CN105386996B - Centrifugal blower and air conditioner indoor unit for air conditioner indoor unit - Google Patents
Centrifugal blower and air conditioner indoor unit for air conditioner indoor unit Download PDFInfo
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- CN105386996B CN105386996B CN201510853696.7A CN201510853696A CN105386996B CN 105386996 B CN105386996 B CN 105386996B CN 201510853696 A CN201510853696 A CN 201510853696A CN 105386996 B CN105386996 B CN 105386996B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4226—Fan casings
-
- 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
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The present invention relates to a kind of centrifugal blowers and air conditioner indoor unit for air conditioner indoor unit.Specifically, the present invention provides a kind of centrifugal blower for air conditioner indoor unit, including spiral case and the impeller being set in spiral case.Impeller has multiple blades, and projection of the windward side of each blade in the basic plane perpendicular to the rotation axis of impeller includes the first circle segment and the second circle segment being smoothly connected.Therefore, the curve transition of windward side is relatively uniform, whole smoother, in the rotation process of impeller, air-flow streaks the resistance encountered when the windward side of blade and greatly reduces, and improves the air output of centrifugal blower, reduces the noise generated when centrifugal blower operation.The present invention also provides a kind of air conditioner indoor unit, including shell, it is located at the intracorporal heat exchanger of shell and centrifugal blower, it is big using the air conditioner indoor unit air output of above-mentioned centrifugal blower, noise is small.
Description
Technical field
The present invention relates to air driving and regulation technologies, more particularly to a kind of centrifugal blower for air conditioner indoor unit and
Air conditioner indoor unit.
Background technique
With the increasingly raising of people's quality of life, the requirement to the service performance of air conditioner is also higher and higher.Currently, adopting
The air conditioner for using centrifugal blower as air stream drives component is increasing.Centrifugal blower can promote air-flow to flow through changing for air conditioner
Hot device, and then the heat transferring medium in air-flow and heat exchanger is made to carry out heat exchange, to achieve the effect that refrigeration or heating.It is centrifuged wind
The air quantity and operation noise of machine will have a direct impact on the service performance of air conditioner and the usage experience of user.In the prior art usually
Its air quantity is improved by improving the revolving speed of centrifugal blower, however this not only will increase the energy consumption of air conditioner, also will increase centrifugation
Noise when fan operation cannot evenly be met the needs of users.Therefore how to be improved in the case where not increasing energy consumption from
The air quantity of heart blower reduces the technology hardly possible that the noise generated when centrifugal blower operation is those skilled in the art institute urgent need to resolve
Topic.
Summary of the invention
One purpose of first aspect present invention is intended to overcome at least one defect in the prior art, provides a kind of outlet air
Measure big, low noise the centrifugal blower for air conditioner indoor unit.
Another purpose of first aspect present invention is the air output for further increasing centrifugal blower, reduces centrifugal blower fortune
The noise generated when row.
One purpose of second aspect of the present invention is to provide a kind of air conditioner indoor unit.
According to the first aspect of the invention, the present invention provides a kind of centrifugal blower for air conditioner indoor unit, including spiral case
With the impeller being set in the spiral case,
The impeller has multiple blades, and the windward side of each blade is in the rotation axis perpendicular to the impeller
Projection in basic plane includes the first circle segment and the second circle segment being smoothly connected.
Optionally, projection of the leeward of each blade in the basic plane includes the be successively smoothly connected
Three-arc section, the 4th circle segment and the 5th circle segment.
Optionally, the tip surface for connecting the windward side and the leeward of each blade is in the basic plane
Interior projection includes the 6th circle segment, the both ends of the 6th circle segment respectively with second circle segment and described the
Five circle segments are smoothly connected.
Optionally, projection of the multiple blade in the basic plane is evenly distributed in the rotation of the impeller
Axle center is in the circumference for being projected as the center of circle in the basic plane；
First circle segment is curved from the first junction that it connect with the circumference to the radially inner side of the circumference
Qu Yanshen, the third circle segment are bent from the second junction that it connect with the circumference to the radially inner side of the circumference
Extend；And
Tangent line and the circumference towards the inside circumference of first circle segment in first junction point
The first angle between the tangent line towards the impeller direction of rotation of first junction point is more than or equal to the third
Circle segment is in tangent line of second junction point towards the inside circumference and the circumference at second junction
The second angle between the tangent line towards the impeller direction of rotation at place.
Optionally, first angle is an angle value of the range between 126 °~196 °；And
Second angle is an angle value of the range between 125 °~195 °.
Optionally, a length value of the blade root of each blade with a thickness of range between 1.8mm~2.9mm；Wherein
Circular arc wire length of the blade root with a thickness of the circumference between first junction and second junction
Degree.
Optionally, first circle segment is the curved section limited by the first central angle and the first radius, described
Two circle segments are the curved section limited by the second central angle and the second radius, and the third circle segment is by the third center of circle
The curved section that angle and third radius limit, the 4th circle segment is the arc limited by the 4th central angle and the 4th radius
Section, the 5th circle segment are the curved section limited by the 5th central angle and the 5th radius, the 6th circle segment
For the curved section limited by the 6th central angle and the 6th radius；Wherein
6th radius, the 5th radius, second radius, first radius, the 4th radius and institute
The value for stating third radius is sequentially increased；6th central angle, the 5th central angle, second central angle, described first
The value of central angle, the 4th central angle and the third central angle is sequentially reduced.
Optionally, the outer contour of projection of the spiral case in the basic plane forms the volute type of the spiral case
Line, the spiral case inlet pressure of the spiral case include the volute tongue being successively smoothly connected, the 7th circle segment, the 8th circle segment, the 9th circle
Arc section and straightway；And
7th circle segment is the curved section limited by the 7th central angle and the 7th radius；The 8th circular arc area
Section is the curved section limited by the 8th central angle and the 8th radius；9th circle segment is by the 9th central angle and the 9th
The curved section that radius limits；Wherein
The value of 7th radius, the 8th radius and the 9th radius is sequentially increased, the 7th central angle, institute
The value for stating the 9th central angle and the 8th central angle is sequentially reduced.
Optionally, the quantity of the blade selects between 37~57；
The diameter of the impeller is a length value of the range between 212mm~332mm；
The length value with a thickness of range between 79mm~124mm of the impeller.
According to the second aspect of the invention, the present invention also provides a kind of air conditioner indoor unit, including shell, it is located at the shell
Interior heat exchanger and blower, the blower are any of the above-described centrifugal blower.
In centrifugal blower for air conditioner indoor unit of the invention, due to impeller each blade windward side perpendicular to
Projection in the basic plane of the rotation axis of impeller includes the first circle segment and the second circle segment being smoothly connected, namely
It is that the windward side of each blade includes the first circular arc camber and the second circular arc camber being smoothly connected.Therefore, windward side is curved
Bent transition is relatively uniform, whole smoother, and in the rotation process of impeller, air-flow streaks to be encountered when the windward side of blade
Resistance greatly reduces, and improves the air output of centrifugal blower, reduces the noise generated when centrifugal blower operation.
Further, the leeward of each blade includes the third circular arc camber being successively smoothly connected, the 4th circular arc camber
With the 5th circular arc camber, the curve transition of the leeward of blade is also relatively uniform as a result, whole smoother, in turning for impeller
During dynamic, the windward side of the leeward of each blade and the blade adjacent with the blade cooperates, so that from two neighboring
The resistance that the air-flow flowed out between blade is encountered greatly reduces, further improve the air output of centrifugal blower, reduce from
The noise generated when heart fan operation.
Further, the corresponding radius of every section of circular arc of the spiral case inlet pressure of centrifugal blower and central angle are according to preset size
Relationship configuration, the corresponding radius of every section of circular arc and central angle of projecting blade are also configured according to preset size relation, as a result, originally
It invents specially designed spiral case and specially designed blade combines the centrifugal blower to be formed and increasing air output and reducing noise two
Aspect has unexpected beneficial effect simultaneously.
According to the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will be brighter
The above and other objects, advantages and features of the present invention.
Detailed description of the invention
Some specific embodiments of the present invention is described in detail by way of example and not limitation with reference to the accompanying drawings hereinafter.
Identical appended drawing reference denotes same or similar part or part in attached drawing.It should be appreciated by those skilled in the art that these
What attached drawing was not necessarily drawn to scale.In attached drawing:
Fig. 1 is the schematic diagram of the centrifugal blower according to an embodiment of the invention for air conditioner indoor unit；
Fig. 2 is a schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention；
Fig. 3 is the schematic expanded view of part A in Fig. 2；
Fig. 4 is another schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention；
Fig. 5 is the schematic expanded view of part B in Fig. 4；
Fig. 6 is another schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention；
Fig. 7 is the schematic expanded view of C portion in Fig. 6；
Fig. 8 is another schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention；
Fig. 9 is the schematic expanded view of the part D in Fig. 8；
Figure 10 is the schematic diagram of air conditioner indoor unit according to an embodiment of the invention.
Specific embodiment
The embodiment of the present invention provides a kind of centrifugal blower for air conditioner indoor unit.Fig. 1 is an implementation according to the present invention
The schematic diagram of the centrifugal blower for air conditioner indoor unit of example, centrifugal blower 10 may include spiral case 100 and be set to snail
Impeller 200 in shell 100.Centrifugal blower 10 further includes being set in spiral case 100, to drive the motor of the rotation of impeller 200 (in figure
It is not shown).
Fig. 2 is the schematic structure of the impeller of the centrifugal blower according to an embodiment of the invention for air conditioner indoor unit
Figure, Fig. 3 is the schematic expanded view of part A in Fig. 2.Specifically, centrifugal blower 10 can be forward-type centrifugal fan, impeller
200 direction of rotation is counterclockwise.Impeller 200 has multiple blades 210, and each blade 210 all has towards blade 210
The inner concave of inner recess and towards the arcuate surface protruded outside blade 210.In the rotation process of impeller 200, inner concave is straight
The air stream catered in centrifugal blower 10 is connect, air stream is pushed to flow out from the gap between two neighboring blade 210, therefore should
Inner concave forms the windward side of blade 210.Correspondingly, the arcuate surface opposite with inner concave forms the leeward of blade 210.
Projection of the windward side of each blade 210 in the basic plane of the rotation axis perpendicular to impeller 200 includes light
The first circle segment 211 and the second circle segment 212 of slip.Specifically, under state shown in Fig. 2, perpendicular to impeller 200
The basic plane of rotation axis be to be parallel to the plane of paper.That is, the windward side of each blade 210 includes light
The first circular arc camber and the second circular arc camber of slip.Therefore, the curve transition of windward side is relatively uniform, whole relatively light
Sliding, in the rotation process of impeller 200, air-flow streaks the resistance encountered when the windward side of blade 210 and greatly reduces, and improves
The air output of centrifugal blower 10 reduces the noise generated when centrifugal blower 10 is run.
Fig. 4 is another schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention, and Fig. 5 is figure
The schematic expanded view of part B in 4.Referring to fig. 4 and Fig. 5, in some embodiments of the invention, each blade 210 is leeward
Projection of the face in basic plane includes the third circle segment 213 being successively smoothly connected, the 4th circle segment 214 and the 5th circle
Arc section 215.The basic plane institute of " basic plane " mentioned here and the rotation axis mentioned above perpendicular to impeller 200
Refer to identical, in case of no particular description, the basic plane meaning mentioned in the embodiment of the present invention is all the same, below not
It repeats again.
That is, the leeward of each blade 210 includes the third circular arc camber being successively smoothly connected, the 4th circular arc
Curved surface and the 5th circular arc camber.The curve transition of the leeward of blade 210 is also relatively uniform as a result, whole smoother, in leaf
In the rotation process of wheel 200, the windward side phase interworking of the leeward of each blade 210 and the blade 210 adjacent with the blade 210
It closes, so as to greatly reduce from the resistance that the air-flow flowed out between two neighboring blade 210 is encountered, further improves centrifugation wind
The air output of machine 10 reduces the noise generated when centrifugal blower 10 is run.
In some embodiments of the invention, referring to Fig. 3 and Fig. 5, the connection windward side of each blade 210 and leeward
Projection of the tip surface in basic plane includes the 6th circle segment 216, and the both ends of the 6th circle segment 216 are round with second respectively
Arc section 212 and the 5th circle segment 215 are smoothly connected.The tip surface of blade 210 is that blade 210 is rotated close to impeller 200
One end face in axle center.That is, the tip surface of connection 210 windward side of blade and leeward is also a circular arc camber, the circle
Fiveth circular arc camber of two sides of arc surface respectively with the second circular arc camber of windward side and leeward is smoothly connected.By
This, each blade 210 all has that surface blending is uniform, the higher outer surface of smoothness, is conducive to air-flow flowing and reduces noise.
Fig. 6 is another schematic diagram of the impeller of centrifugal blower according to an embodiment of the invention, and Fig. 7 is figure
The schematic expanded view of C portion in 6, Fig. 8 are another signals of the impeller of centrifugal blower according to an embodiment of the invention
Property structure chart, Fig. 9 is the schematic expanded view of the part D in Fig. 8.Referring to Fig. 6 and Fig. 7, multiple blades 210 are in basic plane
Projection is evenly distributed in the circumference 220 for being projected as the center of circle with the axis of rotation of impeller 200 in basic plane.Further
Ground, projection of each blade 210 in basic plane are connect with circumference 220.Specifically, impeller 200 is more with being used to support
Projection of the outer rim of the annulus or circular slab of a blade 210, the annulus or circular slab in basic plane is configured to a circumference, should
The center of circle of circumference is overlapped with projection of the axis of rotation of impeller 200 in basic plane.Circumference 220 can be annulus or circular slab
Outer rim in basic plane projection formed circumference or same with projection of the outer rim of annulus or circular slab in basic plane
The circumference of the heart.
Referring to Fig. 7 and Fig. 9, the first circle segment 211 can be from the first junction 221 that it connect with circumference 220 to circumference
220 radially inner side, which is bent, to be extended, and third circle segment 213 is from the second junction 222 that it connect with circumference 220 to circumference
220 radially inner side, which is bent, to be extended.First junction 221 and the second junction 222 are two points not being overlapped on circumference 220,
So that the blade root opposite with its tip surface of each blade 210 all has certain thickness.
Further, tangent line and circle towards circumference 220 inside of first circle segment 211 at the first junction 221
First angle β of the week 220 between the tangent line towards 200 direction of rotation of impeller at the first junction 2211More than or equal to third
Tangent line and circumference 220 towards circumference 220 inside of the circle segment 213 at the second junction 222 is at the second junction 222
The tangent line towards 200 direction of rotation of impeller between the second angle β2.Specifically, the first circle segment 211 is in the first engagement
Tangent line at point 221 is by the first junction 221 minutes for positioned at the ray portion in 220 outside of circumference and positioned at 220 inside of circumference
Ray portion, the tangent line towards 220 inside of circumference of the first circle segment 211 are that the tangent line is located at penetrating for 220 inside of circumference
Line part.Similarly, tangent line of the third circle segment 213 at the second junction 222 is divided by the second junction 222 for positioned at circumference
The ray portion in 220 outsides and ray portion positioned at the inside of circumference 220, third circle segment 213 towards 220 inside of circumference
Tangent line be ray portion that the tangent line is located at the inside of circumference 220.That is, the first circle segment 211 and third circular arc
Section 213 has relative to circumference 220 than the relative to the bending degree having the same of circumference 220 or the first circle segment 211
The gentler bending degree of three-arc section 213.
Further, the first angle β1For an angle value of the range between 126 °~196 °.The designer of the application
By fluid analysis it has furthermore been found that as the first angle β1Value it is excessive when will lead to the contact of air-flow with 210 windward side of blade
Pressure is too small, and then influences the air output of centrifugal blower 10；Conversely, as the second angle β2It will lead to air-flow and blade when too small
The contact pressure of 210 windward sides is excessive, and then increases the noise of centrifugal blower 10.The designer of the application is by largely having
Body experiment discovery, as the first angle β1Value within the scope of 126 °~196 ° when, the air output of centrifugal blower 10 and inhibit noise
Effect obviously optimized.That is, the first angle β1Value can for 126 °, 134 °, 142 °, 157 °, 174 °,
185°,196°.In a further embodiment, the first angle β1Value can be within the scope of 142 °~174 °.Particularly, when first
Angle β1Value be 157 ° when effect be optimal.
Second angle β2For an angle value of the range between 125 °~195 °.The designer of the application is by largely having
Body experiment discovery, as the second angle β2Value within the scope of 125 °~195 ° when, the air output of centrifugal blower 10 and inhibit noise
Effect obviously optimized.That is, the first angle β1Value can for 125 °, 133 °, 141 °, 156 °, 173 °,
184°,195°.In a further embodiment, the first angle β1Value can be within the scope of 141 °~173 °.Particularly, when first
Angle β1Value be 156 ° when effect be optimal.
In some embodiments of the invention, the blade root of each blade 210 is with a thickness of range between 1.8mm~2.9mm
A length value.Circular arc line length of the blade root with a thickness of circumference 220 between the first junction 221 and the second junction 222.This
The designer of application had found by a large amount of specific experiment, can when the value of blade root thickness is within the scope of 1.8mm~2.9mm
It limits curved surface jointly with the first circle segment 211 and third circle segment 213 to smoothly transit and uniform blade shape, favorably
In the flowing of air-flow.That is, the value of blade root thickness can be 1.8mm, 2.0mm, 2.3mm, 2.6mm, 2.9mm.Into one
In the embodiment of step, the value of blade root thickness can be within the scope of 2.0mm~2.6mm.Particularly, when the value of blade root thickness is 2.3mm
Shi Xiaoguo is optimal.
In some embodiments of the invention, the first circle segment 211 is by the first central angle alpha1It is limited with the first radius
Curved section, the second circle segment 212 be by the second central angle alpha2The curved section limited with the second radius, third circular arc area
Section 213 is by third central angle alpha3The curved section limited with third radius, the 4th circle segment 214 are by the 4th central angle alpha4
The curved section limited with the 4th radius, the 5th circle segment 215 are by the 5th central angle alpha5The arc limited with the 5th radius
Section, the 6th circle segment 216 are by the 6th central angle alpha6The curved section limited with the 6th radius.6th radius, the 5th half
Diameter, the second radius, the first radius, the 4th radius and third radius value be sequentially increased, the 6th central angle alpha6, the 5th central angle alpha5、
Second central angle alpha2, the first central angle alpha1, the 4th central angle alpha4With third central angle alpha3Value be sequentially reduced.
The designer of the application is had found by a large amount of specific experiment, when the value of the first radius is in 17.4mm~27.1mm model
Enclose interior, the first central angle alpha1Value within the scope of 34 °~54 °, the value of the second radius is within the scope of 8.7mm~13.6mm, second
Central angle alpha2Value within the scope of 38 °~59 °, the value of third radius is within the scope of 22.3mm~34.9mm, third central angle alpha3's
It is worth within the scope of 8 °~14 °, the value of the 4th radius is within the scope of 19.4mm~30.7mm, the 4th central angle alpha4Value 16 °~
Within the scope of 26 °, the value of the 5th radius is within the scope of 7.8mm~12.1mm, the 5th central angle alpha5Value within the scope of 56 °~89 °,
The value of 6th radius is within the scope of 0.4mm~0.8mm, the 6th central angle alpha6Value within the scope of 132 °~206 ° when, can be total to
It smoothly transits and uniform blade shape with curved surface is limited, is conducive to the flowing of air-flow.That is, the value of the first radius can
Think 17.4mm, 21.7mm, 27.0mm, the first central angle alpha1Value can be 34 °, 43 °, 54 °, the value of the second radius can be
8.7mm, 10.9mm, 13.6mm, the second central angle alpha2Value can be 38 °, 47 °, 59 °, the value of third radius can be
22.3mm, 27.9mm, 34.9mm, third central angle alpha3Value can be 8 °, 11 °, 14 °, the value of the 4th radius can be
19.4mm, 24.3mm, 30.7mm, the 4th central angle alpha4Value can be 16 °, 21 °, 26 °, the value of the 5th radius can be
7.8mm, 9.7mm, 12.1mm, the 5th central angle alpha5Value can be 56 °, 71 °, 89 °, the value of the 6th radius can for 0.4mm,
0.6mm, 0.8mm, the 6th central angle alpha6Value can be 132 °, 165 °, 206 °.Particularly, when the first radius, the first central angle
α1, the second radius, the second central angle alpha2, third radius, third central angle alpha3, the 4th radius, the 4th central angle alpha4, the 5th radius,
5th central angle alpha5, the 6th radius, the 6th central angle alpha6Value be respectively 21.7mm, 43 °, 10.9mm, 47 °, 27.9mm, 11 °,
Effect is optimal when 24.3mm, 21 °, 9.7mm, 71 °, 0.6mm, 165 °.
In some embodiments of the invention, the outer contour of projection of the spiral case 100 in basic plane forms spiral case 100
Spiral case inlet pressure, the spiral case inlet pressure of spiral case 100 include the volute tongue 111 being successively smoothly connected, the 7th circle segment the 112, the 8th circle
Arc section 113, the 9th circle segment 114 and straightway 115.Specifically, spiral case 100 may include extending perpendicular to its thickness direction
Two side walls and connection two side walls peripheral wall.The peripheral wall of spiral case 100 may include the volute tongue curved surface being smoothly connected, the 7th circular arc
Curved surface, the 8th circular arc camber, the 9th circular arc camber and a plane.
7th circle segment 112 is by the 7th central angle alpha7The curved section limited with the 7th radius；8th circle segment
113 is by the 8th central angle alphas8The curved section limited with the 8th radius；9th circle segment 114 is by the 9th central angle alpha9With
The curved section that 9th radius limits.The value of 7th radius, the 8th radius and the 9th radius is sequentially increased, the 7th central angle alpha7、
9th central angle and the 8th central angle alpha8Value be sequentially reduced.The spiral case inner surface that transitions smooth can be formed as a result, is conducive to gas
The flowing of stream and reduction fan noise.
The designer of the application is had found by a large amount of specific experiment, when the value of the 7th radius is in 114mm~178mm range
Interior, the 7th central angle alpha7Value within the scope of 82 °~129 °, the value of the 8th radius within the scope of 146mm~228mm, the 8th circle
Heart angle α8Value within the scope of 56 °~88 °, the value of the 9th radius is within the scope of 170mm~266mm, the 9th central angle alpha9Value exist
It can be played in terms of improving 10 air output of centrifugal blower and reducing noise two when within the scope of 78 °~121 ° good beneficial
Effect.That is, the value of the 7th radius can be 114mm, 142.5mm, 178mm, the 7th central angle alpha7Value can be
82 °, 103 °, 129 °, the value of the 8th radius can be 146mm, 182.5mm, 228mm, the 8th central angle alpha8Value can be
56 °, 70 °, 88 °, the value of the 9th radius can be 170mm, 212.5mm, 266mm, the 9th central angle alpha9Value can for 78 °,
97°,121°.Particularly, when the 7th radius, the 7th central angle alpha7, the 8th radius, the 8th central angle alpha8, the 9th radius, the 9th circle
Heart angle α9Value when being respectively 142.5mm, 103 °, 182.5mm, 70 °, 212.5mm, 97 ° effect be optimal.
The researching and designing discovery of designer of the invention by the shape to spiral case 100 and blade 210, the embodiment of the present invention
In, the corresponding radius of every section of circular arc and central angle of the spiral case inlet pressure of centrifugal blower 10 are configured according to preset size relation, leaf
The corresponding radius of every section of circular arc and central angle of piece projection are also configured according to preset size relation, and the present invention is especially set as a result,
The centrifugal blower 10 that spiral case 100 and specially designed blade 210 combination of meter are formed is increasing air output and is reducing by two side of noise
Face has unexpected beneficial effect simultaneously.
In some embodiments of the invention, the quantity of blade 210 selects between 37~57.Namely
It says, the quantity of blade 210 can be 37,42,47,52,57.Particularly, when the quantity of blade 210 is 47, effect is optimal.Leaf
The diameter of wheel 200 is a length value of the range between 212mm~332mm.That is, the diameter of impeller 200 can value be
212mm,265mm,332mm.Particularly, when the diameter value of impeller 200 is 265mm, effect is optimal.Impeller 200 with a thickness of
A length value of the range between 79mm~124mm.That is, the thickness of impeller 200 can value be 79mm, 98.5mm,
124mm.Particularly, when the Thickness of impeller 200 is 98.5mm, effect is optimal.
In some embodiments of the invention, volute tongue 111 is projected as in basic plane by the tenth central angle and the tenth
The circle segment that radius limits.That is, volute tongue 111 is also a circular arc camber, it is smoothly connected with the 7th circular arc camber.The
Ten radiuses can be a length value of the range between 10mm~16mm, that is to say, that the tenth radius can value be 10mm,
12.5mm,16mm.It particularly, is that effect is optimal when the tenth radius value is 12.5mm.
In some embodiments of the invention, referring to Fig. 1, spiral case is defined between the peripheral wall and two side walls of spiral case 100
Air duct inside 100.Width W of the air duct at volute tongue 111 is a length value of the range between 195mm~305mm, wherein
Vertical range and volute tongue 111 institute of width W of the air duct at volute tongue 111 for the distance of center circle straightway 115 of 111 place circumference of volute tongue
In the difference of the radius of circumference.Width W of the air duct at volute tongue 111 can value be 195mm, 245mm, 305mm.Particularly, work as wind
Effect is best when width W value of the road at volute tongue 111 is 245mm.
The embodiment of the present invention also provides a kind of air conditioner indoor unit, and Figure 10 is in air conditioning chamber according to an embodiment of the invention
The schematic diagram of machine.Air conditioner indoor unit 1 includes shell 2, heat exchanger 3 and blower 4 in shell 2, and blower 4 is above-mentioned
Centrifugal blower involved in any embodiment.
So far, although those skilled in the art will appreciate that present invention has been shown and described in detail herein multiple shows
Example property embodiment still without departing from the spirit and scope of the present invention, still can according to the present disclosure directly
Determine or deduce out many other variations or modifications consistent with the principles of the invention.Therefore, the scope of the present invention is understood that and recognizes
It is set to and covers all such other variations or modifications.
Claims (8)
1. a kind of centrifugal blower for air conditioner indoor unit, including spiral case and the impeller being set in the spiral case, feature exists
In,
The centrifugal blower is forward-type centrifugal fan, and the impeller has multiple blades, and the windward side of each blade exists
It include the first circle segment being smoothly connected and the second circle perpendicular to the projection in the basic plane of the rotation axis of the impeller
Arc section, projection of the leeward of each blade in the basic plane includes the third circular arc area being successively smoothly connected
Section, the 4th circle segment and the 5th circle segment；
Projection of the multiple blade in the basic plane is evenly distributed in the axis of rotation with the impeller described
It is projected as in the circumference in the center of circle in basic plane；
First circle segment is bent from the first junction that it connect with the circumference to the radially inner side of the circumference to be prolonged
It stretches, the third circle segment is bent from the second junction that it connect with the circumference to the radially inner side of the circumference to be prolonged
It stretches；And
First circle segment is in tangent line towards the inside circumference of first junction point and the circumference in institute
The first angle stated between the tangent line towards the impeller direction of rotation of the first junction point is more than or equal to the third circular arc
Section is in tangent line of second junction point towards the inside circumference and the circumference in second junction point
The second angle towards between the tangent line of the impeller direction of rotation.
2. centrifugal blower according to claim 1, which is characterized in that
The projection packet of the connection windward side of each blade and the tip surface of the leeward in the basic plane
Include the 6th circle segment, the both ends of the 6th circle segment respectively with second circle segment and the 5th circle segment
It is smoothly connected.
3. centrifugal blower according to claim 2, which is characterized in that
First angle is an angle value of the range between 126 °~196 °；And
Second angle is an angle value of the range between 125 °~195 °.
4. centrifugal blower according to claim 2, which is characterized in that
A length value of the blade root of each blade with a thickness of range between 1.8mm~2.9mm；Wherein
Circular arc line length of the blade root with a thickness of the circumference between first junction and second junction.
5. centrifugal blower according to claim 2, which is characterized in that
First circle segment is the curved section limited by the first central angle and the first radius, and second circle segment is
The curved section limited by the second central angle and the second radius, the third circle segment are by third central angle and third radius
The curved section of restriction, the 4th circle segment are the curved section limited by the 4th central angle and the 4th radius, described
Five circle segments are the curved section limited by the 5th central angle and the 5th radius, and the 6th circle segment is by the 6th center of circle
The curved section that angle and the 6th radius limit；Wherein
6th radius, the 5th radius, second radius, first radius, the 4th radius and described
The value of three radiuses is sequentially increased；6th central angle, the 5th central angle, second central angle, first center of circle
The value at angle, the 4th central angle and the third central angle is sequentially reduced.
6. centrifugal blower according to claim 1, which is characterized in that
The outer contour of projection of the spiral case in the basic plane forms the spiral case inlet pressure of the spiral case, the spiral case
Spiral case inlet pressure includes the volute tongue being successively smoothly connected, the 7th circle segment, the 8th circle segment, the 9th circle segment and straight line
Section；And
7th circle segment is the curved section limited by the 7th central angle and the 7th radius；8th circle segment is
The curved section limited by the 8th central angle and the 8th radius；9th circle segment is by the 9th central angle and the 9th radius
The curved section of restriction；Wherein
The value of 7th radius, the 8th radius and the 9th radius is sequentially increased, the 7th central angle, described
The value of nine central angles and the 8th central angle is sequentially reduced.
7. centrifugal blower according to claim 1, which is characterized in that
The quantity of the blade selects between 37~57；
The diameter of the impeller is a length value of the range between 212mm~332mm；
The length value with a thickness of range between 79mm~124mm of the impeller.
8. a kind of air conditioner indoor unit, including shell, it is located at the intracorporal heat exchanger of the shell and blower, which is characterized in that the wind
Machine is centrifugal blower as claimed in claim 1 to 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510853696.7A CN105386996B (en) | 2015-11-30 | 2015-11-30 | Centrifugal blower and air conditioner indoor unit for air conditioner indoor unit |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510853696.7A CN105386996B (en) | 2015-11-30 | 2015-11-30 | Centrifugal blower and air conditioner indoor unit for air conditioner indoor unit |
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| CN105386996A CN105386996A (en) | 2016-03-09 |
| CN105386996B true CN105386996B (en) | 2018-12-18 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106765600B (en) * | 2017-01-20 | 2022-09-16 | 美的集团武汉制冷设备有限公司 | Air conditioner indoor unit and air guide shutter thereof |
| CN110382876B (en) * | 2018-07-27 | 2022-02-22 | 深圳市大疆创新科技有限公司 | Centrifugal fan and electronic equipment |
| DE102019210077A1 (en) | 2019-07-09 | 2021-01-14 | Ziehl-Abegg Se | Fan with scroll housing and scroll housing for one fan |
| CN111878424B (en) * | 2020-08-25 | 2024-05-17 | 中山市高途五金制品有限公司 | Large air volume volute fan |
| CN118309690B (en) * | 2024-06-11 | 2024-08-20 | 广东顺威精密塑料股份有限公司 | Volute tongue structure, double-suction volute using same and design method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000145693A (en) * | 1998-11-09 | 2000-05-26 | Hitachi Ltd | Multiblade forward fan |
| CN1497184A (en) * | 2002-10-18 | 2004-05-19 | 亨特风扇公司 | High-efficiency centrifugal fan |
| CN202140342U (en) * | 2011-07-26 | 2012-02-08 | 珠海格力电器股份有限公司 | Air conditioner and centrifugal fan blade thereof |
| CN103511335B (en) * | 2012-06-25 | 2016-08-24 | 珠海格力电器股份有限公司 | Air conditioner, centrifugal fan and blade thereof |
| CN103573701A (en) * | 2012-07-30 | 2014-02-12 | 广东美的暖通设备有限公司 | Indoor unit of air conditioner and bidirectional inlet centrifugal wind wheel of indoor unit |
| CN104165158B (en) * | 2014-08-06 | 2016-09-21 | 宁波方太厨具有限公司 | A kind of centrifugal blower of range hood |
| CN105020176A (en) * | 2015-08-20 | 2015-11-04 | 珠海格力电器股份有限公司 | Fan blade and centrifugal ventilator |
| CN205190328U (en) * | 2015-11-30 | 2016-04-27 | 青岛海尔空调器有限总公司 | A machine in centrifugal fan and air conditioning for machine in air conditioning |
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