KR101078554B1 - The disk type heat exchanger - Google Patents

Abstract

The present invention relates to a disc type heat exchanger having a rim reinforcement, and more specifically, to form a corrugation along the outer edge of the heat exchange plate, as well as to join and reinforce by brazing, so that the durability and performance of the heat exchanger can be significantly improved. In the present invention, the first heat transfer plate and the second heat transfer plate is laminated by brazing in multiple stages, the disc type heat exchanger having a heating heat passage and a heated heat transfer passage for each layer of the heat exchange plate, wherein the heat exchange plate has an outer edge portion Forming a reinforcing frame having a corrugated portion of the corrugated portion and brazing and joining the concave portion and the protrusion of the corrugated portion, wherein the reinforcing frame is the same shape and overlapping so that the first heating plate and the second heating plate overlap the top / bottom And joining the pleats, the recesses and the protrusions of the adjacent first and second heat transfer plates. Proposes an on four borders of the heat exchanger type, characterized in that the reinforcement disc to the junction structure of the.

Heat exchanger plate, heat transfer plate, brazing, reinforcement frame, corrugation part.

Description

Disk type heat exchanger with reinforced frame

The present invention relates to a disk type heat exchanger having a rim reinforced, and more particularly, by forming a reinforcing frame along the outer edge of the heat exchanger plate and joining and brazing to reinforce, thereby improving the durability and performance of the disk type heat exchanger. Disc type heat exchanger with reinforced edges.

In general, a disk type heat exchanger is formed by stacking a first heat transfer plate of type A and a second heat transfer plate of type B having a predetermined pattern of heat exchange paths in multiple stages. It is made to exchange heat with each other as the fluid flows, and the structure is the simplest, small size and light weight, and has excellent heat exchange efficiency. Therefore, it is widely used in an evaporator, a preheater, a condenser of a boiler or a freezer.

Looking at such a disk type heat exchanger schematically.

1 is a plan view showing a general disk type heat exchanger, Figure 1a is a cross-sectional view taken along the line "A"-"A" of FIG. Referring to the above drawings, the heat exchanger 1 according to the related art forms a heat exchange plate 1 by joining a pair of first and second heat transfer plates 2a and 2b to each other and to form a heat exchange plate 1. Is laminated in multiple stages. The heat exchange plate is connected to flow holes 5a provided at both sides of a plurality of heated or heated heat transfer paths 5. After joining by general argon (Ar) welding (W) along the outer circumference of the edge portion 3 of the heat exchange plates (2a, 2b), it is finished.

However, when the thickness of the base material during the argon welding of the heat exchanger plate is thin, there are disadvantages such as bending of edges or deformation due to heat and melting. The edge joints of the heat exchanger plates are very fragile and leak or break due to fatigue. Frequently, problems have arisen.

In addition, the disk type heat exchanger according to the prior art is a 'disk type heat exchanger' of Korean Patent Application No. 1999-24440. However, due to the welding deformation along the outer edges of the first heat transfer plate and the second heat transfer plate, the deformation of the plate due to heat deformation and spring back phenomenon of the heat transfer plate in which the heat transfer path is formed, In addition, the defect of the pulsation that occurs when the fluid flows due to the lack of closeness of the second heat exchanger plate, as well as causing damage, acts as a major cause of pressure leakage, leakage, etc. There was a problem.

In particular, the edge junction portion of the heat exchanger plate is bonded to the width of 3mm on average, during the leak test, when the test pressure is applied to the inside of the heat exchanger, the heat exchanger expands and the distance between the heat transfer plate and the heat transfer plate becomes far, As the edges of the heat exchanger were stretched like wrinkles, there was a problem of breakage. For example, in the case of a 700RT class heat exchanger, even if the test pressure of 2kg / ㎠ causes a huge explosion corresponding to the internal volume, the risk of a safety accident is serious, and the situation needs urgent improvement.

In the case of joining the heat exchanger plate by welding, only the visible part, that is, the outer edge of the heat exchanger can be joined, resulting in poor joining, resulting in thermal deformation due to the heating of the base metal, and poor welding during welding. Due to this, impurities, foreign substances, etc. are introduced into the heat exchanger, causing serious damage, so special care is required.

Or, it is disclosed as a 'bonding structure and joining method of the heat exchange plate' of the Korean Patent Application No. 2004-16961, etc., and the edge of the heat transfer plate constitutes a bending band that is banded by pressing in multiple stages, detailed description thereof will be omitted. Shall be.

On the other hand, the prior art comprises a banding portion bent by pressing the edge of the heat transfer plate in multiple stages.

However, when a high pressure pressure is applied to the inside of the heat exchanger, the outer edge portion is vulnerable, which is not suitable for the high pressure heat exchanger. That is, there is a problem in that the edge portion exposed to the outside of the heat exchanger is crushed or damaged while being damaged by an external impact force or a structure, thereby increasing the risk of occurrence of leakage.

In addition, the press and banding work process for forming the bending portion of the heat exchanger plate is not only complicated and multi-stage, but also the production process is delayed, the production process is delayed, the production cost is increased and the incidence of defects is increased. In order to bend and fold the round heat exchanger plate to the inside, cracking occurs in the banding portion or poor contacting implies a defect in which the bending surface is not constant. Rather, there is a problem in that the bending portion is weak and leaks and breaks.

As mentioned above, in the case of welding or bending of heat exchanger plates, the incidence of defects increases, and it is uneconomical, such as workability, workability, productivity, and the disadvantage of significantly lowering the production cost, as well as increasing the price of the product. However, there have been problems that the industrial applicability is significantly lowered.

In the present invention, by improving the durability by forming the corrugated portion at the edge of the heat exchanger plate to enhance the durability as well as by brazing each heat exchanger plate and the outer corrugated portion in quadruple to improve the durability without deformation or damage of the heat exchanger plate itself and hermetic heat exchanger The purpose is to provide.

In addition, the present invention provides a disc type heat exchanger with a rim reinforced with excellent corrosion resistance as well as heat conductivity inside the heat exchanger by the brazing bonding is made by the brazing filler (bonding member) is inserted between the heat exchange plate. There is another purpose.

The present invention is a disk type heat exchanger having a first heat transfer plate and a second heat transfer plate laminated in multiple stages and brazed and having a heating heat passage and a heated heat transfer passage for each layer of the heat exchange plate, wherein the heat exchange plate is formed along an outer edge thereof. Forming a reinforcing frame having a corrugated portion of the corrugation and brazing and joining the indentation and the protrusion of the corrugated portion, wherein the reinforcing frame is the same shape and overlapping so that the first heating plate and the second heating plate overlap the top / bottom The present invention proposes a disk type heat exchanger having a rim reinforcement, characterized in that a four-join structure is formed by joining the pleats, the concave portions, and the protrusions of other adjacent first and second heat transfer plates.

According to the present invention, the reinforcing frame of the edge of the heat exchanger plate is composed of a disk type heat exchanger reinforced with four layers while overlapping the heat exchanger plate in four layers, thereby reinforcing the edge of the disc type heat exchanger that is bent, deformed or weak. The durability of the heat exchanger can be further improved. Particularly, the outer edges of the heat exchanger plates are brazed in four layers so as to have excellent airtightness, increase the pressure of the high pressure acting on the inside of the heat exchanger, and have a structure suitable for the high pressure heat exchanger. It provides excellent effect of quality improvement, safety and reliability. In addition, the high-pressure fluid can flow into the heat exchange plate, thereby reducing the thickness of the shell or the chamber.

In addition, the present invention has a lattice honeycomb structure in which the outer edge portion of the heat exchanger brazing bonded when the connection is used to stack the heat exchange plate in multiple stages to be curved bonded to minimize the damage due to structural rigidity and external impact force In addition to preventing damage to the aircraft itself, it has the effect of significantly extending the life of the device.

Alternatively, the present invention is made of a brazing filler for brazing bonding is made of copper, or a copper alloy mainly made of copper, titanium, nickel alloys to prevent corrosion, and excellent corrosion resistance of the interior as well as extending the life, thermal conductivity This superiority can greatly improve the performance of the heat exchanger, and also accompanied by the excellent effect of significantly improving the performance of the heat exchanger.

In addition, the present invention can be used even less than 0.4mm thickness of the heat exchanger plate itself to reduce the cost of raw materials, as well as to join several heat exchanger plates by brazing at the same time, the productivity is excellent and mass production is possible, There are very economic advantages, such as a significant reduction in production costs.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and embodiments of the present invention are provided to enable those skilled in the art to more easily understand the present invention. In describing the present invention, when it is determined that the detailed description of related known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description thereof will be omitted.

Figure 2 is a plan view showing a disk type heat exchanger of the rim is reinforced according to a preferred embodiment of the present invention, Figure 2a is a cross-sectional view "B"-"B" of Figure 2, Figure 2b is a "C" of Figure 2a "C" line side view.

Referring to the above drawings, the present invention, the first heat transfer plate (10a) and the second heat transfer plate (10b) is laminated in multiple stages by brazing, the heating heat flow path (12a) and the heat transfer heating for each layer of the heat exchange plate (10) In the disc type heat exchanger having a flow path 12b, the heat exchange plates 10 and 10 'form a reinforcing frame 20 having corrugated portions 22 and 22' along the outer edge thereof and the corrugated portion Brazing the concave portion 20a and the projection 20b of 22 and 22 'with each other, wherein the reinforcing frame 20 includes the first heat transfer plate 10a and the second heat transfer plate 10b stacked up and down. While the pleats 22 are of the same shape and overlapped with each other, the pleats 22 ', the concave portions 20a, and the protrusions 20b of the other adjacent first and second heat transfer plates 10a and 10b are joined to each other. It is characterized in that the junction structure in the.

The above is described in more detail as follows.

Disc type heat exchanger according to the present invention comprises at least one or more of a plurality of heat exchange plates (10, 10 '), the first heat transfer plate (10a) having a heat transfer path (12a) and the heat transfer path to be heated (12b) By alternately stacking the second heat exchanger plate 10b in multiple stages and joining by brazing, the heating heat exchange path 12a and the heat transfer heat exchange path (between the first heat transfer plate 10a and the second heat transfer plate 10b) ( 12b) are alternately formed. Brazing filler (BF) is attached to the surface between the first, second heat transfer plate (10a, 10b) by brazing. The heating heat exchange passage 12a is connected to both side flow holes 16.

In particular, the heat exchange plate (10, 10 ') is formed with a corrugated reinforcement frame 20 along the outer edge portion, the reinforcement frame 20 is concave recessed portion (22a) and convex protrusions along the edge portion It consists of the wrinkle part 22 in which 22b is repeatedly formed.

Next, the disk-type heat exchanger according to the present invention is made of a lattice honeycomb structure of the outer circumferential surface of the heat exchanger plates 10 and 10 'joined in multiple stages as described above, and is very robust and durable.

That is, the heat exchange plate (10, 10 ') is laminated in multiple stages to be bonded by a conventional brazing process, wherein the reinforcing frame is also bonded by brazing together. To this end, a brazing filler (BF) is also inserted into the reinforcement part of the heat transfer plate and uniformly brazed.

In other words, when the heat exchange plates 10 and 10 'are stacked, the pleats 22 and 22', that is, the concave portions 22a of the upper heat exchanger plate and the protrusion 22b of the lower heat exchanger plate are in contact with each other and are in contact with each other. (BF) is inserted and brazing is performed.

The heat exchanger plates brazed as described above are connected to the heating channel 12b by the lattice-shaped holes between the corrugations 22 and 22 ', that is, between the reinforcing frames 22a and the protrusions 22b, as shown in FIG. 2A. As a result, heat is exchanged with the heat medium flowing through the heating passage 12a.
More specifically, the reinforcing frame 20 of the heat exchanger plates 10 and 10 'has a honeycomb structure in which the first heat exchanger plate 10a and the second heat transfer plate 10b are quadrupled. This reinforces the periphery of the heat transfer plate around the heat exchanger plate by brazing the second heat transfer plate 10b formed in the same shape as the first heat transfer plate on the upper and lower outer surfaces of the first heat transfer plate 10a to be brazed. More robust and much better durability.

As such, the first and second heat transfer plates 10a and 10b are laminated in multiple stages, and the brazing portions of the heat exchange plates 10 are also brazed together at the same time, thereby bonding the heat exchange plates separately. The process can be omitted, the process can be simplified, as well as the productivity can be significantly improved.

Alternatively, the heat exchanger is formed by stacking heat exchange plates 10 and 10 'in multiple stages to form a honeycomb, wherein the recesses and protrusions are bent into a smooth curve and joined to have a rhombic lattice structure with curved edges. The recesses and protrusions of the corrugations 22 and 22 'expand the contact area in a gentle curve, thereby improving the bonding property of the brazing and making it firm. In this case, the heat exchange plates 10 and 10 'may have a six-sided honeycomb structure having an outer circumferential surface as if the corners are curved, thereby making it more durable and improving durability.

As described above, the disc type heat exchanger of the present invention is more robust and durable through the lattice honeycomb structure of the reinforcing frame, which can increase the pressure applied to the inside of the heat exchanger as well as prevent damage by external impact force. And significantly extend the life of the device.

In addition, the reinforcing frame 20 of the present invention is preferably formed by the pleats 22, 22 'by a general mold and press working, which is suitable for improving the productivity in the processing of the disk-type heat exchanger plate It is a processing method. In addition, the brazing filler (BF) is also press-processed in the same manner as the heat transfer plate to form wrinkles.

Alternatively, the reinforcing frame 20 may be formed by separately forming a wrinkle part through a processing process. For example, the reinforcing frame 20 passes between molding rollers having a tooth shape in a shape corresponding to the wrinkle parts 22 and 22 '. It can also be press-molded while making. At this time, it is preferable that the first and second heat transfer plates are stacked and molded at the same time.

As described above, the present invention forms the reinforcing frame 20 on the outside of the heat exchanger plate and brazes the bond, thereby exposing the edge of the heat exchanger to a relatively fragile edge portion with sufficient structural strength to significantly improve durability. You can do it. In particular, the pressure applied to the inside of the disc type heat exchanger can be increased by more than 5 times, so it is suitable for high pressure heat exchangers, and it is possible to significantly improve the stability and performance of the heat exchanger, such as improving leakage by preventing leakage. .

1 is a plan view showing a typical disk type heat exchanger.

1A is a cross-sectional view taken along the line “A”-“A” of FIG. 1.

Figure 2 is a plan view showing a disk type heat exchanger of the rim reinforced in accordance with a preferred embodiment of the present invention.

FIG. 2A is a cross-sectional view taken along the line “B”-“B” of FIG. 2.

FIG. 2B is a side view taken along the line “C”-“C” of FIG. 2A;

Claims (2)

Disk type heat exchange having the first heat transfer plate 10a and the second heat transfer plate 10b laminated in multiple stages and brazed and having a heat transfer path 12a and a heat transfer path 12b for each layer of the heat exchange plate 10. In the phase, The heat exchange plates 10 and 10 'form a reinforcing frame 20 having corrugated portions 22 and 22' along the outer edges, and the recessed portions 20a of the corrugated portions 22 and 22 'and Brazing the protrusions 20b with each other, The reinforcement frame 20, Wrinkles of the other first and second heat transfer plates 10a and 10b adjacent to each other while the first heat transfer plate 10a and the second heat transfer plate 10b overlap the top and bottom with the wrinkle portions 22 having the same shape. 22 '), a disk type heat exchanger having a rim reinforcement, characterized in that the joining portion 20a and the protrusion 20b are joined to form a quadruple bonding structure. delete

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