KR20130079778A

KR20130079778A - Heat exchanger

Info

Publication number: KR20130079778A
Application number: KR1020120000479A
Authority: KR
Inventors: 한지훈; 전길웅; 정순안; 한정완; 이종두
Original assignee: 한라비스테온공조 주식회사
Priority date: 2012-01-03
Filing date: 2012-01-03
Publication date: 2013-07-11

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat exchanger, and more particularly, to a heat exchanger including a pair of header tanks spaced apart from each other by a predetermined distance. A plurality of refrigerant tubes having a plurality of dimples formed at both ends of the pair of header tanks to form a heat exchange medium flow path, and having a plurality of dimples inwardly; A plurality of fins fixed to abut between the refrigerant tubes; In the heat exchanger comprising: the outer surface of the refrigerant tube to flatten the outer surface of the refrigerant tube to prevent a decrease in heat exchange performance due to the reduction in the contact area with the fin due to the dimple formed in the refrigerant tube and the refrigerant tube and It relates to a heat exchanger that can maximize the heat dissipation performance by the complete contact and coupling of the fins.

Description

Heat exchanger

A heat exchanger is a device that absorbs heat from one side and releases heat to the other between two environments with a difference in temperature. In this case it will act as a heating system.

In a vehicle equipped with an internal combustion engine, a water-cooled heat exchanger is usually installed in a vehicle for cooling the engine. The water-cooled heat exchanger lowers the temperature of the cooling water circulating through the cylinder block and the cylinder head by the water pump, and includes a radiator, a cooling fan, and a water temperature controller for radiating the cooling water.

At this time, the radiator is a pair of header tanks (10, 20) formed side by side spaced apart as shown in Figure 1; A plurality of refrigerant tubes 30 fixed at both ends of the pair of header tanks 10 and 20 to form a heat exchange medium flow path; And a plurality of fins 40 fixed in contact between the refrigerant tubes 30. It is made, including. In addition, the fins 40 are formed in a corrugated form between the refrigerant tubes 30, assembled between the refrigerant tubes 30, and then joined and joined by brazing, and air passing between the refrigerant tubes 30. Increase the contact area with the. Thus, the heat exchange efficiency between the heat exchange medium and ambient air flowing along the inside of the refrigerant tube 30 is increased.

In addition, the refrigerant tube 30 has a plurality of dimples 31 are formed so as to ohm width inward, as shown in Figure 2 to cause the turbulent flow of the heat exchange medium flowing along the refrigerant tube 30 to improve heat exchange performance It is composed.

By the way, the dimple 31 formed in the refrigerant tube 30 is formed in a form that the ohmic width from the outside to the inside by pressing the refrigerant tube 30. When the fin 40 is coupled to the refrigerant tube 30 through brazing, the fin 40 is not coupled to the portion where the dimple 31 is formed, and thus the contact area between the refrigerant tube 30 and the fin 40 is reduced to transfer heat. There is a problem that performance is reduced. As a conventional technology in which a dimple is formed in the refrigerant tube, a cooling tube for a heat exchanger and a heat exchanger using the same are disclosed in Korean Patent Registration (10-0864843).

KR 10-0864843 B1 (2008.10.23.)

The present invention has been made to solve the above problems, an object of the present invention is the heat exchange performance is reduced by the contact area of the refrigerant tube and the fin due to the dimple is formed so as to ohm width from the outside to the inside of the refrigerant tube In order to prevent this from being lowered, one sheet of clad plate formed with dimples on one side is rolled twice to form a refrigerant tube through brazing so that dimples are not formed on the outside, or an inner tube with dimples formed inside the outer tube. By inserting and then bonding through brazing so that dimples are not formed on the outside, the refrigerant tube and the fins are completely contacted and coupled to provide a heat exchanger capable of maximizing heat dissipation performance.

Heat exchanger of the present invention for achieving the object as described above, a pair of header tank 100 is formed side by side spaced apart a certain distance; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. In the heat exchanger comprising a, the refrigerant tube 200 is made of a clad plate 210 is formed with a plurality of dimples 213 so that the cladding layer 212 is formed on one surface and protrudes on one side, The clad plate 210 is bent to form a two-ply tubular shape, wherein the dimples 213 are disposed inward and the two plies are in contact with each other by the cladding layer 212.

In addition, the clad plate 210 is bent portion 214 is formed in the center and bent to form a two-ply tubular, both ends of the clad plate 210 is in close contact with the bent portion 214 and each inner peripheral surface and It is characterized in that it is formed to match the outer peripheral surface.

And the heat exchanger of the present invention, a pair of header tank 100 is formed side by side spaced apart a certain distance; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. In the heat exchanger comprising a, the refrigerant tube 200 comprises a first tube (200a) protruding to form a plurality of dimples (213) inward; And a second tube 200b inserted into and coupled to the outside of the first tube 200a. It is made, including, the outer circumferential surface of the first tube (200a) or the inner circumferential surface of the second tube (200b) is characterized in that the cladding layer 212 is formed and bonded.

In addition, the first tube 200a is formed in a tubular shape so that the dimples 213 are disposed inward by bending the first plate member 210a having a plurality of dimples 213 protruding from one surface thereof. 200b) is formed in a tubular shape by bending the second plate member 210b, and an outer circumferential surface of the first tube 200a or an inner circumferential surface of the second tube 200b has a cladding layer 212 formed thereon, and is bonded thereto. .

In addition, the groove 215 formed concave by the dimple 213 is characterized in that the cladding layer 212 is melted and filled when bonding through brazing.

In the heat exchanger of the present invention, the outer surface of the coolant tube is formed to be flat while a dimple is formed inward so that the coolant tube and the fin can be completely contacted and coupled, thereby improving heat exchange performance.

In addition, the coolant tube is made of a clad plate material having a clad layer formed on one surface thereof, so that the concave portion of the dimple formed in the coolant tube is filled during brazing, thereby improving heat exchange performance.

1 is a schematic view showing a conventional heat exchanger.
2 is a cross-sectional view showing a refrigerant tube and a dimple of a conventional heat exchanger.
3 is a perspective view and a partial cross-sectional enlarged view showing a heat exchanger of the present invention.
4 to 6 are a perspective view and a cross-sectional view showing a clad plate and a refrigerant tube according to the present invention.
7 to 9 are exploded perspective views, cross-sectional views and perspective views showing another embodiment of the refrigerant tube according to the present invention.
10 is a partial cross-sectional view showing a dimple of a refrigerant tube according to the present invention.
11 is a partial perspective view showing a bonding state of the refrigerant tube and the fin according to the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The above and other objects, features and advantages of the present invention will be more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

3 is a perspective view and a partial cross-sectional enlarged view of the heat exchanger of the present invention.

As shown, the heat exchanger 1000 of the present invention includes a pair of header tanks 100 which are formed side by side at a predetermined distance from each other; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. It is made, including. In addition, the refrigerant tube 200 is formed of a cladding plate 210 having a plurality of dimples 213 formed so that a cladding layer 212 is formed on one surface and protrudes on one side of the other surface, and the clad plate 210 is formed. It is bent to form a two-ply tubular shape, the dimples 213 are disposed inside and the two surfaces are in contact with each other by the cladding layer 212 is formed.

First, the header tank 100 has a space in which a heat exchange medium is stored and flows, and is spaced a certain distance to form a pair. The header tank 100 is formed with an inlet pipe 110 through which the heat exchange medium flows and an outlet pipe 120 through which the heat exchange medium is discharged.

In addition, both ends of the refrigerant tube 200 are fixed to the pair of header tanks 100, and the refrigerant tubes 200 communicate with the header tanks 100 to form a flow path of the heat exchange medium.

In addition, the fin 300 is interposed between the coolant tubes 200 and fixed to the coolant tube 200 in contact with the coolant tube 200 to receive heat from a heat exchange medium flowing into the coolant tube 200. Release to the outside. At this time, the fin 300 is bent in a pleated form or zigzag form is formed to widen the heat dissipation area.

Hereinafter, the refrigerant tube 200 will be described in more detail.

The coolant tube 200 is formed of a clad plate 210 having a plurality of dimples 213 formed so that the cladding layer 212 is formed on one surface and protrudes on one side as shown in FIG. 4. Here, the clad plate 210 is formed by joining the metal layer 211 and the clad layer 212 by rolling or the like to form a sheet, and the metal layer 211 is generally formed of an aluminum material and the clad layer ( 212) is formed of an alloy in which elements such as magnesium, silicon, iron, copper, manganese, and titanium are added to aluminum, and have a lower melting point than aluminum, which is a material of the metal layer 211, so that the metal can be melted and joined by brazing. do.

In addition, the clad plate 210 is bent (bending) to form a tubular shape twice as shown in FIG. That is, it is made in the form of a tube and consists of a double tube form. In this case, the convex portions of the dimples 213 are bent to be disposed inward, and the dimples 213 are configured on the inner circumferential surface of the refrigerant tube 200, and the outer circumferential surface is formed in a smooth and flat tubular shape without concave portions.

After the clad plate 210 is bent and manufactured in the form of a double tube as described above, a surface in which two layers contact each other by brazing may be joined by the clad layer 212 to manufacture the coolant tube 200.

Thus, the coolant tube 200 has the dimples 213 formed on an inner circumferential surface thereof to generate turbulent flow of a heat exchange medium flowing inside the coolant tube 200, and at the same time the outer circumferential surface of the coolant tube 200 Since it is smooth and flat, the contact area coupled with the fin 300 can be maximized, thereby improving heat exchange performance.

At this time, the clad plate 210 is formed in a bent portion 214 is bent in the center and bent in two layers as shown in Figure 6, both ends of the clad plate 210 is in close contact with the bent portion 214 And may be formed to coincide with the inner circumferential surface and the outer circumferential surface, respectively. That is, the bent portion 214 formed at the center portion of the clad plate 210 is bent once and then bent again to the opposite form so that both sides of the bent portion 214 are stepped, and the bent clad plate 210 is bent. Both ends of the may be formed to be in close contact with the bent portion 214 when the brazing.

Thus, when the clad plate 210 is rolled up in two layers and then bonded by brazing, the coolant tube 200 may be manufactured with a smooth refrigerant tube 200 without a jaw on the inner and outer circumferential surfaces thereof. Simplification has the advantage of easy coupling of the refrigerant tube 200 and the header tank 100.

And another embodiment of the heat exchanger 1000 of the present invention, a pair of header tank 100 is formed side by side spaced apart a certain distance; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. In the heat exchanger comprising a, the refrigerant tube 200 comprises a first tube (200a) protruding to form a plurality of dimples (213) inward; And a second tube 200b inserted into and coupled to the outside of the first tube 200a. It is made, including, the outer circumferential surface of the first tube (200a) or the inner circumferential surface of the second tube (200b) may be configured such that the clad layer 212 is formed and bonded.

In the former embodiment, the configuration of the refrigerant tube 200 is changed, and in the former embodiment, one refrigerant tube 200 is formed by rolling two layers using a single clad plate 210. In the latter embodiment, the refrigerant tube 200 is made of a first tube 200a and a second tube 200b separately, so that the second tube 200b is disposed outside the first tube 200a. It is inserted and joined.

7 and 8, the first tube 200a is formed with a dimple 213 to protrude to an inner circumferential surface, and the second tube 200b is formed in a smooth tubular shape. The first tube 200a is inserted into the second tube 200b so that the two tubes are coupled to each other. At this time, the outer circumferential surface of the first tube (200a) or the inner circumferential surface of the second tube (200b) is a clad layer 212 is formed and bonded through brazing. That is, the cladding layer 212 is formed on the outer circumferential surface of the first tube 200a or the cladding layer 212 is formed on the inner circumferential surface of the second tube 200b, thereby forming the first tube 200a on the second surface. After inserting the inside of the tube 200b and brazing, it may be formed as one refrigerant tube 200.

As described above, since two tubes may be manufactured and combined to form one refrigerant tube 200, there is an advantage in that it is easy to manufacture compared to the former embodiment.

9, the first tube 200a bends the first plate member 210a having a plurality of dimples 213 protruding from one surface thereof, and the joints at which both ends of the first plate member 210a abut the ultrasonic welding. Thus, the dimples 213 may be formed in a tubular shape so as to be disposed inside, and the second tube 200b may be formed in a tubular shape by bending the second plate 210b and ultrasonically welding the joint. That is, the first tube 200a is formed by pressing the first plate member 210a so that the dimples 213 protrude to one surface and bent to form a tubular shape, and the second tube 200b is the second tube 200b. The tube 200b is formed in a tubular shape by bending the second plate 210b. In this case, any one of the first plate member 210a or the second plate member 210b may be a clad plate member having a clad layer 212 formed on one surface thereof, and the first tube 200a and the second tube 200b may be used. The cladding layer 212 may be manufactured to be positioned on a surface in contact with each other, and may be bonded to each other by brazing to be manufactured as a single refrigerant tube 200.

In addition, the groove 215 formed concave by the dimple 213 may be filled with the cladding layer 212 when the bonding is performed through brazing. That is, as shown in FIG. 10, the groove 215 formed by forming the dimples 213 through the press working flows while the cladding layer 212 melts during brazing to fill the grooves 215. Thus, as shown in FIG. 11, the refrigerant tube 200 and the fin 300 may be completely in contact with each other.

Therefore, the heat transfer loss caused by the groove 215 can be reduced, so that the heat transfer performance of the heat exchange medium flowing inside the refrigerant tube 200 and the refrigerant tube 200 and the fin 300 is further improved. There is this.

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.

1000: Heat exchanger (of the present invention)
100: Header tank
110: inlet pipe 120: outlet pipe
200: Refrigerant tube
210: clad plate
211: metal layer 212: cladding layer
213: dimple 214: bend
215: home
200a: first tube 200b: second tube
210a: first plate 210b: second plate
300: pin

Claims

A pair of header tanks 100 formed side by side at a predetermined distance; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. In the heat exchanger comprising a,
The coolant tube 200 is formed of a cladding plate 210 having a plurality of dimples 213 formed so that the cladding layer 212 is formed on one surface and protrudes on one side of the other surface, and the clad plate 210 is bent. Heat exchanger, characterized in that formed in a two-layer tubular shape, the dimples (213) are disposed inside and the two surfaces are in contact with each other by the cladding layer (212).

The method of claim 1,
The clad plate 210 is formed in the center and the bent portion 214 is bent and formed in two layers of tubular, both ends of the clad plate 210 is in close contact with the bent portion 214 on the inner peripheral surface and the outer peripheral surface, respectively Heat exchanger, characterized in that formed to match.

A pair of header tanks 100 formed side by side at a predetermined distance; A plurality of refrigerant tubes 200 having both ends fixed to the pair of header tanks 100 to form a flow path of a heat exchange medium; And a plurality of fins 300 fixed in contact between the refrigerant tubes 200. In the heat exchanger comprising a,
The refrigerant tube 200 may include a first tube 200a having a plurality of dimples 213 protruding from the inside thereof; And a second tube 200b inserted into and coupled to the outside of the first tube 200a. It is made, including, the outer circumferential surface of the first tube (200a) or the inner circumferential surface of the second tube (200b) is a heat exchanger, characterized in that the cladding layer (212) is formed and bonded.

The method of claim 3,
The first tube 200a is formed in a tubular shape such that the dimples 213 are disposed inward by bending the first plate member 210a having a plurality of dimples 213 protruding from one surface thereof, and the second tube 200b. The second plate member 210b is formed in a tubular shape, and an outer circumferential surface of the first tube 200a or an inner circumferential surface of the second tube 200b has a cladding layer 212 formed thereon, which is joined. .

5. The method according to any one of claims 1 to 4,
The groove (215) formed concave by the dimple (213) is characterized in that the cladding layer (212) is melted and filled when bonding through brazing.