CN205503552U - Propeller type fan and heat source unit - Google Patents
Propeller type fan and heat source unit Download PDFInfo
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- CN205503552U CN205503552U CN201620148601.1U CN201620148601U CN205503552U CN 205503552 U CN205503552 U CN 205503552U CN 201620148601 U CN201620148601 U CN 201620148601U CN 205503552 U CN205503552 U CN 205503552U
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Abstract
The utility model provides a propeller type fan and heat source unit. Propeller type fan (13) possess the configuration in wheel hub (41) of central authorities, and set up in wheel hub (41) a plurality of paddles (42) on every side. The trailing edge portion (42c) of a plurality of paddles (42) has 2 groups or is more than profile part (47) 2 groups, that regard concave part (45) and convex part (46) as 1 group, concave part (45) are sunken with the reverse ground bending of the outflow direction of air, the periphery side of convex part (46) and concave part (45) links to each other and towards the outflow direction of air. The depth dimension of the second concave part (45b) that the configuration contains in the second profile part (47b) of paddle (42) periphery side be greater than the configuration paddle (42) in week the side first profile partial (47a) in the depth dimension of the first concave part (45a) that contains. The utility model discloses the reduction effect that can compromise the air supply noise descends with avoiding the amount of wind.
Description
Technical field
Embodiment of the present utility model relates to a kind of screw ventilation (propeller fan) and heat source unit (unit).
Background technology
Screw ventilation is used for the outdoor unit of air conditioner, the heat source machine of heat pump (heat pump) formula water heater, cold
The heat source units such as the outdoor unit freezing machine.
As conventional screw ventilation, it is known to have the contour line person of concave shape, described spill shape in trailing edge portion
Shape refers to flow out direction depression in opposite direction towards with air.There is multiple leaves in the width dimensions of the depression of this concave shape
Difference in each blade of sheet.
Conventional screw ventilation is by the depression of the different concave shape of width dimensions in each blade, at propeller type wind
When machine rotates, suppress the vortex that the wake flow side of each blade periodically produces to reduce air-supply noise.The concave shape of each blade
Depression is a depression of arc-shaped.
But, though forming the way of arc-shaped depression throughout the total length of the contour line in trailing edge portion can improve the fall of noise of blowing
Low effect, can cause blade area to be greatly decreased and cause air quantity to decline but then.On the other hand, in trailing edge portion
Though a part for contour line, such as blade outer circumferential side formed throughout about the half of contour line arc-shaped depression way energy
Suppress the minimizing of blade area to avoid air quantity to decline, the reducing effect of air-supply noise can be offset but then.
Prior art literature
Patent documentation
Patent documentation 1: Japanese Patent Laid-Open 2014-77437 publication
Utility model content
[purpose of utility model]
The purpose of this utility model be to obtain the reducing effect taking into account air-supply noise and the screw ventilation avoiding air quantity to decline with
And heat source unit.
[solving the technological means of problem]
In order to solve described problem, the screw ventilation of embodiment of the present utility model includes: wheel hub, is arranged in central authorities；
And multiple blade, be arranged on around wheel hub, the trailing edge portion of the plurality of blade have 2 groups or more than 2 groups, will
Recess and protuberance are as the outline portion of 1 group, and described recess is throughout the inner circumferential side of blade to outer circumferential side, with the outflow side of air
To bent recess inversely, described protuberance is that the outer circumferential side with described recess is connected, and towards the outflow direction of air, makes configuration
The depth dimensions of the second recess contained in the described outline portion of described blade outer circumferential side, more than being arranged in described blade inner circumferential
The depth dimensions of the first recess contained in the described outline portion of side.
And, described first recess of the screw ventilation of embodiment has the profile of curve with Straight Combination, institute
Stating the second recess and have the profile of curve, the contour line length of described second recess is longer than the contour line length of described first recess.
And, the depth dimensions of the described recess of the screw ventilation of embodiment in each blade of the plurality of blade not
With.
And, the depth dimensions of described first recess of the screw ventilation of embodiment is identical between the plurality of blade, institute
The depth dimensions stating the second recess is different in each blade of the plurality of blade.
And then, the heat source unit of embodiment includes: described screw ventilation；And heat exchanger, and by described spiral
Paddle blower fan and the air that flows carries out heat exchange.
And then, the heat source unit of embodiment includes: framework, houses described screw ventilation, and has blow-off outlet；And
Bellmouth, surrounds described screw ventilation, guides the flowing of air produced by described screw ventilation, so that
Air is from described blow-off outlet blowout to framework, at least one blade in the plurality of blade, described trailing edge portion
Before first distance L1 of front end and described belled front end and the deepest position of the degree of depth of described second recess and described bellmouth
The relation of the second distance L2 of end is 0.4≤(second distance L2) ÷ (the first distance L1)≤0.75.
And then, the heat source unit of embodiment includes: framework, houses described screw ventilation, and has blow-off outlet；And
Bellmouth, surrounds described screw ventilation, guides the flowing of air produced by described screw ventilation, so that
Air is from described blow-off outlet blowout to framework, at least one blade in the plurality of blade, described trailing edge portion
Before first distance L1 of front end and described belled front end and the deepest position of the degree of depth of described second recess and described bellmouth
The relation of the second distance L2 of end is 0.57≤(second distance L2) ÷ (the first distance L1)≤0.7.
Thereby, it is possible to provide a kind of reducing effect taking into account air-supply noise and the screw ventilation avoiding air quantity to decline and thermal source list
Unit.
Accompanying drawing explanation
Fig. 1 is the general view of the off-premises station of the air conditioner of embodiment of the present utility model.
Fig. 2 is the axonometric chart of the screw ventilation observing embodiment of the present utility model from face side.
Fig. 3 is the front elevation of the screw ventilation of embodiment of the present utility model.
Fig. 4 is the figure of blade (blade) enlarged representation of the screw ventilation by embodiment of the present utility model.
Fig. 5 is the pressure-plotting based on numerical value fluid analysis of the screw ventilation of embodiment of the present utility model.
Fig. 6 is the pressure-plotting based on numerical value fluid analysis of the screw ventilation of comparative example.
Fig. 7 is the figure of the experimental data of the wind pushing performance determination experiment of the screw ventilation representing present embodiment.
Fig. 8 is the vertical profile of screw ventilation and the belled size relationship conceptually representing embodiment of the present utility model
Face figure.
Fig. 9 is the first distance L1 in the screw ventilation representing present embodiment and the ratio of second distance L2 and motor
The experimental data of relation of input.
Reference:
1: air conditioner
2: off-premises station
3: indoor set
11: framework
12: outdoor heat converter
13: screw ventilation
15: motor
16: pressure fan
17: compressor
18: cross valve
19: controller
21: base plate
22: body cover
23: demarcation strip
25: heat-exchanging chamber
26: Machine Room
27: blow-off outlet
28: bellmouth
28a: front end
29: motor fixed plate
31: refrigerant piping
41: wheel hub
42: blade
42a: root
42A, 42B, 42C: blade
42b: blade inlet edge portion
42c: trailing edge portion
42d: blade peripheral part
45: recess
45a: the first recess
45b: the second recess
46: protuberance
46a: the first protuberance
46b: the second protuberance
47: outline portion
47a: the first profile part
47b: the second outline portion
48: top
100: screw ventilation
101: wheel hub
102: blade
102c: trailing edge portion
105: recess
A1, A2: scope
D1, D2: depth dimensions
D2max: the position that the degree of depth is the deepest
F, R: solid arrow
L: line segment
L1: the first distance
L2: second distance
O: central point
P1: intersection point
The front end in P2: intersection point/trailing edge portion
W, W1, W2: width dimensions
α: the contour line in trailing edge portion
α 2a: curved portion
α 2b: straight line portion
α 1: trailing edge inner circumferential side contour line
α 2: the first concave contour line
α 3: the first cam profile
α 4: the second concave contour line
α 5: the second cam profile
β: the contour line of blade peripheral part
γ: the contour line in blade inlet edge portion
Detailed description of the invention
For the embodiment as heat source unit of the present utility model, air conditioner off-premises station, enter referring to figs. 1 through Fig. 9
Row explanation.
Fig. 1 is the general view of the off-premises station of the air conditioner of embodiment of the present utility model.
As it is shown in figure 1, air conditioner 1 comprises off-premises station 2 and indoor set 3.The off-premises station 2 of air conditioner 1 includes: framework 11,
Flat shape is the outdoor heat converter 12 of substantially L-shaped, comprises screw ventilation 13 and drive screw ventilation 13 to revolve
The controllers 19 such as the pressure fan 16 of motor 15, compressor 17, cross valve 18 and the inverter (inverter) turned.Outdoor
Heat exchanger 12, pressure fan 16, compressor 17, cross valve 18 and controller 19 are incorporated in framework 11.
Framework 11 possesses: base plate 21, supporting outdoor heat converter 12, pressure fan 16, compressor 17, cross valve 18 and control
Device 19 processed；And body cover 22, cover base plate 21.
In framework 11, it is provided with demarcation strip 23.Demarcation strip 23 divides heat-exchanging chamber 25 and Machine Room 26 in framework 11,
Described heat-exchanging chamber 25 reception room outer heat-exchanger 12 and pressure fan 16, described Machine Room 26 houses compressor 17, cross valve
18, controller 19.The back side of framework 11 and one of them side have the suction inlet of the air leading to heat-exchanging chamber 25 and (omit
Diagram).
The front surface of framework 11 has blow-off outlet 27.It is provided around bellmouth 28 at blow-off outlet 27.Bellmouth 28 has
The specific length in heat-exchanging chamber 25 is projected to from the back side of the front surface of framework 11.
Pressure fan 16 is with blow-off outlet 27 in opposite directions.The screw ventilation 13 of pressure fan 16 is to be surrounded by bellmouth 28, spiral
The flowing of air produced by paddle blower fan 13 is guided by bellmouth 28 and blows out to framework 11 from blow-off outlet 27.In framework
The front surface of 11, is provided with the shield of blower fan (fan guard) (omitting diagram) of whole that covers blow-off outlet 27, to guarantee
Safety.The motor 15 of pressure fan 16 utilizes the fixtures such as screw (omitting diagram) to be fixed on the base plate 21 of framework 11
Upper set motor (motor) fixed plate 29.
Off-premises station 2 is connected to indoor set 3 via refrigerant piping 31.When the operation start of freeze cycle, compressor 17 is subject to
To driving.Compressor 17 makes cold-producing medium circulate in refrigerant piping with guide chamber outer heat-exchanger 12.Meanwhile, pressure fan 16
Operation start.Motor 15 drives screw ventilation 13 to rotate.
Ambient atmos is imported into heat-exchanging chamber 25 from the back side of framework 11 with the suction inlet of side, and by outdoor heat converter 12
To carry out heat exchange with the cold-producing medium in outdoor heat converter 12.The air warp of heat exchange has been carried out in outdoor heat converter 12
It is directed to bellmouth 28 by pressure fan 16, and is expelled to outside from the blow-off outlet 27 of framework 11 front surface.
It follows that describe screw ventilation 13 in detail.
Fig. 2 is the axonometric chart of the screw ventilation observing embodiment of the present utility model from face side.
Fig. 3 is the front elevation of the screw ventilation of embodiment of the present utility model.
As shown in Figures 2 and 3, the screw ventilation 13 of present embodiment possesses: be arranged in the wheel hub 41 of central authorities, Yi Jishe
Put the blade 42 as multiple blades around wheel hub 41.It addition, the front of screw ventilation 13 is blade pressure surface,
The back side is blade suction surface.When screw ventilation 13 is driven and rotates, along rotary shaft from blade suction surface side court
To blade pressure surface Lateral supply.
Cylindric wheel hub 41 is arranged on the central part of screw ventilation 13.
Multiple blades 42 such as 3 blades 42A, 42B, 42C are equally spaced to be arranged in wheel hub 41 around, and integratedly
It is arranged at wheel hub 41.Each blade 42 reverses obliquely relative to the shaft core direction of rotary shaft.It addition, blade 42 is alternatively
2 or be 4 or more than 4.
Herein, the part being connected with integratedly with wheel hub 41 of blade 42 is referred to as root 42a, by the rotation of screw ventilation 13
Turn front side, direction (the solid arrow R in Fig. 3) and be referred to as blade inlet edge portion 42b, trailing edge portion 42c will be referred to as on rear side of direction of rotation,
It is referred to as blade peripheral part 42d by linking the blade inlet edge portion 42b outer circumference end end with trailing edge portion 42c outer circumference end.
If the flowing (the solid arrow F in Fig. 3) of the air on the blade 42 that will rotate with screw ventilation 13 is set to base
Standard, then blade inlet edge portion 42b is the inflow side of air, and trailing edge portion 42c is the outflow side of air.
Herein, the contour line of blade inlet edge portion 42b is referred to as γ, the contour line of trailing edge portion 42c is referred to as α, by outside blade
The contour line of perimembranous 42d is referred to as β.
The contour line γ of blade inlet edge portion 42b in blade peripheral part 42d side compared with in root 42a side towards direction of rotation (Fig. 3
In solid arrow R) the most prominent.
Then, trailing edge portion 42c is described in detail.
Fig. 4 is the figure of the blade enlarged representation of the screw ventilation by embodiment of the present utility model.
In addition to Fig. 2 and Fig. 3, the most as shown in Figure 4, multiple blades 42 of the screw ventilation 13 of present embodiment
Trailing edge portion 42c have 2 groups or more than 2 groups, using recess 45 and protuberance 46 as the outline portion 47 of 1 group, described
Recess 45 is throughout the inner circumferential side of blade 42 to outer circumferential side, with the outflow direction bent recess inversely of air, described protuberance 46
It is that the outer circumferential side with recess 45 is connected, and towards the outflow direction of air.
More specifically, the contour line α of the trailing edge portion 42c of multiple blades 42 has the trailing edge inner circumferential side wheel of straight
The concave first concave contour line α 2 flowing out direction bent recess inversely of profile α 1 and air, flow out direction towards air
First cam profile α 3 of convex and concave second concave contour line α 4 and the court flowing out direction bent recess inversely of air
Flow out the second cam profile α 5 of convex in direction to air, using as from root 42a side towards blade peripheral part 42d side phase
Multiple contour lines even.First concave contour line α 2 is connected to the outer circumferential side of trailing edge inner circumferential side contour line α 1, the first cam profile α 3
Being connected to the outer circumferential side of the first concave contour line α 2, the second concave contour line α 4 is connected to the outer circumferential side of the first cam profile α 3, the second cam
Profile α 5 is connected to the outer circumferential side of the second concave contour line α 4, and arrives the contour line β of blade peripheral part 42d.
First concave contour line α 2 and the first cam profile α 3 is 1 group of outline portion 47, referred to as the first profile part 47a.And,
Second concave contour line α 4 and the second cam profile α 5 is 1 group of outline portion 47, the referred to as second outline portion 47b.First recessed takes turns
Profile α 2 is equivalent to the recess 45 of the first profile part 47a, calls it as the first recess 45a.First cam profile α 3 is suitable
In the protuberance 46 of the first profile part 47a, call it as the first protuberance 46a.Second concave contour line α 4 is equivalent to the second profile portion
Divide the recess 45 of 47b, call it as the second recess 45b.Second cam profile α 5 is equivalent to the protuberance of the second outline portion 47b
46, call it as the second protuberance 46b.
Herein, using the length of the line segment L that links intersection point P1 and intersection point P2 as the width dimensions W of recess 45, will be by from line segment
The size of the width that L guides the first profile part 47a side that the vertical line of the first protuberance 46a is split into is referred to as width dimensions W1, will
It is trailing edge inner circumferential side contour line that the size of the width of the second outline portion 47b side is referred to as width dimensions W2, described intersection point P1
α 1 and the intersection point of the first concave contour line α 2, described intersection point P2 is to guide blade 42 most peripheral side into the central point O from wheel hub 41
The intersection point of tangent line of contour line that is second cam profile α 5.And, the length of the vertical line of the first recess 45a will be guided into from line segment L
Degree is set to the depth dimensions D1 of the first recess 45a, the length guiding the vertical line of the second recess 45b from line segment L into is set to second recessed
The depth dimensions D2 of portion 45b.
Now, the depth dimensions D2 of the second contained recess 45b it is arranged in the second outline portion 47b of blade 42 outer circumferential side
More than the depth dimensions D1 being arranged in the first recess 45a contained in the first profile part 47a of blade 42 inner circumferential side.Second is recessed
The full-size of the depth dimensions D2 of the portion 45b full-size more than the depth dimensions D1 of the first recess 45a.That is, exist (deep
The full-size of degree dimension D 2) relation of ＞ (full-size of depth dimensions D1).
First recess 45a has the first concave contour line α 2 of curve with Straight Combination.First concave contour line α 2 has and pen
The trailing edge inner circumferential side contour line α 1 of straight shape at a distance of the most remote, curved portion α 2a that the degree of depth is more to increase and with curved portion α 2a
The straight line portion α 2b being connected.Preferably, the straight line portion α 2b of the first concave contour line α 2 is parallel relative to line segment P1-P2,
Or increase the degree of depth of outer circumferential side compared with the inner circumferential side of blade 42.Further, at the straight line portion and of the first concave contour line α 2
The first cam profile α 3 is presented between the second concave contour line α 4 of two recess 45b.The curvature of the first concave contour line α 2 (or bent
Rate radius) both can be equally, it is possible to the curve combination of different curvature (or radius of curvature) is formed.
Second recess 45b has the second curved concave contour line α 4.Second concave contour line α 4 is straight from the first concave contour line α's 2
Line part (or first cam profile α 3) significantly bends and increases depth dimensions, and is positioned against blade periphery from depth capacity
The contour line β of portion 42d makes depth dimensions recover and shoal.Contour line β at the second concave contour line α 4 and blade peripheral part 42d
Between present the second cam profile α 5.
Further, the contour line length of the second recess 45b is longer than the contour line length of the first recess 45a.More specifically, with
The top 48 on the mountain of one cam profile α 3 is border, and the second concave contour line α 4 is longer than the first concave contour line α 2.
It addition, the screw ventilation 13 of present embodiment has 2 groups using recess 45 and protuberance 46 as the outline portion of 1 group
47, but also can have 3 groups or more than 3 groups, using recess 45 and protuberance 46 as the outline portion 47 of 1 group.Now, excellent
Choosing, belongs to the recess 45 of most peripheral side profile part 47 compared with the recess 45 belonging to other outline portions 47, depth dimensions
Bigger, contour line length is longer.Further it is preferred that more toward the outer circumferential side of blade 42, the width of other outline portions 47
Size, depth dimensions, contour line length are the biggest.
And then, the depth dimensions of recess 45 is different in each blade 42 of multiple blades 42.Specifically, the first recess 45a
Depth dimensions D1 identical between multiple blades 42, on the other hand, the depth dimensions D2 of the second recess 45b is at multiple blades
Each blade in different.That is, there is following relation: (depth dimensions D1a)=(depth dimensions D1b)=(depth dimensions
D1c), on the other hand, (depth dimensions D2a) ≠ (depth dimensions D2b), (depth dimensions D2b) ≠ (depth dimensions
D2c), (depth dimensions D2c) ≠ (depth dimensions D2a).It is particularly present (depth dimensions D2a) ＞ (depth dimensions D2b)
The relation of ＞ (depth dimensions D2c).Specifically, such as have diameter 140mm wheel hub 41, outside dimension 560
In the screw ventilation 13 of mm, depth dimensions D2a is set to 35mm, depth dimensions D2b and is set to 30mm,
Depth dimensions D2c is set to about 25mm.
When screw ventilation 13 rotates towards the direction of the solid arrow R in Fig. 3, air is before the blade of each blade 42
Edge 42b moves along surface (pressure surface) side and the back side (suction surface) effluent of blade 42 and arrives trailing edge portion 42c.
Further, departed from from trailing edge portion 42c by the air after blade 42 and leave blade 42.
Now, hit dry by the air after certain blade 42 and the air magnetic each other flowed between this blade 42 and another blade 42
Relate to and produce vortex.This vortex influences whether blade tone (pitch) sound.
Furthermore it is known that there is a kind of technology, by arranging recess at trailing edge portion 42c, thus suppress vortex to a certain extent
Produce, reduce blade pitch bell.But, in conventional screw ventilation, in trailing edge portion, 42c is provided with an arcuation
Recess, therefore to significantly suppression blade pitch bell, must will excavate the width of recess and depth-set blade 42 relatively greatly
Relatively big, its result, significantly lose the area of blade 42 and cause air quantity to decline.
Therefore, inventor is found that a kind of screw ventilation 13, by having 2 groups or more than 2 groups at trailing edge portion 42c
, using recess 45 and protuberance 46 as the outline portion 47 of 1 group, thus suppress the area of blade 42 to reduce to guarantee air quantity,
And the generation of suppression vortex is to reduce air-supply noise, described recess 45 is the outflow direction bent recess inversely with air, described
Protuberance 46 is that the outer circumferential side with recess 45 is connected.
Fig. 5 is the pressure-plotting based on numerical value fluid analysis of the screw ventilation of embodiment of the present utility model.
Fig. 6 is the pressure-plotting based on numerical value fluid analysis of the screw ventilation of comparative example.
Fig. 5 is the numerical value fluid analysis of screw ventilation 13 based on present embodiment, represents with hachure (hatching)
When it rotates, pressure oscillation is more than the scope of certain numerical value.And, Fig. 6 is the numerical value of screw ventilation 100 based on comparative example
With hachure, fluid analysis, represents that pressure oscillation is more than the scope being set as certain identical numerical value with Fig. 5 when it rotates.It addition,
Circle around screw ventilation 13,100 is equivalent to bellmouth 28.
Herein, as shown in Figure 6, the screw ventilation 13 that the screw ventilation 100 of comparative example possesses with present embodiment is same
The wheel hub 101 of sample and the multiple blades 102 different from the screw ventilation 13 of present embodiment.
Multiple blades 102 vary considerably with the blade 42 of the screw ventilation 13 of present embodiment, in trailing edge portion
102c has the recess 105 of an arc-shaped.
The condition of numerical value fluid analysis is the same terms in addition to the difference of screw ventilation 13,100.And, it is used for counting
The mathematical model (model) of the screw ventilation 13,100 of value fluid analysis has the external diameter being substantially the same.
Under these analysis conditions, as shown in Figures 5 and 6, for the pressure oscillation scope of certain numerical value, with the spiral of comparative example
Paddle blower fan 100 is compared, and is greatly decreased in the screw ventilation 13 of present embodiment.Especially it is appreciated that at the stream of air
The outer circumferential side of the blade 42,102 that speed uprises, reducing of pressure oscillation scope is significant, and the reducing effect of air-supply noise improves.
Fig. 7 is the figure of the experimental data of the wind pushing performance determination experiment of the screw ventilation representing present embodiment.
Fig. 7 represents the air-supply level of noise of the screw ventilation 13 of present embodiment by curve Na.Fig. 7 is change second
The combination (D2a-D2b-D2c) of depth dimensions D2a, D2b, D2c of recess 45b, and to become the air-supply being substantially the same
The mode of amount regulates rotating speed and is measured.
And, Fig. 7 be transverse axis take the second recess 45b when the contour line of trailing edge portion 42c is set to α depth dimensions D2a,
The combination (D2a-D2b-D2c) of D2b, D2c, the longitudinal axis takes level of noise dB (A) when screw ventilation 13 rotates, and comes
Represent its relativeness.
For the air-supply level of noise of screw ventilation 13, at depth dimensions D2a, D2b, D2c of trailing edge portion 42c
Combination (D2a-D2b-D2c) be (35-30-25), i.e. depth dimensions D2a be 35mm, depth dimensions D2b be 30mm,
When depth dimensions D2c is 25mm, air-supply level of noise such as be about 42dB and minimum.On the other hand, the propeller of comparative example
Formula blower fan 100, i.e. the air-supply of the screw ventilation 100 having an arc-shaped recess 105 at trailing edge portion 102c is made an uproar
Value is about 44dB (A).
It addition, in screw ventilation 13, when make the combination (D2a-D2b-D2c) of depth dimensions D2a, D2b, D2c by
(35-30-25), when being gradually reduced or increase, air-supply level of noise gradually uprises.
And, the combination (D2a-D2b-D2c) at depth dimensions D2a, D2b, D2c is in (20-15-10) to (45-40-35)
Scope, and the difference of depth dimensions D2a, D2b, D2c is essentially in the case of 5mm, and air-supply level of noise is about
In or less than 43.5dB (A), it is possible to the air-supply level of noise the most about 44dB (A) of relatively comparative example reduces air-supply noise.
It follows that the relation of screw ventilation 13 with bellmouth 28 is illustrated.
Fig. 8 is the vertical profile of screw ventilation and the belled size relationship conceptually representing embodiment of the present utility model
Face figure.
As shown in Figure 8, the off-premises station 2 as the heat source unit of present embodiment possesses: framework 11, houses screw ventilation
13, and there is blow-off outlet 27；And bellmouth 28, surround screw ventilation 13, to produced by screw ventilation 13
The flowing of air guides, so that air blows out to framework 11 from blow-off outlet 27.
Herein, by the end i.e. front end 28a of the front end P2 of trailing edge portion 42c Yu outdoor heat converter 12 side of bellmouth 28
Distance be set to the first distance L1, by position D2 the deepest for the degree of depth of the second recess 45bmaxWith the front end 28a's of bellmouth 28
Distance is set to second distance L2.
It addition, the front end P2 of trailing edge portion 42c is equivalent to the most illustrated and from wheel hub 41 central point O guides oar into
The intersection point P2 of the tangent line of the contour line that is second cam profile α 5 of leaf 42 most peripheral side.And, the degree of depth of the second recess 45b is
Deep position D2maxThe depth dimensions D2 being equivalent to the second recess 45b reaches the position of maximum.
Fig. 9 is the first distance L1 in the screw ventilation representing present embodiment and the ratio of second distance L2 and motor
The experimental data of relation of input.
Sometimes (second distance L2) ÷ (the first distance L1) is referred to as " distance is than (L2/L1) " it addition, following.
As it is shown in figure 9, the screw ventilation 13 of present embodiment with in the combination of bellmouth 28, when by distance than (L2/L1)
When the input of the motor 15 when=0.3 is set to " 1 ", according to distance than (L2/L1)=0.3 to distance than (L2/L1)=0.8 time
Experimental result it will be appreciated that: at the scope (model in Fig. 9 of 0.4≤(second distance L2) ÷ (the first distance L1)≤0.75
Enclose A1) in, the input of motor 15 is less than about 0.992, at 0.57≤(second distance L2) ÷ (the first distance L1)
In the scope (scope A2 in Fig. 9) of≤0.7, the input of motor 15 is less than about 0.96.
According to this result, inventor finds: at least one blade 42 in multiple blades 42, by the first distance L1 and the
The relation of two distances L2 is set as the scope of 0.4≤(second distance L2) ÷ (the first distance L1)≤0.75, thereby, it is possible to
Air is made to flow out from screw ventilation 13 efficiently, thus reduce the motor 15 of driving screw ventilation 13 rotation
Input.
And, inventor finds: at least one blade 42 in multiple blades 42, by the first distance L1 and second distance
The relation of L2 is set as the scope of 0.57≤(second distance L2) ÷ (the first distance L1)≤0.7, thereby, it is possible to more effectively
Make to rate air flow out from screw ventilation 13, thus reduce the motor 15 driving screw ventilation 13 to rotate further
Input.
The screw ventilation 13 of present embodiment and as in the off-premises station 2 of heat source unit, the trailing edge portion 42c of blade 42
Have 2 groups or more than 2 groups, using recess 45 and protuberance 46 as the outline portion 47 of 1 group such that it is able to when it rotates
Reduce the air-supply noise produced because of the wake flow vortex of each blade 42, and can do one's utmost to ensure the area of blade 42 relatively big and
Avoiding air quantity to decline, described recess 45 is the outflow direction bent recess inversely with air, and described protuberance 46 is and recess 45
Outer circumferential side be connected and towards the outflow direction of air.
And, the screw ventilation 13 of present embodiment and as in the off-premises station 2 of heat source unit, it is arranged in outside blade 42
The second recess 45b contained in second outline portion 47b of all sides is more than the first profile part 47a being arranged in blade 42 inner circumferential side
The first recess 45a contained by, thereby, it is possible to the outer circumferential side at the higher blade of flow velocity 42 of air plays the second recess 45b
Reducing effect to air-supply noise.This can also suppress trailing edge portion 42c outer circumferential side and bellmouth 28 at blade 42 effectively
Between produce vortex.
And then, the screw ventilation 13 of present embodiment and as in the off-premises station 2 of heat source unit, have at the first recess 45a
Have the profile of curve with Straight Combination, at the second recess 45b, there is curved profile, and make the second recess 45b's
Contour line length is longer than the first recess 45a, thereby, it is possible to make the sky that the inner circumferential side of the trailing edge portion 42c from blade 42 blows out
The direction of flow of air is different from the direction of the air flowing that the outer circumferential side of the trailing edge portion 42c from blade 42 blows out, it is thus possible to
The interference of enough suppression flowings, reduces air-supply noise.
And then, the screw ventilation 13 of present embodiment and as in the off-premises station 2 of heat source unit, by making recess 45
Depth dimensions is different in each blade 42 of multiple blades 42, it is possible to make because of (blade 42A and blade between each blade 42
Between 42B, between blade 42B and blade 42C, between blade 42C and blade 42A) leaf that causes of the pressure oscillation that produces
The generation cycle of sheet pitch bell staggers such that it is able to reduce air-supply noise.
And, the screw ventilation 13 of present embodiment and as in the off-premises station 2 of heat source unit, between multiple blades 42
The depth dimensions of the first recess 45a is set as identical, and makes the depth dimensions D2 of the second recess 45b at multiple blades 42
In each blade 42 different, thereby, it is possible to reduce because of air-supply noise produced by the wake flow vortex of each blade 42 when it rotates,
And can do one's utmost to ensure the area of blade 42 relatively big and avoid air quantity to decline.
In the off-premises station 2 as heat source unit of present embodiment, at least one blade 42 in multiple blades 42, will
First distance L1 is set as 0.4≤(second distance L2) ÷'s (the first distance L1)≤0.75 with the relation of second distance L2
Scope, thereby, it is possible to make air flow out from screw ventilation 13 efficiently such that it is able to reduces and drives screw ventilation
The input of 13 motor 15 rotated.
And, at least one blade 42 in the off-premises station 2 as heat source unit of present embodiment, in multiple blades 42
In, the relation of the first distance L1 Yu second distance L2 is set as 0.57≤(second distance L2) ÷ (the first distance L1)≤0.7
Scope, thereby, it is possible to efficiently make air flow out from screw ventilation 13 such that it is able to reduce further and drive spiral shell
The input of the motor 15 that rotary propeller type blower fan 13 rotates.
Therefore, the screw ventilation 13 according to present embodiment and the off-premises station 2 of the air conditioner 1 as heat source unit, it is possible to
Take into account the reducing effect of air-supply noise and avoid air quantity to decline.
Some embodiments of the present utility model are illustrated, but these embodiments are only and illustrate, it is not intended to limit real
By novel scope.These embodiments can be implemented with other various forms, at the model of the purport without departing from utility model
In enclosing, it is possible to carry out various omission, replace, change.These embodiments and deformation thereof are included in scope and the master of utility model
In purport, and it is included in the scope of the utility model described in technical scheme and equalization thereof.
Claims (7)
1. a screw ventilation, it is characterised in that including:
Wheel hub, is arranged in central authorities；And
Multiple blades, are arranged on around wheel hub,
The trailing edge portion of the plurality of blade have 2 groups or more than 2 groups, using recess and protuberance as the outline portion of 1 group,
Described recess is throughout the inner circumferential side of blade to outer circumferential side, and the outflow direction bent recess inversely of air, described protuberance be with
The outer circumferential side of described recess is connected, and towards the outflow direction of air,
Make to be arranged in the described outline portion of described blade outer circumferential side the depth dimensions of the second contained recess, more than being arranged in institute
State the depth dimensions of the first recess contained in the described outline portion of blade inner circumferential side.
Screw ventilation the most according to claim 1, it is characterised in that
Described first recess has the profile of curve with Straight Combination,
Described second recess has curved profile,
The contour line length of described second recess is longer than the contour line length of described first recess.
Screw ventilation the most according to claim 1 and 2, it is characterised in that
The depth dimensions of described recess is different in each blade of the plurality of blade.
Screw ventilation the most according to claim 1 and 2, it is characterised in that
The depth dimensions of described first recess is identical between the plurality of blade,
The depth dimensions of described second recess is different in each blade of the plurality of blade.
5. a heat source unit, it is characterised in that including:
Screw ventilation according to any one of claim 1 to 4；And
Heat exchanger, carries out heat exchange with the air flowed by described screw ventilation.
Heat source unit the most according to claim 5, it is characterised in that including:
Framework, houses described screw ventilation, and has blow-off outlet；And
Bellmouth, surrounds described screw ventilation, guides the flowing of air produced by described screw ventilation,
So that air is from described blow-off outlet blowout to framework,
In at least one blade in the plurality of blade, the of the front end in described trailing edge portion and described belled front end
The deepest position of the degree of depth of one distance L1 and described second recess with the relation of the second distance L2 of described bellmouth front end is
0.4≤(second distance L2) ÷ (the first distance L1)≤0.75.
Heat source unit the most according to claim 5, it is characterised in that including:
Framework, houses described screw ventilation, and has blow-off outlet；And
Bellmouth, surrounds described screw ventilation, guides the flowing of air produced by described screw ventilation,
So that air is from described blow-off outlet blowout to framework,
In at least one blade in the plurality of blade, the of the front end in described trailing edge portion and described belled front end
The deepest position of the degree of depth of one distance L1 and described second recess with the relation of the second distance L2 of described bellmouth front end is
0.57≤(second distance L2) ÷ (the first distance L1)≤0.7.
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2015-041406 | 2015-03-03 | ||
| JP2015041406 | 2015-03-03 | ||
| JP2015253713A JP6592358B2 (en) | 2015-03-03 | 2015-12-25 | Propeller fan and heat source unit |
| JP2015-253713 | 2015-12-25 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205503552U true CN205503552U (en) | 2016-08-24 |
Family
ID=56725935
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620148601.1U Active CN205503552U (en) | 2015-03-03 | 2016-02-26 | Propeller type fan and heat source unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205503552U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110573746A (en) * | 2017-04-28 | 2019-12-13 | 三菱电机株式会社 | Propeller fan |
-
2016
- 2016-02-26 CN CN201620148601.1U patent/CN205503552U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110573746A (en) * | 2017-04-28 | 2019-12-13 | 三菱电机株式会社 | Propeller fan |
| CN110573746B (en) * | 2017-04-28 | 2021-01-08 | 三菱电机株式会社 | Propeller fan |
| US11149551B2 (en) | 2017-04-28 | 2021-10-19 | Mitsubishi Electric Corporation | Propeller fan |
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