface.
Preferably, the first arc surface and the second arc surface in this embodiment may be sine curves or cosine curves.
In some embodiments of the present application: the ring-shaped manifold 400 includes:
a mounting segment 440 for mounting with said volute 200, the mounting segment 440 preferably being annular;
the flow guiding section 450 is smoothly connected with the assembling section 440, preferably, the flow guiding section 450 is tapered, an airflow inlet end 451 and an airflow outlet end 452 are arranged on the flow guiding section 450, the cross-sectional area of the flow guiding section 450 gradually decreases from the airflow inlet end 451 to the airflow outlet end 452, the inner diameter of the flow guiding section 450 gradually decreases from the airflow inlet section to the airflow outlet section, the outer inner diameter of the flow guiding section 450 is large, so that almost all the wind sucked by the centrifugal fan 300 can be sucked into the scroll casing 200, and the corresponding inner diameter gradually decreases near the centrifugal fan 300, and is mainly used for guiding the airflow, so that almost all the sucked airflow is conveyed to the position of the centrifugal fan 300 along the axial direction of the annular collecting member 400.
In some embodiments of the present application: the boss 420 is axially disposed along the annular flow sleeve and smoothly extends from the mounting section 440 to an end position of the flow guide section 450. The transition of the protruding portion 420 from the assembling section 440 to the flow guiding section 450 enables the airflow to be blocked and dispersed and deflected in a direction deviating from the axial direction of the ring-shaped flow collecting member 400 when blowing to the assembling section 440, so that the deflected airflow flow is increased, the impact of the airflow on the center disk of the fan is further reduced, and the noise reduction effect is further enhanced.
Preferably, the distance from the protruding portion 420 to the windward side 410 is a height a of the protruding portion 420, the height of the protruding portion 420 is 2-6% of the minimum diameter of the flow guide section 450, the distance from the recessed portion 430 to the windward side 410 is a height B of the recessed portion 430, and the height of the recessed portion 430 is 2-6% of the minimum diameter of the flow guide section 450.
Preferably, the height a of the protrusion 420 is 4.5% of the minimum diameter of the flow guide section 450 of the annular flow collector 400, the height a of the protrusion 420 is 2.6mm, the distance between two side walls of the protrusion 420 is the width L of the protrusion 420, and the a/L ratio is 0.1-0.5. The protrusions 420 and the depressions 430 in the present embodiment may have a better noise reduction effect by setting the relationship between the height a of the protrusion 420 and the size of the ring-shaped current collector 400 and the relationship between them and the width of the protrusion 420.
In some embodiments of the present application: the number of the protrusions 420 is 18 to 20.
In some embodiments of the present application: the protrusion 420 is formed to protrude from the windward side 410 toward the inner side of the ring collector 400, and the recess 430 is formed to recess from the windward side 410 toward the outer side of the ring collector 400.
Preferably, a plurality of protrusions 420 and a plurality of recesses 430 are provided in the present embodiment, and when the protrusions 420 are disposed, the protrusions 420 may be disposed in an inclined manner toward the windward side 410, and the inclined directions of the protrusions are consistent, so as to change the flow direction of the airflow to deviate from the axial direction, and reduce the airflow entering from the axial direction. The concave portion 430 is disposed toward the windward side 410, or both the convex portion 420 and the concave portion 430 are disposed obliquely toward the windward side 410, so as to change the direction of the airflow.
Preferably, the plurality of protrusions 420 and/or the plurality of recesses 430 in the present embodiment are spirally arranged on the windward side 410, which can ensure that the airflow can deflect when passing through the protrusions 420 and/or the recesses 430, and because the spiral arrangement direction of the protrusions is the same as the spiral arrangement direction of the blades of the centrifugal fan 300, the airflow can be directly sucked into the centrifugal fan 300 through the blades on the periphery of the central disk of the centrifugal fan 300 after being deflected, thereby reducing the airflow flow entering from the axial direction, reducing the impact on the central disk of the centrifugal fan 300, and reducing the noise.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (10)
1. An air duct type indoor unit, comprising: a housing having an accommodating space formed therein;
the volute is provided with an air inlet and is arranged in the accommodating space;
the centrifugal fan is arranged in the volute and used for sucking airflow from the air inlet into the volute;
annular mass flow piece establishes the air intake department of spiral case, it is including the windward side, its characterized in that still including:
the plurality of lug bosses are formed on the windward side and are arranged along the circumferential direction of the annular current collecting piece;
and a plurality of concave parts which are alternately formed on the windward side of the annular current collecting piece with the convex parts and are used for matching with the convex parts to change the airflow direction so as to deviate the airflow from the axial direction of the annular current collecting piece.
2. The air duct type indoor unit according to claim 1, wherein: the convex part top surface is smooth first curved surface, the depressed part bottom surface is smooth second curved surface, the depressed part with smooth transition connects between the convex part.
3. The air duct type indoor unit according to claim 2, wherein: the first curved surface and the second curved surface are respectively a first arc-shaped surface and a second arc-shaped surface, and the corresponding curvature radiuses of the first arc-shaped surface and the second arc-shaped surface are the same or different.
4. The air duct type indoor unit according to claim 1, wherein: the annular current collector comprises:
the assembling section is used for assembling with the volute;
and the flow guide section is connected with the assembly section, an airflow inlet end and an airflow outlet end are arranged on the flow guide section, and the cross-sectional area of the flow guide section gradually decreases along the direction from the airflow inlet end to the airflow outlet end.
5. The air duct type indoor unit of claim 4, wherein the protrusion is axially disposed along the ring-shaped manifold and smoothly extends from the assembling section to a distal end of the guide section.
6. The air duct type indoor unit of claim 5, wherein the distance between the protrusion and the windward surface is a height A of the protrusion, the height of the protrusion is 2-6% of the minimum diameter of the guide section, the distance between the recess and the windward surface is a height B of the recess, and the height of the recess is 2-6% of the minimum diameter of the guide section.
7. The air duct type indoor unit of claim 6, wherein the distance between the two side walls of the protrusion is the width L of the protrusion, and the A/L ratio is 0.1-0.5.
8. The air duct type indoor unit according to claim 5, wherein the protrusion is formed to protrude from an inner side of the windward side toward the ring-shaped flow collecting member, and the recess is formed to be recessed from an outer side of the windward side toward the ring-shaped flow collecting member.
9. The air duct type indoor unit according to claim 5, wherein the plurality of projections and/or the plurality of recesses are provided to be inclined toward the windward side in a uniform direction.
10. The air duct type indoor unit according to claim 1, wherein a plurality of protrusions and/or recesses are provided in a spiral arrangement on the windward side, and the spiral direction thereof is the same as the spiral direction of the centrifugal fan blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021416158.4U CN212673373U (en) | 2020-07-17 | 2020-07-17 | Air duct type indoor unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021416158.4U CN212673373U (en) | 2020-07-17 | 2020-07-17 | Air duct type indoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212673373U true CN212673373U (en) | 2021-03-09 |
Family
ID=74815745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021416158.4U Active CN212673373U (en) | 2020-07-17 | 2020-07-17 | Air duct type indoor unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212673373U (en) |
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2020
- 2020-07-17 CN CN202021416158.4U patent/CN212673373U/en active Active
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