KR101773664B1

KR101773664B1 - core assembly for heat exchanger manufacturing method

Info

Publication number: KR101773664B1
Application number: KR1020150071912A
Authority: KR
Inventors: 정기석
Original assignee: (주)해송엔지니어링
Priority date: 2015-05-22
Filing date: 2015-05-22
Publication date: 2017-08-31
Also published as: KR20160137173A

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a core assembly constituting a heat exchanger for cooling a fluid such as cooling water or oil, and more particularly, The present invention relates to a core assembly for a heat exchanger excellent in pressure resistance while simplifying a process and a manufacturing method thereof.

Description

Technical Field [0001] The present invention relates to a core assembly for a heat exchanger,

Generally, in driving an engine such as a ship or an automobile, the temperature of the combustion gas in the combustion chamber reaches 2,000 DEG C or more, and a considerable amount of this temperature is conducted to the cylinder, the cylinder head, the piston, and the valve.

If the temperature of such a portion becomes excessively high, the strength of the component material is lowered, resulting in failure, shortening the life span, and deteriorating the combustion state, resulting in knocking or early ignition.

Further, in the state where the cooling is incomplete, the lubricating function such as the breakage of the oil film on the cylinder wall may be deteriorated and the cooling water may be deteriorated, resulting in abnormal wear, pressing, or the like. On the contrary, if the engine is over cooled, the amount of heat lost due to cooling is large among the heat generated from the combustion, so that the thermal efficiency of the engine is lowered and the fuel consumption is increased. In this way, the cooling water (heating medium) that has passed through the engine and is heated must be cooled to a proper level through a heat exchanger. As with cooling water, engine oil and mission oil are essentially used to drive the engine. Oil (heat medium) lubricates mechanical parts such as engine cylinders and crankshafts to reduce friction and disturbances, It should be cooled through a machine.

7A is an enlarged view of part A of FIG. 7A. Referring to FIG. 7A, the heat exchanger includes an upper tank 10 having an inlet 15 through which a heating medium such as oil flows, A lower tank 20 having an outlet 25 formed therein and a core assembly 30 for cooling the oil introduced from the upper tank 10 with external air.

The core assembly is formed by first assembling the respective components of the core assembly and completing the assembly through brazing, joining the upper and lower tanks to the core assembly, and joining pipes for supplying and discharging cooling water to the upper and lower tanks &Lt; / RTI >

The core assembly 30 includes an air portion 40 including a plurality of air units 41 including an air pin 42 and a head bar 43 disposed above and below the air pin 42, (Not shown) disposed on the right and left sides of the heat exchanger 41, and the air unit and the heat medium unit are arranged alternately with respect to the plate.

The heating medium unit is composed of a pin inserted between the lower and upper plates, and a tube disposed at both ends of the fin. The plate and the tube bar are alternately laminated, so that brazing is performed on the upper and lower surfaces of the tube bar.

However, there is a problem in that the assembling process is complicated because the position where the plate and the pin and the tube bar are placed are not partitioned, and when they are not placed at the time of stacking or when the position is changed during assembly, defects occur. In addition, since the joining is performed only on the top and bottom surfaces of the tube bar, development of a core assembly having a structure capable of improving oil tightness, bonding strength and pressure resistance can be obtained when joining is not completed in some parts It is necessary.

8, in the conventional heat medium unit, the internal pressure of the heat medium unit due to the flow of oil increases as the size of the core assembly increases. Therefore, in order to prevent the internal pressure of the heat medium unit from being damaged by an impulse generated intermittently during the flow of oil, The middle bar 55 is installed on both sides of the middle bar 30. However, when the position of the middle bar disposed during the assembly process is changed, defects tend to occur, and manufacturing costs increase due to the installation of the middle bar.

1. Korean Patent No. 10-1417218 2. Korean Patent Publication No. 10-2013-0117421 3. Korean Patent No. 10-1374925

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a press- And to provide a core assembly for an excellent heat exchanger and a manufacturing method thereof.

It is also an object of the present invention to provide a core assembly for a heat exchanger and a method of manufacturing the same, which are capable of widening a joining area of a tube bar and improving bonding strength by providing a bending portion at an outer end of the lower and upper plates.

Further, the object of the present invention is to provide an apparatus and a method for assembling the tube and the tube bar in which the alignment position of the fin and the tube bar is divided through the stopping jaw and the bending portion to improve the assemblability and the dimensional stability, And the airtightness at the interface is improved, and a method of manufacturing the core assembly.

To this end, a core assembly for a heat exchanger according to the present invention is a method for manufacturing a core assembly for a heat exchanger having a structure in which a heating medium unit through which a heating medium flows and an air unit through which air exchanges heat with the heating medium are alternately stacked. Wherein a pair of bending portions are formed by bending both ends of the bending portion, and a pair of latching jaws are formed in parallel with the bending portion on the inner side of the bending portion, A step S1 of forming a lower and an upper groove to be arranged side by side with a pin joint being provided on the inner side with respect to the engaging jaw and a tube bar joint and an bending part being bent on the tube bar joint; A step S2 of laminating a tube bar on the tube bar joint portion divided by the bending portion and the engagement jaw of the lower plate, and laminating a pin on the pin joint portion defined by the pair of engagement jaws; A step S3 of stacking the upper plate so that the tube bar stacked in the step S2 is disposed on the tube bar joint part defined by the bending part of the upper plate and the engaging jaw; A step S4 of laminating an air pin on the upper plate and a pair of head bars disposed on both ends of the air pin; And a step S5 of joining the core assembly formed by sequentially repeating the steps S1 to S4, wherein at least a cladding layer is formed on the tube bar, the lower and upper plates, and the core assembly The tubular bar is joined to the lower plate by a brazing method in which the clad layer is heated and melted. The tubular bar has a hook, a tube bar and a bending part provided on the lower plate, a hook, a tube bar, Wherein the tube bar has a pair of inclined surfaces disposed in a triangular shape at an inner end thereof and a vertical surface at an outer end thereof and a pair of horizontal surfaces connecting the pair of inclined surfaces to the vertical surface, The "

And the pair of inclined surfaces are in surface contact with the inclined portions respectively provided at the engagement protrusions of the lower and upper plates and the vertex area of the inner end where the pair of inclined surfaces meet is formed in the lower and upper plates And the pair of horizontal surfaces and the vertical surfaces are brought into surface contact with the tube bar joint portion and the bending portion respectively provided on the lower and upper plates so that the pin and the tube bar are stacked on the lower plate in Step S2, And the fin and the tube bar can be aligned at an accurate position merely by laminating the upper plate in the step S3, thereby improving the assembling property.

delete

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and an object of the present invention is to provide a core assembly for a heat exchanger and a method of manufacturing the core assembly, Whereby the assembling process is simplified while the pressure resistance is excellent.

In addition, the core assembly for a heat exchanger and the method of manufacturing the same according to the present invention can increase the joining strength and the joining area of the tube bar by providing the bending portions at the outer ends of the lower and upper plates.

In addition, the core assembly for a heat exchanger and the method of manufacturing the same according to the present invention can improve the assemblability and the dimensional stability because the alignment positions of the fin and the tube bar are separated through the engagement jaw and the bending portion, Since the joining is performed at the inclined surface of the bar, the airtightness at the interface is improved.

FIG. 1 is a perspective view showing a heat exchanger equipped with a core assembly according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a plan view showing a laminated structure of an air unit and a heating medium unit.
FIG. 4 is a perspective view showing a heating medium unit according to the present invention, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a sectional view of FIG.
FIG. 7A is a perspective view showing a conventional heat exchanger, and FIG. 7B is an enlarged view of a portion A in FIG. 7A.
8 is a view showing a conventional heat exchanger structure in which a middle bar is installed.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear. In addition, the terms described below are defined in consideration of the functions of the present invention, and these may vary depending on the intention of the user, the operator, or the precedent. Therefore, the definition should be based on the contents throughout this specification.

FIG. 1 is a perspective view showing a heat exchanger equipped with a core assembly according to the present invention, FIG. 2 is a front view of FIG. 1, and FIG. 3 is a plan view showing a laminated structure of an air unit and a heating medium unit.

1 to 3, the core assembly according to the present invention is used in a heat exchanger for cooling a heating medium with air as a refrigerant. The core assembly includes an upper tank 110, a lower tank (not shown) 120).

The heating medium may be oil or water.

The high-temperature oil circulating around the engine, etc. of the vehicle flows into the upper tank 110, and a heating medium inlet 111 is formed. The core assembly 130 is moved to the lower tank 120 side through the oil introduced through the upper tank 110. In this process, the oil is cooled by the outside air. As described above, the oil that is cooled while passing through the core assembly 130 flows out to the lower tank 120 through the oil pump (not shown). For this purpose, the heating medium outlet 121 is formed.

The core assembly 130 includes a plurality of plates 161 and 161a and a plurality of first and second space portions 140 and 150 alternately arranged by the plates 161 and 161a, And a core guard 133 disposed on both sides of the core assembly 130. The air unit 151 is installed in the first space 150, have.

The heating medium unit 160 is configured such that the oil introduced through the upper tank 110 flows downward in the vertical direction through the plurality of first space portions 140 and is cooled by the air passing through the air unit 151 will be.

The air unit 151 includes an air pin 152 installed in the second space 150 and formed with a metal thin plate in a corrugated shape, And a pair of head bars 153 arranged in the direction of the arrows.

FIG. 4 is a perspective view showing a heating medium unit according to the present invention, FIG. 5 is a plan view of FIG. 4, and FIG. 6 is a sectional view of FIG.

4 to 6, the heating medium unit 160 according to the present invention includes a lower plate 161, an upper plate 161a spaced from the upper side of the lower plate 161, A first space portion 140 provided between the plates 161 and 161a and lower and upper grooves 170a and 170b which are vertically joined to one another at one side of the lower and upper plates 161 and 161a and joined to each other A central joint part 170 which divides the first space part 140 into two parts and which is disposed at one end and the other end of the first space part 140 to seal both side ends of the first space part 140; A pair of tube bars 190 and a plurality of fins 180 inserted into the partitioned first space part 140 and each having a structure in which the oil can pass therethrough in thermal contact therewith.

As the size of the core assembly 130 increases, the internal pressure of the heating unit 160 increases as the oil flows. If the internal pressure increases, the oil is easily damaged by an impulse generated intermittently when the oil flows. Conventionally, in order to prevent such damage, the middle bar is provided on both sides of the core assembly. However, since the middle bar is disposed at the correct position, the assembling process is complicated and the manufacturing cost is increased.

Therefore, in the present invention, the lower and upper grooves 170a and 170b are integrally formed on the lower and upper plates 161 and 161a by press working or the like instead of the conventional middle bar in the heating medium unit 160, 170a, and 170b to form the center joint portion 170, it is possible to reduce the labor of arranging the conventional middle bar at an accurate position, improve dimensional stability, and reduce manufacturing cost.

The central joint part 170 may be formed in the center between the both of the engagement protrusions 165, but may be formed in an appropriate number in consideration of the size of the core assembly.

Each of the lower and upper plates 161 and 161a is provided with a bending portion 163 at each end thereof so as to surround a part of the outer end surface of the tube bar 190.

When the outer end surface of the tube bar 190 is a vertical surface, the bending portion 163 is vertically bent upward and downward to be in contact with the tube bar 190.

By providing the bending portion 163 on the lower and upper plates 161 and 161a as described above, the joining strength with the tube bar 190 is widened and the bending strength is improved. Since it is structurally stable, airtightness or pressure resistance can be maximized.

The lower and upper plates 161 and 161a are formed with hooking protrusions 165 that are upwardly and downwardly projected along the boundary between the tube bar 190 and the fins 180, respectively.

The hooking jaw 165 divides a space so that the tube bar 190 can be seated together with the bending portion 163, thereby improving the assembling property and widening the joining surface, thereby enhancing the joining strength, sealing performance, and pressure resistance.

The tube bar 190 is provided with a pin joint part 167 on the inner side with respect to the stopping protrusion 165 and a tube bar joint part and a bending part bent on the tube bar joint part. The tube bar joint portion 168, and the bending portion 163, respectively.

The inclined surface 191 of the tube bar 190 may be formed at one side of the stopping protrusion 165 and the inclined surface 191 of the tube bar 190 may be formed at an inner side of the tube bar 190. [ It is preferable to provide an inclined portion 166 to be brought into contact with and bonded to the first and the second hollow portions so that the heating medium such as oil or water passing through the first space portion can surely be prevented from leaking through the interface between the plate and the tube bar.

Hereinafter, preferred embodiments of a method of manufacturing a core assembly for a heat exchanger according to the present invention will be described in detail.

The method for manufacturing a core assembly for a heat exchanger according to the present invention is characterized in that the lower and upper plates 161 and 161a are provided and both end portions are bent to form a pair of bending portions 163, The upper and lower plates 161 and 161a are formed with a pair of latching protrusions 165 that are in parallel to the lower and upper grooves 170a and 170b so as to be disposed side by side between the pair of latching protrusions 165, A tube bar 190 is stacked between the bending portion 163 of the lower plate 161 and the stopping protrusion 165 and between the pair of stopping protrusions 165, The upper plate 161a is stacked such that the tube bar 190 is disposed between the bending portion 163 of the upper plate 161a and the engaging tab 165, , And a pair of air pins (180) disposed on both ends of the air pin (180) on the upper plate (161a) S4 and the step of laminating a head bar 153, may comprise a step of bonding the S5 step S1 to core assembly temporarily assembled body formed in step S4 is repeated.

The lower and upper grooves 170a and 170b of the lower and upper plates 161 and 161a and the bending portion 163 and the engaging jaw 165 are processed through press working or roll forming in the step S1 can do.

Since the engaging protrusions 165 adjacent to the bending portion 163 have widths corresponding to the tube bar 190 and the pair of engaging protrusions 165 have widths corresponding to the fins 180, The assembling process of the step S3 to the step S3 is simplified and the precision of the dimension is improved, so that the defect rate can be lowered. As described above, since the lower and upper grooves are integrally formed on the plate, workability is improved.

The hooking jaw 165 and the bending portion 163 are closely coupled with the tube bar 190 in the step S5.

As described above, when the inner end of the tube bar 190 is formed of the triangular inclined surface 191, the engaging protrusion 165 is brought into surface contact with the inclined surface 191 of the tube bar 190, The inclined portion 166 is provided.

A clad layer (not shown) is formed on at least surfaces of the tube bar 190 and the lower and upper plates 161 and 161a, respectively. The layer is melted by heating at the time of brazing and the bonding is performed.

As a result, the lower and upper grooves 170a and 170b formed on the lower and upper plates are joined to each other to form a central joint, thereby being structurally robust and improving workability, and by providing a bending portion at the outer end of the lower and upper plates , The junction area of the tube bar can be widened, and the bonding strength and the pressure resistance can be improved.

In addition, since the alignment position of the pin and the tube bar is divided through the engaging jaw and the bending portion, the assembling property is improved, the dimensional stability is enhanced, and the inclined portion of the engaging jaw and the inclined surface of the tube bar are bonded, Can be improved to more reliably prevent leakage of heat medium such as oil or water.

While the present invention has been described in connection with what is presently considered to be practical exemplary embodiments, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, It is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and similarities. Accordingly, the scope of the present invention should be construed as being limited to the embodiments described, and it is intended that the scope of the present invention encompasses not only the following claims, but also equivalents thereto.

100: Heat exchanger 110: Upper tank
111: Heating medium inlet port 120: Lower tank
121: heating medium outlet 130: core assembly
133: core guard 140: first space part
150: second space part 151: air unit
152: Air pin 153: Head bar
154: head bar body 155: heat transfer part
160: heating medium unit 161, 161a: plate
170: central joints 170a, 170b: lower and upper grooves
163: Bending section 165:
166: an inclined portion 167: a pin joint
168: tube bar junction 180: pin
190: tube bar 191: incline

Claims

A method of manufacturing a core assembly for a heat exchanger having a structure in which a heating medium unit through which a heating medium flows and an air unit through which air exchanges heat with the heating medium flow are alternately stacked,
A pair of bending portions are formed by bending both ends of the lower and upper plates, and a pair of latching jaws are formed in parallel with the bending portion inward of the bending portion, And a bending portion formed at an outer side thereof and a bending portion bent at the tube bar joint portion, wherein the bending portion is provided at the outer side of the engagement portion, ;
A step S2 of laminating a tube bar on the tube bar joint portion divided by the bending portion and the engagement jaw of the lower plate, and laminating a pin on the pin joint portion defined by the pair of engagement jaws;
A step S3 of stacking the upper plate so that the tube bar stacked in the step S2 is disposed on the tube bar joint part defined by the bending part of the upper plate and the engaging jaw;
A step S4 of laminating an air pin on the upper plate and a pair of head bars disposed on both ends of the air pin;
(S5) of bonding the core assembly formed by sequentially repeating steps (S1) to (S4)
A cladding layer is formed on at least the tube bar, the lower and upper plates,
In the step S5, the core assembly is bonded to the cladding layer by a brazing method in which the cladding layer is heated and melted,
Wherein the tube bar is aligned with a seating space defined by a latching jaw, a tube bar joint and a bending portion provided on the lower plate, a latching jaw provided on the upper plate, a tube bar joint, and a bending portion,
Wherein the tube bar has a pair of inclined surfaces disposed at a triangular shape at an inner end thereof, a vertical surface at an outer end thereof, and a pair of horizontal surfaces connecting the pair of inclined surfaces to a vertical surface,

"It is done in form,
Wherein the pair of inclined surfaces are in surface contact with the inclined portions provided on the engaging jaws of the lower and upper plates, and the vertex area of the inner end where the pair of inclined surfaces meet is sandwiched between a pair of engaging jaws Wherein the pair of horizontal surfaces and vertical surfaces are in surface contact with the tube bar joint portion and the bending portion provided on the lower and upper plates, respectively,
The pin and the tube bar are stacked on the lower plate in the step S2 and the fin and the tube bar are aligned with each other only by laminating the upper plate in the step S3 so that the assembling property is improved. Assembly manufacturing method.

delete