CN213089943U - Indoor unit of air conditioner - Google Patents
Indoor unit of air conditioner Download PDFInfo
- Publication number
- CN213089943U CN213089943U CN202021940912.4U CN202021940912U CN213089943U CN 213089943 U CN213089943 U CN 213089943U CN 202021940912 U CN202021940912 U CN 202021940912U CN 213089943 U CN213089943 U CN 213089943U
- Authority
- CN
- China
- Prior art keywords
- profile
- blade
- air conditioner
- indoor unit
- arc
- 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.)
- Active
Links
Images
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The utility model provides an indoor unit of air conditioner, include: the centrifugal fan comprises a volute and an impeller, the impeller comprises a wheel disc and a plurality of blades, the blades are arranged at intervals along the circumferential direction of the wheel disc, the blades comprise a blade front edge, a pressure surface, a blade rear edge and a suction surface which are sequentially connected end to end, the molded lines of the blades comprise front edge molded lines, pressure surface molded lines, rear edge molded lines and suction surface molded lines which are sequentially connected end to end, grooves are arranged on the front edge of each blade, the length direction of each groove is parallel to or forms an acute angle with the length direction of each blade, and/or bulges are arranged on the front portions of at least one of the pressure surface and the suction surface, so that the airflow flowing through the front portions of the blades is disturbed, the turning process of the airflow near the blades is advanced, the laminar boundary layer structure of the surfaces of the blades is damaged, further, the vortexes at the middle and rear portions of the blades are reduced, the shape, and the efficiency of the fan is improved, and the power of the motor is reduced.
Description
Technical Field
The utility model belongs to the technical field of the air conditioner, especially, relate to an indoor unit of air conditioner.
Background
When the impeller of the centrifugal fan of the air conditioner rotates, airflow is sucked into the impeller from the volute and flows into the blade channel through the front edge of the blade, the front edge of the blade is smooth, the airflow directly impacts the front edge to cause large flow loss, a thick laminar boundary layer is formed on the surface of the blade when the airflow flows through the front edge of the blade, the boundary layer is gradually thickened along the advancing direction of the airflow, a large number of low-speed vortex regions are formed at the middle rear part of the blade, the vortex regions cause overlarge shape resistance in the motion process of the blade, the low-speed regions near the surface of the blade are too many, airflow flows unsmoothly, the flow of the fan is reduced, and the efficiency.
SUMMERY OF THE UTILITY MODEL
The present invention aims at solving at least one of the technical problems in the related art to a certain extent. For this purpose,
according to an embodiment of the present disclosure, there is provided an air conditioner indoor unit including:
the air conditioner comprises a shell, an air inlet and an air outlet are formed in the shell, and the air inlet is communicated with the air outlet to form an air duct;
the heat exchanger is arranged in the air duct and used for exchanging heat with indoor air;
centrifugal fan locates in the wind channel, centrifugal fan includes spiral case and impeller, the impeller is located in the spiral case, the impeller includes rim plate and a plurality of blade, and is a plurality of the blade is followed rim plate circumference interval sets up, the blade includes blade leading edge, pressure side, blade trailing edge and the suction surface that head and the tail connected gradually, the molded lines of blade include leading edge molded lines, pressure side molded lines, trailing edge molded lines and the suction surface molded lines that head and the tail connected gradually, be equipped with the recess on the blade leading edge just the length direction of recess with the length direction of blade is parallel or sharp angle, and/or the anterior of at least one of pressure side and suction surface is equipped with the arch.
Through set up the recess on the blade leading edge, and/or set up the arch in the front portion of at least one of pressure surface and suction surface, make the anterior air current of blade of flowing through take place the disturbance, the process of transition that leads to near blade air current is advanced, the laminar flow boundary layer structure on blade surface has been destroyed, and then the swirl at rear portion in the blade has been reduced, make the shape resistance of blade obviously reduce, the flow of air current is more unobstructed, can promote the amount of wind of fan, and promote the efficiency of fan, reduce motor power.
According to an embodiment of the present disclosure, the leading edge profile includes a first camber line and a groove profile of the groove, and the first camber line is connected with the groove profile and staggered.
According to an embodiment of the present disclosure, the first arc has at least two, the first arc is a concentric circular arc having a diameter D1。
According to the embodiment of the present disclosure, the groove profile is a groove arc, and the diameter of the groove arc is D2，D2＝k*D1And k is 0.1-0.2.
According to the embodiment of the disclosure, two ends of the leading edge profile are concentric arcs, the number of the groove arcs is N, N +2 points are formed by the circle center of the groove arc and two end points of the leading edge profile, an included angle formed by a connecting line of the two end points of the leading edge profile and the circle center of the concentric arc is α, and an included angle formed by a connecting line of the two adjacent end points and the circle center of the concentric arc is β, where β is α/(N + 1).
According to the embodiment of the present disclosure, the center of the groove arc is located on the circumference where the concentric arcs are located.
According to an embodiment of the disclosure, the thickness of the blade is t, the height of the protrusion in a direction perpendicular to the surface of the blade is a, a ═ f × t, and f is 0.1-0.2.
According to the embodiment of the disclosure, when the pressure surface is provided with the protrusions, the pressure surface molded lines comprise second arc lines and the protruded molded lines, and the second arc lines are connected with the protruded molded lines and are alternately arranged.
According to the embodiment of the disclosure, when the suction surface is provided with the protrusions, the suction surface profile comprises a third arc line and the protruded protrusion profile, and the third arc line is connected with the protruded profile and is alternately arranged.
According to an embodiment of the disclosure, the pressure profile and/or the suction profile is connected with the leading edge profile by the raised profile.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an impeller according to an embodiment of the present disclosure;
FIG. 2 is a schematic structural view of a blade according to an embodiment of the present disclosure;
FIG. 3 is a schematic view of a bucket profile according to an embodiment of the present disclosure;
FIG. 4 is a partial schematic view of a bucket profile according to an embodiment of the present disclosure;
FIG. 5 is a partial schematic view of a bucket profile according to an embodiment of the present disclosure;
FIG. 6 is a schematic structural view of a blade according to an embodiment of the present disclosure;
FIG. 7 is a schematic view of a bucket profile according to an embodiment of the present disclosure;
FIG. 8 is a partial schematic view of a bucket profile according to an embodiment of the present disclosure;
FIG. 9 is a comparison of the airflow of the original vane and the vane with grooves;
FIG. 10 is a comparison of the flow of the gas stream between the original vane and the vane with the raised vane.
In the above figures: a wheel disc 1; a blade 2; a blade leading edge 21; the leading edge profile 211; first arc 2111; a pressure surface 22; the pressure face profile 221; a second arc 2211; the blade trailing edge 23; the trailing edge profile 231; a suction surface 24; suction surface profile 241; a third arc 2411; the projections 25; the convex profile 251; a recess 26; a groove profile 261; a reinforcement ring 3.
Detailed Description
The present invention is specifically described below by way of exemplary embodiments. It should be understood, however, that elements, structures and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the present application, an air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The air conditioner includes an indoor air conditioner and an outdoor air conditioner, the outdoor air conditioner is a part of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor or outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. The air conditioner is used as a heater in a heating mode when the indoor heat exchanger is used as a condenser, and as a cooler in a cooling mode when the indoor heat exchanger is used as an evaporator.
An air conditioning indoor unit according to an embodiment of the present invention is described below with reference to fig. 1 to 10, where fig. 1 is a schematic structural view of an impeller, and fig. 2 and 5 are schematic structural views of blades.
The utility model provides an indoor set of air conditioning, this indoor set of air conditioning can be for the indoor set of wall-hanging air conditioning or indoor set of vertical cabinet air conditioning or central air conditioning, and the indoor set of air conditioning includes the casing, is formed with air intake and air outlet on the casing, and the air outlet forms the heat transfer wind channel with the air intake intercommunication.
It should be noted that, when the air conditioning indoor unit is a cabinet air conditioning indoor unit, the air outlet is generally disposed on the front side, the air inlet is generally disposed on the rear side, the front side is a side facing the user, and the rear side is a side opposite to the front side.
The air-conditioning indoor unit further comprises a heat exchanger, the heat exchanger is arranged in the heat exchange air duct and used for exchanging heat with indoor air, the centrifugal fan is arranged in the heat exchange air duct and used for introducing air from the air inlet, exchanging heat through the heat exchanger and then sending the air out from the air outlet, and therefore the refrigerating and heating functions are achieved.
Referring to fig. 1-2 and 5, the centrifugal fan includes a volute and an impeller, the impeller is located in the volute, the impeller includes a wheel disc 1 and a plurality of blades 2, the plurality of blades 2 are arranged at intervals along the circumferential direction of the wheel disc, the blades 2 include a leading edge 21, a pressure surface 22, a trailing edge 23 and a suction surface 24, which are sequentially connected end to end, and correspondingly, the profile of the blade includes a leading edge profile 211 of the leading edge, a pressure surface profile 221 of the pressure surface, a trailing edge profile 231 of the trailing edge and a suction surface profile 241 of the suction surface, which are sequentially connected end to end.
The trailing edge 23 of the blade is the end of the blade close to the outer diameter of the impeller, the leading edge 21 of the blade is the other end opposite to the trailing edge of the blade, the pressure surface 22 is the surface of the blade pushing airflow, the suction surface 24 is the surface opposite to the pressure surface, the profile of the blade is the profile of a two-position section of the blade, generally, the profile of the leading edge of the blade is smooth, and the profile of the trailing edge of the blade is matched with a wheel disc.
The impeller is connected with a motor output shaft, the motor rotates to drive the impeller to rotate, when the impeller rotates, airflow is sucked into the impeller from the volute and flows into the blade channel through the front edge of the blade, and in the process that the airflow flows into the blade channel, the airflow can directly impact the front edge of the blade to cause large flow loss.
Therefore, in order to reduce the blade shape resistance and improve the air flow smoothness, in an embodiment of the present application, referring to fig. 2 to 4, a groove 26 is provided on the blade front edge 21, the groove 26 has at least one, and the groove 26 may be provided along the length direction of the blade, that is, the length direction of the groove is parallel to the length direction of the blade, or the length direction of the groove forms an acute angle with the length direction of the blade.
Referring to fig. 9, through set up the recess on the blade leading edge, can make the air current of flowing through the blade leading edge produce the disturbance, lead to the process of transition of near blade air current to advance, destroyed the laminar flow boundary layer structure on blade surface, and then reduced the swirl at rear portion in the blade, make the shape resistance of blade obviously reduce, the flow of air current is more unobstructed, can promote the amount of wind of fan, and the efficiency of promotion fan reduces motor power.
The groove 26 has a groove profile 261, and the leading edge profile 211 includes the groove profile 261 and a first camber line 2111, the first camber line 2111 and the grooveThe lines 261 are connected and staggered, the first arc 2111 has at least one, the first arc 2111 can be provided with at least two, the first arc 2111 can be a concentric arc, and the diameter of the concentric arc can be D1The groove profile 261 may be a groove arc having a diameter D2，D2＝k*D1And k is 0.1-0.2.
It should be noted that the diameters of all the groove arcs on the leading edge profile may be the same or different; the circle center of the groove arc can be positioned on the circumference of the concentric arc or not; the first arc may also be a spline curve and the groove profile may also be a spline curve.
The number of the grooves 26 may be N, and correspondingly, the number of the groove arcs 261 is N, the number of the centers of the groove arcs is N, and it may be set that two ends of the leading edge profile are concentric arcs, the center of the groove arc and two ends of the leading edge profile form N +2 points, an included angle formed by a connecting line between the two ends of the leading edge profile and the centers of the concentric arcs is α, and an included angle formed by a connecting line between two adjacent ends and the centers of the concentric arcs is β, β ═ α/(N + 1). Specifically, the number of grooves 26 may be 2-8.
In another embodiment of the present application, in order to reduce the blade shape resistance and improve the smoothness of the air flow, referring to fig. 5-8, at least one of the pressure surface and the suction surface has a protrusion 25 at the front portion, the length direction of the protrusion may be set to be parallel to or at an acute angle with the length direction of the blade, the protrusion 25 has at least one, and may be entirely disposed on the pressure surface, or entirely disposed on the suction surface, or both the pressure surface and the suction surface, and the number of the protrusions is not limited. Specifically, the number of the protrusions may be 2 to 4.
Referring to fig. 10, the front portion of the pressure surface and/or the suction surface is provided with the protrusion, the airflow generates disturbance when flowing through the protrusion, the transition process is advanced, the laminar boundary layer on the surface of the blade is damaged, the vortex at the rear portion of the blade is reduced, the shape resistance of the blade is obviously reduced, the airflow flows more smoothly, the flow of the fan is improved, the efficiency is improved, and the power of the motor is reduced.
The thickness of the blade is t, the height of the bulge along the direction vertical to the surface of the blade is a, a is f t, and f is 0.1-0.2.
The protrusion has a protrusion profile 251, when the protrusion is disposed on the pressure surface, the pressure surface profile 221 of the pressure surface includes the protrusion profile 251 and a second arc line 2211, the second arc line 2211 is connected with the protrusion profile 251 and is disposed in a staggered manner, the second arc line 2211 has at least one, the second arc line can be disposed to be connected with one end of the leading edge profile, or the protrusion profile is disposed to be connected with one end of the leading edge profile. When the suction surface is provided with the protrusions, the suction surface profile 241 of the suction surface comprises a protrusion profile 251 and a third arc 2411, the third arc 2411 is connected with the protrusion profile 251 and is arranged in a staggered manner, the third arc 2411 is provided with at least one, and the third arc can be arranged to be connected with the other end of the front edge profile or the protrusion profile is arranged to be connected with the other end of the front edge profile. The convex molded lines can be set to be circular arcs, the diameters of all the circular arcs can be the same or different, and the convex molded lines can also be spline curves.
The impeller still includes beaded finish 3, and beaded finish 3 locates the impeller tip and is connected with blade 2, and the beaded finish includes first beaded finish and second beaded finish, and first beaded finish and second beaded finish are connected respectively at the both ends of impeller, can play the effect of supporting the blade, reinforcing blade intensity.
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.
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, 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; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all 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 indoor unit of an air conditioner, comprising:
the air conditioner comprises a shell, an air inlet and an air outlet are formed in the shell, and the air inlet is communicated with the air outlet to form an air duct;
the heat exchanger is arranged in the air duct and used for exchanging heat with indoor air;
centrifugal fan locates in the wind channel, centrifugal fan includes spiral case and impeller, the impeller is located in the spiral case, the impeller includes rim plate and a plurality of blade, and is a plurality of the blade is followed rim plate circumference interval sets up, the blade includes blade leading edge, pressure side, blade trailing edge and the suction surface that head and the tail connected gradually, the molded lines of blade include leading edge molded lines, pressure side molded lines, trailing edge molded lines and the suction surface molded lines that head and the tail connected gradually, be equipped with the recess on the blade leading edge just the length direction of recess with the length direction of blade is parallel or sharp angle, and/or the anterior of at least one of pressure side and suction surface is equipped with the arch.
2. An indoor unit of an air conditioner according to claim 1, wherein the leading edge profile includes a first arc line and a groove profile of the groove, and the first arc line is connected to the groove profile and staggered.
3. An indoor unit of an air conditioner according to claim 2, wherein the first arc line has at least two, and the first arc line is a concentric arc line having a diameter D1。
4. An indoor unit of an air conditioner according to claim 3, wherein the groove profile is a groove arc having a diameter D2，D2＝k*D1And k is 0.1-0.2.
5. An indoor unit of an air conditioner according to claim 4, wherein the two ends of the leading edge profile are concentric arcs, the number of the groove arcs is N, the circle center of the groove arc and the two ends of the leading edge profile form N +2 points, an included angle formed by a connecting line of the two ends of the leading edge profile and the circle center of the concentric arc is α, and an included angle formed by a connecting line of the two adjacent ends and the circle center of the concentric arc is β, β ═ α/(N + 1).
6. An indoor unit of an air conditioner according to claim 4, wherein the center of the arc of the groove is located on the circumference on which the concentric arcs are located.
7. An indoor unit of an air conditioner according to claim 1, wherein the vane has a thickness t, and the height of the projection in a direction perpendicular to the vane surface is a, a ═ f × t, and f is 0.1 to 0.2.
8. An indoor unit of an air conditioner according to claim 1, wherein when the pressure surface is provided with the protrusions, the pressure surface profile includes a second arc line and the protruding profile of the protrusions, and the second arc line and the protruding profile of the protrusions are connected and alternately arranged.
9. An indoor unit of an air conditioner according to claim 1, wherein when the suction surface is provided with the protrusions, the suction surface profile includes a third arc line and the protrusion profile of the protrusions, and the third arc line is connected with the protrusion profile and arranged alternately.
10. An air conditioning indoor unit according to claim 1, wherein the pressure surface profile and/or the suction surface profile is connected to the leading edge profile by the convex profile of the protrusion.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021940912.4U CN213089943U (en) | 2020-09-07 | 2020-09-07 | Indoor unit of air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021940912.4U CN213089943U (en) | 2020-09-07 | 2020-09-07 | Indoor unit of air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213089943U true CN213089943U (en) | 2021-04-30 |
Family
ID=75634433
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021940912.4U Active CN213089943U (en) | 2020-09-07 | 2020-09-07 | Indoor unit of air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213089943U (en) |
-
2020
- 2020-09-07 CN CN202021940912.4U patent/CN213089943U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP5611360B2 (en) | Outdoor unit blower, outdoor unit and refrigeration cycle apparatus | |
| US11041506B2 (en) | Blower fan and air conditioner having same | |
| CN104180503A (en) | Propeller fan and air conditioner having the same | |
| JP5805214B2 (en) | Outdoor unit and refrigeration cycle apparatus including the outdoor unit | |
| KR100547328B1 (en) | The fan of air-conditioner outdoor unit | |
| KR101826359B1 (en) | Cross flow fan and air conditioner | |
| JP2013011235A (en) | Fan, outdoor unit and refrigerating cycle device | |
| CN213089943U (en) | Indoor unit of air conditioner | |
| CN216346604U (en) | Indoor unit of air conditioner | |
| CN215062438U (en) | Indoor machine of air conditioner | |
| WO2022205767A1 (en) | Axial-flow wind wheel, axial-flow fan, and air conditioner | |
| EP2597315B1 (en) | Cross flow fan and air conditioner | |
| CN213019934U (en) | Indoor unit of air conditioner | |
| CN213300295U (en) | Window type air conditioner | |
| CN214998436U (en) | Air conditioner | |
| CN216346674U (en) | Machine in heat exchanger and air conditioning | |
| CN219934111U (en) | Indoor unit of air conditioner | |
| CN115516211A (en) | Axial fan, air supply device, and refrigeration cycle device | |
| CN217582580U (en) | Air conditioner | |
| CN219995435U (en) | Indoor unit of air conditioner | |
| CN213480380U (en) | Indoor air conditioner | |
| CN112283806B (en) | Air conditioner | |
| CN218763717U (en) | Top air-out air conditioner outdoor unit | |
| CN220669594U (en) | Indoor unit of vertical air conditioner | |
| CN220750248U (en) | Indoor unit of vertical air conditioner |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |