KR20210028884A - Header structure of heat exchanger - Google Patents

Abstract

The present invention relates to a heat exchanger comprising: a plurality of tubes in which a heat exchange medium flows inside, and is spaced apart from each other in both directions; a header including a plurality of tube insertion holes into which one end of the plurality of tubes is respectively inserted; and a plurality of stoppers disposed on at least two or more of the plurality of tube insertion holes to limit the insertion depth of the tube. Some of the plurality of stoppers are formed to have different lengths, so that distribution of the flowing heat exchange medium can be made more efficiently, but an accident in which the fluid leaks can be prevented in advance.

Description

Header structure of heat exchanger {HEADER STRUCTURE OF HEAT EXCHANGER}

The present invention relates to a header structure of a heat exchanger, and more particularly, to a structure of a header coupled to a plurality of tubes in a header tank for distributing an introduced heat exchange medium to a plurality of tubes.

In general, a heat exchanger is a device installed on a specific flow path so that a heat exchange medium circulating inside performs heat exchange in a manner that absorbs heat from the outside or radiates heat to the outside. These heat exchangers are condensers and evaporators that use refrigerant as heat exchange media, radiators and heater cores that use cooling water as heat exchange media, and oil coolers that use oil used in engines and transmissions as heat exchange media. It is produced in various ways.

In this case, the heat exchanger is generally formed in a form in which header tanks are coupled to both ends of a plurality of tubes in which heat transfer between the internal fluid and the external fluid is formed. In addition, the heat exchange medium, which is an internal fluid, flows into the header tank and is distributed over a plurality of tubes, and the fluid circulated in the tube may be collected and discharged into the header tank.

Here, the tube may be coupled by brazing a region in contact with the tube insertion groove formed in the header of the header tank while being inserted into the tube insertion groove. In addition, as the combined tube and header are used, there is a problem that the heat exchange medium may leak from the combined surface. Accordingly, Korean Patent Laid-Open Publication No. 10-2019-0073742 ("Integrated Heat Exchanger", published on June 27, 2019), which detects leaks that occur when a plurality of heat exchange media are used, or a heat exchange medium flowing along a header tank. Korean Patent Publication No. 10-1932205 ("heat exchanger", 2018.12.26.announcement), which prevents breakage by reducing the water passing resistance of, is currently disclosed.

Accompanying this, when the header tank is adjacent to the inlet side through which the heat exchange medium flows in or the flow path circulating through the baffle, uniform flow rate distribution must be performed in order to increase the efficiency due to the characteristics of the heat exchanger. For this, although Japanese Patent Laid-Open Publication No. 2008-057952 ("Heat Exchanger", published on March 13, 2008) discloses a technology for controlling the flow rate in the header tank by manufacturing and combining a separate product, in the case of applying a separate product There is a problem in that not only weight and cost increase, but also an additional assembly process is added.

KR 10-2019-0073742 A ("Integrated heat exchanger") 2019.06.27. open KR 10-1932205 B1 ("heat exchanger") 2018.12.26. Announcement JP 2008-057952 A ("Heat Exchanger") 2008.03.13. open

The present invention has been conceived to solve the above-described problems, and an object of the present invention is to provide a flow rate control of a fluid in a header tank through stoppers of different lengths formed on the tube inlet of the header.

In addition, an object of the present invention is to simplify the process while reducing weight and cost by omitting the process of producing or installing separate items since the stoppers of different lengths are integrally formed with the tube insertion port of the header.

In addition, it is an object of the present invention to prevent leakage of a heat exchange medium by increasing an area to be joined through stoppers, and to provide a plurality of tubes to be joined at a predetermined depth.

The heat exchanger of the present invention for achieving the above object includes a pair of tanks having an inlet and an outlet through which a heat exchange medium flows; A plurality of tubes in which the heat exchange medium is flowed and spaced apart from each other in both directions; A pair of headers including a plurality of tube insertion ports into which the plurality of tubes are respectively inserted on one side, and to which the tank is coupled to the other side; And a plurality of stoppers disposed at at least two of the plurality of tube insertion ports to limit the insertion depth of the tube, wherein some of the plurality of stoppers have different lengths and are distributed to adjacent tubes. The flow rate can be adjusted.

In addition, the plurality of stoppers include at least one or more first stoppers and second stoppers having different lengths, and the first stopper is formed to have a length longer than that of the second stopper, and the first stopper is formed of the second stopper. It may be arranged to be adjacent to the inlet of the tank than the 2 stopper.

In addition, in the present invention, among the plurality of stoppers, the stopper having the longest length may be disposed at the tube insertion port closest to the inlet of the tank.

In addition, in the present invention, the tube insertion port of the header and the stopper may be integrally formed with each other.

In addition, in the present invention, the tube is disposed on one surface of the header, and the header further includes a protrusion protruding from the tube insertion port in a direction of the other surface but having a hollow part, and a stopper may be disposed on the hollow of the protrusion. .

In addition, the tube may have an outer surface of one end in contact with the inner surface of the tube insertion port, and a surface of one end of the tube in contact with the stopper.

In addition, the stopper may be disposed on the side of the hollow end of the protrusion, so that the outer surface of one end side of the tube is in contact with the inner surface of the tube insertion port and the hollow inner surface of the protrusion, respectively.

In addition, the tube may be coupled to the tube insertion port of the header and the stopper by brazing.

In addition, the tube may have a partition wall formed on the inner hollow portion, and the stopper may be disposed to contact the partition wall of the tube.

In addition, some of the plurality of stoppers may have a length equal to or longer than the length of the partition wall of the tube.

In addition, the tube may be formed of a folded tube having a gap formed outside the partition wall by bending the plate material at both sides, and the stopper may be formed to be longer than the gap of the tube.

In addition, the headers may be formed in a pair, each coupled to both ends of a plurality of the tubes, and a plurality of stoppers may be formed on each of the pair of headers.

In the heat exchanger of the present invention according to the above-described configuration, a plurality of stoppers having different lengths are disposed at each of the plurality of tube insertion ports, so that the flowing heat exchange medium is uniformly distributed over the plurality of tubes. Accordingly, since the fluid heat-exchanged by the heat exchanger of the present invention is discharged at a more uniform temperature, there is an advantage in that the device can be driven more efficiently.

In addition, the heat exchanger of the present invention may be provided so as to reduce the flow resistance due to the deeply inserted tube by limiting the insertion depth such that the plurality of stoppers have a uniform depth at which the plurality of tubes are inserted. At this time, the plurality of stoppers are formed integrally with the header to reduce the weight and cost of the heat exchanger produced, and there is an advantage that production can be performed without an additional process by adjusting the perforated area in the process of forming the tube insertion port.

In addition, in the heat exchanger of the present invention, the contact area between the tube and the header is increased, so that the sealing performance is more improved during bonding using brazing or the like, and there is an effect of preventing leakage of the heat exchange medium even when used for a long time.

1 is a perspective view of a heat exchanger according to an embodiment of the present invention.
2 is an exploded perspective view of a heat exchanger according to an embodiment of the present invention.
3 is a perspective view of a header according to an embodiment of the present invention.
Figure 4 is a partially enlarged view of Figure 3 according to an embodiment of the present invention.
Figure 5 is an enlarged view of the main part of Figure 2 according to an embodiment of the present invention.
6 is a side view of a header according to an embodiment of the present invention.
7 is a front cross-sectional view of a header according to an embodiment of the present invention.
8 is a front cross-sectional view showing that a tube and a header are coupled according to an embodiment of the present invention.
9 is a partially enlarged view of FIG. 8 according to an embodiment of the present invention.
10 is a front cross-sectional view of a header according to another embodiment of the present invention.
11 is a perspective view of a tube according to another embodiment of the present invention.
12 is a cross-sectional view of a tube according to another embodiment of the present invention.
13 is a plan cross-sectional view showing that a tube and a header are coupled according to another embodiment of the present invention.

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

<First Example>

1 and 2 are related to an embodiment of a heat exchanger according to the present invention, FIG. 1 is a perspective view of the heat exchanger, and FIG. 2 is an exploded perspective view of the heat exchanger, respectively.

1 and 2, the heat exchanger of the present invention includes a core part 10 through which heat exchange is performed between a heat exchange medium and a fluid, and a header tank 20 having an inlet and an outlet through which the heat exchange medium is introduced and discharged. I can. At this time, the core part 10 may include a plurality of tubes 100 made of a material capable of exchanging heat while a heat exchange medium flows therein, and a fin 11 is interposed between the plurality of tubes 100 Or it may further include a variety of configurations such as the inner pin is inserted into the inside of the tube (100). And the header tank 20 is made of a pair, but the pair of header tanks 20 may include a header 200 and a tank 300, respectively.

Here, the pair of headers 200 may be spaced apart from each other in the width direction, and may be coupled to both ends of the tube 100 of the core part 10. In addition, the pair of tanks 300 may be respectively coupled to the outer side in the width direction of the pair of headers 200 to form a sealed space therein, and a heat exchange medium flows into the tank 300 (F _in ) And an outlet through which the heat exchange medium is discharged (F _out ). In addition, a configuration such as a baffle may be further included in the inner space of the header tank 20, and a heat exchange medium may flow in a zigzag form along the height and width directions through the baffle. In this case, the height, width, and length directions are arbitrarily set directions to more clearly describe the present invention, and in the present invention, the heat exchanger to be described later is not limited to being disposed in the above direction.

3 to 6 are related to an embodiment of a heat exchanger according to the present invention, FIG. 3 is a perspective view of a header, FIG. 4 is a partial enlarged view of FIG. 3, FIG. 5 is an enlarged main part of FIG. 2, and FIG. 6 Represents a side view of the header, respectively.

First, referring to FIGS. 3 and 4, the header 200 may be provided with a plurality of tube insertion ports 210 so that the plurality of tubes 100 may be respectively inserted. In addition, the present invention may include a plurality of stoppers 400 formed on the plurality of tube insertion holes 210. Here, the present invention may be characterized in that the plurality of stoppers 400 include a first stopper 410 and a second stopper 420 formed with different lengths. That is, among the plurality of stoppers 400, at least one unit stoppers formed in one length are collectively referred to as a first stopper 410, and at least one unit stoppers formed in another length are collectively referred to as a second. It can be divided into a stopper (420).

Next, referring to FIGS. 5 and 6, a plurality of stoppers 400 are disposed on a tube insertion port 210 into which a plurality of tubes 100 are inserted, respectively, to limit the insertion depth of the tube 100 The tube 100 may be inserted by a certain depth. In addition, the plurality of stoppers 400 may control the heat exchange medium distributed to the plurality of tubes 100 by adjusting the length of each stopper.

For example, when the first stopper 410 is closer to the inlet side through which the heat exchange medium flows than the second stopper 420, the length of the first stopper 410 may be longer than the length of the second stopper 420. Can be formed. In this case, the inlet side may be configured based on the side discharged from the previous tube 100 in the flow path when the fluid is introduced into the header tank and is circulated by the baffle. Accordingly, the heat exchange medium introduced through the inlet side may be evenly distributed to both the adjacent tube 100 and the relatively spaced tube 100. In addition, the present invention has the advantage that the heat transfer between the heat exchange medium flowing in the tube and the fluid flowing outside the tube is configured to be uniform throughout the core.

7 to 9 are related to an embodiment of a heat exchanger according to the present invention, FIG. 7 is a front cross-sectional view of a header, FIG. 8 is a front cross-sectional view showing a tube and a header are coupled, and FIG. 9 is a part of FIG. Each of the enlarged views is shown.

First, referring to FIG. 7-(a), a stopper 400 including a first stopper 410 and a second stopper 420 having different lengths abuts against the end-side surfaces of the plurality of tubes 100. It may be provided so as to be, and may be configured to limit the depth into which the tube 100 is inserted. In addition, since the end-side surface of the tube 100 and the stopper 400 are formed to be in contact with each other, there is an advantage of being more firmly coupled when the inserted tube 100 is fixed through a process such as brazing. In addition, the plurality of stoppers 400 may be integrally formed with the header 200 as shown.

And, as described above, as the first stopper 410 is formed longer than the second stopper 420, only the first stopper 410 is formed in a partial front end area as shown in FIG. 7-(b). Can be deployed. In addition, in some other front cross-sectional areas, the inner space 101 of the tube 100 and the space formed by the header 200 and the tank without the first stopper 410 and the second stopper 420 are configured to communicate with each other. Can be.

Next, referring to FIG. 8, the header 200 may include a tube insertion opening 210 into which one end of the tube 100 is inserted, and a protrusion 220 protruding from the tube insertion opening 210. And the protrusion 220 may include a hollow portion 221 communicating with the tube insertion port 210, the stopper 400 including the first stopper 410 and the second stopper 420 is the It may be disposed in the hollow part 221 of the protrusion 220.

Here, the protrusion 220 may protrude in a direction opposite to the side where the tube 100 is disposed, and the stopper 400 may be disposed at an end of the hollow part 221 of the protrusion 220. Accordingly, the insertion depth of the inserted tubes 100 may be limited by the stoppers 400 disposed at each of the plurality of tube insertion holes 210, and the plurality of tubes may be The 100s may also be inserted into each other by a certain depth.

Next, referring to FIG. 9, an opening 110 may be formed on one end surface of the tube 100, and an end surface 111 may be formed around the opening 110. And when the tube 100 is inserted into the tube insertion port 210, the stopper 400 seals the opening 110 of the tube 100 and contacts the one end surface 111 of the tube 100 to provide an insertion depth. Can be limited.

In addition, one end of the tube 100 may be disposed on the hollow portion 221 of the tube insertion hole 210 and the protrusion 220. Accordingly, the outer surface 112 of one end side of the tube 100 may contact the inner surface 211 of the tube insertion port 210 and the hollow inner surface 222 of the protrusion 220, respectively.

Here, in the conventional heat exchanger manufacturing process, after inserting the tube onto the tube insertion port of the header, the step of fixing and coupling through a method such as brazing has been included. In the present invention, one end surface 111 of the tube 100 and one surface of the stopper 400 are in contact with each other, and the one end outer surface 112 and the inner surface 211 of the tube insertion port and the hollow inner surface 222 are in contact with each other. As a result, the bonding area is widened, so that the problem of incomplete welding can be improved, and there is an advantage of solving the problem of a conventional leak.

<Second Example>

10 is related to another embodiment of the heat exchanger according to the present invention, and FIG. 10 is a front cross-sectional view of a header. As shown in FIG. 10, the protrusion 220 may protrude toward the side where the tube 100 is disposed.

At this time, the stopper 400 including the first stopper 410 and the second stopper 420 having different lengths may be disposed on each tube insertion port 210. In addition, the outer surface of one end of the tube 100 is in contact with the inner surface of the tube insertion port 210 and the hollow inner surface of the protrusion 220, but the one end surface of the tube 100 may contact one surface of the stopper 400. have.

In addition, the stopper 400 may be integrally configured with the header 200. At this time, the header 200 may be bent double after the tube insertion hole is drilled to form the protrusion 220 and the stopper 400.

<Third Example>

11 to 13 are related to another embodiment of a heat exchanger according to the present invention, FIG. 11 is a perspective view of a tube, FIG. 12 is a cross-sectional view of the tube, and FIG. 13 is a plan cross-sectional view showing that the tube and the header are combined. Respectively.

First, referring to FIG. 11, the tube 100 may be configured in the form of a folded tube, and may include a partition wall 500 in a form in which a single workpiece is folded. Accordingly, the partition wall 500 may extend along the direction of both ends of the tube 100 and may be disposed on the opening 110 of the tube 100. Here, in the tube 100, a gap may be formed at a location where the partition wall 500 is formed, and the gap is frequently maintained even when coupled with the header 200. In this case, when the value of the gap is large, there is a problem in that during brazing bonding with the header 200, the welding agent cannot fill the gap, causing a leak or reducing durability due to incomplete welding.

To describe this in more detail with reference to FIG. 12, when the tube 100 is formed as a folded tube, one tube plate may be folded to have a shape as shown. At this time, both ends of the tube plate may be bent inward to form a partition wall 500, and the tube 100 may be divided into a plurality of flow spaces 100a and 100b based on the partition wall 500. . At this time, as both ends of the tube 100 are folded inward, a gap is generated outside the partition wall 500, and the gap has a certain length (g) or area. Here, if the gap is excessively long or wide, there is a problem in that the gap cannot be filled during brazing and thus leakage occurs.

In the present invention, as shown in FIG. 13, the stopper 400 formed in each tube insertion port 210 is disposed at a position opposite to the partition wall 500 of the tube 100, thereby more effectively improving the conventional problems. There is an advantage to that. At this time, as shown in FIG. 13-(a), the header 200 forms a hole through the tube insertion port 210 and the hollow part 221, and the stopper 400 is on the hollow part 221 It can also be placed. In such a case, when the tube 100 is inserted, the tube 100 may be inserted only up to one surface of the stopper 400, and the opening 110 of the tube 100 is connected to the hollow part 221 It can be fastened to communicate. In addition, when the folded portion of the tube 100 is disposed at an end portion in the longitudinal direction rather than at the center, the stopper 400 may be disposed at a position corresponding thereto.

In addition, the stopper 400 may be provided to increase a contact area during brazing by sealing one surface of the gap. Here, the length d of the stopper 400 may be formed to be equal to or greater than the length g of the gap described above, so that the stopper 400 may be formed to seal one surface of the gap of the tube 100.

In addition, the protrusion 220 of the present invention may guide the insertion of the tube 100 inserted from the upper and lower sides of the drawing. At this time, the protrusion 220 may be formed with an inner diameter corresponding to the outer diameter of the tube 100 so that the tube insertion port 210 and the hollow portion 221 are formed. In addition, the protrusion 220 may be divided into a plurality of regions. Here, the stopper 400 is not formed in one area, and the protrusion 220 forms a tube insertion opening 210 to guide the insertion of the tube 100, and in the other area, the stopper 400 ) May be configured to limit the insertion depth of the tube 100 by supporting both ends through the protrusion 220 as described above. In this case, the hollow part 221 may be a hole excluding the area of the stopper 400 from the area formed by the protrusion 220 in the other region, and may flow in or out according to the area of the hollow part 221 The flow rate of the outflow heat exchange medium can be adjusted.

The present invention is not limited to the above-described embodiments, and the scope of application 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.

10: core part 11: pin
20: header tank
100: tube 101: flow space
110: opening
111: one end surface 112: one end outer surface
200: header
210: tube insertion port 211: tube insertion port inner surface
220: protrusion 221: hollow part
222: hollow inner surface
300: tank
400: stopper
410: first stopper 420: second stopper
500: bulkhead

Claims (12)

A pair of tanks having an inlet port and an outlet port through which the heat exchange medium flows;
A plurality of tubes in which the heat exchange medium is flowed and spaced apart from each other in both directions;
A pair of headers including a plurality of tube insertion ports into which the plurality of tubes are respectively inserted on one surface, and the tank is coupled to the other surface; And
A plurality of stoppers disposed on at least two or more of the plurality of tube insertion ports to limit the insertion depth of the tube;
Including,
A heat exchanger, characterized in that some of the plurality of stoppers have different lengths to control the flow rate of the heat exchange medium distributed to adjacent tubes.
The method of claim 1,
The plurality of stoppers,
Including at least one or more first and second stoppers formed in different lengths,
The first stopper is formed to be longer than the second stopper,
The heat exchanger, characterized in that the first stopper is disposed closer to the inlet of the tank than the second stopper.
The method of claim 1,
The longest stopper among the plurality of stoppers,
Heat exchanger, characterized in that disposed at the tube insertion port closest to the inlet of the tank.
The method of claim 1,
Heat exchanger, characterized in that the tube insertion port of the header and the stopper are integrally formed with each other.
The method of claim 1,
The tube is disposed on one side of the header,
The header,
Further comprising a protruding portion protruding in the direction of the other surface from the tube insertion port, the hollow portion is formed,
Heat exchanger, characterized in that the stopper is disposed on the hollow of the protrusion.
The method of claim 5,
The tube,
The outer surface of one end is in contact with the inner surface of the tube insertion port,
Heat exchanger, characterized in that one end surface is in contact with the stopper.
The method of claim 6,
The stopper is disposed on the side of the hollow end of the protrusion,
Heat exchanger, characterized in that the outer surface of one end of the tube is in contact with the inner surface of the tube insertion port and the hollow inner surface of the protrusion, respectively.
The method according to claim 6 or 7,
The tube,
Heat exchanger, characterized in that brazing coupling with the tube insertion port of the header and the stopper
The method according to any one of claims 1 to 7,
The tube has a partition wall formed on the inner hollow part,
The stopper is a heat exchanger, characterized in that disposed so as to contact the partition wall of the tube.
The method of claim 9,
Heat exchanger, characterized in that the length of a stopper of some of the plurality of stoppers is formed equal to or longer than the length of the partition wall of the tube.
The method of claim 9,
The tube is composed of a folded tube formed with a gap formed outside the partition wall by bending the plate material from both sides,
Heat exchanger, characterized in that the length of the stopper is equal to or longer than the length of the gap.
The method of claim 1,
The header is composed of a pair, each coupled to both ends of the plurality of tubes,
A heat exchanger, characterized in that a plurality of stoppers are formed on each of the pair of headers.

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