Plate heat exchanger inline filter

Abstract

The present invention relates to an in-line filter for a plate type heat exchanger, in which when a fluid is supplied to a cooling fluid inlet of a plate type heat exchanger, the fluid flowing into the cooling fluid inlet is supplied into the filter tube through an inlet of the filter tube, and then flows in the channel width direction between heat transfer plates through small diameter holes, filtering out dust or foreign matter contained in the fluid. The stiffening member firmly supports the inner peripheral surface of the filter tube, thereby preventing deformation of the outer surface shape of the filter tube due to the pressure of the fluid flowing into the filter tube or the pressure of the fluid passing through the small diameter holes. According to the present invention, a stiffening member is installed along the inner circumferential surface of a filter tube of a filtration filter, and the outer shape of the filter tube is maintained by the stiffening member, and the stiffening member firmly supports the inner circumferential surface of the filter tube, preventing the outer surface of the filter tube from expanding or contracting due to the pressure of the fluid flowing inside the filter tube. Since the outer shape of the filter tube is prevented from being deformed, the diameter of the small diameter hole of the filter tube is not changed, preventing dust or foreign matter from passing through the small diameter hole. Also, the same amount of fluid can always pass through the small diameter hole to the cooling fluid inlet of the plate-type heat exchanger. Since the filter tube of the filtration filter is prevented from expanding, the filter tube can be easily separated from within the cooling fluid inlet, thereby improving the convenience of maintenance and the reliability of the product.

Description

[Technical Field]

[0001] The present invention relates to an in-line filter, and more specifically to a plate-type heat exchanger in-line filter in which a stiffening member is formed on the inner peripheral surface of a filtration filter, and the inner peripheral surface of the filtration filter is reinforced with this stiffening member to prevent the filtration filter, which allows a fluid to pass through, from being deformed by the pressure of the fluid. [Background technology]

[0002] Generally, a plate heat exchanger is a device that stacks multiple metal plates shaped in consideration of the type and flow of fluid, the structural strength of the product, etc., and alternates between the layers of heated fluid and heated fluid to exchange heat between the metal plates.

[0003] In this case, examples of the heating fluid include high-temperature fluids such as steam and lubricating oil, and examples of the receiving fluid include fluids that are relatively lower in temperature than the high-temperature fluid, such as seawater and refrigerant.

[0004] In other words, the interlayer flow passages between the metal plates separate two types of fluids with different temperatures and allow them to flow in counter or parallel flow, with heat exchange occurring as the high-temperature and low-temperature fluids cross each other layer by layer.

[0005] Plate heat exchangers are compact, lightweight, and highly efficient, and are therefore widely used in cooling and heating equipment for various boiler facilities, surface treatment facilities, wastewater treatment facilities, dyeing facilities, power plants, ships, incinerators, etc.

[0006] Patent Document 1 (KR10-0988217B1) discloses a conventional in-line filter for a plate-type heat exchanger. Referring to this, the filter comprises a main body wound in a roll shape so that adjacent surfaces formed on both ends are close to each other, forming an internal space that allows fluid to flow in, and perforations formed on the outer surface for discharging fluid, and an elastic member fastened to the adjacent surfaces of the main body to maintain the adjacent surfaces close to each other.

[0007] Here, a plurality of slots are formed at predetermined intervals on the adjacent surfaces of the main body, and fixing protrusions formed on the outer surface of the elastic member are inserted into and coupled to the slots, so that the adjacent surfaces are maintained in close proximity by the elastic member.

[0008] That is, the in-line filter is inserted into the cooling fluid inlet of the plate-type heat exchanger to seal one side of the inlet. When the cooling fluid is supplied through the other inlet, the fluid flows into the inner space of the body and then is discharged through the perforations in a direction perpendicular to the fluid supply direction, and is then supplied to the gaps between the heat transfer plates.

[0009] However, in Patent Document 1, when the working fluid is supplied to the top floor of a high-rise building or skyscraper, the pressure of the fluid passing through the heat exchanger increases. In the case of a typical (or conventional) in-line filter, the outer surface of the body expands and deforms. Furthermore, if the supply of the circulating working fluid is interrupted due to an emergency, the inside of the body becomes a vacuum state due to the back pressure that is instantly released, reducing the internal pressure and causing the outer surface of the body to contract. Due to the deformation of the outer surface shape of the body, the outer surface of the body becomes pinched inside the fluid inlet, making it difficult to remove the body installed inside the fluid inlet. Furthermore, due to the deformation of the outer surface shape of the body, the diameter of the perforations on the outer surface of the body that allows the fluid to pass through changes. When the diameter expands, dust or foreign matter passes through, and when the diameter contracts, pressure loss increases and heat transfer efficiency decreases, resulting in a decrease in the reliability of the plate-type heat exchanger. Summary of the Invention [Problem to be solved by the invention]

[0010] The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide an in-line filter for a plate-type heat exchanger in which a filter tube of a filtration filter is inserted into the filtration flow path of a plate-type heat exchanger and a stiffening member is installed along the inner circumferential surface of the filter tube. When a fluid is supplied to the fluid inlet of the plate-type heat exchanger, the fluid flows into the filter tube through the inlet of the filter tube and then through the small diameter holes toward the gaps between the heat transfer plates, filtering out dust or foreign matter contained in the fluid. The stiffening member firmly supports the inner circumferential surface of the filter tube, preventing deformation of the outer surface of the filter tube due to the pressure of the fluid flowing into the filter tube or the pressure of the fluid passing through the small diameter holes. [Means for solving the problem]

[0011] In order to achieve the above-mentioned object of the present invention, there is provided an in-line filter for a plate-type heat exchanger, which is formed by stacking and bonding a plurality of heat transfer plates. The filter is inserted into the cooling fluid inlet of the plate-type heat exchanger, and is supplied with a cooling fluid through one side connected to the cooling fluid inlet. The cooling fluid passes through the outer side so that the fluid is supplied between the heat transfer plates, filtering out dust or foreign matter contained in the fluid. The in-line filter for a plate-type heat exchanger includes: a filter; the filter is inserted into the other end of the filter and seals the other end of the cooling fluid inlet. The filter is hollow and has an inlet on one side connected to the cooling fluid inlet, and a plurality of small-diameter holes formed on the outer side that penetrate the filter and allow the fluid to pass in a direction perpendicular to the cooling fluid inlet toward the width direction of the channel between the heat transfer plates; and a stiffener that is tightly fixed along the inner circumferential surface of the filter tube and supports the inner circumferential surface of the filter tube.

[0012] In the plate heat exchanger in-line filter according to the present invention, the filter is made of an aluminum material, and its inner and outer surfaces are surface-treated by anodizing and sealing, or the inner and outer surfaces are surface-treated by anodizing and sealing and then anti-scale-coated, thereby inducing the slippage of dust or foreign matter and preventing the dust or foreign matter from being adsorbed on the inner surface.

[0013] In the plate heat exchanger in-line filter according to the present invention, the anodizing method for surface treatment of the filtration filter is as follows: TIFF0007764057000001.tif865, hydroxyl method, It is characterized by including TIFF0007764057000002.tif965 and the chromic acid method.

[0014] In the plate heat exchanger in-line filter according to the present invention, the filtration filter is subjected to a surface treatment. TIFF0007764057000003.tif865 is characterized in that the inner and outer surfaces of the filtration filter are surface treated by forming a porous oxide film.

[0015] In the plate-type heat exchanger in-line filter according to the present invention, the sealing treatment for surface treatment of the filtration filter includes hydration sealing, metal salt sealing, and organic sealing.

[0016] In the plate-type heat exchanger in-line filter according to the present invention, the hydration seal or metal salt seal used to surface-treat the filter is formed to have hydrophobicity by containing a surfactant, and is used to surface-treat the inner and outer peripheral surfaces of the filter.

[0017] In the plate-type heat exchanger in-line filter according to the present invention, the anti-scale coating for coating the filter is formed from a mixture containing Teflon, silicone resin, and sodium lauryl sulfate, and is sprayed onto the inner and outer peripheral surfaces of the filter by a spray method.

[0018] In the plate-type heat exchanger in-line filter according to the present invention, the inlet of the filter tube is bent along an inner circumferential surface of the filter tube toward the inner circumferential surface of the filter tube, and a curved guide portion is further formed to guide the cooling fluid flowing into the cooling fluid inlet so that the cooling fluid is collected and supplied into the filter tube.

[0019] In the plate heat exchanger in-line filter according to the present invention, the small diameter holes of the filter tube have a diameter that is proportional to the channel width between the heat transfer plates of the plate heat exchanger or is relatively smaller than the channel width between the heat transfer plates, thereby supplying fluid between the heat transfer plates.

[0020] In the plate type heat exchanger in-line filter according to the present invention, the stiffening member is formed as a single structure extending along the inner circumferential surface of the filter tube in a spiral shape.

[0021] In the plate type heat exchanger in-line filter according to the present invention, the stiffening members are provided in a plurality of pieces at intervals along the inner circumferential surface of the filter tube to form a spiral shape and are joined together.

[0022] In the plate type heat exchanger in-line filter according to the present invention, the stiffening members are ring-shaped, provided in plurality at predetermined intervals along the length of the filter tube, and fixed to the inner circumferential surface of the filter tube by welding.

[0023] In the plate type heat exchanger in-line filter according to the present invention, the stiffening member has a cross section formed in any one of a circular, semicircular, elliptical, and polygonal shape.

[0024] In the plate type heat exchanger in-line filter according to the present invention, the filter tube further comprises a pair of symmetrical tabs on the inner circumferential surface of the other end thereof, and tool hook grooves on the outer circumferential surface thereof, spaced apart in a row at a predetermined interval, for hooking a tool thereon. [Effects of the Invention]

[0025] According to the present invention, a stiffening member is installed along the inner circumferential surface of a filter tube of a filtration filter, which maintains the outer shape of the filter tube by the stiffening member, and the stiffening member firmly supports the inner circumferential surface of the filter tube, preventing the outer surface of the filter tube from expanding or contracting due to the pressure of fluid flowing inside the filter tube. Preventing deformation of the outer shape of the filter tube prevents change in diameter of the small diameter holes of the filter tube, preventing dust or foreign matter from passing through the small diameter holes. Furthermore, a constant amount of fluid can always pass through the small diameter holes to the cooling fluid inlet of the plate-type heat exchanger. Since the stiffening member maintains the outer shape of the filter tube, a constant fluid flow rate can be maintained while filtering out dust or foreign matter over a specified period of use. Preventing expansion of the filter tube of the filtration filter allows the filter tube to be easily separated from the cooling fluid inlet, thereby improving maintenance convenience and product reliability. [Brief explanation of the drawings]

[0026] [Figure 1] 1 is a schematic cross-sectional view showing a plate heat exchanger in-line filter according to the present invention. [Figure 2] FIG. 2 is a perspective view showing a plate heat exchanger in-line filter according to the present invention. [Figure 3] FIG. 3 is an exploded perspective view of FIG. 2. [Figure 4] 1 is a cross-sectional side view of a plate heat exchanger in-line filter according to the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0027] Hereinafter, embodiments of the present invention will be described in more detail with reference to the accompanying drawings.

[0028] Referring to Figures 1 to 4, the filter (100) is inserted into the cooling fluid inlet (12) of the plate heat exchanger (10) formed by stacking and joining a plurality of heat transfer plates (11), and receives fluid through one side thereof connected to the cooling fluid inlet (12). The filter (100) filters out dust or foreign matter contained in the fluid while allowing the fluid to pass through the outer surface so that the fluid is supplied between the heat transfer plates (11).

[0029] The filter (100) filters out dust or foreign matter contained in the fluid flowing from the cooling fluid inlet (12) of the plate heat exchanger (10) toward the heat transfer plate (11).

[0030] The filter (100) is formed in a hollow cylindrical shape and allows the fluid flowing in through the cooling fluid inlet (12) to pass through.

[0031] The filter (100) is made of aluminum, and its inner and outer surfaces are surface-treated by anodizing and sealing, or the inner and outer surfaces are surface-treated by anodizing and sealing and then anti-scale coated, which allows dust or foreign matter to slide and prevents the dust or foreign matter from being adsorbed on the inner surface.

[0032] The filter (100) is coated with an anti-scale coating to prevent dust or foreign matter contained in the fluid from adhering to the inside of the filter (100) and obstructing the passage of the fluid.

[0033] The anodic oxidation method for surface treatment of the filter (100) is TIFF0007764057000004.tif865, hydroxyl method, Includes TIFF0007764057000005.tif965 and chromic acid method.

[0034] The filter (100) TIFF0007764057000006.tif865, hydroxyl method, TIFF0007764057000007.tif965 and chromic acid method, It is preferable that the surface is treated with TIFF0007764057000008.tif865.

[0035] The filter (100) is subjected to a surface treatment. TIFF0007764057000009.tif865 forms a porous oxide film with a thickness of 50±5 μm to surface treat the inner and outer surfaces of the filtration filter.

[0036] The sealing treatment for surface treatment of the filter (100) includes hydration sealing, metal salt sealing, and organic sealing.

[0037] The hydrate sealant or metal salt sealant for surface treating the filter (100) contains a surfactant to have hydrophobicity, and treats the inner and outer peripheral surfaces of the filter.

[0038] The anti-scale coating that coats the filter (100) is made of a mixture containing Teflon, silicone resin, and sodium lauryl sulfate, and is sprayed onto the inner and outer surfaces of the filter in a spray manner to form a thickness of 10 to 40 μm.

[0039] The filtration filter (100) is hollow and comprises a filter tube (110) having an inlet (111) on one side thereof that is connected to the cooling fluid inlet (12) and a plurality of small diameter holes (112) formed through the outer surface thereof to allow the fluid to pass in a direction perpendicular to the cooling fluid inlet (12) toward the gap between the heat transfer plates (11), and a stiffening member (120) that is tightly fixed along the inner circumferential surface of the filter tube (110) and supports the inner circumferential surface of the filter tube (110).

[0040] The filter tube (110) receives fluid through the inlet (111) and guides the fluid to be discharged between the heat transfer plates (11) through the small diameter holes (112), so that dust or foreign matter contained in the fluid is trapped on the inner circumferential surface of the filter tube (110).

[0041] The small diameter holes 112 of the filter tube 110 have a diameter proportional to the channel width between the heat transfer plates 11 of the plate heat exchanger 10, or are formed relatively smaller than the channel width between the heat transfer plates 11, to supply fluid between the heat transfer plates 11.

[0042] The channel width between the heat transfer plates (11) can be adjusted during the assembly process of the plate heat exchanger (10).

[0043] The inlet (111) of the filter tube (110) is connected to the cooling fluid inlet (12) of the plate-type heat exchanger (10), allowing the fluid flowing in through the cooling fluid inlet (12) to be supplied into the filter tube (110).

[0044] The filter tube (110) is preferably formed in a net structure with a plurality of small diameter holes (112) formed on the outer surface.

[0045] The inlet (111) of the filter tube (110) is bent along the inner circumferential surface toward the inner circumferential surface of the filter tube (110), and further forms a curved guide portion (111a) that guides the fluid flowing into the cooling fluid inlet (12) so that it is collected and supplied inside the filter tube (110).

[0046] The curved guide portion (111a) guides the supply of fluid so that the fluid around the inlet (111) flows into the inlet (111).

[0047] The curved surface of the curved guide portion 111a can be adjusted by the user.

[0048] The filter tube (110) has a pair of knobs (113) formed symmetrically on the inner circumferential surface of the other end, and further has tool hook grooves (114) formed in a row on the outer circumferential surface at a predetermined interval to allow a tool to be hooked.

[0049] The knob (113) is gripped by a user and pulled by the user's pulling force, so that the filter tube (110) is released within the cooling fluid inlet (12) of the plate heat exchanger (10).

[0050] The knob (113) is preferably formed in a semicircular shape and is gripped by the user.

[0051] The tool hook groove 114 allows the end of a tool inserted into the filter tube 110 to be hooked, and when pulled by a tool (not shown) outside the cooling fluid inlet 12 of the plate-type heat exchanger 10, the filter tube 110 can be detached and separated outside the cooling fluid inlet 12.

[0052] The tool engaging groove 114 may be formed in any one of a circular, semicircular, elliptical, and polygonal shape.

[0053] The stiffening member (120) is preferably fixed to the inner circumferential surface of the filter tube (110) by welding so as to avoid the small diameter hole (112).

[0054] The stiffening member (120) supports the inner peripheral surface of the filter tube (110) and prevents deformation of the outer surface shape of the filter tube (110) due to the fluid pressure flowing into the filter tube (110) or water hammering action acting on the outer surface of the filter tube (110).

[0055] The stiffening member 120 is connected to the inner circumferential surface of the filter tube 110 in a spiral shape.

[0056] The stiffening members 120 are provided in a plurality at intervals along the inner circumferential surface of the filter tube 110 to form a spiral shape and are joined together.

[0057] Preferably, the stiffening member 120 is manufactured in a plurality of pieces having the same shape, and both ends are welded together so that they are intermittently joined together.

[0058] The stiffening members (120) are ring-shaped and provided in plurality at predetermined intervals along the length of the filter tube (110), and are fixed to the inner circumferential surface of the filter tube (110) by welding.

[0059] The stiffening member 120 has a cross section that is formed in any one of a circular, semicircular, elliptical, and polygonal shape.

[0060] It is preferable that the stiffening member 120 has a rectangular cross section and is joined to the inner circumferential surface of the filter tube 110 by welding.

[0061] A cover (200) is sandwiched to the other end of the filter (100) and seals the other end of the cooling fluid inlet (12).

[0062] The cover (200) prevents the fluid from leaking out of the plate heat exchanger (10) through the other end of the cooling fluid inlet (12).

[0063] The cover (200) is tightly fixed to the outer wall of the plate heat exchanger (10) by a fastening member (not shown) to seal the other end of the cooling fluid inlet (12).

[0064] The plate-type heat exchanger in-line filter according to the present invention constructed as above is used as follows.

[0065] First, the filter (100) is inserted into the cooling fluid inlet (12) of the plate-type heat exchanger (10), and one side of the filter (100) is aligned with the cooling fluid inlet (12) and positioned so that its outer surface faces the heat transfer plate (11).

[0066] At this time, the filter tube (110) of the filtration filter (100) is inserted into the cooling fluid inlet (12), and in this state, the inlet (111) is maintained in a state of being in direct communication with the cooling fluid inlet (12) of the plate-type heat exchanger (10), and the outer surface of the filter tube (110) is installed to maintain a state of being upright with the cooling fluid inlet (12), and the small diameter hole (112) is installed to face the heat transfer plate (11).

[0067] The cover (200) is fastened to the outer wall surface of the plate-type heat exchanger (10) corresponding to the other end of the filter tube (110) of the filtration filter (100) by fastening members (not shown) to seal the other end of the filter tube, thereby sealing the other end of the cooling fluid inlet (12).

[0068] Thereafter, when a fluid is supplied to the cooling fluid inlet (12) of the plate-type heat exchanger (10), the fluid flows toward the inlet (111) of the filter tube (110) which is connected to the cooling fluid inlet (12) of the plate-type heat exchanger (10). At this time, the fluid flowing into the filter tube (110) through the inlet (111) is pushed by the fluid pressure continuously supplied through the cooling fluid inlet (12) and passes toward the outer surface of the filter tube (110) through the small diameter holes (112).

[0069] Here, the fluid flowing toward the inlet (111) is guided by the curved guide portion (111a) formed on the inner peripheral frame of the inlet (111) and slides into the inlet (111), thereby allowing the fluid to flow toward the inlet (111) and be supplied into the filter tube body (110).

[0070] At this time, dust or foreign matter contained in the fluid passing through the filter tube (110) in the direction of the small diameter holes (112) hangs on the inner surface of the filter tube (110), and at the same time, the fluid passes through the small diameter holes (112) and is discharged in the channel width direction between the heat transfer plates (11) of the plate type heat exchanger (10), and the dust or foreign matter contained in the fluid is filtered out and the fluid is purified.

[0071] Here, as the fluid flows into the filter tube (110) and passes through the small diameter holes (112), an expansion pressure is generated on the inner peripheral surface of the filter tube (110). At this time, the stiffening members (120) formed on the inner peripheral surface of the filter tube (110) support the inner peripheral surface of the filter tube (110), thereby preventing deformation of the outer surface shape of the filter tube (110).

[0072] At this time, the fluid discharged through the small diameter holes (112) to the channel width between the heat transfer plates (11) rises vertically from the lower layer to the higher layer, forming a pressure of about 15 bar, and an expansion pressure is generated on the inner surface of the filter tube body (110).

[0073] That is, as fluid is continuously supplied into the filter tube 110 through the cooling fluid inlet 12, the fluid passes through the small diameter holes 112 and applies pressure to the inner circumferential surface of the filter tube 110. At this time, the stiffening member 120 supports the inner circumferential surface of the filter tube 110, maintaining the shape of the inner circumferential surface of the filter tube 110, thereby preventing the filter tube 110 from being deformed by the expansion pressure.

[0074] On the other hand, when the supply of fluid into the cooling fluid inlet 12 of the plate-type heat exchanger is cut off, the fluid falls freely from the higher layer to the lower layer through the channel width between the heat transfer plates 11 of the plate-type heat exchanger 10. The fluid then flows into the filter tube 110 through the small diameter holes 112 of the filter tube 110, applying pressure to the outer circumferential surface of the filter tube 110. At this time, a contraction pressure is generated on the inner circumferential surface of the filter tube 110 due to the pressure of the fluid flowing back through the inlet 12.

[0075] In this way, the stiffening member 120 supports the inner circumferential surface of the filter tube 110, preventing the filter tube 110 from being deformed by the contraction pressure.

[0076] Preferably, the stiffening members 120 are formed in a ring shape on the inner circumferential surface of the filter tube 110 at predetermined intervals, or are provided in a plurality of pieces that are intermittently joined together along the inner circumferential surface of the filter tube 110 and are joined together by welding.

[0077] Preferably, the stiffening member 120 has a rectangular cross section and is fixed to the inner circumferential surface of the filter tube 110 by welding.

[0078] Meanwhile, when the filter (100) installed in the plate-type heat exchanger (10) is to be replaced or maintained / repaired, the cover (200) is separated from the outer wall surface of the plate-type heat exchanger, and in that state, the knob (113) of the filter tube (110) is grasped and manually pulled, so that the filter tube (110) is moved backward within the cooling fluid inlet (12) and separated to the other end of the cooling fluid inlet (12).

[0079] In addition, if the filter tube 110 is pinched and fixed inside the cooling fluid inlet 12 and it is difficult for an operator to manually separate the filter tube 110, a tool (not shown) can be inserted into the filter tube 110, and the end of the tool (not shown) can be hooked into the tool hook groove 114. Then, an external device (e.g., a pulling machine) can be operated to pull the filter tube 110, causing the filter tube 110 to move backward inside the cooling fluid inlet 12, and the filter tube 110 can be separated from the cooling fluid inlet 12.

[0080] At this time, it is preferable that the tool hook groove (114) of the filter tube body (110) is installed facing the bottom surface of the cooling fluid inlet (12) to prevent it from affecting the discharge of fluid through the channel width between the heat transfer plates (11) through the small diameter hole (112).

[0081] As described above, the stiffening member 120 is tightly fixed inside the filter tube 110 of the filtration filter 100. The stiffening member 120 supports the inner circumferential surface of the filter tube 110 and prevents deformation of the outer surface shape of the filter tube 110 due to fluid pressure. The stiffening member 120 is installed along the inner circumferential surface of the filter tube 110 of the filtration filter 100, and the stiffening member 120 maintains the outer surface shape of the filter tube 110 as it is. The filter tube 110 is firmly supported, preventing the outer surface of the filter tube 110 from expanding or contracting due to the pressure of the fluid flowing inside the filter tube 110. This prevents deformation of the outer surface of the filter tube 110, preventing changes in the diameter of the small diameter holes 112 of the filter tube 110. This prevents the filter tube 110 of the filtration filter 100 from expanding, allowing the filter tube 110 to be easily separated from the cooling fluid inlet 12, thereby improving the convenience of maintenance and the reliability of the product.

[0082] The plate type heat exchanger in-line filter according to the present invention described above is not limited to the above-described embodiments, and any person skilled in the art to which the present invention pertains may make various modifications and variations without departing from the spirit and scope of the present invention as defined in the following claims.

Claims

1. a filter (100) inserted into a cooling fluid inlet (12) of a plate heat exchanger (10) formed by stacking and bonding a plurality of heat transfer plates (11), receiving a fluid through one surface thereof connected to the cooling fluid inlet (12) and filtering out dust or foreign matter contained in the fluid while passing the fluid through an outer surface thereof so that the fluid is supplied between the heat transfer plates (11); a cover (200) that is sandwiched between the other side of the filtration filter (100) opposite to the side to which the fluid is supplied and seals the other side of the cooling fluid inlet (12); In a plate heat exchanger in-line filter comprising: The filter (100) has a hollow filter tube (110) having an inlet (111) formed on one side thereof in communication with the cooling fluid inlet (12), and a plurality of small diameter holes (112) formed on the outer surface thereof to pass fluid in a direction perpendicular to the cooling fluid inlet (12) toward the channel width direction between the heat transfer plates (11); a stiffening member (120) that is tightly fixed along the inner circumferential surface of the filter tube (110) and supports the inner circumferential surface of the filter tube (110); It consists of The inlet (111) of the filter tube (110) is bent along the inner circumferential surface toward the inner circumferential surface of the filter tube (110), and further includes a curved guide portion (111a) for guiding the fluid flowing into the cooling fluid inlet so that the fluid is collected and supplied into the filter tube (110), The small diameter holes (112) of the filter tube (110) have a diameter that is proportional to the channel width between the heat transfer plates (11) of the plate heat exchanger (10) or are formed relatively smaller than the channel width between the heat transfer plates (11), thereby supplying fluid between the heat transfer plates (11), The stiffening member (120) is formed as a single structure extending along the inner circumferential surface of the filter tube (110) to have a spiral shape, The stiffening member (120) is fixed to the inner circumferential surface of the filter tube (110) by welding. The stiffening member (120) has a cross section that is either circular, semicircular, elliptical or polygonal. or formed in one shape, The filter tube (110) has a pair of tabs (113) formed on the inner circumferential surface of the other side thereof, the tabs (113) being opposed to each other, and tool hook grooves (114) formed on the outer circumferential surface thereof, the tool hook grooves (114) being spaced apart at a predetermined interval from one side of the filter tube (110) toward the other side opposite to the side to which the fluid is supplied, for allowing a tool to be hooked.

2. In claim 1, The filtration filter (100) An in-line filter for a plate heat exchanger, which is made of aluminum material and has its inner and outer surfaces treated by anodizing and sealing, or its inner and outer surfaces treated by anodizing and sealing and then anti-scale coated, to induce the sliding of dust or foreign matter and prevent the dust or foreign matter from being adsorbed on the inner surface.

3. In claim 2, The anodizing method for surface treatment of the filter (100) is as follows: , hydroxyl method, and a plate heat exchanger in-line filter comprising a chromic acid method.

4. In claim 3, The filter (100) is subjected to a surface treatment. teeth, 1. A plate-type heat exchanger in-line filter, characterized in that the inner and outer peripheral surfaces of the filtration filter are surface-treated by forming a porous oxide film.

5. In claim 2, The sealing treatment for surface treatment of the filtration filter (100) is An in-line filter for a plate-type heat exchanger, comprising hydrated seals, metal salt seals, and organic seals.

6. In claim 5, The hydration sealing or metal salt sealing for surface treatment of the filtration filter (100) is 1. A plate-type heat exchanger in-line filter, comprising: a surface-treated inner and outer peripheral surface of said filter, said surface-treated inner and outer peripheral surface being formed to have hydrophobicity by containing a surfactant.

7. In claim 2, The anti-scale coating that coats the filtration filter (100) is 1. A plate-type heat exchanger in-line filter, comprising a mixture of Teflon, silicone resin, and sodium lauryl sulfate, which is sprayed onto the inner and outer peripheral surfaces of the filter.

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