JP2007024343A - Safety heat exchanging plate and safety heat exchanger using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heat exchanger or the like capable of easily confirming formation of a corroded pore from the external when the corroded pore is formed on a heat exchanging plate, preventing mixing of fluids in heat exchanging, and securing safety. <P>SOLUTION: In this heat exchanger constituted by successively holding a first composite board element, the heat exchanging plate 50 and a second composite board element by side plates and joining the same, a fluid discharge passage 53 is formed on the heat exchanging plate 50 in a state of being branched from an opening 54 of a side face and extending like a comb. The fluid flowing in from the corroded pore 55 to a fluid discharge passage 53 is discharged from the opening 54 to the external of the heat exchanger, even when the corroded pore 55 is formed by corrosion of front and rear surfaces of the heat exchanging plate 50 caused by contact with the fluid. Thus the mixing of the fluids can be prevented, and the existence or nonexistence of the corroded pore 55 can be easily confirmed by monitoring the opening 54. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a safety heat exchange plate, a method of manufacturing the safety heat exchange plate, and a safety heat exchanger using the same, which can easily check when a hole has occurred in the heat exchange plate.

  In heat exchangers with different fluid flow paths along the front and back surfaces of the heat exchange plate, the heat exchange plate that mediates heat exchange between fluids is always exposed to harsh conditions such as high temperature and pressure, Often corrosion progresses and breaks occur.

  Thus, when a hole breaks, the performance of the heat exchange plate is lowered and smooth heat exchange is not performed. Furthermore, since fluids that perform heat exchange are mixed with each other, for example, when drinking water is cooled with antifreeze liquid, there is a problem in safety such as the antifreeze liquid is mixed into the drinking water and harms the human body. It was.

  However, in the conventional heat exchanger, no means for confirming that a broken hole has occurred from the outside has been taken, and safety has been neglected.

  Therefore, the problem to be solved by the present invention is that it is possible to easily confirm from the outside when a hole is formed in the heat exchange plate, and to prevent mixing of fluids that perform heat exchange, ensuring safety. An object of the present invention is to provide a heat exchange plate, a manufacturing method thereof, and a heat exchanger using the same.

  In order to solve the above-described problems, the present invention configures a safety heat exchange plate provided with a fluid discharge path extending in a predetermined pattern from one or more openings on the outer surface toward the inside.

  When a broken hole is generated in the heat exchange plate having such a structure, the broken hole communicates with the internal fluid discharge path, so that the fluid flowing in from the broken hole passes through the fluid discharge path and is discharged to the outside through the opening. For this reason, when this heat exchange plate is used in a heat exchanger, it can be easily confirmed that a hole has been ruptured from the outside due to the discharged fluid, and the fluids that perform heat exchange are mixed with each other. There is no safety.

  When the fluid discharge path is formed so as to branch from one opening provided on the outer surface of the heat exchange plate and extend in a comb shape toward the inside, it is monitored that one hole has occurred. Monitoring is easy because it can be confirmed with Moreover, since the fluid discharge path is uniformly arranged in a comb shape over the entire heat exchange plate, the accuracy of detecting a broken hole is improved.

  When the opening is provided in the peripheral surface of the heat exchange plate, the flow path of the fluid for heat exchange can be widely formed over the entire front and back surfaces of the heat exchange plate, so that the efficiency of heat exchange is good.

  If the outer surface of the safety heat exchange plate is formed from a corrosion-resistant material, the outer surface that comes into contact with the fluid is unlikely to corrode, and therefore, a broken hole is less likely to occur. Moreover, when the inside of the safety heat exchange plate is formed from a highly heat conductive material, the heat exchange efficiency is improved because the heat transfer inside the heat exchange plate is high. Here, the corrosion-resistant material refers to a material having excellent resistance to corrosion such as titanium or stainless steel, and the high heat transfer material refers to a material having excellent heat conductivity such as copper or aluminum.

  It is safe by sandwiching and joining a third plate with a predetermined pattern of through grooves reaching the peripheral surface between the airtight first plate and the airtight second plate. When a heat exchange plate is manufactured, it is only necessary to punch and press the plate-shaped raw material by pressing or the like, so that it does not take time and manufacturing costs can be reduced. Further, since the pattern of the fluid discharge path is formed by punching, it can be accurately formed into a desired pattern as compared with the case where the pattern is formed by other means such as etching.

  The first and second plates are made of a corrosion-resistant material, the frame of the third plate-like body is made of a corrosion-resistant material, and the portion surrounded by the frame is made of a highly heat-conductive material. When joined, a safe heat exchange plate whose outer surface is hardly corroded and whose inside has high thermal conductivity can be easily and inexpensively manufactured by the above-described steps.

  If one fluid flow passage is provided on one surface of the safety heat exchange plate and another fluid flow passage is provided on the other surface so as not to communicate with the fluid discharge passage, a broken hole can be easily confirmed from the outside of the heat exchanger. A safe heat exchanger can be formed.

  When one fluid flow passage is formed on one plate-like element laminated and joined to one surface of the safety heat exchange plate, and another fluid flow passage is formed on another plate-like element laminated and joined to the other surface of the safety heat exchange plate The thickness of the heat exchanger can be suppressed, and the size can be reduced.

  When a safety heat exchanger is formed by stacking and joining multiple assemblies with a safety heat exchange plate sandwiched between one plate element and another plate element, the number of heat exchange plates that mediate heat exchange is increased as appropriate. And the efficiency of heat exchange can be improved.

  By providing a fluid discharge path that communicates from the inside of the heat exchange plate to the outer surface of the heat exchange plate, if this heat exchange plate is used in a heat exchanger, the presence or absence of broken holes can be easily confirmed from the outside of the heat exchanger. In addition, even if a puncture occurs, the fluids that perform heat exchange do not mix with each other, which is safe.

  Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is an exploded perspective view showing an embodiment of a safety heat exchanger according to the present invention. As shown in the figure, the safety heat exchanger includes a pair of flat side plates 10 and 20 for sealing the whole, and a first composite plate that is sandwiched between the side plates 10 and 20 to form one fluid flow path. Heat exchange that mediates heat exchange between fluids, sandwiched between the plate-like element 30, the second composite plate-like element 40 forming another fluid flow path, and these plate-like bodies 30 and 40 It consists of a plate 50.

  As shown in the figure, the side plates 10 and 20 are flat plate members made of stainless steel having a substantially rectangular shape and the same contour, and ports 11 and 12 are provided at the corners of both ends of one side plate 10. Ports 21 and 22 are provided at both corners of the other side plate 20 so as not to overlap the ports 11 and 12. Other than these ports are completely airtight.

  The first composite plate element 30 includes a first single plate element 30a and a second single plate element 30b made of stainless steel having a uniform thickness as shown in FIGS. 2 (a) and 2 (b). As shown in FIG.

  As shown in FIG. 2 (a), the first single plate element 30a is surrounded by a frame 31a having the same outer shape as the side plates 10 and 20, and the inside is a substantially rectangular space 32a. A large number of ribs 33a for partitioning the fluid flow passage are provided from one end to the other end. The end of the rib 33a is supported by the frame 31a. The ribs 33a are formed in a pattern in which those bent in a square shape as a whole are arranged at equal intervals, and each rib 33a is bent in a smooth waveform. The same shape fluid inlets and outlets 11a and 12a corresponding to the ports 11 and 12 of the one side plate 10 are provided at the corners of both ends of the space 32a provided with the ribs 33a.

  As shown in FIG. 2 (b), the second single plate element 30b is obtained by rotating the first single plate element 30a by 180 ° as a whole on a plane. In the figure, reference numeral 31b is a frame, 32b is a space, 33b is a rib, and 11b and 12b are fluid inlets and outlets.

  When these single plate elements 30a and 30b are overlapped with each other, as shown in FIG. 2 (c), fluid flow passages that are partitioned in a substantially honeycomb shape by the ribs 33a and 33b are formed. This fluid flow passage is dead end only by the square-shaped ribs 33a and 33b in the single plate element 30a or 30b, but by overlapping, the ribs 33a and 33b are not overlapped. Since a gap corresponding to the thickness is generated, the fluid flow passage communicates from the fluid inlet / outlet port 11a (11b) to the fluid inlet / outlet port 12a (12b), and when the fluid is supplied from one fluid inlet / outlet, the other fluid passes through the honeycomb-like fluid flow passage. The fluid is discharged from the fluid inlet / outlet.

  The second composite plate element 40 includes a first single plate element 40a and a second single plate element 40b made of stainless steel having a uniform thickness as shown in FIGS. 3 (a) and 3 (b). As shown in c).

  As shown in FIG. 3A, the first single plate element 40a is surrounded by a frame 41a having the same outer shape as that of the side plates 10 and 20, and the inside is a substantially rectangular space 42a. A number of rectangular ribs 43a that define the flow passage are provided from one end to the other end. At both corners of the space 42a where the ribs 43a are provided, fluid inlets 21a and 22a having the same shape as the ports 21 and 22 of the other side plate 20 are provided.

  As shown in FIG. 3B, the second single plate element 40b is obtained by rotating the first single plate element 40a on the whole surface by 180 °. In the figure, reference numeral 41b is a frame, 42b is a space, 43b is a rib, and 21b and 22b are fluid inlets and outlets.

  When these single plate elements 40a and 40b are overlapped with each other, as shown in FIG. 3 (c), fluid flow passages partitioned into an oblique lattice-like herringbone pattern are formed by the ribs 43a and 43b. In this fluid flow path, the single plate element 40a or 40b alone has a dead end with the rectangular ribs 43a and 43b. However, by overlapping, the thickness of the ribs 43a and 43b is the portion where the ribs 43a and 43b do not overlap. Since a gap corresponding to that amount is generated, the fluid flow path communicates from the fluid inlet / outlet port 21a (21b) to the fluid inlet / outlet port 22a (22b), and when fluid is supplied from one fluid inlet / outlet, the fluid is discharged from the other fluid inlet / outlet.

  The safety heat exchange plate 50 includes a first outer plate element 50a and a second outer plate element 50c made of stainless steel having a uniform thickness as shown in FIGS. 4 (a) and 4 (c). The inner plate elements 50b having a uniform thickness as shown in FIG.

  As shown in FIGS. 4A and 4C, the outer plate elements 50a and 50c are formed of airtight plate-like bodies 51a and 51c having the same outer shape as the side plates 10 and 20, and are completely airtight.

  As shown in FIG. 4B, the inner plate element 50b is surrounded by a stainless steel frame 51b whose outer shape is the same as that of the side plates 10 and 20, and the inside is a high heat transfer portion 52b made of copper having a substantially rectangular shape. A through groove 53b is provided from the side surface of the frame 51b to the high heat transfer portion 52b. As shown in the figure, the through groove 53b extends from one point on the side surface of the frame 51b to the high heat transfer portion 52b, branches in the high heat transfer portion 52b and extends in parallel, and has a comb-like appearance as a whole.

  When these outer plate elements 50a, 50c and inner plate element 50b are overlapped in the order of FIGS. 4 (a), (b), (c), the through-groove 53b becomes a plate-like body 51a as shown in FIG. 4 (d). , 51c is formed as an isolated passage, and this comb-like fluid discharge passage 53 is formed from the side opening 54 of the safety heat exchange plate 50 toward the inside.

  As shown in FIG. 1, when the side plate 10, the single plate elements 30a and 30b, the inner and outer plate elements 50a, 50b and 50c, the single plate elements 40a and 40b, and the side plate 20 are laminated and bonded by a known bonding method such as diffusion bonding, The safety heat exchanger as shown in FIG. 5 is completed.

  Here, as shown in FIG. 5A, when a fluid is supplied from one port 11 provided in the first side plate 10 of the safety heat exchanger, the fluid inlet / outlet 11a of the composite plate element 30 communicating with the port 11 is used. The fluid flows into the fluid flow passage of the composite plate element 30, reaches the other fluid inlet / outlet 12a through the fluid passage, and is discharged from the port 12 communicating with the inlet / outlet 12a. Similarly, as shown in FIG. 5B, when another fluid is supplied from one port 21 of the second side plate 20, it enters the element 40 from the fluid inlet / outlet 21 a of the composite plate element 40 communicating with the port 21. It circulates, reaches the other fluid inlet / outlet port 22a, and is discharged from the port 22 communicating therewith. While these fluids flow through the composite plate elements 30 and 40, heat exchange is performed via the safety heat exchange plate 50. Here, since the outer surface of the safety heat exchange plate 50 that comes into contact with the fluid is made of stainless steel, it has excellent corrosion resistance and is less likely to cause broken holes. Further, since the high heat transfer portion 52b inside the safety heat exchange plate 50 is made of copper, it has excellent heat conductivity, and the heat exchange efficiency is better than the case where the inside is also made of stainless steel.

  Considering the case where the outer surface of the safety heat exchange plate 50 is corroded by contact with the fluid flowing through the composite plate element 30 as shown in FIG. The fluid flows into the fluid discharge passage 53 from the hole 55 and is discharged from the opening 54 to the outside of the heat exchanger. Therefore, even if the heat exchange plate 50 corrodes, the fluid does not mix and is safe. Further, if a gas sensor, a liquid leak sensor, or the like is attached and monitored around the opening 54 in accordance with the type of fluid for heat exchange, the presence or absence of the broken hole 55 can be easily confirmed.

  The heat exchanger shown in FIG. 1 shows an example in which two composite plate elements 30 and 40 are used, but three or more composite plate elements may be stacked via a safety heat exchange plate 50. Further, heat exchange of three or more fluids is possible by changing the position of the fluid inlet / outlet.

  Also, the fluid inlet / outlet port 11a, 11b, 12a, 12b, 21a, 21b, 22a, 22b is opened to the end face or side face of the plate-like element, thereby forming the fluid supply / discharge port on the end face and side face of the heat exchanger. Can do. As described above, even when the fluid is supplied and discharged from the end face and side face of the heat exchanger, the outer surface of the safety heat exchange plate 50 is made of stainless steel, so that it has excellent corrosion resistance and high internal copper heat transfer. Since the part 52b does not come into contact with the fluid, the copper ions are safe without being dissolved into the fluid.

  Moreover, although the rectangular plate-shaped body was shown in FIG. 1, arbitrary shapes, such as a polygon other than a rectangle and an ellipse, can be selected. Various fluids such as gas / gas, gas / liquid, liquid / liquid, gas / liquid mixture and other fluids can be selected. Moreover, the pattern of the rib which divides the fluid flow path is not limited to the illustration, and various patterns can be selected.

The exploded perspective view which shows an example of the heat exchanger of this invention (A) Plan view of the first single plate element (b) Plan view of the second single plate element (c) Plan view of the composite plate element (A) Plan view of the first single plate element (b) Plan view of the second single plate element (c) Plan view showing another example of the composite plate element (A) Plan view of first outer plate element (b) Plan view of inner plate element (c) Plan view of second outer plate element (d) Plan view of safety heat exchange plate (a), (b) is a perspective view showing a completed safety heat exchanger Top view when a hole is generated in the safety heat exchange plate

Explanation of symbols

10, 20 Side plate 11, 12, 21, 22 Port 11a, 11b Fluid inlet / outlet 12a, 12b Fluid inlet / outlet 21a, 21b Fluid inlet / outlet 22a, 22b Fluid inlet / outlet 30, 40 Composite plate element 30a, 30b, 40a, 40b Single plate element 31a , 31b, 41a, 41b Frames 32a, 32b, 42a, 42b Spaces 33a, 33b, 43a, 43b Ribs 50 Safety heat exchange plates 50a, 50c Outer plate elements 50b Inner plate elements 51a, 51c Plate-like body 51b Frame 52b High heat transfer Portion 53 Fluid discharge passage 53b Through groove 54 Opening 55 Broken hole

Claims (9)

  A safety heat exchange plate provided with a fluid discharge path extending in a predetermined pattern from one or a plurality of openings on the outer surface of the plate-like body.   The safety heat exchange plate according to claim 1, wherein the fluid discharge path branches from one opening provided on an outer surface of the plate-like body and extends in a comb shape toward the inside.   The safety heat exchange plate according to claim 1 or 2, wherein the opening is provided on a peripheral surface of the plate-like body.   The safety heat exchange plate according to any one of claims 1 to 3, wherein the outer surface is formed from a corrosion-resistant material and the inside is formed from a highly heat-conductive material.   The third plate-like body provided with a through groove having a predetermined pattern reaching the peripheral surface is sandwiched and joined between the air-tight first plate-like body and the air-tight second plate-like body. To 4. The method for producing a safety heat exchange plate according to any one of items 1 to 4.   As the first and second plate-like bodies, those formed from a corrosion-resistant material are used, and as the third plate-like body, a frame is formed of a corrosion-resistant material and is surrounded by the frame. The method for producing a safe heat exchange plate according to claim 5, wherein the material is made of a highly heat conductive material.   5. A safety heat exchanger in which one fluid flow passage is provided on one surface of the safety heat exchange plate according to claim 1 and another fluid flow passage is provided on the other surface so as not to communicate with the fluid discharge passage. .   The one fluid flow passage is formed in one plate-like element laminated and joined to one surface of the safety heat exchange plate, and the other fluid flow passage is formed in another plate-like element laminated and joined to the other surface of the safety heat exchange plate. The safety heat exchanger according to claim 7.   A safety heat exchanger in which a plurality of assemblies each including the safety heat exchange plate according to any one of claims 1 to 4 are stacked and joined between the one plate-like element and the other plate-like element.

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