CN103162563B - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
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- CN103162563B CN103162563B CN201310076919.4A CN201310076919A CN103162563B CN 103162563 B CN103162563 B CN 103162563B CN 201310076919 A CN201310076919 A CN 201310076919A CN 103162563 B CN103162563 B CN 103162563B
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Abstract
The present invention proposes a kind of heat exchanger, have and be spaced from each other predetermined distance and the heat exchanger tube of multiple fin of laminated configuration and the through fin of stacked direction along multiple fin, fin has multiple slit portions of die-cut in the stacking direction, and this multiple slit portion is set up in parallel along the flow direction of gas, fin corresponds to the guide part that the entrance point of gas on multiple slit portion and/or the port of export are provided with to guide gas to flow.Be positioned at gas and play air-flow guiding function at the guide part of the entrance point of multiple slit portion, guide gas to be close to heat exchange tube wall or fin surface flowing, be conducive to improving heat transfer effect; Be positioned at gas and can carry out rectification to the turbulent flow after flowing through multiple slit portion at the guide part of the port of export of multiple slit portion, play stable wake flow, be conducive to reducing wake vortices.
Description
Technical field
The present invention relates to a kind of heat exchanger.
Background technology
The ability of air-conditioning and the performance of heat exchanger closely related, and the performance of heat exchanger and fin are closely related, and this fin mainly comprises plate fin, corrugated fin, crack fin etc., and wherein crack fin is most widely used.Under the prerequisite rationally improving a fin pitch of fins, optimized fin structure, the heat exchange property of crack fin is better than corrugated fin.
At present, crack fin has the calking forms such as single bridge, doube bridge, X-type, and different calking forms determines the quality of fin heat exchange property.X-type crack fin is applicable to little spacing of fin, and large spacing of fin causes exchange capability of heat to decline, but under little spacing of fin, the heat exchanger of unit length needs more fin, causes complete machine cost increase.Meanwhile, under little spacing of fin, X-type crack fin also exists resistance to be increased, the problem of air flow difficulties.
Summary of the invention
In view of this, main purpose of the present invention is, provides a kind of and is conducive to improving heat transfer effect and the heat exchanger reducing water heater cost.
For achieving the above object, the present invention proposes a kind of heat exchanger, have and be spaced from each other predetermined distance and the heat exchanger tube of multiple fin of laminated configuration and the through described fin of stacked direction along described multiple fin, described fin has the multiple slit portions along die-cut of described stacked direction, and this multiple slit portion is arranged side by side along the flow direction of gas, described fin corresponds to the guide part that the entrance point of gas on described multiple slit portion and/or the port of export are provided with to guide gas to flow.
In the present invention, described fin corresponds to the guide part that the entrance point of gas on described multiple slit portion and/or the port of export are provided with to guide gas to flow, wherein, be positioned at gas and play air-flow guiding function at the guide part of the entrance point of described multiple slit portion, guide gas to be close to described heat exchange tube wall or fin surface flowing, be conducive to improving heat transfer effect; Be positioned at gas and can carry out rectification to the turbulent flow after flowing through described multiple slit portion at the guide part of the port of export of described multiple slit portion, play stable wake flow, be conducive to reducing wake vortices.
Preferably, described multiple slit portion comprises the first slit portion of projecting upwards relative to the datum level of described fin and second slit portion outstanding relative to the datum level of described fin downwards, and described first slit portion and the second slit portion are arranged alternately along the flow direction of gas.
Because described first slit portion and the second slit portion flow direction along gas is arranged alternately, the gas passage that supplied gas flows through can be formed in the side, two sides of described fin respectively, effectively can destroy the boundary layer of gas, be conducive to improving heat transfer effect.
Preferably, form the first slot set by least two that are disposed adjacent described first slit portions, form the second slot set by least two that are disposed adjacent described second slit portions, described first slot set and the second slot set are arranged alternately along the flow direction of gas.
Preferably, described first slit portion and the second slit portion in wave shape, in described first slot set and the second slot set, the first slit portion be disposed adjacent and the crest of the second slit portion interlace out.Adopt said structure can form more gas passage, effectively can be destroyed the boundary layer of gas by this multiple gas passage, be conducive to improving heat transfer effect.
Preferably, in described first slot set and the second slot set, the crest of described first slit portion and the second slit portion increases gradually along the flow direction of described gas respectively.
Adopt said structure, more gas passage can be formed respectively in the side, two sides of described fin, and make formed gas passage along the stepped distribution of flow direction of gas, effectively can destroy the boundary layer of gas, enhanced heat exchange, can accelerate gas disturbance, is conducive to improving heat transfer effect.
Preferably, described multiple slit portion to go out and along the flow direction arrangement of described gas in X-shaped towards a pleurapophysis of described fin.
Preferably, described guide part is the 3rd slit portion along die-cut of described stacked direction, 3rd slit portion and described multiple slit portion are arranged side by side, described 3rd slit portion relative to the projecting height of the datum level of described fin between the maximum projecting height of described multiple slit portion relative to the datum level of described fin.
Preferably, described multiple slit portion is 0.7 ~ 1.1mm relative to the maximum projecting height of the datum level of described fin.
Preferably, described 3rd slit portion is multiple, and this multiple 3rd slit portion is arranged along the interval, direction perpendicular to described stacked direction and described gas flow direction, is provided with projection, at least forms inclined plane part on the windward side of this projection between adjacent described 3rd slit portion.
Preferably, the spacing of fin of adjacent described fin on described stacked direction is 1.6 ~ 1.9mm, the number of fins that the heat exchanger that can reduce unit length has, and is conducive to the cost reducing heat exchanger.
Accompanying drawing explanation
Fig. 1 is the front view of heat exchanger, is the first embodiment;
Fig. 2 is the right side view of heat exchanger shown in Fig. 1;
Fig. 3 is the upward view of heat exchanger shown in Fig. 1;
Fig. 4 is the oblique view of a slit group on fin;
The front side that Fig. 5 is the group of slit shown in Fig. 4 or lateral side view;
Fig. 6 is the top view of the group of slit shown in Fig. 4;
Fig. 7 is the generalized section of each slit portion in Fig. 6, (a) for A-A to generalized section, (b) for B-B to generalized section, (c) for C-C to generalized section, (d) for D-D to generalized section, (e) for E-E to generalized section, (f) for F-F to generalized section, (g) for G-G to generalized section, (h) for H-H to generalized section;
Fig. 8 be in Fig. 6 N-N to, M-M to and K-K to generalized section, (n) for N-N to generalized section, (m) for M-M to generalized section; (k) for K-K to generalized section;
Fig. 9 is air themperature distribution schematic diagram between fin, and (a) is corrugated fin temperature profile, and (b) is the temperature profile of fin shown in Fig. 1;
Figure 10 is air layer speed field pattern between fin, and (a) is air layer speed field pattern between corrugated fin, and (b) is air layer speed field pattern between fin shown in Fig. 1;
The contrast schematic diagram that Figure 11 is the coefficient of heat transfer of fin shown in corrugated fin and Fig. 1;
Figure 12 is the top view of the fin being provided with slit group, is the second embodiment;
Figure 13 is air themperature distribution schematic diagram between fin, and (a) is X-type fin temperature profile, and (b) is the temperature profile of fin shown in Figure 12.
Detailed description of the invention
With reference to the accompanying drawings the detailed description of the invention of heat exchanger of the present invention is described in detail.
As shown in FIG. 1 to 3, heat exchanger 1 has multiple fin 2 and the heat exchanger tube 3 be arranged on this fin 2.This multiple fin 2 is spaced from each other the interval of regulation by the mode that gas can pass through and stacked arrangement is in a row.As shown in table 1, the spacing of fin Pf between adjacent fins 2 is 1.9mm, and single fin 2 is rectangle usually, and the thickness δ f of this fin 2 is 0.11mm, and its width Pc is 17.32mm.Each fin 2 is offered multiple installing holes 4 that the stacked direction along fin 2 aligns along its length, and the aperture 2R(R of this installing hole 4 is radius) be 7.53mm, the spacing Pr between adjacent installing hole 4 is 20mm.Single heat exchange tube 3 generally takes the shape of the letter U, the straight line portion of this U-shaped along the stacked direction of fin 2 successively through each installing hole 4 aligned, the end of adjacent heat exchange tubes 3 is communicated with by elbow, so repeats, and heat exchanger tube 3 is arranged on fin 2 by roundabout reciprocal mode.Data can be found out as shown in Table 1, compare with corrugated fin with X-type fin, when the aperture of the width of fin, thickness, installing hole 4 is substantially identical with parameters such as pitchs of holes, in the present embodiment, the spacing of fin of fin is obviously greater than the spacing of fin of X-type fin and corrugated fin, so, the quantity of the fin of the heat exchanger of unit length can be reduced, be conducive to the manufacturing cost reducing heat exchanger.
Table 1
| Fin configuration | Fin of the present invention | X-type fin | Corrugated fin |
| Fin wide (single) Pc | 17.32 | 13.3 | 18.186 |
| Fin wide (double) 2*Pc | 34.64 | 26.6 | 36.372 |
| The thick δ f of fin | 0.11 | 0.1 | 0.1 |
| Fin aperture 2R | 7.53 | 7.5 | 7.5 |
| Pitch of holes Pr | 20 | 21 | 21 |
| Spacing of fin Pf | 1.9 | 1.36 | 1.3 |
Fin 2 forms slit group between adjacent installing hole 4, as shown in Fig. 4 ~ Fig. 6, slit group comprises multiple slit portion 21a ~ 21h of die-cut of the stacked direction along fin 2, and this multiple slit portion 21a ~ 21h is set up in parallel along the flow direction (left and right directions namely in Fig. 1) of gas.As shown in Figure 7, slit portion 21a, slit portion 21b, slit portion 21e, slit portion 21f project upwards relative to the datum level of fin 2, form the first slit portion by this multiple slit portion; Slit portion 21c, slit portion 21d, slit portion 21g, slit portion 21h give prominence to downwards relative to the datum level of fin 2, form the second slit portion by this multiple slit portion.Slit portion 21a ~ 21h is all in wave shape, particularly,
As shown in Figure 7 (a), the total length of slit portion 21a is 12.59mm, and it is overall in falling " W " shape, and have two peaks, and the horizontal range between these two peaks is 8.2mm, the distance of the datum level of this peak and fin 2 is 0.7mm.
As shown in Figure 7 (b) shows, the total length of slit portion 21b is 10.54mm, and itself and slit portion 21a are distinguished as, and slit portion 21b entirety is in falling " V " shape, and only have a peak, the distance of the datum level of this peak and fin 2 is 1.1mm.
As shown in Fig. 7 (c), the total length of slit portion 21c is 9.39mm, and it is overall in " W " shape, and have two minimum points, the horizontal range between these two minimum points is 5.8mm, and the distance of the datum level of this minimum point and fin 2 is 0.7mm.
As shown in Fig. 7 (d), the total length of slit portion 21d is 8.87mm, and itself and slit portion 21c are distinguished as, and slit portion 21d entirety is V-shaped, and it only has a minimum point, and the distance of the datum level of this minimum point and fin 2 is datum level 1.1mm.
As shown in Fig. 7 (e), the total length of slit portion 21e is 8.87mm, and itself and slit portion 21a are distinguished as, and the horizontal range between two peaks of slit portion 21e is 5.6mm.
As shown in Fig. 7 (f), slit portion 21f entirety is in falling " V " shape, and itself and slit portion 21b are distinguished as, and the total length of slit portion 21b is 9.39mm.
As shown in Fig. 7 (g), the total length of slit portion 21g is 10.54mm, and slit portion 21g entirety is in " W " shape, and itself and slit portion 21c are distinguished as, and the horizontal range between two minimum points of slit portion 21g is 6.6mm.
As shown in Fig. 7 (h), slit portion 21h entirety is V-shaped, and itself and slit portion 21d are distinguished as, and the total length of slit portion 21h is 12.59mm.
Fig. 8 be in Fig. 6 N-N to, M-M to and K-K to generalized section, (k) for K-K to generalized section, (n) for N-N to generalized section, (m) for M-M to generalized section.As shown in Fig. 8 (m), slit portion 21a and slit portion 21b, slit portion 21e and slit portion 21f abutted to respectively and arrange formation first slot set, slit portion 21c and slit portion 21d, slit portion 21g and slit portion 21h abutted to respectively and arrange formation second slot set, and this first slot set and the second slot set are arranged alternatively up and down along the flow direction of gas.
As shown in Figure 4, in first slot set, slit portion 21b(or slit portion 21f) peak be just placed in slit portion 21a(or slit portion 21e) two peaks between, and along on the flow direction of gas, be in slit portion 21a(or the slit portion 21e of windward side) maximum height (0.7mm) that projects upwards relative to the datum level of fin 2 is less than slit portion 21b(or slit portion 21f) relative to the maximum height (1.1mm) projected upwards of the datum level of fin 2.In second slot set, slit portion 21d(or slit portion 21h) minimum point be just placed in slit portion 21c(or slit portion 21g) two minimum points between, further, slit portion 21c(or the slit portion 21g of windward side is in) be less than slit portion 21d(or slit portion 21h relative to the maximum height (0.7mm) outstanding downwards of the datum level of fin 2) relative to the maximum height (1.1mm) outstanding downwards of the datum level of fin 2.Adopt aforementioned structure, more gas passage can be formed respectively in the side, two sides of fin 2, and make the stepped distribution on the flow direction of gas of formed gas passage, effectively can destroy the boundary layer of gas, enhanced heat exchange, can accelerate gas disturbance, is conducive to improving heat transfer effect.
As shown in figures 4-6, slit group also comprises guide part, and this guide part is positioned at the both sides of multiple slit portion 21a ~ 21h, namely corresponds to the entrance point of gas on multiple slit portion 21a ~ 21h and the port of export.As shown in Figure 6, multiple 3rd slit portion the 23, three slit portions 23 that guide part comprises die-cut of multiple stacked direction along fin 2 are the bridge shape projection projecting upwards 0.75mm relative to the datum level of fin 2, and this bridge shape projection parallels with the datum level of fin 2.This multiple 3rd slit portion 23 is set up in parallel with multiple slit portion 21a ~ 21h, and arranges along perpendicular to the stacked direction of fin 2 and the interval, direction of gas flow direction.Between adjacent 3rd slit portion 23, be provided with protruding 22, this projection 22 is chevron (as shown in Fig. 8 (k) and (n)) along the flow direction of gas, and the inclined plane part had by this chevron can guide gas to flow along the surface of fin 2.
Drawn by contrast, the 3rd slit portion 23 projects upwards 0.75mm relative to the datum level of fin 2, and the first slit portion and the second slit portion are relative to datum level outstanding 0.7mm and 1.1mm up and down of fin 2, the former just between after between the two.Be positioned at gas the 3rd slit portion 23 air-flow guiding function at the entrance point of multiple slit portion 21a ~ 21h, gas is guided to be close to heat exchange tube wall or fin surface flowing, and guarantee, in the gas passage that gas passes through to be formed by multiple slit portion 21a ~ 21h successively, to be conducive to improving heat transfer effect.Be positioned at gas and can carry out rectification to the turbulent flow after flowing through multiple slit portion 21a ~ 21h at the 3rd slit portion 23 of the port of export of multiple slit portion 21a ~ 21h, play stable wake flow, be conducive to reducing wake vortices.
Fig. 9 is air themperature distribution schematic diagram between fin, and (a) is corrugated fin temperature profile, and (b) is the temperature profile of fin shown in Fig. 1.As can be seen from Figure 9, corrugated fin has obvious high temperate zone in the wake zone of first row (being positioned on the left of Fig. 9) and second row (being positioned on the right side of Fig. 9) heat exchanger tube, and fin of the present invention is very little in the height temperate zone, wake zone of first row heat exchanger tube, less in the high temperate zone of the wake zone of second row heat exchanger tube, can be judged by the regularity of distribution of temperature, in fin of the present invention, air-flow direction can walk " S " type along heat exchange tube wall, like this can the heat exchange of thermoexcell wake zone.
Figure 10 is air layer speed field pattern between fin, and (a) is air layer speed field pattern between corrugated fin, and (b) is air layer speed field pattern between fin shown in Fig. 1.As can be seen from Figure 10, in fin of the present invention, the region that speed air flow is the highest is the part being close to heat exchanger tube, and still have certain flowing velocity at heat exchanger tube wake zone air, the air flowing of heat exchange near-wall can be accelerated like this, the refrigerant be conducive in extraneous air and heat exchanger tube carries out heat exchange, thus improves heat transfer effect.And in corrugated fin, heat exchanger tube part is not close in the region that speed air flow is the highest, and very little at the wake zone speed air flow of heat exchanger tube, be unfavorable for heat exchange like this.Visible, shown in the speed distribution regularities shown in Figure 10 and Fig. 9, the temperature distributing rule of fin is consistent.
The contrast schematic diagram that Figure 11 is the coefficient of heat transfer of fin shown in corrugated fin and Fig. 1.Can be drawn by Figure 11, under identical intake velocity, the exchange capability of heat of fin of the present invention is greater than the exchange capability of heat of corrugated fin, it is main because fin of the present invention has the slit group shown in Fig. 4 ~ Fig. 6, more gas passage can be formed, effectively can be destroyed the boundary layer of gas by this multiple gas passage, effectively increase air agitation, be conducive to improving heat transfer effect.
In the above-described embodiments, as shown in table 1, the spacing of fin Pf between fin 2 is 1.9mm.But not limited thereto, in the present invention, the spacing of fin Pf between fin 2 can be 1.6 ~ 1.9mm, and such as, spacing of fin can be 1.6mm or 1.9mm.The impact of different fin spacing heat exchanger performance is compared below by data shown in table 2.As can be seen from Table 2, under identical intake velocity, even if spacing of fin of the present invention is greater than the spacing of fin of corrugated fin, heat transfer effect more better than corrugated fin also can be reached.The present invention, by suitably increasing the spacing of fin of fin 2, adds the gap between adjacent fins, can reduce the flow resistance of air between fin, make it flow more smooth and easy, thus accelerates the renewal speed of gas between fin, is conducive to improving heat transfer effect.Meanwhile, fin 2 quantity that the heat exchanger that the present invention can reduce unit length by the spacing of fin suitably increasing fin 2 has, is conducive to the manufacturing cost reducing heat exchanger.In addition, spacing of fin also can be the arbitrary value between 1.6 ~ 1.9mm.
Table 2
Figure 12 is the top view of the fin being provided with slit group, is the second embodiment, being distinguished as of itself and the first embodiment, and multiple slit portion goes out towards a pleurapophysis of fin 2, and this multiple slit portion arrangement is in X-shaped.Figure 13 is air themperature distribution schematic diagram between fin, and (a) is X-type fin temperature profile, and (b) is the temperature profile of fin shown in Figure 12.As shown in figure 13, compared with X-type fin, in the present embodiment fin, the disturbance of air themperature distribution obviously increases, and can destroy the boundary layer of air, thus strengthens exchange capability of heat.Data can draw as shown in Table 3, and when spacing of fin keeps identical, the exchange capability of heat of this enforcement fin is greater than the exchange capability of heat of X-type fin.
Table 3
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Such as, as shown in Fig. 8 (m), form the first slot set by two the first slit portions that abutted to setting, form the second slot set by two the second slit portions that abutted to setting, and this first slot set and the second slot set are arranged alternately.But not limited thereto, the first slit portion and the second slit portion also can be arranged alternately along the flow direction of gas successively.
Again such as, as shown in Figure 8, projection 22 is chevron along the flow direction of gas, but not limited thereto, also only can form the inclined plane part guiding gas to flow on the windward side of protruding 22.
Again such as, as shown in Figure 8,3rd slit portion 23 and protruding 22 all projects upwards relative to the datum level of fin 2, but it is not limited thereto, 3rd slit portion 23 and protruding 22 also can be given prominence to downwards relative to the datum level of fin 2, or a part the 3rd slit portion 23 projects upwards, and another part the 3rd slit portion 23 is given prominence to downwards.
Claims (5)
1. a heat exchanger, has and is spaced from each other predetermined distance and the heat exchanger tube (3) of multiple fins (2) of laminated configuration and the through described fin (2) of stacked direction along described multiple fin (2), it is characterized in that,
Described fin (2) has the multiple slit portions along die-cut of described stacked direction, described multiple slit portion comprises the first slit portion and second slit portion outstanding relative to the datum level of described fin (2) that project upwards relative to the datum level of described fin (2) downwards, the first slot set is formed by least two that are disposed adjacent described first slit portions, the second slot set is formed by least two that are disposed adjacent described second slit portions, described first slot set and the second slot set are arranged alternately side by side along the flow direction of gas, described first slit portion and the second slit portion all in wave shape, in described first slot set and the second slot set, the first slit portion be disposed adjacent and the crest of the second slit portion are staggered respectively, and the crest of described first slit portion and the second slit portion increases gradually along the flow direction of described gas respectively,
At the upper guide part corresponding to the entrance point of gas on described multiple slit portion and/or the port of export and be provided with to guide gas to flow of described fin (2).
2. heat exchanger according to claim 1, is characterized in that, described guide part is the 3rd slit portion (23) along die-cut of described stacked direction, and the 3rd slit portion (23) and described multiple slit portion are arranged side by side,
Described first slot set comprises two described first slit portions be disposed adjacent, described 3rd slit portion (23) relative to described fin (2) datum level project upwards height between the maximum projecting height of aforementioned two described first slit portions relative to the datum level of described fin (2).
3. heat exchanger according to claim 2, is characterized in that, described multiple slit portion is 0.7 ~ 1.1mm relative to the maximum projecting height of the datum level of described fin (2).
4. heat exchanger according to claim 2, it is characterized in that, described 3rd slit portion (23) is for multiple, and this multiple 3rd slit portion (23) is arranged along the interval, direction perpendicular to described stacked direction and described gas flow direction, between adjacent described 3rd slit portion (23), be provided with projection (22), at least on the windward side of this projection (22), form inclined plane part.
5. heat exchanger according to claim 1, is characterized in that, the spacing of fin of adjacent described fin (2) on described stacked direction is 1.6 ~ 1.9mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310076919.4A CN103162563B (en) | 2013-03-11 | 2013-03-11 | Heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310076919.4A CN103162563B (en) | 2013-03-11 | 2013-03-11 | Heat exchanger |
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| CN103162563A CN103162563A (en) | 2013-06-19 |
| CN103162563B true CN103162563B (en) | 2015-09-02 |
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| CN201310076919.4A Active CN103162563B (en) | 2013-03-11 | 2013-03-11 | Heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470074A (en) * | 2017-09-07 | 2019-03-15 | 美的集团股份有限公司 | Fins set and fin-tube heat exchanger |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6706839B2 (en) * | 2016-03-11 | 2020-06-10 | パナソニックＩｐマネジメント株式会社 | Fin tube heat exchanger |
| CN111043892B (en) * | 2018-10-15 | 2023-05-02 | 林内株式会社 | Heat transfer fin |
| CN111322683A (en) * | 2020-03-06 | 2020-06-23 | 青岛海信日立空调系统有限公司 | Air conditioner |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1158980A (en) * | 1995-01-23 | 1997-09-10 | Lg电子株式会社 | Fin tube heat exchanger |
| CN1197922A (en) * | 1997-04-28 | 1998-11-04 | 株式会社日立制作所 | Heat excharger |
| CN1654914A (en) * | 1999-12-15 | 2005-08-17 | Lg电子株式会社 | Fin and tube type heat-exchanger |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS616588A (en) * | 1984-06-20 | 1986-01-13 | Hitachi Ltd | Finned tube type heat exchanger |
| JPH11108575A (en) * | 1997-10-03 | 1999-04-23 | Hitachi Ltd | Heat exchanger having winglet |
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2013
- 2013-03-11 CN CN201310076919.4A patent/CN103162563B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1158980A (en) * | 1995-01-23 | 1997-09-10 | Lg电子株式会社 | Fin tube heat exchanger |
| CN1197922A (en) * | 1997-04-28 | 1998-11-04 | 株式会社日立制作所 | Heat excharger |
| CN1654914A (en) * | 1999-12-15 | 2005-08-17 | Lg电子株式会社 | Fin and tube type heat-exchanger |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109470074A (en) * | 2017-09-07 | 2019-03-15 | 美的集团股份有限公司 | Fins set and fin-tube heat exchanger |
| CN109470074B (en) * | 2017-09-07 | 2020-06-26 | 美的集团股份有限公司 | Fin group and fin tube type heat exchanger |
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| Publication number | Publication date |
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| CN103162563A (en) | 2013-06-19 |
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