WO2020166983A1

WO2020166983A1 - Heat exchanger

Info

Publication number: WO2020166983A1
Application number: PCT/KR2020/001993
Authority: WO
Inventors: 한지훈
Original assignee: 한온시스템 주식회사
Priority date: 2019-02-13
Filing date: 2020-02-13
Publication date: 2020-08-20

Abstract

The present invention relates to a heat exchanger. More particularly, the present invention relates to a heat exchanger, which has an inclined part formed at a side at which a first tube and a second tube of a header face each other, so as to prevent the deformation thereof due to heat stress according to flows of a first fluid and a second fluid having different temperatures, and increase the joining area and thus enhance the durability thereof.

Description

heat exchanger

The present invention relates to a heat exchanger, and in more detail, the present invention relates to a thermal stress due to the flow of the first fluid and the second fluid having different temperatures by forming an inclined portion on the side facing the first tube and the second tube of the header. It relates to a heat exchanger capable of preventing deformation due to and further increasing durability by increasing a bonding area.

In general, a heat exchanger is a device that is installed on a specific flow path so that a heat exchange medium circulating therein absorbs external heat or heat exchange by dissipating its own heat to the outside.

Such a heat exchanger is an oil that uses oil as a heat exchange medium to cool the oil flowing inside the condenser and evaporator using refrigerant as a heat exchange medium, radiator and heater core using coolant as heat exchange medium, and engine and transmission. It is manufactured in a variety of ways depending on the purpose and purpose of use such as coolers.

In recent years, as interest in the environment and energy has increased globally in the automobile industry, research to improve fuel efficiency is being conducted, and research and development for light weight, miniaturization and high functionality are continuously being conducted to satisfy the needs of various consumers. .

However, when a plurality of heat exchangers are separately manufactured and installed in a heat exchanger used in automobiles, productivity is low due to increased manufacturing man-hours, and the waste of materials is severe, increasing the cost and securing space for installing each heat exchanger. There was also difficulty in doing it. Thus, in order to solve this problem, various technologies have been developed and used to form a plurality of heat exchangers integrally.

As a related art, a heat exchanger, which is a Korean Patent Publication (10-2007-0081635), is disclosed, and FIG. 1 is a view showing a conventional heat exchanger.

As shown, in a conventional heat exchanger, a plurality of first tubes 11 through which a first fluid is circulated, a first heat dissipation fin 12 interposed between the first tubes 11 and the first tube 11 A first core portion 10 consisting of a first header 13 coupled to both ends, a plurality of second tubes 21 through which a second fluid is circulated, and a second tube 21 interposed between the second tube 21 A second core portion 20 consisting of a second heat sink 22 and a second header 23 coupled to both ends of the second tube 21, and the first and second core portions 10 arranged vertically A single tank 30 that is simultaneously coupled to the first header 12 and the second header 22 of (20) to form a space through which the first and second fluids flow, and the inside of the tank 30 At least one or more baffles 60 are provided to separate the first fluid and the second fluid. As described above, the conventional heat exchanger divides the interior of the single tank 30 into the baffle 60 so that the two heat exchange media can be cooled simultaneously.

However, in the heat exchanger at this time, since two heat exchange media with different temperatures circulate inside one tank divided by the baffle 60, the tube and the tube due to the difference in thermal expansion between the

tubes

21 and 22 and the tank 60 due to the temperature difference Deformation of the tank may occur, which may result in leakage of the heat exchange medium. In order to solve this problem, a pair of baffles 60 disposed spaced apart from each other is installed in the tank 30, and a heat shield slot 31 is formed between the pair of baffles 60 to form two baffles through the tank 30. Although the heat transfer of the branch heat exchange medium is blocked, heat transfer is still performed through the connection portion of the tank 30, so that there is still a problem in that the heat exchange medium may leak.

*Prior technical literature*

*Patent literature*

KR 10-2007-0081635 A (2007.08.17)

The present invention was conceived to solve the above-described problems, and an object of the present invention is to further increase the flexibility of the header by forming an inclined portion on the side facing the first tube and the second tube of the header. It is to provide a heat exchanger capable of preventing deformation due to thermal stress as the first fluid and the second fluid having different temperatures flow.

In addition, the object of the present invention is formed so that the first curved portion and the second curved portion positioned between the first tube and the second tube are included in the inclined portion forming region, and the first joint and the second joint of the header are coupled to the tube. It is to provide a heat exchanger that has the same depth protruding from the surface portion to increase the bonding area to further increase durability.

In addition, an object of the present invention is to provide a heat exchanger capable of stably maintaining airtightness between a header and a tank by forming a connection portion of a gasket in a shape corresponding to the first seating groove portion in which an inclined portion is formed.

In addition, it is an object of the present invention to provide a heat exchanger capable of stably heat-exchanging and increasing durability by reducing deformation of a header, as high-temperature cooling water and low-temperature cooling water having a large temperature difference between a first fluid and a second fluid.

The heat exchanger 1000 of the present invention for achieving the above object includes a plurality of first tubes 100 through which a first fluid flows and forms a first row; A plurality of second tubes 200 through which a second fluid having a temperature different from that of the first fluid flows to form a second row; A header 310 having both ends of the first tube 100 and the second tube 200 inserted and fixed, and a tank 320 having baffles 321 partitioning the first row and the second row are combined Including the header tank 301 and the second header tank 302, one or both of the headers 310 forming the first header tank 301 and the second header tank 302 are It is noted that the area bonded to the side facing the first tube 100 and the second tube 200 is formed to be wider than the area bonded to the outer sides of the first tube 100 and the second tube 200 in the width direction. It is characterized.

In addition, the header 310 is a tube coupling surface portion having a first tube insertion hole 311a into which the first tube 100 is inserted and a second tube insertion hole 311b into which the second tube 200 is inserted (311), a first seating groove (312) extending along the periphery of the tube-engaging surface portion (311) to seat the periphery of the tank (320), and a first tube insertion hole of the tube-engaging surface portion (311) A second seating groove portion 313 in which the baffle 321 is seated along between 311a and the second tube insertion hole 311b, and a tab portion extending from the first seating portion and fixing the tank 320 ( 314), wherein the second seating groove 313 includes a tube engaging surface 311 having the first tube insertion hole 311a and a tube engaging surface 311 having the second tube insertion hole 311b It is characterized in that the inclined portion 315 is obliquely connected to at least one of the formed.

In addition, the heat exchanger 1000 includes a first curved portion 110 on both sides of the first tube 100 and a second curved portion 210 on both sides of the second tube 200 in the width direction, It characterized in that the first curved portion 110 or the second curved portion 210 on the side facing the first tube 100 and the second tube 200 is positioned in the area where the inclined portion 315 is formed. .

In addition, the heat exchanger 1000 is characterized in that it satisfies the following [Equation 1].

[Equation 1]

Tw×1.04 〈2 × {H315/sinθ + (Tw/2-H315/tanθ)} <Tw×1.06

(Tw: the length in the width direction of the tube including the thickness of the tube material,

H315: Height of slope

θ: the inclination angle of the inclined portion, the acute angle formed by the tube coupling surface portion and the inclined portion)

In addition, the inclined portion 315 has a first inclined portion 315a and the second seating portion which obliquely connects the second seating groove portion 313 and the tube coupling surface portion 311 having the first tube insertion hole 311a formed thereon. It characterized in that it comprises a second inclined portion (315b) for obliquely connecting the tube coupling surface portion 311 in which the groove portion 313 and the second tube insertion hole 311b are formed.

In addition, the header 310 extends vertically along the circumference of the first tube insertion hole 311a and the second tube insertion hole 311b from the tube coupling surface portion 311 to provide the first tube 100 and The second tube insertion hole 311b is characterized in that the first joint portion 316 and the second joint portion 317 to be joined to the outer surface are formed respectively.

In addition, the first bonding portion 316 and the second bonding portion 317 are characterized in that the same depth protruding from the tube bonding surface portion 311 is formed.

In addition, the heat exchanger 1000 connects the circumferential portion 331 seated in the first seating groove 312 between the header 310 and the tank 320 and the circumferential portion 331 It characterized in that it comprises a gasket 330 including a connecting portion 332 that is seated in the 2 seating groove 313.

In addition, the gasket 330 is characterized in that the connection portion 332 has a shape having an inclined surface corresponding to the inclined portion 315 of the second seating groove 313.

In addition, the heat exchanger 1000 is formed in the first header tank 301 or the second header tank 302, a first inlet pipe 410 for introducing the first fluid into the first heat and a second outlet for discharging A pipe 520, a second inlet pipe 510 formed in the first header tank 301 or the second header tank 302 to introduce a second fluid into a second row, and a second outlet pipe 520 to discharge ) Characterized in that it includes.

In addition, the heat exchanger 1000 is characterized in that the first fluid is high-temperature cooling water, and the second fluid is low-temperature cooling water.

Accordingly, in the heat exchanger of the present invention, the inclined portion is formed on the side facing the first tube and the second tube of the header, so that the flexibility of the header can be further increased. Accordingly, the first fluid and the second fluid having different temperatures are There is an advantage of preventing deformation due to thermal stress due to flow.

In addition, the heat exchanger of the present invention is formed such that the first curved portion and the second curved portion positioned between the first tube and the second tube are included in the inclined portion forming region, and the first joint and the second joint of the header are coupled to the tube. Since the depth protruding from the surface portion is formed equal, there is an advantage of increasing the durability by increasing the bonding area.

In addition, the heat exchanger of the present invention has the advantage of stably maintaining airtightness between the header and the tank since the connection portion of the gasket is formed in a shape corresponding to the first seating groove portion in which the inclined portion is formed.

In addition, the heat exchanger of the present invention is a high-temperature cooling water and a low-temperature cooling water having a large temperature difference between the first fluid and the second fluid, and has the advantage of stably heat-exchanging and increasing durability by reducing deformation of the header.

1 is a view showing a conventional heat exchanger.

2 and 3 are perspective and exploded perspective views of a heat exchanger according to the present invention.

4 is a view showing a first header tank and a second header tank of the heat exchanger according to the present invention.

5 is a view showing a first tube and a second tube of the heat exchanger according to the present invention.

6 to 8 are perspective views showing a header of a heat exchanger according to the present invention, a cross-sectional view in the direction AA' and a cross-sectional view in the direction BB'.

9 and 10 are a perspective view showing another header of the heat exchanger according to the present invention and a cross-sectional view in the direction CC'.

*Explanation of sign*

1000: heat exchanger

100: first tube 110: first curved portion

200: second tube 210: second curved portion

301: first header tank

302: second header tank

310: header

311: tube coupling surface

311a: first tube insertion hole 311b: second tube insertion hole

312: first seating groove 313: second seating groove

314: tap portion

315: slope

315a: 1st slope 315b: 2nd slope

316: first junction 317: second junction

H1: 1st height (inclined part formation area)

H2: second height

320: tank 321: baffle

330: gasket

331: peripheral portion 332: connection portion

410: first inlet pipe 420: first outlet pipe

510: second inlet pipe 520: second outlet pipe

600: pin

Tw: Length in the width direction of the tube including the thickness of the tube material,

H315: Height of slope

θ: the inclination angle of the inclined portion, the acute angle formed by the tube coupling surface portion and the inclined portion

L1: The reference line formed by the tube bonding surface (the side where the tube of the header is inserted)

L2: Reference line formed by the inclined part (the side where the header tube is inserted)

Hereinafter, the heat exchanger 1000 of the present invention having the configuration as described above will be described in detail with reference to the accompanying drawings.

2 and 3 are perspective and exploded perspective views of a heat exchanger 1000 according to the present invention, and FIG. 4 is a first header tank 301 and a second header tank 302 of the heat exchanger 1000 according to the present invention. 5 is a view showing the first tube 100 and the second tube 200 of the heat exchanger 1000 according to the present invention, and FIGS. 6 to 8 are a heat exchanger 1000 according to the present invention. ) Is a perspective view showing the header 310, a cross-sectional view in AA' direction, and a cross-sectional view in BB' direction, and FIGS. 9 and 10 are a perspective view showing another header 310 of the heat exchanger 1000 according to the present invention and a cross-sectional view in CC' direction to be.

The heat exchanger 1000 of the present invention includes a first tube 100; The second tube 200 includes a first header tank 301 and a second header tank 302.

The first tube 100 is a portion in which a first fluid flows and forms a first row, and a plurality of the first tubes 100 are provided side by side in the longitudinal direction. A pin 600 may be interposed between the first tube 100.

In addition, the first tube 100 includes a region forming a surface at the center in the width direction, and first curved portions 110 having curved surfaces at both sides in the width direction are formed.

The second tube 200 is a portion in which a second fluid flows and is provided adjacent to the first tube 100 in a width direction that is an air flow direction to form a second row, and air is the first row and Heat exchange is performed while passing through the second row sequentially. In this case, a plurality of the second tubes 200 may be provided side by side in the longitudinal direction, and a pin 600 may be interposed between the second tubes 200. Further, the second tube 200 includes a region forming a surface at the center in the width direction, and second curved portions 210 having curved surfaces at both sides in the width direction are formed.

The first header tank 301 and the second header tank 302 are formed by combining the header 310 and the tank 320, respectively.

The header 310 is a portion in which both ends of the first tube 100 and the second tube 200 are inserted and fixed, and a first tube insertion hole 311a and a second tube insertion hole 311b are formed, Components for fixing with the tank 320 are formed. In more detail, the header 310 includes a tube coupling surface 311, a first seating groove 312, a second seating groove 313, an inclined portion 315, and a tab 314.

The tube coupling surface part 311 has a surface on which a first tube insertion hole 311a into which the first tube 100 is inserted and a second tube insertion hole 311b into which the second tube 200 is inserted are formed. It is a part that forms.

The first seating groove 312 extends along the periphery of the tube coupling surface 311 to allow air to flow so that the periphery of the tank 320 is seated (the first header tank 301 and the second header tank (302) is formed concavely.

The second seating groove 313 is concave to the side through which air flows so that the baffle 321 of the tank 320 is seated along between the first tube insertion hole 311a and the second tube insertion hole 311b. Is formed. That is, the first and

second seating grooves

312 and 313 are portions that form concave grooves so that the tank 320 is seated in the header 310.

The inclined portion 315 is a tube engaging surface portion 311 having a first tube insertion hole 311a formed from the second seating groove 313 and a tube engaging surface portion 311 having the second tube insertion hole 311b formed therein. It is an obliquely connected part with one of them. 3, 4, 6 to 8, the inclined portion 315 is a first inclined connection between the second mounting groove 313 and the tube coupling surface portion 311 in which the first tube insertion hole 311a is formed. An example including an inclined portion 315a and a second inclined portion 315b obliquely connecting the tube coupling surface portion 311 having the second seating groove portion 313 and the second tube insertion hole 311b formed thereon was shown, 9 and 10 illustrate an example in which an inclined portion 315 for obliquely connecting the tube coupling surface portion 311 in which the second seating groove 313 and the first tube insertion hole 311a are formed is formed. In the heat exchanger 1000 of the present invention, in addition to the shape shown in the drawing, the inclined portion 315 tilts the tube coupling surface portion 311 in which the second seating groove 313 and the second tube insertion hole 311b are formed. It may include a form of connection.

At this time, in the region where the inclined portion 315 is formed, the first curved portion 110 or the second curved portion 210 on the side facing the first tube 100 and the second tube 200 It is preferred to be located. That is, the inclined portion 315 formed toward the first tube 100 is in the width direction of the first tube inside the inclined portion 315 forming region that connects the tube engaging surface portion 311 and the second seating groove 313 The first curved portion 110 (the first curved portion 110 located on the right in FIG. 5) on the side 100 and the second tube 200 faces is positioned.

In addition, the inclined portion 315 formed toward the second tube 200 is disposed inside the inclined portion 315 forming region connecting the tube coupling surface portion 311 and the second seating groove 313 in the width direction. The second curved portion 210 (the second curved portion 210 located on the left in FIG. 6) on the side facing the 100 and the second tube 200 is positioned.

Through this, in the heat exchanger 1000 of the present invention, the first tube 100 and the second tube 100 and the second tube 200 have an area bonded to the header 310 on the side facing each other. It is formed to be wider than the area bonded to both outer sides of the tube 200, there is an advantage of preventing damage to the header 310 by increasing the flexibility of the header 310.

At this time, the heat exchanger 1000 of the present invention satisfies the following [Equation 1] to obtain improved durability, which is an advantage of the formation of the inclined portion 315, as well as higher manufacturability.

[Equation 1]

Tw×1.04 〈2 × {H315/sinθ + (Tw/2-H315/tanθ)} <Tw×1.06

H315: Height of slope

θ: The inclination angle of the inclined part, the example of forming the tube coupling surface part and the inclined part*

At this time, θ represents the inclination angle of the inclined portion 315 and is shown in FIGS. 7 and 8. In this case, the inclination angle θ of the inclined portion is inclined with the tube coupling surface 311 based on the upper side of FIGS. 7 and 8, which are the sides into which the tubes (first tube 100, second tube 200) are inserted. It is defined as an acute angle formed by the portion 315. At this time, when the tube coupling surface portion 311 and the inclined portion 315 are not in direct contact, as shown in FIG. 7, the inclination angle θ of the inclined portion is a reference line L1 formed by the tube coupling surface portion 311 And an acute angle at which the two reference lines L1 and L2 contact when the reference line L2 formed by the inclined portion 315 is extended. In addition, Tw means the length in the width direction of the tube and is the same as the inner diameter of the tube insertion hole.

Further, in the heat exchanger 1000 of the present invention, when the inclined portion 315 includes the first inclined portion 315a and the second inclined portion 315b, the first inclined portion 315a and the second inclined portion ( 315b) It is preferable to satisfy Equation 1 above, respectively.

In addition, the heat exchanger 1000 according to the present invention includes the first connection part 316 so as to further increase the area joined to the header 310 on the side facing the first tube 100 and the second tube 200. And the second bonding portion 317 is preferably formed to have the same depth protruding from the tube bonding surface portion 311. The first joint portion 316 is a portion extending vertically along the periphery of the first tube insertion hole 311a to be joined to the outer surface of the first tube 100, and the second joint portion 317 is a portion for inserting the second tube. It is a portion extending vertically along the periphery of the hole 311b and joined to the outer surface of the second tube 200. In the present invention, the meaning of “the first bonding portion 316 and the second bonding portion 317 has the same depth protruding from the tube bonding surface 311” means the first bonding portion 316 and It means that the end of the second joint portion 317 forms a surface parallel to the tube coupling surface portion 311, and as the inclined portion 315 is formed, the first joint portion 316 in which the inclined portion 315 is formed. The first height H1 of) is longer than the second height H2 of the first junction 316 in the region where the inclined portion 315 is not formed. In addition, the height of the second junction 317 in which the inclined portion 315 is formed is longer than the height of the second junction 317 in the region where the inclined portion 315 is not formed. Accordingly, when the heat exchanger 1000 of the present invention increases the bonding area in the region between the first tube 100 and the second tube 200, the temperature difference between the first fluid and the second fluid is large, so that a large thermal stress acts. In addition, there is an advantage of increasing the durability.

In addition, the heat exchanger 1000 of the present invention may further include a gasket 330 between the header 310 and the tank 320.

The gasket 330 includes a circumferential portion 331 seated in the first seating groove 312 and a connection portion 332 that connects the periphery portion 331 and seated in the second seating groove 313 do. The gasket 330 is made of an elastic material and is provided between the header 310 and the tank 320 to increase airtightness.

In this case, the gasket 330 may have a shape having a circular cross section, and when the inclined portion 315 is formed in the second seating groove 313, it may be formed to correspond to the shape. In more detail, when the inclined portion 315 is formed with the first inclined portion 315a and the second inclined portion 315b toward the first tube 100 and the second tube 200, the connection portion 332 ) May have a shape having an inclined surface corresponding to the first inclined portion 315a and the second inclined portion 315b, and in more detail, may have a trapezoidal shape. The cross-section of the connecting portion 332 of the gasket 330 shown in FIG. 4 shows an example in which the long side of the trapezoid is positioned on the upper side as the inclined portion 315 is formed from the center to the upper side of both sides, and the inclined portion 315 When) is formed from the center to the bottom of both sides, the connection part 332 has a shape that is vertically symmetric with the shape shown in FIG. 4.

In the heat exchanger 1000, the first fluid may be a high-temperature cooling water, the second fluid may be a low-temperature cooling water, and the high-temperature cooling water may be cooled by heat exchange with air first. At this time, a first inlet pipe 410 for introducing the first fluid is formed in the first header tank 301 or the second header tank 302, and a first outlet pipe for discharging the first fluid ( A 420 is formed in the first header tank 301 or the second header tank 302. In addition, a second inlet pipe 510 for introducing the second fluid is formed in the first header tank 301 or the second header tank 302, and a second outlet pipe 520 for discharging the second fluid. ) Is formed in the first header tank 301 or the second header tank 302. The formation positions of the first inlet pipe 410, the first outlet pipe 420, the second inlet pipe 510, and the second outlet pipe 520 may be formed in a variety of ways in addition to the shape shown in FIG. have.

Accordingly, the heat exchanger 1000 of the present invention is a high-temperature cooling water and a low-temperature cooling water having a large temperature difference between the first fluid and the second fluid, and can stably heat exchange and increase the durability by reducing the deformation of the header 310. There is an advantage.

The present invention is not limited to the above-described embodiments, and the scope of application thereof is diverse, as well as anyone with ordinary knowledge in the field to which the present invention belongs without departing from the gist of the present invention claimed in the claims. Of course, various modifications are possible.

Claims

A plurality of first tubes through which the first fluid flows and forming a first row;

A plurality of second tubes through which a second fluid having a temperature different from that of the first fluid flows to form a second row;

A first header tank and a second header tank to which a header into which both ends of the first tube and the second tube are inserted and fixed, and a tank having a baffle partitioning the first row and the second row are combined,

One or both of forming the first header tank and the second header tank have an area joined to the side facing the first tube and the second tube in the width direction of the first tube and the second tube in the width direction. Heat exchanger, characterized in that it is formed to be wider than the area joined to both sides of the outside.
The method of claim 1,

The header includes a tube-engaging surface portion having a first tube insertion hole into which the first tube is inserted and a second tube insertion hole into which the second tube is inserted, and extending along the circumference of the tube-engaging surface portion so that the circumference of the tank is A first seating groove to be seated, a second seating groove in which the baffle is seated along between the first tube insertion hole and the second tube insertion hole of the tube coupling surface, and extending from the first seating portion to fix the tank Heat exchanger, characterized in that it comprises a tap portion.
The method of claim 2,

The second seating groove portion is a heat exchanger, characterized in that the inclined portion is formed to be obliquely connected to at least one of the tube engaging surface portion in which the first tube insertion hole is formed and the tube engaging surface portion in which the second tube insertion hole is formed.
The method of claim 3,

The heat exchanger,

It includes a first curved portion on both sides of the first tube and a second curved portion on both sides of the second tube in the width direction,

A heat exchanger, characterized in that a first curved portion or a second curved portion on a side facing the first tube and the second tube is positioned in the inclined portion forming region.
The method of claim 3,

The heat exchanger, characterized in that it satisfies the following [Equation 1].

[Equation 1]

Tw×1.04 〈2 × {H315/sinθ + (Tw/2-H315/tanθ)} <Tw×1.06

(Tw: the length in the width direction of the tube including the thickness of the tube material,

H315: Height of slope

θ: the inclination angle of the inclined portion, the acute angle formed by the tube coupling surface portion and the inclined portion)
The method of claim 3,

The inclined portion is a first inclined portion for obliquely connecting the tube coupling surface portion having the second seating groove portion and the first tube insertion hole formed thereon, and a second inclined portion connecting the tube coupling surface portion having the second seating groove portion and the second tube insertion hole. Heat exchanger comprising a slope.
The method of claim 4,

The header extends vertically along the circumference of the first tube insertion hole and the second tube insertion hole from the tube coupling surface portion to be joined to the outer surfaces of the first tube and the second tube insertion hole. Heat exchanger, characterized in that each formed.
The method of claim 7,

The heat exchanger, characterized in that the first joint and the second joint have the same depth protruding from the tube coupling surface.
The method of claim 4,

The heat exchanger comprises a gasket including a circumference portion seated in the first seating groove portion between the header and the tank, and a connection portion seating in the second seating groove portion by connecting the peripheral portion.
The method of claim 9,

The gasket is a heat exchanger, characterized in that the connecting portion has an inclined surface corresponding to the inclined portion of the second seating groove.
The method of claim 1,

The heat exchanger is formed in the first header tank or the second header tank, the first inlet pipe for introducing the first fluid into the first row and the second outlet pipe for discharging, and the first header tank or the second header tank And a second inlet pipe for introducing a second fluid into the second heat and a second outlet pipe for discharging.
The method of claim 11,

In the heat exchanger, the first fluid is a high-temperature cooling water, and the second fluid is a low-temperature cooling water.