KR20040094163A - laminated type heat exchanger with a protruding flange for header - Google Patents

Abstract

PURPOSE: A laminated type heat exchanger having protruded flanges at tank parts is provided to improve the durability of tank parts while minimizing loss of a pressure of a refrigerant by lengthening protruded flanges. CONSTITUTION: A plurality of tube elements(22,24) formed by bonding a pair of formation plates(22a,24a) are laminated on both sides of fins. Path container parts(42) are formed at the formation plates to form a refrigerant path inside. Tank container parts(52,54) form tank parts(26,28) for collecting and flowing the refrigerant. The tank container parts have welded parts(52b,54b) to be welded to the tank container part of the adjacent tube element. Communication holes(52a,54a) are formed at the welded parts to be communicated with the adjacent tank container part. Protruded flanges(60) are formed at one sides of the formation plates, protruded from inner peripheral surfaces of the communication holes to the outside of the welded parts, wherein the protruded flanges are formed at parts far from the path container parts.

Description

Laminated type heat exchanger with a protruding flange for header}

The present invention relates to a laminated heat exchanger, which is suitable for use as an evaporator of a vehicle air conditioner and relates to a laminated heat exchanger having a protruding flange in a tank portion.

In general, as shown in FIG. 1, a plurality of first and second tube elements 2 and 4 are welded to each other, and a refrigerant passage is formed therein, and a refrigerant passage is formed below the refrigerant passage. First and second tanks 6 and 8 are formed to collect and flow the coolant flowing in the passage, and a coolant inlet or outlet to allow the coolant to enter and exit the first tank 6 on one side of the second tube element. 10 and 12 are formed, respectively, and the pleat pins 14 are disposed between the first and second tube elements 2 and 4 so that the refrigerant flowing in the refrigerant passage and the external air are easily exchanged with each other. It is.

In the longitudinal middle part of the first tank part 6, two divisions are performed such that the refrigerant introduced into the first tank part 6 from the refrigerant inlet part 10 does not flow toward the refrigerant inlet part 12. Partitions are formed to form the tanks 6a and 6b.

The first and second tube elements 2 and 4 have a generally rectangular shape, and are joined to each other so that a space can be formed therein by two forming plates, and the first and second tube elements 2 and 4 are formed at one end in the longitudinal direction of the forming plate. Tank container parts 16 and 18 are formed to form second tank parts 6 and 8, and passages form a U-type refrigerant passage from the one tank container part 16 toward the other tank container part 18. The container part 20 is formed.

As shown in Fig. 2, the tank vessel portions 16 and 18 have welding portions 16b and 18b having flat surfaces so as to be welded to the tank vessel portions of adjacent tube elements. 18b), communication holes 16a and 18a communicating with adjacent tank containers are formed.

In the stacked heat exchanger configured as described above, the refrigerant flowing into the heat exchanger through the refrigerant inlet unit 10 is divided into a split tank 6a on the left side, a U-shaped refrigerant passage, a left side portion of the second tank portion 8, and a second tank portion. After passing through the right side of the right side, the U-shaped refrigerant passage, and the right side divided tank (6b) in order to exchange heat with the outside air by the corrugated fins 14, and then to the refrigerant pipe through the refrigerant inlet (12) Spills.

By the way, in the conventional laminated heat exchanger comprised in this way, in order to weld each tube element, the welding parts 16b and 18b are formed in the tank container parts 16 and 18, and this welding part makes the passage area of a refrigerant small, and a tank By repeating the rapid reduction and enlargement of the refrigerant flow area flowing in the negative longitudinal direction, unnecessary pressure loss is generated. In order to solve this problem to minimize the area of the welded to solve, but this has a problem of lowering the durability has not been a practical solution.

On the other hand, U.S. Patent No. 5,918,664 forms a protruding flange bent in the refrigerant flow direction over the entire inner circumferential surface of the communication holes (16a, 18a) to improve durability, assembly and weldability, but to the interior of the passage container portion 20 Since there is a restriction on the length of the protruding flange because it hinders the flow of the refrigerant flow, it does not solve the problem of pressure loss for the longitudinal flow of the tank.

Accordingly, the present invention has been made to solve the above problems, and an object of the present invention is to provide a laminated heat exchanger that not only improves durability of the tank portion but also minimizes pressure loss of the refrigerant at the same time.

1 is a perspective view showing a conventional laminated heat exchanger,

FIG. 2 is a sectional view showing a part of the tank unit in FIG. 1; FIG.

3 is a perspective view showing a laminated heat exchanger to which the present invention is applied;

4 is a sectional view showing a part of a tank part having a protruding flange according to the first embodiment of the present invention;

5 is a sectional view showing a part of a tank part having a protruding flange according to a second embodiment of the present invention;

6 is a view showing a position where the coolant flow guides shown in FIGS. 4 and 5 are installed.

<Description of the symbols for the main parts of the drawings>

22: first tube element 24: second tube element

26: first tank portion 26a, 26b: split tank

28: 2nd tank part 30, 32: refrigerant access part

34: corrugated pin 42: passage container

52, 54: tank container 52a, 54a: communication hole

52b, 54b: welded part 60, 60 ': protruding flange

Laminated heat exchanger according to the present invention, a plurality of tube elements formed by bonding a pair of molded plate is formed by laminating the pins between, the molded plate is provided with a passage vessel portion to form a refrigerant passage therein while In a stacked heat exchanger having a tank vessel portion forming a tank portion so that refrigerant flowing in a refrigerant passage flows, the tank vessel portion includes a weld portion welded to a tank vessel portion of an adjacent tube element, and the tank portion adjacent to the weld portion. A communication hole is formed in communication with the part, and one side forming plate of the tube element is provided with a protruding flange protruding outward from the welded part of the inner circumferential surface of the communication hole formed therein to a part far from the passage container part, or the tube element. Both sides of the molded plate of the passage vessel portion of the inner peripheral surface of the communication hole formed therein That is the side portion of the protruding flange projecting inside the welding portion is formed is characterized.

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

3 is a perspective view showing a laminated heat exchanger to which the present invention is applied. As shown in the drawing, a plurality of first and second tube elements 22 and 24 are welded to each other, and the first and second tank parts are formed so that the refrigerant flowing in the refrigerant passage flows in the lower portion of the refrigerant passage formed therein. 26 and 28 are formed, and coolant access portions 30 and 32 are formed on one side of the second tube element 24 to allow refrigerant to enter and exit the first tank portion 26, respectively. Between the first and second tube elements 22 and 24, corrugated fins 34 are disposed to facilitate heat exchange between the refrigerant flowing in the refrigerant passage and the external air, and the first tube element 22 coupled to the outermost portion is disposed on the outermost first tube element 22. An end tube element 36 is welded through the corrugated pin 34, and an end plate 40 is welded to the outer side of the end tube element 36 via an end wrinkle pin 38.

In the longitudinal middle portion of the first tank portion 26, two divisions are performed such that the refrigerant flowing into the first tank portion 26 from the refrigerant entering portion 30 does not flow toward the refrigerant entering portion 32. A partition (not shown) is formed to form the tanks 26a and 26b.

The first and second tube elements 22 and 24 and the end tube element 36 have a generally rectangular shape, and are joined to each other so that a space can be formed therein by the forming plates 22a, 24a and 36a. That is, the first tube element 22 is formed by two joining plates 22a face to face, and the second tube element 24 is formed by two joining plates 24a face to face, the end The tube element 36 is formed by face-joining the forming plates 22a and 36a.

The molded plates 22a, 24a, and 36a are made of aluminum or an aluminum alloy, and have a thickness of 0.4 mm to 0.6 mm, and a passage container portion 42 is formed to form a refrigerant passage in the longitudinal direction thereof. The partition wall portion 44 is formed in the middle of the passage vessel portion 42 so as to divide both sides to form the passage vessel portion 42 in a U-shape, and the forming plates 22a, 24a, and 36a at the edge thereof. A welding portion 46 is formed to be welded to each other, and the passage vessel portion 21 has a shape in which an embossed portion 48 is formed to protrude to make the refrigerant flow turbulent. At this time, the partition wall portion 44 and the embossed portion 48 are also welded to each other.

A bent portion 50 is formed at the upper end portions of the forming plates 22a and 24a, and the tank vessel portions 52 are formed at the lower end portions of the forming plates 22a and 24a. 54) is formed. In addition, coolant tubes 56 and 58 for guiding the coolant are welded to the coolant inlets and outlets 30 and 32 formed by the forming plate 24a.

The tank vessel portions 52 and 54 communicate with each other by the communication holes 52a and 54a to form the division tanks 26a and 26b and the tank portion 28. The surfaces on which the tube elements adjacent to each other are welded in the tank vessel portions 52 and 54 are flat to form weld portions 52b and 54b. Protruding flanges (shown in FIGS. 4 and 5) described later are formed in the communication holes 52a and 54a.

The upper and lower edges of the end plate 40 are bent inwardly in an amount to surround the end crimp pin 38.

4 is a cross-sectional view showing a part of a tank part having a protruding flange according to the first embodiment of the present invention. As shown, the protruding flange 60 is formed only on one side forming plate (22a, 24a) of the tube element (22, 24), the protruding flange 60 is a tank container forming the tank portion (26, 28) The inner peripheral surfaces of the communication holes 52a and 54a formed in the portions 52 and 54 protrude outward of the welded portions 52b and 54b. At this time, the protruding flange 60 is formed only in a portion far from the passage container portion 42 in the inner circumferential surfaces of the communication holes 52a and 54a.

The protruding length (L: the length protruding from the inner surface of the welded portion) of the protruding flange 60 is the height of the passage container portion 42 (A: the distance from the center of the tube element to the inner surface of the passage vessel projected) and the tank. The height of the container parts 52, 54 (B: distance from the center of the tube element to the inner surface of the protruding tank container part) is determined. The projection of the protruding flange is based on the height A of the path container part. The length L and the height B of the tank container are determined as follows in terms of increasing durability and reducing pressure loss.

That is, L = 3.00 A to 6.25 A

B = 5.00 A-7.50 A

According to the above relation, specifically, the height A of the passage vessel portion is 0.8 to 1.0 mm, the height B of the tank vessel portion is 5.0 to 6.0 mm, and the protrusion length L of the protruding flange is It is preferable to set it as 3.0-5.0 mm.

The protruding flange 60 is formed of a plate and protrudes horizontally along the longitudinal direction of the tank portions 26 and 28.

5 is a cross-sectional view showing a part of a tank part having a protruding flange according to a second embodiment of the present invention. As shown, protruding flanges 60 'are formed on both forming plates 22a and 24a of the tube elements 22 and 24, and the protruding flanges 60' form the tank portions 26 and 28. As shown in FIG. The inner peripheral surfaces of the communication holes 52a, 54a formed in the tank vessels 52, 54 protrude inwardly of the welded portions 52b, 54b. At this time, the protruding flange 60 'is formed only in a portion of the inner circumferential surfaces of the communication holes 52a and 54a far from the passage container portion 42.

The protruding length (L ') of the protruding flange 60 is a protruding length from the outer surface of the welded portion), and the height of the passage container portion 42 (A': distance from the center of the tube element to the inner surface of the protruding passage container portion). And the height B 'of the tank vessels 52 and 54 (the distance from the center of the tube element to the inner surface of the tank vessel projecting), which is based on the height A' of the passage vessel, The protruding length L 'of the protruding flange and the height B' of the tank container are determined as follows in terms of increasing durability and reducing pressure loss.

That is, L '= 1.50 A' to 3.13 A '

B '= 5.00 A' to 7.50 A '

According to the above relation, specifically, the height A 'of the passage vessel portion is 0.8 to 1.0 mm, the height B' of the tank vessel portion is 5.0 to 6.0 mm, and the protrusion length L of the protruding flange. ') Is preferably 1.5 to 2.5 mm.

The protruding flange 60 is formed of a plate and protrudes horizontally along the longitudinal direction of the tank portions 26 and 28.

FIG. 6 shows a position where the protruding flanges shown in FIGS. 4 and 5 are installed. As shown, the protruding flanges 60 and 60 'form a lower side (path vessel portion) that forms half of the inner circumferential surface of the communication holes 52a and 54a formed in the weld portions 52b and 54b of the tank vessel portions 52 and 54, respectively. Is installed on the far side).

In the stacked heat exchanger according to the present invention configured as described above, the refrigerant flowing into the heat exchanger through the refrigerant inlet 30 is U-shaped refrigerant passage formed in the split tank 26a, the passage vessel 42, and the second. The corrugated pin 34 is sequentially passed through the U-shaped refrigerant passage formed by the left side of the tank portion 28, the right side of the second tank portion 28, and the passage vessel portion 42, and the split tank 26b. After the heat exchange with the outside air, and flows out to the refrigerant pipe through the refrigerant inlet (32).

At this time, the protruding flanges (60, 60 ') formed in the tank container (52, 54) not only improves the durability of the tank portion, but also guides the refrigerant flowing in the horizontal direction in the first and second tank portions (26, 28). It serves to reduce the pressure loss of the refrigerant.

In addition, since the protruding flange is not formed at the side close to the passage vessel 42, the refrigerant flows smoothly in the passage vessel 42 without disturbing the passage. As such, the structure in which the protruding flanges 60 and 60 'are formed only on the side away from the passage container part 42 can increase the protruding length L of the protruding flanges 60 and 60', thereby minimizing the pressure loss. have.

The present invention is not limited to the above embodiment and can be modified in various ways.

That is, in the above embodiment, a heat exchanger having a tube element having a U-type refrigerant passage is stacked as an example, but may also be applied to a heat exchanger having a tube element having a straight refrigerant passage formed with tank containers on both sides thereof.

According to the multilayer heat exchanger according to the present invention, not only the durability of the tank portion is improved but also the pressure loss of the refrigerant is simultaneously minimized.

Claims (4)

A plurality of tubular elements formed by joining a pair of molded plates are formed by laminating the pins therebetween, wherein the molded plate is provided with a passage container portion to form a refrigerant passage therein while the refrigerant flowing in the refrigerant passage gathers therein. In the stacked heat exchanger having a tank container portion forming a tank portion, The tank container portion has a welding portion welded to the tank container portion of the adjacent tube element, the welding portion is formed with a communication hole communicating with the adjacent tank container portion, A protruding flange is formed only on one side of the forming plate of the tube element, wherein the protruding flange protrudes outward from the welded portion in a portion of the inner circumferential surface of the communication hole away from the passage vessel. The method of claim 1, The height of the passage vessel, which is the distance from the center of the tube element to the inner surface of the passage vessel projecting, is A, and the height of the tank vessel, which is the distance from the center of the tube element to the inner surface of the tank vessel projecting, is referred to as B. When the protruding length of the protruding flange which is the length protruding from the inner surface of the welded portion is L, L = 3.00 A to 6.25 A B = 5.00A ~ 7.50A satisfying the laminated heat exchanger. A plurality of tubular elements formed by joining a pair of molded plates are formed by laminating the pins therebetween, wherein the molded plate is provided with a passage container portion to form a refrigerant passage therein while the refrigerant flowing in the refrigerant passage gathers therein. In the stacked heat exchanger having a tank container portion forming a tank portion, The tank container portion has a welding portion welded to the tank container portion of the adjacent tube element, the welding portion is formed with a communication hole communicating with the adjacent tank container portion, A protruding flange is formed on both side forming plates of the tube element, wherein the protruding flange protrudes inward from the passage portion of the inner circumferential surface of the communication hole to the inside of the weld portion. The method of claim 3, The height of the passage vessel, which is the distance from the center of the tube element to the inner surface of the passage vessel projecting, is called A ', and the height of the tank vessel, which is the distance from the center of the tube element to the inner surface of the tank vessel projecting, is referred to as B'. When the protruding length of the protruding flange which is the length protruding from the outer surface of the welded portion is L ', L '= 1.50 A' to 3.13 A ' B '= 5.00A' ~ 7.50A 'laminated heat exchanger characterized in that.