KR102637655B1 - Heat exchanger with preventing deformation caused by pressure - Google Patents

Abstract

The present invention relates to a heat exchanger having a function of preventing deformation due to pressure, and more specifically, to a heat exchanger in which deformation of a cover due to fluid pressure is prevented.
A heat exchanger having a function of preventing deformation due to pressure according to the present invention includes a casing having an opening on one or both sides and a heat exchange space through which a first fluid can pass; a tube sheet installed in the opening and having a plurality of through holes; a plurality of tubes installed in the heat exchange space to form a flow path for the second fluid to exchange heat with the first fluid in the heat exchange space, and both ends of which are connected to the through hole; A cover is provided with a chamber through which the second fluid can flow in or out, and is coupled to the tube sheet and installed to surround the through holes; and a deformation prevention unit to prevent the cover from being deformed when the pressure of the chamber increases.

Description

Heat exchanger with preventing deformation caused by pressure}

The present invention relates to a heat exchanger having a function of preventing deformation due to pressure, and more specifically, to a heat exchanger in which deformation of a cover due to fluid pressure is prevented.

Generally, a heat exchanger is a device that has a flow path inside which fluid can flow and is designed to exchange heat with other heat exchange media while the fluid passes through the flow path. Depending on the process design or type of fluid, a heat exchanger is a double pipe type (double tube type). There are various types such as pipe type, plate type heat exchanger, air cooling type heat exchanger, and coil type heat exchanger.

Republic of Korea Patent No. 10-0395289 discloses a water-cooled-air-cooled heat exchanger for large engines for cooling air using coolant, and Republic of Korea Patent No. 10-0875094 discloses a water-cooled-air-cooled heat exchanger for using high-temperature compressed air discharged from a gas turbine power generation unit. An intercooler for gas turbine power generation for cooling is disclosed. An intercooler is a type of heat exchanger that cools the air sucked into the supercharger.

The heat exchanger as described above includes a casing through which air can pass, a tube sheet installed in the casing, a cover installed to surround the tube sheet and provided with a chamber through which high-temperature or low-temperature fluid flows in or out, and is installed within the casing. It consists of a number of tubes whose ends are connected to the chamber. Such a heat exchanger performs heat exchange with air passing through the casing as the high-temperature or low-temperature fluid introduced into the chamber passes through the tube.

As these heat exchangers age, foreign substances contained in the fluid cause scale to form in the tubes, narrowing the passage through which the fluid can pass. This causes the pressure within the chamber to rise and the cover to deform, increasing maintenance costs. There is a problem with this.

Republic of Korea Patent No. 10-0395289: Water-cooled-air-cooled heat exchanger for large engines Republic of Korea Patent No. 10-0875094: Manufacturing method of intercooler for gas turbine power generation

The present invention is intended to improve the above problems, and provides a heat exchanger with a pressure-induced deformation prevention function to prevent the cover from being deformed due to an increase in pressure in the chamber caused by scale formed in the tube as usage time elapses. The purpose is to do that.

In addition, the present invention is a pressure-induced deformation prevention device that prevents the phenomenon of heat exchange efficiency being reduced as the partition rib dividing the chamber into a plurality of unit chambers separates from the tube sheet and the second fluid flows into the gap between the partition rib and the tube sheet. The purpose is to provide a functional heat exchanger.

In order to solve the above technical problem, a heat exchanger having a function of preventing deformation due to pressure according to the present invention includes a casing having an opening on one or both sides and a heat exchange space through which a first fluid can pass; a tube sheet installed in the opening and having a plurality of through holes; a plurality of tubes installed in the heat exchange space to form a flow path for the second fluid to exchange heat with the first fluid in the heat exchange space, and both ends of which are connected to the through hole; A cover is provided with a chamber through which the second fluid can flow in or out, and is coupled to the tube sheet and installed to surround the through holes; and a deformation prevention unit to prevent the cover from being deformed when the pressure of the chamber increases.

The deformation prevention unit is inserted into a coupling portion provided on the tube sheet and an insertion hole formed in the cover to correspond to the coupling portion and is coupled to the coupling portion, and the cover is connected to the tube sheet by the internal pressure of the chamber. A gap maintenance member is provided to maintain the gap between the cover and the tube sheet to prevent the tube sheet from being deformed apart.

The coupling portion consists of a screw coupling portion provided on one surface of the tube sheet so that the spacing maintaining member can be screwed together, and the spacing maintaining member includes a head portion having a larger diameter than the insertion hole, and the insertion portion from one side of the head portion. It extends to pass through the ball and includes a screw portion screwed with the screw coupling portion so that the head portion supports the cover.

The cover includes a body in which the chamber is formed, and a partition rib installed on the body to partition the chamber into a plurality of unit chambers, and a plurality of deformation prevention units are provided to sandwich the partition ribs, wherein the partition They are arranged alternately along the longitudinal direction of the ribs.

The deformation prevention unit further includes a support area expansion member installed between the head part and the cover to expand the support area of the head part.

The cover includes a body in which the chamber is formed, and a partition rib installed on the body to divide the chamber into a plurality of unit chambers, and the support area expansion member includes an insertion portion provided with a hollow portion to allow the threaded portion to be inserted through, It includes a first wing portion extending from the insertion portion along the partition rib, and a second wing portion extending from the insertion portion in a direction intersecting the partition rib, wherein the first and second wings extend from the outer peripheral surface of the insertion portion. It is provided with a plate-shaped support plate that extends and comes into close contact with the cover, and a reinforcing rib that protrudes from one surface of the support plate to prevent bending of the support plate.

As described above, the heat exchanger with the function of preventing deformation due to pressure according to the present invention prevents the cover from being deformed by maintaining the gap between the cover and the tube sheet through the deformation prevention unit even if the pressure in the chamber increases, thereby reducing the maintenance cost of the cover. can be reduced.

In addition, the heat exchanger with the function of preventing deformation due to pressure according to the present invention is installed with a plurality of deformation prevention units so that the partition ribs are sandwiched between them, and prevents the phenomenon of reduced heat exchange efficiency by supporting the cover so that the partition ribs do not separate from the tube sheet. can do.

1 is an exploded perspective view of a heat exchanger having a function to prevent deformation due to pressure according to a first embodiment of the present invention;
Figure 2 is a front view showing the cover of Figure 1;
Figure 3 is a side cross-sectional view of the heat exchanger having the function of preventing deformation due to pressure of Figure 1;
Figure 4 is an exploded perspective view of a heat exchanger having a function to prevent deformation due to pressure according to a second embodiment of the present invention;
Figure 5 is a side cross-sectional view of the heat exchanger having the function of preventing deformation due to pressure of Figure 4.

Hereinafter, with reference to the attached drawings, a heat exchanger having a function of preventing deformation due to pressure according to the present invention will be described in detail.

1 to 3 show a heat exchanger having a function of preventing deformation due to pressure according to a first embodiment of the present invention.

Referring to the drawings, the heat exchanger with the function of preventing deformation due to pressure according to the first embodiment of the present invention has an opening 111 formed on one or both sides and a casing provided with a heat exchange space 115 through which the first fluid can pass. 100), a tube sheet 200 installed in the opening 111 and formed with a plurality of through holes, and a tube sheet 200 in the heat exchange space 115 to form a flow path for the second fluid to exchange heat with the first fluid in the heat exchange space 115. A plurality of tubes 300 are installed, both ends of which are connected to through holes, and a chamber through which a second fluid can flow in or out is provided. A cover 400 is coupled to the tube sheet 200 and installed to surround the through holes. In addition, a deformation prevention unit 500 is provided to prevent the cover 400 from being deformed when the pressure of the chamber increases.

The heat exchanger with the function of preventing deformation due to pressure according to the first embodiment of the present invention exchanges heat with the first fluid within the heat exchange space 115 as the second fluid flowing into the chamber passes through the tubes 300. It cools down. The heat exchanger with the function of preventing deformation due to pressure according to the first embodiment of the present invention is an air-cooled heat exchanger in which the first fluid is air introduced from the outside.

In contrast, the heat exchanger with the deformation prevention function according to the present invention is a double pipe type, a plate type heat exchanger, and an air-cooled type depending on the shapes of the casing 100, tube 300, and cover 400. Other methods, such as a cooling type heat exchanger or a coil type heat exchanger, may be applied.

Hereinafter, each component of the heat exchanger with the function of preventing deformation due to pressure according to the first embodiment of the present invention will be described in detail.

The casing 100 includes a box-shaped body 110 with an opening 111 and a plurality of baffle plates 130 installed on the body 110 to support the tubes 300.

The body 110 is provided with an opening 111 at the front and is formed in a box shape with a heat exchange space 115 in communication with the opening 111 formed therein. The top and bottom of the body 110 are open so that external air can pass through the heat exchange space 115.

A flange 120 is formed on one front side of the body 110 so that it can be bolted to the tube sheet 200. The flange 120 is formed on the outer peripheral surface of the body 110. The flange 120 is formed in a square plate shape to be in close contact with the seat plate 210 of the tube sheet 200, which will be described later. The flange 120 is formed with a plurality of bolt fastening holes to be bolted to the seat plate 210.

The tube sheet 200 consists of a rectangular sheet plate 210 and a through hole formed in the sheet plate 210.

The sheet plate 210 is formed in a square plate shape. The seat plate 210 has a plurality of bolt fastening holes formed along its edge so that it can be bolted to the flange 120.

The through hole forming portion protrudes from the front of the sheet plate 210. A plurality of through hole forming portions are formed to be spaced apart at regular intervals along the width direction of the sheet plate 210. The through-hole forming parts protrude from one surface of the sheet plate 210, and an inlet groove 215 into which the end of a partition rib, which will be described later, can be inserted is provided between the adjacent through-hole forming parts.

The through-hole forming parts include first, second, third, and fourth through-hole forming parts 230, 240, 250, and 260 that are spaced apart from each other along the vertical direction. The first, second, third, and fourth through-hole forming parts 230, 240, 250, and 260 are sequentially formed from the top of the sheet plate 210 downward.

A plurality of through holes 270 to which tubes 300, which will be described later, can be connected are formed in each of the through hole forming parts.

The tubes 300 are formed in a hollow tubular shape to form a path through which the second fluid can flow. Tubes 300 are installed in the heat exchange space 115. The tubes 300 are formed to be bent in a 'U' shape and one side and the other side are connected to the through holes 270 of the through hole forming parts. The tubes 300 are installed to be supported by the baffle plate 130 within the heat exchange space 115.

The tubes 300 have a plurality of heat dissipation fins 340 installed on the outer peripheral surface to increase the efficiency of heat exchange between the second fluid flowing within the tube 300 within the heat exchange space 115 and the first fluid passing through the heat exchange space 115. It is desirable to be configured to improve.

The tubes 300 are divided into first, second, and third tubes 310, 320, and 330 according to the through hole forming portion where both ends are connected.

One side of the first tubes 310 is connected to the through hole 270 of the first through hole forming part 230, and the other side is connected to the through hole 270 of the second through hole forming part 240. One side of the second tubes 320 is connected to the through hole 270 of the second through hole forming part 240, and the other side is connected to the through hole 270 of the third through hole forming part 250. One side of the third tube 330 is connected to the through hole 270 of the third through hole forming part 250, and the other side is connected to the through hole 270 of the fourth through hole forming part 260.

The cover 400 includes a body 410 with a chamber formed therein, and a partition rib 420 installed on the body 410 to partition the chamber into a plurality of unit chambers.

The body 410 is formed in the shape of a square box with an open rear side. The body 410 is formed in a shape where the opening surrounds the first, second, third, and fourth through-hole forming parts (230, 240, 250, and 260). The body 410 is formed with a flange 430 protruding from the outer peripheral surface of the body 410 so as to be in close contact with the seat plate 210 of the tube sheet 200. The flange 430 has a plurality of bolt fastening holes formed to correspond to the bolt fastening holes formed in the seat plate 210.

A plurality of partition ribs 420 are installed inside the body 410. The partition rib 420 is formed in a long plate shape along the lead-in groove 215. The partition rib 420 divides the chamber into a plurality of unit chambers.

In the unit chambers, partition ribs 420 are inserted into the recess 215, and the flange 430 is bolted to the seat plate 210 to individually surround each through-hole forming part. The unit chambers include a first unit chamber 411 surrounding the first through-hole forming part 230, a second unit chamber 412 surrounding the second through-hole forming part 240, and a third through-hole forming part 250. It is divided into a third unit chamber 413 surrounding the fourth unit chamber 413 and a fourth unit chamber 414 surrounding the fourth through-hole forming part 260.

Additionally, an inlet nozzle 440 forming a flow path communicating with the first unit chamber 411 and an outlet nozzle 450 forming a flow path communicating with the fourth unit chamber 414 are installed in the body 410.

The inlet nozzle 440 is connected to a supply unit (not shown) that supplies the second fluid and allows the second fluid to flow into the first unit chamber 411.

The outlet nozzle 450 is connected to the next process (not shown) for supplying the second fluid that has reached the fourth unit chamber 414 after being cooled as it passes through the tubes 300, and is used to allow the second fluid to flow out. Euros are provided.

Drain lines are installed in the body 410 to individually discharge the second fluid in the second and third unit chambers 412 and 413. The drain line is divided into a first drain line 460 connected to the second unit chamber 412 and a second drain line 470 connected to the third unit chamber 413.

A lifting hook 480 is installed on the body 410 so that the worker can hang the hook of the crane to lift the cover 400.

Although not shown in the drawing, the cover 400, the tube sheet 200, and the casing 100 are assembled together and have a liquid gasket on the contact surface to prevent foreign substances from entering or to prevent internal fluid from flowing out. Preferably, a applied or adhesive gasket is installed.

In the heat exchanger having the function of preventing deformation due to pressure according to the first embodiment of the present invention as described above, scale is formed inside the first, second, and third tubes (310, 320, and 330) to form the first, second, and third tubes. If the second fluid does not flow smoothly between the four chambers (411, 412, 413, 414), the pressure within the first, second, third, and fourth chambers (411, 412, 413, 414) increases and the cover ( An expansion force is generated that deforms the body 410 of 400 in a direction away from the tube sheet 200.

The deformation prevention unit 500 connects the body 410 of the cover 400 to support the cover 400 in the direction of the tube sheet 200 in this abnormal operating state.

A plurality of deformation prevention units 500 are provided with the partition ribs 420 interposed therebetween. The deformation prevention units 500 are arranged alternately along the longitudinal direction of the partition ribs 420. A plurality of deformation prevention units 500 are installed with the second partition rib 422 interposed therebetween.

The deformation prevention unit 500 is inserted into the coupling portion provided on the tube sheet 200 and the insertion hole 415 formed in the cover 400 to correspond to the coupling portion, and is coupled to the coupling portion by the internal pressure of the chamber. To prevent the cover 400 from being deformed away from the tube sheet 200, a gap maintenance member 530 is provided to maintain the gap between the cover 400 and the tube sheet 200.

The coupling portion consists of a screw coupling portion 510 provided on one surface of the tube sheet 200 so that the gap maintenance member 530 can be screwed together.

The screw coupling portion 510 uses a nut provided with a female thread portion 511 on the inner peripheral surface. A plurality of screw coupling portions 510 are installed so as to sandwich the inlet groove 215 formed by the second and third through-hole forming portions 240 and 250. In addition, a plurality of screw coupling portions 510 are installed along the longitudinal direction of the inlet groove 215 formed by the second and third through-hole forming portions 240 and 250.

The screw coupling portion 510 is welded and installed on the second and third through-hole forming portions 240 and 250. The screw coupling portion 510 is preferably installed between the through holes 270 so as not to block the path of the second fluid passing through the tubes 300 connected to the through holes 270 of the tube sheet 200.

In the second and third through-hole forming parts 240 and 250, there is a receiving groove 515 at the position where the screw coupling part 510 is installed so that the end of the gap maintenance member 530 that has passed through the screw coupling part 510 can be accommodated. ) is formed.

An insertion hole 415 is formed through the body 410 of the cover 400 at a position corresponding to the screw engaging portion 510. The insertion hole 415 is formed at a position that is in line with the screw coupling portion 510. As shown in FIG. 2, a plurality of insertion holes 415 are formed with the partition rib 420 located in the center therebetween. A plurality of insertion holes 415 are formed along the longitudinal direction of the partition rib 420.

The gap maintenance member 530 has a head portion 540 with a larger diameter than the insertion hole 415, extends from one side of the head portion 540 to pass through the insertion hole 415, and has a cover ( It includes a threaded portion 550 that is screwed together with a screwed portion 510 to support the 400).

The head portion 540 is preferably formed in a polyhedral shape so that an operator can easily rotate it in the forward or reverse direction using a wrench.

The threaded portion 550 extends from the rear end of the head portion 540. The threaded portion 550 is formed in a cylindrical shape corresponding to the specifications of the screwed portion 510. It is preferable that an O-ring 560 to maintain airtightness is installed on the threaded portion 550 to prevent the second fluid from leaking through the insertion hole 415 of the cover 400.

The gap maintenance member 530 has a threaded portion 550 screwed to the female threaded portion 511 so that the head portion 540 is in close contact with the body 410 of the cover 400 and connects the body 410 with the tube sheet 200. Support it so that it does not swell in the direction away from you.

In the heat exchanger having the function of preventing deformation due to pressure according to the first embodiment of the present invention as described above, when the passage of at least one tube 300 is narrowed or blocked by scale over time, the first, second, third tubes , the pressure in the four chambers 411, 412, 413, and 414 increases, and an expansion force is applied to the body 410 of the cover 400 to swell in a direction away from the tube sheet 200. At this time, the gap maintenance member 530 prevents the body 410 of the cover 400 from being deformed by supporting the head portion 540 of the body 410 of the cover 400 in the direction toward the tube sheet 200. , has the effect of reducing repair and replacement costs of the cover 400 due to deformation. In addition, it is possible to reduce repair and replacement costs for the tube 300 whose flow path is narrowed due to scale.

In addition, in the heat exchanger having the function of preventing deformation due to pressure according to the first embodiment of the present invention, the deformation prevention unit 500 is disposed on both sides with the partition rib 420 sandwiched between them, so that the partition rib 420 is an inlet groove ( 215), the second fluid flows between the partition rib 420 and the tube sheet 200 without passing through the tube 300, thereby preventing the heat exchange efficiency of the first and second fluids from being reduced. exerts

The heat exchanger with the function of preventing deformation due to pressure according to the first embodiment of the present invention has a chamber partitioned by a partition rib 420 so that the second fluid can flow in and out through the chamber of one cover 400. Alternatively, a configuration may be applied in which a plurality of covers are installed on one side and the other side of the casing, and each cover is provided with an individual deformation prevention unit. At this time, the partition rib 420 may be omitted.

4 to 5 show a heat exchanger having a function of preventing deformation due to pressure according to a second embodiment of the present invention.

Referring to the drawings, the heat exchanger having the function of preventing deformation due to pressure according to the second embodiment of the present invention has the same configuration as the first embodiment other than the deformation prevention unit 600, so redundant description will be omitted.

Referring to the drawing, the deformation prevention unit 600 of the heat exchanger having the function of preventing deformation due to pressure according to the second embodiment of the present invention is installed between the head part 540 and the cover 400 to prevent the deformation of the head part 540. ) is further provided with a support area expansion member 700 to expand the support area.

In the second embodiment of the present invention, the spacing member 630 has a threaded portion 650 that is longer than the threaded portion 550 of the first embodiment of the present invention.

The support area expansion member 700 includes an insertion portion 710 provided with a hollow portion for inserting the threaded portion 650 therethrough, and a first wing portion 720 extending from the insertion portion 710 along the partition rib 420, It includes a second wing portion 730 extending from the insertion portion 710 in a direction intersecting the partition rib 420.

The first and second wings 720 and 730 include plate-shaped support plates 721 and 731 that extend from one outer peripheral surface of the insertion portion 710 and are in close contact with the cover 400, and one surface of the support plates 721 and 731. It is provided with reinforcing ribs (722, 732) that protrude from and prevent bending of the support plates (721, 731).

The insertion portion 710 is formed in a cylindrical shape. The hollow portion of the insertion portion 710 is formed through the threaded portion 550 so that it can be fitted. The insertion part 710 has an outer diameter smaller than that of the head part 540.

The threaded portion 650 passes through the hollow portion of the insertion portion 710 and is coupled to the cover 400 and the screw coupling portion 510, so that the head portion 540 covers the first and second wing portions 720 and 730 (400). ) and support it closely.

The support plates 721 and 731 are divided into a first support plate 721 of the first wing portion 720 and a second support plate 731 of the second wing portion 730. The first and second support plates 721 and 731 are formed in a plate shape. The first and second support plates 721 and 731 are formed to be long in a radial direction from the outer peripheral surface of one side adjacent to the cover 400 along the longitudinal direction of the insertion portion 710. The first and second support plates 721 and 731 extend in directions away from each other to form a pair.

The first support plate 721 extends long in a direction parallel to the partition rib 420 to expand the support area of the head portion 540 along the longitudinal direction of the partition rib 420.

The second support plate 731 extends long in a direction perpendicular to the partition ribs 420 and is formed to support the plurality of partition ribs 420 from above.

The reinforcing ribs 722 and 732 are divided into a first reinforcing rib 722 of the first wing 720 and a second reinforcing rib 732 of the second wing 730. The first reinforcing rib 722 protrudes from one surface of the first support plate 721 in a direction away from the cover 400. The second reinforcing rib 732 protrudes from one surface of the second support plate 731 in a direction away from the cover 400. The first and second reinforcing ribs 722 and 732 prevent the first and second support plates 721 and 731 from bending due to the expansion force of the cover 400.

In the heat exchanger with the function of preventing deformation due to pressure according to the second embodiment of the present invention, the area where the cover 400 is supported by the head portion 540 is comprised of the first and second support plates 721 and 731 and the cover ( By expanding by the contact area of 400, it effectively prevents the cover 400 from swelling.

In addition, the first support plate 721 exerts a supporting force along the longitudinal direction of the partition rib 420, thereby preventing the partition rib 420 from being bent or twisted due to deformation of the cover 400. .

In addition, the second support plate 731 supports the plurality of partition ribs 420 in close contact with the tube sheet 200, so that the ends of the partition ribs 420 are separated from the inlet groove 215 by deformation of the cover 400. It has the effect of preventing this phenomenon.

The present invention described above has been described with reference to an example shown in the drawings, but this is merely illustrative, and those skilled in the art will understand that various modifications and other equivalent embodiments are possible therefrom. will be. Therefore, the true scope of technical protection of the present invention should be determined by the technical spirit of the appended claims.

100: Casing 200: Tube sheet
300: Tube 400: Cover
500, 600: Deformation prevention unit

Claims (6)

a casing having an opening on one or both sides and a heat exchange space through which the first fluid can pass;
a tube sheet installed in the opening and having a plurality of through holes;
a plurality of tubes installed in the heat exchange space to form a flow path for the second fluid to exchange heat with the first fluid in the heat exchange space, and both ends of which are connected to the through hole;
A cover is provided with a chamber through which the second fluid can flow in or out, and is coupled to the tube sheet and installed to surround the through holes;
Provided with a deformation prevention unit to prevent the cover from being deformed when the pressure of the chamber increases,
The deformation prevention unit is inserted into a coupling portion provided on the tube sheet and an insertion hole formed in the cover to correspond to the coupling portion and is coupled to the coupling portion, and the cover is connected to the tube sheet by the internal pressure of the chamber. Provided with a gap maintenance member to maintain the gap between the cover and the tube sheet to prevent the phenomenon of deforming away from each other,
The cover includes a body in which the chamber is formed, and a plurality of partition ribs installed on the body to partition the chamber into a plurality of unit chambers,
A plurality of deformation prevention units are provided to sandwich the partition ribs, and are arranged alternately along the longitudinal direction of the partition ribs,
The tube sheet includes a rectangular sheet plate and a through hole formed on the sheet plate,
The seat plate is formed in the shape of a square plate, and a plurality of bolt fastening holes are formed along the edge so that it can be bolted to the flange of the casing,
The through hole forming portion protrudes from the front of the sheet plate, is spaced apart at regular intervals along the vertical direction of the sheet plate, and includes first to fourth through hole forming portions in which a plurality of through holes through which the tubes are connected are formed. do,
A recess is provided between the first to fourth through-hole forming parts into which the end of the partition rib can be retracted,
A drain line is installed on the body of the cover to individually discharge the second fluid in the unit chambers,
The unit chambers include a first unit chamber surrounding the first through-hole forming part, a second unit chamber surrounding the second through-hole forming part, a third unit chamber surrounding the third through-hole forming part, and the fourth through-hole forming part. It includes a fourth unit chamber surrounding the ball forming part,
A heat exchanger having a function of preventing deformation due to pressure, wherein the drain line includes a first drain line connected to the second unit chamber and a second drain line connected to the third unit chamber. delete According to clause 1,
The coupling portion consists of a screw coupling portion provided on one surface of the tube sheet so that the gap maintenance member can be screwed together,
The gap maintenance member includes a head portion having a larger diameter than the insertion hole, and a screw portion that extends from one side of the head portion to pass through the insertion hole and is screwed together with the screw engaging portion so that the head portion supports the cover. A heat exchanger having a function to prevent deformation due to pressure. delete According to clause 3,
The deformation prevention unit is installed between the head portion and the cover and further includes a support area expansion member to expand the support area of the head portion. According to clause 5,
The support area expansion member includes an insertion portion provided with a hollow portion through which the screw portion is inserted, a first wing portion extending from the insertion portion along the partition rib, and extending from the insertion portion in a direction intersecting the partition rib. It includes a second wing,
The first and second wings include a plate-shaped support plate extending from the outer peripheral surface of the insertion portion and in close contact with the cover, and a reinforcing rib protruding from one surface of the support plate to prevent bending of the support plate. Heat exchanger with anti-deformation function.

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