CN100526762C - Continuous arc evaporator of wall hung air conditioner indoor unit - Google Patents
Continuous arc evaporator of wall hung air conditioner indoor unit Download PDFInfo
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- CN100526762C CN100526762C CNB2006100660651A CN200610066065A CN100526762C CN 100526762 C CN100526762 C CN 100526762C CN B2006100660651 A CNB2006100660651 A CN B2006100660651A CN 200610066065 A CN200610066065 A CN 200610066065A CN 100526762 C CN100526762 C CN 100526762C
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Abstract
The continuous arc evaporator of wall hung air conditioner indoor unit and the transverse flow blower constitute one wind channel system of the air conditioner indoor unit. The evaporator consists of two sections of directly formed arc heat exchangers combined together, and one of these two sections has greater length. Two connecting lines of the ends of the continuous arc evaporator and the circle center of the transverse flow blower constitute one angle greater than or equal to 180 deg. The evaporator of the present invention has compact structure, increased heat exchange area, homogeneous wind distribution, low noise and high heat exchange efficiency.
Description
Technical field
The present invention relates to a kind of evaporimeter of wall-hanging air conditioner indoor unit.
Background technology
The separated wall hanging type air conditioner indoor machine evaporation is one of major critical component in the indoor set, and the performance of air-conditioner depends on the technical and economic performance quality of evaporimeter to a great extent.How to design its shape and physical dimension and make itself and crossflow fan form the ducting system an of the best, the appearance and size and the machine performance of machine in empty had bigger influence.
Existing wall-hanging air conditioner indoor unit evaporator mostly is one section linear evaporimeter or multi-section combined linear evaporimeter.
One section straight plate evaporator is seen shown in Figure 1 with the indoor set that the crossing current wind wheel is formed.
The line angle of straight plate evaporator two-end-point a, b and crossing current wind wheel center of circle O represents that with θ every some distance to crossing current wind wheel circumference on the line is represented with Ln.The zone that angle theta comprises represents that with B the zone that angle theta does not comprise is represented with A.One section straight plate heat exchanger is subjected to structural limitations θ angle little, and the B region area is also less, and the a-quadrant area is bigger.Because the a-quadrant can not air intake, same appearance and size, effectively the air intake zone is little, and the diameter of cross flow fan is also little, and intake is little, and the heat exchanger area that can hold is also less.
The crossing current wind wheel structure is different from centrifugal and shaft flow blade, distinguished and admirable is that blade by crossing current wind wheel top enters, flow out from the blade of crossing current wind wheel bottom, the blade of flowing through for twice, cause overdraught to form a mobile vortex in that wind wheel is inner, the size of this vortex and position in various degree influence blower fan through-current capability and noise.Variation along with charge air flow, then along the circumferential direction move at the center of vortex, center of vorticity is changed apart from α R value, the size of vortex has bigger influence to noise and air quantity, in order to reduce noise and to increase air quantity, wish that in theory α R value levels off to R, at this moment vortex is minimum, and inner through-current capability strengthens.
Because the heat exchanger diverse location is to the distance value difference of tubular wine wheel, when tubular wine wheel rotates, pass the charge air flow that the heat exchanger fin gap sucks, the constraint of the main heated exchanger structure of the direction of air-flow before flowing to tubular wine wheel, cause the flow inlet angle of wind wheel import to change greatly, form certain inlet air flow winding speed, influence the performance of cross flow fan.Ln (as shown in Figure 1) be smaller value location charge air flow more rapidly, other location charge air flow then relatively slowly, make the charge air flow of indoor set zones of different have certain air pressure difference, the air velocity of each point is also different on the wind wheel excircle, in this case, the vortex in the wind wheel strengthens, and makes wind wheel produce fluctuation, increase noise, air quantity reduces.It is big more that the Ln value differs, also big more to the influence of noise and air quantity.
Because the Ln value of straight plate heat exchanger diverse location differs greatly, make wind wheel non-constant through the charge air flow of over-heat-exchanger, air pressure difference is bigger, make the fluid velocity of each point on the impeller outer circumference also different, center of vorticity is apart from diminishing in this case, and vortex increases, and makes impeller produce fluctuation, noise increases, and intake reduces.
In addition, straight plate heat exchanger front face area is little, can only be from a direction air intake, and the indoor set space utilization is low, causes indoor set appearance and size bigger than normal.
Straight piece combined heat exchanger is seen Fig. 2, shown in Figure 3 with the indoor set that the crossing current wind wheel is formed.
Straight piece combined heat exchanger is to be assembled by two sections straight plate heat exchangers or the straight plate heat exchanger of multistage, and its θ angle is obviously strengthened.Along with increasing of hop count, open ended evaporimeter area of dissipation increases in identical indoor set spatial volume, and the diameter of indoor set Air Blast fan also can strengthen, the also corresponding raising of the exchange capability of heat of indoor set.
Though the Ln of combined heat exchanger differs than one section straight chip bigger improvement is arranged, the α value is increased to some extent than straight plate heat exchanger, but because every section all be straight chip, it is still bigger that Ln differs, and the section with section between combination place have opening, fan blade is non-constant from the air quantity that heat exchanger sucks everywhere, still there is air pressure difference, the fluid velocity of each point is also different on the impeller outer circumference, and in this case, it is still good inadequately that noise parameter is stressed results.
And because the existence of opening, the evaporimeter area of dissipation that makes identical indoor set spatial volume hold can not reach maximization on the one hand; The existence of opening has changed evaporimeter air flow resistance everywhere on the other hand, makes evaporimeter air quantity skewness, and the opening part area of dissipation is less relatively and air quantity is bigger, makes cold-producing medium inhomogeneous at in-tube evaporation, influences the exchange capability of heat of evaporimeter.
Because the existence of opening, the flowing of the condensed water that produces when being unfavorable for freezing also has certain influence to the exchange capability of heat of evaporimeter; The fin opening part causes reviewing easily during the manufacturing, can influence intake.
And along with hop count increases, the straight plate heat exchanger assemble products from parts of multistage also increase many, and assembly technology is relative complex also.
Summary of the invention
The object of the present invention is to provide the evaporimeter that a kind of wall-hanging air conditioner indoor unit is provided, can overcome the defective of existing A/C evaporator, improve heat exchange efficiency, increase air output, reduce noise, reduce the volume of indoor set.
Evaporimeter of the present invention is to be formed by the combination of the circular arc heat exchanger of two sections straight formings, and wherein an end of an end of first section circular arc heat exchanger and second section circular arc heat exchanger is connected.This evaporimeter and crossflow fan are formed the ducting system of indoor apparatus of air conditioner.
In above-mentioned two sections circular arc heat exchangers, the length of first section circular arc heat exchanger is greater than the length of second section circular arc heat exchanger.
The angle of above-mentioned oval curved heat exchanger two ends line and short circular arc heat exchanger two ends line is spent between 70 degree 30.
On above-mentioned first section circular arc heat exchanger away from the end points of second section circular arc heat exchanger and the second section circular arc heat exchanger away from the angle between the line in the end points of first section circular arc heat exchanger and the crossflow fan center of circle more than or equal to 180 °.
The length of above-mentioned oval curved heat exchanger is 1.5-3 times of short circular arc heat exchanger.
Evaporimeter of the present invention adopts the circular arc heat exchanger of straight forming, compact conformation, assembly technology is simple, avoided the opening of multistage straight line evaporimeter assembling combination joint portion, increased heat exchanger area, air quantity is evenly distributed simultaneously, can reduce noise, improve heat exchange efficiency, make heat exchanger performance obtain maximum performance, also can reduce the volume of indoor set.
Description of drawings
Fig. 1 is the structure chart of straight plate evaporator
Fig. 2 is the structure chart of two segments combined evaporimeter
Fig. 3 is the structure chart of multisection type evaporimeter
Fig. 4 is the structure chart of continuous arc evaporimeter of the present invention
Fig. 5 is the air-flow schematic diagram of the indoor set crossflow fan of the common evaporimeter of employing
Fig. 6 is the air-flow schematic diagram of the indoor set crossflow fan of employing continuous arc evaporimeter of the present invention
Fig. 7 is the comparison diagram of the air conditioner indoor set wind outlet mean flow rate of four kinds of form evaporimeters
The specific embodiment
Continuous arc evaporator of the present invention is to be formed by the combination of the circular arc heat exchanger of two sections straight formings, and wherein an end of an end of first section circular arc heat exchanger 1 and second section circular arc heat exchanger 2 is connected.This evaporimeter and crossflow fan 3 are formed the ducting system of indoor apparatus of air conditioner.
The angle α of above-mentioned first section circular arc heat exchanger, 1 two ends line and second section circular arc heat exchanger 2 two ends line spends between 70 degree 30.
Under the ideal situation, the radian of heat exchanger is identical with the radian of impeller, and the distance that makes heat exchanger arrive impeller everywhere equates, promptly air-flow enters impeller inlet for radially, and this moment, air-flow was not turned back at inlet flow field, and air inlet is the most even, and flow losses are minimum also.But because the requirement of air-conditioning appearance and size often is difficult to realize the concentrically ringed heat exchanger arrangement of impeller.The present invention adopts the circular arc heat exchanger combination of two sections straight formings to form, be for the radian that makes arc evaporator identical as far as possible with the radian of impeller.Each point to the minimum of a value of the distance L n in the impeller center of circle 0 and the ratio of maximum is between 1:1-1:1.5 on the arc evaporator.
The radian of first section circular arc heat exchanger 1 is 80 °-160 °, the radian of second section circular arc heat exchanger 2 is 20 °-40 °, on above-mentioned first section circular arc heat exchanger away from the end points a of second section circular arc heat exchanger and the second section circular arc heat exchanger away from the line angle theta of the end points b of first section circular arc heat exchanger and crossing current wind wheel center of circle O more than or equal to 180 °.
Because the line angle theta in arc evaporator two-end-point a of the present invention, b and the crossing current wind wheel center of circle 0 is more than or equal to 180 °, indoor set does not have the a-quadrant to exist.Because the circular arc of circular arc heat exchanger is basic and circumference of impeller is coincide, thereby make Ln differ less, the air quantity substantially constant that fan blade enters everywhere from heat exchanger, air pressure difference is less, just the impeller cylindrical fluid velocity of using each point keeps the same substantially, eddy current does not produce vibration when not making the impeller operation substantially, and the fan blade operating ratio is more steady, makes the noise of indoor set can be controlled at more satisfactory state.
Circular arc heat exchanger front face area is big, and wind wheel can be from a plurality of direction air intakes, and the indoor set air quantity is big, and the indoor set space is effectively utilized, thereby makes the miniaturization more of indoor set contour structure size.
Indoor set air inlet zone exists a main air inflow region, and air-flow is comparatively concentrated in this zone.If adopt traditional heat exchanger arrangement, not only the inlet velocity size and Orientation of air-flow is extremely inhomogeneous, and dense degree also has very big difference.In two sections circular arc heat exchangers of the present invention, the arc length of first section circular arc heat exchanger 1 is greater than the arc length of second section circular arc heat exchanger 2.Make oval curved heat exchanger towards main air inflow region, can optimize inlet flow field, make the inlet velocity field even.Preferably, the arc length of above-mentioned oval curved heat exchanger is 1.5-3 times of arc length of short circular arc heat exchanger.
Fig. 5 is the air-flow schematic diagram of the indoor set crossflow fan 3 of the common evaporimeter of employing.Can find out by this figure, the eccentric eddy 4 that can control whole air current flow of the inboard existence of blower fan, the rotation direction of this eddy current is consistent with turning to of blower fan.This is that air-flow is twice blade of flowing through because the cross flow fan structure is different from centrifugal wind wheel and axial-flow windwheel, is entered by the blade on cross flow fan top, flows out from the blade of cross flow fan bottom, causes downstream at mobile vortex 4 of the inner formation of blower fan.The size of this vortex and position influence the through-current capability and the noise of indoor set to some extent.Because the existence of eddy current in this, make the air of the having discharged return fan inside of flowing backwards again, this backflow has caused very big energy loss.The efficient of cross flow fan just depends on this return flow shared ratio in total flow, will great role be arranged to the flow field of improving cross flow fan so control the size and the position of this whirlpool.The size of vortex also has bigger influence to noise, in order to reduce noise and to increase air quantity, should make vortex 4 minimums, and away from the center O of tubular wine wheel 3.
Because common evaporimeter diverse location is to the distance value difference of tubular wine wheel, when tubular wine wheel rotates, pass the charge air flow that the heat exchanger fin gap sucks, the constraint of the main heated exchanger structure of the direction of air-flow before flowing to tubular wine wheel, cause the flow inlet angle of wind wheel import to change greatly, form certain inlet air flow winding speed, influence the performance of cross flow fan.Ln (as shown in Figure 1) be smaller value location charge air flow more rapidly, other location charge air flow then relatively slowly, make the charge air flow of indoor set zones of different have certain air pressure difference, the air velocity of each point is also different on the wind wheel excircle, and in this case, the vortex 4 in the wind wheel strengthens, vortex 4 is less apart from the distance alpha R of the center O of tubular wine wheel 3, make wind wheel produce fluctuation, increase noise, and air quantity is also had certain influence.It is big more that the Ln value differs, also big more to the influence of noise and air quantity.
Fig. 6 is the air-flow schematic diagram of the indoor set crossflow fan 3 of employing continuous arc evaporimeter of the present invention.As seen from Figure 6, the center of vorticity of indoor apparatus of air conditioner inner vortex 4 with continuous arc evaporimeter is bigger apart from the distance alpha R of the center O of tubular wine wheel 3, and whirlpool 4 is less, and the backflow of air-flow reduces, thereby make the negotiability of indoor set inside strengthen, increased the outlet air quantity.In addition, arc evaporimeter diverse location is more or less the same to the distance value Ln of tubular wine wheel continuously, so just improve the tubular wine wheel inlet air conditions everywhere and the airintake direction of import department's each point air-flow, reduced and formed unnecessary flow separation when flowing through wind wheel, improve the internal flowing state of wind wheel, thereby reduce the vortex radius of air-flow in the wind wheel, reduce pneumatic eddy current crack.
Fig. 7 is the comparison of the indoor apparatus of air conditioner outlet mean flow rate of four kinds of form heat exchangers among Fig. 1-Fig. 4.Abscissa is a rotation speed of fan among the figure, and ordinate is the outlet air mean flow rate.As seen from Figure 7, adopt the evaporimeter of relative other type of indoor set outlet mean flow rate of continuous arc evaporimeter to want big, this shows the inner flowing characteristic that adopts continuous arc evaporimeter of the present invention can improve indoor set, increases the outlet air quantity, thereby improves the heat exchange efficiency of evaporimeter.
Evaporimeter of the present invention as seen from the above adopts continuous arc evaporator, compact conformation, assembly technology is simple, avoided the opening of multistage straight line evaporimeter assembling combination joint portion, increased heat exchanger area, air quantity is evenly distributed simultaneously, can reduce noise, improve heat exchange efficiency, make heat exchanger performance obtain maximum performance.
Claims (6)
1, a kind of continuous arc evaporator of wall-hanging air conditioner indoor unit, this evaporimeter and crossflow fan are formed the ducting system of an indoor apparatus of air conditioner, it is characterized in that: described evaporimeter is to be formed by the combination of the circular arc heat exchanger of two sections straight formings, wherein an end of an end of first section circular arc heat exchanger and second section circular arc heat exchanger is connected, the radian of first section circular arc heat exchanger is 80 °-160 °, and the radian of second section circular arc heat exchanger is 20 °-40 °.
2, the continuous arc evaporator of wall-hanging air conditioner indoor unit according to claim 1 is characterized in that: in described two sections circular arc heat exchangers, the length of first section circular arc heat exchanger is greater than the length of second section circular arc heat exchanger.
3, the continuous arc evaporator of wall-hanging air conditioner indoor unit according to claim 2 is characterized in that: the length of first section circular arc heat exchanger is 1.5-3 times of length of second section circular arc heat exchanger.
4, the continuous arc evaporator of wall-hanging air conditioner indoor unit according to claim 1 and 2 is characterized in that: the angle of first section circular arc heat exchanger two ends line and second section circular arc heat exchanger two ends line is between 30 ° to 70 °.
5, the continuous arc evaporator of wall-hanging air conditioner indoor unit according to claim 1 and 2 is characterized in that: on described first section circular arc heat exchanger away from the end points (a) of second section circular arc heat exchanger and the second section circular arc heat exchanger away from the angle (θ) between the line of the end points (b) of first section circular arc heat exchanger and the crossflow fan center of circle (O) more than or equal to 180 °.
6, the continuous arc evaporator of wall-hanging air conditioner indoor unit according to claim 1 and 2 is characterized in that: each point to the minimum value and value in the impeller center of circle and the ratio of maximum is between 1:1-1:1.5 on two sections circular arc heat exchangers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100660651A CN100526762C (en) | 2006-03-28 | 2006-03-28 | Continuous arc evaporator of wall hung air conditioner indoor unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006100660651A CN100526762C (en) | 2006-03-28 | 2006-03-28 | Continuous arc evaporator of wall hung air conditioner indoor unit |
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| Publication Number | Publication Date |
|---|---|
| CN101046340A CN101046340A (en) | 2007-10-03 |
| CN100526762C true CN100526762C (en) | 2009-08-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CNB2006100660651A Active CN100526762C (en) | 2006-03-28 | 2006-03-28 | Continuous arc evaporator of wall hung air conditioner indoor unit |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202747482U (en) * | 2012-06-13 | 2013-02-20 | 珠海格力电器股份有限公司 | Indoor unit |
| CN106122103A (en) * | 2016-08-24 | 2016-11-16 | 珠海格力电器股份有限公司 | Air-conditioner, cross flow fan and worm frame thereof |
| JP7244773B2 (en) * | 2021-01-22 | 2023-03-23 | ダイキン工業株式会社 | Wall-mounted air conditioning indoor units and air conditioners |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000161765A (en) * | 1998-11-25 | 2000-06-16 | Daikin Ind Ltd | Indoor unit for air conditioner |
| CN1064123C (en) * | 1994-02-21 | 2001-04-04 | 株式会社东芝 | Air conditioner |
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2006
- 2006-03-28 CN CNB2006100660651A patent/CN100526762C/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1064123C (en) * | 1994-02-21 | 2001-04-04 | 株式会社东芝 | Air conditioner |
| JP2000161765A (en) * | 1998-11-25 | 2000-06-16 | Daikin Ind Ltd | Indoor unit for air conditioner |
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| CN101046340A (en) | 2007-10-03 |
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