KR101972523B1 - Welded type plate heat exchanger for improved pressure resistant - Google Patents

Abstract

The present invention relates to a welded plate-shaped heat exchanger with improved pressure resistance and, more specifically, to a welded plate-shaped heat exchanger with improved pressure resistance which can expect high pressure resistance under a high pressure by welding and coupling spacers on edges in a width direction of electric heat plates in a longitudinal direction of the electric heat plates and coupling a plurality of supporters to surfaces of adjacent electric heat plates by welding. The welded plate-shaped heat exchanger with improved pressure resistance comprises: a plurality of electric heat plates arranged at regular intervals to form flow paths of a plurality of working fluids; spacers arranged on edges in a width direction of the electric heat plates in a longitudinal direction of the electric heat plates to forms gaps between the electric heat plates; a plurality of supporters installed to connect both ends thereof to surfaces of adjacent electric heat plates facing each other; and an outer wall plate installed to enclose the plurality of electric heat plates.

Description

[0001] WELDED TYPE PLATE HEAT EXCHANGER FOR IMPROVED PRESSURE RESISTANT [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a welded plate type heat exchanger with improved pressure resistance, more particularly, to welding a spacer along the longitudinal direction of the heat transfer plate to the widthwise edge of the heat transfer plate, and welding a plurality of supporters to the surface portion of the adjacent heat transfer plate Type plate-type heat exchanger with improved pressure resistance that can be expected to have high pressure resistance under high pressure.

Generally, heat exchangers are for transferring heat from one fluid (or gas) to another without physical contact. In other words, it is a device that is used when indirectly heating or cooling one fluid by transferring only heat without mixing the fluids.

Such a heat exchanger having a large size is effective, and the unit price of the heat exchanger is increased in proportion to the size. Therefore, it is important to perform a large amount of heat exchange by a small amount of cost. Among the types of heat exchangers, Shell & Tube type has very little heat exchange compared to its size. Therefore, there is a lot of development for plate heat exchangers having high heat exchange performance. to be.

These welded plate type heat exchangers are divided into a completely welded type and a semi-welded type. According to the manufacturing method, there are a brazing manufacturing method which is manufactured in a vacuum furnace and an automatic welding (laser welding, seam welding, CO ₂ welding, Welding, etc.).

This type of heat exchanger can be used in a wide range of environments, from low / high pressure, high temperature / high pressure, small capacity to large capacity.

As described above, the joining is performed by brazing or welding with the joining technique of the plate heat exchanger. In general, joining techniques of metals are classified into welding, brazing, and soldering.

Welding is a process of fusion bonding a base material and a bonding material to a melting temperature by a heat source, causing heat distortion such as twisting or bulging due to thermal stress. In particular, a smile, In the case of precision parts, the thermal deformation has a disadvantage that it hits the part itself.

In addition, Brazing uses brazing materials having a melting temperature lower than that of the base material to melt the base material without melting the base material, and then, by using the spreading property, wettability and capillary phenomenon of the molten metal with a narrow gap between the two base materials, As a method of joining, it is a joining method for preventing deformation and damage of a product while maintaining an appropriate strength.

At this time, more than 450 degrees based on the melting temperature of the fusible material is referred to as brazing, and below that, soldering is distinguished from each other.

The soldering refers to melting solder having a melting point lower than that of any metal between the solid metal and the solid metal to absorb and bond the solder by capillary phenomenon.

It is necessary to generate a diffusion or an intermetallic compound-generating reaction between the solid metal and the solder, and the metal which does not cause all the reactions can not be soldered. Depending on the heating method, such methods as iron soldering, immersion soldering, infrared soldering, laser soldering, vapor soldering and the like are available.

Brazing is one of bonding methods of metallic materials and non-metallic materials. First of all, brazing is a method of bonding a metallic material or a non-metallic material by heating the joint at a temperature below the melting point of a base material of 450 DEG C or higher, Technology.

More particularly, the present invention relates to a brazing alloy having a melting point of 450 ° C. or higher and heating the brazing alloy to a temperature below the solidus temperature of the base material, melting only the brazing alloy and then using a wetting phenomenon and a capillary phenomenon, .

Here, the liquidus temperature refers to the temperature at which the solid is formed by cooling the liquid, and the temperature at which the solid is completely changed into liquid when the solid is melted by raising the temperature or the temperature at which the solid is initially formed.

Examples of the brazing method include furnace brazing, vacuum brazing, and torch brazing, DIP brazing, high frequency brazing, and resistance brazing. Here, high-frequency / resistance brazing is mainly used for mass production of a heat source by using high-frequency or resistance heat.

In addition, furnace brazing is a method of heating the inside of a furnace while inserting a filler material into a brazing joint in advance, applying a flux, or maintaining an atmosphere having a flux-like action inside the furnace.

Vacuum brazing is a method similar to furnace brazing, but using vacuum instead of flux. DIP brazing is a method of immersing a member to be joined in a flux heated to a molten filler material or a brazing working temperature to be.

Also, torch brazing is a method of applying heat locally to the brazing torch by using a filler material locally only to the portion to be brazed when local part brazing is required.

This is because it is difficult to satisfactorily satisfy the characteristics due to the partial corrosion of the surface of the material or the partial thermal stress of the base material when the applied material is applied to the microwave parts and the fillet phenomenon is not uniform. Do not use it because it causes.

The above-described brazing bonding technique has advantages such as strong bonding strength, increase in joint surface ductility, ease of operation and economy, improvement of bonding property of different materials, prevention of leakage and leakage, as well as little deformation or current stress of the base material, Which is widely used throughout the industry.

1, a conventional plate heat exchanger 1 to which the above bonding technique is applied comprises a front plate 11 forming a front surface, a rear plate 12 forming a rear surface, And a heat transfer plate (13) laminated between the first fluid passage (11) and the rear plate (12) to form a first fluid passage and a second fluid passage so that heat exchange is performed between the first fluid and the second fluid A first inlet / outlet port 14a formed at a diagonal corner of the front plate 11 to allow fluid to flow in and out of the first flow passage 14a and a first inlet / And a second inlet / outlet port 15 (15a) formed at an edge portion for allowing the fluid to flow in and out of the second flow path.

That is, the high-temperature fluid flows into the first inlet port 14, transfers heat to the heat transfer plate 13 via the first fluid flow path, and is discharged to the first outlet port 14a. The low-temperature fluid flows into the second inlet port (15) and flows out to the second outlet port (15a) via the second fluid channel. At this time, heat is absorbed from the heat transfer plate (13), and the fluid becomes a high temperature state.

In the plate heat exchanger 1, a brazing copper plate corresponding to the shape of the heat transfer plate 13 is interposed between the plurality of heat transfer plates 13, and is heated for a predetermined time after being accommodated in the brazing furnace. During the heating, the brazing copper plate is melted to bond the plurality of heat transfer plates. Such a brazing process is included to produce the plate heat exchanger.

However, the conventional plate type heat exchanger has a disadvantage in that heat exchange efficiency is low, and the pressure loss due to the fluid flowing through the fluid is not taken into account, thereby increasing the power consumption of the pump and the compressor.

The conventional plate heat exchanger is designed to fix the heat transfer plate through welding on the side of the heat transfer plate and to pressurize the heat transfer plate by pressing the heat transfer plate. Since the pressure between the heat transfer plates is fixed by the pressure exerted on the outside plate, There is a problem in that there is a limitation in the use of

A plate heat exchanger of Korean Registered Patent No. 1102433 is disclosed as a background technology according to the present invention.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and it is an object of the present invention to provide a plasma display panel in which a plurality of spacers are disposed at regular intervals and a spacer is welded to an edge of the heat transfer plate, Shaped plate-type heat exchanger having improved pressure resistance to have high pressure resistance under high pressure by welding the supporter.

Further, by forming the heat transfer plate so as to have a protruding portion and a depressed portion repeatedly formed in an embossing pattern, the heat transfer area of the heat transfer plate can be enlarged to maximize heat exchange efficiency.

In addition, an insert groove and an insertion hole are formed in the projecting portion and the depression of the heat transfer plate so that the end portion of the supporter is inserted to easily perform the welding connection, and the outer surface of the heat transfer plate So that the end portion of the supporter can be inserted into only a large thickness of the heat transfer plate while preventing the supporter from swinging at the time of welding.

In addition, the supporters may be arranged in a staggered arrangement along the longitudinal direction of the heat transfer plate to facilitate the flow of the working fluid, while an inner plate is additionally provided between the heat transfer plate and the side plate to increase the airtightness with the outside.

According to an aspect of the present invention, there is provided a plasma display panel comprising: a plurality of heat transfer plates arranged at regular intervals to form a flow path of a plurality of working fluids; Spacers disposed along a longitudinal direction of the heat transfer plate at a widthwise edge of the heat transfer plate to form a gap between the heat transfer plates; A plurality of supporters installed on opposite sides of the adjoining heat transfer plates so as to be connected at both ends thereof; And an outer wall plate installed to surround the plurality of heat transfer plates.

In addition, it is preferable that the heat transfer plate is formed in a pattern of embossing in which protrusions and depressions are repeatedly formed.

In addition, it is preferable that an insert groove for inserting the end portion of the supporter is formed on the upper side of the protrusion so as to penetrate from one side to the other side of the heat transfer plate.

It is preferable that the insertion depth of the supporter inserted into the insert groove is inserted at a depth equal to the thickness of the heat transfer plate.

An insertion hole for inserting the end of the supporter may be formed on the lower side of the depression so as to penetrate from one side to the other side of the heat transfer plate.

In addition, it is preferable that the insertion depth of the supporter inserted into the insertion hole is inserted at the same depth as the thickness of the heat transfer plate.

Further, it is preferable that the surface portion into which the end portion of the supporter is inserted is formed to have a planar shape.

The side surface portion interconnecting the upper surface of the protrusion and the lower surface of the depressed portion may include an inclined surface formed to be inclined to interconnect the upper surface of the protruded portion and the lower surface of the depressed portion, And a convex slope formed to be convex inward of the depressed portion.

In addition, the supporter may be formed with a support for contacting the heat transfer plate and preventing the supporter from rocking during welding.

It is preferable that the height of the spacers is formed to have the same height as the interval between adjacent heat transfer plates spaced apart from each other by the supporter.

The supporter may be arranged in a zigzag shape along the longitudinal direction of the heat transfer plate on a plane of the heat transfer plate.

The outer wall plate may include a side plate coupled to the side surfaces of the plurality of heat transfer plates and a pair of outer plates coupled to the heat transfer plates located on the uppermost and lowermost sides of the plurality of heat transfer plates, An inlet and an outlet for the flow of the working fluid are formed in the outer plate of the heat exchanger, and an inner plate is provided between the heat transfer plate and the side plate for enhancing the airtightness with the outside.

According to the present invention, since a plurality of supporters welded to support the surface of the heat transfer plate adjacent to the spacer welded to the edge of the heat transfer plate can be expected to have high pressure resistance under high pressure, the durability of the plate heat exchanger can be improved, It is expected that the maintenance cost can be reduced.

In addition, since the heat transfer plate is repeatedly formed, the heat transfer area of the heat transfer plate can be enlarged to maximize the heat exchange efficiency, and the insertion depth of the supporter is limited by the support rods formed on the supporter, It is possible to prevent the liquid from being drawn out to the outside, and to smoothly flow the working fluid.

In addition, since the supporter prevents the supporter from swinging during welding, it is possible to expect a high-quality welding state, and airtightness with the outside can be secured by the inner plate provided between the heat transfer plate and the side plate.

1 is a state diagram showing a state of a conventional plate heat exchanger,
FIG. 2 is a sectional view showing a sectional state of the plate-type heat exchanger according to the present invention,
3 is a state diagram schematically showing a state of the heat transfer plate according to the present invention,
4 is a cross-sectional view showing a cross-sectional state of the heat transfer plate according to the present invention,
Fig. 5 is an enlarged view of a portion A in Fig. 4,
6 is a state diagram showing another embodiment of a side part according to the present invention;
7 is a state diagram showing still another embodiment of a side portion according to the present invention.
8 is a state diagram showing the state of the supporter according to the present invention,
9 is a state view showing a state in which the supporter according to the present invention is coupled to the heat transfer plate;
10 is a schematic view showing a state in which the supporter according to the present invention is zigzagly coupled to the heat transfer plate,
11 is a state diagram showing a welding state of a side plate according to another embodiment of the present invention,
12 is a state diagram illustrating a welding state of a side plate according to another embodiment of the present invention,
13 is a block diagram showing a manufacturing step of a welded plate heat exchanger with improved pressure resistance according to the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail. It is to be understood, however, that the invention is not to be limited to the specific embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

In addition, the thickness of the lines and the size of the constituent elements shown in the drawings may be exaggerated for clarity and convenience of explanation.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention, and may vary depending on the intent or practice of the manufacturer or manufacturer producing the article. The singular expressions include plural expressions unless the context clearly dictates otherwise. In the present application, the terms "comprises", "having", and the like are intended to specify that there are stated features, numbers, steps, operations, elements, parts or combinations thereof, But do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, or combinations thereof.

Hereinafter, a welded plate heat exchanger with improved pressure resistance according to the present invention will be described in detail. In the following description, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

FIG. 2 is a cross-sectional view of a plate-type heat exchanger according to the present invention, FIG. 3 is a schematic view showing a state of a heat transfer plate according to the present invention, FIG. 4 is a sectional view showing a heat transfer plate according to the present invention And FIG. 5 is an enlarged view of a portion A in FIG. 4, FIG. 6 is a state diagram showing another embodiment of a side portion according to the present invention, and FIG. 7 is a state diagram showing still another embodiment of a side portion according to the present invention 9 is a state view showing a state in which a supporter according to the present invention is coupled to a heat transfer plate, and Fig. 10 is a cross-sectional view of the supporter according to the present invention in a zigzag FIG. 11 is a state view showing a welding state of a side plate according to another embodiment of the present invention, and FIG. 12 is a perspective view of a side plate according to another embodiment of the present invention. A state diagram illustrating a welding state of the side plate.

A welded plate type heat exchanger having improved pressure resistance according to a preferred embodiment of the present invention includes a plurality of heat transfer plates 100 forming a flow path of a plurality of working fluids and a spacer 200 disposed at an edge of the heat transfer plate 100 A supporter 300 to which both ends are coupled to the heat transfer plate, and an outer wall plate 400 installed to surround the heat transfer plate.

That is, in the welded plate type heat exchanger having improved pressure resistance according to the preferred embodiment of the present invention, the spacers are welded to the edge of the heat transfer plate 100 in the width direction, and the plurality of supporters 300 are welded to the surface portions of the adjacent heat transfer plates So that high pressure resistance can be expected under high pressure.

A plurality of the heat transfer plates 100 are arranged at regular intervals to form a plurality of flow paths for the working fluid. A plurality of heat transfer plates 100 are stacked in a state of being spaced apart from each other by a predetermined distance. The material is made of stainless steel having excellent thermal conductivity and excellent pressure resistance And mediates heat exchange between fluids having different thermal states. Here, it is revealed that the heat transfer plate 100 is not limited to a stainless steel material but can be used if the material has excellent thermal conductivity and pressure resistance.

The ratio of the width W to the length H of the heat transfer plate 100 is desirably formed within a range of 2 to 2.5 considering the pressure loss and heat transfer amount of the fluid flowing on the space between adjacent heat transfer plates .

That is, the longer the length of the heat transfer plate 100 is, the more the pressure loss increases and the amount of heat transfer per unit area decreases. If the width of the heat transfer plate 100 is small, the pressure loss is reduced and the heat transfer amount is increased. However, if the width of the heat transfer plate 100 is small, the length of the heat transfer plate must be relatively large. (Aspect ratio = H / W) of 2 to 2.5 is preferably formed within a range of 2 to 2.5.

The heat transfer plate 100 is formed to have an embossing pattern in which the protrusions 110 and the depressions 120 are repeatedly formed, thereby enlarging the heat transfer area of the heat transfer plate, thereby maximizing the heat exchange efficiency.

The embossing pattern in which the protrusions 110 and the depressions 120 are repeatedly formed may be formed in a V shape having a predetermined channel gap CG and a predetermined corotation pitch CP.

The channel gap CG is defined as a vertical distance between the highest surface of the protrusion 110 of the heat transfer plate 100 and the lowest surface of the depression, (CP) of 2.9 to 3.5 (CP / CG), which is defined as the distance between one end of the other adjacent one of the lowest surfaces and the adjacent one of the lowest surfaces.

That is, as the channel gap (CG) is smaller, the heat transfer amount and the pressure loss of the fluid flowing between adjacent heat transfer plates increase. The larger the channel gap (CG), the lower the pressure loss and the heat transfer amount of the fluid flowing between adjacent heat transfer plates. As the pressure drop of the fluid increases, the power consumption of the pump or compressor increases.

Therefore, it is preferable that the channel gap CG is formed in a range of 2.9 to 3.5 (CP / CG) with the crocket pitch CP so that the consumption power of the pump or the compressor and the heat transfer amount of the fluid can be optimized will be.

An insert groove 130 for inserting an end of a supporter 300 to be described later is formed on an upper surface of the protrusion 110 so as to penetrate from one side to the other side of the heat transfer plate 100.

In other words, there is considerable difficulty in welding the supporter deep inside the internal space between the heat transfer plates when the supporter 300 is welded between the adjacent heat transfer plates. Therefore, in the present invention, The insert grooves 130 are formed in the insert grooves 130 so that the end portions of the supporters exposed through the insert grooves 130 and the surface portions of the heat transfer plates are directly welded to each other, So that an easy installation can be achieved.

The insertion depth of the supporter 300 inserted into the insert groove 130 is inserted at a depth equal to the thickness of the heat transfer plate 100 so that the end of the supporter 300 is positioned above the upper surface of the heat transfer plate 100 .

This is because if the end of the supporter 300 protrudes above the surface of the heat transfer plate 100, the flow of the working fluid is disturbed. Therefore, in the present invention, the depth of the supporter 300 inserted into the heat transfer plate 100 is The end of the supporter 300 is prevented from protruding outside the surface of the heat transfer plate 100 by limiting the depth of the heat transfer plate 100 to the same depth as the thickness of the heat transfer plate 100.

The supporter 300 may be installed between the adjacent heat transfer plates so that both ends of the heat transfer plate 300 are coupled to the protrusions of the heat transfer plate 300. However, So as to reduce the risk of breakage and to cope with high usage pressures easily, both ends of the supporter may be coupled to depressed portions of adjacent heat transfer plates.

At this time, an insertion hole 140 through which the end of the supporter 300 can be inserted is formed on the lower side of the depression 120 so as to penetrate from one side to the other side of the heat transfer plate 100.

In this case, the insertion depth of the supporter 300 inserted into the insertion hole 140 is preferably the same as the thickness of the heat conductive plate 100. This is because the insertion hole 140, When the end portions of the supporter 300 are inserted into the insertion hole 140 and the end portion of the supporter 300 protrudes upward from the surface of the heat transfer plate 100, 300 is limited to a depth equal to the thickness of the heat transfer plate 100, thereby preventing the end portion of the supporter 300 from protruding outside the surface portion of the heat transfer plate 100.

The upper and lower surfaces of the protrusion 110 and the depressed portion 120 to which the end of the supporter 300 is inserted are preferably formed to have a planar shape because the insert groove 130, The end of the supporter 300 inserted into the heat transfer plate 140 is not protruded to the outside of the heat transfer plate 100.

The side surface 150 connecting the upper surface of the protrusion 110 and the lower surface of the depression 120 may be inclined so as to interconnect the upper surface of the protrusion 110 and the lower surface of the depression 120. [ The concave surface may be formed to have a shape of an inclined surface to be formed, a concave inclined surface to be concaved in the inner direction of the protruding portion, and a convex inclined surface to be convex in the inward direction of the depressed portion 120.

At this time, the side portions interconnecting the upper surface of the protrusion 110 and the lower surface of the depressed portion 120 are preferably inclined but not limited thereto, and when the side surface portion is formed, the concave inclined surface and the convex inclined surface are repeated Structure as shown in FIG.

Meanwhile, the spacers 200 are disposed along the longitudinal direction of the heat transfer plate 100 at a widthwise edge of the heat transfer plate 100 to form an interval between the heat transfer plates 100.

That is, the spacers 200 are installed to prevent the outflow of the working fluid flowing between the adjacent heat transfer plates while forming the gap between the heat transfer plates 100. The height of the spacers 200 is spaced apart from each other by a supporter And a height equal to the distance between the adjacent heat transfer plates.

At this time, it is preferable that the upper and lower ends of the spacer 200 are in surface contact with the surface of the adjacent heat transfer plate and are joined by welding. It is noted that the bonding of the spacers can be combined by various welding methods depending on the manufacturing process and manufacturing conditions.

The supporter 300 is installed so that its opposite ends are connected to the facing surfaces of the adjoining heat transfer plates. The supporter 300 is a space between adjacent heat transfer plates, It may be desirable to have a shape of a column.

Here, supporters 310 are formed on the outer circumferences on both sides in the longitudinal direction of the supporter 300 so as to contact the surface of the supporter 300 to prevent the supporter 300 from swinging when the supporter 300 is directly welded.

The supporter 310 is formed to correspond to the inclination of the side part 150 when the longitudinal direction of the supporter 300 is inserted into the insert groove 130 or the insertion hole 140, So as to be inserted into the thickness of the heat transfer plate 100 while closely contacting the side portion 150 to prevent the supporter 300 from rocking during welding.

When the supporter 300 is installed between the adjacent heat transfer plates, the supporters 300 are arranged in a zigzag shape along the longitudinal direction of the heat transfer plate 100 on the plane of the heat transfer plate 100, So that it can be smoothly performed.

That is, when the supporter 300 is installed in the first, second, third, fourth and fifth columns 160a, 160b, 160c, 160d and 160e on the heat transfer plate 100, the first and second columns 160a and 160b The supporters 300 of the second and third columns 160b and 160c are arranged in a zigzag manner and the supporters 300 of the second and third columns 160b and 160c are arranged in a zigzag shape, The supporters 300 are arranged in a zigzag manner and the supporters 300 of the fourth and fifth columns 160d and 160e are arranged in a zigzag form.

The outer wall plate 400 is installed to surround the plurality of heat conductive plates 100 and includes a side plate 410 coupled to the side surfaces of the plurality of heat conductive plates and a heat conductive plate disposed on the uppermost and lowermost side of the plurality of heat conductive plates And a pair of outer sheaths 430 that are coupled to each other.

The side plates 410 are coupled to the side surfaces of the plurality of heat transfer plates 100 on which the spacers 200 are located and are coupled to the side surfaces of the heat transfer plates 100 using a single plate material It may be combined using two or more plates.

That is, the welding line 420 to which the first side plate 410 and the second side plate 410 are welded may be formed horizontally with respect to the direction Y where the plurality of heat transfer plates are mounted. At this time, the method of welding the first and second side plates 410 is not particularly limited.

In addition, the weld line 420 to which the first and second side plates 410 are welded may be formed perpendicular to the direction Y where the plurality of heat transfer plates are stacked. At this time, it is made clear that three or more side plates can be welded together for the shape of the side surface of the laminated heat transfer plates and easiness of work.

Further, when three or more side plates are welded together, the horizontal weld line 420 and the vertical weld line 420 with respect to the stacking direction of the heat transfer plates may be welded to be mixed.

An inner plate 450 may be additionally provided between the heat transfer plate 100 and the side plate 410 to enhance airtightness with the outside. The inner plate 450 is provided to have a relatively thinner thickness than the side plate 410.

The outer plate 430 is provided in a plate shape having a larger area than the heat transfer plate 100 and is coupled to the uppermost heat transfer plate and the lowermost heat transfer plate, respectively. It is preferable that the outer shell 430 has a relatively thick thickness so that the plate-type heat exchanger of the present invention can be easily used at high temperature / high pressure.

At this time, the outboard of any one of the pair of outboards is formed with an inflow / outflow path for inflow / outflow of the working fluid.

As shown in FIG. 13, the method for manufacturing a welded plate type heat exchanger according to the present invention includes a heat transfer plate forming step (S10) of forming a plurality of heat transfer plates, (S30) for installing a plurality of supporters between the heated heat transfer plate and a plate mounting step (S40) for installing an outer wall plate to surround the heat transfer plate .

In the heat transfer plate forming step S10, a plurality of heat transfer plates having an embossing pattern in which the protrusions 110 and the depressions 120 are repeatedly formed are formed through a pressing process. That is, a metal plate made of stainless steel is cut to correspond to the width and length of the heat transfer plate 100, and the metal plate is placed in a press mold having an embossed frame in which the protrusions 110 and the depressions 120 are repeatedly formed. Thereafter, the heat transfer plate 100 is formed by pressing through a press machine.

At this time, it is preferable to form the insert groove 130 and the insertion hole 140 for inserting the supporter 300 on the upper surface of the protrusion 110 and the lower surface of the depression 120.

That is, in the case of forming the through holes for forming the insert grooves 130 and the insert holes 140 when the press mold is manufactured and forming the embossed heat transfer plate by pressing the press grooves, The insert groove 130 and the insert hole 140 may be formed through a separate groove forming apparatus after the heat transfer plate 100 is manufactured.

Then, the spacers forming the spacing between the heat transfer plates adjacent to the widthwise edge of the heat transfer plate 100 are welded and fixed. At this time, the method of welding the spacer to the heat conductive plate 100 is not particularly limited.

Next, the supporter 300 is inserted into the insert groove 130 positioned opposite to the adjacent heat transfer plates in the longitudinal direction, and the supporter 300 is inserted into the insert hole 140, The ends of the supporter 300 are fixed by welding. At this time, it is preferable that the end of the supporter 300 is not protruded to the outside of the insert groove 130 or the insertion hole 140.

Here, during the preparation of the supporter 300, the protrusions 110 and the surface of the depressions 120 are contacted with the outer circumferences of both longitudinal sides of the supporter 300 to prevent the supporter 300 from rocking It is preferable to add a step of forming a support 310 for limiting the depth of the end inserted into the insert groove 130 or the insertion hole 140.

A plurality of heat transfer plates are disposed at a predetermined distance from each other, and then the outer plate 400 is used to surround the plurality of heat transfer plates to manufacture a welded plate heat exchanger with improved pressure resistance according to the present invention.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be < RTI ID = 0.0 > appreciated by one of ordinary skill in the art, that various changes and modifications may be made without departing from the scope of the invention. Therefore, the scope of the present invention is not limited to the above-described embodiments, but should be determined by the scope of the appended claims and equivalents thereof.

100: heat transfer plate 110:
120: depression portion 200: spacer
300: Supporter 310: Support
400: outer wall plate 410: side plate
430: outer plate 450: inner plate

Claims (16)

A plurality of heat transfer plates disposed at regular intervals to form a flow path of a plurality of working fluids; Spacers disposed along a longitudinal direction of the heat transfer plate at a widthwise edge of the heat transfer plate to form a gap between the heat transfer plates; A plurality of supporters installed on opposite sides of the adjoining heat transfer plates so as to be connected at both ends thereof; And an outer wall plate installed to surround the plurality of heat transfer plates,
The heat transfer plate is formed in a pattern of embossing in which protrusions and depressions are repeatedly formed, and an insert groove for inserting an end of the supporter is formed on an upper surface of the protrusion, Wherein the heat exchanger is formed of a plate-shaped heat exchanger.
The method according to claim 1,
Wherein an insertion depth of the supporter inserted into the insert groove is inserted at a depth equal to the thickness of the heat transfer plate.
The method according to claim 1,
Wherein an insertion hole for inserting an end of the supporter is formed on a lower side of the depression so as to penetrate from one side to the other side of the heat transfer plate.
The method of claim 3,
Wherein an insertion depth of the supporter inserted into the insertion hole is inserted at a depth equal to the thickness of the heat transfer plate.
5. The method according to any one of claims 1 to 4,
And a surface portion into which the end portion of the supporter is inserted is formed to have a planar shape.
The method according to claim 1,
Wherein the side surface connecting the upper surface of the protrusion and the lower surface of the depressed portion includes an inclined surface inclined to connect the upper surface of the protruding portion and a lower surface of the depressed portion and a concave inclined surface recessed inward of the protruding portion, And a convex slope formed to be convex in an inner direction of the depressed portion.
The method according to claim 1,
Wherein the supporter is provided with a support for contacting the heat transfer plate and preventing the supporter from rocking during welding.
The method according to claim 1,
Wherein the height of the spacers is formed to have the same height as an interval between adjacent heat transfer plates spaced apart from each other by the supporter.
The method according to claim 1,
Wherein the supporter is arranged in a zigzag shape along the longitudinal direction of the heat transfer plate on a plane of the heat transfer plate.
The method according to claim 1,
Wherein the outer wall plate includes a side plate coupled to a side surface of the plurality of heat transfer plates and a pair of outer plates joined to the uppermost and lowermost heat transfer plates of the plurality of heat transfer plates, And an inner plate for increasing the airtightness between the heat transfer plate and the side plate is provided between the heat transfer plate and the side plate.
delete delete delete delete delete delete

Images