CN1221766C - Outdoor unit of air conditioner - Google Patents
Outdoor unit of air conditioner Download PDFInfo
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- CN1221766C CN1221766C CN 02107514 CN02107514A CN1221766C CN 1221766 C CN1221766 C CN 1221766C CN 02107514 CN02107514 CN 02107514 CN 02107514 A CN02107514 A CN 02107514A CN 1221766 C CN1221766 C CN 1221766C
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Abstract
The outdoor unit 30 for air conditioner comprises a heat exchanger 2 and a propeller fan 6 disposed in the housing 1 provided with a safety protective grill 20 comprising a radial crosspiece 8 and a concentric circular crosspiece 9. The safety protective grill 20 comprises the radial crosspiece 8 having a specified curvature in the cross-section, and the concentric circular crosspiece 9 arranged in zigzag in the radial direction of the propeller fan 6.
Description
Technical field
(air-conditioner of パ Star ケ-ジ) particularly relates to the fan security protection grid that is used for off-premises station to the present invention relates to a kind of indoor (Le-system) air-conditioner or combination.
Background technology
In outdoor unit of air conditioner, the requirement of economize on electricityization is improved constantly, as one of them means, have high air quantityization, the high efficiency of off-premises station.Yet, because high air quantityization increases noise, so, high air quantity, high efficiency and low noise fan have been proposed demand.
Generally speaking, as the air-conditioner outdoor fan, be extensive use of propeller type fan.Propeller type fan is by constituting at the peripheral part of wheel hub configuration blade, can utilize the lift air-supply of the blade that revolution produces.At this moment, blowing out the propeller type fan outer circumferential side of side, nearby comparing, towards increasing with the rotating rotating flow of the revolution equidirectional of fan with wheel hub.This rotating flow as do not turn to into axial mobile be axial flow, the then dynamic pressure loss of energy, the aerodynamic performance of propeller type fan descends, simultaneously, rotating flow impacts the security protection grid, noise and fluid loss increase.Here, the security protection grid is used to prevent to point contact or foreign matter and invades the linear grid that the accident that causes takes place for the side that blows out of being located at propeller type fan in outdoor unit of air conditioner.
In off-premises station, thereby can reclaim the structure that increases air quantity as static pressure as the dynamic pressure that rotating flow had that will flow out from the propeller type fan that blows out side, the technology of Japanese kokai publication sho 60-62567 communique (citing document 1), Japanese kokai publication sho 60-62693 communique (citing document 2) record is for example arranged.Generally speaking, for propeller type fan, blow out side in order to prevent accident at above-mentioned propeller type fan, installed in the above-mentioned citing document 1 and have the security protection grid that extends into radial, citing document 2 has been installed by the bar that is configured to concentric circles and has been extended into the trellised security protection grid of radial bar shaped.
In the technology of citing document 1 record, owing to the bar that is not configured to concentric circles at the security protection grid of propeller type fan, so, enter from the outside in order to prevent foreign matter, need much extend into radial.For this reason, loss and the noise of rotating flow by the security protection grid time from helical fan all increases.
In addition, in the technology of citing document 2 records, the security protection grid is by the bar of concentric circles and extend into radial and form clathrate, but the relative gyroaxis direction of this clathrate bar is extended abreast towards downstream, so, can not make rotating flow towards the gyroaxis directional steering, the problem that exists the dynamic pressure loss of energy, aerodynamic performance to descend.
Summary of the invention
The present invention makes in order to solve above-mentioned prior art problems point, its purpose is to provide a kind of outdoor unit of air conditioner, the fan of this outdoor unit of air conditioner can reclaim the dynamic pressure of rotating flow as static pressure, thereby make the fan high efficiency, reduce the motor input power, simultaneously, be reduced in the loss of security protection grid, even do not increase noise for high air quantity yet, this outdoor unit of air conditioner is compared with existing outdoor unit of air conditioner, can realize high air quantityization, economize on electricityization, low noiseization.
A kind of outdoor unit of air conditioner of the present invention, at the internal configurations heat exchanger and the propeller type fan of casing, simultaneously, the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with above-mentioned propeller type fan; It is characterized in that: above-mentioned radial along having on the section of fan rotation axis line direction and blowing out the corresponding regulation curvature of angle at 70～80% position air stream of the external diameter of described propeller fan.
In order to achieve the above object, outdoor unit of air conditioner of the present invention is at the internal configurations heat exchanger and the fan of casing, simultaneously, and the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with said fans; It is characterized in that: above-mentioned radial section has regulation curvature.
A kind of outdoor unit of air conditioner of the present invention, at the internal configurations heat exchanger and the propeller type fan of casing, simultaneously, the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with above-mentioned propeller type fan; It is characterized in that: above-mentioned radial on 70～80% position of the external diameter of described propeller fan with blow out angle correspondingly has regulation on section curvature.
Another outdoor unit of air conditioner of the present invention is at the internal configurations heat exchanger and the fan of casing, simultaneously, and the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with said fans; It is characterized in that: above-mentioned concentric circles bar becomes staggered along the arranged radially of said fans.
A kind of outdoor unit of air conditioner of the present invention, at the internal configurations heat exchanger and the propeller type fan of casing, simultaneously, the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with above-mentioned propeller type fan; It is characterized in that: above-mentioned security protection grid by on 70～80% position of the external diameter of described propeller fan with blow out angle and correspondingly on section, have radial of regulation curvature and become staggered concentric circles bar to constitute with arranged radially along said fans.
Another outdoor unit of air conditioner of the present invention is at the internal configurations heat exchanger and the fan of casing, simultaneously, and the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with said fans; It is characterized in that: above-mentioned security protection grid is had radial of regulation curvature and becomes staggered concentric circles bar to constitute with arranged radially along said fans by section.
Another outdoor unit of air conditioner of the present invention is at the internal configurations heat exchanger and the fan of casing, simultaneously, and the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with said fans; It is characterized in that: the downstream in said fans is provided with guide ring, a plurality of rotating flow control panels of configuration in this guide ring.
Description of drawings
Fig. 1 is the side sectional drawing of the outdoor unit of air conditioner of an embodiment of the present invention.
Fig. 2 is the outside drawing of the outdoor unit of air conditioner of Fig. 1.
Fig. 3 is the key diagram of air stream of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention.
Fig. 4 is the rotating flow of air stream of security protection grid of outdoor unit of air conditioner of an embodiment of the present invention and the key diagram of axial flow.
Fig. 5 is in the expansion key diagram of the barrel surface of predetermined radius for the relative propeller type fan axis of rotation of the outdoor unit of air conditioner of an embodiment of the present invention.
Fig. 6 is the performance plot of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention.
Fig. 7 is another performance plot of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention.
Fig. 8 is the key diagram of the modified example of outdoor unit of air conditioner of the present invention.
Fig. 9 is the key diagram of another modified example of outdoor unit of air conditioner of the present invention.
The specific embodiment
Below with reference to Fig. 1-Fig. 9 form of implementation of the present invention is described.
Fig. 1 is the side sectional drawing of the outdoor unit of air conditioner of an embodiment of the present invention, and Fig. 2 is the outside drawing of the outdoor unit of air conditioner of Fig. 1.Fig. 2 (a) is the front elevation that side is watched that blows out from the off-premises station of Fig. 1, and Fig. 2 (b) is the perspective view that side is watched that blows out from the off-premises station of Fig. 1.In this form of implementation, the form of implementation of fan for the general propeller type fan that uses is described.
As shown in Figure 1, accommodate at the casing 1 of off-premises station 30 and be used for flowing through the hot media in the heat-transfer pipe and flow through heat exchanger 2, the propeller type fan 6 of being located at the downstream position of this heat exchanger 2, the guide ring that blows out side 4 of being located at this propeller type fan 6 that carry out heat exchange between the air outside the heat-transfer pipe, be located at and the security protection grid 20 of above-mentioned propeller type fan 6 position in opposite directions, and electric control portion 5.
The wheel hub 6a of propeller type fan 6 is connected in the driving shaft by the fan motor 3 of motor stay 7 supportings.Wheel hub 6a at propeller type fan 6 is provided with blade 6b.When 3 revolutions of said fans motor, above-mentioned propeller type fan 6 revolutions are blown from blow-off outlet.For the shape of this blow-off outlet, though illustrate, because above-mentioned propeller type fan 6 is circular, so, the projection of shape of propeller type fan 6 is carried out profiling, form the circle identical substantially with the external diameter of this propeller type fan 6.At the annulus frame member 11 of this blow-off outlet by being located at its outer edge the security protection grid 20 that is made of radial 8 and concentric circles bar 9 etc. is installed, so that this security protection grid 20 is strengthened.Said motor stay 7 forms the minimum shape of the pressure loss that makes from the air stream of above-mentioned heat exchanger 2.
As shown in Figure 1 and Figure 2, the section of security protection grid 20 has the curvature of regulation, and, constitute the clathrate member by a plurality of radial 8 and a plurality of concentric circles bars 9, this radial 8 central component 10 that is disposed at relatively with the wheel hub 6a position in opposite directions of above-mentioned propeller type fan extends into radial, the center configuration of the above-mentioned relatively central component 10 of this concentric circles bar 9 becomes concentric circles ground and this radial 8 combination, and radially interconnected towards propeller type fan 6.
Radial the 8 a plurality of plate bodys that have regulation curvature by section (are called foline, it is long to be called chord of foil along its length with section of regulation curvature) constitute, so that the rotary air that blows out from propeller type fan 6 stream is towards axially turning to, the dynamic pressure that this rotary air stream is had can be transformed into static energy and be reclaimed.
For the regulation curvature of foline, make the curvature of foline leading section of large percentage of the rotary air stream that blows out from propeller type fan 6 less, it is bigger to make above-mentioned rotary air stream become the curvature of base portion of above-mentioned foline of large percentage of axial flow.In addition, though detailed content illustrates in the back, but the position that in fact forms the air mass flow maximum that blows out with above-mentioned propeller type fan 6 is near the corresponding certain curvature of blow out air stream angle of propeller type fan 6 external diameter 70-80% of the inflow axial velocity maximum of rotary air stream, also can obtain good result.
Be installed in for radial 8 and be located at the annulus frame member 11 that the guide ring ground that is installed to the blow-off outlet of being located at propeller type fan 6 with the central component 10 of the cardinal principle circle of the wheel hub position in opposite directions of propeller type fan 6 and casing 1 is provided with.In addition, above-mentioned annulus frame member 11 is used to strengthen above-mentioned radial 8, above-mentioned central component 10 not only is used to strengthen above-mentioned radial 8, and the inboard that also has the security protection grid on the axis of rotation extended line that prevents propeller type fan 6 becomes negative pressure and makes the air that blows out from propeller type fan 6 flow the effect of flowing backwards.
Concentric circles bar 9 at upstream side in order to reduce its wind-force resistance, have fillet ground at leading section and form (following occasion be called simply have fillet) at the concentric circles bar, be formed in the downstream by metal pattern and make the projection 13 (aftermentioned) that the occasion of these concentric circles bar 9 grades forms, be combined to radial 8, and the bar that will adjoin each other is configured to staggered orthogonal.
Radiation lines of the present invention are being used as radial 8 the occasion that makes up with concentric circles bar 9, above-mentioned concentric circles bar 9 is inserted upstream side position (following title upstream side) and position, downstream (to call the downstream in the following text) that the logical air from propeller type fan 6 that is arranged at this section flows with above-mentioned radial 8 the section orthogonal ground with regulation curvature, constitutes staggered.
Radial 8 occasion of using simple pole stock in combinations thereof, the axis of rotation direction orthogonal of above-mentioned concentric circles bar 9 and propeller type fan 6 and alternately be configured in radial 8 upstream side and the downstream that is made of above-mentioned pole stock constitutes staggered.
By such formation, with the axis of rotation direction orthogonal ground of existing relative simply propeller type fan 6 parallel be disposed at the concentric circles bar on the one side compare the loss less.
In addition, the outer circumferential side of radial 8 foline (guide ring 4 sides) becomes the formation that prolongs towards the upstream side of propeller type fan 6.That is, compare with interior all sides, it is big that the size of depth direction becomes.Like this, in the occasion that does not have this prolongation,, can produce rotating flow in this space though between guide ring 4 and security protection grid 20, form the space.In the present embodiment, because above-mentioned extension is set, so even for the diameter bigger than the external diameter of this propeller type fan 6, also the dynamic pressure that the rotating flow that above-mentioned propeller type fan 6 forms can be had can be reclaimed with good efficiency as static pressure.In addition,, can reduce the speed that flows into security protection grid 20 from above-mentioned propeller type fan 6 because above-mentioned space enlarges the flow path area of propeller type fan 6, so, noise can be reduced.
At security protection grid 20, can make radial 8, central component 10, annulus frame member 11, concentric circles bar 9 become one drip molding, this integrally formed blow-off outlet that is installed in the propeller type fan 6 of being located at casing 1.In addition, concentric circles bar 9, radial 8, central component 10, annulus frame member 11 also can be formed separately.
Below, the projection of staggered concentric circles bar is described with reference to Fig. 3.Fig. 3 is the key diagram of air stream of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention, Fig. 3 (a) is the side sectional drawing of a form of implementation of outdoor unit of air conditioner of the present invention, the key diagram of the air rheologyization that Fig. 3 (b) causes for the projection on the concentric circles bar of the outdoor unit of air conditioner of prior art, Fig. 3 (c) is the key diagram that is configured to the air that the convexes to form stream on the staggered concentric circles bar of Fig. 3 (a).
Shown in Fig. 3 (a), constitute concentric circles bar 9 and radial 8 in one, be positioned at its central authorities and to its central component that supports 10 and be positioned at the occasion of the annulus frame member 11 that is used to strengthen of the outer edge side of above-mentioned radial 8 and concentric circles bar 9, when making, form protruding 13 by metal pattern.
In the prior art, shown in Fig. 3 (b), considering that outward appearance is formed on projection 13 can not be from the upstream side of the concentric circles bar of seeing previously 9 of security protection grid 20.In the present invention, like that, above-mentioned protruding 13 be formed on can be from the downstream of the concentric circles bar of seeing previously 9 of security protection grid 20 shown in Fig. 3 (c).Above-mentioned protruding 13 can formed by metal pattern integral production concentric circles bar 9, radial 8, the occasion of central component 10, annulus frame member 11, also can form in interior occasion of partly being made by metal pattern comprising the concentric circles bar.
Below, be the explanation action of the outdoor unit of air conditioner of formation like this in center with reference to Fig. 1, Fig. 2, Fig. 3 with the security protection grid.
At first, the mobile variation during particularly by concentric circles bar 9 by security protection grid 20 of the fluid that blows out from propeller type fan 6 is described.
Shown in Fig. 1, Fig. 2 (a), Fig. 2 (b), when off-premises station 30 made propeller type fan 6 courts be turned round by clockwise direction shown in the solid arrow Q in the driving by fan motor 3, air was inhaled into the heat exchanger 2 in the off-premises station 30, carries out blowing out after the heat exchange.The air that blows out is inhaled into propeller type fan 6.Above-mentioned propeller type fan 6 comparatively safe protective grille blow out this inhaled air stream.Like this, air from the left of solid arrow P to flowing towards right.
Such shown in Fig. 3 (a), Fig. 3 (b), Fig. 3 (c), on concentric circles bar 9 relatively from the left that blows out to flowing towards the right flow air, at this moment, concentric circles bar 9 at Fig. 3 of prior art (b), because the projection 13 that forms during with these concentric circles bar 9 grades of the integrated making of metal pattern is in the upstream side of above-mentioned concentric circles bar 9, so the air flow circuit that above-mentioned concentric circles bar is 9 diminishes, its flow path width b narrows down.For the concentric circles bar 9 of Fig. 3 of the present invention (c), because above-mentioned protruding 13 downstreams that are in above-mentioned concentric circles bar 9, so, can increase the air flow circuit of 9 of this concentric circles bars of adjacency, so this flow path width b broadens.
In Fig. 3 of prior art (b) is shown, projection 13 upstream sides at concentric circles bar 9, cause peeling off on the surface of this concentric circles bar 9 from the air stream of propeller type fan 6, the stripping area S that illustrates above-mentioned concentric circles bar 9 downstreams becomes big, and air flow circuit narrows down by the flow path width b of area.
Like that, by projection 13 being constituted segmentation shape backward, thereby the stripping area S from the air stream of propeller type fan 6 diminishes on the surface of concentric circles bar 9, can increase the flow path width b that air flow circuit passes through area shown in Fig. 3 (c) in the present invention.
In the occasion of the same air quantity of supposition by both security protection grids 20, become staggered concentric circles bar 9 for the arranged radially along propeller type fan 6 of the present invention, compare with the existing concentric circles bar 9 that is arranged in parallel, it is big that flow path width b becomes, thereby speed is correspondingly reduced.The pressure loss of above-mentioned concentric circles bar 9 is because proportional with about 2 powers of wind speed, so, become staggered by radial arrangement along propeller type fan 6, can reduce energy loss at the security protection grid, increase air quantity.
In addition, by staggered, can when impacting above-mentioned concentric circles bar 9, the air that blows out from above-mentioned propeller type fan 6 stream change the phase place of time along radially concentric circles bar 9 being arranged in of propeller type fan 6.Like this, can reduce the noise of discrete frequency composition.
Below, flow into security protection grid 20 with reference to Fig. 4 explanation from propeller type fan 6 and particularly flow into radial 8 the rotating flow of air stream and the relation of axial flow.Fig. 4 is the rotating flow of air stream of security protection grid of outdoor unit of air conditioner of an embodiment of the present invention and the key diagram of axial flow, Fig. 4 (a) is the air stream of the security protection grid that flow into outdoor unit of air conditioner of the present invention and the key diagram of the relation of axial flow, and Fig. 4 (b) is the A-A sectional drawing of Fig. 4 (a).
Shown in Fig. 4 (a), have radial 8 of regulation curvature, and the security protection grid that becomes staggered concentric circles bar 9 etc. to constitute along the arranged radially of propeller type fan 6, Cm in the configuration of the downstream of propeller type fan 6 by the guide ring 4 that the air stream that blows out from this propeller type fan 6 is guided, the section that imports this air that blows out stream
1The distribution of the inflow axial flow speed that flow into security protection grid 20 is shown.The axis of rotation direction of the above-mentioned relatively propeller type fan 6 of this leaked-in air stream is parallel, and its air quantity becomes maximum at the 70-80% place of the external diameter of above-mentioned propeller type fan 6.Therefore, also can make radial 8 the regulation curvature of section corresponding with this point.
Shown in Fig. 4 (b), Cu
1Be of the distribution of propeller type fan 6 courts by the inflow rotary speed that flow into the security protection grid of the rotating occasion of clockwise direction shown in the solid arrow Q.In the propeller type fan 6 that has carried out optimal design, the diameter of rotary speed and propeller type fan 6 becomes greatly pro rata, sharply diminishes to guide ring 4 from the external diameter end of above-mentioned propeller type fan 6.This Cm
1With Cu
1Vector sum become the inflow velocity C that flow into security protection grid 20
1(with reference to Fig. 5).
Flow into axial flow speed Cm
1Be the speed relevant, but flow into rotary speed Cu with air quantity
1Because for meeting at right angles, the gyroaxis direction of relative propeller type fan 6 is circumferential composition, so, irrelevant with air quantity, only be to make the air rotation.When its not successfully when axially turning to, the produce power loss.In the downstream of propeller type fan 6, the dynamic pressure that this rotation composition has can produce loss, so, cause the decrease in efficiency of fan.
Below, the rotating flow that the air that is produced by propeller type fan 6 with reference to Fig. 5 explanation flows and the conversion of axial flow.Fig. 5 is in the expansion key diagram of the barrel surface of predetermined radius for the relative propeller type fan axis of rotation of the outdoor unit of air conditioner of an embodiment of the present invention.Fig. 5 (a) is the B-B sectional drawing of Fig. 4 (a), and Fig. 5 (b) is the C-C sectional drawing of Fig. 4 (a).Shown in Fig. 5 (a), 5 (b), to the upstream side indexing 1 of security protection grid 20, to downstream indexing 2.
Shown in Fig. 5 (a), from flowing promptly that rotating propeller type fan 6 blows out towards radial 8 inflow velocity C
1The downstream direction of the gyroaxis of propeller type fan 6 forms β relatively
1The angle of (fluid inlet angle) is divided into the axial flow speed Cm of the downstream direction of the gyroaxis that flow into above-mentioned propeller type fan 6
1Rotary speed Cu with the gyratory directions that flow into propeller type fan 6
1The vectorial composition of such 2 directions.
In the downstream of propeller type fan 6, radial 8 section has the curvature of regulation.For example, position air quantity at the 70-80% of the external diameter of above-mentioned propeller type fan 6 becomes maximum, so, above-mentioned section have with the air of above-mentioned position stream blow out the corresponding curvature of angle, the axis direction of above-mentioned relatively propeller type fan 6 extends into radial, at this moment, chord of foil is long is L1.
In this occasion, rotating flow Cu
2Rotating flow Cu with upstream side
1Comparing can be less, so, by dynamic pressure can be reclaimed as static pressure, thereby can realize high air quantityization.As shown in Figure 5,9
1, 9
2The upstream side that is disposed at radial 8, the staggered concentric circles bar in downstream are shown.
In addition, by Fig. 5 (b) of the outer circumferential side of the external diameter that is in propeller type fan 6 as can be known, as Fig. 4 (b) also illustrates, at the periphery of propeller type fan 6 rotating flow Cu nearby
1Be maximum, and axial flow speed Cm
1Less, so, big at the outer circumferential side dynamic pressure loss of energy of propeller type fan 6.
Therefore, the outer circumferential side at the external diameter of propeller type fan 6 makes radial 8 section with regulation curvature extend to upstream side, specifically, makes that the long L1 of chord of foil is elongated to be L2.As a result, on the blade face of foline, rotating flow Cu
1Slow down axial flow speed Cm lentamente
1Speedup lentamente, thus can be efficiently with rotating flow Cu
1Dynamic pressure can be recovered as static pressure, so, can realize high air quantityization.
Characteristic below with reference to the outdoor unit of air conditioner of Fig. 6, Fig. 7 comparative descriptions outdoor unit of air conditioner of the present invention and prior art.Fig. 6 is the performance plot of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention, and Fig. 7 is another performance plot of security protection grid of the outdoor unit of air conditioner of an embodiment of the present invention.
Here, the required each several part of the explanation of Fig. 6 is described.
As shown in Figure 1, L0 represents the axial depth size of concentric circles bar 9, and t is configured to the blowing out between the side end face along the axial size of the revolution of propeller type fan 6 of staggered concentric circles bar 9.
As shown in Figure 6, transverse axis illustrates the ratio of the relative L0 of t, and the outdoor unit of air conditioner that the longitudinal axis illustrates with prior art is air quantity ratio, the noise ratio of the outdoor unit of air conditioner of the present invention of benchmark.Fig. 6 (a) illustrates the outdoor unit of air conditioner of prior art and the air quantity ratio of outdoor unit of air conditioner of the present invention, and Fig. 6 (b) illustrates the noise ratio of the outdoor unit of air conditioner and the outdoor unit of air conditioner of the present invention of prior art.
Make the rotating speed of propeller type fan 6 for certain here.Q is the air quantity of outdoor unit of air conditioner of the present invention, Q
0Be the air quantity of the outdoor unit of air conditioner of prior art, SL is the noise of outdoor unit of air conditioner of the present invention, SL
0Noise for the outdoor unit of air conditioner of prior art.
In the outdoor unit of air conditioner of prior art, staggered owing to not being arranged in, so, t=0, therefore, t/L0=0.As shown in the figure, zero among the figure is the air quantity Q of the outdoor unit of air conditioner of prior art
0● be the air quantity Q of the outdoor unit of air conditioner of the air quantity Q of outdoor unit of air conditioner of the present invention and prior art
0The ratio.Noise ratio compares too with air quantity.Fig. 6 is illustrated in the staggered interval that makes concentric circles in the security protection grid of outdoor unit of air conditioner of the present invention and changes the effect that is produced as parameter than t/L0.
Shown in Fig. 6 (a) and (b), in the occasion that t/L0 increases, air quantity presents the tendency that noise ratio descends than increasing.As can be seen, when t/L0=2.0, the effect more about 0.6% than increasing, that noise ratio descends about 0.55dB that has air quantity, when t/L0＞2.0, effect is saturated basically and become necessarily.Yet, when t/L0＞2.0, because foreign matters such as finger are easy to enter from the outside, so, inappropriate from the safety consideration.That is, importantly, surpass 0 at the ratio t/L0 of the axial dimension t that is configured to staggered concentric circles bar 9 that blows out the side end face and the axial depth size L0 of concentric circles bar 9, below 2.0.
In Fig. 7, the frequency characteristic of the noise when the same air quantity of the present invention and prior art example is shown.
In Fig. 7, transverse axis illustrates frequency, and the longitudinal axis illustrates the relative noise level.Fine rule is the relative noise level of the outdoor unit of air conditioner of prior art, and thick line is the relative noise level of outdoor unit of air conditioner of the present invention.By implementing the present invention, can reduce the noise level of blade sound and its high order of frequency.This means and to reduce acoustically unhappy discrete frequency sound (extraordinary noise).
The modified example of outdoor unit of air conditioner of the present invention is described below with reference to Fig. 8.Fig. 8 is the key diagram of the modified example of outdoor unit of air conditioner of the present invention.In this modified example, be identical components, identical formation with the propeller type fan 6 of Fig. 1 form of implementation and the central component 10 that forms radial 8 of security protection grid 20, concentric circles bar 9 and strengthen usefulness.Its difference is, replaces being located at the annulus frame member 11 of security protection grid 20 outer edges with the square box member 14 in four directions.Be that the center describes with this difference below.
The characteristic of difference is, compares with the outdoor unit of air conditioner of Fig. 2 (a), blows out area when having increased the security protection grid 20 of the outdoor unit of air conditioner of watching Fig. 8 from the downstream.By increasing the above-mentioned area that blows out, can reduce the resistance that 20 pairs of air that blow out from propeller type fan 6 of security protection grid flow, can reduce the loss, so, can realize high air quantityization.
In addition, blow out area by increase, can reduce to impact and have radial 8 of regulation curvature and be arranged in air quantity staggered concentric circles bar 9, that blow out from propeller type fan 6 at section, so, the noise that produces from security protection grid 20 can further be reduced.
Another modified example of outdoor unit of air conditioner of the present invention is described below with reference to Fig. 9.Fig. 9 is the key diagram of another modified example of outdoor unit of air conditioner of the present invention.Fig. 9 (a) is the side view of another modified example of outdoor unit of air conditioner of the present invention, and Fig. 9 (b) is an expanded view of the D-D section of figure (a), and Fig. 9 (c) is another expanded view of the D-D section of Fig. 9 (a).
Shown in Fig. 9 (a), central component 10, annulus frame member 11 that the propeller type fan 6 of Fig. 1 form of implementation and form radial 8 of security protection grid 20, concentric circles bar 9 and is strengthened usefulness use identical formation, identical components in embodiments of the present invention.Its difference is, shown in Fig. 9 (b), Fig. 9 (c) like that, above-mentioned propeller type fan 6 blow out side configuration guide ring 4, the side that blows out in guide ring 4 disposes a plurality of rotating flow control panels 15 with respect to the gyratory directions Q of propeller type fan 6.Be that the center describes with this difference below.
In Fig. 9 (b), it is characterized in that rotating flow control panel 15 is a plate body, blowing out in guide ring 4 is side a plurality of with gyratory directions Q propeller type fan 6 position configuration in opposite directions.Above-mentioned rotating flow control panel 15 can reclaim the dynamic pressure that the rotating flow of propeller type fan 6 has as static pressure.Like this, can have radial the 8 identical effect that illustrates with Fig. 5, realize the high air quantityization of propeller type fan 6.
In Fig. 9 (c), it is characterized in that the gyroaxis that blow out side and propeller type fan 6 of rotating flow control panel 15 in guide ring 4 disposes a plurality of abreast.In Fig. 9 (c), to compare with Fig. 9 (b), rotating flow control panel 15 is not provided with opposite to each other with the gyratory directions of above-mentioned propeller type fan 6, so, its effect a little less than, but can reduce rotary speed, the dynamic pressure of the rotating flow of propeller type fan 6 can be reclaimed as static pressure.Like this, do not make the increase of the input power of propeller type fan 6 can increase air quantity, so, the effect of high efficiency, economize on electricity had.In Fig. 9 (b), 9 (c), this rotating flow control panel 15 can be integrally formed with guide ring 4, also can be formed separately.
In the explanation of this form of implementation, be that example is illustrated with the propeller type fan, but also applicable to mixed flow fan.In the outdoor unit of air conditioner that uses these propeller type fans or mixed flow fan, by reducing the noise of wind pushing mechanism, reduce the energy loss of security protection grid simultaneously, and will can reclaim as static pressure from the dynamic pressure of the rotating flow of propeller type fan, diagonal flow fan, thereby do not increase the motor input power and can increase air quantity, can suppress propeller type fan, mixed flow fan, reach the noise that the security protection grid produces, realize high air quantity, economize on electricityization.In addition,, can make propeller type fan and mixed flow fan miniaturization in the occasion of same air quantity, so, can realize low cost, small-sized device.
As described above in detail, according to the present invention, fan for outdoor unit of air conditioner, by the dynamic pressure of rotating flow can be reclaimed as static pressure, can make the fan high efficiency, realize the reduction of motor input power, simultaneously, can reduce the energy loss of security protection grid, even and do not increase noise for high air quantity yet; In addition, for comparing with existing outdoor unit of air conditioner, can provide the outdoor unit of air conditioner of high air quantityization, economize on electricityization, low noiseization at outdoor unit of air conditioner.
Claims (1)
1. outdoor unit of air conditioner, at the internal configurations heat exchanger and the propeller type fan of casing, simultaneously, the security protection grid that constitutes by radial and concentric circles bar in above-mentioned casing setting opposite to each other with above-mentioned propeller type fan; It is characterized in that: above-mentioned radial along having on the section of fan rotation axis line direction and blowing out the corresponding regulation curvature of angle at 70～80% position air stream of the external diameter of described propeller fan.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001222595A JP2003035438A (en) | 2001-07-24 | 2001-07-24 | Outdoor unit for air conditioner |
| JP222595/2001 | 2001-07-24 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1399102A CN1399102A (en) | 2003-02-26 |
| CN1221766C true CN1221766C (en) | 2005-10-05 |
Family
ID=19056051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02107514 Expired - Lifetime CN1221766C (en) | 2001-07-24 | 2002-03-14 | Outdoor unit of air conditioner |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2003035438A (en) |
| CN (1) | CN1221766C (en) |
| MY (1) | MY134668A (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090043715A (en) | 2007-10-30 | 2009-05-07 | 삼성전자주식회사 | Fan-guard and outdoor unit for air conditioner |
| US9551498B2 (en) * | 2012-06-28 | 2017-01-24 | Samsung Electronics Co., Ltd. | Indoor unit of air conditioner and method of controlling the air conditioner |
| CN104930604B (en) * | 2014-03-17 | 2018-02-27 | 珠海格力电器股份有限公司 | The design method of air-out safeguard structure, air-conditioner outdoor unit and air-out safeguard structure |
| JP6364617B2 (en) * | 2014-06-25 | 2018-08-01 | パナソニックＩｐマネジメント株式会社 | Blower and outdoor unit |
| TWI634268B (en) * | 2017-02-16 | 2018-09-01 | 建準電機工業股份有限公司 | A vibration blocking connector and fan with said connector |
| WO2019093833A1 (en) | 2017-11-13 | 2019-05-16 | Samsung Electronics Co., Ltd. | Blower and outdoor unit of air conditioner having the same |
| JP7042588B2 (en) * | 2017-11-13 | 2022-03-28 | 三星電子株式会社 | Blower and outdoor unit of air conditioner |
| JP7004809B2 (en) | 2018-05-22 | 2022-01-21 | 三菱電機株式会社 | Blower and air conditioner |
-
2001
- 2001-07-24 JP JP2001222595A patent/JP2003035438A/en active Pending
-
2002
- 2002-03-13 MY MYPI20020915 patent/MY134668A/en unknown
- 2002-03-14 CN CN 02107514 patent/CN1221766C/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| MY134668A (en) | 2007-12-31 |
| JP2003035438A (en) | 2003-02-07 |
| CN1399102A (en) | 2003-02-26 |
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Owner name: HITACHI APPLIANCES, INC. Free format text: FORMER OWNER: HITACHI,LTD. Effective date: 20150625 |
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Effective date of registration: 20160913 Address after: Hongkong, China Patentee after: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. Address before: Tokyo, Japan, Japan Patentee before: Hitachi Appliances Inc. |
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Effective date of registration: 20180704 Address after: Tokyo, Japan, Japan Patentee after: Hitachi Johnson Controls Air Conditioning Co., Ltd. Address before: Hongkong, China Patentee before: Johnson Controls Hitachi air conditioning technology (Hongkong) Co., Ltd. |
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