KR20170088605A - Exchanger - Google Patents
Exchanger Download PDFInfo
- Publication number
- KR20170088605A KR20170088605A KR1020160008688A KR20160008688A KR20170088605A KR 20170088605 A KR20170088605 A KR 20170088605A KR 1020160008688 A KR1020160008688 A KR 1020160008688A KR 20160008688 A KR20160008688 A KR 20160008688A KR 20170088605 A KR20170088605 A KR 20170088605A
- Authority
- KR
- South Korea
- Prior art keywords
- tube
- louver
- heat exchanger
- width direction
- thickness
- Prior art date
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/126—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element consisting of zig-zag shaped fins
- F28F1/128—Fins with openings, e.g. louvered fins
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
- F28F1/12—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
- F28F1/24—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely
- F28F1/32—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element and extending transversely the means having portions engaging further tubular elements
- F28F1/325—Fins with openings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/007—Auxiliary supports for elements
- F28F9/013—Auxiliary supports for elements for tubes or tube-assemblies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0202—Header boxes having their inner space divided by partitions
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2215/00—Fins
- F28F2215/08—Fins with openings, e.g. louvers
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Description
The present invention relates to a heat exchanger, and more particularly to a heat exchanger including a tube including a plurality of inner holes into which an inner space is divided by a partition wall, a plurality of louvers interposed between the tubes, And a fin formed by arranging the louvers so as to correspond to the inner holes of the tubes, thereby improving the heat transfer performance between the tubes and the pin louvers.
In recent years, interest in environment and energy has increased in the automobile industry, and studies for improving fuel efficiency have been made. In particular, since it is necessary to satisfy the various regulations such as the pedestrian protection law and various consumer's desires, , Research and development for miniaturization and high performance are being carried out steadily.
The fin for the heat exchanger is a major component of the heat exchanger interposed between the adjacent tubes to increase the area of contact with the air to increase the heat exchange efficiency. Researches and developments have been continued to maximize the heat dissipation performance of such heat exchanger fins.
At this time, the fin is stacked up and down, and is used as a waveform. In order to maximize the heat exchange efficiency, air flows between the upper and lower layers of the fins to increase the heat exchanging area. In order to increase the heat exchange area, louvers in the form of scales are formed on the fins.
As a related art, a louver fin for a heat exchanger has been disclosed in Korean Patent No. 1225597 (entitled Louver Fin for Heat Exchanger).
A conventional louver fin for a vehicle heat exchanger is shown in Fig. In the heat exchanger for exchanging the inside circulating fluid and the outside air such as the evaporator, the condenser or the radiator of the automobile air conditioner, the
The
Therefore, the
1 (b) and 1 (c), the incised portion is bent obliquely with respect to the direction of the air flow, Shaped
In other words, the louver pins are formed to allow the air to escape through the louvers, so that the heat transfer efficiency is much higher than that of the louver-free fins because turbulence is generated in the air flow.
The heat exchange between the fin and the air is caused by the convective heat transfer. In the case of the convective heat transfer, the heat transfer is much better when the turbulence flow than by the laminar flow.
In more detail, a boundary layer is formed as shown in FIG. 2 in a portion where a fluid and a solid generally meet and flow starts. At the interface between the fluid and the solid, that is, at the surface of the solid, the flow velocity of the fluid is always zero. The slope of the flow velocity gradually increases from the solid surface to the vertical direction. Theoretically, Position, the fluid flows at a flow rate when there is no solid.
At this time, as shown in Fig. 2, it is the boundary layer which goes up from the solid surface in the vertical direction to the points near the original flow rate.
In this boundary layer, heat transfer occurs due to diffusion rather than convection, that is, conduction of the fluid. In the fluid, heat transfer due to convection occurs much better than heat transfer by conduction. Therefore, in order to increase heat transfer efficiency, do. The louver fin is a structure provided to prevent the formation of such a boundary layer.
3 is an analysis of the heat distribution of the air passing through the louver fins of the condenser. In this case, the air is gradually heated through the louver fins located at the inlet side from the louver fins located at the inlet side in the flow direction Able to know.
As described above, the louver fins have a certain angle and are inclined from forward to backward in the direction of air flow. The air starts heat transfer through contact with the louvers at the front of the louver fins, To the surface of the louver. In this case, the heat transfer coefficient increases due to the turbulence of air, but the turbulence is not sufficiently generated in the flow toward the rear end of the louver, and the boundary layer development can not be sufficiently suppressed, so that the heat exchange efficiency at the rear end of the louver becomes lower than the front end.
In other words, the heat exchange efficiency in the louver fin as shown in Fig. 3 can be seen that the front end of the louver is best when viewed from each louver.
For reference, there are two types of heat exchange in the heat exchange between refrigerant and air.
Q total = Q1 (refrigerant → tube → air) + Q2 (refrigerant → tube → pin → air)
At this time, the heat transfer efficiency in Q2 is much higher than Q1, and in Q2 heat transfer, the majority of the heat exchange occurs in the louver of the pin.
However, as described above, simply forming a louver on the pin can not sufficiently increase the heat exchange efficiency. In order to actually obtain the effect of increasing the heat exchange efficiency, it is necessary to suggest a way to optimize the arrangement structure of the louver and the tube by considering the heat transfer characteristic such as Q2 and the heat exchange efficiency characteristic in the louver fin.
SUMMARY OF THE INVENTION The present invention has been conceived to solve the problems as described above, and it is an object of the present invention to provide a tube having a plurality of inner holes in which an inner space is separated by a partition wall, A plurality of louvers for passing air therethrough are formed and the louvers are formed so as to correspond to the inner holes of the tubes, thereby improving the heat transfer performance between the tubes and the pin louvers.
The heat exchanger of the present invention comprises a pair of header tanks spaced apart from each other by a predetermined distance; A tube having both ends fixed to the header tank to form a flow path of the heat exchange medium and having a plurality of
The heat exchanger may have a
nT web + nT hole = aLp (1)
In addition, the heat exchanger may be formed so that one side inner surface in the width direction of the
In addition, the
The
In addition, the thickness (T1) of the
In addition, the
The
In addition, the
In addition, the
The heat exchanger of the present invention includes a tube including a plurality of inner holes in which an inner space is separated by a partition wall, a plurality of louvers interposed between the tubes to be sloped at a predetermined angle to pass air therethrough, The heat transfer performance between the tube and the pin louver is improved by including the fin disposed to correspond to the inner hole of the tube.
That is, the heat exchanger of the present invention is disposed such that the front end portion of the louver having the best heat exchange efficiency is located inside the inner hole of the tube, which is a region where the refrigerant actually flows, thereby improving heat exchange efficiency.
In the heat exchanger of the present invention, one side or both sides of the tube are contacted in the thickness direction of the tube and the tubes interposed between adjacent tubes, and the surface from one side to the other side in the width direction of the contacting side is flat, The heat transfer area is increased compared with a tube having an outer round in the past, and heat exchange performance can be improved.
1 is a view showing a louver fin of a conventional heat exchanger;
2 is a conceptual illustration of a boundary layer in a louver fin.
Fig. 3 is an analysis of the heat distribution of the louver fins. Fig.
Figures 4 to 6 are partial cross-sectional views schematically showing the arrangement of tubes and fins in the heat exchanger of the present invention.
7 is a cross-sectional view of a tube in a heat exchanger according to the present invention.
8 is a cross-sectional view of yet another embodiment of a tube in a heat exchanger according to the present invention.
9 is a cross-sectional view of yet another embodiment of a tube in a heat exchanger according to the present invention.
Hereinafter, the heat exchanger of the present invention as described above will be described in detail with reference to the accompanying drawings.
The heat exchanger of the present invention is largely formed by including a header tank (not shown), a
The header tank is a pair of header tanks spaced apart from each other by a predetermined distance in the longitudinal direction or the height direction of the heat exchanger, and the header tank is formed such that the refrigerant is introduced or discharged.
The
At this time, the heat exchange medium flowing inside the
Particularly, the heat exchanger of the present invention includes a plurality of
The reason for this is that the air starts to transfer heat through the contact with the
That is, in the heat exchanger of the present invention, the front end portion of the
FIGS. 4-6 illustrate various embodiments in which the
The heat exchanger of the present invention may have a
nT web + nT hole = aLp (1)
4, in the heat exchanger in which one
T web + T hole = Lp (Equation 2)
At this time, the
That is, the
In the embodiment shown in FIG. 5, one
2T web + 2T hole = Lp (Equation 3)
At this time, the
In the embodiment shown in FIG. 6, two
T web + T hole = 2Lp (Equation 4)
At this time, the front end of the
The number n of the
The heat exchanger of the present invention is arranged such that the front end portion of the
Meanwhile, the
At this time, the heat transfer area increases as the contact area of the
To this end, the
That is, since the
The
At this time, the
FIG. 7 shows an example in which the thicknesses of the surfaces located on both sides in the width direction are formed to have a uniform thickness. FIG. 8 shows a
The protrusion height a2 of the stiffening
In addition, as shown in FIG. 9, both ends of the
Accordingly, the entire area of the
It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims. It goes without saying that various modifications can be made.
100: pin
110: Louver
200: tube
210: partition wall 220: inner hole
230: Stiffness steel section
Claims (10)
A tube having both ends fixed to the header tank to form a flow path of the heat exchange medium and having a plurality of inner holes 220 separated from each other in the width direction by a plurality of partition walls 210 extending in the longitudinal direction, 200); And
A plurality of louvers 110 interposed between the tubes 200 and sloping at a predetermined angle to allow air to pass therethrough are formed and the louvers 110 are arranged to correspond to the inner holes 220 of the tubes 200 A pin (100) formed on the base (100); Wherein the heat exchanger is formed to include the heat exchanger.
The heat exchanger
when a number of the louvers 110 correspond to the n inner holes 220,
Wherein the louver 110 pitch Lp of the fin 100, the thickness T web of one partition wall 210, and the width T hole of the inner hole 220 satisfy the following expression (1) heat transmitter.
nT web + nT hole = aLp (1)
The heat exchanger
Is formed so that one side inner surface in the width direction of the inner hole (220) and one side edge of the louver (110) are located on the same line.
The tube (200)
Wherein one side or both side surfaces are in contact with the fin (100) interposed between the neighboring tubes (200), and a flat surface is formed from one side end to the other side in the width direction of the contacting surface. .
The tube (200) and the pin (100)
And the lengths of the contacting surfaces are equal to each other.
The tube (200)
Characterized in that the thickness (T1) of the faces located on both sides in the width direction is thicker than the thickness (T2) of the faces located on both sides in the thickness direction.
The tube (200)
And a stiffening steel portion (230) having inner surfaces of the surfaces located on both sides in the width direction protruding inward.
The tube (200)
Wherein the projecting height a2 of the rigid beam guiding steel portion 230 is formed to be equal to or greater than the distances a1 and a3 reaching the both ends of the rigid beam guiding steel portion 230 in the thickness direction at each corner.
The tube (200)
And both ends are formed in a round shape in the width direction.
The tube (200)
(A) of both side faces in the width direction is formed thicker than the thickness (B) of both side faces in the thickness direction.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160008688A KR101977797B1 (en) | 2016-01-25 | 2016-01-25 | Exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020160008688A KR101977797B1 (en) | 2016-01-25 | 2016-01-25 | Exchanger |
Publications (2)
Publication Number | Publication Date |
---|---|
KR20170088605A true KR20170088605A (en) | 2017-08-02 |
KR101977797B1 KR101977797B1 (en) | 2019-05-14 |
Family
ID=59652013
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020160008688A KR101977797B1 (en) | 2016-01-25 | 2016-01-25 | Exchanger |
Country Status (1)
Country | Link |
---|---|
KR (1) | KR101977797B1 (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19980048652A (en) * | 1996-12-18 | 1998-09-15 | 구자홍 | Heat exchanger for evaporator |
JP2005055108A (en) * | 2003-08-06 | 2005-03-03 | Matsushita Electric Ind Co Ltd | Heat exchanger |
JP2010038477A (en) * | 2008-08-07 | 2010-02-18 | Tokyo Radiator Mfg Co Ltd | Porous tube for heat exchange |
KR101225597B1 (en) | 2006-09-04 | 2013-01-24 | 한라공조주식회사 | A Louver Fin for a Heat-Exchanger |
-
2016
- 2016-01-25 KR KR1020160008688A patent/KR101977797B1/en active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR19980048652A (en) * | 1996-12-18 | 1998-09-15 | 구자홍 | Heat exchanger for evaporator |
JP2005055108A (en) * | 2003-08-06 | 2005-03-03 | Matsushita Electric Ind Co Ltd | Heat exchanger |
KR101225597B1 (en) | 2006-09-04 | 2013-01-24 | 한라공조주식회사 | A Louver Fin for a Heat-Exchanger |
JP2010038477A (en) * | 2008-08-07 | 2010-02-18 | Tokyo Radiator Mfg Co Ltd | Porous tube for heat exchange |
Also Published As
Publication number | Publication date |
---|---|
KR101977797B1 (en) | 2019-05-14 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US9689628B2 (en) | Oil cooler with inner fin | |
EP3040670A1 (en) | Heat exchanger, in particular a condenser or a gas cooler | |
US20230003467A1 (en) | Heat exchanger and corrugated fin | |
CN107709917B (en) | Inner fin of heat exchanger | |
US20080000627A1 (en) | Heat exchanger | |
JPWO2016043340A1 (en) | Corrugated fin for heat exchanger | |
CN112368535B (en) | Heat exchanger | |
JP2015078819A (en) | Inner fin | |
KR20110072005A (en) | The heat exchanger | |
US11506457B2 (en) | Header plateless type heat exchanger | |
KR101977797B1 (en) | Exchanger | |
JP7229986B2 (en) | heat exchanger tank structure | |
WO2019229180A1 (en) | A core of a heat exchanger comprising corrugated fins | |
JP2010255864A (en) | Flat tube and heat exchanger | |
JP2016205718A (en) | Heat exchanger | |
JP5772608B2 (en) | Heat exchanger | |
KR20170044965A (en) | A tube of heat exchanger | |
JP2009236470A (en) | Heat exchanger | |
JP2019219139A (en) | Corrugated fin for heat exchanger | |
CN113557403B (en) | Heat exchanger | |
KR101160665B1 (en) | Heat exchanger | |
KR102350040B1 (en) | A tube of heat exchanger and heat exchanger with the same | |
KR20110080899A (en) | Fin for heat exchanger | |
WO2021161680A1 (en) | Heat exchanger bracket | |
JP2011158130A (en) | Heat exchanger |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
A201 | Request for examination | ||
E902 | Notification of reason for refusal | ||
E701 | Decision to grant or registration of patent right | ||
GRNT | Written decision to grant |