CN101907374B - Finned tube type heat exchanger and manufacture method thereof - Google Patents
Finned tube type heat exchanger and manufacture method thereof Download PDFInfo
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- CN101907374B CN101907374B CN2010102404016A CN201010240401A CN101907374B CN 101907374 B CN101907374 B CN 101907374B CN 2010102404016 A CN2010102404016 A CN 2010102404016A CN 201010240401 A CN201010240401 A CN 201010240401A CN 101907374 B CN101907374 B CN 101907374B
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Abstract
The invention relates to a finned tube type heat exchanger and a manufacture method thereof. The finned tube type heat exchanger is arranged in an indoor unit frame with an air inlet and an air outlet. A flow-through fan is also arranged in the indoor unit frame, and the finned tube type heat exchanger is arranged around the flow-through fan. The finned tube type heat exchanger comprises a first heat exchanger fin and a second heat exchanger fin. The second heat exchanger fin comprises an upper fin and a middle and lower fin; and the edge of the middle and lower fin is an arc. The average airflow direction flowing through the whole second exchanger fin is set as an X direction. The distances between the air-feeding edges and the air-exhausting edges at all positions of the second exchanger fin along the average airflow direction are same, wherein the air-exhausting edge of the middle and lower fin is tangent to the air-exhausting edge of the upper fin at a first tangency point; and the air-feeding edge of the middle and lower fin is tangent to the air-feeding edge of the upper fin at a second tangency point. The invention has the characteristics of increasing the heat exchanging capacity, enlarging the air quantity, reducing the noise, and promoting the exhaustion of condensate water.
Description
Technical field
The present invention relates to a kind of fin-tube heat exchanger and preparation method thereof.
Background technology
Referring to Fig. 1, the multi-bended heat exchanger of traditional indoor apparatus of air conditioner is through being centered around the size that improves the utilization ratio of axial-flow fan 9 and dwindle indoor apparatus of air conditioner of axial-flow fan 9 on every side.When making this multi-bended heat exchanger, be that to adopt the edge be the fin of parallel lines, at first through being that the fin of parallel lines excises local 2 to the edge, then through folding with its be centered around axial-flow fan 9 around.But, as shown in Figure 2, when being the fin of parallel lines, need excise the part fin that is positioned at first edge 22 in burst at this edge of punching production, understand waste material like this.When folding, need certain exceptional space, will increase the width and the size of indoor apparatus of air conditioner like this.And burst 8 can flow increase windage and noise by the upset air.
In addition because to adopt the edge be the fin of parallel lines, folding after, the following side leeward Edge Distance axial-flow fan of fin will be smaller apart from S, air can cause bigger noise when this flows through.
When the heat exchanger of indoor apparatus of air conditioner was used as evaporimeter, the condensed water that heat exchanger surface generates can be deposited in angle folding 8 places, further increased resistance and operation noise.And the condensed water of accumulation also possibly be inhaled into axial-flow fan 9, blows out from air outlet 6.
With reference to disclosed second heat exchanger fin shown in Fig. 8 pattern one of Chinese patent document CN1869535A; It is the fin of parallel lines that the upside of this second heat exchanger fin and downside all adopt the edge; Upside and downside fin intersect the bending shape that forms a kind of integral body; But this whole bending fin does not solve the perturbed problem to air stream of bending place, and the bending place is because angle with width variation suddenly takes place, and condensed water might drip in the bending place.Chinese patent document CN1833142A and CN1576728A disclose second heat exchanger fin shown in Fig. 8 pattern two in addition; It is the fin of parallel lines that the upside of second heat exchanger fin and downside adopt the edge, uses the edge to link to each other as the fin of arc in upside and downside junction.Though alleviated the problem that angle folding brings like this; But because the junction of curve-like fin exists angle and change width; Still the disturbance that causes to flowing to a certain extent, condensed water also might drip at curve-like fin place or be inhaled into axial-flow fan.These two schemes downside of all not having to solve second heat exchanger is that the noise that fin leeward Edge Distance axial-flow fan that the parallel lines fin causes excessively closely brings increases problem owing to adopting the edge in addition.
In addition; Because the air inlet 5 of indoor apparatus of air conditioner is positioned at the top of indoor set, the downside of 6 of air outlets and indoor set is so the air quantity of upside of first heat exchanger 1 and second heat exchanger 2 that is positioned at air inlet 5 annexes is than wind speed is very fast greatly; The air quantity of the downside of second heat exchanger 2 is less; Wind speed is slower, can not give full play to the performance of heat exchanger here, in order to give full play to the lower portion performance of second heat exchanger 2; Need make on the heat exchanger everywhere wind speed profile as far as possible evenly, promote the lower portion wind speed of second heat exchanger 2.
The same caliber design of the general employing of the heat-transfer pipe of the multi-bended heat exchanger of indoor apparatus of air conditioner; But the refrigerant that in the pipe of indoor apparatus of air conditioner, flows possibly be in the two-phase region of gaseous regions, liquid zone and gas-liquid two-phase coexistence; Heat transfer property in these different zones is all different with the pressure loss; To cause the exchange capability of heat of heat exchanger inhomogeneous, reduce whole exchange capability of heat.
Summary of the invention
The object of the invention aim to provide a kind of simple and reasonable, can promote exchange capability of heat, mean wind speed and distribute, increase air quantity, reduce noise and promote fin-tube heat exchanger that condensed water is discharged and preparation method thereof, to overcome weak point of the prior art.
A kind of fin-tube heat exchanger by this purpose design; Be arranged in the indoor set framework of bringing air port and air outlet into, also be provided with axial-flow fan in the indoor set framework, fin-tube heat exchanger be arranged on axial-flow fan around; Its architectural feature is that fin-tube heat exchanger comprises first heat exchanger fin and second heat exchanger fin; Second heat exchanger fin comprises upper fins and middle and lower part fin, and this middle and lower part fin edges is a camber line, and the mean air flow direction of setting whole second heat exchanger fin of flowing through is a directions X; Along this mean air flow direction, second heat exchanger fin windward edge and the distance between the leeward edge everywhere equates;
Wherein, the leeward edge of middle and lower part fin and the leeward edge of upper fins are tangential on first point of contact, and the windward edge of middle and lower part fin and the windward edge of upper fins are tangential on second point of contact;
First point of contact is parallel with the mean air flow direction with the line between second point of contact.
The edge of the upper fins of said first heat exchanger fin and second heat exchanger fin is a straight line; The width of the upper fins of first heat exchanger fin and second heat exchanger fin is identical; And when being assembled in first heat exchanger fin and second heat exchanger fin in the indoor set framework; The edge tangent line of the upper fins of second heat exchanger fin and first angle between the vertical line are between 25 °～45 °, and the edge tangent line of first heat exchanger fin and second angle between the vertical line are between 25 °～45 °.
Form the 5th angle between the edge tangent line of the upper fins of said second heat exchanger fin and the mean air flow direction, also form the 5th angle between edge tangent line of the top of the middle and lower part fin of second heat exchanger fin and the mean air flow direction; The top here is meant the first above-mentioned point of contact and second point of contact;
Form the 4th angle between the edge tangent line bottom of the middle and lower part fin of second heat exchanger fin and the mean air flow direction, and the 5th angle＞the 4th angle,
Wherein, The top of middle and lower part fin and middle and lower part fin bottom between edge tangent line and the mean air flow direction of part between form the 3rd angle; Along the direction bottom of the top fin towards the middle and lower part of lower fins therefrom, the 3rd angle gradually reduces the 4th angle from the 5th angle.
The windward edge of the middle and lower part fin of said second heat exchanger fin and leeward edge are the circular arc of same radius, identical radian measure, and the radius of this circular arc is greater than the radius of axial-flow fan.
The upper end of the middle and lower part fin of said second heat exchanger fin and rely on first point of contact and second point of contact near the diameter of second heat-transfer pipe, bigger than the diameter of first heat-transfer pipe that is positioned at middle and lower part other parts of fin.
Said first heat exchanger fin and second heat exchanger fin fold over the shape of falling V axial-flow fan, and second heat exchanger fin is c-shaped.
A kind of preparation method of fin-tube heat exchanger; It is characterized in that said first heat exchanger fin and second heat exchanger fin adopt the mode of continuous punching press to make respectively; Wherein, the feeding method of second heat exchanger fin is: the feed direction of second heat exchanger fin is the mean air flow direction along whole second heat exchanger fin of flowing through; Per step feed length is to equate at windward edge on the mean air flow direction and the distance between the leeward edge along this mean air flow direction and with second heat exchanger fin; The feeding method of first heat exchanger fin is identical with second heat exchanger fin with per step feed length;
Said first heat exchanger fin and second heat exchanger fin at first connect together and adopt the mode of continuous punching press to make simultaneously; Feed direction is the mean air flow direction along whole second heat exchanger fin of flowing through; Per step feed length is to equate at windward edge on the mean air flow direction and the distance between the leeward edge along this mean air flow direction and with second heat exchanger fin; Then, first heat exchanger fin and second heat exchanger fin are separated again through excision the 3rd corner part.
Heat-transfer pipe in the upper fins of second heat exchanger fin and first heat exchanger fin is 2～3 rows, and the heat-transfer pipe in the middle and lower part fin of second heat exchanger fin is 1～2 row; Heat-transfer pipe wherein is first heat-transfer pipe and/or second heat-transfer pipe as required.
Refrigerant porch and refrigerant exit place at fin-tube heat exchanger adopt the thicker heat-transfer pipe of caliber respectively, and adopt 1～2 tunnel stream, improve the flow velocity of refrigerant in the monophase field at refrigerant porch and refrigerant exit place, improve its exchange capability of heat; Two-phase region at the middle part of fin-tube heat exchanger adopts the thinner heat-transfer pipe of caliber, and adopts 3～8 tunnel stream, reduces the refrigerant flow resistance of refrigerant in the gas-liquid two-phase region; Heat-transfer pipe wherein is first heat-transfer pipe and/or second heat-transfer pipe as required.
Because the structure of indoor set framework so the direction of air stream mainly is to be sucked by air inlet, behind heat exchanger and axial-flow fan, blows out from air outlet.Heat exchanger among the present invention comprises first heat exchanger and second heat exchanger; Second heat exchanger is as the bigger main heat exchanger of surface area; The flow through mean air flow direction of second heat exchanger of setting is a directions X, and along this mean air flow direction, windward edge and the distance between the leeward edge everywhere of second heat exchanger fin in this second heat exchanger equates; The uniformity of the heat exchange property of second heat exchanger can be promoted like this, and the generation of useless defective material can be reduced for continuous this fin of punching production.The present invention is an arc with the edge designs of the middle and lower part fin in second heat exchanger fin; Make second heat exchanger fin need not carry out that multistage is folding just can be housed in the indoor machine of air-conditioner framework, and can increase the leeward edge of middle and lower part fin and the distance between the axial-flow fan; And do not have burst that air-flow is caused disturbance, can reduce flowing resistance, improve air quantity, and can reduce to move noise; And, also can better promote under the condensation flow.
The present invention is tangential on first point of contact with the leeward edge of the middle and lower part fin of second heat exchanger fin and the leeward edge of upper fins, and the windward edge of middle and lower part fin and the windward edge of upper fins are tangential on second point of contact; First point of contact is parallel with the mean air flow direction with the line between second point of contact, and through this design, the upper fins of second heat exchanger fin and middle and lower part fin can seamlessly transit, and can further reduce turbulent flow, noise-decreasing like this.
The edge tangent line of the upper fins of second heat exchanger fin among the present invention and first angle between the vertical line are between 25 °～45 °, and the edge tangent line of first heat exchanger fin and second angle between the vertical line are between 25 °～45 °.If this first angle or second angle are too small, the whole heat exchanger volume that then can place in a certain size indoor set framework inside can be smaller, and will cause the spacing between heat exchanger and the axial-flow fan to become near, thereby cause noise to increase; But, if this first angle or second angle are excessive, will cause condensed water to be difficult to flow down along heat exchanger, can be inhaled in the axial-flow fan, and be blown out to indoor from air outlet.When first angle or second angle design during, can reasonablely avoid the problems referred to above at 25 °～45 °.
The edge, the top of the middle and lower part fin of second heat exchanger fin among the present invention and the edge of upper fins are tangential on first point of contact and second point of contact respectively, and the edge, the top here is meant the leeward edge of middle and lower part fin and the edge, the top at windward edge; Because the middle and lower part fin edges of second heat exchanger fin is the continuous arc that bends towards axial-flow fan, so along the direction bottom of the top fin towards the middle and lower part of lower fins therefrom, the 3rd angle gradually reduces the 4th angle from the 5th angle.The windward edge of the middle and lower part fin of second heat exchanger fin and leeward edge can be designed as the circular arc of same radius, identical radian measure in order to process easy design; The lower end of the upper fins of the upper end of this circular arc and second heat exchanger fin is tangent.In addition, the radius of this circular arc is greater than the radius of axial-flow fan, and its purpose is: if the radius of circular arc is too small, can bring the angle and the change width of the middle and lower part fin in second heat exchanger fin rapid, increase the disturbance to air-flow, increase flowing resistance.
The present invention is with the top of the middle and lower part fin of second heat exchanger fin; Just the diameter than the heat-transfer pipe of other parts near the diameter design of the heat-transfer pipe of first point of contact and vicinity, second point of contact is big; Purpose is: can make near the flowing resistance first point of contact and second point of contact increase a little; Thereby can let more air flow to the downside of middle and lower part fin, to promote the exchange capability of heat at this place.
First heat exchanger fin and second heat exchanger fin among the present invention both can be produced simultaneously, also can produced by separation, and it has bigger flexibility.
The present invention is through guaranteeing that along feed direction be along mean air flow direction and the feed length principle design identical with the distance between the windward edge with the windward edge of second heat exchanger fin; And the edge of the upper fins of second heat exchanger fin and first heat exchanger fin is a parallel lines; Therefore; When feed direction adopts the mode of continuous punching press to make; Each feed length is equal distance, so can guarantee can not produce the unnecessary defective material except the cut-out of corner in the processing continuously.In addition, the windward edge of first heat exchanger fin and the upper fins of second heat exchanger fin is identical with the shape at leeward edge, can also utilize the diel manufacturing of same shape; To practice thrift die cost; Simplify manufacturing procedure, can improve manufacturing efficient, reduce manufacturing cost.
Heat-transfer pipe on the fin-tube heat exchanger among the present invention can adopt different pipe row numbers in different positions.At the upper fins and first heat exchanger fin of second heat exchanger fin nearer, because wind speed is bigger, so can adopt 2～3 row's heat-transfer pipes apart from air inlet; The middle and lower part fin of second heat exchanger fin adopts 1～2 row's heat-transfer pipe, comes the balance wind speed profile with this, promotes exchange capability of heat.
The present invention adopts the thicker heat-transfer pipe of caliber respectively at the refrigerant porch and the refrigerant exit place of fin-tube heat exchanger; Such as caliber is φ 6mm～φ 9mm; And adopt 1～2 tunnel stream; Improve the flow velocity of refrigerant in the monophase field at refrigerant porch and refrigerant exit place, improve its exchange capability of heat; Two-phase region at the middle part of fin-tube heat exchanger adopts the thinner heat-transfer pipe of caliber, is φ 3mm～φ 6mm such as caliber, and adopts 3～8 tunnel stream, reduces the refrigerant flow resistance of refrigerant in the gas-liquid two-phase region.
That the present invention has is simple and reasonable, can promote exchange capability of heat, increase air quantity, reduce noise and promote the characteristics that condensed water is discharged.
Description of drawings
Fig. 1 is traditional indoor apparatus of air conditioner broken section structural representation.
Fig. 2 is traditional fin manuscript.
Fig. 3 is one embodiment of the invention structural representation.
Fig. 4 is the end face structure sketch map of the heat exchanger among the present invention.
The structure for amplifying sketch map that Fig. 5 processes for first heat exchanger fin among the present invention and second heat exchanger fin simultaneously.
Fig. 6 is second heat exchanger fin structure for amplifying sketch map of processing separately.
Fig. 7 is the amplification assumption diagram after first heat exchanger fin and the processing of second heat exchanger fin.
Fig. 8 is the structural representation of existing whole folding type fin.
Fig. 9 is the computational methods figure of the width among the present invention.
Among the figure: 1 is first heat exchanger fin, and 2 is second heat exchanger fin, and 3 is the top of second heat exchanger fin, and 4 is the bottom of second heat exchanger fin, and 5 is air inlet; 6 is air outlet, and 7 is the indoor set framework, and 8 is burst, and 9 is axial-flow fan, and 10 is the first less heat-transfer pipe of diameter; 24 is edge, and 11 is first heat exchanger fin, and 12 is second heat exchanger fin, and 13 is the upper fins of second heat exchanger fin; 14 is the middle and lower part fin of second heat exchanger fin, and 15 is bigger second heat-transfer pipe of diameter, and 16 is the leeward edge of first heat exchanger fin, and 17 is the windward edge of first heat exchanger fin; 18 is the leeward edge of the upper fins of second heat exchanger fin, and 19 is the windward edge of the upper fins of second heat exchanger fin, and 20 is the leeward edge of the middle and lower part fin of second heat exchanger, and 21 is the windward edge of the middle and lower part fin of second heat exchanger; 22 first edges, 23 is second edge, and 24 is the 3rd edge, and 25 is the 4th edge; A is first angle, and b is second angle, and e is the 3rd angle, and e1 is the 4th angle; E2 is the 5th angle, and e3 is the 6th angle, and I is first point of contact, and II is second point of contact.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the present invention is further described.
Referring to Fig. 3-Fig. 4; Second heat exchanger fin 12 of this fin-tube heat exchanger is one and becomes forniciform integral body; Through second heat exchanger fin 12 and first heat exchanger fin 11 are folded to form heat exchanger as shown in Figure 3; First heat exchanger fin 11 and second heat exchanger fin 12 fold over the shape of falling V axial-flow fan 9, and second heat exchanger fin 12 is approximate C shape; Then, again this heat exchanger package is contained in the interior formation of the framework indoor apparatus of air conditioner as shown in Figure 2 of indoor heat exchanger.
The upper fins 13 of second heat exchanger fin and the edge of first heat exchanger fin 11 are parallel lines.The edge of the second heat exchanger fin middle and lower part fin 14 is an arc.On the mean air flow direction, the directions X in the figure just, second heat exchanger fin 12 is in the wind equating apart from B between edge and the leeward edge everywhere.The leeward edge 20 of the middle and lower part fin 14 of second heat exchanger fin 12 is tangential on the first point of contact I with the leeward edge 18 of upper fins 13, and the windward edge 21 of middle and lower part fin 14 is tangential on the second point of contact II with the windward edge 19 of upper fins 13.The first point of contact I is parallel with mean air flow direction X with the line between the second point of contact II.The line that the representative of dotted line among Fig. 4 is above-mentioned can form the roughly global shape of C shape so that be smoothly transitted into the middle and lower part fin 14 of second heat exchanger fin from the upper fins 13 of second heat exchanger fin like this.
The first angle a between the edge tangent line of the upper fins 13 in second heat exchanger fin 12 and the vertical line is between 25 °～45 °, and the second angle b between the edge tangent line of first heat exchanger fin 11 and the vertical line is between 25 °～45 °.
Referring to Fig. 5-Fig. 6, design, the processing method of above-mentioned fin-tube heat exchanger described.
Except the local excision position: second edge 23, the 3rd edge 24 and the 4th edge 25, owing to excision produces beyond the defective material, can not have the processing of defective material continuously to other parts.Second heat exchanger fin 12 and first heat exchanger fin 11 that process are as shown in Figure 7, are folded to form heat exchanger shown in Figure 4 through the junction at first heat exchanger fin and second heat exchanger fin again.Certainly, also can be as shown in Figure 6, all-in-one-piece second heat exchanger fin 12 is produced separately, add first heat exchanger fin 11, also can form heat exchanger as shown in Figure 4.
In order to guarantee that above-mentioned process can not have the carrying out of defective material continuously, need design the Design and Machining process.During design, need and only satisfy identical and equal feed length between first heat exchanger fin 11 on the feed direction X and second heat exchanger fin 12 upper limb everywhere and lower edge everywhere apart from B.Wherein, the distance between the windward edge of first heat exchanger fin 11 and the leeward edge and the windward edge of second heat exchanger fin 12 equate with distance between the leeward edge, all are apart from B.
Adding man-hour like this, along feed direction X, per step feed length B can reach the purpose of continuous no defective material processing.And; First heat exchanger fin 11 through such processing is identical with the contour shape at leeward edge with the windward edge of second heat exchanger fin 12; Can behind feed direction X translation distance B, overlap; So the windward edge of first heat exchanger fin 11 and second heat exchanger fin 12 and leeward edge can process through the mould of same shape, thereby can save die cost and processing cost.
Definition width A is the vertical range between the tangent line of both sides of the edge of fin, sees Fig. 9, satisfies following relational expression by the geometrical relationship among the figure:
A=B * Sin (e) formula one,
Wherein, B is a feed length, and A is a width, and e is the edge tangential direction of fin and the 3rd angle between the feed direction X.
As shown in Figure 7; Because the upper fins 13 of all-in-one-piece second heat exchanger fin 12 and the edge of first heat exchanger fin 11 are parallel lines; So angle is a certain value between the upper fins 13 of second heat exchanger fin 12 and the fin edges of first heat exchanger fin 11 and the feed direction X, be respectively the 6th angle e3 and the 5th angle e2.Because the edge of the top of the middle and lower part fin 14 of second heat exchanger fin 12 and the edge of upper fins 13 are tangential on the first point of contact I and the second point of contact II respectively; So; Tangent line and mean air flow direction at the first point of contact I and II place, second point of contact; Directions X just, between the angle that forms equal the 5th angle e2.
Form the 4th angle e1 between the edge tangent line bottom of the middle and lower part fin 14 of second heat exchanger fin 12 and the mean air flow direction.Because the edge of the middle and lower part fin 14 of second heat exchanger fin 12 is the continuous arc that bends towards axial-flow fan 9; So along the direction bottom of the top fin 14 towards the middle and lower part of lower fins 14 therefrom, the 3rd angle e that forms between the edge tangent line of the middle and lower part fin 14 of second heat exchanger fin 12 and the mean air flow direction is reduced to the 4th angle e1 continuously from the 5th angle e2.
As shown in Figure 7, can know that by formula one when the 3rd angle e spent near 90 more, then the width of fin was wide more, otherwise, then narrow more.
The 6th angle e3 between the edge tangential direction of the upper fins 13 of first heat exchanger fin 11 and second heat exchanger fin 12 and the feed direction X and the 5th angle e2 approach 90 degree.Wherein, the 5th angle e2 can equal the 6th angle e3, also can be not equal to the 6th angle e3, such as: the 5th angle e2 spends to the angular range between 90 degree 75, and this angular range comprises 90 degree certainly.The 4th angle e1 between the lower-most edge tangential direction of the middle and lower part fin 14 of second heat exchanger and the feed direction X is less, such as spending between 60 degree 30.
Width A=B * the Sin (e) of the heat exchanger fin that processes like this is because the 5th angle e2 and the 6th angle e3 are bigger, so the width of the upper fins 13 in first heat exchanger fin 11 and second heat exchanger fin 12 is bigger.Because upper fins 13 places of first heat exchanger fin 11 and second heat exchanger fin 12 are near the air inlet 5 of air-flow, so wind speed is bigger, so adopt the fin of broad can improve the heat exchanger ability.In addition; Because the edge of the middle and lower part fin 14 of second heat exchanger fin 12 and the 3rd angle e between the feed direction X are reduced to the 4th angle e1 continuously from the 5th angle e2, so the width of the middle and lower part fin 14 of second heat exchanger fin 12 progressively narrows down to B * Sin (e1) from B * Sin (e2) continuously.Like this, can reduce because the disturbance that change width and connection transition position flow and cause air.And, because the wind speed of the middle and lower part fin 14 of second heat exchanger fin 12 progressively reduces from top to bottom, thus middle and lower part fin 14 progressively narrow down can the better utilization fin exchange capability of heat, improve the ability of heat exchanger.
With respect to the middle part of the existing whole folding type fin among Fig. 8, the part of dotted line among the figure just, the thickness that second heat exchanger fin 12 in the present embodiment has the middle part is little, angle changes little and transition characteristics stably.
In addition, can the windward edge of the middle and lower part fin 14 of second heat exchanger fin 12 and leeward edge be designed to simultaneously circular-arc so that Mould Machining and maintenance.The radius R of this circular arc is greater than the radius of axial-flow fan.If the radius R of circular arc is too small, can bring the angle and the change width of middle and lower part fin 14 of second heat exchanger fin 12 rapid, increase disturbance to air-flow, increase flowing resistance.In addition; For the wind speed of middle and lower part fin 14 lower portion that promote second heat exchanger fin 12 in the technique scheme, that the diameter of second heat-transfer pipe 15 of the upper fins 13 of second heat exchanger fin 12 and vicinity, middle and lower part fin 14 junction is bigger than the diameter of first heat-transfer pipe 10 of other parts of fin.
The upper fins 13 of second heat exchanger fin 12 of the heat exchanger in the technique scheme and first heat exchanger fin 11 are because wind speed is bigger; So adopt the less heat-transfer pipe of 2～3 comb spacings; And the middle and lower part fin 14 of second heat exchanger fin 12 is because wind speed is less, so adopt the bigger heat-transfer pipe of 1～2 comb spacing.Can improve the operating efficiency of whole fin like this, improve the ability to work of heat exchanger.Certainly, the heat-transfer pipe here is first heat-transfer pipe 10 and/or second heat-transfer pipe 15 as required.
The present invention adopts the thicker heat-transfer pipe of caliber respectively at the refrigerant porch and the refrigerant exit place of fin-tube heat exchanger; Such as caliber is φ 6mm～φ 9mm; And adopt 1～2 tunnel stream; Improve the flow velocity of refrigerant in the monophase field at refrigerant porch and refrigerant exit place, improve its exchange capability of heat; Two-phase region at the middle part of fin-tube heat exchanger adopts the thinner heat-transfer pipe of caliber, is φ 3mm～φ 6mm such as caliber, and adopts 3～8 tunnel stream, reduces the refrigerant flow resistance of refrigerant in the gas-liquid two-phase region.The heat-transfer pipe here is first heat-transfer pipe 10 and/or second heat-transfer pipe 15 as required.
In addition, the pipe number that designs the heat-transfer pipe that each stream flows through is identical, and the caliber of heat-transfer pipe is also identical.Like this can be so that refrigerant is flowed through the pressure loss of each stream approaching as far as possible, can make that the shunting of each stream is even as much as possible.The heat-transfer pipe here is first heat-transfer pipe 10 and/or second heat-transfer pipe 15 as required.
Claims (9)
1. fin-tube heat exchanger; Be arranged in the indoor set framework (7) of bringing air port (5) and air outlet (6) into; Also be provided with axial-flow fan (9) in the indoor set framework (7); Fin-tube heat exchanger be arranged on axial-flow fan (9) around, it is characterized in that fin-tube heat exchanger comprises first heat exchanger fin (11) and second heat exchanger fin (12), second heat exchanger fin (12) comprises upper fins (13) and middle and lower part fin (14); This middle and lower part fin (14) edge is a camber line; The flow through mean air flow direction of whole second heat exchanger fin (12) of setting is a directions X, and along this mean air flow direction, second heat exchanger fin (12) windward edge and the distance (B) between the leeward edge everywhere equates;
Wherein, the leeward edge (20) of middle and lower part fin (14) is tangential on first point of contact (I) with the leeward edge (18) of upper fins (13), and the windward edge (21) of middle and lower part fin (14) is tangential on second point of contact (II) with the windward edge (19) of upper fins (13);
First point of contact (I) is parallel with the mean air flow direction with the line between second point of contact (II).
2. fin-tube heat exchanger according to claim 1; The edge that it is characterized in that the upper fins (13) of said first heat exchanger fin (11) and second heat exchanger fin (12) is a straight line; The width of the upper fins (13) of first heat exchanger fin (11) and second heat exchanger fin (12) is identical; And first heat exchanger fin (11) and second heat exchanger fin (12) are assembled in indoor set framework (7) when interior; The edge tangent line of the upper fins (13) of second heat exchanger fin (12) and first angle (a) between the vertical line are between 25 °～45 °, and the edge tangent line of first heat exchanger fin (11) and second angle (b) between the vertical line are between 25 °～45 °.
3. fin-tube heat exchanger according to claim 2; It is characterized in that forming the 5th angle (e2) between edge tangent line and the mean air flow direction of upper fins (13) of said second heat exchanger fin (12); Also form the 5th angle (e2) between edge tangent line of the top of the middle and lower part fin (14) of second heat exchanger fin (12) and the mean air flow direction
Form the 4th angle (e1) between the edge tangent line bottom of the middle and lower part fin (14) of second heat exchanger fin (12) and the mean air flow direction, and the 5th angle (e2)＞the 4th angle (e1),
Wherein, Be positioned at middle and lower part fin (14) the top and middle and lower part fin (14) bottom between edge tangent line and the mean air flow direction of part between form the 3rd angle (e); Along the direction bottom of the top fin (14) towards the middle and lower part of lower fins (14) therefrom, the 3rd angle (e) gradually reduces the 4th angle (e1) from the 5th angle (e2).
4. fin-tube heat exchanger according to claim 3; The windward edge (21) and the circular arc that leeward edge (20) are same radius (R), identical radian measure that it is characterized in that the middle and lower part fin (14) of said second heat exchanger fin (12), and the radius of this circular arc (R) is greater than the radius of axial-flow fan (9).
5. fin-tube heat exchanger according to claim 4; It is characterized in that said second heat exchanger fin (12) middle and lower part fin (14) the upper end and rely on first point of contact (I) and second point of contact (II) near the diameter of second heat-transfer pipe (15), bigger than the diameter of first heat-transfer pipe (10) that is positioned at other parts of middle and lower part fin (14).
6. according to the arbitrary described fin-tube heat exchanger of claim 1 to 5, it is characterized in that said first heat exchanger fin (11) and second heat exchanger fin (12) axial-flow fan (9) fold over the shape of falling V, second heat exchanger fin (12) is c-shaped.
7. the preparation method of a fin-tube heat exchanger according to claim 1; It is characterized in that said first heat exchanger fin (11) and second heat exchanger fin (12) adopt the mode of continuous punching press to make respectively; Wherein, the feeding method of second heat exchanger fin (12) is: the feed direction of second heat exchanger fin (12) is the mean air flow direction along whole second heat exchanger fin (12) of flowing through; Per step feed length is to equate at windward edge on the mean air flow direction and the distance (B) between the leeward edge along this mean air flow direction and with second heat exchanger fin (12); The feeding method of first heat exchanger fin (11) is identical with second heat exchanger fin (12) with per step feed length;
Said first heat exchanger fin (11) and second heat exchanger fin (12) at first connect together and adopt the mode of continuous punching press to make simultaneously; Feed direction is the mean air flow direction along whole second heat exchanger fin (12) of flowing through; Per step feed length is to equate at windward edge on the mean air flow direction and the distance (B) between the leeward edge along this mean air flow direction and with second heat exchanger fin (12); Then, first heat exchanger fin (11) and second heat exchanger fin (12) are separated again through excision the 3rd corner part (24).
8. the preparation method of fin-tube heat exchanger according to claim 7; The upper fins (13) and the heat-transfer pipe in first heat exchanger fin (11) that it is characterized in that second heat exchanger fin (12) are 2～3 rows, and the heat-transfer pipe in the middle and lower part fin (14) of second heat exchanger fin (12) is 1～2 row.
9. according to the preparation method of claim 7 or 8 described fin-tube heat exchangers; It is characterized in that adopting the thicker heat-transfer pipe of caliber respectively at the refrigerant porch and the refrigerant exit place of fin-tube heat exchanger; And adopt 1～2 tunnel stream; Improve the flow velocity of refrigerant in the monophase field at refrigerant porch and refrigerant exit place, improve its exchange capability of heat; Two-phase region at the middle part of fin-tube heat exchanger adopts the thinner heat-transfer pipe of caliber, and adopts 3～8 tunnel stream, reduces the refrigerant flow resistance of refrigerant in the gas-liquid two-phase region.
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| CN2010102404016A CN101907374B (en) | 2010-07-23 | 2010-07-23 | Finned tube type heat exchanger and manufacture method thereof |
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| CN2010102404016A CN101907374B (en) | 2010-07-23 | 2010-07-23 | Finned tube type heat exchanger and manufacture method thereof |
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| CN101907374B true CN101907374B (en) | 2012-07-18 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103277943A (en) * | 2013-05-31 | 2013-09-04 | 向运明 | Heat exchanger |
| CN106051933B (en) * | 2016-08-16 | 2022-09-13 | 珠海格力电器股份有限公司 | Air conditioner indoor unit and air conditioner |
| CN106322535A (en) * | 2016-09-20 | 2017-01-11 | Tcl空调器(中山)有限公司 | Indoor unit of air conditioner and air conditioner |
| US20220404039A1 (en) * | 2019-10-23 | 2022-12-22 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Heat exchanger fin, heat exchanger, indoor unit and air conditioner |
| CN110701941B (en) * | 2019-10-23 | 2021-07-20 | 广东美的暖通设备有限公司 | Heat exchanger fin, heat exchanger, indoor unit and air conditioner |
| CN110848814B (en) * | 2019-11-28 | 2021-10-08 | 广东美的暖通设备有限公司 | Heat exchanger fin, heat exchanger, indoor unit and air conditioner |
| CN110701942B (en) * | 2019-10-23 | 2021-10-08 | 广东美的暖通设备有限公司 | Heat exchanger fin, heat exchanger, indoor unit and air conditioner |
| CN112923437B (en) * | 2019-12-06 | 2023-03-14 | 广东美的白色家电技术创新中心有限公司 | Indoor unit of air conditioner |
| CN112283794B (en) * | 2020-10-28 | 2023-12-12 | 青岛海信日立空调系统有限公司 | Indoor air conditioner and fin production method |
| CN215260159U (en) | 2021-07-28 | 2021-12-21 | 广东美的制冷设备有限公司 | Heat exchanger assembly and air conditioner indoor unit with same |
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